ML17334B048

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Draft Rev 1 to Safe Shutdown Capability Assessment,Proposed Mods & Evaluations,10CFR50,App R,Section Iii.G.
ML17334B048
Person / Time
Site: Cook  
Issue date: 12/31/1987
From:
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:
Shared Package
ML17326B287 List:
References
NUDOCS 8702190215
Download: ML17334B048 (994)
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Text

AMERICANELECTRICPOWERSERVICECORPORATION INDIANA&MICHIGANELECTRICCOMPANYD.C.COOKNUCLEARPLANTSAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS 10CFR50,AppendixR,SectionI'II.GTABLEOFCONTENTSSECTIONINTRODUCTION

~~~~~~~~PAGE~~~~~~~~~~~111.11:21.2.11.31.41.4.11.4.2TABLEPurposeofReportExecutive SummaryResultsofAnalysisScopeofReportDefinitions, AcronymsandAbbreviDeflnltlons

~~~~~~~~~~~~~~~~~~~~~AcronymsandAbbreviations

~~~~~~~~~~~~~~~~at~~~~~~~~~~~~~~~~~~~~~~~~~~lons~~~~oo~~~~~~~~~~~~~~~~~~~~~~~~~l-l1-21-61-61-10.1-101-14AppendixR'Summary Compliance Table2.IDENTIFICATION OFFIREAREAS...........;....;........

2-12.12.22.32.42.52.6TABLES2-12-22-3FIGURESackground BIdentification ofFireZonesIdentification ofFireAreasProcedure forUpdatingCombustible'Loading Supplemental Information toSupporttheContention thatCablesinConduitEmbedded'n ConcretearenotPartoftheFireAreaIdentification ofMaximumAllowable Combustible LoadingK1FireZoneIdentification TableFireProtection FeaturesforFireAreasMaximumAllowable Combustible'oading'-1 2-32-52-112-13~~~~'~~~2172.12.11FireAreaandZoneIdentification 2.0-aEmbeddedConduit2.0.bEmbeddedConduit1287021902CK 05000821'7021~pDRF SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued).

SECTIONPAGE3.DETECTION ANDSUPPRESSION

.SYSTEMS3-13.13.1.13.1.23.23.2.13.2~2.3.2.2.13.2.2.2.,3:33.2.2.4FireDetect,ion SystemsGeneralSystemInformation SystemDescriptions FireSuppression Systems......;...

GeneralSystemInformation SystemsDescription Water'uppression SystemsCarbonDioxideSuppression SystemsHalonSuppression SystemsPartialZoneorAreaCoverage~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~l'~~~~~~~~~~~~~~~~~~~~~~~~~~~3-13-13-23-43-43-53-53-93-103-11-FIGURES3-1.3-23-33-43-53-,6Detection Detection El.591'etection Detection and620'etection Detection andSuppression andSuppression and587'ndSuppression and,Suppression

-6"to625'-10"andSuppression andSuppression ementMezzanine FlooPlanEl.601',60El.609'~El.633'l.650'lanBelowBasBasementPlan4~4.14.1.14.24.2.14.2.24.2.34.2.44.2.54.2.64.2.7SAFESHUTDOWNSYSTEMS'OMPONENTS METHOD"OFINVESTIGATION Introduction DesignBasisEventsSafetyFunctions,................

,Reactivity ControlReactorCoolantMake-upControlReactorCoolantPressureControlReactorHeatRemovalProcessMonitoring Miscellaneous.

Supporting..Function Discussion ANDCIRCUITS~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~4-14-1'4-24-24-34-34-34-44-44-411 SAFESHUTDOWNCAPABILITY ASSESSMENT,"

PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

'tr~rr,SECTION"4.34.3.14.3.24.3.34.3.44.3.4.14.3.4.24.3.4.34.3.4.44.3.4.54.3.4.64'4.4.14.4.24.4.34.4.44.4.54.4.64.4.74.4.84.54.64.74.7.14.7.24.7.34.7.44.84.94.104.11"PAGE..".;,.4-5~e~45.'....4-7

~~'e~47~a~:;.4-7.',:4-8;..:'4-10

'4-11,~e~,e4144-144-14....'4-22....,.4-24 4-27...."4-30

....,..4-32

~~~~r433~~~~~~~~~~~~e~~4-59AnalysisofSafeShutdown.S)8ttemS,.",,...'.."...I+,....

InitialAssumptions D~rSafeShutdownFunctions Reactivity ControlFunction'..'...,".,>

.'.'...',',.'......

ReactorCoolantMake-upCon'tr61ReactorCoolantPressureCoqftrgl..'",.:.'...'.",

ReactorHeatRemovalFuhctibn,'..".'...,.',;.".',."...'.'.

ProcessMonitoring Functioh.';.;*.......

Supporting Functions SafeShutdownSystemsChemicalandVolumeControl.,gyytem..(CVCS)

ReactorCoolantSystemMainSteamSystemsAuxiliary Feedwater System"...J-."-"~'~.'-.~~~~~ResidualHeatRemovalSyl'tern.'."."..',..

,Component CoolingWaterSySteih"

>.'.'....;.;~",,......

Essential ServiceWaterSystem@.'..;."..'...'<...,.....

Emergency PowerSystemIdentification ofSafeShutdo&'h"SPA'Rein" Components

.........................................

4-40Identification ofSafeShutdownCircuitsandCables.................,............,<...,...-,.........4-43 Associated CircuitsofConceI'n;..'.,'>,'...'..'"...',.',>........4-44 IntrOductlon e..eeee...

~~~e~eeee.e~~eeeee"eeeee',

~~e~~~e4-44Identification ofAssociated

Circuits, of,CommonPowerSupplyandComfnbn,En'eloSQr'6:;;;...

.'4-45SpuriousOperation Analysis.';".'.",

...,....'.',,

,....4-47Supplementary Information'elat'ed."

",",tt,0Table4-3':......~..~~r..-.'-'.'.'..:...."..',4 53Identification ofSafedhutddvn'Equi)neat-"Q'ag]ea andRacewayswithinFi'ze;Zone"9ovnd)rie's-".':,.......':"4-56 Evaluation ofthe'eparation

'of'"Saf'e,-

ShutdownSys'em(SSS)CofnpO'negtS an'6Cabe0;...

':"4-57PhysicalInspections

...'....';.";.";..".".',,';."..",,'...'....

.'.4-59 Identification ofAreas'fC'onformanca/'""'"

Nonconformance withAppendixR,SectionIII.G SAFESHUTDOWNCAPABILITYASSESSMENT gPROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONTABLES4-14-24-3SafeShutdownComponents, Unit1SafeShutdownComponents, Unit2Potential SpuriousMalfunctions ThatCouldAffectSafeShutdownPAGEFIGURES4.24.34'4.54.64.74.84.94.104.114.124.134.144.154.164.174.184.19.1.4.19.24.20SafeShutdownFunctions (SSF)RCSReactivity ControlSafeShutdownFunctions

-RCSMakeupControlSafeShutdownFunctions

-RCSPressureControlSafeShutdownFunctions

-ReactorHeatRemovalSafeShutdownFunctions Supporting System'nteraction DiagramUnit1-Main.SteamSafeShutdownFlowPath(SSFP)Unit1-MainSt'earnSafeShutdownFlowPathUnit1-Feedwater SafeShutdownFlowPathUnit1-Feedwater SafeShutdownFlowPathUnit1-Essential ServiceWaterSafeShutdownFlowPathUnit1-ReactorCoolantSystemSafeShutdownFlowPathUnit1-ReactorCoolantSystemSafeShutdownFlowPathUnit1-.Chemical andVolumeControlSystem(SSFP)Unit1-ChemicalandVolumeControlSystem"(SSFP)Intentionally DeletedUnit1-Component CoolingWaterSafeShutdownFlowPathUnit1-ChemicalandVolumeControlSystemSafeShutdownFlowPathUnit1-ResidualHeatRemovalSafeShutdownFlowPathUnit1-Emergency PowerSourceSafeShutdownFlowPathUnit1-Emergency PowerSourceSafeShutdownFlowPathUnit1-Emergency PowerSystemSafeShutdownFlowPath(OneLineDiagram)

SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGE4.214.224.234.244.254.264.274.284.294.304.314.324.334.34Unit1-Emergency PowerSystemSafeShutdownFlowPathUnit1-Emergency PowerSystemSafeShutdownFlowPathUnit1-Emergency PowerSystemSafeShutdownFlowPath(OneLineDiagram)SafeShutdownFunctional BlockDiagram-MainSteamSafeShutdownFunctional BlockDiagram-Auxiliary Feedwater SafeShutdownFunctional BlockDiagram-Essential ServiceWaterSafeShutdownFunctional BlockDiagram-ReactorCoolantSystemSafeShutdownFunctional BlockDiagram-ChemicalandVolumeControlSystemSafeShutdownFunctional BlockDiagram-Component CoolingWaterSafeShutdownFunctional BlockDiagram-ReactorHeatRemovalSafeShutdownFunctional BlockDiagram-Emergency PowerSystem(1/3)SafeShutdownFunctional BlockDiagram-Emergency PowerSystem(2/3)SafeShutdownFunctional BlockDiagram-Emergency PowerSystem(3/3)Pressurizer PORVElectrical Schematic ALTERNATIVE SHUTDOWN.................,................

5-15.15.25.2.15.2.25.2.35.2.45.2.55.2.65.2.75.2.8Introduction o~~~~o~~~~~~o~~~o~o~~~~~~~~~~Alternative ShutdownSystemDescription ChemicalandVolumeControlSystemAuxiliary Feedwater SystemEssential

.ServiceWaterSystemComponent CoolingWaterSystemMainSteamReactorCoolantSystemEmergency PowerSystemResidualHeatRemoval~~~~~~~~~~~~5-15-35-75-85-85-105-115-125-125-14 SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGE5.35.3.15.3.25.3.35.3.45.3.55.45.55.5.15.5.25.5.35.5.45.5.55.5.65.5.75.5.85.5.95.5.105.65.6.15.6.25.6.35.6.45.6.5Alternative ShutdownMethodsMethodASlMethodAS2MethodAS3MethodAS4MethodAS5DetailedResponsetotheNRCClarifications ofGenericLetter81-12Alternative ShutdownModifications CVCSCross-txe Alternate PowertoLSIPanelsESWPumpCircuitModifications ESWStrainerandValveCircuitModifications CCWPumpCircuitModifications NewThandTcforLSIPanelsNewSGPressureforLSIPanelsNewSRMforLSIPanelsNewCentralized ControlPanels-LSI-4Permanent CableforPressurizer BackupHeaterRepowering SummaryofProcedures UsedforAlternative ShutdownInitialHotStandbyLong-Term HotStandbyHotShutdownColdShutdownAlternative ShutdownSystemTechnical Specxficatlons

~o,o.,oo~~ooooooooo,o

~o..woo...a

~5-145-145-165-175-175-18~~~~~le~5-195-275-285-285-285-295.-305-305-305-315-315-325-325-325-345-355-35.....5-35 TABLES5-15-~-75-85-9Alternative ShutdownMethods/Fire ZoneMatrixNormalShutdownEquipment AffectedbyaFireWhichRequires'Operation Post-Fire toSupportMethodsASlthroughAS5ESWandCCWPumpSSSCablestobeIsolatedESWSystemSSSCablestobeRemoved SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGEFIGURES5.1.5.25.35'5.55.6.15.6.25.7.15.7.25.85.95.10.15.10.25.10.35.10.45.10.55.115.12.15.12.25.135.14.1LSI-5LSI-6SafeShutdownFunctions Alternative ShutdownFigures5.1-5.4RCSReactivity ControlRCSMakeupControlRCSPressureControlReactorHeatRemovalUseofUnit2SystemsasAlternate ShutdownSystemforUnit1Operation Figures5.5-5.8UseofUnit2CVCSandProposedCross-Tie UseofUnit2Motor-Driven AFWasAlternate ShutdownSystemUseofUnit2Motor-Driven AFWasAlternate ShutdownSystemUseofUnit2ESWasAlternate ShutdownSystemforUnit1UseofUnit2ESWasAlternate ShutdownSystemforUnit1Unit2RHRComponent CoolingWaterCross-Tie asAlternative ShutdownSystemDuringUnit1RHROperation N2SupplyforEmergency Operation ofS.G.PORVsLocationofLocalShutdownInd.Cabinets:

1-LSI-3,1-LSI-4,2-LSI-3,2-LSI-4LocationofExistingLocalShutdownInd.Cabinet1-LSI-1andProposedLocalShutdownCabinet1-LSI-5LocationofExistingLocalShutdownInd.Cabinet1-LSI-2andProposedLocalShutdownCabinet1-LSI-6LocationofExistingLocalShutdownInd.Cabinet2-LSI-1andProposedLocalShutdownInd.Cabinet2-LocationofExistingLocalShutdownInd.Cabinet2-LSI-2andProposedLocalShutdownInd.Cabinet2-CVCSCross-Tie PipingDiagramOne-LineDiagramforProposedPowerSourcestoUnit1LSIPanelsOne-LineDiagramforProposedPowerSourcestoUnit2~LEPanelsLSI.PanelPowerSupplySchematic (Typical)

Unit2PumpCircuitShown(TypicalforallESW'umps)

SECTION5.14.25.14.35.155.165.175.185.19.15.19.25.19.35.205.21.1,5.21.2,5.21.35.22SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

Unit,lESWPump.CircuitShown(TypicalforallESWPumps)Unit1ESWPumpCircuitShown(TypicalforallESWPumps)ESWPumpSchematic (Typical)

ESWPumpDischarge ValveSchematic (Typical)

ESWPumpStrainerSchematic (Typical)

ESWCross-Tie Valve(Typical)

LSIInstrumentation LSIInstrumentation LSIInstrumentation ProposedUnit1SRMInstrumentation ExistingLocalShutdownInd.CabinetsExistingLocalShutdownInd.Cabinet1-LSI-4(Unit1)2-LSI-4(Unit2)Alternate PowerSourceforUnit1Pressurizer HeatersPAGE6.REPAIRSANDCOLDSHUTDOWNOPERABILITY

......................

6-16.16.26.2.16.2.26.36.3.16.4Introduction Pressurizer HeatersRepowering ofPressurizer HeatersProcedures andMaterialforPressurRepowering Repowering ofRHRPumpsProcedures andMaterials forRepowePumpConclusions

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~izerHeaterringofRHR6-16-36-36-66-76-86-97.EXEMPTION REQUESTSANDANALYSES7-17.17.27.2.17.2.27.2.37.2.4Introduction RHR/CTSPumpArea,Auxiliary Elevation 573ftAreaDescription SafeShutdownEquipment FireProtection SystemsFireHazardsAnalysisBu~~~~ilding7-17-77-77-97-97-10 SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGE7.2.57.2.5.17.2.5.27.2.5.37.2.5.47.2.5.57.2.6ProposedModifications Ventilation DuctsPenetrations AreaDetection RHRPumpPowerCablesStairwayConclusion o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-12.7-127-137-137-137-147-14TABLE7.2-17.37.3.17.3.27.3.37.3.47.3.57.3.6SummaryEvaluation TableFireArea14Transformer AreaDescr'iption SafeShutdownEquipment FireProtection SystemFireHazardsAnalysisProposedModifications Conclusion

....,o.....

~oRoomUnit1~~~~~~~~~~t~~~~~~~~~~~~~~~t~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-167-197-197-197-207-207-217-21TABLE7.3-17.47.4.17.4.27.4.37.4.47.4.57.4.6SummaryEvaluation TableFireArea20Transformer RoomElevation 591'ftUnit2AreaDescription SafeShutdownEquipment FireProtection, SystemFireHazardsAnalysisProposedModifications Conclusion

,,i~~~~~~~~~~~~~~~~~~~7-227-247-247-247-257-257-267-26TABLE7.4-17.57.5.17.5.27.5.3SummaryEvaluation TablentialCenteFireZone29(A,B,E)

Unit1EsseWaterPumpsandMotorControlAreaDescription SafeShutdownSystemsFireProtection SystemsServicerso~~~~~~~~~~~~~7-277-297-297-307-30

/SAFESHUTDOWNCAPABILITYASSESSMENT

~PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPA'GE7.5.47.5.57.5.6FireHazardsAnalysisProposedModifications Conclusion

~~~~~~~~~~~~~~~~~~~~~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-317-327-32TABLE7.5-1SummaryEvaluation Table7-347.67.6.17.6.27.6.37.6.47.6.57.6.5.7.6.5.7.6.5.7.6.6FireZone29(C,D,F)

UniWaterPumpsandMotorAreaDescription SafeShutdownSystemsFireProtection SystemsFireHazardsAnalysisProposedModifications 1Detection System2LadderHatch3Ventilation DuctsConclusion o~o~~~~~~~~~t2EssControtialServiceCenters...............

en1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~t~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-367-367-377-377-387-397-397-397-397-40TABLE7.6-1SummaryEvaluation Table..............................

7-417.77.7.17.7.27.7.37.7.47.7.57.7.5.7.7.5.7.7.5.7.7.5.7.7.6TABLE7.7-11234FireZone29GScreenhouse AuxiElevation 575ft,BothUnitsAreaDescription SafeShutdownEquipment FireProtection SystemsFireHazardsAnalysisProposedModifications FireDetection HatchCondu1ts~~~~~~~~~~~~~~~~~~~~~PumpPowerandDischarge ValveConclusion

~~~~~~o~~~~~~i~~~~.SummaryEvaluation Tableliary'MCCRoom~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~1~~~t~~~~~~~~~~~~~~~tsCondui~~~~~~~~~~~~~~~~~~~~~~~~7-437-437-447-447-447-477-477-477-487-487-487-50 SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSED'MODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGE7.87.8.17.8.27.8.37.8.47.8.57.8.5.17.8.5.27.8.5.37.8.6FireArea33,33A,33Band105Unit1EastMainSteamValveEnclosure andContractor AccessControlBuildingFireAreaDescription SafeShutdownEquipment FireProtection SystemsFireHazardsAnalysisProposedModifications FloorGratePenetrations FireDetection Conclusion 7-527-527-527-537-537-547-547-547-547-55'TABLE7.8-17.97.9.17.9.27.9.37.9.47.9.57.9.5.17.9.5.27.9.5.37.9.6SummaryEvaluation TableFireArea34,34A,34BUnValveEnclosure FireAreaDescription SafeShutdownEquipment FireProtection SystemsFireHazardsAnalysisProposedModifications FloorGratePenetrations FireDetection Conclusion it2EastMainSteam7-567-587-587-587-597-597-607-607-60.7-607-60TABLE7.9-17.107.10.17.10.27.10.37.10.47.10.57.10.5.17.10.5.27.10.5.37.10.5.47.10.6SummaryEvaluation TableFireZone.44SAuxiliary BuildingElevation 609ft,BothUnitsFireZoneDescription SafeShutdownEquipment FireProtection SystemsFireHazardsAnalysisProposedModifications WaterSuppression SystemFireBarrierFireDetection FireDampersConclusion

~~~~~~~~~~~~~~~~~~~~~~South,~~~~~~~~~~~~~~~~~~~~~7-627-647-647-667-667-677-687-687-707-707-717-71xi SAFESHUTDOWN"CAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTIONPAGETABLE7.10-17,117.11.17.11.27.11.37.11.47.11.57.11.5.17.'11.5.2 7;-11.5.3 7<11.6TABLE7~1117.127.'-12.17.12.27.12.37.12.47.12'.57.12.5.17.12.5.27.12.5.37.12;5'.4'.12.6

"'ummaryEvaluation

=-TableJiFireArea53Unit1ControlFireAreaDescription SafeShutdownEquipment FirePrcrt'ection'Systems FireHazardsAnalysisProposedModifications FloorandCeilingHatchesConnecting'-

Dobr':..........

HotShutdownPanelConclusion""

i-'a.i.4.'...~~SummaryEvaluation TableFireArea5'4'Unit2ControlFi:reAie'a'DiscVipti6n Safe'ShMdbwn.EquipmentFireProtection SystemsFire~HazardsAnalys.is-

.....Proposed.

Mo'difiCationsFloor-nd Ceili'ngHÃtchesConnecting DoorVentilation" GUct'-;..'.......

~Hot'Shutdo'wn.

