ML17334B048

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: ML17326B286 ML17334B048
References
NUDOCS 8702190215
Download: ML17334B048 (994)

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AMERICANELECTRICPOWERSERVICECORPORATIONINDIANA&MICHIGANELECTRICCOMPANYD.C.COOKNUCLEARPLANTSAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONS10CFR50,AppendixR,SectionI'II.GTABLEOFCONTENTSSECTIONINTRODUCTION~~~~~~~~PAGE~~~~~~~~~~~111.11:21.2.11.31.41.4.11.4.2TABLEPurposeofReportExecutiveSummaryResultsofAnalysisScopeofReportDefinitions,AcronymsandAbbreviDeflnltlons~~~~~~~~~~~~~~~~~~~~~AcronymsandAbbreviations~~~~~~~~~~~~~~~~at~~~~~~~~~~~~~~~~~~~~~~~~~~lons~~~~oo~~~~~~~~~~~~~~~~~~~~~~~~~l-l1-21-61-61-10.1-101-14AppendixR'SummaryComplianceTable2.IDENTIFICATIONOFFIREAREAS...........;....;........2-12.12.22.32.42.52.6TABLES2-12-22-3FIGURESackgroundBIdentificationofFireZonesIdentificationofFireAreasProcedureforUpdatingCombustible'LoadingSupplementalInformationtoSupporttheContentionthatCablesinConduitEmbedded'nConcretearenotPartoftheFireAreaIdentificationofMaximumAllowableCombustibleLoadingK1FireZoneIdentificationTableFireProtectionFeaturesforFireAreasMaximumAllowableCombustible'oading'-12-32-52-112-13~~~~'~~~2172.12.11FireAreaandZoneIdentification2.0-aEmbeddedConduit2.0.bEmbeddedConduit1287021902CK05000821'7021~pDRF SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued).SECTIONPAGE3.DETECTIONANDSUPPRESSION.SYSTEMS3-13.13.1.13.1.23.23.2.13.2~2.3.2.2.13.2.2.2.,3:33.2.2.4FireDetect,ionSystemsGeneralSystemInformationSystemDescriptionsFireSuppressionSystems......;...GeneralSystemInformationSystemsDescriptionWater'uppressionSystemsCarbonDioxideSuppressionSystemsHalonSuppressionSystemsPartialZoneorAreaCoverage~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~l'~~~~~~~~~~~~~~~~~~~~~~~~~~~3-13-13-23-43-43-53-53-93-103-11-FIGURES3-1.3-23-33-43-53-,6DetectionDetectionEl.591'etectionDetectionand620'etectionDetectionandSuppressionandSuppressionand587'ndSuppressionand,Suppression-6"to625'-10"andSuppressionandSuppressionementMezzanineFlooPlanEl.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'OMPONENTSMETHOD"OFINVESTIGATIONIntroductionDesignBasisEventsSafetyFunctions,................,ReactivityControlReactorCoolantMake-upControlReactorCoolantPressureControlReactorHeatRemovalProcessMonitoringMiscellaneous.Supporting..FunctionDiscussionANDCIRCUITS~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~4-14-1'4-24-24-34-34-34-44-44-411 SAFESHUTDOWNCAPABILITYASSESSMENT,"PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(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....,.4-244-27...."4-30....,..4-32~~~~r433~~~~~~~~~~~~e~~4-59AnalysisofSafeShutdown.S)8ttemS,.",,...'.."...I+,....InitialAssumptionsD~rSafeShutdownFunctionsReactivityControlFunction'..'...,".,>.'.'...',',.'......ReactorCoolantMake-upCon'tr61ReactorCoolantPressureCoqftrgl..'",.:.'...'.",ReactorHeatRemovalFuhctibn,'..".'...,.',;.".',."...'.'.ProcessMonitoringFunctioh.';.;*.......SupportingFunctionsSafeShutdownSystemsChemicalandVolumeControl.,gyytem..(CVCS)ReactorCoolantSystemMainSteamSystemsAuxiliaryFeedwaterSystem"...J-."-"~'~.'-.~~~~~ResidualHeatRemovalSyl'tern.'."."..',..,ComponentCoolingWaterSySteih">.'.'....;.;~",,......EssentialServiceWaterSystem@.'..;."..'...'<...,.....EmergencyPowerSystemIdentificationofSafeShutdo&'h"SPA'Rein"Components.........................................4-40IdentificationofSafeShutdownCircuitsandCables.................,............,<...,...-,.........4-43AssociatedCircuitsofConceI'n;..'.,'>,'...'..'"...',.',>........4-44IntrOductlone..eeee...~~~e~eeee.e~~eeeee"eeeee',~~e~~~e4-44IdentificationofAssociatedCircuits,of,CommonPowerSupplyandComfnbn,En'eloSQr'6:;;;....'4-45SpuriousOperationAnalysis.';".'.",...,....'.',,,....4-47SupplementaryInformation'elat'ed."",",tt,0Table4-3':......~..~~r..-.'-'.'.'..:...."..',453IdentificationofSafedhutddvn'Equi)neat-"Q'ag]eaandRacewayswithinFi'ze;Zone"9ovnd)rie's-".':,.......':"4-56Evaluationofthe'eparation'of'"Saf'e,-ShutdownSys'em(SSS)CofnpO'negtSan'6Cabe0;...':"4-57PhysicalInspections...'....';.";.";..".".',,';."..",,'...'....;:.'.4-59IdentificationofAreas'fC'onformanca/'""'"NonconformancewithAppendixR,SectionIII.G SAFESHUTDOWNCAPABILITYASSESSMENTgPROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONTABLES4-14-24-3SafeShutdownComponents,Unit1SafeShutdownComponents,Unit2PotentialSpuriousMalfunctionsThatCouldAffectSafeShutdownPAGEFIGURES4.24.34'4.54.64.74.84.94.104.114.124.134.144.154.164.174.184.19.1.4.19.24.20SafeShutdownFunctions(SSF)RCSReactivityControlSafeShutdownFunctions-RCSMakeupControlSafeShutdownFunctions-RCSPressureControlSafeShutdownFunctions-ReactorHeatRemovalSafeShutdownFunctionsSupportingSystem'nteractionDiagramUnit1-Main.SteamSafeShutdownFlowPath(SSFP)Unit1-MainSt'earnSafeShutdownFlowPathUnit1-FeedwaterSafeShutdownFlowPathUnit1-FeedwaterSafeShutdownFlowPathUnit1-EssentialServiceWaterSafeShutdownFlowPathUnit1-ReactorCoolantSystemSafeShutdownFlowPathUnit1-ReactorCoolantSystemSafeShutdownFlowPathUnit1-.ChemicalandVolumeControlSystem(SSFP)Unit1-ChemicalandVolumeControlSystem"(SSFP)IntentionallyDeletedUnit1-ComponentCoolingWaterSafeShutdownFlowPathUnit1-ChemicalandVolumeControlSystemSafeShutdownFlowPathUnit1-ResidualHeatRemovalSafeShutdownFlowPathUnit1-EmergencyPowerSourceSafeShutdownFlowPathUnit1-EmergencyPowerSourceSafeShutdownFlowPathUnit1-EmergencyPowerSystemSafeShutdownFlowPath(OneLineDiagram)

SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONPAGE4.214.224.234.244.254.264.274.284.294.304.314.324.334.34Unit1-EmergencyPowerSystemSafeShutdownFlowPathUnit1-EmergencyPowerSystemSafeShutdownFlowPathUnit1-EmergencyPowerSystemSafeShutdownFlowPath(OneLineDiagram)SafeShutdownFunctionalBlockDiagram-MainSteamSafeShutdownFunctionalBlockDiagram-AuxiliaryFeedwaterSafeShutdownFunctionalBlockDiagram-EssentialServiceWaterSafeShutdownFunctionalBlockDiagram-ReactorCoolantSystemSafeShutdownFunctionalBlockDiagram-ChemicalandVolumeControlSystemSafeShutdownFunctionalBlockDiagram-ComponentCoolingWaterSafeShutdownFunctionalBlockDiagram-ReactorHeatRemovalSafeShutdownFunctionalBlockDiagram-EmergencyPowerSystem(1/3)SafeShutdownFunctionalBlockDiagram-EmergencyPowerSystem(2/3)SafeShutdownFunctionalBlockDiagram-EmergencyPowerSystem(3/3)PressurizerPORVElectricalSchematicALTERNATIVESHUTDOWN.................,................5-15.15.25.2.15.2.25.2.35.2.45.2.55.2.65.2.75.2.8Introductiono~~~~o~~~~~~o~~~o~o~~~~~~~~~~AlternativeShutdownSystemDescriptionChemicalandVolumeControlSystemAuxiliaryFeedwaterSystemEssential.ServiceWaterSystemComponentCoolingWaterSystemMainSteamReactorCoolantSystemEmergencyPowerSystemResidualHeatRemoval~~~~~~~~~~~~5-15-35-75-85-85-105-115-125-125-14 SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONPAGE5.35.3.15.3.25.3.35.3.45.3.55.45.55.5.15.5.25.5.35.5.45.5.55.5.65.5.75.5.85.5.95.5.105.65.6.15.6.25.6.35.6.45.6.5AlternativeShutdownMethodsMethodASlMethodAS2MethodAS3MethodAS4MethodAS5DetailedResponsetotheNRCClarificationsofGenericLetter81-12AlternativeShutdownModificationsCVCSCross-txeAlternatePowertoLSIPanelsESWPumpCircuitModificationsESWStrainerandValveCircuitModificationsCCWPumpCircuitModificationsNewThandTcforLSIPanelsNewSGPressureforLSIPanelsNewSRMforLSIPanelsNewCentralizedControlPanels-LSI-4PermanentCableforPressurizerBackupHeaterRepoweringSummaryofProceduresUsedforAlternativeShutdownInitialHotStandbyLong-TermHotStandbyHotShutdownColdShutdownAlternativeShutdownSystemTechnicalSpecxficatlons~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.....5-35TABLES5-15-~-75-85-9AlternativeShutdownMethods/FireZoneMatrixNormalShutdownEquipmentAffectedbyaFireWhichRequires'OperationPost-FiretoSupportMethodsASlthroughAS5ESWandCCWPumpSSSCablestobeIsolatedESWSystemSSSCablestobeRemoved SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(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-6SafeShutdownFunctionsAlternativeShutdownFigures5.1-5.4RCSReactivityControlRCSMakeupControlRCSPressureControlReactorHeatRemovalUseofUnit2SystemsasAlternateShutdownSystemforUnit1OperationFigures5.5-5.8UseofUnit2CVCSandProposedCross-TieUseofUnit2Motor-DrivenAFWasAlternateShutdownSystemUseofUnit2Motor-DrivenAFWasAlternateShutdownSystemUseofUnit2ESWasAlternateShutdownSystemforUnit1UseofUnit2ESWasAlternateShutdownSystemforUnit1Unit2RHRComponentCoolingWaterCross-TieasAlternativeShutdownSystemDuringUnit1RHROperationN2SupplyforEmergencyOperationofS.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-TiePipingDiagramOne-LineDiagramforProposedPowerSourcestoUnit1LSIPanelsOne-LineDiagramforProposedPowerSourcestoUnit2~LEPanelsLSI.PanelPowerSupplySchematic(Typical)Unit2PumpCircuitShown(TypicalforallESW'umps)

SECTION5.14.25.14.35.155.165.175.185.19.15.19.25.19.35.205.21.1,5.21.2,5.21.35.22SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)Unit,lESWPump.CircuitShown(TypicalforallESWPumps)Unit1ESWPumpCircuitShown(TypicalforallESWPumps)ESWPumpSchematic(Typical)ESWPumpDischargeValveSchematic(Typical)ESWPumpStrainerSchematic(Typical)ESWCross-TieValve(Typical)LSIInstrumentationLSIInstrumentationLSIInstrumentationProposedUnit1SRMInstrumentationExistingLocalShutdownInd.CabinetsExistingLocalShutdownInd.Cabinet1-LSI-4(Unit1)2-LSI-4(Unit2)AlternatePowerSourceforUnit1PressurizerHeatersPAGE6.REPAIRSANDCOLDSHUTDOWNOPERABILITY......................6-16.16.26.2.16.2.26.36.3.16.4IntroductionPressurizerHeatersRepoweringofPressurizerHeatersProceduresandMaterialforPressurRepoweringRepoweringofRHRPumpsProceduresandMaterialsforRepowePumpConclusions~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~izerHeaterringofRHR6-16-36-36-66-76-86-97.EXEMPTIONREQUESTSANDANALYSES7-17.17.27.2.17.2.27.2.37.2.4IntroductionRHR/CTSPumpArea,AuxiliaryElevation573ftAreaDescriptionSafeShutdownEquipmentFireProtectionSystemsFireHazardsAnalysisBu~~~~ilding7-17-77-77-97-97-10 SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONPAGE7.2.57.2.5.17.2.5.27.2.5.37.2.5.47.2.5.57.2.6ProposedModificationsVentilationDuctsPenetrationsAreaDetectionRHRPumpPowerCablesStairwayConclusiono~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-12.7-127-137-137-137-147-14TABLE7.2-17.37.3.17.3.27.3.37.3.47.3.57.3.6SummaryEvaluationTableFireArea14TransformerAreaDescr'iptionSafeShutdownEquipmentFireProtectionSystemFireHazardsAnalysisProposedModificationsConclusion....,o.....~oRoomUnit1~~~~~~~~~~t~~~~~~~~~~~~~~~t~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-167-197-197-197-207-207-217-21TABLE7.3-17.47.4.17.4.27.4.37.4.47.4.57.4.6SummaryEvaluationTableFireArea20TransformerRoomElevation591'ftUnit2AreaDescriptionSafeShutdownEquipmentFireProtection,SystemFireHazardsAnalysisProposedModificationsConclusion,,i~~~~~~~~~~~~~~~~~~~7-227-247-247-247-257-257-267-26TABLE7.4-17.57.5.17.5.27.5.3SummaryEvaluationTablentialCenteFireZone29(A,B,E)Unit1EsseWaterPumpsandMotorControlAreaDescriptionSafeShutdownSystemsFireProtectionSystemsServicerso~~~~~~~~~~~~~7-277-297-297-307-30

/SAFESHUTDOWNCAPABILITYASSESSMENT~PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONPA'GE7.5.47.5.57.5.6FireHazardsAnalysisProposedModificationsConclusion~~~~~~~~~~~~~~~~~~~~~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-317-327-32TABLE7.5-1SummaryEvaluationTable7-347.67.6.17.6.27.6.37.6.47.6.57.6.5.7.6.5.7.6.5.7.6.6FireZone29(C,D,F)UniWaterPumpsandMotorAreaDescriptionSafeShutdownSystemsFireProtectionSystemsFireHazardsAnalysisProposedModifications1DetectionSystem2LadderHatch3VentilationDuctsConclusiono~o~~~~~~~~~t2EssControtialServiceCenters...............en1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~t~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~7-367-367-377-377-387-397-397-397-397-40TABLE7.6-1SummaryEvaluationTable..............................7-417.77.7.17.7.27.7.37.7.47.7.57.7.5.7.7.5.7.7.5.7.7.5.7.7.6TABLE7.7-11234FireZone29GScreenhouseAuxiElevation575ft,BothUnitsAreaDescriptionSafeShutdownEquipmentFireProtectionSystemsFireHazardsAnalysisProposedModificationsFireDetectionHatchCondu1ts~~~~~~~~~~~~~~~~~~~~~PumpPowerandDischargeValveConclusion~~~~~~o~~~~~~i~~~~.SummaryEvaluationTableliary'MCCRoom~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~t~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~1~~~t~~~~~~~~~~~~~~~tsCondui~~~~~~~~~~~~~~~~~~~~~~~~7-437-437-447-447-447-477-477-477-487-487-487-50 SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSED'MODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(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,33Band105Unit1EastMainSteamValveEnclosureandContractorAccessControlBuildingFireAreaDescriptionSafeShutdownEquipmentFireProtectionSystemsFireHazardsAnalysisProposedModificationsFloorGratePenetrationsFireDetectionConclusion7-527-527-527-537-537-547-547-547-547-55'TABLE7.8-17.97.9.17.9.27.9.37.9.47.9.57.9.5.17.9.5.27.9.5.37.9.6SummaryEvaluationTableFireArea34,34A,34BUnValveEnclosureFireAreaDescriptionSafeShutdownEquipmentFireProtectionSystemsFireHazardsAnalysisProposedModificationsFloorGratePenetrationsFireDetectionConclusionit2EastMainSteam7-567-587-587-587-597-597-607-607-60.7-607-60TABLE7.9-17.107.10.17.10.27.10.37.10.47.10.57.10.5.17.10.5.27.10.5.37.10.5.47.10.6SummaryEvaluationTableFireZone.44SAuxiliaryBuildingElevation609ft,BothUnitsFireZoneDescriptionSafeShutdownEquipmentFireProtectionSystemsFireHazardsAnalysisProposedModificationsWaterSuppressionSystemFireBarrierFireDetectionFireDampersConclusion~~~~~~~~~~~~~~~~~~~~~~South,~~~~~~~~~~~~~~~~~~~~~7-627-647-647-667-667-677-687-687-707-707-717-71xi SAFESHUTDOWN"CAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTIONPAGETABLE7.10-17,117.11.17.11.27.11.37.11.47.11.57.11.5.17.'11.5.27;-11.5.37<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=-TableJiFireArea53Unit1ControlFireAreaDescriptionSafeShutdownEquipmentFirePrcrt'ection'SystemsFireHazardsAnalysisProposedModificationsFloorandCeilingHatchesConnecting'-Dobr':..........HotShutdownPanelConclusion""i-'a.i.4.'...~~SummaryEvaluationTableFireArea5'4'Unit2ControlFi:reAie'a'DiscVipti6nSafe'ShMdbwn.EquipmentFireProtectionSystemsFire~HazardsAnalys.is-.....Proposed.Mo'difiCationsFloor-ndCeili'ngHÃtchesConnectingDoorVentilation"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.'nTable\7.13P'util.iargiBuli,Ming.HVACDuctPene~~~~~~~~~~~~\~~~~~~~~trations7-877-89TABLES7.13-1~6AirRegisterLocation7.14ContainmentSeismicGaps7-107 SECTIONTABLES7.14-1-17.14-1-27.14-2-17.14-2-2FIGURESSAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)Unit1FireAreas/ZonesProtectedbyAutomaticC02SuppressionUnit2FireAreas/ZonesProtectedbyAutomaticC02SuppressionUnit1FireAreas/ZonesofConcernUnit2FireAreas/ZonesofConcernPAGE7.27.37.47.5.17.5.27.5.37.6.17.6.27.7.17.7.27.7.37.87.97.10.17.10.27.10.37.10.47.10.57.10.67.10.77.10.87.10.97.117.127.13-1~8RHR/CTSPumpAreaAuxiliaryBuildingFireZone1,lA-HTransformerRoomUnit1FireZone.14.TransformerRoomUnit2FireZone20ESWPumpAreasUnit1andUnit2FireZones29,29A,29B,29C,29D,29E,29FESWPumpAreaUnit1FireZone29A&29BESWMCCAreaUnit1FireZone29EESWPumpAreaUnit2FireZone29C,DESWMCCAreaUnit2FireZone29FPlanViewofFireZone29GManualFirefightingEquipmentAvailableforZone29GFirefightingEquipmentLocatedinZone29GEastMainSteamEnclosureMainSteamPipingandWestNESWPipingAreaUnit1FireZones33,33A,33BEastMainSteamEnclosureMainSteamPipingandWestNESWPipingAreaUnit2FireZones34,34A,34BAuxiliaryBuildingGeneralOutlineofFireZones44N,44SZone44S-SouthEndAuxiliaryBuildingCCWPumpsProposedFireBarrierLocationFireZone44SPlanandElevationofCeilingLedgeinFireZone44SProposedPlanLayoutofSuppressionandDetectionSystemsSchematicElevationViewofDetectionandSuppressionSystemsFireBarrierBetweenComponentCoolingWaterPumpsElevationofCCWPumpFireBarrierFireBarrierBetweenComponentCoolingWaterPumpsControlRoO'mUnit1Zone53ControlRoomUnit2Zone.54AirRegisterLocations

'SECTION8.SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS,(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..ConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireZone5EastEndoftheAuxiliaryBuildingBetweentheUnit1andUnit2ChargingPumpCubicles....................................ConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireZones6A,6N,6M,6S,61,64A,,64B,65Aand65BAuxiliaryBuildingElevations587ftand601ftConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea12.Unit1Quadrant2PipingTunnelConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea14Unit1TransformerRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryEvaluationsFireArea15Unit1-DieselGeneratorRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea17CAuxiliaryFeedwaterVestibuleConduitandCableTrayProtectionSuppression.andDetectionFire'Area19-Unit2DieselGeneratorRoomConduitand'ableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea20.Unit2TransformerRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryEvaluations137~~~~~~~~~~~~~~~~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

~~IISAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(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'..."'..'-"...:<."..~...SuppressionandDetection......;".'-;..!.'.:.-...."...BoundaryModifications/Evaluati'ons';';..;..';-.!."'...FireZone29(A,B,E)Unit1ESW.PumpArea':.IncludingtheMCCsConduitandCableTrayProtectionSuppressionandDetection,BoundaryModifications/Evaluations'-..".'..:-..".'......FireZone29(C,'D,F)Unit2ESWPump'Area:IncludingtheMCCsConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/Evaluati'onsFireZone29GUnit1andUnit2Screen'houS'eAuxiliaryMCCRoomConduitandCableTrayProtection"......'.'.'.;.:.'."..SuppressionandDetectionBoundaryModifications/Evaluations'.;.;;FireArea33,33A,33Band105Unit:1-Ea'st.Ma'in'-."SteamValveEnclosure,MainSteam"PipingA'r'ea,WestNESWValveArea,andContractor"-AccessControlBuildingConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea34,34A,34BUnit2'East'MaioliSteam'-ValveEnclosure,MainStea'mPipingArea,-'and:WestNESWValveAreaConduitandCableTrayProtecti'on"SuppressionandDetectionBoundaryModifications/Evaluati:oneFireArea40(AandIB)Unit14kV'SwitcfigearoomsandFireArea41Unit1ESSaidMCCRoomsL~~~~~~~~~L~~~ConduitandCableTrayProtection'.';..~;";A..::.~..SuppressionandDetectionBoundaryEvaluationsFireZone43AccessControlArea~.;i.'-."...:ConduitandCableTrayProtectionSuppressionandDetectionBoundaryEvaluationsPAGE~~~~~~~~~~~~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 SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)SECTION8.168.16.18.16.28.16.38.178.17.18.17.28.17.38.188.18.18.18.28.18.38.198.19.18.19.28.19.38.208.20.18.20.28.20.38.218.21.18.21.28.21.38.228.22.18.22.28.22.38.238.23.18.23.28.23.38.248.24.18.24.28.24.3FireZones44Nand44SAuxiliaryBuildingComponenCoolingWaterSystemAreaElevation609ftConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea47(AandB)Unit24kVSwitchgearRoomsandFireArea45Unit2ESSandMCCRoomsConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireZones49and50Unit1andUnit2HVACVestxbuleConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireZones51and52EastandWestEndofAuxiliaryBuildingElevation633ftConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea53Unit1ControlRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea54Unit2ControlRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFire'Zone57Unit1ControlRoomCableVaultConduitandCableTrayProtectionSuppressionand'DetectionBoundaryModifications/EvaluationsFireZone58Unit2ControlRoomCableVaultConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications/EvaluationsFireArea62(A,B,C)Unit1ChargingPumpAreaandFireArea63(A,B,C)Unit2ChargingPumpAreaConduitandCableTrayProtectionSuppressionandDetectionBoundaryModifications0PAGE8-228-228-238-248-258-258-258-258-258-258-258-268-268-268-268-268-278-278-278-278-288-288-288-288-298-298-298-298-298-298-298-298-298-298-298-30xv1 