iRa'heiS,.rConclusion'.....:A=..........

~~~~~~~~~~~~~~~~~~~~~~~~~~~Room~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~oomR~~~~~~~~~~~~~~~~~~~~~.~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7737-757-757-757-767-767-777-787-787-787-787-807-827-827-827-837-837-857-85.7-857-857-857-86TABLE7.12-1@Ummar..y,804:lUaMo.'n Table\7.13P'util.iargi Buli,Ming

.HVACDuctPene~~~~~~~~~~~~\~~~~~~~~trations7-877-89TABLES7.13-1~6AirRegisterLocation7.14Containment SeismicGaps7-107 SECTIONTABLES7.14-1-17.14-1-27.14-2-17.14-2-2FIGURESSAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

Unit1FireAreas/Zones Protected byAutomatic C02Suppression Unit2FireAreas/Zones Protected byAutomatic C02Suppression Unit1FireAreas/Zones ofConcernUnit2FireAreas/Zones ofConcernPAGE7.27.37.47.5.17.5.27.5.37.6.17.6.27.7.17.7.27.7.37.87.97.10.17.10.27.10.37.10.47.10.57.10.67.10.77.10.87.10.97.117.127.13-1~8RHR/CTSPumpAreaAuxiliary BuildingFireZone1,lA-HTransformer RoomUnit1FireZone.14.Transformer RoomUnit2FireZone20ESWPumpAreasUnit1andUnit2FireZones29,29A,29B,29C,29D,29E,29FESWPumpAreaUnit1FireZone29A&29BESWMCCAreaUnit1FireZone29EESWPumpAreaUnit2FireZone29C,DESWMCCAreaUnit2FireZone29FPlanViewofFireZone29GManualFirefighting Equipment Available forZone29GFirefighting Equipment LocatedinZone29GEastMainSteamEnclosure MainSteamPipingandWestNESWPipingAreaUnit1FireZones33,33A,33BEastMainSteamEnclosure MainSteamPipingandWestNESWPipingAreaUnit2FireZones34,34A,34BAuxiliary BuildingGeneralOutlineofFireZones44N,44SZone44S-SouthEndAuxiliary BuildingCCWPumpsProposedFireBarrierLocationFireZone44SPlanandElevation ofCeilingLedgeinFireZone44SProposedPlanLayoutofSuppression andDetection SystemsSchematic Elevation ViewofDetection andSuppression SystemsFireBarrierBetweenComponent CoolingWaterPumpsElevation ofCCWPumpFireBarrierFireBarrierBetweenComponent CoolingWaterPumpsControlRoO'mUnit1Zone53ControlRoomUnit2Zone.54AirRegisterLocations

'SECTION8.SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS,(continued)

PAGEPROPOSEDMODIFICATIONS

...............................

8-18.18.1.18.1.28.1.38.28.2.18.2.28.2.38.38.3.18.3.28.3..38.48.4.18.4.28.4.38.58.5;-18.5.28.5.38.5A8.5A.18.5A.28.5A.38.6'.6.18.6.28.6A8.6A.18.6A.28.6A.38.78.7.18.7.28.7.3FireArea1(FireZones1,lAthroughlH,136,138A,138Band138C)RHRandCTSPumpArea..ConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireZone5EastEndoftheAuxiliary BuildingBetweentheUnit1andUnit2ChargingPumpCubicles....................................

ConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireZones6A,6N,6M,6S,61,64A,,64B, 65Aand65BAuxiliary BuildingElevations 587ftand601ftConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea12.Unit1Quadrant2PipingTunnelConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea14Unit1Transformer RoomConduitandCableTrayProtection Suppression andDetection BoundaryEvaluations FireArea15Unit1-DieselGenerator RoomConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea17CAuxiliary Feedwater Vestibule ConduitandCableTrayProtection Suppression

.andDetection Fire'Area19-Unit2DieselGenerator RoomConduitand'ableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea20.Unit2Transformer RoomConduitandCableTrayProtection Suppression andDetection BoundaryEvaluations 137~~~~~~~~~~~~~~~~8-48-48-58-58-78-78-88-88-98-98-108-108-118-118-118-118-128-128-128-128-12A8-12A,8-12A8-12A8-138-138-138-138-138-148-148-14.8-148-148-14xiv

~~IISAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued')

SECTION8.88.8.18.8.28.8.38.98.9.18.9.28.9.38.108.10.18.10.28.10.3S.ll'8.11.18.11.28.11.38.128.12.18.12.28.12.38.138.13.18.13.28.13.38.148.14.18.14.28.14.38.158.15.18.15.28.15.30IFireArea22Unit2Quadrant2Piping'Tunnef-'....

ConduitandCableTrayProtection'..."'..'-"...:<."..~...

Suppression andDetection

......;".'-;..!.'.:.-...."...

BoundaryModifications/Evaluati'ons';';..;..';-.!."'...

FireZone29(A,B,E)

Unit1ESW.PumpArea':.Including theMCCsConduitandCableTrayProtection Suppression andDetection

,BoundaryModifications/Evaluations

'-..".'..:-..".'......

FireZone29(C,'D,F)Unit2ESWPump'Area:Including theMCCsConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluati'ons FireZone29GUnit1andUnit2Screen'houS'e Auxiliary MCCRoomConduitandCableTrayProtection"......'.'.'.;.:.'."..

Suppression andDetection BoundaryModifications/Evaluations'.;.;;

FireArea33,33A,33B and105Unit:1-Ea'st.Ma'in'-."

SteamValveEnclosure, MainSteam"Piping A'r'ea,WestNESWValveArea,andContractor"-Access ControlBuildingConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea34,34A,34BUnit2'East'MaioliSteam'-ValveEnclosure, MainStea'mPipingArea,-'and:WestNESWValveAreaConduitandCableTrayProtecti'on" Suppression andDetection BoundaryModifications/Evaluati:one FireArea40(AandIB)Unit14kV'Switcfigear

'oomsandFireArea41Unit1ESSaidMCCRoomsL~~~~~~~~~L~~~ConduitandCableTrayProtection'.';..~;";A..::.~..

Suppression andDetection BoundaryEvaluations FireZone43AccessControlArea~.;i.'-."...:

ConduitandCableTrayProtection Suppression andDetection BoundaryEvaluations PAGE~~~~~~~~~~~~I~~~~~~~~~~I~~~8-158-158-158-158-158-158-168-168'-168-168-178-17~~~~~~8-188-18~~~&-19~~~~~~~~~~8-198-198-198-19I~~~~~~~~~~~~~~~L~~~~~~~~~~8-205-208-20~8-208'-218'-218-218-21~8-218-218-218-218'-19XV SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

SECTION8.168.16.18.16.28.16.38.178.17.18.17.28.17.38.188.18.18.18.28.18.38.198.19.18.19.28.19.38.208.20.18.20.28.20.38.218.21.18.21.28.21.38.228.22.18.22.28.22.38.238.23.18.23.28.23.38.248.24.18.24.28.24.3FireZones44Nand44SAuxiliary BuildingComponenCoolingWaterSystemAreaElevation 609ftConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea47(AandB)Unit24kVSwitchgear RoomsandFireArea45Unit2ESSandMCCRoomsConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireZones49and50Unit1andUnit2HVACVestxbuleConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireZones51and52EastandWestEndofAuxiliary BuildingElevation 633ftConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea53Unit1ControlRoomConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea54Unit2ControlRoomConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations Fire'Zone 57Unit1ControlRoomCableVaultConduitandCableTrayProtection Suppression and'Detection BoundaryModifications/Evaluations FireZone58Unit2ControlRoomCableVaultConduitandCableTrayProtection Suppression andDetection BoundaryModifications/Evaluations FireArea62(A,B,C)

Unit1ChargingPumpAreaandFireArea63(A,B,C)

Unit2ChargingPumpAreaConduitandCableTrayProtection Suppression andDetection BoundaryModifications 0PAGE8-228-228-238-248-258-258-258-258-258-258-258-268-268-268-268-268-278-278-278-278-288-288-288-288-298-298-298-298-298-298-298-298-298-298-298-30xv1 SECTION8.258.25.18.25.28.25.38'.268.26.18.26.28.26.38.278.27.18.27.28.27.38.288.298.29.18.29.2~8.29.38.308.318.31.18.31.28.31.38.31.48.31.58.328.32.18.32.28.32.3,8.32.4TABLE8-1SAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued).

FireZone79Unit1TurbineRoomBetweentheUnit1Emergency DieselsConduitandCableTrayProtection Suppression andDetection BoundaryModifications FireZone85Unit2TurbineRoomBetweenUnit2Emergency DieselsConduitandCableTrayProtection Suppression andDetection BoundaryModifications FireZone122Unit1Containment Instrument RoomConduitandCableTrayProtection Suppression andDetection BoundaryModifications FireZone123Unit2Containment Instrument RoomFireZones66,74Units1and2Containment PipingAnnulus;FireZones67,75Units1andLowerVolume;FireZones120,121Units1andContainment Accumulator Enclosure ConduitandCableTrayProtection Suppression andDetection BoundaryModifications ChemicalandVolumeControlSystem(CVCS)ProcessMonitoring SystemRepowering ofExistingLSIPanelsSteamGenerator Pr'essure forLSIPanelsSourceRangeMonitoring atLSIPanelsCentralized ControlRoomPanelLSI-4ThandTcforLSIPanelsESWSystemESWPumpCircuitModifications ESWStrainerandValveCircuitModifications CCWPumpCircuitModifications Emergency PowerSystem(EPS)WrappedRaceways/Cables byFireZonePA'GE8-308-308-318-318-318-318-328-328-328-328-328-328-328-338-338-338-338-338-348-34.8-348-348-348-358-358-358-368-368-36xv11 SECTIONSAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

PAGE9.9.19.29.39~49.59.69.79.89.99.109.119.129.139.149.159.169.179.189.199.209.219.229.239.249.259.269.279.289.29BOUNDARYEVALUATIONS FireZone43andFireZone91DuctEvaluation FireArea54andFireZone73DuctEvaluation CCWPumpAirSupplyDuctEvaluation (FireZone44S)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~Auxiliary BuildingVerticalAirShaftsEvaluation (FireAreas12and22)FireZones70and73HatchEvaluation 601ftPipeTunnelEvaluation (FireZone6A)Fire.Area13andFireArea14BoundaryEvaluation FireArea21andFireArea20BoundaryEvaluation FireAreaContaining FireZones3,32,36,48,and69andFireAreaContaining FireZones49,50,51,and52BoundaryEvaluation FireArea43andFireZone44NBoundaryEvaluation Units1and2TurbineBuilding, MainSteamPipeTunnelsandService/Office BuildingEvaluation TurbineBuildingandScreenHouseBoundaryEvaluation FireArea53andFireArea57HatchEvaluation FireZone43andFireArea56HatchEvaluation FireZone40BandFireArea55HatchEvaluation FireArea41andFireArea55HatchEvaluation FireArea54andFireArea58HatchEvaluation FireZone52andFireArea59HatchEvaluation FireArea45andFireArea60HatchEvaluation FireZone47BandFireArea60HatchEvaluation FireZone110andFireZone43DoorEvaluation FireZoneillandFireZone44SDoorEvaluation FireArea116BoundaryEvaluation FireArea117BoundaryEvaluation Essential ServiceWaterPumpHouseHatchandFireDamperEvaluation FireArea9andFireArea10BoundaryEvaluation FireArea24andFireArea25BoundaryEvaluation FireArea61andFireZone5BoundaryEvaluation FireArea105andFireAreas33,33A,33BBoundaryEvaluation 9-19-69-109-159-219-459-489-629-679-729-769-809-859-889-939-989-1039-1089-1139-1199-1249-1299-1349-1409-1459-1519-1649-1689-1729-176 SECTIONSAFESHUTDOWNCAPABILITY ASSESSMENT, PROPOSEDMODIFICATIONS, ANDEVALUATIONS TABLEOFCONTENTS(continued)

PAGE9.309.31-9.329.339.349.359.369.379.389.399.409.41FireZones3,32,36,48,49,50,51,52,69andFireAreas106,107,31,35,146BoundaryEvaluation

.........................................

9-181BoundaryEvaluation ofFireZones62A,62B,and62C...9-185BoundaryEvaluation ofFireZones63A,63Band63C....9-192FireZone6AtoFireZone138BBoundaryEvaluation....

9-199FireZone36toFireZone5BoundaryEvaluation.......

9-204FireZone108toFireZone33ABoundaryEvaluation....

9-210FireZone109andFireZone34ABoundaryEvaluation...

9-217FireZone32toFireZone5BoundaryEvaluation.......

9-224FireZone69toFireZones108and109BoundaryEvaluation..........................................

9-231FireZone70toFireZone129BoundaryEvaluation.....

9-238FireZone7toFireZone61BoundaryEvaluation

......9-241FireZones37and51HVACDuctPenetrations

..........

9-246FIGURES9.3-19.3-29.3-39.6-19.6-29.6-39.6-49.6-59.6-69.6-79.6-89.6-99.6-109.6-119.6-129.6-139.6-149.6-15PlanandElevation ofCeilingLedgeinFireZone44SFireBarrierbetweenCCWPumpsElevation ofCCWPumpFireBarrier587ftPipeTunnelEvaluation 609ftPipeTunnelEvaluation LocationofPipeTunnelSectionA-APipeTunnelEvaluation 609ftPipeTunnelEvaluation 601ftCeilingPipeTunnelEvaluation 601ftFloorPipeTunnelEvaluation 601ftWallNo.1PipeTunnelEvaluation 601ftWallNo.2PipeTunnelEvaluation 601ftWallNo.3PipeTunnelEvaluation 601ftWallNo.4PipeTunnelEvaluation 601ftWallNo.5PipeTunnelEvaluation 601ftWallNo.6PipeTunnelEvaluation 601ftWallNo.7PipeTunnelEvaluation 601ftWallNo.8PipeTunnelEvaluation X1X 1.INTRODUCTION 1.1PuroseofReortThepurposeofthisreportistoidentifythesafeshutdownsystemrequirements oftheDonaldC.CookNuclearPlant,Units1and2,relativetothefireprotection guidelines of10CFR50AppendixR.Forthoseplantareaswherefireprotection ofthesafeshutdownsystemsandtheirassociated circuitsarenotin,compliance, analysesarepresented andmodifications areproposedforthepurposeofmeetingtheNuclearRegulatory Commission's (NRC)requirements.

Inafewareas,exemptions arerequested fromthespecificrequirements ofSectionIII.Gwherecompliance withtheregulation wouldnotsignificantly enhancefireprotection abovethatofpresentcommitments.

TheNRCmanagement hasestablished thatthereporting processregarding AppendixRisoneof"Management byException".

0ThisprocesssuggeststhatthecontentsofthisAppendixRsubmittal neednotexhaustively addresseveryinstanceofcompliance byincluding thedetailsofthesupporting analyses.

Rather,itshouldfocusonthemethodsbywhichIndianaandMichiganElectricCompanyhasdetermined thateither:(1)TheDonaldC.Cookdesigncomplieswithorwillcomplywiththespecificrequirements ofAppendixR,SectionIII.G;or(2)Exemptions arerequested fromthespecificrequirements ofAppendixRSectionIII.G.Byanalysisandimplementation ofproposedmodifications, theleveloffireprotection willprovideassurance thatatleastonetrainofredundant safeshutdownsystemswouldbefreeoffiredamage.Pagel-l R/AEP/1IP1881.2Executive SummarInaccordance withtheguidancegiveninAppendixR,"...thatlicensees shouldre-examine thosepreviously

.approved configurations offireprotection thatdonotmeettherequirements asspecified inSectionIII.GtoAppendix=R...",adetailed, re-examination andre-analysis oftheDonaldC.CookNuclearPlant'ssafeshutdowncapability hasbeenperformed.

Theresultsofthatre-examination andre-analysis, includedinthisreport,builduponthepreviousfireprotection activities performed undertheguidelines ofBranchTechnical Position-(BTP)'APCSB9.5-1,theresponsetowhichwassubmitted in1977.There-analysis alsoconsiders othersubsequent fire.improvements, incorporated intotheD.C.Cookfacility.

protection ThisreportreviewsIndianaandMichiganElectricCompany's

\DonaldC.CookNuclearPlant,Units1and2(DocketNos.50-315and50-316)safeshutdownsystemsandtheirassociated circuitsforcompliance with10CFR50AppendixR,SectionIII.G.Thisreportalsoincludesthedescriptions ofproposedalternative shutdownsystemsandprovidessufficient technical information toWpermitNRCStaffreviewandapprovalofproposedplantmodifications.

Finally,thoseareasofnoncompliance withthePprovisions ofAppendixRareidentified, andasubsequent, Psubstantive basisforequivalent protection tothepublichealthandsafetyisdemonstrated throughdetailedanalysis.

Page1-2 R/AEP/1,P188Thisreportwaspreparedinthefollowing manner.First,aprocessofselection anddocumentation oflimitingsafetyconsequences andsafeshutdownsystemperformance goalswasconducted fortheDonaldC.CookNuclearPlant.Ananalysiswasthenperformed toidentifyaminimalsetofprimaryandauxiliary safeshutdownsystemsnecessary tosupportsafeshutdownintheeventofapostulated exposurefire.Aftertherequisite systemswereidentified, therelatedcomponents andcircuits(including associated circuits) werereviewedforcompliance withthespecificseparation criteriaof10CFR50AppendixR,SectionIII.G.2.Forthoseareasnotincompliance, studieswerecompleted todetermine whether:(1)Modifications orchangestoplantfireprotection orsafeshutdownsystemfeatureswererequiredtobringthezoneintocompliance; or(2)Alternative ordedicated shutdowncapability wasrequiredtobringthezoneintocompliance; or*(3)Anexemption wasj.ustified forthespecificfirezone'inquestion.

Subsequent toissuanceoftheAppendixRMarch1983submittal, thedesignandimplementation oftheproposedmodifications wasbegun.Someoftheproposedfireprotection modifications werereviewedandinsomeinstances itwasidentified thatthemodifications couldnotphysically beimplemented (e.g.,upgrading theaccesshatchestothree-hour fire-rated).

Duringthisperiod,thefireareaboundaries hadalsoundergone areevaluation process.Thisreevaluation identified additional areasofconcern.Theseconcernswereevaluated andotheroptionswereidentified inordertobringthePage1-3 R/AEP/1,P188D.C.Cookpowerplantintocompliance withtherequirements of10CFR50AppendixR.Thefollowing approaches weretakentoresolvetheidentified areasofconcern:(1),Propose.additional modifications (seeSection8).(2)Providejustifications forexistance ofunratedbarriers, HVACducts,doors,hatchesand/oropenings(seeSection9).(3)Combine-fireareasintoalargerfirearea.Inthesecases,systemsanalyseswereperformed toensureonetrainofsafeshutdownsystemsremainsunaffected (seeSections2and9).(4)Requestexemption andprovidejustification fortheexemption (seeSection7).PortionsofD.C.Cookpowerplantwerenotidentified as.firezones=intheMarch1983submittal.

Theseareasdonotcontainsafe'shutdown cablesorcomponents andwerenotincludedinanyidentified fireareas.Duringthereevaluation process,theseareasweregivenafirezonedesignation andincludedinthepreviously identified fireareas.Theresultsoftheseactivities, arelistedinSummaryTable1-.1.Thetableidentifies thefireareasandfirezonesattheD.C.CookPlant,theapplicable AppendixRprovisions, andthetechnical approaches selectedtoachievetheappropriate levelsofprotection.

Tablel-lincludestheunidentified firezones4andpresentsthecondition/status ofeachfirezoneatthetimeoftheMar'ch1983submittal.

Tablel-lofthisreportcorrelates toTablel-loftheMarch1983submittal, buthasbeenreformatted andincludesadditional information.

Page1-4 R/AEP/1,P188Theresultsofthisre-analysis andre-examination canbesummarized asfollows:Separation betweenrequiredsafeshutdowncircuits, whichmeetsthespecificrequirements ofSectionIII.G.2ofAppendixRto10CFR50,existsorwillexistin147ofthefirezonesreviewed.

(2)Alternative

shutdown, whichmeetstherequirements ofSectionIII.G.3andIII.LofAppendixRto10CFR50,willexistfor51firezones.(3)(4)Twotechnical exemption requestsweresubmitted subsequent totheMarch1983submittal.

Theexemptions were(a)Auxiliary BuildingHVACductsand(b)Containment Buildingseismicgaps.Threeexemption requestsfromthespecificrequirements ofSectionIII.G.2ofAppendixRarerequested infirezoneswherezonefeaturesprovideequivalent protec-tion.(5)Eightexemption requestsfromthespecificrequirements ofSectionIII.G.3ofAppendixRarerequested infirezoneswherezonefeaturesprovideequivalent protec-tion.(6)(7)Allassociated circuitsofconcernhavingaseparation lessthanthatrequiredbySectionIII.G.2ofAppendixRto10CFR50,andhavingacommonpowersourcewiththeshutdownequipment, willbeelectrically protected fromthepost-fire shutdowncircuitofconcernbycoordinated circuitbreakers, fusesorsimilardevices.Allassociated circuitsofconcernhavingaseparation lessthanthatrequiredbySectionIII.G.2ofAppendixRandhavingacommonenclosure, e.g.,raceway,panel,junctionbox,have'eenadequately resolvedbybeingelectrically protected fromthepost-fire shutdown" circuitsofconcernbycircuitbreakers, fusesorsimilardevices.(8)Allassociated circuitsofconcernthathaveaseparation fromthefirearea'lessthanthatrequiredbySectionIII.G.2ofAppendixRandhaveaconnection tocircuitsofequipment whose'purious operation couldadversely affecttheshutdowncapability havebeenadequately resolvedbyappropriate actionpre-orpost-fire.

Page1-5 R/AEP/1,P1881.2.1ResultsofAnalsisTheresultsoftheanalysisconfirmtheadequacyoftheexistingfireprotection featuresin13of57fireareaswhencomparedagainstthespecificcriteriaofAppendixR,SectionIII.G.For18ofthe57fi'reareas,proposedmodifications including upgrading offirebarriers, installation ofsuppression anddetection systems,circuitmodifications, cablererouting, trayandconduitwrapping, andpipingmodifications willachievefirezoneandareacompliance withthespecificcriteriaofAppendixR,'ection III.G.Fortheremaining 26fireareas,similarmodifications areproposedbutverbatimcompliance withAppendixRFortheseareas,exemptions arerequested.

isnotachieved.

Theexemption requestsaremadeonthebasisofdetailedfirehazardsanalyseswhichconcludethatexistingfeatures, whencombinedwithadditional proposedfireprotection modifications, providefunctionally equivalent protection ofthepublichealthandsafety.Theexemption requestsarecontained inSection7.0ofthisreport.1.3ScoeofReortThisreportcontainsninesections.

Section2.0identifies thefireareasandfirezonesdeveloped tosupporttheAppendixRanalyses.

Thisincludesadetaileddiscussion ofthedetection Page1-6 R/AEP/1,P188andsuppression systemsandidentifies thefeaturesprovidedonazone-by-zone basis.Criteriaforestablishing fireareasandzonesarediscussed aswellastheprocessusedtodetermine the'ssociated firehazardseverity.

Theinformation contained inSection2generally presentstheD.C.Cookplantconfiguration ofeachfirezoneandfireareaattheendofthe1986Unit2refueling outage.Inaddition, thefireprotection featuresincludemodifications requiredforcompliance withAppendixRSectionIII.G,andgeneralplantimprovements initiated atthetimeofissueofthisreport.Section3.0providesadescription of-theactivefireprotection featuresincluding detection andsuppression systems1,atD.C..Cook.The,information, contained inSection.3generally presentstheD.C.Cookplantconfiguration ofeachfirezone'sactivefire,protection featuresat,theendofthe1986Unit2refueling outage.Inaddition, thefireprotection featuresincludemodifications requiredforcompliance withAppendixRSectionIII.G,andgeneralplantimprovements initiated atthetimeofissueofthisreport.Section4.0describes theinvestigatory processusedtoidentifysafetyfunctions, safe-shutdownsystems,'omponents andcircuits, andassociated circuitsofconcern.-Relatedassump-,tionsandconsiderations arealsodiscussed.

Theinformation, contained inthissectionpresentstheD.C.Cookplant.status/condition ofthesafeshutdownsystemsandcomponents attheendofthe1986Unit2refueling outage.Page1-7 R/AEP/1,P188Section5.0providesadiscussion ofthealternative shutdownsystemsprovidedbyuseoftheunaffected unit'ssafeshutdownsystems.Inaddition, Section5.0providesdetailed'esponses totherelevantquestions contained inGenericLetter81-12asclarified bytheNRCStaff'sclarifications datedMarch22,1982.Theinformation contained inthissectionpresentstheD.C.Cookplantstatus/condition ofthesafeshutdownsystems,components, andalternative shutdownmethodsidentified atthetimeoftheMarch1983submittal; however,thesystemflowdiagramsincludedinthissectionpresenttheD.C.Cookplant.;pipingconfiguration attheendofthe1986Unit2refueling outage.Section6.0addresses thecoldshutdownrepairsnecessary to.achievelong-term safeshutdown.

Thelevelsofdamagewhichmay~occurasaresult.ofhypothesized AppendixRfires,thenormalactionsandrepairsrequiredtoassure,thatcoldshutdowncanbe*achievedandmaintained within72hours,areidentified.

Theinformation contained inthissectionpresentstheD.C.Cookplantstatus/condition ofthesafeshutdownsystemsandcomponents attheendofthe1986Unit2refueling outage.Section.7.0,containsexempti,on requests.foreachfirearea/zone identified asnotbeingincompliance withSectionIII.GofAppendixR,andforareas/zones whereamodification wouldnotenhancefireprotection safety.Eachofthefireareas/zones isdescribed indetailandafirehazardsanalysis, Page1-8 R/AEP/1,F188including results,isprovided.

Exemptions foreachzonearealsoformallyrequested inthissectionandthedetailedtechnical basesforeachrequestareidentified attheconclusion ofeachanalysis.

Tablesandsketchessummarizing significant fireareainformation arealsoprovidedattheendofeachsubsection.

Exemptions requested inSubsections 7.2through7.12utilizetheD.C.-Cookplantcondition/configuration atthetimeoftheMarch1983submittal.

Theremaining twosubsections (7.13and7.14)arebasedontheD.C.Cookplan'tcondition/configura-tionatthetimeofJune1984.Insomeinstances, evaluations wereperformed, tojustifynotimplementing proposedmodifica-tions.Theseevaluations arepresented inSection9ofthisreportandarebasedontheconfiguration oftheD.C.Cookplantattheendofthe1986Unit2refueling outage;Inaddition, duetoon-goingeffortstocomplywith10CFR50AppendixRandsubsequent genericNRCclarifications, variousmodi'fications inconjunction withtheperformance ofengineering evaluations haveresultedinrevisions tovariousrequested exemptions.

Theserevisions arebasedontheexistingconfiguration oftheD.C.Cookplantattheendofthe1986Unit2refueling

.outage.Section8.0describes thosemodifications proposedatD.C.CookNuclearPlantwhichareconsidered necessary to:(1)Bringeachidentified firethespecificcriteriaof10III.G;or,zoneintocompliance withCFR50AppendixR,Section(2).Satisfycertainassumptions madeinSection7.0(e.g.,installation ofbarriers, thermalshields,conduitwrappings, etc.).Page1-9 R/AEP/1,P188Theinformation contained inthissectionpresentstheD.C.Cookplantconfiguration/status atthetimeoftheMarch1983submittal.

Section9.0providesacompilation offireareaboundaryevaluations whichhavebeenperformed since.theissuanceoftheMarch1983report.Theinformation contained inthissectionpresentstheD.C.Cookplantconfiguration/status attheendofthe1986Unit2refueling outage.1.4Definitions, AcronmsandAbbreviations 1.4.1Definitions ActiveComonent-acomponent usedtodirectlycontrol(start,regulateorstop)ashutdownorsupportfunction, e.g.,aflowcontrolvalve,'apump,oranormallyclosedisolation orstopvalve.AffectedUnit-asusedindiscussions ofalternative

shutdown, theunitwithoneormoreofitsnormalsafeshutdownsystemsrenderedinoperable, withoutconsidering thecrossconnectsinthefirezoneunderinvestigation.

Associated CircuitofConcern-safety-related andnon-safety-re'latedcablesthatareassociated withequipment whichisrequiredforshutdownandwhichhaveaseparation fromthefirearealessthanthatrequiredbySectionIII.G.2ofAppendixRto10CFR50,andwhichhaveeither:(1)Acommonpowersourcewiththeshutdownequipment andthepowersourceisnotelectrically protected fromthe.post-fire shutdowncircuitofconcernbycoordinated circuitbreakers, fusesorsimilardevices;orPage1-10 R/AEP/1,P188N(2)Aconnection ofcircuitsofequipment whosespuriousoperation willadversely affecttheshutdowncapability, e.g.,RHR/RCSisolation valves;or(3)Acommonenclosure, e.g.,raceway,panel,junction'box, withshutdowncablesandarenotelectrically protected fromthepost-fire shutdowncircuitsofconcernbycircuitbreakers, fusesorsimilardevicesorwillallowpropagation ofthefireintothecommonenclosure.

Automatic Detection

-adevicelocated(usuallyattheceiling)inazoneorareathattransmits asignaltoaremotelocation(usuallytheControlRoom)indicating anexcesspresenceofcombustion products.

Severaltypesofdetection devicesarecommonlyutilized, suchassmoke(photoelectric andionization),

heat(fixedtemperature, rateofrise,oracombination ofboth)andflamedetectors (ultraviolet,

)visible,orinfrared).

Automatic Suression-afixedpipingsystemofwaterorotherfireextinguishing agentautomatically actuatedwhenthepresenceofcombustion productsorheatexceedsthesetpointestablished forthesystemintheareainwhichitisinstalled.

ColdShutdown-reactoratzeropower,Kefflessthan0.99andRCStemperature atorbelow200F.FireArea-thatportionofabuildingorplantseparated fromotherareasbyboundaryfirebarrierswiththefirehazardineachareaevaluated todetermine barrierfireratingrequirements.

Pagel-ll R/AEP/1,P188FireBarrier-acontinuous membraneeitherverticalorhorizontal, suchasawallorfloor/ceiling

assembly, thathasaspecified fireresistance ratingtolimitthespread'ffirebetweenfireareasorsafeshutdowncomponents.

Thefirebarriersaredefinedtoberatedcommensurate withthehazardtowhichthebarrierisexposed.fire-fighting andwhoareequippedforandtrainedinthefightingoffires.assemblies havewithstood afireexposureasestablished inaccordance withtestprocedures ofnationally recognized testingorganizations.

propagation alongthelengthofcablesorpreventsspreading offiretonearbycombustibles withinagivenfireareaorfirezone.FireZone-asubdivision ofafireareadesignated asapotential firehazardzoneforconvenience ofanalysisanddesignoffiresuppression systems.FixedSuression-,anywaterorgaseoussuppression systemactivated eitherautomatically ormanually, butexcluding manualhosestationsandportablefireextinguishers.

HotShutdown-reactoratzeropower,Kefflessthan0.99andRCStemperature between350Fand200F.Page1-12 R/AEP/1,P188d,zeropower,Kefflessthan0.99andRCSaveragetemperature greaterthanorequalto350F.ManualSuression-afixedorportablemeansofcontrolling orextinguishing afirerequiring manualactuation and/orapplication.

SafeShutdownSstem-asafeshutdownsystemincludesallcomponents, panels,cables,raceways,

conduits, etc.,necessary forthesystemtoperformasafeshutdownfunction.

Asafeshutdownsystemisanyofthesystems(e.g.,Auxiliary Feedwater) whicharerequiredby10CFR50AppendixR.included.

Necessary supporting auxiliary systemsareSrinklerSstem-anetworkofpipingconnected toareliablewatersupplythatwilldistribute thewaterthroughout theareaprotected andwilldischarge thewaterthroughsprinklers insufficient quantitytoeithercontrolorextinguish afire.Thesystem,usuallyactivated byheat,includesacontrolling valveandadeviceforactuating analarmwhenthesystemisinoperation.

StandieandHoseSstem-afixedpipingsystemwithhoseoutlets,nozzleandhoseconnected toreliablewatersupplytoprovideeffective firehosestreamstospecificareasinsidethebuilding.

Page1-13 R/AEP/1,P188Unaffected Unit-asusedinthediscussions ofalternative

shutdown, theunitwhosenormalsafeshutdownsystemswillbeusedtoprovidealternative shutdownintheaffectedunit.WaterSraSstem-anetworkofpipingsimilartoasprinkler

~Isystemexceptthatitutilizesopen-head spraynozzlesandprotectsaspecifichazard.1.4.2AcronmsandAbbreviations AFW-Auxiliary Feedwater AOV-Air-Operated ValveBIT-BoronInjection TankCCW-Component CoolingWaterCST-Condensate StorageTankCVCS-ChemicalandVolumeControlSystemECCS-Emergency CoreCoolingSystemsEPS-Emergency PowerSystemESW-Essential ServiceWaterLSI-LocalShutdownIndication MCC-MotorControlCenterMOV-Motor-Operated ValveMS-MainSteamPORV-Power-Operated ReliefValveRCP-ReactorCoolantPumpRCS-ReactorCoolantSystemRHR-ResidualHeatRemovalRWST-Refueling WaterStorageTankSV-SafetyValvePage1-14 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLEIIFIREZONEISSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS lIFIREAREA:RHRANDCTSPUMPSAREA-ELEV.573'-:3HOURBOUNDARYII1II1AI18I1CII1DII1EIi1FI1G11H13613713BA138BI138C!182NONENONENONENONENONENONENONENONENONEEXISTINGNONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEER(c)EC(~)EC(~)ER(a.b)ER(a,b)EC(*)EC(4)ER(a.b)ER(a,b)EC(*)EC(~)EC(+)EC(4)-EC(1)(1).(2).(6).(9)(3).(5)(3).(5)(2).(3).(5)(2)~(3),(5)(3),(5)(3).(5)(2).(3).(5)(2).(3)~(5)NONENONENONE(5)NONEPAGE1OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS

=FIREAREACREENHOUSE SERVICE/OFFICE BUILDINGS ANDTURBINEBUILDING5UNITS1AND2WESTMAINSTEAMVALVEENCLOSURES:

1.5HOURBOUNDARY28307778798081828384858687888990919293NONENONENONENONENONENONENONENONENONENONENONENONENONE,NONENONENONENONENONENONENONENONENONENONEHONENONEEXISTINGNONENONENONENONEEXISTINGNONENONENONENONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEC(4)EC(+)EC(4)EC(*)EC(*)PC(b,c)EC(b)EC(*)EC(~)EC(')EC(b)PC(b,c)EC(*)EC(4)EC(*)EC(4)EC(4)EC(b)EC(*)EC(4)EC(4)(5)(5)(5)(5)(5)(1).(3).(4).(5)(5)(5)(5)(5)(5)(1),(3).(4).(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)FIREAREACONTINUED ONNEXTPAGEPAGE2OF16 I~14~

TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION

~AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS 9596979899100108109110112113114115124125126127128129130131NONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEEXISTINGNONENONENONENONEEXISTINGNONENONENONENONENONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGNONENONENONENONENONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGEC(+)EC(*)EC(*)EC(4)EC(4)EC(~)ER(b)ER(b)EC(b)EC(4)EC(b)EC(b)EC(b)EC(b)EC(4)EC(4)EC(4)EC(4)FC(i)EC(4).EC(*)EC(~')(5)(5)(5)(5)(5)(5)(5),(6)(5),(6)(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)(5)FIREAREACONTINUED ONNEXTPAGEPAGE3OF16 0TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONS 139140141142143NONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEEC(*)EC(4)EC(4)EC(4)EC(+)(5)(5)(5)(5)(5)IIFIREAREA:AUXILIARY BUILDINGELEV.633'ND650'NDFUELHANDLINGBUILDING:1.5HOURBOUNDARYI3I31I323536464950515269106107146NONENONENONENONENONEOP182182NONEEXISTING'ONEEXISTINGNONENONEEXISTINGEX1STINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGNONEEXISTINGNONENONENONENONENONE=NONENONENONENONENONENONEEC(~)EC(4)EC(g)EC(+)EC(4)EC(4)ER(4)ER(g)PC(g)ER(g)EC(9)EC(0)EC(~)PC.ERI(5)(5)(5)(5)(5)(5)(5).(6)(5).(6)(2),(4)~(5)(2),(4),(5).(6)l(5),(6)(5)(5)(5)PAGE4OF16 I

TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONE'ETECTIONAUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONS FIREAREA:SAMPLINGROOMELEV.587'":1.5HOURBOUNDARY41EXISTINGNONEEC(0)NONEFIREAREA:AUXILIARY BUILDINGEASTANDWESTELEV.587'":1.5HOUR80UNDARY6A6S182NONElil2EXISTINGNONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGPC(c)EC(*)PCSER(c)PC,ERPC.ER(1),(2)~(4).(5)(9)(5)(1).(2),.(4).(5)(6).(7)~(9)(1),(2),(5),(6)(1).(2).(4).(5)(6).(7)~(9)6164A64865A658NONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGEXISTINGEC(4)EC(4)EC(4)EC(0)FC(g)(5)(5)(5)(5)(5)FIREAREA:UNIT1QUADRANT1CABLETUNNELELEV.596'.5":3HOURBOUNDARY71EXISTINGEXISTINGPC,ER(g)(5),(6),(7)FIREAREA:UNIT1QUADRANT4CABLETUNNELELEV.596'.5":1.5HOURBOUNDARY81EXISTINGEXISTINGIPC.ER(0)(2).(6)PAGE5OF16

TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONS FIREAREA:UNIT1QUADRANT3NSELEV.596'.5":1.5HOURBOUNDARYAND3MCABLETUNNEL10EXISTINGEXISTINGEXISTINGEXISTINGEC(g)PC,ER(g)(5)(5).(6).(7)FIREAREA:UNIT1UADRANT35CABLETUNNELELEV.596'.5":I.sHOURBOUNDA0RY1EXISTINGEXISTINGER(9)IIFIREAREA:UNIT1QUADRANT2PIPINGTUNNELELEV.596'.5":1.5HOURBOUNDARYI121NONENONEPC,ER(g)IIFIREAREA:UNIT1DIESELOILPUMPROOMELEV.587'":3HOURBOUNDARYI13182EXISTINGEXISTINGEC(g)(6)(2),(5).(6)(5)IFIREAREA:UNIT1TRANSFORMER ROOMELEV.591'":1.5HOURBOUNDARY14NONENONEPC,ER(3).(5).(7)FIREAREA:UNIT1CDDIESELROOMELEV.587'-:1.5HOURBOUNDARY151EXISTINGEXISTINGPC(a)(1).(7)FIREAREA:UNIT1ABDIESELROOMELEV.587'":1.5HOURBOUNDARY16EXISTINGEXISTINGEC(9)NONEFIREAREA:UNIT1WESTAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY17ANONENONEEC(9)NONEPAGE6OF16 J

TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

ICFIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS FIREAREA:UNIT2WESTAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY178NONENONEEC(g)NONEFIREAREA:AUXILIARY FEEDWATER PUMPCORRIDOR:

3HOURBOUNDARY17CIL2NONENONEPC(g)(1)~(3).(4)FIREAREA:UNIT1EASTAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY170NONENONEEC(g)NONEFIREAREA:UNIT1TURBINEAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY17E1NONEEXISTINGEC(g)NONEFIREAREA:UNIT2TURBINEAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY17FNONEEXISTINGEC(9)NONE.FIREAREA:UNIT2EASTAUXILIARY FEEDWATER PUMPROOM:3HOURBOUNDARY17GNONENONEEC(g)NONEFIREAREA:UNIT2CDDIESELROOMELEV.587'":1.5HOURBOUNDARY18EXISTINGEXISTINGPC(g)(7)FIREAREA:UNIT2ABDIESELROOMELEV.587'":1.5HOURBOUNDARY192EXISTINGEXISTINGPC(a)PAGE7OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSNS OREVALUATIONS FIREAREA:UNIT2TRANSFORMER ROOMELEV.591'":1.5HOURBOUNDARY20NONENONEPC,ER(3),(5).(7)FIREAREA:UNIT2DIESELOILPUMPROOMELEV.587'":3HOURBOUNDARY21182EXISTINGEXISTINGEC(9)(5)FIREAREA:UNIT2QUADRANT2PIPINGTUNNELELEV.596'.5":1.5HOURBOUNDARY22NONENONEPC,ER(g)(2).(5),(6)FIREAREA:UNIT2QUADRANT3NCABLETUNNELELEV.596'.5":1.5HOURBOUNDARY23EXISTINGEXISTINGER(g)(6)!FIREAREA:UNIT2QUADRANT3MAND3SCABLETUNNELSELEV.596'.5-:1.5HOURBOUNDARY2425EXISTINGEXISTINGEXISTINGEXISTINGPC,ER(g)EG(9)(5),(6),(7)(5)FIREAREA:UNIT2QUADRANT4CABLETUNNELELEV.596'.5":1.5HOURBOUNDARYPCER(9)EXISTINGEXISTING26(2),(6)FIREAREA:UNIT2QUADRANT1CABLETUNNELELEV.596'.5":1.5HOURBOUNDARY27EXISTINGEXISTINGPC,ER(g)(6)~(7)PAGE8OF16 5

TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS FIREAREAATERPUMPSAREA:3HOURBOUNDARYESSENTIAL SERVICEW29A29B29E29C29029F29G'82NONENONENONENONENONENONENONENONENONENONENONENONENONENONEER(c)ERERERERER(3).(5)(3),(5)(3),(5)(2).(3),(5)(2).(3).(5)(2),(3).(5)(1).(2).(3).(5)FIREAREA:UNIT1EASTMAINSTEAMVALVEENCLOSURE ANDCONTRACTOR ACCESSCONTROLAREA1.5HOURBOUNDAR3333A33B105NONENONENONENONENONENONENONENONEEXISTINGEC(*)ERERER(2).(3)~(5)(3),(5).(6)(3).(5),(6)(5)IFIREAREAUNIT2EASTMAINSTEAMVALVEENCLOSURE AREA:1.5HOURBOUNDARY3434A34BNONENONENONENONENONENONEERFR(2).(3)(3),(5),(6)(3),(6)PAGE9OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS FIREAREA:AUXILIARY BUILDINGNORTHANDSOUTHELEV.609'":1.5HOURBOUNDARY374344N44S44A44B44C44D44E44F-44G44HNONE182182NONENONESPEXISTINGEXISTINGEXISTINGEXISTINGNONENONENONENONENONENONENONENONENONENONEEXISTINGEXISTINGNONENONENONENONENONENONENONENONEEC(*)EC(4)EC(4)EC(H)EC(H)EC(9)EC(0)EC(O)EC(H)ECPC,ERPC,ER(5)(5)(1),(2).(3).(4).(5),(6)~(7).(9)(1).(2)~(3).(4).(5)~(6)~(7),(8).(9)(5)(5)(5)(5)(5)(5)(5)(5)FIREAREA:UNIT1QUADRANT2CABLETUNNELELEV.612'":1.5HOURBOUNDARY381EXISTINGEXISTINGPC.ER(6).(7)IFIREAREA:UNIT2QUADRANT2CABLETUNNELELEV.612'":1.5HOURBOUNDARY39EXISTINGEXISTINGPC,ER(6),(7)PAGE10OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS IFIREAREA:UNIT1SWITCHGEAR ROOMSELEV.609'-:1.5HOURBOUNDARY40A40BEXISTINGEXISTINGEXISTINGEXISTINGECPCNONE(5),(7)FISAFETYSYSTEMSANDMCCROOMELEV.609'":1.5HOURBOUNDARY.411EXISTINGEXISTINGPCFIREAREA:UNIT1EMERGENCY POWERSYSTEMSAREAELEV.609'":1.5HOURBOUNDARY42A42842C.42DEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGPCPCPCPC(7)(7)(7)(7)FIREAREA:UNIT2ENGINEERED SAFETYSYSTEMSANDMCCROOMELEV.609'":1.5HOURBOUNDARY45EXISTINGEXISTINGPC(5).(7)-FIREAREA:UNIT2EMERGENCY POWERSYSTEMSAREAELEV.609'":1.5HOURBOUNDARY46A46B46C46DNONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEC(4)PCPCPC(7)(7)(7)FIREAREA:UNIT2SWITCHGEAR ROOMSELEV.609'":1.5HOURBOUNDARY47A47B~EXISTINGEXISTINGEXISTINGEXISTINGECPCNONE(5),(7)PAGE11OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE~'CONTINUED)

FIREZONESSS'QPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS FIREAREA:UNIT1CONTROLROOM:3HOURBOUNDARY53EXISTINGNONEPC,ER(2),(5),(7)FIREAREA:UNIT2CONTROLROOM:3HOURBOUNDARY54EXISTINGNONEPC;ER(2).(5),(7)IIFIREAREA:UNIT1SWITCHGEAR ROOMCABLEVAULT:3HOURBOUNDARYI551EXISTINGEXISTINGIFIREAREA:UNIT1AUXILIARY CABLEVAULT:1.5HOURBOUNDARYIi'61EXISTINGEXISTINGIFIREAREA:UNIT1CONTROLROOMCABLEVAULTANDHOTSHUTDOWNPANELAREA:1.5HOURBOUNDARYPCPC(5),(7)(5)(7)57144EXISTINGEXISTINGEXISTINGNONEPCPC.ER(5),(7)(2),('7)FIREAREA58145UNIT2CONTROLROOMCABLEVAULTANDHOEXIS(INGEXISTINGTSHUTDOWNPANELAREAEXISTINGNONE3HOURBOUNDARPCPC.ER(5).('7)(2).(7)FIREAREA:UNIT2AUIXILIARYCABLEVAULT:1.5HOURBOUNDARY592EXISTINGEXISTINGPC(5).(7)FIREAREA:UNIT2SWITCHGEAR ROOM.CABLEVAULT:3HOURBOUNDARY602EXISTINGEXISTINGPC(5).(7)PAGE12OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REOUIREDMODIFI-CATIONSSOREVALUATIONS FIREAREA:UNIT1CHARGINGPUMPSAREAELEV.587'":1HOURBOUNDARY62A62862CEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGPCPCPC(2)~(5),(7)'2),(5),(7)(2).(5),(7)FIREAREA:UNIT2CHARGINGPUMPSAREAELEV.587'":1HOURBOUNDARY63A63B63CEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGPCPCPC(2),(5),(7)(2).(5).(7)(2).(5)~(7)FIREAREA:UNIT1CONTAINMENT:

3HOURBOUNDARY6667101103118120122132134SPNONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEPC(d)PC(<j)EC(d)EC(d)EC(<j)EC(0)PC(<j)PC(j')EC(*)EC(*)(7)(7)NONENONENONENONE(7)(7)NONENONEPAGE13OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

FIREZONESSSEQPTORCABLEWITHINZONEDETECTION AUTOMATIC SUPPRESSION APPLICABLE APPENDIXRPROVISIONS III.G.2III.G.3REOUIREDMODIFI-CATIONSOREVALUATIONS FIREAREA:CONTROLROOMHVACANDCOMPUTERAREA:3HOURBOUNDARY70717273NONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGNONEEC(*)EC(+)EC(*)EC(*)(5)NONENONE(5)FIREAREA:UNIT2CONTAINMENT:

3HOURBOUNDARY747576102104.119121123133135SPNONENONE-NONENONENONENONENONENONENONENONENONENONENONENONENONENONESNONENONENONENONENONENONEPC(d)PC(d)EC(d)EC(d)EC(d)EC(9)PC(d)PC(f)EC(4)EC(~)(7)(7)NONENONENONENONE(7)(7)NONENONEFIREAREA:UNIT1TANKAREAPIPETUNNEL:3HOURBOUNDARY116NONENONENONEEC(4)(5)FIREAREA:UNIT2TANKAREAPIPETUNNEL:3HOURBOUNDARY117NONENONENONEEC(*)(5)PAGE14OF16 0TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

LEGEND:NONE182OPECPCERSP,NOSSSCOMPONENTS ORCABLESINTHEZONE/NOMODIFICATIONS REQUIREDFORCOMPLIANCE UNIT1SSSCOMPONENTS ORCABLESINTHEZONEUNIT2SSSCOMPONENTS ORCABLESINTHEZONEBOTHUNITSSSSCOMPONENTS ORCABLESINTHEZONEOPTIONALSHUTDOWNCOMPONENTS AND/ORCABLESONLYINTHEZONEEXISTINGCOMPLIANCE PROPOSEOCOMPLIANCE EXEMPTION REQUESTSPURIOUSCABLESONLY.SEETABLE4-3TYPEOFIII.G.2'OMPLIANCE STRATEGY(a)III.G.2-(a)COMPLIANCE

-SEPARATION OFCABLESANDEQUIPMENT ANDASSOCIATED NONSAFETY-RELATED CIRCUITSOFREDUNDANT TRAINSBYAFIREBARRIERHAVINGATHREE-HOUR RATING.(b)III.G.2(b)COMPLIANCE

-SEPARATION OFCABLESANOEQUIPMENT ANOASSOCIATEO NONSAFETY-RELATED CIRCUITSOFREDUNDANT TRAINSBYAHORIZONTAL DISTANCEOFMORETHAN20FEETWITHNOINTERVENING COMBUSTIBLES ORFIREHAZARDS.INADDITION, FIREDETECTORS ANDANAUTOMATIC FIRESUPPRESSION SYSTEMSHALLBEINSTALLED INTHEFIREAREA.(c)III.G.2(c)COMPLIANCE

-ENCLOSURE OFCABLEANDEQUIPMENT ANDASSOCIATED NONSAFETY-RELATED CIRCUITSOFONEREDUNDANT TRAININAFIREBARRIERHAVINGAONE-HOURRATING.INADDITION, FIREDETECTORS ANDANAUTOMATIC FIRESUPPRESSION SYSTEMSHALLBEINSTALLED INTHEFIREAREA.(d)(e)-III.G.2(d)COMPLIANCE

-SEPARATION OFCABLESANDEQUIPMENT ANDASSOCIATED NONSAFETY-RELATED

CIRCUITS, OFREDUNDANT TRAINSBYAHORIZONTAL DISTANCEOFMORETHAN20FEETWITHNOINTERVENING COMBUSTIBLES ORFIREHAZARDS.III.G.2(e)COMPLIANCE

-INSTALLATION OEFIREDETECTORS ANDANAUTOMATIC FIRESUPPRESSION SYSTEMINTHEFIREAREA.(f)III.G.2(f)COMPLIANCE

-SEPARATION'OF CABLESANDEQUIPMENT ANDASSOCIATEO NONSAFETY"RELATED CIRCUITSOFREDUNDANT TRAINSBYANON-COMBUSTIBLE RADIANTENERGYSHIELD.(g)III.G.1COMPLIANCE ISPROVIDEDSINCENOREDUNDANT SAFESHUTDOWNEQUIPMENT ISINTHEAREA(b)III.GCOMPLIANCE ISPROVIDEDSINCETHESAFESHUTDOWNEQUIPMENT INTHEAREAISPASSIVEANDISNOTREQUIREDTOOPERATF.(~')III.GCOMPLIANCE ISPROVIDEDSINCENOSAFESHUTDOWNCABLESORCOMPONENTS AREINTHEFIREZONE.PAGE15OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCE TABLE(CONTINUED)

TYPEOFMODIFICATION REQUIREDFORCOMPLIANCE (1)RACEWAYPROTECTION (I.e.,WRAPPINGOFCABLETRAYORCONDUIT)(2)AREABOUNDARYMODIFICATION (3).DETECTION MODIFICATION (6)(7)(8)SUPPRESSION MODIFICATION AREABOUNDARYEVALUATION AREABOUNDARYEXEMPTION ELECTRICAL CIRCUITAND/ORMECHANICAL PIPINGMODIFICATION RATEDBARRIERADDITIONWITHINAFiREZONEBOUNDARY~MODIFICATION (STAIRWAY SUPPRESSION)

PAGE16OF16 2.IDENTIFICATION OFFIREAREASThissectionprovidesdetailedinformation onthecriteriaandmethodologies usedtodevelopfireareaandzonedefinitions forD.C.Cook.Inaddition, themethodology utilizedtodevelopequivalent fireseverities foreachfireareaarediscussed.

Theresultsoftheseactivities arepresented asTables2-1and2-2andFigures2.1through2.11.Theinformation contained inthissectiongenerally presentstheD.C.Cookplantconfiguration ofeachfirezoneandfireareaattheendofthe1986Unit2refueling outage.Thefireprotection featuresincludemodifications requiredforcompliance withAppendixRSectionIII.G,aswellasgeneralplantimprovements initiated atthetimeofissueofthisreport.OnJanuary31,1977,theIndianaandMichiganElectricCompany(IBM)responded toAppendixAofBranchTechnical Position(BTP)APCSB9.5-1forUnits1and2attheD.C.CookNuclearPlant.Thegeneralguidelines usedfortheplantlayoutoffirezoneswere:(1)'Identify safety-related systemsorequipment; (2)Isolatesafety-related systemsorequipment fromunacceptable firehazardsbyspatialseparation orbytheprovision offirebarriersorenclosures; (3)Providefiredetection and/orsuppression equipment tominimizetheeffectsofafire;and(4)Employcombinations oftheabove,actingtocomplement orbackuponeanother.Page2-1 Thesegeneralcriteriawereincorporated intotheMarch31,1977,FireHazardsAnalysisforUnits1and2oftheD.C.CookPlant.Atotalof104fireszoneswereidentified inthe1977FireHazardsAnalysisforD.C.Cook.Inthatresponse, roomsorareaswereidentified asseparatefirezonesiftheycontained combustible materials, safety-related equipment orcablesand/orwereadjacenttozonescontaining suchequipment.

Foreachofthe104firezonesidentified inthe1977FireHazardsAnalysis, thecombustible/fuel loadingintermsofBtu'spersquarefootoffloorareawasdetermined.

Thecombustible materials considered intheanalysiswerecableinsulation, plastic,liquidhydrocarbons, flammable gases,andcarbonaceous productssuchaswood,paperandcharcoal.

Thephysicalbarriersseparating firezonesidentified inthe1977FireHazardsAnalysiswereconstructed ofheavyreinforced concreteconstruction h'avingaminimumfireratingofthreehours.Theonlyexceptions tothisconstruction areconcreteblockwallswiththeminimumratingof1-1/2hours,whichhadbeenaddedforcompartmentalization.

Artificial Uboundaries, suchasopenwalkwaysvaryingfromsixfeetinwidthtotheentirelengthorwidthofthezone,separated anumberofzonesinboththeTurbineandAuxiliary Buildings.

IntheTurbineBuilding, theboundaries weredetermined bythelocationofsuppression and/ordetection systems.IntheAuxiliary Page2-2

Building, thelocationwasdependent onthephysicalcharacteristics oftheelevation.

Theartificial boundaries typically werelocatedwhereelevatorshaftsorwallsreducedsizeoftheopeningsbetweenzonestolargeopenwalkways.

2.2Identification ofFireZonesThegeneralguidelines usedforestablishing firezonesintheIndianaandMichiganElectricCompany's responsetoAppendixAformedthebasisforthefirezoneandareaactivities performed inresponsetoAppendixR.Inresponding totheseparation criteriaofAppendixR,SectionIII.G.2,astudywasperformed toidentifylocations withintheplantthat,ifrequired, couldbedefinedasfireareasorcouldbeusedasarriersduringtheIII.G;2(a) separat'ion analysis.

ThestudyThesewereidentified inthesubsequent analysisbyaletterfollowing thepreviouszonedefinition (e.g.,40A).Insomecases,thesesubdivided zonesweresubsequently foundtoconstitute avalidfirearea(e.g.,l7A).Inothercases,thesubzoneswerecombinedduringthecableseparation analysisforanalytical convenience (e.g.,62A,B,C).

Ingeneral,thoseAppendixAfirezonesthatwouldqualifyasafireareaunderthecriteriaofAppendixRwithoutmodifications weredesignated asfireareas.Systemsanalyseswereperformed onthefireareastoidentifypotential conflicts withtheseparation criteriaofAppendixR.Wherenoconflicts rbresultedinsubdivisions ofcertainpreviously definedzones.Page2-3 arose,andwherenosafeshutdownequipment wasidentified inthearea,compliance withAppendixRwasidentified.

NoattemptsweremadetocombinethefireareasthatdocomplywithAppendix' withadjacentfireareasorzonesinRevision0totheMarch1983submittal.

However,duringthereevaluation effort,somefireareasoriginally incompliance werecombinedandevaluated forimpacttosafeshutdown.

Anotherstudywasperformed thatide'ntified additional plantlocations notpreviously tabulated inthe1977analysis.

Theseplantareaswereincorporated intothefirezonelistinginRevision0totheMarch1983submittal andarenumberedasFireZones105through128.Manyofthesezonesweresubsequently foundtocontainnosafeshutdownequipment orcables.Sincethepreviousstudydidnotidentifyallplantareas,anadditional studywasperformed forthisreportperthecriteriaofGenericLetter83-33toaccurately identifyallplantlocations.

As'a,result,FireZones129through146wereidentified, someofwhichweresubdivided bylettersintomultiplezones(e.g.,138A).Theseplantareaswerealsoincorporated intothefirezonelisting.Thenewlyidenti.fied firezones,withtheexception ofFireZones144and145,containnosafeshutdowncablesorcomponents.

Thesenewfirezoneswerecombinedwithadjacentfireareastoformlargerfireareas.Firehazardsanalysesandsafeshutdownsystemevaluations wereperformed toensurethattherewouldbePage2-4 noimpactoncompliance forthesefireareas(seeSections7and9).OnlyFireZones144and145,whichwereoriginally includedaspartofFireZones54and53,respectively, containsafe'hutdownequipment orcables.However,thesetwozonesaretheUnit1andUnit2hotshutdownpanels,whichwereproposedtobeenclosedbythree-hour barriersinRevision0totheMarch1983AppendixRsubmittal.

Anartificial firezonewasalsoidentified duringthecourseofthisstudy.Thiszone,ELSH,ismadeupofthetwoelevatorshafts(passenger andfreight)connecting levelsoftheAuxiliary Building.

Thedooropeningstotheshaftsareprotected by'B'abelfiredoors.Thisartificial zonewascreatedduetothedifficulties, associated withidentifying averticalshaftinhorizontal fireareaboundaries.

Itexistsforconvenience purposesonlyandisnotidentified elsewhere inthisreport.Basedonthesestudies,atotalof198individual andIsubdivided fire'ones (e.g.,40A)havebeenidentified.

Table2-1isacompilation ofallthefirezonesidentified inthisanalysis.

2.3Identification ofFireAreasAfireareaisdefinedasthatportionofaplant,separated fromotherareasbyratedboundaryfirebarriers.

Theratingoftthebarriersisdetermined bythefire.hazardwithineachareaandisrequiredtobecommensurate withthefirehazardtowhichPage2-5 thebarrierisexposed.Firebarriers, doors,dampers,andpenetration sealsarenotnecessarily requiredtobethree-hour-rated.Theratingisdependent uponthefirehazardstowhich'hey couldbeexposed.AtD.C.Cook,theconstruction ofwalls,floors,andceilingsistypically ofheavy,reinforced concretewithaninherentfireratingofatleastthreehours.Inadditiontothisconstruction, thedefinition ofthefireareaboundaries mustalsoaddresstheprotection providedforthedoors,dampers,stairways, hatches,andotherpenetrations inthefireareaboundaryconstruction.

DoorsanddampersatD.C.Cook.aretypically eitherl-l/2orthree-hour fire-rated when.theyformpartofabarrierseparating fireareas.Evaluations and/orexemption requestsareprovidedwherefire'-rated protection doesnotexist.Ratingsalsomayexistfordoorsthatformzoneboundaries withinanareaorarepartofexteriorwalls.AtD.C.Cook,noexternalfirehazardsexistalongexteriorplantwallsthatcontainunrateddoors.Someconditions existwhereventilation systemsexitintoratedenclosures andproceedthroughotherareasintheplanttotheexterior.

Rateddampersdonotexistinthesesituations.

Thesetypesofventilation systemsexistinZones40A,40B,4l,42A,42D,45,46A,46D,47Aand47B(Emergency PowerSystemsArea).Section-3discusses furthertheacceptable impactoftheseopeningsonthesezone'sgaseoussuppression systems.Page2-6 Stairways connecting fireareaswithintheAuxiliary Buildingwillbeprovidedwithautomatic watersuppression systemsaroundtheperimeter ofthestairopenings.

Thesesystemsformwatercurtainsthatinhibitthepassageofhotgases,flamesandproductsofcombustion totheareasabove.Basedonthelowareacombustible loadingofeachleveloftheAuxiliary Building(lessthantenminutesforanyfirearea),thistypeofwatersuppression protection providesanadequatebarrierthatpreventsfirepropagation toadjoining levels.Thisprotection permitseachleveloftheAuxiliary Buildingtobetreatedasaseparatefirearea.Unratedmetalhatches,wheretheyformpartofafireareaboundary, havebeenevaluated andfoundtoprovidealevelofprotection appropriate totheareahazard,inconjunction withtheexistingfirepr'otection featuresforthatarea.Largeconcreteplugsareprovidedinthefloor/ceiling assemblies betweenfireareasoftheAuxiliary'uilding forequipment removal.Wheninplace,theseplugsprovideanequivalent levelofprotection tothatrequi.red forthebarrier.Otherpenetrations andopeningsinbarriersseparating fireareasthatcontainsafe-shutdown equipment areeithersealedtoprovidealeveloffireprotection commensurate withthefirehazardinthefireareaorevaluations areperformed tojustifytheexistingconfiguration.

Page'2-7 Penetrations andopeningsmaynotbesealedwhereareawallsformanaturaldivisionbetweenplantbuildings, theareasdonotcontainsafeshutdownequipment, andthecombustibl'e loadingin'hevicinityofthewallisextremely low.Suchunsealedpenetrations andopeningsinbarrierstypically existeitherasnaturalventilation flowpaths ortofacilitate otheraspectsofplantandbuildingdesign(waterdrainagepaths,roompressurereliefforhypothesized pipebreaks,seismicgaps,etc.).Ingeneral,artificial boundaries (i.e.,largeopenspaces)donotexistbetweendefinedfireareas..However,thisisnotalwaysthecase.Forexample,anevaluation isperformed tojustifytheladderopeningconnecting eachunit'smainsteamvalveenclosure (FireZones33and34forUnits1and2,respectively) withtheRW,CSandPWtankareapipetunnel(Fire,Areas116and117forUnits1and2,respectively),

whichthenconnectswiththequadrant2pipingtunnel(FireAreas12and22forUnits1and2,respectively) viaanopenwalkway.Artificial boundaries doexistbetweenfirezonesorsub-zones withinafirearea.'hese boundaries occurinsomecasesasaresultofthecombination ofpreviously definedzonesintolargerfireareas.Inothercases,theywerecreatedtoequipment separation, analysis.

Infacilitate the,cableandallinstances, theseartificial boundaries wererecognized assuch,.andtheseparation analysisperformed betweensuchzonesusedtheIII.G.220-ftand/orone-hourbarrierprovisions.

Page2-8 Aninherent'featureoftheD.C.Cookelectrical systemdesignis'heextensive, useofembeddedco'nduit.

Althoughsuchembeddedconduitprincipally containspowercabling,somecontrolandinstrument circuitsmayalsoberoutedwithinembeddedconduits.

Embeddedconduittypically islocatedinconcretefloorfillslabs.Thesefillslabs,ofvaryingthickness, arepoureddirectlyonthefloor'sstructural concretepads.Embeddedconduitsalsoexistincertainverticalwallsections.

Suchfloorandwallconduitsareembeddedwithaminimumoffourinchesofconcretecover.Insomecases,theconduitmayexistundertwotothreefeetofconcrete.

Inallcases,duetotheinherentfireratingsassociated withsuchconstruction andtheseparation available betweenredundant divisionconduitswithintheslabs, cablessoembeddedarenotconsidered aspartofanyidentified firezoneuntiltheyexittheconcrete.

Basedonthesecriteria, theMarch1983submittal identified 80fireareasatD.C.Cook.Asaresultofidentifying previously unidentified plantlocations, fireareaboundaries havechanged.Insomecases,fireareasidentified separately intheMarch1983submittal werecombinedintolargerfireareas.Inothercases,thenewlyidentified firezoneswerecombinedwithadjacentfireareasforminglargerfireareas.Wherepenetrations infireareaboundaries wereidentified ashavingnoimpactonredundant safeshutdowncapabilities, technical evaluations wereperformed justifying theconfigurations (seePage2-9 Section9).Thesefireareas,whichmayconsistofindividual firezonesoraconsolidation ofzones,arelistedin'able2-2andareshowngraphically inFigures2.1through2.11onafloor-'y-floor (planandsectional views)basis.Atotalof57fireareashavebeenidentified inthismanner.Theautomatic detection andsuppression systems,whicharedescribed inSection3,arealsolistedinTable2-2.Table2-2alsoidentifies floorareasandcombustible loadingsonafirezonebyfirezonebasis,withtotalfloorareasandcombustible loadingsprovidedforeachfirearea.Eachsolidhorizontal lineinTable2-2delineates oneofthe57:fireareasutilizedinthisanalysis.

Wherezonesandsub-zones havebeencombinedintoasinglefirearea,thezonesaregroupedtogetherinthistableandareseparated fromotherfireareasbysolidhorizontal lines.Unlessspecifically indicated; theratingoftheboundaryfirebarriersforeachfireareaindicated inthistabledescribes theminimumfireratingofthecomponents thatformtheboundaries ofthearea.Figures2.1through2.11identifythelocationoffireareaandfirezoneboundaries astheyexistatD.C.Cook.Bluelinesinthesefiguresidentifyfireareaboundaries, whileorangelinesidentifyfirezoneboundaries thatdonotformaportionoffireareaboundaries.

Figures2.1through2.11identifytheentiretyoffireareaboundaries; theydonotsolelyidentifythosebarriersthatseparateinteriorfireareas.Assuch,exteriorwalls'andwallsbelowgradethatdonotabutadjacentPage2-10 interiorfireareashavealsobeenidentified withbluelinesasfireareaboundaries.

Thesefireareasareidentified fortheperformance ofAppendixRseparation analysis.

Whereonlyonetrainofsafeshutdownsystemsislocatedwithinafireareawithjustifiable

barriers, thenthecriteriaofAppendixRSectionIII.G.laremet.Althoughnotspecifically identified ineitherTable2-2orFigures2.1through2.11,three-hour-rated barriersseparating redundant safeshutdowncomponents locatedinthesamefireareahavebeenidentified.

Thesebarriers, whilenotresulting inthecreationofseparatefireareas,havebeenutilizedtoachievecompliance withSectionIII.G.2(a) ofAppendixR.TheIII.G.2(a) barriersatD.C.Cookthathavebeenutilizedareidentified asfollows:(1)TheT-shapedwallseparating theUnit1RHRpumpsinFireZone1CandFireZone1Donthe573ftelevation oftheAuxiliary Building; (2)TheT-shapedwallseparating theUnit2RHRpumpsinFireZone1GandFireZonelHonthe573ftelevation oftheAuxiliary Building; (3)Thewallseparating Unit1ESWpumpsinFireZone29AandFireZone29BfromtheUnit2ESWpumpsinFireZone29CandFireZone29D;and(4)Thebarrierseparating theUnit1CCWpumpsfromtheUnit2CCWpumpsandthespareCCWpumpfromtheUnit1andUnit2CCWpumps.2.4Procedure forUdatinCombustible LoadinSinceth'esubmittal ofthe1977FireHazardsAnalysis, additional cablinghasbeeninstalled atD.C.Cook.InordertoPage2-11 addressthisincreaseincombustible loadingduetoadditional cableinsulation, previously developed zonecablecombustible loadingswereincreased byanaveragevaluebasedonthetotal'mount ofadditional cableinstalled atD.C..-Cook.Areviewofdocumentation revealedthatthetotalnumberoffeetofcableatD.C.Cookincreased by"approximately 25~between1977and1982.A25~increaseincombustible

'loadingassociated withcableinsulation wastherefore appliedtothefirezonesidentified inthe1977FireHazardsAnalysisforD.C.Cook.Inordert'oaccountforadditional amountsofcableinstalled since1982,anadditional 10%increaseintotalfeetofinstalled cablehas,'been appliedtothosefirezonescontaining cableinsulation.

Between1982andtheendof1985,theactualincreasehasbeenlessthan5%.The254and10<increases areconservative innaturebecausetheincreases includeallcablesusedintheplant,whetherincabletraysorconduit.Since1977,'ables inconduitandtraysinsomefireareas/zones havebeenwrappedwithaone-hourfirebarriertoachievetheappropriate separation criteria.

Pilasters inthedieselgenerator roomshavebeenprotected withathree-hour wrap.Asaconservative measure,thewrappedcableshavenotbeendeletedfromthecablecombustible loadinginthefireareas/zones wheretheyexist.Areasurveyswereconducted in1982andagainin1986todetermine ifanyadditional substantial combustibles hadbeenaddedtothevariouszones.Page2-12 Theequivalent fireseveritythenwasestimated throughastrictinterpretation ofthecriteriapresented inTable6-8Aofthe14thEditionoftheFireProtection Handbook.

Thistable,whichwasalsoutilizedtoestimatethefireseverityinthe1977FireHazardsAnalysis, relatestheBtu/ftofcombustible materialwiththeestimated minutesoffireseveritybasedontheareaunderthestandardtime-temperature curve.Thevaluescontained withinthistablearebasedonmaterials withanaverageheatofcombustion of8000Btu/lb.Toobtainanaccurateequivalent fireseverityformaterials withheatsofcombustion greaterorlessthan8000Btu/lb,th'eBtu/ftreferenced inTable6-8Amustbemultiplied bytheratiooftheheatofcombustion oftheactualmaterials withinthezone(cableinsulation, liquidhydrocarbons,

plastics, etc.)dividedbytheheatofcombustion (8000Btu/lb)utilizedinthetable.Thisanalysishasbeenperformed forea'chfireareacontained withinthisreportwiththeequivalent fireseverities referenced inTable2-2.Table2-2ofthisreportcorrelates toTable2-2oftheMarch1983submittal, buthasbeenreformatted andincludesadditional information.

2.5SulementalInformation toSuorttheContention thatCablesinConduitEmbeddedinConcretearenotPartoftheFireAreaSection2.3statesthatcableslocatedinconduitembeddedinconcretewalls,floors,orceilingswerenotconsidered aspartofanyfirezoneuntiltheyexitedtheconcrete.

ThePage2-13 supplemental information contained inthissectionprovidesthebasisforthistechnical determination.

Thetechnical basissubstantiating thatfourinchesof'oncretecoverprovidesadequateprotection forembeddedcablesconsiders thefollowing:

(1)Thefirehazardand,leveloffiredetection

.andsuppression thatexistforeachofthevariousareasofconcern;(2)TheNFPAratingsforconcretefirebarriers; (3)Thedifference betweenconfiguration andtheconfigurations atDonaldC.cable;theNFPAfirebarrier,wall,floor,ceilingCookthatcontainembedded(4)Thedifference betweentheNFPAfirebarriercoldsidetemperature criteriaandthetemperature failurecriteriafortypicalnuclearplantcables.Inaccordance withtheNFPA's14thEditionoftheFireProtection

Handbook, Table6-7GofSection6concerning buildingconstruction anddesigncriteriaindicates thatfornormalweightconcrete, whichisthepredominant typeofconcreteatD.C.Cook,Jaminimumsolidthickness of4.2to4.5inchesresultsinatwo-hourfirerating,whileaone-hourfireratingrequiresonly2.8to3inchesofconcrete.

Therangeoftheseratingsisbasedonthetwotypesofconcreteaggregate thatcouldpotentially beused.Althoughthiswouldindicatethatal-l/2to2-hourratingisachievedbyasimplefour-inch concretesection,directuseoftheseratingsfortheactualconfiguration oftheconcretePage2-14 sectionscontaining embeddedcableatD.C.Cookshouldnotbemade.Figure2.0-adepictsthetypicalconstruction forwhichtheNFPAratingsdirectlyapply,whileFigure2.0-bindicates thetypicalconstruction ofconcreteatD.C.Cookcontaining embeddedcables.Itimmediately becomesapparent, recognizing thetypicalvaluesforthermalconductivity andheatcapacityofconcrete, thattheadditional barriermassbetweentheembeddedcablesandthecoldsidewillfunctionasaheatsink,loweringtheactualin-walltemperature attheembeddedcabletoanumbersubstantially lowerthanthe322FusedforthestandardNFPAbarrierrating.The322FvalueintheNFPAratingsisbasedonalimitingfactorof250Fplusanassumedambienttemperature of72Fonthecoldsideoftheconcretesection.Inordertoquantifythiscomparison, aFiniteDifference ThermalComputerModelwasusedthatassumedaconstantfiresideheatfluxofthree-hour durationandmeasuredthetemperature variations atthefour-inch embedment forvarioussectionthicknesses.

Asabasecase,afour-inch concretesectionwasusedwithincidentheatfluxesvarieduntila322Fcoldsidetemperature wasachieved.

Oncedetermined, thisbasecaseheatfluxwasappliedfor6.0,8.0and12.0inchconcretesectionsforathree-hour duration.

Inallcases,thecoldsidewallwasPage2-15 assumedadiabatic.

Themodelresultslistedbelowindicatethat,atadistancefromthehotsideoffourinches,theconcretetemperatures decreasedramatically aswallthickness increases.

TotalSectionThickness (in.)Tem.at4in.at3hours(F)4.06.08.012.0322216197196Furthersupportfortheconclusion thatembeddedcabledoesnotdegradeiscontained inareportentitled, "AStudyofDamageability

-'of'lectrical Cablein'.Simulated FireEnvironments,"

preparedbyFactoryMutualResearchCorporation ipMarch1981fortheElectricPowerResearchInstitute.

Thereport"indicates thatthesurfacetemperature for11cablesamples(varyingfromPE/PVCtoEPR/Hypalon),

atthepointwhereinsulation degradation begins,rangesfrom567Fto993F.Thetemperature atwhichinsulation degradation beginsishigherthanthetemperatures associated withthefailurecriteriaof322FforNFPA-rated fire'barriers.

Whenacomparison ismadebetweentheonsetofinsulation degradation (567Fto993F)andthelikelythermalprofilesforconcretesectionstypicalforD.C.Cookbarriers, itisevidentthatnocableinsulation degradation shouldoccurforembeddedcables.Page2-16 IndianaandMichiganElectricCompany's technical conclusion isthataminimumconcretecoveroffourinchesprotecting embeddedconduitandcableprovidessufficient protection tojustifytheexclusion ofembeddedconduitandcableinanyfireareauntilitexitstheconcretesection.2.6Identification ofMaximumAllowable Combustible LoadinJustification forsomeoftheexemptions andevaluations isbasedonthequantityofcombustible loadingpresentinthearea.Forthepurposeofcontrolling theincreaseoffixedand/ortran-sientcombustible loadingduetomaintenance orfutureplantmodifications, amaximumallowable

'ombustible loadingvalueisidentified onlyforthoseareasinvolvedinanexemption oreval-uation.ThesevaluesarelistedinTable2-3.Theplantloca-tions(areas)identified onthistablemayconsistofasinglefirezone,asinglefire,area,oragroupoffirezonesthatdonotmakeafirearea.Unlessspecifically listed,thevaluesin,Table2-3aretot'alsoffixedandtransient corhbustible loadingsintheareas.ThefirezonesinTable2-'3aregroupedtogetherbyfirearea,similartothoselistedinTablesl-land2-2.Page2-17 FireZone1A1BlC1DlE1F1G1H6A*6NTABLE2-1FIREZONEIDENTIFICATION TABLEIdentification Auxiliary Building-El573ft0in.-bothunitsContainment SprayPumpEast,Auxiliary Building-El573ft0in.-Unit1Containment SprayPumpWest,Auxiliary Building-El573ft'in.-Unit1ResidualHeatRemovalPumpEast,Auxiliary Building-El573ft0in.-Unit1ResidualHeatRemovalPumpWest,Auxiliary Building-El573ft0in.-Unit1Containment SprayPumpEast,Auxiliary Building-El573ft0in.-Unit2Containment SprayPumpWest,Auxiliary Building-El573ft0in.-Unit2ResidualHeatRemovalEast,Auxiliary Building-El573ft0in.-Unit2ResidualHeatRemovalWest,Auxiliary Building-El573ft0in.-Unit2PumpBayTurbineBuilding-El569ft6in.-bothunitsDrumming/Drum Storage-El587ft0in.SamplingRoomAuxiliary Building-El587ft0in.Auxiliary Building-El587ft0in.(EastEnd)-bothunitsAuxiliary BuildingPipeTunnel-El601ft0in.andEl609ft0in.-bothunitsAuxiliary Building-El587ft0in.(NorthsectionoftheWestEnd)-Unit1Page1of10 TABLE2-1(continued)

FireZone6M6S101213151617A17B17C17D17E17F17G182021Identification Auxiliary Building-El587ft0in.(MiddlesectionoftheWestEnd)-bothunitsAuxiliary Building-El587ft0in.(SouthsectionoftheWestEnd)-Unit2Quadrant1CableTunnel-El596ft3-1/2in.-Unit1Quadrant4CableTunnel-El596ft3-1/2in.-Unit1Quadrant3NCableTunnel-El596ft3-1/2in.-Unit1Quadrant3MCableTunnel-El596ft3-1/2in.-Unit1Quadrant3SCableTunnel-El596ft3-1/2in.-Unit1Quadrant2PipingTunnel-El591ft0in.-Unit1DieselOilPumpRoom-El587ft0in.-Unit1Transformer Room-El591ft0in.-Unit1lCDDieselGenerator Room-El587ft0in.-Unit1lABDieselGenerator Room-El587ft0in.-Unit1WestAux.FeedPumpRoom-El591ft0in'.-Unit1WestAux.FeedPumpRoom-El591ft0in.-Unit2CorridortoAux.FeedPumpRooms-El591ft0in.bothunitsEastAux.FeedPumpRoom-El591ft0in.-Unit1TurbineAux.FeedPumpRoom-El591ft0in.-Unit1TurbineAux.FeedPumpRoom-El591ft0in.-Unit2EastAux.FeedPumpRoom-El591ft0in.-Unit22CDDieselGenerator Room-El587ft0in.-Unit22ABDieselGenerator Room-El587ft0in.-Unit2Transformer Room-El591ft0in.-Unit2DieselOilPumpRoom-El587ft0in-Unit2Page2of10 TABLE2-1(continued)

FireZone2223242526272829A29B29C29D29E29F29G3031323333A33BIdentification Quadrant2PipingTunnel-El591ft0in.-Unit2Quadrant3NCableTunnel-El596ft3-1/2in.-Unit2'uadrant 3MCableTunnel-El596ft3-1/2in.-Unit2Quadrant3SCableTunnel-El596ft3-1/2in.-Unit2Quadrant4CableTunnel-El596ft3-1/2in.-Unit2Quadrant1CableTunnel-El596ft3-1/2in.-Unit2DieselFirePumpRoom-El591ft0in.-Unit1Essential ServiceWaterPumpPP-lE-El591ft0in.Unit1Essential ServiceWaterPumpPP-1W-El591ft0in.Unit1Essential ServiceWaterPumpPP-2E-El591ft0in.Unit2Essential ServiceWaterPumpPP-2W-El591ft0in.Unit2MotorControlCenterForESWPumps-El591ft0in.Unit1MotorControlCenterForESWPumps-El591ft0in.Unit2ScreenHouseAuxiliary MCCRoom-El575ft0in.bothunitsUnit2DieselFirePumpRoom-El591ft0in.ConcreteMixingBuilding/Drumming AreaEl609ft0in.CaskHandlingArea-El609ft0in.-bothunitsMainSteamValveEnclosure, East-El612ft0in.Unit1MainSteamLineArea,East-El612ft0in.-Unit1NonEssential ServiceWaterValveArea,WestEl612ft0in.-Unit1Page3of10 TABLE2-1(continued)

FireZone3434A34B353637383940A40B4142A42B42C42D4344N44A44BIdentification MainSteamValveEnclosure, East-El612ft0in.Unit2MainSteamLineArea,East-El612ft0in.-Unit2NonEssential ServiceWaterValveArea,West-El612ft0in.-Unit2Instrument Calibration Room-El609ft0in.SpentFuelHeatExchanger PitPumpRoom-El609ft0in.ValveGallery-El617ft0in.-bothunitsQuadrant2Penetration CableTunnel-El612ft0in.Unit1Quadrant2Penetration CableTunnel-El612ft0in.Unit24kVABSwitchgear Room-El609ft6in.-Unit14kVCDSwitchgear Room-El609ft6in.-Unit1Engineered SafetySystem6MCCRoom-El609ft6in(6Underfloor)

-Unit1EPSTransformer Room-El609ft6in.-Unit1EPSControlRodDriveRoom-El609ft6in.-Unit1EPSMotorControlRoom-El609ft6in.-Unit1EPS(AB)BatteryRoom-El609ft6in.-Unit1AccessControlArea-El609ft0in.-bothunitsAuxiliary BuildingNorth-El609ft0in.-bothunitsAuxiliary BuildingSouth-El609ft0in.-bothunitsContainment SprayHeatExchanger Room518E,Auxilia'ry Building-El609ft0in.-Unit1Containment SprayHeatExchanger Room518W,Auxiliary Building-El609ft0in.-Unit1Page4of10 TABLE2-1(continued)

FireZone44C44E44F44G44H46A46B46C46D47A47B495051525354Identification ResidualHeatRemovalHeatExchanger Room517E,Auxiliary Building-El609ft0in.-Unit1ResidualHeatRemovalHeatExchanger Roomgl7W,Auxiliary Building-El609ft0in.-Unit1Containment SprayHeatExchanger Room518E,Auxiliary Building-El609ft0in.-Unit2Containment SprayHeatExchanger Room518W,Auxiliary Building-El609ft0in.-Unit2ResidualHeatRemovalHeatExchanger Roomgl7E,Auxiliary Building-El609ft0in.-Unit2ResidualHeatRemovalHeatExchanger Roomgl7W,Auxiliary Building-El609ft0in.-Unit2Engineered SafetySystem&MCCRoom-El609ft6in.(6Underfloor)

-Unit2EPSTransformer Room-El609ft6in.-Unit2EPSControlRodDriveRoom-El609ft6in.-Unit2EPSMotorControlRoom-El609ft6in.-Unit2EPS(AB)BatteryRoom-El609ft6in.-Unit24kVABSwitchgear Room-El609ft6in.-Unit24kVCDSwitchgear Room-El609ft6in.-Unit2NewFuelStorageRoom-El633ft0in.HVACVestibule

-El633ft0in.-Unit1HVACVestibule

-El633ft0in.-Unit2Auxiliary Building-El633ft0in.(EastEnd)-bothunitsAuxiliary Building-El633ft0in.(WestEnd)-bothunitsUnit1ControlRoom-El633ft0in.Unit2ControlRoom-El633ft0in.Page5of10 TABLE2-1(continued)

Zone5556575859606162A62B62C63A63B63C64A64B65A65B66676869Identification Switchgear RoomCableVault-El625ft10in.-Unit1Auxiliary CableVault-El620ft6in.-Unit1ControlRoomCableVault-El624ft0in.-Unit1ControlRoomCableVault-El624ft0in.-Unit2Auxiliary CableVault-El622ft6in.-Unit2Switchgear RoomCableVault-El625ft10in.-Unit2SprayAdditiveTankRoom-El587ft0in.-bothunitsReciprocating ChargingPump-El587ft0in.-Unit1Centrifugal ChargingPump-El587ft0in.-Unit1Centrifugal ChargingPump-El587ft0in.-Unit1Reciprocating ChargingPump-El587ft0in.-Unit2Centrifugal ChargingPump-El587ft0in.-Unit2Centrifugal ChargingPump-El587ft0in.-Unit2SafetyInjection PumpNorth-El587ft0in.-Unit1SafetyInjection PumpSouth-El587ft0in.-Unit1SafetyInjection PumpSouth-El587ft0in.-Unit2SafetyInjection PumpNorth-El587ft0in.-Unit2Containment PipingAnnulus-El598ft9-3/8in.Unit1Containment LowerVolume-El598ft9-3/8in.-Unit1Containment UpperVolume-El650ft0in.-Unit1Auxiliary Building-El633ft0in.and650ft0in.bothunits7071ControlRoomHVACEquipment

-El650Unit1ComputerRoom-El650ft0ift0in.-Unit1n.72Unit2ComputerRoom-El650ft0in.Page6of10 TABLE2-1(continued)

FireZone73747677Identification ControlRoomHVACEquipment

-El650ft0in.-Unit2'ontainment PipingAnnulus-El598ft9-3/8in.Unit2Containment LowerVolume-El598ft9-3/8in.-Unit2Containment UpperVolume-El650ft0in.-Unit2WeldingShopUnit1-El591ft0in.-TurbineBuilding78HeatingBoilerRoomBuildingUnit1-El591ft0in.-Turbine7980818283858687888990919293TurbineRoomUnit1(N.E.Portion)-El591ft0in.TurbineRoomUnit1(S.E.Portion)-El591ft0in.TurbineRoomUnit1(S.W.Portion)-El591ft0in.TurbineRoomUnit1(N.W.Portion)-El591ft0in.TurbineRoomUnit1LubeOilRoom-El591ft0in.TurbineRoomUnit2(N.E.Portion)-El591ft0in.TurbineRoomUnit2(S.E.Portion)-El591ft0in.TurbineRoomUnit2(S.W.Portion)-El591ft0in.TurbineRoomUnit2(N.W.Portion)-El591ft0in.TurbineRoomUnit2LubeOilRoom-El591ft0in.TurbineRoomUnit2Misc.OilRoom-El591ft0in.TurbineRoomUnit1(N.E.Portion)-El609ft0in.TurbineRoomUnit1(S.E.Portion)-El609ft0in.TurbineRoomUnit1(S.W.Portion)-El609ft0in.TurbineRoomUnit1(N.W.Portion)-El609ft0in.TurbineRoomUnit1Aux.HeatingBoilerEl609ft0in.Page7of10 TABLE2-1(continued)

.FireZone9596979899100101102103104105106107108109110112113114115Identification TurbineRoomUnit1TurbineOilTankRoom-El605ftllin.TurbineRoomUnit2(N.E.Portion)-El609ft0in.TurbineRoomUnit2(S.E.Portion)-El609ft0in.TurbineRoomUnit2(S.W.Portion)-El609ft0in.TurbineRoomUnit2(N.W.Portion)-El609ft0in.TurbineRoomUnit2TurbineOilTankRoom-El609ft0in.Containment 1Accumulator Enclosure West-El612ft0in.*Containment 2Accumulator Enclosure West-El612ft0in.ReactorHeadEnclosure

-Unit1-El567ft2in.ReactorHeadEnclosure

-Unit2-El567ft2in.Contractor AccessControlBuilding-El612ft0in.Aux.F.W.BatteryRoomgl-Auxiliary Building-El633ft0in.-Unit1Aux.F.W.BatteryRoomg2-El633ft0in.-Unit2WestSteamValveEnclosure

-Unit1-El635ftWestSteamValveEnclosure

-Unit2-El635ftMainSteamAccessway

-Unit1-El587ft0in.MainSteamAccessway

-Unit2-El587ft0in.Essential ServiceWaterPipeTunnel-Unit1El570ft6in.Essential ServiceWaterPipeTunnel-Unit2El570ft6in.Essential ServiceWaterPipeTunnel-Unit1-El587ft0in.Essential ServiceWaterPipeTunnel-Unit2El587ft0in.Page8of10 TABLE2-1(continued)

FireZone116117118119120121122123124125126127128129*130*131*132*133*134*135*Identification RW,CS,PWTankAreaPipeTunnel-Unit1El593ft0in.RW,CS,PWTankAreaPipeTunnel-Unit2-El593ft0in.Containment RegenHeatExchanger Room-Unit1El612ft0in.IContainment RegenHeatExchanger Room-Unit2El612ft0in.Containment 1Accumulator Enclosure East-El612ft0in.Containment 2Accumulator Enclosure East-El612ft0in.Containment 1Instrumentation Room-Unit1El612ft0in.Containment 2Instrumentation Room-Unit2El612ft0in.UPSInverterRoomSecurity-El591ft0in.CASSecurity-El633ft0in.TechSupportCenter-El633ft0in.-bothunitsTSC,UPSInverterandBatteryRooms-El650ft0in.bothunitsUPSBatteryRoomSecurity-El591ft0in.Unit1TurbineDeck-El633ft0in.Unit2TurbineDeck-El633ft0in.ServiceandOfficeBuildings Unit1IceCondenser

-El640ft0in.Unit2IceCondenser

-El640ft6in.Unit1ReactorVesselPit-El567ft0in.Unit2ReactorVesselPit-El567ft0in.Page9of10 TABLE2-1(continued)

FireZone136*137*138A*138B*138C*139*140*141*142*Identification Unit1PipeTunnel-El573ft0in.Unit2PipeTunnel-El573ft0in.CVCSHold-upTankAreaNorth-El562ft0in.CVCSHold-upTankAreaMiddle-El562ft0in.CVCSHold-upTankAreaSouth-El562ft0in.TurbineRoomSump-El570ft9in.TurbineCausticPumpandTankArea-El569ft0in.TurbinePumpPit-El571ft0in.Screenhouse

-El591ft0in.'-bothunits143*WaterIntakeandDischarge System-El546ft0bothunitsin.144*145*146*Unit1HotShutdownPanelEnclosure

-El633ft0in.Unit2HotShutdownPanelEnclosure

-El633ft0in.Auxiliary BuildingLoadingPlatform-El609ft0in.*Areasoftheplantthatwerepreviously notidentified asfirezonesinthe1983AppendixRsubmittal Page10of10 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS~IIIIFIREAREA*EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFT2FIGURENUMBERRHRANDCTSPUMPS~AREAIE.573'-0"(SEENOTE26)11A187IONIZATION 2IONIZATION 2IONIZATION DRYPILOTPREACTION SPRINKLERS(SEENOTES1AND42)NONE(SEENOTE42)NONE(SEENOTE42)1-1/2(SEENOTES1,2,25,38,39,53AND56)6.0'.33.68,1721,7904,8155,3093243242.5,2.62.5,2.62.5,2.61C101E2IONIZA>ION2IONIZATION2IONIZATION NONEI(SEENOTE42)IIIINONEII(SEENOTE42)IIIINONEI(SEENOTE42)II(THISFIREAREAISCONT5.19.2INUEDONNEXTPAGE)6,87712.3094,7742842843242.5,2.62.2,2.5,2.62.6EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE1OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS'IRE AREA*EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFT2FIGURENUMBCR1F1G1H136137138A138B138C2IONIZATION 2IONIZATION 2IONIZATIONINONEIIINONEIIINONENONEINONENONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)TOTAL3.75.60.60.92.94,9137,3037,5938041,1544,0793242842843173172,0252,0252,02514,4502.62.2,2.62.2,2.62.2,2.62.2,2.5,2.62.2,2.62.2,2.6EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE2OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS>>IIIjFIREAREA~EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFT2FIGURENUMBERj(SEENOTE2lIjNONEi1TURBINEBUILDING, SCREENHOUSE, SERVICE/OFFICE aBUILDINGS ANDUNITS1AND2r'ESTMAINSTEAMjVALVEENCLOSURES S26827)jNONE1-1/2(SEENOTES9,11,12,28,33,34,40,41,58,59,61AND62)2.22,9139,3422.1,2.4.2.5,2.628307778798081NONENONENONEINONE4IONIZATIONIFORD.G.IRAMP/CORRIDOR NONENONEWETPIPESPRINKLERS WETPIPESPRINKLERSWETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS 90.290.24.14.05.93.02.3119,922119,9225,4545,4197,9833,9803,1744004002,0882,16011,14014,4'1812,8122.72.72.1,2.72.1,2.72.1,2.4,2.72.1,2.4,2.5,2.72.1,2.4.2.5,2.7(THISFIREAREAISCONTINUED 0GE)NNEXTPAEACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE3OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS>>FIREAREA'EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFT2FIGURENUMBER8283848586878889909192NONE1THERMISTOR NONE4IONIZAIONIFORD.G.tRAMP/CORRIDOR INONENONE1THERMISTOR NONENONENONEINONEWETPIPESPRINKLERS AUTOMATIC C02,WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS AUTOMATIC C02,WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERSWETPIPESPRINKLERS 8.03HR2.44.120.06.43HR3HR5.319.412.210,6512,687,458 3,2575,59926,6328,6454,252,164 602,6627,03825,87516,38611,21289714,824.12,54912,83312,8341,07280010,99815,40013,8252.1,2.4,2.72.1,2.4,2.72.1,2.5,2.72.1,2.72.1,2.72.1,2.5,2.72.1,2.5,2.72.1,2.72.1,2.4,2.82.1,2.4.2.5,2.82.1,2.4,2.5,2.8(THISFIREAREAISCONTINUED ONNEXTPAGE)4EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE4OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS~IIIsFIREAREA*I93949596979899100108109110EXISTINGDETECTION NONENONE1THERMISTOR NONENONENONEINONEI1THERMISTOR INONEIINONEIINONENONEEXISTINGSUPPRESSION WETPIPESPRINKLERS WETPIPESPRINKLERS AUTOMATIC C02,WETPIPESPRINKLERS WETPIPESPRINKLERSWETPIPESPRINKLERS WETPIPESPRINKLERS WETPIPESPRINKLERS AUTOMATIC C02,WETPIPESPRINKLERS NONENONENONENONEMINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES) 4.92.3>>3HR23.72.48.728.43HR7.611.80.60.6FIRELOADBTU/FT26,6273,0912,600,084 31,5473,20711,57237,7133,314,428 10,18715,872803838AREAFT12,70589059015,30012,52414,08013,1391,1028978971,7761,776FIGURENUMBER2.1,2.82.1,2.82.1,2.82.1,2.5,2.82.1,2.82.1,2.82.1,2.5,2.82.1,2.5,2.82.2,2.4,2.10,2.112.2,2.10,2.112.2,2.4,2.7,2.8,2.92.2,2.7,2.8,2.9(THISFIREAREAISCONTINUED ONNEXTPAGE)EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE5OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS'FIREAREA~I112113114EXISTINGDETECTION NONENONENONEEXISTINGSUPPRESSION NONENONENONEMINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES) 0.20.1FIRELOADBTU/FT3293,250142ARE)FT1,2291,229539FIGURENUMBER2.4.2.5.2.62.5,2.62',2.7115NONENONE539.2.2,2.71241251261272IONIZATION4IONIZATION (2UNDERFLOOR)COMPUTERROOM4IONIZATION CONSOLEROOM4IONIZATION (2UNDERFLOOR)CONSULTATION ROOMS4IONIZATION (2PERRM)IREMAINING TECHSUPPORTCENTER3IONIZATION UPS,INVERTERROOMI2IONIZATIONUPSBATTERYROOM2IONIZATION AUTOMATIC HALON1301AUTOMATIC HALON1301AUTOMATIC HALON1301AUTOMATIC HALON1301WETPIPESPRINKLER SYSTEMNONEAUTOMATIC HALON1301NONE68.09.890,40013,0514002252,4501,0352.72.102.1,2.102.2,2.4,2.11(THISFIREAREAISCONTINUED ONNEXTPAGE)EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE6OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREASFIREAREA>>EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREAIBOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBER128129NONETHERMISTORS FORTURBINENONEMANUALWATERSPRAYFORTURBINEIUNDERLAG-GINGANDMAN-UALDRYCHEM"ICALFORTUR-BINEBEARING31.43.541,8374,96344053,2792.72.1,2.4,2.10,2.11I130131EL.649'-6"(EXTENSION)

EL.636'-6"(EXTENSION)

CHEMLAB4IONIZATION THERMISTDRSFORTURBINEQCVAULT2IONIZATION REMAINING IFLOORAREA51IONIZATION 44IONIZATION NONEMANUALWATERSPRAYFORTURBINEUNDERLAG-GINGANDMAN-UALDRYCHEM-ICALFORTUR-BINEBEARINGAUTOMATIC HALON1301NONEWETPIPESPRINKLERSFORMECH.EQUIP.RM.ONLY1.71282.528170.30253,13583,3282.5,2.10.2.112.1,2.7,2.8,2.10(THISFIREAREAISCONTINUED ONNEXTPAGE)4EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE7OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS~IjFIREAREA+IIEL.'33'-0" IIEL.623'-6-(EXTENSION)

EL.621'-0"EXISTINGDETECTION 11IONIZATION 26IONIZATION QARECORDVAULT1IONIZATION EXISTINGSUPPRESSION WETPIPESPRINKLERSFORSERVICEBLDGWETPIPE5PRINKLERS FORLOCKERROOMAUTOMATIC C02MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBEREL.609'-0"(EXTENSION)

EL.609'-0"EL.595'-0-TELEPHONE EQUIP.ROOM1IONIZATION OTHERFLOORAREAS10IONIZATION 12IONIZATION 10HEAT19IONIZATION 14HEATFILEROOM,CHARTANDRECORDS3IONIZATION AUTOMATIC C02WETPIPESPRINKLERSFORSERVICEBLDGANDOFFICEBLDGHVACEQUIP.ROOMWETPIPESPRINKLERSWETPIPESPRINKLERSFORSERVICEBLDG,MISCOFFICEBLDGAREASAUTOMATIC C02(THISFIREAREAISCONTINUED ONNEXTPAGE)EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE8OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS'IRE AREASIEXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTUIFTAREAFTFIGURENUMBEREL.595'-0"SECURITYEQUIP.ROOM2IONIZATION REMAINING FLOORAREAS10IONIZATION 3HEATAUTOMATIC HALON1301WETPIPESPRINKLERS FORSERVICEBLDG8"OFFICEBLDGMECH.EQUIP.ROOMS.DELUGESYSTEMFOROFFICEBLDGGAS8BOTTLESTORAGE,8ROAD-WAYOVERHANGIELEVATORLOBBY~(EXTENSION) 3IONIZATION NONE139140141142143NONENONENONENONENONENONENONENONENONENONE2.61.519.03,6982,19625,6521,1648881,61118,60899.8002.1,2.5,2.62.1,2.4,2.62.1,2.5,2.62.4,2.5.2.7,2.82.1,2.4.2.5~2.6TOTAL41.855,776555,579EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE9OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS>>IFIREAREA~IEXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERIAUXILIARY BLDGEL.633'650'ANDFUELHANDLING!BUILDINGf(SEENOTES26827)I3III31322IONIZATION (SEENOTE18)NONE6IONIZATION DRYPILOTPREACTION SPRINKLER SYSTEM(SEENOTE18)NONEDRYPILOTPREACTION SPRINKLERS 1-1/2(SEENOTES1,2,19,30,31,37,39,40,53,57,60,61AND64)18.017.44,86124,01923,3112,6579865,5232.3,2.5,2.72.3,2.82.3,2.5,2.8,2.10,2.1135364849NONENONENONENONE7IONIZATION, THERMISTORSFORCHARCOALFILTERUNITS12-HV-AFX-1 1-HV-AES-1 1-HV-AES-2 MANUALWATERSPRAYFORCHARCOALFILTERUNITS4IONIZATION NONE38.22.765.250,7923,71986,7253231,6241,6503,2002.82.3,2.82.3,2.102.2,2.3,2.10507IONIZATION, THERMISTORS IFORCHARCOALFILTERUNITS2-HV-AES-1 2-HV-AES-2 MANUALWATERSPRAYFORCHARCOALFILTERUNITS33.244,3093,2002.2,2.3,2.10(THISFIREAREAISCONTINUED ONNEXTPAGE)EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE10OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA*EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFT2FIGURENUMBER515269I9IONIZATION(SEENOTE55)17IONIZATION 28IONIZATION, THERMISTORS FORCHARCOALFILTERUNITS1-HV-CPR-1 2-HV-CPR-1 DRYPILOTPREACTION SPRINKLERS (SEENOTES1~3)DRYPILOTPREACTIONSPRINKLER S(SEENOTES1,3)MANUALWATERSPRAYFORCHARCOALFILTERUNITS16.27.92.221,65010,7172,9985.38611,08517~9142.2,2.3~2.5,2.10222425210 2.2.2.3.2.5,2.8,2.9,2.10,2.111061HEAT(FIXEDTEMP/RATE OFRISE)NONE12.616,77019222,2.101071461HEAT(FIXEDTEMP/RATE OFRISE)INONENONENONE10.849.114,37565,3562246262.3,2.102.8ISAMPLINGROOMEL.587'-0"3IONIZATION NONETOTAL1-1/212.912.517,28316,75354,5901,0252.5,2.74EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE11OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS>>FIREAREA*EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBERAUXILIARY BUILDINGI EASTANDWESTEL.587'-0-(SEENOTES26827)I514IONIZATION, 1THERMISTOR FORCHARCOALFILTERUNIT12-HV-SATFUF (SEENOTE55)DRYPILOTPREACTION SPRINKLERS (SEENOTES1,3)MANUALWATERSPRAYFORCHARCOALFILTERUNIT1-1/2(SEENOTES1,2,4,35,39.53'6,57.60AND63)8.511'298,6352.2,2.3,2.5,2.72.96A6M6N6S6164AINONEII6IONIZATION (SEENOTE55)4IONIZATION I(SEENOTE55)4IONIZATION (SEENOTE55)2IONIZATION I2IONIZATION NONEDRYPILOTPREACTIONSPRINKLERS (SEENOTE3)DRYPILOTPREACTION SPRINKLERS (SEENOTES1,3)DRYPILOTPREACTION SPRINKLERS (SEENOTES1,3)NONEDRYPILOTPREACTIONSPRINKLERS 0.18.216.46.710.49.414311,02221,8929,03413,84612'4210,8906,0954,2126,0951,0003092.2,2.3.2.5,2.92.2,2.7,2.92.2,2.5,2.7,2.92.2.2.7,2.92.3,2.5,2.72.2,2.7(THISFIREAREAISCONTINUED ONNEXTPAGE)EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE12OF35

TABLE2-2FIRE.PROTECTION FEATURESFORFIREAREAS*FIREAREA~EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTARE)FTFIGURENUMBER64865A6582IONIZATION 2IONIZATION 2IONIZATION DRYPILOTPREACTIONSPRINKLERSDRYPILOTPREACTION SPRINKLERS DRYPILOTPREACTIONSPRINKLERS TOTAL8.08.69.710,73911,51813,0088,94728830928838,1212.2.2.5~2.72.2,2.72'2-7iUNIT1QUADRANT1iCABLETUNNELIEL'96Ž3.5" I74IONIZATION 3INFRAREDAUTOMATIC C023(SEENOTES40AND63)87.5116,629960/2.3~2.7,2.8IIUNIT1QUADRANT4ICABLETUNNELIEL.596'"3.5" 86IONIZATION 5INFRAREDAUTOMATIC COZ1-1/2(SEENOTE40)23.130,8412,0502.3,2.4.2.7UNIT1QUADRANT3NAND3MCABLETUNNELS(SEENOTE27)9104IONIZATION 3INFRARED4IONIZATION 3INFRAREDAUTOMATIC C02AUTOMATIC COZ1-1/2(SEENOTES23AND40)TOTAL54.878.368.972,856104,25091,6125398001,3392-2.2-I2.2,2.7EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE13OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA~EXISTINGDETECTION MINIMUMRATINGOFFIREEXISTINGAREASUPPRESSION IBOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERIIIUNIT1QUADRANT3SICABLETUNNELI113IONIZATION 3INFRAREDAUTOMATIC C021-1/2(SEENOTE40)19.726,3448402.2,2.7!UNIT1QUADRANT2IPIPINGTUNNELI12NONENONE1-1/2(SEENOTES2,5AND40)I1.21,7227,8122.2,2.3,2.4,2.6,2.7,2.8,2.9,2.10UNIT1DIESELOILIPUMPROOMIII13IIIUNIT1TRANSFORMER ROOMI1THERMISTOR AUTOMATIC C023(SEENOTE6)19.125,4696212.2,2.71412IONIZATION NONE1-1/2(SEENOTE43)I(SEENOTE6)0.81,0562,0722'.2.7IUNIT1CDDIESELROOMEL.587'-0"152THERMISTORS AUTOMATIC C021-1/2127.0169,0142,1562.2,2.4,2.7UNIT1ABDIESELROOMEL.587'-0"162THERMISTORS AUTOMATIC COZ1-1/2124.0165,0282.2332.2,2.4,2.7EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE14OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS>>FIREAREASIUNIT1WESTAFWPUMPROOM17AIUNIT2WESTAFWPUMPROOMmI178IIAFWPUMPCORRIDOR17CIsUNIT1EASTAFWPUMPROOM17DIIUNIT1TURBINE-DRIVENAFWPUMPROOM17EEXISTINGDETECTION NONENONE2IONIZATION INONENONEEXISTINGSUPPRESSION NONENONEWETPIPESPRINKLERSNONEWETPIPESPRINKLERS'INIMUM RATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES) 0.60.64.90.80.8FIRELOADBTU/FT8878936,6971,0041,034AREAFT2252252328219219FIGURENUMBER2.5,2.72.5,2.72.5,2.72.1,2:5,2.72.1,2.7UNIT2TURBINE-DRIVENAFWPUMPROOM17FNONEWETPIPESPRINKLER S3(SEENOTE41)0.81,0342192.1,2.5,'.7IUNIT2EASTAFW1PUMPROOMII17GINONENONE0.81,0042192.1,2.5,2.7EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE15OF35 TA-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA*IIIUNIT2CDDIESELiROOMEL.587'-0"18EXISTINGDETECTION 2THERMISTORS EXISTINGSUPPRESSION AUTOMATIC C02MINIMUMRATINGOFFIREAREABOUNDARIES 1-1/2EQUIVALENT FIRESEVERITY(MINUTES) 122.2FIRELOADBTU/FT162,647AREAFT22,250FIGURENUMBER2.2,2.5,2.7UNIT2ABDIESELROOMEL.587'-0"192THERMISTORS AUTOMATIC C021-1/2122.2162,6562,2502.2,2.7IUNIT2TRANSFORMER ROOMII20II12IONIZATION NONE1-1/2(SEENOTE44)(SEENOTE7)1.01,5032,0722IIUNIT2DIESELOILPUMPROOM21lIIUNIT2QUADRANT2PIPINGTUNNEL221THERMISTOR INONEAUTOMATIC COZNONE3(SEENOTE7)1-1/2(SEENOTES2,8AND40)21.00.628,0631,0225618,4602',2'2.2,2.3,2.6,2,7,2.8,2.9,2.10UNIT2QUADRANT3NCABLETUNNEL233IONIZATION 3INFRAREDAUTOMATIC C021-1/2(SEENOTE40)21.528'168402',2.7EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIRFZPNFS.PAGE16OF35 TAB-2FIREPROTECTION FEATURESFORFIREAREAS*CFIREAREA~EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT IFIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFTFIGURENUMBERUNIT2QUADRANTI3MAND3SCABLEjTUNNELS(SEENOTE27)24254IONIZATION 3INFRARED4IONIZATION 3INFRAREDIAUTOMATIC C02AUTOMATIC C021-1/2(SEENOTES24AND40)58.745.978,08361,1328005672'.2.72'TOTAL53.371,0511,367UNIT2QUADRANT4CABLETUNNELEL.596'-3.5" 266IONIZATION 5INFRAREDAUTOMATIC C021-1/2(SEENOTE40)15.921,0862,7462.7UNIT2QUADRANT1CABLETUNNELEL.596'-3.5" 274IONIZATION 3INFRAREDAUTOMATIC C02363.9(SEENOTE40)I85,0091,0562.3,2.7.2.8EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE17OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*IIIIFIREAREAiEXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT IFIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFTFIGURENUMBERESSENTIAL SERVICEWATERPUMPSAREAI29A29829C29029E29F29G4IONIZATION 4IONIZATION 4IONIZATION 4IONIZATION 1IONIZATION 1IONIZATION 4IONIZATION NONE(SEENOTE45)NONE(SEENOTE45)NONE(SEENOTE46)lNONE(SEENOTE46)NONE(SEENOTE45)NONE(SEENOTE46)NONE(SEENOTE47)3(SEENOTES9AND54)9.78.42.23.03.08.812,9212,'11711,2672,8903,9743,97411,85833240233240292921,5442.5,2.72.5,2.72.72.7=2.72.72.5,2.6TOTAL6.79,0983,196'EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE18OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA%'XISTING DETECTION EXISTINGSUPPRESSION IMINIMUMRATINGOFFIREAREABOUNDARIES EQUiVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERIUNIT1EASTMAINSTEAMVALVEENCLOSURE ANDCONTRACTORS ACCESSCONTROL~AREA(SEENOTE27)3333A24IONIZATION4INFRARED3IONIZATION, 10INFRARED, 1THERMISTOR FORCHARCOALFILTERUNIT1HV-CIPX-1 NONE(SEENOTE48)MANUALWATERSPRAYFORCHARCOALFILTERUNIT(SEENOTE48)1-1/2(SEENOTES5,36,40AND58)12.06.716,1189,1291,0403,2162.4,2.8.2.10,2.112.2,2.3,2.83382IONIZATION INONE(SEENOTE48)0.22366002.2,2.8105NONEWETPIPESPRINKLERS11.715.6192,3802.2,2.4.2.8TOTAL8.511,5307,236EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE19OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS'IRE AREA*EXISTINGDETECTION MINIMUMRATINGOFFIREEXISTINGAREASUPPRESSION iBOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERUNI-2EASTMAINSTEAMVALVEENCLOSURE 3434A34824IONIZATION 4INFRARED3IONIZATION

~10INFRARED, 1THERMISTOR FORCHARCOALFILTERUNIT2-HV-CIPX-12IONIZATION NONE(SEENOTE49)MANUAL'LVATERSPRAYFORCHARCOALFILTERUNIT(SEENOTE49)NONE(SEENOTE49)1-1/2(SEENOTESB,I40AND59)TOTAL8.33.14.34.311,2874,2045.7355,9091,0403,2166004,8562.8.2.10,2.112.2.2.3.2.82.2.2.8EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEYIITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE20OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS%FIREAREAR'XISTING DETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFTFIGURENUMBERAUXILIARY BUILDINGI

  • NORTHANDSOUTHEL.609'-0"(SEENOTE27)373IONIZATION (SEENOTE55)NONE1-1/2(SEENOTES1,2.4,"11,12,13,25'8,30,32.38,39,50,53AND64)2,7302.3,2.5.2.84344A44844C44044E44F44G44H44N24IONIZATION NONEINONEIINONENONENONENONENONENONENONEINONENONENONEIINONENONENONENONENONE19IONIZATION IDRYPILOT(SEENOTE55)PREACTION SPRINKLERS (SEENOTES1.3)55.84.44.74.33.44.75.210.91.836.674,3615,8546,2695,7424,6036,2696,99914,5712,36048,6504,630220220270270220220270270F5802.2.2.4.2.82.5,2.8.2.102.5~2.8.2.102.5,2.8.2.102.2,2.8.2.102.8.2.102.8,2.102.8~2.102.8,2.102.2.2.5,2.8,2.944S20IONIZATION (SEENOTE55)DRYPILOTPREACTION SPRINKLERS (SEENOTES1.3,10)TOTAL14.225.819,19234,4829,36026,2612.2.2.8EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE21OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA4'XISTING DETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERUNIT1QUADRANT2CABLETUNNELEL.612'-0"I38IUNIT2QUADRANT2CABLETUNNELEL.612'-0"!397IONIZATION 4INFRARED7IONIZATION 4INFRAREDAUTOMATIC C02AUTOMATIC C021-1/2(SEENOTE40)1-1/2(SEENOTE40)31.023.041,28830;6222,6502,6672.2,2.3,2.8~2.92.2,2.3,2.8,2.9IUNIT14IcvSWITCHGEAR ROOMSIEL.609'-0"I40AI4082IONIZATION 3INFRARED2IONIZATION 3INFRAREDAUTOMATIC C02AUTOMATIC C021-1/2(SEENOTE14)15.513.620,61618,1441,4761,4402.2~2.82.2,2.8TOTAL14.619,3942,916IUNIT1ENGINEERED ISAFETYSYSTEMS!ANDMCCROOMEL.609'-0"41II9IONIZATION(3UNDERFLOOR)5INFRARED(2UNDERFLOOR)AUTOMATIC C021-1/2(SEENOTE15)20.727,6143.0962.2,2.4,2.8EACHFIREAREAIS"SEPARATED BYASOLIDHORIZONTAL LINEVIITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE22OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREASFIREAREAR'EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFTFIGURENUMBERUNIT1EMERGENCY POWERSYSTEMSAREAEL.609'-0")I!42AI42842C2IONIZATION 2INFRARED2IONIZATION 1INFRARED3IONIZATION 2INFRAREDAUTOMATIC C02AUTOMATIC C02AUTOMATIC C021-1/23.77.31.85,0809,7122,392.-1,2099225302.2,2.4,2.82.4,2.82.2,2.4,2.84202IONIZATION NONE33.544,5835032.2.2.4.2.8TOTAL9.212,2583,164IIUNIT2ENGINEERED iSAFETYSYSTEMS!ANDMCC*ROOM!EL.609-0"g459IONIZATION (3UNDERFLOOR)5INFRARED(2UNDERFLOOR)AUTOMATIC C021-1/2(SEENOTE16)23,4432,8842.2,2.5,2.6,2.8EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE23OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*IFIREAREA*IIIIUNIT2EMERGENCY IPOWERSYSTEMSIAREAEL.609'-0"II46A46846CEXISTINGDETECTION 2IONIZATION 2INFRARED2IONIZATION INFRARED3IONIZATION 2INFRAREDEXISTINGSUPPRESSION AUTOMAT1C C02AUTOMATIC COZAUTOMATIC C02MINIMUMRATINGOFFIREAREABOUNDARIES 1-1/2EQUIVALENT FIRESEVERITY(MINUTES) 3.58.34.0FIRELOADBTU/FT4,79311,1505.502AREAFT1,209922530FIGURENUMBER2.2,2.6,2.82.5,2.82.2,2.5,2.84602IONIZATION NONE30.039,9735032.2,2.5,2.8IIUNIT24RVISWITCHGEAR ROOMSEL.609'-0"47A4782IONIZATION 3INFRARED2IONIZATION 3INFRAREDAUTOMATIC C02AUTOMATIC C02TOTAL1-1/2(SEENOTE17)9.214.412.912,35619,15817.1363,1641,4761,4402.2.2.82.2,2.8TOTAL13.618,1592,916EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE24OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*!FIREAREA*IIiUNIT1CONTROLROOM53EXISTINGDETECTION 45IONIZATION (20ABOVECEILING)EXISTINGSUPPRESSION NONE(SEENOTE51)MINIMUMRATINGOFFIREAREABOUNDARIES 3(SEENOTES20AND21)EQUIVALENT FIRESEVERITY(MINUTES) 21.2FIRELOADBTU/FT28,225AREAFT24,410FIGURENUMBER2.2,2.5.2.10IUNIT2CONTROLROOM5441IONIZATION (17ABOVECEILING)NONE(SEENOTE52)3"(SEENOTES21.22AND29)22.630,0694,4102.2,2.10UNIT1SWITCHGEAR ROOMCABLEVAULT5513IONIZATION 10INFRAREDAUTOMATIC CO2(NOTINBATTERYROOM)3(SEENOTES14AND15)25.133,5369,0862.2,2.4,2.9UNIT1AUXILIARY ICABLEVAULTI6IONIZATION IAUTOMATIC C021-1/2I(SEENOTE13)51.168,1201,7832.2~2.4.2.9EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE25OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS~~FIREAREA*EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERIUNIT1CONTROLIROOMCABLEVAULTIANDHOTSHUTDOWNPANELAREAI(SEENOTE26)I57II14465IONIZATION 1IONIZATION AUTOMATIC HALON1301,MANUALC02NONE1-1/2(SEENOTE20)77.8103,5904,410892.2,2.5,2.92.10IUNIT2CONTROLIROOMCABLEVAULTANDHOTSHUTDOWNPANELAREAI(SEENOTE26)5814576IONIZATION 1IONIZATION AUTOMATIC HALON1301,MANUALC02NONETOTAL3(SEENOTE22)76.374.7101,54199,3444.4994,410892.2,2.92.10TOTAL73.297.3794,4ggEACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE26OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*IIIIIFIREAREA*IIIUNIT2AUXILIARY CABLEVAULTEXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBER596IONIZATION IAUTOMATIC IC021-1/2(SEENOTE19)40.754.2371,7012.2,2.9UNIT2SWITCHGEAR ROOMCABLEVAULT6013IONIZATION I10INFRAREDAUTOMATIC C02(NOTINBATTERYROOM)3(SEENOTES16ANO17)19.025,4879,1632',2.5.2.9IUNIT1CHARGINGPUMPROOMSII62A62B62C2IONIZATION 2IGNIZATION2IONIZATION DRYPILOTPREACTIONSPRINKLER SDRYPILOTPREACTION SPRINKLERS DRYPILOTPREACTION SPRINKLERS 3(SEENOTES2,4AND25)26.222.324.535,03429,79032,6564364164162.5,2.72.5,2.72.2,2.5,2.7TOTAL24.432,5381,270EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE27OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*IFIREAREAi'XISTING DETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBERlUNIT2CHARGING!PUMPROOMSI63A63B2IONIZATION IDRYPILOTPREACTION SPRINKLERS 2IONIZATION (DRYPILOTPREACTIONSPRINKLERS 3(SEENOTES2,4AND3B)25.124.133,42632,1494384162.72.763C2IONIZATION DRYPILOTPREACTION SPRINKLERS 23.231,02241622,2'TOTAL24.132,2171,270EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE28OF35 TABLE2"2FIREPROTECTION FEATURESFORFIREAREAS~FIREAREAR'XISTING DETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2,ARE)FTFIGURENUMBERIUNIT1ICONTAINMENT (SEENOTE26)666768101103THERMISTORS FORCABLETRAYSTHERMISTORS IFORREACTORCOOLANTPUMPS,FORCABLETRAYS,ANDFORCHARCOALIFILTERUNITS1-HV-CFT-1 1-HV-CFT-2 THERMISTORS FORCABLETRAYSTHERMISTORSIFORCABLETRAYSTHERMISTORS FORCABLETRAYSNONEAUTOMATIC WATERSPRAYSYSTEMFORBOTHCHARCOALFILTERUNITS,MANUALWATERSPRAYSYSTEMFORRCPsNONENONENONE19.258.43.528.94.925,59377,6394,61138,4836,5294'663,6486,3161,2306152.3,2.4,2.72.3,2.4.2.7.2.8.2.10.2.112.2,2.3.2.4~2.102.112.4,2.82.3,2.4.2.7.2.8118120122132134NONENONENONENONENONENONEIfNONENONFNONENONE7.416.36.89,9225,75121,7109,1602302.85803,5066652.3,2.82.3.2.4,2.10,2.112.3.2.4~2.6.2.72,5802.3.2.4.2.8TOTAL16.822,60823,536EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE29OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS*FIREAREA%EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBER!HVACEQUIPMENT ANDCOMPUTERIROOMS7071727312IONIZATION (6INDUCTS)THERMISTOR FORCHARCOALIFILTERUNIT1-HV-ACRF-1 ALARMONLY(HIGHVOLTAGE)4IONIZATION (2UNDERFLOOR)HALONACTUA-TIONN(LOWVOLTAGE)6IONIZATION (3UNDERFLOOR)lALARMONLY(HIGHVOLTAGE)4IONIZATION (2UNDERFLOOR)HALONACTUA-TION(LOWVOLTAGE)6IONIZATION (3UNDERFLOOR)12IONIZATION (6INDUCTS)1THERMISTOR FORCHARCOALFILTERUNI~2-HV-ACRF-1 MANUALWATERSPRAYFORCHARCOALFILTERUNITAUTOMATIC HALON1301AUTOMATIC KALON1301MANUALWATERSPRAYFORCHARCOALFILTERUNIT3(SEENOTES21,29AND62)8.287.5106.47.111,187116,545141,6079.4691,7154304301,7702.2,2.5.2.112.2,2.5,2.112.2,2.112.2,2.11TOTAL25.333,820'4,345EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE30OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS+FIREAREA~EXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT IFIRESEVERITY(MINUTES)

FIRELOADBTU/FTAREAFT2FIGURENUMBER!UNIT2CONTAINMENT (SEENOTE26)I74THERMISTORS INONEFORCABLETRAYS23.130,7394,1662-3.2.775THERMISTORS FORREACTORICOOLANTPUMPS,FORCABLETRAYS,ANDFORCHARCOALFILTERUNITS2-HV-CF7-I2-HV-CFT-2 AUTOMATIC WATERSPRAYSYSTEMFORBOTHCHARCOALFILTERUNITS,MANUALWATERSPRAYSYSTEMFORRCPs62.182,5623,6482.3,2.7.2.8.2.10.2.1176THERMISTORS INONEFORCABLE"'RAYS 4,4676,316I2.2,2.3.2.10,2.III102THERMISTORS FORCABLETRAYSNONE20.627,4141,230104THERMISTORS INONEIFORCABLETRAYS5.57,3286152.3,2.7.2.8119121123133135NONENONENONEINONEINONEINONENONENONENONE4.92.29.06.86,4812,99312,0279,1602305803,5066652.3.2.82.3.2.10,2.112.3,2.6-2,5802.3,2.8TOTAL17.223,11223,536EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE31OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS~FIREAREAREXISTINGDETECTION EXISTINGSUPPRESSION MINIMUMRATINGOFFIREAREABOUNDARIES EQUIVALENT FIRESEVERITY(MINUTES)

FIRELOADBTU/FT2AREAFTFIGURE'"NUMBERUNIT1TANKAREAPIPETUNNEL116NONENONE3(SEENOTE5)0.24371,7242.2,2.3,2.4,2.7IUNIT2TANKAREAIIPIPETUNNEL117NONENONE3(SEENOTE8)0.45151,7242.2,2.3,2.7EACHFIREAREAISSEPARATED BYASOLIDHORIZONTAL LINEWITHSOMEFIREAREASCONSISTING OFMULTIPLEFIREZONES.PAGE32OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREASNOTES(1)CLOSE-SPACED DRYPILOTPREACTION SPRINKLERS AROUNDPERIMETER OFSTAIR(S)ATCEILINGLEVEL(2)SEESECTION9.4FORBOUNDARYEVALUATION OFVERTICALAIRSHAFTS(FIREAREAS12AND22)(3)DRYPILOTPREACTION SPRINKLERS INNORMALLYACCESSIBLE PORTIONSOFTHEFIREZONE(4)SEESECTION9.6FORBOUNDARYEVALUATION OF6APIPETUNNEL(5)SEESECTION9.23FORBOUNDARYEVALUATION OFFIREAREA116(6)SEESECTION9.7FORBOUNDARYEVALUATION OFFIREAREAS13AND14(7)SEESECTION9.8FORBOUNDARYEVALUATION OFFIREAREAS20AND21(8)SEESECTION9.24FORBOUNDARYEVALUATION OFFIREAREA117(9)SEESECTION9.25FORBOUNDARYEVALUATION OFESWPUMPSFIREAREAANDHATCHEVALUATION BETWEENFIREZONE29CANDFIREZONE29G(10)CCWPUMPCOVERAGETOPROTECTBEARINGS(11)SEESECTION9.21FORDOOREVALUATION BETWEENFIREZONE43ANDFIREZONE110(12)SEESECTION9.22FORDOOREVALUATION BETWEENFIREZONE44SANDFIREZONE111(13)SEESECTION9.14fORHATCHEVALUATION BETWEENFIREZONE43ANDFIREAREA56(14)SEESECTION9.15FORHATCHEVALUATION BETWEENFIREZONE408ANDFIREAREA55(15)SEESECTION9.16FORHATCHEVALUATION BETWEENFIREAREA41ANDFIREAREA55(16)SEESECTION9.19FOR(17)SEESECTION9.20FORHATCHEVALUATION BETWEENFIREAREA45ANDFIREAREA60HATCHEVALUATION BETWEENFIREZONE478ANDFIREAREA6D(18)NOTINDRUMSTORAGE(19)SEESECTION9.18FORHATCHEVALUATION BETWEENFIREZONE52ANDFIREAREA59(20)SEESECTION9.13FORHATCHEVALUATION BETWEENFIREAREA53ANDFIREAREA57PAGE33OF35 TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)SEESECTION9.5FORHATCHEVALUATION BETWEENFIREAREAS53AND54ANDFIREZONES70AND73SEESECTION9.17FORHATCHEVALUATION BETWEENFIREAREA54ANDFIREAREA58SEESECTION9.26FORBOUNDARYEVALUATION OFFIREAREA9ANDFIREAREA10SEESECTION9.27FORBOUNDARYEVALUATION OFFIREAREA24ANDFIREAREA25SEESECTION9.31FORUNIT1LEAKAGEDETECTION BOXEVALUATION THISFIREAREACONTAINSADDITIONAL FIREZONESWHICHWEREPREVIOUSLY UNIDENTIFIED THISFIREAREACONTAINSADDITIONAL FIREZONESWHICHWEREPREVIOUSLY IDENTIFIED ASSEPARATEFIREAREASEESECTION9.1FORDUCTEVALUATION BETWEENFIREZONE43ANDFIREZONE91SEESECTION9.2FORDUCTEVALUATION BETWEENFIREAREA54ANDFIREZONE73SEESECTION9.3FORDUCTEVALUATION OFCCWPUMPSSEESECTION9.9FORBOUNDARYEVALUATION OFFIREAREACONTAINING FIREZONES3,32,36,48AND69WITHFIREAREACONTAINING FIREZONES49,50,51AND52SEESECTION9.10FORBOUNDARYEVALUATION BETWEENFIREZONE43ANDFIREZONE44NSEESECTION9.11FORBOUNDARYEVALUATION BETWEENTURBINEBUILDING, SERVICEBUILDINGANDMAINSTEAMPIPETUNNELSSEESECTION9.12FORBOUNDARYEVALUATION BETWEENTURBINEBUILDINGANDSCREENHOUSESEESECTION9.28FORBOUNDARYEVALUATION BETWEENFIREAREA61ANDFIREZONE5SEESECTION9.29FORBOUNDARYEVALUATION BETWEENFIREAREA105ANDFIREZONE33ASEESECTION9.30FORBOUNDARYEVALUATION BETWEENFIREAREACONTAINING FIREZONES3,32,36,48,49,50,51.52.69ANDFIREAREAS31,35.106,107AND146SEESECTION9.32FORUNIT2LEAKAGEDETECTION BOXEVALUATION SEESECTION7.13FORAUXILIARY BUILDINGHVACDUCTPENETRATION EXEMPTION SEESECTION7.14FORSEISMICGAPEXEMPTION FLOORDRAINAGEOPENINGFROMFIREAREA17FTOFIREZONE2BELOWSEESECTION7.2FORFUlLAREASUPPRESSION EXEMPTION SEESECTION7.3FORFIXEDSUPPRESSION EXEMPTION SEESECTION7.4FORFIXEDSUPPRESSION EXEMPTION PAGE34OF35

TABLE2-2FIREPROTECTION FEATURESFORFIREAREAS(45)SEESECTION7.5FORFIXEDSUPPRESSION EXEMPTION (46)SEESECTION7.6FORFIXEDSUPPRESSION EXEMPTION (47)SEESECTION7.7FORFULLAREASUPPRESSION EXEMPTION (48)SEESECTION7.8FORFIXEDSUPPRESSION EXEMPTION (49)SEESECTION7.9FORFIXEDSUPPRESSION EXEMPTION (50)SEESECTION7.10FORONE-HOURBARRIEREXEMPTION (51)SEESECTION7.11FORFIXEDSUPPRESSION EXEMPTION (52)SEESECTION7.12FORFIXEDSUPPRESSION EXEMPTION (53)AUXILIARY BUILDINGPASSENGER ANDFREIGHTELEVATORDOORSARECLASS8(54)CONTROLLED ACCESSTOEACHFIREZONEISVIALOCKEDSCREENMESHGATE(55)DETECTION COVERAGEDOESNOTEXTENDINTOZONECUBICLESCONTAINING RADIOACTIVE EQUIPMENT LOCATEDBEHINDSHIELD"!A'SWITHCONTROLLED-ACCESS SCREENMESHGATES(56)SEESECTION9.33FORBOUNDARYEVALUATION OFFIREZONE6ATOFIREZONE1388(57)SEESECTION9.34FORBOUNDARYEVALUATION OFFIREZONE36TOFIREZONE5(58)SEESECTION9.35FORBOUNDARYEVALUATION OFFIREZONE33ATOFIREZONE108(59)SEESECTION9.36FORBOUNDARYEVALUATION OFFIREZONE34ATOFIREZONE109(60)SEESECTION9.37FORBOUNDARYEVALUATION OFFIREZONE5TOFIREZONE32(61)SEESECTION9.38FORBOUNDARYEVALUATION OFFIREZONE69TOFIREZONES108AND109(62)SEESECTION9.39FORBOUNDARYEVALUATION OFFIREZONE70TOFIREZONE129(63)SEESECTION9.40FORBOUNDARYEVALUATION OFFIREZONE7TOFIREZONE61(64)SEESECTION9.41FORBOUNDARYEVALUATION OFFIREZONES44NAND37TOFIREZONE51PAGE35OF35

TABLE2-3MAXIMUMALLIABLECOMBUSTIBLE LOADINGFORFIREZONESINVOLVEDINEXEMPTION AND/OREVALUATION FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinutelA1BlE1F138BlA;1B,lCand1DlE,lF,1Gand1H138A,138B and138Cl,lA~1H,136,137,138A, 138Band138C1,7904,8154,7744',9136,2426,0634,0791.3.3.63.63.74.52.920,00020,000,20,00020,00013,00020,00020,00013,00020,000151515151015151015ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page1of14

TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute91108Fixed108Transient 109Fixed.109Transient 110Fixed110Transient illFixedillTransient 139140141142143~25,87510,18715,8728038383,6982,19625,65219.47.611.80.60.62.61.51953,00027,00013,00033,00013,00027,00013,00027,00013,00013,00033,00033,00053,00013,0004020102510201020101025254010ENDOFFIRE'REA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page2of14 TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllovable Combustible LoadinBtu/ftMinute32365052693,32,36,48and6949,50and5249,50,51and523,32,36,48,49,50, 51and523,31,32,35, 36,48,49,50, 51,52,69, 106,107and14623,3113,71986,72544,30910,7172,9986,60030,77828,62915,00017,28317.42.765.233.27.92.22321.41212.940,00020,000100,'00060,00027,00020,00020,00047,00047,00033,00033,000301575~4520151535352525ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page3of14 TABLE2-3(continued)

ExistinCombustible LoadinMaximumAllowable Combustible LoadinFireZone(s)*Btu/ft2MinuteBtu/ftMinute6A6164A64B65A-65B5,6N,6M,6S,61,64A,64B,65Aand65B5,6A,6N,6M,6S,61, 64A,64B,65Aand65B11,29914313,84612,64210,73911,51813,00812,4208,9478.50.110.49.48.69.79.36.527,00013,00027,00027,00027,00027,00027,00027,00027,000201020202020202020ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page4of14 TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible Loadin'tu/ft Minute116,62987.5133,000100ENDOFFIREAREA30,84123.147,00035ENDOFFIREAREA10104,25078.3120,00090ENDOFFIREAREA26,34419.740,00030ENDOFFIREAREA1217221.220,00015ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTables1-1and2-2Page5of14

TABLE2-3(continued)

ExistinCombustible LoadinMaximumAllowable Combustible LoadinFireZone(s)*Btu/ft2MinuteBtu/ftMinute1325,46919.140,00030ENDOFFIREAREA141,0560.813,000.10ENDOFFIREAREA201,50320,000ENDOFFIREAREA2128,0632147,00035ENDOFFIREAREA221,0220.613,00010ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTables1-1and2-2Page6of14 TABLE2-3(continued) vFireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute2328,71621.547,00035END'OFFIREAREA2478,08358.793)0007.0ENDOFFIREAREA2621,08615.933,00025ENDOFFIREAREA2785,00963.9100,00075ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTables1-1and2-2Page7of14 TABLE2-3(continued)

.FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute29Aand29B29A,29Band29E29Cand29D29C,29Dand29F29G6,8426,6676,8426,37911,8585.15.14.88.820,00020,00020,00020,00013,0001515151510ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTables1-1and2-2Page8of14 TABLE2-3(continued).

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllovable Combustible LoadinBtu/ftMinute33A33B1059,12923615,6196.70.211.727,00013,00033,00020102533and33A33,33Aand33B33,33A,33Band10510,8409,53011,53088.527,00027,000.27,000202020ENDOFFIREAREA34A34B34'nd34A34,34Aand34B4,2045,7355,9375,9093.14.34.54.320,00020,00020,00020,00015151515ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page9of14

TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ft,MinuteMaximumAllowable Combustible LoadinBtu/ftMinute44A,44B,44C and44D44E,44F,44G and44H37,44A44H,44Nand44S37,43,44A44H,44Nand44S74,36119,1925,5737,64525,85334,48255.814.25.71925.880,00033,00020,00020,00040,00047,000602515153035ENDOFFIREAREA*FireZone(s)aregroupedtogether.byfireareasimilartoTablesl-land2-2Page10'of14 TABLE2-3(continued)

ExistinCombustible LoadinMaximumAllowable Combustible LoadinFireZone(s)*Btu/ft2MinuteBtu/ftMinute3841,2883160,000ENDOFFIREAREA3930,6222347,000,35ENDOFFIREAREA40B18,14413.633,00025.ENDOFFIREAREA4127,61420.740,00030ENDOFFIREAREA4523,44317.6.40,00030ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Pagellof14, TABLE2-3(continued).

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute47B17,13612.933,00025ENDOFFIREAREA5328,22521.247,00035ENDOF.FIREAREA30,06922.647,00035ENDOFFIREAREA5533,53625.147,00035ENDOFFIREAREA5668,120"51.180,00060ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page12of14 TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute57103,59077.8120,00090ENDOFFiREAREA5899,34474.7113,00085ENDOFFIREAREA54,23740.767,00050ENDOFFIREAREA6025,4871940,00030ENDOFFIREAREA62A,62Band62C32,53824.447,00035ENDOFFIREAREA*FireZone(s).are groupedtogetherbyfireareasimilartoTablesl-land2-2Page13of14 TABLE2-3(continued)

FireZone(s)*ExistinCombustible LoadinBtu/ftMinuteMaximumAllowable Combustible LoadinBtu/ftMinute63A,63Band63C32/21724.147,00035ENDOFFIREAREA7370,71,72and739,46933,8207.125.327,00047,0002035ENDOFFIREAREA1164370.213,00010ENDOFFIREAREA1175150.413,00010ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page14of14 AELRSATRDOFCLC51~EL.EIPO

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0I FIREAREASIDEOFBARRIER4~44t~srstatt~~J'4J4~4~o4'r4srsra~~4aa~at~4~ta'o~t4Jpr~t4~T4~~JJ4~4~~4~~~4~r~t~~~~~r~~~t~~~<<aasas4~r~~~4~4~~~~r~4~ars4~s~raTisa~Ja~4~44~4~~rsas~44~~r~4~'I4TOTALWALLTHICKNESS COLDSIDEOFBARRIER~PERNFPAACHIEVESA11/2TO2HOURRATINGFORNORMALWEIGHTCONCRETE~COLDSIDEFAILURETEMPERATURE SAPPROXIMATLY 322oFFIGURE2.0-.aEMBEDDEDCONDUITANDCABLEFIREAREASIDEOFBARRIERJ4~r~t4~~~t~4~aaa~asa~raa~aaa~saTtrtt~~srirrrdrt~T~444444T44~~~4~~44~raa4t4rd~~s~~~~OJ~trd~S~r~~~J4~4r~4~J4rTT~r~~4t4PTa~~~r~44~4~4~~~rST~r~r4~~4~~~~rr~~4JrJ~r44Jrr~~~~T4tt~att444~4~Ja~~r4~Ja~rapt~~~~~4t't~~4i4r~~~444~Jar~4T~4~4~raaat~aapJar~4~~4~~~4~a~~'444~~~r~444~pt4~~4~4~~~JJJ~~J~444TS~~~444~P~~~dtt4TT4T'~~J~t4J44~44Ji44TrJs44~pr~'rJJra,rst~~~T~Tr~T4~ad~4rd4JrTt444~r~~rarTrTrar'o4~~4~44r4dr~4Jr~'Jr~4i~4~ao~r~4rr4~~JT~~aa~arr~~OJJr~4rJ4~Js~rs4~JCOLDSIDEOFBARRIER44MINIMUMEMBEDDMENT 12TO36TOTALWALLTHICKNESS FIGURE2.0-bFIGURES2;0-aAND2.0-bEMBEDDEDCONDUIT 3.DETECTION ANDSUPPRESSION SYSTEMSSection3providesdetailedinformation onthedetection andsuppression systemsinstalled attheD.C.CookNuclearPlant.Theinformation contained inthissecti'ongenerally presentstheD.C.Cookplantconfiguration ofeachfirezone'sfireprotection featuresattheendofthe1986Unit2refueling outage.Thefireprotection featuresincludemodifications requiredforcompliance withAppendixRSectionIII.G,aswellasgeneralplantimprovements initiated atthetimeofi'ssueofthisreport.Theseactivefireprotection measurescomplement thepassiveprotection providedbytheareaandzoneboundaries discussed inSection2.Inconjunction withothercomplementary

features, theyprovideadditional defense-in-depth thatensurethatexposure'fireswillbepromptlydetectedandextinguished.

Inconjunction withadequatephysicalseparation, theyalsoprovideameansofcompliance withtheprovisions ofAppendixRSectionIII.G.2.Atabulation byfirezoneoftheinformation contained inthissectionisprovidedinSection2,Table2-2.3.1FireDetection Sstems3.1.1GeneralSstemInformation TheControlRoomsoftheD.C.CookNuclearPlant,whicharestaffed24hoursadaybytrainedpersonnel, functionastherequiredcentralsupervising stationforeachunitattheplant.Page3-1 TheControlRoomsarecontained withinthree-hour fire-rated construction withappropriate doorsanddampers,therebymeetingthelocationandseparation requirements forthecentralsupervising stations.

SeeSections9.2,9.5,9.13,and9.17fortechnical evaluations withrespecttounratedand/orunprotected boundaryopeningsfortheControlRooms.Supervisory capability isprovidedforthedetection systemstoindicatewhenmaintenance ofthesystemisrequiredforcircuitbreaksorgrounds.Allfiredetection systemsprovidebothaudibleandvisualalarmsonthefirealarmcontrolpanelintherespective ControlRoom.AlarmsalsosoundinareaswhereeitherHalonorCarbonDioxidesuppression systemsareutilized.

3.1.2SstemDescritionsThreemodesoffiredetection areprovidedattheD.C.CookNuclearPlant.Theyareionization smokedetection, thermistor heatdetection, andinfraredflamedetection.

Inaddition, therearespotlocations protected byheatdetectors whichareelectrically connected intotheionization smokedetection 4systemsinspecificfireareas.Table2-2andFigures3-1through3-6identifythelocations ofthedetection systemsatD.C.Cook.Theionization smokedetection systemsaretheprimaryformoffiredetection intheplant.Infraredflamedetectors arecrossedzonedwiththesmokedetection systemsinsomefirezonesPage3-2 firezones,activation ofboththesmokedetection systemandtheflamedetection systemarerequiredbeforeactuation ofthesuppression system.Theauxiliary cablevaultshaveonlyonezoneoffiredetection, whichalsoautomatically actuatestheC02gaseoussuppression systemslocatedtherein.Thermistor detection systemsareprovidedinanumberofafirezonesintheplant.Singlezonesofdetection areprovidedforalarmpurposesonlyaroundtheturbinegenerators, reactorcoolantpumps,andthein-containment cabletrays.Thermistor detection andalarmisusedinandaroundsomepartsofthemainturbineswheremanualinitiation ofwaterspraysuppression systemsprotecttheturbinesabovetheoperating floor.Thermistor detection andalarm,withmanualinitiation ofwaterspraysuppression, alsoprotectthereactorcoolantpumpslocatedinsidecontainment.

SeveralCarbonDioxideSuppression Systemsareautomatically actuatedbyonezoneofthermistor detection.

Singlezonethermistor detection isprovidedforalarmandautomatic actuation ofC02suppression systemsfortheDieselFuelPumpRooms,LubeOilRooms,andTurbineOilTankRooms.Twozonesofthermistor detection areprovidedforalarmandautomatic activation ofC02suppression systemsfortheDieselGenerator Roomsofbothunits.Page3-3 Thecharcoalfilterunitsareprovidedwithasinglezonethermistor detection system.Eachdetection systemhastwohightemperature alarms.Uponreceiptofthehighertemperature firealarm,thesystemvalvewillbeautomatically opened.However,forthosesystemslocatedoutsideofcontainment, theshut-offvalveupstreamofthesystemvalvemustbemanuallyopenedbeforewaterwilldischarge intothewaterspraysystempiping.3.2FireSuressionSstems3.2.1GeneralSstemInformation Allautomatic suppression systemsalarmbothaudiblyandvisuallyonthefirealarmcontrolpanelintherespective ControlRoom.Supervisory capacityisbuiltintothewatersuppression systemsintheformofposition-indicating tamperswitchesonallshut-offvalvesforindividual systems.Whenthesevalveschangefromtheirnormalpositionbeyondaspecified limit,analarmsoundsbothaudiblyandvisuallyintherespective ControlRoom.Supervisory capability isprovidedonrelays,isolation

switches, andhighorlowtankpressurefortheCarbonDioxidesystems.The,solenoidvalvesforreleaseofthemainHalontanksprotecting theCableSpreading Roomsarealsosupervised.

Page3-4

~~3.2.2SstemsDescritionThreebasicmodesoffiresuppression areprovidedattheD.C.CookNuclearPlant.Theyarewater,Halon,andcarbondioxidesuppression systems.Eachisdescribed indetailbelow,,withsystemlocations indicated inTable2-2andidentified onFigures3-1through3-6.3.2.2.1WaterSuressionSstemsWatercanbeappliedtoanypotential fireinprotected areasbyoneormoreoffourtypesofwatersuppression systems.Theseare:(1)Automatic wetpipesprinkler systems(2)Drypilotpreaction sprinkler systems(3)Waterspraysuppression systems(manualandautomatic)

(4)ManualhosestationsThewatersupplyforthesesuppression systemsforbothunitsoftheplantisthroughacommonsupplyheader.Thisinteriorsupplyheaderisalsointerconnected withtheyardmainI'eaderbysealed-open sectionalizing valves.Eachinteriorsuppression system,withtheexception ofthecharcoalfiltersuppression systemsoutsideofcontainment, isequippedwithnormallyopen,manualshut-offvalvesandisinstrumented withwaterflowindicators toprovideaudibleandvisualannunciation intherespective ControlRoom.Eachunitisequippedwitha2000-gpmelectricmotor-driven firepumpanda2000-gpmdieselPage3-5 motor-driven firepump.Inaddition, asingle500-gpmelectricmotor-driven firepumpisprovidedtohandlewaterflowrequirements oflessthan500-gpminbothunits.Allfivepumpsareelectrically independent toensurethatfailureofanypumpwillnotimpairthereliability ofthewatersuppression'ystems.

Withregardtofirepumpsequencing, whenahighdemandsystemoperates, thefire.pumpsarestartedthroughthehighdemandlogicsystem.Thefirstpumptostartwillbethehighdemandelectricmotor-driven pumpintheunitrequiring watersuppression.

Iftheelectricmotor-driven pumpfailstooperate,orifadditional capacityisneeded,theheaderpressurewillfallbelowasetpointandthediesel-driven pumpinthesameunitwillstartthroughthelogicsystem.Ifmorecapacityisstillneeded,assensedbyheaderpressure, theelectricmotor-driven firepumpintheotherunitwillstart.Ifstillmorecapacityisneededtomaintainheaderpressure, theremaining diesel-driven pumpoftheotherunitwillstart.Ifadequateheaderpressureisstillnotmaintained bythefourhighdemandfirepumps,theelectricmotor-driven lowdemandfirepumpkwillstart.Lowpressuresensingdevicesareinstalled inthemaininteriorsupplyheadertoensurethat,iffire-fighting waterflowsgreaterthan2000-gpmarerequired, (themaximumsingledemandis3700-gpmfortheUnitlmaintransformer andTurbineBuildingwall),additional pumpingcapacitywillautomatically beprovidedtomaintainheaderpressure.

Page3-6 Pumpconnections totheinteriorandyardloopheadersarewidelyseparated.

The=diesel-driven pumpsareonoppositeendsoftheintakescreenhouse (FireZones28and30)andtheelectricmotor-driven pumpsareonoppositeendsofthepumppitwithinFireZone2oftheTurbineBuilding.

Powersuppliesforthepumpsarefromseveralsources.Theelectricpumpsaresuppliedfrommetalcladswitchgear andmotorcontrolcenterswhicharesuppliedfromalternate sources.Eachdiesel-driven pumphastwoindependent startingbatterysources,eachwithitsownchargingequipment andwithautomatic and/ormanualthrowover.

Eachdiesel-driven pumpislocatedinitsownthree-hour-rated room.Similarisolation oftheelectricmotor-driven pumpsisnotnecessary, duetothelackoffireexposureandspatialseparation inthepumppitarea.Boththeelectricanddiesel-driven pumpshaveavailable running,electricpower,andstrainercondition indication alarmsintheirrespective ControlRooms.Thediesel-driven pumps,inaddition, haveenginesupervisory information suchascoolantover-temperature, failuretostart,engineoverspeed, andlowoilpressurealarmintherespective ControlRoom.Thewetpipe,preaction andwaterspraysprinkler systemsaretheprimaryformsofautomatically applyingwateronafire.Adrypilot,preaction sprinkler systemdiffersfromawetpipe'systemonlyinthatautomatic detection bythepilotsystemisrequiredbeforewaterwillenterthepipenetworkinthearea.Page3-7 Boththepilotpipingandsprinkler pipingheadsarenormallyclosed;however,thepilotpipingheadsrequirealowertemperature tooperate.'Thiswillcausetheoperation ofthepneumatically-operated systemdelugevalve,allowingwatertoentersprinkler piping.Atthispoint,thedrypilotsprinkler systemfunctions justlikeawetpipesprinkler system.Upondetection ofahighertemperature bysprinkler pipingheads,thesystemdischarges waterontothefirethroughthesprinkler pipingheadsthathavenowoperated.

Inaddition, specificareasand/orequipment areprotected byautomatic and/ormanualfixed-Pwaterspraysystems.Theoutsidecontainment charcoalfilterunits'ixed-water suppression systemhasbeenmodifiedtobeequippedwithanormallyclosedmanualshut-offvalve,locatedupstreamofthesystemvalve.Thismodification hasbeeninitiated atthetimeofissueofthisreport.Eachautomatic preaction sprinkler andfixed-water spraysystemalsocanbeoperatedmanually.

Manualfire-fighting hosestationsaretheprimarybackuptotheautomatic and/ormanualwatersuppression systems.Hosestationsarelocatedinplantareasoutsidecontainment (suchasItheTurbineandAuxiliary Buildings).

Additional hosestations~'relocatedataccessareastotheControlRooms,ControlRoomcablevaults,theauxiliary cablevaults,thecontainment cabletunnels(withhosestationsalsolocatedwithinthetunnels),

upperandloweraccesstothecontainments, thedieselgenerators andtheemergency powersystemareas.Page3-8 3.2.2.2CarbonDioxideSuressionSstemsAreasindicated inTable2-2thatareprotected bycarbondioxidesystemshaveboundarypenetrations (i.e.,dampers,seismicgaps,andopeningsaroundcables,conduitsandpipes)sealedtoensureretention ofthecarbondioxideconcentrations.

Insomefireareas,however,dampershavenotbeenprovidedforductworkthatcommunicates directlywiththeplantexteriororpassthroughotherareaswithinratedconstruction boundaries totheplantexterior.

FortheC02systemsinthesefireareas,concentration testshave.beenperformed whichdemonstrate thattherequiredconcentration levelscanbemaintained withoutdampers.Theaffectedfirezonesinwhichthissituation existsare40A,40B,41,42A,45,46A,47Aand47B.Adischarge delaytimewithaudiblealarm(forautomatic systemactuation only)isincorporated intoeachsystemdesigntoallowpersonnel timetoleavethearea.Thisisnecessary duetothehealthhazardsassociated withachieving theconcentration levelsofcarbondioxiderequiredtoextinguish thefire.Carbondioxidesuppression systemscanbeactivated bothautomatically andmanually.

TheC02suppression systemscanbeactivated automatically byoneofthefollowing:

(1)Singlezoneionization smokedetection (2)Singlezonethermistor detection (3)Twozonesofthermistor detection (4)Onezoneofionization andonezoneofinfraredflamedetection Page3-9 Shouldalossofpowerpreventthesystemfromautomatically discharging, thefourmastervalvesonthe17-toncarbondioxidestoragetank,locatedinFireZone44N,willfailintheopenposition, therebychargingthesupplyheadersuptothehazardareaselectorvalves.Itisthenpossibleforpersonnel togotothespecificpilotvalvecabinetcontrolling theoperation oftheseselectorvalvesandmanuallyopenthem,allowingC02toenterthehazardarea.EachoftheControlRoomcablevaultsisprovidedwithamanualCO2systemback-uptotheautomatic Halondisystem.3.2.2.3HalonSuressionSstemsTheD.C.CookNuclearPowerPlanthasbeenequippedwithHalon1301inanumberofareas:theControlRoomcablevaults(FireAreas57and58),computer.

areas,TSCareas,securityareas,andguardhouseareas.EachsystemhasitsownsetofHalon1301cylinders.

Penetration sealshavebeenprovidedtoensurethattherequiredconcentration oftheagentismaintained.

Althoughthe'oncentrations

'fHalonrequiredforextinguishment aregenerally lowandwouldnotresult-inserioushealthhaiards,personnel areadvisedtoleaveanyareainwhich.Halonhasbeen,or.isabouttobe,discharged.

TheHalonsuppression systemscanbeoperatedbothautomatically andmanually.

Bothzonesofdetection providedinPage3-10 theseareasmustsenseafirebeforetheagentwilldischarge automatically.

Eachsystemcanbemanuallyactuatedfromtheappropriate controlcabinetorcylinderbank.3.2.2.4PartialZoneorAreaCoveraeCertainareasorzonesintheAuxiliary Buildingareidentified inTable2-2ascontaining partialsuppression coverage.

Thecriteriadeveloped todetermine theacceptability ofpartialcoveragefortheseselectedzonesandareasisasfollows:Automatic firesuppression maynothavebeenprovidedinthoseportionsofFireZones1,3,5,6N,6M,6S,44N,44S,'1and'2basedononeormoreofthefollowing criteria:

(a)Highorextremely highradiation areas;(b)Radioactive processing 1tanks;equipment andstorage(c)Lowcombustible loads;(d)Controlled andlockedpersonnel access;(e)Areasshieldedbywallsseparating equipment fromtheremainder ofthefireareaorzone;(f)Fireratedwallconstruction; (g)Containing processpipingandheatexchangers; (h)Presenceofdetection systems;I(i)Suppression overconcentrated combustible loads.Thesubstantial ALARAconsiderations associated withtheinstallation ofsystemsintheseareas,combinedwiththeextremely lowprobability offiresi'ntheseregions,formedthecriteriawhichjustified theentirezoneforexclusion ofautomatic suppression systemsPage-3-11 fromtheserooms.Inaddition, asuppression systemisnotprovidedinFireZoneslAthrough1H,44Athrough44H,andcontainment forthesamereasonasstatedina-h.(2)Automatic firesuppression systemshavebeenexcludedfromFireZones49and50basedonthefollowing criteria:

(a)Theexistingbarrierconstruction providesadequateisolation andcontainment ofapotential fire;(b)Fullzonedetection isalreadyprovidedwithadditional detection andsuppression providedfortheprincipal combustibles sourceinthezone(charcoal filters);

(c)Redundant safeshutdowncablesand/orequipment existoutsidethezone;therefore, thezoneboundaryisnotrequiredtofunctionasaIII'.G.2separation barrier;and(d)Thenewlyinstalled preaction sprinkler systemslocatedinFireZone52adjacenttothesezoneswillinhibitfirespreadoutofthezonetofirezonesofadjacentfireareas.(3)Automatic firesuppression systemshavebeenexcludedfromFireZones144and145basedonthefollowing criteria:

(a)Theexistingbarrier.construction providesadequateisolation andcontainment ofpotential fire;(b)Fullzonedetection isalreadyprovided.

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~+'<parture C>r~DETECTION ANDSUPPRESSION SYSTEMSPLANTARRANGEMENT REACTORBUILDINGMAINFLOOREL650'NITS152FIGURE3-6 Itl 4.SAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITSMETHODOFINVESTIGATION 4.1IntroductionParagraph 50.48of10CFR50,whichbecameeffective onFebruary17,1981,requiresallnuclear.plantslicensedtooperatepriortoJanuary1,1979,tocomplywiththerequirements ofSectionIIIofAppendixRto10CFR50regardless ofanypreviousapprovals bytheNuclearRegulatory Commission ofotherdesignfeatures.

SectionIII.G.1requiresthatfireprotection featuresbeprovidedforthosesystems,structures andcomponents important tosafeshutdown.

Thesefeaturesmustbecapableoflimitingfiredamagesothat:(1)Onetrainofsystemsnecessary toachieveandmaintainhotshutdownconditions fromeithertheControlRoomortheEmergency ControlStation(s) isfreeoffiredamage;and,(2)Systemsnecessary toachieveandmaintaincoldshutdownfromeithertheControlRoomortheEmergency ControlStation(s) canberepairedwithin72hours.SectionIII.LofAppendixRandGenericLetter81-12(February 20,1981)Enclosure 1"StaffPosition,"

providesadditional guidanceontheNRCStaff'srequirements forthissafeshutdowncapability.

4.1.1DesinBasisEventsForthepurposeofthisreviewandreportforwhichsafeshutdowncapability willbedemonstrated forD.C.Cook,thespectrumofpostulated exposurefiresinagivenplantareawillPage4-1 beanalyzedinvolving eitherin-situortransient combustibles whichareexternaltoanysystems,structures orcomponents locatedinoradjacenttothatarea.mayadversely affectthosesystems,Theeffectsofsuchfiresstructures orcomponents essential tosafeplantshutdown.

Themostlimitingassumption (i.e.,worst-case scenario) withrespecttotheavailability ofoff-sitepowerwillbeassumed.Noconcurrent orsequential designbasisaccidents ortransients areassumedtoexist.Inaddition, norandomsinglefailuresareassumedtooccurotherthanthosewhichoccurasadirectresultoffireanalysisassumptions.

4.2SafetFunctions Thespecificsafeshutdownfunctions necessary tosatisfyAppendixRacceptance criteriaareasfollows:(1)Reactivity ControlFunction(2)ReactorCoolantMakeupControlFunction(3)ReactorCoolantPressureControlFunction(4)ReactorHeatRemovalFunction(5)ProcessMonitoring Function(6)Miscellaneous Supporting Functions 4.2.1Reactivit ControlAfterareactortrip,.thereactivity controlfunctionmustbecapableofachieving andmaintaining atleastalwreactivity shutdownmarginfromzeropowerhotstandbytocoldshutdown.

Thefunctionmustbecapableofcompensating foranyreactivity Page4-2 changesassociated withxenondecayandthereactorcoolanttemperature decreasewhichoccursduringcooldowntocoldshutdownconditions.

4.2.2ReactorCoolantMake-uControlThereactorcoolantmake-upcontrolfunctionshallbecapableofassuringthatsufficient make-upinventory isprovidedtocompensate forReactorCoolantSystemfluidlossesduetoidentified leakagefromthereactorcoolantpressureboundaryandshrinkage oftheReactorCoolantSystemwatervolumeduringcooldownfromhotstandbytocoldshutdownconditions.

Adequateperformance ofthis,functionisdemonstrated bythemaintenance ofreactorcoolantlevelwithinthepressurizer.

4.2.3ReactorCoolantPressureControlReactorcoolantpressurecontrolisrequiredtoassurethattheReactorCoolantSystemisoperated:

(1)Withinthetechnical specifications forReactorCoolantSystempressure-temperature requirements; (2)TopreventpeakReactorCoolantSystempressurefromexceeding 110.ofsystemdesignpressure; and(3)Withasufficient subcooling margintominimizevoidformation withinthereactorvessel.4.2.4ReactorHeatRemovalThereactorheatremovalfunctionshallbecapableoftransferring fissionproductdecayheatfromthereactorcoreataratesuchthatspecified acceptable fueldesignlimitsanddesignconditions ofthereactorcoolantpressureboundaryarePage4-3 notexceeded.

Thefunctionshallbecapableofachieving coldshutdownwithina72-hourperiodandmaintaining coldshutdownconditions thereafter.

4.2.5ProcessMonitorin Wheninformation onprocessvariables isrequiredbyoperators tomodifysafeshutdownsystemalignments orcontrolsafeshutdownequipment, suchmonitoring information mustbeavailable.

Theprocessmonitoring functionshallbecapableofproviding, ifpossible, directreadingsofthoseplantprocessvariables necessary forplantoperators toperformand/orcontrolthepreviously ident'ified functions.

4.2.6Miscellaneous Suort,inFunctions Thesystemandequipment usedtoperformthepreviousfunctions mayrequiremiscellaneous supporting functions suchasprocesscooling,lubrication andac/dcpower.Thesesupporting functions shallbeavailable andcapableofproviding thesupportnecessary toassureacceptable performance ofthepreviously identified safeshutdownfunctions.

4.2.7Discussion Theselection ofsafetyfunctions isprincipally basedonthoseidentified inBranchTechnical Position(BTP)CMEB9.5-lSectionC.5.c.Othersubfunctions mayexistundereachofthesebroadheadings.

Examplesof,suchsubfunctions aresteamgenerator levelcontrolandsteamgenerator pressurecontrolwhichexistasapartofreactorheatremoval.Steamgenerator Page4-4 levelandpressurecontrolarerequiredduringhotstandby.Butduringcertainportionsofhotshutdownandallofcoldshutdown, theResidualHeatRemovalSystemisoperableandthesesubfunctions arenotrequired.

Othersubfunctions likeemergency power,processcooling,etc.,areembracedbythemiscellaneous supporting functiondefinition.

Inadditiontothefunctions identified inBTPCMEB9.5-1,areactorcoolantpressurecontrolfunctionhasbeenincluded.

Althoughthisfunctioncouldbeplacedwithinthereactorcoolantmake-upfunctionandreactorheatremovalfunction, thespecificgoalsachievedbytheperformance ofthisfunctionareuniqueenoughtowarrantaseparatesafetyfunctionclassification.

Thesafetyfunctions identified adequately assurethatthecontainment pressureboundarywillnotbethreatened.

Uncontrolled massandenergyreleasestothecontainment fromtheprimarysystemsarelimitedbytheachievement ofthesesafetyfunctions andwillassurethatnoruptureofthereactorcoolantorcontainment pressureboundaries willoccur.4.3AnalsisofSafeShutdownSstems4.3.1Introduction Variousanalytical approaches couldbetakentoassurethatsufficient plantsystemsareavailable toperformthepreviously identified plantsafetyfunctions.

Numerousplantsystemsareavailable, aloneandincombination withothersystems,toprovidetheserequiredfunctions.

Furthermore, theexactPage4-5 locationandspecificeffectsofexposurefirescannotbeprecisely determined.

Ingeneral,recognizing theconfinedphysicallocationofsuchfiresandtheoperational flexibility andphysicaldiversity ofsystemsavailable toachievesafe,shutdown, onecanassumethatappropriate plantfireprotection featureswilllimitfiredamagetotheextentthatunaffected plantsystemswillbeabletoattainsafeshutdown.

Anextensive effortwouldberequiredtoidentifytheeffectsofpostulated firesinallpotential plantlocations onalltheplantsystemswhicharenormallyavailable tosupportsafeshutdown.

Asaconservative alternative tothisapproach, aminimumsetofplantresponsetotherequirements ofAppendixRwhichcanachieveandmaintainsafeshutdowninspiteofthelocationofthefireeventandthemostlimitingassumedconcurrent lossofoff-sitepower.Demonstration ofadequateprotection ofthisminimumsystemsetfromtheeffectsofpostulated firesconstitutes an'adequate andconservative demonstration oftheabilitytoachieveandmaintainsafeshutdownforthepurposeoffireprotection.

ThesafeshutdownsystemsselectedforD.C.Cookwillbecapableofachieving andmaintaining subcritical conditions inthereactor,maintaining reactorcoolantinventory, achieving andmaintaining hotconditions foranextendedperiodoftime,achieving coldshutdownconditions within72hours,andmaintaining coldshutdownconditions thereafter.

Page4-6 4.3.2InitialAssumtions(1)Theunitisoperating at100~powerupontheoccurrence ofafireandconcurrent lossofoff-sitepower.(2)Thereactoristrippedeithermanuallyorautomatically.

(3)Noadditional singlefailuresareconsidered otherthanthelossofoff-sitepowerandthosedirectlyattributable tothefire.(4)Nopieceofequipment requiredforsafeshutdownisassumedtobeoutofservice.4.3.3Definitions HotStandby-Theinitialsafeshutdownstatewiththereactoratzeropower,Kefflessthan0.99andRCSaveragetemperature greaterthanorequalto350F.HotShutdown-ReactoratzeropowerKefflessthan0.99andRCStemperature between350Fand200oF.ColdShutdown-Reactoratzeropower,Kefflessthan0.99andRCStemperature beloworequalto200oF.4.3.4SafeShutdownFunctions 4.3.4.1Reactivit ControlFunctionInitialreactivity controlwillresultfromanautomatic ReactorProtection System(RPS)triporfromoperatorinitiation ofamanualtripuponnotification ofamajorfire.Thisactionwilldeenergize thenormallyenergized RPStoactuateareactortrip.TheeffectsoffiresontheRPSarenotconsidered toprecludetheinitiation ofanautomatic triporcontrolrodinsertion.

Page4-7 Following rodinsertion, hotsubcritical conditions areachievedforapproximately 35hourswithnoadditionofboron,assumingallrodsareinsertedintothecoreandthereactor6ripoccursatendoflifeandat100~power,withxenonatsteady-statelevel.Asxenondecays,however,positivereactivity isadded,requiring theadditionofboratedwaterfromtherefueling waterstoragetank(RWST)tomaintaintherequiredmarginofshutdownreactivity.

Thecooldowntransition fromhotstandbytohotshutdown, andultimately tocoldshutdown, requiresadditional borationtocompensate forthenegativemoderator temperature coefficient.

Thetotalquantityofborated'waterfromtheRWST(aminimumof1950ppm)whichmustbeinjectedintotheReactorCoolantSystem(RCS)toachievetherequiredcoldshutdownmarginislessthanthequantityofboratedwaterfromthesamesourcerequiredtomaintainaconstantpressurizer levelduringcooldown(ReactorCoolantSystemvolumeshrinkage compensation).

TheChemicalandVolumeControlSystem(CVCS)iscapableofinjecting thisquantityofboratedwaterintotheReactorCoolantSystemandmaintaining therequiredshutdownreactivity marginthroughout safeshutdown.

Figure4.1depictstheRCSReactivity Controlfunction.

4.3.4.2ReactorCoolantMake-uControlFortheassumedfirescenario, reactorcoolantmake-upcontrolcanbeachievedbyisolation ofthenormalandexcessletdownCVCSpathsandoperation ofthechargingportionofthePage4-8 CVCSthroughtheRCPsealinjection path.Theboroninjection tank(BIT)injection pathmayalsobeusedforaddedoperational flexibility.

Reactorcoolantmake-upwillbeavailable withinthefirst30minutespost-reactor trip.Successful maintenance ofRCSintegrity isalsonecessary toachieveadequateinventory andpressurecontrol.Inadvertent openingofboundaryisolation valvessuchasthereactorheadorpressurizer ventvalves,pressurizer power-operated reliefvalves,andRHRsuctionisolation valveshavebeenprecluded andadequatemaintenance ofreactorcoolantpumpsealintegrity achievedtoassuresafeshutdown.

Controlofpressurizer waterlevelachievedmanuallyisbycontrolling CVCSchargingflowbasedonpressurizer levelinformation.

Figure4.2depictstheRCSmakeupcontrolfunction.

4.3.4.3ReactorCoolantPressureControlOverpressure protection oftheRCSpriortoacontrolled cooldownanddepressurization isprovidedbythepressurizer safetyvalves.Afteralignment oftheResidualHeatRemovalSystem(RHR),atapproximately 350Fand400psig,overpressure protection isprovidedby,theRHRsafetyvalves.Thepressurizer safetyvalvesandRHRsafetyvalves,inconjunction withacontrolled cooldownandatimelytransfertoRHRcoolingatoraroundaReactorCoolantSystemtemperature of350F,shouldensurethattheRCSpressure-temperature limitsarenotexceeded.

Foradequatepressurecontrol,isolation ofthepressurizer auxiliary spraywilloccurastheresultofoperatoraction.Page4-9 Theestablishment andmaintenance ofasufficient subcooling marginwithintheReactorCoolantSystemisessential tosuccessful achievement andmaintenance ofsafeshutdown.

Inordertoprovideoperational flexibility andtoenhancethesafeshutdowncapabilities oftheplant,repairprovisions willbedeveloped toprovidetheavailability ofatleastonebackuppressurizer heatergroup.Asdiscussed inSection6,thepressurizer heatersarenotconsidered necessary forplantsafeshutdown.

However,theavailability ofonegroupofheatersenhancesthecapability ofmaintaining sufficient subcooling margin.Figure4.3depictstheRCSpressurecontrolfunction.

J4.3.4.4ReactorHeatRemovalFunctionFollowing areactortripwithanassumedlossofoff-sitepower,decayheatisinitially removedbynaturalcirculation withintheReactorCoolantSystem,-heattransfertotheMainSteamSystemviathesteamgenerators, andoperation ofthepower-operated atmospheric reliefvalves(PORVs)ortheMainSteamSystemcodesafetyvalves.Withthesteamgenerator safetyvalvesalone,theRCS,maintains itselfclosetothenominalno-loadcondition.

Fordecayheatremovalvianaturalcirculation aminimumoftwosteamgenerators willbeavailable.

Thisdecayheatremovalrequirestheabilitytosupplysufficient auxiliary feedwater tothesteamgenerators tomakeupfortheinventory discharged assteambythesafetyorreliefvalves.Formaintenance ofinitialPage4-10 hotstandbyconditions, thesecondary make-upflowrequiredtothesteamgenerators islessthan450gpmandissuppliedbytheAuxiliary Feedwater System(AFW).Auxiliary feedwater sourcesareavailable fromthecondensate storagetanks,andalternatively, fromtheEssential ServiceWaterSystem(ESW).Auxiliary feedwater maybesuppliedtothesteamgenerators bytheauxiliary motor-driven feedwater pumpsorbytheauxiliary steamturbine-driven feedwater pump.Thefurtherremovalofadditional heatisachievedbythecontrolled operation ofthesteamgenerator power-operated atmospheric reliefvalve(PORV)andcontinued operation oftheAuxiliary Feedwater System.Duringthiscooldownphase,anauxiliary feedwater flowofupto450gpmisrequiredandcanbesuppliedwithanindividual motor-orturbine-driven auxiliary feedwater pump.Afterreduction ofReactorCoolantSystemtemperature below350F,theResidualHeatRemovalSystemisusedtoestablish long-term corecoolingthroughtheremovalofdecayheatfromtheReactorCoolantSystemtotheenvironment viatheResidualHeatRemovalSystem,Component CoolingWaterSystem,andtheEssential ServiceWaterSystem.Figure4.4depictsthereactorheatremovalfunction.

4.3.4.5ProcessMonitorin FunctionTheoperatorrequiresknowledge ofvariousplantparameters toperformrequiredsystemtransitions andessential operatoractions.Adiscussion, bysafeshutdownfunction, ofthenecessary instrumentation isprovidedbelow.Page4-11 Forthefirescenarios assumedinthisanalysis, inventory make-uptotheReactorCoolantSystemwillbefromtherefueling waterstoragetankthroughthereactorcoolantpumps'eal injection lines.Analternative pathviatheBITinjection path,hasbeenanalyzedforoperational flexibility; however,itisnotrequiredforsafeshutdown.

Aspreviously discussed, sufficient negativereactivity existsintheReactorCoolantSystem(afterrodinsertion) for35hourswithouttheneedforadditional boronaddition.

Furthermore, thenegativereactivity insertedbythecontrolrodsandtheRWSTwaterinjectedbytheCVCS(tocompensate fortheRCSvolumedecrease) willmaintainthecoresubcritical whilecoolingdownfromhotfullpowertoacoldshutdowncondition, assumingnoletdownisavailable.

Administrative andoperational procedures forD.C.Cookwillensurethatsufficient boronisaddedinatimelymannertotheprimarysystemtoachievethenecessary coldshutdownreactivity margin.Withboronadditionunderprocedural

'control, nooperatoractionsareexpectedoranticipated basedondirect-readingneutronmonitoring toensureanadequatesafeshutdownnegativereactivity margin.However,coresourcerangedetectors willbeavailable forcoreactivitymonitoring intheControlRoom.Anadditional sourcerangechannelwillalsobeaddedtoalocalstation,LSI-4,toprovidethisinformation forareasrequiring alternative shutdown.

Page4-l2 Variousprocessmonitoring functions mustbeavailable toadequately achieveandmaintainthereactorcoolantmakeup,pressurecontrolanddecayheatremovalfunctions.

Fortheassumedfirescenario, maintenance ofhotstandbyrequiresthat,pressurizer levelandRCSpressureinstrumentation beavailable.

ReactorCoolantSystemtemperature ismaintained duringhotstandbybyproperdecayheatremovalviasteamgenerators andself-actuation ofthemainsteamcodesafetyvalvesorcontrolled operation ofthesteamgenerator PORVs.Inthenaturalcirculation modeofoperation, thedifference betweenthehot-legandcold-legwider'angetemperatures (Th-Tc)providesadirectindication oftheexistence ofanaturalcirculation condition.

Operating personnel, bymonitoring ofRCSpressureandhotlegtemperature (Th)instrumentation and,ifavailable, manualcontrolofthepressurizer heaters(notrequiredforsafeshutdown),

willmaintainRCSpressuretoassurethatappropriate subcooling marginisachieved.

Maintenance ofpressurizer levelcontrolisachievedbymonitoring pressurizer levelinstrumentation andmanualcontrolofCVCSchargingflow.Maintenance ofhotstandbyalsorequiresthecontrolofthesecondary systemtocompensate forvariations intheprimarysystemperformance.

Monitoring ofsteamgenerator levelandpressureareavai.lable toassureadequateandcontrolled decayheatremoval.Thelevelcontrolisachievedbyoperatormanipulation ofAFWsystemflow,basedonsteamgenerator levelPage4-13 indication.

Secondary systempressurewillbemonitored bysteamgenerator pressureindication.

Theplantoperators willutilizetheinstrumentation discussed aboveformonitoring ofnaturalcirculation conditions, subcooling margin,heatremovalandcompliance withtheplant'spressure/temperature limitsasitpertainstothelowtemperature overpressure protection oftheReactorCoolantSystem(coldlegtemperature inconjunction withRCSpressure).

4.3.4.6SuortinFunctions Varioussystemsarerequiredtoprovidesupporttosafeshutdownequipment orsystems.Thesesupportsystemsare:(1)Emergency PowerSystem(2)Essential ServiceWaterSystem(3)Component CoolingWaterSystemFigure4.5depictsthesupporting systeminteractions withsafeshutdownsystems.Thefollowing sectionsdiscusseachoftherequiredsafeshutdownsystemsandthesupportsystems.IIt4.4SafeShutdownSstems4.4.1ChemicalandVolumeControlSstem(CVCS)ThechargingportionoftheChemicalVolumeandControlSystem(CVCS)accomplishes thefollowing safetyfunctions:

(1)Reactivity controlbycontrolofsolublechemicalneutronabsorber(boron)concentration intheRCS,reactorcoolantmakeupcontrolbymaintaining waterinventory intheRCS(2)Maintenance ofreactorcoolantpumpsealintegrity Page4-14 Reactivity controlcapability forplantshutdownisprovidedbythecontrolrods,withboricacidinjection usedtocompensate forthexenontransients.

Insertion ofthecontrolandshutdownrodgroupsmakethereactoratleast1%subcritical (keff<0.99)following tripfromanycredibleoperation condition tothehotzeropowercondition, assumingthemostreactiverodremainsinthefullywithdrawn position.

Fortheassumedfirescenario, nostruck-rod condition needbeassumed.Wheneitherunitisatpower,thequantityofboricacidretainedinitsrefueling waterstoragetank,readyforinjection totheRCS,alwaysexceedsthatquantityrequiredtobringthereactorfromafullpowercondition tohotshutdownandthentocoldshutdown.

Fortheassumedpost-fire

scenario, make-upwatertotheReactorCoolantSystemwillbeprovidedbytheChemicalandVolumeControlSystemfromtherefueling waterstoragetank(boratedataminimumof1950ppm).NumerousCVCSflowpathsarenormallyavailable forchargingtotheRCS.Twoseparateandindependent flowpathswillprovidereactorcoolantmakeupandboration:

(1)Thecharginglinetothereactorcoolantpumps'eals willalwaysbeavailable ifatleastoneofthechargingpumpsisoperational.

(2)Injection viatheboroninjection tankisanalternative flowpathwhichisnotrequiredforsafeshutdown; however,itprovidesplantoperational flexibility.

Page4-15 Fortheassumedevent,chargingandborationwillbeaccomplished byoperating aminimumofonecentrifugal chargingpumptakingsuction-fromtherefueling waterstoragetankandinjecting boratedwaterthroughtheRCPsealinjection, linetotheRCSorasanoptionboratedwatermaybeinjectedviatheboroninjection tank.Suctiontothechargingpumpcanbedelivered fromtheRWSTbyopeningeitheroneoftwonormallyclosedmotor-operated valves.Controlled leakage(letdown) fromtheReactorCoolantSystemnormallyoccursviathesealleak-offreturnpathandthenormalandexcessletdownpaths.Forthepost-fire operational

sequence, thenormalandexcessletdownpathswillbeisolated.

Isolation ofthenormalandexcessletdown,lineswilloccurasaresultoflossofinstrument airorwillbeachievedbyoperatoractiontoassureadequateinventory control.Furthermore, procedural controlforisolation ofallpotentially spuriousRCSboundarypaths,including pressurizer PORVs,reactorandpressurizer post-accident ventsandauxiliary spray,willbeachieved.

Sealleak-offflow'eednotbeavailable toachievesafeshutdown.

ThereactorcoolantpumpNo.1sealleak-offair-operatedvalvesfailopen.Inthatcondition, sealreturnflowwillbeavailable atthesuctionofthechargingpumps(throughtPage4-16 thesealwaterheatexchanger) oritmaybelocallyorremotelyisolatedbyacontainment isolation motor-operated valveorbythesealwaterreturnfiltersmanualvalves.Theinjection pathfromthechargingpumpstothereactorcoolantpumpsealscontainsonlyoneair-operated valve(normally open,fail-open) whichisprovidedwithaminimumflow(50gpm)mechanical stop.Thus,operation ofonechargingpumpwillensureaminimumRCSchargingflowofapproximately 20gpm,irrespective oftheavailability oftheBITinjection path.Theinjection paththroughtheBIT(containing 900gallonsof20,000ppmboratedwater)isavailable foroperational flexibility.

Itrequiresremoteormanualopeningoftwomotor-operatedvalvesinseries(totaloffourmotor-operated valvesarrangedintworedundant setsinseries),sincetheRCScoldlegisolation valvesarenormallyopen.Inclusion oftheBITinjection pathasanalternate chargingandborationpath,althoughnotessential forsafeshutdown, willprovideaddedoperational flexibility inthepost-fire scenariodefinedforthisanalysis.

Isolation ofthevolumecontroltank(byclosureofeitheroneoftwomotor-operated valves)duringemergency makeupfromtheRWSTandisolation ofthesealreturnlinetothesealwaterheatexchanger canbeperformed bylocalmanualoperation.

Pressurizer waterlevelismaintained byoperation ofonecentrifugal chargingpumpusingpressurizer levelinstrumentation information.

Page4-l7 CentrifualCharinPumsThetwohigh-head centrifugal chargingpumpsperunitarenormallyalignedfortheCVCSchargingfunction.

Duringdesignbasisaccidents theyarepartoftheECCSsystem.Thetcentrifugal chargingpumpsareof'hehorizontal typewithadesignflowrateof150gpmandadischarge pressureatshutoffof2749psig.EachpumpisdesignedtoprovideratedflowagainstapressureequaltothesumoftheRCSnormalmaximumpressure(existing whenthepressurizer power-operated reliefvalveisoperating) andthepiping,valveandequipment pressurelossesatthedesignchargingchargingpumpshasaminimumflows.Eachofthecentrifugal recirculation flowmotor-operated valvetopreventdamagetothepumpwhenitisoperating atshut-offpressure.

Thepumpsrequirecoolingwater(fromtheCCW)totheirmechanical-seal heatexchangers, gearoilcoolers,bearingoilcoolersandsealhousings.

Thepumpsalsorequireoperation ofexternaloilpressurepumpsinidleconditions.

BoronIn'ection TankTheboroninjection tank(BIT)isdesignedtoholdsufficient concentrated boricacidsolutiontoshutdownthereactorduringaworst-case accident(steamlinerupture).

Designconcentration ofboricacidis12%byweight(equivalent to20,000ppm)withausable,volumeof900gallons.Redundant tankheatersandlineheattracingareprovidedtoassurethatthesolutionismaintained duringnormaloperation ataPage4-18 temperature

(>145F)whichisinexcessofthesolubility limit(approximately 133F).Recirculation ofthecontentsoftheBITduringnormalplantoperation isaccomplished byusingtheboricacidtransferpumps.ShouldtheBITpathbeutilized, isolation oftheBITrecirculation lines'.air-operated valves(fail-closed) willoccureitherasaconsequence ofthelossofoff-sitepowerorbyoperatorprocedural controlforthepost-fire scenario.

RefuelinWaterStoraeTankInadditiontoitsnormaldutytosupplyboratedwatertotherefueling cavityforrefueling operations, theRWSTprovidesboratedwatertoECCSpumps.Thecapacityoftherefueling waterstoragetankisbasedontherequirement forfillingtherefueling cavity.Thisquantityisinexcessofthatrequiredforsafeshutdown.

Technical specification volumeoftheRWSTis350,000gallonsofboratedwaterataminimumof1950ppmboron.Themaximumboricacidconcentration isapproximately 1.4weightpercentboricacid.4.4.2ReactorCoolantSstemTheReactorCoolantSystem(RCS)consistsoffoursimilarheattransferloopsconnected inparalleltothereactorvessel.Eachloopcontainsareactorcoolantpumpandasteamgenerator.

Page4-19 Inaddition, thesystemincludesapressurizer withassociated codesafetyandreliefvalves(PORVs).ReactorCoolantSysteminstrumentation includescold-leg, hot-legtemperatures (wide'ange),

pressure(widerange)andpressurizer waterlevel.Thenaturalcirculation capability oftheplantprovidesameansofdecayheatremovalwhenthereactorcoolantpumpsareunavailable.

Naturalcirculation flowratesaregovernedbytheamountofdecayheat,component elevations, primarytosecondary heattransfer, loopflowresistance andvoiding.Theconditions duringnaturalcirculation relatetomaintaining adequateprimarytosecondary heattransfer, subcooling andinventory.

Forthisanalysisofsafeshutdowncapability, twoofthefourRCSloopswillbemonitored toensurethatnaturalcirculation isestablished andmaintained.

Whileinnaturalcirculation, adequateheattransferandcoolantflowaredependent onadequateinventory inboththeprimaryandsecondary systems.Maintaining waterlevelabovethe"U"tubesonthesecondary sideofthesteamgenerators andadequatelevelwithinthepressurizer arerequiredfornaturalcirculation.

Confirmation offlowwhileinnaturalcirculation isaccomplished throughtheuseoftemperature indications.

Thoseindications arecold-legtemperature (Tc)andhot-legtemperature (Th).Tcshouldattainavaluewhichisafewdegreeshigherthanthesaturation temperature ofthesecondary inventory.

ThshouldattainavaluewhichislessthanatfullPage4-20 powerandhigherthanTc.WhenTcandThattainthevaluesdescribed above,flowandheattransferhavebeenachievedintheassociated RCSloops.ReactorCoolantSysteminventory controlisbasedontheoperation ofCVCSchargingpaths.HighpressuresealwaterfromtheCVCSsystemisinjectedintothereactorcoolantpumpslowerradialbearingchambertopreventleakageofhightemperature reactorcoolantalongthepumpshaft.Theinjection flowsplitsinthebearingchamberwithaportionflowingupthroughtheradialbearingandintotheshaftsealchamber.Theremaining portionflowsdowntheshaft,throughtheRCPthermalbarrierendintotheReactorCoolantSystem.Foraddedoperation flexibility inapost-fire

scenario, thereactorcoolantpumpthermalbarriercoolingpathfromtheComponent CoolingWaterSystemcanbemadeavailable forsafeshutdown.

Maintenance ofeithersealinjection orthermalbarriercoolingprovidesadequateprotection ofthereactorcoolantpumpseals.However,components associated withtheCCWthermalbarriercoolingflowpatharenotrequiredforsafeshutdown.

Pressurizer HeatersSubcooling withintheRCScanbemaintained bycontrolled operation ofthepressurizer heatersandmonitoring ofRCSpressureandloophot-legtemperature (Th).However,thepressurizer heatersarenotrequiredforsafeshutdown.

Asanoptionaloperatoractiontoenhancethecapability ofmaintaining Page4-21 sufficient subcooling margin,aminimumheaterpowerof150kWwillbeavailable fromanyoftheback-upheatergroups.Thisadditional heatwillconservatively coverheatlossesfromthepressurizer atorbelownormaloperating temperature/pressure withnoallowance forcontinuous spray.Underlossofoff-sitepowerconditions, abackupheatergroupcanberepowered fromtheoppositeunit.Pressurizer SafetValvesOverpressurization protection oftheRCSisassuredbythreespring-loaded, self-activated pressurizer codesafetyvalvessetatapressureof2485psig.Thecombinedcapacityofthevalvesisequaltoorgreaterthanthemaximumpressuresurgeresulting fromacompletelossofloadwithoutreactortrip.4.4.3MainSteamSstemsForthepost-,fire

scenario, maintenance ofthesteamgenerator inventory andcontrolofsteamgenerator pressurearerequiredforbothhotstandbyandsubsequent primarysystem.cooldown tosupportthedecayandsensibleheatremovalfunctionwithintheapplicable operational limits.TheMainSteam(MS)Systemconsistsoffourparallelflowpaths,onefromeachsteamgenerator tothemainturbineofthekunit.TheMSsystemwillbeisolatedeitherbyoperation oftheturbinestopvalveorbythesteamgenerator mainsteamstopvalves.Page4-22 Inaccordance withsupporting FSARanalysis, inventory controloftwosteamgenerators issufficient top'rovidethereactorheatremovalfunctionduringnaturalcirculation conditions.

Maintenance ofthesteamgenerator waterlevelduringtheperiodofauxiliary feedwater operation (hotstandby)involvesremoteorlocalmanualpositioning oftheauxiliary feedwater flowcontrolvalvesandoperation ofthemotor-driven orturbine-drivenauxiliary feedwater pumpsbasedonsteamgenerator levelinformation.

Steamgenerator waterlevelandpressureindication areavailable intheControlRoom,onthehotshutdownpanelsandattheLocalShutdownIndication (LSI)stations(locatedattheauxiliary feedwater flowcontrolvalvestations).

TheMSsystemisalsodesignedtodelivermotivesteamtotheturbine-driven auxiliary feedwater pumps.Steamtotheseturbinesissuppliedbybranchconnections upstreamofthesteamgenerator stopvalvesontwosteamlinesineachunit(corresponding tosteamgenerators No.2and3).Eitherlineissufficient tosupplysteamfortheauxiliary

'feedwater pumpturbine,buttwoareprovidedforredundancy.

Theselinesaretiedtogetherwithanormallyopenmotor-operated shut-offvalveandacheckvalveineachlinebeforethecross-tie.

Inthemainsteamenclosures outsideofthecontainment, abankoffivecodesafetyvalvesareinstalled oneachsteamline.Page4-23 Thefivesafetyvalves(twosetat1065psig,twoat1075psig,oneat1085psig)oneachlineareinstalled toprotecttheMSsystemagainstoverpressure andtoprovideacombinedrelieving capacitygreaterthanthemaximumsteamflowrate.Power-0cratedReliefValvesApower-operated reliefvalve(PORV)isprovidedoneachsteamlinewhichiscapableofreleasing thesensibleanddecayheattotheatmosphere.

ThePORVsareusedforplantcooldownbysteamdischarge totheatmosphere sincethesteamdumpsystemisassumednotavailable.

ThePORVshaveatotalcombinedcapacityofapproximately 10<ofthemaximumsteamflow.Fortheassumedfirescenario, aminimumoftwoPORVs,willbeusedtoprovidetheReactorCoolantSystemcontrolled cooldown.

Controlsforthesteamgenerator PORVsareprovidedintheControlRoom,inthehotshutdownpanels,andlocallyattheshutdownstations.

Duringhotstandbyconditions, thesteamgenerator PORVswillbeusedinmanualsteampressurecontrolmode.Thus,theRCStemperature iscontrolled bymaintaining thesteamgenerator atthecorresponding saturation pressure.

4.4.4AuxiliarFeedwater SstemTheAuxiliary Feedwater (AFW)SystemisrequiredduringhotstandbytosupportRCSdecayheatremoval.Forhotstandby,secondary system(steamgenerator) inventory controlisprovidedbytheAFWsystem.Eachunitcontainstwomotor-driven pumpsandoneturbine-driven pumpwhicharededicated toeachunit.InPage4-24

addition, anymotor-driven pumpcanbecrosstiedtotheoppositeunitbytheopeningofonemanualcross-connect valve.Thus,eachunithasthecapability ofreceiving auxiliary feedwater fromfiveseparatepumpsources(fourmotor-driven andoneturbine-driven).

Eachmotor-driven pumpisratedat450gpmandeachturbine-driven pumpisratedat900gpm,withbothflowcapacities beingat1175psigdischarge pressure.

Thepumpshavethedesigncapability ofproviding theratedflowagainstasteamgenerator pressureof1065psig(theloweststeamgenerator safetyvalvesetpoint).

TheAFWsystemisdesignedtodeliverenoughwatertomaintainsufficient heattransferinthesteamgenerators inordertopreventlossof-primarywaterthroughtheRCSpressurizer safetyorreliefvalves.Turbine-Driven AuxiliarFeedwater PumsTheturbine-driven auxiliary feedpump(TDFP)isdesignedtodeliverasufficient flowtoallfoursteamgenerators oftheunitwithwhichitisassociated andmaintainsteamgenerator waterlevelsabovethelowerlimitofthewiderangelevelindicator.

Eachisahorizontal, six-stage, centrifugal pumpdrivenbyasingle-stage atmospheric exhaustturbine.Onautomatic operation mode,theturbinewillfunctionasasinglespeedmachine.However,manualspeedcontrolisavailable intheControlRoom,onthehotshutdownpanelsandlocally.LossofcontrolairtotheturbinegovernorwillresultinthegovernorPage4-25 reverting tothemaximumspeedsetpoint; however,speedcansubsequently becontrolled locally.Twooverspeed tripdevicesareprovided.

Theelectrical overspeed trip,setat115%speed,resetsautomatically afteratrip.Themechanical overspeed trip,device,setat125~speed,mustberesetmanually.

Eachauxiliary feedwater pumpturbinehasitsownself-contained lubeoilsystemutilizing sleevebearingslubricated byashaft-rotary-type pumpdrivenfromtheturbineshaft.Waterforthecoolerissuppliedfromtheauxiliary feedpumpdischarge "line,thusensuringacoolingwatersupplywhenevertheauxiliary feedpumpturbineis'operating.

Steamgenerators No.2and/or3providemotivesteamtotheturbine-driven auxiliary feedwater pump.TheTDFPiscapableofoperating downtoasteampressureof125psia,atwhichtimetheResidualHeatRemovalSystemmaybeplacedinservice.Motor-Driven AuxiliarFeedwater PumsEachunitissuppliedwithtwomotor-driven auxiliary feedwater pumps(MDFP)withonlyonerequiredforsafeshutdown.

Theotherunit'sMDFPsarealsoavailable byopeningcross-tie discharge valves.Eachpumpisahorizontal, eight-stage centrifugal pump.Thepumpsrequirenoexternallubeoilcoolingorothersupportservicesotherthanacpower.Page4-26 Condensate StoraeTanksAthotstandby,theminimumvolumeofwaterrequiredbytheplanttechnical specification fortheCondensate StorageTank(CST)is175,000gallons.ShouldtheCSTsupplybecomeexhausted, thealternate unit'sCSTismadeavailable throughasinglecross-tie, normallyclosed,air-operated valve(fail-closed).Asabackuptoboththesesourcesofmakeupwater,cross-ties totheEssential Service-WaterSystem(ESW)areprovided.

Ampletimeisassumedavailable post-fire foralocalmanualrealignment ofthenormallyclosedvalvesthatisolateESWfrom-.thesuctionof'heauxi.liary feedwater pumps.4.4.5ResidualHeatRemovalSstem'heResidualHeatRemoval(RHR)Systemisdesignedtoremoveresidualandsensibleheatfromthecorebyreducingthetemperature oftheRCSduringthehotandcoldshutdownphasesofsafeshutdown.

TheRHRsystemconsistsoftwoRHRheatexchangers, twoRHRpumpsandtheassociated piping,valvingandinstrumentation necessary foroperational control.ThedesignresidualheatloadisbasedontheresidualheatfractionofthefullcoreMW(thermal) powerlevelthatexists20hoursfollowing reactorshutdownfromanextendedpowerrunnearfullpower.Duringcoldshutdownoperations, reactorcoolantflowsfromtheRCStotheRHRpumpsthroughthetubesideoftheRHRheatexchangers andbacktotheRCS.,Theheatloadistransferred byPage4-27 theRHRheatexchangers totheComponent CoolingWaterSystemwhichiscirculating ontheshellsideoftheheatexchangers.

TheinletlinetotheRHRsystemislocatedinthehotlegofthereactorcoolantloopNo.2whilethereturnlineisconnected tothecoldlegsofreactorcoolantloopsNos.2and3.Twomotor-operated valvesinseries"isolatetheinletlinetotheResidualHeatRemovalSystemfromtheReactorCoolantSystem.'Thereturnlinesareisolatedbycheck-valves inseriesineachlineandacommonmotor-operated valve.Toavoidpotential RCSboundaryleakageatthishigh/lowpressureinterface, oneofthemotor-operated valvesintheRHRsuctionlinewillbekeptclosed(pre-fire condition) withthecorresponding motorcontrolcenterbreakerin.theopenposition.

Aminimumflowreturnlinefromthedownstream sideofeachresidualheatexchanger tothecorresponding pump'suctionlineisprovidedtoassurethattheRHRpumpsdonotoverheatunderlowflowconditions.

Amotor-operated valvelocatedineachminimumflowlinewillbeopenedifRHRpumpflowfallsbelow500gpmandwillbeclosedwhentheflowincreases above1000gpm.Thecooldownrateofthereactorcoolantiscontrolled byregulating theflowthroughthetubesideoftheRHRheatexchangers.

Abypassline,whichservesbothresidualheatexchangers, isusedtoregulatethetemperature ofthereturnflowtotheRCSaswellastomaintainaconstantflowthroughtheRHRsystem.Page4-28 TheRHRsystemcanbeplacedinoperation whenthepressureandtemperature oftheRCSarelessthan400psigand350F,respectively.

Ifoneofthepumpsand/oroneoftheheatexchangers isnotoperative, safeoperation oftheplantisnotaffected; however,thetimeforcooldownisextended.

ResidualHeatRemovalPumsTwoidentical pumpsareinstalled intheResidualHeatRemovalSystem.Eachpumpissizedtodeliversufficient reactorcoolantflowthroughtheresidualheatexchangers tomeettheplantcooldownrequirements.

Asealheatexchanger foreachpumpissupported byoperation oftheComponent CoolingWaterSystem.RHRSafetValvesTheRHRsystemsafetyvalvesprovideRCScoldoverpressure protection whenevertheRHRsystemisinoperation.

Thevalvesarelocatedinsidecontainment, oneeachontheRHRsystemsuctionanddischarge path,anddischarge tothepressurizer relieftank.Thevalvesaresetat450psigand600psig,respectively.

Accumulators Themanualisolation oftheaccumulators isassumedasapost-fire activity.

Theisolation valveateachaccumulator isclosedonlywhentheRCSisintentionally depressurized belowl000psig.Ifthesevalves'ssociated cablesweredamagedbyfires,theisolation isassumedtobeperformed locally,governedbyadequateplantprocedures (post-fire).

Page4-29 4.4.6-ComonentCoolinWaterSstemTheComponent CoolingWater(CCW)Systemisasupporting systemtoothersafeshutdownsystems.Tworedundant trainsareavailable, eachconsisting ofonepumpandheatexchanger andassociated valves,pipingandlocalinstrumentation.

TheCCWsystemforeachunitservesasanintermediate heattransferloopbetweenthevarioussafeshutdowncomponents andtheEssential ServiceWaterSystem(ultimate heatsink).1TheCCWsystemprovidescooling,forthefollowing safeshutdownequipment ineachunit:(1)Residualheatremovalexchangers (2)Centrifugal chargingpumps(a)Mechanical-seal heatexchangers (b)Gearoilcoolers(c)Bearingoilcoolers(d)Sealhousing(3)Residualheatremovalpumpsmechanical-seal heatexchangers (4)Reactorcoolantpumpthermal'arrier heatexchanger Eachunitisservedbytwocomponent coolingpumps,twocomponent coolingheatexchangers, asurgetankandassociated pipingandvalves.Aspareswingpumpisavailable asareplacement foranypumponeitherunitsCCWsystembyvalvingitintotheappropriate CCWheadersandbyconnecting itintotheotherpump'spowersupplyandcontrolcircuitry.

Onepumpandonecomponent coolingheatexchanger perunitfulfilltheheatremovalfunctionduringnormalfullloadPage4-30 operation forvariouscomponents locatedintheAuxiliary andContainment Buildings.

DuringplantcooldowninRHRmode,twopumpsandtwoheatexchangers per'nitarenormallyutilizedtoremovetheresidualheat.Ifoneoftheloopsisnotoperative, onlyoneRHRloopiseffective andcooldownthenisataslowerrate.Thetwocomponent coolingloopsassociated withoneunitareinterconnected downstream fromtheheatexchangers toeffectively formanopenloopsupplyheaderbothforloadswhichareessential andthosethatarenonessential.

Forthepresentanalysisofsafeshutdown, noisolation ofnonessential loadsisassumedtoberequired.

However,inanticipation ofapotentially largecoolingdemand,theoperatorcanisolatethecomponent coolinginlettononessential loadsorshifttotheotherunitscomponent coolingsystembyremotelyand/ormanuallyoperatedvalves.Theessential loads,otherthantheresidualheatexchangers, arenormallyvalvedopentothesupplyheaderandtheydischarge tothesuctionofthecomponent coolingpumpwithwhichtheyarenormallyassociated, sothatcomponent coolingwateriscirculated continuously throughtheessential loadsduringnormaloperation.

Eachofthecomponent coolingoutletlinesfromtheresidualheatexchangers hasanormallyclosedmotor-operated valvewhichmustbeopenedduringRHRcooldown.

Themotor-operated valvesPage4-31 thatisolatetheCCWsystemfromthereactorcoolantpumpthermalbarriercoolersareincludedassafeshutdowncomponents foroperational flexibility inapost-fire

scenario, sincethethermalbarriersperformaredundant functiontothesealwaterinjection cooling.Byappropriate realignment ofpumpsuctionanddischarge headercross-tie valves,oneoftheoppositeunitsCCWpumpsmaybededicated toproviding flowtothefire-affected unit.Asurgetankisconnected tothesuctionsideofthepumps,andmakeuptothesystemissuppliedtothesurgetankfromthedemineralized watersystem.4.4.7Essential ServiceWaterSstemTheEssential ServiceWater(ESW)Systemprovidescoolingforthefollowing safeshutdownheattransferequipment:

(l)Component coolingheatexchangers (2)Emergency dieselgenerator heatexchangers Thesystemalsoprovidesaback-upsupplyofwatertotheAFWsysteminthe'eventthatthecondensate storagetanksaredepleted.

Thissystem,sharedbybothunits,consistsoffourpumps,eachwithitsassociated duplexdischarge

strainer, andtwomainheaders.Eachredundant headerisservedbytwopumps(oneforeachunit)andeachheader,inturn,servesthecorresponding essential loadsinbothunits.Thesecomponents, togetherwiththeassociated heatexchangers, valving,pipinglocalinstrumentation, completetheEssential ServiceWaterSystem.Page4-32 Duringnormaloperation, waterissuppliedthroughthecirculating waterintakepipesfromthelaketothepumpssuctionwelllocatedinthescreenhouse.

TheEssential ServiceWaterSystemcanremovetheheattransferred totheComponent CoolingWaterSystemfromboth.units,plustheheatloadsoftheemergency dieselgenerator enginecoolers(i.e.,theairaftercoolers, lubricating oilcooler,andjacketwatercooler),"theControlRoomairconditioner condensers, andprovidemake-upflowtotheturbine-andmotor-driven auxiliary feedwater pumps.Essential ServiceWaterPumsFourpumpsareinstalled inthecenterportionofthescreenhouse.

Thepumpsareverticalturbinepumpswithenclosedshafts.Grease-lubricated linebearingseliminate theneedforexternalwaterlubrication.

Twopumpsserveeachoneofthetwomainsupplyheaders.Nomorethanthreeofthesepumpsarerequiredinanygivencircumstances toprovidenecessary flexibility ofoperation forbothunits.Twooperablepumpsaresufficient tocarrytheheatremovaldutiesoftwounitsathotorcoldshutdownsimultaneously (atminimumcooldownrate).Localmanualoperation ofmotor-operated valvesiscreditedpost-fire.4.4.8EmerencPowerSstemTheplantEmergency PowerSystem(EPS)includesanon-site,independent, automatically ormanuallystartingemergency powersourcethatsuppliespowertoessential safeshutdownequipment ifthenormaloff-sitepowersourcesareunavailable.

Page4-33 Theemergency powersourceforeachunitconsistsoftwo4l60V,3500kWdieselgenerators.

Eachdieselengineisequippedwithit4ownauxiliaries.

Theseincludestartingair,fueloil,lubeoil,coolingwater,regulator andcontrols.

intakeandexhaustsystem,speed(RPM)CoolingwaterisprovidedfromtheEssential ServiceWaterSystemswhileelectricpowerforeachengine'sauxiliaries isprovidedbyitsowngenerator.

Crankingpowerforeachdieselissuppliedfromitsrespective highpressurestartingairsystem.Energyforstartingadieselisderivedfromtwoairreceivers eachcontaining enoughhighpressurecompressed airtoprovideformultiplestartingsequences.

Therearetwodieselfueloilstoragetanksonsite,physically separated fromeachother.Thepipingisarrangedsothateachstoragetanksuppliesfueltooneemergency dieselgenerator ineachunitwhiletheotherstoragetanksuppliesfueltotheotheremergency dieselgenerator ineachuni't.Twofueloiltransferpumpsperdieselgenerator providetransfercapability fromthestoragetankstotheindividual dieselgenerator daytanks.Theemergency powersourcesforthetwounitsaresimilarandareelectrically andphysically isolatedfromoneanother,asarethedieselgenerator setsforeachunit.Eachdieselgenerator iscapableofsupplying acpowertoonepathofsafeshutdownequipment withonesupplying powerto4kVbusesTllAandPage4-34 TllB(T21AandT21BforUnit2)andtheothersupplying powertoT11CandT11D(T21CandT21DforUnit2).Thedieselgenerators supplypowerto600VbusesllA,llB,11C,andllDthroughthe4160VbusesT11A,TllB,TllC,andT11D,respectively.

Lossofvoltagetothe4160Vdieselbusesaboveissensedbyundervoltage relays.Uponsensing,masterrelaysautomatically starttheemergency generators, tripthenormalfeedcircuitbreakersforthe4160Vdieselbusesandtripallmotorfeederbreakersonthedieselbuses,the600Vbustiebreaker,andallnonessential 600Vmotorfeederbreakers.

Theemergency generator circuitbreakerwhichconnectsthedieselgenerator outputtothe4160/600V bussystemisclosedwhenratedvoltageisobtained.

HVACequipment isavailable toprovidecoolingfortheroomscontaining thedieselgenerators andotherEPSsupportequipment.

SincetheHVACequipment andallassociated powerandcontrolcablingiscontained withintheserooms,separation analysisoftheHVACsystemwasnotrequired.

4160VEmerencPowerSstemEach4160Vdieselbus(T11AandTllB,TllCandT11D)isfedfroma4.16kVdieselgenerator tosupplypowertotheengineered safetyfeaturesandothernecessary equipment intheeventofalossofoff-sitepower.Therearetwodieselgenerators associated witheachunit.Eachdieselgenerator isconnected totwo4160Vbuses,onetobusesTllAandTllBandonetobusesTllCandTllD.Uponlossofpowertoa4160Vdieselbus,thePage4-35 associated dieselgenerator startsautomatically ormanuallybyoperatoraction.Thecircuitbreakerwhichnormally'upplies powertothatdieselbusfromthemain4160Vbusistripped.A4.16kVcircuitbreakerineachbusisautomatically closedwhenitsdieselgenerator isatspeedandratedvoltageand.reenergizes thebus.Thedieselgenerators willthensupplyallequipment whichmustoperateunderemergency conditions fortherespective safeguard train.LowVoltaePowerSstemThe600Vauxiliary systemdistributes powerforalllowvoltagestationservicedemandsotherthanthepressurizer heaters.Thenormalsourceofpowerforthe600Vsystemisthe4160Vsystembusesviathe4160/600V transformers.

Thepressurizer heatersarefedfromthe4160Vsystembusesviatheir4160/480V transformers andindividual loadcentersandmotorcontrolcenters.Thepressurizers heaterscanbeconnected tothediesels.Theswitchgear ismetal-clad with250Vdcoperatedaircircuitbreakers.

The4160/600V transformers arefilledwithnonflammable liquid.The600Vsystemisdividedintosixbussections, fourofwhich(llA,llB,11CandllD)aresafetybuses,llAand11BforonesafetytrainandllCand11Dfortheother.Thepowersourceforeachofthesebusesis1500kVA,4160/600V transformer whoseprimaryisconnected tobusesTllA,TllB,TllCandTllD,respectively.

Bustie-breakers betweenbusesllAandPage4-36 llCandbusesllBandllDareprovidedsothata1500kVAtransformer canfeedtwoadjacent600Vbuses,should'oneofthetransformers fail.Uponsignaltostartthedieselgenerators, the600Vbustiebreakersareopenedautomatically.

Thebustiebreakersand600Vsourcebreakersareinterlocked toeliminate thepossibility ofinadvertent paralleloperation ofdiesels.Asimilar600VsystemisprovidedforUnit2.Two480Vbuses,llPHAandllPHC,arefedfromtwoofthe4.16kVbuses,TllAandTllDrespectively, viatwo1000kVA,4160/480V transformers.

Thesebusessupplypowertothepressurizer heaterloads.Anidentical 480VsystemisprovidedforUnit2.120VACVitalInstrument BusSstemThe120VacVitalInstrument BusSystemconsistsoffourseparatevitalbusesperunitwhicharesuppliedbyfourindependent 5.0kVa,single-phase staticinverters.

Twooftheinverters areconnected tooneoftheunitbatteries, theothertwoareconnected tothesecondbatteryinthesameunit.Theinputtoeachinverterisfroma600Vmotorcontrolcenter,oraD250Vunitbattery.Theoutputofeachinverterisconnected toadistribution Ccabinetthroughanormallyclosedcircuitbreaker.Thedistribution cabinetssupplyalloftherequirednormalsafeshutdowninstrument channels.

Alternative shutdown(LSI)Page4-37 instrumentation isfeddirectlyfrom120Vacdistribution cabinetsineitherthefire-affected orunaffected unit.250VDCSstemThe250Vdcsystemsuppliespowerforoperation ofswitchgear, vitalbusinverters, power-operated valvesandControlRoomemergency lighting.

Thebatterysystemforeachunitconsistsoftwoseparately locatedsetsofleadacidcells.Eachcellbatteryhasitsownactivenormalchargerandawiredstandbycharger.Following alossofunitnormalpower,thebatterychargers areenergized fromtheemergency dieselgenerators.

Thebatterydistribution switchboard consistsofseveralmetal-clad structures, eachwitha250Vdc,two-wireungrounded mainbus,andtwo-polemanually-operated fuseddisconnecting switches.

Duringnormaloperation the250Vdcloadisfedfromthebatterychargers, withthebatteries floatingonthesystem.Uponlossofacpower,theentiredcloadisdrawnfromthebatteries.

Theloadspoweredfromthebatteryincludethedieselgenerator

circuits, 4kVswitchgear, 600Vand480Vloadcenters,electrically-operated valves,ControlRoomemergency lightingand3vitalbusinverters.

Thebatteries aresizedforthreehoursofoperation afteralossofacpower,predicated uponthePage4-38 continuous operation ofalldcemergency equipment.

However,uponstart-upoftheemergency dieselgenerator, thebatterychargersareenergized totakeovertheloadandrechargetheirassociated battery.Alldirectcurrentloadsassociated withengineered safeguards equipment arefullyredundant.

Theseloadsarearrangedsothatonebatterysupplieseachredundant function.

Acircuitisprovidedtocross-tie theABa'ndCDtrainplantbatteries andloadsoneachunit.Thiscircuithasredundant isolating

switches, oneateachpointofconnection tothetwobatterysystems.Undernormalconditions, bothoftheseswitchesarekeptopenandthecircuitdeenergized.

Thetripandclosecoilsforthe4kV,600Vand480Vbreakersareelectrically independent ofoneanotherandmustbeenergized tooperate.Thebreakerswillnotchangepositionifcontrolpowerislost.250VDCBatterNSstemThe250VdcNtrainbatterysuppliespowerfortheoperation oftheturbine-driven auxiliary feedwater pump(TDFP).Thisbatterysystem(perunit)consistsofonebattery(onesetofleadacidcells)andtwobatterychargers, eachsuppliedfromaseparatesafetytrainacbus.ThisNbatteryisphysically andelectrically isolatedfromtheotherunitbatteries.

Thebatterydistribution switchboard consistsofonemetal-cladstructure witha250Vdc,two-wireungrounded mainbus,andtwo-polemanually-operated fuseddisconnecting switches.

Page4-39 Duringnormaloperation, the250Vdcloadisfedfromoneofthebatterychargers, withthe.batteryfloatingonthesystem.Uponlossofstationacpower,theentiredcloadisdrawnfromthebattery.Themajorityoftheloadconsistsoftheelectrically-operated auxiliary feedwater valvesservingthesteamgenerators fromtheturbine-driven auxiliary feedwater pumpsystem,andthesteam.admission valvetotheturbine-driven auxiliary feedwater pump.Theauxiliary feedwater tosteamgenerator valvesarenormallyopenandtheTDFPtripandthrottlevalveisenergized toopen.Theremaining loadconsistsoftheauxiliary feedwater turbinecontrolbus.TheAFWturbinecontrolbusencompasses theAFWturbinestartandtripcircuits, theoverspeed monitor,thetestvalve,andtheemergency leak-offvalve.Thebatteryissizedtoallowanticipated operation ofthevalvesandtheircontrolcircuitswiththebatterychargersandbackupfeedcircuitsdeenergized.

Thebatteryiscapableofservingtheturbine-driven auxiliary feedwater pumpforaslongasthesteamsupplytotheturbineisavailable.

4.5Identification ofSafeShutdownSstemComonentsSubsection 4.4described thespecificsystemswhichwillbeusedtoachievesafeshutdown.

Thissubsection discusses themethodofselection ofsafeshutdowncomponents atD.C.Cook.Foreachsystem,plantflowdiagram(hereafter referredtoasPEIDs,alsorefertoFigures4.6through4.19.2)systemdescriptions, andone-linediagrams(refertoFigures4.20Page4-40 through4.23)wereusedtoidentifythepreciseprimaryflowpathsandoperational characteristics thatmustbeestablished toaccomplish thedesiredsafeshutdownfunction.

Fromthisinformation, alistwascompiledofthecomponents whichparticipate inthesystem'sperformance ofitssafeshutdownfunction.

Thesecomponents are:(1)Activecomponents thatneedtobepoweredtoestablish, orassistinestablishing, theprimaryflowpathand/orthesystem'soperation.

4(2)Activecomponents intheprimaryflowpaththatnormallyareintheproperpositionwhosepowerlosswillnotresultinachangeofposition, butmaybeaffectedbyopen,shortorgroundfaultsincontrolorpowercabling.(3)Power-operated components thatneedtochangepositiontoestablish orassistinestablishing theprimaryflowpath,whoselossofelectrical orairsuppliesresultinthecomponent adoptingtherequiredsafeshutdownpositionbutwhichmaybeaffectedbyopen,shortorgroundfaultsincontrolorpowercabling.(4)Majormechanical components thatsupportsafeshutdown(heatexchangers andstoragetanks).Fromtheanalysisofthesafeshutdownsystemflowpaths,thosecomponents whosespuriousoperation wouldthreatensafeshutdownsystemoperability werealsoidentified (seeTable4-3).Thisidentification includedthosebranchflowpathsthatmustbeisolatedandremainisolatedtoassurethatflowwillnotbesubstantially divertedfromtheprimaryflowpath.SeeSubsection 4.7forthedetaileddiscussion ofspuriousoperations.

Page4-41 Alistwasgenerated forsafeshutdowndevicesincluding deviceidentification, normaloperating status,operating requirements forthevariousshutdownstages(hotstandby,hotshutdownandcoldshutdown),

requiredsupporting

services, andplantlocat'ion.

Thissafeshutdownequipment listforD.C.Cookcontainstheminimumamountofequipment necessary tosafelyshutdowntheunits.Forreasonsofoperational flexibility andtofurtherl1enhancetheconservatisms ofthisanalysis, pathssuchasinjection throughtheboroninjection tank(BIT)andthermalbarriercoolersforthereactorcoolantpumpswereidentified inSections4.3and4.4.Optionalcomponents arenotconsidered safeshutdown.

and,therefore, arenotincludedinthesafeshutdowncomponent listofthisreportorinthecomputerized SafeShutdownSystemAnalysisreport.However,theoptionalcomponents associated withtheBITflowpathare,includedassafeshutdowncomponents.

Thefinalsafeshutdowncomponent listdeveloped forD.C.CookUnitsland2includestheminimumcomponents requiredtoprotectthesafeshutdowncapability fromtheexposurefiredamagepostulated inAppendixR.TheselistsareprovidedasTable4-lforUnitlequipment andTable4-2forUnit2equipment.

Page4-42 4.6Identification ofSafeShutdownCircuitsandCablesThecomputerdatabasedeveloped duringtheD.C.Cooksafeshutdownsystemanalysis(seeprevioussection)wasthebasicinputfortheidentification ofelectrical circuitsessential toensureanadequateequipment performance.

Alltheelectrically-dependent devicesinTable4-'1wereusedtoidentifythecorresponding safeshutdownelectrical

circuits, exceptforthosemotor-operated valvesforwhichmanualoperation wasassumedduringlong-term cooldown(RHR,etc.).Thecircuitsidentified included.

power(4160Vac,600Vac,480Vacand250Vdc),control(220Vac,120Vacand250Vdc)andinstrumentation.

Theidentification andanalysisoftheaboveessential electrical circuitswerebasedonone-linediagrams, elementary circuitdrawings, andcableblockdiagramsfromwhichthenecessary circuitcableswereselectedforthelaterphaseofcableroutingandseparation analysis.

Foreachelectrical circuit,allcircuitcablesthatensureoperability withnodetrimental failureofeachcomponent wereidentified asrequiredforsafeshutdown.

Theexceptions totheabovecriteriaincludedannunciator,

computer, motorstator,heatersandexternalmonitoring circuitsthatareelectrically isolatedformtheelectrical circuitsofconcern.TheD.C.Cookconduitand'ableracewayschedules werethenusedtoidentifytheindividual cablephysicalroutings.

Acomputerdatawasdeveloped tocontainallessential cablesandPage4-43 theirassociated routings.

Foreachsafeshutdownsystem,apackagewasalsodeveloped thatcontained thefollowing information:

(1)Safeshutdowncomponent datasheet (2)Mark-upofcableblockdiagramswithidentified essential cables(3)Databaseoutputwithcableroutinginformation Thisroutinginformation wasextracted andusedtocolor-codeandidentifytheapproximate locationofthesecablesonelectrical cabletrayandconduitlayoutdrawings, bysystemandbyfireareas(seeSection4.8).4.7Associated CircuitsofConcern4.7.1Introduction Theseparation ofprotection requirements of10CFR50,AppendixRapplynotonlytosafeshutdowncircuitsbutalsoto"associated" circuitsthatcouldpreventoperation orcausemaloperation ofshutdownsystemsandequipment.

Theidentification oftheseassociated circuitsofconcernwasihperformed forD.C.Cookinaccordance withNRCGenericLetter81-12andtheStaff'sClarification totheGenericLetter.Thelatterfurtherdefinedtheseassociated circuitsofconcernasthosewhichhaveaphysicalseparation lessthanthatrequiredbySectionIII.G.2ofAppendixR,andhaveoneofthefollowing:

(1)Acommonpowersourcewiththeshutdownequipment andthepowersourceisnotelectrically protected fromthecircuitofconcernbycoordinated

breakers, fuses,orsimilardevices;Page4-44 (2)Aconnection tocircuitsofequipment whosespuriousoperation wouldadversely affecttheshutdowncapability; (3)Acommonenclosure withtheshutdowncables,and,(a)are.notelectrically protected bycircuitbreakers, fusesorsimilardevices,or(b)willallowpropagation ofthefireintothecommonenclosure.

4.7.2Identification ofAssociated CircuitsofCommonPowerSu1andCommonEnclosures Theelectrical distribution systemwasreviewedtoassurethatacceptable coordination andselective trippingisprovidedforallcircuitsontheEmergency PowerSystem.ThereviewwaslimitedtotheEPSsincethereisnoequipment poweredfromthebalanceofplantdistribution systemswhichisrequiredfor,orwhoselossofpowercouldprevent,safeshutdown.

TheEmergency PowerSystemconsistsof:(1)4160Vacswitchgear.

(2)600Vacloadcentersandmotorcontrolcenters(3)480Vacloadcentersandmotorcontrolcentersforthepressurizer backupheaters(4)120Vacvitalinstrumentation buses(5)250Vdcdistribution buses.Electrical circuitfaultprotection wasoriginally designedtoprovideprotection forplantelectriccircuitsviaprotective

relaying, circuitbreakersandfuses.Thisprotective equipment wasdesignedandappliedtoensureadequateprotection ofallelectrical distribution equipment, including cables,fromPage4-45 electricfaultsandoverloadconditions inthecircuits.

Theselection andapplication ofthesedeviceswasinaccordance withtheAmericanElectricPowerdesignpractices.

Theuseofthesedesignpractices assuresthat,forelectricfaultandoverloads, cableshavealevelofprotection whichpreventsdegradation beyondthatwhichwouldbeexperienced bycontinuous operation ofthesecablesattheirratedcurrentvalue.Theoperation oftheseprotective devices,bylimitingcabledamage,alsopreventstheoccurrence ofthesecables.cablefaultswhichcouldcauseignitionof4Anintegralp'artoftheoriginalelectrical systemprotection wasthepropercoordination ofallthesedevices.Suchcoordination assuresthattheprotective devicenearest(inanelec'trical sense)tothefaultoperatespriortotheoperation ofany"upstream" protective devices,andprovidesinterr'uption ofelectrical servicetoaminimumamountofequipment.

Theoriginalelectrical protection designatD.C.Cookrequiredcoordination ofsuchelectrical protective devices.TheseoriginalD.C.Cookelectrical designpractices providedconfidence thatnoassociated circuitsofconcernbycommonpowersupplyorbycommonenclosure TypelexistatD.C.Cook.Asanadditional check,areviewwasconducted oftheexistingelectrical protection andcoordination atD.C.Cookforthesafeshutdownpowersupplies.

Asexpected, mostofthecircuitprotective devicesreviewedhadbeenproperlyselectedPage4-46 andwerecoordinated.

Designchangeshavebeeninitiated tocorrectthefewremaining deficiencies identified duringthereview.Forassociated circuitsofconcernbycommonenclosure Type2,thedesignofthefirepro'tection featuresatD.C.Cookensuresthatnosuchcircuitsexist.Associated circuitsofconcernthatoccurasintervening combustibles areresolvedbyoneorbothofthefollowing methods:(1)Useofnonpropagating cablejacketmaterials (2)Useoffirestopsatappropriate cabletraysectionstopreventdamagetohotshutdownsystemcables4.7.3Surious0erationAnalsisCablesthatarenotpartofsafeshutdowncircuitsmaybedamagedbytheeffectsofpostulated fires.Thiscabledamagemayconsequently preventthecorrectoperation ofsafeshutdowncomponents, orresultinthemaloperation ofequipment whichwoulddirectlypreventtheproperperformance ofthesafeshutdownsystems.Theeffectsofspuriousoperations maybeconceptually dividedintotwosubclasses asfollows:(1)Maloperation ofsafeshutdownequipment duetocontrolcircuitelectrical interlocks betweensafeshutdowncircuitsandothercircuits; forexample,thenumerouspressurizer heaterautomatic operation interlocks fromprocesscontrolandinstrument circuits(2)Maloperation ofequipment thatisnotdefinedaspartofthesafeshutdownsystems,butthatcouldpreventtheaccomplishment ofashutdownsafetyfunction; forexample,inadvertent depressurization oftheReactorCoolantSystemortheMainSteamSystembyspuriousopeningofboundaryvalvesPage4-47 ForSubclassI,adetailedreviewofallsafeshutdowncircuitelementaries wasperformed andallinterlocks toothercircuitswereidentified.

AFailureModesandEffectsAnalysis(FMEA)wasperformed todetermine ifmaloperation oftheseinterlocks (inadvertent openingofclosedcontactsorclosingofopencontacts) wouldpreventtheproperoperation ofthesafeshutdownequipment.

Ifsuchacondition couldoccur,thesafeshutdowncircuitandthemaloperating interlock wereidentified.

ForSubclass2,asystemengineering reviewwasperformed on.plantsystemandequipment thatwerenotpartofsafeshutdownsystemstodetermine whichofthesecomponents hadthepotential todefeatsafetyfunctions bytheirspuriousoperation.

Thesecomponents, theirnormalandtheirunacceptable operating states,alongwiththeirassociated controlcircuits, wereidentified andtabulated.

AFMEAwasperformed forcablesofthesecircuitstodetermine ifconductor-to-conductor shorts,conductor opencircuitsorconductor groundscouldresultin'acomponent transition toanunacceptable state.Ifsuchacondition couldnotoccur,thecomponent wasremovedfromthepotential list.Theaboveexerciseresultsinalistofpotential spuriousoperation candidates forwhicharesolution wasrequiredtoprotectsafeshutdowncapability.

Forthepurposeofconducting theseanalyses, thelossofinstrument airoroff-sitepowerwasassumedonlyforthosecaseswheresuchalosscouldcauseunacceptable consequences.

Page4-48 Alternatively, iftheexistence ofinstrument airoroff-sitepowerresultedinunacceptable consequences, thenthesewereassumedavailable.

Theresultsoftheseanalysesweretabulated andresolution wasachievedby:(1)Providing ameanstoisolatetheequipment whennotnormallyneeded(e.g.,removepowercables,opencircuitbreakers),

or(2)Providing ameanstodetectthenundertaking procedures toofequipment (e.g.,openingspuriousoperation, actuation etc.).spuriousoperations anddefeatthemaloperation ofbreakerstoremoveofamasterswitch,Forthesepotential spuriouscircuitsorcomponents, resolutions areshowninTable4-3and,totheextentnecessary, willbeincorporated intooperating procedures.

Forthepurposeofconducting thesespuriousoperation

analyses, thelossofinstrument airoroff-sitepowerwasassumedwheresuchalosscouldcauseunacceptable consequences.

Alternatively, iftheexistence ofinstrument airoroff-sitepowerresultsinunacceptable consequences, thentheywereassumedavailable.

Inorderforcablefaultsthatgeneratespuriousoperation tooccur,variousconditions mustexistsynergistically atthecablefaultlocation:

(l)Sufficient energymustexistduetothefiretocreatefailureofthecablejacketandinsulating material.

(2)Thefailureofthejacketandinsulating materialmustoccurinawaythatdirectlyexposesthecableconductors.

Page4-49 (3)Foreachshort,twoormorespecificconductors mustcomeintodirectcontactcausinglowimpedence conductor-to-conductor connections.

(4)Forcertaintypesofspuriousoperation, multipleelectrically independent shortsmustoccur.(5)Noadditional conductors thatwouldcausecircuitfaultcurrentsandoperation ofcircuitprotective devicesmayparticipate intheshortcondition.

(6)Nogroundfaultsthatwouldcauseoperation ofcircuitprotective devicesmustoccur.Thespuriousoperation analysisperformed forDonaldC.Cookrecognized theextremely lowprobability ofcertaintypesofthesefaultedconditions.

Thefollowing cableshortconditions causingspuriousoperation wereconsidered ofsufficiently lowlikelihood thattheywereassumednottorequireadditional analysisormodification:

CASEl)Threephase-acpowercircuitcable-to-cable faults(4kV,600Vand480V)CASE2)Twowireungrounded-dc powercircuitcable-to-cablefaults(250V)CASE3)Twowireungrounded-dc controlcircuitcable-to-cablefaults(250V)CASE4)Singlephaseungrounded-ac controlcircuitcable-to-cable faults(220V)WithrespecttoCases1)and2),noconductor-to-conductor faultswithinthesamepowercablecancausespuriouspoweringoftheassociated device.Onlypowercable-to-cable connections betweenonedeenergized andoneenergized powercircuitcouldpermitoperation.

Forthe'aseofthethree-phase-ac circuit,Page4-50 threeelectrically independent cable-to-cable shortsmustoccurwithoutgroundsinordertopowertheassociated device.Similarly, forthetwo-wireungrounded dcpowercircuit,twoelectrically independent cable-to-cable shortswithoutgroundsmustoccur.Thelikelihood ofsuchoccurrences hasbeenacknowledged bytheNRCStafftobesufficiently lowtopermitexcluding suchfaultedconditions fromconsideration (FederalRegisterVol.48,No.86at19963).Thefundamental basisforexcluding suchshortsfromconsideration isbasedontheneedtoprovidemultiplecable-to-cableelectrically independent faultsinorderforspuriousoperation tooccur.WithrespecttoCases3)and4),IndianaandMichiganElectricCompanyhasexcludedsuchcable-to-cable faultscausingspuriousoperation basedonsimilartechnical considerations.

Concerning Case3),alldccontrolcircuitsatD.C.Cookareungrounded.

Inorderforspuriousoperation tooccur,duetocircuit-to-circuit faultsbetweendc,circuitssuppliedfromdifferent sources,ataminimum,twoelectrically independent cable-to-cable shortswithoutgroundsmustoccur.Thisisidentical tothetypeofshortedconditions discussed inCase2).Furthermore, thesamecondition, twoindependent cable-to-cableshorts,mustoccurevenforthosedccircuitssuppliedfromthesamesource.ThisisduetotheIndianaandMichiganElectricCompanydesignstandardthat,ingeneral,requiresthatPage.4-51 thecontrolswitchandrelaycontacts"doublebreak"thepositiveandnegativecontrolleadsforcomponents whosespuriousoperation couldaffectsafeshutdown(e.g.,solenoidandmotor-operatedvalves)(seeFigure4.34).Theimplementation ofthis.designstandardforthesecontrolcircuits(250Vdcand220Vac)atDonaldC.Cookpreventssinglecable-to-cable faultsfrominitiating spuriousoperation.

Fortheungrounded accontrolcircuitsinCase4),theidentical consideration exists.MCCtransformer secondary 220Vaccontrolcircuitsareungrounded.

Therefore, ataminimum,twocable-to-cable shortsmustsimultaneously occurinorderforspuriousoperation toresultforcircuitssuppliedfromdifferent sources.Inaddition, forcircuitssuppliedfromthesamesource',the"doublebreak"IndianaandMichiganElectricCompanydesignstandardwouldrequiretwocable-to-cable independent shortstooccurpriortodevicespuriousoperation.

Thecontrolcircuitcableconstruction atD.C.Cookfurtherdecreases theprobability ofanycable-to-cable faultsduetotheextensive useofasbestos-jacketed controlcable.Asbestos-braidedcablejacketing preventstheintimateconductor-to-conductor contactrequiredforhotshortsbecausethejacketing retainsitsphysicalintegrity forthefullspectrumofexposurefirespostulated.

Inthoseinstallations whereasbestosjacketedcableisnotused,onlyIEEE-383qualified cableexists.Thesecablingjacketcompounds, althoughnotasstructurally impervious Page,4-52 tofireeffectsasasbestos, haveextremely highsoftening temperatures andarenotpronetotheconductor breakthrough phenomena thatoccurwithlowertemperature jacketmaterials suchasPVC.4.7.4SulementarInformation RelatedtoTable4-3Thissectionprovidessupplementary information relatedtoTable4-3,"Potential SpuriousMalfunctions ThatCouldAffectSafeShutdown-Resolution Statements Concerning Procedural Detection andTermination."

Theconceptsofprocedural detection andisolation wereusedintheResolution columnofTable4-3torepresent thefactthatsafeshutdownprocedures wouldcontainsufficient information topermitplantoperating personnel to:(1)Assesstheperformance ofsafeshutdownfunctions usingthesafeshutdowninstrumentation available (2)Identifyonacomponent basisthosecomponents whosespuriousoperation couldbecausingthesafeshutdowninstrumentation off-normal indications (3)Identifyonacomponent basisthespecificoperatoractions,thatcouldbetakentomitigatetheconsequences ofthecomponent's spuriousoperation Thecomponents inTable4-3whoseresolution requirespost-fireoperatoractioncanbesegregated intofivegeneralcategories.

Thesearelistedbelow.Category1:Potential Surious0erationsThatMustBeResolvedforColdShutdownOnlThecomponents inthiscategoryareILS-950,ILS-951,IM0-330,'M0-331, IM0-340,IM0-350,ICM-305,andICM-306.Forthesecomponents, operator.verification ofappropriate systemPage4-53 alignment andcomponent availability willbeprocedurally requiredpriortocoldshutdowninitiations.

Category2:ComonentsThatPermitLetdownfromtheReactorCoolantSstemThesecomponents includeQRV-ill,QRV-112,QRV-160,QRV-161,QRV162gQRV113/QRV114QRV170'RV151NRV152/NRV153NSO-021throughNS0-064.Spuriousoperation ofselectedcombinations ofthesecomponents maycausesufficient uncontrolled letdowntoimpacttheabilityoftheCVCSchargingpumps(150gpmeach)toprovideadequatemakeuptotheReactorCoolantSystem.Monitoring ofpressurizer levelinstrumentation willprovidetheoperatorwithsufficient primaryinformation todetermine thatspuriousoperation iscausinguncontrolled letdowninexcessofavailable chargingflow.Basedonthisandotherbackupinformation thatwilllikelybeavailable, operators willbeprocedurally directedtoinitiatecertainactionsincluding systematically verifying andpaths.isolating allpotential letdownCategory3:CornonentsThatMaImactCVCSMakeuTheonlycomponents inthiscategorywhentheBITinjection lineisutilizedareIRV-251andIRV-252.Theinstrumentation tobeusedandtheactionstobetakenforthesevalvesareidentical tothosediscussed inCategory2.Page4-54 Category4:ComonentsThatAffectMaintenance ofRCSPressureComponents inthiscategoryareQRV-51,LV-459CandLV-460D.1Spuriousoperation ofthesecomponents willbedetectedbymonitoring pressurizer presure,pressurizer levelandreactor0coolantsystemtemperature instrumentation.

Thisinstrumentation willprovideinformation toindicatethat,viaspuriousoperation oftheauxiliary spraylinevalveorlackofpressurizer heaters,reactorcoolantsystempressurecontrolmaybeimpacted.

Procedures willidentifythespecificactionstobetakentoensurethat,shouldpressurecontrolbeimpacted, isolation oftheauxiliary spraylineorappropriate reenergization ofthepressurizer heaterswilloccur.1LV-459CandDarethelowpressurizer levelinterlocks intheheatercontrolcircuits.

Pressurizer heatersarenotrequiredforsafeshutdown.

Heatersareconsidered onlyforoperational flexibility.

2IndianaandMichiganElectricCompanywishestonotethatspuriousoperation oftheauxiliary spraylinevalvemayimpactsafeshutdownonlywhenthenormalchargingpathisutilizedtoprovidereactorcoolantsystemmakeup.Thispathisnotcreditedasproviding reactorcoolantsystemmakeuptoachievesafeshutdown.

Page4-55 Category5:ComonentsThatAffectHeatRemovalviatheSteamGenerators Components inthiscategoryareMRV-213,MRV-223,MRV-233andMRV-243.Spuriousopeningofthesecomponents mayresultinanuncontrolled cooldown.

Instrumentation available todetectexcesscooldownincludessteamgenerator pressureandlevelandreactorcoolantsystemtemperature andpressure.

Shouldsuchexcesscooldownoccur,procedures willidentifyspecificmethodsofisolating andcontrolling theoperation ofthesevalves.4.8Identification ofSafeShutdownEuiment,CablesandRacewaswithinFireZoneBoundaries Thecomponents andcablesrequiredforsafeshutdownwereidentified bytheprocesses described inthepreceding sections.

ThelocationofallSSScomponents byfirezonewasidentified andaddedtotheSafeShutdownComponent List(Table4-1).TheroutingofeachSSScablewasobtainedfromtheD.C.CookCableandConduitSchedules.

Thisinformation wasprogrammed intoadatabaseconcurrently withthefirezonelocationofeverysafeshutdowncabletroughintheplant.Individual cableroutingswereoutputted withthefirezonelocationofalltroughsthatwereapplicable foreachparticular cable.Theroutingofallconduitswasalsoidentified byfirezone.ThecompleterouteofeachSSScableandallthefirezoneseachcableisinweretherebyidentified.

Table4-4isanexampleofthetypeofprintoutdeveloped.

Page4-56 Thisdatabaseinformation wasalsosortedandprintedoutbysystembyfirezone,givingacompletelistingofallSSScablesIIandtheirraceways'ithin allplantfirezones.Anadditional databasewasgenerated, identifying bydivisiontheequipment, troughsandconduitineachfirezoneforeverysafeshutdownsystem.Thislistwasthebasisfordetermining whichfirezonesforeachsystemrequiredadetailedphysicalseparation analysis.

Thefirezonesforeachsystemwhichcontaincablesorequipment ofdifferent redundant divisions hadallcomponents andraceways(troughsandconduits) identified andweremarkedontheplantphysicallocationdrawings.

AnyzonesthatcontaincablesforbothUnitlandUnit2hadthecomponents andracewaysmarkedonthesamesetofphysicallocationdrawingssothatthecommoneffectsofasinglefireonbothunitswouldbereadilyapparent.

Thesemarked-up physicallocationdrawingswereusedtosupporttheseparation evaluation described inthesubsequent section4.9Evaluation oftheSearationofSafeShutdownSstem(SSS)ComonentsandCablesInordertocompleteanevaluation oftheseparation ofSSScomponents andcables,safeshutdownfunctional blockdiagramsweredeveloped.

Thesediagramsareafunctional representation oftheP&IDforeachofthesafeshutdownsystemsanddepictsallofthesafeshutdowncomponents.

TypicalblockdiagramsareprovidedasFigures4.24through4.33.Page4-57 Foreachsystemandeachfirezone,afunctional blockdia'gramwasprepared.

Theidentified foreveryfirezonelocationofSSSequipment wasbyacheckintheproperboxontheblockdiagram.Thelocations byfirezoneofeverycablefor.eachcomponent wasalsoidentified byacheckontheappropriate blockdiagramforeachfirezone.Inordertoensurethatthelossofsupporting systemswouldbeproperlyidentified (suchasalossofportionsoftheelectrical powersystemaffecting therequiredfunctionprovidedbyacomponent ofanothersystem),athirdcheckwasindicated foreachcomponent onthefunctional blockdiagramwheneverasupportsystem(e.g.,powersupply)foracomponent isunavailable duetoafireinthatparticular firezone.Usingthefunctional blockdiagrams, themarked-up physicallocationdrawings, theprintouts ofthecomponents andcablesineachfirezone,thefiredetection andsuppression byfirezonedata,andvariousotherplantdocuments, adetailedfireseparation evaluation ofeachfireareaandzonewascompleted.

Usingthefunctional blockdiagrams, itwasdetermined whetherbothredundant divisions wereunavailable duetoafirewithineachfirearea.Ifbothredundant divisions areaffected, themarked-up physicallocationdrawingswereusedtodetermine theseparation betweentheredundant components and/orcables.Thiswasdonebyfireareaandzoneforallsafeshutdownsystems.Page4-58 Withtheamountofseparation identified andtheexistence (ifany)ofdetection andsuppression inthearea,amethodofcompliance withAppendixR,SectionIII.Gcriteriawasdeveloped.

Anymodifications thatwererequiredweredocumented.

4.10PhsicalInsectionsPhysicalinspections weredoneattheD.C.Cooksitetoverifythebasisfortheanalysisperformed.

Duringtheseinspections, thesafeshutdowncomponent locations wereverifiedtoagreewiththeplantdrawingsandthecomponent byfirezonelist.Thelocationofwalls,wallopeningsanddoorsandthefireratingsofwalls,penetrations, doors,dampers,etc.,weretnoted.Thepresenceofintervening combustible materials orfirehazardswasdetermined.

Thelocation, typeandquantityoffiredetectors ineachfirezonewererecorded.

Theexistence andtypeoffiresuppression systemswerenoted.Asurveywasmadeoftheactualplantroutingsforracewayandwascomparedtothemarked-up physicallocation'rawings andanydiscrepancies werecorrected totheas-builtarrangement.

Thefeasibility ofanypr'oposed modifications wasalsocheckedandnoted.4.11Identification ofAreasofConformance/Nonconformance withAendixR,SectionIII.GTheresultsofthedetailedseparation analysesdescribed inthepreceding sectionsindicate:

(1)ThefirezonesthatmeetthecriteriaofAppendixR,SectionIII.G,Page4-59 (2)Thefirezonesrequiring modifications tomeetthecriteria(3)Thefirezonesthatincorporate equivalent protection andforwhichexemptions arerequested Asummaryoftheresultsofthatanalysisaredocumented inTable1-1ofSectionl.Page4-60 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-,UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS

      • CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESTK-33'CM-250 ICM-251IMO-255IMO-256TK-llIMO-910QRV-251IMO-911PP-50EREFUELING WATERSTORAGETANKBITOUTLETISOLATION MOVBITOUTLETISOLATION MOVBITINLETISOLATION MOVBITINLETISOLATION MOVBORONINJECTION TANKRWSTTOCCPUMPSISOMOV-YARD383838383862ARWSTTOCCPUMPSISOMOVCENTRIFUGAL CHARGINGPUMPE62B62BCHARGINGFLOWCONTROLAOV62AAM-DAZV-AAM-DAZV-AAM-DCRID-IIIAZV-ATllDMCCD'P-50E(LO)

CCPUMPELUBEOILPUMP62BAB-DPP-50WCENTRIFUGAL CHARGINGPUMPW62CTllAMCABIMO-51IMO-52IMO-53IMO-54CS-534BITINJECTION LINEMOVBITINJECTION LINEMOVBITINJECTION LINEMOVBITINJECTION LINEMOVBITINJFROMCHGPUMPCROSS-TIE HEADERPP-50W(LO)

CCPUMPWLUBEOILPUMP62C6666666662CAB-AEZC-CEZC-BEZC-DEZC-APAGE1OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS

  • "*CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENT CS-535CS-536DESCRIPTION SEALINJECTION FROMCHGPUMPCROSS-TIE HEADERCHGPUMPDISCHGTOCROSS-TIE HEADERFIREZONE62C62CPOWERSUPPLIESQMO-200NORMALCHARGINGISOQMO-201NORMALCHARGINGISOQMO-451VCTTOCHGPUMPISOQMO-452VCTTOCHGPUMPISO62A62A44N44NAM-DAZV-AAM-DAZV-APAGE2OF17

~i AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS

      • REACTORCOOLANTSYSTEMCOMPONENT N31N32NLI-151NLP-151NLP-152NLP-153LSI-3NPS-121NPS-122NTR-110NTR-120NTR-130NTR-140DESCRIPTION SOURCERANGEMONITORING CHANNELSOURCERANGEMONITORING CHANNELPRESSURIZER WATERLEVELPRESSURIZER WATERLEVELPRESSURIZER WATERLEVELPRESSURIZER WATERLEVELLOCALSHUTDOWNSTATIONRCSPRESSURE(W.RANGE)RCSPRESSURE(W.RANGE)LOOP1THTEMPERATURE LOOP2THTEMPERATURE LOOP3THTEMPERATURE LOOP4THTEMPERATURE FIREZONE103103122122122122666667676767POWERSUPPLIESCRID-ICRID-IICRID-IVELSCCRID-ICRID-IICRID-IIIELSCCRID-IICRID-IIIELSCCRID-IIICRID-ICRID-IICRID-IPAGE3OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS
      • REACTORCOOLANTSYSTEMCOMPONENT NTR-210NTR-220NTR-230NTR-240SV-45ASV-45BSV-45CLSI-5LSI-6DESCRIPTION LOOP1TCTEMPERATURE LOOP2TCTEMPERATURE LOOP3TCTEMPERATURE LOOP4TCTEMPERATURE PRESSURIZER SAFETYVALVEPRESSURIZER SAFETYVALVEPRESSURIZER SAFETYVALVELOCALSHUTDOWNSTATIONLOCAL-SHUTDOWN STATIONFIREZONE676767676767673312POWERSUPPLIESCRID-IICRID-IICRID-IICRID-IIELSCELSCPAGE4OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS
      • MAINSTEAMSYSTEMCOMPONENT MCM-221MCM-231MPP-220MPP-221MPP-222MPP-230MPP-231MPP-232MRV-223MRV-233SV-1SV-2SV-3MPP-210MPP-211MPP-212MPP-240MPP-241MPP-242DESCRIPTION FIREZONESG2PRESSURESG2PRESSURESG2PRESSURESG3PRESSURESG3PRESSURESG3PRESSURESG2POWEROPERATEDATMOSPHRELIEFVALVESG3POWEROPERATEDATMOSPHRELIEFVALVESG2&3SAFETYVALVESSG263SAFETYVALVESSG263SAFETYVALVESSG1PRESSURESG1PRESSURESG1PRESSURESG4PRESSURESG4PRESSURESG4PRESSURE108108108108108108108108108108108333333333333STEAMSUPPLY(SG2)TOPP-4108STEAMSUPPLY(SG3)TOPP-4108POWERSUPPLIESAM-AAM-DCRID-ICRID-IICRID-IIICRID-ICRID-IICRID-IIICRID-IICRID-IICRID-ICRID-IICRID-IVCRID-ICRID-IICRID-IVPAGE5OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS
      • MAINSTEAMSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESMRV-213MRV-243SG1POWEROPERATEDATMOSPH33RELIEFVALVESG4POWEROPERATEDATMOSPH33RELIEFVALVECRID-ICRID-ISV-1SV-2SV-3MRV-210MRV-220MRV-230MRV-240MRV-211MRV-212MRV-221MRV-222MRV-231MRV-232MRV-241MRV-242SG1,4SAFETYVALVESSG1i4SAFETYVALVESSG1,4SAFETYVALVESMAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVE333333331081083333331081081081083333CCV-CDCCV-ABCCV-CDCCV-ABCCV-CDCCV-ABCCV-CDCCV-ABPAGE6OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS
      • AUXILIARY FEEDWATER SYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESBLP-122BLP-132FMO-221FMO-222FMO-231FMO-232LSI-2BLP-112BLP-142FRV-247PP-3WFRV-257PP-3EFRV-258PP-4SG2WATERLEVEL(N.RANGE)SG3WATERLEVEL(N.RANGE)SG2SUPPLYMOV(PP-4)SG2SUPLYMOV(PP-3E)SG3SUPPLYMOV(PP-4)SG3SUPPLYMOV(PP-3E)LOCALSHUTDOWNSTATIONSG1WATERLEVEL(N.RANGE)SG4WATERLEVEL(N.RANGE)EMERGENCY LEAK-OFFAOV(PP-3W)MOTORDRIVENAUXILIARY FEEDPUMPWEMERGENCY LEAK-OFFAOV(PP-3E)MOTORDRIVENAUXILIARY FEEDPUMPEEMERGENCY LEAK-OFFAOV(PP-4)TURBINEDRIVENAUXILIARY FEEDPUMP101101121212121212012017A17A17D17D17E17ECRID-IIICRID-IIIABNEZC-DABNEZC-DELSCCRID-IIICRID-IIIELSCTllAAFWTllDDCNDCNMCABMCCDPAGE7OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS

"**AUXILIARY FEEDWATER SYSTEMCOMPONENT PP-4/T-TFMO-211FMO-212FMO-241FMO-242LSI-1TK-32BLI-110BLI-120BLI-130BLI-140BLP-110BLP-111BLP-120BLP-121BLP-130BLP-131BLP-140BLP-141FCRV-51CONDENSATE STORAGETANKYARDSG1WATERLEVEL(W.RANGE)66SG2WATERLEVEL(W.RANGE)66SG3WATERLEVEL(W.RANGE)66SG4WATERLEVEL(W.RANGE)66SG1WATERLEVEL(N.RANGE)66SG1WATERLEVEL(N.RANGE)66SG2WATERLEVEL(N.RANGE)66SG2WATERLEVEL(N.RANGE)66SG3WATERLEVEL(N.RANGE)66SG3WATERSG4WATERLEVEL(N.RANGE)66LEVEL(N.RANGE)66SG4WATERLEVEL(N.RANGE)66CONDENSATE STORAGETANK17CCROSS-TIE

.DESCRIPTION FIREZONEPP-4-TRIP 6THROTTLEMOV17ESG1SUPPLYMOV(PP-4)33SG1SUPPLYMOVFROM(PP-3W)33SG4SUPPLYMOV(PP-4)33SG4SUPPLYMOV(PP-3W)33LOCALSHUTDOWNSTATION33POWERSUPPLIESABNABNAZV-AABNAZV-AELSCCRID-IVELSCCRID-IVELSCCRID-IVELSCCRID-IVELSCCRID-IVCRID-IICRID-IVCRID-ICRID-IVCRID-ICRID-IVCRID-IIPAGE8OF17

AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS

"**AUXILIARY FEEDWATER SYSTEMCOMPONENT ESW-109ESW-115ESW-243DESCRIPTION FIREZONESWSUPPLYTOMOTORDRIVEN17DAFWPUMP1ESWSUPPLYTOTURBINEDRIVEN17EAFWPUMPTDSWSUPPLYTOMOTORDRIVEN17AAFWPUMP1WPOWERSUPPLIESFW-129LSI-4AFWCROSS-TIE LOCALSHUTDOWNSTATION17D5ELSCPAGE9OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS

    • "COMPONENT COOLINGWATERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESCMO-410CMO-415CCWHEATEXCHANGER OUTLET44NMOVCCWCOMMONSERVICEHEADER44NISOMOVAM-DAM-DCMO-416CCWCOMONSERVICEHEADERISOMOV44NAM-ACMO-419CMO-420HE-15EHE-15WPP-10EPP-10WCMO-429CCW-167CCW-1721-CCW-173 1-CCW-214 CCWHEATEXCHANGER CCWHEATEXCHANGER COMPONENT COOLINGPUMPECOMPONENT COOLINGPUMPWCCWTORHRHXISOMOV44S44S44S52WESTCCWSUCTIONCROSS-TIE 44SEASTCCWSUCTIONCROSS-TIE 44SWEST,CCWDISCHARGE CROSS-TIE 44SWESTSURGETANK,ISOLATION 69VALVECCWTORHRHXISOMOV44NCCWHEATEXCHANGER OUTLET44NMOVAM-DAM-AT11DT11AMCCDMCAB1-CCW-220 EASTSURGETANKISOLATION 69VALVE1-CCW-256 WESTCCWSUCTIONCROSS-TIE 44SPAGE10OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS
      • ESSENTIAL SERVICEWATERSYSTEMCOMPONENT WMO-705WMO-707WMO-721WMO-725WMO-744WMO-754WMO-753ESWSEPP-7EDESCRIPTION ESWHEADERCROSS-TIE MOVESWHEADERCROSS-TIE MOVESWSUPPLYTODGABESWSUPPLYTODGCDALTERMAKEUPTOPP-3WALTERMAKEUPTOPP-3EALTERMAKEUPTOPP-4FIREZONE11211211411417A17D17EESWPUMP29AESWPUMP1ESTRAINER29AABD-AABD-DABD-AABD-DMANOPERMANOPERMANOPERPS-DTllDMCCDPOWERSUPPLIESWMO-701ESWSWPP-7WWMO-702WMO-731WMO-733WMO-735WMO-737ESWPUMP29BESWPUMPDISCHARGE ISOMOV29BESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOVESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOV44N44N44N44NESWPUMPDISCHARGE ISOMOV29AESWPUMP1WSTRAINER29BPS-DPS-AT11APS-AAM-DAM-DAZV-AAZV-AMCABPAGE11OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS
      • RESIDUALHEATREMOVALSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESIMO-310PP-35EIMO-320PP-35WIMO-312IMO-314IRV-310IRV-311HE-17ERH-117RH-128EIMO-322IMO-324IRV-320HE-17WRH-128WICM-111ICM-129IMO-128RHRPUMPSUCTIONISOMOVRHRPUMPE1C1CRHRPUMPSUCTIONISOMOV1DRHRPUMPWlDRHRPUMPMINIMUMFLOWMOV44CRHRPUMPSCROSS-TIE MOV44CRHRHXFLOWCONTROLAOVRHRHXBYPASSFLOWCONTROLAOVRHRHEATEXCHANGER 44C44CRHRHEATEXCHANGER 44DRHRISOMANUALVALVE(LC)44DRHROUTLETISOMOVRHRINLETISOMOVRHRINLETISOMOV666667,RHRISOMANUALVALVE(LC)44CRHRISOMANUALVALVE(LC)44CRHRPUMPMINIMUMFLOWMOV44DRHRPUMPSCROSS-TIE MOV44DRHRHXFLOWCONTROLAOV44DABV-DTllDABV-ATllAAM-DABV-DCRID-IICRID-IIMANOPERMANOPERAM-AAZV-ACRID-IIIMANOPEREZC-CEZC-CEZC-BMCCDMCABPAGE12OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS
    • "RESIDUALHEATREMOVALSYSTEMCOMPONENT IMO-110IMO-120IMO-130IMO-140DESCRIPTION SIACCUMULATOR ISOMOVSIACCUMULATOR ISOMOVSIACCUMULATOR ISOMOVSIACCUMULATOR ISOMOVFIREZONE66666666POWERSUPPLIESEZC-CEZC-BEZC-DEZC-APAGE13OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS
      • EMERGENCY POWERSYSTEMCOMPONENT TK-47BN1CD1DESCRIPTION DIESELFUELOILSTORAGETANKCD6AB250VDCTRNBATTERYDIESELFUELOILTRANSFERPUMPFIREZONEYARD10613POWERSUPPLIES'/A ABD-C1CD2DIESELFUELOILTRANSFERPUMP13ABD-DABD-CABD-DCDlCD2DGCDABlAB2ABD-AABD-BDGABMCC1-ABD-CMCC1-ABD-DJACKETWATERPUMPJACKETWATERPUMPDIESELGENERATOR CDJACKETWATERPUMPJACKETWATERPUMPMCC1-ABD-AMCC1-ABD-BDIESELGENERATOR AB15151515,151616161611C11DABD-DABD-CTDCDABD-AABD-B11A11BTDABMCCDMCABPAGE14OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS
      • EMERGENCY POWERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESELSC1ABllAB2120VACDISTRIBUTION PNL1-ELSCDIESELFUELOILTRANSFERPUMPDIESELFUELOILTRANSFERPUMP162121ABD-BABD-BABD-APS-APS-DTllAT11BTllcTllD11BllDBCHAB1BCHAB2MCC1-PS-AMCC1-PS-D4KVBUST11A4KVBUST11B4KVBUSTllc4KVBUST11D600VBUS11B600VBUS11D250VDCBATTERYCHARGER1-AB1250VDCBATTERYCHARGER1-AB229E29E40A40A40B40B41414141AB-AAB-DDGABDGABDGCDDGCDTRllBTR11DEZC-AEZC-BMCABMCABMCCDMCCDMCABMCCDEZC-AEZC-BEZC-CEZC-DMCC1-EZC-AMCC1-EZC-BMCC1-EZC-CMCC1-EZC-D414111A11B11C11DPAGE15OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-,UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS
      • EMERGENCY POWERSYSTEM.COMPONENT TRllBTRllD11A'1CCRID-ICRID-IICRID-IIICRID-IVMCABTDABABDESCRIPTION 4KV/600VTRANSFORMER 11B4KV/600VTRANSFORMER llD600VBUS11A600VBUS11C120VACINSTRDISTRPNL120VACINSTRDISTRPNL120VACINSTRDISTRPNL120VACINSTRDISTRPNLTRAINB250VDCDISTRIBUTION CABINETTRAINB250VDCTRANSFERCABINET250VDCBATTERYABFIREZONE4142A42A5353535342C42C42DTllDMCCDTRllATR11CEZC-CEZC-DEZC-AEZC-BTDABMCABMCCDMCCDMCCDMCABMCABAB,BCHAB1 BCHAB2N/APOWERSUPPLIESTllBAZV-AAM-AAM-DDCN11AC11BDTRllATR11CMCC1-AZV-AMCC1-AM-AMCC1-AM-D250VDCTRNBATTERYDISTRCABBUSTIEBREAKERBUSTIEBREAKER,4KV/600VTRANSFORMER 11A4KV/600VTRANSFORMER llC44N5242A4142A42AAB-AllAllDBNMCABMCABTllATllcMCABPAGE16OF17

AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT1TABLE4-1-CONTINUED SAFESHUTDOWNCOMPONENTS

      • EMERGENCY POWERSYSTEMCOMPONENT BCHCD1BCHCD2CDMCCDTDCDDESCRIPTION 250VDCBATTERYCHARGER1-CD1250VDCBATTERYCHARGER1-CD2250VDCBATTERY1-CDTRAINA250VDCDISTRIBUTION CABINETTRAINA250VDCTRANSFERCABINETFIREZONE5555POWERSUPPLIESEZC-DEZC-CN/ATDCDCD,BCHCD1 BCHCD2AB-AIAB-DABNMCC1-AB-AMCC1-AB-D250VDCTRNBATTERYDISTRCAB6N6N6NllAllDDCNPAGE17OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS
      • CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENT TK-33IMO-256IMO-255ICM-250ICM-251TK-llDESCRIPTION REFUELING WATERSTORAGETANKBITINLETISOLATION MOVBITINLETISOLATION MOVBITOUTLETISOLATION MOVBITOUTLETISOLATION MOVBORONINJECTION TANKFIREZONEYARD3939393939POWERSUPPLIESAZV-AAM-DAM-DAZV-AQRV-251CHARGINGFLOWCONTROLAOVIMO-910RWSTTOCCPUMPSISOMOV63ACRID-111AM-DPP-50EIMO-911CENTRIFUGAL CHARGINGPUMPE63BRWSTTOCCPUMPSISOMOV63B63BPP-50E(LO)

CCPUMPELUBEOILPUMPT21DAZV-AAB-DMCCDPP-50WCENTRIFUGAL CHARGINGPUMPW63CT21AMCABIMO-51IMO-52IMO-53IMO-54CS-534BITINJECTION LINEMOVBITINJECTION LINEMOVBITINJECTION LINEMOVBITINJECTION LINEMOVBITINJECTION FROMCHGPUMPCROSS-TIE HEADERPP-50W(LO)

CCPUMPWLUBEOILPUMP63C7474747463CAB-AEZC-CEZC-BEZC-DEZC-APAGE1OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

"""CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESCS-535CS-536QMO-200QMO-201QMO-451QMO-452SEALINJECTION FROMCHGPUMPCROSS-TIE HEADERCHGPUMPDISCHGTOCROSS-TIE HEADERNORMALCHARGINGISONORMALCHARGINGISOVCTTOCHGPUMPISOVCTTOCHGPUMPISO63C63C63A63A44S44SAM-DAZV-AAM-DAZV-APAGE2OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS

      • REACTORCOOLANTSYSTEMCOMPONENT N31N32NLP-151NLP-152NLP.-153NLI-151LSI-3NPS-121NPS-122NTR-210NTR-220NTR-120NTR-130NTR-230NTR-140NTR-240NTR-110DESCRIPTION SOURCERANGEMONITORING CHANNELSOURCERANGEMONITORING CHANNELPRESSURIZER WATERLEVELPRESSURIZER WATERLEVELPRESSURIZER'WATER LEVELPRESSURIZER WATERLEVELLOCALSHUTDOWNSTATIONRCSPRESSURE(W.RANGE)RCSPRESSURE(W.RANGE)LOOP1TCTEMPERATURE LOOP2TCTEMPERATURE LOOP2THTEMPERATURE LOOP3THTEMPERATURE LOOP3TCTEMPERATURE LOOP4THTEMPERATURE LOOP4TCTEMPERATURE LOOP1THTEMPERATURE FIREZONE104104123123123123747575757575757575POWERSUPPLIESCRID-ICRID-IICRID-ICRID-IICRID-IIICRID-IVELSCELSCCRID-IICRID-IIIELSCCRID-IICRID-IICRID-ICRID-IICRID-'IICRID-ICRID-IICRID-IIIPAGE3OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS
      • REACTORCOOLANTSYSTEMCOMPONENT SV-45ASV-45BSV-45CLSI-5LSI-6DESCRIPTION PRESSURIZER SAFETYVALVE.PRESSURIZER SAFETYVALVEPRESSURIZER SAFETYVALVELOCALSHUTDOWNSTATIONLOCALSHUTDOWNSTATIONFIREZONE7575753422POWERSUPPLIESELSCELSCPAGE4OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS
      • MAINSTEAMSYSTEMCOMPONENT MRV-223MRV-233DESCRIPTION SG2POWEROPERATEDATMOSPHRELIEFVALVESG3POWEROPERATEDATMOSPHRELIEFVALVEFIREZONE109109POWERSUPPLIESCRID-IICRID-IIMCM-221MCM-231MPP-220MPP-230MPP-231MPP-221MPP-222MPP-232SV-1SV-2SV-3MPP-210MPP-240MPP-211MPP-241MPP-212MPP-242SG2PRESSURESG3PRESSURESG3PRESSURESG2PRESSURESG2PRESSURESG3PRESSURESG263SAFETYVALVESSG263SAFETYVALVESSG263SAFETYVALVESSG1PRESSURESG4PRESSURESG1PRESSURESG4PRESSURESG1PRESSURESG4PRESSURE1091091091091091091091091093434STEAMSUPPLY(SG2)TOPP-4109STEAMSUPPLY(SG3)TOPP-4109AM-AAM-DCRID-ICRID-ICRID-IICRID-IICRID-IIICRID-IIICRID-ICRID-ICRID-IICRID-IICRID-IVCRID-IVPAGE5OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS
      • MAINSTEAMSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESSV-1SV-2SV-3MRV-213MRV-243SG1,4SAFETYVALVESSG1,4SAFETYVALVES3434SG1,4SAFETYVALVES34SG1POWEROPERATEDATMOSPH34RELIEFVALVESG4POWEROPERATEDATMOSPH34RELIEFVALVECRID-ICRID-IMRV-210MRV-220MAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVE109MRV-230,MAINSTEAMSTOPVALVE109MRV-240MRV-211MRV-212MRV-221MRV-222MRV-231MRV-232MRV-241MRV-242MAINSTEAMSTOPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVEMAINSTEAMSTOPVALVEDUMPVALVE34109109109109CCV-CDCCV-ABCCV-CD"CCV-ABCCV-CDCCV-ABCCV-CDCCV-ABPAGE6OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS
      • AUXILIARY FEEDWATER SYSTEMCOMPONENT TK-32BLP-122BLP-132BLP-112BLP-142PP-3WFRV-247PP-4PP-4/T-TFRV-258PP-3EFRV-257LSI-2FMO-221FMO-231DESCRIPTION CONDENSATE STORAGETANKSG2WATERLEVEL(N.RANGE)SG3WATERLEVEL(N.RANGE)SG1WATERLEVEL(N.RANGE)SG4WATERLEVEL(N.RANGE)MOTORDRIVENAUXILIARY FEEDPUMPWEMERGENCY LEAK-OFFAOV(PP-3W)TURBINEDRIVENAUXILIARY FEEDPUMPPP-4-TRIP 6THROTTLEMOVEMERGENCY LEAK-OFFAOV(PP-4).MOTORDRIVENAUXILIARY FEEDPUMPEEMERGENCY LEAK-OFFAOV(PP-.3E)LOCALSHUTDOWNSTATIONSG2SUPPLYMOV(PP-4)SG3SUPPLYMOV(PP-4)FIREZONEYARD10210212112117B17B17F17F17F17G17G222222CRID-IIICRID-IIICRID-III'RID-III T21AMCABELSCDCNABNDCNT21DMCCDAFWELSCABNABNPOWERSUPPLIESPAGE7OF17 AMERICAN.ELECTRIC POWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS
      • AUXILIARY FEEDWATER SYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESFMO-222FMO-232LSI-1FMO-211FMO-241FMO-212FMO-242BLI-110BLI-120BLI-130BLI-140BLP-110BLP-120BLP-130BLP-140BLP-141BLP-131BLP-121BLP-111ESW-145SG2SUPPLYMOV(PP-3E)SG3SUPPLYMOV(PP-3E)LOCALSHUTDOWNSTATIONSG1SUPPLYMOV(PP-4)SG4SUPPLYMOV(PP-4)22223434SG1SUPPLYMOVFROM(PP-3W)34SG4SUPPLYMOV(PP-3W)34SWSUPPLYTOMOTORDRIVENAFWPUMP1E17GSG1WATERLEVEL(W.RANGE)74SG2WATERLEVEL(W.RANGE)74SG2WATERLEVEL(W.RANGE)74SG4WATERLEVEL(W.RANGE)74SG1WATERLEVEL(N.RANGE)74SG2WATERLEVEL(N.RANGE)74SG3WATERLEVEL(N.RANGE)74SG4WATERLEVEL(N.RANGE)74SG4WATERLEVEL(N.RANGE)74SG3WATERLEVEL(N.RANGE)74SG2WATERLEVEL(N.RANGE)74SG1WATERLEVEL(N.RANGE)74EZC-DEZC-DELSCABNABNAZV-AAZV-ACRID-IVELSCCRID-IVELSCCRID-IVELSCCRID-IVELSCCRID-IVCRID-IVCRID-IVCRID-IVCRID-IICRID-ICRID-ICRID-IIPAGE8OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

"**AUXILIARY FEEDWATER SYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESESW-240ESW-243SWSUPPLYTOTURBINEDRIVEN17FAFWPUMPSWSUPPL'YTOMOTORDRIVEN17BAFWPUMP1WFW-129LSI-4AFWCROSS-TIE LOCALSHUTDOWNSTATION17G5ELSCPAGE9OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS

      • COMPONENT COOLINGWATERSYSTEMCOMPONENT'MO-419 PP-10EPP-10WCMO-410CMO-420CMO-415DESCRIPTION CCWTO'HRHXISOMOVFIREZONE44NCOMPONENT COOLINGPUMPE44SCOMPONENT COOLINGPUMPW44SCCWHEATEXCHANGER OUTLET44SMOVCCWHEATEXCHANGER OUTLET44SMOVCCWCOMMONSERVICEHEADER44SISOMOVT21DMCCDT21AMCABAM-DAM-DPOWERSUPPLIESAM-DCMO-416HE-15EHE-15WCMO-429CCW-167CCW-172CCW-173CCW-214CCW-220CCW-256CCWCOMONSERVICEHEADERISOMOVCCWHEATEXCHANGER CCWHEATEXCHANGER 44S44SCCWTORHRHXISOMOV52WESTCCWSUCTIONCROSS-TIE 44SEASTCCWSUCTIONCROSS-TIE 44SWESTCCWDISCHARGE CROSS-TIE 44SWESTSURGETANKISOLATION 69VALVEEASTSURGETANKISOLATION 69VALVEWESTCCWSUCTIONCROSS"TIE 44SPAGE10OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS
      • ESSENTIAL SERVICEWATERSYSTEMCOMPONENT WMO-706WMO-708WMO-722WMO-726WMO-744WMO-753WMO-754PP-7EWMO-703ESWSEPP-7WWMO-704ESWSWWMO-736WMO-738WMO-732WMO-734DESCRIPTION FIREZONEESWHEADERCROSS-TIE MOVESWHEADERCROSS-TIE MOVESWSUPPLYTODGABESWSUPPLYTODGCDALTERMAKEUPTOPP-3WALTERMAKEUPTOPP-4ALTERMAKEUPTOPP-3EESWPUMP11311311511517B17F17G29CESWPUMP2ESTRAINERESWPUMP29C29DESWPUMPDISCHARGE ISOMOV29DESWPUMP2WSTRAINERESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOVESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOV29D44S44S44S44SESWPUMPDISCHARGE ISO'MOV29CABD-AABD-DABD-AABD-DMANOPERMANOPERMANOPERT21DPS-DPS-DT21AMCCDMCABPS-APS-AAZV-AAZV-AAM-DAM-DPOWERSUPPLIESPAGE11OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS
      • RESIDUALHEATREMOVALSYSTEMCOMPONENT IMO-310PP-35EIMO-320PP-35Wt'ESCRIPTION RHRPUMPSUCTIONISOMOVRHRPUMPERHRPUMPSUCTIONISOMOVRHRPUMPWFIREZONE1GlG1H1HT21DMCCDABV-AT21AMCABPOWERSUPPLIESABV-DIMO-312IRV-310IRV-311IMO-314RH-117RH-128EHE-17EIMO-322IRV-320IMO-324RH-128WHE-17WICM-129ICM-111IMO-128RHRPUMPSCROSS-TIE MOV44,GRHRISOMANUALVALVE(LC)44GRHRISOMANUALVALVE(LC)44GRHRHEATEXCHANGER 44GRHRPUMPMINIMUMFLOWMOV44HRHRHXFLOWCONTROLAOVRHRPUMPSCROSS-TIE MOVRHRISOMANUALVALVE(LC)RHRHEATEXCHANGER RHRINLETISOMOVRHROUTLETISOMOVRHRINLETISOMOV44H44H44H44H747475RHRPUMPMINIMUMFLOWMOV44GRHRHXFLOWCONTROLAOV44GRHRHXBYPASSFLOW44GCONTROLAOVAM-DCRID-IICRID-IIABV-DMANOPERMANOPERAM-ACRID-IIIAZV-AMANOPEREZC-CEZC-CEZC-BPAGE12OF17

AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

~**RESIDUALHEATREMOVALSYSTEMCOMPONENT IMO-110IMO-120IMO-130IMO-140DESCRIPTION SIACCUMULATOR, ISOMOVSIACCUMULATOR ISOMOVSIACCUMULATOR ISOMOVSIACCUMULATOR ISOMOVFIREZONE747474POWERSUPPLIESEZC-CEZC-BEZC-DEZC-APAGE13OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS

      • EMERGENCY POWERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESBN2CD12CD2DGCDABD-DCD10cD2ABD-CDGABABD-AELSCAB1AB2ABD-B2AB2250VDCTRNBATTERYDIESELFUELOILTRANSFERPUMPDIESELFUELOILTRANSFERPUMPDIESELGENERATOR CDMCC2-ABD-DJACKETWATERPUMPJACKETWATERPUMPMCC2-ABD-CDIESELGENERATOR ABMCC2-ABD-A120VACDISTRIBUTION PNL2-ELSCJACKETWATERPUMPJACKETWATERPUMPMCC2-ABD-BDIESELFUELOILTRANSFERPUMP107131318181819191919191921N/AABD-CABD-DTDCD21DABD-CABD-D21CTDAB21AABD-BABD-AABD-B21BABD-AMCCDMCABPAGE14OF17

AMERICANELECTRICPOWERSERVICECORPORATION" D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

      • EMERGENCY POWERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIES2ABlDIESELFUELOILTRANSFER'UMP

~"21ABD-BPS-APS-DAZV-AEZC-AMCC2-PS-AMCC2-PS-DMCC2-AZV-AMCC2-EZC-A29F29F44S45AB-AAB-DAB-A21ATR21B21BEZC-BEZC-CTR21D21DEZC-DBCHAB14KV/600VTRANSFORMER 21B600VBUS21BMCC2-EZC-BMCC2-EZC-C4KV/600VTRANSFORMER 21D600VBUS21DMCC2-EZC-D, 250VDCBATTERYCHARGER2-ABl4545454545T21BTR21B21B21CT21DTR21D21DEZC-AMCABMCCDMCCDPAGE15OF17 AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2"TABIE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

    • "EMERGENCY POWERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESBCHAB2250VDCBATTERYCHARGER.452-AB2EZC-B21A600VBUS21A46ACRID-ICRID-IICRID-IIICRID-IVTDABMCABABT21AT21BT21CT21DDCNAM-AAM-D120VACINSTRDISTRPNL54120VACINSTRDISTRPNL54120VACINSTRDISTRPNL54120VACINSTRDISTRPNLTRAINB250VDCTRANSFERCABINETTRAINB250VDC,DISTRIBUTION CABINET250VDCBATTERYAB4KVBUST21A4KVBUST21B4KVBUST21C4KVBUST21D250VDCTRNBATTERYDISTRCABMCC2-AM-AMCC2-AM-D5446C46C46D47A47A47B47B50525221C600VBUS21C46ATR21ATR21CEZC-CEZC-DEZC-AEZC-BMCABMCCDMCCDMCCDMCABMCABTDABN/ADGABMCABDGABMCABDGCDDGCDMCCDMCCDBN21A21DAB,BCHAB1 BCHAB2PAGE16OF17

AMERICANELECTRICPOWERSERVICECORPORATION D.C.COOK-UNIT2TABLE4-2-CONTINUED SAFESHUTDOWNCOMPONENTS

    • "EMERGENCY POWERSYSTEMCOMPONENT DESCRIPTION FIREZONEPOWERSUPPLIESBCHCD1CDBCHCD2TDCDMCCDTK-47AB-AAB-D250VDCBATTERYCHARGER2-CD1250VDCBATTERY2-CD250VDCBATTERYCHARGER2-CD2TRAINA250VDCTRANSFERCABINETTRAINA250VDCDISTRIBUTION CABINETDIESELFUELOILSTORAGETANKCD&ABMCC2-AB-AMCC2'-AB-D6060606060YARD6S6SEZC-DN/AEZC-CCD,BCHCDl BCHCD2TDCD21A21DABN21AC21BDTR21ATR21C250VDCTRNBATTERYDISTRCABBUSTIEBREAKERBUSTIEBREAKER4KV/600VTRANSFORMER 4KV/600VTRANSFORMER 6S46A4546A46ADCNMCABMCABTllATllcMCABPAGE17OF17 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3POTENTIAL SPURIOUSMALFUNCTIONS THATCOULDAFFECTSAFESHUTDOWNPOTENTIAL SPURIOUSCOMPONENT FRV-245FRV-255FRV-256QMO-200QMO-201QRV-51QRV-111QRV-112QRV-160QRV-161QRV-162QRV-113QRV-114QRV-170LB459CLB4600SYSTEMAFAFCVCSCVCSCVCSRCSEFFECTOFMALFUNCTION SPURIOUSOPENINGWILLDIVERTAFWFLOWTOTHECST.SAMEASABOVE.COMMONPOWERSUPPLYWITHTOFPCONTROLCIRCUITRY.

MAYRESULTINLOSSOFCOMMONPROTECTION.

SPURIOUSOPENINGOFBOTHNORMALCHARGINGVALVESQMO-200ANDQMO-201ANDTHEPRESSURIZER AUXILIARY SPRAYAIR-OPERATED VALVEQRV-51(WITHCVCSPUMPSRUNNING)WILLRESULTINUN-CONTROLLED RCSPRESSUREREDUCTION.

SPURIOUSOPENINGOFQRV-111ANDQRV-112ANDEITHERONEOFTHEORIFICEISO-LATIONVALVESWILLRESULTINUNCON-TROLLEDLETDOWN.SPURIOUSOPENINGOFALLVALVESINSERIESWILLRESULTINUNCONTROLLED EXCESSLETDOWN.SPURIOUSOPERATION OFLOW-LOWPRESSUR-IZERLEVELSWITCHESWILLTRIPPRESSUR-IZERHEATER'SSUPPLYBREAKERSAT480VLOADCENTER11PHAOR11PHC.RESOLUTION CIRCUITBREAKERSATDCDISTRIBUTION PANELSCCV-ABANDCCV-CD(CONTROLROOM)TOBEKEPTOPENDURINGNORMALOPERATIONS (PRE-FIRE)

(EXCEPTDURINGTEST),ENSURINGNOSPURIOUSVALVEOPENING.(AIR-OPERATED VALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)PROVIDESEPARATECIRCUITPROTECTION (FUSE/DISCONNECT SWITCH)ATDCDISTRIBUTION PANELOCN.DISCONNECT SWITCHTOBEKEPTOPENDURINGNORMALOPERATION (PRE-FIRE)

(EXCEPTDURINGTEST),ENSURINGNOSPURIOUSVALVEOPENING.(A'IR-OPERATED VALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)OPERATORVALVEISOLATION ATTHEPRESSURIZER PANELORBYLOCALCLOSUREOFCVCSVALVESQMO-200OR-201WILLENSUREVALVECLOSURE.(AIR-OPERATED VALVEFAILSCLOSEDONLOSSOFAIRORELECTRICAL POWER.)PROCEDURAL ISOLATION OFTHELETDOWNPATHBYOPENINGCIRCUITBREAKERATCONTROLROOMPANELSCCV-ABORCCV-CDORATDCDISTRI-BUTIONPANELSMCABORMCCDWILLENSURELETDOWNISOLATION.

(AIR-OPERATED VALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)(SEEABOVE)HEATERSNOTREQUIREDDURINGTHEFIRST3-4HOURSAFTERTRIP(ATSTABLEHOTSTANDBY).

PROCEDURAL DETECTION ANDDEENERGIZATION OFCONTROLGROUPLOGICCABINETS1AND2(CONTROLROOMS).PAGE1OF3 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3-CONTINUED POTENTIAL SPURIOUSMALFUNCTIONS THATCOULDAFFECTSAFESHUTDOWNPOTENTIAL SPURIOUSCOMPONENT NRV-151NRV-152NRV-153NSO-021NSO-022NSO-023NSO-024NSO-061NSO-062NSO-063NSO-064ICM-129IMO-128ILS-950ILS-951IMO-330IMO-331IMO-340IMO-350ICM-305ICM-306SYSTEMRCSRCSRHRRHRRHRRHRRHREFFECTOFMALFUNCTION SPURIOUSOPENINGOFANYOFTHEPRESSUR-IZERPORVsWILLRESULTINRCSBOUNDARYBREACH.SPURIOUSOPENINGOFPRESSURIZER ORREACTORHEADVENTVALVESWILLRESULTINBREACHOFRCSBOUNDARY.

SPURIOUSOPENINGOFBOTHRHR/RCSBOUNDARYISOLATION VALVESDURINGREACTORMODES1,2,AND3WILLRESULTINBREACHOFTHERCSBOUNDARY.

SPURIOUSOPERATION OFRWSTLOWLEVELSWITCHESTRIPRHRPUMPS.SPURIOUSOPENINGOFANYOFTHECON-TAINMENTSPRAYHEADERISOLATION VALVESDURINGREACTORMODES4AND5WILLDIVERTRCSWATERTOTHECONTAINMENT.

SPURIOUSOPENINGOFANYOFTHERHR/CVCSANDPUMPSUCTIONTIELINESWILLDIVERTRCSWATERTOTHEPRTTHROUGHSAFETYVALVESV-56.SPURIOUSOPENINGOFTHECONTAINMENT SUMPISOLATION VALVESDURINGREACTORMODES4AND5(RHR)WILLDIVERTRCSWATERTOTHECONTAINMENT.

RESOLUTION PROCEDURAL DETECTION ANDCLOSUREOFRESPEC-TIVEBLOCKVALVES(NM0-151, NMO-152,NMO-153)OROPENINGOFPORVCIRCUITBREAKERSATCONTROLROOMPANELSCCV-ABANDCCV-CD,OROPENINGOFDCDISTRIBUTION PANELSBREAKERSATMCABORMCCD.(AIR-OPERATED PORVsFAILCLOSEDWITHLOSSOFPOWERORLOSSOFAIR.)PROCEDURAL DETECTION ANDOPENINGOFRESPEC-TIVESUPPLYBREAKERSATCONTROLROOMPANELSCCV-ABANDSSV-A1.(SOLENOID-OPERATEDVENTVALVESFAILCLOSEDWITHLOSSOFPOWER.)MOTORCONTROLCENTERSUPPLYBREAKERFOREITHERICM-129ORIMO-128WILLBEKEPTOPENDURINGREACTORMODES1,2AND3(PRE-FIRE)

WITHVALVECLOSED.OPENINGOFTESTSWITCHESATCONTROLPANELRHRISOLATESTHELOWLEVELTRIPLOGIC(RHROPERATION ONLY).OPENMOTORCONTROLCENTERBREAKERSFORTHESEVALVES(ATAM-AANDAM-0)ANDVERIFYLOCALVALVEALIGNMENT BEFOREOPERATION OFRHR.OPENMOTORCONTROLCENTERBREAKERSFORTHESEVALVES(ATAM-AANDAM-0)ANDVERIFYLOCALVALVEALIGNMENT BEFOREOPERATION OFRHR.CLOSELOCALMANUALVALVESATTHESUCTIONOFTHERHRPUMPS(RH104EANDW)BEFOREOPERATION OFRHR.PAGE2OF3 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3-CONTINUED POTENTIAL SPURIOUSMALFUNCTIONS THATCOULDAFFECTSAFESHUTDOWNPOTENTIAL SPURIOUSCOMPONENT IRV-251IRV"2521DGTAB1DGTCD2DGTAB2DGTCDMRV-213MRV-223MRV-233MRV"243SYSTEMSISEPSEFFECTOFMALFUNCTION SPURIOUSOPENINGOFBOTHVALVESDURINGCVCSCHARGINGTHROUGHTHEBITPATHWILLPRESSURIZE THEBATSYSTEMANDDIVERTCVCSCHARGING.

SPURIOUSCLOSINGOFANYOFTHESEBREAKERSWILLRESULTINLOADINGTHEDIESELGENERATOR WITHTESTLOADBANK.SPURIOUSOPENINGOFTHESTEAMGENER-ATORPORVs(ASARESULTOF,FIRE-INDUCEDCONTROLCIRCUITFAILURES)

WILLRESULTINUNCONTROLLED COOLDOWN.

RESOLUTION PROCEDURAL DETECTION ANDTERMINATION BYOPENINGCIRCUITBREAKERFOREITHERVALVEATDCDISTRIBUTION PANELCCV-ABORCCV-CD(CONTROLROOM)ORATDCDISTRIBUTION PANELMCABORMCCD(FIREZONES42COR55).(AIR-OPERATEDVALVESFAILCLOSEDWITHLOSSOFAIROFLOSSOFPOWER.)CIRCUITBREAKERSATDIESELGENERATOR LOADTESTPANELSTOBEKEPTLOCKED-OPEN DURINGNORMALPLANTOPERATION (PRE-FIRE)

(EXCEPTDURINGDIESELTEST).PROCEDURAL DETECTION ANDISOLATION BYPLACINGTHEAUTO/MANUAL CONTROLLER INMANUAL(ATTHECONTROLROOMORHSDPANELCONTROLLERS)

ORINTHELOCALCONTROLINTHERESPECTIVE LSISHUTDOWNSTATIONS.

(AIR-OPERATEDPORVsFAILCLOSEDWITHLOSSOFAIRORLOSSOFCURRENTSIGNAL.)PAGE3OF3 STATIONSAFESHUTDOWNFIRFPLUSLOSSFUNCTIONS OFOFF-SITEPOWERREACTORPRO-TECTIONANDREACTORTRIPSWITCKGEAR CONTROLRODINSERTION INITIALREACTIVITY CONTROLRWSTBORATEDWATERSOURCECENTRIFUGAL CHARGINGPUMPS(1OF2)PUMPINGCAPACITYRCPUMPSEALORBITINJECTIONINJECTION PATH~TETHEBITINJECTIONPATHISOPTIONAI.

ANDNOTREQUIREDFORSAFESHUTDOWN.

SOURCERANGEMONITORING INSTRUMENTATION LONG-TERMREACTIVITY CONTROLRCSREACTIVITY CONTROLFIGURE4.1 SAFESHUTDOWNFUNCTIONS STATIONFIREPLUSLOSSOFOFF-SITEPOWERRSWTWATERSOURCECENTRIFUGAL CHARGINGPUMPS(1OF2)PUMPING.CAPACITYRCPUMPSEALORBITINJECTIONINJECTION PATH~OTE'HEBITINJECTION PATHISOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.

CONTROLRCSLEAKAGERCSINVENTORY LOSSCONTROLPRESSURIZER LEVELMONITORING INSTRUMENTATION REACTORCOOLANTMAKEUPCONTROLRCSMAKEUPCONTROLFlGURE4.2 STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONS OFOFF-SITEPOWERPRESSURIZER SAFETYVALVESOVERPRESSURE PROTECTION HI.LOPRESSUREINTERFACE ISOLATION DEPRESSURIZATION PROTECTION AUXILIARY

'PRAYLINEISOLATION PRESSURIZER HEATERSSUBCOOLING MARGINCONTROL/VOTE:THEPRESSURIZER HEATERSAREOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.

RCSPRESSUREMONITORING INSTRUMENTATION RCST~MONITORING INITIALRCSPRESSURECONTROLRHRSAFETYVALVESOVERPRESSURE PROTECTION LONG-TERMPRESSURECONTROLRCSPRESSURECONTROLFIGURE4.3 SAFESHUTDOWNFUNCTIONS STATIONFIREPLUSLOSSOFOFF-SITEPOWERSTEAMGENERATORS (2OF4)HEATTRANSFERPATHAUXILIARY FEEDWATER (1OF3)PUMPINGCAPACITYSTEAMGENERATOR SAFETYVALVEANDPORVHEATRELEASEPATH.STEAMGENERATOR INLETMOV'sINJECTION PATHRCST~ANDTcMONITORING NATURALCIRCULATION INITIALREACTORHEATREMOVALSTEAMGENERATOR PRESSUREANDLEVELMONITORING STEAMGENERATOR INSTRUMENTATION RHR(1OF2)CONDENSATE STORAGETANKWITHESSENTIAL SERVICEWATERBACKUPSECONDARY WATERSOURCELONG-TERMHEATREMOVALREACTORHEATREMOVALFlGURE4.4 00 SAFESHUTDOWNFUNCTIONS CVCSAFWEPSCCWESWEPSEPS(MDFP'sONLY)ESWEPSEPSCCWMS(TDFPONLY)ESWESWESW(BACKUP)RCSMSRHREPSEPSEPSCCWESWSUPPORTING SYSTEMINTERACTION DIAGRAMFIGURE4.6 0

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OMK.TGN11H5411tr4411'H14111~C4SI'4IHave450111NWIMVeuICPM3el"vnss7~rver'e-(OKI)MSC.eeu(Hs)luv.110(HNItc140e.t~IEf<63)0H.PTORE(NB5SOArs'(53.016,>.'..3SIL223P51r~I0IIFLOORELEV.633'-0 OR81L\aoNtlCR8)t(ADN!4TOLEFIIl'lr(reNCNSTOPVaLvf--,22G-CPN4141.1'HS>>04'I'4.I'Mrfell321MIMMPF242(H14I'fDML(se(catore SlcPYa(taeDHr,rrs~IlFKRFCRATKC 1stNSBZXIZZAW(T'YPICAL)

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(<tpf(agHSIterRxet1l(R/h3112,HVec1Ifl/2XaeleetI,II/2Mta220220N\1st2H'1'+HSeeS1Svlt~eBYG(//I5(10265(ATDRAINR4-)0TURB'>>BYPASS(SR IIIIfvs,l.~.Nt17~LvtAseutetr(4)STOPva(v(51/Mt2)Mr1.iiJI/2=)2MPIFPOMSTSAM'Gtu<RAYIIR erst4:sesIOevotltlttPICALe-LtfTCVI(RCf4)CONTROLVALVf5)CA<MSt(AH10TUR61NKSEE'tHIS&/6N/I(ttrlvaL)

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5.ALTERNATIVE SHUTDOWN5.1Introduction ForvariousD.C.Cookplantfirezones,compliance withtheprovisions ofSectionIII.G.2cannotbeeffectively oreconomically achievedduetotheconfiguration andcongestion ofsafeshutdownequipment, cablesandassociated circuits.

FortheseareasIndianaandMichiganElectricCompanyhasdetermined thattheappropriate technical approachnecessary tocomplywiththeprovisions ofSectionIII.GofAppendixRistoprovideanalternative shutdowncapability.

Thissectionprovidesadescription ofthealternative shutdownsystemdesignstobeusedtoachievecompliance inalltheseplantareas.Thissectionsalsoprovidessufficient information totheNRCforreviewoftheproposedplantmodifications necessary toprovidethesealternative shutdowncapabilities.

Inaddition, thissectionrespondstotheinformation requestscontained intheNRCStaff'sclarifications toGenericLetter81-12datedMarch22,1982,

SUBJECT:

FireProtection Rule-AppendixR.Thealternative shutdownmethodsproposedbyIndianaandMichiganforeachspecificfirezoneprovidetheabilitytoachieveandmaintainsubcritical activityconditions inthereactor,maintainreactorcoolantinventory, achieveandmaintainhotstandbyconditions, andachievecoldshutdownconditions within72hoursandmaintaincoldshutdownconditions thereafter.

Page5-1 Thealternative shutdownmethodsselectedensurethatnofuelcladdingdamage,ruptureoftheprimarycoolantboundary, orruptureofthecontainment boundarywilloccur.Thealternative shutdownmethodsselectedhavethecapability to:(l)Achieveandmaintaincoldshutdownreactivity conditions; (2)Maintainreactorcoolantlevelwithinthepressurizer levelindication range;(3)Removereactordecayheatduringhotstandby,hotshutdownandcoldshutdown; (4)Providemonitoring ofappropriate processvariables necessary t:ocontrolalternative shutdownequipment; and,(5)Providetheprocesscooling,lubrication andotherassociated supporting functions necessary topermittheoperation oftheequipment usedforsafeshutdown.

Fivealternative shutdownmethodshavebeenproposed.

RefertoSection5e3foradetaileddiscussion ofeachmethod.TheImethodsvaryfromacompletealternative shutdownmethodthat,withtheexception ofinstrumentation, requiresnoactiveSSSequipment inthefireaffectedunit,tothesimpleuseoflocalpneumatic loadingstationstocontrolsteamgenerator PORVs.The"Complete Alternative Shutdown" methodisavailable toachievesafeshutdownforareassuchasthecablevaultsandControlRooms.Thevarious-othersafeshutdownmethodsproposedareselectedsubsetsofthe"Complete Alternative Shutdown" method.Page5-2 Theequipment andcablesforeachofthealternative shutdownsystemsareseparated fromthefirezonesofconcerninaccordance withSectionIII.G.2;'pecificexemptions fromtheprovisions ofIII.G.2areidentified inSection7.0.Theselectedalternat,ive shutdownmethodsaccommodate bothconditions whenoff-sitepowerisorisnotavailable.

Theequipment andsystemscomprising eachofthealternative shutdownmethodsarecapableofbeingpoweredbybothon-siteandoff-siteelectrical powersystems.Therequiredequipment andsystemsforachieving hotstandbyarecapableofmaintaining suchconditions untilhotshutdownactionsarecommenced.

Thenumberofoperating shiftpersonnel exclusive offirebrigademembersrequiredtooperatesuchequipment andsystemsshallbeon-siteatalltimes.Theequipment andsystemscomprising themeansofachieving andmaintaining hotshutdownandcoldshutdownconditions willbemadeoperableandcoldshutdownachievedforallalternative shutdownmethodswithin72hours.Thematerials andprocedures requiredtoachievethealternative shutdownmethodswillbeavailable on-site.5.2Alternative ShutdownSstemDescritionAsstatedinthefootnoteto10CFR50AppendixR,SectionAlternative shutdowncapability isprovidedbyrerouting, relocating ormodification ofexistingsystems;dedicated shutdowncapability isprovidedbyinstalling newstructures andsystemsforthefunctionofpost-fire shutdown.

Page5-3 Historically,'lternative shutdownsystemsprovidedbylicensees tocomplywiththeprovisions ofAppendixRinvolved:

(1)Electrical isolation, viatheuseofisolation andtransferswitches, ofthoseelectrical circuit.cablesandequipment thatcanbeimpactedbythefire,and(2)Re-establishment ofthoseelectrical circuitfunctions andequipment operation bytransferofcircuitcontroltolocalcontrolstations.

Insomecasesthisisolation andtransferofcontrolisprovidedasonealternative systemfortheareasr'equiring alternative shutdown(suchasControlRoomsandtheassociated cablevaults).Inothercases,thisisolation and.transfer of*controlisuniquelyprovidedforeachzonerequiring alternative shutdown.

Althoughacceptable asamethodof'ompliance withAppendixR,thesemodifications tosafety-related equipments andcircuitsareundesirable forvariousreasons.First,theadditionofnewequipment andcablingincreases theprobability ofsafetycircuitmalfunctions duetofailureormaloperation oftheequipment.

Second,theadditionofalternate controllocations outsidetheControlRoomcreatesthepotential forinadvertent ormalicious actionsthatcouldcauselossofsystemscontrolfromtheControlRoom.Dedicated shutdownsystemshavealsobeenproposedtoachievecompliance withAppendixR.Byproviding acompletely independent meansofachieving safeshutdown, such'ystems donotPage5-4 typically createsuchadverseimpactsonexistingsafetysystems,butdorequireextensive andcostlyplantmodifications andlongprojectcompletion times.Duringitsreviewofotheravailable alternatives toachievesafeshutdown, IndianaandMichiganrecognized thatanumberofinherentD.C.Cookplantfeaturesexistthatcouldbeusedtoachievesafeshutdownviasomeotheralternative means.Afewoftheseimportant featuresare:(1)EachunithasitsownControlRoomandassociated cablespreading areaseparated bythree-hour firebarriers, withtheexception ofthecommonconnecting door+(2)Thetwounitsareprovidedwiththeirownindependent andredundant on-siteemergency powersystemsthatmeetSectionIII.Gseparation criteriabetweenunits.TheUnit1dieselgenerators anddistribution equipment arelocatedonthenorthendoftheplant,andthe'Unit2dieselgenerators anddistribution equipment arelocatedonthesouthendoftheplant.(3)Theothermajorsafeshutdownsystems(ESW,CCW,AFW)arealsoindependent train-oriented redundant systemsthatpresently havecross-ties betweenunits.(4)Ingeneral,goodphysicalUnit1/Unit2separation ofequipment, circuitsandcablesexists,withUnit1systemsand'quipment occupying thenorthsideoftheplant'seast-west centerline andUnit2occupying thesouthsidearea.(5)FewplantfirezonescontainbothUnit1andUnit2equipment orcables.Theseandotherattributes suggested that,ingeneral,hypothesized firesifproperlycontained wouldaffectthesafeshutdownsystemsofonlyoneofthetwoD.C.Cookunits.Theotherunit'ssafeshutdownsystemswouldingeneralbePage5-5 unaffected, withallredundant trainsfreeoffiredamage.Thisavailability ofallsafeshutdownpathsintheunaffected unit,whencombinedwiththeexistingunitmanualcross-ties, suggested thatahighlypreferred alternative shutdownapproachcouldbedeveloped usingthesafeshutdownsystemsoftheunaffected unit.Studieswereinitiated toreviewthecapability ofthesafeshutdownsystemsintheunaffected unittosupportAppendixRsafeshutdownrequirements inthefire-affected unitandtomaintainstableplantoperating modesintheunaffected unit.Thestudiesconfirmed thatwithminormodifications thesafeshutdownsystemsprovidedsuchacapability.

Variousalternative shutdownmethodswereultimately selectedtoaccommodate thevariousplantareasunderconsideration.

Theseareallsubsetsofthecompletealternative 0shutdownmethodthatwasoriginally selectedtoaccommodate theeffectsofcablevaultandControlRoomfires.Thecompletealternative shutdownmethodselectedby?6MforsafeshutdownistousethesafeshutdownsystemsoftheD.C.Cookunitunaffected bythehypothesized firetoachievesafeshutdowninthefire-affected unit.Thisalternative shutdownmethodi.stechnically preferred overothermethodsrequiring

.extensive circuitisolation andmodifications, andcanbeeasilyimplemented post-fire bytheplantoperating staff.Afterincorporation ofthevariousproposedmodifications andwiththeexception of.Zone44S,onlythesafeshutdownsystemsusedtoPage5-6 providealternative shutdownofeitherUnit1orUnit2willexistinanyonefirezonethatrequiresalternative shutdown.

Sections4.2through4.4previ'ously providedthedefinitions ofthesafeshutdownfunctions, primaryandsupportsystems,andequipment, requiredtoachievesafeshutdown.

Figures4.1through4.5depictthesafetysequences usedtoachievenormalsafe~shutdown.

Modifications tothosefiguresareprovidedasFigures5.1through5.4.Themodifications depictthesafetysequences usedtoachievecompletealternative safeshutdown.

Thefollowing isadiscussion oftheexistingplantfeaturesandrequiredmodifications onasystem-by-system basis,whichwillpermitthesafeshutdownsystemsoftheunaffected unittoserveasthecompletealternative shutdownsystemforthefire-affectedunit.5.2.1ChemicalandVolumeControlSstemForthosefirezoneswherehypothesized fireswillcreatealossofthefire-affected unit'sCVCSsystem,thefunctions ofthesystemwillbeachievedbythe'peration ofaproposed'our-inchcentrifugal chargingpumpdischarge headercross-tie linebetweenUnit1andUnit2.Manualoperation oftheline'isolation valves,inZone5,willachieveimmediate RCSmake-upviatheRCPsealinjection pathor,withsomemanualsystemalignment, boroninjection tankpath.'igure5.5isahighlighted PAIDofthisproposedcross-tie modification.

Page5-7 5.2.2AuxiliarFeedwater SstemForthosefirezoneswheretheoperability ofallthreetrainsofauxiliary feedwater canbethreatened duetohypothesized fire,theshutdownfunctions oftheAFWsystemwillbeachievedbymanuallyopeningexistingmotor-driven AFWpumpdischarge headercross-tie valvesalongwithinitiation andalignment oftheassociated equipment inoneoftheunaffected unit'smotor-driven auxiliary feedwater trains.Localindication ofthesteamgenerator levelandpressure, presently locatedatlocalpanelsLSI-1andLSI-2,willbeupgradedandrepowered fromtheunaffected unit'sEPS.Steamgenerator levelcontrolwillbeachievedbymanuallythrottling theaffectedunit'ssteamgenerator inletMOVslocateddirectlyadjacenttolocalpanelsLSI-1andLSI-2.Figure5.6isahighlighted P&IDofthisexistingcross-tie method.5.2.3Essential ServiceWaterSstemAsdiscussed inSection4.4.7,theESWsystemasasupporting systemisnecessary todirectlysupportthecoolingneedsoftheComponent CoolingWaterandEmergency PowerSupply(dieselgenerator)

Systems.Forthefirezonesrequiring completealternative

shutdown, withtheexception ofFireZones29(A,B,E),

29(C,D,F),

theESWsystemsofthefire-affected unitareassumedunavailable andarenotrequiredtoachievestablehotstandby.Page5-8 Forhotshutdownandcoldshutdown, operation ofthefire-affectedunit'sRHRsystemwillrequiremanualrealignment ofcertainESWflowpaths.Thisrealignment willdivertaportionoftheunaffected unit'sESWflowtoaCCWheatexchanger inthefire-affected unit.Thisdiversion incombination withasimilarrealignment ofCCWwillprovidecoolingwatertooneRHRpumpandheatexchanger inthefire-affected unit.ForFireZones29(A,B,E) and29(C,D,F),

theonlyalternative shutdownsystemrequiredistheunaffected

.unit'sESW.Fortheseareasthediversion ofsufficient ESWflowfromtheunaffected unittotheaffectedunitprovidestherequiredESWsupportforallsafeshutdownsystemsinthefire-affected unit.Thisdiversion isachievedvianormallyopenunitcross-tie MOVsthatarefreeoffiredamageforfireswithinFireZones29(A,B,E) and29(C,D,F).

Asdiscussed inSection4.4.7,theESWsystemissharedbybothunits.Twooperablepumpsare.sufficient tocarrytheheatremovaldutiesoftwounitssimultaneously throughhotandcoldshutdown(ataminimumcooldownrate).Figures5.7.1and5.7.2arehighlighted PGIDsofthisexistingcross-tie method.Thecontrolcircuitsforbothunits'SWpumps,strainers anddischarge valvescurrently existinvariouszonesrequiring alternative shutdown.

InordertoensurethatfiresincertainzoneswillnotcausefailuresinallfourESWtrains,circuitmodifications areproposedthatincludetheinstallation ofPage5-9 isolation relaysandcablererouting, toensurethatbothtrainsofESWintheunaffected unitwillbeavailable forallareasrequiring alternative shutdown.

5.2.4ComonentCoolinWaterSstemAsdiscussed inSection4.4.6,forhotstandbytheCCWsystemasasupporting systemisnecessary toprovidethecoolingneedsofthecentrifugal chargingpumpsand,foroperat,ional flexibility, thecoolingneedsoftheRCPseals.Forhotshutdownandcoldshutdown, thesystemalso'rovides coolingfortheRHRpumpsandRHRheatexchangers.

Forallfirezonesrequiring alternative

shutdown, thefire-affectedunit'schargingpumpsandRCPthermalbarriercoolingarenotrequired.

Forthesezones(excluding 44S)theuseoftheunaffected unit'scentrifugal chargingpumpsprovidesadequateprimarysystemmake-upviathesealinjection path.Forhotshutdownandcoldshutdowninthefire-affected unit,CCWmustbeprovided"toaminimumofoneoftheaffectedunit'sRHRpumpsandheatexchangers.

Thisisachievedbymanualrealignment ofexistingCCWinter-unit cross-ties toprovideCCWflowfromtheunaffected unit'sCCWpumpstotheappropriate CCWheatexchanger andRHRheatexchanger inthefire-affected unit.Shouldre-establishment ofRCPthermalbarriercoolingbechosen,earlierrealignment oftheCCWinter-unit cross-tie maybeperformed butthisisoptionalandnotarequiredoperation toachievesafeshutdown.

InordertoensurethatafireinvariousPage5-10 zonesrequiring alternative shutdownwillnotcausefailuresofallfourCCWpumps'ircuitry, modifications areproposedthatwillisolate,viacontrolcircuitrelays,thesuspectcable.TwoCCWpumpsintheunaffected unitaresufficient tosupportallrequiredcoolingdemandsforbothunitswhensuchalternative shutdownisrequired.

BothUnit1andUnit2chargingpumpsexistinFireZone44S.Modifications areproposedtoinstallaone-hourfirebarrierbetweentheUnit1andUnit2CCWpumps.ThiswillensurethesurvivalofeithertheUnit1orUnit2CCWpumpsTherefore, forafireinFireZone44SthatdisabledtheUnit1CCWpumps,safeshutdowncouldbeachievedbyusingtheUnit2,CCWpumpseventhoughthisareaisacompletealternate shutdownareaforUnit2according toTable5-1.Figure5.8isahighlighted P&IDofthisexistingcross-tie method.5.2.5MainSteamAsdiscussed inSection4.4.3,initialhotstandbyheatremovalisachievedviathe'operation ofsteamgenerator safetyvalves.Subsequent heatremovalwillbeachievedviaoperation ofthesteamgenerator power-operated reliefvalves(PORVs).Foralternative

shutdown, manualoperation ofthePORVsfromlocalcontrolstationsnearLSI-1andLSI-2willbeachievedviapneumatic valveloadingcontrolswithbackupmotivepowerprovidedbythepermanent plantN2accumulator anddistribution Page5-11 header.ThePORVsalsohavethecapability tobeoperatedbyexistingmanualhandwheels.

Figure5.9isasketchoftheproposedlocalpneumatic PORVcontrols.

5.2.6ReactorCoolantSstemForfirezonesrequiring completealternative shutdownandforotherzonesrequiring selective alternative

shutdown, RCSinstrumentation, whichincludessourcerangemonitoring, hotlegwiderangetemperature, coldlegwiderangetemperature, pressurizer widerangelevelandpressure, mustbeavailable.

LocalpanelLSI-'3presently containslocalindication ofpressurizer levelandpressure.

AnewLocalShutdownIndication panelLSI-4,locatedadjacenttoLSI-3,willincludenewsourcerangemonitoring alongwithhotandcoldlegtemperature monitoring.

Theadditionofthenewdedicated nonsafety-related instrument channelscoupledwithrepowering ofthenewinstrument channelsandtheexistingchannelsfromtheunaffected unit'sEPSprovidethenecessary equipment functions inthosezonesrequiring alternative shutdown.

5.2.7EmerencPowerSstemAsdiscussed inSection4.4.8,theEPSprovidessupporttoallsafeshutdownsystems.Forallfirezonesrequiring completealternative

shutdown, thefire-affected unit'sEPSarenotrequiredforhotorcoldshutdown.

TheEPSoftheunitunaffected bythehypothesized firewillprovidethenecessary Page5-12 electrical, powergeneration anddistribution forthealternative shutdownsystems.Variousequipment (pressurizer backupheaters,instrumentation andRHRpumps)intheaffectedunitcannotbeusedtosupportshutdownbecauseoftheassumedtotallossofEPSinthatunit.Thisequipment inthefire-affected unitwillbemadeavailable byrepowering theequipment fromtheunaffected unit'selectrical powersources.Forinitialhotstandby,repowering isonlyrequiredforthevariousinstruments providedonthelocalpanelsLSI-l,LSI-2,LSI-3,LSI-4,LSI-5andLSI-6.Modifications totheexistingLSIpanelswillbem.-detoprovidelocalmanualselection ofUnit1orUnit2powersources.Figures5.12.1and5.12.2depictinone-linediagramformthenewLSIpowersources.Figure5.13isatypicalelementary diagramshowingtheindividual LSIpanelpowercircuitselection.

Forextendedhotstandby,inadditiontotheinstrumentation previously discussed, repowering ofonegroupofpressurizer backupheatersmaybenecessary.

Thisactivityisconsidered arepairandwillusepermanently-installed jumperpowercablesandretermination oftheheaters.Figure5.22istheone-linediagramshowingthisrepowering.

Amoredetaileddiscussion ofthishotstandbyrepairisprovidedinSection6.2.Page5-13 Forhotshutdownandcoldshutdown, repowering ofoneRHRpumpfromtheunaffected unitmayalsoberequired.

Reference Section6.3foradetaileddiscussion ofthisrepairactivity.

5.2.8ResidualHeatRemovalHotshutdownandcoldshutdownrequireoperation oftheRHRsystem.OnetrainoftheRHRSysteminthefire-affected unitwillbeavailable byrepowering ofoneRHRpump(seeSection5.2.7),andmanualalignment oftheassociated RHRSystemvalves.5.3Alternative ShutdownMethodsFivealternative shutdownmethodsarerequiredtoensurecompliance withthe'rovisions ofAppendixRSectionIII.G.Table5-1providesali..tingofthefirezonesrequiring alternative shutdownandthespecificalternate shutdownmethod(s) requiredtoachievesafeshutdownforeachfirezone.5.3.1MethodAS1MethodASlisdescribed as"Complete Alternative Shutdown" and"mayrequiretheuseofallthealternative shutdowncapabilities discussed inSection5.2.Section5.2providedinformation andadiscussion ofthesystemsandequipment usedtoprovidethiscompletealternative shutdowncapability.

Thefirezonesrequiring thisformofalternative shutdownhavesubstantial portionsofthenormalsafeshutdownsystemslocatedinthezone.Thelocationandcongestion ofthisequipment issuchthatcompliance withAppendixRSectionIII.G.2cannot'be rationally achieved.

Page5-14 Forthepurposesofthisanalysis, intheareas"requiring MethodASl,allnormalshutdownequipment canbeassumedunavailable.

Thezonesrequiring thismethodcanbedividedintofourgeneralgroupings.

First,FireZones53,54,55,56,57,58,59,60,144and145aretheControlRooms,cablevaultandhotshutdownpanelareasforbothunits.Becauseofthenatureofthesezones,almostallnormalSSSequipment hasrequiredcablesorcomponents inthearea.Second,FireZones6N,6S,43,44N,and44SaretheAuxiliary Buildingzonesthatdirectlyinterface withthecablevault.and ControlRoomzones.Becauseoftheirphysicalproximity totheseareas,manySSScircuitsandcablestypically exittheControlRoomandcablevaultareasviathesefivefirezonestotheremaining plantareas.ThethirdgroupcontainsFireZones40A,40B,41,42A,42B,42Cand42DforUnit1,and47A,47B,45,46A,46B,46Cand46DforUnit2.Thesezones,whichhousethemajorityoftheon-siteemergency powersystemequipment andshareacommongaseoussuppression systemperunit,havebeengroupedtogetherforthepurposeofthisanalysis.

The-final groupcontainsFireZones14and20,whicharetheUnit1andUnit2Transformer Rooms.Theseroomscontaincablesthatcanaffectoperability oftherespective unit'sredundant dieselgenerators.

Theseroomsalsocontainthepressurizer backupheatertransformers alongwithassociated PageS-l5 primaryandsecondary cabling.Firesinoneoftheseroomsmaycausethelossofallon-siteacpowerfortheassociated unit.Table5-2liststhenormalshutdownequipment thatmustbereestablished forallfirezonesutilizing completealternative shutdown.

Thetablewasdeveloped byassumingthatallnormalshutdownequipment hasbeenrenderedunavailable duetohypothesized fire.,Thislimitingcondition, whichisconservative, yieldsasubsetofnormalSSSequipment thatmustbeoperatedtoachievealternative shutdownviaMethodAS1.Thatlistofequipment bysystemandthemethodofoperation assumedpost-fire aredepictedinTable5-2.Withtheexception ofMethodAS3,theremaining alternative

.shutdown methodstabulated inTable5-1aresubsetsofthiscompletealternative shutdownmethod.Assuch,theyuseonlyportionsofthesystemsandequipment requiredforthecompletealternative shutdownmethod.5.3.2MethodAS2MethodAS2,the"Charging Cross-tie andSupporting SystemsOnly"alternative shutdownmethod,isrequiredinFireZones62A,62Band62CinUnit1and63A,63Band63CinUnit2only.TheseareasaretheUnit1andUnit2chargingpumpareas,respectively.

Shouldafireoccurintheseareas,onlytheabilitytoprovidenormalchargingsystemmakeupwillbeaffected.

AllothernormalSSSareoutsideofthearea.Thisalternative shutdownmethodaddresses lossofnormalchargingflowbyproviding CVCSmakeupviatheproposedCVCScross-tie.

Page5-16 Table5-3identifies bysystemthenormalSSSequipment thatislostduetofiresinthesezonesandthatmustbeavailable tosupporttheCVCScross-tie method.NotethatnonormalSSSequipment thatisrequiredtosupportMethodAS2isunavailable duetofiresintheseareas.5.3.3MethodAS3MethodAS3,the"Essential ServiceWaterCross-tie andSupportOnly"method,isalsoonlyrequiredinFireZones29(A,B,E) and29(C,D,F).

ThesearetheUnit1andUnit2ESWpumpareas,respectively.

Thisshutdownmethodisnecessary toaddressthepotential lossofbothoftheaffectedunits'SWpumps,discharge valvesorstrainers forfiresinthesezones.1PThemethodprovidesforrestoration ofESWflowinthefire-affectedunitvianormallyopenmotorized headercross-tie valves(WM0-705, WMO-706,WMO-707andWMO-708)thatexistoutsideofthesefirezonesandarefreeoffiredamage.Table5-4identifies bysystemthenormalSSSequipment thatislostduetofiresinthesezonesandthatmustbeavailable tosupportthisalternative shutdownmethod.NotethatnoSSSequipment thatisrequiredtosupportMethodAS3isunavailable duetoafireinthesezones.5.3.4MethodAS4MethodAS4,.the"LocalPORVControlOnly"method,isrequiredforthoseareaswherelossofnecessary PORVcontroloccursduetolossofsupporting EPSorlossofPORVcontrolPage5-17 circuitcables.ThismethodisrequiredinFireZones15,33,38and52forUnit1and18,34,39and52forUnit2.InFireZones15arid18,thelossoftheEPSsupplytothePORVsrequireslocalcontrol.Intheremaining zones,lossofPORVcontrolcircuitcablesrequireslocalcontrol.Localmanualoperation oftwoofthefourPORVsattheirrespective localcontrolstationsneartheLSI-1andLSI-2panelsprovidesthenecessary alternative shutdowncapability.

Table5-5identifies bysystemthenormalSSSequipment that1hislostandthatmustbeavailable tosupportMethodAS4duetofiresinZones33,34and52.Asimilartabulation forFireZones15,18,38and39isprovidedasTable5-7.SincethesezonesalsorequireMethodAS5,"ThandTcMonitoring,"

thetablereflectsthenormalequipment thatislostandmustbeavailable forbothmethods.5.3.5MethodAS5MethodAS5,the"ThandTcMonitoring Only"method,isrequiredonlyforthosezoneswherelossofsupporting EPSorassociated instrumentation loopcablesoccurs.ThismethodisrequiredinFireZones15and38forUnit1,and18and39forUnit2.Table5-6identifies bysystemthenormalSSSequipment thatislostduetofiresinZones15,18,38and39andthatmustbeavailable tosupportthisalternative shutdownmethod.Page5-18 Table5-7identifies bysystemthe'ormal SSSequipment thatislostduetofiresinZones15,18,38and39andthatmustbeavailable tosupportbothMethodAS4andAS5inthesezones.5.4DetailedResonsetotheNRCClarifications ofGenericLetter81-12Thefollowing information isprovidedasadetailedresponsetoEnclosure 1ofNRCMemorandum ofMarch22,1982,forthefirezonesatD.C.CookUnit1andUnit2thatrequirealternative shutdown.

AsstatedinEnclosure 1,theinformation requestisgmerelyarewording oftheSection8information requestcontained inGenericLetter81-12.Theinformation requestcontained Section8,particularly paragraphs (b),inGenericLetter81-12(c),(d),(e),(g),(i)and(j),andClarification LetterEnclosure 1,Paragraphs 1(a)throughl(j),isprincipally focusedonalternative shutdowndesignsthatutilizeisolation/transfer andcontrolswitchestobypassdamagedpowerorcontrolcircuitcablingandequipment.

Thisbypassing ofdamagedelementsbythealternative shutdownsystempermitsrestoration ofotherelementsofthesafeshutdownsystemscircuitsunaffected bythehypothesized fire.Inaddition, newcircuitsandcablingaretypically addedtoreestablish operation andcontrolofnecessary normalsafeshutdownequipment.

Page5-19 Aspreviously discussed, theprincipal alternative shutdownapproachutilizedbyIndianaandMichigan, withexception oftherepowering ofcertaininstrumentation andisolation ofESWandCCWpumpcontrolcables,doesnotattempttorestoredamagedequipment orcircuits, butinsteadprovidesfortheuseoftheindependent safeshutdownsystemsoftheunaffected unittoachievealternative safeshutdownsystemfunctions.

Toalargedegreetheuseoftheunaffected unit'ssafeshutdownsystemstoprovidesafeshutdowninthefire-affected unitcouldbeviewedasdedicated ratherthanalternative shutdown.

Becausethisapproachisinfact,amixtureofalternative anddedicated

shutdown, muchoftheinformation requested bytheNRCisrelated-tonormalcircuitsandequipment inthefireareathatwillbeseveredorbypasseddoesnotapply.Theresponses providedbelowhavebeentailoredtotheuniquecharacteristics oftheD.C.Cookalternative shutdownapproach.

Identifythoseareasoftheplantthatwillnotmeettherequirements ofSectionIII.G.2ofAppendixRand,'thusalternative shutdownwillbeprovidedoranexemption fromtherequirements ofSectionIII.G.2ofAppendixRwillbeprovided.

Additionally provideastatement thatallotherareasoftheplantareorwillbeincompliance withSectionIII.G.2ofAppendixR.Tablel-lprovidesaconciseoverviewofthestatusofcompliance withSectionIII.GofAppendixRforallfirezonesatPage5-20 theD.C.CookNuclearPlantUnits1and2.Thetableclearlyidentifies whichzonesareorwillbeincompliance withIII.G.2,whichzonesrequirealternative shutdown,'nd whichzonesrequiresomeformofexemption fromcertainprovisions ofSectionIII.G.Listthesystem(s) orportionsthereofusedtoprovidetheshutdowncapability withthelossofoff-sitepower.Resonsel.aRefertoSections4.1through4.4,whichdescribethenormalshutdownsystemsusedbythisanalysistoachievesafeshutdownforallfirezones..Asdiscussed inthesesections, thesystemsandequipment selectedforthepurposeofthisanalysisareaminimumsetofplantsystemsthatcanbeusedtoachievesafeshutdown.

Shouldalossofoff-sitepoweroccurwithoutanassumedplantfire,thesesystemsandotherswillbeavailable toachievesafeshutdown.

.bForthosesystemsidentified in"la"forwhichalternative ordedicated shutdowncapability mustbeprovided, listtheequipment andcomponents ofthenormalshutdownsysteminthefireareaandidentifythefunctions ofthecircuitsofthenormalshutdownsysteminthefirearea(powertowhatequipment, controlofwhatcomponents andinstrumentation).

Describethesystem(s) orportionsthereofusedtoprovidethealternative shutdowncapability forthefireareaandprovideatablethatliststheequipment andcomponents ofthealternative shutdownsystemforthefirearea.Page5-21 Foreachalternative systemidentifythefunctionofthenewcircuitsbeingprovided.

Identifythelocation(firezone)ofthealternative shutdownequipment and/orcircuitsthatbypassthefireareaandverifythatthealternative shutdownequipment and/orcircuitsareseparated fromthefireareainaccordance withSectionIII.G.2.Resonsel.bSections5.2,5.3andassociated Tables5-1through5-7provideadetailedresponsetotheinformation requiredbythefirstparagraph oftherequest.Forthosecircuitsrequiring bypassandisolation, Figures5.14.1through5.18identifythecablesrequiring isolation andthefirezonelocations ofthealternative shutdowncablesthatbypassthefirezoneofconcern.Aspreviously discussed, onlythealternative shutdownESWpumpcontrolcircuitsandcertainLSIpanelinstruments containcablingthatwouldnotbefreeoffiredamageforcertainareasrequiring alternativ'e shutdown.

Section5.5providesdetailedinformation onthemodifications proposedtoensurethatthesealternative shutdowncircuitsareisolatedfromthecircuitcablesthatarelocatedinzonesrequiring alternative shutdown.

Thissectionandreferenced figuresalsocontaininformation onallthenewcircuitstobeprovidedtoachievealternative shutdown.

Withthe-exception ofFireZone44S,allalternative shutdownequipment andcircuitsareseparated fromthefirezonesinaccordance withSectionIII.G.2.Page5-22 FireZone44Shasbeenidentified asrequiring alternative shutdownfor.Unit2.Thefirezonecontainsallcomponent coolingwaterpumpsforbothunitsandtherefore doesnotcomplywiththeprovisions ofSectionIII.G.2.Section7.10providesadetaileddiscussion ofthetechnical basisforrequesting anexemption fromtheprovisions ofSectionIII.G.2forthesepumps.Providedrawingsofthealternative shutdownsystem(s) whichhighlight anyconnections tothenormalshutdownsystems(PEIDsforpipingandcomponents, elementary wiringdiagramsofelectrical cabling).

Showtheelectrical locationofallbreakersforpowercables,andisolation devices,forcontrolandinstrumentation circuitsforthealternative shutdownsystemsforthatfirearea.Figures5.6through5.9andFigure5.11depictthepipingandcomponent connections betweenthenormalshutdownandalternative shutdownsystems.Figures5.10.1through5.10.5identifythelocationofexistingandproposedLSIpanels.Figures5.12.1and5.12.2arethepowersupplyone-linediagramsfortheLSIpanels.Figure5.13isatypicalschematic showingthepowerswitching arrangement attheLSIpanels.Figure5.19.1through5.19.3andFigure5.20depictinblockdiagramformtheexistingand,proposedlocalshutdowninstrumentation.

Figures5.14.1through5.18depicttheisolation relaysandcontrolcircuitandcablingmodifications thatensuretheCCWandPage5-23 ESWpumps,ESWstrainers andvarioussystemvalvesarefreeoffiredamageandavailable tosupportalternative

shutdown, asrequired.

Reuestl.dVerifythatchangestosafetysystemswillnotdegradesafetysystems:(e.g.,newisolation switchesandcontrolswitchesshouldmeetdesigncriteriaandstandards intheFSARforelectrical equipment inthesystemthattheswitchistobeinstalled; cabinetsthattheswitchesaretobemountedinshouldalsomeetthesamecriteria(FSAR)asothersafety-relatedcabinetsandpanels;toavoidinadvertent isolation fromtheControlRoom,theisolation switchesshouldbekeylocked oralarmedintheControlRoomifinthe"local"or"isolated" position; periodicchecksshouldbemadetoverifythattheswitchisintheproperpositionfornormaloperation; andasingletransferswitchorothernewdeviceshouldnotbeasourceofafailurewhichcauseslossorredundant safetysystems).

Resonsel.dTheonlymodifications thatwillinvolvesafety-related equipment are:(1)Rerouting ofESWpump,discharge valveandstrainercables;(2)Installation oftheCVCSpipingcross-tie; and(3)Rerouting RCSwiderangetemperature instrumentation cables.10CFR50.59reviewswillbeperformed fortheseandallotherproposedmodifications.

Basedonpreliminary reviews,no'hangestothesafetysystemswilldegradetheirperformance forthespectrumofdesignbasiseventsforwhichtheyarerequired.

Page5-24 Reuestl.eVerifythatlicenseeprocedures havebeenorwillbedeveloped whichdescribethetaskstobeperformed toeffect'theshutdownmethod.Provideasummaryoftheseprocedures-outlining operatoractions.Resonsel.ePlantprocedures willbedeveloped thatwilldescribethepost-fire operations tobeperformed.

Abriefsummaryoftheseprocedures isprovidedinSection5.6forareasrequiring completealternative shutdown.

Althoughtheprocedures onlyutilizetheminimumsetofequipment identified inthisanalysis, equipment notinvolvedinthefirewillbeutilizedtotheextentpossibletoprovidemaximumoperational fl"xibility.

Verifythatthemanpowerrequiredtoperformtheshutdownfunctions usingtheprocedures ofe.aswellastoprovidefirebrigadememberstofightthefireisavailable asrequiredbythefirebrigadetechnical specifications.

Resonsel.fForthespectrumofoperations requiredfortheinitialhotstandbyperiodpost-fire (approximately twohours),threeoperations personnel aresufficient toachieveandmaintainsafeshutdowninadditiontothefirebrigademembersandthealternate unit'sControlRoomoperators.

Provideacommitment toperformadequateacceptance testsofthealternative shutdowncapability.

Thesetestsshouldverifythat:Page5-25 equipment operatesfromthelocalcontrolstationwhenthetransferorisolation switchisplacedinthe"local"positionandthattheequipment cannotbeoperatedfromtheControlRoom;andthatequipment operatesfromtheControlRoombutcannotbeoperatedatthelocalcontrolstationwhenthetransferisolation switchisinthe."remote" position.

Resonsel.Acceptance testsofallmodifications willbeperformed toensurealternative shutdownsystemperformance requirements.

ProvideTechnical Specifications ofthesurveillance requirements andlimitingconditions foroperation forthatequipment notalreadycoveredbyexistingTechnical Specifications.

Forexample,ifnewisolation andcontrolswitchesareaddedtoashutdownsystem,theexistingTechnical Specification surveillance requirements shouldbesupplemented toverifysystem/equipment functions fromthealternate shutdownstationattestingintervals consistent withtheguidelines Regulatory Guide1.22andIEEE338.Creditsmaybetakenforotherexistingtestsusinggroupoverlaptestconcepts.

Resonsel.hNomodifications totheD.C.CookTechnical Specifications areanticipated, butifanyarerequired, thesewillbemadefollowing NRCacceptance ofthealternative shutdownsystemsprovidedinthissection.Fornewequipment comprising thealternative shutdowncapability, verifythatthesystemsavailable areadequatetoperformthenecessary shutdownfunction.

Thefunctions requiredshouldbebasedonpreviousanalyses, Page5-26 ifpossible(e.g.,intheFSAR),suchasalossofnormalacpowerorshutdownonGroup1isolation (BWR).Theequipment requiredforthealternative capability shouldbethesameorequivalent tothatreliedonintheaboveanalysis.

Resonsel.iThesystemsandequipment thatcomprisethealternative shutdownmethodaspreviously described areidentical inperformance capability tothenormalshutdownsystems.Verifythatrepairprocedures forcoldshutdownsystemsaredeveloped andmaterialforrepairsismaintained onsite.Provideasummaryoftheseprocedures andalistofthematerialneededforrepairs.Resonsel.Aspreviously

outlined, themodification/repairs requiredtoachievelong-term coldshutdownare:(1)Repowering ofpressurizer heaters(optional

-notrequiredforsafeshutdown);

and(2)Repowering ofoneRHRpump.Section6containsadiscussion oftherepairsandliststhematerialneededtoimplement therepairs.5.5Alternative ShutdownModifications Thefollowing isacompilation oftheproposedequipment andsystemmodifications requiredtoachieveoperability ofthealternative shutdownsystem.Page5-27 5.5.1CVCSCross-tie Installation ofapermanent CVCScross-tie:

Thefour-inch cross-tie withdoubleisolation isdepictedontheattachedPAID,Figure5.5.Thelinevillbeinstalled inaccordance withtheinstallation criteriaoftheCVCSsystem.Physicalroutingofthecross-tie, aspresently

proposed, isoutlinedinFigure5.11.5.5.2Alternate PowertoLSIPanelsRepowering oftheLSIpanelsfromtheunaffected unit'semergency powersources:Figures5.12.1and5.12.2depictinone-linediagramformtheproposedpoversupplymodifications totheLSIpanels.Figure5.13istheassociated electrical schematic.

Alltheinstrumentation locatedonthepanelsisnonsafety-related.

Thepowersupplycablesarealsodesignated asnonsafety-related, althoughtheyarepoweredfromeitherunit'son-sitepoversources.Theroutingoftheunaffected unit'spowercablingtotheLSIpanelswillcomplywiththeseparation requirements ofSectionIII.G.2forthosefirezonesforwhichthepowercablingisrequiredforalternative shutdovn.

5.5.3ESWPumCircuitModifications Isolation andrerouting ofvariouscontrolcablesfortheESWpumps:Isolation relayswillbeaddedtothecircuitsthatstarttheESWpumpsfromthedischarge headerpressureswitchesasveilasfromtheoppositeunit'ssafetyinjection (SI)signal.Page5-28 hTheserelayswillbeaddedatthe4kVswitchgear forallfourESWpumps.Therelayswillensurethatelectrical open,shortandgroundfaultsinthefirezoneswillnotpreventproperoperation oftheESWpumpsintheunaffected unit.Table5-8identifies thecablesthatwillbeisolated'ndtheirfirezonerouting.Theredundant ESWpumpbreakercontrolsandtheirassociated cables,whichpresently existforthesepumpsinthealternate unit'sControlRoom,willberelocated totheirownunit'shotshutdownpanel.Inaddition, thesecondESWpump'sbreakercontrolcircuitry andassociated cablesinthealternate unit'shotshutdownpanel'ill beremoved.Thepurposeofthismodification istoeliminate thepotential forelectrical open,shortandgroundfaultsinthefire-affected unitaffecting theESWpumpcontrolsoftheunaffected unit.Therelocated controlsonthehotshutdownpanelarenotrequiredforAppendixRsafeshutdown.

Typicalcircuitry modifications toensureisolation of/fieldcablingareshownasFigure5.14.Thecablesthatwillbeeliminated aretabulated inTable5-9andarealsoshownonFigure5.15.5.5.4ESWStrainerandValveCircuitModifications Modifications, similartothosedescribed fortheESWpumpin5.5.3above,willbeimplemented fortheESWpumpdischarge valves,strainers andheadercross-tie valves.Thecablesthatwillbeeliminated aretabulated inTable5-9andarealsoshownonFigures5.16,5.17and5.18.Page5-29 5.5.5CCWPumCircuitModifications Isolation ofCCWpumppressureswitchandassociated cablingwillbeaccomplished withisolation relayssimilartothemethodproposedfortheESWpumppressureswitches.

Table5-8identifies thecablestobeisolated.

5.5.6NewThandTcforLSIPanelsToensurethathotlegtemperature (Th)andcoldlegtemperature (Tc)information isavailable tomonitorsafeshutdownatpanelsLSI-4,LSI-5andLSI-6,newsafety-related instrument circuitswillbererouted.

NewcablingwillberoutedfromtheRTDsviacontainment penetrations tothelocalpanels.ThandTcforRCSloopsland4willbeavailable atLSI-5.ThandTcforRCSloops2and3willbeavailable atLSI-6.Allfourcoolantloops'handTcwillbemadeavailable attheLSI-4panel.Thecableroutingwillbedesignedtoensurethatsufficient separation andprotection existforallareasrequiring alternative shutdownindication ofThandTc.Aswithotherinstrumentation locatedontheLSIpanels,thesetemperature loopscanbepoweredfromeitherunit'sEPS.5.5.7NewSGPressureforLSIPanelsToensurethatsteamgenerator pressureinformation isavailable tomonitorsafeshutdown, pressuretransmitters willbeinstalled forsteamgenerators 1,4and2,3atpanelsLSI-5andLSI-6,respectively.

Thesignalswillalsoberetransmitted toLSI-4toprovidecentralized information.

Page'-30 5.5.8NewSRMforLSIPanelsToensurethatsourcerangeneutronmonitoring information isavailable tosupportalternative

shutdown, anewSRMchannelwillbeinstalled.

Thechannel'willutilizeanexistingspareex-coremonitorwellandwillprovideindication atlocalpanelLSI-4.RoutingofallcablingrequiredwillnotviolateSectionIII.G.2criteriaforthezonesrequiring alternative shutdown.

Figure5.20isasketchoftheproposedSRMchannel.5.5.9.NewCentralized ControlPanels-LSI-4Inordertoprovideacentralized controlandcommunication pointforallactionoutsidetheControlRoom,allrequiredsafesh.;itdown instrumentation thatpresently existsorisproposedonpanelsLSI-1,LS$-2,LSI-5andLSI-6willberetransmitted topanelLSI-4,whichisadjacenttoLSI-3.Allinstrumentation requiredforlocalshutdownindication willbeavailable atpanelsLSI-3andLSI-4.Localindication forRCSpressure, pressurizer level,chargingandletdownflowarepresently locatedonLSI-3.Localindication forRCShotandcoldlegtemperatures, steamgenerator

pressure, steamgenerator levelandsourcerangemonitoring willbeaddedonLSI-4.Inaddition, bothLSIpanelswillhavethecapability ofbeingpoweredfromtheunaffected unit'sEPS.Figures5.21.1,5.21.2and5.21.3conceptually showpanelsLSI-l,LSI-2,LSI-3and'LSI-4.Page5-31 5.5.10Permanent CableforPressurizer BackuHeaterReowerinToensurethattimelyrepairscanbeperformed toreenergize onebackupgroupofpressurizer heaters,a480VMCCwillbe.permanently installed inthefire-affected unitforthisrepairactivity.

ThisMCCwillbepowered-froma480Vswitchgear circuitbreakerlocatedintheunaffected unit.(RefertoFigure5.22forUnitlone-linerepresentation.)

Permanent powercableswithprefabricated terminations willbestoredattheMCC.Duringafire,thesecableswillberoutedfromtheMCCtotheelectrical penetrations forrepowering ofthreebanksofpressurizer heatersinabackupheatergroup.Furtherdiscussion oftherepairactivities isprovidedinSection6.2.2.5.6SummarofProcedures UsedforAlternative Shutdown5.6.1InitialHotStandbUponoccurrence andnotification of'majorfireinazonerequiring alternate

shutdown, theControlRoomoperatorwillinitiatereactorandturbinegenerator tripsandactuation ofMSIVisolation.

Uponlossofmajorshutdownsystemcontrols, transferofcontrolawayfromtheControlRoomtolocalshutdownoperation centersmayoccurwiththeoperators takingthefollowing immediate actions:(1)Theunaffected unit'sControlRoomoperators arenotifiedofthemajorfireandinitiatemeasurestoutilizecross-tied alternative systemstoachievesafeshutdowninthefire-affected unit.(2)Asnecessary tominimizeinventory lossandpreventinadvertent operation, isolation ofvariousletdownPage5-32 (3)(4)pathsfromtheRCSisachievedbytrippingselective controlpowerbreakers.

Thesepathsincludeletdown,excessletdown,headandpressurizer vents,RCPsealletdown,andpressurizer PORVs.Anoperatorisdispatched tothrottleopentheUnit1-Unit2CVCSmanualcross-tie valvesandRCSmake-upisimmediately achievedeitherviatheRCPsealwater'njection linesorviatheBIT(optional path).Thesameoperatortransfers variousSSSinstrumentation atlocalpanelLSI-3toprovidelocalreadoutofallSSSinstrumentation.

(5)(6)Asecondoperatorisdispatched toopenoneorbothoftheexistingUnit1/Unit2motor-driven auxiliary feedwater pumpmanualunitcross-tie valves(FW-129).

Thesecondandathirdoperatorverifymainsteamisolation andoperation ofthesteamgenerator safetyvalves.(7)Thesameoperators manuallyalignthefire-affected unit'ssteamgenerator inletvalves(FM0-212, FM0-242,and/orFM0-222,FMO-232)andestablish localmanualcontrolofthevalves.(8)(9)(1O)(11)Operators twoandthreetransfersteamgenerator instrumentation atlocalpanelsLSI-1andLSI-2.eTheunaffected unit'sControlRoomoperators closetheunaffected unit'ssteamgenerator inletvalves(FM0-212, FMO-242and/orFM0-222,FMO-232)andstarttheappropriate unaffected unit'smotor-driven auxiliary feedwater pumpfromtheControlRoom.StablecontroloftheRCSmake-upsystemisachievedbymonitoring LSI-3panelinstrumentation andthrottling theCVCScross-tie valves.Stablecontrolofsteamgenerators inventory andRCSheatremovalisachievedbymonitoring LSI-1andLSI-5and/orLSI-2andLSI-6panelsinstrumentation andmanualcontroloftheappropriate steamgenerator inletvalvesandPORVs.(12)TheabovefourLSIstationsLSI-3andLSI-4(locatedindications.

arecoordinated byusingnexttoeachother)Page5-33 Theseactions,whichshouldeasilybeaccomplished withinarelatively short(30-minute) timeframe,aresufficient toachieveandcontrolbothprimaryandsecondary make-upandheatremoval.Therefore, safehotstandbyconditions

{theunit'ubcritical andattemperature andpressure) willbeachieved.

5.6.2Lon-TermHotStandbShouldtheextentoffiredamagebesuchthatimmediate reoccupancy oftheControlRoomandreestablishment of-onetrainofthefire-affected unit'ssafeshutdownsystemsareno'tfeasible, long-term hotstandbyconditions canbemaintained bycontinued useofthealternative shutdownsystempreviously discussed.

Theborationtoxenon-free conditions canbeachievedbyinjection viatheCVCScross-tie fromtheunaffected unit'sRWST.Otheralternative meansofborationincludeuseoftheBITpathorinjection fromtheboricacidsystemifavailable.

Shrinkage oftheRCSwillprovidesufficient volumereduction toaccommodate themakeupduringthisperiod.Cooldownwillbeprovidedbycontinued operation ofauxiliary feedwater andmanualoperation ofthesteamgenerator PORVs.Atapproximately fivetosixhourspost-fire, ifpressurizer backupheatershavebeenlost,ambientheatlossesfromthepressurizer maycauseadecreaseinsubcooling margin.Thismarginwillbemaintained byinitiating RCScooldownorPage5-341 alternatively byrepowering threebanksofpressurizer heatersinabackupheatergroupfromtheunaffected unit.Othermanualsystemandvalvealignments mayoccurtoprovideadditional operational flexibility andtoprepareforinitiation ofRHRoperation (hotshutdown).

5.6.3HotShutdownInordertoachievehotshutdown, therepairprocedure forrepowering oneRHRpumpfromtheunaffected unitwillbeimplemented.

Inaddition, manualrealignment oftheunaffected unit'sCCWandESWsystemswillbeperformed toprovidecoolingwatertotheassociated RHRheatexchanger.

Otherminormanualvalvealignments intheRHRsystemwillalsobiperformed.

TheSIaccumulators willbeisolated.

TheRHRinletvalveswillbemanuallyopenedandtheRHRsystemwillbestarted.5.6.4ColdShutdownColdshutdownisachievedbycontinued operation oftheRHRsystemandtheotherrequiredsupporting systemsthatwerepreviously inoperation duringhotshutdown.

5.6.5Alternative ShutdowhSstemTechnical Secifications IndianaandMichiganElectricCompanyhasconducted areviewofthetechnical specifications forDonaldC.CookNuclearPowerPlanttodetermine theimpactonthesetechnical specifications oftheproposedAppendixRAlternative ShutdownSystemDesign.Page5-35 BecausetheAlternative ShutdownSystemproposedbyIndianaandMichiganElectricCompanyforD.C.Cookrequirestheuseofvarioussafety-related systemsintheunitunaffected bythefiretoachievesafeshutdown, thisreviewfocusedonallthe,operating modesintheunitunaffected byhypothesized fire.Basedonthisreview,theexistingtechnical specifications foroperating modesl,2and3presently appearadequate.

Thereviewdidindicatethatmodifications tothetechnical

'ispecifications arerequirednoperating modes4,5or6.whentheunaffected unitisinThefollowing information outlinesthegeneralapproachtobetakenbyIndianaandMichiganElectricCompanyinmodifying thetechnical specifications foreachofthealternative shutdownsystemsthatwouldberequiredduringthesemodes.Thisformoftechnical specification modification willbeprovidedforthe'hemicalandVolumeControlSystem,Essential ServiceWaterSystem,Component CoolingWaterSystem,andtheMotor-Driven Auxiliary Feedwater System.LimitinCondition for0erationSufficient systemequipment mustbeavailable topermitthesystemtobeoperableandcapableofsupporting thisunit'soperation intheexist.ing mode(4,5or6)andcapableofproviding alternative shutdowntotheoppositeunitwhilethatunitisinoperating mode1,2or3.Page5-36 ACTION:Withinsufficient systemequipment available tomaintainthisunitinitsexistingoperating modeandsupportsafeshutdownintheoppositeunit,restoresuchminimumcapability within72hoursor:,(l)Establish adailyfireinspection ofthefollowing areasintheoppositeunitrequiring thealternative shutdownsystem;000000000Auxiliary Building-elev.587ftAuxiliary Building-elev.609ftTransformer Room-elev.59lftControlRoomSwitchgear RoomEngineering SafetySystemandMCCRoomEPSEquipment RoomsChargingPumpRoomESWPumpRoom(2)Initially verifybyinspection theOPERABILITY offiredetection, automatic firesuppression andmanualfirefightingequipment forthoseareasrequiring thisalternative shutdownsystem.Ifminimumcapability cannotberestoredwithin30days,submittotheNRCareportoutlining thecauseoftheinoperable equipment, theactionstaken,andtheplansandschedules forrestoring thesystemtooperablestatus.Page5-37

TABLE5-1ALTERNATIVE SHUTDOWNMETHODS/FIRE ZONEMATRIXALTERNATIVE SHUTDOWNMETHODFIREZONESMETHODAS1COMPLETEALTERNATIVE SHUTDOWNMETHODAS2CHARGINGCROSSTIE8SUPPORTING SYSTEMSONLYMETHODAS3ESSENTIAL SERVICEWATERCROSSTIELSUPPORTONLYMETHODAS4LOCALPORVCONTROLONLYMETHODAS5Th$TcMONITORING (LSI-3)ONLY6N6S4344N44S1420535556575458596040A,B4142A,B,C,D47A,B4546A.C,D144145121121'2111122221122NOTESANDLEGEND:1Indicates thealternative shutdo'Wn methodisrequiredinUnit1.2Indicates thealternative shutdownmethodisrequiredinUnit2.1,2Indicates thealternative shutdownmethodisrequiredforbothunits.Page1of2

TABLE5-1(CONT.)ALTERNATIVE SHUTDOWNMETHODS/FIRE ZONEMATRIXALTERNATIVE SHUTDOWNMETHODFIREZONESMETHODAS1COMPLETEALTERNATIVE SHUTDOWNMETHODAS2CHARGINGCROSSTIE8SUPPORTING SYSTEMSONLYMETHODAS3ESSENTIAL SERVICEWATERCROSSTIE8SUPPORTONLYMETHODAS4LOCALPORVCONTROLONLYMETHODASSTh8TcMONITORING (LSI-3)ONLY62A,B,C63A,B,C29A,B,E29C,D,F33,33A,33B36'34,34A,34B3952221,2NOTESANDLEGEND:1Indicates thealternative shutdownmethodisrequiredinUnit1.2Indicates thealternative shutdownmethodisrequiredinUnit2..1,2Indicates thealternative shutdownmethodisrequiredforbothunits.4Page2of2 p'i TABLE5-2NORMALSHUTDOWNEQUIPMENT AFFECTEDBYAFIREWHICHREQUIRESOPERATION POST-FIRE TOSUPPORTMETHODAS1"COMPLETE ALTERNATIVE SHUTDOWN" FIREINFIREZONES14'0'3@54'5'6'7'8t 5960'44'45'N~6SJ43I44Nt44St40Ag40B/41g42Ag42B,42C,42D,47A,47B,45,46A,46B,46C,46DSYSTEMCVCSAFW*MSRCS*EQUIPMENT NoneFMO-212FMO-242FMO-222FMO-232BLI-110BLI-140BLI-120BLI-130MRV-213MRV-243MRV-223,MRV-233NLI-151NPS-122NTR-110NTR-210NTR-120NTR-220NTR-130NTR-230NTR-140NTR-240PRESS.HTR***METHODOFOPERATION Nonormalshutdownequip-mentrequiredManualvalveoperation nearpanelLSI-1Manualvalveoperation nearpanelLSI-2Isolation

&transferofindication topanelLSI-1Isolation

&transferofindication topanelLSI-2Manualvalveoperation nearpanelLSI-1Manualvalveoperation nearpanelLSI-2Isolation

&transferofindication toLSI-3Routingofnewcableswillprovideindication atLSI-4,LSI-5and6**Repowering viarepairfromunaffected unitPage1of2 TABLE5-2(cont.)OSYSTEMCCWEQUIPMENT CMO-410CMO-419CMO-420CMO-429METHODOFOPERATION Verifyalignment of1pairpriortoRHRinitiation ESWWMO-705WMO-708WMO-707WMO-706Verifyalignment of1pairpriortoRHRinitiation WMO-735WMO-737WMO-731WMO-733Verifyalignment of1pairpriortoRHRinitiation (Unit1)EPSWMO-732WMO-734WMO-736WMO-738NonePP-35EPP-35WVerifyalignment of1pairpriortoRHRinitiation (Unit2)Nonormalshutdownequip-mentrequiredRepowering viarepairfromunaffected unit.Inaddition, appropriate manualvalvealignments willbeperformed.

ForZones14and20lossofallacpowerwillnotaffectoperability ofinstrumentation systemsorturbine-driven auxiliary feedwater pumpduetoavailability ofdcpowerforsometimeintervalpost-fire.

    • Notconsidered asnormalshutdownequipment butprovideslocalinformation fromthesameRTDsasnormalinstrument channels.
    • "Therepowering anduseofasinglebackupgroupofpressurizer heatersisoptionalandnotrequiredforsafeshutdown.

Thisrepowering capability isprovidedforoperational flexibility.

Page2of2 TABLE5-3NORMALSHUTDOWNEQUIPMENT AFFECTEDBYAFIREWHICHREQUIRESOPERATION POST-FIRE TOSUPPORTMETHODAS2"CHARGING CROSSTIEANDSUPPORTING SYSTEMONLY"FIREINFIREZONES62{AgBgC)AND63(A~BJC)SYSTEMCVCSAFWMSRCSEQUIPMENT NoneNoneNoneNoneMETHODOFOPERATION Nonormalshutdownequip-mentrequiredNoequipment orcableinthefirezoneUNoequipment orcableinthefirezoneAtleastonepathfreeoffiredamageCCWESWNoneNoneNoequipment orcablethefirezoneNoequipment orcablethefirezonetinin!EPSRHRNoneNoneNoequipment orcableinthefirezoneNoequipment orcableinthefirezonePage1ofl

TABLE5-4NORMALSHUTDOWNEQUIPMENT AFFECTEDBYAFIREWHICHREQUIRESOPERATION POST-FIRE TOSUPPORTMETHODAS3"ESSENTIAL SERVICEWATERCROSSTIEANDSUPPORTONLY"FIREINFIREZONE29(AgB/E)AND29(CPDgF)SYSTEMCVCSEQUIPMENT NoneMETHODOFOPERATION cablein~Noequipment orthefirezoneAFWMSRCSCCWEPSESWRHRNoneNoneNoneNoneNoneNoneNoneNoequipment orthefirezoneNoequipment orthefirezoneNoequipment orthefirezoneNoequipment orthefirezoneNoequipment orthefirezoneNoequipment inzonerequiredNoequipment orthefire'zonecableincableincableincableincableinthefirecableinPage1ofl TABLE5-5NORMALSHUTDOWNEQUIPMENT AFFECTEDBYAFIREWHICHREQUIRESOPERATION POST-FIRE TOSUPPORTMETHODAS4"LOCALPORVCONTROLONLYNFIREINFIREZONES33AND34SYSTEMCVCSAFWMSRCSEQUIPMENT NoneNoneMRV-223MRV-233NoneMETHODOFOPERATION AtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageManualoperation ofSG-2&SG-3PORVnearpanelLSI-2AtleastonepathfreeoffiredamageCCWEPSESWRHRNoneNoneNoneNoneAtleastonefiredamageAtleastonefiredamageAtleastonefiredamageAtleastonefiredamagepathfreeofpathfreeofpathfreeofpathfreeofPage1of2 TABLE5-5(cont.)FIREZONE52SYSTEMCVCSAFWMSRCSCCWEPSESWRHREQUIPMENT NoneNoneMRV-213MRV-243ORMRV-223MRV-233NoneCMO-410CMO-420CMO-419CMO-429NoneNoneNoneMETHODOFOPERATION AtleastonepathfreeoffiredamageAtleastonepathfreeof'iredamageManualoperation ofPORVsnearLSI-1orLSI-2respectively AtleastonepathfreeoffiredamageManualalignment ofeithervalve-hotstandbyManualalignment ofeithervalvepriortoRHRinitiation Bothpathsfreeoffiredamage(manualvalvealignments inothersystemsduetoassumedlossofAM-AandAM-D)Atleastone.pathfreeoffiredamageAtleastonepathfreeoffiredamagePage2of2 0

TABLE5-6INTENTIONALLY DELETED TABLE5-7NORMALSHUTDOWNEQUIPMENT AFFECTEDBYAFIREWHICHREQUIRESOPERATION POST-FIRE TOSUPPORTMETHODAS4"LOCALPORVCONTROLONIY"8AS5"Th6TcMONITORING ONIY"FIREINFIREZONES38AND39SYSTEMCVCSAFWMSEQUIPMENT NoneNoneMRV-223MRV-233~orMRV-213MRV-243METHODOFOPERATION AtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageLocalmanualcontrolofPORVsnearlocalpanelsLSI-1andLSI-2RCSNTR-110*NTR-120NTR-140Routingofnewcablestoprovideremoteindication ofThandforallfourloopsLSI-4,LSI-5,S(LSI-6TcatCCWESWEPSNoneNoneNoneAtleastonepathfreeoffiredamageNoequipment orcablesinthefirezoneAtleastonepathfreeoffiredamageRHRIMO-128**

ManualIMO-128operation of*FireZone38only**FireZone39onlyPage1of2 TABLE5-7(cont)FIREINFIREZONES15AND18SYSTEMCVCSAFWMSEQUIPMENT NoneNoneMRV-213MRV-223MRV-233MRV-243METHODOFOPERATION AtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamage'Localoperation ofsteamgenerator PORVsnearpanelsLSI-1&LSI-2RCSNTR-140NTR-210NTR-240NTR-120NTR-130NTR-220NTR-230Routingofnewcablestoprovideremoteindication atLSI-4,LSI-5,&LSI-6forallfourloopsThandTcCCWESWEPSRHRNoneNoneNoneICM-129ICM-111AtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageManualoperation requiredpriortoRHRinitiation Page2of2 TABLE5-8ESWPUMPSSSCABLESTOBEISOLATEDPUMP1-PP-7E(UNIT1)1-PP-7W(UNIT1)2-PP-7E(UNIT2)2-PP-7W(UNIT2CABLE9248G-18447G-19635R-18447R-19248G-28447G-29635R-28447R-2FIREZONEROUTING54,58,44S,44N,56,55,41,40B112,15,79,41,55,40B54,58,44S,44N,57,56,55,40A112,16,79,55,40A53,57,58,59,60,47B113,,18,46A,60,47B53,57,58,59,60,47A113,19,85,60,46A,45,47ACCWPUMPSSSCABLESTOBEISOLATEDPUMP1-PP-10E(UNIT1)1-PP-10W(UNIT1)2-PP-10E(UNIT2)2-PP-10W(UNIT2)CABLE9425G-18690R-19425G-28690R-2FIREZONEROUTING44S,44N,56,55,40B,4144S,'4N,56,55,42A,40A,4144S,59,60,46A,47B,4544S,59,60,46A,45,47APage1of1 TABLE5-9ESWSYSTEMSSSCABLESTOBEREMOVEDEQUIPMENT ESWSE(UNIT1)ESWSW(UNIT1)WMO-701(UNIT1)WMO-702(UNIT1)WMO-705(UNIT1)WMO-707(UNIT1)1-PP-7E(UNIT1)1-PP-7W(UNIT1)ESWSE(UNIT2)CABLE9654G-19655G-19656G-19654R-"19655R-19656R-19232G-1*8624R-2*9235R-19587G-19658G-19659G-19720G-19428R-19429R-19722R-19654G-29655G-29656G-2FIREZONEROUTING54,58,5754,58,5754,58,5754,58,5754,58,5754,58,5729E,29G,58,5429E,29G,58,5454,57,58,5354,57,58,5354,58,5754,5854,58,57,5354,5854,5854,58,57,5353,57,5853,57,5853,57,58*CablestobewrappedinFireZone29GandremovedfromFireZones54and58(seeFigure5.16).Cable9232G-1hasbeenre-taggedto9867G-l,andcable8624R-2hasbeenre-tagged to.9967R-l.

Page1of2 TABLE5-9(cont.)ESWSYSTEMSSSCABLESTOBEREMOVEDEQUIPMENT ESWSW(UNIT2)WMO-703(UNIT2)WMO-704(UNIT2)WMO-706(UNIT2)WMO-708(UNIT2)2-PP-7E(UNIT2)2-PP-7W(UNIT2)CABLE9654R-29655R-29656R-29987G-2*8996R-l*9235R-29587G-29658G-29659G-29720G-29428R-29429R-29722R-2FIREZONEROUTING53,57,5853,57,5853,57,5829F,29G,57,53,5829F,29G,58,57,5353,57,58,5453,57,58,5453,5753,5753,'7,58,5453,5753,5753,57,58,54I*CablestobewrappedinFireZone29GandremovedfromFrieZones53and57(seeFigure5.l6).,Cable9987G-2hasbeenre-taggedto8644G-2,andcable8996R-lhasbeenre-tagged to8979R-2.Page2of2 STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONS OFOFF.-SITE POWERREACTORPRO-TECTION'AND CONTROLRODREACTORTRIPINSERTION SWITCHGEAR INITIALREACTIVITY CONTROLRWST*CENTRIFUGAL CHARGINGPUMPS'1OF2)*RWSTNTRIFUGCHAPUOF2)BORATEDWATERSOURCEfunctionnotfree~offiredamagePUMPINGCAPACITYRCPUMPSEALORBIT~INJECTION INJECTION PATH~TE:THEBITINJECTION PATHISOPTIONALANDNOTREQUIREDFQRSAFESHUTDOWN.

SOURCE**RANGEMONITORING INSTRUMENTATION'ONG-TERMREACTIVITY CONTROLNOTE:*Indfcstes systemsoroqWpmontfromthounituneffoctod hythoNro.ls*Equlpmont repowersd fromunsNocled unit's~msrponcypowersystem.ALTERNATIVE SHUTDOWNRCSREACTIVITY CONTROLFIGURE6.'t SAFESHUTDOWNFUNCTIONS STATIONFIREPLUSLOSSOFOFF-SITEPOWER'WST"CENTRIFUGAL CHARGINGPUMPS(1OF2)*RSWTCRIFUCHARPS(12)WATERSOURCEEFunctionnotfreeoffiredamagePUMPINGCAPACITYRCPUMPSEALORBITINJECTION INJECTION PATHNOTE:THEBITINJECTIONPATHISOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.

CONTROLRCSLEAKAGERCSINVENTORY LOSSCONTROLPRESSURIZER**

LEVELMONITORING INSTRUMENTATION REACTORCOOLANTMAKEUPCONTROLALTERNATIVE SHUTDOWNRCSMAKEUPCONTROLFIGURE5.2NOTKt"Indicates systemsoroqulpmsnt fromthounitunattoctod bythofire.~'Equlpmont ropowerod

'romunattested unlye'tomorttency powersystem.

STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONS OFOFF.SITEPOWERPRESSURIZER SAFETYVALVESOVERPRESSURE PROTECTION HI.LOPRESSUREINTERFACE ISOLATION DEPRESSURIZATION PROTECTION AUXILIARY SPRAYLINEISOLATION PRESSURIZER HEATERSSUBCOOLING MARGINCONTROLNOTE:THEPRESSURIZER HEATERSAREOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.

RCSPRESSUREMONITORING INSTRUMENTATION RCSTrrMONITORING INITIALRCSPRESSURECONTROLRHRSAFETYVALVESOVERPRESSURE PROTECTION LONG-TERMPRESSURECONTROLALTERNATIVE SHUTDOWNRCSPRESSURECONTROLFIGURE5.3frOTKt~Indicates systemsorequipment fromthounitunaffected bytheffre.~'t!qulpmont ropoworod fromunaffected unit'o~morponcypowersystem.

SAFESHUTDONNFUNCTIONS

.STATIONFIREPLUSLOSSOFOFF-SITEPOWERSTEAMGENERATORS (2OF4)HEATTRANSFERPATHSTEAMGENERATOR SAFETYVALVEANDPORVHEATRELEASEPATHRCSTHANDTc'ONITORING NATURALCIRCULATION STEAMGENERATOR PRESSUREANDLEVELMONITORING STEAMGENERATOR INSTRUMENTATION CONDENSATE

  • STORAGETANKWITHESSENTIAL SERVICEWATERBACKUPCONDENSATE STORAGETANKWITHESSENTIAL SERVICEWATERBACKUPSECONDARY WATERSOURCEffOTE:ALTERNATIVE SHUTDOWNREACTORHEATREMOVALFIGURE5.4~Indlcstes systemsoroqulpmont fromthounitunsfloctod bythoflm."Equtpmont ropowored fromunaffected unit'~mergencypowersystem.

0SAFESHUTDOWNFUNCTIONS FunctionnotfreeoffiredamageAUXILIARY

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NOTE;VARIOUSCABLESSHOWNAREINNON-SSSCIRCUITS i-9gozaply~.CiuhrI-$200'PI"92009Tr1Z-90ooICABLEANDSWITCHESTOBEREMOVEDPANESW(UNgr+I)PA@4ESW(u~Iri)i/IUP~zsw'uuvr>i)

Jpfes'u74-i'qeEsw.(ifHifiI-$4CO54pV//0%Q0IDQIVII-V+%AlibiIoxO'QCOC7QO4WOO707/-$$colNOTE:VARIOUSCABLESSHOWNAREINNON-SSSCIRCUITSESWCROSS-TIE VALVE(TYPICAL)

FIGURE5.18 SIIICLEELEMENTATDaITTP,)NTA'110TERIOTLEO)(UnitI)411AINSIDECONTAINMENT OUTSIDECotlTAltIMINT NTA110TEgOLDLEG)(Unit2)4118INSOECOIITAIIIMENT OUTSIDECotITAIIIMEttT POWERSOURCEPOWEASOURCELSI.5XNTR'IIOB))TRLSI.5TOCONTROLAOOMZLooPIII/I)INTRIIOAPOWERSOURCEPOWERSOURCELSI.5XX1108NTRgtLSI5XXIIIIILSI5XXNTR21+LSI-SXLSISXLSI.SXLSI-5XXLSI.SXXIIITOCONTAOLLooPILy4)TEMP.IIIOICATORTEMP,INDICATOR POWERSOURCETEMP,Itrt>>CATPRTEMP.INDICATOR tOWERSOURCELSI4LSI.5LSISXLSI4LSI5LSI-SXXPROPOSEDTHANDTcLOCALINSTRUMENTATION (LOOP1SHOWN-LOOPS2,3AND4SIMILAR)LT501BLI~I'10INSIDECONTAINMENT'l)TSIOE CONTAIIIMEtlT IAEMOTEILOCALBLI110LSI.)LSI~I41141XBLI110LSI~IIIIIIIIf.XTENSIONOFINOICATON ToLSI4PROPOSEDToCONTAOLROOMANONSPIPANELltlOICATlotlPOWERSUPPLY~LSI~IeuI'IOLSI4EXISTINGWIDE-RANGE STEAM'ENERATOR LEVELLOCALINSTRUMENTATION (LOOP1SHOWN-LOOPS2,3AND4SIMILAR)FIGURE6.19.1LSIINSTRUMFNTATION LOOPI213POWERSUPPLYLQ.4MPI213LSI.5213Ldl4PROPOSEDSTEAMGENERATOR PRESSURELOCALINSTRUMENTATION.

(LOOP1SHOWN-LOOPS2,3,AND4SIMILAR)EXISTINGPRESSURIZER LEVELLOCALINSTRUMENTATION LT%1.141442IOUTQOECONTAINMENT I43143XHLIHLI141LSH31411ITOCOHTROLROOMIHOCATNN'141FIGURE5.19.2LSIINSTRUMENTATION PT405NPS~122INSIDECONTAINMENT OUTSIOECONTAINMENT REMOTEILOCAL Q431NPS12243K,NPS122LSI.3IIPOWERSUPPLYLQ.3TOCONTROLROOMRECORDERPR403ANOOTHERINTERLOCKS LQ3EXISTINGREACTORCOOLANTWIDERANGEPRESSURELOCALINSTRUMENTATION FIGURE5.19.3LSIINSTRUMENTATION 80CjNOTES:X~SPAREWflLPPOWERRANGESIEXISTINGSOURCE/WTERMEDIATE RANGESi-PROPOSE0SOVRCflWTERMEDIATE RANGECORE88BYMANUFACTURER J.BOXNOTE:THISFIGUREISSHOWNFORUNIT1.UNIT2ISSIMILARWSIDEOUTSIDECONTAWMENTCONTAWMENT CONTROLROOMUNIT2UNIT1POWERANDSIGNALCABLESCRIDIIIUNIT2POWERREMOTEAMPLIFIfRANDISOLATORISOLATEDREMOTESIGNALPROCESSWQ DISPLAYCASWFTSIGNALCABLESCONTROLROOMPROCESSOR ISOlATEDSIGNALCABLEISOLATEDSIGNALSJTOLOCALCABWETLSI.iISOLATfDSIGNAL~TOCONTROLROOMDISPLAYCONTROLROOMUNIT1CRIDIIIUNIT1POWERPROPOSEDUNIT1SRMINSTRUMENTATION FIGURE5.20

QFl-QOO0/I.3ot8/ZI-/5/I+NP5/22IiIICHARGIAfGPLOWLErDOW4fPRESSURIZER FLOWLEYE<p..s.PRCBS.IRdrCG'W/ZS~P-iOOOuUISmrrOOR..Z"Xt4'aVW~P.

FOB'ERSrRIPOkkq0glOPOWERSUP+XV(I/2POWERSUPPLYIIIDOOR'I"st/W"Sr~~aCAB/ME7.'f48"/r+r)CABIQET'LS I-3(VIVID2JtanoHreowcANoLavoovwaowmvasaumosssEXISTINGLOCALSHUTDOWNIND.CABINETSFIGURE5.21.1

c98BLI110ON1LQIANO2LSI.I SLI.120ONILQ.2ANO2LSI2/ND/AlQ.IIIIIIBLI140ONILSIIANO2LQISU.130ONILQ.2ANO2LQ2RFMO?XLd&/SW'//MESPOWERS'7R/DooRPOWERSuPPLYP-diOOOUMIS7RUTPoeERSUPPLYNOTE:NTFSFORThANDTcTOBEADDEDASPROPOSED MODIFICATIONS IsL/"x///4"wv'Ra/IIIiCABIVE7S/lSI-//!SI-2(LlVI7/)CABIAIFTS 2LSI-If2LSI-2.CJVI7~2gEXISTINGLOCALSHUTDOWNIND.CABINETFIGURE5.21.2 IIIIIIIlMP1.213SLI110MPI223SLI120.II.I4(I(I'tI.'IIII:IIIlI;IINTI110NTI.210NTI~120NTI.220MPI.233SLI130MPI243SU140NTI.130NTI230NTI-140NTI.240Qfl.23SOURCERANOSMONITORPOWERSUPPUESFORMPI-213THROUGH243IlIIII)IIIIIIIIIIIIIIIIIII4PPROX.

Il-24202APPROXGENERALOUTLINEOFPROPOSEDLOCALSHUTDOWNIND.CABINET1LSI-4(UNIT+1)2LSI-4(UNIT+2)FIGURE5.21.3 EXISTINGUNIT2480VBUS21PHC2IHCIMCCI-PHC4r=-~r--ig5QA~ISIQA>-r--iLI5AJI5,Q~gII~IIL5QA>r=-ir--z1504'~IA~

FIELDSPLICEOfCABLETOHEATER,APOSTFIREREPAIR.PRZHTR70kw{UNIT1)PRZHTR70kW{UNIT1)PRZHTR70I<W{UNIT1)SPAREI"1I1504~I15QA~SPARENEWMCCPRESSHTRGROUPNOTES:1)MCCTOBELO-CATEDINFIREZONE8.2)UNIT2SIMILARTOBELOCATEDINFIREZONE26 ALTERNATE POWERSOURCEFORUNIT1PRESSURIZER HEATERSFIGURE5.22

'6.REPAIRSANDCOLDSHUTDOWNOPERABILITY 6.1Introduction AppendixRSectionIII.G.l('a) statesthat:"onetrainofsystemsnecessary toachieveandmaintainhotshutdownconditions fromeitherControlRoomoremergency controlstation(s) is,freeoffiredamage..."

IISectionIII.G.l(b) states:"systemsnecessary toachieveandmaintaincoldshutdownfromeithertheControlRoomoremergency controlstation(s) canberepairedwithin72hours.".SectionIII.L.lstatesthat:"alternative ordedicated

shutdown, capability providedforaspecificfireareqshallbeableto...achieveandmaintainhotstandbyconditions foraPWRandachievecoldshutdownconditions within72hoursandmaintaincoldshutdownconditions thereafter."

SectionIII.L.5states:"equipment andsystemscomprising themeanstoachieveandmaintaincoldshutdownconditions ahalinohbedamagedbyfire~'orthefiredamagetosuchequipment andsystemsshallbelimitedsothatthesystemscanbemadeoperableandcoldshutdownachievedwithin72hours."TheD.C.CookTechnical Specifications definetheseapplicable plantmodesasfollows:HotStandby(Mode3)-Theinitialsafeshutdownstatewiththereactoratzeropower,kefflessthan0.99andRCSaveragetemperature.

greaterthanorequalto350F.tJPage6-1 HotShutdown(Mode4)Reactoratzel0powerkefflessthan0.99andRCStemperature between350Fand200oF.ColdShutdown{Mode5):lReactoratzeropower,kefflessthan0.99andRCStemperature atorbelow200F.Basedonthesedefinitions, bothhotandcoldshutdownareRCScooldovnstatesthatoccurasaresultofreactorheatremovalviatheRHRsystem.Thesystemsrequiredforinitiation andmaintenance ofRCSheatremovalaretherefore identical forboththehotandcoldshutdownregions.Repairofsystemsorequipment requiredtoachievecoldshutdownmustbeaccomplished priortoinitiation oftheRHRsystemandentryintohotshutdownconditions (asdefinedbythetechnical specifications).

ForallfirezonesatD.C.Cook,withtheexception ofthoserequiring completealternative

shutdown, coldshutdownconditions canbeachievedwithin72hoursofafirevithoutrequiring anyrepairactivities.

Forthosezonesrequiring completealternative

shutdovn, onerepairactivity{i.e.,repowering ofanRHRpump)isrequiredandasecondactivity(i.e.,repovering ofpressurizer heaters)flexibility.

Theseare:isproposedtoprovideoperational (1)Repovering ofoneRHRpumpEPS,andfromtheunaffected unit.'s(2)Repowering ofthreebanksofpressurizer heatersfromtheunaffected unit'sEPS.Abankofheatersconsistsofthreeheaterelementsconnected inadeltaconfiguration.

Page6-2 Neitherrepairisrequiredtoachieveinitialhotstandbyconditions afterafire.ItisIndianaandMichigan's CIinterpretation o'ftheprovisions ofAppendixRthatrepairsarenotpermitted toachieveinitialhotstandbyconditions.

Suchrepairsarepermitted duringcooldowninthehotstandbymodetoultimately achievecoldshutdownconditions withinthe72-hourtime-frame permitted byAppendixR.Should.IndianaandMichigan's interpretation oftherepairprovisions ofSectionsIII.G.1(b),

III.L.land'II.L.5 beincorrect, thenIndianaandMichiganformallyrequestsanexemption fromtheseprovisions ofAppendixRwithrespecttothetworepairactivities requiredtoachieveRHRoperation (hotandcold'hutdown) foralternative shutdownmethodAS1.Section6.2providesadescription oftherepair'activities thatwillbeperformed andprovidesthebasisfortheabove-statedexemption request,shoulditberequired.

6.2Pressurizer Heaters6.2.1ReowerinofPressurizer HeatersPressurizer heatershavebeenincludedaspartofsafeprovideonemethodofmaintaining Isufficient reactorcoolantsystempressure.

Adequatemaintenance shutdownequipment, sincetheyofRCSpressureensuresthattheprimarycoolantissubcooled andcorecoolingvianaturalcirculation ismaintained.

InresponsetovariousTMIissues,astudywasperformed todetermine theheatercapacityrequiredtomaintainRCSpressurePage6-3 withanassumedlossofoff-sitepower.Afteraninitialheatlossfromthepressurizer duetoadecreaseinpressurizer level,Tsatwilldecreaseatapproximately 7Fconservatively assumedambientheatlosses.per'hourduetoWiththisassumeddecreaseinsaturation temperature inthepressurizer, lossofadequatesubcooling couldoccur,fivetosixhourslater.Heaterinput'atanytimepriortothisperiodwouldmorethanoffsettheheatlossesassumedandallowsystempressuretobestabilized atanydesiredvalue..Sincethestudyassumedthatdecayheatwasremovedbythesteamgenerator safety.valves,thehighestreactorcoolantsystemtemperature andleastmargintosubcooling wasassumed.Basedonthisandsubsequent

analysis, adequatesubcooling margincanbemaintained withinthereactorcoolantsystemwithamarginofgreaterthanfourhours,assumingnocooldown(useofsteamgenerator PORVs).ShouldcooldownoftheReactorCoolantSystembeinitiated priortothistime,anadequatesubcooling marginwillbemaintained withoutpressurizer heatersforasubstantially longertimeframe.Thesafeshutdownsystemsavailable forallfirezones,including thoserequiring alternative
shutdown, providetheIcapability tocooldowntheReactorCoolantSystemduringhotstandbyatarateof25Fperhour.Thiscooldownisbynaturalcirculation withaflowpathachievedthroughthecoreandtheindividual loops.However,waterintheupperareaofthereactorvesselremainsstagnateandhot.ThecooldownofthisPage6-4' areaofthesystemismostlybyheatradiation andconvection toIUthecontainment.

Whilethecirculating sectionofthesystemcanbecooledmuch',faster, thewaterinthevesselheadlikethatinthepressurizer,'ill beassumedtocoolattherateof7Fperhourandsystemdepressurization willbecontrolled tomaintaina50Fsubcooling marginabovethisvalue.Shouldtheheaterbeunavailable, cooldownoftheloopswillproceedatarateequaltoorinexcessof10Fperhour.Withthesecooldownrates,thepressurizer willcooldownanddepressurize from2235psig(8635F)to435psig(8456F)tnayez'Ladof3Qhouri<andth>>loopswillbecooledtoapproximately 300F,atwhichpointtheRHRsystemcanbeplacedinservice.Assumingcooldownwasinitiated atfourhourspost-fire, morethan36hoursareavailable toinitiateothersystemrealignments andrepowering ofoneRHRpumptopermitentryintoRHRcoolingmode.HotshutdownRHRentryconditions couldtherefore beachieved'ithout pressurizer heaters.Theconclusion canbedrawn,basedontheabovediscussion, forsafeshutdown.

thatpressurizer heatersarenotrequiredIndianaandMichiganhasnotincludedtheheatersin'.itssafeproposedto'nitiateshutdownequipment listingbuthasmodifications toprovideforrepowering oftheheatersinordertoprovideoperational flexibility totheD.C.Cookoperating staff,shouldsuchpostulated firesoccur.Inaddition, theseactivities willprovidethecapability tomaintaincontrolled hotstandbyconditions forextendedperiodsoftime,should.theneed1arise.Page6-5 6.2.2Procedures andMaterialforPressurizer HeaterReowerinAsdiscussed in'ection 5.5.10,a480VMCCwillbepermanently inst.+lied inthefire-affected unitforthisrepairactivity.

ThisMCCwillbepoweredfroma480Vswitchgear circuitbreakerlocatedintheunaffected unit.Sinceaminimumheaterpowerof150KWissufficient forcooldownactivities, threesetsofpowercableswithprefabricated terminations willbestoredattheMCC.Intheeventofafire,thesepowercableswillberoutedfromtheMCCtotheelectr;ical penetrations forrepowering ofthreebanksofpressurizer heaters(onebankofheatersconsistsofthreeheaterelements.connected inadeltaconfiguration).

Eachofthethreeheaterbanksprovidesapproximately 70KWofheat.Thus,repowering ofanythreeheatercircuits(orbanks)fromanyofthebackupheatergroupswillsatisfytheabove150KWrequirement.

Inaddition, thetoolsandprocedures necessary todisconnect theexistingcablingandcompletethesplicetotherepairpowercablingwillbepermanently locatedonsite.Thegeneralprocedure forrepowering theheaterswillbeasfollows:0IVerifythattheunitbackupheatergroup'snormaland!alternate powersourcesaredeenergized; Disconnect theheatergrouppowercablingatthecontainment electrical penetration; Page6-6 0Routethenewpowercablesfromthealternate sourcemotorcontrolcenter(intheaffectedunit)totheelectrical penetration area;Termi'nate therepairpowercabletothecontainment penet'ration inthefire-affected unit;oVerifyappropriate terminations andnotifyoperations thatheatersareavailable foruse;andoEnergizetheheatersasrequired.

6e3ReowerinofRHRPumsForthosefirezonesrequiring thecompletealternative shutdownmethod,repowering ofoneofthefire-affected unit'sRHRpumpfromtheunaffected unitisrequired.

.Rorthesefirezones,lossofpermanent powerand/orcontroltotheRHRpumps4kVbreakercontrolcouldoccurduetolossofthepumps'ircuits orlossofthesupporting EPSpowergeneration anddistribution systemcablesorequipment.

Ratherthanattemptthesubstantial repairactivities associated withre-establishing powertooneoftheaffectedunit'sRHRpumps,?&Mhasproposedtorepowerthepumpusingtheexistingdistribution equipment andcablingwhichprovidespowertooneoftheunaffected unit'sRHRorCTSpumps.Singlefailuresorotherplant,transient conditions neednotbeassumedinmeetingtherequirements ofAppendixR;therefore, bothresidualheatremovalandcontainment spraytrainsandequipment intheunaffected unitcanbeassumedavailable.

Thus,lossofpowertooneresidualheatremovalpumporcontainment spraypumpintheunaffected unitwillnotimpacttheabilityofthatunit.tomaintainstableplantoperating conditions.

Page6-7 Aspreviously discussed, thesafeshutdownsystem'scooldowncapability providesatimeframeofatleast32hourspost-f.ire withinwhichtheRHRpumprepowering repairsmaybe'ccomplished.

Thistimeframe'iswellinexcessofthatnecessary toensureproperrepairactivities.

6.3.1Procedures andMaterials forReowerinofRHRPumShouldrepowering ofoneRHRpumpfromtheunaffected unit'sdpowersourcesberequired, thetemporary powermaybeobtainedfromoneoftheunaffected unit'sRHRorCTSpumps,orfromanunaffected unit4.16kVbreakerasappropriate.

TheIhOandcorporate engineering supportteamswillselection ofthealternative source.materials, toolsandprocedures willbestoredon-site.Thegeneralprocedure forrepowering onepumpisasfollows:o'erifythattheapplicable powersourcesaredeenergized inbothunits;oDisconnect thepowercablingatbothsources;0000Routetherepairpowercablingbetweentheapplicable pumpandsourcelocations; Splicetherepairpowercabletotheunaffected unit'spowercable;Meggerandhi-pottesttherepairedcable;Terminate therepairedcabletotheaffectedunit'sRHRpumpmotor;Verifyproperterminations, checkforpropermotorrotationandnotifyoperations; Aligntheappropriate RHRsystemvalves;andClosetheassociated 4kVbreakerfromtheControlRoomoftheunaffected unit.Page6-8 6.4Conclusions

~+Inaccordance withtheprovisions ofAppendixR,Indianaandl<rMichiganhasdemonstrated.

theabilityofachieving coldshutdownconditions forallfiresassumedatD.C.Cookwithinthe72-hou'rtime-frame permitted bytherule.IndianaandMichiganIrecognizes thattheprovisions ofAppendixRdonotrequireplantoperating personnel toattaincoldshutdownconditions ofthefire-affected unitwithin72hoursshouldafireoccuratD.C.,Cook.However,operating procedures, repairprocedures andmodifications willbeprovidedthatpermitthecapability ofachieving coldshutdownwithi'nthetimeperiod.Procedures alsoEwillbestructured toprovidetheoperating staffwiththenecessary flexibility todetermine theappropriate post-fire activities and.plant,conditions thatwillmaintainD.C.Cookin,themoststablesafeshutdownstatepossible.

Page6-9 4a 7.EXEMPTION REQUESTSANDANALYSES7.1Introduction Asafeshutdownanalysishasbeencompleted fortheD.C.CookNuclearPlantinthefireareasdesignated inTablel-lofthisreport.Asaresultofthatanalysis, llareaswereidentified inMarch1983thatrequireexemptions fromthespecificrequirements ofAppendixR,SectionIII.G.Eightoftheelevenexemptions arefromSectionIII.G.3andtheremaining threearefromSectionIII.G.2.Twoadditional technical exemptions wererequested inJune1984.Theseexemption include(1)ventilation ductpenetrations intheAuxiliary Buildingnotsuppliedwithfiredampers,and(2)seismicgapsbetweentheContainment andAuxiliary Buildings.

Thissectiondocuments thesafeshutdownsystemsandfirehazardsanalysesperformed onthese13areasandprovidesthebasesbywhichtheexemption requestsare.justified.

Asaresultoftheproposedalternative shutdowncapability, eightareasrequireexemptions fromSectionIII.G.3,inthatafixedsuppression systemisnotinstal'led inthearea.Theyareidentified asfollows:(1)TheUnit1andUnit2Transformer Rooms(FireZones14.and20)locatedintheAuxiliaryBuilding (2)TheUnit1andUnit2ESWPumpRooms(FireZones29A,29B,29Eand29C,29D,29F)locatedintheScreenhquse Page7-1 (3)TheUnit1andUnit2mainsteamlineandvalveenclosures (FireZones33,33A,33B,105and34,34A,34B)locatedintheoutsidecontainment annulusarea(4)TheUnit1andUnit2MainControlRooms(FireZones53and54)locatedintheAuxiliary Building.

Thethreeexemptions requested fromSectionII'I.G.2arefortheRHR/CTSpumparea(FireZones1,1Athrough1H,136,137,(138A,138Band138C)theESWpumpbasement(FireZone29G),andthesouthendofelevation 609ftoftheAuxiliary Building(FireZone44S).Subsequent totheMarch1983submittal, theimplementation ofproposedmodifications wascommenced.

Duringthisperiod,variousproposedfireprotection modifications eithercouldnotbephysically implemented orwouldnotachievetheintendedlevelosprotection orconformance.

Reviewsofthefireareaboundaries wereperformed andadditional unprotected orunsealedopenings, ductsordoorswereidentified.

Engineering revaluations wereperformed toresolve.theabovementioned issuesandassuch,additional

'modifications wereproposedand/orjustifications wereprovidedfortheunsealedorunprotected

openings, ducts,doorsorhatches.Theeng'ineering evaluations thatwereperformed towithdrawtheproposedmodifications mentioned intheexemption requestshaveanalyzedtheimpactonredundant safeshutdowncapability orthebasisfortheexemption request.Dur'ingthisper'i:od, twoadditional technical exemptions werealsorequested.

Theseexemptions arepresented inSubsections 7.13and7.14.Page7-2 Eightexemption requests(Subsections 7.13through7.20),submitted inMarch1983,werenolongerrequired; assuch,thoseexemption requestswerewithdrawn.

Subsections 7.13through7.20oftheMarch1983submittal wererequestsforexemptions fromthefixedsuppression systemrequirements ofSectionIII.G.3forFireZones66,67,74,75,120,121,122,and123.Basedonfurtherdiscussion withtheNRCStaffandtheirclarifications oftheIII.G.2andIII.G.3provisions, IndianaandMichiganElectricCompanyhasformallywithdrawn theexemption requestsforthesefirezones.It.is,.IndianaandMichiganElectricCompany's presentunderstanding thatthefirehazardsanalysispreviously conducted andmodifications proposed(with,the,exception ofthe.edetection.

system)will.achieve,compliance,

~withthefireprotection provisions, ofAppendix, R*SectionIII.G.2(d),-and (f)forthesefirezones..'"

Theproposed'odification toinstallautomatic detection systemstdetection isnotrequired, tois.therefore withdrawn sinceachieveadequatefireprotection compliance withtheprovisions ofSectionIII.G.2(d) or(f).Section9ofthisreportpresentstheengineering evaluations performed sinceMarch1983.Theexemption requestswerereviewedfortextchangesthatwererequiredasaresultoftheevaluations.

Theevaluations demonstrate thatthereisnoimpactoneitherredundant safeshutdowncapability orthebasesandconclusions oftheaffectedexemption.

Inaddition, someeditorial changeswerealsomadetoprovidefurtherclarification fortheexemption request.Page7-3 Theexemptions requested inSubsections 7.2through7.12arebasedontheconditions and"configurations ofD.C.CookasofMarch1983.Theexemptions requested inSubsections 7.13and714basedontheconditions andconfigurations ofD.C.CookasofJune1984.,Insomeinstances, evaluations wereperformed tojustifynot,implementing modifications.

Theseevaluations arepresented in'Section9ofthis.reportandarebasedontheconfiguration oftheD.C.Cookplantattheendofthe1986Unit2refueling outage.Inaddition, duetoongoingeffortstocomplywith10CFR,50AppendixRandsubsequent

".generic,NRC" clarifications, variousmodifications inconjunction withtheperformance ofengineering evaluations haveresultedinrevisions tovariousrequested exemptions."

  • Theserevisions arebasedon4theexisting, configuration ofthe".D.C.Cookplant-atthe'endofthe1986Unit.2refueling outage.Therequested exemptions inSubsections 7.2through7.12weresubmitted in1983andtherequested exemptions inSubsections 7.13and7.14weresubmitted in1984.Theseexemptions havebeenreviewedbyNRCStaff,andSERswereissuedapproving theconfiguration andseparation ofthesafeshutdownsystemsin:thefirezones,ofconcern,aswellastheadequacyoffireprotection features.

Additional fireprotection modifications areproposedtoprovideaddedassurance thatatleastonetrainofredundant safeshutdownequipment remainsfreeoffiredamage.Inparticular, Page7-4 eextensive fireprotection modifications arebeingproposedintheControlRoomsandintheareaofthecomponent coolingwaterpumps.Thefollowing sectionsprovidethedetailsofthesafeshutdownsystemsandfireprotection analysesperformed; thesesectionsalsodemonstrate thatstrictcompliance withSectionIII.G.ofAppendix.-Rwouldnotenhancefire.protection safetyabovethatwhichisprovidedbytheproposedcommitments.

Thefollowing exemption requestsare.contained inthissection:Subsection 7.27.3DescritionAutomatic.

suppression exemption requestforFireZones1,lAthroughlH,136,137,138Athrough138C,RHR/CTSpumparea,Auxiliary

Building, el:573ft,Fixedsuppression exemption requestfor.,FireArea14,Transformer Room,el591ft,Unit1Pacae7.4Fixedsuppression exemption requestforFireArea20,Transformer Room,el591ft,Unit27-247.57.6Fixedsuppression exemption requestforFireZones29A,B,E,Unit1ESWpumpsandMCCs'ixed suppression exemption

'equestforFireZones29C,D,F,Unit2ESWpumpsandMCCsAutomatic suppression exemption requestforFireZone29G,Screenhouse Auxiliary MCCRoom,el575ft,bothunits7-297-367-43Page7-5 7.87.9Fixedsuppression exemption FireZones33,33A,33B,and105,Unit1EastMainSteamValveEnclosure andContractor AccessControlBuildingFikedsuppression exemption FireZones34,34A,.34B,Unit2EastMainSteamValveEnclosure 7-527-587.10One-hour-rated enclosure exemp-'ion requestforFireZone44S,Auxiliary BuildingSouth,el609ft,bothunits7-647.11Fixedsuppression exemption requestforFireArea53,Unit1ControlRoom7-757.12Fixedsuppression exemption requestforFireArea54,Unit2ControlRoom7-827.13Fire-rated damperexemption requestforAuxiliary BuildingHVACDuctPenetrations forFireZones1,6N,6S,44N,44S,49,50,52and697-897.14Fire-rated sealexemption request7-107forContainment BuildingseismicgapsforFireZones7,8,9,10,11,1222g23g2425262733B/34B,38,39,49,50,69,108and109Page7-6 7.2RHR/CTSPumArea,AuxiliarBuildin,Elevation 573ftEXEMPTION REQUESTPertheprovision of10CFR50.48(c)(6) and10CFR50.12,IndianaMichiganElectricCompanyrequestsexemption fromthespecificrequirements ofAppendixRSectionIII.G.2;i.e.,anautomatic firesuppression systemshallbeinstalled inthearea.7.2.1AreaDescritionTheRHR/CTSPumpArea,whichcontainsFireZones1,lAthrough1H,136,137,138A,138Band138C,islocatedintheeastcentralsub-basement flooroftheAuxiliary Buildingatelevation 573ft.Theareacontainsalargeareacommontobothunits,eightindividual cubi.cles containing residualheatremovalpumpsandcontainment spraypumpsfor,bothunits,threeindividual cubicles.containing CVCS.hold-uptanks,and.twopipetunnels.that'relocatednorthandsouthofFire,Zone1.;These-locations have'owcombustible loading,,-

arebehind,lockedaccessgates,arenotnormallyaccessible, andcontainnosafeshutdownequipment orcables.Assuch,theyarenot,mentioned elsewhere inthisexemption request.Eachoftheeightpumpcubicleshasacontrolled accessscreenmeshdoorthatislocatedbehindamissileshieldwall.Asectionofthewallformingtheentrancewayisprovidedwitharemovable blocksection(4ftx5ft)forpumpmaintenance.

Theblocksarereinforced withanumberofperpendicular lengthsofsteelchannelaffixedtothepermanent sectionofthewall.Page7-7 TheRHRpumpsofeachunit'reseparated from'eachotherbythree-hour constructed wallsrunningnorthandsouth.TheUnit1pumpsareseparated fromtheUnit2pumpsbyapproximately 23ftbetweenthewallsformingtheentranceway.Thefloor.and,cei.ling

...barriersarealsoofth'reeh-ourconstruction..'The'ccess','doors arescreenmeshforventilation purposes; however,themissile.-'shield walls,approximately 14ftinlengthforminga"T"attheentranceways,extendbeyondthewidthofthedoorway.Theentranceways to'he"pumpcubicles're<<

providedwithcurbs6incheshigh.Thesuctionvalvesforthepumpineachcubicle",arelocated.;.behind part-height missile"'hield

'walls'rovided.

withanaccessway

  • and='a,3ft.6in.-high'urb'orming partof;-'themissile'shield.

Thecenterlines of'.the,'RHR pumpsarelocatedapproximately 1~2ftfromtheentrance;ways of'thecubiclesandapproximately 4ftfromthewalldividingthepumpsfor,eachunit.Theindividual pumpcubiclesareprovidedwithfloordrains.Entrytotheareaisfromelevation 587ftviaastairwaythatislocatedinthecommonsectionbetweentheUnit'1andUnit2RHRpumpcubicles.'.

Twoelevators alsoaccesstheareaonepassenger andonefreight.Pertinent roomdimensional dataiscontained inFireAreaSummaryEvaluation Table7.2-1andFigure7.2.Page7-8 7.2.2SafeShutdownEuimentThisfireareacontainstheUnit1residualheatremovalpumps(PP-35EandPP-35W)locatedinthenorthcubiclesandUnit2residualheatremovalpumps(PP-35EandPP-35W)inthesouthcubicles.

Thesuctionvalveforeachpumpislocatedintherespective cubicle.behindmissile.:shieldwalls.(IMO-310 forPP-35EandIMO-320forPP-35W).Thecontainment spraypumpsarelocatedinindividual cubiclesalso,butarenotnecessary forsafeshutdown.

Thepowercable...associated" with=theRHRpumpsentersthefireareathroughconcrete-embedded

.conduitandisroutedintotheindividual, pumpcubicles.,

-Cablefor:theRHR.pumpsuction,valves.and,the"minimumflow,,valves

..is.present",in thecommonarea'etween theUnit1andUnit-2,,pumpcubicles.

.Each.pump'.cubicle"-

containsonlythe"components and-cabling.associated withthatpump.Acableforthe.green.trainUnit2chargingpumplubeoil"pumpisalsointhecommonzone;however,allotherUnit2andUnit1CVCSsafeshutdowncablesarelocatedoutsideofthisfirearea.7.2.3FireProtection SstemsThisfireareacontainsnoautomatic suppression systems.1manuall-l/2-in.

hosereelwithadjustable anglespraynozzleislocatedinthecommonfirezone.Four20lbABCdrychemicalextinquishers, four15lbCO2extinguishers anda1-inchCO2hosereelof150ftlengtharealllocatedinthefirearea.Page7-9 Thisfireareaisequippedwithsevenionization smokedetectors thatalarmintheUnit",'Control:Room ontheEmergency FirePanel.Nodetection existsintheindividual pumprooms.7.2.4FireHazardsAnalsisThisfireareaisconstructed insuchawaythateachresidualheatremovalpumpisseparately locatedin'nindividual roomisolatedfromitsredundant divisionbyaconcretewall.Eachpumproomhasanaccesscontrolgatethatisaccessible fromthecommonareaseparating Unit1fromUnit2.Theaccessgatesforeachroomare,located.behindmissileshieldwallsthatforma>T"infrontofthepumproomsof'achunit.Theshieldwallfunctions asaradiant"energyshieldproviding protection fromfiresoutside'he, pump:-cubicles.

Eachpumproom-hasfloordrainsandthepump.rooms.arecurbedattheentrancedoors.Anexhaust'.ventilation.

duct,.is"providedforeachRHRpumpcubicle.Theseductsareroutedtoa,commonverticalairshaft.AseparateairshaftisprovidedforeachunittoconnecttheUnit1EastandWestPumpRoomsandtheUnit2EastandWestPumpRooms,respectively.

Thefireareahasafixedcombustible loadingofunder20,000Btu/ftforanequivalent fireseverityofunder15,minutes.'Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare4079Btu/ft2and2.9minutes,respectively.)

Nospecificsectionsofthefireareathatcontainhighdensities ofcombustible materials exist.Page7-10 Transient combustibles arenotcarriedthroughthisfirezoneastheaccessiseitherviaanelevatororastairway.

Theindividual pumproomsareseparated byll't4in.centerline-to-centerline withaconcretewallmidwaybetweeneachroom.Thecubiclesareconstructed suchthatthedistancefromonepumptoanother,asmeasuredby,existingonecubicleandenteringtheother,isgreaterthan20ftwithnointervening combustibles.

Theproposedmodifications willupgradethewallsseparating thepumpstothree-hour barriers.

Theexistingventilation ducts,that,could~transmit.hot.combustion gasesfromonepumpcubicletoitscounterpart willbeprotected withfire-rateddampers..

Withthese.:modifications,

.afireinonecubiclemusttravelthecircuitous, pathvia,,the""

accessgateslocated'behindthemissileshield"-enclosures~",from

.one,.cubicle toththerinordertoaffectboth,'pumps,:of, oneunit./A'fireinthecommonsectionbetween,-units would".have.totravelbehindthe-missile,shieldwall(approximately 14ftlong}andenterbothredundant pumpcubicles.

Thusconstructed, nomodifications totheaccesscontrolgates,formedofscreenmeshforventilation

purposes, areproposed.

ITheconduitsforthepowercables.'f thefour.RHRpumpsarelocatedinthecommonUnit1and2-area.Theredandgreentrainsofeachunitareseparated byapproximately 17ft.The.conduitsforthereddivisionpumpsofbothunits(1PP-35Wand2PP-35W)willbeprovidedwithone-hourprotection fromanPage7-11 exposurefire;Duetothelength'ftimebeforewhichtheRHRsystemmustbeinoperation,

<<'-thesuctionvalveswillbemanuallyoperatedattheappropriate time.Theceilingsinthepumpcubicleshaveverticalpipe,exitingthroughsleeves.Thepenetrationwillbeprovidedwit'hsealstopreventafirein.oneofthecubiclesfromaffecting anycomponents intheelevation above.Eachpumpcontainstwogallonsoflubricating oil;however,absentanyignitionsourcethissmallquantityofoilpresentsnothreattoredundant,safe,:shutdown equipment.

7<.2.5ProosedModifications Thefirehazardsanalysisperformed revealedthatthisfireaxeaisnot',in-compliance withAppendix' and,as'result,thefireareawillbeupgradedwith'fireprotection modifications.

7.2.5.1Ventilation DuctsTheventilation ducts'connecting eachunit'seastandwestRHRpumproomswillbeprovidedwiththree-hour-rated firedampers.Anengineering evaluation hasbeenperformed justifying thelackoffire-rated dampersintheexhaustventilation ductsoftheCTSpumpcubicles.

SeeSubsection 9.4forthisevaluation.

Theexemption requestinSubsection 7.13providesjustification forexistence ofundampered ventilation ductspenetrating throughtheceilingofFireZone1.Page7-12 7.2.5.2Penetrations

,Thepenetrations inthewallseparating theEastandWestPumpRoomsofeachunitwillbeprovidedwiththree-hour-"'rated fireseals.Thepenetrations throughtheceilingtotheaboveelevation willbeprovidedwithatleastone-hour-rated fireseals.Engineering, evaluations have'.beenperformed justifying theexistence

.oftheunratedopeningsintheceilingofFireZoneslAthrough1Hforleakagedetection purposes.

Theseleakagedetection chasesconnectRHRandCTSpumproomstotheirrespective heatexchanger cubicles.'he chasespassthroughthefirezonesinwhichthechargingpumpsarelocated.Thesezonesarelocatedbetweenthepump,andheatexchanger

cubicles, withsteelplatecoversproviding:

access.'into':the'.

chasesforleakdetection

-purposes.;

SeeSubsections,'-9.31

'and9.32fortheseevaluations.

7.2.5.3AreaDetection Additional areadetection willbe'rovided toincludetheindividual pumproomsfortheeightpumpsinthefirearea.7.2.5.4RHRPumPowerCablesThe4-inchconduitscontaining thecableforredundant divisions ofeachunitarepresentintheextremenorthwest andsouthwest cornersofthecommonareabetweenunits.Thereddivisionpumppowerconduits(8003R-1and8003R-2)willbeprovidedwithfireprotection barriersequivalent toaone-hourrating,thusensuringavailability ofonedivisionperunit.Page7-13 7.2.S.S~StairwaaModifications willbe"madeforstairvaysuppression inaccordance withSubsection 8.2.2.7,.2.6Conclusion tBasedonthepreviousanalysis, exemption's requested fromanautomatic suppression systemintheareasasprescribed inSectionIII.G.2ofAppendixR.exemption aresummarized asfollows:Thebasesthatjustifythe(2)Thewallsseparating RHRpumps.villbeupgradedtothree-hour ratingsandthec'eilingpenetrations aretobeupgradedproviding aone-hourfirerating.Theconduitscontaining cablesforthereddivisionpumpofeachunitaretobeprovidedwithone-hourprotection.

(3).Theexistingdetection systemistobeextendedtoincludeeach'oftheeightindividual pumprooms.'-(4)(5)(6)'(7)Theventilation

,systemconnecting redundant.RHR pump.cubicles:is tobe-*provided withthree-hour-rated firedamperstoprovideseparation ofredundant divisions.

Thefixedcombustible loadingisunder20,000Btu/ftvithnoallowable storageoftransient combustibles.

The,fireseverityislessthan15'inutes, vithanexistingfireseverityofapproximately threeminutes.Theindividual pumproomsareconstructed topreventfirefromleavingonepumproomandenteringanotherorfromenteringtwopumproomsfromthecommonarea.Nointervening combustibles arepresentthatpresentahazardtothetworedundant divisions ortoeachunit'sreddivisions.

(8)Modifications requiredtomeetSectionIII.G.2wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments.

Page7-14 (9)TheRHRsystem.isnotrequiredtooperateformanyhoursafterthefire,andvalvesatthattimewillbemanuallyalignedtoinitiateMode4operation.

(10)Repowering ofRHRpumpsforcoldshutdownisavailable foranyRHRpumpwithfireaffectedpowercable(seeSection5).(11)Subsections 7.13,9.4,9.31,9.32and9.33providethefirehazardsanalysesand/orsafe.shutdownevaluations performed tojustifytheexistence, of.unratedboundarycomponents inthisfirearea.Page7-15 SUMMARYEVALUATION TABLE7.2-1FIREAREA:FireZone1,1AthroughlH,136,137,138Athrough138CDESCRIPTION:

RHR/CTSPumpArea,Auxiliary

Building, Elevation 573ftEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction a.WallsNorth-reinforced concrete.,

inexcessofthree-hour.ratingSouth-reinforced

concrete, hourratingEast-reinforced
concrete, hourratinginexcessofthree-"inexcessofthree-West-reinforced
concrete, inexcessofthree-hourratingb.Floor-reinforced
concrete, inexcessofthree-hourrating;flooriscurbedandhasdrainsc.Ceiling-reinforced
concrete, inexcessofthree-hourrating2.3.4~5.6.Ceilingheight"-llft3in.Area-14,450ft2Areavolume-229,926ftVentilation

-36,000cfmAccessinZone-Unobstructed Page7-16 SafeShutdownEquipment IMO-310RHRPumpSuction(Units1&2)PP-35ERHRPumpEast(Units1G2)IMO-320RHRPumpSuction(Units162)PP-35WRHRPumpWest(Units162)C.FireHazards1.Typeofcombustibles inarea-Cableinsulation

'ubeoilCellulosics ClassBsolventsPlasticsRubber2.3.Totalfixedcombustible loadingconsidered forthepurposeof-theanalysis-20,000Btu/ft"Actualquantityoffixedcombustibles-Cable-17,448,738 Btutubeoil-.16,607,100 Btu'tCellulosics

-18,223,822 BtuClassBsolvents-3,102,000 BtuPlastics-2,803,000 BtuRubber-15,800,975 BtuTOTAL-4079Btu/ftD.ExistingFireProtection 1.FireDetection Systems-Ionization, with7detectors AlarminUnit1ControlRoomonEmergency FirePanelPage7-17 2.FireExtinguishing Systems-Manual4-20lbABCdrychemicalextinguishers 4-15lbC02extinguishers 1-C02hosereelwith150ft1in.hose1-waterhosereelwith75ft1-1/2in.hoseandadjustable anglespraynozzlePage7-18 7.3FireArea14Transformer Room,Elevation 591ftUnit1EXEMPTION'EQUEST Pertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemption fromthespecificrequirements ofAppendixRSectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinstalled inthefirearea.7.3.1AreaDescritionLocatedimmediately northoftheUnit1"CD"DieselGenerator Roomatelevation 591ft,FireArea14hasthree-hour-ratedwalls,floorandceiling,exceptfortwo1-1/2hourdamperstotheTurbineBuildingandanunratedfieldfabricated fusiblelinkguillotine-type dampertotheUnit1DieselOilPumpRoom(FireArea13).Subsection 9.7presentsthe.engineering evaluation thatwas.performed, tojustifythisunrateddamper.ThisfireareahasthetwoUnit1pressurizer heatertransformers locatedapproximately 12ftapartandthetwoUnit1emergency dieseltestbreakers.

Accesstotheareaisthroughanunlabeled doorbuilttoathree-hour ratingapproximately 12ftwidethatfacestheTurbineRoom.Pertinent roomdimensional dataiscontained inFireArea14SummaryEvaluation Table7.3-1andFigure7.3.7.3.2SafeShutdownEuimentFireArea14containsthepressurizer heatertransformers forUnit1(TRllPHAandTRllPHC),

which'renotrequiredforsafeshutdownbutidentified foroperational, flexibility, andtheUnit1emergency dieselgenerator testbreakers(DGTADandDGTCD)withassociated cables'.Page.7-19 7.3.3'ireProtection SstemFireArea14presently containsnoautomatic suppression ordetection system.Amanuall-l/2in.waterhosereel(75ft)-withadjustable waterspraynozzleisadjacenttothefirearea.'Two20lbPurple-Kdrychemicalandtwo15lbCO2extinguishers arelocatedinthearea.7.3.4FireHazardsAnalsisFireArea14isboundedbythree-hour-rated barrierswiththeexception of(a)twodampers,eachratedl-l/2hours,locatedinthewestwalltoFireZone<79,theTurbineRoomofUnit1,and,(b)anunratedfieldfabricated fusiblelinkguillotine-type

-<<dampertotheUnit1DieselOil'umpRoom(FireArea13)."Subsection

.9.7presentstheengineering evaluation thatwaspperfo'rmed,to justifythisunrateddamper.Inaddition, the~accessdooris:.specifications.

anunlabeled roll-updoorbuiltto'three-hour Theemergency dieselgenerator testbr'eakers arelocatedapproximately 40ftapart.Thepressurizer heatertransformer's arenoncombustible and'pproximately 12ftapart.Theareahasafixedcombustible loadingofunder13,000Btu/ftforanequivalent fireseverityofunder10minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare1056Btu/ftand0.8minute,respectively.)

TherearenospecificsectionsofthefireareaIthatcontainhighdensities ofcombustible materials.

Page7-20 Afireinthisfireareacouldaffectbothemergency dieselgenerators andthepressurizer heatersforUnit1andconsequently wouldaffecttheemergency powersystemsinUnitl.AllUnit2systemsareunaffected byafireinthisareaand,thus,alternate shutdowncapability existsusingUnit2systems.7.3e5ProosedModifications TheFireArea14willbeequippedwithautomatic detection withalarmingfunctions intheUnit1ControlRoom.Asalternate shutdowncapability existsusingUnit2systems,noothermodifications areproposed.

forthisfirearea14.-7.3.6Conclusion Basedon,thepreviousanalysis,

'nexemption isrequested'rom therequirement thatafixedsuppression

'system.'e'installed:

inareaswherealternate shutdowncapability exists"as.prescribed'n SectionIII.G.3ofAppendixR.'-,The,basesthatjustify'.the".

exemption aresummarized asfollows:Alternate shutdowncapability existsusingUnit2systems.(2)(3)(4)Themodifications proposedincludetheinstallation ofanautomatic detection systeminthefirearea.The.fireareahasaminimumratingofonehour.Thecombustib/e loadingofthefireareaisunder13,000Btu/ftandfireseverityiscalculated tobelessthan10minutes.(5)(6)Modifications requiredtomeetSectionIII.G.3wouldnotsignificantly enhancefireprotection safetyabovethat.areprovidedbypresentcommitments.

Subsection 9.7providesthefirehazardsanalysisperformed tojustifytheunrateddampertoFireArea13.Page7-21 SUMMARYEVALUATION TABLE7.3-1FIREAREA:14DESCRIPTION:

Transformer Room,Elevation 591ft,Unit1EVALUATION PARAMETERS SUMMARYA.AreaDescription 1.Construction-a.WallsNorthSouthEast-reinforced

concrete, inthree-hour ratingreinforced
concrete, inthree-hour ratingreinforced

.concrete, inthree-hour ratingexcessofexcessofexcessofWestb.Floorc.Ceilingreinforced

concrete,

.inthree-hour ratingreinforced

concrete, inthree-hour ratingreinforced
concrete, inthree-hour ratingexcess'fIexcessofexcessof2.3.5.6.Ceilingheight-12ft7in.Area-2072ftRoomvolume-25,900't3Ventilation

-18,000cfmAccessinZone-Unobstructed Page7-22 B.SafeShutdownEquipment TRllPHA-4kV/480VTransformer 11PHATRllPHC-4kV/480VTransformer llPHCC.FireHazards1.Typeofcombustibles inarea-Cableinsulation PlasticsRubber2.Totalfixedcombustible loadingconsidered jor'hepurposeoftheanalysis-13,000Btu/ft3.Actualquantityoffixedcombustibles-Cable-1,322,400 BtuPlastics-767,025BtuRubber-100,800BtuTOTAL-1056Btu/ftD.ExistingFireProtection 1.FireDetection Systems-None2.FireExtinguishing Systems-2-20lbPurple-Kdrychemicalextinguishers 2-15lbC02extinguishers 1-waterhosereelwith75ftl-l/2in.hoseandadjustable waterspraynozzlePage7-23 7.4FireArea20Transformer Room,Elevation 591ftUnit2EXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6)'and 10CFR50.12Indianaand,MichiganElectricCompanyrequestsexemption fromthespecificrequirements ofAppendixRSectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinstalled inthefirearea.7.4.1AreaDescritionLocatedimmediately southoftheUnit2"AB"DieselGenerator Roomatelevation 591ft,FireArea20hasthree-hour-ratedwalls,floorandceiling,exceptfortwol-l/2hourdamperstotheTurbineBuildingandanunratedfieldfabricated fusiblelinkguillotine-type dampertotheUnit'DieselOilPumpRoom(FireArea21).Subsection 9.8presentstheengineering evaluation thatwasperformed tojustifythisunrateddamper.AThisfireareahasthetwoUnit2pressurizer heatertransformers locatedapproximately 12ftapartandthetwoUnit2emergency dieseltestbreakers.

Accesstotheareaisthroughanunlabeled doorbuilttothree-hour specification approximately 12ftwidethatfacestheTurbineRoomforUnit2inthewestwall.Pertinent roomdimensional dataiscontained inFireArea20SummaryEvaluation Table7.4-1andFigure7.4.7.4.2SafeShutdownEuimentFireArea20containsthepressurizer heatertransformers forUnit2(TR21PHAandTR21PHC),

whicharenotrequiredforsafeshutdownbutidentified foroperational flexibility, andtheUnit2emergency dieselgenerator testbreakers(DGTABandDGTCD)withassociated cables.Page7-24 7.4.3FireProtection SstemFireArea20presently containsnoautomatic suppression ordetection systems.Amanuall-l/2in.waterhosereel(75ft)withadjustable waterspraynozzleisadjacenttothefirearea.Two20lbPurple-Kdrychemicalandtwo15lbC02extinguishers arelocatedinthearea.7.4.4FireHazardsAnalsisFireArea20isboundedbythree-hour-rated barrierswiththeexception of(a)twodampers,eachratedatl-l/2hours,locatedinthewestwalltoFireZone85,theTurbineRoomofIUnit,2,and(b)anunratedfieldfabricated fusiblelinkguillotine-type dampertotheUnit2Diesel.'OilPumpRoom(FireArea21).,Subsection,,9.8 presents",the engineering evaluation thatwasperformed,to justify,thi'sunrateddamper..Inaddition, theaccessdoorisanunlabeled roll-updoorbuilt'othree-hour

'specifications.

Theemergency dieselapproximately 35ftapart.generator testbreakersarelocatedThepressurizer heatertransformers TheareahasafixedBtu/ftforanequivalent fireseverityofunder15minutes.arenoncombustible andapproximately 12ftapaxt.combustible loadingofunder20,000(Theactualcombustible loadingexistingatthistimeare1503tively.)andequivalent fireseverityBtu/ftand1minute,respec-2Page7-25 Afireinthisareacouldaffectbothemergency dieselgenerators andthepressurizer heatersforUnit2andconse-Pquentlywouldaffecttheemergency powersystemsinUnit2.AllUnit1systemsareunaffected byafireinthisareaandthusalternate shutdowncapability existsusingUnit1systems.7.4.5ProosedModifications FireArea20willbeequippedwithautomatic detection withalarmin'g functions intheUnit2ControlRoom.Asalternate shutdowncapabi.lity existsusingUnit1systems,noothermodifications are.proposedforthisfirearea.7,',.4.6ConclusionBasedonthepreviousanalysis,;exemption isrequested fromtherequirement thatafixed.'uppression system'einstalled inareas.wherealternate"shutdown capability existsas'prescribed i.'nSectionIII.G.3ofAppendixR.-Thebasesthat'justifytheexemption aresummarized asfollows:l(1)Alternate shutdowncapability existsusingUnit1systems.(2)Themodifications proposedincludetheinstallation ofanautomatic detection systeminthefirearea.(3)Thefire,areahasaminimumratingofonehour.(4)Thecombustible loadingofthefireareaisunder20,000Btu/ftandfireseverityiscalculated tobelessthan15minutes.(5)Modifications requiredtomeetSectionIII.G.3wouldnotsignificantly enhanc'efireprotection safetyabovethatprovidedbypresentcommitments.

(6)Subsection 9.8providesthefirehazardsanalysisperformed tojustify-the unrateddampertoFireArea21.Page7-26 SUMMARYEVALUATION TABLE7.4-1FIREAREA:20DESCRIPTION:

Transformer Room,Elevation 591ft,Unit2EVALUATION PARAMETERS SUMMARYA.AreaDescription 1.Construction-a.WallsNorth'SouthEast'.~Westb.Floor,c.Ceilingreinforced

concrete,
three-hour rating-.reinforced
concrete, three-hour rating-reinforced
concrete,

,.three-hour ratingreinforced "concrete, three-hour ratingreinforced

concrete,

,three-.hour, ratingreinforced

concrete, three-hour ratinginexcessofinexcessof.inexcessofinexcess$K~ofinexcessofin:-.excess

'o&2.,3~'5.'6.Ceiling,height-12ft7in.Area-2072ftRoomvolume-25,900ftVentilation

-18,000cfmAccessinZone-Unobstructed Page7-27 B.SafeShutdownEquipment TR21PHA-4kV/480VTransformer 21PHATR21PHC-4kV/480VTransformer 21PHCC.FireHazards1.Typeof.combustibles, inarea-Cableinsulation PlasticsRubber2.Totalfixedcombustible loadingconsidered forthepurposeoftheanalysis-20,000Btu/ft~3..Actualquantityoffixedcombustibles-Cable-1,558,619 BtuPlastics-1,457,'250 BtuRubber-100,800'Btu TOTAL.-1503Btu/ftD,'.,'xisting

-Fire.Protection 1.Fi;reDetection Systems.-None2.FireExtinguishing Systems-Manual2-20lbPurple-Kdrychemicalextinguishers 2-15lbC02extinguishers 1-water'hose reelwith75ftl-l/2in.hoseandadjustable waterspraynozzlePage7-28 7.5FireZone29(A,B,E)Unit1Essential ServiceWater,PumsandMotorControlCentersEXEMPTION REQUESTPertheprovisions of10CFR50(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemption fromthespecificrequirements ofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinstalled inthearea.7.5.1AreaDescritionFireZone29(A,B,E)islocatedontheeastcentralsideof'hescreenhouse, thatisadjacenttotheTurbineBuildingelevation 591ft'.Thefire'zone~is'comprised ofthetwopumpcubiclesforUnit1ESWpumps.(PP-lEandPP-1W)each.locatedinmissile-barriered enclosures.

anda'separate.

cubiclefor'themotorcontrolcenters.,(lPS-A'and 1PS-D)...Fire Zone29"(A,'B,~E)is thecounterpart ofUnit'2Fire,Zone29(C,D,F).Accesstothepumpsisgainedthroughthenorthsideaccess'ontrol gatefromthescreenhouse area.Theaccessgateisconstructed ofscreenmeshforventilation purposes.

Additional ventilation isprovidedthr'oughundampered ductopeningsintheceilingof29Aand29BtoprovidecoolingtotheESWpumps.;Subsection 9.25presentstheengineering evaluation "thatwasperformed tojustifytheseundampered ventilation ductopenings.

Thepumpcubiclesshareacommoncorridorwithawallseparating thepumpsandamissileshieldperpendicular tothe.wallpartially enclosing thepumps.Thepumpsareinstalled onPage7-29 pedestals approximately fourfeetofftheground.Theeast/west wallseparating thisUnit1zonefromtheUnit2zoneisthree-hour-rated.

Astairwayispresentinthenorthwest cornerofthewestpumproomFireZone29Bthat.accessesFireZone29G,thelevelimmediately belo~,theUnit'1'and'nit 2ESWpumpareas.11HThemotor.controlcentersarelocatedadjacenttoeachother-inacommonenclosure withascreenmeshaccesscontrolgateprotected byamissileshieldwall.Pertinent roomdimensional dataiscontained:"in Fi'reZone'9(A,B,E)"Summary Eval'uation Table7.5-1and-Figures7.5.1;through "7.5.3.7.'5.2,SafeShutdownSstemsFireZone29,(A,:.B, "E).containsbothESWpumpsforUnit1W(PP-lE.and.;PP-lW),~th',st'rainers

.forboth""pumps,(ESWSEandESWSW),the-discharg'e

.valvesforbothpumps(WMO-701 andWMO-702),

'and-both motor,'controlcenters(1PS-Aand1PS-D)thatservethestrainers andvalves.No-Unit2andnootherUnit1safeshutdowncableorequipment islocated,inthefirezone.7.5.3FireProtection SstemsFireZone29(A,B,E)presently hasnofixedsuppression orautomatic detection

.andcontainsonlycablesandcomponents fortheUnit1Essential ServiceWaterSystem.Thezonecontainsal-l/2in.waterhose"reel'('75't)outsidethezoneattheaccessgatetopumpenclosure."

Outsidethezoneinthescreenhouse arethree20lbPurple-Kdrychemicalandthree15lbCO2fireextinguishers.

Page7-30 7.5.4FireHazardsAnalsisTheUnit1pumpenclosure maysustainafirethatcouldbeassumedtorenderbothUnit1ESWpumpsinoperable.

Similarly, afireinthemotorcontrolcentercubiclewouldrendertheassociated Unit1strainers andvalvesinoperable.

Thewalls,floors,andceilingsofFireZone29(A,B,E)arethree-hour-thestairwaytoFireZone29Gthatisaratedexceptfor(a)performed tojustifytheseundampered ventilation ductopenings.

(FireZone29Gisdiscussed inSubsection'.7.)

commonUnit1/Unit2zonebelowthepumpcubicles, (b)thescreenmeshaccessgatesthatprovideentrancetothesezonesfromFireZone142,,and(c),.undampered ceilingventilation ductopenings.

Subsection 9.25presentstheengineering evaluation thatwasThe"motorcontrolcentersforUnit,lareseparated fromUnit2by48ft,andeachisinaseparatecubicle..

Thecables exitingtheMCCsareembeddedinconcreteandarerouteddirectlytotherespective unit'spumpcubicles.

ThepowercablefortheESWpumpsisroutedfrombelowthepumpsinFireZone29Gupthroughthefloor.Eachpumpcontainsfivegallonsoflubricating oil;however,Iabsentanyignitionsource,theoilpresentsnothreattotheESWpumpsinbothunits.Becauseofitslocation, FireZone29(A,B,E) isnotinapathnormallytraversed withtransient combustibles.

Page7-31 Notransient combustibles areallowedtobestoredinFireZones29A,29Bor29E,andfixedcombustibles amounttothesmallquantityoflubeoilforeachpump,asmallamountofplastics, andcableinsulation.

.Thetotalfixedcombustible loadingofFireZones.29A, 29Band29Eisunder20,000Btu/ftforanequivalent fireseverityof-underl5mi.nutes.

(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare6667Btu/ftand5minutes,respectively.)

Therearenospecificsectionsofthefirezonesthatcontainhighdensities ofcombustible materials.

TheUnit1ESW,system iscross-tied outsidethezonetotheUnit2ESWsystem.'herefore,

.existsfor.FireZone29(A,B,E) b:providing essential servicewater;.serviceto Unit2.alternate shutdowncapability usingUnit2ESWcomponents toUnitlwhilemaintaining 7.5.5ProosedModifications Thefirehazardsanalysisperformed revealedthatFireZone29(A,B,E) isnotincompliance withAppendixRand,asaresult,thefirezonewillbeupgradedwiththeinstallation ofan-automatic detection systemthatprovidesalarmsintheControlRoom.7.5.6Conclusion Basedonthepreviousanalysis, exemption isrequested fromrtherequirement thatafixedsuppression systembeinstalled inPage7-32 areas'where alternate shutdowncapability existsasprescribed bySectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemption aresummarized asfollows:(1)-TheUnit1andUnit2ESWsystemsarecross-tied outsidethezoneand,.therefore, alternate shutdowncapability existsforUnit1usingUnit2ESWsystems.NoUnit2.safeshutdownequipment orcablesareinthefirezone.(2)Thefirezonewillbeprovidedwithanautomatic firedetection system.('3)TheUnit1ESWpumpsareseparated fromUnit2ESWpumpsbyathree-hour-rated wall.(4)FireZone.29GistobemodifiedtopreventafireinFireZones29A,29Bor29EthatspreadsdowntheopenstairtoFireZone29Gfromaffecting bothunits'SW'systems(seeSubsections 7.7and9.25ofthisreport).\'t(5)Subsection 9;25,presents

'the.engineering evaluation

.=.performed tojustifythe,scr'eenmeshaccess"gates totheESWpumpcubiclesandtheunratedsteelplatehatch=,,intheceilingofFireZone29G.to-the.,Unit 2ESWpumpcubicles.

Subsection 9.25alsoidentifies theproposedinstallation of-rateddampersin-the,>ceiling of'theUnit2ESWpumpcubicles.

t(6)Thefixedcombustible loadingisunder20,000Btu/ftwithafireseverityofunder15minutes.f(7)Thefirezonedoesnotprovideanormallyusedpathoftransient combustibles.

(8)Modifications requiredtomeetSectionIII.G.3wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments..

Page7-33 SUMMARYEVALUATION TABLE7.5-1FIREZONES:29(A,B,E)

DESCRIPTION:

Unit1Essential ServiceWaterPumpsandMotorControlCentersEVALUATION PARAMETERS SUMMARYA.AreaDescription 1..Construction-a.Walls.North-'-Southreinforced

concrete, hourratingreinforced
concrete, hourratings"in=excessofthree-inexcessofthree-East.HWestreinforced concrete,'n excessofthree-hourratingreinforced
concrete, inexcessofthree-hourratingb.Floor-reinforced
concrete, inexcessofthree-hourratingc.Ceiling-reinforced
concrete, inexcessofthree-hourrating2.Ceilingheight-16ft5in.forFireZones29Aand29B12ft9in.forFireZone29E3..Area-826ftZonesvolume'-13,261ftVentilation

-20,000cfm6.AccessinZone-Equipment formspartialobstruction Page7-34 B.SafeShutdownEquipment'P-1E

-ESWPumplEPP-lW-ESWPump1WESWE-lEStrainerESWE-1WStrainerWMO-701-1EDischValveWMO-702-1WDischValve1PS-AMCCforpumpstraineranddischarge valve1PS-DMCCforpumpstraineranddischarge valveC.FireHazardsTypeofcombustibles inarea-Cableinsulation LubeoilPlastics2.3.Totalfixed.combustible loadingconsidered forthepurposeoftheanalysis-20,000Btu/ftActualquantityoffixedcombustibles-Cable-3,570,454 BtuLubeoil-1,461,000 BtuPlastics-475,792TOTAL-6667Btu/ftD.ExistingFireProtection 1.FireDetection Systems2.NoneFireExtinguishing Systems-Manual20lbPurple-Kdrychemicalextinguishers, outsidepumpenclosures inscreenhouse 15lbC02extinguishers, outsidepumpenclosures inscreenhouse Waterhosereelwith75ftl-l/2in.hoseandadjustable anglespraynozzlePage7-35 7.6FireZone29(C,D,F)Unit2Essential ServiceWaterPumsandMotorControlCentersEXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12'ndiana andMichiganElectricCompanyrequestsexemptions fromthespecificrequirements ofAppendixR,Section,III.G.3; i.e.,afixedfiresuppression systemshallbeinstalled inthefirearea.7.6.1AreaDescritionThisfirezoneistheUnit2equivalent ofFireZone29(A,B,E).

FireZone29(C,D,F) islocatedontheextremewestcentralsideofthescreenhouse thatisadjacenttotheTurbine.Building elevation 591ft..Thefirezoneiscomprised ofthetwopumpcubiclesforUnit2ESWpumps(PP-2EandPP-2W)eachlocatedinmissile-barriered enclosures, andaseparatecubicleforthe:motorcontrolcenters.(2PS-A and.2PS-D).Accesstothepumpsisgainedthroughthe.southsideaccess,controlgatefromthescreenhouse area.Theaccessgateisconstructed ofscreenmeshforventilation purposes.

Additional ventilation isprovidedthroughundampered ductopeningsintheceilingof29Cand29D.Theductopeningswillbeprovidedwiththree-hour-rated dampers.Subsection 9.25providesthe,engineering evaluation thatrequiresaddingdamperstotheductopenings.

Thepumpcubiclesshareacommoncorridorwithawall,separating.

thepumpsandamissileshieldperpendicular tothewallpartially enclosing thepumps.eThepumpsareinstalled onpedestals approximately fourfeetofftheground.Theeast/west Page7-36 wallseparating thisUnit2zonefromtheUnit1pumpsisthree-hour-rated.

Anopenhatchispresentinthesoutheast corneroftheeastpumproom.ThehatchprovidesaccesstoFireZone29Gthatisthelevelimmediately belowboththeUnit1andUnit2ESWpumpareas.Themotorcontrolcentersarelocatedadjacenttoeachotherinacommonenclosure withascreenmeshaccesscontroldoorprotected byamissileshieldwall.Pertinent roomdimensional dataiscontained i'nFireZone29(C,D,F)

SummaryEvaluation Table7.6-1andFigures7.6.1and7.6.2.7.6.2SafeShutdownSstemsFireZone29(C,D,F) containsbothESWpumpsforUnit2(PP-2Eand.PP-2W),thestrainers

-forboth'pumps(ESWSEandESWSW),thedischarge valvesforbothpumps(WMO-703andWMO-704')

andbothmotorcontrolcenters(2PS-Aand2PS-D)thatservethestrainers andvalves.NootherUnit2andnoUnit1safeshutdownequipment orcableislocatedinthefirezone.7.6.3FireProtection SstemsFireZone29(C,D,F) presently hasnofixedsuppression orautomatic detection andcontainsonlycablesandcomponents fortheUnit2'Essential,Service WaterSystem.Thezonecontainsal-l/2.inchwaterhosereel(75ft)outsidethezoneattheaccessdoortothepumpenclosure.

Outsidethezoneinthescreenhouse arethree20lbPurple-Kextinguishers.

drychemicalandthree15lbC02firePage7.-37 7.6.4FireHazardsAnalsisTheUnit2pumpenclosure maysustainafirethatcouldbeassumedtorenderbothUnit2ESWpumpsinoperable.

Similarly, afireintheMCCcubiclewouldrendertheassociated Unit2strainers andvalvesinoperable.

Thewalls,floors,andceilingsofFireZone29(C,D,F) arethree-hour-rated exceptfor(a)the'ladderhatchto29G(fromtheeastpumpcubicle,whichisacommonUnit1/Unit2zonebelowthepumpcubicles),

(b)thescreenmeshaccessgatesthatprovideentrancetothesezones-fromFireZone142,and(c)theundampered:ceiling ventilation

'ductopenings.

(Fir'eZone29Gisdiscussed inSubsection 7.7.)The,motorcontrol,centersforUnit2a'eseparated fromUnit"1by48.ftandeach-'isina'separate cubicle.'hecablesexitingI'theMCCsareembeddedinconcreteandarerouteddirectlytotherespective unit'spumpcubicle.ThepowercablefortheESW"'pumpsisroutedfrombelowthe.pumpsinFireZone29Gup.throughthefloor.Eachpumpcontainsfivegallonsoflubricating oil;however,absentanyignitionsource,theoilpresentsnothreattotheESW'pumpsinbothunits.Becauseofitslocation, FireZone29(C,D,F) isnotinapathnormallytraversed withtransient combustibles.

Notransient combustibles areallowedtobestored'nthefirezoneandfixedcombustibles amounttocableinsulation,

plastics, andthesmallquantityoflubeoi.lfromeach.Thetotalfixedcombustible loadingofFireZones29C,29Dand29Fisunder20,000Btu/ft,foranequivalent fireseverityofunder15minutes.(Theactualcombustible loadingandPage7-38 equivalent fireseverityexistingatthistimeare6379Btu/ftand4.8minutes,respectively.)

Therearenospecificsectionsofthefirezonesthatcontainhighdensities ofcombustible materials.

TheUnit2ESWsystemiscross-tied outsidethezonetotheUnit1ESWsystem.Therefore, alternate shutdowncapability existsforFireZone29(C,D,F) usingUnit1ESWcomponents toprovideessential servicewatertoUnit2whilemaintaining servicetoUnit1.7.6.5ProosedModif,ications Thefire-hazardsanalysisperformed revealedthatFireZone29(C,D,F) isnotincompliance withAppendixR,.andasaresultthefirezonewillbe.,upgraded

  • withfire',protection modifications.

7.6.5.1Detection SstemAnautomatic detection systemwillbeinstalled inthefirezonethatprovidesalarmsintheControlRoom.7.6.5.2LadderHatch,Anengineering evaluation hasbeenperformed justifying theexistence oftheunratedladderhatch.SeeSubsections 7.7.4and9.25.7.6.5.3Ventilation DuctsTheundampered ventilation openingsintheceilingof29Cand29Dwillbeprovidedwiththree-hour-rated dampers.pertheevaluation inSubsection 9.25.Page7-39 7.6.6"Conclusion Basedonthepreviousanalysis, anexemption isrequested fromtherequirement thatafixedsuppression systembeinstalled inareaswherealternate shutdowncapability existsasprescribed bySectionIII.G.3ofAppendixR.exemption aresummarized asfollows:'1)

TheUnit2.andUnit1ESWsystemsarecross-tied andalternate shutdowncapability existsforUnit2outsidetheareausingUnit1ESWsystems.NoUnit1safeshutdownequipment orcablesareinthefirezone.(2)Thefirezonewillbeprovidedwithafiredetection system.(3)Theunit,"2ESWpumpsareseparated fromUnit1ESWpumpsbyathree-hour-rated wall.(4)'An"engineering evaluation hasbeenperformed

.,thatconcluded thata-firewill-notpropagate throughtheunrated.ladderhatchbetweenFireZones29Gand29C(seeSubsection 9.25).(5)The.fixed..combustible'oading isunder20,000Btu/ftwithafireseverityoflessthan15minutes.(6)Thefirezonedoesnotprovideanormallyusedpathoftransient combustibles.

(7)Subsection 9.25presentstheengineering evaluation performed tojustifythescreenmeshaccessgatestotheESWpumpcubiclesandtheunratedsteelplatehatchintheceilingofFireZone29GtoFireZone29C.Subsection,'.9.25 alsoidentifies theproposedinstallation ofrateddampersintheceilingofFireZones.29C and29D.(8)Modifications requiredtomeet.Sectionill.G.3wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments.

Page7-40 SUMMARYEVALUATION TABLE7.6-1FIREZONES:29(C,D,F)

DESCRIPTION:

Unit2Essential ServiceWaterPumpsandMotmorControlCentersEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction-a.WallsNorth-reinforced

concrete, inexcessofthree-hourrating2.SouthEastWestb.Floorc.CeilingCeilingheightreinforced
concrete, inexcessofthree-hourratingreinforced concrete,'.in excessofthree-',hour.ratingreinforced
concrete, inexcessofthree-hourratingreinforced
concrete, inexcessofthree-,hourratingreinforced
concrete, inexcessofthree-hourratingE16ft5in.forFireZones29Cand29D12ft9in.forFireZohe29F3.Area-826ft4.Zonevolume-13,261ft5.Ventilation

-20,000cfm6.AccessinZone-Equipment formspartialobstruction

~Page7-41 B.SafeShutdownEquipment PP-2E-ESWPump2EPP-2W-ESWPump2WESWSE-StrainerPP-2EESWSW-StrainerPP-2WWMO-703-2EDischValveWMO-704-2WDischValve2PS-AMCCforpumpstraineranddischarge valve2PS-DMCCforpumpstraineranddischarge valveC.FireHazards2.3.Typeofcombustibles inarea-Cableinsulation LubeoilPlasticsTotalfixedcombustible loadingconsidered jor.thepurposeoftheanalysis-20,000Btu/ftActualquantityoffixedcombustibles-Cable-3,021,140 BtuLubeoil-1;461;000 BtuPlastics-786,592BtuTOTAL-6379Btu/ftD.ExistingFireProtection 2.FireDetection Systems-NoneFireExtinguishing Systems-Manual20lbPurple-Kdrychemicalextinguishers, outsideinscreenhouse 3-15'lbC02extinguishers, outsideinscreenhouse Waterhosereelwith75ft1-1/2in.hoseandadjustable anglespraynozzle'Page7-42 7.7FireZone29GScreenhouse AuxiliarMCCRoom,Elevation 575ft,BothUnitsEXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptions fromthespecificrequirements ofAppendixR,SectionIII.G.2;i.e.,anautomatic firesuppression systemshallbeinstalled inthefirearea.7.7.1AreaDescritionFireZone29Gisthebasementlevelbelowtheessential servicewaterpumpsofbothUnits1and2andcontainstwononsafeshutdownmotorcontrolcenters.The.firezonehasahatchwithaladderuptotheUnit2ESWsoutheast pumpcubicleandastairwaytothenorthwest Unit1pumpcubicle.Theceilingandwallsareallthree-hour-rated exceptfortheunratedladderhatchandtheopenstairwell.

Anengineering evaluation hasbeendonejustifying theexistence oftheunratedhatch(seeSubsection 9.25).ConduitforallfourESWpumps,theirvalvesandstrainers,

.enters.theeastwallviaembeddedconduitexceptforWMO-701(theUnit1eastpumpdischarge valve).Alltheconduitcomesthroughthewallinpullboxesat1nearceilingheightandimmediately exitsupintotheceilingslab.Thecablinginto'theceilingrunsinembeddedconduittoitsrespective pumpcubicle.Allceilingandwallpenetrations aresealed,with.three-hour-,rated fireseals.Pertinent roomdimensional dataiscontained inZone29GSummaryEvaluation Table7.7-1andFigure7.7.1.Page7-43 7.7.2SafeShutdownEuimentFireZone29Gcontainsnosafeshutdownequipment exceptcablesinconduitforthecomponents of.bothUnits1and2Essential ServiceWaterSystems.Thecablesforthefourpumpstrainers anddischarge valvesarelocatedinconduitandin.pull".boxesatceilingheight.TheconduitsenterthezonefromtheTurbineRoomfloorslabandimmediately exitthroughtheceilingslabtorespective pumpcubicles.

Exceptforoneconduit,thezoneexitpointsareallwithinthepullboxes.OneESWdischarge valve'(WMO-701) conduitrunsfromthepullboxnearthe'ceilingtothecubicleareafortheUnit1eastpump.Thefour~;pumppowercablesenterthezonethroughtheeastwallatabout~ceilingheight(beingrunintothezoneinthefloorslabofthe",Turbine

.Building)'nd areroutedneartheceilingtothe:respective pumpcubicleareawherethey'xitFireZone29G,throughtheceiling.7.7.3FireProtection SstemsFireZone29Ghasnoautomatic suppression ordetection systemsinstalled andisprovidedwiththemanualsuppression withinthezoneandsystemsavailable to29(A,B,E).

7.7.4FireHazardsAnalsisFireZone29GisacommonzoneforbothUnit1andUnit2.Theonlysafeshutdownequipment intheareaisconduitcontaining cablesfortheESWsystemsofbothunits.Thetotalfixedcombustible loadingofFireZone29Gisunder13,000Page7-44 Btu/ftforanequivalent fireseverityunder10minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare11,858Btu/ftand8.8minutes,respectively.)

Thepumppowercablesareinfourinchconduitenteringthefirezonethroughtheeastwall.Thevalvesandstrainers forallfourpumpslikewiseenterthefirezonethroughtheeastwallandimmediately exitupthroughtheceiling.Noprotection presently existsfortheconduitsofallfourpumps.Thefirezoneprovidesnopathfortransient combustibles; however,Iprotection toallc'ablingassociated withbothunits'SWsystemswillbeprovided.

There.arenospecificsectionsofthefirezonethatcontainhighdensities ofcombustible materials.

AnopenstairwayenteringfromtheUnit1WestESWpumpcubicle,FireZone29B,andaladderandahatchopenin'gfromUnit2EastESWpumpcubicle,FireZone29C,provideacommonconnection betweenUnit1and2ESWpumpsviaFireZone29G.Hotcombustible gases'rom afireinFireZone29GcouldaffecttheESWpumpsinbothunits.ThehatchopeningfromtheUnit2Eastpumpcubiclewillpreventpropagation offireeffectsintothepumparea.Anengineering evaluation hasbeenperformed thatprovidesjustification fornotcoatingthehatchbecausethiswillnotincreasethelevelofprotection presently providedinthearea.See.Subsection 9.25fortheengineering justifications.

Thehatchwillensurethathotcombustible gasesresulting fromafireinFireZone29GwillnotaffecttheUnit2ESWpumps.Page7-45 TheUnit1westpumpcubicleisprovidedwith10,000cfmofductedsupplyair.AllcablingforthesupplyfansisembeddedinconcretefromtheMCCinFireZone29Etothefanmotors,withnoneofthecablingexistinginFireZone29G.Twosupplyfansareprovidedwithonlyonerequiredaseachprovides100:oftheAirisexhausted fromthis"required airflowforthecubicle.Icubiclethroughthescreenmeshsecuritygateinthenorthwall.Duetothelowcombustible loadinginFireZone29GandthesenaturalexhaustairflowpathsoutoftheUnit1Westpumpcubicle,hotgasesorotherproductsofcombustion'rom afirein"'FireZone29Gthatwouldflowupthestairwaywillflowdirectly<<outofthecubicleandpreventtheformation ofastratified

~layerofhotgaseswithsufficient depthtodamagetheUnit1ESW-pumps.-Michigan ElectricCompanybelievesthatthepreviously proposedone-hourbarriersforall".fourtrainsachieveanequivalent or..superior leveloffireprotection forthezoneconfiguration.

Inaddition, thedesignandinstallation issuesassociated withthethree-hour racewaybarrierssuggestthatimplementation ofthatalternative isnotpreferred.

AttheNRCStaff'srequest,wehavereviewedthe,FireHazard'-"Analysis todetermine ifthree-hour racewaybarriersfortwoofthefourESWpumptrainswouldbepreferable toone-hourbarriersforallfourESWtrains.Basedonthelowin-situcombustible loadingsandalackofmajoractivityinthezone,IndianaandPage7-46 Basedontheseconsiderations, boththeeastandwesttrainsofESWforbothUnits1and2willbeprotected fromtheeffectsoffiresinFireZone29G.InthehighlyunlikelyeventthatafireinFireZone29GshouldcausefailureforbothUnit1ESW-pumps,alternate shutdowncapability forUnit1isavailable throughtheuseoftheUnit2ESWpumps.The.alternative-shutdowncapability isdescribed inSubsection 5.2.3.61Manualhosestationsareprovided'n theScreenhouse forfighti'ng firesinFireZone29G.Thehosestationsarelocatedsuchthatallportionsof,.FireZone29Gcanbecoveredwith75feetofhoseand30feetofwaterstream.,Figures7.7.2and7.7.3indicatethe,locations ofmanualhosestationsandportable.

extinguishers forfightingfiresin.FireZone29G.7.7.5-ProosedModifications

-The-fires

-hazardsanalysisperformed

.revealed thatFireZon'e.29G,isnotincompliance withAppendixRandasa'esultthezone.willbeupgradedwithfireprotection modifications.

7.7.5.1FireDetection Thefirezonewillbeprovidedwithanautomatic firedetection system.7.7.5.2HatchThehatchexitingthefirezonetotheeastpumpcubicleofUnit2wastobeprovidedwithatleastathree-hour-rated firehatchdoortoisolatetheUnit2pumproomsfromtheUnit1pumpPage,7-47 rooms(via29G).Anengineering evaluation hasbeenperformed thatprovidesjustification fornotproviding athree-hour-rated hatchsincethiswillnotincreasethelevelofprotection presently providedinthearea.engineering justifications.7..7.5.3~ConduitsSeeSubsection 9.25fortheThefollowing conduitswillbeprovidedwithone-hourfireprotection (groupedinfourpullboxes)fromtheentrytoexitpointinthefirezone:PULLBOX8626G.-18627G-18628G-l.8629G-1PULLBOX8624R-18624R-28618R-1,8619R-18620R-1PULLBOX8618R-28619R-28620R-28996R-28996R-1PULLBOX8977G-29987G-28629G-28627G-28628G-27.7.5.4'PumPowerandDischa'reValveConduitsThefollowing pumppower;=anddischarge valveconduitswillbeprovidewithone-hourprotection fromtheentrytotheexitpointofthefirezone:8004R-1(PP-1WUnit-2)8004G-1(PP-1EUnit-1)8004G-2(PP-2EUnit-2)8004R-2(PP-2WUnit-2)9232G-1(WHO-701Unit-1East)7.7.6Conclusion Basedonthepreviousanalysis, exemption isrequested fromanautomatic suppression systemasprescribed inSectionIII.G.2ofAppendixR.Thebasesthatjustifytheexemption aresummarized asfollows:Page7-48 (1)Anautomatic firedetection systemistobeprovidedforthefirezone.(2)Theconduitsofbothdivisions (allfourpumpsandassociated components) aretobeprovidedwithone-hourfireprotection.

(3)Anengineering evaluation hasbeenperformed thatconcluded thatafirewillnotpropagate throughtheunratedladderhatchbetweenFireZones29Gand29C(seeSubsection 9.25).ie)Thefixedcorn/ustible loadingofFireZone29Gisunder13,000Btu/ftwithafireseverityoflessthan10minutes.Thefirezoneisnotinanormalpathfortransporting transient combustibles.

(6)Modifications requiredtomeetSectionIII.G.2wouldnotsignificantly enhancefireprotection safetyabovethatprovided'y presentcommitments.

Page7-49 SUMMARYEVALUATION TABLE7.7-1FIREZONE:29G,DESCRIPTION:

Screenhouse Auxiliary MCCRoom,Elevation 575ft,bothunitsEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction-a.WallsNorthSouthreinforced

concrete, hourratingreinforced
concrete, hourratinginexcessofthree-inexcessofthree-East-reinforced
concrete,

.hourratinginexcessof.three-West-reinforced

concrete, in,excessofthree-hourratingb.Floor-reinforced
concrete, hourratingc.Ceiling-reinforced
concrete, hourratinginexcessof,three-inexcessofthree-2.3.Ceilingheight-,12ft5in.Area-1544ft4~Roomvolume-19,171ftVen'tilation

-0cfm6.AccessinZone-Unobstructed B.SafeShutdownEquipment NonePage7-50' C.FireHazardsTypeofcombustibles inarea-Cableinsulation Cellulosics PlasticsRubber2.3.Totalfixedcombustible loadingconsidered (orthepurposeoftheanalysis-27,000Btu/ftActualquantity.offixedcombustibles-Cable-17,285,320 BtuCellulosics

-257,238BtuPlastics"--719,065 BtuRubber-50,400BtuTOTAL-11,858Btu/ftD.ExistingFireProtection 1.FireDetection Systems-2.NoneFireExtinguishing Systems-Manual20lbPurple-Kdrychemicalextinguishers, insidethezoneandoutsidepumpenclosures inscreenhouse315lbC02extinguishers, insidethezoneandout-sidepumpenclosures inscreenhouse!waterhosereelwith75ftl-l/2in.hoseand,adjustable anglespraynozzlePage7-51 7.8FireZones33,33A,33Band105Unit1EastMainSteamValveEnclosure andContractor AccessControlBuxldinEXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptions fromthespecificrequirements ofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinstalled inthefirearea.7.8.1FireAreaDescritionFireZones33,33A,33Barelocatedimmediately outsidetheContainment BuildingofUnit'1atanelevation of612ft.The"zonesincludethenorthareaaroundcontainment thatcontainstainsteam'linesandalsoincludes-thenonessential servicewatervalvegallery'on thewest'sidedirectlyoppositetheEastMain'SteamVa'lve-Enclosure;-

ThefireareainwhichthesezonesareJ'-'1'ocated

'alsoincludesFire-Zone105,theContractors Access'ControlArea.Pertinent dimensional dataiscontained inFireZones33,33A,33Band105SummaryEvaluation Table7.8-1andFigure7.8.7.8.2SafeShutdownEuimentFireZones33,33A,33Bcontainallmainsteampressure"'transmitters forsteam.generators 1and4,theelectro-pneumatic transmitters forallfourUnit1steamgenerator poweroperatedreliefvalves,steamgenerators 1,and4auxiliary feedwater inletvalves(FM0-211, 212,241,242),thelocalshutdownindication panel(LSI-1)andthepoweroperatedreliefvalvesandsafetiesforsteamgenerators.

1and4..Themainsteamstopvalvesforsteamgenerators 1and4arealsointhearea.Page7-52 7.8.3FireProtection

.SstemsFireZones33,33A,33Bhavenoautomatic suppression system.Athermistor detection systemandmanualwaterdelugesuppression systemisinstalled forthecharcoalfilterslocatedinthearea.FireZone105isprotected byanautomatic wetpipesprinkiersystem.Theareaalsohasmanual75ftl-l/2in.hosestationandC02fireextinguishers.

7.8.4FireHazardsAnalsisAllinteriorwalls,floorsandceilingsareofreinforced concreteconstruction, withtheexception oftheunratedwall.thatseparates FireZones33Aand105.Excluding doorsandmetalbarrierstotheexteriorofthe.area,.seismicgapsbetweenContainment andFire-Zones33,.33A,and33B,.openhatchtoFireZone116below,steel,grateinthefloor'ofFireZone33toFireZone8below,numerouspenetrations ofthewallbetweenFireZone33A,andFireZone108,andanunratedwalltoFireZone105,allbarriershaveaminimumfireratingofonehour.Engineering evaluations orexemption requestshavebeenperformed orgrantedjustifying theseunratedportionsoftheareaboundaries.

(SeeSubsections 7.14,9.23,9.29,9.35and9.38.)Penetrations existbetweenFireZone33BandFireZone12andwillbesealed.Theanalysisindicated thepresenceofallfoursteamgenerator power-operated reliefvalveEPTsinthesezones.Thetransmitters aregreaterthan100ftapart;however,alternate 4Page7-53 shutdowncapabilities willexistforthisareawiththeproposedmodifications tothesteamgenerator PORVs.Thefixedcombustible loadingoftheareaisunder27,000Btu/ftforanequivalent fireseverityofunder20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare11,530Btu/ftand8.5minutes,respectively.)

2Ofthetotal,approximately 45%ofthecombustible loadingiscontained inFireZone105;thiszoneisprotected byanautomatic wetpipesprinkler system.7.8.5ProosedModifications Theonlyredundant components intheareanecessary forsafe,-shutdown aretheEPTsforthefourr"EPTsandtheirassociated'ables are'"fireaffectbothtrainsofsteamsteamgenerator PORVs.Theover100ftapart.Shouldagenerator PORVsonedivision'willbeoperable"outside,the area=atalocalcontrolstation.7.8.5.1FloorGrateThree-hour-rated damperswereprovidedforthegrateinthefloorofFireZone33toFireArea8belowbeforesubmittal oftheMarch1983AppendixRreport.7.8.5.2Penetrations Thepenetrations thatexistbetweenFireZones33and12willbesealedwithathree-hour-rated seal.7.8.5.3FireDetection Thefireareawillbeprovidedwithanautomatic firedetection systemthatwillalarmintheUnit1ControlRoom.Page7-54 I7.8e6Conclusion Basedonthepreviousanalysisanexemption isrequested fromtherequirement thatafixedsuppression systembeinstalled inareaswherealternate shutdowncapability existsasrequiredbySection'III.G.3ofAppendixR.exemption aresummarized asfollows:Thebasesthatjustifythe(2)(3)Affectedcomponents inthefireareahavealternate shutdowncapability.

Thecomponents ofconcernarehorizontally separated bygreaterthan100ft.Thefixedcorn/ustihle loadinginthefireareaisunder27,000Btu/ftwithanequivalent fireseverityoflessthan20minutes.(4)Penetrations betweenFireZone33BandFireZone12havebeensealed(seeSubsection 8.4.3).Engineering evaluations, havebeenperformed

-inSubsections 9.23,,9.29,9.35and9.38tojustifyunprotected openingstoadjacentfireareas.Anexemption

-(seeSubsection 7.14)wasrequested andgrantedforunratedseismicgapsbetweenFireZones33,33Aand33BandtheCon-tainmentstructure.

(5)Themodifications

.required tomeetSectionIII.G.3wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments.

Page7-55 SUMMARYEVALUATION TABLE7.8-1FIREZONES:33,33A,33Band105DESCRIPTION:

Unit1EastMainSteamValveEnclosure andContractor AccessControlBuildingEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction-a.WallsNorth-metalcladexteriorwallSouth,-reinforced

concrete, inexcessofthree-hourratingEast.-reinforced
concrete, inexcessofhourratingWest-reinforced
concrete, inexcessofhourratingthree-three-b.Floor-.reinforced
concrete, inexcessofthree-hourratingc.Ceiling-reinforced
concrete, inexcessofthree-hourrating2.Ceilingheight-Approx.68ftforFireZone3331ft8in.forFireZone33A24ft6in.forFireZone1058ft6in.forFireZone33B3..Area-,7236ftZonesvolume-Approx.206,5l8ft35.6.Ventilation

-FireZone33-47,750cfmFireZones33Aand33B-4000cfmFireZone105-1250cfmAccessinZone-Equipment formspartialobstruction Page7-56 SafeShutdownEquipment MPP-210,211,212,240,241,242-SGPressureTransmitters MRV-213,243-SGPowerOperatedReliefValvesSV-1,2,3,-SafetyValvesFMO211g212241I242SGSupplyMOVsLSI-1-LocalShutdownStationFireHazards2.3.Typeofcombustibles inarea-Cableinsulation CharcoalCellulosics ClassBsolventsPlasticsRubberTotalfixedcombustible loadingconsidered forthepurposeoftheanalysis-27,000Btu/ft4Actualquantityoffixedcombustibles-Cable-25,446,125 BtuCharcoal-2,145,000 BtuCellulosics

-31,019,871 BtuClassBsolvents-3,102,000 BtuPlastics-18,486,386 BtuRubber-3,259,875 BtuTOTAL-'1,533Btu/ft2ExistingFireProtection 2.FireDetection Systems-,Thermistor heatdetection forthecharcoalfilterunitFireExtinguishing Systems-ManualdelugewatersprayforthecharcoalfilterunitManualhosestationsandportableextinguishers (ABC,Purple-KandC02)available Automatic.

wetpipesprinklers inFireZone105Page7-57 7.9FireArea3434A,34B,Unit2EastMainSteamValveEnclosure EXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptions

,fromthespecificrequirements of-.Appendix R,SectionIII.G.3,i.e.,afixedfiresuppression systemshallbeinstalled inthefirearea.7.9.1FireAreaDescritionFireArea34,34A,34Bislocatedimmediately outsidetheContainment BuildingofUnit2atanelevation of612ft.ThisfireareaistheUnit,2counterpart to,FireArea33,33A,33B.Theareaincludesthesouthareaaroundcontainment thatcontainsmainsteamlines.andalso,.includes thenonessential servicewaterllvalvegallery.onthewestside'directly oppositetheEastMain1SteamValveEnclosure..

',Pertinent" dimensional dataiscontained in.Table7.9-1,FireArea34,34A,34B.Evaluation Parameters SummaryandFigure7.9.7.9.2SafeShutdownEuimentFireArea34,34A,34Bcontainsallmainsteampressure,transmitters forsteamgenerators 1and4,theelectro-pneumatic transmitters forallfourUnit2generator poweroperatedreliefvalves,steamgenerators.

1and4auxiliary feedwater inletvalves(FM0-211, 212,241,242),thelocalshutdownindication panel(LSI-1)andthepoweroperatedreliefvalvesandsafetyforsteamgenerators 1and4.Themainsteamvalvesforsteamgenerators 1and4arealsointhearea.Page7-58 7.9.3FireProtection SstemsFireArea34,34A,34Bhasnoautomatic suppression system.Athermistor detection systemandmanualwaterdelugesuppression systemisinstalled forthecharcoalfilterslocatedinthearea.Theareaalsohasamanual75ftl-l/2in.hosestationandCO2fireextinguishers.

7.9.4FireHazardsAnalsisTheinteriorwalls,floorsandceilingsareofreinforced concreteconstruction.

Excluding doorsandmetalwalltotheexteriorofthearea,theseismicgapsbetweenFireZones34,34A,34BandContainment, openhatchtoFireZone117below,steelgrateinthefloorofFireZone.34toFireZone26,andnumerouspenetrations ofthewall.'between FireZone34AandFireZone109,all.barriers havea-minimumfirelatingofonehour.Engineering evaluations orexemption requestshavebeenperformed orgrantedjustifying theseunratedportionsoftheareaboun-daries(seeSubsections 7.14and9.36).Penetrations existbetweenFireZone34BandFireZone22andwillbe'ealed.

Theanalysisindicated thepresenceofallfoursteamgenerator poweroperatedreliefvalveEPTsinthearea.Thetransmitters aregreaterthan100ftapart;however,alternate shutdowncapabilities willexistforthisareawiththeproposedmodifications tothesteamgenerator PORVs.Page7-59 Thefixedcombustible loadingoftheareaisunder20,000Btu/ftwithanequivalent fireseverityoflessthan15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare5909Btu/ftand4.3minutes,respectively.)

7.9.5ProosedModifications Theonlyredundant components intheareanecessary forsafeshutdownaretheEPTsforthefoursteamgenerator PORVs.TheEPTsandtheirassociated cablesareover100ftapart.Shouldafireaffectbothtrainsofsteamgenerator PORVs,onedivision.willbe"operable outsidetheareaatalocalcontrolstation."7.9.5..1 FloorGrateThree-hour fire-rated, damperswereprovidedforthegrateinT,",.thefloorofFireZone34.toFireZone26belowbeforesubmittal

'oftheMarch-1983 AppendixRreport.7.9.5.2Penetrations Thepenetrations thatexistbetweenFireZones34Band22willbesealed.7.9.5.3FireDetection Thefireareawillbeprovidedwithanautomatic firedetection systemthatwillalarmintheUnit.2ControlRoom.7.9.6Conclusion Basedonthepreviousanalysis, anexemption isrequested 4fromtherequirement thatafixedsuppression systembeinstalled Page7-60 inareaswherealternate shutdowncapability exists,asrequiredbySectionIII.G.3ofAppendixR.Thebasesthatjustifytheexempt-ion aresummarized asfollows:(1)Affectedcomponents inthefireareahavealternate shutdowncapability.

(2)(3)Thecomponents ofconcernarehorizontally separated bygreaterthan100ft.Thefixedcornustibleloadinginfireareaisunder20,000Btu/ftvithanequivalent fireseverityoflessthan15minutes.(4)Penetrations betweenFireZone34BandFireZone22havebeensealed(seeSubsection 8.8.3).Engineering evaluations havebeenperformed inSubsections 9.24,9.36and9.38tojustifyunprotected openingstoadjacentfireareas.Anexemption (seeSubsection

'7.14)wasrequested andgrantedforunratedseismicgapsbetweenFireZones.34,.34A,and34BandtheCon-tainmentstructure.

(5)Themodifications requiredtomeetSectionIII.G.3wouldnotsignificantly enhancefireprotection safety'boveth'atprovidedbypresentcommitments.

Page7-61 SUMMARYEVALUATION TABLE7.9-1,FIREAREA:34,34A,34BDESCRIPTION:

Unit2EastMainValveEnclosure EVALUATION PARAMETERS SUMMARYA.AreaDescription Construction a.WallsNorth-reinforced

concrete, inexcessofthree-hourratingSouthEast:metalcladexteriorwallreinforced
concrete, inexcessofthree-hourratingWest-reinforced
concrete, inexcessofthree-hourratingb.Floor-reinforced concrete',

inexcessofthree-hourratingc.Ceiling-reinforced

concrete, inexcessofthree-hourrating2.Ceilingheight-Approx.68ftforFireZone3431ft8in.forFireZone34A8ft6in.forFireZone34B3.Area-4856ft4.Areavolume-Approx.177,660ft35.Ventilation

-FireZone34-4900cfmFireZones34Aand34B-4000cfm6.AccessinZone-Equipment formspartialobstruction Page7-.62 B.SafeShutdownEquipment MPP-210,211,212,240,241,242-SGPressureTransmitters SV-l,2,3,-SafetyValvesMRV-213,243-SGPowerOperatedReliefValvesFM0-211,212,241,242-SGSupplyMOVsLSI-1-LocalShutdownStationO.C.FireHazards'1.Typeofcombustibles inarea-Cableinsulation CharcoalCellulosics ClassBsolventsPlasticsRubber2.Totalfixedcombustible.

loadingconsidered forthepurposeoftheanalysis-20,000'Btu/ft3.,'ctual quantityoffixed.combustibles-Cable-11,993,276 BtuCharcoal-2,145,000 BtuCellulosics.

-5,483,200 BtuClassBsolvents-3,102,000 BtuPlastics-2,233,550 BtuRubber-3,754,023 BtuTOTAL-5909Btu/ftD.ExistingFireProtection FireDetection Systems-Thermistor heatdetection forthecharcoalfilterunit2.FireExtinguishing Systems-ManualdelugewatersprayforthecharcoalfilterunitManualhosestationsandportableextinguishers (ABC,Purple-K, andC02)available Page7-63 7.10FireZone44SAuxiliarBuildinSouth,Elevation 609ft,BothUnitsEXEMPTIOH REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemption fromAppendixRSectionIII.G.2;i.e.,enclosure ofcableandequipment andassociated nonsafety circuitsofoneredundant traininafirebarrierhavingaone-ho'ur rating.7.10.1FireZoneDescritionFireZone44Sis"thesouthhalfofelev'ation"609't oftheAuxiliary

Building, thathas'eenartificially segmented forthepurposesofthe.analysisat..approximately 120ftfromthesouthwall.Thenorth"half ofthe-firezone(44N)"contains onlyUnit1safeshutdown"equipment,'nd

.cablesandhasalternate shutdowncapability',using Unit'2,systemsandcomponents.

FireZone44SIcontains'predominantly Unit2safeshutdowncables.However,fivecomponent coolingwaterpumps(1PP-10E 1PP-10W,2PP-lOE,2PP-10Wandthesparepumpusableforeitherunit)arelocatedintheextremesouthendofthefirezone.TheCCWpumpsaremountedonpedestals withconcretecurbscompletely surrounding t'epedestals.,

Thecurbsare"s'ixincheshighandthepedestals earefourincheshigh.TheflooraroundeachoftheCCWpumpsiscurbedinsuchamannerthatoilleakingfromanyonepumpormotorwillbeconfinedbytheboundaryofthecurbing.Thustheoilisnotallowedtopoolandflowtowardsand/ordirectlyPage7-64 aroundtheadjacentCCWpump.Ventilation supplyductsarelocatedovereachmotorthatcompletely umbrellathepumpmotors.NormalaccessintotheareaisthroughthenorthendofFireZone44N,throughtheAuxiliary Buildingaccesscontrolarea;BothUnit1andUnit2CCWpumpsarenormallyalignedtotheirrespective unitsduringfullpoweroperation'.

Thesparepumpisavailable forusewitheitherunitduringmaintenance ofoneof.thenormalpumpsbyelectrically connecting thepumpandmanuallyaligningthevalves.Thecenterlines'f eastandwestpumpmotorsforbothunitsareseparated byapproximately 13ft..TheUnit1eastandUnit2westpumpsatthemotorendbearings, (closest-points)areseparated byapproximately 5ft5in.,while-the.Unit1westpumpmotor,onadiagonal, toUnit2westpumpmotorisseparated byapproximately 16ft6'n.Thefive,CCWpumpsarealllocatedwi,thinasectionofFireZone44Sapproximately 35ftby35ft.TheUnit2CCWheatexchangers runnorthandsouthandareapproximately 12ftnorthoftheUnit1eastpumpandseparated fromeachotherbyapproximately 7ft.Theheatexchanger outletvalvesCMO-410andCMO-420arelocatedatthenorthendoftheUnit2CCWheatexchangers approximately 75ftfromthesouthwallofFireZone44S.Afour-foot wideventilation'uct runseastandwestbetweenUnit1andUnit2CCWpumpsapproximately 10ftoffthefloor.Sub'section 9.3presentstheengineering evaluation performed toPage7-65 justifytheHVACductpenetration toFireZone52above.Pertinent dimensional dataforFireZone44SisgiveninSummary'Evaluation Table7.10andFigures7.10.1,7.10.2,7.10.3,and"7.10.8.7.10.2SafeShutdownEuimentFireZone44ScontainsallfourCCWpumps.forUnits1and2,thetwoUnit2CCWheatexchangers, theCCWpumpsuctionvalves(onlyrequiredforRCPthermalsealreturntoCCWpumps),Unit2CCWheatexchanger outletvalves,Unit2CCWcommonserviceheadervalves,Unit2'ESW:toCCWheatexchanger inlet,Unit2ESW<toCCWheat;exchanger outletandUnit2MCC2-AZV-A.Thespare>'CCWpumpisalso,i:nFireZone44S.With;the..exception'f

'hecomponent coolingwaterpumps1PP-10Eand1PP-10W,thereareno,'nit1cablesorcomponents in">FireZone44Sthatareessential forsafeshutdown.

Thus,for~mostsystems,Unit1isavailable foralternate shutdowncapability.

Proposedfireprotection modifications willprovideavailability ofallfouremergency diesels,allfouressential servicewaterpumpsandatleasttwoofthefourcomponent coolingwaterpumps.Theremaining systemsofUnit1usedfor"alternate shutdowninUnit2areoutsideofthisfirezoneandfreeoffiredamage.7.10.3FireProtection SstemsFireZone44Shaspartialareaautomatic drypilotpreaction suppression systemandfullareaionization detection.

ManualPage7-.66 suppression systemsincludeten20lbABCdrychemicalandten15lbC02fi'reextinguishers; threeCO2hosereelswith150ft1in.hosesandthreewaterhosereelswith75ftl-l/2in.hoses'quippedwithadjust'able anglespraynozzles.Thefirezoneisalsoequippedwith20ionization detectors.

7.10.4FireHazardsAnalsisThefixedcombustible loadingoftheareaisunder33,000Btu/ft,foranequivalent fireseverityoflessthan25minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare19,192Btu/ftand14.2minutes,2respectively.)

Thecombustible loadingisapproximately 52<fromcableinsulation, 12<fromcellulosics, 33<.fromplasticsandrubber,and3~ClassBflammable liquidcombustibles inthefirezone.Therearenospecificareasofthe.,fire zonethatcontainhighconcentrations offixedcombustibles.

Thearrangement oftheCCWpumpsandheatexchangers ispresented inFigures7.10.1and7.10.2.Thepowercablesforthepumpsareruninconduitinthefloorslabandenterthefirezonethroughthefloorinto.thepumppedestalatthetermination pointofthemotors.Nopumpcontrolcablesarelocatedinthefirezone.The"overheadareaabovethepumpsis.essentially freeoffixedcombustibles asthecabletraysinthefirezonerunnorthandsouthtotheeastandwestofthepumps.Page7-67 Twoceilingelevations existinFireZone44S.Theclearfloortoceilingheightoverthecomponent coolingwaterpumpsis10ft11in.,withthatovertherestofthefirezonebeing20"ft4in.Figure7.10.4isaplanandelevation viewoftheceilingheightsinthevicinityofthecomponent cooling.waterpumps.Duetothechangeinceilingelevations, theproductsofcombustion fromafireinthevicinityofthepumpswouldtendtoflowupintothe20ft4in.highceilingspace.Thiswillpreventastratified layerofhotgasesfromformingto-adepthsufficient todamagethecomponent coolingwat'erpumpsunaffected

'bythedirectresultsofthefire.Openstairways.

provideaccess.fromthe591ftand633ftelevations toFireZone44Sonthe609ftelevation.

'ccessto'thecomponent coolingwater.areaofFireZone44Sisopenandunobstructed therebyensuringadequatefirebrigaderesponsefor>manualfirefightingpurposesshouldtheneedarise.7.10.5ProosedModifications Thefirehazardsanalysisrevealedthepumpsandheatexchangers withassociated components donotcomplywithAppendix-RandasaresultFireZone44Swillbeupgradedwithfireprotect.ion modifications.

~.7.10.5.1 WaterSuressionSstemTheentirefirezonewillbeprotected byextending theexistingautomatic drypilotpreaction watersuppression system.ThesystemwasextendedinFireZone44StoprovideareacoveragePage7-68 overthebearings, Units1and2CCWpumps,directlyovertheCCWpumpandoverthemonitortankarea.Thegeneraldesigncriteriafortheinstallation isasfollows:(2)(3)Thesprinkler headsshallbepositioned insuchamannerthattheywilladequately controland/orextinguish afirethatcouldoriginate ontheflooroftheprotected areaandcauseanexposuretoconduits, pipingand/orequipment requiredforsafeshutdown.

Thedesignofthesprinkler systemshouldconsiderthefiretoinvolvetransient combustible andexternalignitionsourcesandnotbecausedbyelectrically originated firesinoverloaded cables.Suppression willconsistbfceiling-mounted sprinklers inaddition, to.sprinklers locatedfordirectwaterapplication ontotheCCWpumpbearings.

Theceiling-mountedsprinklers provide,.

area-coverageovertheCCWpumpsandpillprovideadesigndensityontheorderof0.4gpm/ft.RefertoFigures7.10.5and7.10.6forplanandelevation viewsof"thedrypilotpreaction suppression system'fortheCCWpump"area.(4)'hesprinkler systemsshall,-besupported

'seismically.

wherenecessary andanalyzed-forinadvertent operation oractuation.

~'l,I(5)Thesprinkler systemsshallbeapplicable portionsofNFPA13-1978.designedtothe.(6)(7)Heatcollectors, whereapplicable, shallbeinstalled toassurereliablesprinkler actuation.

Safety-related equipment isrequiredtobeprotected frominadvertent sprinkler operation thatcouldrenderequipment inoperable duetowaterspray.Drainagecapability inthevicinityofthepumpsconsistsofdrainopeningsoneachofthefivepumppedestals andagridof4-inchdiameterdrainscoveringtheentirefloorareaofFireZone44S.Adequatecapacityisprovidedfordrainageofsuppression waterresulting fromafireinthiszone.Page7-69 7.10.5.2FireBarrierAfirebarrierofsteelconstruction coatedwithasubliming materialwillbeprovidedbetweentheUnit1andUnit2pumps.ThisbarrierwillbelocatedbeneaththeexistingHVACductworktoapproximately 6ft6in.ThebarrierwillalsoextendnorthbetweentheUnit1eastpump'ndthesparepump.(SeeFigure7,.10.3.)

.Figures7.10.7and.7;10.8aredraftplanandelevation views.oftheproposedbarrier.Thebarrierwillbeseismically qualified andconstructed oftwoapproximately 3/4-in.thickTSIThermolag panels,oneoneithersideof1/4--in.expandedmetal.The.TSIpanelswillbeoverlapped toprovideprotection forthebpltsattaching.the.

panelsto'themetalstuds(seeFigure7,.10.9).

7..10.5.3 FireDetection, The,area.willbeprovidedwith"expanded coverageofboththeautomatic drypilotdetection'.,

systemassociated withthepreaction sprinkler systemand.thearea,ionization detection system.Thedrypilotdetection willconsistofpilotsprinkler heads(whichfunctionasheatdetectors) locatedovertheCCWpumpsandthroughout thenormallyaccessible areasofthefirezone..RefertoFigures7.10.5and7.10.6forplanandelevation viewsofthedrypilotpreaction suppression systemfortheCCW.pumparea.Additional ionization detectors willbeprovidedintheareaoftheCCWpumps.Page7-70~

7.5.5.Subsection 9.3presentstheengineering evaluation performed tojustifytheHVACductworkthatiscommontoallfiveCCWpumps.Pertheresultsofthatevaluation, athree-hour-rated firedamperwillbeprovidedatthetopoftheverticalportionoftheHVACductwhereitpenetrates into.FireZone52above.Subsection 7.13presentstheexemption requestjustifying undampered HVACductspenetrating throughfloorandceilingslabsofFireZone44S.7.10.6Conclusion

.,-"Basedontheprevious.analysis,-

exemption isrequested fromtherequirement thatcablesand.equipment ofoneredundant trainbeenclosedinafirebarrierhavinga"one-hour'ating asprescribed bySectionIII.G.2ofAppendix, R."Thebasesthat'-justifytheexemption aresummarized asfollows:(1)AfirebarrierwillbeplacedbetweentheUnit1and'.Unit2CCWpumpsandbetweenthesparepumpandthe.Unit1eastpump.Thusmodified, twoofthefouroperational pumpswillbefreeoffiredamage.(2)Theexistingautomatic suppression systemwillbeextendedtoprovidecoverageofallCCWpumps.(3)Additional automatic detection willbeprovidedfortheCCWpumparea.(4)CCWpumpcablesareinembeddedconduitwiththeexception oftheconnecting pigtailatthemotor.(5)Notraystraversetheareaofthepumps.Thefir@zone'asacombustible loadingofunder33,000Btu/ft4withafireseverityoflessthan25minutes.(6)Thelubeoilinthepumpshasnocredibleignitionsource.Page7-71 (7)Subsection 9.3presentstheengineering evaluation performed tojustifythecommonHVACductworkrunningfromFireZone52downtoFireZone44Swhereitisdistributed overallfiveCCNpumps.Pertheresultsofthatevaluation, athree-hour-rated firedamperwillbeprovidedatthetopoftheHVACshaftwhereitpenetrates intoFireZone52.(8)Subsection 7.13presentstheexemption requestjustifying undampered HVACductspenetrating throughfloorandceilingslabsofFireZone44S.(9)Themodifications

-requiredtomeetSectionIII.G.2wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments.

Page7-72 SUMMARYEVALUATION TABLE7.10-1FIREZONE:44SDESCRIPTION:

Auxiliary BuildingSouth,Elevation 609ft,BothUnitsEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction-a.WallsNorth-artificial boundary; mowallSouth-reinforced

concrete, inexcessofthree-hourratingEast-reinforced
concrete, inexcesshourratingofthree-West-reinforced
concrete, hourratingb.Floor-reinforced
concrete, hourratinginexcess,ofthree-inexcessofthree-2.3.4~5.6.c.Ceiling-reinforced
concrete, inexcessofthree-'our ratingCeilingheight-Variesfrom12ftto20ft4in.Area-9360ft2Zonevolume-159,391ftVentilation

-38,000cfmAccessinZone-Unobstructed B.SafeShutdownEquipment PP-10E,PP-10W-Units1&2CCWPumps(4)CMQ-413,CMO-411-Units1&2CCWPumpSuctionVa'ivesHE-l5E,HE-15W-CCWHXInletValves,Unit2Page=7-73 SafeShutdownEquipment (continued)

CM0-410,CMO-420,-CCWHXOutletValves,Unit2CM0-415,CMO-416-CCWCommonServiceHeaderValves,Unit2WMO-732,WMO-736-ESWtoCCWHX,InletValve,Unit2WM0-734,WMO-738-ESWtoCCWHX,OutletValve,Unit2MCC-2-AZV-A

-Unit2FireHazardsTypeofcombustibles inarea-Cableinsulation LubeoilCellulosics ClassBsolventsPlasticsRubber2.3.Totalfixedcombustible loadingconsidered forthepurposeoftheanalysis-33,000Btu/ftActualquantityoffixedcombustibles-Cable-92,.796,061.Bt.uLubeoil-3,652,500 BtuCellulosics

-21,927,000 BtuClass.Bsolvents-3,102,000 BtuPlastics-36,914,052-BtuRubber-21,266,600 BtuTOTAL-19,192Btu/ftExistingFireProtection FireDetection Systems-20ionization smokedetectors 2.FireExtinguishing Systems-Drypilotpreaction sprinklers overCCWpumps,pumpbearings, monitortanks,andnormallyaccessible zonelocations'age 7-74 7.11FireArea53Unit1ControlRoomEXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemption fromthespecificrequirements ofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinstalled inthearea.7.11.1FireAreaDescritionFireArea53istheUnit1ControlRoomlocatedonelevation 633ftimmediately adjacenttotheUnit2ControlRoom.TheUnit1ControlRoomcontainsallthenormalcontrolpanelsforplantoperation andmostrelayandinstrument cabinetsassociated withplantcontrol.Inaddition,'he Unit2hotshutdownpanel(FireZone145)islocatedin.the.southwest, corneroftheControlRoomandisapproximately 12ft6in..long,by5ft1in.wide.Thetopofthepanelisapproximately eightinchesfrom thefalseceilingoftheControlRoom.ThehotshutdownpanelisofsteelM'construction withasteeldooratthefrontofthepanel.Pertinent dimensional dataiscontained inFireArea53SummaryEvaluation Table7.11-1andFigure7.11.7.11.2SafeShutdownEuimentTheUnit1ControlRoomcontainsthecontrolpanels,relay'andinstrument cabinetsand'associated cablingforUnitl.TheUnit2hotshutdownpanelisalsointheControlRoom.Page7-75

.7.11.3FireProtection SstemsFireArea53hasnoautomatic suppression system.Thereare46ionization detectors locatedintheControlRoomincluding detection inandaroundHSD2andabovethesuspended ceiling.LocatedoutsidetheControlRoom,aretwol-l/2in.waterhosereels(75'fteach).withadjustable

'spraynozzles.InsidetheControlRoomaresix15lbCO2fireextinguishers andoneBioPacone-hourbreathing apparatus.

TwoC02hosereels(100ftand150't)arelocatedoutsidethefirearea.7.11.4FireHazardsAnalsisThehotshutdownpanel.isasteelenclosure withsteeldoorsacrossthefrontof.thepanel..Noequipment-internaltothepanel-isexposedtothe'directeffects'fanypostulated roomfaireduringnormaloperation becauseofthe-normally closed'panel door.;SeeFigure7.11.for.a,sketch-ofthepanels.TheUni't2hotshutdownpanelislocated-inthe,sectionoftheUnit1ControlRoomthathousesnumerousothercontrol,relayandinstrument panelsforUnit1.TheControlRoomareaisprotected fromotherfirezonesbythree-hour-rated floors,ceilingsandwallsexceptforoneunratedceilinghatchandonefloorhatchthatis.unrated..

Also,thecommonconnecting doorbetweentheControlRoomsisunrated.Twoseparateengineering evaluations havebeendonejustifying theexistingunratedhatchesintheceilingandfloor.SeeSubsections 9.5and9.13,respectively, fortheseevaluations.

Thecommonconnecting doorbetweenControlRoomswillbeupgradedtothreehours.TheHSD2panelPage7-76 wasoriginally, installed tocomplywiththerequirements of10CFR50GDC19andisusedto-provideshutdownfromoutsidetheControlRoomforDesignRfires.Basisconsiderations otherthanAppendixThefixedcombustible loadingfortheentireControlRoomisandequivalent fireBtu/ftand21.2severityexistingatthistimeare28,225minutes,respectively.)

TheareaneartheUnit2hotshutdownpanelhasfewexposed,cables.as.thecablesenterandexittheunder47,000Btu/ft.foranequivalent fireseverityofunder35tlminutes.(Theactualcombustible loadingpanelsintheareapredominantly through4penetrations.

Thus,thereisa:smallcombustibles intheareaof,theHSD2.thefloorviasealedquantity offixed1.With'-theexception of,small.quantities, of.organic'solvent'sed to.service, theequipment.

inthe-room,"notransient Ccombustibles arestored,routed.=throughorusedinthissection~oftheControlRoom.Thislowvolumeoffixedcombustibles combinedwiththeminimumvolumeoftransient combustibles usedintheareacreatesanextremely lowfirehazard.IntheeventofafireintheUnit.lMainControlRoom,theunitcanbesafelyshutdownfromUnit2bytheuseofthe~alternate safeshutdownmethod.7.11.5ProosedModifications Thefirehazardsanalysisperformed revealedthattheUnit1-ControlRoomisnotincompliance withAppendixR.Apostulated-Page7-77 fireintheUnit1ControlRoommayinvolvebothUnit1systemsandcomponents andtheUnit2HSDpanelthatwouldaffectUnit2systemsandcomponents.

Additional fireprotection featureswillbeprovidedtoensurethatfiresexternaltotheHSD2paneldonotdamageinternalwiring,and firesinternaltothepaneldonotspreadoutside.7,',.11.5.1 FloorandCeilinHatchesEngineering evaluations havebeenperformed justifying theexistence oftheunratedhatchesinthefloorandceilingoftheUnit1ControlRoom,Fire.:Area53.(See'Subsections-9;"5"and'9.13.)7.*.11.5.2,,Connect inDoor"Upgradethecommonconnecting doortoathree-hour rating.S7;:11.5.3, HotShutdownPanelThehotshutdownpanelwillbeprovidedwith'afire"ba'rrier

'avinga'nequivalence ofathree-hour firerating.Theconstruction ofthebarrierwillbesuchthataccesstothepanelwillnotbeimpeded;however,thebarrierwillfunctiontopreventfiredamagetoandfromtheHSD2panel.7.11.6Conclusion Basedonthepreviousanalysis, anexemption isrequested fromtherequirement thatafixedsuppression systembeinstalled inareaswherealternate shutdowncapability existsasprescribed inSectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemption aresummarized asfollows:Page7-78 (1)Automatic detection ispresentintheareaoftheUnit2HSDpanelandinsidethepaneltoensureearlyIwarningofafireinornearthepanel.(2)Thehotshutdownpanelwillbeprovidedwiththeequivalent ofathree-hour firebarrier.(3)TheControlRoomiscontinuously mannedandhasportablefireprotection available.

(4)Thefixedcombustibje loadingoftheControlRoomisunder47,000Btu/ftforanequivalent fireseverityoflessthan35minutes.Thefixedcombustible loadingintheareaneartheHSD2islow.(5)Theamountoftransient combustibles allowedintheControlRoomisextremely lowandwillbecontrolled.

(6)Theunit.has,,alternate

.safeshutdowncapability fromUnit2.(7)Subsections 9.5and9.13presenttheengineering evaluations performed

.tonjustifytheunrated.hatchesinthefloorandceilingofFireZone53.(8)The.connecting doorbetweenthe.Unit.1and.Unit 2ControlRoomswill,beupgradedto,athree-hour-rated.

firedoor.,'t(9)Installation ofa,fixedsuppression systemtomeet,.SectionIII..G.3, wouldnotenhancefire'protection-safetyabovethatprovidedbypresentcommitments.

Page7-79 SUMMARYEVALUATION TABLE7.11-1FIREZONE:53DESCRIPTION:

Unit1ControlRoomEVALUATION PARAMETERS SUMMARYA..AreaDescription Construction-a.Walls-INorthSouthreinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoamireinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoam'ast.-reinforced'oncrete orblock;three-hour rating;openingssealed'withsiliconefoam,'estreinforced

'concrete orblock;three-hour.

rating;openingssealedwithsiliconefoamb.Floorreinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoam2.3.4.5.6.c.Ceiling-reinforced concreteorblockthree-hour rating;openingssealedwithsiliconefoamJCeilingheight-15I,ft7in.Area-4410ft2(Roomvolume-66,150ftVentilation

-13,000cfm(normal)19,000cfm(emergency)

AccessinZone-Unobstructed Page7-80 B.SafeShutdownEquipment AllControlPanelsandmostRelayCabinetsforUnit1C.FireHazards1.Typeofcombustibles inarea-Cableinsulation Cellulosics PlasticsRubber2.Totalfixedcombustible loadingconsidered forthepurposeoftheanalysis-47,000Btu/ft43.Actualquantityoffixedcombustibles Cable-38,534,338 BtuCellulosics

-53,359,547,Btu Plastics-30,154,925 Btu-.,Rubber'-'.-2,435,040 BtuTOTAL-28,225Btu/ftD.ExistingFireProtection 2.FireDetection Systems-45ionization detectors FireExtinguishing Systems-Manual6152215lbC02extinguishers BioPacbreathing apparatus inControlRoomBioPacsoutsideinTurbineBuildingCO2hosereels,100ftand150ftwaterhosereelseachwith75ft1-1/2in.hoseandadjustable nozzlesPage7-81 7.12FireArea54Unit2ControlRoomEXEMPTION REQUESTPertheprovisions of10CFR50.48(c)(6) and10CFR50.12IndianaandMichiganElectricCompanyrequests"exemption fromthespecificrequirements ofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppression systemshallbeinthearea.7.12.1FireAreaDescritionFireArea54inUnit2isequivalent toFireArea53inUnit1.FireArea54istheUnit2ControlRoomlocatedonelevation 633ftimmediately adjacenttotheControlRoom.TheUnit2ControlRoomcontainsall'henormalcontrolpanelsfor1.~plantoperation'nd mostrelayinstrument cabinetsassociated withplantcontrol.Inaddition, theUnit.lhotshutdownpanelr(FireZone144)islocatedinthenorthwest corneroftheControl7MRoomandisapproximately,"12 ft6in.longby5ft1in.wide.Thetopofthepanelisapproximately eightinchesfromthefalseUceilingoftheControlRoom.Thehotshutdownpanelisofsteelconstruction withasteeldooratthefrontofthepanel.Pertinent dimensional dataiscontained inFireArea54SummaryEvaluation Table7.12-1andFigure7.12.e7.12.2SafeShutdownEuimentTheUnit2ControlRoomcontainsthecontrolpanels,relayandinstrument cabinetsandassociated panelingforUnit2.TheUnit1hotshutdownpanelisalsointheControlRoom.Page7-82 7.12.3FireProtection.S stems~~FireZone54hasnoautomatic suppression system.Thereare42ionization detectors locatedintheControlRoomincluding detection inandaroundtheHSD1andabovethesuspended ceiling.LocatedoutsidetheControlRoomaretwo1-ll2in.waterhosereels(75fteach)withadjustable,'spray nozzles.InsidetheControlRoomaresix15lbCO2fireextinguishers andone"BioPac"one-hourbreathing apparatus.

TwoCO2hosereels(100ftand150ft)arealsolocatedoutsidethefirezone.7.12.4FireHazardsAnalsis'hehotshutdownpanelisasteelenclosure withsteeldoorsacrossthefrontofthepanel.'oequipment internaltothepanelisexposedtothedirect',effects ofanypostulated roomfireduringnormaloperation becauseofthenormally.

closedpaneldoor.SeeFigure7.12forasketchofthepanels.The'Unit 2hotshutdownpanelislocated"in.thesectionoftheUnit2ControlRoomthathousesnumerousothercontrol,relayandinstrument panelsforUnit2.TheControlRoomareaisprotected fromotherfirezonesbythree-hour-rated floors,ceilingsandwallsexceptfor(a)oneunratedceilinghatch,(b)oneunratedfloorhatch,'(c)oneundampered ventilation duct,and(d)theunratedcommonconnecting doorbetweentheControlRooms.Three'separateengineering evaluations havebeendonejustifying theexistingunratedhatchconfigurations intheceilingandfloor,Page7-83 andtheundampered ventilation duct.SeeSubsections 9.5,9.17and9.2,respectively, for"'hese evaluations.

Thecommonconnecting doorbetweenControlRoomswillbeupgradedtothreehours.TheHSDlpanelwasoriginally installed tocomplywiththerequirements of10CFR50GDC19andisusedtoprovideshutdown, from.outside.'he

"Control RoomforDesignBasisconsiderations otherthan"Appendix Rfires.Thefixedcombustible loadingfortheentireControlRoomisunder47,000Btu/ftforanequivalent fireseverityofunder35minutes.(Theactualcombustible loadingand-'equ'iva'lent"'fi're' sever,ity existingatthis..timeare30;069Btu/ft'and22.6Aminutes,respectively.)

The'reanearthe.Unit1hotshutdownpanelhasfewexposedcables.asthecablesenterandexitthepanels,intheareapredominantly'hrough thefloorvia'ealed penetrations.

.',Thus,there's.asmallquantityoffixedcombustibles intheareaoftheHSD1.Piththeexception ofsmallquantities,.of organicsolventusedtoservicetheequipment intheroom,notransient combustibles arestored,routedthroughorusedinthissectionoftheControlRoom.Thislowvolumeoffixedcombustibles combinedwiththeminimumvolumeoftransient combustibles usedintheareacreateanextremely lowareafirehazard.IntheeventofafireintheUnit2MainControlRoom,theunitcanbesafelyshutdownfromUnit1bytheuseofthe'alternate safeshutdownmethod.Page7-84 7.12.5ProosedModifications