SECTION8.258.25.18.25.28.25.38'.268.26.18.26.28.26.38.278.27.18.27.28.27.38.288.298.29.18.29.2~8.29.38.308.318.31.18.31.28.31.38.31.48.31.58.328.32.18.32.28.32.3,8.32.4TABLE8-1SAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued).FireZone79Unit1TurbineRoomBetweentheUnit1EmergencyDieselsConduitandCableTrayProtectionSuppressionandDetectionBoundaryModificationsFireZone85Unit2TurbineRoomBetweenUnit2EmergencyDieselsConduitandCableTrayProtectionSuppressionandDetectionBoundaryModificationsFireZone122Unit1ContainmentInstrumentRoomConduitandCableTrayProtectionSuppressionandDetectionBoundaryModificationsFireZone123Unit2ContainmentInstrumentRoomFireZones66,74Units1and2ContainmentPipingAnnulus;FireZones67,75Units1andLowerVolume;FireZones120,121Units1andContainmentAccumulatorEnclosureConduitandCableTrayProtectionSuppressionandDetectionBoundaryModificationsChemicalandVolumeControlSystem(CVCS)ProcessMonitoringSystemRepoweringofExistingLSIPanelsSteamGeneratorPr'essureforLSIPanelsSourceRangeMonitoringatLSIPanelsCentralizedControlRoomPanelLSI-4ThandTcforLSIPanelsESWSystemESWPumpCircuitModificationsESWStrainerandValveCircuitModificationsCCWPumpCircuitModificationsEmergencyPowerSystem(EPS)WrappedRaceways/CablesbyFireZonePA'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 SECTIONSAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(continued)PAGE9.9.19.29.39~49.59.69.79.89.99.109.119.129.139.149.159.169.179.189.199.209.219.229.239.249.259.269.279.289.29BOUNDARYEVALUATIONSFireZone43andFireZone91DuctEvaluationFireArea54andFireZone73DuctEvaluationCCWPumpAirSupplyDuctEvaluation(FireZone44S)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~AuxiliaryBuildingVerticalAirShaftsEvaluation(FireAreas12and22)FireZones70and73HatchEvaluation601ftPipeTunnelEvaluation(FireZone6A)Fire.Area13andFireArea14BoundaryEvaluationFireArea21andFireArea20BoundaryEvaluationFireAreaContainingFireZones3,32,36,48,and69andFireAreaContainingFireZones49,50,51,and52BoundaryEvaluationFireArea43andFireZone44NBoundaryEvaluationUnits1and2TurbineBuilding,MainSteamPipeTunnelsandService/OfficeBuildingEvaluationTurbineBuildingandScreenHouseBoundaryEvaluationFireArea53andFireArea57HatchEvaluationFireZone43andFireArea56HatchEvaluationFireZone40BandFireArea55HatchEvaluationFireArea41andFireArea55HatchEvaluationFireArea54andFireArea58HatchEvaluationFireZone52andFireArea59HatchEvaluationFireArea45andFireArea60HatchEvaluationFireZone47BandFireArea60HatchEvaluationFireZone110andFireZone43DoorEvaluationFireZoneillandFireZone44SDoorEvaluationFireArea116BoundaryEvaluationFireArea117BoundaryEvaluationEssentialServiceWaterPumpHouseHatchandFireDamperEvaluationFireArea9andFireArea10BoundaryEvaluationFireArea24andFireArea25BoundaryEvaluationFireArea61andFireZone5BoundaryEvaluationFireArea105andFireAreas33,33A,33BBoundaryEvaluation9-19-69-109-159-219-459-489-629-679-729-769-809-859-889-939-989-1039-1089-1139-1199-1249-1299-1349-1409-1459-1519-1649-1689-1729-176 SECTIONSAFESHUTDOWNCAPABILITYASSESSMENT,PROPOSEDMODIFICATIONS,ANDEVALUATIONSTABLEOFCONTENTS(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.........................................9-181BoundaryEvaluationofFireZones62A,62B,and62C...9-185BoundaryEvaluationofFireZones63A,63Band63C....9-192FireZone6AtoFireZone138BBoundaryEvaluation....9-199FireZone36toFireZone5BoundaryEvaluation.......9-204FireZone108toFireZone33ABoundaryEvaluation....9-210FireZone109andFireZone34ABoundaryEvaluation...9-217FireZone32toFireZone5BoundaryEvaluation.......9-224FireZone69toFireZones108and109BoundaryEvaluation..........................................9-231FireZone70toFireZone129BoundaryEvaluation.....9-238FireZone7toFireZone61BoundaryEvaluation......9-241FireZones37and51HVACDuctPenetrations..........9-246FIGURES9.3-19.3-29.3-39.6-19.6-29.6-39.6-49.6-59.6-69.6-79.6-89.6-99.6-109.6-119.6-129.6-139.6-149.6-15PlanandElevationofCeilingLedgeinFireZone44SFireBarrierbetweenCCWPumpsElevationofCCWPumpFireBarrier587ftPipeTunnelEvaluation609ftPipeTunnelEvaluationLocationofPipeTunnelSectionA-APipeTunnelEvaluation609ftPipeTunnelEvaluation601ftCeilingPipeTunnelEvaluation601ftFloorPipeTunnelEvaluation601ftWallNo.1PipeTunnelEvaluation601ftWallNo.2PipeTunnelEvaluation601ftWallNo.3PipeTunnelEvaluation601ftWallNo.4PipeTunnelEvaluation601ftWallNo.5PipeTunnelEvaluation601ftWallNo.6PipeTunnelEvaluation601ftWallNo.7PipeTunnelEvaluation601ftWallNo.8PipeTunnelEvaluationX1X 1.INTRODUCTION1.1PuroseofReortThepurposeofthisreportistoidentifythesafeshutdownsystemrequirementsoftheDonaldC.CookNuclearPlant,Units1and2,relativetothefireprotectionguidelinesof10CFR50AppendixR.Forthoseplantareaswherefireprotectionofthesafeshutdownsystemsandtheirassociatedcircuitsarenotin,compliance,analysesarepresentedandmodificationsareproposedforthepurposeofmeetingtheNuclearRegulatoryCommission's(NRC)requirements.Inafewareas,exemptionsarerequestedfromthespecificrequirementsofSectionIII.Gwherecompliancewiththeregulationwouldnotsignificantlyenhancefireprotectionabovethatofpresentcommitments.TheNRCmanagementhasestablishedthatthereportingprocessregardingAppendixRisoneof"ManagementbyException".0ThisprocesssuggeststhatthecontentsofthisAppendixRsubmittalneednotexhaustivelyaddresseveryinstanceofcompliancebyincludingthedetailsofthesupportinganalyses.Rather,itshouldfocusonthemethodsbywhichIndianaandMichiganElectricCompanyhasdeterminedthateither:(1)TheDonaldC.CookdesigncomplieswithorwillcomplywiththespecificrequirementsofAppendixR,SectionIII.G;or(2)ExemptionsarerequestedfromthespecificrequirementsofAppendixRSectionIII.G.Byanalysisandimplementationofproposedmodifications,theleveloffireprotectionwillprovideassurancethatatleastonetrainofredundantsafeshutdownsystemswouldbefreeoffiredamage.Pagel-l