~~~The,firehazardsanalysisperformed revealedthattheUnit2ControlRoomisnotincompliance withAppendixR.Apostulated fireintheUnit2ControlRoommayinvolvebothUnit2systemsandcomponents andtheUnit1HSDpanel.Additional fireprotection featureswillbeprovidedto.ensurethatfires'xternal to.theHSDldonotdamageinternalwiringandfiresinternaltothepaneldonotspreadoutside.7.12.5.1FloorandCeilinHatchesEngineering evaluations have,beenperformed justifying theexistence oftheunratedhatchesinthefloorandceilingoftheUnit2ControlRoom,Fire.Area54.(SeeSubsections 9.5and.9.17.)~~~7.12.5.2Connectin DoorUpgradethecommonconnecting doortoathree-hour rating.7.12.5.3Ventilation DuctAnengineering evaluation hasbeenperformed justifying theexistence oftheundampered ventilation ductbetweentheControlRoomandFireZone73.SeeSubsection 9.2forthisevaluation.

7.12.5.4HotShutdownPanelThehotshutdownpa'nelwillbeprovidedwithafirebarrier,.

havinganequivalence ofathree-hour firerating.The.construction ofthebarrierwillbesuch.,thataccesstothepanelwillnotbeimpededhowever,thebarrierwillfunctiontopreventfiredamagetoandfromtheHSDlpanel.Page7-85 7.12.6Conclusion Basedonthepreviousanalysis, anexemption isrequested fromtherequirement thatafixedsuppression systembeinstalled inareaswherealternate

shutdown, capability existsasprescribed inSectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemption are'ummarized as'follows:

(1)Automatic detection, ispresentintheareaoftheUn'it1HSDpanelandinsidethepaneltoensureearlywarningofafireinornearthepanel.(2)Thehotshutdownpanelwillbeprovidedwithafirebarrierhavingtheequivalence ofathree-hour firerating.(3)TheControl.Roomiscontinuously mannedandhasportablefireprotection available.

(4)'hefixedcombustib/4

'oading'ftheControlRoomisunder47,000Btu/ftforanequivalent fireseverityoflessthan35minutes..'.The fixedcombustible-loading "in,.theareaneartheHSD1islow.I(5)'The:amount-of*'ransient

.combustibles allowedinthe".Control, Roomisextremely lowandwillbecontrolled.

(6)Theunithasalternate safeshutdowncapability fromUnitl.(7)Subsections 9.5,9.17,and9.2presenttheengineering evaluations performed tojustifytheunratedfloorandceilinghatchesandtheundampered ventilation ductthroughtheceiling.(8)Theconnecting doorbetweentheUnit1-andUnit2ControlRoomswil.l,beupgradedtoathree-hour-rated firedoor.(9).Installation, offixedsuppression systemstomeetSectionIII.G.3wouldnotenhancefireprotection safetyabovethatprovidedbypresentcommitments.

Page7-86 SUMMARYEVALUATION TABLE7.12-1FIREZONE:54DESCRIPTION:

Unit2ControlRoomEVALUATION PARAMETERS SUMMARYA.AreaDescription Construction-

'a.WallsNorth-reinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoamSouth.-reinforced concreteorblock;three-'hour rating;openingssealedwithsiliconefoamEast..-,reinforced, concreteorblock;.three-hour, rating;.-openings sealed,with:silicone foamWestQjjjreinforced concreteorblock;three-hour; rating;openings.

sealedwithsiliconefoamb..Floor-reinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoamc.Ceiling-reinforced concreteorblock;three-hour rating;openingssealedwithsiliconefoam2.3.5.6.Ceilingheight-15ft7in.Area-4410ft2Roomvolume-66,150ft3Ventilation

-13,000cfm(normal)19,000cfm(emergency)

AccessinZone-Unobstructed Page7-87 B.SafeShutdownEquipment AllControlPanelsandmostRelayCabinetsforUnit2C.FireHazards1.Typeofcombustibles inarea-Cableinsulation

-Cellulosics Plastics,Rubber2.Totalfixedcombustible loadingconsidered forthepurposeoftheanalysis-47,000Btu/ft~3.Actualquantityoffixedcombustibles-Cable-54,843,131 BtuCellulosics

-50,875,516 BtuJJPlastics--26;294,425 BtuIJI*.Rubber-596,400Btuj'ITOTAL-30,069Btu/ft2D.ExistingFireProtection 4T1.FireDetection Systems2.41ionization detectors FireExtinguishing Systems-Manual62215lbCO2extinguishers CO2hosereels,100ftand150ft,outsideroomwaterhosereelseachwith75ft1-1/2in.hoseandadjustable spray.nozzlesBioPacone-hourbreathing apparatus inControlRoomBioPacsoutsideinTurbineBuildingPage7-88

-7.13AuxiliarBuildinHVACDuctPenetrations EXEMPTION REQUESTPertheprovisions of10CFR50.48and10CFR50.12IndianaandMichiganElectr'ic Companyrequestsexemption from.therequirements ofAppendixR;i.e.,fire-rated dampersshallbeinstalled inthefireareaboundaries.

Thisanalysishasbeencompleted toprovidetechnical justification fornotinstalling firedampersintheventilation systemductpenetrations thatcommunicate betweenfireareasvertically fromelevation toelevation.

Theventilation ductsassociated withthe22penetrations werelocatedonHVACdrawingsshowingtheentire,flowpathofeachduct.,Penetrations intozones/areas equippedwithrated:firedamperswereeliminated andwhatremainedisdepictedon.Figures7..13-1through7.13-8.,Theregisters inthe.remaining ducts'werelocatedwiththedirection ofthearrowsoneachdefining'hetheritissupply(~g)orexhaust(PPt).Eachfigurerepresents theelevations oftheAuxiliary Buildingshowingbothunits.Thecirclednumbers-onthefiguresrepresent firezones/areas foundandthenumbersnexttothearrowsindicatetheregisternumberfoundincorresponding Tables'.13-1through7.13-6.Onlythefirezones/areas containing theductingofconcernarerepresented onthefigures.Thefiguresareletter-coded toidentifythefirefareainvolvedanddefinedattheboundaries withtheuniquemarkings.

Fordetailedboundaries ofeachfireareaorzoneandPage7-89 Jspecificgeneralarrangement

drawings, refertoSection2,Figures2.1through2.11of'thisreport.Figures7.13-1through7.13-8aremeanttoindicatethepresenceoftheductorregisterinafirezone/area andnottoprovidespecificlocations withinthezone/area.

Tables7.13-1through7.13-6identifythespecific.

American.

ElectricPowerServiceCorporation HVACdrawingnumberanddrawingcoordinates-to locatetheregisters.

The22ductpenetrations andassociated registers wereevaluated individually asdepictedonthefigures.Theregisters withinazone/area wereevaluat'ed withrespectto'-safe<

shutdown'omponent andcircuitlocations..

TheMarch1983submittal considered fire'amage to""safeshutdown"systems,'omponents'.and ci-rcuits, withinareasand,zones..'.

Thissameinformat-ion"will beutilized.

as.,appropriate

=to'.resolve

'ssues'rising>fr'omtheregister.locations withina.'firezone/area.'he generalapproachwasto1)-consider the.effectonSectionIII.G.2compliance; i.e.,evaluatethedamagetoredundant safe..shutdown equipment and/orcircuits, and2)considertheeffectonSectionIII.G.3;i.e.,evaluatedamagetoalternate shutdownequipment and/orci,rcuits.

Thus,whereanindividual ductcommunicated withdifferent zonesor.areas,theductpenetrations andregisters wereevaluated todetermine theimpactonthetwocases'just described.

Both'asesconsiderarea/zone communication betweenelevations andatthefirearea/zone boundaries wheretheductpenetration wasnotprovidedwithafiredamper.TheimpactofPage7-90 ductsandregisters onsafeshutdownalsoconsiders thelocationofsuppression anddetection systems,theamountofcombustible materialinthezone/area, andparticularly theprovidedmethodofsafe.shutdown asdescribed intheMarch1983submittal.

Thestairways communicating betweenelevations havebeenprovidedwith'automatic suppression

,systems-tomaintainelevations asseparatefireareas.Themechanical andelectrical ceiling/floor penetrations arebeingprovidedwithsealsinaccordance withtheMarch1983submittal.

Thecombustible.;

loadingvaluesandsurfaceareaspresented aregivenfortheentirefirearea..Plantwalkdowns havebeenperformed.

andphysicalraceway=locationdrawingshavebeerrevaluated todetermine thatthe.combustible loadinginthefire'reas evaluated isuniformly.

distributed throughthe'area.'ire areascontaining concentrated

.combustibles will,bespecifically discussed intheevaluation ofthearea.Evaluation ofFiure7.13-1Theexhaustductrepresented onthisfigureisdesignedtoremovewarmairfromvariousareasofUnit1anddischarges totheairshaftatthenorthendofFireZone44.Thisfigureshowstwoductpenetrations (30in.x26in.and72in.x30~in.).Thefollowing summarytablesfeaturesandsafeshutdowncompliance providethefireprotection<

methodsforthezones/areas'f concern.Page7-91 oFireprotection featuresIIFireArea/Zone IIl.IIII(,I6Nl).Detection Ionization

.Detectors Ionization Detectors Automatic Preaction Sprinkler I'IISuppression IAutomatic Suppressionl SysteminStairwayonly6MIonization Detectors Automatic Preaction Sprinkler 44NIIonization Detectors IIAutomatic Preaction Sprinkler oSafeshutdowncompliance methodsIFireArea/Zone I'ompliance, MethodsUf4Cablesrequiredforsafeshutdownarebeingprovided, withfirewrapping.

II.I6M6NOnedivisionofredundant safeshutdowncablesforeachunitisbeingprovidedwithfirewrapping.

Modifications arebeingimplemented toprovidealternative shutdowncapability.

I44NIIModifications arebeingimplemented toprovidealternative shutdowncapability.

Page7-92 AsshowninFigure7.13-1,theairshaftextendsuptothe633ftelevation wheretheexhaustfans,creatinganegativepressureintheairshaft,expelthewarmairtotheatmosphere.

FireZone1,onthe573ftelevation, isaportionofFireAreaAthatalsocontainsFireZoneslAthrough1H,136,137,138A,138B,and138C.Thesafeshutdowncomponents withinthisarea(RHRpumpsandassociated, cables)willbeprotected fromfireasdefinedintheMarch1983submittal.

Theventilation ductregisters inthisarea,asshownonFigure7.13-1,arelocatedwithin"thenorthsectionofFireZone1,whichonlycontainsR8Rpumpcables.ThecableswithinFireZone1requiredforsafeshutdown(RHRpumppowercables)arebeingprovidedwithfirewrappingandthuswouldnotbe.affected

,by.hot.gasesor.than15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare4079Btu/ftand2.9minutes,respectively.)

Theareaalsocontainsautomatic detection.

withineachfirezone.Themechanical andelectrical combustion productsfromtheventilation registers inthisfirezone.Inaddition,,the fireareahasafixedcombustible loading'f under20,000Btu/ftwithanequivalent fireseverityofless,penetrations throughtheceilingtothe587ftelevation aresealedincluding the30in.x26in.ventilation ductexitingFireZone1intoFireZone6N.FireZone6Ncontainstheductpenetrating frombelowasshowninFigure7.13-1.FireZone6Nonthe587ftelevation isPage7-93 aportionofFireAreaB,whichalsocontainsFireZones6A,6M,6S,5,61,64A,64B,65Aand'5B;FireZone6Ncontainsmotorcontrolcentersaswellasvariousredundant safeshutdownsystemcomponent cablesforUnit1.However,FireZone6N,asdescribed intheMarch1983submittal, willbeprovidedwithalternate shutdowncapability..

Thezoneisalsoequippedwithautomatic Isuppression anddetection (enhanced sinceMarch1983submittal).

FireAreaBhasafixedcombustible loadingofunder27,000Btu/ftwithanequivalent fireseverityoflessthan20minutes.(Theactualcombustible

-loadingandequiva'lent

-fireseverity-existingatthistimeare8947Btu/ftand6.5minutes,respectively.)

Theautomatic suppression systemforFireAreaBcontains.

approximately 168'sprinkler

.heads.'thatprovide'coverage forapproximately'23,600 ft.',Five'ofthesprinkler heads'are located':within

'.a'.,tenfoot'ylindrical radius'of-theductpenetration through;the,floor,andadditional sprinklers arelocatedinthevicinityoftheregisters andremaining ductwork.Thefireareaalsocontainsapproximately 36ionization typedetectors.

Theregisters intheareawiththeexception ofregister5arealllocatedinthenorthsection(FireZone6N).Register5islocatedinfireZone6M,whichcontainsredundant-safeshutdowncircuitsand.thathasbeenprovidedwithfirewrappingprotection ofoneredundant divisionforeachunitasidescribed intheMarch1983submittal.

FireZone6Misalsoprovidedwithautomatic suppression anddetection.

ThesesystemsPage7-94 inconcertwithinstalled firewrappingprovideadequateprotection fromhotgasesandcombustion productspotentially transmitted throughtheventilation system.FireZone6Nisprovidedwithsealsinthemechanical

'andelectrical ceilingpenetrations tothe609ftelevation, including theventilation ductex'itingintoFireZone44N.FireZone44N,locatedonthe609ftelevation, isapartoftheFireAreaC,whichalsocontainsFireZones43,44S,44Athrough44H,and37.Fi'reZone44Ncontainsmotorcontrolcentersandvarious~redundant cablesofsystemsrequiredforsafeshutdown.

Asindicated onFigure7.13-1,alltheregisters arelocatedinthenorthend.Thelargeduct(72in'.x30in.)pene-'rating thefloorfromthe-587.ftelevation hasse'ven'sprinkler headsat-the609ftelevation, withinaten-footcylindrical" radiusofthepenetration.

In,total,FireAreaC,hasafixed~combustible loadingofunder47,000Btu/ft'withanequivalent'ire severityof.35minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare34,482Btu/ftand25.8minutes,respectively.)

FireAreaCcontainsapproxi-mately240,sprinkler headscoveringanareaofapproximately 26,261ft.Theareaalsocontainsapproximately 30ionization 2typedetectors.

Adequatecoveragefortheductandtheregisters isprovidedbythesefireprotection devicestoensureadequate'rotection fromhotgasesandcombustible productspotentially transmitted through'theventilation system.Inaddition, FirePage7-95 Zone44Nwillbeprovidedwithalternate shutdowncapability.

Asindicated inTable5-2inSection5oftheMarch1983submittal, bothFireZones6Nand44Nhave.thesamesystemsandcomponents potentially affected.

Thusthecommunication ofthetwozonesdoesnotaffectthecompliance strategynorthesafeshutdowncapability.

Evaluation ofFiure7.13-2Figure7.13-2hasasimilarductconfiguration asFigure7.13-1,butrepresents Unit2.Thisfigurerepresents twoductpenetrations (25in.x"28in."and36in.x24in.).Thefollow-ingsummarytablesprovidethefireprotection featuresandsafeshutdowncompliance, methodsforthezones/areas ofconcern.o'ireprotection featuresI"I..FireArea/Zone

,III...I'IIIIIIIIIIIDetection Ionization, Detectors Ionization Detectors Ionization Detectors Ionization Detectors Suppression Automatic Suppressionl intheStairwayonlyAutomatic Preaction Sprinkler Automatic Preaction Sprinkler'utomatic Preaction Sprinkler Page7-96 oSafeshutdowncompliance methodsFireArea/Zone Compliance MethodsCablesrequiredforsafeshutdownarebeingprovidedwithfirewrapping.

Modifications

.arebeing:implemented toprovidealternative shutdowncapability.

6MOnedivisionofredundant safeshutdowncablesforeachunitisbeingprovidedwithfirewrapping.

44SModifications arebeingimplemented toIprovidealternative shutdowncapability.

IThefirezonesarelocatedwithinthefireareaspreviously

~,described intheFigure,7.13-1,.evaluation, so,.combustible-1loadingsandfireseverities arethesame.'he 573ftelevation VisthesameastheUnit1side,including thecableandcomponent Wconfiguration.

TheHUACsystemconfiguration onthe587ftelevation

  • 'is'si'milar toUnit1.FireZone6Swillbeprovidedwithalternate shutdowncapability andcompliance inFireZone6Misdescribed intheFigure7.13-1evaluation.

Thepenetration throughthefloortothe587ftelevation withinFireZone6Shasonesprinkler headtoprovidewatersuppression intheimmediate vicinityoftheverticalrun.Thepenetration areaofthe36in.x24in.ductisprotected byfoursprinkler headsinFireZone44Swithinatenfootcylindrical Page7-97 radiusoftheducttopreventductrelatedfiredamage.Also,FireZone44Swillbeprovidedwithalternate shutdowncapability withtheexception ofthecomponent coolingwaterpumpsthat,asdescribed intheMarch1983submittal',

areprotected toensureEltheavailability ofatleasttwoCCNpumpsforsafeshutdown.

1Evaluation ofFiure7.13-3-*,Figure7.13-3hasa.similarconfiguration asFigure7.13-2,but,thisfigurerepresents asingleductwithtwopenetrations (each44in.x24in.).Thefollowing summarytablesprovidethefireprotection featuresandsafeshutdowncompliance methodsforthezones/areas ofconcern.,

o..Fireprotection featuresII,,FireArea/Zone I",Detection,.

Suppression" 46SIonization.

Detectors Automatic Preaction Sprinkler 44$52Ionization Detectors Ionization Detectors Automatic Preaction Spr"i"nk1erIIIAutomatic Preaction ISprinkler IIPage7-98 oSafeshutdowncompliance methodsFireArea/Zone Compliance Methods6S'odifications arebeingimplemented toprovidealternative.

shutdowncapability.

.Modifications

.arebeingimplemented toprovidealternative-shutdown capability.

Modifications

'arebeingimplemented toprovidealternative shutdowncapability.

II~IIIIIITheductispartofthesupplyventilation systemcomingfromthe633ftelevation downtotheindicated'n Figure7.13-3,;oneregis587ftelevation.

As,IIter,isonthe'87-ft~,

7.13-3evaluation forthiszone.Thepenetration intheceilingofFireZone6Sisprotected bytwosprinkler headslocatedin'he587'ftelevation withinatenfootcylindrical radiusoftheductpenetration.

TheductfromthefloortotheceilingwithinFireZone44Siscontinuous withnoregisteropenings.

Additional protection isprovidedbyatleastfivesprinkler headsintheimmediate vicinityoftheductinFireZone44S.Theductpenetrating intothe633ftelevation hasaregisteropeninginthesouthendofFireZone52,whichispartofFireAreaD.Thepenetration throughthefloorintoFireZone52has.elevation

.inFireZone6S.,",'Theshutdownmethod,;fireprotection featuresandcombustible loading.are,-described in.theFigurePage7-99 sixsprinkler headswithinaten-footcylindrical radiusoftheduct.FireZone52hasalternate shutdownprovisions forthemainsteamsystemlocatedoutsideFireAreaD,whileallothersafeshutdownsystemswithinFireAreaDhaveatleastoneredundant trainlocatedoutsidethearea.Coldshutdownsystemsrequiremanualoperation of"valves, thatarealso,locatedoutsideofthearea.FireAreaDhasafixedcombustible loadingofunder47,000Btu/ftwithanequivalent fireseverityoflessthan35minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare30",778Btu/ftand23'inutes, respectively.).

FireArea.Disequippedwithautomatic firesuppression "anddetection

'.and'contains approximately 222sprinkler headsinFireZone'2andapproximately 87sprinkler headsinFireZone51.Fire.AreaDhas39'ionization detectors, including 17'in'ireZone52.'hecharcoalfilterunitsinFireAreaDareeachprotected byamanualdelugesystem.A$'Ithermistor circuitineachcharcoalfilterunitprovidesalarmannunciation initsassociated ControlRoom.Evaluation ofFiure7.13-4Figure7.13-4represents oneductpenetration (30in.x24-l':in.)andissimilartoFigures7.13-2and7.13-3.Theexhaustductshowncommunicates withFireZones6Sand44S,andisductedtotheairshaftintheextremesouthendofFireZone44S.TheductinFireZone6Shasregisteropenings, butiscontinuous withnoregisteropeningswithinFireZone44SandisadjacenttoPage7-100 theductdescribed inFigure7.13-3.Thesprinkler headarrangement isidentical forboththeductslocatedatFireZone44SasshowninFigures.7.13-3and7.13-4;therefore, theevaluation performed inFigure7.13-3appliestoFigure7.13-4.Forfireprotection featuresandsafeshutdowncapability compliance methods,"referto',the'sectionconcerni'ng FireAreas/Zones 6Sand44S.Evaluation ofFiure7.13-5Figure7.13-5represents twoductpenetrations ofthesamesize(52in.x24i'".)that.communicate withFireZones6Nand44N.Thefollowing summarytablesprovidethefireprotection featuresandsafe.shutdown compliance methodsforthezones/areas;.

ofconcern.o-Fireprotection featuresFireArea/Zone Detection Suppression Ionization Detectors Automatic Preaction Sprinkler Ionization Detectors Automatic Preaction Sprinkler Page7-101 oSafeshutdowncompliance methodsFireArea/Zone Compliance Methods6NModifications arebeingimplemented toprovidealternative shutdowncapability.

44NModifications arebeingimplemented toprovidealternative shutdowncapability.

Theexplanation ofsafeshutdown, fireprotection

features, andcombustible loadingsarecontained intheevaluation ofFigure7.13-1.Theductsshownareparalleltoeachother.Thepenetrations throughtheceilingofFireZone6Nareprotected bytwosprinkler headswithin-.a.16footcylindrical radius,oftheducts.Theseducts,as,showninFigure'7.13-5, arecontinuous inFireZone44Nwith'noregisteropenings.

Addition'al protection oftheductpenetration isprovidedbytwosprinkler headseachoverthepenetration fromFireZone44Nintothesupply-air plenum.IEvaluation ofFiure7.13-6Figure7.13-6represents oneductpenetration (34in.x30in.).Theduct,asindicated onFigure7.13-6,enterstheauxiliary cablevaultinUnit2thatisequippedwitharatedfiredamper.Theductcontinues fromtheauxiliary cablevaulttoFireZone52thatisalsoequippedwithafiredamper.Forfireprotection featuresandsafeshutdowncapability compliance methodsrefertotheprevioussectionconcerning FireZones6S,Page7-102 44Sand52.Theductpenetration atthe609ftelevation isprotected bythepresenceofthreesprinkler headswithina10-ftcylindrical radiusontheGSsideandtwoonthe44Sside.Evaluation ofFiures7.13-7and7.13-8Figures7.13-7and7.13-8represent atotalof12,ductpenetrations (four45in.x35in.,two40in.x40in.,two36in.x36in.,two22in.x34in.andtwo28in.x34in.),withUnit2beingamirrorimageofUnit1andeachunitcontaining sixductpenetrations.

The'ollowing summarytablesprovidethefireprotection featuresandsafeshutdowncompliance methodsforthezones/areas ofconcern.oFireprotection featuresFireArea/Zone Detection

.Suppression tIIIonization detectors andThermistors foxcharcoalfilterunitI'utomatic del'ugeforIcharcoalfilterunitI50Ionization detectors andThermistors forcharcoalfilterunitAutomatic delugeforcharcoalfilterunit69Ionization detectors andThermistors forHVACunitsAutomatic delugeforcharcoalfilterunitI'"IIIPage7-103 oSafeshutdowncompliance methodsFireArea/Zone Compliance Methods.Atleastoneredundant divisionofsafeshutdowncablesislocatedoutsidethefirearea50Atleastoneredundant divisionofsafeshutdowncablesislocatedoutsidethefirearea69including Thelocations containnosafeshutdowntheHVACvesti-Isystems,components orcables.bulesontheI650fteleva-II>tionlI'tThereare'noregisters.

oropenings, intheducts.shownonFigures7.13-7and7.13-8;however,they'docommunicate fromFireAreaDinZones49',(Unit1)and50(Unit.2)toFireZone69including theHVACvestibules" atthe650ftelevation.

Fire+rZones49and50,aspartofFireAreaD,havebeenanalyzed'forsafeshutdownwiththe,SectionIII.G.2compliance methodspresented intheMarch1983submittal.

FireZone69,including theHVACvestibules onthe650ftelevation andtheareainwhichpPtheyarecontained, hasnosafeshutdownequipment orcircuitslocatedinthem.FireAreasDandEwerecombinedforthepurposesofthisanalysis.

BecauseFireAreaEhasafixedcombustible loadingofunder20,000Btu'/ftwithanequivalent fireseverityoflessthan15minutes(theactualcombustible Page7-104 loadingandequivalent fireseverityexistingatthistimeare2998Btu/ftand2.2minutes,'esp'ectively) andcontainsnosafeshutdowncomponents orcircuits, thecombination oftheseareasdoesnotchangethemethodofsafeshutdownforFireAreaD.Conclusions forVentilation DuctPenetration Evaluation Thisanalysishas-beencompleted to,providetechnical 1justification fornotinstalling firedampersintheventilation'ystem ductpenetrations thatcommunicate betweenfireareasvertically fromelevation toelevation.

.Thefireprotection

features, e.g.,suppression anddetection systemsand/orthelowcombustible loadingswithintheseareas,provideadequateassurance thatfiredamagerelatedtoventilation ductingwill'Snotimpairsafeshutdowncapability.

Themajoremphasis, however,shouldbeplacedonthe.methodofcompliance andsafeshutdownforeachofthefirezones/areas involved.

'Thecenterlinefirezonesonthe587ftand609ftelevations willbeprovidedwithfirewrappingforsafeshutdowncircuits.

Thenorthandsouthportionsofbothelevations arebeingmodifiedtoprovidealternate safeshutdowncapability.

Elevations 587,609and633havebeenmodifiedtoprovideadditional automatic suppression coverage.

Also,theregisters betweenandwithini,elevations havebeenevaluated anddetermined nottocommunicate betweenredundant safeshutdowncomponents orcircuits.

Page7-105 Asinglefirestartinginoneofthefireareasofconcernthatiscommunicating through'vertical undampered ductswould*notaffectsafeshutdowncapability.

Thetechnical basesforthisanalysesissummarized below:(1)Existingsuppression systemsinareas/zones thatareprovidedwithautomatic suppression systemswillextinguish the'ostulated fireandfirewillnotpropagate outsideofthearea/zone.

(2)Combustible loadingcontained inthefireareas/zones ofconcernisunder47,000Btu/ft(3)Infireareas/zones thatarenotprovidedwithautomatic suppression systems,therequiredsafeshutdown'omponents an'd/orcablesarebeingprotected.

(4)Afirestartingin.anareacouldbeassumedtopropagate

'otheadjacentareathroughverticalundampered ductpenetrations.

However,safeshutdownoutsideoftheseareasstillcanbeachievedusingtheunaffected tr'ain.or alternate'afe shutdownmethod.Inconclusion, thisanalysisverifiesthatthe.s'afe shutdownsystemrequirements relativetotheguidelines

'ofAppendixRarebeingmetandtheexemption frominstallation offiredampersintheventilation ductsisjustified.

Inaddition, thisexemption requesthasnoimpactontheexemption requestscontained inSubsections 7.2and7.10ofthisreport.Page7-106 TABLE7.13-1AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATES DRAWINGNUMBER1012131415ReactorCoolantDrainTankPumpPipeTunnelDrainTankandPumpSumpPumpRoomReactorCoolantFilterUnit1ValveOperating GalleryBoricAcidEvaporating RoomSealWaterInjection AreaPipewayGasDecayTankRoomTunnel,Elevation 601ftVolumeControlTankConcentrate HoldingTankWasteGasCompressor RoomConcentrate HoldingTankWL-5.38WofWL-MWL-4.58EofWL-LWL-5.58WL-MWL-3.68WL-KWL-48WL-KWL-4.58WofWL-MWL-4.58WL-MWL-4.68WofWL-LWL-58WofWL-LWL-58EofWL-LWL-5.28WL-KWL-4.4WL-5.28EofWLK8WL-KWL-4.58WofWL-MWL-4.78,WofWL-M12-5713-4 12-5713-4 12-5713-4 12-5713-4 12-5715-10 12-5715-10 12-5715-10 12-5715-10 12-5715-1012-5715-10 12-5715-10 12-5717-7 12-5717-7 12-5717-7 12-5717-7 Page1of1 TABLE7.13-2AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATES DRAWINGNUMBER1012PipeTunnelReactorCoolantDrainTankSumpPump8TankPipewaySealWaterIn)ection FiltersReactorCoolant/Seal WaterFilterMonitorTankAreaMonitorTankAreaMonitorTankAreaMonitorTankAreaVolumnControlTankAreaSealWaterHeatExchanger AreaWL-7.58,WL-MWl-7.3aWL-MWL-78WL-MWL-8&WL-MWL-8aWL-MWL-6.4WL-8.4wL-8aWL-7.68WL-MaWL-MWL-MaWL-MWL-7.38WL-MWL-78EofWL-MWL-78EofWL-M12-5713-4 12-5713-4 12-5713.-4 12-5715-10 12-5715-10 12-5715-10 12-5717-7 12-5717-7 12-5717-712-5717-7 12-5717-7 12-5717-7 Page1of1

TABLE7.13-3AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATES DRAWINGNUMBERBehindMCCEsonElevation 587WL"88,EofWL-MElevation 633ftUnit2Side..WL-8.28WofWL-M12-5715-10 12-5719-7 Page1of1 C,y TABLE7.13-4AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATE DRAWINGNUMBERValveGalleryPipeTunnelGasDecayTankRoomBoricAcidEvaporator ValveOperating GalleryWL-78WofWL-LWL-78WofWL-LWL-B8WL-KWL-8.58WL-K12-5715-10 12-5715-10 12-5715-10 12-5715-10 Page1of1

TABLE7.13-5AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATES DRAWINGNUMBERCVCSFacilityCVCSFacilityWL-4.4EWL-LWI.-4.48WL-L12-5715-10 12-5715-10 Page1of1

TABLE7.13-6AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATES DRAWINGNUMBERMonitorPumpsWL-88WL-L12-5715-10 Page1of.1 0hP 7.14Containment BuildinSeismicGasEXEMPTION REQUESTPertheprovisions of10CFR50.48and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemption fromtherequirements ofAppendixR;i.e.,fire-rated sealsshallbeinstalled intheseismicgappenetrations aroundtheContainment Buildings.

AseismicgapexistsaroundtheContainment Buildingofeachunitthatprovidesanopeningofapproximately 6inchesbetweentheContainment Buildingandthewalls,ceilingsandfloorsofthestructures immediately adjacenttocontainment.

TheMarch1983submittal didnotaddresstheseismicgapwhenfireareaboundaries weredefined.Thus,thisevaluation hasbeenperformed toconfirm.thattheseseismicgapsinthefireboundaries donotaffectsafeshutdowncapability.

Thefireareasandzonesadjacenttotheperimeter ofcontainment thatcontainseismicgapsarethefollowing:

FireAreasasPresented byTable7.14-1-1FireAreaDescritionElevation 8101138Quadrant1CableTunnelQuadrant4CableTunnelQuadrant3MCableTunnelQuadrant3SCableTunnelQuadrant2CableTunnel596ft596ft596ft596ft612ftPage7-107 FireAreasasPresented byTable7.14-1-2FireAreaDescxitionElevation 23<<'426'739QuadrantQuadrantQuadrantQuadrantQuadrant3NCableTunnel3MCableTunnel4CableTunnel1CableTunnel2CableTunnel596ft596ft596ft596ft612ftFireAreas/Zones asPresented byTable7.14-2-1FireArea/Zone33B12i,4969'.:108DescritionNESWValveAreaQuadrant2PipingTunnelHVACVestibule Auxiliary BuildingHestSteamValveEnclosure Elevation 612't596ft633ft650ft612ftFire.Areas/Zones asPresented byTable7.14-2-2FireArea/"Zone34B<<225069109DescritionNESWValveAreaQuadrant2PipingTunnelHVACVestibule Auxiliaxy BuildingNestSteamValveEnclosure Elevation 612ft596'ft633ft650ft612ftTheMarch1983'ubmittal, theprimarysourceofinformation forthis.analysis, containsadditional information onthefireareaandzonedescriptions.

Theattachedtables(7.14-1-1, 7.14-1-2, 7.14-2-1, 7.14-2-2) provideasummaryoftheevaluations performed ontheareasorzonesaffectedbyseismicgaps.Page7-108 Thegeneralmethodology usedwastoevaluatethearea/zone ofconcerninconcertwiththead'jacent areas/zones ontheleft,right,andimmediately above.Thenewareadefinedbythismethod(seismicgapevaluation area)wasanalyzedtodetermine theimpactonsafeshutdowncomponents andcircuits.

Fourfireareas,aspreviously definedintheMarch.1983submittal, containmultiplezoneswithintheareaandarepartofthisanalysis.

Theseismicgapevaluation areasonlyconsiders thezoneorareaimmediately adjacenttothepostulated firearea.Thisconfiguration assumestheseismicgapwillallowcommunicat.ion betweenadjacentareasorzones.Duetodistance, lowcombustible loading,locationof.combustibles and/orpresenceof:detection andsuppression systemstheaffectof'thefirewillnotinvolveallareasandzonesthatcommunicate byseismicgaps.FireZones33and33Awerenotconsidered "withintheseismicgapevaluation astheyareonlyadjacenttoeachotherandFire"Zone33B.FireZones33,33Aand33Bwereevaluated asoneareaintheMarch1983submittal.

FireZone33Bisconsidered inthisevaluation andincludesFireZone33Aaspartoftheseismicgapevaluation area.Themirrorimagezones(34,34A,34B)inUnit24wereconsidered inasimilarmanner.Thecommunication between>FireZones49and50isthroughFireZone52separated byover~150feet.FireZone51isadjacentto52.FireZones49(Unit')and50(Unit2)aretheonlyzoneswithintheareathat"containseismicgapsatthecontainment wall.Thecommunication Page7-109 betweenFireZones49and50withinthisareawasevaluated intheMarch1983submittal.

'ireZone52isprovidedwithautomatic suppression anddetection andthusprovidesadequateassurance thateitherafireorrelatedcombustion productswouldbecontained withinFireZone49(thesameconfiguration existsforFireZone50)..Thefireareacontaining zones3,32,36,69,and48containnosafeshutdownequipment andcouldhavebeenincludedintoalargerareabuttominimizethesizeoffireareasthesefirezonesareconsidered asonearea.Thecompliance strat'egies (i.e.,safeshutdownmethod)for'achareaorzonearemaintained andusedthroughout theevaluation whiletaking'into.accountadditional considerations suchas:(1).Distancebetweenfire.zones/areas

.'.*(2).Locationofcombustibles (3)Combustible loading(4)Detection andsuppression systemsEvaluation ofTables7.14-1-1and7.14-1-2Fivepreviously definedfireareasineachunithaveautomatic C02suppression anddetection systemsinthearea.Theseareasarelistedin,Tables7.14-1-1and7.14-1-2.

Thewalls,floors,andceilingsofthetenareas(including bothunits)areconstructed toatleastal-l/2-hour firerating.Asealintheseismicgapsprovidesabarrierforcontaining thePage7-110 gaseoussuppression system.Thesealisaffixedtoboththe.containment wallandthefloor,ceilingorwalloftheperimeter buildings.

Thesealismadeofglassfiberreinforced siliconesheetingandisafireretardant material.

Afireoriginating withintheareascontaining automatic suppression wouldstayconfinedtothatareaandbeextinguished bytheautomatic suppression system.Thus,eachofthesetenareaswasevaluated asanisolatedareabasedontheassumption thatthefirewithintheareascontaining suppression systemswouldbecontained andextinguished inthearea.Evaluation ofTables7.14-2-1and7.14-2-2Evaluations ofareasorzonesthat,werenotequippedwithtautomatic suppression systemsconsidered thesealdamagedinadjacentareas/zones (left,rightandabove),'including those"containing automatic suppression.

Eachnewlydefinedevaluation areawasanalyzedonasafeshutdownsystembasiswiththeresultspresented inthesystemevaluation columninTables7.14-2-1and7.14-2-2.

Theareasand/orzonesofconcernthatdonothaveautomatic suppression systemshavelowcombustible loadingsandwithintheimmediate vicinityoftheseismicgapsaregenerally voidofexposedfixedcombustibles.

Thezones/areas ofconcernarepresented inTables7.14-2-1.

and7.14-2-2.

Excluding theareascontaining automatic'uppression fromthepostulated firelocation, thefollowing combinations ofareas/zones areevaluated:

Page7-111 Unit1Postulated FireLocations andAssociated Zones/Ar'eas l.2.3.4~5.33Bwith33A,38and10812with7,ll,33Band3849with69and10869with108108with49and69Unit2Postulated FireLocations andAssociated Zones/Areas l.2.3.4~5.34Bwith34A,39and10922with27,23,34Band3950with69and10969with109109with50and69Tables7.14-2-1and7.14-2-2presenttheresultsofthesystemevaluation foreachpostulated firelocation.

Conclusion forContainment SeismicGaEvaluation Thisseismicgapevaluation showsthesafe"shutdowncapability for'.C.CookNuclear.Plant'Units.1and2)hasnotbeencompromised asaresult-',of

.seismicgaps.'heanalysisperformed andtheresultspresented "inthetablesindicate, onasystembasis,thecapability tosafelyshutdownbothunitswhenconsidering firedamageto,safeshutdowncomponents andcircuitscontained intheseismicgapevaluation areas.Themethodofanalysisisconservative whenconsidering thefirehazardsinvolvedinthevicinityoftheseismicgaps.Thatis,itisnotanticipated thatthe.evaluated areaswouldbeaffectedtotheextentthatfirewouldpropagate throughtheseismicgapsandcausedamagethroughout theevaluation area.Combustion productswouldlikelyentertheadjacentareasorzones;however,damagetosafeshutdowncomponents andcircuitswouldlikelynotoccur.Page7-112 Inanyevent,theanalysiscontained hereinassumesthedamagetosafeshutdowncomponents andcircuitsintheseismicgapevaluation areadidoccurandverifiesthatsafeshutdowncapability ismaintained.

Inaddition, thisexemption requesthasnoimpactontheexemption requestscontained inSubsections 7.8,7.9,or7.13ofthisreport.Page7-113 I'g*

TABLE7.14-1-1UNIT1FIREAREAS/ZONES PROTECTED BYAUTOMATIC C02SUPPRESSION FIREAREA~COMBUSTIBLE LOADINQ(BTU/FT)(FT))EQUIVALENT FIRESEVERITY(MIN)++SUPPRESSION DETECTION COMMENT116,629960100(88)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILL-NOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.30,8412,05035(23.1)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEM'WILL EXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.10104,25080090(78.3)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.26,34484030(19.7)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.3841,2882,65045(31)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWI[.LEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.ENFIREAREASASDEFINEDINSAFESHUTDOWNCAPABILITY ASSESSMENT OFMARCH1983SUBMITTAL iiFIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF1 0TABLE7.14-1-2UNIT2FIREAREAS/ZONES PROTECTED BYAUTOMATIC C02SUPPRESSION FIREAREA'~COMBUSTIBLE LOADING.(BTU/FT)ARE(FT))EQUIVALENT FIRESEVERITY(MIN)+~SUPPRESSION DETECTION COMMENT2785s009lo056-75(63C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.2621,0862,74625(15.9)C02AUTOMATIC IONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.2478,08380070(58.7)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPL'IANCE METHODSSTILLAPPLY.2328,71684035(21.5)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONE.ANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.3930,6222,66735(23)C02AUTOMATIC IONIZATION ANDINFRAREDTYPESEXISTINGAUTOMATIC C02SUPPRESSION SYSTEMWILLEXTINGUISH ANYPOSTULATED FIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATE OUTSIDEOFTHEAREA/ZONE THROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITY COMPLIANCE METHODSSTILLAPPLY.CFIREAREASASDEFINEDINSAFESHUTDOWNCAPABILITY ASSESSMENT OFMARCH1983SUBMITTAL 44FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF1

~'JIi%

SEISMICGAPEVALUATION AREATABLE7.14-2-1UNIT1FIREAREAS/ZONES OFCONCERNPOSTULATED

,FIRELOCATION3384'DJACENT AREA/ZONE OFCONCERN33A+38108COMBUSTIBLE LOADINQ(BTU/FT)2369,12941,28810,187(FT3)6003,2162,650897EQUIVALENT FIRESEVERITY(MIN)++A100.220(6.7)45(31)20(7.6)SUPPRESSION NONEMANUALDELUGEFORCHARCOALFILTERAUTOMATIC C02NONE'ETECTION NONETHERMISTOR FORCHARCOALFILTERUNITIONIZATION ANDINFRAREDTYPESNONESYSTEMEVALUATION FIREZONES33Bo33As38'08AND49ARECOMBINED, ASONEAREAFORTHISSYSTEMEVALUATION.

THESAFESHUTDOWNSYSTEMSAVAILABILITY ISPRESENTED BELOW:1.MS-INSTRUMENTATION ASSOCIATED WITHSTEAMGENERATORS 1AND4ISAVAILABLE INCONJUNCTION WITHMANUALOPERATION OFASSOCIATED MRVsOUTSIDEOFTHEEVALUATION AREA.2.AF-TWOOUTOFTHREETRAINSOFTHEAFSYSTEMSARELOCATEDOUTSIDETHEEVALUATION AREA;THUS,STEAMGENERATORS 1AND4CANBESUPPLIEDWITH-AUXILIARY FEEDWATER.

3~RCSThANDTcNORMALINDICATIONS AREAFFECTED'UT ALTERNATIVE INDICATIONCAPABILITY ISBEINGPROVIDEDASPRESENTED INMARCH1983SUBMITTAL.

ATLEASTONETRAINOFOTHERRCSPROCESSMONITORING SYSTEMCOMPONENTS ISLOCATEDOUTSIDEOFTHEEVALUATION AREA.4.CVCS-THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTTHECABLEASSOCIATED WITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.

5.THEFOLLOWING SYSTEMSHAVENOCOMPONENTS ORCIRCUITSINTHEEVALUATION AREA:;oESSENTIAL SERVICEWATER(ESW)oCOMPONENT COOLINGWATER(CCW)oEMERGENCY POWERSYSTEM(EPS)oRESIDUALHEATREMOVAL(RHR)*FIREZONES33,33AAND338ARECONTAINED INAFIREAREAFORWHICHTHECOMBUSTIBLE LOADINGIS11,530BTU/FT,AREAIS7,236FTANDEQUIVALENT FIRESEVERITYIS8.5MINUTES4%FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF4 TABLE7.14-2ontinued)SEISMICGAPEVALUATION AREAADJACENTPOSTULATED

.AREA/ZONE FIRE'FLOCATIONCONCERNCOMBUSTIBLE LOADINQ(BTU/FT)(FT))EQUIVALENT FIRESEVERITY(MIN)~+SUPPRESSION DETECTION SYSTEMEVALUATION 1233B*381,722116,62926,34423641,2887,81215(1.2)84030(19.7)60010(0.2)2,65045(31)960100(87.5)NONEAUTOMATIC C02AUTOMATIC C02NONEAUTOMATIC C02/INONEIONIZATION ANDINFRAREDTYPESIONIZATION ANDINFRAREDTYPESNONEIONIZATION ANDINFRAREDTYPESFIREZONECOMBINEDEVALUATIO AVAILABIL 1.MS2.AF3.RCS4.CVCS-5.EPS6.RHRS12,7,11,338AND38AREASONEAREAFORTHISSYSTEMN.THESAFESHUTDOWNSYSTEMSITYISPRESENTED BELOW:ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTS ANDCIRCUITSASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA.ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTS ANDCIRCUITSOFTHISSYSTEMASSOCIATED WITHTHESAMEUNAFFECTED MSTRAINARELOCATEDOUTSIDEOFTHEEVALUATION AREA.ThANDTcNORMALINDICATIONS AREAFFECTED, BUTALTERNATIVE INDI-CATIONCAPABILITY ISBEINGPROVIDEDASPRESENTED INMARCH1983SUBMITTAL.

ATLEASTONETRAINOFOTHERSAFESHUTDOWNPROCESSMONITORING SYSTEMCOMPONENTS ARELOCATEDOUTSIDEOFTHEEVALUATION AREA.THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.

ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTS ANDCIRCUITSOFTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA.THEELSCLOCATEDINTHEAREA,WHICHCOULDBEAFFECTED, SUPPLIESPOWERTOTHEAFFECTEDTRAINOFSAFESHUTDOWNINSTRUMENTATION DISCUSSED ABOVE.MANUALOPERATION OFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATION AREA,ISAVAILABLE.

(THISFIREAREAISCONTINUED ONTHENEXTPAGE)@FIREZONES33,33AAND33BARECONTAINED INAFIREAREAFORWHICHTHECOMBUSTIBLE LOADINGIS11,530BTU/FTAREAIS7,236FT2ANDEQUIVALENT FIRESEVERITYIS8.5MINUTES4'i'FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE2OF4 t'Q7~n TABLE7.14-2"continued)SEISMICGAPEVALUATION AREAPOSTULATED FIRELOCATIONADJACENTAREA/ZONE COMBUSTIBLE OfLOADINGCONCERN(BTU/FT)(FT5)EQUIVALENT FIRESEVERITY(MIN)~'iSUPPRESSION DETECTION SYSTEMEVALUATION 12(cont.)7.THEFOLLOWING SAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATION AREA:oESWoCCW496986,7252,9983,20075(65.2)17,91415(2.2)MANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITIONIZATION ANDTHERMISTOR FORCHARCOALFILTERIONIZATION AND'HERMISTORS FORHVACUNITSFIREZONES49,69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION REGARDING SAFESHUTDOWN, CAPABILITY ASSESSMENT.

FIREZONES49AND69CONTAINNOSAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITS.

THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSLOCATEDINTHIS;EVALUATION AREAARETHECOMPONENTS ANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOMPLIANCE METHODISPRESENTED IN1983SUBMITTAL.

10810,18789720(7.6)NONENONE1082,99810,18717,91415(2.2)89720(7.6)MANUALDELUGEFORHVACUNITNONEIONIZATION ANDTHERMISTORS FORHVACUNITSNONEFIREZONES69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION REGARDING SAFESHUTDOWNCAPABILITY ASSESSMENT.

FIREZONE69CONTAINSNO-SAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITS.

THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSLOCATEDINTHISEVALUATION AREAARETHECOMPONENTS ANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOM-'LIANCEMETHODISPRESENTED IN1983SUBMITTAL.

44FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE3OF4 SMCAP1iTABLE7.14"2continued)

OVALATPOSTULATED FIRELOCATIONONAREAADJACENTAREA/ZONE OFCONCERNCOMBUSTIBLE LOADIN/ARE/(BTU/FTc)

(FTc)EQUIVALENT FIRESEVERITY(MIN)<<~SUPPRESSION DETECTION SYSTEMEVALUATION 108496910,18786,7252,99889720(7.6)3,20075(65.2)17o91415(2')NONEMANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITNONEIONIZATION ANDTHERMISTOR

'FORCHARCOALFILTERIONIZATION

~ANDTHERMISTORSFORHVACUNITSFIREZONES49,69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION REGARDING SAFESHUTDOWNCAPABILITY ASSESSMENT.

FIREZONES49AND69CONTAINNOSAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITS.

THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSLOCATEDINTHISEVALUATION AREAARETHECOMPONENTS ANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOMPLIANCE METHODISPRESENTED IN1983SUBMITTAL.

4%FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE4OF4 I,sospl4 TABLE7.14-2-2UNIT2FIREAREAS/ZONES OFCONCERNSEISMICGAPEVALUATION AREAPOSTULATED FIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLE LOADINQARE/(BTU/FT)(FT)EQUIVALENT FIRE'EVERITY(MIN)+.SUPPRESSION DETECTION SYSTEMEVALUATION 348~34A05,7354,20460015(4.3)3,21615(3.1)NONEMANUALDELUGEFORCHARCOALFILTERIN34ANONETHERMISTOR FORCHARCOALFILTERUNITIN34AFIREZONES348,34A,39,109AND50ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.

THESAFESHUTDOWNSYSTEMSAVAILABILITY ISPRESENTED BELOW:1.MS-INSTRUMENTATION ASSOCIATED WITHSTEAMGENERATORS 1AND4ISAVAILABLE INCONJUNCTION WITHMANUALOPERATION OFASSOCIATED MRVs.3910930,62215,8722,66735(23)89725(11.8)AUTOMATIC C02NONEIONIZATION ANDINFRAREDTYPESNONE2.AF3.RCS4.CVCS-5.EPSMANUALOPERATION OFAFFECTEDFM0212AND242INCONJUNCTION WITHREMOTEOPERATION OFOTHERREQUIREDSAFESHUTDOWNCOMPONENTS OFTHISSYSTEMOUTSIDEOFTHEEVALUATION AREAWILLUTILIZEAFSYSTEMTOSUPPLYAUXILIARY FEEDWATER TOSTEAMGENERATORS 1AND4.ThANDTcNORMALINDICATIONS AREAFFECTED, BUTALTERNATIVE INDI-CATIONCAPABILITY ISBEINGPROVIDEDASPRESENTED INMARCH1983SUBMITTAL.

ATLEASTONETRAINOFOTHERRCSSAFESHUTDOWNPROCESSMONITORING SYSTEMCOMPONENTS ISt.OCATEDOUTSIDEOFTHEEVALUATION AREA.THESAFESHUTDOWNCOMPONENTS ASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTTHECABLEASSOCIATED WITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.

SAFESHUTDOWNCOMPONENTS ANDCIRCUITSOFONETRAINOFEPS,WHICHINCLUDESDGAB,ARELOCATEDOUTSIDEOFTHEEVALUATION AREA.(THISFIREAREAISCONTINUED ONTHENEXTPAGE)+FIREZONES34,34AAND348ARECONTAINED INAFIREAREAFORWHICHTHECOMBUSTIBLE LOADINGIS5,909BTU/FT,AREAIS4,856FTANDEQUIVALENT FIRESEVERITYIS4.3MINUTES04FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF5 li'l"F TABLE7.14-2-continued)

SEISMICGAPEVALUATION AREAPOSTULATED FIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLE LOADINQ(BTU/FTc)

ARE(FT5)EQUIVALENT FIRESEVERITY(MIN)++SUPPRESSION DETECTION SYSTEMEVALUATION 348(cont;)6.CCW7.RHR8.ESW-CIRCUITSANDCOMPONENTS ASSOCIATED WITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATION AREA.MANUALOPERATION OFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.

MANUALOPERATION.

OFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATION AREA,ISAVAILABLE.

NOTAFFECTED.

EVALUATION AREADOESNOTCONTAINCOMPONENTS ORCIRCUITSASSOCIATED WITHTHISSYSTEMREQUIREDFORSAFESHUTDOWN.

22272339"1,02285,00928,7165,73530,6228,46010(0.6)lo05675(63.9)84035(21.5)60015(4.3)2,66735(23)NONEAUTOMATIC C02AUTOMATIC C02NONEAUTOMATIC C02NONEIONIZATION ANDINFRAREDTYPES'ONIZATION ANDINFRAREDTYPESNONEIONIZATIONANDINFRAREDTYPES1.MS2~AF3.RCSINSTRUMENTATION ASSOCIATED WITHSTEAMGENERATORS 1AND4ISAVAILABLE INCONJUNCTION WITHMANUALOPERATION OFASSOCIATED MRVsOUTSIDEOFTHEEVALUATION AREA.MANUALOPERATION OFAFFECTEDFM0212AND242ANDFRV247INCONJUNCTION WITHREMOTEOPERATION OFOTHERCOMPONENTS OFTHISSYSTEMREQUIREDFORSAFESHUTDOWNOUTSIDEOFTHEEVALUATION AREAWILLUTILIZEAFSYSTEMTOSUPPLYAUXILIARY FEEDWATER TOSTEAMGENERATORS 1AND4.ThANDTcNORMALINDICATIONS AREAFFECTED, BUTALTERNATIVE IND1CA-TIONCAPABILITY ISBEINGPROVIDEDASPRESENTED INMARCH1983SUBMITTAL.

ASLEASTONETRAINOFOTHERRCSSAFESHUTDOWNPROCESSMONITORING SYSTEMCOMPONENTS ISLOCATEDOUTSIDEOFTHEEVALUATION AREA.FIREZONES22,27,23,348AND39ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.

THESAFESHUTDOWNSYSTEMSAVAILABILITY ISPRESENTED BELOW:(THISFIREAREAISCONTINUED ONTHENEXTPAGE)4FIREZONES34,34AAND348ARECONTAINED INAFIREAREAFORWHICHTHECOMBUSTIBLE LOADINGISANDEQUIVALENT FIRESEVERITYIS4.3MINUTES44'FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE2OF55,909BTU/FT,AREAIS4,856FT I'i+Pt TABLE7.14-2-continued)SEISMICGAP'VALUATION AREAPOSTULATED FIRELOCATION22(cont.)ADJACENTZONEOFCONCERNCOMBUSTIBLE LOADINGARE/(BTU/FT4)

(FT)EQUIVALENT FIRESEVERITY(MIN)++SUPPRESSION DETECTION 4.CVCS-5.EPS6.CCW7.RHR8.ESWSYSTEMEVALUATION THESAFESHUTDOWNCOMPONENTS ASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTCABLEASSOCIATED WITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.

SAFESHUTDOWNCOMPONENTS ANDCIRCUITSOFONETRAINOFEPS,WHICHINCLUDESDGAB,ARELOCATEDOUTSIDEOFTHEEVALUATION AREA.CIRCUITSANDCOMPONENTS ASSOCIATED WITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATION AREA.MANUALOPERATION OFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.

MANUALOPERATION OFTHEAFFECTEDVALVES'HICH HAVECABLESINTHEEVALUATION AREA;ISAVAILABLE.

NOTAFFECTED.

EVALUATION AREADOESNOTCONTAINCOMPONENTS ORCIRCUITSASSOCIATED WITHTHISSYSTEMREQUIREDFORSAFESHUTDOWN.

506910944,3092,99815,8723,20017.91489745(33.2)MANUALDELUGEFORCHARCOALFILTER15(2.2)MANUALDELUGEFORHVACUNIT25(11.8)NONEIONIZATION ANDTHERMISTOR FORCHARCOALFILTERIONIZATION AND-THERMISTORS FORHVACUNITSNONE1.MS2.AFINSTRUMENTATION ASSOCIATED WITHSTEAMGENERATORS 1AND4ISAVAILABLE INCONJUNCTION WITHMANUALOPERATION OFASSOCIATED MRVsOUTSIDEOFTHEEVALUATION AREA.ONETRAINOFTHISSYSTEMINCLUDING PUMPPP-3W(ANDASSOCIATED CABLES)ANDFM0212AND242ANDASSOCIATED CABLESARELOCATEDOUTSIDEOFTHEEVALUATION AREA.FIREZONES50o69AND109ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.

THESAFESHUTDOWNSYSTEMSAVAILABILITY ISPRESENTED BELOW:(THISFIREAREAISCONTINUED ONTHENEXTPAGE)4%FIRESEVERITYVALUESAREASSUMEDANDACTUAL)PAGE3OF5 JpI,IJg4Ip4tl TABLE7.14-2-continued)

SKMIGAPEVALUATION AREAPOSTULATED FIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLE LOADINQARE/(BTU/FT)(FT4)EQUIVALENT FIRESEVERITY(MIN)+~.SUPPRESSION DETECTION SYSTEMEVALUATION 50(cont.)3.CVCS-COMPONENTS ANDCIRCUITSASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTONEOFTHECHARGINGPUMPSSUCTIONVALVECABLE(REDUNDANT VALVEISAVAILABLE)

.4.CCW-CIRCUITSANDCOMPONENTS ASSOCIATED WITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATION AREA.MANUALOPERATION OFTHEAFFECTEDVALVESREQUIREDI'ORCOLDSHUTDOWNISAVAILABLE.

5.RHR=MANUALOPERATION OFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATION AREA,ISAVAILABLE.

6.THEFOLLOWING SAFESHUTDOWNSYSTEMSCOMPONENTS ANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATION AREA:*o.RCSoEPSoESW691092,99815,87217i91489715(2.2)MANUALDELUGEFORHVACUNIT25(11.8)NONEIONIZATION ANDTHERMISTORSFORHVACUNITSNONEFIREZONES69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION REGARDING SAFESHUTDOWNCAPABILITY ASSESSMENT.

FIREZONE69CONTAINSNOSAFESHUTDOWNSYSTEMS,COMPONENTS ANDCIRCUITS.

THESAFESHUTDOWNCOMPONENTS ANDCIRCUITSLOCATEDINTHISEVALUATION AREAARETHECOMPONENTS ANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOM-PLIANCEMETHOD,ISPRESENTED IN1983SUBMITTAL.

  • ~FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE4OF5 lhj'1 TABLE7.14-2-.continued)

SEISMICGAPEVALUATION AREAPOSTULATED FIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLE LOADINQ(BTU/FT)(FT3)EQUIVALENT FIRESEVERITY(MIN)++SUPPRESSION DETECTION SYSTEMEVALUATION 109506915,87244,3092,99889725(11.8)3,20045(33.2)17~91415(2.2)NONEMANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITNONEIONIZATION ANDTHERMISTOR FORCHARCOALFILTERIONIZATION ANDTHERMISTORS FORHVACUNITSFIREZONES50,69AND109ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.

THESAFESHUTDOWNSYSTEMSAVAILABILITY ISPRESENTED BELOW:1.MS-INSTRUMENTATION ASSOCIATED WITHSTEAMGENERATORS 1AND4ISAVAILABLE INCONJUNCTION

'WITHMANUALOPERATION OFASSOCIATED MRVsOUTSIDEOFTHEEVALUATION AREA.2.AF-ONETRAINOFTHISSYSTEMINCLUDING PUMPPP-3W(ANDASSOCIATED CABLES)ANDFM0212AND242ANDASSOCIATED CABLESARELOCATEDOUTSIDEOFTHEEVALUATION AREA.3.CVCS-COMPONENTS ANDCIRCUITSASSOCIATED WITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATION AREA,EXCEPTONEOFTHECHARGINGPUMPSSUCTIONVALVECABLE(REDUNDANT VALVEISAVAILABLE)

.4.CCW-CIRCUITSANDCOMPONENTS ASSOCIATED WITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATION AREA.MANUALOPERATION OFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.

5.RHR-MANUALOPERATION OFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATION AREA,ISAVAILABLE.

6.THEFOLLOWING SAFESHUTDOWNSYSTEMSCOMPONENTS ANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATION AREA:oRCSoEPSoESW~ENFIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE5OF5 iver UNTII84T2FZIAfZIFZ18SEENOTEIITYPJFZ188CURBINGPYPJ24ZIFNOTE:PlaMOVASLEWALLS81PI84PROOMS.P21881~ON411180HPEOESTALS.

Q3~NdeNSAREeavAPFROxa4ATeNS Q4STAFIWAYUPTOFZNO.8NOTTOSCALEIMO.310IMO-32FZIC)11'QFMSWgIgIfZIOgIIIV+SCREENMESHGATES(TYPJ2P358FZIGPP.35WIZ'~FZIH18lMO.310c042IOGHIMO-320POWER/23'058/'/800311I18$003&2SCREENMESHGATEFIGURE7.2RHR/CTSPUMPAREAAUXILIARY BUILDINGFIREZONE1,1A-HELEV.573' M~kkEWXLISK+%%%%%%%%&%%

E%40~eao~~

4'~4'0'GTABTESTSREAXBIXFMR21CMC35'FMR21SMCB4'1SMC4'iPZRHTRXFMR21PHA4'0'GTCOZESTBREAKERFZRHTRXFMR21tHC35'OVERHEADODOR,NOTE:DIMENSIONS AREAPPROXIMATE FIGURE7.4TRANSFORMER ROOMUNIT2FIREZONE20ELEV.591' 0

HNOTE.1fIREZONE2$GISLOCATEDIMMEOIATELY BElOWTHEUNITDNEANOTWOESWPUMI'REAS 2ESWPUMPSONPEDES1'ALS 40OffTHEGROUNDDIMENQONSAREAPPROXIMATE SlHREEHOURRATEDflREWALLi%471ESWPUMPSFZ29AUMT2ESWPUMPSFZ29C--HATCIIDOWNTO200WITllLADDIRWMO.701ESWSESTRAMIERWMO.703fSWSESTRAINER2ESCIIIEHMESHACuSSOCal19W00HARGEVALVES002WSCIIEEHMESIIACCESSSCNIFZ29F.LXBT1MCCs1PSA1.PS0[iijfSWSWWMO70225'FZ29BfSWSWWMO70lSTRAINER26dFZ290FZ29FWT2MCCOY2PS-D96IGURE 7.5.1ESWPUMPAREASUNIT15UNIT2FIREZONES29,29A,298,29C,29D,29E,29FELEY.591'

~ih,~~4~Fmsr:y'~l~mll4QQ~g~~~'

EIIRWa~a 1V ESWSEWRV774I~STRAINERlEPULLBOXIT0FROMEMBEDDEDCOtKXXTHATCHDHTO2BGWIIV.771fSWSEESWPP.1E+WRY.764WRV.761WMO702SCREfNMESHDOORWRV.776STRABIER.2W WRV.77$fSN-Pt.2WWRV.76$ESWSEfMBEDOED~VLLBOXFROMEMBEDDEDCOHOUITO0elNOTf:DIMENSIONS AREOtA.YAPPROXIMATIONS

~AREONO'BGNtEDESTALS15IGURE 7.61ESWPUMPAREAUNIT2FIREZONE29CDELEV591' I~.FJl9'L'I IORSCILEENilESHDOOltIICCRt5AIICC2-PS-0NOTE:DIMENSIONS AREAPPROXIMATE CONCRETEFLOORFIGURE7.6.2ESWMCCAREAUNIT2FIREZONE29FELEV.591'

FlGURE7.7.1F(REZONENO,290NNOTE:PIDIMENSIONS AREONLYAPPROXIMATCNS Q~MCCOYARENONSAFESHUTDOWNEQUIPMENT WMO-701ESWSEESWSWESWSW~WMO.70AWMO701lWMO703gESWSEII(Il)1IIII,I/III/III~>/[~lI'II)(II~~~~~~1~1~(((,"4'9"5"'.<<Arr(~'),<<Il,~.Y<<vrP>(vr)'rr)ogI)",)'APP7EUNITa)(.I..<<MCC1PS.BMCC.EPS8)4.,v))()((')r)(r,jh'PP7EUNITN(rvg((Ag~p"'+CA".'<<r'.')r((WrYr(~

Sw(;('gWMO701MCCEPSOMMCC\PSCCABLETRAYSTTYPICALI47'37pr'P.TW<<~r)))p;'Ar((:P..r)ApgSTAIRSUP

~~uu&uUP-(i)6UPUPPARTPLANSGREENHOUSE EL.691LEGENDDRYCHEMICALFIREEXTINGUISHER COgFIREEXTINGUISHER 160LB.WHEELEDDRYCHEMICALEXTINGUISHER TELEPHONE QQGAITRONICS HOSESTATIONFIGURE7.7.2MANUALFIREFIGHTING EQUIPMENT (LOCATEDINTHESCREENHOUSE)AVAILABLE FORZONE296 f'Itg

~'P~~T~~L00~il~5S.bESSENTIAL SERVICEWATERPUMPSUCTIONPARTPLANSGREENHOUSE EL.673LEGENDQDRYCHEMICALFIREEXTINGUISHER

+CC2FIREEXTINGUISHER FIGURE7.73MANUALFIREFIGHTING EQUIPMENT LOCATEDINZONE296 Ir MRV243MPP241MPP242MPP-210MRV.2'13MPP.211MPP212EPT243EP'T2'1333A137'PT.223 NOTE1EXMENSCNS AREONLYAPPROXAlATIONS 2EPT'ARETICELECTROPNEUMATC TRANSMITTERS FORMRV213.223.233,243EPT223EPT233338110EPT233FIGURE7.8EASTMAINSTEAMENCLOSURE MAINSTEAMPIPINGANDWESTNESWPIPINGAREAUNIT1FIREZONES33,33A,34B,ELEV.6".2' MPP210MRV213MPP211MPP212MPP.24OMRV243MPP.241MPP.242MRV243MRV213MPP210MPP212MPP240MPP241MPP242EPT.243EPT21334A34BEPT.233EPT223NOTE.PiEXMENSIHS AREONLYAPPROXIAATIONS EPT'4AREtHEELECTROPNEUMAT1C TRAkShetTERS FORMRV213.223.2ll.243FIGURE7.9EASTMAINSTEAMENCLOSURE IVIAINSTEAMPIPINGANDWESTNESWPIPINGAREAUNIT2FIREZONES3434A34BELEV.6't2' rfEI~/

IRV-310IM0.314IMO312RH-128EHE-17EICM311LTORIMO322IRV320RH128WICM.321HE.ITWIMO320WIREMESIICsAIEF.LNo58~F.ZNo44Axo'"I]PllllJEOUIP.67'I"WIREMESHGATEPASSENGER

<<WIREMESHGATECM0419.gZF.ZNa44EFZ.N0.44F I~z'~oPagox13RH~128EIRV310IMO314HE.IFEICM5HLToRRH128WIRV'320IMO522ICM321HEITWIMO324WIREMESIIGATEF,Z.Na44N9ELEV.62O'6"RAMPUPUPToELEV.;.633'OLUME CONTROLTANKELEVATORgVOLUMECONTROLTANKtIFIwswrwUPToELEV.635FWNo.57ILADONRUP'10NO'MONITORTANKS""":**::,pq,...,,ZwksgK

~..:s~>>~;"~s>>w:,

pg~>>";so>>;"$

1-.~~~;",:.>>%,.c.g">>>oFsS>>.'";:.":>>

>>s}w>>wag2jvs~}'"hwggLSw~rg'Qj'$~+

M>>'Mw'AZVA'7}>>>>yw>>">'pg>>ws, ay%'ws'ssrcs>>>>wwss F.Z.No.S6F.Z.Na45QGPt6090~I-AZV-A(CM&1-8XI1/~'~CMO-420 WMO.731CMO-410WMO-733wwo:rss>>'S>>S Lg'M0.757 HEISEHEISWWMO.TCMO410HEISEHEISWWMO-736WMO738CMO-420IPPIOE2PPIOWCMOWIIWCCWPUMPAREASPAREZ~IOE~n~>>WIREMESHGAIE/PIC02TANKLAUNDRTROOMIPPIOW1342ANOTE:OIMENSIONS AREAPPROXIMATE FIGURE7.10.1AUXILIARY BUILDING-EL.609CENLI'ALOUTLINEOFFll(EZONES44N,44S Ilj'L%%%%%XXAXLA&iAX%%%%%%%%%%

~~~~0~~~'~~

fta4,~T MkaVJk58KKCKKRRHF55~MLXAX%%XA%XAXA%%%%X~A%%%%%%~

~~0P~~~~0s~ygy~~

w\'v~,~'1VyVy+LI4.4.4~~~)tk~~~~IlP~~~gQggei>i5e<::far$5$ligWac>c~~4~a~~~~~~~~~~

'li1'l\>K~

PRELIMINARY TOBALANCEOFEL.609{ZONE44)AREAPROTECTION Lnn----r----n--"n+Ix7-7DNDQ~lh6(TYP.OFI5)ISPAREIIIKIO-IOI/2"AFFIIIICI0-4IAFF~III$7LOAFFIII-EI~IIJI-~--q-~IITOD-9-9AFF~~---~---afIII~A(SEEFIGURE7.10.6)......IIn--Q-n--QIIFROM+DELUGEVALVEI1IIJ)6IO-IOI/2AFF%7-9AFFNOTEAPPROX65SQft/hdLEGEND0I/2SPRINKLER I/8AUTOMATIC WATERSPRAY NOZZLEQPILOTHEADAFF-ABOVEFINISHEDFLOORTOD-TOPOFDUCTFIGURE7.10.5PROPOSEDPLAN.LAYOUTOFSUPPRESSION ANDDETECTION SYSTEMS

~~'I~

~I~l~~~~~~~~~~~~~~'~~~~~~

l~IU'IUU'U TOPOFDUCT618'-932x5824x443HOURFIRERATEDBARRIERW/SI'HERMOLAG PREFABRICATED 330PANST4B6.5(TYP.)FLEVEL609'W'ECTION B-BDUCTPRELIM)NARY 3HOURFIRERATEDARRIEWl'TSI'HERMOLAG PREFAB330PANELSCObFIN.ELEV.609'W'ECTION A-AC9YCL-LSPAREPUMPS15'W'~SEEDETAILFIGURE7.10.9+lE+2WPUMPS~HVACDUCTABOVEIDWG12-5717I55a3241WPUl.tPIPARTIALFLOORPLANAUXILIARY BUILDING-ELV.809'-0Sb@35AIRSHAPEUPTOF252CLKNOTE:DIMENSIONS AREAPPROXIMATE NOTTOSCALEFIGURE7.10.7FIRE BARRIERBETWEENCOMPONENT COOLINGWATERPUMPS

Iv4"ft"J~b*VF'SS~C PRELIMINARY D.G.GOOKPLANT-PUMPSFIREBARRIERDETAlLTROWELGRADE"TSI"330APPLIEDTOST4B6.5FOR3HR.FIRERATING3HOVRFIRERATED1/2""TSITHERMOLAG" 330PREFABRICATED PANELSWITH'I/O"EXPANDEDMETALBETWEENPANELSSEISMICSuppORTFIGURE7.10.9FIREBARRIERBETWEENCOMPONENT COOLINGWATERPUMPS HOTE61TUR8SUPCA8fIICCA83OSCILLOGRAPH 4SfISMCM(IM1ORINSTRUMEHT CA86AUXRllAYCAR'AR816AUXRELAYCAR.AR81'OCOISTFICA8CRCO8LIGHTINGCASINET9RMSCTPANEL10TRAXI8REACTORPROTECTCA8.1ISAFfTXJAROSAClUAIIOH CA8S.11REACIORPROTECl.COMPU'lER 1IPUTCARS16'ROTIMATHCONIROLROOMIO1112SROHTOfPAWL4IO.?c;PANELPODUNFT2;~;6SClHATCH'TOQTII~CABlfYAULT~/IC)),8'+)'cryv>PROPOSEPFXIE)AINKII4';"93'IIOURRATEOROLLUPDOORTOURT1CONTROLROOM26HUTE1OWENSIONSAREEÃRYAIT&OXIMATIONS FIGURE7.11CONTROLROOMUNIT1ZONE3ELEV.633' 1t~~r 3-IIOURRATEOROLL-UPOOOR1011>cCcc~:..c 8T'gHATCIITOCABLEVAULT.-E-.YFRaITPANEL:-..I..;.,......lO'..:;.'.

'ANEL.FORLSRT1'UNII1MAWCONIHOlROOM36PROPOSEOFIREBARRIERNOTESIOCTXSTRCASCACO3LIGIITWGCAR3fcOVfIWOR 4AMHINAMYLIFILHCUSICIf4OSCXIOGHAM5HlACfORVl'SSIILLVLLCARNEf6AUXHllAYCASAH82'.AUXRELAYCASAR818LIGIITWGCAB9REAC1OHPHOTECT COMPUTERCONTROLWPUTCARSIOSATEGUAHDSACTUATION CARS11.TRAN8REACtORPROTEC'fCARSTOLXRT1CONTROLROOM35'OTEQIEXMENSIOKSAREOtRYAPPIOXPAATIONS FIGURE7.12CONTROLROOIVIUNIT2ZONE54ELEV.633' V<Ia<'I<~'I~4l<h<ll<<l' FlG.7.'1~-'IUNIT1'69OE')rAaa%iW>Aw5t~+~1.)UNIT2650'33'-S.OD0~~Q9OD~5SOSg~0~055~5~VV'Lvvp%~'VirJapY~orosoosoODQsooat.~4C/ygg/ZC44609'Oe72)c36*lo6868567'73'

N650'IG.7.13-2Q52QoUNIT0A~'9QE'IYi,r)r>VVgsiaswA'Pk'VVIVV/PV'l+VQVg)V VVV'IVVvv\VjvV2~ONOSO0$0z+i.twN,>P"t.'+A.>.UNIT2QDQ52IQ49QoQDQ5O633'0%0~XOSOW~~~5W%~IWOW~4CioIIC44609'QB6B6B567'~PtPcAHod4/P1&AC'kl'fg OvToipgAREA/!573' UNITUNIT2'9OE633'.ODE0a~qPI\rvrYJ%v\%jYvrvv'r'rvjVrg'g\Q4eoo~SOROS~~I~IEISS.rvvvvrvvrvrv~OSOSOORO~~ODQsoHemicsurvive0oQ~~:4CC44=6B6B587'73' r>II~f NUNIT1A59PEr~Mi~~~.'->AvfUNIT2650'Krvryrv~vrevrirvrvvri.yvrpO42IwrvwvvharvvrrirvOOSOSOOSO~~~gOO5OODO52I633'SONOA~~E~0S0LOS4CC44609'B6B587'73' h

UNIT1UNIT2FIG.7-13-569QE'L&~id'v"~650')viljvi%pVJlvvlvO'Lvvtay'rwg~w'vwvv\vvwv'rwvvSoSOLO~~OkOSOOD052:633'8~O49O.~SOSOSOS~~~IO564CC44609'QS6B587'73' PF~"lIlf UNIT069QEW~rAh.rACm~UNIT2650'IG.7.43-6SODn,()I)V\/'leafQ49ODV'JVVjVP'pYg't~Vlhg+V'0%VV\rYLv'Y~OSO~OSOODO59OD052;633'~.5k~BOLOS~5~4C~5~8C44609'Og686BBi'A'80587'uPFW~VgffA4g.C'ABcZymg.r(zovE~-~IJOElZV.C'=U(Z42.VZ.i2)

Z7AA)ZA~/4ulr188PEAJE'7:C!>~<>,+Drgc)OgPZNblg76'33573' UNIT1UNIT2'FIG.7.13-?eeQp650'Q,J)i((YV/%jfVrrVP~Oo"MVVVVV)%VV~SOSORoO~SOSOSa~~~OEN4CC44609'e6868587'73' FIG.7.13-8SUPF'LYE><HausrLXWuSrSuV~LyLlf'PERC;on/T.VOLUPTE650'L~'3luV)~UI'f'LYFAA/S+ox+0Y69OEulPLYFAAI-5~ltVwtrealetstye,tqyst~vwCQlOlCmc~UPPERC.odr.VOLUMELoeERCoh/TVOLLIME633'xHAu<yFAe'S4950aoFXHAu6'IFfWa~~~ORORORORORORORORORORORORO ORORORORORORORORORO

~RR~~~ROROROR28~3f~22(~lLcwEeGoATYOLUHE609 4~lPY~,4'+orJgI'It0 8.PROPOSEDMODIFICATIONS Introduct ionThesafeshutdownsystemreviewfortheD.C.CookNuclearPlantindicated thatmostfireareaswereincompliance withAppendixR.Themajorityoftheareasnotincompliance willbeprovidedwithalternate shutdowncapability, whichisdiscussed indetailinSection5.Acomprehensive firehazardsanalysiswasperformed ontheremaining fireareas.ThemajorityoftheseareaswillbebroughtintoSectionIII.Gcompliance viafireprotection modifications.

RefertoTablel-lforthespecificIII.Gcompliance measuresachieved.

Thebalanceofllfireareas,orzones,requireexemption requestsorengineering evaluations andwillbemodifiedtothegreatest.

extentpracticable toensureatleastonetrainof.safeshutdowncircuitsandcomponents remainsfreeoffiredamage.Thespecific'exemption requestsarediscussed inSection7.Sincethe1983submittal, AppendixRlong-term conformance workhascontinued atD.C.Cook.Asaresult,severalI'ngineering evaluations havebeenperformed thathaveaddedseveralfireprotection modifications andalleviated theneedforseveralfireprotection modifications previously identified inthe1983AppendixRsubmittal.

Theengineering evaluations performed since1983arecontained inSection9.Page8-1 Thissectionidentifies theproposedfireprotection modifications necessary tobringfireareasintocompliance withSectionIII.Gortosatisfytheassumptions madeinSection7foreachexemption fromtheprovisions ofSectionIII.Grequested ortosupporttheengineering evaluations madeinSection9.Inadditionto'thefireprotection modifications proposedinthissection,certainmechanical andelectrical systemmodifications willbeperformed tomeettherequirements ofSection=III.G.3.Thesemechanical andelectrical systemmodifications, whichwereproposedanddiscussed'n Section.5;whenimplemented, will.providethealternative shutdownc'apability proposedfor,D.C..Cook.

';Thesealternative shutdownmodifications

'are.'repeated inthis.sectionby-'ystem classification (e.g.,ESW,'CVCS,'CW, etc.).Duringthecourseo'fthe-electrical system.coordination study,variouselectrical c'ircuitprotective deviceprotection curvesweremodifiedtooptimizeelectrical coordination.

Recalibrat::ion oftheinstalled devicestothesenewcurveswillalsobeimplemented asaplantmodification.

Thetotalscopeofthesesystemandfireprotection modifications, asproposed, willbringD.C.Cooktoauniformlevelofprotection inallfireareassuchthatfurthermodifications wouldnotsubstantially enhanceoverallfireprotection.

Anumberofmodifications, asoriginally

proposed, Page8-2 Owerecontingent uponeithertheNRCacceptance ofthealternative shutdowncapability orthegrantingoftheexemptions discussed inSection7,whichhavebothbeenreceived.

FireProtection Modifications Themodifications discussed inthissectionarethosespecifically involving fireprotection featuresandarecategorized asfollows:(l)ConduitandCableTrayProtection (2)Suppression andDetection (3)Boundary.Modification Themajorityofthemodifications proposedwillupgradetheratingsoffireareaboundaries

.to.provide.afire.resistance inexcessoftheexpectedcombustible,.loading on,either.sideoftheboundary.

Conduitandcable.tray.protection,

.whenrequired, villprovideafirerating.,equivalent toonehour.andprotectatleasioneredundant trainofsystemsinthezoneorarea.Insomecases,additional conduitsandcabletraysmaybeprotected eventhoughnotrequiredforseparation ofredundant trainsofsystems.Thismayoccurwhere,duetothephysicalproximity ofconduitsandcabletraysnotrequiring protection, adequateprotection cannotbeachievedwithoutprotecting theadjacentconduitsandcabletrays.Firestopshavebeenprovidedincertaincabletraysinordertoremoveintervening combustibles asanissueinvariousplantlocations.

Unitlfirestopping wasPage8-3 performed underRFC-01-2681 whileUnit2firestopping wasperformed underRFC-02-2696.

Thesuppression anddetection modifications willcomplywithapplicable fireprotection codesandstandards forinstallation andcoverage.

Themodifications made-will,providesuppression anddetection inallareascontaining redundant safe-shutdown equipment wherealternate shutdownisnotpractical oranexemption isrequested.

Theboundarymodifications aregenerally madetoupgradefireareaboundaries toaratingcommensurate withthecombustible fireloadingofthefirearea,ortoprovideprotection between-two redundant divisions.

Themodifications proposedwillbringtheD.C.CookPlanttoauniformlevelofprotection forallareassuchthatfurthermodifications would.,not.enhancefire.protection:

safety.Themodifications; proposed,,'re described

'n-thesubsequent paragraphs.

8.1FireArea1(FireZones1,lAthrouh.1H,136,137,138A,138Band138CRHRandCTSPumArea8.1.1ConduitandCableTraProtection Thepowercableinconduits8003R-1and8003R-2forthewestRHRpumps(1PP-35Wand2PP-35W)Units1and2,respectively, willbeprovidedwithfireprotection barriersequivalent toone-hourrating.Table8-1providesalistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseracewaysandtheirassociated components.

TheconduitsarelocatedintheextremePage8-4 northwest andsouthwest cornersofthefireareaenteringfromconduitembeddedinconcrete.'he conduitsarebeingprotected inordertosupportanexemption fromthecriteriaofAppendix-R; SectionIII.G.2(c).

SectionIII.G.2(c) requiresthatatleastonetrainofredundant safe.shutdownequipment orcableslocatedinthesamefireareabeprovidedwithonehourprotection.

-Inaddition, detection andsuppression arerequiredforthearea-;Theexemption inSection7.2ofthisreportisrequested fromthesuppression criteriaofAppendixR,SectionIII.G.2(c).

8.1.2SuressionandDetection Theeightpumpcubicleswillbeprovidedwithautomatic firedetection withremotealarmingcapability inthe.ControlRooms";Thismodification:is requiredtosupporttheexemption.

requesti.'nSection7.2ofthisreport.withrespect-todetection criteriaofIAppendixR,SectionIII.G.2(c).

'roviding detection capability inthepumpcubiclesresults'n'etection innormallyaccessible

--locations, ofthe,.fi.re,.area.

8.1.3BoundarModifications/Evaluations Thesealsandpenetrations inthewallsseparating theeastRHR.pumpsfromthewestRHRpumpsofbothunitswillbeupgradedtoathree-hour firerating.Thismodification isrequiredtoseparateredundant safeshutdowncomponents thatarelocatedinthesamefireareaperthecriteriaofAppendixR,III.G.2(c).

Inaddition, itisrequiredtosupporttheexemption requestinSection7.2ofthisreport.Page8-5 Ceilingpenetrations willbeupgradedtoprovideatleastaone-hourfireratingtoseparatethisfireareafromtheoneaboveonthe587ftelevation oftheAuxiliary Building.

TheAuxiliary BuildingHVACductexemption presented inSection7.13providesjustifications

.fortheundampered ductspenetrating t'hroughthe'ceiling ofFireZone1.Theventilation duct'nteringthecommonairshaft(FireZones12or22)fromtheeastandwestRHRpumpsofbothunitswi'llbeprovidedwiththree-hour-rated damperstoseparatethetwotrainsofeachunit'sRHRpumpsperthecriteriaofAppendixR,Section,III.G.2(c) and:alsotosupporttheexemption requestinSection"7.2ofthis.report.Theengineering evaluations 1presented inSection9.4justifytheundampered HVACopenings'to thesesame,airshafts'romthecontainment spraypump.,'cubicles.

Theengineering'evaluation-'resented inSection9.33justifies

~stheundampered shaftopeningconnecting

=FireZone138BwithFireZone6A.Thestairwayopeningbetweenthepumpcubicleswillbeprovidedwithautomatic suppression fromthemodifications proposed'in FireZone5toseparatethisfireareafromtheoneaboveonthe587'televation oftheAuxiliary Building(seeSection8.2).Anengineering evaluation hasbeenperformed justifying theundampered ventilation ductsbetweenFireZones1Aand1BtoFireZone12andbetweenFireZoneslEandlFtoFireZone22.(SeeSection9.4.)Page8-6 Anengineering evaluation hasbeenperformed justifying theunsealedopeningsinleakagedetection pipechasesthatconnecttheRHRandcontainment spraypumpcubiclesonthe573ftelevation (FireZoneslAthroughlH)withtheirheatexchanger cubiclesonthe609ftelevation (FireZones44Athrough44H)..Openingforleakdetection purposesareprovidedwithinthechargingpumpcubiclesonthe587ftelevation (FireZone62A.,62B,62C,63A,63Band63C).(SeeSections9.31and9.32.)8.2FireZone5EastEndoftheAuxiliarBuildinBetweentheUnit1andUnit2CharinPumCubicles~la,58.2.1ConduitandCableTraProtection Thecabletrays(lAZ-C50, lAZ-C46AND1AZ-P8)andconduit8026R-1fortheredtrainofUnit1CVCSwillbeprovidedwithfireprotection barriersequivalent toaone-hourrating.Theconduitsforemergency diesel,generators (Unit1DGAB)8506R-1and(Unit2DGCD)8155G-2andtheassociated pullboxeswillbeprovidedwithfireprotection barriersequivalent toaone-hourrating.Table8-1providesalistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseraceways,and theirassociated components.

Theconduitsarebeingprotected inordertobringFireZone5intocompliance withthecriteriaofAppendixR,SectionIII.G.2(c).

SectionIII.G.2(c) requiresthatatleastonetrainofredundant safeshutdownequipment orcableslocatedinthesamefireareabeprovidedwithonehourprotection.

Inaddition, detection andsuppression arerequiredforthefirearea.Page8-7 8.2.2SuressionandDetection Theexistingautomatic drypilotreactionsprinkler system,wi.llbeextendedtoprovideprotection aroundtheperimeter ofthestairwayopeningsthat'eadto:FireZone1belowandFireZone44Nabovetoensuretheintegrity oftheboundaryseparating thetwofireareas.8r.2.3BoundarModifications/Evaluations Theaccesscontrolgatesandtheventilation openingstothechargingpumpcubicleswillbemodifiedasdescribed inSection8..24.3inordertoensuretheintegrity oftheboundaries.

betweenseparatefireareas.Thepenetrations toFireZones44N,62A,62B,'62Cand63A,.63B,,63C.will beprovidedwithsealsequivalent totheratingoftheconcrete.slab/wall inordertoensuretheintegrity of,the.boundaries betweenseparatefireareas.Theengineering"eval'uations presented inSections9.6and9..28providejustification forcombining FireZones6Aand61withFireZones5,6N,6M,,64A64B,65Aand,;,65B.

Theengineering evaluations presented inSections9.34and9.37providejustification forundampered ventilation ductsandminorunsealedpenetrations betweenFireZone5andFireZones36and32,respectively.

Page8-8 8.3FireZones6A,6N,6M,6S,61,64A,64B,65Aand65BAuxxlxarBuxldinElevations 587ftand601ft8.3.1ConduitandCableTraProtection Thefollowing racewayswillbeprovidedwithfireprotection barriersequivalent toaone-hourfirerating:8505R-1anditsassociated pullboxforUnit1DGAB;troughs2AZ-C80,2A-C14,2A-C15,2AZ-C60,2AZ-C58,2AZ-C59,andconduits9747R-2,9748R-2,8744R-2,8786R-2,and9767R-2fortheredtrainofUnit2.AFW;troughs2AZ-C58(listedabove),2AZ-C75,2AZ-C62and2AZ-C86fortheredtrainofUnit2CVCS;conduit8154G-2anditsassociated pullboxfortheUnit2DGCD;cabletrayslA-P20,1A-C55,lAZ-P9,lAZ-P8,lAZ-C54,lAZ-C56and1AZ-C50fortheredtraino'Unit1CVCS.'able8-1providesa-listbyfirezoneofth'wrappedraceways, thecablesofconcernwithinthoseracewaysandtheirassociated components'.

Theconduitsarebeingprotected t'oensurecompliance withthecriteriaofAppendixR,SectionIII.G.2(c),

whichrequiresthat"atleastonetrainofredundant s'afe'shutdown equipment orcableslocatedinthesamefireareabeprovidedwithonehourprotection.

Inaddition, detection andsuppression arerequiredforthefirearea.Theopencabletraystraversing thezonefromthenorthsidetothesouthsidewillbeappropriately fire-stopped topreventfirepropagation fromonesectionofthefirezonetotheother.'hismodification isrequiredtoensurecompliance withthecriteriaofAppendixR,Page8-9 SectionIII.G.2(b),

whichrequiresa-minimumof20ftofhorizontal separation withoutintervening combustibles betweenredundant safeshutdownequipment orcableslocatedinthesamefirearea.Inaddition, detection andsuppression arerequiredforthefirearea.8;.3.2'uressionandDetection Theexistingautomatic drypilot,preaction sprinkler systemwillbeextendedtoprovideprotection aroundtheperimeter ofthestairwayopeningsthatleadtoFireZones44Nand44SaboveandfromFireZone'1"below'n'rdertoensure"the-integrity-of.-boundaries betweenseparatefireareas.8..3.3~BoundarModifications/Evaluations Thepenetrations'.in the,ceilingof.'ireZones6N,6Mand6Stotheelevation aboveFireZones44N-and44Swill,be'provided withsealsequivalent"to"the ratingoftheconcreteslabinordertoensuretheintegrity

'ofboundaries betweenseparatefireareas.TheAuxiliary BuildingHVACductexemption presented inSection7.13providesjustifications thattheundampered ductspenetrating throughthefloorandceilingofthesefirezonesdonotimpact'afe shutdowncapability.

Theengineering evaluation presented inSection9.4providesjustification forundampered ventilation ductsfromFireZones64Aand64BtoFireArea12,alongwithundampered ventilation ductsfromFireZones65Aand65BtoFireArea22.Page8-10 Theengineering evaluations presented inSection9.6and9.28providejustification forcombining FireZones6Aand61withFireZones5,6A,6N,6M,69,64A,64B,65Aand65B.Theengineering evaluations presented inSections9.6and9.33providejustification fornotsealingtheunsealedopeningsandpenetrations intheboundaries ofFireZone6Atoadjacentfirezones.However,unsealedpenetrations totheUnit1andUnit2chargingpumpcubicles(FireZones62A,62B,62C,63A,63B,and63C)wererequiredtobesealedinordertoensuretheintegrity ofboundar,ies betweenseparatefireareas.8.4FireArea12Unit1Quadrant2PiinTunnel8..8'8Noneproposed8.4.2~SuressionandDetection Noneproposed8.4.3BoundarModifications/Evaluations Anengineering evaluation hasbeenperformed (seeSection9.4)requiring three-hour fire-rated damperstobeinstalled intheHVACpenetrations totheUnit1chargingpumpcubicles(FiredZones62A,62Band62C).Inaddition, theunsealed'penetrations toFireZones62A,62B,62C(seeSection9.4)and33Bwillbesealedwitharatingatleastequivalent totheboundaryrating.Bothsetsofmodifications arerequiredinordertoensuretheintegrity ofboundaries betweenseparatefireareas.SeeSeismicGapExemption RequestSection7.14forjustifying theunsealedPage.8-11 seismicgaptoFireZone33B.SeeSection9.23forjustification ofthemanwayopeningfromthetrenchinFireArea12toFireArea116.Engineering evaluations havealsobeenperformed (seeSection9.4)justifying theexistingundampered ventilation openingsintoadjacentfirezones(1A,1B,64A,64B,44A,44B,"44C,44D,49and69).'or-additional boundarymodifications to'FireZones1Cand1D,seeSection8.1.3.8.5FireArea14Unit1Transformer Room8.5.1ConduitandCableTraProtection Noneproposed8.5.2SuressionandDetection Anautomatic firedetection systemwillbeinstalled inthezoneproviding remotealarmstotheControlRoom.Thismodification isrequiredtosupporttheexemption requestinSection7.3ofthisreport,fromthefixedsuppression criteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasprovidedwithalternate shutdowncapability alsobeprotected byadetection andfixedsuppression system.8.5.3BoundarEvaluations Anengineering evaluation hasbeenperformed

-justifying theunrated,field-fabricated HVACdampertoFireZone13(seeSection9.7).Continued onPage8-12APage8-12 8.5AFireArea15Unit1DieselGenerator Room8.SA.lConduitandCableTraProtection Thefollowing conduitsoftheredtrainwillbeprovidedwithafireprotection barrierequivalent toathree-hour rating:8003R-1,8004R-l,8048R-l,.

8503R-l,and8504R-1.Table8-1providesalistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseraceways, andtheirassociated components.

Theconduitsarebeingprotected inorder'toensurecompliance withAppendixR,SectionIII.G.2(a).

8.5A.2SuressionandDetection Noneproposed8.5A.3BoundarModifications/Evaluations NoneproposedContinued onPage8-13Page8-12A e

8.6FireArea17CAuxiliarFeedwater PumCorridor8.6.1ConduitandCableTraProtection Thefollowing conduitsoftheredtrainUnit1AFWpump(1PP-3W)willbeprovidedwithafireprotection barrierequivalent toaone-hourrating:9875R-1,9874R-1,9747R-1and9748R-1.Thefollowing conduitsfortheredtrainUnit2AFWpump(2PP-3W)willbeprovidedwithsimilarprotection:

8788R-2,8789R-2,9747R-2,and9748R-2.Table8-1providesalistbyfire.zoneofthewrappedraceways, thecablesofconcernwithinthoseracewaysandtheirassociated components.

Theconduitsarebeingprotected inordertoensurecompliance withAppendixR,SectionIII.G.2(c).

Inaddition, detection andsuppression arerequiredforthefirearea.8.6.2SuressionandDetection Theexistingautomatic wetpipesprinkler systemintheUnit2Turbine-Driven FeedPumpRoomwillbeextendedtoprovideareacoveragetoFireArea.17Csoastoensurecompliance withAppendixR,SectionIII.G.2(c).

Thefir'eareawillbeequippedwithanautomatic detection IsystemthatprovidesalarmsintheControlRoomsoastoensurecompliance withAppendixR,SectionIII.G.2(c).

8.6AFireArea19Unit2DieselGenerator Room8.6A.lConduitandCableTraProtection Thefollowing greentrainconduitswillbeprovidedwithafireprotection barrierequivalent toathree-hour rating:Page8-13 8001G-2,8003G-2,8004G-2,8007G-2,8048G-2,8544G-2,and8545G-2.Table8-1providesalistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseraceways, andtheirassociated components.

Theconduitsarebeingprotected inordertoensurecompliance withAppendixR,SectionIII.G.2(a).

>8;6A.2SuressionandDetection.

Noneproposed.

8.6A.3BoundarModifications/Evaluations Noneproposed8.7FireArea20Unit2Transformer Room,8.7.1ConduitandCableTraProtection Noneproposedi8.7.2SuressionandDetection Theareawillbeequipped.

withanautomatic firedetection

,systemthatprovides,alarmsintheControlRoom.Thismodification isrequired.tosupporttheexemption requestinSection7.4ofthisreportfromthefixedsuppression criteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternate shutdowncapability alsobeprotected byadetection andfixedsuppression system.8.7.3BoundarEvaluations Anengineering evaluation hasbeenperformed justifying theunrated,fieldfabricated HVACdampertoFireZone21'(seeSection9.8).Page8-14 8.8FireArea22Unit2Quadrant2PiinTunnel~~8,.8.1ConduitandCableTraProtection Noneproposed8.8.2SuressionandDetection Noneproposed8.8.3BoundarModifications/Evaluations Anengineering evaluation hasbeenperformed (seeSection9.4)requiring three-hour fire-rated damperstobeinstalled intheHVACpenetrations toFireZones63A,63Band63C.Inaddition, theunsealedpenetrations toFireZones63A,63B,63C(seeSection9.4)and34Bwillbesealedwitharatingatleastequivalent totheboundary.

Bothsetsofmodifications arerequiredinordertoensure,the.integrity ofboundaries betweenseparatefireareas.SeeSeismicGapExemption RequestSectio'n7.14forjustifying the'nsealed'eismic gapto'FireZone34B-.SeeSection9.24forjustification ofthemanwayopeningfromthetrenchinFireArea22toFireArea117.Engineering evaluations havealsobeenperformed (seeSection9.4)justifying

'heexistingunsealedHVACpenetration toFireZoneslE,1F,65A,65B,44E,44F,44G,44H,50and69.Foradditional boundarymodifications toFireZones1Gand1H,seeSection8.1.3.8.9FireZone29(A,B,E)

Unit1ESWPumAreaIncludintheMCCs8.9.1ConduitandCableTraProtection NoneproposedPage8-15 8.9.2SuressionandDetection Thefirezonewillbeequippedwithanautomatic detection systemproviding alarmsin,theControlRoom.Thismodification isrequiredtosupporttheexemption requestinSection7.5oft'hisreportfromthefixedsuppression criteriaofAppendixR,SectionIII.G.3..'..

Section.III..G.3requires'that.areasorzonesp'rovided withalternate shutdowncapability alsobeprotected bya.detection andfixedsuppression system.8.9.3BoundarModifications/Evaluations Thepenetrations'in thewallseparating Fir'e'Zones.-29A=and 29BfromFireZones29Cand,'9Dwillbeupgradedtoathree-hour fire,rating.~Thismodification isrequired'o'separate redundant safeshutdowncomponents.

thatarelocatedin.thesame.f.irearea.per-'the criteriaofAppendixR,.Section III.G.2(a).

'-Inaddition,'it

'srequired'-to'supportthefixedsuppression e'xemption requestin'Section 7.5ofthis-report.

Anengineering evaluation hasbeenperformed (see-Section9..25)justifying theundampered HVACpenetrations locatedintheceilingofFireZones29Aand29B,thescreenmeshsecurityaccessgatesproviding accesstothezonesfromFireZone142,andtheopenstairwayfromFireZone29BtoFireZone29G.8.10FireZone29(C,D,F)Unit2ESWPumAreaIncludintheMCCRoom8.10.1ConduitandCableTraProtection NoneproposedPage8-16.

8.10.2SuressionandDetection Thefirezonewillbeequippedwithanautomatic detection systemthatprovidesalarmsintheControlRoom..modification isrequiredtosupporttheexemption requestinSection7.6ofthisreportfromthefixedsuppression criteriaofAppendixR,Section'III.G.3.

SectionIII.G.3requires, thatareasorzones'rovidedwithalternate

'shutdown capability alsobeprotected byadetection andfixedsuppression system.8.10.3BoundarModifications/Evaluations Engineering evaluations" havebeen,performed (seeSection9.25).justifying theunratedhatchlocatedbetweentheflooroXFireZone29Candthe,ceilingofFire.Zone29G;andthescreenmesh'.security accessgates.providing accesstothezonesfromFireZone-.142.

In,addition, Section9.25provides'justification forrequiring three-hour-rated fire.damperstobeinstalled intheHVACpenetrations located,.in the-ceilingofFireZones29Cand29D,'.along withthesealingofopenpenetrations inthebarrier.Thismodification isrequiredtoseparateredundant safeshutdowncomponents thatarelocatedinthesamefireareaperthecriteriaofAppendix-R,SectionIII.G.2(a).

Inaddition:,

itisrequiredtosupportthefixedsuppression exemption requestinSection7.6ofthisreport.Foradditional boundarymodifications toFireZones29Aand29B,refertoSection8.9.3.Page8-17 8.11FireZone29GUnit1andUnit2Screenhouse AuxiliarMCCRoom8.11.1ConduitandCableTraProtection Thefollowing conduitsandassociated pullboxeswillbeprovidedwithfireprotection barriersequivalent toaone-hourrating:JaPullBox¹1and8626G-l,8627G-l,8628G-1,8629G-1PullBox¹2and8624R-l,8624R-2,8618R-l,8619R-1,8620R-l PullBox¹3and8618R-2,8619R-2,8620R-2,8996R-2,8996R-1PullBox¹4and8977G-2,9987G-2,8629G-2,8628G-2,8627G-2Thefollowing conduitsforthepowersuppliestothefourESWpumps,willbe-'rovided withfireprotection barriersIequivalent to*aone-hour'ating:&004R-l,'004G-1, 8004G-2,8004R-2and9232G-1forvalveWMO-701.Table8-1providesalistlbyfire,zone.ofthe'rapped

raceways, thecablesofconcern'Iwithinthoseracewaysand'heir'ssociated components.

Theconduitsarebeingprotected inordertosupporttheexemption inSection7.7ofthisreportfromtheautomatic suppression criteriaofAppendixR,SectionIII.G.2(c).

SectionIII.G.2(c) requiresatleastonetrainofredundant safeshutdownequipment orcableslocatedinthesamefireareabeprovidedwithonehourprotection.

Inaddition, suppression anddetection arerequiredforthezone.Page8-18 8.11.2SuressionandDetection

~~~~~Thefirezonewillbeequippedwithanautomatic detection systemproviding alarmsintheControlRoomtosupporttheautomatic suppression exemption requestinSection7.7ofthisreport.8.11.3BoundarModifications/Evaluations Anengineering evaluation hasbeen,performed justifying theunratedhatchlocatedintheceilingofFireZone29GtoFireZone29Candtheopenstairwayto29B.(SeeSection9.25.)8.12FireArea33,33A,33B and105Unit1EastMainSteamValveEnclosure, MannSteamPxznArea,WestNESWValveArea,andContractor AccessControlBuxldin8.12.1ConduitandCableTraProtection Noneproposed8.12.2.SuressionandDetection FireZones33,33Aand33Bwillbeprovidedwithanautomatic detection systemthatprovidesalarmsintheControlRoom.Thismodification isrequiredtosupporttheexemption requestinSection7.8ofthisreportfromthefixedsuppression criteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternate shutdowncapability alsobeprotected byadetection andfixedsuppression system.8.12.3BoundarModifications/Evaluations Athree-hour fire-rated damperwasprovidedforthegrateinthefloortoFireArea8belowpriortoMarch1983inordertoPage8-19 ensuretheintegrity ofboundaries betweenseparatefireareas.RefertoSection8.4.3foradditional boundarymodification toFireArea12.SeeSeismicGapExemption RequestSection7.14forjustifying theunsealedseismicgaptoFireArea12.SeeSection9;23forjustification oftheunprotected openingtoFireArea1'16.Refer"toSection9.29forboundaryeva'luation

'andconsolidation ofFireZone'05intothefireareacontaining FireZones33,33Aand33B.SeeSection9.35forjustification oftheundampered andunsealedpipepenetrations fromFireZone33AtoFireZone108.8.13FireArea34,34A34BUnit2EastMainSteamValveEnclosure, MainSteamPiinArea,andWestNESWValveArea8.13.1'onduitandCableTraProtection Noneproposed.

8".13.2;Suressionand'Detection'he fireareawillbeprovidedwithanautomatic detection systemthatprovidesalarmsintheControlRoom.Thismodification isrequiredtosupporttheexemption requestinSection7.9ofthisreportfromthefixedsuppression criteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternate shutdowncapability alsobeprotected byadetection andfixedsuppression system.8.13.3BoundarModifications/Evaluations A-'three-hour fire-rated damperwasprovidedforthegrateinthefloortoFireArea26belowpriortoMarch1983inordertoPage8-20 ensuretheintegrity ofboundaries betweenseparatefireareas.RefertoSection8.8.3for,additional boundarymodification toFireArea22.SeeSeismicGapExemption RequestSection7.14forjustifying theunsealedseismicgaptoFireArea22.SeeSection9.24forjustification oftheunprotected openingofFireArea117.SeeSection9.36forjustification oftheundampered andunsealedpipepenetrations from'Fire Zones34AtoFireZone109,,:8.14FireArea40(AandB)Unit14kVSwitchearRoomsandFireArea41Unit1ESSandMCCRooms8.14.1ConduitandCableTraProtection Noneproposed8.14.2SuressionandDetection Noneproposed8.14.3'oundarEvaluations Engineering evaluations havebeenperformed justifying theexistence ofunratedhatchesfromFireZone40BandFireArea41up.toFireArea55.SeeSections9.15and.9.16.

8..15FireZone43AccessControlArea8.,15.1ConduitandCableTraProtection Noneproposed8.15.2SuressionandDetection Noneroosed8.15.3BoundarEvaluations

\Engineering evaluations havebeenperformed tojustifytheexistence oftheunratedhatchtoFireArea56(seeSection9.14),unrateddoorstoFireZone110(seeSection9.21),andPage8-21 unprotected openingtoFireZone91(seeSection9.1).RefertoSection9.10forboundaryevaluation andconsolidation ofFireZone43intothefireareacontaining FireZones37,44N,44S,44Athrough44H.8.16FireZones44Nand44SAuxiliarBuildinComonentCoolinWaterSstemAreaElevation 609ft8.16.1ConduitandCableTraProtection Fireprotection barriershavinganequivalent ofone-hourfireratingwillbeprovidedforthefollowing:

2AZ-C58and9152R-2forUnit2ESW(WMO-738);

8344G-2and8333G-2forUnit2EPS(DGCD);2A-C3,2A-C6and2AI-C24forUnit2AFW(2PP-3E);

lAZ-C20forUnit1AFW(1PP-3-E);

2AZ-C58(previously noted)forUnit2CVCS(PP-50W[LO]).

Table8-1provides.alistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseracewaysandtheirassociated components.

TheconduitsarebeingAprotected toensurecompliance withthecriteriaofAppendixR,'SectionIII.G.2(c),

whichrequiresthatatleastonetrainofredundant

'safeshutdownequipment orcables=locatedinthesamefireareabeprovidedwithonehourprotection.

Inaddition, detection andsuppression arerequiredforthefirearea.Theopencabletraystraversing thezonefromthenorthsidetothesouthsidewill.beappropriately fire-stopped topreventfirepropagation fromonesectionofthefirezonetotheother.Thismodification isrequiredtoensurecompliance withthecriteriaofAppendixR,SectionIII.G.2(b),

whichrequiresaPage8-22

~~minimumof20ftofhorizontal separation withoutintervening

'combustibles betweenredundant safeshutdownequipment orcableslocatedinthesamefirearea.Inaddition, detection andsuppression arerequiredforthefirearea.8.16.2SuressionandDetection Theexistingautomatic

'rypilotsprinkler systemwillbeextendedintothefarnorthsectionofFireZone44Natelevation 620ft6in.,bytheentrances toFireZone43,inthevicinityoftheCCWpumps,andbythemonitortankstoprovidetotalareacoverageinthenormallyaccessible areas.Thismodification isrequiredtoensurecompliance withthecriteriaofAppendixR,SectionsIII.G.2(b) andIII.G.2(c).

Intheimmediate vicinityofthecomponent coolingwaterpumps,theextendedsuppression systemwillprovideenhancedcoverageforprotection oftheCCWpumpsbypayingparticular attention to'pacingandsprinkler headlocation.