R/AEP/1IP1881.2ExecutiveSummarInaccordancewiththeguidancegiveninAppendixR,"...thatlicenseesshouldre-examinethosepreviously.approvedconfigurationsoffireprotectionthatdonotmeettherequirementsasspecifiedinSectionIII.GtoAppendix=R...",adetailed,re-examinationandre-analysisoftheDonaldC.CookNuclearPlant'ssafeshutdowncapabilityhasbeenperformed.Theresultsofthatre-examinationandre-analysis,includedinthisreport,builduponthepreviousfireprotectionactivitiesperformedundertheguidelinesofBranchTechnicalPosition-(BTP)'APCSB9.5-1,theresponsetowhichwassubmittedin1977.There-analysisalsoconsidersothersubsequentfire.improvements,incorporatedintotheD.C.Cookfacility.protectionThisreportreviewsIndianaandMichiganElectricCompany's\DonaldC.CookNuclearPlant,Units1and2(DocketNos.50-315and50-316)safeshutdownsystemsandtheirassociatedcircuitsforcompliancewith10CFR50AppendixR,SectionIII.G.ThisreportalsoincludesthedescriptionsofproposedalternativeshutdownsystemsandprovidessufficienttechnicalinformationtoWpermitNRCStaffreviewandapprovalofproposedplantmodifications.Finally,thoseareasofnoncompliancewiththePprovisionsofAppendixRareidentified,andasubsequent,Psubstantivebasisforequivalentprotectiontothepublichealthandsafetyisdemonstratedthroughdetailedanalysis.Page1-2 R/AEP/1,P188Thisreportwaspreparedinthefollowingmanner.First,aprocessofselectionanddocumentationoflimitingsafetyconsequencesandsafeshutdownsystemperformancegoalswasconductedfortheDonaldC.CookNuclearPlant.Ananalysiswasthenperformedtoidentifyaminimalsetofprimaryandauxiliarysafeshutdownsystemsnecessarytosupportsafeshutdownintheeventofapostulatedexposurefire.Aftertherequisitesystemswereidentified,therelatedcomponentsandcircuits(includingassociatedcircuits)werereviewedforcompliancewiththespecificseparationcriteriaof10CFR50AppendixR,SectionIII.G.2.Forthoseareasnotincompliance,studieswerecompletedtodeterminewhether:(1)Modificationsorchangestoplantfireprotectionorsafeshutdownsystemfeatureswererequiredtobringthezoneintocompliance;or(2)Alternativeordedicatedshutdowncapabilitywasrequiredtobringthezoneintocompliance;or*(3)Anexemptionwasj.ustifiedforthespecificfirezone'inquestion.SubsequenttoissuanceoftheAppendixRMarch1983submittal,thedesignandimplementationoftheproposedmodificationswasbegun.Someoftheproposedfireprotectionmodificationswerereviewedandinsomeinstancesitwasidentifiedthatthemodificationscouldnotphysicallybeimplemented(e.g.,upgradingtheaccesshatchestothree-hourfire-rated).Duringthisperiod,thefireareaboundarieshadalsoundergoneareevaluationprocess.Thisreevaluationidentifiedadditionalareasofconcern.TheseconcernswereevaluatedandotheroptionswereidentifiedinordertobringthePage1-3 R/AEP/1,P188D.C.Cookpowerplantintocompliancewiththerequirementsof10CFR50AppendixR.Thefollowingapproachesweretakentoresolvetheidentifiedareasofconcern:(1),Propose.additionalmodifications(seeSection8).(2)Providejustificationsforexistanceofunratedbarriers,HVACducts,doors,hatchesand/oropenings(seeSection9).(3)Combine-fireareasintoalargerfirearea.Inthesecases,systemsanalyseswereperformedtoensureonetrainofsafeshutdownsystemsremainsunaffected(seeSections2and9).(4)Requestexemptionandprovidejustificationfortheexemption(seeSection7).PortionsofD.C.Cookpowerplantwerenotidentifiedas.firezones=intheMarch1983submittal.Theseareasdonotcontainsafe'shutdowncablesorcomponentsandwerenotincludedinanyidentifiedfireareas.Duringthereevaluationprocess,theseareasweregivenafirezonedesignationandincludedinthepreviouslyidentifiedfireareas.Theresultsoftheseactivities,arelistedinSummaryTable1-.1.ThetableidentifiesthefireareasandfirezonesattheD.C.CookPlant,theapplicableAppendixRprovisions,andthetechnicalapproachesselectedtoachievetheappropriatelevelsofprotection.Tablel-lincludestheunidentifiedfirezones4andpresentsthecondition/statusofeachfirezoneatthetimeoftheMar'ch1983submittal.Tablel-lofthisreportcorrelatestoTablel-loftheMarch1983submittal,buthasbeenreformattedandincludesadditionalinformation.Page1-4 R/AEP/1,P188Theresultsofthisre-analysisandre-examinationcanbesummarizedasfollows:Separationbetweenrequiredsafeshutdowncircuits,whichmeetsthespecificrequirementsofSectionIII.G.2ofAppendixRto10CFR50,existsorwillexistin147ofthefirezonesreviewed.(2)Alternativeshutdown,whichmeetstherequirementsofSectionIII.G.3andIII.LofAppendixRto10CFR50,willexistfor51firezones.(3)(4)TwotechnicalexemptionrequestsweresubmittedsubsequenttotheMarch1983submittal.Theexemptionswere(a)AuxiliaryBuildingHVACductsand(b)ContainmentBuildingseismicgaps.ThreeexemptionrequestsfromthespecificrequirementsofSectionIII.G.2ofAppendixRarerequestedinfirezoneswherezonefeaturesprovideequivalentprotec-tion.(5)EightexemptionrequestsfromthespecificrequirementsofSectionIII.G.3ofAppendixRarerequestedinfirezoneswherezonefeaturesprovideequivalentprotec-tion.(6)(7)AllassociatedcircuitsofconcernhavingaseparationlessthanthatrequiredbySectionIII.G.2ofAppendixRto10CFR50,andhavingacommonpowersourcewiththeshutdownequipment,willbeelectricallyprotectedfromthepost-fireshutdowncircuitofconcernbycoordinatedcircuitbreakers,fusesorsimilardevices.AllassociatedcircuitsofconcernhavingaseparationlessthanthatrequiredbySectionIII.G.2ofAppendixRandhavingacommonenclosure,e.g.,raceway,panel,junctionbox,have'eenadequatelyresolvedbybeingelectricallyprotectedfromthepost-fireshutdown"circuitsofconcernbycircuitbreakers,fusesorsimilardevices.(8)Allassociatedcircuitsofconcernthathaveaseparationfromthefirearea'lessthanthatrequiredbySectionIII.G.2ofAppendixRandhaveaconnectiontocircuitsofequipmentwhose'puriousoperationcouldadverselyaffecttheshutdowncapabilityhavebeenadequatelyresolvedbyappropriateactionpre-orpost-fire.Page1-5 R/AEP/1,P1881.2.1ResultsofAnalsisTheresultsoftheanalysisconfirmtheadequacyoftheexistingfireprotectionfeaturesin13of57fireareaswhencomparedagainstthespecificcriteriaofAppendixR,SectionIII.G.For18ofthe57fi'reareas,proposedmodificationsincludingupgradingoffirebarriers,installationofsuppressionanddetectionsystems,circuitmodifications,cablererouting,trayandconduitwrapping,andpipingmodificationswillachievefirezoneandareacompliancewiththespecificcriteriaofAppendixR,'ectionIII.G.Fortheremaining26fireareas,similarmodificationsareproposedbutverbatimcompliancewithAppendixRFortheseareas,exemptionsarerequested.isnotachieved.Theexemptionrequestsaremadeonthebasisofdetailedfirehazardsanalyseswhichconcludethatexistingfeatures,whencombinedwithadditionalproposedfireprotectionmodifications,providefunctionallyequivalentprotectionofthepublichealthandsafety.TheexemptionrequestsarecontainedinSection7.0ofthisreport.1.3ScoeofReortThisreportcontainsninesections.Section2.0identifiesthefireareasandfirezonesdevelopedtosupporttheAppendixRanalyses.ThisincludesadetaileddiscussionofthedetectionPage1-6 R/AEP/1,P188andsuppressionsystemsandidentifiesthefeaturesprovidedonazone-by-zonebasis.Criteriaforestablishingfireareasandzonesarediscussedaswellastheprocessusedtodeterminethe'ssociatedfirehazardseverity.TheinformationcontainedinSection2generallypresentstheD.C.Cookplantconfigurationofeachfirezoneandfireareaattheendofthe1986Unit2refuelingoutage.Inaddition,thefireprotectionfeaturesincludemodificationsrequiredforcompliancewithAppendixRSectionIII.G,andgeneralplantimprovementsinitiatedatthetimeofissueofthisreport.Section3.0providesadescriptionof-theactivefireprotectionfeaturesincludingdetectionandsuppressionsystems1,atD.C..Cook.The,information,containedinSection.3generallypresentstheD.C.Cookplantconfigurationofeachfirezone'sactivefire,protectionfeaturesat,theendofthe1986Unit2refuelingoutage.Inaddition,thefireprotectionfeaturesincludemodificationsrequiredforcompliancewithAppendixRSectionIII.G,andgeneralplantimprovementsinitiatedatthetimeofissueofthisreport.Section4.0describestheinvestigatoryprocessusedtoidentifysafetyfunctions,safe-shutdownsystems,'omponentsandcircuits,andassociatedcircuitsofconcern.