Thedesignofthesystem'willprovideaddedassurance thatthesuppression systemwillpreventanydamagetoCCWpumpsastheresultofafire.Inaddition, twoionization smokedetectors willbelocatedatceilinglevelinthevicinityoftheCCWpumps.Theextendedsuppression systemwillalsoprovidecoveragearoundtheperimeter ofthethreestairwayopeningsleadinguptoadjacentFireZones51and52inordertoensuretheintegrity ofboundaries betweenseparatefireareas.Thedetection andsuppression systemmodifications arerequiredtosupportthe"exemption inSection7.10ofthisreportwithPage8-23 respecttoseparation ofredundant CCWpumpslocatedinthesamefirearea.8.16.3BoundarModifications/Evaluations Thepenetrations, fromFireZones44Nand44StoFireZone52willbesealedtothe-equivalent ratingoftheconcreteslabinordertoensuretheintegrity ofboundaries'etween separatefireareas.TheAuxiliary

.BuildingHVACductexemption presented inSection7.13providesjustification fortheundampered ductspenetrating throughthefloorandceilingofFireZones44Nand44S.'U~~TheareaoftheCCWpumpswillbeprovidedwithasteelskJ'onstruction, firebarrierthatiscoated.with'subliming material..to belocated betweentheUnit.1and2pumps.The'irebarrierwillalsobeextendedbetweentheexistingsparepumpandtheUnit1,east'.pump',',

thusproviding aphysicalseparation ofCCWpumpstoensuretheavailability ofatleasttwoofthefouroperational pumpsperthecriteriaof,Appendix, R,SectionIII.G.2(a).

Anengineering evaluation hasbeenperformed (seeSection9.3)justifying theconfiguration ofthebarrierseparating theit'nit1and2CCWpumpsandtheundampered commonventilation ductsoverthepumps.Section9.3alsorequiresthatafire-rateddamperbeaddedtotheHVACshaftwhereitpenetrates intoFireZone52aboveinordertoensuretheintegrity ofboundaries betweenseparatefireareas.Foradditional boundaryPage8-24 modifications toFireZones5,6N,and6S,seeSections8.2.3and~~8.3.3.Forboundaryevaluation betweenFireZones43and44N,seeSection9.10.Section9.6presentsthe601-ftpipetunnelevaluation.'his evaluation justifies theunratedboundarybarriersbetweenFireZone6AandFireZones44Nand44S.Anengineering evaluation hasbeenperformed (seeSection9.22)justifying theunrateddoorsbetweenFireZones44Sand111.8.17FireArea47(A..and B)Unit24kVSwitchearRoomsandFireArea45Unit2ESSandMCCRooms8.17.1ConduitandCableTraProtection Noneproposed8.17.2SuressionandDetection" Noneproposed8.17.3BoundarModifications/Evaluations Engineering evaluations havebeenperformed tojustifythe'existence"o'f"'unrat'ed hatchesfromFireArea-45andFireArea47BtoFireArea60.SeeSections9.19and9.20.8.18FireZones49and50Unit1andUnit2HVACVestibule 8.18.1ConduitandCableTraProtection Noneproposed8.18.2SuressionandDetection NoneproposedPage8-25 8.18.3BoundarModifications/Evaluations Engineering evaluations havebeenperformed combining thefireareacontaining FireZones49and50withthefireareathatcontained FireZones.3,32,36,48and69(seeSection9.9)alongwithFireAreas31,35,106,107and146(seeSection9.30).'Theseismicgapexemption presented inSection7.14providesjustification fortheunsealedseismicgapcommunicating withFireZones33B,69and108forUnit1,andFireZones34B,69and109forUnit2.8.19FireZones51and52EastandWestEndofAuxiliarBuildinElevation 633ft8.19.1ConduitandCableTraProtection Noneproposed8.19.2SuressionandDetection Thefirezoneswillbeprovidedwithanautomatic drypilotreactionsprinkler systemthatwillincludeprotection aroundthettperimeter ofthestairwell openingsleadinguptoadjacentFireZone69andthenormallyaccessible areaswithinFireZones51and52.Thesemodifications arerequiredtoensurecompliance withAppendixR,SectionsIII.G.2(b) andIII.G.2(c),

andalsotoensuretheintegrity ofboundaries betweenseparatefireareas.8.19.3BoundarModifications/Evaluations Anengineering evaluation hasbeenperformed justifying theexistence oftheunratedhatchleadingtoFireArea59(seeSection9.18).Page8-26 RefertoSection9.9fortheevaluation of.combining thefireareacontaining FireZones51and52withthefireareathatcontained FireZones3,32,36,48and69.Inaddition, Section9.30presentstheevaluation combining, theabove-mentioned, fireareawithFireAreas31,35,106,107and146.Foradditional boundarymodifications to'enetration seals)andfiredamperstoFireZones44Nand44S,refertoSection8.16.3.8.20FireArea53Unit1ControlRoom8.20.1,ConduitandtCableTraProtection Nonepropos'ed

/8.20.2SuressionandDetection 4Noneproposed8.20.3BoundarModifications/Evaluations TheUnit2hotshutdownpanel(FireZone145)willbeprovidedwithafireprotection barrierhavingarating,equivalent tothreehours.Thebarrierwillbedesignedtoprovideaccesstothepanelforitsintendedusewhilestillservingasathree-hour fireprotection barrier.Thismodification isrequiredtoseparateredundant/alternate safeshutdowncomponents originally locatedinthesamefirearea.Asaresultofthismodification, FireZone145willbelocatedinafireareaseparatefromFireArea53.Thedoorconnecting toFireArea54willbeupgradedtoathree-hour rating.Thismodification isrequiredtoensurethePage8-27 integrity ofboundaries betweenseparatefireareas.Engineering evaluations havebeenperformed justifying theunratedhatchtoFireZone57(seeSection9.13)andtheunratedhatchtoFireZone70(seeSection9.5).8.21FireArea54Unit2ControlRoom8.21.1'onduitandCableTraProtection Noneproposed.8.21.2SuressionandDetection Noneproposed8;..21.3BoundarModifications/Evaluations TheUnit1hotshutdownpanel(FireZone144)willbeprovided.withafireprotection

.barrierhavingaratingequivalent tothreehours.The,barrier.will'edesignedtoprovide,.access tothe,panelforitsintendeduse.while stills'erving;as.athree-hour fireprotection

'arrier.Thismodification isrequiredtoseparateredundant/alternate safeshutdowncomponents originally locatedinthee;same firearea.Asaresultofthismodification, FireZone144willbelocatedinafireareaseparatefromFireArea54.Thedoorconnecting toFireArea53willbeupgradedtoathree-hour rating.Thismodification isrequiredinordertoensuretheintegrity ofboundaries betweenseparatefireareas.Engineering evaluations havebeenperformed justifying theunratedhatchtoFireZone58(seeSection9.17),theunratedhatchtoFireZone73(seeSection9.5),andtheundampered HVACventilation ducttoFireZone73(seeSection9.2).Page8-28 8.22FireZone57Unit1ControlRoomCableVault8.22.1ConduitandCableTraProtection Noneproposed8.22.2SuressionandDetection

,Noneproposed8.22.3BoundarModifications/Evaluations Anengineering evaluation hasbeenperformed tojustifytheexistence oftheunratedhatchfromFireArea53toFireZone57.(SeeSection9.13.)8.23FireZone58Unit2ControlRoomCableVault8.23.1ConduitandCableTraProtection Noneproposed8.23.2SuressionandDetection Noneproposed8.23.3,,BoundarModifications/Evaluations Anengineering evaluation hasbeenperformed tojustifythe,existence oftheunratedhatchfromFireArea54toFireZone58(seeSection9.17).8.24FireArea62(A,B,C)

Unit1CharinPumAreaandFireArea63A,B,CUnit2CharinPumArea8.24.1ConduitandCableTraProtection Noneproposed8.24.2SuressionandDetection NoneproposedPage8-29 8.24.3BoundarModifications ltTheopening(2ftx4ft)inthewalltoFireZone5willbeprovidedwithadamperhavinganequivalent fireratingofthreehours.Thepenetrations toFireZones5,6A,12and22willbesealedtoanequivalent ratingoftheconcretewall.Thesemodif*ications arerequiredin-ordertoensuretheintegrity ofboundaries, betweenseparatefireareas.BothaccesscontrolgatesfromFireZone5willbereplacedwiththree-hour-rated firedoorsthatwillbenormallyheldopenbyfusiblelinksforventilation purposes.

Thismodificatio'n isrequiredinorderto"ensuretheintegrity ofboundaries betweenseparatefireareas.SeeSections8.4.3(Unit')and8.8.3(Unit2)foradditional boundary',modifications toFireAreas12and22.8,.25FireZone"79Unit1TurbineRoomBetweentheUnit1EmerencDiesels8.25.1ConduitandCableTraProtection Thecabletray1AZ-C34containing Unit1greendivisionsafeshutdownsystemscableswillbeprovidedwithafireprotection barrierhavingaratingequivalent toonehour.Table8-1providesalistbyfirezoneofthewrappedraceways, thecablesofconcernwithinthoseracewaysandtheirassociated components.

Thismodification isrequiredinordertoensurecompliance withAppendixR,SectionIII.G.2(c),

whichrequiresatleastonetrainofredundant safeshutdownequipment orcableslocatedinthePage8-30 samefireareatobeprovidedwithonehourprotection.

Inaddition, detection andsuppression arerequiredforthefirearea.8.25.2SuressionandDetection Theexistingwetpipesprinkler suppression systeminFireZone79wi'llbeextendedtoinclude.theramp/corridor areabetweentheUnit1EDGs.A,detection system,willbeaddedthatprovidesalarmsintheControlRoom.Thesemodifications arerequiredtoensurecompliance withthecriteriaofAppendixR,SectionIII.G.2(c).>~

8.25.3BoundarModifications Noneproposed8.26FireZone.85Unit2TurbineRoomBetweentheUnit2EmerencDxesels8.26.1Co'nduitandCableTra'Protection Thecabletrays.2AZ-C55,2E-C9,2E-C10and2AZ-C99'ontaining greendivisionsafeshutdownsystemcableswillbeprovided>>'ithafireprotection barrierhavingaratingequivalent toonehour.Table8-1providesalistbyfirezoneofthewrappedraceways,

'thecablesofconcernwithinthoseracewaysandtheirassociated components.

Thismodification isrequiredtoensurecompliance withthecriteriaofAppendixR,SectionIII.G.2(c).

SectionIII.G.2(c) requiresthatatleastonetrainofredundant safeshutdownequipment orcableslocatedinthesamefireareabeprovidedwithonehourprotection.

InPage8-31

addition, detection andsuppression

'arerequiredinthisfirearea.8.26.2SuressionandDetection Theexistingwetpipesprinkler systeminFireZone85willbeextendedtoincludetheramp/corridor areabetweentheUnit2EDGs.'detection systemwillbeaddedthatprovidesalarmsintheControlRoom.Thesemodifications arerequiredtoensurecompliance withthecriteriaofAppendixR,SectionIII.G.2(c).

8.26.3BoundarModifications Noneproposed8.27FireZone122Unit1Containment Instrument Roomevelindication Also,thetraysstopped.Thesemodifications arerequiredinordertoensurecompliance withAppendixR,SectionIII.G.Q(f) andIII.G.2(d) respectively.

8.27.2SuressionandDetection 8,.27.1Conduit andCableTraProtection

'Atleastone'channelofpressurizer-liquid 1lwillbeprotected witharadiantenergyshield.thatareintervening'combustibles

,betweenchannelswillbe.fire-Proposedmodification withdrawn bysupplement tothisreportdatedAugust1983.8.27.3BoundarModifications Noneproposed8.28FireZone123Unit2Containment Instrument RoomFireZone123willbeprovidedwiththesamemodifications asFireZone122inUnit1.Page8-32 8.29FireZones66,74Units1and2Containment PiinAnnulus,.

FireZones67,75Units1and2.LowerVolumeFireZones120,121Units1and2Containment Accumulator Enclosure 8.29.1ConduitandCableTraProtection Noneproposed8.29.2SuressionandDetection Proposedmodification withdrawn bysupplement tothisreport,datedAugust1983.8.29.3BoundarModifications NoneproposedAlternative ShutdownModifications Themodifications discussed inthis,sectionarethosespecifically associated withthealternate shutdowncapability o'theplant.Thesemodifications arerequiredtoachieveoperability oftheAlternate Shutdown; Sy'temincompliance wit%10CFR50AppendixRSectionIII.G.3.8.30ChemicalandVolumeControlSstem(CVCS)Installation'of apermanent 4-in.cross-tie betweentheCVCSsystemsofUnits1and2.Thismodification isrequiredtoprovidechargingcapability forthosealternate shutdownfireareaswheretheunitspecificchargingpumpshavebeendisabled; RefertoSection5.5.1,PAIDFigure5.5andproposedphysicalarrangement inFigure5.11.Page8-33 8."31ProcessMonitorin Sstem8'.31.1ReowerinofExistinLSIPanelsProvidealternative 120Vacpowerfromtheunaffected unit'semergency powersources.Thismodification isrequiredtoprovideacpowerfor,processmonitoring instrumentation independent ofthosefire',areaswhereoneunit'sacpowerislost.RefertoSection5.5.2,theone-linediagramsinFigures5.12.1and5.12.2andtheelectrical schematic showninFigure5.13.8.31.2SteamGenerator Pr'essure forLSIPanelsInstallation oflocalpressureindication forsteamgenerators 1and4at,panel-LSI-5 andsteamgenerators

'2and3atpanelLSI-6.,Thesignalswillalsobetransmitted toanewlocalshutdownpanelLSI-4.This.modification isrequiredtoprovidesteamgenerator pressureindication forthosefireareaswhereControlRoomindication hasbeenlost.8.31.3SourceRaneMoni:torin atLSIPanelsAnewsourcerangemonitoring channelwillbeinstalled withlocalindication atanewlocalshutdownpanelLSI-4.Thismodification isrequiredto,providesourcerangeindication forthosefireareas;whereControlRoomindication hasbeenlost.RefertoSection5.5.8andFigure5.20fortheproposeddesign.8.31.4Centralized ControlPanelLSI-4Providelocalindication forRCStemperature hotandcoldlegs,steamgenerator

pressure, steamgenerator levelandsourcePage8-34 rangemonitoring onnewlocalshutdownpanelLSI-4.Inaddition, panelsLSI-3andLSI-4willbeprovidedwiththecapability ofbeingpoweredfromtheunaffected unit'sEPS.Thismodification isrequiredtoprovideprocessmonitoring indication forthosefireareaswhereControlRoomindication.has beenlost.RefertoSection5.5.9.8.31.5ThandTcforLSIPanelsHotleg(Th)andcoldleg(Tc)temperature information willbeprovidedatpanels.LSI-5,LSI-6andLSI-4.ThandTcforRCSloops1and-4-will

<beavailable, atLSI-5andLSI-4.ThandTcforRCSloops2and3'willbeavailable atLSI-6andLSI-4.Thismodification isrequiredtoprovideTh.and,Tcindication forthosefireareaswhexeControl.Roomindication has.been, lost.RefertoSection5.5.6.8.32ESWSstem8.32.1ESWPumCircuitModifications Addisolation relaystothecircuitsthatstarttheESWpumpsfromthedischarge headerpressureswitchesaswellasfromtheoppositeunit'sSafetyInjection (SI)signal.Also,,rel'ocate'he redundant ESWpumpbreakercontrolsandtheirassociated cables,whichpresently existforthesepumpsinthealternate unit'sControlRoom,totheirownunit'shotshutdownpanel.Inaddition, thesecondESWpump'sbreaker'ontrol circuitry andassociated cablesinthealternate unit'shotshutdownpanelwillberemoved.Thesemodifications arePage8-35 requiredtoensurethattheunaffected unitsESWpumpswillbeavailable.

RefertoSection5.5.3.8.32.2ESWStrainerandValveCircuitModifications Modifications, similartothosedescribed fortheESWpumpin8.32'.labove,willbeprovidedfortheESWpumpdischarge v'alves,strainers andheadercross-tie'alves.

RefertoSection5.5.4.8.32.3CCWPumCircuitModifications Provideisolation ofCCWpumppressureswitchandassociated cablingwithisolation relaysidentical to"themethodproposedfortheESWpumppressureswitches.

Thismodification isrequiredtoensurethattheunaffected

.unit'sCCWpumpswillbeavailable.

RefertoSection5.5.5.8.32.4EmerencPowerSstem(EPS)Installa480VMCC'ineachunitthatwillbepoweredbytheEPSsystemoftheoppositeunit.TheseMCCswillbeusedtoprovidealternate shutdowncapability for-.therepowering ofthebackuppressurizer heaters(anythreebanksofheaters)fromtheoppositeunit.Thisemergency powersystemwillbeinstalled usingaD.C.Cookplantrepairprocedure.

Thismodification isnotrequiredtocomplywithl0CFR50AppendixR.Thismodification providesaddedoperatorflexibility forcontrolling cooldownanddepressurization.

Page8-36 TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIREZONEFIREZONEUNITRACEWAYSYSTEMCABLEICOMPONENT 6N6M.6M6M6M6M.6M6M6M8003R-18003R-2lAZ-C501AZ-C461AZ-P88026R-18506R-18155G-28505R-12AZ-C802A-C142A-C152AZ-C602AZ-C582AZ-C599747R-29748R-2RHRRHRCVCSCVCSCVCSCVCSEPSEPSEPSAFWAFWAFWAFWAFWAFWAFW"AFW8003R-18003R-28031R-18890R-18031R-18890R-18026R-18026R-1'506R-1 8155G-28505R-19747R-29748R-29747R-29748R-28786R-28786R-29767R-29747R-29748R-28786R-29747R-29748R-21PP-35W2PP-35WIMO-911PP-50W(LO)

IMO-911PP-50W(LO)

IMO-911IMO-911lAB12CD2lAB2FMO-212FMO-242FMO-212'MO-242 FRV-247FRV-.2472PP-3WFMO-212FMO-242FRV-247FMO-212FMO-242.T/AEP/8-1, P188PAGE1 IVtip\4[I-t5 TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIREZONEFIREZONEUNIT6S,M6M6M6S,M6M6M,S6M6M6M6M6M6M6M6N6MRACEWAY.8744R-28786R-29767R-22AZ-C582AZ-C752AZ-C622AZ-C868154G-21A-P201A-C551AZ-P91AZ-P81AZ-C541AZ-C56lAZ-C50SYSTEMAFWAFWAFWCVCSCVCSCVCSCVCSEPSCVCSCVCSCVCSCVCSCVCSCVCSCVCSCABLE8744R-28786R-29767R-28912R-28890R-28912R-28890R-28890R-28154G-28026R-18031R-18026R-18026R-18031R-18890R-18031R-18890R-1IICOMPONENT IIIII2PP-3WIIFRV-247I2PP-3WIIPP-50W(LO)

IPP-50W(LO)

PP-50W(LO)

PP-50W(LO)

PP-50W(LO) 2CD1IMO-911IMO-911IMO-911IMO-911IMO-911PP-50W(LO)

IMO-911PP-50W(LO) 15RefertoPage7of"thistableI17C17C.17C17C17C17C29747R-19874R-19875R-19748R-18788R-28789R-2AFWAFWAFWAFWAFWAFW9747R-19874R-19875R-19875R-19748R-18789R-28788R-28789R-2FMO-212FMO-242FMO-212FMO-212FMO-242FMO-242FMO-212FMO-242T/AEP/8-1, P188PAGE2 TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIRE'ZONEFIREZONEUNITRACEWAYSYSTEM.CABLECOMPONENT 17C17C1919191919191929G29G29G29G29G29G29G29G29G29G.29G29G29G=-29747R-29748R-28001G-28003G-28004G-28007G-28048G-28544G-28545G-28626G-18627G-18628G-18629G-18624R-18624R-28618R-18619R-18620R-18618R-28619R-28620R-28996R-2AFWAFWAFWRHRESWCVCSEPSEPSEPSESWESWESWESWESWESWESWESWESWESWESWESWESW9747R-29748R-28001G-28003G-28004G-28007G-28048G-28544G-28545G-28626G-1'8627G-18628G-18629G-18624R-18624R-28618R-18619R-18620R-18618R-28619R-28620R-28996R-2FMO-212FMO-2422PP-3E2PP-35E2PP-7E2PP-50EAB-DABD-C.ABD-DWMO-701ESWSEESWSEESWSEWMO-702WMO-702ESWSWESWSWESWSWESWSWESWSWESWSWWMO-704T/AEP/8-1, P188PAGE3 QtI' TABLE8-1"'WR'APPED'RACEWAYS/CABLES BYFIRE"ZONEFIREZONEUNITRACEWAYSYSTEMCABLECOMPONENT

'9G29G29G29G29G29G29G29G29G29G29G44N44S,N44S44N44N44N44N44N'22"8996R-18977G-29987G-28629G-28628G-28627G-2I:8004R-1 8004G-18004G-28004R-29232G-12AZ-C589152R-28344G-28333G-22A-C32A-C62AI-C241AZ-C202AZ-C58ESWESWESWESWESWESWESWESWESWESWESWESWESWEPSEPSAFWAFWAFWAFWCVCS8996R-18977G-29987G-28629G-28628G-28627G-2.8004R-18004G-18004G-28004R-29232G-19152R-29152R-28344G-28333G-28131G-29763G-28131G-29763G-28131G-29763G-29834G-18912R-2WMO-704WMO-703WMO-703ESWSEESWSEESWSE1PP-7W1PP-7E2PP-7E2PP-'7WWMO-701WMO-738WMO-738DGCDDGCDFRV-2572PP-3EFRV-2572PP-3EFRV-2572PP-3E1PP-3EPP-50W(LO)

T/AEP/8-1, P188PAGE4 Will/4AL/hq TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIRE'ZONEFIREZONEUNITRACEWAYSYSTEMCABLECOMPONENT 7985851AZ-C342AZ-C552AZ-C99EPSESWEPS.ESWCCWCVCSRHRESWAFWEPSESWCCWRHREPSAFWEPS8095G-18098G-18333G-18338G-1I8339G-18340G-18343G-18344G-18345G-18346G-18347G-18348G-18349G-18400G-18409G-18410G-18466G-18526G-18527G-18592G-18639G-18789G-18862G-18874G-18889G-18946G-19290G-18095G-28098G-28789G-28862G-28889G-29231G-29290G-28338G-28339G-28340G-28343G-28345G-28346G-28347G-28348G-21CD11CD2DGCDDGCDDGCDDGCDDGCD~DGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDWMO-7251CD11CD2DGCDDGCD1PP-7E1PP-10EPP-50E(LO) 1PP-35EWMO-7071PP-3E2CD12CD22PP-7E2PP-10E2PP-35EDGCD2PP-3EDGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDT/AEP/8-1, P188PAGE5 IIIlt TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIRE'ZONE FIREZONEUNIT0RACEWAYSYSTEMCABLECOMPONENT 85852-2E-C92E-C10ESWEPSCVCSESWEPSESWCCWRHREPSAFWEPSESWEPSCVCSESW8349G-28400G-28409G-28410G-28466G-28526G-28527G-28592G-28639G-28874G-28946G-28095G-28098G-28789G-28862G-28889G-29231G-29290G-28340G-28343G-28345G-28346G-28347G-28348G-28349G-28400G-28409G-28410G-28466G-28526G-28527G-28592G-28639G-28874G-28946G-2DGCDDGCDDGCDDGCDWMO-7262CD12CD2DGCDDGCDPP-50E(LO)

WMO-7082CD12CD22PP-7E2PP-10E2PP-35EDGCD2PP-3EDGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDDGCDWMO-7262CD12CD2DGCDDGCDPP-50E(LO)

WMO-708T/AEP/8-1, P188PAGE6 TABLE8-1WRAPPEDRACEWAYS/CABLES BYFIREZONEFIREZONEUNITRACEWAYSYSTEMICABLECOMPONENT 158003R-18004R-18048R-18503R-18504R-1RHRESWEPSEPSEPS8003R-18004R-18048R-18503R-18504R-1PP-35WPP-7WAB-AABD-AABD-BT/AEP/81gP188PAGE7 9.BOUNDARYEVALUATIONS Thissectionprovidesacompilation offireareaboundaryevaluations whichhavebeenperformed sincetheissuanceoftheMarch1983report.Theseevaluations weredeveloped asaresultofvariousareasofconcernidentified byIndianaandMichiganElectricCompanywithrespecttoAppendixRconformance,.

Insomecases,plantlocations thatwerenotidentified intheMarch1983AppendixRsubmittal havebeencombinedwithadjacentfireareas.Withtheexception oftheUnit1andUnit2hotshutdownpanels(FireZones144and145),theselocations, donotcontainsafeshutdownequipment orcables.Inothercases,evaluations wereperformed tojustifyunratedcomponents offireareaboundaries.

Theevaluations contained inthissectionhavebeenpreparedinaccordance withappropriate NRCguidelines.

Eachevaluation isstructured similartotheexemption requestscontained inSect-ion7ofthisreport.Therearesixmajorsubheadings forleachevaluation.

Theyareidentified asfollows:(1)Purpose,whichidentifies whytheevaluation isbeingperformed; (2)Description, whichidentifies thezone(s)ofconcernanddescribes theunratedportionofthefireareaboundaries; I(3)SafeShutdownEquipment',

whichidentifies safeshutdowncapabilities inthezone(s)ofconcern;(4)FireProtection

'Equipment, whichidentifies theautomatic andmanual-detection andsuppression capabilities inthezone(s)of,concern;Page9-1 (5)FireHazardsAnalysis, whichidentifies andevaluates theimpactofthe-unratedportionofthefireareaboundaryonsafeshutdowncapabiliti'es inthezone(s)ofconcern;and(6)Conclusions, whichsummarizes theproposedmodifications, ifany,andthereasonswhytheunratedportionofthefireareaboundaries doesnotimpactonredundant safeshutdowncapabilities.

Theresultisa.technical evaluation thataddresses theimpactofunratedcomponents offireareaboundaries onredundant safeshutdowncapabilities locatedoneithersideofthefireareaboundaries.

Theboundaryevaluations inthissectioncanbedividedintothefollowing majorcategories:

(1)Boundaryevaluations addressing fieldconstructed fire.dampersorundampered ventilation ductworkinfireareaboundaries (see-Sections9.1through9.4,9.7,9.8,9.25,9.34,9.35,9.36,9.37,9.38,9.40and9.41);(2)Boundaryevaluations addressing unratedhatchesordoorsinfireareaboundaries (seeSections9.5,9.13through9.22,9.25,9.37and9.39);(3)Boundaryevaluations addressing unprotected openingsinfireareaboundaries (seeSections9.6,9.23,9.24,9.25,9.31,9.32,9.33,9.35,9.36and9.37);and(4)Boundaryevaluations whichjustifycombining adjacentfireareasintolargerfireareas(seeSections9.9through9.12,and9.26through9.30).Whiletheevaluations ineachcategoryareallstructured thesame(i.e.,similartotheexemption requests),

thetechnical issueswhichareaddressed differ.Therefore, information thatisimportant toincludeinoneevaluation maynotbeincludedinPage9-2 anevaluation in'different category.

Forexample,combustible loadingsandmethodsofsafeshutdownmustbeconsidered forthefirstthreecategories ofevaluations identified above.Inanumberoftheseevaluations, theactualcombustible loadinginthefirezoneorfireareasislessthanthe,combustible loadinguponwhichtheevaluation isbased.Theactualcombustible loadingisidentified inparentheses.

Thisisdonesuchthatinstalling additional cableorcombustible materials (inminorquantities) willnotvoidthebasesandconclusions oftheevaluations.

However,combustible loadingisnotofrealconcerninevaluations addressing combining fireareasintolargerfireareas.Whatisofmostconcernarethemethodsofsafeshutdown.

Thefollowing boundaryevaluations arecontained inthissection:SectionNo.DescritionPacae9.19.2FireZone43andFireZone91DuctEvaluation FireArea54andFireZone73DuctEvaluation 9-69-109.3CCWPumpAirSupplyDuctEvaluation (FireZone44S)9-1594Auxiliary BuildingVerticalAirShaftsEvaluation (FireAreas12and22)9-219.59.6FireZone70andFireZone73HatchEvaluation 601ftPipeTunnelEvaluation (FireZone6A)9-459-489.79.8FireArea13andFireArea14BoundaryEvaluation 9-62FireArea21andFireArea20BoundaryEvaluation 9-67Page9-3 9.9FireAreaContaining FireZones3,32,36,48and69andFireAreaContaining FireZones49,50,51and52BoundaryEvaluation 9-72.9.10FireArea43andFireZone44NBoundaryEvaluation 9-769.119.129.139.149.15Units1and2TurbineBuilding, MainSteamPipeTunnelsandService/Office BuildingEvaluation TurbineBuildingandScreenHouseBoundaryEvaluation FireArea53andFireArea57HatchEvaluation FireZone43andFireArea56HatchEvaluation FireZone40BandFireArea55HatchEvaluation 9-809-859-889-939-989.16FireArea'41andFireArea55HatchEvaluation.,

  • 9-1039.179.189.199.209.219.229.239.249.259.26FireArea54andFireArea58HatchEvaluation FireZone52andFireArea59HatchEvaluation FireArea45andFireArea60HatchEvaluation FireZone47BandFireArea60HatchEvaluation FireZone110andFireZone43DoorEvaluation FireZone111andFireZone44SDoorEvaluation FireArea116BoundaryEvaluation FireArea11'7BoundaryEvaluation Essential ServiceWaterPumpHouseHatchandFireDamperEvaluation FireArea9andFireArea10BoundaryEvaluation 9-1089-1139-1199-1249-1299-1349-1409-1459-1519-1649.279.28FireArea24andFireArea25BoundaryEvaluation 9-168FireArea61andFireZone5BoundaryEvaluation 9-1729.29FireArea105andFireAreas33,33A,33BBoundaryEvaluation 9-176Page9-4 FireAreaContaining FireZones3,32,36,48,49,50,51,52,69andFireAreas106,107,31,35and146BoundaryEvaluation FireZones62A,62Band62CBoundaryEvaluati'on FireZones63A,63Band63CBoundaryEvaluation FireZone6AtoFireZone138BBoundaryEvaluation FireZone36toFireZone5BoundaryEvaluation 9-1819-1859--1929-1999-204FireZone108toFireZone33ABoundaryEvaluation 9-'210FireZone109toFireZone34ABoundaryEvaluation 9-217FireZone32toFireZone5BoundaryEvaluation FireZone~69toFireZones108and109BoundaryEvaluation FireZone70toFireZone129BoundaryEvaluation FireZone7'toFireZone61BoundaryEvaluation FireZones51and37HVACDuctPenetrations 9-2249-2319-2389-2419-246Page9-5 9.1FireZone43andFireZone91DuctEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactonredundant safe.-shutdown capability ofanundampered HVACsteelduct-thatpenetrates thewallbetweentheAccessControlAreaandthesoutheast portionoftheUnit1TurbineRoom(FireZone43andFireZone91,respectively).

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.DescritionFireZone43islocatedonthe609ftelevation oftheAuxiliary.

Building.

Itispart'f'largerfireareathatincludesFireZones37,.44N,44Sand44Athrough44H.FireZone91ispartofalargerfire.areathatincludestheentiretyoftheTurbineBuilding, alongwith'heMainSteamPipeTunnelsandwestValveHouses.Thebarrierseparating thetwozonesisconstructed.

ofreinforced concretecapableofachieving athree-hourrating;however,anundampered 7-in.diametersteelductpenetrates thewallbetweenthetwozones.SafeShutdownEuimentFireZones,43and'1containcablesrequiredforsafeshutdownofD.C.CookUnit1.Shouldafireoccurineitherofthesezones,alternate shutdowncapability meetingthecriteriaofAppendixRSectionIII.G.3isavailable outsideofFireZone43.Redundant safeshutdowncapability meetingthecriteriaofAppendixRSectionIII.G.2isavailable outsideofFireZone91.Page9-6 FireProtection EuimentAnautomatic ionization detection systemisinstalled belowkthesuspended ceilinginFireZone43.Automatic suppression capability isnotprovidedinFireZone43.FireZone91isprotected byanautomatic wetpipesprinkler system.Automatic detection isnotprovidedcapabilities intheforminFireZone'91.Manualsuppression ofportableextinguishers andhosestationsareavailable for.useinbothfirezones.FireHazardsAnalsisThebarrierseparating FireZone43andFireZone91iscapableofachieving athree-hour firerating;however,a7-in..diametersteelductpenetrating, thisbarrierisnotprovidedwith!afiredamper.Theundampered

.7.-in.diameterHVACsteelductis>locatedin thewallseparating FireZone,43from-FireZone91:.Fora.firetopropagate betweenFireZone43andFireZone91,a-fireofsufficient duration-andintensity would-berequiredto'.challenge theinherent, capabilities ofthesteelductwork.

Section3-3.2.1ofNFPANo.90Arequiresthatapprovedfiredampersshallbeinstalled whereHVACductspenetrate partitions requiredtohaveafireresistance ratingoftwohoursormore.Thecombustible loadinginFireZone43resultsinanequivalent fireseverityofunder60minutes.(Theactualfire'severity.

existingatthistimeisunder56minutes.)

Thecombustible loadinginFireZone91resultsinanequivalent fireseverityofunder40minutes..(Theactual.fireseverityexistingatthis-Page9-7 timeisunder20minutes.)

Assuch,therequiredfire'ratingofthebarrierseparating thetwozonesisunderonehour.Therefore, perthecriteriaofNFPA90A,afiredamperisnotrequiredin.the7-.in.diametersteelductpenetrating thisbarrier.However,asthisbarrierisidentified asaboundaryfirebarrier,furtherjustification isrequiredfornotinstalling afiredamperinthesteelduct.Thefollowing discussion providestheaddi.tional justification Iinstalling thefiredamper:Studiesoftheperformance ofsteel"ducts;::;.

withandwithoutfiredampersunderanASTME-119fire,exposure,.

were'arriedoutinDecember1982atUnderwriters Laboratories, Inc.,bytheThermalInsulation Manufacturers Association.(TIMA).

Twoseparatefiretests...inthewallfurnace=were"conducted onsteel'ucts....'he demonstrated structural performance ofsheetsteelductsinthefiretestprovidedadditional evidenceforNFPA.90Atomaintain"titsprovision that'ofiredampersarerequiredwheresteelductspenetrate wallshavingaone-hourfire,resistance rating....

SteelductsintheTIMAfiretests,under.positive-pressure fire-test conditions, remainedintactonbothsides(thefireexposedandunexposed side)ofthewall.Bymaintaining itsstructural integrity intheone-hour-rated partition opening,thesteelductactedasafirestopagainstthepassageofflamesandhotgasesforonehour--with orwithoutfiredampers...

Steelductswithoutafiredamperprovidethesamefireprotection asUnderwriters Laboratories labeledfiredampers,firedoors,andwiredglassfirewindows--to restrictthepassageofhotgasesandflames.(Temperature fornotPage9-8 onthesideawayfromthefireisnotafactorinthepass/fail testcriteria'oftheseassemblies; i.e.,firedamyers,firedoorsandwiredglassfirewindows.)

Pleasenotethatthedimensions oftheductworkreferredtointhesestudieswere10in.by10in.,whichislargerthantheductreferenced inthisevaluation.

Conclusion Basedonthepreceding evaluation, reasonable assurance isdprovidedthatafireinFireZone43orFireZone91wouldnotimpairthesafeshutdowncapabi"lities ofD.C.CookUnitl.Inaddition, this,evaluation doesnotadversely

.impactonotherevaluations orexemption-requestscontained' inthis.report.Thebaseswhichjustifythisconclusion

'are.summarized.

asfollows:(1)FireZone43.has.anequivalent fireseverityofunder60minutes,whileFireZone91hasanequivalent fireseverityofunder40minutes.(2)Basedonthecombustible loadingandequivalent fire.severities oneithersideofthebarrierseparating

,FireZone43andFireZone91,abarrierwithaone-"hourfire,ratingissufficient toseparatethetwozonesbaseduponthehazardstowhichtheycouldbeexposed.(3)Section3-3.2.1ofNFPA90ArequiresfiredamperainHVACductpenetrations iftherequiredfire'rating of'hebarrieristwohoursormore.(4)Studiesoftheperformance ofsteelductswithoutfiredampersunderanASTME119fireexposureofonehourrevealthatsteelductsprovidethesamefireprotection aslabeledfiredampers.1/"FireResearchforHVACSystems,"

RichardG.Gewain,TheConstruction Secifier,April1984,pp.64-69.Page9-9 t(5)The7-in.diameterductpenetrating thebarrierj.sofsteelconstruction.

(6)Installing alabeledfiresteelductpenetrating thefireratingwould-notprotection providedbythedamperinthe7-in.diameterbarrierrequiring aone-hoursignificantly enhancetheexistingconfiguration.

9.2,FireArea54andFireZone73DuctEvaluation

~PuruseThepurposeofthisevaluation istoanalyzetheimpacton13redundant safeshutdowncapability ofanundampered HVACsteelductthat.penetrates the'floor/ceiling assembl'y between-the-Upit2ControlRoomandUnit2HVACEquipment Room(FireArea54andFire.Zone73,,respectively).

Inaddition, thisevaluation doesnot,adversely

.impact'onotherevaluations-orexemption requestscontained in.this'report.

FireArea54is.locatedonthe633ftelevation oftheAuxiliary Building.

FireZone73islocated,directlyaboveonthe650ftelevation.

FireZone73ispartofalargerfireareathatincludesFireZones70,71and72.Thebarrierseparating FireArea54andFireZone73isconstructed ofreinforced concretecapableofachieving athree-hour firerating;however,a6-in.diameterundampered HVACductexhaustsairdirectlytotheoutsidefromtheUnit2ControlRoomtoiletthroughtheHVACEquipment Roomabove.Page9-10 SafeShutdownEuiment~~FireArea54containscontrolandinstrumentation cablingforsafeshutdownofD.C;CookUnit2.ShouldafireoccurintheUnit2ControlRoom,completealternate shutdowncapability meetingthecriteriaof.Appendix RSectionIII.G.3isprovidedoutsideofthefirearea.FireZone,73andthefireareainwhichitislocatedcontainnosafeshutdownequipment cablesorcomponents.

FireProtection Euiment.;~Automatic.

areaydetection is..provided

-inFireZones70and73,,withautomatic thermistor detection

.andmanualdelugewaterspraysystemsprotecting

.charcoal'-,'ilter units'n.thesetwo'zones.FireZones-71and72.areprovided, with'ullareadetection,and automatic Halon,1301,suppression

'ystems."FireArea54isprovidedwithanautomatic

'ionization dete'ct.ion.

system.aboveandbelowthesuspended

,ceiling.

Automatic suppression'apabilities arenotprovidedinFireArea54.Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinFireArea54.FireHazardsAnalsisTheundampered 6-in.diameterHVACsteelductislocatedinthefloor/ceiling assembly.separating theUnit2ControlRoom::toiletfromtheUnit2HVACEquipment Roomabove.Forafiretoimpactonredundant safeshutdown.

capability, thefirewouldhavetospread,betweentheUnit1andUnit2ControlRoomsonthe633ftelevation throughthe6-in.diameterexhaustducttoFireZone73onthe650ftelevation.

Page9-11 Thecombustible loadinginFireArea54resultsinanequivalent fireseverityofunder35minutes,withanegligible combustible loadinginthetoilet.(Theactualfireseverityexistingatthistimeisunder23minutes).

Smokeandhot.gases fzomafireinFireArea54couldenterthecharcoalfilterunitsinFireZone73,through

-thefilter.unitsreturnductuntilthef,jz'edampercloses.ThecharcoalfilterunitsinFireZone73azeprotected byautomatic thermistor detection andmanualdelugewaterspraysystems.Shouldsufficient heatenterthecharcoalfilterunitstoignitethe,"charcoal, theautomat'ic'hermi'stor detection systemwillactivatealarmsin-theControlRoom.Uponarrivalof thefirebrigade,-

thedelugewaterspray'systemcouldbeactuatedto.control."

and/or-extinguish thefire."Reasonable assurance isprovidedthatafireofthistypewillnotspreadtotheremainder ofFire-Zone 73.orthe'ireareainwhichitislocated.FireZone73has.acombustible loadingresulting.

inanequivalent fireseverityofunder20minutes.(Theactualfireseverityexistingatthistimeisundersevenminutes.)

Thecombustible loadingfortheentirefireareainwhichFireZone73jslocatedresultsinanequivalent fireseverityofunder35minutes.(Theactualfireseverityexistingatthistimeisunder25minutes.)

Apreviousevaluation dealtwiththepotential forfirepropagation betweentheUnit1andUnit2ControlRoomsfromafireinFireZones70,71,72and73viaPage9-12 steelplateaccesshatchescoatedwithpyrocrete (seeSection~~I9.5,"FireZones70and73HatchEvaluation"

).Thus,theonlyconcernaddressed hereisthepotential forafireinFireZones70,71,72and73topropagate downtheundampered HVACexhaustducttotheUnit2ControlRoomtoilet.ShouldafireoccurinFireZones70,71,:72and73,thepotential existsforfiretospreaddowntheexhaustductintotheUnit2ControlRoomtoilet.Twofactstendtominimizethispossibility.

Oneisthatthedirection ofairflowisfromthetoiletdirectly.to@he'utside throughFireZone73.Thesecondisthatautomatic thermistor detection

-andmanualdelugewater'pray systemsprotectthecharcoalfilterunits.Thesuppression'ystems.

wouldcontroland/or'xtinguish

>any'-fires-that spreadintothecharcoalfilterunitsfrom-afirein.FireZones70,71;~72and73.ShouldfirespreadintotheUnit,2ControlRoomviathe6-in.diameterundampered HVACexhaustduct,alternate shutdowncapability meetingthecriteriaofAppendixRSectionIII.G.3isprovidedoutsideofthearea.Apreviousevaluation indicates thatfirewillnotspreadfromFireZones70,71,72and73into'heUnit1ControlRoom;therefore, the'undampered HVACducttotheUnit2ControlRoomtoiletdoesnotimpactonredundant safe.shutdowncapability.

Page9-13 Conclusion Based.onthepreviousevaluation, reasonable assurance isprovidedthatafireinFireArea54orFireZones70,71,72and73wouldnotimpairthe.safeshutdowncapabilities ofD.C.CookUnit2.Inaddition,

,thisevaluation doesnotadversely impactonother.evaluations or-,exemption requestscontained inthisreport..Thebasesthatjustifythisconclusion aresummarized asfollows:(2)(3)(4)Fire'Area54containscontrolandinstrumentation cablingforsafeshutdownofD.C.CookUnit2;however,no.safeshutdownequipment cables'rcomponents are.providedinFireZones70,71,72and73.Completealternate shutdowncapability isprovidedforFireArea.54.Sincetherearenosafeshutdownequipment cablesorcomponents inFireZones70,71,72and73,'herewillbenoimpacttosafeshutdowncapability shouldafireinvolvebothfireareas.Theautomatic thermistor detection andmanualdeluge.waterspraysuppression systemsinthecharcoalfilterunitsinFireZone73,alongwiththedirection ofairflowfrom-thetoiletintheUnit2"ControlRoomdirectlytotheoutside,providereasonable assurance thatafirewillnotspreadthrough.thecharcoalfilteruniteitherdownintoFireArea54orupintoFireZones70,71,72and73.Shouldafirepropagate betweenFireArea54(Unit2ControlRoom)andFireZone73andspreadbeyondthecharcoalfilterunits,Section9.5evaluation (titled,"FireZones70and73HatchEvaluation"

)demonstrates thatafireinvolving FireZones70,71,72and73wouldnotpropagate downintotheUnit1ControlRoom(FireArea53).(5)Installing alabeledfiredamperinthe6-in.diameterHVACexhaustductfromtheUnit2ControlRoomtoiletdirectlytotheoutsidethroughtheHVACEquipment Roomabove-would notsignificantly enhancetheprotection providedbytheexistingconfiguration.

Page9-14 9.3CCWPumAirSu1DuctEvaluation (FireZone44S)~PuruseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofthecommon'upply airduct,fortheUnit1,Unit2andspareCCWpumpslocatedatelevation 609ftoftheAuxiliary Building..in.,Fire Zone44S..Inaddition,.

thisevaluation doesnotadversely impactonotherevaluations or,exemption requestscontained inthisreport.DescritionThesupplyduct.originates atthe,Auxiliary BuildingairsupplyfanslocatedinFireZone52atelevation 633ft.Fromthesupplyfans,airtravelsdowntoelevation 609ftviaanenclosedverticalchasealongthe.westwalloftheAuxiliary Building.

Onelevation 609ft,coolingairissupplied,.to theCCWpumpsviaamain.supply.ductrunninghorizontally inthe'ast-west, direction tothevicinityof,theCCWpumps.Aseparate4ftx3ftairsupplyhoodisprovidedforeachCCWpumpandissuppliedfromabranchductoriginating fromthemainsupplyduct.Thisevaluation addresses thepotential forcommunication offirebetweentheCCWpumpsviatheseassociated supplyducts.SafeShutdownEuimentFireZone44ScontainsallfourCCWpumpsforUnits1and2,thespareCCWpump,the.twoUnit2CCWheatexchangers, theUnit2CCWpumpsuctionvalves,'nit2CCWheatexchanger outletvalves,,Unit2CCWcommonserviceheadervalves,Unit2CCWtoPage9-15 RHRheatexchanger valves,Unit2ESWtoCCWheatexchanger inletvalves,Unit2ESWtoCCWheatexchanger outletandUnit2MCC2-AZV-A.Withtheexcept-ion ofthecomponent coolingwaterpumps1PP-lOE,1PP-lOWandassociated powercables,therearenoUnit1>-cablesorcomponents inFireZone44Swhichareessent.ial for;;-safeshutdown.

Duetocross-'tie capabilities, anytwoofthefiveCCWpumpsareadequatetoachieveandmaintainshutdownconditions forbothunitssimultaneously.

Theremaining systemsofUnit1usedforalternate shutdownforUnit2areoutsideof~thisfirezone.'FireProtection EuimentTheCCWpumpareaisprovidedwithbothceilingmounted.ionization detectors and,anautomatic preaction pilotsprinkler

system.

Inaddition, sprinkler headsandpilotheadheatdetectors havebeenlocatedandspacedtoprovideenhancedcoverageoftheCCWpumps.Thiscombination ofceilingmountedsprinklers andsprinklers directlyoverthepumpsthemselves providesreasonable assurance againstdamagetoredundant pumpsasaresultofafireoccurring inthevicinityofthepumps.FireHazardsAnalsisThegeneralarea(FireZone44S)containing thepumpshasanequivalent fireseverityofunder25minutes.(Theactualfireseverityexistingatthistimeis14.2minutes.)

Theimmediate areaofthepumpshasacomparatively lowfireseverityPage9-16 sincetheprimarysourceofcombustion isthe25gallonsoflubeoilcontained withinthefiveCCWpumpunits.Thereis,however,noreadilyavailable sourceofignitionforthislubeoilintheeventofaleak.TheflooraroundeachoftheCCWpumpsiscurbedinsuchamannerthatoilleakingmotorwillbeconfinedbytheboundaryoftfromanyonepumporhecurbing.Thus,theoftheleak.inthepumpareaisoilisconfinedtotheimmediate vicinityTheresultant damageofanyfirelimited.Athree-hour fire-rated barrierhasbeenerectedtoprev'ent"the spread'offire-between

-the,.Unit1,Unit2andsparepumps.Thebarrierisofsteelconstruction coatedwitha"'fireprotective materialtoachieveathree-hour firerating.'t islocatedbetweentheUnit1and'nit,2'pumpsintheeast-west direction andalsoextendsNorthbetween'he Unit'eastpumpandthesparepump.Figures9.3-1,9.3-2'and9.3-3depict'thelayoutandconfiguration ofthisbarrier.,Afiredetection andsuppression systemhasbeenprovidedtoassurereliableandquickresponsetothermalconditions intheareaofthepumps.Pilotheadheatdetectors andsprinkler headshavebeenpositioned aroundeachpumpfordirectwaterapplication ontothepump'sbearings(hotsources).

Thisisinadditiontothedetection andsuppression systemusedinFireZone44Sforgeneralareacoverage.

Theapplication rateofsuppression ontotheCCWpumpbearingsisatahigherdensitythanthesystemprotecting thegeneralareaof.FireZone44S.Page9-17 Intheeventofafire,smokeandhotcombustibles wouldtendtorisetoceilinglevelandstratify.

Theceilingheightintheimmediate vicinityoftheCCWpumpsis10ftllin.TotheeastoftheCCWpumps,theceilingheightincreases to20ft4in.Figure9.3-3,depictstheceilingheightswithrespecttot'eCCWpumps.'norderforanysignificant amountsofsmokeandhotcombustibles toimpactonredundant CCWpumps,abuild-upofsmokeand-hotcombustibles wouldh'avetoocc'urfillingtheceilingareafirstandthenaccumulating inadownwarddirection untilitreachedthe"levelofthepumps.Due'to"the'~volume ofh'igherceilingarea,of'heceilingheights,itishighlyimprobable thatsmokecould-"stratify=

downtothelevelofthepumps;therefore,.

theonly.potential

'orheatandsmoketransmission fromone.pump'o'nother isviathesupplyductworkitself.-The4ftby3ftsupplyairhood,foreachCCWpumpisapproximately 6inchesfromthe-topsurface.of thepumpmotor.Whentheairsupplyunitsareoperating, supplyaircomingouttheductwilllimitsmokepropagation intotheduct.Whentheairsupplyunitsarenot,operating, smokeandcombustible gasesfromafireinthevicinityofapumpwouldhavetoriseupthroughthesurrounding areaaroundtheperimeter ofthehood,intothehooditself,andthenintothebranchductofagivenCCWpump.Smokewouldhavetotravelthroughthebranch.ducttothemainsupplyductandthentraverseintoabranchductofaPage9-18 secondCCWpump.ItwouldthenhavetomovedownthebranchductandfinallyexitfromthehoodlocatedoverthesecondCCWpumpmotorpriortoimpacting onasecondCCWpump.Thisrepresents atortuouspathwhichfiremusttakeinordertoimpactonredundant pumps.Thisconfiguration providesreasonable assurance thatafireinthevicinity.ofoneCCWpumpwillnotadversely impactonthecapabilities oftheotherredundant CC5pumpstoachieveandmaintainsafeshutdownconditions.

Theverticalportionofthemainsupplyairrundoesnotconta'in' fire'damperstherebyproviding adirectpath.ofcommunica'tion betweenFireZone52on,,elevation 633ftandFireZone44Sonelevation "609.ft.TomaintaintheboundaryfirpbarrierbetweenFireZones52..and'44S,athree-hour-rated fire/damper,willbeinstalled at'.the'.top,ofthevertical.

portionofthesupplyairrun.Conclusion

~'-...Based;on

.the..previous

analysis, afire-rated damperisrequiredatthepointwherethemainductentersatthetopoftheairshaftfromFireZone52onthe633ftelevation; however,fire-rated dampersarenotrequiredatanyofthebranchductstothe'CWpumpsupplyairhoods.Thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)Thereisessentially nocombustible materialinthevicinityoftheCCWpumps,otherthanlubeoilPage9-19 contained withinthepumps..Iftheoilwithinthepumpswereto'spillontothefloor,thereisnoreadilyavailable sourceofignition.

(2)Theresultant damagefromafireinthepumpareawouldbelimiteddueto(a)thethree-hour firebarrierseparating thepumpsand(b)thequickresponseofthedetection andsuppression systemsatboththeceilingandpumplevels.(3)"Smokeandhot'ombustibles wouldcollectwithinthebeampocketsatthe10ftllin.highceilinglevelimmediately overtheCCWpumpsandthentendtoflowupintothe20ft4in.highceilingspace.Thiswillpreventastratified layerofhotgasesfromformingtoadepthsufficient todamagetheCCWpumpsunaffected bythedirectresultsofthefire.(4)Duetotheclose-proximity ofthe-hoodtothetop*surfaceoftheCCWpumpmotor,thesurrounding areaaroundtheperimeter ofthehoodthroughwhichsmokeandhotcombustibles would.havetopassisseverely'.limited.*"(5),Toimpact"onredundant pumpssimultaneously,'moke andhotgaseswouldhavetoenterthesupplyairhood:.,directlyoveroneCCWpump,'ravel throughthebranchductinto,the,mainsupplyduct,travelthroughthebranch'duct.

ofasecondCCWpump,andthentraveldownthatpump's.supplyairhoodtoimpactonthepumpmotor.Thisrepresents a'tortuous pathwhichfiremusttravel,therebyproviding reasonable assurance thatafireinthevicinity,,

ofone~,pump.will..not adversely impactontheabilityofredundant pumpstoachieveandmaintainsafeshutdownconditions.

Page9-20 9.4Auxiliar.

BuildinVerticalAirShaftsEvaluation (FireAreas12and22)~PuroseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability oftwoverticalairshafts,locatedintheAuxiliary

Building, thatextendfromthe573ftelevation tojustbelowthe650ftelevation withdamperedandundampered ventilation openings.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained

'in'this'report.

TheUnit1airshaftlocatedinFireArea12'risesvertically withinFireArea12andabutsthe-various'Auxiliary Buildingpumpand.exchanger cubicles(e.'g.;'charging,'HR, CTS-,,safetyinjection, etc.)extending fromthe573;ftelevation tojustbelowthe650ftelevation.,

Similarly, theUnit2airshaftlocated'-,in Fire.Area22risesvertically

.withinFireArea22andabutsthevariousAuxiliary Buildingpumpandexchanger cubicles.

Atthe573ftelevation, anundampered airexhaustduct(approximately 1ftby2ftinsize)takesairfromeachUnit1containment spraypumpcubicle(FireZones1Aand1B)anddischarges thisairintotheUnit1airshaft.Similarly, theUnit2airshaftandcorresponding pumpcubicles(FireZoneslEand1F)containthesametypeandnumberofundampered exhaustducts.TheUnits1and2RHRpumpcubicles(FireZones1C,1D,Page9-21 1GandlH)containathree-hour-rated damperintheexhaustductwhichdischarges airintotheairshafts.Atthe587ftelevation, an'ndampered exhaustduct(approximately 2ftbyl-l/2ft)commontoeach'Unit1safetyinjection pumpcubicle(FireZones64Aand64B)takesairfromeachofthecubiclesanddischarges thisairintotheUnit1.airshaft.Inaddition, undampered exhaustductstakeairfromeachofthethreechargingpumpcubicles(FireZones62A,62B,and62C)'nddischarge thisairintotheUnit1airshaft.Similarly, theUnit2air=shaftandcorresponding pumpcubicles.-(FireZones63A,'3Band:63C,'5Aand65B)containthesametypeandnumberofundampered"exhaust ducts.'At':the609'.ft-elevation,

.undampered exhaustductstakeairfromtheUnit.'1RHRandcontainment sprayheat.exchanger cubicles(FireZones"44Athrough44D)anddischarge thisairintotheUnit1airshaft.The'xhaust ductsarelocatedjustbelowtheceilingoftheairshaft,nearthe650ftelevation.

Similarly, theUnit2airshaftandcorresponding exchanger cubicles(FireZones44Ethrough44H)'ontain thesametypeandnumberofundampered exhaustducts.Theexhaustairdischarged intotheUnit1airshaftflowsupwardstothe633ftelevation whereitisexhau'sted fromtheAuxiliary Buildingbytwoairexhaustfans(1HV-AES-1 and1HV-AES-2) locatedinFireZone49.Althoughthefanunitshavemanuallyoperateddampersforflowcontrol,therearenofire-Page9-22 rateddampersattheairshaft'snorthwallwheretheairleavestheshafttoentertheexhaustfanunits.Similarly, theUnit2airshaftexhaustsairatthe.633ftelevation throughtwoairexhaustfans(2HV-AES-1 and2HV-AES-2) locatedinFireZone50.Nofire-rated dampersexistattheairshaft'ssouthwallwheretheairleavestheshafttoenterthe.exhaustfanunits.SafeShutdownEuimentFireZones49and50arelocatedonelevation 633ftandarecontained inthefireareadefinedbyFireZones49,50,'51,52,3,31,32,35,36,~,48,69.,106,107,and146.Safeshutdownequipment islocatedinFireZones50,52,69,106and107in-eludingl-CM0-429, 2-CMO-429 (CCWtoRHRheatexchanger isolation MOV),1-CCW-214, 1-CCW-220, 2-CCW-214, 2-CCW-220 (Unit1andUnit2CCWsurgetankmanualisolation valve),MCCs1-AM-A,2-AM-A,l-AM-D,2-AM-D,andbatteryBNwithassociated distribution cabinetDCN(Unit1andUnit2).VariouscablesarelocatedinFireZones32,50,51,52,69,106and107.FireZones3,31,35,36,48,49and146donotcontainanysafeshutdownequipment and/orcables.Basedonthesafeshutdownsystemanalysis, intheeventofafireinthisarea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoring instrumentation.

However,theMarch1983submittal recommended theadditionof,analternate sourcerangeneutronmonitoring channeltoprovideindication atlocalshut-downpanelLSI-4locatedinFireZone5.Page9-23 FireZones44Athrough44Hareandarecontained inthefireareathrough44H,37,43,44Nand44S.locatedonelevation 609ftdefinedbyFireZones44AThisfireareacontainsvarioussafeshutdownmotor'ontrol centers,pumpsandredundant cables.Asrecommended inSection8ofthisreport,variousmodifications willbemadeinthisfireareatoensuresafeshutdowncapability.

FireArea12atthe596ftelevation, whichincludesthe'Unit1airshaft,containssteamgenerator 2and3supplyvalves(FM0-221,

-222,-231,-232),containment sump"'toRHRpumpsuction~valves(ICM-305, 306),localshutdownindication panels(LSI-2,.'LSI-6),

andvarioussafeshutdowncablesassociated withthese'"'equipment.

TheCCW-toRCPthermalbarrierisolation valvesare~alsolocatedin.thisfirearea'CCM-453,

-454,-458,-459);(however,'hese valvesarenotrequiredforsafeshutdownandwere;included inthe=orig,inal evaluation forplantoperational flexibility.

Asconcluded bytheMarch1983submittal, atleastonepathofsafeshutdowncomponents isavailable ineachofthesafeshutdownsystems.FireArea22atthe596ftelevation, whichincludestheUnit2airshaft,containssteamgenerator 2and3supplyvalves(FM0-221,

-222,-231,-232)containment sumptoRHRpumpsuctionvalves(ICM-305, 306),localshutdownindication panels(LSI-2,LSI-6)andvarioussafeshutdowncablessimilartothosecablesfoundinFireArea12.TheCCWtoRCPthermalbarrierisolat,ion Page9-24 valves(CCM-453,

-454,-458,-459)arealsolocatedinthisfirearea;.however,thesevalvesarenotrequiredforsafeshutdownandw'ereincludedintheoriginalevaluation forplantoperational flexibility.

Asconcluded bytheMarch1983submittal, atleastonepathofsafeshutdowncomponents isavailable ineachofthesafeshutdownsystems.FireZones64Aand64B(Unit1safetyinjection cubicles) and65AandB(Unit2safety,injection cubicles) arelocatedonelevation 587ftandarecontained inthefireareadefinedbyFireZones5,6A,6N.6M,6S,64A,64B,65Aand65B.Thisfireareacontains1-LSI-3,2-'LSI-3, MCCs1-AB-A,1-AB-D,2-AB-A,'I2-AB-D,1-ABV-A,'-ABV-D, 2-ABV-A,,

2-ABV-D,batterydistribution" cabinetsl-ABN,2-ABN,,and,Unit2chargingflowcontrolvalve2-QRV-251.-=

Inaddition, varioussafe-shutdown"cables are'ocated<

withinthisfire.area.Asrecommended inSection8ofthis.-report,variousmodifications willbemadeinthisfireareatoensureshutdowncapability.

Unit1FireZones62A,62B,and62Cdefineafirearealocatedonelevation 587ftwhichcontainstheUnit1RWSTtoCVCSpumpsisolation valvesIM0-910,IMO-911;chargingpumpsPP-50E,PP-50W;charginglubeoilpumpsPP-50E(LO)andPP-50W'-'LO);

minimumflowvalvesQMO-225andQMO-226;andchargingflowcontrolvalveQRV-251.Inaddition, varioussafeshutdowncablesarelocatedwithinthisfirearea.Intheeventofafirein'hisarea,theUnit1CVCSpumpswouldbelost.Sections5and8Page9-25 ofthisreportproposethecrossconnection oftheplantCVCSsystemssuchthatthechargingfunctions ofthefireaffectedunitcanbemaintained viathecrossconnection oftheunaffected unit'sCVCSsystem.All.othersafeshutdownsystemsareavailable in.the.eventofafire.Unit2FireZones63A,63Band.63Cdefineafirearealocatedonelevation 587-ftwhichcontainstheUnit2RWSTtoCVCS'pumpsisolation valvesIM0-910,IMO-911;chargingpumpsPP-50E,PP-50W;charginglubeoilpumpsPP-50E(LO),PP-50W(LO);andminimumflow'valvesQMO-225,andQMO-226".

Thiswouldresult'"'n thelossofthe-Unit.2 CVCS'umps'n=theeventofafire.However,aspreviously described, thechargingfunctions ofthefireaffectedunit,can.bemaintained viathecrossconnection oftheunaffected.unit's.CVCS

'system.'--

Variousothersafeshutdowncomponents and.cables,

.associated

'withtheauxiliary feedwater, EPSandRCSsystems.arealso,locatedinthisfirearea;however,atleastonepathofsafeshutdowncomponents

.isavailable duringa.fire.FireZones1A,1B,1Eand1Farelocatedonelevation 573ftandarecontained withinafire'readefinedbyFireZones1,lAthr'ough1H,136,137,138A,138Band138C.ThisfireareacontainsRHRpumpsPP-35EandPP-35WandRHRpumpsuctionvalvesIMO-310andIMO-320forbothunits.Inaddition, varioussafeshutdowncablesarelocatedwithinthisfirearea.Section8ofthisreportrecommends certainmodifications which,afterPage9-26 installation, willensurethatatleastonepathofs'afeshutdown~~~~components willbeavailable forallsystems.FireProtection EuimentFireZone1.contains

~~anautomatic detection systemforthegeneralcorridorarea.Section8ofthisreportrecommends thattheRHRandCTSpumpcubiclesbeprovidedwithautomati'c detection including remotealarmingcapability intheControlRooms,andtheinstallation offiredampersintheboundaryofthe:RHRpumproomstotheverticalairshaftsinFireAreas12,and22.Italsorecommends that;automatic sprinklers belocated.aroundtheperimeter oftheopenstairwaytothe587ftelevation toensurethe'integrity ofthe.barrierseparating thesetwdelevations.

Theserecommendations havebeen.implemented."

Thefire,areaat-the587ft0in.,'and601ft0"in..elevation.

oftheAuxiliary Buildingisdefined'y Fire,Zones5,6A,6N,"6M,>6S,'64A,64B,65Aand65B.,With,theexception ofFireZone6A"(601ftpipetunnel),thesezonescontainbothautomatic drypilotpreaction sprinklers (including protection ofstairways toadjacentelevations) andionization detection.

ThefireareadefinedbyFireZone62A,62Band62C(Unit1'harging pumpcubicles) preaction sprinklers andcontainsbothautomatic drypilotionization detection.

Similarly, thefireareadefinedbyFireZones63A,63Band63C(Unit2charging-pumpcubicles) containsbothautomatic drypilotpreaction sprinklers andionization detection.

Page9-27 FireAreas12and22donotcontaineitherautomatic suppression ordetection systems.ThefireareadefinedbyFireZones37,43,44N,44Sand44Athrough44Hcontainsautomatic detection inFireZones37,43,44Nand44S.Automatic drypilotpreaction sprinklers, including protection ofstairways toadjacent'levations, areprovidedinFireZones44Nand44S.ThefireareadefinedbyFireZones3,31,32,35,36,48,49I5051I5269106107detection inFire.Zones32,48,49,and14'ontains automatic 50,51,52,69,106'ndi'.107'.

OnlypartialcoverageisprovidedinFireZone3.Nodetection coverageis.providedinFireZones31,35,36and146.Thermistors.are-also.provi:ded for'thecharcoal".filter unitsinFireZones,49,,50and69.'utomatic drypilotpreaction sprinklers are-contained inFireZones*32,51'and52withpartialcoverageprovidedinFireZone3.Amanual'deluge systemisusedforthecharcoalfilterunitsinFireZones49.50and69.FireHazardsAnalsisThecombustible loadingsforalloftheabovefireareasareindicated bythefollowing:

FireAreaorFireZonesComosinaFire-AreaAreaFireSeverity(Minutes)

FZs1,1Athrough1H,136,137I138A138B138C15Page9-28 FZs3,32,36,48,49,50 51,52,69, 106,107,146 FZs5,6N,6A,6M,6S,61, 64AGB,65A&B 12(including airshaft)22(including airshaft)FZs3743g44Ng44Sg44A through44H2520151035FZs62A,B,CFZs63A,B,C3535Eachoftheai~rexhaustductpenetrations fromthechargingpumpcubicles(FireZones62A,62B,62C,63A,63Band63C)intotherespective unit'sairshaftare-tobeupgradedwiththree-,.hour-rated firedamperstomaintainthefireratingofthefire'areaboundaryinwhichthepenetrations,-

arelocated.Thiseliminates thecombustible loadingofthechargingpumpcubiclestobeconsidered inthisevaluation.

Productsofcombustion fromanyofthefireareasboundingeitherverticalairshaftmustpassthroughitsassociated airshaftinordertocommunicate withanotherfirearea.Smoke'ndhotcombustibles enteringeitherairshaftwouldtendtostreamupwardstothetopoftheshaft.Inorderforanysignificant amountsofsmokeandhotcombustibles toimpactonsafeshutdowncomponents andcablesinotherfire'areas, abuild-upofsmokeandhotcombustibles wouldhavetobankdownuntilitreachedtheundampered ductpenetrations.

Thisbuild-upofcombustion productswouldbePage9-29 limitedbytheexhaustfanslocatedinFireZones49and50forUnits1and2respectively whichruncontinually.

Undernormalconditions, thesefanswoulddissipate theproductsofcombustion totheoutsidebeforeabuild-upcouldtakeplace.Iftheseair-exhaustfanswerenotinoperation, combustion productscould'begintobankdownandentertheundampered exhaustductsstartingwiththeductsatthetopoftheshaft.Theamountofthecombustible loadingineachofthefireareasofconcern,alongwithlackofexhaustcapability, wouldmaketheaccumulation ofsignific'ant amountsofcombustion productsdifficult ifnotimpossible

-withintheairshaftespecially at'thelowerelevation exhaustducts.Inaddition, asproductsofcombustion passthroughei'therverticalairshaftintootherfire'areas,thehotcombustibles would.tendtonaturally cooldown+overthislengthypathoftravel.Thefollowing scenarios areprovidedtoillustrate thecircuitous pathrequiredtoimpactredundant safeshutdownequipment ineachofthefireareasconcerned.

Elevations 633ftand650ftThefire,areadefinedbyFireZones3,31,32,35,36,48,'49,50,51,52,69,106,107,and146islocatedatvariouselevations oftheplant,including elevations 587,609,630,633and650ft.OnlyFireZones49(Unit1HVACvestibule) and50(Unit2HVACvestibule) abuttheairshaftswithoutfiredampers.Eachfirezonecontainstwoengineered safeguard systemPage9-30 ventilation fanswhichtakeairfromtheirrespective air'shaft andexhaustitthroughaductfrom=theAuxiliary Buildingroof.Sincethereisnofire-rated damperattheairshaftductpenetration foreachfan,productsofcombustion mayenterFireZones49or50.Inorder'orafiretobetransmitted fromtheairshafttoeitherfirezone,oneorbothventilation fansmustbeoff.,Productsofcombustion mustthenenter'heairshaftductpenetrations andescapeintoeithertheventilation fansortheirassociated ductsinto-either Fire=Zone49or50.FirewouldthenhavetotravelfromeitherFireZone49or50totheotherfirezonescontained inthefirearea..Itisunlikelythatafirecouldbeinitiated inthismannerandthenengulftheentirefirearea.Aspreviously discussed, FireZones32,50,,51,52,69,106and107aretheonlyfirezonesinthefireareacontaining safeshutdownequipment and/orcables.Thesefirezonescontainautomatic detection systemsforgeneralareadetection, withCthermistors andamanua'1delugesystemalsoprovidedforthecharcoalfilterunitsinFireZones49and50.FireZones49through52arenotprotected byautomatic drypilotsprinkler systems;however,Section8ofthisreportrecommended anautoma-ticdrypilotsprinkler systembeinstalled inFireZones51and52.Thesemodifications havebeenimplemented.

Thisfireareahasacombinedfi.reseverityof25minutes.Theactualfireseverityexistingatthistimeisunder13minutes.Page9-31 InorderforafiretotravelfromeitherFireZone49or50toFireZones3,31,32,35,36,48,69and146,thepathmustbe"throughtheunratedpenetrations betweenFireZones49and69orbetweenFireZones50and69.Sincetheonlypathtotheseother'"firezonesisthroughunratedand/orunsealedpenetrations "leadingtoFireZone69,thispathisrestricted.

(Itis<restricted duetothepresenceofbarrierswithpenetrations whichmayormaynotbesealed.Thispresentsmorerestrictions thanwouldexistifthebarrierdidnotexistatall.)FirecouldalsospreadfromFireZone49'o52to51orFire."Zone50to52to51,andthenspreadeitherintoFireZones106(and107orupintoFireZone69.FromFireZone69,firecould,~Shen.spread downintoFireZones32,35,36,48,3and146,which;areconnected toFireZone69onlowerelevations.

Whileitis>credible thatfirecouldspreadfromeitherFireZones49or50ptoFireZones51and52,theautomatic detection anddrypilotsuppression systemsinbothfirezoneswillacttolimitfirespreadtoeitherFireZones51and52orotheradjacentfirezones.Themoredirectandplausible routeisdirectlyfromeither,FireZone49or50directlyupintoFireZone69andfromFireZone69totheadjacentfirezones.FireZones69,32and48areprovidedwithautomatic detection andpartialdetection coverageisprovidedinFireZone3.Drypilotpreaction suppression systemsareprovidedinFireZone32withpartialcoveragePage9-32 providedinFireZone3.Inaddition, FireZone69isprovided~~withamanualdelugesystemfortheHVACcharcoalfilterunits.Intheunlikelyeventthathotcombustibles shouldenterFireZone69fromeitherHVACvestibule andthenenterthecharcoalfilterunitandignit'ethecharcoal, thefireprotection systemsprovided~oulddetectanduponactuation willextinguish thefirewithintheunit.Therefore, damagetosafeshutdownequipment duetothetransmission offirebetweentheairshaftsandthisfireareaisnotacredibleevent.Elevation 609ft'Products ofcombustion enteringthe,fireareadefinedbyFireZones37,43,44N,44S,.and44Athrough44Hwouldenter-.throughundampered ductpenetrations

.in'theCTS/RHRheat"exchanger cubiclesjustbelowthe650'ftelevati'on.

FireZones44Athrough44Heachcontainanexhaustpenetration inacommon:wallwithitsrespective airshaft.Unit1FireZones44Aand44Bdonotcontain,anysafeshutdowncomponents orcables.Unit2FireZones44Eand44Fcontainnosafeshutdownequipment andonlyafewcablesassociated withtheCVCSflowcontrolvalve(QRV-251) andtheCVCSpumpsuctionisolation valve(IM0-911).

Unit1FireZones44C,44DandUnit2FireZones44G,44HcontaintheRHRheatexchangers, valvesandassociated cables.Sincealloftheabovefirezonesadjacenttotheairshaftscontainmostlymechanical equipment andpiping,thecombustible loadinginthesefirezonesislow.Asaresult,theCTSandRHRheatexchanger Page9-33 cubiclesarenotaprimarysourceofignitionforanyhotcombustibles whichmightenterthecubiclesviatheexhaustpenetrations.

NoneoftheCTS/RHRheatexchanger cubiclescontaineitherautomatic detect'ion orsuppression systems.However,afireinFireZones44Athrough44Hwouldimpactonlycoldshutdown.

valveswhich.couldbemanuallyoperatedbyplantpersonnel.

FireZones37,'3,44Nand44Sareprovidedwithautomatic detect.ion systems.Anautomatic drypilotpreact,ion suppression systemhasbeenprovidedforFireZones44Nand44S.Forfire'oimpactonthesefirezones,itwouldhavetospreadintothezonesfromtheverticalairshaftsviatheheatexchanger cubicles.

,Theexhaustductstotheheat-exchanger cubiclesarelocated.justbelowelevation 650ft,withthetopof'theentrancedo'ortoeach'cubicle "locatedatapproximately elevation 616ft.Productsofcombustion wouldhavetobankdowntothelevelofthetopofthedoorsin-ordertospreadout.intoFireZones44Nand44S.Thisisnot.considered acredibleevent.However,anyproductsofcombustion orfireemanating fromtheCTS/RHRheatexchanger cubicleswouldbedetectedandextinguished bythesefireprotection systemsinFire.Zones44Nand44S.Therefore, damagetosafeshutdownequipment duetothetransmission offirebetweentheairshaftandthisfireareaisnotacredibleevent.Elevation 587ftTheductpenetrations enteringtheSafetyInjection (SI)cubicles(Unit1FireZones64Aand64BandUnit2FireZones65APage9-34 and65B)arelocatedatapproximately the587ftelevation.

Asingleductpenetration ineachairshaftissharedbybothSIpumpsofaunit.Acommonductextendsfromthepenetration toeachofthepumpcubicleswhereairistakenfromthecubicleareaandexhausted intotheshaft.Therearenosafeshutdowncomponents locatedintheSIcubicles.

However,thesecubiclesare,partofafireareacontaining varioussafeshutdowncomponents andcables.FireZones5,6A,6N,6Mand6SareadjacenttotheSIcubiclesofbothunitsandcontainsafeshutdown,components+.,

suchaslocalshutdownindication panels,variousmotorcontrolcenters,distribution

cabinets, chargingflowcontrolvalveandassociated cables..Inorderforafiretobetransmitted fromtheairshafttothese,components, products.of-combustion:

would*havetobe.generated insufficient quantities as,tofill,the="air

'shaftfrom~approximately the650fttothe587ftelevations oftheair..shaft.Thesmokeandhotcombustibles wouldhavetothenentertheundampered exhaust'uct andexittheductabovetheSIpumps.Thesmokeandhotgaseswouldthenhavetoignitecombustibles intheSIpumpcubiclesandthenspreadthroughtheSIcubicles,',~

aroundthemissileshieldwall,andintoFireZone6N.Thisis,notacredibleeventduetothefollowing considerations:

(l)BoththeSIcubiclesandFireZones5,6N,6Mand6Shavebeenprovidedwithautomatic detection anddrypilotpreaction suppression systems.(2)Thisfireareahasinafireseverityacombustible loadingthatresultsof20minutes.(TheactualfirePage9-35 severityexistingatthistimeisunder6.5minutes).

(3)Thecombustible loading'noutsideoftheSIcubiclestherestofthefirebrea.shutdownequipment duetobetweentheairshaftandcredibleevent.theimmediate vicinitybutissignificantly lowerthanTherefore, damagetosafethetransmission offirethisfireareaisnotaElevation 573ftProductsofcombustion enteringthefireareacontaining FireZones1,1A-1H,136,137,138A,138Band138Cwouldbeviathecontainment spraypumpcubicles.

Theaccessdoorsarescreenmeshforventilation purposes; however,themissileshieldwalls,approximately 14ftinlengthforminga"T"attheentranceways,extendbeyondthewidthofthedoorway.SincetheRHRpumpsandassociated valves.aretheonlyredundant safeshutdowncomponents inthisarea,afirewouldhavetopassthrough-theCTScubiclesandaroundthe.,missile wallsinto-a'ommonareabetweentheUni.t1and2'ubicles...(A firecouldnottravelfromtheairshafttotheRHRcubiclesdirectlysincetheairductsbetweentheairshaftandtheRHRcubiclesareprovidedfire"'rated dampers.)

ItwouldthenhavetoentertheRHRcubiclesbypassingaroundtheassociated missileshieldwalls.Inaddition, thepenetrations toFireZoneslA,1B,lEand1F(the.CTScubicles) fromtheairshaftarelocatedatthelowestelevation oftheairshaft(approximately 573ft).Inorderforcombustion productstoenterthesepenetrations, smokeandhotcombustibles wouldhavetobegenerated insufficient quantities astofillFireAreas12Page9-36 and22including theirrespective airshafts.Thisisextremely unlikelysincethecombustible loadinginthefireareasofconcernislow.Therefore, transmission of.firebetweentheairshaftandtheRHRcubiclesisnotacredibleevent.SstemsAnalsisTheabovefirehazardsanalysisdemonstrates theextremely unlikelyscenarios requiredforafiretobetransmitted soastototallyengulfeitherairshaftandtheirrespective adjoining fireareasatvariouselevations.

Usingtheabovescenarios asabasis,asystemsanalysiscanbeperformed todetermine theimpactofafireonthesafeshutdowncapability oftheplant.Forthepurposesofthisanalysis, thefollowing assumptions areused:(1)Theverticalairshaftsareacommonmeansofcommunication offireto,.allofthefireareasdescribed above;however,itisnotcrediblethatal'1ofthesefireareasaresimultaneously engulfedbyfire.(2)Theonlyfireareasassumedtobeinvolvedin'afireatanytimearethefireareasdefinedbyeitherairshaft(i.e.,FireAreas12or22)and~onloneoftheother'ireareasadjacenttotheairshaftunderconsideration.

(3)Considering assumption (2)above,theworst-case scenarioisdefinedasafiretotallyengulfing eitherFireArea12or22andthentravelling thecircuitous path(described inthepreviousscenarios) inoneoftheadjacentfireareasuntilthefirereachesafirezonewithinthefireareacontaining asuppression systemcapableofextinguishing thefire.Thefiredoesnottravelanyfurtherwithinthefirearea.(4)Itisassumedthatthefirestartsatthe587ftelevation (i.e.,Quadrant2pipetunnelareaforbothPage9-37 units)oftheairshaftandthentravelsthroughtheverticalportionoftheairshafttotheunratedpenetrations.

Thisisareasonable assumption sincetheprimarysourceofcombustible loadingforbothairshaftsislocatedintheQuadrant2pipetunnelofeachunit.Thefollowing isadiscussion ofthesystemsanalysisfor'eachofthepreviously described scenarios usingtheabove'assumptions:

Elevations 633ftand650ftFireAreaContainin FireZones49,50,51,52,3,32,36,48,69andFareArea12or22ForafireineitherUnit1orUnit2airshaft(FireArea12orFireArea22respectively),

itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZone49inUnit1orFireArea22andFireZone50inUnit2.F,Thisassumption isbasedonthefollowing:

(1)Afireoriginating ineitherairshaftmustproduceenoughproductsofcombustion tofillt,hetopoftheairshaft(i.e.,justbelowthe650ftelevation).

Theproductsofcombustion, producedfromlowcombustible loadingcontained ineachairshaj+t,willtendtobedispersed withinthelargevolumeoftheairshaft.(2)Thehotcombustibles producedfromtheairshaftfirewilltendtocoolrapidlybecauseofthelowcombustible loadingandlargevolume.(3)TheHVACexhaustairfanunitslocatedinFireZones49(Unit1)and50(Unit2)containdetection anddelugesystemsassociated withtheircharcoalfilters.Thesedelugesystemsarecapableofextinguishing anyfireinthecharcoalbedswhichmayoriginate eitherinternaltoorexternaltotheseairfanunits.Page9-38 Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents (i.e.,equipment and/orcables)onlyinFireArea12andFireZone49(whichcontainsnosafeshutdownequipment orcables)forUnit'orinFireArea22andFireZone50forUnit2.ForboththeUnit1andUnit2systemsanalyses, itwasconcluded thatatleastonepathofsafeshutdowncomponents existsforeachsafeshutdownsystem.Thisevaluation fortheabovefireareasandfirezonesdoesnotaffecttheexistingexemption requestsconcerning theAuxiliary BuildingHVACDuctPenetrations (Section7.13)ortheContainment SeismicGaps(Section7.14).Elevation 609ftFireAreaContainin FireZones3743,44N,44S,44Athrouh44HandFireArea12or22Asimilarmethodofanalysismaybeusedfortheabovefireareas.ForafireineithertheUnit1orUnit2airshaft(FireArea12orFireAl"ea22respectively),

itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZones44A,44B,44C,44DinUnit1orFireArea22andFireZones44E,44F,44G,44HinUnit2.,Thi:sassumption isbasedonthefollowing:

(1)As'previously discussed, eachajrshafthasalowcombustible loading(20,[00Btu/ftfortheUnitiairshaftand13,000Btu/ftfortheUnit2airshaft)which'will tendtodispersethroughout thelargevolumeoftheairshaft.Page9-39 (2)Thehotcombustibles producedwilltendtocoolrapidlywithinthelargeai.rshaftvolume.(3)TheCTSandRHRheatexchanger cubiclesarelargevolumesandcontainmostlymechanical equipment andpiping;thecombustible loadinginthesefirezonesislow.Ifhotcombustibles weretransmitted intothesecubiclesfromtheair,shaft(eitherUnit1orUnit2),itwouldbeextremely difficult forafiretodevelopinanyofthesecubicles.

Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents (i.e.,equipment and/orcables)onlyinFireArea12andFireZones44Athrough44D,forUnit1orinFireArea22andFireZones44Ethrough44HforUnit2.ForboththeUnit1andUnit2systemsanalyses,'it wasconcluded thatatleastonepathofsafeshutdowncomponents existsforeachsafeshutdownsystem.Thisevaluation fortheabovefireareasandfirezonesdoesnotaffect.theexistingexemption requestsconcerning theAuxiliary BuildingHVAC-Duct Penetrations (Section7.13)ortheContainment SeismicGaps(Section7.14).Elevation 587ftFireAreaContainin FireZones56A6N,6M,6S,6164A,64B65A65BandFareArea12or22ForafireineithertheUnit1orUnit2airshaft,itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZones64A,64BinUnit1orFireArea22andFireZones65A;65BinUnit2.Thisassumption isbasedonthefollowing:

Page9-40 (1)Aspreviously'iscussed, eachajrshafthasalowcombustible loading(20,)00Btu/ftfortheUnitlairshaftand13,000Btu/ftfortheUnit2airshaft)whichwilltendtodispersethroughout thelargevolumeoftheairshaft.(2)Thehotcombustibles, producedwilltendtocoolrapidlywithinthelargeair=shaft volume.(3)TheSafetyInjection Pumpcubicles(i.e.,FireZones64Aand64BinUnit1and65Aand65BinUnit2)arelargevolumes,withthefollowing combustible loadingvalues:FireZoneAssumedCombustible LoadingforthisEvaluation (ActualCombustible Loadin)64A64B65A65B27,000Btu/ft27,000Btu/ft27,000Btu/ft27,000Btu/ft'12,642 (10,739(11,518(13,008Btu/ft2)Btu/ft2)Btu/ft2)Btu/ft)Ifhotcombustibles weretransmitted into'thesecubiclesfromtheairshaft(eitherUnit1orUnit2),itwouldbeunlikelythatafirecoulddevelopbecauseoftheamountofthecombust.ible loadingsandthegeneralareadetection andsuppression systemsineachzone.Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents (i.e.,equipment and/orcables)onlyinFireArea12andFireZones64Aand64BforUnit1orinFireArea22andFireZones65Aand65BforUnit2.ForboththeUnit,1andUnit2=systemsanalyses, itwas'concluded thatatleastonepathofsafeshutdowncomponents existsfor.,eachsafeshutdown.system.Page9-41 Thisevaluation fortheabovefireareasandfirezonesdoesnotaffecttheexistingexemption requestsconcerning theAuxiliary BuildingHVACDuctPenetrations (Section7.13)orthe;.Containment SeismicGaps(Section7.14).Elevation 573ftFireAreaContainin FireZones1,lAthrouh1H,136,137,138A,""138B,138CandFireArea12or22ForafireineithertheUnit1orUnit2airshaft,itisassumedforthepurposesofthisanalysisthatthefirewill.engulfFireArea12andFireZones1AandlBinUnit1orFireArea22andFireZones1Eand1FinUnit2.Thisassumption is-basedonthefollowing:

1Aspreviously di'scussed, eachajrshafthasalowcombustible loading(20,)00Btu/ftfor'heUnitlairshaftand13,000Btu/ftfortheUnit2airshaft)which'will tend'odisperseanyproductsofcombustion throughout thelargevolumeoftheairshaft.(2)(3)(4)Thehotcombustibles producedwilltendtocoolrapidlywithinthelargeairshaftvolume.TheContainment SprayPumpcubicles'(i.e.,FireZones1Aand1BinUnit1andlEand1F"anUnit2)arelargevolumes,wit(combustible loadingvaluesofunder20,000Btu/ftforeachcubicle.Ifhotcombustibles weretransmitted intothesecubiclesfromtheairshaft(eitherUnit1orUnit2),itwouldbeunlikelythatafirecoulddeveloporbetransmitted toFireZone1duetotheamountofthecombustible loadingsanditsprimarylocations (withinthepumps).Inaddition, FireZone1containsgeneralareadetection systems.Apreviousexemption requestwassubmitted toandapprovedbyNRCrequesting anexemption frominstallation ofanautomatic suppression systemintheRHR/CTSpumparea.Theexemption providesadetailedfirehazardsanalysisdemonstrating thatthefireareaPage9-42 andPumpRoomcubiclesareconstructed topreventa-firefromleavingonePumpRoomandentering.

anotherorfromenteringtwoPumpRoomsfromthecommonarea..Asa'resultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents (i.e.,equipment and/orcables)onlyinFireArea12andFireZones1,lAand1Bfo'rUnit1orinFireArea22andFireZones1,1Eand1FforUnit2.ForboththeUnit1andUnit2systemsanalyses, itwasconcluded thatatleastonepathofsafeshutdowncomponents existsforeachsafeshutdownsystem.Thisevaluation fortheabovefireareasandfirezonesdoesnotaffecttheexistingexemption requestsconcerning theAuxiliary BuildingHVACDuctPenetrations (Section7.13)ortheContainment SeismicGaps(Section7.14).Conclusion Basedonthepreviousanalysis, reasonable assurance canbe.providedthatafireinanyoftheadjoining fireareastotheAuxiliary Buildingairshaftswi'thundampered orunratedductpenetrations orafireineitherairshaftwillnotadversely impactonsafeshutdowncapabilities oftheplant.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesfortheaboveconclusion aresummarized below:(1)=Theairexhaustductpenetrations fromthechargingpumpcubicles(FireZones62A,62B,62Cand63A,,63B, 63C)intotherespective unit'sairshaftwillbeupgradedtomaintainthefireratingofthefireareaboundary.

Page9-43 (2)(3)(4)(5)Smokeandhotcombustibles enteringeitherairshaftwouldnormallytendtobeexhausted through,theEngineered Safeguards Systemstodotheplantvents.Smokeandhotcombustibles enteringeitherairshaftwouldtendtostreamupwardstotheceilingoftheairshaft,whentheunitsarenotrunning,spreading outintoFireZones49(fromFireZone12)or50(fromFireZone22)throughtheundampered openingsatceilinglevel.Thehotsmokewouldhavetoresultintheignitionofcombustible materialineitherFireZone49or50inordertospreadtoadjacentfirezones.Duetoautomatic detection andsuppression capabilities inadjacentzonescontaining safeshutdownequipment orcables,thisisnotconsidered acredibleevent.Intheshafts,productsofcombustion wouldtendtoaccumulate andmovedownwards andspreading outintoFireZones44A,44B,44Cand44D(forUnit1),44E,44F,44Gand44H(forUnit2)through-theundampered-openingsatceilinglevel.Productsofcombustion wouldthenbegintofilluptheheatexchanger cubiclespriortoenteringFireZone44Nthroughthesteelgratedoorwaysatthe609ftelevation.'his represents acircuitous pathforsmokeandhotcombustibles totakeinordertoimpactsafeshutdowncomponents.

Productsofcombustion couldaccumulate moreandmovedownwards intheshaft,fillingFireZone12(Unit1)orFireZone22(Unit2)beforeenteringotherfireareas.Thisalsorepresents acircuitous path.Therouteafirewouldhavetotakefromafireareaadjacenttoeitherairshaft,through'the airshaftandintoasecondfirearearepresents acircuitous path.Thefireareasadjacenttotheverticalairshaftsandtheairshaftsthemselves allhavecombustible loadingsofunder35,000Btu/ftforanequivalent fireseverityofunder25minutes.(6)(7)Detection and/orsuppression systemsexistintheadjacentfireareaswhicharecapableofdetecting and/orextinguishing afireandminimizing thedamagetosafeshutdownequipment andcables.Afireengulfing anyofthefireareasdirectlycommunicating withthetwoverticalairshaftshasbeenconsidered intheabovefireprotection andsystemsanalyses.

Afirein.anyofthesefireareaswillnotjeopardize thesafeshutdowncapability oftheplant.Page9-44 9.5FireZones70and73HatchEvaluation

~PuruseThepurposeofthisevaluation istoanalyzetheimpactofunratedfloorhatcheslocatedbetweentheHVACEquipment Rooms(FireZones70and73)andtheUnits'and2Main,ControlRooms(FireZones53and54)oneitherredundant safeshutdowncapability, thefixed.suppression exemption requestsfortheMainControlRoomscontained inSections7.11and7.12ofthisreportor,.engineering.

evaluation 9.2.and9.39.Athree-hour fire-rated.

hatchassemblyisnotcommercially available foruseinthislocation.

DescritionFireZones70and73aretheAuxiliary Building.

Thesealocatedonthe650ftelevation of.;firezonesarepartofa.larger-"

firearea(whichalsoincludesFireZones71and72-Unit1andi'ComputerRooms)directly, abovetheUnit1andUnit2Control-Rooms.TheunratedfloorhatchesprovideaccessfromtheUnits'and2ControlRoomstotheHVACEquipment Rooms.Eachhatchisprotected withalayerofpyrocrete onthesideofthehatchexposedtotheControlRooms.Allotherpenetrations ofthe""barriertotheControlRoomsareprotected withfire-rated material.

TheHVACductspassingthroughthefloorareprovided<

withfire-rated dampers.Page9-45 SafeShutdownEuimentThefireareadefinedby-FireZones70,71,72and73containsnosafeshutdownequipment, components orcables.FireProtection EuimentAutomatic areadetection isprovidedinFireZones70and7<3,,with automat'ic thermistor detection

'ndmanualdelugewaterspraysystemsforthecharcoalfilterunits.FireZones71and72havefullareadetection

.andautomatic Halonsuppression systems.FireAreas53and54arenotprovidedwithautomatic orfixedsuppression

-~system, butionization type'moke'detectors "are'""installed aboveandbelowthesuspended ceilingandmanualfirefightingequipment isavailable.

FireHazardsAnalsisFireZones70,-.71,72,and73haveacombustible loadingofunder47,000Btu/ftforanequivalent fireseverityofapproximately 35minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeareunder33,820Btu/ftand25minutesrespectively).

Theareacontains2automatic areadetection inallfourfirezonesandautomatic Halonsuppression systemsinFireZones71and72.ManualdelugewaterspraysystemsareprovidedforcharcoalfilterunitsinFireZones70and73.Theprobability offireinvolving bothhatchessimultaneously islow.Asaconsequence, theprobability offirespreading downintooneorbothunits'ontrol Roomsisalsolow.ShouldfirespreaddownintooneControlRoom,alternate safeshutdowncapability exists.Page9-46 Anotherconcernistheprobability ofafireoccurring inoneControlRoomandspreading upthroughtheunratedhatchesintoFireZones70or73andtraversedownthroughthehatchontheothersidetotheControlRoomoftheoppositeunit.Thecombustible loadingforFireArea53isunder47,000Btu/ftforanequivalent fireseverityunder35minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeare28,225Btu/ftand21.2minutes,respectively).

Thecombustible loadingforFireArea54isunder47,000Btu/ft2Iforequivalent fi.resever.ity

-.under.35minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeare30,069Btu/ftand22.6minutes).

Thereisnoother-communication pathbetweentheControlRoomsandHVACRooms.TheHVACductspassingthroughthefloorhaveratedfiredampers.Thehatchesareprotected with.alayerofpyrocrete.

Further-Itisunlikelythat'firecouldpropagate throughsuchainvolvebothunits'ontrol Roomstortuouspathundetected andmore,theControlRoomsareconstantly mannedandhaveareadetection aboveandbelowsuspended ceiling.TheHVACRoo'msabovehav'eautomatic areadetection andmanualsuppression systemsforthecharcoalfilterunits.simultaneously.

Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireinFireZones70,71,72and73wouldnotPage9-47 impairthesafeshutdowncapabilities ineitherunit.Inaddition, thisevaluation doesnotimpactonthebasesofthe'fixedsuppression exemption requestsfortheMainControlRoomortheEngineering Evaluation 9.2and9.39.Thebasesthatjustifytheconclusion aresummarized as"follows:

(2)FireZones70,71,72and73containnosafeshutdowncomponents orcables.FireZones70,71,72and73areprovidedwithdetection systems.FireZones71and72haveautomatic Halonsuppression systems.FireZones70and73havemanualdelugewaterspray'ystems'or thecharcoalfilterunits.(3)(4)-Thecombustible loadin~inFireZones70,71,72and73isunder47,000Btu/ftThe.hatches,although'otfire-rated, wouldlimitthepotential involvement offireareasatthe633ftelevation, withorwithoutthecoatingofpyrocrete appliedtoeach.(6)(7)TheControlRoomsareconstantly manned;theprobability offire'n.oneControlRoomresulting indamageintheotherControlRoomislow.Ahypothesized fireineitherunit"'sControlRoomwillbedetectedimmediately, anditcouldbeextinguished bymanualfirefightingequipment.

Acompletealternate safeshutdowncapability fortheControlRoomsexists.Therefore, fireinvolving eitherunit'sControlRoomwouldnotimpairthesafeshutdowncapability.

9.6601ftPieTunnelEvaluation (FireZone6A)~PuroseThepurposeofthisevaluation istoanalyzetheimpactofthe601ftelevation pipe.tunnelonredundant safeshutdownPage9-48 capabilities contained onthe587ftand609ftelevations.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.The601ftpipetunnel(designated asFireZone6A)providesapathofcommunication betweenFireZones5,6N,6M,6S,62A,62B,62C,63A,63B,63C,64A,64B,65Aand65Bonthe587ft"-elevation oftheAuxiliary BuildingandFireZones43,44Athrough44H,44Nand44Sonthe609ftelevation oftheAuxiliary Building.

FireZone~=37islocated<on.

the617ftelevation oftheAuxiliary Building.

The587,ftand609ft*elevations aredefinedasseparatefireareasintheMarch1983AppendixRsubmittal for'.C..Cook.

Aportionofthepipetunnelis"located

'onthe609ft"elevation

-directly beneathFireZone37.~Theportionofthepipe'-tunnelonthe609ftelevation isthemainentranceaccesspointintothetunnelitself.Figure9.6-1isaplanviewofthe587ftelevation, withtheshadedareaindicating wherethe601ftpipetunnelprotrudes downintothe587ftelevation.

Figure9.6-2isaplanviewofthe609ftelevation (withtheexception ofFireZone37,which"isactuallyatthe617ftelevation),

withtheshadedareaindicating wherethe601ftpipetunnelislocatedbelow.NotethattheportionofthepipetunnelbelowFireZone37isatthe609ftelevation, withtheremainder locatedatthe601ftelevation.

Figure9.6-3isablow-upofthe609ftelevation, Page9-49 withtheentranceaccessvestibule indicated asitexistsonthe609ftelevation andtheremainder oftheshadedarealocatedonthe601ftelevation.

Figure9.6-4isanelevation viewoftheAuxiliary Buildinglookingsouthwiththeshadedareaindicating thelocationofthepipetunnel.,.Access,is.gained,tothe;pipe-tunnelviaanormallylocked,keycardcontrolled

-steelelevation (seeFigure9.6-3).gateaccessdooratthe609ftAnentranceaccessvestibule in1theshapeofanoblong"T"islocatedjustinsidethesteelgateaccessdoor.Inthesouth"'all of-thest'em'of'the"T"'isan""unratedhollowmetal--.door which"provides accesstoaC-shapedwalkway,withthe'ongportionofthe"C"runningnorth-south.

Boththeentranceaccessvestibule andtheC-shapedwalkwayarelocated,onthe,609.ft"elevation directlyb'elowFireZone37.Ladderopenings.'are-provided

."inthenorthwest andsouthwest cornersoftheC-shapedwalkway'whichprovideaccesstothe601ftportionofthepipetunnel(seeFigures9.6-3and9.6-4).Onthe601ftelevation, thepipetunnelisarrangedintheformoftwoinvertedT's,withoneontheUnit1,ornorth,sideoftheAuxiliary

Building, andtheotherontheUnit2,orsouth,IsideoftheAuxiliary Building(refertoFigure9.6-3).ThestemofeachTrunseast-west fromtheladderopeningtothewestwalloftheAuxiliary
Building, withthetopsofbothT'sjoinedalongtheAuxiliary/

TurbineBuildingwall.ThestemofeachTrunsoveraportionoftheopenareaofFireZone5,thechargingpumpPage9-50 cubicles(FireZones62A,62Band62CforUnit1andFireZones63Aand63BforUnit2),thesafetyinjection pumpcubicles(FireZones64Aand64BforUnit1and65Aand65BforUnit2),FireZone6NforUnit1andFireZone6SforUnit2.ThetopsofbothT'straverseFireZone6N,FireZone6M,andFireZone6S.The601ftpipetunnelalsoabutsFireArea12,(thequadrant2pipingtunnelofUnit1),.FireArea22(thequadrant2pipingtunnelofUnit2),FireZones.80and84oftheTurbineBuilding, andthecorridortotheAuxiliary FeedPumpRooms(FireArea17C)locatedintheTurbineBuilding.

(referto,Figures9.6-1and9.6-3).Onthe609ftelevation, thepipetunnelrunsunderneath the617ftelevation ValveGallery(FireZone37.),theRHRandcontainment spraypumpheatexchangers (Fire.Zones44A-H)andthemain,openfloorareaofFireZones,44N and44S.Ahatchopening,providesaccessintothestemofeach'Tofthepipetunnelonthe609ftIelevation, withonehatchlocatedinFireZone44NandtheotherinFireZone44S(refertoFigure9;6-3).SafeShutdownEuimentThe601ftpipetunnelcontainsnosafeshutdownequipment, cables,orcomponents.'ire Protection EuimentAutomatic detection-andsuppression capabilities arenotprovidedinthe601ftpipetunnel.Withtheexception ofFireAreas12and22,FireZones37,44Athrough44H,andFireZones80and84oftheTurbineBuilding, automatic detection andPage9-51 suppression capabilities areprovidedinallareasandzonesabuttingthe601ftpipetunnel.FireZone5isprotected by,areadetection andautomatic drypilotpreaction sprinkler innormallyaccessible areaswiththeexception ofsmallportionsbetweenFireZones4and62Awhichisprovidedwithdetection

'only.Automatic suppression isprovidedinFireZones80and84.FireZone37hasareadetection intheT-shapedvestibule andcontainsnosuppression systemsandFireAreas12and22containfnoautomatic detection orsuppression capabilities.

The"T"shapedentranceaccess~vestibule atelevation"'609 ftofFireZone,~44Ndoesnotcontaindetection orsuppression capabilities.

The~'remaining

.portions.ofFireZone44Ncontaindetection and7~suppression systems.-

~'FireHazardsAnalsisTherearenegligible exposedcombustibles withineitherthe@609ftor601ftelevations ofthepipetunnel.Thereisalimitedamountofcableswithinthepipetunnel,buttheyareallinstalled withinrigidsteelconduit.Nopumpsor.motorsarelocatedwithinthepipetunnel;therefore, lubricating oilisnotcontained inthetunnelandisnotrequiredduringmaintenance operations.

Thepipetunnelisanormallylocked,highradiation area,anditdoesnot'rovideaccesstoanyotherplantlocations; therefore, thepotential forstorageand/ortransport oftransient combustibles inorthroughthepipetunnelislow.Basedontheseconsiderations, thefixedandtransient Page9-52 combustible loadinginthe601ftpipetunnelisunder13,000Btus/ftforequivalent "fireseverityunder10minutes(theactualcombustible loadingandequivalent fireseverityexistingatthis,timeare143Btu/ftandO.lminutesrespectively).

Therearethreeaccesspointsintothepipetunnel,withallthreeexistingonthe609ftelevation (refertoFigure9.6-5).Oneisasteelgate,normallylockedswingdoorwhichopensintotheentranceaccessvestibule onthe609ftelevation directlybelowFireZone37.Thisisthemainentranceaccesspointtothepipetunnel.From-">the:entrance accessvestibule, anunratedhollowmetalswingdoorprovidesaccesstotheC-shapedwalkway,andhence,.thetwoladderopeningsdowntothe601ftelevation ofthepipetunnel.Theother.twoaccesspointsarehatchopeningsinthefloorofthe609ftelevation whichopentothestemofeach"T"duewest'ofeachunit'ssealwaterheatexchanger cubicle.Thehatchopeningsareprotected bysteelplatehatchcoversthataresealedwithhighdensitylead(-150pcf)which,althoughnotfire-rated, actasradiation andsmokebarriers.

Therearenumerouspenetrations inthewalls,floor.,andceilingofthepipetunneltoadjacent.areasandzones.Theapproximate locationand,numberofpenetrations areasindicated inFigures9.6-5through9.6-15.Thelayoutofthe609ftIportionofthepipetunnelisindicated onFigure9.6-5,withthegenerallocationofpenetrations andthemethodofsealingthemPage9-53 indicated whereappropriate.

Theshadedpenetrations onFigures9.6-6,9.6-8and9.6-10havebeensealedwitheithersilicone'foam,highdensitylead,acombination ofthetwo,orbysteelplatehatcheswithhighdensityleadand/orven'tilation ductwork.

"Allpenetrations toFireAreas'2and22havebeensealedinthis-manner,alongwithallpenetrations intheceilingofthe601ft"portionofthepipetunneltoFireZones44Nand44Sabove(seeFigures9.6-6,9.6-8and9.6-10).Theremainder ofthepenetrations indicated onFigures9.6-5through9.6-14areopenandprovideap'otential pathfor"<communication betweenareas.and/orzonesabuttingthepipe'-tunnel.

Withtheexception oftheopeningstothechargingpump'cubicles (Fire*Zones 62A,.62B,62Cand63A,63Band63C)which".'will.he sealedwiththree-hour fire-rated

material, theremaining

'penetrations willnotbesealed.Thejusti'fication fornot'sealingtheremaining penetrations canbebrokendownintothreeinterrelated discussions.

Theyare:oCombustible LoadingoExistingDetection andSuppression oCommunication PathstoImpactonSafeShutdownEachisdiscussed withrespecttothepotential impactonsafeshutdowncapabilities inthepipetunnelandtheabuttingfireareasand/orzonesonthe609ftand587ftelevations oftheAuxiliary Building.

Page9-54 587ftElevation Onthe587ftelevation oftheAuxiliary

Building, FireZones5,6N,6M,6S,64A,64B,65A,65B,62A,62B,62C,63A,63Band63Cabutthepipetunnel.Thepenetrations tothecharging, pumpcubicles, FireZones62A,62B,62CandFireZones63A,63B,63C,willbeupgradedtoachieveathree-hour fireratingtherebyassuringtheintegrity ofthebarriertothepipetunnel.,Theremaining firezonesformasinglefireareawhichhasacombustible loadingandequivalent fireseverityofapproximately 27,000Btus/ftand,20.minutes,respectively.

(Theactual2combustible loadingandequivalent fireseverityexistingatthistimeare12,420Btu/ftand9.3minutesrespectively).

'igures9.6-7through9.6-15indicate.the'locations of"unprotected"

~~penetrations inthepipetunnelboundaries to"thezonesonthe'.587ftelevation whichabutit.Thefirezonesonthe587ftelevation thatabutthepipe-tunnelareprotected byareadetection andautomatic drypilotpreaction sprinklers.

FireZone5isprotected byareadetection andautomatic drypilotpreaction sprinklers innormallyaccessible areaswiththeexception ofsmallportionsbetween62AandFireZone4whichisprovidedwithdetection only.Thiscombination ofautomatic ionization detection forearlywarning'nd automatic preaction sprinklers forextinguishment ofanypotential fireswilllimitthefiredamage.Page9-55 Priortofireextinguishment, heatandsmokecanenterthepipetunnelthroughtheunsealedpenetrations indicated onFigures9.6-7through9.6-15.Anyheatandsmokeenteringthepipetunnelwouldbecooledbytheactuation ofthepreaction sprinklers.

Duetothelackofcombustibles withinthepipetunnelitself,afirecouldnotpropagate intothetunnelorinitiateanewfirewithin.thetunnelduetothemigration ofcooledsmokeandheatintothetunnel.Asallpenetrations toFireZones44Nand44Sonthe609ftelevation abovethepipetunnelaresealed,anyŽheatandsmoke'would haveto'fill.thetop'andstemofthe"T's"ofthetunnelandmigrateuptheladderopeningstothe609-ftportionof'thetunneltoimpactonFireZones44A-H,'4S,

.and44Nonthe:609ftelevation oftheAuxiliary, Building..

'Due-to.theprotection providedbythenormallyclosedunratedhollowmetaldoorfromtheC-shapedwa'lkwaytotheentranceaccessvestibule onthe609ftelevation, heatandsmokewouldhavetofillthevolumeoftheC-shapedwalkwaypriortomigrating outthroughtheopenpenetrations nearfloorlevelinitswestwalltotheentranceaccessvestibule.

Fromtheentranceaccessvestibule, smokeandheatwouldthenhavetomigrateoutintoFireZone44N.Toimpactonsafeshutdowncapability onthe609ftelevation, smokeandheatwouldthenhavetomigratethroughFireZone44NintoFireZone44Sandinitiateafireinbothzones.Threeconsiderations precludethisfromhappening.

FirstisthePage9-56 openstairwayuptothe650ftelevation, whichisapproximately 20ftwestoftheentranceaccessopeningtothevestibule.

(Thevestibule doesnotcontainsafeshutdownequipment.)

Smokeandheatwouldtendto'igrateupthisstairpriortotraveling furtherwesttoimpact'onFireZone44S.Secondistheexistingdetection andpreaction sprinkler.,

systemsonthe609ftelevation.

Shouldfireoccurasaresultofsmokeandheattraveling outtheaccessopening,'heearlywarningdetection

,systemwouldinitiatemanualfirefightingactivities whilethesuppression systems,would, rebegin..:,to controlandextinguish thefirepriortoimpacting on-FireZones44Nand44Ssimultaneously.

Third,andmostimportant, isthecircuitous paththatsmokeandheatwouldhavetotaketotravelfrom,the587ftelevation throughthepipetunneltoenterthe609'ft.elevation.

In.order.toimpactonthe609ftelevation, smokeandheatoriginating onthe587ftelevation wouldhavetostratifyattheceilinglevelofthe587ftelevation priortoenteringthepipetunnel.Smokeandheatwouldthenhavetomigratethroughthepipetunnelandpenetrate outintothe609ftelevation.

Assmokeandheatmigratesthroughthepipetunnel,"itwouldtendtocoolanddisperse, duetothelackofcombustible materials toprovideadditional fuelforthefire.Asaresult,reasonable.

assurance isprovidedthatsmokeandheatoriginating fromafireonthe587ft-elevation willnotbeabletomigratethroughthepipertunnelandadversely impactonsafeshutdowncapability onthe609ftelevation.

Page9-57 WithrespecttoFireAreas12and22,whichalsoabutthepipetunnelatthiselevation, thesamecircuitous pathanddetection andsuppression capabilities onthe587ftand609ftelevations exist.Inaddition, thecombustible loadinginFire'Areas12and22isunder20,000and13,000Btu/ftwithanequi-valentfireseverityofunder15andl0minutes,respectively, andallpenetrations tothepipetunnelareasealed.Theseconsiderations precludethepossibility ofafireineitherFireArea12or22fromimpacting onsafeshutdowncapability onthe587ftor609ftelevation.

Thepipetunnelhasminimalfixedortransient combustibles

that"couldeitherbetheinitialmaterialignitedorasecondary sourceforignitionasaresultoffireenteringthepipetunnel.'Therefore, thepipetunnelwill,itself,havenoimpactonsafe'shutdown capability withtheexception ofitfunctioning asapotential pathforf,irecommunication onandbetweenelevations oftheAuxiliary Building.

Duetothelocationofpenetrations inthewallsofthepipe,tunneltoFireZones6N,6M,and6Sonthe587ftelevation, thepotential existsforfire,smoke,and/orheattotraversethroughthepipetunneltobothUnit1andUnit2sidesoftheAuxiliary Building.

Thisisnotaworst-case scenarioduetothelackofcombustibles inthepipetunnelandtheexistence ofbarriers(eventhoughallpenetrations arenotsealed)betweenthepipetunnelandthe587ftelevation.

Theworst-case scenarioisaPage9-58 fireoriginating intheopenareaofFireZone6Mandmovingin1bothdirections toFireZones6Nand6S.Thisscenariohasalreadybeenconsidered intheMarch1983AppendixRsubmittal, whichhasbeenreviewedandapprovedbytheNRC.Therefore, firetransmission betweenFireZones6N,6M,and6Sthroughthepipetunneldoesnotrequirefurtherconsideration.

609ftand617ftElevations Onthe609ftelevation oftheAuxiliary

Building, FireZones44N,44S,and44Athrough44Habutthepipetunnel.FireZone37onthe617ftelevation islocatedabovethepipetunnel.ThesefirezonesandFireZone43,whichdoesnotabutthepipetunnel,makeupasinglefireareawhichhasafixedcombustible loadingofapproximately 47,000Btu/ftfor-anequivalent fireseverityofapproximately 35minutes.,(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare34,482Btu/ftand25.8minutes,respectively.)

Allpenetrations fromthefloorofthezonesonthe609ftand617ftelevation tothepipetunnelareprotected bysiliconefoam,highdensitylead,acombination ofboth,orsteelplatehatchcoverswithhighdensitylead.Theonlyotherpenetrations tothepipetunnelconsistofasteelgateaccessdoortotheentranceaccessvestibule, anunratedhollowmetalswingdoorfromthevestibule totheC-shapedwalkway,andtheunsealedpenetrations nearthefloorinthewestwalloftheentranceaccessvestibule.

ItismorelikelyforafireinFireZone44NPage9-59

'toattackthedooropeningsfirst,priortoimpacting onthe.sealedfloo'rpenetrations ortheunsealedpenetrations inthe'~westwalllocatednearthefloor.Aswiththe587ftelevation, "theexistingearlywarningionization detection systemoutside'theaccessvestibule inFireZone44Nwouldinitiatefire:fighting activities.

The,automatic preaction sprinkler systems(alsooutsidetheaccessvestibule inFireZone44N)wouldacttocontroland/orextinguish afire,therebyreducingthefiredamage.Basedontheexist-ing levelofdetection andsuppression, 4theamountofthecombustible loadingandequivalent fireseverityintheabuttingareasand/orzones(exceptFireZone43)approximately,40,000 Btu/ftand30minutes,respectively

.(the2actualcombustible.

loadingandfireseverity, existingatthis;timeare25,853Btu/ftand19minutes,respectively) andthe.,~location andprotection providedforthepenetrations tothepipetunnel,thereisreasonable assurance thatfireinabuttingzonesonthe609ftand617ftelevations willnotadversely impactonthepipetunnelitself.Inaddition, heatandsmokefromafireonthiselevation wouldtendtoriseuptotheceilingofthe609ftand617ftelevat.ions priortostratifying downtothelevelofthedoorandpenetration openingsintothepipetunnel.Conclusion Basedonthepreviousevaluation, reasonable assurance canbeprovidedthatafireonthe587ftelevation oronthe609ftPage9-60 elevation inthepipetunnelwillnotadversely impactonsafe~~~shutdowncapabilities.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebases.whichjustifythisconclusion aresummarized asfollows:Therearelowexposedfixedortransient combustibles.

locatedwithinthepipetunnel;therefore, firecannoteitherinitiatei:nthetunnelorresultinthetunnelasaresultofafireinadjacentareasand/orzones.(2)Thecombustible elevations areequivalent firerespectively.--.

loadingsonth~587ftand609ft27,000Btu/ftand47,000withseverities of20and35minutes,(3)(4)Automatic detection

'andpreaction sprinkler systemsare'rovided inmostportionsofthezonesabuttingthepipetunnelwithunsealed'penetrations;

'ireZone37'asareadetection only;andFireAreas12,22andFireZone44Npipetunnelvestibule:

whichabutthe"pipe:

tunnelanddonotcontaindetection orsuppression capabilities, havelowfireloads.Allpenetrations tothechargingpumpcubicles'for Unit.1(FireZones62A-C)andUnit2.(FireZones63A-C)fromthepipetunnelwillbesealedwiththree-hour-rated'aterial.

(5)TheMarch1983AppendixRsubmittal, whichhasbeenreviewedandapprovedbytheNRC,proposedmodifications topreventfireinonezoneofthe587ftelevation fromadversely impacting onalternate shutdowncapabilities inotherzonesofthe587ftelevation; therefore, theimpactoffireoccurring in"onezoneofthe587ftelevation andspreading tootherzonesofthesameelevation neednotbefurther'ddressed.

(6)Dueto(1)thecircuitous pathwhichfiremusttakefromthe587ftelevation throughthepipetunnelandontothe609ftelevation toimpactonredundant safeshutdowncapabilities onthe609ftelevation, (2)thecoolingactionofthesuppression systemsonboth.elevations, and(3)lackofcombustible withinthepipePage9-61 tunnel,reasonable assurance isprovidedthatsafeshutdowncapability onthe609ftelevation willnotbeadversely impactedbyafireonthe587ftelevation.

(7)Separating thepipetunnelfromeitherthe587ftor609ftelevations willnotenhancetheprotection providedbytheexistingconfiguration andproposedmodifications.

9..7.FireArea13andFireArea14BoundarEvaluation

~PutoseThepurposeofthisfireareaboundaryevaluation istodetermine theimpactonredundant safeshutdowncapability ofanunratedfieldfabricated

.fusiblelink.guillotine "type,damper-presently locatedbetweenFireAreas13"(Unit1DieselOilPumpRoom)and-14(Unit1Transformer Room).Inaddition, thisevaluation doesnot-.adversely impactonotherevaluations orexemption requestscontained inthisreport.'ire Areas13and14arelocatedonthe587and591ftelevations oftheAuxiliary

.Building.

AccessisprovideddirectlyintoFireArea14fromtheTurbineBuilding(FireZone79),whileaccesstoFireArea13isviathe1CDDieselGenerator Room,FireArea15.Anunrated,fieldfabricated firedamperconstructed of3/8-in.platesteelisprovidedinanHVACopeninginthecommonwallseparating FireAreas13and14.SafeShutdownEuimentThesafeshutdowncomponents contained inFireArea13arethedieselgenerator fueloiltransferpumps1CDl,lCD2,2CDl,2CD2andtheirassociated powercables.Page9-62 FireArea14containscablesassociated withbothdieselge'nerator testbreakers(ACB1DGTAB;and1DGTCD).Inaddition, thepressurizer heater4kVl4'80V transformers andtheirassociated primaryandsecondary powercablesarelocatedinFireArea14.Thesetransformers provide480Vpowertothepressurizer heaters.Thepressurizer heatersandtheirassociated transformers arenotrequiredforsafeshutdownoftheunit,however,.theheaterswereincludedintheoriginalanaly'sis fortheMarch1983submittal forplantoperational flexibility.

  • FireProtection Euiment,Presently, FireArea14doesnotcontainafiredetection (i.e.,ionization orinfrared) system.Section8'ofthisreport;however,doesindicatethatafire'.detection

-'systemwillbeinstalled inFireArea14providing remotealarmsintheControl<Room.Automatic firedetection

'andcarbon~dioxide supp'ression.

systemsareprovidedforFireArea-13whichhasafireseveritpofunder30minutes(the.actualfireseverityexistingatthistimeisunder19minutes).

WhileFireArea14doesnothaveanautomatic suppression system,itdoescontainmanualfirefightingequipment andhasafireseverityoflessthan10~minutes(theactualfireseverityexistingat.thistimeisless~than1minute).FireHazardsAnalsisFireArea13containsSafeShutdownComponents 1CD1,lCD2,--2CD1and2CD2fueloiltransferpumpsandtheirassociated powerPage9-63 cables.Lossofthesecomponents andcableswouldresultinasubsequent lossofcapability "oftransferring fueloilfromtheUnit1"CD"fueloiltanktotheUnit1andUnit2"CD"dieselgenerators.

However,therearenoeffectsonthecapability oftheUnit1andUnit2"AB"dieselgenerators.

Thisresultsinonetrainofsafeshutdowncomponents beingfreeoffiredamage.FireArea14containsthepressurizer heater4kV/480Vtransformers, TRllPHAandTRllPHC,andtheirassociated primaryandsecondary powercables.Thelossofthesecomponents andcablesresultsin~thelossofallpressurizer-heater':groups.

(i;.e.,backupandcontrolgroups).Thepressurizer heatersarenotrequiredforsafeshutdownandasdiscussed inSection6oftheMarch.1983submittal, modification havebeenrecommended torepowerthepressurizer.

heatersfromtheunaffected unit.Varioussafeshutdowncablesassociated withtheUnit1dieselgenerator "CD"arealso'outedinFireArea14.Thesecableswouldbelostintheeventofafireanddieselgenerator "CD"would,not beavailable.

Inaddition, FireArea-14containscablesassociated withbothdieselgenerator testbreakers(ACB1DGTABand1DGTCD).The4160Vpowercablesrunningfromtheupstream4kVcircuitbreakerstoACB1DGTABandACBlDGTCDcouldfailintheshortedcondition.

Thiswouldresultinthedieselgenerators beinginoperative andwouldrequirecompletealternative shutdownfromUnit2intheeventofafire.Page9-64 Onthebasisoftheabove,consolidating FireAreas13and14wouldresultinthelossof3outof4dieselgenerators.

Theonlyoperabledieselgenerator wouldbetheUnit2"AB"diesel.tSincebothan"AB"anda"CD"trainassociated pumpisrequiredforthecomponent coolingwaterandessential servicewatersystems,onedieselgenerator

's.notsufficient

.tosafelyshutdownbothunits.Thisprecludes anyconsolidation ofFireAreas13and14.IfFireAreas13and14cannotbeconsolidated, thentheonly,"alternative

'.is~to.:qualify-.-

the.afieldfabricated damperbetweenthetwofireareas.FactoryMutualhaspublished astandard, "LossPrevention Data"Section1-45,which-appliestoairduct,.systems.

Theobjectives ofthestandardare:(1)Torestrictthespreadof.fire,.smoke,"

andheatthrough=-

air-cond,itioning systemsfromone--fireareatoanotherorintoabuildingfromoutside.(2)Tomaintainthefireresistive..integrity ofbuilding'lements, suchasfloors,walls,andcolumnsaffectedbytheductsysteminstallation, byminimizing ignition'sourcesand combustibility oftheelementsoftheductsystem.(3)Todiscusstheuseofairductsystemsfortheadditional purposeofemergency smokecontrol.Thestandardprovidesdesignguidanceandrecommendations",

forductsystemsincluding

.locationandminimumdesign.requirements forfiredampers.Inreviewing theFactoryMutualsystemspecifications Section1-45"LossofPrevention Data"page.3,Item2under"Recommendations" states:Page9-65 Whereverductspassthroughinteriorfirecutoffsofthree-hour ormorefireresistance ratings,openings18in.(455mm)ormoreindiameteroronlongestsideshouldbeprotected byadoorarrangement havinganoverallfireratingofthreehours.Atopeningsinsuchcutoffsnotexceeding 18in.(455mm)indiameteroronlongestside,1/8-in.(3.2mm)steelplatesmaybeused.Thefieldconstructed damperislessthan18inchesonitslongestsideandis3/8-in.thicksteelplate.ItmeetstheFactoryMutualrequirements forprotection ofopeningsnottohaveathree(3)hourfir'erating.Basedonthisguidance, theexisting-3/8-in.thickfusible-link actuatedsteelplateprovidesadequateprotection fortheventilation openingintheCbarriercommontoFireAreas13and14.Inadditiontotheexceeding 18-in.onthelongestsidelocatedinbarriersrequiredfusiblelink,thedamperisprovidedwithaCO2popoffdevicevhichvillclosethedamperuponactuation oftheCO2systeminFireZone13.Therefore, theseasindividual fireareas.Conclusion twofireareascanbeconsidered Basedonthepreviousevaluation, theexistingcarbondioxideactuateddamperlocatedbetweenFireAreasl3and14isanacceptable deviceformaintaining theratingofthefireareaboundary.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thesebasesthatjustifythisconclusion aresummarized asfollows:Page9-66 (1)FireAreas13and14cannotbeconsolidated intoasinglefireareaonthebasisthatthepotential lossofthreeoutoffourdieselgenerators wouldjeopardize thesafeshutdowncapabilities oftheplant.'2)

Theexistingdampermeetstherequirements oftheFactoryMutual'ystem specifications forfiredampers.'3}

Afterthemodifications recommended intheMarch1983submittal arecompleted, bothFireAreas13and14willcontainautomatic firedetection systems.-

e(4)FireArea13presently isprovidedwithanautomatic carbondioxidesuppression systemwhichwouldquicklyextinguish afireinthisarea.FireArea14hasbeenprovidedwithmanualfirefightingequipment andhasanequivalent fireseverityoflessthan10minutes(theactualfireseverityexistingatthistimeislessthan1minute).(5)SinceFireA~ea14has,acombustible loadingofunder13000Btu/ft,'hisareaisnotaprimarysourceoffire.(6)Replacing theexisting3/8-in.:"thicksteelplatedamperwithathree-hour-rated damperwouldnotenhancethe,protection providedby'theexisting"configuration.

e9.8FireArea21andFireArea20BoundarEvaluation

~Purose'Thepurposeofthisfireareaboundaryevaluation istodetermine theimpactonredundant

.safeshutdowncapability ofanunratedfieldfabricated fusiblelinkguillotine typedamperpresently locatedbetweenFireAreas21(Unit2DieselOilPump-Room)and20(Unit2Transformer Room}.Inaddition, this"evaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-67 DescritionFireAreas20and21arelocatedonthe587and591ftelevations oftheAuxiliary Building.

AccessisprovideddirectlyintoFireArea20fromtheTurbineBuilding(FireZone85),whileaccesstoFireArea21isviathe2ABDieselGenerator Room,.FireArea-19.;-Anunrated,fieldfabricated firedamperconstructed of3/8-in.:platesteelisprovidedinanHVACopeninginthecommonwallseparating Fir'eAreas20and21.SafeShutdownEuimentThesafeshutdowncomponents contained i'n'FireArea21arethedieselgenerator, fuel"oiltransfer.pumpslABl,lAB2,2AB1,2AB2andtheirassociated powercables.FireArea20.containscablesassociated withbothdieselgenerator testbreakers(ACB'DGTABand2DGTCD).Inaddition, thepressurizer=heater 4kV/480Vtransformers andtheirassociated primaryandsecondary powercablesarelocatedinFireArea20.Thesetransformers provide480Vpowertothepressurizer heaters.Thepressurizer heatersandtheirassociated transformers arenotrequiredforsafeshutdownoftheunit,however,theheaterswereincludedintheoriginalanalysisfortheMarch1983submittal for,plantoperational'lexibility.

FireProtection EuimentPresently, FireArea20doesnotcontainafiredetection (i.e.,ionization orinfrared) system.Section8ofthisreport,however,doesindicatethatafiredetection systemwillbePage9-68 installed inFireArea20providing remotealarmsintheControlRoom.Automatic firedetection andcarbondioxidesuppression systemsareprovidedforFireArea21whichhasafireseverityofunder35minutes(theactualfireseverityexistingatthistimeisunder21minutes).

WhileFireArea20doesnothaveanIIautomatic suppression system,itdoescontainmanualfirefightingequipment andhasafireseverityoflessthan15minutes(theactualfireseverityatthis.timeisapproximately 1minute).FireHazardsAnalsisFireArea21containsSafeShutdownComponents lAB1,1AB2,2ABland2AB2fueloiltransferpumpsandtheirassociated powercables..Lossofthesecomponents andcables,wouldresultinasubsequent lossofcapability of,transferring fueloilfromtheUnit2"AB"fueloiltanktotheUnit1'ndUnit 2"AB"'diesel generators.

However,therearenoeffectsonthecapability oftheUnit1andUnit,2"CD"dieselgenerators.

Thisresultsinonetrainofsafeshutdowncomponents beingfreeoffiredamage.FireArea20containsthepr'essurizer heater4kV/480Vtransformers, TR21PHAandTR21PHC,andtheirassociated primaryandsecondary powercables.Thelossofthesecomponents andcablesresultsinthelossofallpressurizer heatergroups(i.e.,backupandcontrolgroups).Thepressurizer heatersarenotrequiredforsafeshutdownandasdiscussed inSection6oftheMarch1983submittal modifications havebeenrecommended toPage9-69 repowerthepressurizer heatersfromtheunaffected unit.Inaddition, FireArea20containscablesassociated withbothdieselgenerator testbreakers(ACB2DGTABand2DGTCD).The4160Vpowercablesrunningfromtheupstream4kVcircuitbreakerstoACB2DGTABandACB2DGTCDcouldfailintheshortedcondition.

Thiswouldresultinthedieselgenerators beinginoperative andwouldrequirecompletealternative shutdownfromUnit1intheeventofafire.Onthebasisoftheabove,consolidating FireAreas20and21wouldresultin'he'-lossof.3outof4dieselgenerators.

The-onlyoperabledieselgenerator wouldbetheUnit1"CD"diesel.Sincebothan"AB"and,,a"CD"trainassociated pumpisrequired'forthecomponent coolingwaterandessential servicewatersufficient

'tosafel-'systems, "onediesel'enerator isnotY.'-shutdown bothunits.Thisprecludes anyconsolidation ofFire.Areas20and21.IfFireAreas20and21cannotbeconsolidated, thentheonlyalternative istoqualifythefieldfabricated damperbetweenthetwofireareas.FactoryMutualhaspublished astandard, "Loss'revention Data"Section1-45whichappliestoairductsystems.Theobjectives ofthestandardare:(1)"Torestrictthespreadoffire,smoke,andheatthroughair-conditioning systemsfromonefireareatoanotherorintoabuildingfromoutside.(2)Tomaintainthefireresistive integrity ofelements, suchasfloors,walls,andcolumnsbytheductsysteminstallation, byminimizing sourcesandcombustibility oftheelementsofsystem.buildingaffectedignitiontheductPage9-70 (3)Todiscusstheuseofairductsystemsfortheadditional purposeofemergency smokecontrol."

Thestandardprovidesdesignguidanceandrecommendations forductsystemsincluding locationandminimumdesignrequirements forfiredhmpers.Inreviewing theFactoryMutualSystemspecifications Section1-45"LossPrevention Data,"Page3,Item2,under"Recommendations" states:"Wherever ductspassthroughinteriorfirecutoffsofthree-hour ormorefireresistance ratings,openings18in.(455mm)ormoreindiameteror~onlongestsideshouldbeprotected byadoorarrangement havinganoverallfireratingofthreehours.Atopeningsinsuchcutoffsnotexceeding 18in.(455mm)indiameteroronlongestside,1/8in.(3.2mm)steelplatesmay'beused."Thefieldconstructed damperislessthan18in.onitslongestsideandis3/8in.thicksteelplate.Itmeetsthe,FactoryMutualrequirements forprotection ofopeningsnotexceeding 18in.onthelongestsidelocatedinbarriersrequiredtohaveathree-hour firerating.Basedonthisguidance, theexisting3/8-in.thick.fusible-link actuatedsteel,plateprovidesadequateprotection fortheventilation openinginthebarriercommontoFireAreas20and21.Inadditiontothefusiblelink,thedamperisprovidedwithaC02popoffdevicewhichwillclosethedamperuponactuation oftheC02systeminFireZone21.Therefore, thesetwofireareascanbeconsidered asindividual fireareas.Page9-71 Conclusion Basedonthepreviousevaluation, theexistingcarbondioxideactuateddamperlocatedbetweenFireAreas20and21isanacceptable deviceformaintaining theratingofthefireareaboundary.

Inaddition, thisevaluation doesnotadversely impact,onotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)FireAreas20and21cannotbeconsolidated intoasinglefireareaonthebasisthatthepotential lossofthree"out

'offourdieselgenerato'rs wouldjeopardize thesafeshutdowncapabilities oftheplant.(2)Theexistingdampermeetstherequirements oftheFactoryMutualSystemspecifications forfiredampers.(3)Afterthemodifications recommended intheMarch1983submittal arecompleted, bothFireAreas20and21willcontainautomatic firedetection systems.(4)FireArea21presently is-providedwithanautomatic

,carbondioxidesuppression systemwhichwouldquicklyextinguish afireinthisarea.FireArea20hasbeenprovidedwithmanualfirefightingequipment andhasanequivalent fireseverityof15minutes(theactualfireseverityexistingatthistimeisapproximately 1minute).(5)SinceFireArea20)asalowcombustible loadingofunder20,000Btu/ft,lessthan15minutesfireseverity, thisareaisnotaprimarysourceoffire.(6)Replacing theexisting3/8-in.thicksteelplatedamperwithathree-hour-rated damperwouldnotenhancetheprotection providedbytheexistingconfiguration.

9.9FireAreaContainin FireZones3,32,36,48,and69andFireAreaContainin FireZones49,5051,and52BoundarEvaluation~FuroseThepurposeofthisevaluation istodetermine iftheabovefirearea's.canbeconsolidated intoonefireareaandnotPage9-72 adversely impactonredundant safeshutdowncapability.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.TheMarch1983submittal "SafeShutdownCapability Assessment andProposedModifications" to10CFR50,AppendixR,SectionIII.G.identified FireZones3,32,36,48,and69asonefirearea,andFireZones49,50,51,and52asaseparatefirearea.Theabovedefined.fireareasarecommunicating witheachotherthroughunratedbarrierpenetrations, undampered HVACductsandairintakeandexhaustplenums.Safe'Shutdown EuimentThefireareaconsisting ofFireZones3,32,36,48,and69doesnotcontainanysafeshutdowncomponents and/orcablesinFireZones3,36and48.FireZone69containstheUnit1andUnit2CCWsurgetankmanualisolation valves.FireZones32and69containcablesassociated withtwooftheUnit1safetyinjection accumulator isolation MOVS.FireZone69alsocontainsUnit1cablesassociated withtwopressurizer PORVs,twopres-surizerblockvalves,tworeactorheadventvalvesandtwopost-accidentsamplingvalves.Thefireareaconsisting ofFirePage9-73 Zones49,50,51,and52containssafeshutdowncomponents and/orcablesinFireZones50,51and52.Thecompliance methodinthisfireareaispresented inTable1-1.FireProtection EuimentFireZones32,48and69areprovidedwith.ionization smokedetectors andpartialdetection coverageisprovidedinFireZone'"3.Drypilotpreaction suppression systemsareprovidedinFireZone32andpartialcoverageisprovidedinFireZone3.Inaddition, FireZone69isprovidedwithanautomatic thermistor detection systemand.ma'nualdelugesystemfortheHVACcharcoal:.'filter units.FireZones49,50,51,and52areprovidedwith~automatic fireprotection

features, specifically areaionization e'smokedetection andeachcharcoalfilterunitisprovidedwitha~manualdelugesystem"withanautomatic thermistor detection system.Anautomatic drypilotpreaction suppression systemis'provided inthenormally'accessible areasofFireZones51and52.FireHazardsAnalsisTheequivalent fireseverityinthefireareacontaining FireZones'3,32,36,48and69is15minutes(theactualfire-severityexistingatthistimeis5minutes)andinthefireareacontaining FireZones49,50,51and52is35minutes(theactualfireseverityexistingatthistimeis21minutes).

Theequivalent fireseverityofthecombinedfireareasis25minutes(theactualfireseverityexistingatthistimeis12minutes).

Page9-74 TheMarch1983Submittal "Safe-Shutdown Capability Assessment andProposedModifications" to10CFR50,AppendixR,SectionIII.G.,generically identified forallareasoftheplantforthesafetyinjection accumulator valvesto.bemanuallyoperatedforcoldshutdownandforthepressurizer PORVs,reactorheadventvalves,andthepost-accident samplingvalvestobedeenergized toafailsafeposition.

RefertoSection4.4.5andTable4-3respectively.

Sincethesetwomanualactionscanbeperformed independent ofanyfireareawithintheplant,combining thetwofireareasintoasinglefireareawouldnotimpairsafeshutdowncapability or.changethecompliance strategyforeitherfirearea.Aa'resultnoadditional safeshutdowncomponents orcablesneededtobeevaluated beyondwhatwasanalyzedintheoriginalsubmittal.

Conclusion Basedonthepreviousevaluation, combining FireZones3,32,36,48,69,49,50,51and52intoasinglefireareawouldnotadversely impactonredundant safeshutdowncapability.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.The'aseswhichjustifythisconclusion aresummarized asfollows:(1)Combining FireZones3,32,36,48,49,and69withFireZones49,50,51,and52toformonefireareawouldnotimpairsafeshutdowncapability.

(2)Manualactioncanbetakenindependent ofthefireareasofconcerntomitigatetheconsequences ofanypossiblespuriousactions.Page9-75 (3)Thesafetyinjection accumulator valvescanbeclosedmanuallyforcoldshutdown.

(4)FireZones32,50,51,52and69,whichincludesafeshutdowncomponents and/orcircuits, areanalyzedandcompliance methodsareidentified inSection1ofthisreport.(5)Thecombustible loadinginFireZones3,32,36,48,and69is"under15minutes.FireZones32,48and69areprovidedwithionization smokedetectors, withpartialcoverageinFireZone3.FireZones3and32areprovidedwithautomatic drypilotpreaction sprinkler systems,withpartialcoverageinFireZone3.FireZones36and69containtransient combustibles, butsincebothofthesezonesarecontrolled accessareas,transient combustibles donotpresentaproblem.(6)Anautomatic drypilotpreaction suppression systemisprovidedinthenormallyaccessible areasofFireZones51&52.(7)Manualdeluge.waterspraysystemisprovidedforthecharcoalfilterunitslocatedinFireZone52.(8)Upgrading theboundarybarrierseparating FireZones3,32,36,48,and69fromFireZones49,50,51,and52willnotsignificantly enhancethesafeshutdown.

capability ortheprotection affordedbytheexistingconfiguration.

9.10FireArea43andFireZone44NBoundarEvaluation

'~PuroeeThepurposeofthisevaluation istoanalyzetheimpacton.redundant safeshutdowncapability ofcombining FireArea43withthefireareaconsisting ofFireZones44N,44S,44Athrough44H,and37.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-76 TheMarch1983submittal, "SafeShutdownCapability Assessment andProposedModifications" to10CFR50,AppendixR,SectionIII.Gidentified theaccesscontrolareaasaratedfirearea(FireArea43).FireArea43hasbeenreclassified asafirezoneandisnowconsidered partofthefireareacontaining FireZones37,44Athrough44H,44Sand44N.Theconsolidation ofFireZone43intotheabovedefinedfireareawasmadeasaresultofunratedbarrierpenetrations communicating withFireZone44N.SafeShutdownEuimentFireArea43doesnotcontainanysafeshutdown.

components; however,powercablesto600VMCCs.AM-A.and'AM-DofUnit1.traversethroughthisarea.Lossofthese,powercableswouldresultinasubsequent

.lossofpowertotheUnit,lcomponent coolingwater(CCW)pumpsuctionvalves(CMO-411and413)andCCWheatexchanger outletvalves(CMO-410and420).Inaddition, powerislosttotheUnit1CCWheatexchanger 15Eessential servicewaterinletandoutletvalves(WMO-731and733).FireProtection EuimentAutomatic orfixedsuppression featuresarenotprovidedinFireArea43,butionization typesmokedetectors areinstalled'nd manualfirefightingequipment isavailable.

FireZones44Nand44Sareprovidedwithfullareaautomatic drypilotpreaction sprinklers andionization detectors innormallyaccessible locations ofeachzone.Page9-77 FireHazardsAnalsisAvailable manualoperation ofUnit1CCWpumpsuctionvalve44S(CMO-413) andCCWheatexchanger 15Woutletvalve44N(CM0-420),

locatedinFireArea44,willallowaliqnment ofthecoolingwaterflowpathfortheUnit1centrifugal chargingpump(-pp-5OW).

Remoteoperational capability ofotherhotsafeshutdownsystemcomponents isnotaffectedbyafireinFireZone43.ThezoneadjacenttoFireZone43is44Nand,asdescribed inthisreport,FireZone44Nistobeprovidedwithalternate shutdowncapability outsideofthe'firezone..Thecablestraversing FireZone43(powerfeedstoAM-AandAM-D)arealsoroutedthroughFireZone44N.Thus,themethodofsafeshutdownforFireZone44Ntakesintoaccounttheexistence of.;thesepowerfeedsto'M-AandAM-DMCCsandthus,consolidating FireZone43-intothefireareacontaining FireZone44Nhasnoimpactonsafeshutdown,capability.

Manualoperation oftheaffectedvalvesassociated withthetwomotorcontrolcentersisavailable andconsidered inbothfirezones(43and44N).Thus,safeshutdowncondition canbeachievedandmaintained byperforming manualoperation ofotherrequiredsafeshutdowncomponents fromoutsideofthefirezone.Conclusions Basedonthepreviousevaluations, combining FireArea43intoalargerfireareathatincludesFireZones37,44N,448,Page9-78 Oand44Athrough44Hwillnotadversely impactonredundant safeshutdowncapability.

Inaddition, thisevaluation willnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesforthisconclusion aresummarized asfollows:(l)Combining FireZone43(formally FireArea43)intothesamefireareacontaining FireZone44Nwouldnotimpairsafeshutdowncapability.

(2)Thecombining ofFireZone43intothefireareacontaining FireZone44Nwillnotaddmoresafeshutdowncomponents, circuitsandcablesabovethosealreadyexistinginFireZone44N.',gnp~q(3)FireZone44N,whichincludesthecomponents, circuitsandcablesrequiredforsafeshutdown, isprovidedwithautomatic preaction sprinklers andsmokedetectors.

(4)Firepropagation fromFireZone44NtoFireZone43wouldnothaveadetrimental impactonthesafe,shutdowncapability.

(5)FireZone43isprovided.with.manual.firefightingequipment andsmokedetectors.

Transient combustibles doexistinthearea,butsince-FireZone43iscontinuously manned,transient "combustibles donotpresentaproblem.(6)'The'.walls andceilingsbetweenFireZones43and44N,althoughnotfire-rated, wouldlimitthepotential involvement ofFireZone44NasaresultofafireinFireZone43.(7)Upgrading theboundarybarrierseparating FireZones43and44Nisnotrequiredascombining thesetwozonesintoalargerfireareadoesnotimpactonthesafeshutdowncapability.

Page9-79 9.11Units1and2TurbineBuildin,MainSteamPieTunnelsandServiceOfficeBuildinEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofcombining theTurbineandServicelOffice Buildings andtheUnit1andUnit2mainsteampipetunnels(FireZones108,109,110andill)intoonefirearea.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.IntheMarch1983AppendixRsubmittal, ten(10)separatefireareaswereidentified intheTurbineBuilding.

Seven(7)ofthefireareasweremadeupofindividual firezones.'Theywereidentified asFireAreas78,-83,88and89onthe591ftelevation, andFireAreas94,95,and100onthe609ftelevation.

Theremaining three(3)fireareasconsisted ofmultiplezonesonvariouslevelsoftheTurbineBuilding.

Onefireareaconsisted ofFireZones112,113,114,and115;asecondconsisted ofFireZones2,77,79,80,81,82,90,91,92,93,126,and127(theUnit1sideoftheTurbineBuilding);

thethirdconsisted osFireZones84,85,86,87,96,97,98,99,124,125,and128(theUnit2sideoftheTurbineBuilding).

Page9-80 Duringthecourseof-theongoingAppendixRconsolidation effort,,severalinconsistencies werenotedbetweentheprotection providedfortheboundaries oftheidentified fireareasandNRCcriteriacontained withinvariousdocuments (mostnotablyGenericLetter83-33).Onesuchinconsistency wasunratedwatertightdoorsandunprotected ventilation openingsinthewallseparating 1,FireZones112and113fromFireZone2,whichwereidentified asIbeinginseparatefireareas.Asecondinconsistency wasanunprotected open'stairway inthefloor/ceiling assemblyseparating FireZone2fromFireZone84,whichwereidentified asbeinginseparatefireareas.Athirdinconsistency was'nrated doorassemblies andunprotected openingsbetweenthemain'team pipetunnels(FireZones110andillforUnit1'ndUnit2,respective'ly) andfirezones"intheTurbineBuildingfireareas(FireZones80and91forUnit1andFireZones,84and96forUnit2).Inadditiontotheinconsistencies intheboundaries of'reviously identified fireareas,thoseplantlocations whichwerenotidentified intheMarch1983submittal (nofirezonesorNFZ's)presented problemsSpecifically, withjustifying thefireareatheTurbineDeckonthe633ft-elevation isopentoboththeUnit1andUnit2TurbineBuildingBuilding-fireareatothenorth.Theseplantlocations arenowidentified asFireZones129,130,and131,respectively.

.fireareasandtheServiceBuildingabutstheUnit1TurbinePage9-81 SafeShutdownEuimentFireZone108containsthefollowing safeshutdownequipment andtheirassociated cables:(1)Unit1steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and.3;(3)Steamgenerators 2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit1turbine-driven AFWpumpsteamsupplyisolation valves.FireZone109containsthefollowing safeshutdownequipment andtheirassociated cables:(1)Unit2steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and3;(3)Steamgenerators 2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit2turbine-driven AFWpumpsteamsupplyisolation valves.Redundant safeshutdowncapability isavailable forbothFireZone108andFireZone109outsideofthefireareainwhichtheybotharelocated.Therefore, firecouldinvolvebothFireZones108,and109withoutimpacting onredundant safeshutdowncapability.

FireZones112,113,114and115containtheSWcross-connectandDGcoolingvalves.andassociated cables.VarioussafeshutdowncablesareroutedthroughFireZones79,80,84,85,91and110.Thegreentrai'ncablesinFireZones79and85areprotected toensureonetrainofredundant systemsisavailable intheeventofafireengulfing Unit1orUnit2TurbineBuilding.

Page9-82 FireProtection EuimentFireZones79and85areprotected byautomatic detection andwetpipesprinklers systems.Automatic wetpipesprinkler systemsareprovidedinFireZones77through94andFireZones96through99.Automatic thermistor, detection andC02suppression areprovidedinFireZones83,88,=95and100,withdrypilotpreaction sprinkler systemsprovidedinFireZones95and100.TheturbinesinFireZones129and130areprovidedwithautomatic thermistor detection andmanualdelugesuppression undertheappearance lagging,anddrychemicalsuppression fortheturbinebearings.

FireZone124,125,126,and127containvariouslevelsofautomatic detection andsuppression capabilities.

~~FireHazardsAnalsisInordertoresolveboththeinconsistencies betweenpreviously identified fireareasandtheimpactoftheNFZ's,anAppendixRsafeshutdownanalysishasbeenperformed withrespecttocombining theselocations intoasinglefirearea.Theresultsarethefollowing:

(a)WhenUnit1MainSteamPipeTunnelArea(FireZones108and110)iscombinedwithTurbineBuildingArea,Unit1canbesafelyshutdownbyusingUnit2EastAuxiliary Feedwater Pump.Thisalternate shutdownactionwillberequiredwhenafirepropagates betweenFireZones108and79.Forafiretopropagate betweenthesefirezones,thefirewouldhavetobeofsufficient durationandintensity toengulfFireZones110and80(FireZone80isprotected byanautomatic sprinkler system).Page9-83 (b)WhenUnit2MainSteamPipeTunnelArea(FireZones109and111)iscombinedwithTurbineBuildingArea,Unit2canbesafelyshutdownbyusingUnit1EastAuxiliary Feedwater Pump.Thisalternate shutdownactionwillberequiredwhenafirepropagates betweenFireZones109and85.Forafiretopropagate betweenthesefirezones,thefirewouldhavetobeofsufficient durationandintensity toengulfFireZonesill,and84(FireZone84isprotected byanautomatic sprinkler system).*(c)WhenbothUnit1andUnit2MainSteamPipeTunnelareasarecombinedtogetherwiththeTurbineBuildingintoonefirearea;'safeshutdownisnotimpactedforeitherunit.Inthehighlyunlikelyeventofafireinvolving alloftheabovementioned firezones,bothunitscanbesafelyshutdownusingoppositeunitsAuxiliary Feedwater Pumps.Forthisfirescenario, onetrainoftheothersafeshutdownsystemswillbeavailable foreachunit.Requiredmanua'1'-

actionsare(1)openingoftheAFWCross-Connect Valvesand(2)isolation ofthesteamsupplypathstoUnit1Turbine-DrivenAFWPump.Therewouldbenorequirement forone.orthreehourbarriers,

'additional detection orsuppression systems,orexemption requestsinordertomeetthecriteriaofAppendixRto10CFR50.Assuch,thefollowing firezonesarenowconsidered tobepartofasinglefirearea:2,77,78,79,80,81,82,83,84,85,86,87,88,89,90,'1,92,93,94,95,96,97,98,99,100,108,109,110,111,112,113,114,115,124,125,126,127,128,129,130and131.Conclusion Basedonthepreviousevaluation, thetenfireareasintheUnit1andUnit2TurbineBuildings, theentiretyoftheServiceBuilding, themainturbinedeck,andtheUnit1andUnit2mainsteampipetunnelscanbecombinedintoasinglefirearea.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesforthisconclusion aresummarized asfollows:Page9-84 (1)Thegreentraincablesareprotected toensureonetrainofredundant systemsisavailable intheeventofafireengulfing Unit1orUnit2TurbineBuilding.

(2)Duetothelocationofdetection andsuppression systemsintheintervening zonesbetweenthefirezonescontaining safeshutdowncablesand/orequipment, itishighlyunlikelythatfirecouldspreadtoallfirezones.(3)Shouldfirespreadtoallfirezones,alternate shutdowncapability isavailable byusingoppositeunitauxiliary feedwater pumpsandmanualoperations.

9ei2TurbineBuildinandScreenHouseBoundarEvaluation

~PuruseThepurposeof'hisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofcombining theTurbineBuilding, MainSteamPipeTunnels,andService/Office BuildingfireareawiththeScreenHouseFireArea(exclusive oftheEssential ServiceWaterPumpFireArea,FireZones29Athrough29G).Inaddition, portionsoftheTurbineBuildingthatwerenotpreviously identified inthe1983AppendixRsubmittal willbecombinedwiththeTurbineBuildingFireArea.ThesenewfirezonesincludeFireZones139,140,141,and143.TheScreenHousefire,zonesunderconsideration includeFireAreas28and30,andFireZones142and143.FireZones142and143areportionsoftheScreenHousethatwerenotpreviously identified inthe1983AppendixRsubmittal.

Thecombination oftheTurbineBuildingandScreenHousefireareaswillreducethenumberofareaboundaries thatrequiresurveillance andwillnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-85 DescritionFireAreas28and30aretheUnit1=andUnit2DieselFire,PumpRoomslocatedonthe591ftelevation oftheScreenHouse.FireZone142isthetraveling screenandcirculating waterpumpareasoftheScreenHouse,locatedonthe591ftelevation.

FireZone143istheintakeanddischarge areabelowthebasementoftheScreenHouseandTurbineBuilding.

FireZone139istheTurbineRoomsumplocatedonthe570ft-9in.elevation oftheTurbineBuilding.

FireZone140isthecausticstoragetankroomlocatedonthe571ft-9in.elevation oftheTurbineBuilding.-

FireZone141isthescreenwashpumproomlocatedonthe571ft--",.9in.elevation

.oftheTurbineBuilding.

FireZones2,77<<.through.100,108through115,.and124through131makeupthe"balance-of theTurbineBuildingFireArea.SeeSection9.11of'.;thisreportforamoredetaileddescription ofthesefirezones.,'.SafeShutdownEuimentFireZones139,140,141,142,143andFireAreas28and30donotcontainsafeshutdowncablesorcomponents.

Section9.11ofthisreportident,ified safeshutdowncapabilities intheTurbineandService/Office Buildings andMainSteamTunnelsfirearea.FireProtection EuimentAutomatic wetpipesprinkler systemsareprovidedinFireAreas28and30.Theremaining firezoneslocatedintheScreenhouse arenotprovidedwithautomatic detection orPage9-86 suppression capability.

SeeSection9.11ofthisreportforamoredetaileddiscussion ofthefireprotection featuresoftheTurbineandService/Office Buildings andMainSteamTunnels.FireHazardsAnalsisFireZones139and143havefireseverities lessthan10minutes(actualfireseverityexistingatthistimeiszero).FireZones140and141containlowamountsofcombustible materials withequivalent fireseverityunder25minutes(actualfireseverityexistingatthistimeis2.6and1.5minutes,respectively).

The<combustibles inFireZone142andFireAreas28and30arelocatedintheScreenHouse,whichisseparated fromtheTurbineBuildingbyan8-in.concretewallandtwoaccessdoors.Theautomatic wetpipesprinkler systemprovidedineachDieselFirePumpRoom(FireAreas28and30)woul,dcontroland/orextinquish anyfirestartingfromtheserooms.Thesafeshutdown'cablesthatexistintheTurbineBuildingFireAreaarealllocatedinthevicinityofColumnLineH,whichisapproximately 150ftfromthewalltotheScreenHouse(ColumnLineA).Conclusion Reasonable assurance existsthatthecombustibles intheScreenHouseandnewlyidentified TurbineBuildingfirezoneswouldnotendangerthesafeshutdowncapability intheTurbineBuilding.

Inaddition, thisevaluation doesnotadversely impactPage9-87 onotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized

=asfollows:(1)IfafireshouldstartineitherDieselFirePumpRoom(FireArea28or30)wherethehighestconcentrations ofcombustibles exist,the.automatic wetpipesprinkler systemwouldcontroland/orextinguish thefire.(2)An8-in.concretewallwithtwoaccessdoorsseparates theScreenHousefromtheTurbineBuilding=fire area.(3)ThesafeshutdowncablesintheTurbineBuilding.

areseparated fromtheScreenHousewallbyapproximately 150(4)FireZones139,140,141,and30donotcontaincomponents.

142,143.and.F.ire.Areas, 28.safeshutdowncablesor.(-5)"Onetrainof,safe,shutdown systems,components, andcablesexistsindependent ofthecombinedTurbineBuildingand.ScreenHousefireareas.9.13FireArea53andFireArea57HatchEvaluation lt'PuroseThepurposeofthisevaluation istoanalyzetheimpactofanunratedsteelplatehatchlocatedbetweentheUnit1ControlRoomandtheUnit1ControlRoomCableVault(FireArea,53andFireArea57,respectively) oneitherredundant safeshutdowncapability ortherequestforafixedsuppression exemption inFireArea53inSection7.11ofthisreport.Athree-hour fire-ratedhatchassemblyisnotcommercially available foruseinthislocation.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-88 FireArea53islocatedonthe633ftelevation oftheAuxiliary Building.

FireArea57islocateddirectlybelowonthe624ft-0in.elevation.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretewithathree-hour firerating;however,anunratedsteelplatehatchintheflooroftFireArea53providesaccesstoFireArea57.SafeShutdownEuimentFireAreas53and57containallcontrolandinstrumentation cablingrequiredfor~safeshutdownofD.C.CookUnit1.Shouldaenfireoccurineitherfirearea,completealternate shutdowncapability outsideof.both-areasis.providedusingUnit2equipment.

FireProtection EuimentAutomatic ionization detection systemsareinstalled inFireArea53andFireArea57.Automatic suppression isnotprovidedinFireArea53.FireArea57isprotected byanautomatic totalfloodingHalon1301suppression systemandbyamanuallyactuated.totalfloodingC02suppression system.Manualsuppression capabilities intheformofportableextinguishers andhose.stationsareavailable foruseinbothfireareas.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceiling assemblyseparating FireArea57onthe624ft-0in.elevation fromFireArea53onthe633ftelevation.

ForafiretoPage9-89 propagate betweenFireArea57andFireArea53,afireofsufficient durationandintensity wouldberequiredtochallenge theinherent.

fireprotection capabilities ofthesteelplatehatch.Thefailurepointofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60~ofitsyieldstrength.

Thislimitnormallyoccurswhenthetemperature ofthesteelreaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fireseverityof5-10minutesisrequiredtoachievethis:temperature.

Althoughthesteelplatehatchisnotaload-carrying structural component, thefailurecriteriaofstructural'steel canbe.,applied tothesteelplatehatchtoestablish aconservative "baseabovewhich'failurecouldbepostulated.

-FireArea.-57-'has-ixedcombustible loadingofunder1'20,000=Btu/ft foranequivalent fireseverityofapproximately 90minutes(theactualcombustible loadings"andequivalent fireseverityexistingatthistimeare103590Btu/ftand77.8.minutesrespectively).

Anequivalent fireseverityof90minuteswouldraisethetemperature ofthesteelplatehatchtowellover1000Fifthefire:,was

.,not~promptlydetectedandextinguished.

Anautomatic totalflooding'Halon1301suppression systemactuatedbythedetection

-systemisprovidedinFireArea57.ShouldtheHalon1301systemfailtoextinguish thefire,thetotalfloodingC02systemwouldbemanuallyactuated.

ThePage9-90 combination ofautomatic detection, automatic Halon1301suppression, andmanuallyactuatedC02asabackupprovidesreasonable assurance thatafireinvolving fixedcombustibles inFireArea57wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotect'he openinginthebarrier.Theexistence oftheautomatic detection systemandtheautomati'c Halon1301andmanualC02suppression systemswilltendtomitigatetheimpactofincreases inthefixedcombustible loadingorthe.presenceoftransient combustibles, providedthattheincreases donotexceedthe.capabilities ofthesuppression system.FireArea53isthecontinuously.'anned ControlRoom.I.thasa,fixedcombustible loadingof,.under47,,000Btu/ftforanequivalent fireseverityofunder35minutes.(Theactualcombustible "loadingand'equivalent fireseverityexisting, atthistimeare28,225Btu/ftand21.2minutes,respectively.)

Theamount.oftransient combustibles allowedintheControlRoomandwillbecontrolled.

Anequivalent fireseverityof35minutescouldraisethetemperature ofthe,hatchabove1000F.Twoconsiderations mustbetakenintoaccount.First,thesteelplatehatchislocated.inthefloorofFireArea53.Thehighertemperatures associated withafireinthisareawouldtendtobenearceilinglevel.Floor-based

'emperatures shouldbeconsiderably lowerthanthoseattheceiling.Page9-91

'econdly, thefireareaiscontinuously mannedbytrainedoperators.

Manualfirefightingactivities canbeexpectedto-takeplacealmostimmediately afterdetection ofthefire.Thereisreasonable assurance, therefore, thatafireinvolving fixedand/ortransient combustibles inFireArea53wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireinFireArea53orFireArea57would'ot',impairthesafeshutdowncapabilities ofD.C.CookUnitl.In.>addition,,

this.evaluation doesnotimpactonthebasesofthe-"fixedsuppression exemption requestforFireArea53oronotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion aresummarized asfollows:(2)(3)Anequivalent fireseverityof5-10minutesisrequiredtoraisethetemperature ofload-carrying structural steeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeused'oestablish aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

FireArea57hasanequivalent fireseverityof90minutes;however,automatic detection, automatic Halon1301suppression

.andmanuallyactuatedC02suppression willresultindetection andsuppression ofafireinthisareainitsincipient stages.Increases inthefixedand/ortran'sient combustible loadingsinPage9-92 FireArea57shouldalsobemitigated bythepresenceofthedetection andsuppression systems,providedthattheincreases donotexceedsystemcapabilities.

(4)Theequivalent fireseverityofFireArea53isunder35minutes.(5)Thehatchislocatedinthefloor,andfloor-based temperatures canbeexpectedtobesignificantly lowerthanthoseatceilinglevel.(6)Anautomatic detection systemisprovidedinFireArea53.(7)FireArea53iscontinuously manned.Manualfirefightingactivities canbeexpectedalmostimmediately afterdetection ofthefire.(8)Shoulda-Hreoccurin"eitherFireArea53orFireArea57,completealternate shutdowncapability outsideofbothfireareasisprovidedusingUnit2equipment.

,(9),Replacing thesteelplatehatchwithoneoffire-rated' construction wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

9.14FireZone43andFireArea56HatchEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactofanunratedsteelpl'atefloorhatchlocatedbetweentheAccessControlAreaandtheUnit1Auxiliary CableVault(FireZone43andFireArea56,respectively) onredundant safeshutdowncapability.

Athree-hour fire-rated hatchassemblyisnot,commercially available foruseinthislocation.

Inaddition, thisevaluation doesnotadversely, impactonotherevaluations orexemption requestscontained inthisreport.Page9-93 DescritionFireZone43islocatedonthe609ft-6in.elevation oftheAuxiliary Building.,

ItispartofalargerfireareathatincludesFireZones37,44N,44S,and44Athrough44H.FireArea56islocateddirectlyaboveFireZone43onthe620ft-6in.elevation oftheAuxiliary Building.

Thebarrierseparating thetwozonesisconstructed ofreinforced concretewithathree-hour firerating;however,anunratedsteelplatehatchintheceilingofFireZone43providesaccesstoFireArea56.SafeShutdownEuimentFireZone43andFire'rea56containcablesrequiredforsafeshutdown.

of.D.C.CookUnit1..Shouldafireoccurineitherofthese,'locations, completealternate shutdowncapability isprovidedoutsideof.the-fireareaand=firezoneusingUnit2equipment.-

FireProtection EuimentAutomatic ionization detection systemsareinstalled inFireZone43belowthesuspended ceilingandinFireArea56.FireZone43isnotprotected byautomatic suppression.

FireArea56isprotected byan.automatic C02totalfloodingextinguishing systemthatis.activated bythedetection system.Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinbothlocations.

Page9-94

'FireHazardsAnalsisThesteelplatehatchis.locatedinthefloor/ceiling assemblyseparating FireZone43on"the609ft-6,in.elevation fromFireArea56onthe620ft-6in.elevation.

Forafiretopropagate betweenFireZone43andFireArea56,afireofsufficient durationandintensity wouldberequiredtochallenge theinherentcapabilities ofthesteelplatehatch.Thefailurepointofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60%ofitsyieldstrength.

Thislimitnormallyoccurswhenthetemperature of.thesteelreaches1000F.UndertheASTM.E119StandardTime-Temperature curve,,anequivalent fire='.:severity.

of5-l0'minutes-:i' requiredto,achieve this'temperature."

'Thesteelplatehatchisnotaload-carrying structural

.component; however,the=failurecriteriaofstructural steelcanbe'appliedto:thesteel-plate hatchtoestablish aconservative baseabovewhichfailure-,could bepostulated.

FireZone43isanormallymannedlocation; however,duringsomebackshiftperiodswithreducedmanning,theRPdutiesmayIrequire.thezonetobeunoccupied.

Afixedcombustible loadingcofunder80,000Btu/ftforanequivalent fireseverityof'60'.2minutesexistsinFireZone43.(Theactualcombustible loading.andequivalent fireseverityexistingatthistimeareunder74,361Btu/ftandunder56minutes,respectively.)

The2equivalent fireseverity(60minutes)inFireZone43willraisePage9-95 thetemperature ofstructural steeluptoitsfailurepoint(5-10minutes).

However,afireinthiszoneshouldbedetectedinitsincipient stagesbyeithertheautomatic detection systemorthepersonnel normallymanningthe,area.Thiscombination ofautomatic detection and"normalmanningprovidesreasonable assurance thatafireinvolving "fixedand/ortransient combustibles inFireZone43wouldnotadversely impactonthecapability ofthesteelplatehatchtoadequately protecttheopeninginthebarrier.FireArea56hasafixedcombustible loading-ofunder"80; 000'tu/ft foranequivalent fire'everityofapproximately 60minutes,-

(theactualcombustible

.loading..

andequivalent fireseverityexistingatthistimeare68,120Btu/ftand51minutesrespectively)..

Anequivalent

.fireseverityof60minuteswouldraisethetemperature ofthesteel-platehatchto'over1000Fifthefirewasnotpromptly'etectedandextinguished.

Atotalfloodingautomatic C02systemisprovidedinFireArea56.Itisactuatedbytheionization detection system.Thecombination ofautomatic detection andCO2suppression ensuresdetection andsuppression ofafireinFireArea56initsincipient stages.Thisprovidesreasonable assurance thatafireinvolving fixedcombustibles inFireArea56wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemswill.tendtomitigateincreases inthefixedPage9-96 combustible loadingorthepresenceoftransient.

combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireinFireZone43orFireArea56wouldnotimpairthesafeshutdowncapabilities ofD.C.CookUnit1.I.naddition, thisevaluation does-notadversely impactonotherevaluations orexemption requestscontained inthisreport..Thebasesthat-justifytheconclusion aresummarized asfollows:(1),Anequivalent firesever.ity.of 5-10,minutesisrequiredtoraisethe.temperature ofload-carrying structural steeluptoitsfailurepointof;1000oF.(2)Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeusedtoestablish aconservative base,abovewhichfailurecouldbepostulated withoutadditional fireprotection.

(3).FireZone43hasanequivalent fireseverityof60minutes.(4)Anautomatic detection systemisprovidedinFireZone43andisnormallymanned,therebyensuringearl.ydetection offire.(.5)Theequivalent fireseverityofFireArea56isunder60minutes;however,anautomatically

actuated,

'totalfloodingC02systemisprovided.

(6)Theprovision oftheC02systemactuatedbytheionization detection system'nsuresdetection andsuppression ofafireinFireArea56initsincipient stages.Increases inthefixedand/ortransient combustible loadingsinFireArea56shouldalsobePage9-97 mitigated bythepresenceofthedetection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression system.(7)ShouldafireoccurineitherFireZone43orFireArea56,completealternate shutdowncapability usingUnit2equipment isprovided.

Therefore, shouldfirespreadbetweenthetwolocations, thesamealternate shutdownmethodwouldbeutilized.

(8)Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsignificantly enhance'heprotection providedbytheexistingconfiguration.

9.15FireZone40BandFireArea55HatchEvaluation

~PuruseThepurposeofthisevaluation istoanalyzetheimpactofanunratedsteelplatefloorhatchlocatedbetweentheUnit14kVSwitchgear RoomandtheUnit1Switchgear RoomCableVault(FireAZone40BandFireArea55,respectively) onredundant safeshut-downcapability.

'A.three-hour fire-rated hatchassemblyisnotcommercially available foruseinthislocation.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZone40Bislocatedonthe609ft-6in.elevation of~IC8theAuxiliary Building.

ItispartofalargerfireareathatincludesFireZone40A.FireArea55islocateddirectlyaboveFireZone40Bonthe625ft-10in.elevation.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretePage9-98 withathree-hour firerating;however,anunratedsteelplateha'tchintheceilingofFireZone40BprovidesaccesstoFireArea55.SafeShutdownEuimentFireZone40BandFireArea55containcablesandequipment requiredforsafeshutdownofD.C.CookUnit1.Shouldafire'ccur ineitherFireZone408orFireArea55,completealternate shutdown-capability outsideofthefireareaorzoneisprovidedusingUnit2equipment.

FireProtection EuimentAutomatic ionization andinfrareddetection systemsareinstalled inFireZone40B.andFireArea55.Anautomatic.

total'looding C02suppression systemisprovided.inFireZone,40B.-.Anautomatic totalfloodingCO'2suppression systemisalsoprovidedinFireArea55,exceptthat.coverage doesnotextendintotheCDBatteryRoom.(ThehatchisnotlocatedintheCDBatteryRoom.)Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinbothFireZone40BandFireArea55.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceiling assemblyseparating FireZone40Bonthe609ft-6in.elevation fromFireArea55onthe625ft-10in.elevation.

Forafiretopropagate betweenFireZone40BandFireArea55,afireofsufficient durationandintensity wouldberequiredtochallenge Page9-99 theinherentfireprotection capabilities ofthesteelplatehatch.-Thefailure-point ofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60~ofitsyieldstrength.

Thislimitnormallyoccurswhenthetemperature ofthe,steel-.reaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fires'everity of5-10minutesisrequiredtoachievethistemperature.

Althoughthesteelplate'hatchisnotaload-carrying structural component, thefailurecriteriaofstructural steel"canbeapplied'to the-steel"plate'-:'atch toestablish aconservative baseabovewhichfailurecouldbe.postulated...,

FireZone.40Bhas,afixedcombustible loadingofunder33,000Btu/ftforan.equivalent fireseverityofapproximately 25minutes.(the actual'ombustible

.loading,andequivalent fires'everity existingatthistimeare18,144Btu/ft2and13.6minutesrespectively).

Anequivalent fire-severity ofunder25minuteswouldraisethetemperature ofthehatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.

Ana'utomatic totalfloodingCO2suppression systemactuatedbyionization and,infrared detectors

'sprovidedinFireZone40B.Thecombination ofautomatic detection andautomatic totalfloodingC02suppression providesreasonable assurance thatafireinvolving fixedcombustibles inFireZone40Bwouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence ofthePage9-100 automatic detection andsuppression systemswilltendtomitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.Fire,Area55hasafixedcombustible loadingofapproximately 47,000Btu/ftforanequivalent fireseverityofapproximately 35minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeare33,536Btu/ftand25.1minutesrespectively).

Anequivalent fireseverityofunder35minuteswou4d.raise'he,,temperature ofthesteelplatehatchtoover,1000 Fifthefirewas'otpromptlydetectedandextinguished.

Anautomatic..total floodingC02.suppression-system (whichdoesnotprotectthe.CDBatteryRoom)".actuatedby-ionization.and infrareddetectors

~is'rovidedi~nFireArea55)The.,combination of,automatic detection andautomatic totalfloodingC02,suppression provides.reasonable

.assurance that"afireinvolving fixedcombustibles inFireArea55wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemswilltendtomitigate'ncreases inthefixedcombustible loadingorthepresenceof..transient combustibles, providedthattheincreases donotexceed'-thecapabilities ofthesuppression system..Page9-101 Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireinFireZone40BorFireArea55wouldnotimpairsafeshutdowncapabilities ofD.C.CookUnitl.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion aresummarized asfollows:(2)(3).(4)(5)Anequivalent fireseverityof5-10minutesisrequiredtoraisethetemperature ofload-carrying structural steeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeusedtoestablish

,aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

.FireZone40Bhasan.equivalent fireseverityofunder25minutes;however,automatic detection andautomatic C02suppression wouldresultindetection andsuppression ofafireinFireZone40Binitsincipient stages.Increases inthefixedand/ortransient combustible loadinginFireZone40Bwouldbemitigated bythepresenceoftheautomatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression system.FireArea55hasanequivalent fireseverityofunder35minutes;however,automatic detection andautomatic C02suppression (exceptfortheCDBatteryRoom)wouldresultindetection andsuppression ofafireinFireArea55initsincipient stages.Increases inthefixedand/ortransient combustible loadingsinFireArea55(excluding theCDBatteryRoom)wouldbemitigated bythepresenceoftheautomatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression system.ShouldafireoccurineitherFireZone40BorFireArea55,completealternate capability isprovidedPage9-102 outsideofthefireareaorzoneusingUnit2equipment.

(6)Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

9.16FireArea41andFireArea55HatchEvaluation

~PuroeeThepurposeofthisevaluation istoanalyzetheimpactofanunratedsteelplatehatchlocatedbetweentheUnit1Engineering SafetySystemandMCCRoomandtheUnit1Switchgear RoomCableVault(FireArea41andFireArea55,respectively) onredundant safe,shutdowncapability.

Athree-hour fire-rated ehatchassemblyisnotcommercially available for=,'use,in thislocation.

Inaddition,,

thisevaluation does.notadversely:impact onotherevaluations or.exempt-ion requests;contained, inthisreport.DescritionFireArea41islocatedonthe609ft-6in.elevation oftheAuxiliary Building.

FireArea55islocateddirectlyaboveFireArea41onthe625ft-10in.elevation.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretewithathree-hourfirerating;however,asteelplatehatchintheceilingofFireArea41providesaccessintotheBatteryRoomenclosure of'ireArea55.Page9-103 SafeShutdownEuimentFireArea41andFire.Area55containcablesandequipment requ'ired forsafeshutdownofD.C.CookUnit1.ShouldafireoccurineitherFireArea41orFireArea55,completealternate shutdowncapability outside:of bothfireareasisprovidedusingUnit,2equipment.

FireProtection EuimentAutomatic ionization andinfrareddetection systemsareinstalled inFireArea41andFireArea55.TheCDBatteryRoomenclosure ofFireArea55isprovidedonlywithionization detection.

Anautomatic

'tota~lfloodingC02suppression systemisprovided, inFireArea41andFire.Area55.*,Automatic suppression capability, isnotprovidedintheCD'BatteryRoomenclosure.

Manualsuppression

.*capabilities intheformofportable,extinguishers-and.;hose

.stations, areavailable foruseinbothFireArea41and'ireArea55,including theCDBatteryRoomenclosure.

FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceiling assemblyseparating Fire,Area41onthe609ft-6in.elevation and,theCDBatteryRoomenclosure ofFireArea55onthe625ft-10in.elevation.

Forafiretopropagate betweenFireArea41andFireArea55,afireofsufficient durationandintensity wouldberequiredtochallenge theinherentfireprotection capabilities ofthesteelplatehatch.Page9-104 Thefailurepointofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60%ofitsyieldstrength.

Thislimitnormallyoccurswhenthetemperature ofthesteelreaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fire.severityof5-10minutesisrequiredtoachievethistemperature.

Althoughthesteelplatehatchisnotaload-carrying structural component, thefailurecriteriaofstructural steelcanbeappliedtothesteelplatehatchtoestablish aconservative baseabovewhichfailurecouldbepostulated.

FireArea-41hasafixedcombustible loading,.of under40,0002Btu/ftforanequivalent

.,fireseverity.ofapproximately 30:4Iminutes(the,,actualcombustible loading.and;equivalent fire.severityexistingat,.this,,time are.,27,,614, Btu/ft.and20.7;.minutesrespectively).

Anequivalent.,fire"severity.of under30'inutes wouldraisethetemperature..of thehatchtoover1000F;ifthefirewasnotpromptlydetectedandextinguished.

Anautomatic totalfloodingCO2suppression systemactuatedbyionization andinfrareddetectors isprovidedinFireArea41.-Thecombination ofautomatic detection andautomatic total,floodingC02suppression provides,reasonable assurance

'thata>fireinvolving fixedcombustibles inFireArea41wouldnot-adversely impactonthecapability ofthesteelplate'atch to~protecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemswilltendtomitigateincreases inthefixedcombustible loadingorthepresenceofPage9-105 rtransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.FireArea"'5'asafixedcombustible loadingofapproximately 47,000Btu/ftforanequivalent fireseverityofa'pproximately 35minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeare33,536Btu/ftand25.1minutes,respectively).

Anequivalent fireseverityofunder3Sminuteswouldraisethetemperature ofthesteelplatehatchover1000oFifthefirewasnotpromptlydetectedandextinguished.

Thefixedcombustible materials intheCDBatteryRoome'nclosure arethe'atterycasings.Transient combustibles arenotpostulated "inthislocationbasedoncontrolled access'tothe4kVRoomcomplex.Maintenance activities wouldrequire.minimalalnountsofcombustible materials..

Firewouldhavetospreadintot'eCDBatteryRoomenclosure fromtheremainder ofFireAreaS5inordertoignitethecasings.Anautomatic totalfloodingC02suppression system(whichdoesnotprotecttheCDBatteryRoom)actuatedbyionization andinfrareddetectors isprovidedinFireArea55.Thecombination ofautomatic detection andautomatic totalflooding-CO2suppression providesreasonable assurance thatafireinvolving fixedcombustibles inFireArea55wouldnotspreadintotheCDBatteryRoomenclosure, ignitethebatterycasings,andadversely impactonthecapability ofthesteelPage9-106 platehatchtoprotecttheopeninginthebarrier.,

Increases inthefixedcombustible loadingorthepresenceoftransient combustibles outsideoftheCD,BatteryRoomenclosure inFireArea55wouldbemitigated by,thepresenceoftheautomatic detection.and suppression systems,providedthattheincreases donot.exceedthecapabilities of,thesuppression system.Conclusion Basedontheaboveevaluation, reasonab'le assurance isprovidedthatafireinFireArea41orFireArea55wouldnotimpairsafeshutdown-,capabilities ofD.C.CookUnitl.Inaddition, thisevaluation does,notadversely impactonotherevaluations orexemption requestscontained in.thisreport.Thebasesthat.justifythe-conclusion're summarized-asfollows:.(1)Anequivalent

'fireseverity'of5-10minutes's requiredtoraisethetemperature of.load-carrying structura'1 steeluptoitsfailurepointof.1000F.=(2)Thesteelplatehatchisnotaload-carrying structural

"'"'component;"-

however,a5-10minutefireseveritycanbeusedtoestablish aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

(3)FireArea41hasanequivalent fireseverityofunder.30minutes;however,automatic detection andautomatic C02suppression shouldresultindetection andsuppression ofafireinFireArea41initsincipient stages.Increases inthefixedand/ortransient combustible loadingsinFireArea41wouldbemitigated bythepresenceofthe-automatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression systems.Page9-107 (4)FireArea55hasanequivalent fireseverityofunder35minutes;however,automatic detection andautomatic C02suppression (exceptfortheCDBatteryRoom)shouldresultindetection andsuppression ofafireinFireArea55initsincipient stages.Increases inthefixedand/ortransient combustible loadingsinFireArea55(excluding theCDBatteryRoom)wouldbemitigated bythepresenceoftheautomatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression systems.(5)Theonlycombustible materials intheBatteryRoomEnclosure arethebatterycasings.Firewouldhavetospreadintotheenclosure fromtheremainder ofFireArea55.(6)ShouldafireoccurineitherFireArea41orFireArea55,completealternate capability isprovidedoutsideofthefireareasusingUnit2equipment.

(7)Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

r9.17FireArea54andFireArea58HatchEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactofIanunratedsteelplatehatchlocatedbetweentheUnit2ControlRoomandtheUnit2ControlRoomCableVault(FireArea54andFireArea58,respectively) oneitherredundant safeshutdowncapability ortherequestforfixedsuppression exemption inFireArea54inSection7.12ofthisreport.Athree-hour fire-rated hatchassemblyisnotcommercially available foruseinthislocation.

Inaddition, this,evaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-108 DescritionFireArea54islocatedonthe633ftelevation oftheAuxiliary Building.

FireArea58islocateddirectlybelowonthe624ft-0in.elevation.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretewithathree-hour firerating;.however, anunratedsteelplatehatchin,thefloorofFireArea54providesaccesstoFireArea58.SafeShutdownEuimentFireAreas54and58containallcontrolandinstrumentation cablingrequiz'ed forsafeshutdownofD.C.CookUnit2.Shouldafireoccurineitherfirearea,,complete, alternate shutdowncapability isprovidedoutsideofbothfireareasusingUnit'1equipment.

FireProtection EuimentAutomatic ionization detection systemsare,installed

'inFireArea54andFireArea58.Automatic suppression isnot,providedinFireArea54.FireArea58isprotected byanautomatic totalfloodingHalon1301suppression systemandbyamanuallyactuatedtotallyfloodingC02suppression system.Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinbothfireareas.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceiling assemblyseparating FireArea58onthe624ft-0in.elevation fromFireArea54onthe633ftelevation.

ForafiretoPage9-109' propagate betweenFireArea58andFireArea54,afireofs'ufficient durationandintensity wouldberequiredtochallenge theinherentfireprotection capabilities ofthesteelplatehatch.Thefailurepointofexposedstructural steelistakentobew'heni'tsload-carrying'apability isreducedto60%ofitsyieldstrength.

Thislimit'ormally occurswhenthetemperature ofthesteelreaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fireseverityof5-10minutesisrequiredtoachievethis'emperature.

Althoughthesteelplateh'atchis,notaload-carrying structural component, thefailurercriteriaofstructural steel.canbe:appliedtothesteelplatehatchtoestablish

.a"conservative'ase abovewhichfailurecouldbepostulated..

FireArea'58'hasafixedcombustible loadingofunder113,000Btu/ftforan'quivalent-.fire severityofapproximately 85minutes(theactualcombustible loading.andequivalent fireseverityexistingatthistimeare99,344Btu/ftand74.7minutesrespectively).

Anequivalent fireseverityofunder85minuteswouldraisethe-temperature

.ofthesteelplatehatchtowellover1000oFifthefirewasnotpromptlydetectedandextinguished.

Anautomatic totalfloodingHalon1301systemactuatedbyionization detectors isprovidedinFireArea58.ShouldtheHalon1301systemfailtoextinguish thefire,thetotalfloodingC02systemwouldbemanuallyactuated.

ThePage9-110 combination ofautomatic detection, automatic totalfloodingHalon1301suppression, andmanuallyactuatedC02asabackupprovidesreasonable assurance thatafireinvolving fixedcombustibles inFireArea58wouldnotadversely impacton-thecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic.

detection andsuppression systemswilltendtomitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.FireArea54isacontinuously-manned ControlRoom.Ithasafixedcombustible loadingof47,000Btu/ft.foranequivalent<

fireseverityofunder35.minutes.(The-actual combustible loadingandequivalent fireseverityexistingatthistimeareunder30,069Btu/ftand22.6minutes,respectively.)

Theamount2oftransient combustibles allowedintheControlRoomwillbe'ontrolled.

Anequivalent fireseverityofunder35minutescouldraisethetemperature ofthehatchabove1000F.Twoconsiderations mustbetakenintoaccount.First,thesteelplatehatchislocatedinthefloorofFireArea54.Thehigher;temperatures associated withafireinthisareawouldtendtobe-nearceilinglevel.Floor-based temperatures shouldbe'onsiderably lowerthanthoseattheceiling.Secondly, the-fireareaiscontinuously mannedbytrainedoperators.

Manualfirefightingactivities canbeexpectedtotakeplacealmostimmed'iately afterdetection ofthefire.Thereisreasonable Page9-111 assurance, therefore, thatafireinvolving fixedand/ortransient combustibles inFireArea54wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Conclusio'n Basedon'he'boveevaluation, reasonable assurance isprovidedthatafireinFireArea54orFireArea58would'notimpairthesafeshutdowncapabilities ofD.C.CookUnit2orimpactonthefixedsuppression exemption requestforFireArea54.Inaddition, thisevaluation doesnot'adversely'impa'ct on"'therevaluations orexemption requestscontained inthisreport.The,bases.that-justify.the.conclusion aresummarized's follows:(2)(3)(4)'nequivalent fireseverityof5-10minutesis'required toraisethetemperature ofload-carrying structural steelup.to,itsfailurepointof1000F.Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeusedtoestablish aconservative,.

baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

FireArea58hasanequivalent fireseverityofunder85minutes;however,automatic detection, automatic Halon1301suppression andmanuallyactuatedC02suppression shouldresultindetection andsuppression ofafireinthisareainitsincipient stages.Increases inthe,fixedand/ortransient combustible loadingsinFireArea58wouldtendtobemitigated bythepresenceoftheautomatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression system.I"Theequivalent fireseverityofFireArea54isunder35minutes.Page9-112 (5)Thehatchislocatedinthefloor,andfloor-based temperatures canbeexpectedtobesignificantly lowerthanthoseatceilinglevel.s(6)Anautomatic detection systemisprovidedinFireArea54.(7)FireArea54iscontinuously manned.Manualfirefightingactivities canbeexpectedalmostimmediately afterdetection ofthefire.4(8)Shouldafire,occurineitherFireArea54orFireArea58,completealtexnate shutdowncapability outsideofbothfireareasisprovidedusingUnit1equipment.

(9)Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsignificantly enhancetheprotection.provided bythe,existingconfiguration.

9.18FireZone52andFireArea59HatchEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactofanunratedsteelplatefloorhatchlocatedbetweenthe633ftelevation ofthe-Auxiliary BuildingandtheAuxiliary CableVault(FireZone52andFireArea59,respectively) onredundant safeshutdown"capability.,

Athree-hour fire-rated hatchassemblyisnotcommercially available foruseinthislocation.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.DescritionFireZone52islocatedonthe633ftelevation oftheAuxiliary Building.

ItispartofalargerfireareathatincludesFireZones49,50,51,3,32,69,36,and48.FireAreaPage9-113 59islocateddirectlybelowthesouthwest cornerofFireZone52onthe622ft-6in;elevation oftheAuxiliary Building.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretewithathree-hour firerating;however,anunratedsteelplatehatchinthefloorofFireZone52providesaccesstoFireA'rea59..SafeShutdownEuimentFireZone52containscablesrequiredforsafeshutdownofD.C.CookUnits1and2.TheMarch1983AppendixRSubmittal identified methodsofachieving compliance with."Appendix-Rinthisarea(extending suppression coveragethroughout thezoneandalternate shutdownvialocal'ORVcontrol),

which'ere reviewedandapprovedbythe,NRC.Fire-Area59containscablesforsafeshutdownof,D.C.CookUnit2.Shoulda'ireoccurinFireArea.'9,completealternate shutdowncapability isprovidedoutsideofthefireareausingUnit1equipment.

FireProtection EuimentAutomatic ionization detection systemsareinstalled inFireZone52andFireArea59.Apreaction sprinkler system,whichrequiresactuation ofthepilotlinedetectorsystemtoallowwatertoenterthe;sprinkler pipingsystem,withheatthenrequiredtofuseindividual sprinkler heads,isprovidedinFireZone52.Anautomatic totalfloodingCO2suppression systemthatis-actuated bythedetection systemisprovidedinFireArea'59.Page9-114 Manualsuppression capabilities intheform.ofportableextinguishers andhosestationsareavailable foruseinbothlocations.

FireHazar'dsAnalsisThesteelplatehatchis.located,inthefloor/ceiling assemblyseparating FireZone52onthe633ftelevation fromFireArea59onthe622ft-6in.elevation.

Forafiretopropagate betweenFireZone52andFireArea59,afireofsufficient durationandintensity wouldberequiredtochallenge theinherent.fire~protection, capabilities ofthesteelplatehatch.Thefailurepointofexposedstructural

.-steel'is takento-bewhenitsload-carrying capability i's.reducedto60<of,i"tsyieldstrength.

,Thislimit.normallyoccurswhenthetemperature=of thesteelreaches1000F.UndertheASTME119StandardTime-,'.Temperature curve,anequivalent fire.severity of5-10minutesisrequiredtoachievethistemperature.

Althoughthesteelplatehatchisnotaload-carrying structural component, thefailurecriteriaofstructural steelcanbeappliedtothesteelplatehatch,toestablish aconservative baseabovewhichfailurecould:bepostulated.

Thefixedcombustible loading;inFireZone52isunder,27,000Btu/ftforanequivalent

.fireseverityofapproximately-20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare10,717Btu/ftand7.9minutesPage9-115 respectively.)

FireZone52islocatedinafireareawithanaveragefixedcombustible loadingofunder'33,000 Btu/ftforanequivalent fireseverityofapproximately 25minutes.(Theactualcombustible loadingandequivalent fireseverity=

existingatthistimeare17,283Btu/ftand12.9minutes,respectively.)

Onthelevelonwhichthis'zoneislocated(madeupofFireZones49,50,51and52),theaveragefixedcombustible loadingisunder47,000Btu/ftforanequivalent fireseverityofapproximately 35minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistime're28,'629"Btu'/ft and21.4minutes,respectively.)

'owever,theequivalent fireseverity, ofthose,zones,(FireZones49,50,51'and52)onthe633ftelevation-(35minutes)"wouldraisethetemperature toover1000Fifthefire'asnot.promptlydetected'and extinguished.

An,automatic drypilotpreacti'on.

sprinkler systemisprovided-in F~ireZone52.Thiscombination ofautomatic ionization detection anddrypilotpreaction, sprinklers provides'reasonable assurance thatafireinvolving fixedcombustibles inthefireareacontaining FireZone52wouldnotadversely impactonthecapability ofthesteel,plate-hatch toprotecttheopeninginthebarrier..

The.existence, oftheautomatic detection andsuppression systemswilltend'tomitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.Page9-116 FireArea59hasafixedcombustible loadingofunder67,000Btu/ftforanequivalent fireseverityofapproximately 50minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare.54,237Btu/ftand40.7minutes,respectively.)

Anequivalent fireseverityof50minutes.would,raise.thetemperature ofthesteelplate,hatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.

Anautomatic totalfloodingCO2suppression systemactuatedbythede'tection systemisprovidedinFireAreaS9.ItThecombination oj,.automatic detection andautomatic totalfloodingC02suppression, providesreasonable assurance that,afireinvolving fixedcombustibles,,

would,not"adversely-;impact onthecapability ofthesteelplate-hatch toprotect'he

.opening.inthebarrier.Theexistence.

of.theautomatic>>

detection andsuppression systemswilltendto"mitigate-increases in'hefixedcombustible loadingor,thepresence-oftransient combustibles;"

providedthattheincreases donotexceedthecapabilities of=thesuppression system.Conclusion Basedonthe'boveevaluation, reasonable assurance is~providedthatafireinFireZone52orFireAreaS9wouldnot.impairsafeshutdowncapabilities ofD.C.CookUnits1and2.In*addition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-117 Thebasesthatjustifytheconclusion aresummarized asfollows:(1)(2)(3)Anequivalent fireseverityof5-10minutesisrequiredtoraisethetemperature ofload-carrying structural steeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeusedtoestablish aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

FireZone52hasanequivalent fireseverityof20minutes.Thecombination offirezonesmakingupthefireareainwhichFireZone52islocatedhasanaveragefireseverityof25minutes.Theaveragecombustible loadingofthosefirezones"on'he"633

't'levation thatareincludedinthefireareawithFireZone52is35minutes.(5)(6).Theautomatic ionization detection anddrypilotpreaction sprinkler systemsinstalled inFireZone52wouldresultindetection andsuppression ofafireinvolving fixedcombustibles initsincipient stages.Increases inthe.fixedand/or,transient combustible loadingsinFireZone'52willbemitigated bythe.,presence, of.automatic.

suppression

'systems,

'provided thattheincreases donotexceedthecapabilities ofthesuppression.,systems.

FireArea59hasanequivalent fireseverityof50minutes;however,automatic detection andautomatic C02suppression shouldresultindetection andsuppression ofafireinvolving fixedcombustibles inFireArea59initsincipient stages.Increases inthefixedand/ortransient combustible loadingsinFireArea59willbemitigated bythepresenceofautomatic suppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression systems.Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

Page9-118 9.19FireArea45andFireArea60HatchEvaluation P~uruseThepurposeofthisevaluation istoanalyzethe<"impact ofanunratedsteelplatehatchlocatedbetweentheUnit2Engineering SafetySystemandMCCRoomandtheUnit2Switchgear RoomCableVault(FireArea45andFireArea60,respectively) onredundant safeshutdowncapability.

Athree-hour fire-rated hatchassemblyisnotcommercially available foruseinthislocation.

Inaddition, thisevaluation doesnotadversely impact,onotherevaluations, orexemption requestscontained inthisreport.-eFireArea45islocatedonthe609ft-6-in.'elevation oftheAuxiliary Building.

FireArea,60islocateddirectlyaboveFireArea45onthe625ft-10in..elevation.

Thebarrier.separating thetwoareasisconstructed ofreinforced concretewithathree-hourfirerating;however,asteelplatehatchintheceilingofFireArea45providesaccessintotheCDBatteryRoomenclosure ofFireArea60.SafeShutdownEuimentFireArea45andFireArea60containcablesandequipment requiredforsafeshutdownofD.C.CookUnit2.ShouldafireoccurineitherFireArea45orFireArea60,completealternate shutdowncapability outsideofbothfireareasisprovidedusingUnit1equipment.

0Page9-119 FireProtection EuimentAutomatic.

ionization andinfrareddetection systemsareinstalled inFireArea45andFireArea60.TheCDBatteryRoomenclosure ofFireArea60isprovidedonlywithionization detection.

Anautomatic totalfloodingC02suppression systemisprovidedinFireArea45andFireArea60.Automatic suppression capability isnotprovidedintheCDBatteryRoomenclosure.

Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinbothFireArea45andFireArea60,including

'theCD'--Battery"Room

'nclosure.

F~ireHazardsAnalsis-,.The.steel.platehatchis.locatedinthefloor/ceiling assemblyseparating FireArea45onthe609ft-6in.elevation andthe.CD..Battery Roomenclosure, ofFireArea60onthe625ft-10in.elevation.

Forafiretopropagate betweenFireArea45andFireArea60,afireofsufficient durationandintensity wouldberequiredtochallenge theinherentfireprotection capabilities ofthesteelplatehatch.Thefailurepointofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60<ofitsyieldstrength.

Thislimitnormallyoccurswhenthetemperature ofthesteelreaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fireseverityof5-10minutesisrequiredtoachievethistemperature.

AlthoughthesteelplatePage9-120 hatchisnotaload-carrying structural component, thefailurecriteriaofstructural steelcanbeappliedtothesteelplatehatchtoestablish aconservative base.abovewhichfai'lure'couldbepostulated.

FireArea45hasafixedcombustible loadingofunder40000Btu/ftforanequivalent fire"severity.-ofapproximately 30minutes.(Theacxtual..combustible loadingandequivalent.

fireseverityexistingatthistimeare23,443Btu/ftand17.6minutes,respectively.)

Anequivalent 4;ireseverityof30minuteswouldraisethetemperature ofthehatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.

,An.automatic total...flooding C02suppression system-actuated-byionization" "andinfrareddetectors isprovidedin'ireArea"-45.,'he'combination ofautomatic detection andautomat.ic totalfloodingCO2;suppression providesreasonable assurance thatafire.involving fixedcombustibles inFireArea45would..not adversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemswilltendtomitigateincreases inthefixedcombustible loading'or thepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.FireArea60hasafixedcombustible loadingofapproximately 40,000Btu/ftforanequivalent fireseverityofPage9-121 approximately 30minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare25,487Btu/ft2and-19minutes-,

respectively.)

Anequivalent fireseverityof30minuteswouldraisethetemperature ofthesteelplatehatchto-over1000Fifthefirewasnotpromptlydetectedandextinguished; Theonlycombustible materials in'heCDBatteryRoomenclosure arethebatterycasings.Transient combustibles arenotpostulated inFireArea60,including theCDBatteryRoom,basedoncontrolled accessthroughout the"entir'e4kV"'"Ro'om'-'"

complex.Maintenance activities wouldrequireminimalamountsofc'ombustible,:materials.,

Firewould'ave-.tospreadintothe1'nclosure from.theremainder ofFireArea60inordertoignitethecasings;,An"'automatic totalfloodingC02suppression system(which,does.riot'rotect' theCDBatteryRoom)actuatedbyionization andinfrareddetectors isprovidedinFireArea60.Thecombination ofautomatic detection and,automatic totalfloodingC02suppression providesreasonable assurance thatafireinvolving fixedcombustibles inFireArea60wouldnotspreadintotheCD,'attery Roomenclosure, ignitethebatterycasings,and.'adversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic, detection andsuppression systemswilltendto-mitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.Page9-122 Conclusion Basedontheaboveevaluation, reasonable

-assurance isprovidedthatafireinFireArea45orFireArea60wouldnot'mpair safeshutdowncapabilities ofD.C.CookUnit2.Inaddition, thisevaluation doesnot.adversely impactonotherevaluation orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion aresummarized as'.follows:(1)Anequivalent fireseverityof5-10minutesisrequiredtoraisethetemperature ofload-carrying structural steeluptoitsfailurepointof1000F.(2)Thesteelplatehatchisnotaload-carrying structural'~

component; however,a5-10minutefireseveritycanbeusedto,establish aconservative.'ase

-.abovewhichfailurecouldbepostulated without.additional fire.protection.

(3)FireArea45hasan*equivalent.

'fire.severity of30".minutes;however,automatic detection andautomatic C02suppression shouldresultindetection andsuppression~

ofafireinFireArea45initsincipient stages.Increases in'thefixedand/or.transient combustible':

loadingsinFireArea45wouldbemitigated bythepresenceofautomatic suppression systems,providedth'at"'the'ncreases donotexceedthecapabilities ofthesuppression systems.(4)FireArea60hasanequivalent fireseverityof30minutes;however,automatic detection andautomatic C02suppression (exceptfortheCDBatteryRoom)should-.'esult indetection andsuppression ofafireinFireArea60initsincipient

'stages.Increases inthefixedand/ortransient combustible loadingsinFireArea60(excluding theCDBatteryRoom)wouldbemitigated bythepresenceofautomatic suppression systems,providedthattheincreases donotexceedthe'apabilities ofthesuppression systems.Page9-123 (5)Theonlycombustible materials intheBatteryRoomenclosure arethebatterycasings.Firewouldhavetospreadintotheenclosure fromtheremainder ofFireArea60.(6)ShouldafireoccurineitherFireArea45orFireArea60,completealternate capability isprovidedoutsideofbothfireareasusingUnit1equipment.

(7)Replacing thesteelplatehatchwithoneoffire-rated construction would'otsignificantly enhancetheprotection providedbytheexistingconfiguration.

9.20FireZone47BandFireArea60HatchEvaluation

~PuroseThepurposeofthisevaluation istoan'alyze'the impa'ctofanunratedsteelplatehatchlocatedbetweentheUnit24kVSwitchgear.Room andtheUnit2Switchgear RoomCableVault(FireZone47B.and'Fire Area60,respectively) onredundant safeshut-downcapability..

Athree-hour fire-rated, hatchassemblyisnotcommercially.

availab'le for"usein".thislocation.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.*FireZone47Bislocatedonthe609ft-6in.elevation oftheAuxiliary Building.

,ItispartofalargerfireareathatincludesFireZone'47A.

=FireArea60islocateddirectlyaboveFireZone47Bonthe625ft-10in.elevation.

Thebarrierseparating thetwoareasisconstructed ofreinforced concretewitha,three-hour firerating;however,anunratedsteelplatehatchintheceilingofFireZone47BprovidesaccesstoFireArea60.Page9-124 SafeShutdownEuimentFireZone47BandFireArea60containcablesandequipment requiredforsafeshutdownofD.C.CookUnit2.Should.afireoccurineitherFireZone47BorFireArea60,completealternate shutdowncapability outsideofthefireareaorzoneisprovidedusingUnit1equipment.

FireProtection EuimentAutomatic ionization andinfrareddetection systemsareinstalled inFireZone47BandFireArea60.Anautomatic totalfloodingCO2suppression.

systemisprovidedinFireZone47B.Anautomatic totalfloodingC02,suppression systemisalsoprovidedinFireArea60,exceptthatcoverage.

doesnotextend'.into

-theCDBatteryRoom.(Thehatchisnotlocatedin'the.CD BatteryRoom.)Manualsuppression capabilities in.theform.'of.'portable Cextinguishers andhosestations"are"=.,available,<<for useinboth'-.FireZone47BandFireArea60.FireHazardsAnalsisAThesteelplatehatchislocatedinthefloor/ceiling assemblyseparating FireZone47Bonthe609ft-6in.elevation fromFireArea60onthe625ft-10in.elevation.

Forafireto'ropagate betweenFireZone47B=andFire.Area60,afireofsufficient durationandintensity wouldberequiredtochallenge theinherentfireprot,ectioncapabilities ofthesteelplatehatch.Page9-125 Thefailurepointofexposedstructural steelistakentobewhenitsload-carrying capability isreducedto60%ofitsyieldstrength.

This,limitnormallyoccurswhenthetemperature

-ofthesteelreaches1000F.UndertheASTMK119StandardTime-'pemperature curve,anequivalent fireseverityof5-10minutesisr-.equired toachieve'this temperature.

Althoughthe'steel plateh'atchisnot,aload-carrying structural component, thefailurecriteriaofstructural steelcanbeappliedtothesteelplatehatchtoestablish aconservative baseabovewhichfailurecouldb'epostulated.

FireZone47Bhasa'ixedcombustible loadingofunder3g,000-Btu/ft...'for anequivalents fireseverityof'approximately 2.,25minutes.;

.(The.actualcombustible loading"andequivalent fireseverity, existing;at,.this timeare17,136Btu/ftand12.9m'inutes,'.respectively.

~Anequivalent.

fireseverity'of25minuteswouldraisethetemperature

'ofthehatchtoover1000Fifthef'irewasnotpromptlydetectedandextingui'shed.

Anautomatic totalfloodingCO2suppression systemactuatedbyionization andinfrareddetectors isprovidedinFireZone47B.Thecombination ofautomatic detection andautomatic totalfloodingCO2suppression-provides reasonable

.assurance thatafireinvolving fi'xedand/ortransient combustibles inFireZone47Bwouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemswilltendtomitigatePage9-126 increases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases-donotexceedthecapabilities ofthesuppression system.FireArea60hasafixedcombustible loadingofapproximately 40,000Btu/ftforanequivalent fireseverityofapproximately 30minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare25,487Btu/ftand19minutes,respectively.)

Anequivalent fireseverityof30minuteswouldraisethetemperature ofthesteelplatehatchtoover.1000oF ifthefirewasnotpromptlydetectedandextinguished.

An.automatic totalfloodingC02suppression system(vhichdoesnotprotect,the,CDBatteryRoom)=actuated byionization andinfrareddetectors is~providedin-Fire,Area60:Thecombination ofautomatic detection and.automatic totalfloodingC02suppression

.provides reasonable assurance thatafireinvolving fixedand/ortransient combustibles inFireArea60wouldnotadversely impactonthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistence oftheautomatic detection andsuppression systemsvilltendtomitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles, providedthattheincreases donotexceedthecapabilities ofthesuppression system.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireinFireZone47BorFireArea60wouldnotPage9-127 impairsafeshutdowncapabilities ofD.C.CookUnit2.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion aresummarized asfollows:(1)(2)(3)An-equivalent fire'severity of5-10minutesisrequiredtoraisethetemperature ofload-carrying structural steeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carrying structural component; however,a5-10minutefireseveritycanbeusedtoestablish aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

FireZone47Bhasanequivalent fireseverityof25minutes;however,automatic detection andautomatic C02suppression wouldresultin-detection andsuppression ofafireinFireZone47Binitsincipient stages.Increases

-inthefixedand/ortransient combustible loadingwouldbemitigated bythepresenceofautomatic detection.and suppression systemsinFireZone478,providedthattheincreases donotexceedthecapabilities ofthesuppression system.n4(4)(5)'(6)FireArea60.hasanequivalent fireseverityof30minutes;however,automatic detection andautomatic C02suppression (exceptfortheCDBatteryRoom)wouldresultindetection andsuppression ofafireinFireArea60initsincipient stages.Increases inthefixedand/ortransient combustible loadingswouldbemitigated bythepresenceofautomatic detection andsuppression systemsinFireArea60(excluding theCDBatteryRoom),providedthattheincreases donotexceedthecapabilities ofthesuppression systems.ShouldafireoccurineitherFireZone47BorFireArea60,completealternate capability isprovidedoutsideofthefireareaorzoneusingUnit1equipment.

Replacing thesteelplatehatchwithoneoffire-rated construction wouldnotsigni'ficantly enhancetheprotection providedbytheexistingconfiguration.

Page9-128 9.21FireZone110andFireZone43DoorEvaluation

~PuruseThepurposeofthisevaluation istoanalyzetheimpactofthreeunrateddoorassemblies located,betweentheUnit1MainSteamAccessway andtheAccessControl.Area(Fire,Zone110'nd~FireZone43,respectively) onredundant safeshutdowncapability.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZone110ispartofalarger.;,fire

.,'area'that also:includesFireZone108andtheentiretyoftheTurbine-Building&,

eFireZone110originates on'he587ftelevation andisconnected totheTurbineBuildingthroughanunrateddooronthis.elevation'nd bysteamlineopenings'onthe609ftelevation..

FireZone110risesupthroughthe609ftelevation alongtheeastandwestPwallsofFireZone43,withtheportionalongtheeastwalljoiningFireZone108onthe633ftelevation andtheportionalongthewestwallterminating belowthe633ftelevation.

The+,portionofFireZone110alongthewestwallofFireZone43isopentoFireZone91intheTurbineftelevations forsteampipeaccessBuildingfromthe620to631-totheturbines.

FireZone43ispartofalargerfireareathatincludesFireZones37,.Page9-129 44S,and44Nand44Athrough44H,allofwhicharelocatedonthe609.ftelevation oftheAuxiliary Building.

Theeastwallof,.FireZone43isseparated fromFireZone110bythree-hour-rated construction.

ThewestwallofFireZone43isseparated fromFireZone110by,three-hour-rated construction; however,threeunrateddoorassembl,ies ofhollowmetalconstruction provideaccessintoFireZone,110,fromtheRadiation ControlOfficeinFireZone43.SafeShutdownEuimentFireZone110doesnotcontainsafeshutdown-'equi'pment" orcables.FireZone..108,,

which~ispartofthesamefire'area,contains.,cables,

.valves,andinstrumentation associated withsafeshutdown.

ofD.C.CookUnit'1usingSteamGenerators 2.and3.GivenafireinFire~.Zones108'*or110;redundant safeshutdown,capability's

.',provided, using-valves'nd instrumentation associated with.Unitl.Steam.Generators 1'and4locatedinFireZones33and33A,which,are.partofa,separate;.~fire

.area.FireZone43containscablesassociated withsafeshutdownofD.C.CookUnit1.Alternate shutdowncapability isprovidedoutsideofthisfirezoneusingUnit'equipment andeitherUnit1SteamGenerators 2and--3'rUnit1SteamGenerators 1and4.Thecables,valvesandinstrumentation locatedinFireZone108arenotrequiredto'ensuresafeshutdowncapability givenafireinFireZone43,asalternate shutdowncapability isprovidedinFireZones33and33A.Page9-130 FireProtection EuimentAnautomatic ionization detection system-is

.installed belowthesuspended ceilinginFireZone'3,withonedetectorprovidedintheRadiation ControlOfficethatabutsFireZone110.FireZone43isnotprotected byautomatic suppression.

Automatic detection andautomatic.

suppression are-not.provided "inFireZone110.Manualsuppression capabilities in-theformofportable'xtinguishers andhose,stations areavailable foruseinbothzones.FireHazardsAnalsix;,Fire.Zone43hasafixedcombustible loadingofunder80,000Btu/ftforanequivalent fireseverity:of.-60'minutes.'-(The'ctual combustible loadingandequivalent fireseverity'existing't thistimeareunder74,361Btu/ftand55.8-respectively.)

Transient combustibles inthisfirezonearelimitedto'aterials'eing.

broughtintothe"Auxiliary

'uilding.

FireZone43isthe'ccess controlareatotheAuxiliary Buildingand,assuch,isnormallymanned;however,duringsomebackshiftperiodswithreducedmanning,RPdutiesmayrequirethezonetobeunoccupied.'utomatic detection isprovidedinthiszone,withonedetector,-

locatedintheRadiation ControlOffice.-Thethreeunrateddoors'oFireZone110arelocatedinthisofficeandarenoteasily"accessible duetofilecabinets,beingplacedupagainstthem.Thecombination oflowfireloading,automatic detection, andnormalmanningofthefirezoneprovidesreasonable assurance Page9-131 thatfirewillbequicklydiscovered andextinguished.

Assuch,thedoorsprovideadequateprotection barrier.fortheopeninginthe0FireZone110hasafixedcombustible loadingofunder27,000Btu/ftandequivalent fireseveritylessthan20minutes.(!Theactualcombustible loadingand,equivalent fireseverityexistingatthistimeare803Btu/ftand0.6minutes,respectively.)

Tiansient combustibles intheformofwoodandoxy-acetylene cylinders aresometimes storedonthe587ftelevation ofFireZone110.Thecombustible'-

loading"'and"equivalent fire.severityinFireZone.110duetotransient combustibles

.areunder.,40,000:Btu/ftand30minutes,r>espectively.

-.Thebottomofthe.threeunrateddoorsarelocatedapproximately 22ftabove,thefloorofthiszonein'verticalshaft*along.th'e',-eastwall.of'theshaftandthewestwallofFireZone43.Based~upon.theirlocation, thedoorswouldnotbedirectlyexposedto,fire..

Inordertoimpact-,.on thedoors,heatandhotgaseswouldhavetoriseuptheshafttobelowthe633ftelevation andbankdowntothelevelofthedoors.Mainsteampipingpenetrations existinthewestwallofFireZone110connecting itwithFireZone91oftheturbineBuilding.

HeatandhotgasesrisinguptheshaftwouldtendtospilloutintotheTurbineBuildingandnotbankdowntheshafttothelevelofthedoors.Basedontheamountoffixedcombustibles andthePage9-132 anticipated amountoftransient combustibles, reasonable assurance isprovidedthatafireinFireZone"110wouldnotadversely impactonthe.capability

'ofthedoorstoprotecttheopeningsinthebarrier.Conclusion Basedontheaboveevaluation, reasonable assurance'is providedthatafire,inFire.Zone43orFireZone110wouldnot;impairthesafeshutdowncapabilities ofD.C.CookUnitl.Inaddition, thisevaluation doesnotadversely impactonotherevaluation orexemption requestscontained inthisreport.Thebasesthatjustifythe.conclusion.

aresummarized asfollows:(2)(3)FireZone43has-,.anequivalent-.fire severity"of under-60minutes.~1~IPireZone43istheaccess.control.areaandisnormallymanned..Transient

.combustibles arelimitedtomaterials beingbroughtintotheAuxiliary Building.

PireZone43isprovidedwithanautomatic detection system,withonedetectorintheRadiation ControlOfficethatabutsFireZone110.(4)(5)(6)FireZone1/0hasfixedcombustible loadingunder27,000Btu/ft(combustible loadingexistingatthistimeisnegligible).

Transient combustibles, intheformofwoodandoxy-acetylene cylinders, wouldbelocatedonthe587ftelevation ofFireZone110withacombustible loadingandequivalent fireseverityofunder40,000Btu/ftandlessthan30minutes,respectively.

Thebottomofthedoorsarelocatedinaverticalshaftapproximately 22ftabovethefloorofFireZone110.Page9-133 Inordertoimpactontheunratedhollowmetaldoors,heatandhotgasesfromafireinFireZone110wouldhavetoriseuptothetopoftheshaft(atapproximately the633ftelevation) andbankdowntothelevelofthedoors.(8)Mainsteam.-line openingsfromFireZone110toFireZone91oftheTurbineBuildingbetweenthe620and631ftelevations allowproductsofcombustion tospilloutintotheTurbineBuildingasopposedtobankingdowntothelevelofthedoors.etc,(9)GivenafireinFireZones108or110,redundan't safeshutdowncapability isprovidedinFireZones33and33A,whicharelocatedinaseparatefirearea.(10)GivenafireinFireZone43,redundant safeshutdowncapability isprovidedusingeitherUnit1steamgenerators" 2and3(withcables'alves,"

and'nstrumentation locatedinFireZone108)orUnit1steamgenerators

'and4(withcables,valves,andinstrumentation locatedinFireZones33and33A).e(ll)Replacing:the unratedhollowmetaldoorswithratedfire.door~assemblies Pwouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

9>".22FireZoneill:andFireZone44SDoorEvaluation

'p.ureeThepurposeofthis.evaluation is.toanalyzetheimpactofthreeunrateddoorassemblies locatedbetweentheUnit2MainSteamAccessway andthesouthendofthe609ftelevation oftheAuxiliary Building(FireZoneillandFireZone44S,respectively)

'on,redundant safeshutdowncapability.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-134 DescritionFireZoneillispartofalargerfireareathatalsoincludesFireZone109andtheentiretyoftheTurbineBuilding'.

FireZoneilloriginates onthe587ftelevation andisconnected totheTurbineBuildingthroughanunrateddooronthiselevation andbysteamlineopeningsonthe609ftelevation.

'ireZone111risesupthroughthe609ftelevation alongtheeastandwestwallsofFireZone44S,withtheportionalongtheeastwalljoiningFireZone109onthe633ftelevation andtheportionalongthewestwall+terminating belowthe633ftelevation.

TheportionofFireZoneillalongthewestwallofFireZone44Sis'pentoFireZone96in-theTurbineBuildingfromthe-620to631ft,elevations forsteampipeaccesstotheturbines."

'.FireZone44SispartofalargerfireareathatincludesFireZones37,44S,and44Nand44Athrough44H,allofwhicharelocatedonthe.",609ftelevation oftheAuxiliary Building.

ThewestwallofFireZone44Sis.separated fromFireZoneillbythree-hour-rated construction; however,threeunrateddoorassemblies ofhollowmetalconstruction thatarepadlocked shutprovideaccessintoFireZoneillfromFireZone44Sdirectlywestofthecomponent coolingwater(CCW)pumps.SafeShutdownKuimentFireZoneilldoesnotcontainsafeshutdownequipment orcables.FireZone109,whichispartofthesamefirearea,containscables,valves,andinstrumentation associated withsafePage9-135 shutdownofD.C.CookUnit2usingsteamgenerators 2and3.Givenafire'inFireZones109orill,redundant safeshutdowncapability isprovidedusingvalvesandinstrumentation associated withUnit2steamgenerators 1and4locatedinFireZones34and34A,whicharepartofaseparatefirearea.FireZone44Scontains.cablesandequipment associated withsafeshutdownofD.C.CookUnits1and2.Athree-hour barrierhasbeenprovidedbetweentheUnit1andUnit2CCWpumpstoensureavailability ofoneunit'spumpsgivenafireinthevicinityoftheCCWpumps.Alternate shutdown'apabi"1'ity

'isprovidedoutsideofthisfirezoneusingUnit1equipment andeither.Unit2.steamgenerators 2and3orUnit2steamgenerators

.1"'.and4.Thecables,"valvesandinstrumentation locatedinFireZone109are,notrequiredtoensuresafeshutdowncapability given:afireinFireZone'.44S,asalternate shutdowncapability isprovidedinFireZones34and34A.FireProtection EuimentAutomatic detection andautomatic suppression arenotprovidedin,FireZoneill.FireZone44Sisprovidedwithanionization detection system.Adrypilotpreaction sprinkler

/systemisinstalled

.in.FireZone44S.Thispilot-actuated sprinkler systemisextendeddirectlyovertheCCWpumpstosprayagainsttheCCWpumpbearings.

Manualsuppression capabilities intheform.ofportableextinguishers andhosestationsareavailable foruseinbothzones.Page9-136 FireHazardsAnalsisFireZone44Shasafixedcombustible loadingofunder33,000Btu/ftforanequivalent fireseverityofapproximately 25minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare19,192Btu/ftand14.22minutes,respectively.)

Anionization detection systemandadrypilotpreaction sprinkler systemarelocatedinthiszone.Enhancedprotection isprovidedovertheCCWpumpsfromthispilot-actuated sprinkler systemtosprayagainstthepumpbearings.

Thecombi.nation ofautomatic detection andthepilot-actuatedsprinkler systemcoveringthezoneandtheCCWpumpbearingsensureearlydetection andsuppression ofafireinthezone.Thisprovidesreasonable assurance thatthethreeunratedhollow-metal doorsadequately protecttheopeningsinthebarriertoFireZoneill.Theexistence oftheautomatic detection andsuppression systemswilltendtomitigateincreases inthefixedcombustible loadingorthepresenceoftransient combustibles,'rovided thattheincreases"do notexceedthecapabilities ofthesuppression system.FireZone111hasafixedcombustible loadingofunder27,000Btu/ftandequivalent fireseveritylessthan20minutesI(theactualcombustible loadingandequivalent fireseverityexisting.

atthi'stimeare838Btu/ftand0.6minutes,respectively.)

Transient combustibles

'ntheformofwoodandoxy-acetylene cylinders aresometimes storedonthe587ftPage9-137 elevation ofFireZoneill.Thecombustible loadingandequivalent fireseverityinFireZone111duetotransient combustibles areunder40,000Btu/ftandlessthan30minutes,respectively.

Thebottomof.thethreeunrateddoorsarelocatedapproximately 22ftabovethefloorofthiszoneinaverticalshaftalongtheeastwallofFireZoneillandwestofFireZone44S.Basedupontheirlocation, thedoorswouldnotbedirectlyexposedtofire.Inordertoimpactonthedoors,heatandhotgaseswouldhave'oriseuptheshafttobelowthe633ftelevation andbankdowntothelevelofthedoors.

Mainsteam'pipingpenetrations existinthewestwallofFireZoneill'connecting itwithFireZone96ofthe.TurbineBuilding.

Heatandhotgasesrisi'nguptheshaftwould.tendtospilloutintotheTurbineBuildingandnotbankdowntheshafttothelevelof'thedoors.Basedontheamountoffixedcombustibles andtheanticipated amountoftransient combustibles, reasonable assurance isprovidedthatafireinFire,Zoneillwouldnotadversely impactonthecapability ofthedoorstoprotecttheopeningsinthebarrier.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafire.inFireZone44SorFireZoneillwouldnotimpairthesafeshutdowncapabilities ofD.C.CookUnits1or2.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-138 Thebasesthatjustifytheconclusion aresummarized asfollows:(1)-FireZone44Shasanequivalent fireseverityof25minutes.(2)(3)(4)(5)(7)(8)A'utomatic detection anddrypilotpreaction sprinklers areprovidedinthiszone.Enhanced, protection isprovidedovertheCCWpumpsfromthepilot-actuated suppression systemthatsprayswaterontheCCWpumpbearings.

Increases inthefixedand/ortransient combustible loadingsinFireZone44Swouldbemitigated bythepresenceoftheautomatic detection andsuppression systems,providedthattheincreases donotexceedthecapabilities ofthesuppression system.FireZoneill'asafixedcombustible loadingunder27,000Btu/ft(Theactual,combustible loadingexistingatthistimeisnegligible.)'ransient combustibles intheformofwoodandoxy-acetylene cylinders wouldbelocatedon.the587ftelevation ofFireZoneill'ithacombustible loadingandequivalent fireseverityofunder40,000Btu/ft~andlessthan30minutes,respectively."

Thebottomofthedoorsarelocatedinaverticalshaftapproximately 22ftabovethefloorofFireZone111.Inordertoimpactontheunratedhollowmetaldoors,heatandhotgasesfromafireinFireZoneillwouldhavetoriseuptothetopoftheshaft(atapproximately the633ftelevation) andbankdowntothelevelofthedoors.(9)MainsteamlineopeningsfromFireZoneilltoFireZone96oftheTurbineBuildingbetweenthe620and631ftelevations allowproductsofcombustion tospilloutintotheTurbineBuildingasopposed,tobankingdowntothelevelofthedoors.(10)GivenafireinFireZones109orill,redundant safeshutdowncapability isprovidedinFireZones34and34A,whicharelocatedinaseparatefirearea.Page9-139 (11)GivenafireinFireZone44S,redundant safeshutdowncapability isprovidedusingeitherUnit2SteamGenerators 2and3(withassociated cables,valves,andinstrumentation locatedinFireZone109)orUnit2SteamGenerators 1and4(withassociated cables,valves,andinstrumentation locatedinFireZones34and34A).(12)Replacing theunratedhollowmetaldoorswithratedfiredoorassemblies wouldnotsignificantly enhanceprotection providedbytheexistingconfiguration.

9.23FireArea116BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactoftwomanwayopeningsconnecting FireArea116withadjacentfireareasonredundant safeshutdowncapability.

Inaddition, thisevaluation does-notadversely impactonotherevaluations orfexemption requestscontained inthisreport.SqFireArea116'isapipetunnellocatedentirelybelowgradelIthattravelsfromtheeastsideofUnit1Containment tothewestsideofUnit1Containment.

FireArea116isatthe593ftelevation alongtheeastandnorthsidesofUnit1Containment.

Ontheeastside,itisaccessedbyaladderopeninginthefloorofFireZone33atthe612ftelevation.

Alongthewestsideandv'ora.shortdistanceonthenorthsideofUnit1Containment, FireArea116isat.the586ftelevation.

AccessdownintothetrenchonthewestsideisfromaladderinFireArea12atthetPage9-140 591ftelevation.

ThetrenchopensdirectlytoFireArea116alongthenorthwallofFireArea12.Adistanceinexcessof250ftseparates theopeningsfromFireArea116toFireArea12andFireZone33.SafeShutdownEuimentFireArea116containsnosafeshutdownequipment.

FireZone33containsthefollowing valvesandassociated cablingforSteamGenerators 1and4:oSafetyvalvesoAFWfeedregulation valvesoPressuretransmitters oMSIVsoPORVsoLSIpanelFireZone12containsthefollowing valvesandassociated cablingforSteamGenerators 2and3:oAFW.feedregulation valvesoContainment sumptoRHRpumpsuctionvalveoLSIpanelShouldafireinvolveb'othFireZone33andFireArea12,thepotential existstolosepowertocontrolthepositionoftheAFWfeedregulation valvesforallfoursteamgenerators.

However,thevalvesarenormallycablestothesevalves,theyfailopen.Shouldfiredamagetheasis,whichisintheopenposition.

Page9-.,141 FireProtection EuimentAutomatic suppression andautomatic detection arenotprovidedinFireArea116orFireArea12.Automatic detection wasproposedforthefireareacontaining FireZone33intheMarch1983AppendixRSubmittal tosupportthefixedareasuppression exemption requestforalternate shutdown.

Manualsuppression capabilities intheformofportableextinguishers areavailable foruseintheselocations withhosestationalsoavailable foruseinFireZones33A,33BandFireArea12.Twohosestationsarecurrently beinginstalled inFireArea12.FireHazardsAnalsisFireArea116hasafixedcombustible loadingandresulting equivalent fireseverityofunder13,000Btu/ftand10minutesrespectively.

(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare437Btu/ftand0.2minutes,respectively.)

Transient combustibles arenotpostulated inthisareaasitisaradiation areawithaccesscontrolled byHealthPhysics,andaccesstotheareaisvialadders.Maintenance activities areminimalinthisarea,,and itisnotanormalaccessroutetoanyotherplantlocations.

Reasonable assurance isprovidedthatafireinFireArea116wouldnotpropagate outintoeitherFireZone33orFireArea12.Therefore, thetwomanwayopeningsdonotadversely impactonthecapabilities oftheboundaries ofFireArea116.Page9-142 FireArea12hasafixedcombustible loadingofunder20,000Btu/ftforanequivalent fireseverityofunder15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare1,722Btu/ftand1.2minutes,respectively.)

Maintenance activities areminimalinthisarea,anditisnotanormaltravelroutetoanyotherplant,locations.

Assuch,minimaltransient combustibles arepostulated inFire~Area12.Shouldafireoccurinthisarea,theproductsofcombustion wouldtendtorisetoceilinglevel.AsthemanwayopeningtoFireArea116isaccessedviaaladdertoatrench/belowthenormalfloor'levelofFireArea12,reasonable assurance isprovidedthatafireinFireArea12wouldnotpropagate outintoFireArea,116.Therefore,-

themanwayopeningfromthetrenchthatconnectsFireArea116andFireArea12doesnotadversely impactonthecapabilities ofthebarrierseparating thetwoareas.FireZone33ispartofafireareathatalsocontainsFireZones33A,33Band105.Theaveragefixedcombustible loadinginthefireareaisunder27,000Btu/ft-foranequivalent fireseverityofunder20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeareunder11,530Btu/ftandlessthan8.5minutes,respectively.)

Tran-sientcombustibles arepostulated inFireZone33AasitprovidesPage9-143 accesstoboththeUnit1Containment andtheContractors AccessControlArea(FireZone122andFireArea105,respectively) andFireZone33.FireZone33Aisahighceilingarea.Assuch,productsofcombustion fromfireoccurring inthiszonewouldtendtorisetoceilinglevel.Theseproductsofcombustion couldpropagate intoFireZone33throughthewalkway.openingandunsealedpipingpenetrations.

Thiswould,however,have,minimalimpactontheladderopeningtoFireArea116asFireZone33isahighceilingarea,andtheladderopeningislocatedinthefloorofFi.reZone33.Reasonable assurance isprovidedthatafireinthefire'areacontaining FireZone33wouldnotpropagate downintoFire-Area116throughtheladderopening.Therefore, theladder.<opening thatconnects'ire Zone33andFireArea116doesnot~adversely impactonthecapabilities ofthebarrierseparating

.thetwo.WhileFireArea116couldbecombinedwitheitherFireArea12orFireZone33,itismaintained asaseparatefireareaforthepurposesofthisevaluation.

Conclusion Basedontheaboveevaluation,

-reasonable assurance isprovidedthatthetwomanwayopeningsconnecting FireArea116withFireArea12andFireZone33donotimpairredundant safeshutdowncapability.

In'ddition, thisevaluation doesnotadversely impactorotherevaluations orexemption requestscontained inthisreport.Page9-144 Thebasesthatjustifythisconclusion aresummarized asfollows:FireArea116hasacombustible loadingoflessthan13,000Btu/ftforanequivalent fireseverityof10minutes.(2)(3)(4)(5)(6)(7)Thecombustible loadinginFireArea12isunder20,000Btu/ftforafireseverityoflessthan15minutes.Thefireareacontaining FireZone33hasanequivalent fireseverityofunder20minutes.Firesoccurring inthefireareacontaining FireZone33wouldtendtorisetoceilinglevels.TheaccessopeningtoFireArea116fromFireArea12isbelow"thenormalfloorlevelofFireArea12;theaccessopeningtoFireArea116fromFireZone33isviaaladderopeninginthefloorofFireZone33.Adistanceinexcessof250ftseparates themanwayopening'onnecting FireArea12andFireZone33withFireArea116.Shouldafirepropagate betweenFireArea12andFireZone33throughFireArea116,therewouldbenoimpact'onsafeshutdowncapability astheAFWfeed'regulation valvesallfailasis,whichisintheopenposition.

Protecting themanwayopeningstoFireArea116fromFireArea12andFireZone33withfireratedmaterialwouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

9.24FireArea117BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactoftwomanwayopeningsconnectFireArea117withadjacentfireareasonredundant safeshutdowncapability.

Inaddition, thisPage9-145 evaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireArea117isapipetunnellocatedentirelybelowgradethattravelsfromtheeastsideofUnit2Containment tothewest.sideofUnit2Containment.

FireArea117isatthe593ft.-elevation alongtheeastandsouthsidesofUnit2Containment.

Ontheeastside,itisaccessedbyaladderopeninginthefloorofFireZone34atthe612ft.elevation.

AlongthewestsideandforashortdistanceonthesouthsideofUnit2Containment, FireArea117isatthe586ftelevation.

Accessdownintothe.trenchonthewestsideisfromaladderinFireArea22atthex591ftelevation.

ThetrenchopensdirectlytoFire'rea117F-'longthesouthwallofFireArea22.Adistanceinexcessof~250ftseparates theopeningsfromFireArea117toFireArea22~andFireZone34.SafeShutdownEuimentFireArea117containsnosafeshutdownequipment.

FireZone'34containsthefollowing valvesandassociated cablingforsteamgenerators 1and4:oSafetyvalvesoAFWfeedregulation valvesoPressuretransmitters oMSIVsoPORVsoLSIpanelPage9-146 FireZone22containsthevalvesandassociated cablingforsteamgenerators 2and3:oAFWfeedregulation valvesoContainment sumptoRHRpumpsuctionvalveoLSIpanelShouldafireinvolvebothFireZone34andFireArea22,thepotential existstolosepowertocontrolthepositionoftheAFWfeedregulation valvesforallfoursteamgenerators.

However,thevalvesarenormallyopen.Shouldfiredamagethecablestotheseva1ves,~theyfailasis,whichisintheopenpo'sition.

FireProtection EuimentAutomatic

.suppression andautomatic detection arenotprovidedinFireArea117orFireArea22.Automatic detection wasproposedforthefireareacontaining

,Fire.Zone34intheMarch1983AppendixRsubmittal tosupport'he fixedareasuppression exemption requestforalternate shutdown.

Manualsuppression capabilities intheformofportableextinguishers areavailable foruseintheselocations, withhosestationsalsoavailable foruseinFireZone34A,34BandFireArea22.Twohosestationsarecurrently beinginstalled inFireArea22.FireHazardsAnalsisFireArea117hasafixedcombustible loadingofunder13,000Btu/ftwithare'sultant equivalent fireseverityoflessthan10minutes.(Theactualcombustible loadingandequivalent Page9-147 fireseverityexistingatthistimeare515Btu/ftand0.4,minutes,respectively.)

Transient combustible arenotpostulated inthisareaasitisa-radiation areawithaccesscontrolled byHealthPhysics,andaccesstotheareaisvialadders.Maintenance activities areminimalinthisarea,anditisnota:.'normal accessroutetoanyotherplantlocations.

Reasonable

'assurance isprovidedthatafireinFireArea117wouldnotpropagate outintoeitherFireZone34orFireArea22.Therefore, thetwomanwayopeningsdonotadversely impactonthecapabilities oftheboundaries ofFireArea117.FireArea22hasacombustible loadingofunder13,000'.Btu/ftforanequivalent fireseverityofunder10minutes.<'(Theactual'combustible loadingandequivalent fireseverity.,existing atthistimeare1,022Btu/ftand0.6,minutes".";respectively.)-

Maintenance activities areminimalinthisarea,.,anditis'notanormaltravel-routetoanyotherplantlocations.

Assuch,minimaltransient combustibles arepostulated inFireArea22.Shouldafireoccurinthisarea,theproductsofcombustion wouldtendtorisetoceilinglevel.AsthemanwayopeningtoFireArea117isaccessedviaaladdertoatrench.belowthenormalfloorlevelofFireArea22,reasonable

~assurance isprovidedthatafireinFireArea22wouldnotPage9-148 propagate outintoFireArea117.Therefore, themanwayopeningfromthetrenchthatconnectsFireArea117andFireArea22doesnotadversely impactonthecapabilities ofthe.barrierseparating thetwoareas.FireZone34ispartofafireareathatalsocontainsFireZones34Aand34B.Theaveragefixedcombustible loadinginthefireareaisunder20,000Btu/ftforanequivalent fireseverity.ofunder15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeareunder5,909Btu/ftandlessthan5minutes,respectively.)

Transient combustibles arepostulated inFireZone34AasitprovidesaccesstobothFireZone34andUnit2Containment.

FireArea34Aisahighceilingarea..Assuch,.products, ofcombustion fromfiresoccurring inthiszonewouldtendtorisetoceilinglevel.Theseproductsofcombustion couldpropagate intoFireZone34throughthewalkwayopening.andunsealedpipingpenetrations.

Thiswould,however,haveminimalimpactontheladderopeningtoFireArea117asFireZone34isalsoahighceilingarea,andtheladderopeningislocatedinthefloorofFireZone34.Reasonable assurance thefireareacontaining FireZoneisprovidedthatafirein34wouldnotpropagate downintoFireArea117throughtheladderopening.Therefore, theladderopeningthatconnectsFireZone34andFireArea117doesnoadversely impactonthecapabilities ofthebarrierseparating Page9-149

'hetwo.WhileFireArea117couldbecombinedwitheitherFireArea22orFireZone34,itismaintained asaseparatefireareaII.forthepurposesofthisevaluation.

Conclusion Basedontheaboveevaluation, reasonable assurance ispro'vided thatthetwomanwayopeningsconnecting FireArea117'withFireArea22andFireshutdowncapability.

InZone34donotimpairredundant safeaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifythisconclusion aresummarized as,.follows:

(1)FireA~ea117hasacombustible loadingofunder13,000Btu/ftforanequivalent fireseverityofunder10minutes.(2)(3)(4)Thecombustible loadinginFireArea22isunder13,000Btu/ftforanequivalent fireseverityoflessthan10minutes.Thefireareacontaining FireZone34hasanequivalent fireseverityofunder15minutes.=Firesoccurring inthefireareacontaining FireZone34wouldtendtorisetoceilinglevels.(5)TheaccessopeningtoFireAreaisbelowthenormalfloorlevelaccessopeningtoFireArea117viaaladderopeninginthefloor117.fromFireArea22ofFireArea22;thefromFireZone34isofFireZone34.(6)Adistanceinexcessof250ft'eparates themanwayopeningsconnecting FireArea22andFireZone34throughFireArea117.P'age9-1'50 (7)Shouldafirepropagate betweenFireArea22andFireZone34throughFireArea117,therewouldbenoimpactonsafeshutdowncapability astheAFWfeedregulation valvesallfailasis,whichisintheopenposition.

(8)Protecting themanwayopeningstoFireArea117fromFireArea22andFireZone34withfireratedmaterialwouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.

9.25Essential ServiceWaterPumHouseHatchandFareDamerEvaluation

~PuruseThepurposeofthis'valuation istoanalyzetheimpactof:(1)anunratedsteelplatehatchlocatedbetweentheceilingoftheCirculating WaterPumpMotorControlRoom,FireZone29G,andthefloorofUnit2ESWPumpCubicle,FireZone29C(athree-hour Ifire-rated hatchassemblyisnotcommercially available foruseinthis.location);

(2)undampered ventilation ductslocatedintheceilingofFireZones29A,29B,29Cand29D;and(3)screenmeshaccessgatesintotheUnit1andUnit2ESWpumpcubiclesonredundant safeshutdowncapability orthefullareasuppression exemption requestsintheEssential ServiceWater(ESW)PumpHouse.1naddition, thisevaluation doesnotaQversely impactonotherevaluations orexemption requestscontained inthisreport.DescritionFireZone29GislocateddirectlybelowtheUnit1Essential ServiceWater(ESW)PumpCubicles(FireZones29Aand29B),andtheUnit2ESWPumpCubicles(FireZones29Cand29D).FireZones29Aand29Bareseparated fromFireZones29Cand29DbyaPage9-151 three-hour-rated barrier.Undampered HVACsupplyairopeningsexistintheceilingofallfourfirezones,withunsealedpipingpenetrations throughtheceilingoftheUnit1cubiclesandsealedpenetrations through.theceilingoftheUnit2cubicles.

AnopenwalkwayconnectsFireZone29Aand-FireZone29BofUnit1,while.asimilarwalk~ayconnectsFireZone29CandFireZone29D.AnopencurbedstairwayfromFireZone298providesaccesstoFireZone29G,whileanunratedsteelplatehatchintheceilingofFireZone29GprovidesaccesstoFireZone29C.TheESWPumpHouseislocatedwithinthelargerscreenhouse'.area; TheroofoftheESWPumpHouseisatelevation 610ft-0in.,whiletheroofof..theScreenHouseisat.-elevation 635ft-7in.'afeShutdownEuiment<4FireZones,29A'nd29Bcontain'theUnit1EastandWestESWpumps,respectively."

.FireZones29Cand29DcontaintheUnit2EastandWestESW=pumps,"respectively.'he Unit1ESWpumpsprovidealternate shutdowncapability forafi'reoccurring intheUnit2ESWpumpcubicles.

Conversely, theUnit2ESWpumpsprovidealternate shutdowncapability forafireoccurring intheUnit1ESWpumpcubicles.

FireZone'29Gcontainscablesforthecomponents of,both'Units 1'=and,2ESWsystems.Thecablesareinconduit,whichareprotected byminimumone-hourfire-rated materi'al.

Page9-152 FireProtection EuimentAutomatic detection systemsareprovidedintheUnit1ESWpumpcubicles(FireZones29Aand29B)andintheCirculating WaterPumpMotorControlRoom(FireZone29G).(SeeSections8.9.2and8.11.2.)Automatic detection systemsarecurrently beinginstalled intheUnit2ESWpumpcubicles(Fire'Zones 29Cand29D).(SeeSection8.1.0.2.)

Automatic suppression isnotprovidedinanyofthesefirezonesasidentified inexemption requests7.5;7.6,and7.7.Manualsuppression capabilities intheformofportable-extinguishers andhosestationsareavailable forusein.thesezones.FireHazardsAnalsisForafiretoadversely

'mpactonredundant.

safe.shutdowncapability, firemustinvolveUnits1and'-2';ESW..

pumpsandcubicles.

ForafireinFireZones29Aand29B(Unit1ESWpumpcubicles),

alternate shutdowncapability isprovidedbyutilizing Unit.2.ESW pumps.ForafireinFireZones29Cand29D(Unit2ESWpumpcubicles),

alternate shutdowncapability isprovidedbyutilizing Unit1ESWpumps.TherequiredsafeshutdowncablesinFireZone29Ghasbeenprotected byaminimumofone-hourfire-rated

material, thusafireinFireZone29Gwillnotaffectsafeshutdown.

FireZone29GandFireZones29Aand29Bcommunicate byanopenstairway.

Afirecanbepostulated toinvolvethesefirezones(29A,29Band29G).Inthiscase,Unit1ESWpumpsarePage9-153 potentially affectedandUnit2ESWpumps,locatedinFireZones29Cand29D,shouldbeutilizedtoproviderequiredcoolingwaterforbothunits.Thesteel.platehatchislocatedinthefloor/ceiling assemblyseparating FireZone29GfromFireZone29C.Undampered HVACsupplyai,ropenings'xist intheceilingofFireZones29A,298,29C,and29D.,ScreenmeshaccessgatesprovidesaccessintotheUnit1andUnit2ESWpumpsfromtheScreenhouse, FireZone142.Forfiretoadversely impactonredundant safeshutdowncapability, firemusteither:(1)Spreadfrom,FireZone29G'"upthroughtheopenstairwaytoFireZone29BofUnit1andthroughthesteelplatehatchto'FireZone29CofUnit2;,,(2),'pread'rom

'theESWpumpcubiclesofoneunit'(through theopenstairwayofUnit1orthesteelplatehatchof'Unit.;2) down'ntoFire'one29Gandthenpropagate upintothe'SWpumpcubiclesoftheoppositeunitw~*','through the'openstairwayofUnit1orthesteelplatehatchofUnit2);(3)Spreadthroughtheundampered HVACsupplyairopeningsintheceilingsofFireZones.29A,*29B~,

29Cand29D;or(4)SpreadthroughFireZone142intoFireZones29Aand29BandFireZones29Cand29D)viathescreenmeshaccessgatesfromafireoriginating eitherinFireZone142orintheUnit1orUnit2ESWpumpcubicles.

Forthefirsttwofiresthatarepostulated, afireofsufficient durationandintensity wouldberequiredtochallenge theinherentfireprotection capabilities ofthesteelplatehatch.Thefailurepointofexposedstructural steelistakentobewhenitsloadcarryingcapability isreducedto60%of.itsPage9-154 yieldstrength.

Thislimitnormallyoccurswhenthetemperature ofthesteelreaches1000F.UndertheASTME119StandardTime-Temperature curve,anequivalent fireseverityof5-10minutesisrequiredtoachievethistemperature.

Althoughthesteelplatehatchlocatedinthebarrierseparating FireZones29Cand29Gisnotaloadcarryingstructural component, the'failure criteriaofstructural steelcanbeappliedtothesteelplatehatchtoestablish aconservative baseabovewhichfailurecouldbepostulated.

Forthethirdandfourthpostulated fires,afirewouldhavetotravelfromtheESWpumpcubiclesofoneunittotheESWpump.cubiclesoftheotherunit,orintoeach"ofthefourpumpcubiclessimultaneously.

Thepathoffirespreadforthethirdpostulated firewouldhavetobeviatheundampered.

HVACsupplyairopeningsofeachcubicle'ndinvolvethetransient combustible loadingontheroofoftheESWpumphouse.Forthefourthpostulated fire,afirewouldhavetospreadintotheUnit1andUnit2ESWpumpcubiclesthroughtheScreenHouse,FireZone142.Eachisdiscussed separately below.Postulated FireNo.1FireZone29Ghasafixedcombustible, loadingofunder13,000Btu/ftforanequivalent fireseverityofunder10minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeareunder11,858Btu/ftand8.8minutes,respectively.)

Anequivalent fireseverityof10Page9-155 minuteswouldraisethetemperature ofthesteelplatehatchup"to1000F.Significant quantities oftransient combustibles arenotpostulated inFireZone29Gduetoitscontrolled access(vialockedscreengatedoorsintoFireZones29Aand29BandFireZones29Cand29D),andthelackofeasytransport ofcombustibles downintothezone(theopenstairwayfromFireZone29BandtheladderfromthehatchfromFireZone29C).Thestairwayisalsoprovidedwitha6in.highcurbthatwillpreventspilledcombustible liquidsfromflowingdownintoFireZone29Gfromabove.Inconjunction withaccessibility

problems,

'"over200lbsofwood(withaheatpotential of8000Btu/lb)would'berequiredtoraisetheequivalent fireseverityinFireZone"29Gbyoneminute.Sincetherearenopumps,sumps,orother=similarequipment inthezone,lubricating oilisnotpostulated

%asatransient combustible asitisnotrequiredformaintenance

@purposes.

Thecombustible loadinginFireZone29Gwouldraisethetemperature ofthesteelplatehatchupto1000F.However,twoissuesmitigatethepotential forthistooccur.Thefirstistheexistingautomatic detection systeminFireZone29G.'-'Postulated fireswouldbequicklydetectedandannunciated intheControlRoom,resulting infirebrigaderesponsetothezone.ThesecondistheopenstairwaytoFireZones29Aand29B.HeatbuildingupatceilinglevelinFireZone29GwouldtendtoflowupthestairwayintoFireZones29Aand29B.Thiswouldiimitheatbuildupinthevicinityofthesteelplatehatch.Therefore,

'Page9-156 whilefirecouldspreadfromFireZone29GuptheopenstairwaytoFireZones29Aand29B,reasonable assurance isprovidedthatitwillnotsimultaneously spreadthroughthesteelplatehatchintoFireZones29Cand29D.Postulated FireNo.2FireZones29Aand29Bhaveafixedcombustible loadingofapproximately 20,000Btu/ftforanequivalent fireseverityofapproximately 15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare6,842Btu/ftand5.1minutes,respectively.

)Transient combustibles wouldtaketheformoflubricating oilduringchangeoutoftheESWpumps.EachESWpumpcontainsfivegallonsoflubeoilforatotaloftengallons.Assumingthattwofive-.gallon

,cans.(ataheatpotential of146,100.Btu/gal)arebroughtin,formaintenance

purposes, theequivalent

-fireseveritywould.beincreased bylessthan5minutes,foratotalequivalent fireseverityfromfixedandtransient combustibles ofapproximately 20minutes.Afireresulting fromthisquantityoffixedandtransient combustibles couldspreaddownthroughthestairwayopeningintoFireZone29G.However,duetothenaturaltendencyforfiretospreadupwardsandoutwards, thiswouldonlyresultfromaspilloflubricating oildownthestairway.

Thepotential forthistooccurislimitedbythe6-in.highcurbaroundtheper'imeter ofthestairway.