-Relatedassump-,tionsandconsiderationsarealsodiscussed.Theinformation,containedinthissectionpresentstheD.C.Cookplant.status/conditionofthesafeshutdownsystemsandcomponentsattheendofthe1986Unit2refuelingoutage.Page1-7 R/AEP/1,P188Section5.0providesadiscussionofthealternativeshutdownsystemsprovidedbyuseoftheunaffectedunit'ssafeshutdownsystems.Inaddition,Section5.0providesdetailed'esponsestotherelevantquestionscontainedinGenericLetter81-12asclarifiedbytheNRCStaff'sclarificationsdatedMarch22,1982.TheinformationcontainedinthissectionpresentstheD.C.Cookplantstatus/conditionofthesafeshutdownsystems,components,andalternativeshutdownmethodsidentifiedatthetimeoftheMarch1983submittal;however,thesystemflowdiagramsincludedinthissectionpresenttheD.C.Cookplant.;pipingconfigurationattheendofthe1986Unit2refuelingoutage.Section6.0addressesthecoldshutdownrepairsnecessaryto.achievelong-termsafeshutdown.Thelevelsofdamagewhichmay~occurasaresult.ofhypothesizedAppendixRfires,thenormalactionsandrepairsrequiredtoassure,thatcoldshutdowncanbe*achievedandmaintainedwithin72hours,areidentified.TheinformationcontainedinthissectionpresentstheD.C.Cookplantstatus/conditionofthesafeshutdownsystemsandcomponentsattheendofthe1986Unit2refuelingoutage.Section.7.0,containsexempti,onrequests.foreachfirearea/zoneidentifiedasnotbeingincompliancewithSectionIII.GofAppendixR,andforareas/zoneswhereamodificationwouldnotenhancefireprotectionsafety.Eachofthefireareas/zonesisdescribedindetailandafirehazardsanalysis,Page1-8 R/AEP/1,F188includingresults,isprovided.Exemptionsforeachzonearealsoformallyrequestedinthissectionandthedetailedtechnicalbasesforeachrequestareidentifiedattheconclusionofeachanalysis.Tablesandsketchessummarizingsignificantfireareainformationarealsoprovidedattheendofeachsubsection.ExemptionsrequestedinSubsections7.2through7.12utilizetheD.C.-Cookplantcondition/configurationatthetimeoftheMarch1983submittal.Theremainingtwosubsections(7.13and7.14)arebasedontheD.C.Cookplan'tcondition/configura-tionatthetimeofJune1984.Insomeinstances,evaluationswereperformed,tojustifynotimplementingproposedmodifica-tions.TheseevaluationsarepresentedinSection9ofthisreportandarebasedontheconfigurationoftheD.C.Cookplantattheendofthe1986Unit2refuelingoutage;Inaddition,duetoon-goingeffortstocomplywith10CFR50AppendixRandsubsequentgenericNRCclarifications,variousmodi'ficationsinconjunctionwiththeperformanceofengineeringevaluationshaveresultedinrevisionstovariousrequestedexemptions.TheserevisionsarebasedontheexistingconfigurationoftheD.C.Cookplantattheendofthe1986Unit2refueling.outage.Section8.0describesthosemodificationsproposedatD.C.CookNuclearPlantwhichareconsiderednecessaryto:(1)Bringeachidentifiedfirethespecificcriteriaof10III.G;or,zoneintocompliancewithCFR50AppendixR,Section(2).SatisfycertainassumptionsmadeinSection7.0(e.g.,installationofbarriers,thermalshields,conduitwrappings,etc.).Page1-9 R/AEP/1,P188TheinformationcontainedinthissectionpresentstheD.C.Cookplantconfiguration/statusatthetimeoftheMarch1983submittal.Section9.0providesacompilationoffireareaboundaryevaluationswhichhavebeenperformedsince.theissuanceoftheMarch1983report.TheinformationcontainedinthissectionpresentstheD.C.Cookplantconfiguration/statusattheendofthe1986Unit2refuelingoutage.1.4Definitions,AcronmsandAbbreviations1.4.1DefinitionsActiveComonent-acomponentusedtodirectlycontrol(start,regulateorstop)ashutdownorsupportfunction,e.g.,aflowcontrolvalve,'apump,oranormallyclosedisolationorstopvalve.AffectedUnit-asusedindiscussionsofalternativeshutdown,theunitwithoneormoreofitsnormalsafeshutdownsystemsrenderedinoperable,withoutconsideringthecrossconnectsinthefirezoneunderinvestigation.AssociatedCircuitofConcern-safety-relatedandnon-safety-re'latedcablesthatareassociatedwithequipmentwhichisrequiredforshutdownandwhichhaveaseparationfromthefirearealessthanthatrequiredbySectionIII.G.2ofAppendixRto10CFR50,andwhichhaveeither:(1)Acommonpowersourcewiththeshutdownequipmentandthepowersourceisnotelectricallyprotectedfromthe.post-fireshutdowncircuitofconcernbycoordinatedcircuitbreakers,fusesorsimilardevices;orPage1-10 R/AEP/1,P188N(2)Aconnectionofcircuitsofequipmentwhosespuriousoperationwilladverselyaffecttheshutdowncapability,e.g.,RHR/RCSisolationvalves;or(3)Acommonenclosure,e.g.,raceway,panel,junction'box,withshutdowncablesandarenotelectricallyprotectedfromthepost-fireshutdowncircuitsofconcernbycircuitbreakers,fusesorsimilardevicesorwillallowpropagationofthefireintothecommonenclosure.AutomaticDetection-adevicelocated(usuallyattheceiling)inazoneorareathattransmitsasignaltoaremotelocation(usuallytheControlRoom)indicatinganexcesspresenceofcombustionproducts.Severaltypesofdetectiondevicesarecommonlyutilized,suchassmoke(photoelectricandionization),heat(fixedtemperature,rateofrise,oracombinationofboth)andflamedetectors(ultraviolet,)visible,orinfrared).AutomaticSuression-afixedpipingsystemofwaterorotherfireextinguishingagentautomaticallyactuatedwhenthepresenceofcombustionproductsorheatexceedsthesetpointestablishedforthesystemintheareainwhichitisinstalled.ColdShutdown-reactoratzeropower,Kefflessthan0.99andRCStemperatureatorbelow200F.FireArea-thatportionofabuildingorplantseparatedfromotherareasbyboundaryfirebarrierswiththefirehazardineachareaevaluatedtodeterminebarrierfireratingrequirements.Pagel-ll R/AEP/1,P188FireBarrier-acontinuousmembraneeitherverticalorhorizontal,suchasawallorfloor/ceilingassembly,thathasaspecifiedfireresistanceratingtolimitthespread'ffirebetweenfireareasorsafeshutdowncomponents.Thefirebarriersaredefinedtoberatedcommensuratewiththehazardtowhichthebarrierisexposed.fire-fightingandwhoareequippedforandtrainedinthefightingoffires.assemblieshavewithstoodafireexposureasestablishedinaccordancewithtestproceduresofnationallyrecognizedtestingorganizations.propagationalongthelengthofcablesorpreventsspreadingoffiretonearbycombustibleswithinagivenfireareaorfirezone.FireZone-asubdivisionofafireareadesignatedasapotentialfirehazardzoneforconvenienceofanalysisanddesignoffiresuppressionsystems.FixedSuression-,anywaterorgaseoussuppressionsystemactivatedeitherautomaticallyormanually,butexcludingmanualhosestationsandportablefireextinguishers.HotShutdown-reactoratzeropower,Kefflessthan0.99andRCStemperaturebetween350Fand200F.Page1-12 R/AEP/1,P188d,zeropower,Kefflessthan0.99andRCSaveragetemperaturegreaterthanorequalto350F.ManualSuression-afixedorportablemeansofcontrollingorextinguishingafirerequiringmanualactuationand/orapplication.SafeShutdownSstem-asafeshutdownsystemincludesallcomponents,panels,cables,raceways,conduits,etc.,necessaryforthesystemtoperformasafeshutdownfunction.Asafeshutdownsystemisanyofthesystems(e.g.,AuxiliaryFeedwater)whicharerequiredby10CFR50AppendixR.included.NecessarysupportingauxiliarysystemsareSrinklerSstem-anetworkofpipingconnectedtoareliablewatersupplythatwilldistributethewaterthroughouttheareaprotectedandwilldischargethewaterthroughsprinklersinsufficientquantitytoeithercontrolorextinguishafire.Thesystem,usuallyactivatedbyheat,includesacontrollingvalveandadeviceforactuatinganalarmwhenthesystemisinoperation.StandieandHoseSstem-afixedpipingsystemwithhoseoutlets,nozzleandhoseconnectedtoreliablewatersupplytoprovideeffectivefirehosestreamstospecificareasinsidethebuilding.Page1-13 R/AEP/1,P188UnaffectedUnit-asusedinthediscussionsofalternativeshutdown,theunitwhosenormalsafeshutdownsystemswillbeusedtoprovidealternativeshutdownintheaffectedunit.WaterSraSstem-anetworkofpipingsimilartoasprinkler~Isystemexceptthatitutilizesopen-headspraynozzlesandprotectsaspecifichazard.1.4.2AcronmsandAbbreviationsAFW-AuxiliaryFeedwaterAOV-Air-OperatedValveBIT-BoronInjectionTankCCW-ComponentCoolingWaterCST-CondensateStorageTankCVCS-ChemicalandVolumeControlSystemECCS-EmergencyCoreCoolingSystemsEPS-EmergencyPowerSystemESW-EssentialServiceWaterLSI-LocalShutdownIndicationMCC-MotorControlCenterMOV-Motor-OperatedValveMS-MainSteamPORV-Power-OperatedReliefValveRCP-ReactorCoolantPumpRCS-ReactorCoolantSystemRHR-ResidualHeatRemovalRWST-RefuelingWaterStorageTankSV-SafetyValvePage1-14 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLEIIFIREZONEISSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSlIFIREAREA: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 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS=FIREAREACREENHOUSESERVICE/OFFICEBUILDINGSANDTURBINEBUILDING5UNITS1AND2WESTMAINSTEAMVALVEENCLOSURES: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)FIREAREACONTINUEDONNEXTPAGEPAGE2OF16 I~14~

TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTION~AUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONS9596979899100108109110112113114115124125126127128129130131NONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEEXISTINGNONENONENONENONEEXISTINGNONENONENONENONENONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGNONENONENONENONENONENONENONENONEEXISTINGEXISTINGEXISTINGEXISTINGNONEEXISTINGEXISTINGEXISTINGEC(+)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)FIREAREACONTINUEDONNEXTPAGEPAGE3OF16 0TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONS139140141142143NONENONENONENONENONENONENONENONENONENONENONENONENONENONENONEEC(*)EC(4)EC(4)EC(4)EC(+)(5)(5)(5)(5)(5)IIFIREAREA:AUXILIARYBUILDINGELEV.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

TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONE'ETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONSFIREAREA:SAMPLINGROOMELEV.587'":1.5HOURBOUNDARY41EXISTINGNONEEC(0)NONEFIREAREA:AUXILIARYBUILDINGEASTANDWESTELEV.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

TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSSOREVALUATIONSFIREAREA: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:UNIT1TRANSFORMERROOMELEV.591'":1.5HOURBOUNDARY14NONENONEPC,ER(3).(5).(7)FIREAREA:UNIT1CDDIESELROOMELEV.587'-:1.5HOURBOUNDARY151EXISTINGEXISTINGPC(a)(1).(7)FIREAREA:UNIT1ABDIESELROOMELEV.587'":1.5HOURBOUNDARY16EXISTINGEXISTINGEC(9)NONEFIREAREA:UNIT1WESTAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY17ANONENONEEC(9)NONEPAGE6OF16 J

TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)ICFIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSFIREAREA:UNIT2WESTAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY178NONENONEEC(g)NONEFIREAREA:AUXILIARYFEEDWATERPUMPCORRIDOR:3HOURBOUNDARY17CIL2NONENONEPC(g)(1)~(3).(4)FIREAREA:UNIT1EASTAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY170NONENONEEC(g)NONEFIREAREA:UNIT1TURBINEAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY17E1NONEEXISTINGEC(g)NONEFIREAREA:UNIT2TURBINEAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY17FNONEEXISTINGEC(9)NONE.FIREAREA:UNIT2EASTAUXILIARYFEEDWATERPUMPROOM:3HOURBOUNDARY17GNONENONEEC(g)NONEFIREAREA:UNIT2CDDIESELROOMELEV.587'":1.5HOURBOUNDARY18EXISTINGEXISTINGPC(g)(7)FIREAREA:UNIT2ABDIESELROOMELEV.587'":1.5HOURBOUNDARY192EXISTINGEXISTINGPC(a)PAGE7OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSNSOREVALUATIONSFIREAREA:UNIT2TRANSFORMERROOMELEV.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

TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSFIREAREAATERPUMPSAREA:3HOURBOUNDARYESSENTIALSERVICEW29A29B29E29C29029F29G'82NONENONENONENONENONENONENONENONENONENONENONENONENONENONEER(c)ERERERERER(3).(5)(3),(5)(3),(5)(2).(3),(5)(2).(3).(5)(2),(3).(5)(1).(2).(3).(5)FIREAREA:UNIT1EASTMAINSTEAMVALVEENCLOSUREANDCONTRACTORACCESSCONTROLAREA1.5HOURBOUNDAR3333A33B105NONENONENONENONENONENONENONENONEEXISTINGEC(*)ERERER(2).(3)~(5)(3),(5).(6)(3).(5),(6)(5)IFIREAREAUNIT2EASTMAINSTEAMVALVEENCLOSUREAREA:1.5HOURBOUNDARY3434A34BNONENONENONENONENONENONEERFR(2).(3)(3),(5),(6)(3),(6)PAGE9OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSFIREAREA:AUXILIARYBUILDINGNORTHANDSOUTHELEV.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 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSIFIREAREA:UNIT1SWITCHGEARROOMSELEV.609'-:1.5HOURBOUNDARY40A40BEXISTINGEXISTINGEXISTINGEXISTINGECPCNONE(5),(7)FISAFETYSYSTEMSANDMCCROOMELEV.609'":1.5HOURBOUNDARY.411EXISTINGEXISTINGPCFIREAREA:UNIT1EMERGENCYPOWERSYSTEMSAREAELEV.609'":1.5HOURBOUNDARY42A42842C.42DEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGPCPCPCPC(7)(7)(7)(7)FIREAREA:UNIT2ENGINEEREDSAFETYSYSTEMSANDMCCROOMELEV.609'":1.5HOURBOUNDARY45EXISTINGEXISTINGPC(5).