FirewouldthenhavetospreadthroughFireZone29GintoFireZones29Cand29Dthroughtheunratedhatch.Thisscenariowaspreviously addressed andisnotacredibleevent.Page9-157 FireZones29Cand29Dhaveafixedcombustible loadingofapproximately 20,000Btu/ftforanequivalent fireseverityofapproximately 15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare6,842Btu/ftand5.1minutes,respectively.)

Transient combustibles wouldtaketheformoflubricating oilduringchange-out oftheESWpumps.EachESWpumpcontainsfivegallonsoflubeoilforatotaloftengallons.Assumingthattwo5-galcans(ataheatpotential of146,100Btu/gal)arebroughtinformaintenance

purposes, theequivalent fireseveritywouldbeincreased bylessthanfiv'eHowever,thehatchislocatedintheThehighertemperatures associated withsteelhatchupto1000F.floorofFireZone29C.afireineitherFireZone29Cor29Dwouldtendtobenearceilinglevel.Floor-based temperatures shouldbeconsiderably lowerthanthoseatceilinglevel.Thefloorhatchentranceisminutes,foratotalequivalent fireseverityfromfixedand%ttransient combustibles ofunder20minutes.Anequivalent fireseverityofundertenminuteswouldraisethetemperature ofthealsoraisedabovetherestofthefloorbya12in.highcurb.Thiscurbwillpreventspilledcombustible liquidsfromburningdirectlyonthehatchandflowingdownthroughthehatchinFireZone29Gbelow.Automatic detection isprovidedinFireZones29Cand29D.Thiscombination ofdetection, aseverityofunder20minutes,andcurbednequivalent firehatchprovidesreasonable assurance thatafireinvolving fixedand/ortransient combustibles inFireZones29Cand29Dwouldnotadversely impactPage9-158 onthecapability ofthesteelplatehatchtoprotecttheopeninginthebarrier.Postulated FireNo.3Forthethirdpostulated fire,sufficient combustible materialmustbepresentontheroofoftheESWPumpCubiclestoimpactonredundant safeshutdowncapabilities inFireZones29Aand29BandFireZone's29Cand29D.Ignitionofthismaterialeitherindependently orastheresultofafireintheUnit1orUnit2ESWPumpCubiclescouldresultinlossofredundant safeshutdowncapability.

Theroofofthecubiclesisusedfortemporary storageofsignificant amountsofwood,rubberhoses,andthelike.Therefore, thepostulated firesp'reviously addressed inthisevaluation couldspreadupthroughtheundampered HVACsupplyair-openings andignitethematerialontheroof.Ignition'of materialonthe'oof-.in thismanner,orignitionofthematerialindependently, couldresultinfirebeingpulledthroughthesupplyairopeningsintoredundant ESWpumpcubiclessimultaneously.

Assuch,three-hour-rated damperswillbeinstalled intheHVACopeningstotheUnit2ESWPumpCubicles.

ThiswillensurethattheUnit2ESWPumpCubicleswillbeunaffected byafireinvolving transient combustibles ontheroofofthecubicles.

Firecouldspreaddownthroughtheundampered openingsintoFireZones29Aand29B.However,aspreviously demonstrated, afireinFireZones29Aand29BthatspreadsdownintoFireZone29GwillnotresultinafireofPage9-159 sufficient durationthatwillchallenge thesteelplatehatchandspreadupintoFireZones29Cand29D.Postulated FireNo.4Forthefourth.postulated fire,sufficient combustible materialmustbepresentintheScreenhouse, FireZone=142,to-allowfiretospreadbetweentheUnit1andUnit2ESWpumpcubiclesviathescreenmeshaccess.gates.This~ouldinvolvefirespreading alineardistanceofapproximately 175ft.FireZones29Aand29BandFireZones29Cand29Dhavefixedandtransient combustible loadingsofapproximately 20,000.Btu/ft~forequivalent fireseverities ofapproximately 15minutes.(The.,actualcombustible loadingandequivalent fireseverityexistingratthistimeare6,842Btu/ftand5.1minutes,respectively.)

'FireZone142hasafixedcombustible loadingof.approximately

'~."53,000 Btu/ftfor.equivalent fire.severityof40minutes.(The'='actual combustible loadingandequivalent severityexistingatthistimeare25,652Btu/ftand19minutes,respectively.)

Withafloor.areaofapproximately 18,608ft,itwouldtakeatransient combustible loadingof3100lbs.ofwoodat8000IBtu/lb.toresultinatransient fireseverityofoneminute..',Firesoccurring in,orspreading into,FireZone142wouldtendtoriseuptoceilinglevel.FireZone142hasaceilingheightofapproximately 45ft,whilethatoftheESWpumpcubiclesisapproximately 15ft.'asedontheamountofcombustible loadingintheUnit1andUnit2ESWpumpcubiclesandintheScreenhouse, alongwiththe45ftvs.15'tceilingheights'IPage9-160 betweenthetwo,firespreading throughtheScreenhouse to/fromtheESWpumpcubiclesofbothunitsisnotacredibleevent.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireoriginating:

(1)ontheroofofESWPumpHouse;(2)inFireZones29Aand29B;,(3)inFireZone-29G;(4)inFireZones29Cand29D;or(5)inFireZone142,wouldnotimpairsafeshutdowncapabilities ofD.C.CookUnits1and2.Inaddition, thisevaluation doesnotimpactonthebasesofthefullareaandfix'edsuppression exemption requestsintheESWPumpHouseanditdoesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion

-aresummarized asfollows:(1)"Anequivalent fireseverityof5-10minutesisrequiredtoraisethetemperature ofloadcarryingstructural steeluptoitsfailure'oint of1000F.(2)(3)Thesteelplatehatchisnotaloadcarryingstructural component; however,a5-10minutefireseveritycanbeusedtoestablish aconservative baseabovewhichfailurecouldbepostulated withoutadditional fireprotection.

Inordertoimpactonredundant safeshutdowncapability, firewouldhavetospreadeitherthr'oughthehatchseparating FireZones29Cand29DfromFireZone29G,orintotheUnit1andUnit2ESWcubiclesviatheundampered HVACsupplyairopeningsintheceilingofallfour'cubicles, (however, amodification isproposedtoinstallfire-rated dampersintheceilingofFireZones29Cand29D,makingthispathofspreadnotacredibleevent)orthroughthescreenmeshaccessgatesintoFireZones29A,29B,29C,and29D.Thepotential pathsforfirespreadthroughtheseopeningsareasfollows:Page9-161 (a)FromFireZones29Aand29BdownintoFireZone29GandthenupthroughtheunratedhatchintoFireZones29Cand29D;(b)FromFireZones29Aand29BuptotheroofoftheESWPumpHousethroughtheundampered HVACsupplyairopeningsandthendownintoFireZones29Cand29D;(c)FromFireZones29Cand29DdownthroughtheunratedhatchintoFireZone29GandthenupintoFireZones29Aand29B;(d)FromFireZones29Cand29DuptotheroofoftheESWPumpHousethroughtheundampered HVACsupplyairopeningsandthendownintoFireZones29Aand29B;(e)FromtheroofoftheESWPumpHousedownthroughtheundampered HVACsupplyairopeningsintoFj.reZones29Aand29BandFireZones29Cand29Dsimultaneously; (f)FromFireZone29GuptheopenstairwayintoFireZones29Aand29Bandthroughtheunratedhatch.intoFire'ones 29Cand29Dsimultaneously; (g)FromFireZones29Aand29B(orFireZones29Cand29D)outthroughthescreenmeshaccessgateintoFireZone142thenthroughthescreenmeshaccessgateintoFireZones29C..and29D(orFireZones29Aand29B);or(h)IntoFireZones29Aand29BandFireZones29Cand29Dsimultaneously throughthescreenmeshaccessgatesfromFireZone142.(4)FireZone29Ghasanequivalent fireseverityofundertenminutes;over200lbsofwoodorllgallonsoflubricating oilwouldberequiredtoraisethefireseveritybyoneminute.(5)Accessandtransport ofcombustibles intoFireZone29Gisrestricted by.thelockedscreenmeshaccessgatesabove,thestairwayfromFireZone29B,andtheladderfromFireZone29C.Inaddition, the6in.highcurbaroundthestairwayopeningand12in.highcurbaroundthehatchentrancewillpreventflowofspilledcombustible liquidsdownintoFireZone29GfromFireZones29Band29Crespectively.

Page9-162 (6)FireZones29Aand29BandFireZones29Cand29Dhaveanequivalent firesever,ity ofunder15minutes;transient combustibles (lubricating oil)duringmaintenance activities couldraisethefireseveritybyundertenminutes.(7)Duetothelocationofthesteelplatehatch,inthefloor-ofFireZone29C,theonlycrediblefiretoimpactonthehatchisonethatoccursinFireZone29Gbelow.Apostulated fireinFireZone29Gwouldbequicklydetected, resulting infirebrigaderesponse,.

Inaddition, heatbuildingupatceilinglevelinFireZone29GwouldtendtoflowuptheopenstairwaytoFireZones29Aand29B.Reasonable assurance isprovidedthatafireinFireZone29Gwillnotspreadsimultaneously toFireZones29Aand29BandFireZones29Cand29D.(8)(9)Three-hour-rated damperswillbeinstalled intheHVACopeningsintheceilingofFireZones29Cand29D.Automatic detection isprovidedthroughout theESWPumpHouse(inFireZones29A,29B,29C,29Dand29G).(10)Replacing thesteelplatehatchwithoneofratedconstruction wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration andproposedmodification.

(11)ThescreenmeshaccessgatesintoFireZones29Aand29Bandinto.FireZones29Cand29Dareseparated byalineardistanceofapproximately 175ft.Duetothe40minuteequivalent fireseverityinFireZone142,the15minute.equivalent fireseverityinFireZones29Aand29BandFireZones29Cand29D,andthe45-ftceilingheightoftheScreenhouse, reasonable assurance isprovidedthatfirewillnotspreadbetweentheUnit1andUnit2ESWpumpcubiclesviatheScreenhouse.

Page9-163.,

9.26FireArea9andFireArea10BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactofcombining FireAreashutdowncapability.

fireareaboundaries 9withFireArea10onredundant safeThiscombination willreducethenumberofwhichrequiresurveillance.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireArea9istheUnit1Quadrant3NCableTunnellocatedonthe596ftelevation oftheAuxiliary Building.

FireArea10istheQuadrant3MCableTunnelandislocateddirectlysouthof*FireArea9onthe596ftelevation.

'Safe'Shutdown EuimentFireAreas9and10donotcontainsafeshutdowncomponents;

-however,eachareacontainssafeshutdowncables.FireArea10containssafeshutdowncablesforthefollowing Unit1components:

HotShutdownComonents(1)Onetrainofsteamgenerators 1,',3and4levelinstrumentation; (2)Onetrainofauxiliary feedwater supplyvalvesforsteamgenerators 2and3;(3)Onetrainofpressurizer waterlevelinstrumentation; (4)Onetrainof.RCSpressureinstrumentation; (5)Steamgenerators 1and4PORVs;Page9-164 (6)Reactorheadventvalves;(7)Post-accident samplingventvalves;(8)Loops2and3coldlegtemperature instrumentation; (9)Loops2and3hotlegtemperature instrumentation; (10)Onepressurizer PORUblockvalve(poweronly);(ll)Onepressurizer PORU;and(12)Onetrainofletdownisolation valves.ColdShutdownComonents(1)OneRHRinletandoneRHRoutletisolation valves;and(2)Loops1and3safetyinjection accumulators valves.FireArea9containssafeshutdowncablesforthefollowing Unit1components:

HotShutdown(1)Twopressurizer PORUblockvalves(poweronly).ColdShutdown2(1)Ioops2and4safetyinjection accumulator valves;and(2)OneRHRinletiSolation valve.FireProtection EuimentFireArea9andFireArea10arebothprovidedwithautomatic C02suppression systemsandautomatic detection systems.FireHazardsAnalsisInordertomitigatepossiblespuriousoperation, thefollowing valveswillrequiredeenergizing fromtheControlRoomforhotshutdown:

Page9-165 (1)Onereactorheadvent;(2)Onepost-accident samplingventvalve;(3)Onepressurizer PORV;and(4)Steamgenerators 1and4PORVs.Inordertoachievecoldshutdown, thefollowing valveswouldrequiremanualoperation:

(1)TwoRHRinletisolation valves;(2)Loops1,2,3and4safetyinjection accumulator valves;and(3)RHRoutletisolation valve.Baseduponthe'reviously identified modifications andmanualoperatoractions,one'rainofsafeshutdownsystemsandcomponents will.beavailable independent ofcombinedFireAreas9and10.Conclusion Basedontheaboveevaluation, providedthatafireincombinedFirereasonable assurance isIAreas9and10wouldnotimpairthesafeshutdowncapabilities atD.C.CookUnits1or2.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifythisconclusion aresummarized asfollows:Redundant steamgenerator levelinstrumentation existsoutsideFireAreas9and10.Page9-166 (2)Loops1and4hotandcoldlegtemperature indication isunaffected.

(3)Safetyinjection accumulators andRHRinletandoutletisolation valvesarelocatedoutsideFireAreas9and10allowingthevalvestobemanuallyoperated.

(4)'Thecapability todeenergize thefollowing valvestofailinsafepositionisavailable fromtheControlRoom;reactorheadventvalves,steamgenerator PORVs,post-accident samplingventvalvesandpressurizer PORVs.(5)Onetrainofredundant safeshutdownsystemsandcomponents areavailable independent ofFireAreas9and10combined.

(6)Bothfireareasareprovidedwithautomatic C02suppression systems.nPage9-167f 9,.27FireArea24andFireArea25BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactofcombining FireArea24withFireArea25onredundant safeshutdowncapability.

Thiscombination willreducethenumberoff:;ireareabarrierswhichrequiresurveillance.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireArea24istheUnit2Quadrant3MCableTunnellocatedVonthe596ftelevation oftheAuxiliary Building.

FireArea25istheQuadrant-3SCableTunnelandislocateddirectlysouthof~lFireArea24onthe596ftelevation.

SafeShutdownEuiment.,r~FireAreas24and25donotcontainsafeshutdowncomponents; however,eachareacontainssafeshutdowncables.FireArea24containssafeshutdowncablesfor;thefollowing Unit2components:

HotShutdownComonents(1)Twooutoffourtrainsofsteamgenerators 1,2,.3and4level.instrumentation; (2)Onetrainofauxiliary feedwater supplyvalvesforsteamgenerators 1and4;(3)Twooutoffourtrainsinstrumentation; ofpressur'izer waterlevel(4)OnetrainofRCSpressureinstrumentation; Page9-168 (5)Reactorheadventvalves;(6)Post-accident samplingventvalves;(7)Loops2and3coldlegtemperature instrumentation; (8)Loops2and3hotlegtemperature instrumentation; (9)Onepressurizer PORVblockvalve(poweronly);(10)Onepressurizer PORV;(ll)Onetrainofletdownisolation valves;(12)Twooutofthreeofsteamgenerators 1and4pressureinstrumentation; and1(13)Onetrainofsourcerangemonitoring channel.(14)2-LSZ-6XX ColdShutdownComonents(1)OneRHRinletandoneRHRoutletisolation valves;and(2)Loops1and3safetyinjection accumulators valves.Fire,Area25containssafeshutdown, cablesforthe,following Unit2components:

HotShutdown(1)Twopressurizer PORVblockvalves(poweronly).ColdShutdown(.1)Loops2and4safetyinjection accumulator valves;and(2)OneRHRinletisolation valve.FireProtection EuimentFireArea24andFireArea25bothhaveautomatic C02suppression systemsandautomatic detection systems.Page9-169 FireHazardsAnalsisInordertomitigatepossiblespuriousoperation, thefollowing valveswillrequiredeenergizing fromtheControlRoomforhotshutdown:

(1)Onereactorheadvent;(2)Onepost-accident samplingventvalve;and(3)Onepressurizer PORV.Inordertoachievecoldshutdown, thefollowing valveswouldrequiremanualoperation:

(1)TwoRHRinletisolation valves;(2)Loops1,2,'and4.safetyinjection accumulator valves;and"(3)RHRoutletisolation valve.Baseduponthe,previously identified modifications andmanualoperatoractions,.

onetrainofsafeshutdownsystemsandcomponents willbeavailable independent ofcombinedFireAreas24and25.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatafireincombinedFireAreas24and25wouldnotimpairthesafeshutdowncapabilities atD.C.CookUnit2.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption request-contained inthisreport.Thebasesthatjustifythisconclusion aresummarized asfollows:Page9-170 (1)Redundant steamgenerator levelinstrumentation existsoutsideFireAreas24and25.(2)Loops1and4hotandcoldlegtemperature indication isunaffected.

(3)Safetyinjection accumulators andRHRinletandoutletisolation valvesarelocatedoutsideFireAreas24and25allowingthevalvestobemanuallyoperated.

(4)Thecapability todeenergize thefollowing valvestofailinsafepositionisavailable fromtheControlRoom;reactorheadventvalves,post-accident samplingventvalvesandpressurizer PORVs.(5)Onetrainofredundant safeshutdownsystemsandcomponents areavailable independent ofFireAreas24and25combined.

(6)Bothfireareasareprovidedwithautomatic C02suppression systems.Page9-171 9.28FireArea61andFireZone5BoundarEvaluation

~PuruseThepurposeofthisevaluation istoanalyzetheimpactof"combining FireArea61withthefireareacontaining FireZones5,6A,6N,6M,6S,64A,64B,65Aand65Bonredundant safe<shutdown capability.

Thiscombination willreducethenumberoffireareaboundaries whichrequiresurveillance.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZones64A,64B,65Aand65B<<~SafetyInjection PumpRoomsonthearetheUnit1andUnit2587ftelevation intheAuxiliary Building.

FireZones5,6N,6Mand6Saretheeastand'iwestcommonareasofUnits1and2onthe587ftelevation inthe':~Auxiliary Building.

FireZone6Aisapipetunnellocatedonthe'601ftelevation oftheAuxiliary BuildingaboveFireZones5,6N,6M,6S,62A,62B,62C,63A,63Band63C.FireArea61istheSprayAdditiveTankRoomlocatedonthe587ftelevation oftheAuxiliary Buildingadjacentto'FireZone5.FireZones62A,62B,and62CareUnit1chargingpumpcubiclesandFireZones63A,63B,and63CareUnit2chargingpumpcubicleslocatedon587ftelevation ofAuxiliary BuildingadjacenttoFireZone5.SafeShutdownEuimentFireArea61doesnotcontainsafeshutdowncomponents orcables.FireZones5,6A,6N,6M,6S,64A,64B,65Aand65BPage9-172 containsafeshutdowncablesand/orcomponents forbothUnits1and2.FireProtection EuimentFiredetect.ion systemsareinstalled throughout FireZones5,6N,6M,6S,64A,64B,65A,65BandFireArea61.Automatic suppression isprovidedinFireZones.5,6N,6M,6S,64A,64B,65Aand65BbutnotinFireArea61.Manualsuppression capabilities intheformofportableextinguishers andhosestationsareavailable foruseinbothfireareas.FireHazardsAnalsisFireArea61isseparated fromFireZone5byreinforced concretewalls.FireArea.61hasafixedcombustible loading.ofunder27,000Btu/ft,whichcorresponds, toanequivalent fireseverityof20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare13,846and10.4minutes,respectively.)

Automatic detection isprovidedinFireArea61,whichwillprovideearlywarningandpromptmanualfirefightingactivities.

IfafirewastostartinFireArea61,reasonable assurance isprovidedthatthefirewouldbecontained andburnoutbeforeitspreadstoFireZone,5.Thiscanbeaccredited tothefireseverityoflessthan20minutesandtheexistence ofconcretewalls.IfthefirewastospreadfromFireArea61toFireZone5,theautomatic detection andsuppression systemsinFireZone5wouldactuateandcontroland/orextinguish thefirebeforeitcoulddamagethesafeshutdowncablesinFireZone5.Page9-173 FireZone5,whichisadjacenttoFireArea61,hasacombustible loadingofunder27,000Btu/ftforanequivalent

-fireseverityof20minutes(theactualcombustible loadingandequivalent fireseverityexistingatthistimeare11,229Btu/ftand8.5minutes,respectively);

however,FireZone5isprovided"withanautomatic detection systemandanautomatic preaction sprinkler system.SinceFireArea61doesnotcontainsafeshutdowncablesorcomponents, combining itwiththefireareacontaining FireZones5,6A,6N,6S,6M,64A,64B,65Aand65Bwillnotimpactsafeshutdowncapability.

Thecompliance strategyforthesezoneswillbethesameasidentified inthe1983AppendixRsubmittal.

Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatcombining FireArea61withFireZones5,6A,6N,6M,6S,64A,64B,65A,and65Bwillnotimpairthesafeshutdowncapabilities ofD.C.CookUnits1and2.Thebasesthatjustifytheconclusion aresummarized asfollows:FireArea61hasanequivalent fireseverityoflessthan20minutes.(2)(3)FireArea61system.FireArea61isseparated withreinforced.

concretewallsthatwilllimitfirespreadtoFireZone5.isprovidedwithanautomatic detection Page9-174 (4)FireArea61doesno'tcontainsafeshutdowncomponents orcables;therefore, combining FireArea61withfireareacontaining FireZones5,6A,6N,6M,6S,64A,64B,65Aand65Bwillnotaddanysafeshutdowncablesorcomponents.

i(5)Manualfiresuppression systemsareavailable forbothfireareas.(6)IfafireshouldspreadfromFireArea61toFireZone5,theautomatic detection andtheautomatic preaction sprinkler suppression systemswouldcontroland/orextinguish thefirebeforeitcoulddamagethesafeshutdown"cables andcomponents inFireZone5.Page9-175 9.29FireArea105andFireAreas33,33A,33BBoundarEvaluation

~PuroeeThepurposeofthisanalysisistoanalyzetheimpactofcombining FireArea105withthefireareacontaining FireZones33,33A,33Bonsafeshutdowncapability.

Thiscombination willreducethenumberoffireareaboundaries whichrequiresurveillance.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireArea'105.-is'heUnit1Contractor AccessControlBuildinglocated*on the612ftelevation directlynorthofFireZone33A.FireZone33AistheUnit1EastMainSteamLineAreaI'ocatedonthe612'televation oftheAuxiliary Building.

FireZone33BistheUnit1Nonessential ServiceWaterValveArealocatedsouthwest ofFireZone33Aonthe612ftelevation oftheAuxiliary Building.

FireZone33istheUnit1EastMainSteamValveEnclosure locatedsoutheast ofFireZone33Aonthe612ftelevation oftheAuxiliary Building.

SafeShutdownEuimentFireArea105doesnotcontainsafeshutdowncomponents orcables.Thefireareacontaining FireZones33,33A,33Bcontainsthefollowing safeshutdowncomponents:

Unit1steamgenerators 1and4PORVs,auxiliary feedwater supplyvalves,Page9-176 steamgenerators 1and4mainsteamstopvalves(MSSVs),steamgenerators 1and4pressuretransmitters, andUnit1LocalShutdownIndication panelsLSI-1andLSI-5.FireZones33,33A,and33Balsocontainsafeshutdowncablesfortheabove-mentioned safeshutdowncomponents.

FireProtection EuimentFireArea105isprovidedwithanautomatic wetpipesprinkler system.Detection systemisprovidedforFireZones33,33A,and33B.ManualdelugewaterspraysystemisprovidedforthecharcoalfilterunitslocatedinFireZone33A.FireHazardsAnalsisSinceFireArea105doesnotcontainsafeshutdowncablesorcomponents, combining itwiththefireareacontaining FireZones33,33Aand33B,will.notaffectsafeshutdown.

Thesafeshutdowncompliance strategyforbothoftheseareaswillbethesameaspreviously identified in.the1983AppendixRsubmittal wheresafeshutdownisachievable independent ofbothfireareas.FireZones33Aand33B,whicharepartofFireArea33,33Aand33B,wereaddressed intheseismicgapexemption request(see.Section7.14).Theexemption requestconcluded thatafirestartingfromFireZone33Bmaypropagate throughtheseismicgaptoFireZones33A,.38,and108.Thebasesforthisjustification isstillacceptable ifFireArea105iscombinedwithFireZones33,33Aand33Bforthe.following reasons:Page9-177 (1)FireArea105doesnotcommunicate directlywithFireZone33B.Itonlycommunicates withFireZone33A.(2)Thecombustibles inFireArea105areseparated fromFireZone33Abyunratedgypsumwallswithunsealedpenetrations andunratedaccessdoors.(3)Afirepropagating throughtheseismicgapbetweenFireZones33B,38,and108wouldbelimitedasstatedintheseismicgapevaluation because-ofthelowcombustible loadingneartheseismicgapand/orpresenceofdetection andsuppression systems.(4.)Redundant safeshutdownsystemsandcomponents areindependent ofFireZones33A,33B,38and108asstatedinthepreviousseismicgapevaluation.

FireZone33,whichispartofFireArea33,33A,and33B,wasalsopartofaboundaryevaluation involving FireArea116(seeSection9.23).FireArea116isapipetunnelin.excessof250ftconnecting FireZone33andFireArea12.Aspreviously statedinthisanalysis(Section9.23),ifafireweretopropagate throughFireZone33'ti12,safeshutdownwouldnotbenotadjacenttoFireZone33components orcables,itwillforthisevaluation.

andFireArea116andFireAreaaffected.

SinceFireArea105isanddoesnotcontainsafeshutdownnotjeopardize thejustifications

'ZheFireArea33,33A,33Bexemption requestaskedforanexemption fromthe'requirement forafixedsuppression systeminstalled intheareaswherealternate shutdowncapability existasrequiredbyIII.G.3ofAppendixR(seeSection7.8).Thejustifications forthisexemption aresummarized asfollows:PPage9-178 (1)Affectedcomponents inthefireareahavealternate shutdowncapability.

(2)Thecomponents ofconcernarehorizontally separated bygreaterthan100ft.(3)Thecombustib/e loadinginthefireareaisunder27,000Btu/ftwithanequivalent fireseverityofapproximately 20minutes.(Theactualcombustible loadingandequivalen[

fireseverityexistingatthistimeare9,530Btu/ftand7minutes,respectively.)

(4)Themodifications requiredtomeetSectionIII.G.3wouldnotsignificantly enhancefireprotection safetyabovethatprovidedbypresentcommitments.

FireArea105hasacombustible loadingofunder33,000Btu/ftwhichcorresponds toafireseverityof25minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare15f619and11.7minutes,respectively.)

HHowever,,

FireArea105isprovidedwithanautomatic wetpipesprinkler system.IfafireweretostartinFireArea105,itwouldbe1extinguished beforeitcouldspreadtoFireZone.33B.

Therefore theexemption requestforFireArea33,33A,33Bisunaffected bycombining FireArea105withFireArea33,33A,33B.Conclusion Basedontheaboveevaluation, reasonable assurance isprovidedthatcombining FireArea105withthefireareathatcontainsFireZones33,33Aand33Bwillnotimpairthesafeshutdowncapabilities ofD.C.CookUnits1and2.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Page9-179 The.basesthatjustifytheconclusions aresummarized asfollows:FireArea105isseparated fromFireZone33Abyunratedgypsumwallswithunsealedpenetrations andunratedaccessdoors.(2)FireZone105doesnotcontainsafeshutdowncomponents orcables.(3)FireArea105willnotaffectthejustifications fortheseismicgapevaluation becauseofdistancefromseismicgap,thewallseparating itfromFireZone33Aandexclusion ofsafeshutdowncablesorcomponents.

(4)FireArea105willnotaffectthejustification fortheFireZone116boundaryevaluation becauseFireArea105doesnotcontainsafeshutdowncomponents orcables,andisnotadjacenttoFireZone33.(5)FireArea105isprovidedwithanautomatic wetpipesprinkler system.Page9-180 9.30FireZones3,32,36,48,49,50,51,52,69andFareAreas106,107,31,35,146BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactof'ombining thefireareacontaining FireZones3,32,36,48,49,50,51,52,and69withFireAreas106,107,31,35,and146onredundant safeshutdowncapability.

Thiscombination willreducethenumberoffireareaboundaries thatrequiresurveillance andwillnotadversely impactonotherrequestscontained inthisreport.evaluations orexemption FireZone/Area 332364849505152691061073135146*Drumming/Storage AreaCaskHandlingAreaSpentFuelPitPumpRoomNewFuelStorageRoomUnit1HVACVestibule Unit2HVACVestibule EastEndAuxiliary BuildingWestEndAuxiliary BuildingAuxiliary BuildingUnit1Aux.Feedwater BatteryUnit2Aux.Feedwater BatteryConcreteMixingBuildingInstrument Calibration RoomLoadingPlatformAreaElev.(ft)589609609633633633633650Room633Room633609609609*TheLoadingPlatformareawasnotpreviously identified asafirezoneinthe1983AppendixRsubmittal.

SafeShutdownEuimentThefireareadefinedbyFireZones3,32,36,48,49,50,51,52and69containssafeshutdownequipment, whichislocatedPage9-181 inFireZones50,52and69.Thisequipment includes1-CMO-429, 2-CMO-429 (CCWtoRHRheatexchanger isolation MOV),1-CCW-214,

,1-CCW-220, 2-CCW-214, 2-CCW-220 (CCWsurgetankmanualisolation Ivalves),MCCs1-AM-A,2-AM-A,1-AM-D,2-AM-Dandbatterydistribution cabinetDCN(Unit1andUnit2).Variouscablesare,routedinFireZones32,50,51,52and69ofthisfirearea.Basedonthesafeshutdownsystemanalysis, intheeventofafireinthisfirearea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoring instrumentation.

However,theMarch1983submittal recommended theadditionofanalternate sourcerangeneutron,monitoring channeltoprovideindication atlocalshutdownpanelLSI-4locatedinFireZone5.FireAreas31,35and146containnosafeshutdownequipment

,and/orcables.FireAreas106and107containBNbatteries andassociated cables.Theassociated cablesofUnit1BNbattery,whichislocatedinFireArea106,areroutedtoFireZone52.4~1Theassociated cablesofUnit2BNbattery,whichislocatedinFireArea107,areroutedtoFireZone50.Page9-182 FireProtection EuimentFireAreas106and107areeachprovidedwithanautomatic heatdetector.

Automatic detection orsuppression capability isnotprovidedinFireAreas31,35,106,107,and146.FireZones32,48,and69areprovidedwithionization smokedetectors andpartialdetection coverageisprovidedinFireZone3.Drypilotpreaction suppression systemsareprovidedinFireZone32andpartialcoverageisprovidedinFireZone3.Inaddition, FireZone69isprovidedwithanautomatic thermistor detection systemandmanualdelugesystemfortheHVACcharcoalfilterunits.FireZone49,50,51;and52areprovidedwithautomatic fireprotection

features, specifically areaionization smokedetection andeachcha'rcoal filterunitisprovidedwithamanualdelugesystemwith.anautomatic thermistor detection system.Anautomatic drypilotpreaction suppression systemisprovidedinthenormallyaccessible areaofFireZones51and52.FireHazardsAnalsisThesafeshutdowncompliance methodforthecombinedfireareaswillnotchangefromthatidentified inthe1983AppendixRsubmittal forthefireareacontaining FireZones3,31,32,35,36,48,49,50,51,52,69,106,107and146sincethesafeshutdowncablesinFireAreas106and107,alsoarecontained inFireZones50and52.Page9-183 Conc'lusion IBasedontheresultsofthepreviousevaluation, FireAreas'31,35,106,107,and146canbecombinedwithFireZones3,32,.'36,48,49,50,51,52,and69toformalargerfirearea.This"-'evaluation doesnotadversely impactonotherevaluations or<exemption requestscontained inthisreport.Thebasisforthisconclusion isthatonlyFireAreas106and107containsafeshutdowncablesandthesecablesarealsolocatedinFireZone52.Page9-184 9.31BoundarEvaluation ofFireZones62A,62Band62C~PuroseThepurposeofthisevaluation istoanalyzetheimpactofsteelplatecoveredaccessopeningstoverticalchases/leakage detection boxesinFireZones62A,62B,and62CthatconnecttheRHRandcontainment spraypumps,belowwiththeirheat-exchangers aboveon(1)redundant safeshutdowncapability and(2)thefullareasuppression exemption requestforthe573ftelevation oftheAuxiliary Building.

Inaddition;

.thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.DescritioneThecontainment sprayandRHRpumps.,'are-located onthe573ftelevation oftheAuxiliary BuildinginFireZones1A,1B,1Cand1D.Theheatexchangers

-associated withthesepumpsarelocatedon609ftelevation inFireZones44A,44B,44Cand44D.Thepipingbetweeneachpumpanditsheatexchanger passesthroughFireZones62A,-62B,and62Conthe587ftelevation.

Thepipingforeachpump/heat exchanger isenclosedwithinaseparateconcretechase.OnechaseexistsinFireZone62A,twoinFireZone62B,andoneinFireZone62C.Asteelplatecovernormallyboltedontoonefaceofeachchaseprovidesaccessintothechaseforleakagedetection purposes.

Thetopandbottomofeachchaseisnotsealed.Page9-185 SafeShutdownEuimentFireZoneslAandlBcontaintheUnit1containment spraypumpswiththeirassociated heatexchanges locatedinFireZones44Aand44B.This-equipments isnotrequiredforsafeshutdownpurposes.

FireZones1Cand1DcontaintheUnit1RHRpumpswiththeirassociated heatexchangers locatedinFireZones44Cand44D.Theyarerequiredforcoldshutdownpurposesonly.TheadequacyofRHRpumpseparation andmanualoperations ofvalvesintheheatexchanger cubicleswereaddressed intheMarch1983App'endix R"'submittal.

FireZones62A,62Band62CcontaintheUnit1Gharging'umps.:."

Given'-fire'hatinvolvesthesefirezones,c'omplete alternate

shutdown, capability is"provided outsideoftheareausing.Unit,2equipment..

F'ireProtection EuimentAutomatic ionization detection systemsareinstalled inFireZones1A,lB,1Cand1DandinFireZones62A,62Band62C.Apreaction sprinkler systemisinstalled inFireArea62A,62Band62C.Automatic detection andsuppression capabilities arenotprovidedinFireZones44A,44B,44Cand44D.Manualsuppression capabilities.

in.the.formofportableextinguishers andmanualhosestationsareavailable foruseinalllocations.

FireHazardsAnalsisThefixedandtransient combustible loadinginFireZoneslA,1B,1Cand1Disunder20,000Btu/ftforanequivalent fire2Page9-186 severityofunder15minutes.(Theactualfixedcombustible loadingexistingatthistimeislessthan6,242Btu/ftforanequivalent fireseverityofunderfiveminutes.)

Thefixedcombustible loadinginFireZones62A,62Band62Cis47,-000Btu/ftforanequivalent fir'eseverityofunder35minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare32,538Btu/ftandunder25minutes,respectively.)

Theautomatic detection andpreaction sprinkler

'Isystemsinthesezoneswillacttolimittheimpactoftransient combustibles, providedthatthey.,arenotofsuchaquantitytooverwhelm thesuppression system.Thefixedandtransient combustible loadinginFireZones44A,44B,44Cand.44Disunder;20,000Btu/ftforan"equivalent fire-severityof15minutes;-'The actualfixedcombustible loadingexistingat.thistimeis5573forequivalent fireseverityoffourminutes.)

573ftElevation TheRHRpumpsand,heatexchangers arerequiredsolelyforcoldshutdownpurposes.

TheMarch1983AppendixRsubmittal demonstrated thatafireoccurring onthe573ftelevation oftheAuxiliary Buildingwouldnotimpactonredundant safeshutdown, capability oftheRHRpumps.Therefore,,

theonlypotential impactforfireonthe573ftelevation wouldbeforfirespread-upintothechargingpumpcubiclesand/ortheRHRheatexchanger cubicles.

Page9-187 Basedonafixedand,transient combustible loadingof20,0002hBtu/ftforanequivalent fireseverityof15minutes,thesteelplatecoverswouldhavetoberemovedfromtheverticalchases/leakage.detection boxesinordertoimpactonth'echargingpumpsinFireZones62A,62Band62C.Shouldfireenterthechargingpumpcubicles,

'heexisting'preaction sprinkler systemwouldacttomitigatefirespreadinthecubicles.

1naddition, completealternate shutdowncapability isavailable forafirethatspreadsintotheUnit1chargingpumpcubiclesfromtheUnit1;.RHRorcontainment spraypump.cubiclesbelow.'hould'f'i:re spreaduptheleakdetection

..=boxesfromtheRHRpumpcubiclestoto...the RHR.heatexchanger

cubicles, sufficient timeexi'stsformanually, operating*

any~required.valvesin'the*heatexchanger cubiclestoachievecold'shutdown conditions.

'-Assuch,"fireontahe573ft-elevation of,the,'Auxiliary Buildingwill'otadversely impactonredundant hotorcoldsafeshutdowncapabil'ity.

587ftElevation TheMarch1983AppendixRsubmittal demonstrated thatafireoccurring inFireZones62A,62Band62Cwouldnotimpactonredundant safeshutdowncapability astheUnit2chargingpump'sinFireZones63K,63Band63Cwouldstillbeavailable.

Therefore, theonlypotential impactforfireinFireZones62A,62Band62Cwouldbeforfiretospreaddownthroughtheverticalchase/leakage detection boxesintoredundant RHRpumpcubiclessimultaneously, orupintotheRHRpumpheatexchanger cubiclessimultaneously.

Page9-188 Theprobability ofafirespreading downintotheRHRpumpcubiclesisnegligible.

Thisis,basedon.thenaturaltendencyforfiretospreadupwardsandoutwards.

Whileoilf.ires,could spreadtothelevelbelow,sixin.high,curbsatthe587-ftfloorelevation ofeachvertical,chase/leakage detection-box openingwillpreventthisfromoccurring.

Thepotential doesexistforanuncontrolled fireinvolving 46,655Btu/ftofcombustible loadinginFireZones62A,62Band62CtospreadupwardsintotheRHRpumpheatexchanger cubicles.

However,theautomatic detection andpreaction sprinklers inthechargingpumpcubicleswillacttocontrolpostulated.

f.iresuntilthefirebrigadearrivestocompleteextinguishment.

Postulated, heat,andsmokeespreadupthe"verticalchases/leak" detection "boxes'ill,"therefore, bekepttoaminimum.Detrimental impact~-on redundant hotorcoldsafeshutdowncapability

-is,-,therefore,',

not;postulated.

609ftElevation TheMarch1983Append'ix Rsubmittal demonstrated thatafireinoneheatexchanger cubicleonthe609ftelevation oftheAuxiliary Buildingwouldnotimpactonredundant safeshutdown>>

capability onthiselevation ortheelevation above.Theonlypotential impactforfireintheheatexchanger cubiclesisfor,firetospreaddownintothechargingpumpcubiclesbelow.Thefixedandtransient combustible loadingsinthecubiclesareunder20,000Btu/ft.Oilisnotrequiredintheseareasfor2Page9-189 maintenance purposes.

Assuch,theonlypostulated transient combustibles areordinarycombustibles.

Therefore, thepotential forfiretospreaddowntheverticalchases/leakage detection boxesintothe,chargingpumpcubiclesisnotconsidered acredibleevent.Conclusions Basedonthe"aboveeva'luation, reasonable assurance isprovidedthatafireinthevicinityoftheverticalchases/leakage detection boxespassingthroughFireZones62A,62Band62Cwouldnotimpairsafeshutdowncapabilities ofD.C.Cookorimpactonthefullareasuppression exemption requestfort'e573'ftelevation

-of'heAuxiliary Building.

Inaddition, thisevaluation doesnotadversely.

impactonotherevaluations orexemption.

requestscontained.

in'hisreport.Thebasesthatjustifytheconclusion aresummarized asfollows:(1)Thecontainment sprayandRHRpump.cubicles (FireZoneslA,1B,1CandlD)onthe573ftelevation havefixedandtransient combustible loadingsofunder20,000Btu/ft.(Theactualfixedcombustible loadingexistingatthistimeisunder6,242Btu/ft~).

(2)Thecontainment sprayandRHRheatexchanger cubicles(FireZones44A,44B,44Cand44D)onthe609fte'levation havefixeda~dtransient combustible loadingsofunder20,000Btu/ft(3)Thechargingpumpcubicles(FireZones62A,62Band62C)onthe587ftelevation haveafixedcombustible loadingofunder47,000Btu/ftPage9-190 (4)Theautomatic detection systemsinthecontainment sprayandRHRpumpcubicleswill,resultinpromptdetection ofincipient fireconditions, withresultant responseofthefirebrigade.I(5)Theautomatic detection andpreaction sprinkler systemsinthechargingpumpcubicles'willact.tocontrol'nd/orextinguish postulated firespriortothearrivalofthefirebrigade.(6)Thesixin.highcurbsat'he587-ftfloorelevation oftheaccessopeningsintoeachverticalchase/leakage detection boxwillpreventfirespreaddowntothecontainment sprayandRHRpumpcubiclesbelow.TheRHRpumpsandheatexchangers arerequiredforcoldshutdownpurposesonly,withRHRpumppowercablerepairsandmanualoperation ofvalvesintheheatexchanger.,

cubiclesaddressed intheMarch1983AppendixRsubmittal, Section6.(8)Givenfirespreadtoororiginating inthechargingpumpcubicle's, complete,alternate shutdowncapability, isavailable usingUnit2chargingpumpequipment.

(9)Protecting theboltedonsteelplatecovers,orpostingfirewatcheswhenremoved,would,not-significantly enhancetheprotection

-providedbytheexistingconfiguration.

Page9-191 9.32BoundarEvaluation ofFireZones63A,63Band63C~PuruseThepurposeofthisevaluation istoanalyzetheimpactofsteelplatecoveredaccessopeningstoverticalchases/leakage detection boxesinFireZones63A,638and63CthatconnecttheRHRandcontainment spraypumpsbelowwiththeirheatexchangers "aboveon(1)redundant safeshutdowncapability and(2)thefullareasuppression exemption requestforthe573ftelevation oftheAuxiliary Building.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained in-thisreport.Thecontainment sprayandRHRpumpsarelocated-onthe573ftelevation of'theAuxiliary

-'Building inFireZoneslE,1F,1Gand'H.Theheat'xchangers associated withthesepumpsarelocatedon609ftelevation inFireZones44E,44F,44Gand44H.Thepipingbetweeneachpumpandits.heat..exchanger passesthroughFireZon'es63A,63Band63Conthe587ftelevation.

Thepipingforeachpump/heat exchanger isenclosedwithinaseparateconcretechase.OnechaseexistsinFireZone63A,twoinFireZone63B,andoneinFireZone63C.Asteelplatecover.normallyboltedontoonefaceofeachchaseprovidesaccessintothechaseforleakagedetection purposes.

Thetopandbottomofeachchaseisnotsealed.Page9-192 SafeShutdownEuimentFireZones1EandlFcontaintheUnit1containment spraypumpswiththeirassociated heatexchanges locatedinFireZones44Eand44F.Thisequipment isnotrequiredforsafeshutdownpurposes.

FireZones1Gand1Hcontainthe,Un,it 1RHRpumpswith.theirassociated heatexchangers locatedinFireZones44Gand44H.Theyarerequiredforcoldshutdownpurposesonly.TheadequacyofRHRpumpseparation andmanualoperations ofvalvesintheheatexchanger cubicleswereaddressed intheMarch1983AppendixRsubmittal.

FireZones63A,63Band63CcontaintheUnit2chargingpumps.Givenafirethatinvolvesthesefirezones,completealternate shutdowncapability isprovidedoutsideoftheareausingUnit1equipment.

FireProtection EuimentAutomatic ionization detection systemsareinstalled inFireZoneslE,1F,lGand1HandinFireZones63A,63Band63C.Apreaction sprinkler systemisinstalled inFireZones63A,63Band63C.Automatic detection andsuppression capabilities are.notprovidedinFireZones44E,44F,44Gand44H.Manualsuppression capabilities intheformofportableextinguishers andmanualhosestationsareavailable foruseinalllocations.

FireHazardsAnalsisThefixedandtransient combustible loadinginFireZoneslE,1F,1Gand1Hisunder20,000Btu/ftforanequivalent firePage9-193A "severity ofunder15minutes.(Theactualfixedcombustible

."loading existingatthistimeislessthan6063Btu/ftforan(equivalent fireseverityof4.5minutes.)

Thefixedcombustible

,loading inFireZones63A,63Band63Cislessthan47,000~<Btu/ftforanequivalent fireseverityofunder35minutes.p(Theactualcombustible loadingandequivalent fireseverity<existing atthistimeare32,217Btu/ftand24minutes,respectively.)

Theautomatic detection andpreact,ion sprinkler systemsinthesezoneswillacttolimittheimpactoftransient combustibles, providedthattheyarenotof.,sucha,quantity to~overwhelm thesuppression system.Thefixedandtransient

>>combustible loadinginFireZones44E,44F,44Gand44Hisunder,<20,000Btu/ftforanequivalent fireseverityof15minutes.,(Theactualfixedcombustible

,loadingexistingatthistimeis,<.7,645Btu/ftforequivalent fireseverity5.7minutes.)

.573ftElevation TheRHRpumpsandheatexchangers arerequiredsolelyforcoldshutdownpurposes.

TheMarch1983AppendixRsubmittal demonstrated thatafireoccurring onthe573ftelevation oftheAuxiliary Buildingwouldcapability oftheRHRpumps.Therefore, theonlypotential notimpactonredundant safeshutdownimpactforfireonthe573ftelevation wbuldbeforfirespreadup.intothechargingpumpcubiclesand/ortheRHRheatexchanger cubicles.

Page9-194 Basedonafixedandtransient combustible loadingofunder20,OOQBtu/ftforanequivalent fireseverityof15minutes,thesteelplatecoverswouldhavetoberemovedfromtheverticalchases/leakage detection boxesinordertoimpactonthechargingpumpsinFireZones63A,63Band63C.Shouldfireenterthechargingpumpcubicles,

.theexistingpreaction sprinkler systemwou]dacttomitigatefirespreadinthecubicles.

Inaddition; completealternate shutdowncapabili'ty isavailable forafirethatspreadsintotheUnit2chargingpumpcubiclesfromtheUnit2RHRorcontainment spraypumpcubiclesbelow.Shouldfirespreaduptheleakdetection boxesfromtheRHRpumpcubiclesintotheRHRheatexchanger

cubicles, sufficient, timeexistsformanuallyoperating any,requiredvalves;inthe,heatexchanger ncubiclestoachievecoldshutdown'onditions.,,

Assuch,'ire onthe573ftelevation

.ofthe-Auxiliary Buildingwillnotadversely impactonredundant hotorcoldsafeshutdowncapability.'87 ftElevation TheMarch1983AppendixRsubmittal demonstrated thatafireoccurring inFireZones63A,63Band63Cwouldnotimpactonredundant safeshutdowncapability astheUnit1chargingpumpsinFireZones62A,62Band62Cwouldstillbeavailable.

Therefore, theonlypotential impactforfireinFireZones63A,63Band63Cwouldbeforfiretospreaddownthroughtheverticalchase/leakage detection boxesintoredundant RHRpumpcubiclessimultaneously, orupintotheRHRpumpheatexchanger cubiclessimultaneous ly.Page9-195 forfiretospreadupwardsandoutwards.

Whileoilfirescouldspreadtothelevelbelow,sixin.highcurbs.atthe587-ftfloorelevation ofeachverticalchase/leakage detection boxopeningThepotential doesexistforssthan47,000Btu/ftofwillpreventthisfromoccurring.-

anuncontrolled fireinvolving lecombustible loadinginFire'ones 63A,63Band63CtospreadupwardsintotheRHRpumpheatexchanger cubicles.

However,theautomatic detection andpreaction sprinklers i>"the'"ch'a'rging"pump cubicleswillacttocontrolpostulated firesuntilthefirebrigadearrives,to,complete.,extinguishment.

Postulated heatandsmoke'spread up=,thevertical',

chases/leak detection boxeswill,therefore,.

bekeptto;a'inimum.='etrimental impactonredundant hotor.coldunsafe-."

shutdown"capability

'-is,therefore, notTheprobability ofafirespreading downintotheRHRpumpcubiclesisnegligible.

Thisisbasedonthenaturaltendencypostulated.

609ftElevation TheMarch1983AppendixRsubmittal demonstrated that,afireinoneheatexchanger cubicleonthe609ftelevation oftheAuxiliary Buildingwouldnotimpactonredundant safeshutdowncapability onthiselevation ortheelevation above.Theonlypotential impactforfireintheheatexchanger cubiclesisforfiretospreaddownintothechargingpumpcubiclesbelow.Thefixedandtransient combustible loadingsinthecubiclesareunder20,000Btu/ftwithfixedcombustible loading.OilisnotPage9-196 requiredintheseareasformaintenance purposes.

Assuch,theonlypostulated transient combustibles areordinarycombustibles

~Therefore, thepotential forfiretospreaddowntheverticalchases/leakage detection boxesintothechargingpumpcubiclesisnotconsidered acredibleevent.Conclusions

'asedontheaboveevaluation, reasonable assurance isprovidedthatafireinthevicinityoftheverticalchases/leakage detection boxespassingthroughFireZones63A,63Band63Cwould.

not,impair'safeshutdowncapabilities ofD.C.Cookorimpactonthefullareasuppression exemption requestforthe573ftelevation oftheAuxiliary Building.

  • .In.addition;<

thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebasesthatjustifytheconclusion, are'summarized as'ollows:

(1)Thecontainment sprayandRHRpumpcubicles(FireZoneslE,1F,1G-and1H)onthe573ftelevation havefixedandtransient

,combustible loadingsofunder20,000Btu/ft.(Theactualfixedcombust',ble loadingexistingatthistimeisunder6063Btu/ft~).

(2)Thecontainment sprayandRHRheatexchanger cubicles'<

(FireZones44E,44F,44Gand44H)onthe609ftelevation havefixeda~dtransient combustible loadingsofunder20,000Btu/ft.(Theactualfixedcombustible loadingexistingatthistimeis7645Btu/ft~.)

(3)Thechargingpumpcubicles(FireZones63A,63Band63C)onthe587ftelevation haveafixedcombustible loadingofunder47,000Btu/ftPage9-197 (4)Theautomatic detection systemsinthecontainment sprayandRHRpumpcubicleswillresultinpromptdetection ofincipient fireconditions, withresultant responseofthefirebrigade.(5)Theautomatic detection andpreaction sprinkler systemsinthechargingpumpcubicleswillacttocontroland/orextinguish postulated firespriortothearrivalofthefirebrigade.(6)Thesixin.highcurbsatthe587-ftflooroftheaccessopeningsintoeachverticalchase/leakage detection boxwillpreventfirespreaddowntothecontainment sprayandRHRpumpcubiclesbelow.(7)TheRHRpumpsandheatexchangers arerequiredforcoldshutdownpurposesonly,withRHRpumppowercablerepairsandmanualoperation ofvalvesintheheatexchanger cubiclesaddressed intheMarch1983AppendixRsubmittal, Section6.(8)Givenfirespreadtoororiginating inthechargingpumpcubicles, completealternate shutdowncapability isavailable usingUnit1charging'ump equipment.

(9)Protecting theboltedonsteelplatecovers,orpostingfirewatcheswhen'emoved,wouldnotsignificantly enhancetheprotection providedbytheexistingconfiguration.'age 9-198 9.33FireZone6AtoFireZone138BBoundarEvaluation

~~'~PuroseThepurposeofthisevaluation istoanalyzetheimpactofavertical shaftconnecting.

FireZone6A(the601ft.PipeTunnel)andFireZone138B(CVCSHoldUpYankRoomB)onredundant safeshutdowncapability.

Inaddition, thisevaluation doesnotimpactonotherevaluations orexemption requestscontained inthisreport.DescritionFireZone6A,is.locatedonthe601ftelevation oftheAuxiliary Building.

ItispartofalargerfireareathatincludesFireZones5,.6N,6M,6S,,61,,6'4A,.64B,,65A, and65B:Fire,Zone138Bis~~~~Auxiliary Building.

locatedon'he562ftelevation

'ftheIt.is,partofalargerfireareathat*includesFireZones'1,1Athrough1H,136,137,138A,'and138C.A"concreteshaftconnectsthetwozonesoftheidentified fireareas.Theshaftoriginates inFireZone6Aviaagratelocatedinthefloorofthezoneatapproximately columnlineHandthecenterline oftheplant.Thisisthehighest'pointoftheshaft.Theshaftpassesvertically throughFire'Zone6Mandistotallyenclosedinthiszone.Theshaftpenetrates throughthefloorofFireZone6Matthe587ftelevation andterminates atceilinglevelwithinFireZone138B.AnopeningatceilinglevelinFireZone138B,atapproximately the585ftelevation, isthelowestpointof,theshaft.Page9-199 SafeShutdownEuimentNeitherFireZone6AnorFireZone138Bcontainequipment orcablesrequiredforsafeshutdownpurposes.

FireProtection EuimentNeitherFireZone6AnorFireZone138Bareprovidedwithautomatic detection

-orsuppression.

FireHazardsAnalsis'ireZone6AandFireZone138Bhavecombustible loadingsofunder13,000Btu/ftforequivalent fireseverities oflessthan10minutes.(Theactualfixedcombustible loadingexistingatthistimeisnegligible.)

Bothzonesarehighradiation areas*sthatdonotprovideaccesstootherplantareas.Therefore, thepotential

'for'torage oftransient combustible materials inlf~~~eitherlocation.

isconsidered negligible.

Neitherzone.containseither,safeshutdownequipment orsignificant quantities of'combustible materials.

Therefore, themainwayinwhichtheshaftcouldresultina.detrimental impactonsafeshutdowncapability wouldbeforittochannelfirebetweenvariouslevelsoftheAuxiliary Building.

Basedonthis,firewouldhavetooriginate onthe573ftelevation oftheAuxiliary

Building, penetrate intotheCVCSHoldUpTankareaandthenspreadup'theshaftfromFireZone138BintoFireZone6A.FromFireZone6A,firewouldthenhavetospreadoutintoeitherFireZones6Nor6Sonthe587ftelevation, orspreadoutintoFireZones44Nand44Sonthe609ftelevation.

Page9-200 (Notethatexemption requestSection.7.13ofthisreportaddresses undampered ventilation ductworkthatpassesthroughmultiplelevelsoftheAuxiliary Building.

Itwasdemonstrated inthisexemption requestthatfirecouldinvolveFireZone.l.onthe573ftelevation, FireZone6Nonthe587ftelevation, andFireZone44Nonthe609ftelevation withoutimpacting onredundant safeshutdowncapability.

Therefore, firespreading uptheshaftwouldhavetoinvolvebothFireZones6Nand,6Sonthe587ftelevation or.FireZones44Nand44Sonthe609ftelevation priortoimpacting onredundant safeshutdowncapability.)

hInorderforfiretospreadintotheshaftlocatedinFireZone138B,afireofsufficient durationandintensity mustoccurinthezonesadjacenttoFireZone138B.Theareainwhichthiszoneislocatedhasacombustible loadingofunder20,000Btu/ftforanequivalent fireseverityofunder15minutes.(Theactualcombustible loadingexistingatthistimeinthefireareaisapproximately 4079Btu/ftandequivalent fireseverityofthreeminutes.)

Thehighestconcentration ofcombustibles intheareaexistsinFireZonel.TheadjacentCVCSHoldUpTankRooms,FireZones138Aand138C,havenegligible actualcombustible loadings.

Duetothecombustible loadingsinthefireareainwhichFireZone138Bislocated,alongwiththenegligible quantities ofcombustible materialinadjacentfirezones,afireofthemagnitude thatwouldberequiredtoimpactonredundant Page9-201 safeshutdownequipment onupperelevations isnotacredibleevent.Inaddition, anautomatic detection systemisprovidedinFireZones1andlAthroughlHofthisfirearea.Theremaining

.zonesofthefireareacontaincombustible loadingofunder13,000Btu/ft.(Actualcombustible loadingatthistimeis.negligible.)

Firesthatinvolvecombustible materials inthisfireareawillbepromptlydetectedandresultinthe'initiation offirebrigadeactivities.

Shouldanysmokefromafireonthiselevation filterintoFireZone138BandspreaduptheshaftintoFireZone6A,itwillnotresultinfirespreadupintoFireZone6A(andhencepotentially intoFireZones6N,6S,44N,or44S)-duetothelack'ofcombustible materials toigniteinFireZone6A.Conclusion Basedonthepreceding evaluation, reasonable assurance isprovidedthatafireonthe573or.562ftelevations oftheAuxiliary BuildingwillnotspreaduptheshaftinFireZone138BtoFireZone6A.andspreadfromtheresoastoimpairredundant safeshutdowncapabilities.

Inaddition, reasonable assurance isprovidedthatthisevaluation doesnotimpactonotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)FireZones138Band6Ahavecombustible loadingsofunder13,000Btu/ft,withnegligible quantities offixedcombustibles existingatthistime.Page9-202 (2)(3)FireZones138Band6Aarebothhighradiation areasthatdonotprovideaccesstootherplantlocations.

IIThefireareainwhichFireZone138Bis)ocatedhasacombustible loadingofunder20,000Btu/ft(4)FireZones138Band6Adonotcontainanysafeshutdownequipment orcables;assuch,therewillbenoimpactonsafeshutdowncapability evenshouldfirespreadbetweenthetwozones.(5)Automatic detection isprovidedinallfirezonesonthe573ftelevation oftheAuxiliary Buildingthatcontainfixedcombustible materials.

(6)ShouldsmokeandheatfromafirefilterintoFireZone138BandspreaduptheshafttoFireZone6A,firewillnotignitein.thezoneduetothelackoffixedcombustible materials inFireZone6A.Page9-203 9.34FireZone36toFireZone5BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofanundampered ductpenetrating thebarrierseparating FireZone36fromFireZone5.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZone36islocatedonthe609ftelevation oftheAuxiliary Building.

"Itispartofalargerfireareathat.:includes FireZones3,31,32,35,'8,49,50,51,52,69,106,'107,and146.FireZone5islocatedonthe587ftelevation of'theAuxiliary Building.

Itispartofalargerfireareathat~'includes FireZones6A,6N,6M,6S,61,64A,64B,65A,and65B.>.Theundampered HVACductpassesthroughFireZone48intoFire'<<'one36andthenpenetrates thefloorofFireZone36,whichisconstructed of30in.thickconcrete.

TheductthenpassesintoFireZone5.Airisexhausted throughtheductfromFireZones48and36throughFireZone5.SafeShutdownEuimentFireZone36doesnotcontainanysafeshutdownrelated"equipment orcable.Otherzonesinthisareacontaining safeshutdownequipment orcablesareFireZones32,50,51,52,69,106and107.Themodifications proposedinSection8ofthisPage9-204 report,alongwithotherevaluations contained inthissection,providereasonable assurance thatonetrainof.safeshutdownsystemswillbeavailable incaseofafireinthisfirearea.FireZone5containssafeshutdownequipment orcablesforbothUnits1and2.Otherzonesin=thisareacontaining safeshutdownsystemsareFireZones6N,6M,and6S.FireZone6McontainsbothUnit1and2systems,FireZone6Ncontainsprimarily Unit1systems,'andFireZone6Scontainsprimarily Unit2systems.Themodifications proposedinSection8ofthisreport,alongwith,,other evaluat.ions contained inthissection,providereasonable assurance thatsafeshutdowncapability willbeavailable incaseofafireoriginating inthisfirearea.FireProtection EuimentFireZone36isnot"providedwithautomatic detection orautomatic suppression.

capability.

Otherzonesinthisareacontaining detection an'd/orsuppression capabilities areFireZones3(partialionization detection anddrypilotsprinklers),

32,51,and52(ionization detection anddrypilotsprinklers);

48(ionization detection),

49,50,and69(ionization detection, andthermistor detection withmanualwatersprayforthecharcoalfilterunits),andFireZones106and107(heatdetection).

Ionization smokedetection anddrypilotpreaction sprinkler systemsareprovidedinFireZone5,6N,6M,6S,64A,64B,65A,and65B.FireZone61isprovidedwithionization detection, whileFireZone6Aisnotprovi:ded withdetection orsuppression capability.

Page9-205 FireHazardsAnalsisFireZone36hasacombustible loadingofunder20,000-Btu/ftforanequivalent fireseverityoflessthan15minutes.(Theactualfixedcombustible loadingexistingatthistimeis3,719Btu/ftforequivalent fireseverityof2.7minutes.)

The2'fireareainwhichthiszoneislocatedhasatotalcombustible loadingofunder33,000Btu/ftforanequivalent fireseverityof25minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare17,283Btu/ftand12.9minutes,respectively.)

FireZone5hasacombustible loadingofunder27,000Btu/ft2foranequivalent fireseverityof20minutes.(Theactualcombustible loadingandequivalent fire"severity existingatthistimeare11,299Btu/ftand8.5'minutes, respectively.')

Theareain-whichthiszoneislocatedhasatotalcombustible loadingofunder27,000Btu/ftforanequivalent fireseverityof20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare8,947Btu/ftand6.5minutes,respectively.)

2FireZone36doesnotcontainsafeshutdownequipment orcables;assuch,firecouldspreadintothezonefromFireZone5withoutimpacting onredundant safeshutdowncapability.

ForfireinFireZone5tobeabletoimpactonlocations containing safeshutdownequipment inthefireareawhichhousesFireZone36,firewouldhavetospreadupintothe633ftelevation oftheAuxiliary Building.

There.arethree.routessuchafirecouldpotentially take.Page9-206 OneroutewouldbeforforfiretotravelfromFireZone5toFireZone36onthe609ftelevation.

ItwouldthenhavetotraveltoFireZone48onthe633ftelevation andthentoFireZone51.However,thisroutewouldrequirefiretospreaddirectlyintoFireZoneSlthroughthefueltransfercanalwhichrunsbetweenthetwozones.Thisisnotacredibleevent.Asecondroutewouldbe"forfiretotravelfromFireZone5toFireZone36onthe609ftelevation.

ItwouldthenhavetotraveltoFireZone48onthe633ftelevation, uptoFireZone69onthe650ftelevation, andthendowntoFireZones49,50,51,52,106,and107onthe633ftelevation.

Thisisnotacredibleeventdueto:(1)Thelowcombustible loadingsthroughout thesezones;(2)Thepresenceof,detection inFireZones48,69,49,50Sl,52,106,and107;(3)Thepresenceofdrypilotsprinklers inFireZones51and52;and(4)Theci'rcuitous paththatfiremusttaketospreadbetweentheseidentified firezones.Thethirdrouteisfor.firetospreadfromFireZone5toFireZones36and32onthe609ftelevation.

FromFireZone32,itwouldhavetospreaddirectlyintoFireZone69onthe650ftelevation andthendowntoFireZones49,50,51,52,106,and107onthe633ftelevation.

Thisisnotacredibleeventdueto:(1)Thelowcombustible loadingsthroughout thesezones;(2)Thepresenceofdetection inFireZones32,69,49,50,51,52,106,and107;Page9-207 (3)Thepresenceofdrypilotsprinklers inFireZones32,51and52;and(4)Thecircuitous paththatfiremusttaketospreadbetweentheseidentified firezones.Thesamecircuitous path'sexistforfiretotravelfromFireZones49,50,51,52,106,and107onthe633ftelevation oftheAuxiliary BuildingtoFireZones5,6N,6M,'and6Sonthethe587ftelevation.

Inaddition, thezonesonthe587ftelevation areallprovidedwithionization detection anddrypilotsprinkler systems,withtheexception ofFireZone61,whichisonlyprovidedwithanionization detection system.Therefore, firespreadbetweentheidentified zoneisnotacredibleevent.Conclusion Basedonthepreceding evaluation, reasonable assurance isprovidedthattheundampered ventilation ductpassingthroughthebarrierseparating FireZones5and36willnotimpactoneitherredundant safeshutdowncapability orotherevaluations orexemptions includedinthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)FireZgne36hasacombustible loadingofunder20,000Btu/ftforanequivalent fireseverityof15minutes.(Theactualfixedcorn)ustible loadingexistingatthistimeis3,719Btu/ft.)Thefireareainwhichthis-zoneislocatedhasatotalcombustible loadingofunder33,000Btu/ftforanequivalent fireseverityof25minutes.(2)FireZone5hasacombustible loadingofunder27,000Btu/ft2foranequivalent fireseverityof20minutes.Theareainwhichthiszoneislocatedhasatotalcombustible loadingofunder27,000Btu/ft2foranequivalent fireseverityof20minutes.Page9-208 (3)Thefireseverities existinginthezonesthroughwhichfiremusttraveltoreachzonescontaining safeshutdownequipment arenotsufficient toovercomethecircuitous pathswhichfiremusttake.(4)Automatic detection and/orautomatic suppression capabilities areprovidedinenoughoftheintervening firezonesbetweenzonescontaining safeshutdownequipment thatfirebrigaderesponsewilloccurwellbeforeredundant safeshutdowncapabilities arejeopardized.

Page9-209 9.35PireZone108toFireZone33ABoundarEvaluat'ion

~PuroeeThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofunsealedpenetrations and8anundampered installation ductinthebarrierseparating FireZone108fromFire'one33A.Inaddition, thisevaluation doesInotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZone108istheUnit1WestMainSteamVal'veEnclosure locatedinthewestmainsteamvalvehousewhichalsoincludesF~ireZone110.FireZone108rises,from"approximately the624ftelevation

-tothe682:ftelevation,'ith FireZone110joiningthiszonethrough,a

'haft.-openingin'heflooratthe624ftelevation.

Thesetwozonesarepartofalargerfireareathati'ncludes theUnit1andUnit2Turbine.Buildings, theUnit2westmainsteamvalvehouse,theScreenHouse,<>andtheServiceBuilding.

FireZone33Aislocatedonthe612ftelevation oftheAuxiliary Building.

Itis'partofalargerfireareathati'ncludes FireZones33,33B,and105'.FireZone33Arisesfromthe612ftelevation totheroofatthe644ftelevation.

ThenorthwallofFireZone108interfaces withthesouthwallofFireZone33Afromapproximately the624ftelevation tojustbelowtheroofatthe644ftelevation.

TwomainsteamlinePage9-210 pipespassatananglethrougha15ftwideby6fthighopening~~inthisinterface.

Eachpipeisapproximately 42in.indiameterwith8in.ofinsulation.

Inaddition,-

thepipesaredesignedsuchthatappr'oximately 6in.ofmovementisexpectedwhenthepipesgofromthehottocoldconditions.

Thereareseveralotherunsealedpenetrations throughthisboundaryinterface including anundampered HVACexhaustduct;however,theopeningprovidedforthetwomainsteampipesisthelargestoftheunprotected openingsandistheworstcaseboundingsituation.

Safe'hutdown EuimentFireZones33A,33B,and105containnosafeshutdownequipment.

Fire,Zone33,contains,thefollowing safeshutdowneequipment andassociated cables:(1)Unit1steamgenerators 1and4PORVs;(2)'teamgenerators 1and'auxiliary feedwater supplyvalves;t(3)Steamgenerators 1and4mainsteamstopvalves,,<<(MSSVs);

(4)Unit1IocalShutdownIndication panelsLSI-1andLSI-5;(5)Steamgenerators 1and4safetyreliefvalves;and(6)Steamgenerators 1and4pressuretransmitters.

ThecablingfortheUnit1'steamgenerators 1and4PORVsarealsoroutedthrough,and locatedinFireZone33A.FireZone108containsthefollowing safeshutdownequipment andtheirassociated cables:Page.9-211 (1)Unit1steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and3;(3)Steamgenerators 2and3mainsteamstop.valves(MSSVs);(4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit1turbinedrivenAFWpumpsteamsupplyisolation valves..FireProtection EuimentFireZones108and110arenotprovidedwithautomatic detection orautomatic suppression capability.

FireZone33Aisprovidedwithautomatic

-detection capability, asareFireZones33and33Binthesamefire'area.Athermistor andmanualwaterspraysuppression system..areprovidedforthecharcoal'filteru'nitinFireZone33A.FireZone105isprovidedwithanautomatic wetpipesprinkler system.FireHazardsAnalsisTheseismicgapexemption requestcontained inSection7.13ofthisreportdemonstrated thatfirecouldinvolveFireZones33A,33B,and108withoutimpacting onredundant safeshutdowncapability.

Atworst,thiswouldresultinlossofsteamgenerators 2and'3inFireZone108alongwiththePORVsforsteamgenerators' and4inFireZone33.However,thesevalvescanbemanuallyoperatedinFireZone33.Thefixedsuppression exemption requestinSection7.8ofthisreportdemonstrated thatafireoriginating ineitherFireZone33,FireZone33A,orFireZone33BwillnotimpactonPage9-212 Section9.28ofthisreport,combining FireArea105withFireZones33,33A,and33Bwillnotimpactoneithersafeshutdowncapability orthefixedsuppression exemption requestforFireZones33,33A,and33B.Theonlypotential impactonsafeshutdowncapability thatmustbeaddressed istheprobability forfiretospreadtoFireZones33and108simultaneously.

FireZone108hasacombustible loadingoflessthan27,000Btu/ftwithanequivalent fireseverityof20minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare10,187Btu/ftand7.6minutes,respectively.)

Shouldanytransient combustibles be,broughtintothecombustible loadingcouldpotentially increasetoapproximately, 40,000Btu/ft.Thiscouldresultinamaximumequivalent fireseverityofapproximately 30minutes.Postulated firesoccurring inFireZone108wouldtendtospreadupwardsinthezonetowardsthe682ftelevation asopposedtospreading downthrough,theunsealedpenetrations atthe635to644ftelevations intoFireZone33A.Thelackofcombustible liquidseitherexistingorrequiredinFireZone108reinforces thisassumedpathoffirespread.Theproductsofcombustion fromsuchafirewouldhavetobankdownapproximately 50ftpriortoenteringFireZone33A.Givenatotalcombustible loadingof40;000Btu/ft,thisisnota'redible event.Therefore, afireoriginating inFireZone108thatspreadsdownintoFireZone33AandthenintoFireZone33isnotacredibleevent.Page9-213 ThefireareainwhichFireZones33,33A,33B,and105arelocatedhasacombustible loadingandequivalent fireseverityofunder27,000Btu/ftand20minutesrespectively.

(Theactualfixedcombustible loadingand"equivalent fireseverityexisting-atthistimeisapproximately 11,530Btu/ftand8.5minutes2respectively.)

ThemajorityofthisloadingexistsinFireZone105,whichisprotected byanautomatic wetpipesprinkler system.Thecombust.ible loadingsand'quivalent fireseverities inFireZones33and33Aareunder27,000Btu/ftand20minutes(withactualvaluesoflessthan10,840Btu/ftand8minuteseach).InorderforfiretoimpactonbothFireZone108andFireZone33simultaneously, itwouldhavetooriginate inFireZone33Aor.33B.Theproductsofcombustion wouldthenhaveto'spreadintobothfirezonesinordertoimpactonredundant safeshutdowncapability.

Thefollowing factorsacttomitigatetheprobability ofthisoccurring:

(1)FireZone33Aisapproximately 170ftinlength;(2)Anautomatic detection system-isprovidedthroughout FireZones33,33A,and33B,including automatic thermistor detection andmanualwaterspraysuppression forthecharcoalfilterunitinFireZone33A,therebyensuringpromptfirebrigaderesponseandinitiation ofmanualfirefightingactivities; (3)FireZones33,33A,and108h~veapproximate volumesof70,720,101,840and42,159ft,respectively;

'I(4)Whilethereisacontinuity ofcombustibles betweenFireZones33and33Athatcouldresultinfiredamageinbothfirezones,thecontinuity ofcombustibles does!Page9-2144 notextendintoFireZone108.Therefore, firedamageinFireZone108willhavetooccurasaresultofhotcombustible gasesspreading intothezone;and(5)Duetothe170ftofspatialseparation betweenFireZones108and33,alongwiththelargevolumesofFireZones33,33A,and108,productsofcombustion thatdotraversethisroutewillbesufficiently dispersed andcooledsoasnottoposeahazardtoFireZones108and33simultaneously.

providedthatafirewillnotimpactonredundant safeshutdowncapability locatedinFireZones108,33A,and33.Inaddition, impactonotherevaluations ortheevaluation doesnotadversely exemption requestscontained inthisreport.,Thebaseswhichjustifythese.conclusions aresumm'arized asfollows:(1)FireZgne108hasacombustible loadingofunder27,000Btu/ft.,Shouldanytransient combustibles bebroughtintoFireZone108,thecombustible loadcou/dpotentially increasetoapproximately 40,000Btu/ftThiscouldresultinamaximumequivalent fireseverityof30minutes.Basedontheseconsiderations, the'robability offireadversely impacting onFireZones108and33simultaneously isnotacredibleevent.Conclusion Basedonthepreceding evaluation, reasonable assurance is(2)ThefireareainwhichFireZones33,33A,33B,and105arelocatedhasacombustible loadingandequivalent fireseverityofunder27,000Btu/ftand20minutesrespectively.

(Theactualfixedcombustible loadingandequivalent fireseverityexi~tingatthistimeisapproximately 11,530Btu/ftand8.5minutes,respectively.)

(3)ThemajorityofthisloadingexistsinFireZone105,whichisprotected byanautomatic wetpipesprinkler system.Page9-215 (4)Thecombustible loadingsandequivalent fireseverities inFireZones33and33Aareunder27,000Btu/ft2and20minutes(withactualvaluesoflessthan10,840Btu/ft2and8minuteseach).(5)Theseismicgapexemption requestcontained inSection7.13ofthisreportdemonstrated thatfirecouldinvolveFireZones33A,33B,and108withoutimpacting onredundant safeshutdowncapability.

(6)Thefixedsuppression exemption requestinSection7.8ofthisreportdemonstrated thatafireoriginating ineitherFireZone33,FireZone33A,orFireZone33Bwillnotimpactonredundant safeshutdowncapability.

(7)Anautomatic detection systemisprovidedthroughout FireZones33,33A,and33B,therebyensuringpromptfirebrigaderesponseandinitiation ofmanualfirefightingactivities; (8)FireZones33,33A,and108haveapproximate volumesof70,720,101,840,and42,159ft3,respectively; (9)Duetothe170ftofspatialseparation betweenFireZones108and33,alongwiththelargevolumesofFireZones33,.33A,and108,productsofcombustion thatdotraversethisroutewillbesufficiently dispersed andcooledsoasnottoposeahazardtoFireZones108and33simultaneously.

Page9-216 ThecablingfortheUnit2steamgenerators 1and4PORVsarealsoroutedthroughandlocatedinFireZone34A.FireZone109containsthefollowing safeshutdownequipment andtheirassociated cables:(1)Unit2steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and3;(3)Steamgenerators 2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit2turbinedrivenAFWpumpsteamsupplyisolation valves.FireProtection EuimentFireZones109andillarenotprovidedwithautomatic detection orautomatic suppression capability.

FireZone34Aisprovidedwithautomatic detection capability, asareFireZones34and34Binthesamefire,area.Athermistor detection andmanualwaterspraysuppression systemareprovidedforthecharcoalfilterunitinFireZone34A.FireHazardsAnalsisTheseismicgapexemption requestcontained inSect'ion7.13ofthisreportdemonstrated thatfirecouldinvolveFireZones34A,34B,and109withoutimpacting onredundant safeshutdowncapability.

Atworst,thiswouldresultinlossofsteamgenerators 2and3inFireZone109alongwiththePORVsforsteamgenerators 1and4inFireZone34.However,thesevalvescanbemanuallyoperatedinFireZone34.Page9-219 Thefixedsuppression exemption requestinSection7.9of,thisreportdemonstrated thatafireoriginating ineither"Fire,Zone34,FireZone34A,orFireZone34Bwillnotimpacton.;redundant safeshutdowncapability.

Theonlypotential impacton.;safeshutdowncapability thatmustbeaddressed isthe~probability forfiretospreadtoFireZones34and109-'simultaneously.

FireZone109hasacombustible loadingoflessthan33,000Btu/ftwithequivalent fireseverityof25minutes.Shouldanytransient combustibles bebroughtintoFireZone109,the...combustible couldpotentially increasetoapproximately 47,000,Btu/ft.Thiscouldresultinamaximumequivalent fireseverity'ofunder35minutes.Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare15,872Btu/ft.and11.8minutes,respectively.

Postulated firesoccurring inFireZone109wouldtendtospreadupwardsinthezonetowardsthe682ftelevation asopposedtospreading downthroughtheunsealedpenetrations atthe635to644ftelevations intoFireZone34A.Thelackofcombustible liquidseitherexistingorrequiredinFireZone109'-reinforces thisassumedpathoffirespread.Theproductsofcombustion fromsuchafirewouldhavetobankdownapproximately 50ftpriortoenteringFireZone34A.Givenatotalcombustible loadingofunder47,000Btu/ftthisisnotacredible, event.Therefore, afireoriginating inFireZone109thatspreadsdownintoFireZone34Aandthenintoevent.FireZone34isnotacrediblePage9-220 ThefireareainwhichFireZones34,34A,and34Barelocatedhasacombustible loadingandequivalent fireseverityofapproximately 20,000Btu/ft2and15minutesrespectively.

(Theactualfixedcombustible loadingandequivalent fireseverityexistingatthistimeislessthan5,909Btu/ft2and4.3minutesrespectively.)

Thecombustible loadingsandequivalent fireseverities inFireZones34and34Aareunder20,000Btu/ft2and15minutes(withactualvaluesoflessthan5,937Btu/ft2and4.5minuteseach).InorderforfiretoimpactonbothFireZone109andFireZone34simultaneously, itwouldhavetooriginate inFireZonezonesinorderintobothfire~~shutdowncapability.

Thefollowing probability ofthisoccurring:

toimpactfactors34Aor34B.Theproductsofcombustion wouldthenhavetospreadonredundant safeacttomitigatethe(1)FireZone34Aisapproximately 170ftinlength;(2)Anautomatic detection systemisprovidedthxoughout FireZones34,34A,and34B,including automatic thermistor detection andmanualwaterspraysuppression forthecharcoalfilterunitinFireZone34A,therebyensuringpromptfirebrigaderesponseandinitiation ofmanualfirefightingactivities; (3)FireZones34,34A,and109haveapproximate volumesof'.70,720,101,840and42,159ft3.,respectively; (4)Whilethereisacontinuity ofcombustibles betweenFireZones34and34Athatcouldresultinfiredamageinbothfirezones,thecontinuity ofcombustibles doesnotextendintoFireZone109.Therefore, firedamageinFireZone109willhavetooccurasaresultofhotcombustible gasesspreading intothezone;andPage9-221 (5)Duetothe170ftofspatialseparation betweenFireZones109and34,alongwiththelargevolumesofFireZones34,34A,and109,productsofcombustion thatdotraversethisroutewillbesufficiently dispersed andcooledsoasnottoposeahazardtoFireZones109and34simultaneously.

Basedontheseconsiderations, theprobability offireadversely impacting onFireZones109and34simultaneously isnotacredibleevent.Conclusion Basedonthepreceding evaluation, reasonable assurance isprovidedthatafirewillnotimpactonredundant safeshutdown0capability locatedinFireZones109,34A,and34.Inaddition, theevaluation doesnotadversely impactonotherevaluations orexemption requestscontained'n thisreport.Thebaseswhichjustifytheseconclusions aresummarized asfollows:(1)FireZgne109hasacombustible loadingofunder33,000Btu/ft.Thecombustible couldpotentially increasetoapproximately 47,000Btu/ft2.Thiscouldresultinamaximumequivalent-fireseverityofunder35,minutes.(2)(3)ThefireareainwhichFireZones34,34A,and34Barelocatedhasacombustible loadingandequivalent fireseverityofapproximately 20000Btu/ft2and.15minutesrespectively.

(Theactualfixedcombustible loadingandequivalent fireseverityexistingatthistimeislessthan5909Btu/ft2and4.3minutesrespectively.)

Thecombustible loadingsandequivalent fireseverities inFireZones34and34Aareunder20,000Btu/ft2and15minutes(withactualvaluesoflessthan5937-Btu/ft2and4.5minuteseach).(4)Theseismicgapexemption requestcontained inSection7.13ofthisreportdemonstrated thatfirecouldinvolveFireZones34A,34B,and109withoutimpacting onredundant safeshutdowncapability.

Page9-222 (5)(6)Thefixedsuppression exemption requestinSection7.9ofthisreportdemonstrated thatafireoriginating ineitherFireZone34,FireZone34A,orFireZone34Bwillnotimpactonredundant safeshutdowncapability.

Anautomat.ic detection systemisprovidedthroughout FireZones34,.34A,and34B,therebyensuringpromptf.irebrigaderesponseandinitiation ofmanualfirefightin'g activities; (7)=FireZones34,34A,and109haveapproximate volumesof70,720,101,840,and42,159ft3,respectively; (8)Duetothe170ftofspatialseparation betweenFireZones109and34,alongwiththelargevolumesofFireZones34,34A,and109,productsofcombustion thatdotraversethisroutewillbesufficiently dispersed andcooledsoasnottoposeahazardtoFireZones109and34simultaneously.

Page9-223 9.37FireZone32toFireZone5BoundarEvaluation

.~PuruseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability of:(1)anundampered duct;(2)anunrateddoor;and(3).severalminorunsealedpenetrations inthewallandceilingof'stairwayenclosure separating FireZone'5fromFireZone32.Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.*FireZone32islocatedonthe609ftelevation oftheAuxiliary Building.

Itisopenfromthe609ftelevation uptoPtheroofoftheAuxiliary

Building, whichisatapproximately the705ftelevation.

Itispartofalargerfireareathatinc'ludes FireZones3,31,35',36,48,49,50;51,52,69,106,107,and146.FireZone5islocatedonthe587ft'levation oftheAuxiliary Building.

ItispartofalargerfireareathatincludesFireZones6A,6N,6M,6S,61,64A,64B,65A,and65B.Anopenstairwayinthenortheast cornerofFireZone5providesaccessuptoFireZone32.Atthetopofthestairsabovethe609ftelevation, anenclosure constructed of8in.thickconcreteblock(onthenorth,east,andwestsidesonly)witha5in.thickpouredconcreteceilingisprovided.

Theconfiguration ofthebarriersresultsintheopenstairwayportionofthe609ftelevation beingincludedaspartofFireZone5onthe587ftelevation.

Page9-224 AnunratedhollowmetaldoorprovidesaccessfromFireZone5toFireZone32fromthetopofthestairwaythroughtheeastwallofthestairwayenclosure.

Aventilation ductthatsuppliesoutsideairthroughFireZone32tothecharcoalfilterunitsinFireZone5penetrates theceilingofthestairwayenclosure andisnotprovidedwithafiredamper.A1-in.gapexistsbetweentheductandtheceilingwhichisnotsealed.Inaddition, anunsealedgapexistsaroundastandpipe penetrating throughtheeastwallofthestairwayenclosure toFireZone32.SafeShutdownEuimentFireZone32doesnotcontainanysafeshutdownequipment butdoescontainsafeshutdowncablesassociated withtwooftheUnit1safetyinjection accumulator valves.Otherzonesinthisareacontaining safeshutdownequipmezt and/or:cablesareFireZones50,51,52,69,106,and107..Themodifications proposedinSection8ofthisreport,alongwithotherevaluations contained inthissection,providereasonable assurance thatonetrainofsafeshutdownsystemswillbeavailable incaseofafireinthisfirearea.FireZone5containssafeshutdownequipment orcablesforbothUnits1and2.Otherzonesinthisareacontaining safeEshutdownsystemsareFireZones6N,6M,and6S.FireZone6McontainsbothUnit1and2systems,FireZone6Ncontainsprimarily Unit1systems,andFireZone6Scontainsprimarily Page9-225 Unit2systems.Themodifications proposedinSection8ofthisreport,alongwithotherevaluations contained inthissection,.,provide reasonable assurance thatsafeshutdowncapability will'Ibeavailable incaseofafireoriginating inthisfirearea.FireProtection EuimentFireZone32isprovidedwithautomatic detection anddrypilotpreaction sprinklers attheceilingofthe'50ftelevation.

Otherzonesinthisareacontaining detection and/orsuppression capabilities areFireZones3(partialionization detection anddry,pilotsprinklers),

5l,.and52(ionization

~detection anddrypilot'prinklers),

48(ionization detection),

...49,50,and69(ionization detection, andthermistor detectors withmanualwatersprayforthecharcoalfilterunits),andFire'ones106and107(heatdetection).

Ionization smokedetection anddrypilotpreaction sprinkler il~systemsareprovidedinFireZone5,6N,6M,6S,64A,64B,65A,and65B.FireZone61isprovidedwithionization detection, whileFireZone6Aisnotprovidedwithdetection orsuppression capability.

FireHazardsAnalsisFireZone32hasacombustible loadingofunder40,000Btu/ftforanequivalent fireseverityoflessthan30minutes.(Theactualfixedcombustible loadingandequivalent fireseverityexistingatthistimearelessthan23,311Btu/ftand117.4minutes,respectively).

ThefireareainwhichthiszoneisPage9-226 locatedhasatotalcombustible loadingoflessthan33,000Btu/ft2foranequivalent fireseverityof25minutes(Theactualcombustible loadingandequivalent fireseverityexistingatthistimearea17,283Btu/ftand12.9minutes,respectively.)

FireZone5hasacombustible loadingofunder27,000Btu/ftfor2anequivalent fireseverityof20minutes.(Theactualcombusti'ble loadingandequivalent fireseverityexistingatthis.timearea11,229Btu/ftand8.5minuteseach.)Theareainwhichthiszoneislocatedhasatotalcombustible loadingofunder27,000Btu/ftforanequivalent fireseverityof20minutes.(Theactualcombustible loadingand'equivalent fireseverityexistingatthistimeare8947Btu/ftand6.5minutes2respectively.)

FireZone32doesnotcontainsafeshutdownequipment orcables;assuch,firecouldspreadintothezonefromFireZone..5withoutimpacting onredundant safeshutdowncapability.

Forfirein'FireZone5tobeabletoimpactonlocations containing safeshutdownequipment inthefireareawhichhousesFireZone32,firewouldhaveto'preadupintothe633ftelevation oftheAuxiliary BuildingandimpactonFireZones50,51,52,106,or107.Therearethreeroutessuchafirecouldpotentially take.OneroutewouldbeforforfiretotravelfromFireZone5toFireZone32throughtheunrateddoor,undampered ductorunsealedgapsaroundtheductandstandpipe.

penetrations.

ItwouldthenhavetotravelintoFireZone48onthe633ftPage9-227 elevation throughanunrateddoorandthenthroughthewestwallofFireZone48directlyinto,FireZone51.However,thisroute.wouldrequirefiretospreaddirectlyintoFireZone51throughthefueltransfercanalwhichrunsbetweenthetwozones.Thisisnotacredibleevent.Asecondroutewouldbefor:firetotravelfromFireZone5toFireZone32onthe609ftelevation.

ItwouldthenhavetotravelintoFire-Zone48:onthe633ftelevation throughanunrateddoor,uptoFireZone69onthe650ftelevation, andthendowntoFireZones49,50,51,52,106,and107onthe633"ftelevation.

Thisisnotacredibleeventdueto:(1)Thelowcombustible loadingsthroughout thesezones;(2)Thepresence'of detection inFireZones48,69,49,50,51,52,106,and107;(3)Thepresenceofdrypilotsprinklers inFireZones51and52;and(4)Thecircuitous paththatfiremusttaketospreadbetweentheseidentified firezones.4Thethirdrouteisforfiretospread.fromFireZone5toFireZone32onthe609ftelevation.

Thef'irewouldthenhavetospreaduptothe650ftelevation ofFireZone32,spreaddirectlyintoFireZone69onthe650ftelevation, andthenspreaddowntoFireZones49,50,51,52,106,and107onthe633ftelevatian.

Thisisnotacredibleeventdueto:(1)Thelowcombustible loadingsthroughout thesezones;(2)Thepresenceofdetection inFireZones32,69,49,50,51,52,106,and107;Page9-228 (3)Thepresenceofdrypilotsprinklers inFireZones32,51and52;and(4)Thecircuitous paththatfiremusttaketospreadbetweentheseidentified firezones.Thesamecircuitous pathsexistforfireto.travelfromFireZones49,50,51,52,106,and107onthe633ftelevation oftheAuxiliary BuildingtoFireZones5,6N,6M,and6Sonthethe587ftelevation.

Inaddition, thezonesonthe587ftelevation areallprovidedwithionization detection anddrypilotsprinkler systems,withtheexception ofFireZone61,whichisonlyprovidedwithanionization spreadbetweenthei'dentif'ied Conclusion detection system.Therefore, firezonesisnota'credible event.Basedonthepreceding evaluation, reasonable assurance isprovidedthattheundampered ventilation duct,unrateddoor,andunsealedpenetrations throughthebarriersseparating FireZones5and32willnotimpactoneitherredundant safeshutdowncapability.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)FireZ~ne32hasacombustible loadingofunder40,000Btu/ftforanequivalent fireseverityof30minutes.(Theactualfixedcombustible loadingexistingatthistimeislessthan'3,311 Btu/ft2.)

Thefireareainwhichthiszoneislocatedhasatotalcombustible loadingof33,000Btu/ft2foranequivalent fireseverityof25minutes.Page9-229 (2)FireZone5hasacombustible loadingofunder27,000Btu/ft2foranequivalent fireseverityof20minutes.Theareainwhichthiszoneislocatedhasatotalcombustible loadingofunder27,000Btu/ft2foranequivalent fireseverityof20minutes.(3)Thefireseverities existinginthezonesthroughwhichfiremusttraveltoreachzonescontaining safeshutdownequipment arenotsufficient toovercomethecircuitous pathswhichfiremusttake.(4)Automatic detection and/orautomatic suppression capabilities areprovidedinenoughoftheintervening firezonesthatfirebrigaderesponsewilloccurwellbeforeredundant safeshutdowncapabilities arejeopardized.

Page9-230 9.38FireZone69toFireZones108and109BoundarEvaluation

~PuroseThepurposeofthisevaluation istoanalyzetheimpactonredundant safeshutdowncapability ofundampered containment instrumentation roomexhaustductworkthatpenetrate thebarriersseparating FireZone69fromFireZones108and109.Inaddition, thepurposeofthisevaluation istodemonstrate thatitdoesnotadversely impactoneithertheexemptions ortechnical evaluations appearing inSections7and9ofthisreport.FireZone69islocatedonthe650ftelevation oftheAuxiliary Building.

ItispartofalargerfireareathatCincludes3,31,.32,35,36,48,49,50,51,52,106,107,and146.FireZones108and109risevertically fromthe624ftelevation totheroofofeachunits'est MainSteamValveHouse.ThetwozonesarepartofalargerfireareathatincludestheUnit1andUnit2TurbineBuildings, theServiceBuilding, theScreenHouse,andtheUnit1andUnit2WestMainSteamValveEnclosures.

Containment instrumentation roomexhaustductworkrisesupfromtheroofoftheInstrumentation RoomsinFireZones33Aand34AandentersFireZones108and109.TheductworkpassesthroughFireZones108and109intoFireZone69.One14in.diameterductpenetrates fromFireZone108intoFireZone69,Cwithasimilarductpenetrating fromFireZone109intoFire.Zone.Page9-231 69.TheductworkthenproceedstotheplantventsystempassingthroughtheroofofFireZone69totheexterior.

Firedampersarenotprovidedwheretheductworkpenetrates FireZones108and109fromFireZone33A,34A,or69.SafeShutdownEuimentFireZone69containstheUnit1andUnit2CCWsurgetankmanualisolation valves(1-CCW-214, 1-CCW-220, 2-CCW-214, 2-CCW-220)..FireZone69alsocontainscablesassociated withthefollowing Unit1components (seeTable4-3andSection4.4.5):(1)twopressurizer PORVs;(2)twopressurizer blockvalves;(3)tworeactorheadventvalves;(4)twopost-accident samplingvalves;and(5)safetyinjection accumulator valves.Otherfirezonesthatdocontainsafeshutdowncableand/or'equipment intheareainwhichFireZone69islocatedareFireZones32,Fire50,51,52,106,and107.Zone108containsthefollowing safeshutdownequipment andtheirassociated cables:.(1)Unit1steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and3;(3)Steam'enerators 2and3mainsteamstopvalves(MSSVs);Page9-232 (4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit1turbinedrivenAFWpumpsteamsupplyisolation valves.FireZone109containsthefollowing safeshutdownequipment andtheirassociated cables:(1)Unit2steamgenerators 2and3PORVs;(2)Pressuretransmitters forsteamgenerators 2and3;(3)Steamgenerators 2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators 2and3safetyreliefvalves;and(5)Unit2turbinedrivenAFWpumpsteamsupplyisolation valves.Redundant safeshutdowncapability isavailable forFireZones108,109and69outsideofthefireareainwhichtheyarelocated.Therefore, firecouldinvolveFireZones69,108,and109withoutimpacting onredundant safeshutdowncapability.

.FireProtection EuimentFireZone69isprovidedwithautomatic detection capability andmanualwaterspraysuppression fortheAHVsinthezone.NeitherFireZone108or109containautomatic detection orsuppression capability.

FireHazardsAnalsisFireZones108and109haveacombustible loadingofunder27,000and33,000Btu/ftforanequivalent fireseverityofunder'0and25minutes,respectively.

(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeare10,187Btu/ftand2.2minutesforFireZone108,and15,872Page9-233 Btu/ftand11.8minutesforFireZone109,respectively.)

Should;."transient combustibles bebroughtintothezone,thecombustible loadingcouldincreaseto40,000Btu/ftforFireZone108,and-47,000Btu/ftforFireZone109.Thiscouldresultinan.equivalent fireseverityof30and35minutes,respectively.

FireZone69hasacombustible loadingofunder20,000~Btu/ftforanequivalent fireseverityofunder15minutes.(Theactualcombustible loadingandequivalent fireseverityexistingatthistimeislessthan2998Btu/ftand2.2minutes,respectively).

Theareainwhichthiszoneislocatedhasan,average combustible loadingoflessthan33,000Btu/ftforanequivalent fireseverityof25minutes.(Theactualcombustible

~.loading andequivalent fireseverityexistingatthistimeare,17,283Btu/ftand12.9minutes,respectively).

'Theseismicgapexemption requestcontained inSection7.14ofthisreportdemons'trated thatfirecouldinvolveFireZones49.and108orFireZones50and109withoutimpacting onredundant safeshutdowncapability.

Theevaluation contained inSection9.9ofthisreportcombinedFireZones49,50,51,and52intoalargerfireareathatincludedFireZones3,32,36,48,and69.Thecombination oftheseismicgapexemption requestandtheevaluation contained inSection9.9ofthisreportshowthatafireoriginating fromFireZones49,50,108,or109willnotjeopardize redundant safeshutdowncapability.

Thisisinpartduetothemodifications thatwerecompleted inFireZones51andPage9-234 52asrecommended intheMarch1983AppendixRsubmittal toensuresafeshutdowncapability gi'venafireoriginating inthesetwozonesorinFireZones49or50.Forfiretoadversely impactcapability, itwouldhavetospreadon,redundant safeshutdowntothetwoAFWbatteryroomsonthe633ftelevation of'theAuxiliary Bui'lding'Fire Zones'106 and107)ortheirassociated cableslocatedinFireZones52and50respectively.

Thefirewouldalsohavetospreadtothetwocorridors runningbetweentheUnit1andUnit2dieselgenerator roomsonthe591ftelevation of'theTurbineBuildings.

Afirethatspreadsinthismannercouldresultinthelossofbothturbine-driven AFWpumpsand3outof.4,diesel generators.

Theevaluation contained

-in"Section'.30 ofthisreportaddressed combining FireZones106and,107WithFireZones49,50,51,52,3,31,32,35,=36,48,69,and146to'formalargerfirearea.Thepotential forfiretotospreadtoFireZones52or106andFireZones50or107wasaddressed.

Thisfirewasnotconsidered acred'ible eventduetothepresenceofautomatic detection inallfourzonesandautomatic drypilotsuppression inFireZone52.Theevaluation thatcombinedtheUnit1andUnit'2TurbineBuildings intoalargerfirearea,contained inSection9.11ofthisreport,addressed thepossibility offireintheTurbineBuildings spreading tothecorridors betweenthedieselgenerator rooms,ineachunit.Thepotential forthistooccurwasalsoidentified asbeinganunlikelyevent.Page9-235 Inadditiontothetwounlikelyeventsoccurring asidentified inSections9.11and9.30ofthisreport,firewouldalsohave.tospreadfromFireZones108and109intheWestMainSteamValveEnclosures foreachunitintoFireZone69onthe650ftelevation oftheAuxiliary Building.

FromFireZone69,thefirewouldthenhavetospread'downintoFireZones106or52andFireZones50"or107onthe633ftelevation.

Thisfire,whichspreadsthroughout

'theUnit1andUnit2TurbineBuildings andfromtheretothe650and633ftelevations oftheAuxiliary Buildingisnotacredibleevent.Theonlyotherpotential firewhichshouldbeaddressed inthisevaluation.,is onethat.originates

-in,FireZone69,spreadstobothFireZones.108.and109simultaneously, andfromtherespreads.through.FireZones33Aand34AintoFireZones33and34.A~firethatspreadsin'hismannercouldresultinthelossofallfoursteamgenerators inbothunits.Thetwoevaluations contained

.inSectians9.35and9.36ofthisreportaddressthepotential forfiretospreadfromeitherFireZone108orFireZone109intoeitherFireZone33orFireZone34.Thetypesoffiresidentified inthesetwoevaluations werenotconsidered credibleevents.Forfiretoaccomplish thesamegoal,butalsooriginate inFireZone69,itwouldhavetobeafirefarlargerthancouldbesupported bythe20,000Btu/ft2combustible loadingexistinginFireZone69.Therefore, thisfireisalsonotacredibleevent.Page9-236

'Conclusions Basedonthepreceding evaluation, reasonable assurance isprovidedthatafirethatinvolveseitherFireZones69,108,or109willnotadversely impactonredundant safeshutdowncapabilities viatheundampered containment instrument roompiping/ductwork penetrating throughthefirezones.Inaddition, theundampered pipe/ducts willnotadversely impactonotherevaluations orexemptions contained inthis,report.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)Thecombustible loadingsinthezonesofconcernarelessthan20,000Btu/ftforFireZone9;40,000Btu/ftforFireZone108;and47,000Btu/ftforFireZone109.(2)Automatic detection capability isprovidedinFireZone69whichwouldresult'in.prompt'ire brigaderesponsegivenafireinthiszone.('3)Previously evaluations have'ddressed mostofthepotential firesthatcouldaffectthezonesofconcernandtheywereidentified asnotbeingcredibleevents.(4)Forfiretoimpactonredundant safeshutdowncapability, itwouldeitherhaveto(1)spreadtobothWestMainSteamValveEnclosures simultaneously or(2)involveboththe591ftelevation oftheUnit1andUni't2TurbineBuildings andthe633ftelevation oftheAuxiliary Bui*lding; neither.'ire isacredibleevent.Page9-237 9.39FireZone70toFireZone129BoundarEvaluation

~PuroeeThepurposeofthisevaluation istoanalyzetheimpacton.redundant safeshutdowncapability ofanunrateddoorconnecting FireZone129(theUnit1TurbineDeck)andFireZone70(the~Unit1ControlRoomHVACRoom).Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.FireZone129is.locatedonthe633ftej,.evation oftheUnit;1TurbineBuilding.

Itispartofalargerfireareathat,,includes theUnit1andUnit2TurbineBuildings, theWestMaint,SteamValveEnclosures ofeachunit,theService/Office

Building, andtheScreenHouse.FireZone70islocatedonthe650ftj'elevation oftheAuxiliary BuildingdirectlyabovetheUnit1;ControlRoom.ItispartofalargerfireareathatincludesFireZones71,72,and73.AnopenstairwayprovidesaccessuptheeastwallofFireZone129toanelevatorequipment roomatapproximately the650ftelevation.

Within.theelevatorequipment-roomisanunrateddoorthatleadsintoFireZone70.SafeShutdownEuimentNeitherFireZone129norFireZone70containequipment orcablesrequiredforsafeshutdownpurposes.

Page9-238 FireProtection EuimentFireZone129isprovidedwiththermistor detection andmanualwatersprayanddrychemicalsuppression fortheUnit1turbines.

FireZone70isprovidedwithanareaandductsmokedetection system,andautomatic thermistor detection withmanualwaterspraysuppression systemforthecharcoalfilterunitsinthezone.FireHazardsAnalsisDuetothe"locationofthethetwozonesarelocated,thedoorandtheelevations atwhichonlypotential firethatmustbeconsidered inthisevaluation isonethatspreadsintoFireZone70fromtheelevatorequipment roomofFireZone129.ThefirewouldthenhavetospreadintotheControlRoomsofbothunitssimultaneously inordertoimpactonredundant safeshutdowncapability.

ShouldfirespreadintoFireZone70,thenthepathsforfiretospreadareidentical tothosepresented inthe'evaluation contained inSection9.5ofthisreport.Thatevaluation, whichaddressed theunratedhatchesinthefloorofFireZones70and73toFireAreas53and54below,concluded thatfireoccurring inFireZones70,71,72,and/or73wouldnotimpactonredundant safeshutdowncapability.

Therefore, theanalysisandconclusions identified inSection9.5also'pply.

Conclusion Basedonthepreviousevaluation, reasonable assurance isprovidedthattheunrateddoorbetweenFireZones129and70doesPage9-239 notadversely impactoneitherredundant safeshutdowncapabilities.

Inaddition, thisevaluation doesnotadversely

'impactonotherevaluations orexemption requestscontained in.thisreport.Thebases,whichjustifythis=-conclusion aresummarize asfollows:(1)NeitherFireZone129norFireZone70containequipment orcablesrequiredforsafeshutdown.

(2)Duetothelocationoftheunrateddoor,whichis'pproximately 27ftabovetheflooroftheUnit1turbinedeckandwithinanel'evator equipment roomenclosure, theonlypotential forfirespreadisfromtheequ'ipment roomenclosure toFireZone70andfromtheretobothControlRoomssimultaneously.

(3)Thepotential forfiretospreadfromFireZones70,71,72,and/or73tobothControlRoomssimultaneously wasaddressed intheevaluation contained inSection9.5ofthisreport.Theconclusions ofthatevaluation, whichwasthatfirewouldnotspreadinthismanner,alsoapplytothisevaluation.

Page9-240 9.40FireZone7toFireZone61BoundarEvaluation

~PuroseThepurposeofthisfireareaboundaryevaluation istodetermine theimpactonredundant safeshutdowncapability oftwounratedfield-fabricated fusiblelinkactuatedguillotine typedamperspresently locatedbetweenFireZone7(Unit1"Quadrant1CableTunnel)andFireZone61'SprayAdditiveTankRoom):Inaddition, thisevaluation will-alsoverifythatthereisnoadverseimpacttootherevaluations orexemption requestscontain'ed

'inthisreport:DescritionFireZone7istheUnit'Quadrant1,CableTunnel,el.596eft.FireZone61'slocated'onthe587ft,elevation oftheAuxiliary Building.

Anunrated,fieldfabricated firedamperconstructed'f 3/8-in.steelplateisprovidedina3in.diameterHVACopeninginthecommonwallseparating FireZone7andFireZone61.FireZone7,byitself,makesupafirearea,whilethefireareacontaining FireZone61consistsofFireZones5,6A,6M,6N,6S,61,64A,64B,65Aand65B.FireZone5istheonlyadjacentzonetoFireZone61withinthesamefirearea..SafeShutdownEuimentFireZone7contains.

nosafeshutdowncomponents butdoescontainsafeshutdowncables.Thesafeshutdowncablesareassociated withvariousprocessmonitoring instrumentation, Page9-241 auxiliary feedwater'upply valvesandpressurizer PORV'sand~'Iblockvalves.Nosafeshutdowncomponents orcablesexistinFireZone61.However,thefireareawhichcontainsFireZone61doeshavesafeshutdowncomponents andcables.Amajorityofthesafeshutdowncomponents andcables'within'ireZone5,whichisadjace'nt toFireZone61,areassociated withlocalandalternate shutdownprocessmonitoring indication.

FireProtection EuimentFiredetection andautomatic carbondioxidesuppression s'ystemsareprovidedforFi;reZone7whichhasanequivalent f>ire',-severity;

.under:100'inutes(theactualfireseverityexistingat"thistimeisapproximately"-

87minutes).

WhileFireZone61-doesnot'aveanautomatic suppression system,itdoescontain'"a-smoke'etection systemwithmanualfirefightingequipment locatedoutsideof~thezone=.andanequivalent fireseverityunder20minutes(theactualfireseverityexistingatthistimeisapproximately 10minutes).

.FireZone5havinganequivalent fireseverityoflessthan20minutes(theactualfireseverityexistingatthist.imeisapproximately 8.5minutes),

isalsoequippedwithautomatic firedetection andwatersuppression systems.FireHazardsAnalsisFireZone7,withanequivalent fireseverityofunder100minutes(theactualfireseverityexistingatthistimeisPage9-242 approximately 87minutes),

isequippedwithanautomatic carbondioxidesuppression systemwhichwouldquicklyextinguish a..fireinthiszone.Therefore, reasonable assurance isprovidedthatafireoriginating withinFireZone7wouldnotspreadtoanyotherfireareas/zo'nes.

FireZone61,.although notequippedwithanautomatic suppression

.system,is.providedwithan.ionization smokedetection systemtoensurefastresponsetoanyfirestartingwithinthiszone.Thesmokedetection systemcoupledwith:(1)thelackofsafeshutdowncablesorequipment withinthe-zone;(2)an,equivalent

-fireseverity ofunder20minutes(theactualfireseverityexistingatthistimeisapproximately 10minutes);

and(3),manualfirefighting; equipment locatedoutsidethezone,.ensuresafastresponseandextinguishment'f anyfirestartingwithinthiszone.Ifa,fireshould.start,inFireZone5.(theonlyadjacentfire,zonetoFireZone'1withinthesamefirearea)thedetection

.andsuppression

'systems, coupledwiththeequivalent fire(theactualfireseverityexisting8.5minutes),

providesreasonable notspreadtoFireZone61.severityofunder20minutes'atthistimeisapproximately 0assurance thatthefirewillFactoryMutualhaspublished'

standard, "LossPrevention Data"Section1-45whichappliestoairductsystems.Theobjectives ofthestandardare:(1)"Torestrictthespreadoffire,smoke,andheatthroughair-conditioning systemsfromonefireareatoanotherorintoabuildingfromoutside.Page9-243 (2)Tomaintainthefireresistive integrity ofelements, suchasfloors,walls,andcolumnsbytheductsysteminstallation, byminimizing sourcesandcombustibility oftheelementsofsystem.buildingaffectedignitiontheduct(3)Todiscusstheuseofairductsystemsfortheadditional purposeofemergency smokecontrol."

Thestandardprovidesdesignguidanceandrecommendations forductsystemsincluding locationandminimumdesignrequirements forfiredampers.Inreviewing theFactoryMutualSystemspecifications Section1-45"LossPrevention Data,"Page'l3,Item2,under"Recommendations" states:"Wherever ductspassthroughinteriorfirecutoffs,of

.three-hour ormorefireresistance ratings,openings18in.(455mm)ormoreindiameteror'onlongestsideshouldbeprotected byadoorarrangement havingan,overall,firerating'fthreehours.Atopeningsinsuchcutoffsnotexceeding 18in.(455mm)indiameteroronlongestside,1/8in.(3.2mm)steelplatesmaybeused."Thefieldconstructed dampersarelocatedinductswhichgothroughawallpenetration thatislessthan18in.indiameter.

Thedampersareconstructed of3/8in.thicksteelplate.TheymeettheFactoryMutualrequirements forprotection of.openings notexceeding 18in.in.diameterlocatedinbarriersrequiredtohaveathree-hour firerating.Basedonthisguidance, theexisting3/8-in.thickfusible-link actuatedsteelplateprovidesadequateprotection fortheventilation openinginthePage9-244 IbarriercommontoFireZone7andFireZone61.Therefore, the--boundary barri:erbetweenFire-Zones7and61canbeconsidered asafireareaboundary.

Conclusion Basedonthepreviousevaluation, theexistingfieldfabricated fusiblelinkactuatedguillotine-type damperslocatedbetweenFireZone7andFireZone61isanacceptable deviceformaintaining theratingofthefireareaboundary.

Inaddition, thisevaluation doesnotadversely impactonotherevaluations orexemption requestscontained inthisreport.Thebaseswhichjustifythisconclusion aresummarized asfollows:(1)Theexisting.dampermeetstherequirements oftheFactoryMutualSystemspecifications.

forfire:dampers."

(2)FireZone7presently isprovidedwithanautomatic carbondioxidesuppression system.whichwouldquickly-extinguish afireinthisarea.FireZone61hasbeenprovidedwithanautomatic smokedetection system,manualfirefightingequipment locatedoutsidethezoneandhasanequivalent fireseverityofunder20minutes.(3)SinceFireZgne.61hasacombustible loading.under27,000Btu/ft(under20minutesfireseverity) thisareaisnotaprimarysourceoffire.(4)FireZone5,whichistheonlyadjacentfirezoneto61withinthesamefirearea,isprovidedwithautomatic firedetection andsuppression andhasanequivalent fireseverityoflessthan20minutes.(5)Replacing theexisting3/8-in.thicksteelplatedamperswithathree-hour-rated damperswouldnot'nhance theprotection providedbytheexistingconfiguration.

Page9-245 9.41FireZones37and51HVACDuctPenetrations

~PuroeeeIThepurposeofthisevaluation istoanalyzetheimpactonIsafe'shutdown capability dueto15undampered HVACpenetrati'ons connecting the617ft'and'633ftelevations oftheAuxiliary Buildingbetween.Fire'ones

.37and51.'naddition, thisevaluation will'lsoverifythatthereisnoadverseimpacttootherevaluations orexemption requestscontained inthisreport.Eachofthefifteenundampered HVACducts(8"indiameter) p'rovideexhaustairforthedemineralizer tankcubicleslocatedonthe617,ftelevation oftheAuxiliary BuildinglocatedinFire'Zone37,Fire'Zone 37".i:spartofthefireareadefinedbyFireZones37,'.43,4'4A,44B;44C,.44D,44E,44F,44G,44H,44N,and4'4S.!Eachofthedemineralizer tankcubicleshasanundampered (8"diameter) supplyductpenetrating from.the609ftelevation ofFireZone44NbelowandintothelowerportionofeachcubicleinFireZone37.Noductworkisprovidedwithinthecubiclesthemselves.

Ductsor'iginate attheceilingovereachtank,riseapproximately vertically, andenteracommonexhaustheaderlocatedonthe633ftelevation oftheAuxiliary BuildinginFireZone51.,FireZone51ispartofthefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146.Thecommonexhaustductthentraverses throughFireZone51Page9-246 toFireZone52,onthe633ftelevation oftheAuxiliary Building.

Airfromthisductisnormallyexhausted fromtheAuxiliary Buildingbytwoexhaust=fans(2-HV-AX-1,2).

SafeShutdownEuimentFireZone51islocated.onelevation 633ftandiscontained inthefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146.Safeshutdownequipment islocatedi:nFireZones50,52,69,106,and107.Theequipment includes1-CM0-429, 2-CMO-429 (CCWtoRHRheatexchanger isolation MOV),1-CCW-214, 1-CCW-220, 2-CCW-214, 2-CCW-220 (CCWsurgetankmanualisolation valves),MCCs1-AM-A,2-AM-A,l-AM-D,2-AM-D,batterydistribution cabinetDCN(Unit1andUnit2)andbatteries associated withturbine-driven AFWpumps.Various4cablesarelocatedinFireZones32,50,51,52,69,106and107.FireZones3,31,35,36,48,49and146donotcontainanysafeshutdownequipment and/orcables.Basedonthesafeshutdownsystemanalysis, intheeventofafireinthisarea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoring instrumentation.

However,theMarch1983submittal recommended theadditionofanalternate sourcerangeneutronmonitoring channeltoprovide'ndication atlocalshutdownpanelLSI-4locatedinFireZone5.FireZone37islocatedonelevation 617ftandiscontained inthefireareadefinedbyFire.Zones37,43,44Athrough44H,Page9-247 44Nand44S.Thisfireareacontainsvarioussafeshutdownmotorcontrolcenters,pumpsandredundant cables.Asrecommended inSection8ofthisreport,variousmodifications willbemadeinthisfireareatoensuresafeshutdowncapability.

FireZone37containsnosafeshutdownequipment and/orcables.FireProtection EuimentThefireareadefinedbyFireZones37,43,44Athrough44H,44N,and44Scontainsautomatic detection inFireZones37(outsideofthedemineralizer cubicles),

43,44Nand44S.Automatic drypilotpr'eaction sprinklers, including protection ofstairways toadjacentelevations, areprovidedinFireZones.44Nand44S.ThefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146containsautomatic detection inFireZones32,48,49,50,51,52,69,106and107.Onlypartialcoverageisprovided.inFireZone3.Nodetection coverageisprovidedinFireZones31,.35,36and146.Thermistors arealsoprovidedforthecharcoal-filter unitsinFireZones49,50and69.Automatic drypilotpreaction sprinklers arecontained inFireZones32,51and52withpartialcoverageprovidedinFireZone3.AmanualdelugesystemisusedforthecharcoalfilterunitsinFireZones49,50and69.FireHazardsAnalsisTheabovefire'reashaveequivalent'ire severities asindicated bythefollowing:

Page9-248 FireAreaorFireZonesComosinaFireAreaAreaFireSeverity(Minutes)

FZs3,32,36,48,49,50 51,52,69,106,107,146 25FZs37,43,44A through44H,44N,44S 35Inorderforafiretoaffectbothfir'eareas,afirewouldhavetostartinFireZone37orpropagate fromFireZone44Nto37.ThefirewouldhavetothentravelthroughtheexhaustductsofFireZone37toFireZone51.FireZones44Nand37(outsideofthedemineralizer cubicles) areprovidedwithautomatic detec-ti:onsystems.Aspreviously stated,FireZone44Nisprovidedwithanautomatic drypilotpreaction suppression system.There-fore,ifafirewastost,artin44N,itwouldmostlikelybeextinguished initsincipient stagesbeforesmokeandhotcombus-tiblegascouldtravelthroughFireZone37toFireZone51.However,ifhotcombustible gasandsmokeweretotraveltoFireZone37,entertheindividual demineralizer

cubicles, andthenspreadintotheundampered commonexhaustductinFireZone51above,normallyone.ofthetwoUnit2Auxiliary Buildingexhaustsystemventilation fanswouldexhaustthesmokeandgas.Aspreviously discussed, FireZones50.,51,52,106and107aretheonlyfirezonesinthefireareacontaining safeshutdownequipment and/orcables.Thesefirezonescontainautomatic detection systemsforgeneralareadetection, withthermistors andamanualdelugesystemalsoprovidedforthecharcoalfilterPage9-249 unitsinFireZones49and50.FireZones51and52are<<protected byautomatic, drypilotsprinkler systems.Thisfire-areahasanequivalent fireseverityoflessthan25minutes.-(Theactualfireseverityexistingatthistimeisunder12.9-minutes.)

Shouldtheproductsofcombustion escapetheductandenter;FireZone51or52,reasonable assurance isprovidedthatthefireprotection systemswoulddetectandacttoextinguish thefire.Therefore, transmission offirebetweenthetwofireareasisnotacredibleevent.-SstemsAnalsisTheabovefirehazardsanalysisdemonstrates thatitis,-extremely unlikelyforafiretopropagate totheadjoining fireareasatvariouselevations.

'singtheabovescenarios asa-basis,asystemsanalysiscanbeperformed todetermine the.impactofafireonthesafeshutdowncapability oftheplant.Forthepurposesofthisanalysis, thefollowing assumptions areused:(1)Theexhaustductisacommonfiretobothofthefirehowever,itisnotcrediblefireareasaresimultaneously meansofcommunication ofareasdescribed above;thatbothoftheentireengulfedbyfire.(2)Considering

'assumption (1)above,theworst-case scenarioisdefinedasafiretotallyengulfing eitheroneofthefireareas.Thefirewouldthentravelthecircuitous path,described inthepreviousscenarios, inoneoftheadjacentfireareasuntilthefirereachesafirezonewithinthefireareacontaining a.detection andsuppression systemcapableofdetecting andextinguishing thefire.Page9-250 (3)Itisassumedthatthefirestartsatthe609ftelevation oftheAuxiliary Building(FireZone44N)andthentravelsthroughtheverticalportionoftheHVACducttotheunratedpenetrations intoFireZone37.Itwouldthenhavetoentertheexhaustductconnecting tothecommonheaderinFireZone51.ForthepurposesofthisanalysisitisassumedthatthefirewillinvolvethefireareadefihedbyFireZones37,43,44Athrough44H,44N,and44S,alongwithFireZone51or52.However,sinceIII.G.2separation hasbeenestablished.

betweenFireZones44Nand44Sbothofthesefirezoneswillnotburnsimultaneously.

Asaresult,thesystemsanalysisassumesalossofsafeshutdowncomponents (i.e.,equipment

'and/orcables)onlyinFireIIZones37,43,'4A,through 44H,'nd,44NalongwithFireZone51and/or52.'orboth.theUnit1andUnit.2systemsanal'yses, itwasIIconcluded thatatleastonepathofsafeshutdowncomponents existsforeachsafeshutdownsystems.Thisevaluation fortheabovefireareasandfirezonesdoesnotaffecttheexistingexemption requestsconcerning theAuxiliary BuildingHVACDuctPenetrations (Section7.13)ortheContainment SeismicGaps(Section7.14).Conclusion Basedonthepreviousanalysis, reasonable assurance canbeprovidedthatafirestartingfromFireZones37,and/or 44Nandpropagating throughtheundampered ductstoFireZone51and52Page9-251 willnotadversely impactonsafeshutdowncapabilities oftheplant.Inaddition, thisevaluation doesnotadversely impactonotherevaluations

.orexemption requestscontained inthisreport.Thebasesfortheaboveconclusion aresummarized below:1I(1}Smokeandhotcombutibl'esenteringanyofthe15exhaustductswouldnormallytendtobeexhausted throughtheengineered safeguards systemsouttheUnit2plant,vent.(2)Smokeand.hotcombustibles enteringanyofthe15exhaust.ducts'ouldtendtoaccumulate inthehorizontal sectionsofthecommonexhaustheaderinFireZones51and52,wh'enthefanunitsarenotrunning.Thehotsmokewouldhavetoresultintheignitionofcombustible materialin'itherFireZone51and/or52'nordertospreadtoadjacentfirezones.Due"toexistence

'oftheautomatic detection andsuppression systemsinFireZones51and52,thisisnotconsidered acredibleevent.(3)(4)Detection'arid su'ppression systemsexistintheadjacentfireareastothe15exhaustductswherecombustibles exist.Afireinvolving Fire'Zones 37,43,44Athrough44H,and44N,alongwith51and/or52,hasbeenconsidered intheabove,fireprotection analysis.

Afireinvolving thesefirezoneswillnot'jeopardize thesafeshutdowncapability oftheplant.*1Page9-252 62?660907666350609'ONPEGIAP.HATCHWIREMESHGATECMO-4I9STAIRS-WOEMESHGATPASSENGER VFREIGHTEIEUAIORELEVA'TOR yI!iII$/F.Z.No.44EJFZNL44FII[rL+'obxVOLUIIECONTROLTANKRAMPUPUPTOELEV.433RHIZSEIRV3IOIMO3I4HE~ITEICM3III.TORRHl28WIRV'320IMO'322ICM32IHE~ITWIMO324~F2No39SECTIONA-AUPlllIUlWMOT3Z~CMO4IOwwra+Lj=PHE.15ECCWPUMPAREACMO4IOD4P2-PPIOESPARE9ILMONITORTANKS-.ot.bkr2~.

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