(7)-FIREAREA:UNIT2EMERGENCYPOWERSYSTEMSAREAELEV.609'":1.5HOURBOUNDARY46A46B46C46DNONEEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEXISTINGEC(4)PCPCPC(7)(7)(7)FIREAREA:UNIT2SWITCHGEARROOMSELEV.609'":1.5HOURBOUNDARY47A47B~EXISTINGEXISTINGEXISTINGEXISTINGECPCNONE(5),(7)PAGE11OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE~'CONTINUED)FIREZONESSS'QPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REQUIREDMODIFI-CATIONSOREVALUATIONSFIREAREA:UNIT1CONTROLROOM:3HOURBOUNDARY53EXISTINGNONEPC,ER(2),(5),(7)FIREAREA:UNIT2CONTROLROOM:3HOURBOUNDARY54EXISTINGNONEPC;ER(2).(5),(7)IIFIREAREA:UNIT1SWITCHGEARROOMCABLEVAULT:3HOURBOUNDARYI551EXISTINGEXISTINGIFIREAREA:UNIT1AUXILIARYCABLEVAULT: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:UNIT2SWITCHGEARROOM.CABLEVAULT:3HOURBOUNDARY602EXISTINGEXISTINGPC(5).(7)PAGE12OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REOUIREDMODIFI-CATIONSSOREVALUATIONSFIREAREA: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 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)FIREZONESSSEQPTORCABLEWITHINZONEDETECTIONAUTOMATICSUPPRESSIONAPPLICABLEAPPENDIXRPROVISIONSIII.G.2III.G.3REOUIREDMODIFI-CATIONSOREVALUATIONSFIREAREA: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 0TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)LEGEND:NONE182OPECPCERSP,NOSSSCOMPONENTSORCABLESINTHEZONE/NOMODIFICATIONSREQUIREDFORCOMPLIANCEUNIT1SSSCOMPONENTSORCABLESINTHEZONEUNIT2SSSCOMPONENTSORCABLESINTHEZONEBOTHUNITSSSSCOMPONENTSORCABLESINTHEZONEOPTIONALSHUTDOWNCOMPONENTSAND/ORCABLESONLYINTHEZONEEXISTINGCOMPLIANCEPROPOSEOCOMPLIANCEEXEMPTIONREQUESTSPURIOUSCABLESONLY.SEETABLE4-3TYPEOFIII.G.2'OMPLIANCESTRATEGY(a)III.G.2-(a)COMPLIANCE-SEPARATIONOFCABLESANDEQUIPMENTANDASSOCIATEDNONSAFETY-RELATEDCIRCUITSOFREDUNDANTTRAINSBYAFIREBARRIERHAVINGATHREE-HOURRATING.(b)III.G.2(b)COMPLIANCE-SEPARATIONOFCABLESANOEQUIPMENTANOASSOCIATEONONSAFETY-RELATEDCIRCUITSOFREDUNDANTTRAINSBYAHORIZONTALDISTANCEOFMORETHAN20FEETWITHNOINTERVENINGCOMBUSTIBLESORFIREHAZARDS.INADDITION,FIREDETECTORSANDANAUTOMATICFIRESUPPRESSIONSYSTEMSHALLBEINSTALLEDINTHEFIREAREA.(c)III.G.2(c)COMPLIANCE-ENCLOSUREOFCABLEANDEQUIPMENTANDASSOCIATEDNONSAFETY-RELATEDCIRCUITSOFONEREDUNDANTTRAININAFIREBARRIERHAVINGAONE-HOURRATING.INADDITION,FIREDETECTORSANDANAUTOMATICFIRESUPPRESSIONSYSTEMSHALLBEINSTALLEDINTHEFIREAREA.(d)(e)-III.G.2(d)COMPLIANCE-SEPARATIONOFCABLESANDEQUIPMENTANDASSOCIATEDNONSAFETY-RELATEDCIRCUITS,OFREDUNDANTTRAINSBYAHORIZONTALDISTANCEOFMORETHAN20FEETWITHNOINTERVENINGCOMBUSTIBLESORFIREHAZARDS.III.G.2(e)COMPLIANCE-INSTALLATIONOEFIREDETECTORSANDANAUTOMATICFIRESUPPRESSIONSYSTEMINTHEFIREAREA.(f)III.G.2(f)COMPLIANCE-SEPARATION'OFCABLESANDEQUIPMENTANDASSOCIATEONONSAFETY"RELATEDCIRCUITSOFREDUNDANTTRAINSBYANON-COMBUSTIBLERADIANTENERGYSHIELD.(g)III.G.1COMPLIANCEISPROVIDEDSINCENOREDUNDANTSAFESHUTDOWNEQUIPMENTISINTHEAREA(b)III.GCOMPLIANCEISPROVIDEDSINCETHESAFESHUTDOWNEQUIPMENTINTHEAREAISPASSIVEANDISNOTREQUIREDTOOPERATF.(~')III.GCOMPLIANCEISPROVIDEDSINCENOSAFESHUTDOWNCABLESORCOMPONENTSAREINTHEFIREZONE.PAGE15OF16 TABLE1-1APPENDIXRSUMMARYCOMPLIANCETABLE(CONTINUED)TYPEOFMODIFICATIONREQUIREDFORCOMPLIANCE(1)RACEWAYPROTECTION(I.e.,WRAPPINGOFCABLETRAYORCONDUIT)(2)AREABOUNDARYMODIFICATION(3).DETECTIONMODIFICATION(6)(7)(8)SUPPRESSIONMODIFICATIONAREABOUNDARYEVALUATIONAREABOUNDARYEXEMPTIONELECTRICALCIRCUITAND/ORMECHANICALPIPINGMODIFICATIONRATEDBARRIERADDITIONWITHINAFiREZONEBOUNDARY~MODIFICATION(STAIRWAYSUPPRESSION)PAGE16OF16 2.IDENTIFICATIONOFFIREAREASThissectionprovidesdetailedinformationonthecriteriaandmethodologiesusedtodevelopfireareaandzonedefinitionsforD.C.Cook.Inaddition,themethodologyutilizedtodevelopequivalentfireseveritiesforeachfireareaarediscussed.TheresultsoftheseactivitiesarepresentedasTables2-1and2-2andFigures2.1through2.11.TheinformationcontainedinthissectiongenerallypresentstheD.C.Cookplantconfigurationofeachfirezoneandfireareaattheendofthe1986Unit2refuelingoutage.ThefireprotectionfeaturesincludemodificationsrequiredforcompliancewithAppendixRSectionIII.G,aswellasgeneralplantimprovementsinitiatedatthetimeofissueofthisreport.OnJanuary31,1977,theIndianaandMichiganElectricCompany(IBM)respondedtoAppendixAofBranchTechnicalPosition(BTP)APCSB9.5-1forUnits1and2attheD.C.CookNuclearPlant.Thegeneralguidelinesusedfortheplantlayoutoffirezoneswere:(1)'Identifysafety-relatedsystemsorequipment;(2)Isolatesafety-relatedsystemsorequipmentfromunacceptablefirehazardsbyspatialseparationorbytheprovisionoffirebarriersorenclosures;(3)Providefiredetectionand/orsuppressionequipmenttominimizetheeffectsofafire;and(4)Employcombinationsoftheabove,actingtocomplementorbackuponeanother.Page2-1 ThesegeneralcriteriawereincorporatedintotheMarch31,1977,FireHazardsAnalysisforUnits1and2oftheD.C.CookPlant.Atotalof104fireszoneswereidentifiedinthe1977FireHazardsAnalysisforD.C.Cook.Inthatresponse,roomsorareaswereidentifiedasseparatefirezonesiftheycontainedcombustiblematerials,safety-relatedequipmentorcablesand/orwereadjacenttozonescontainingsuchequipment.Foreachofthe104firezonesidentifiedinthe1977FireHazardsAnalysis,thecombustible/fuelloadingintermsofBtu'spersquarefootoffloorareawasdetermined.Thecombustiblematerialsconsideredintheanalysiswerecableinsulation,plastic,liquidhydrocarbons,flammablegases,andcarbonaceousproductssuchaswood,paperandcharcoal.Thephysicalbarriersseparatingfirezonesidentifiedinthe1977FireHazardsAnalysiswereconstructedofheavyreinforcedconcreteconstructionh'avingaminimumfireratingofthreehours.Theonlyexceptionstothisconstructionareconcreteblockwallswiththeminimumratingof1-1/2hours,whichhadbeenaddedforcompartmentalization.ArtificialUboundaries,suchasopenwalkwaysvaryingfromsixfeetinwidthtotheentirelengthorwidthofthezone,separatedanumberofzonesinboththeTurbineandAuxiliaryBuildings.IntheTurbineBuilding,theboundariesweredeterminedbythelocationofsuppressionand/ordetectionsystems.IntheAuxiliaryPage2-2 Building,thelocationwasdependentonthephysicalcharacteristicsoftheelevation.Theartificialboundariestypicallywerelocatedwhereelevatorshaftsorwallsreducedsizeoftheopeningsbetweenzonestolargeopenwalkways.2.2IdentificationofFireZonesThegeneralguidelinesusedforestablishingfirezonesintheIndianaandMichiganElectricCompany'sresponsetoAppendixAformedthebasisforthefirezoneandareaactivitiesperformedinresponsetoAppendixR.InrespondingtotheseparationcriteriaofAppendixR,SectionIII.G.2,astudywasperformedtoidentifylocationswithintheplantthat,ifrequired,couldbedefinedasfireareasorcouldbeusedasarriersduringtheIII.G;2(a)separat'ionanalysis.ThestudyThesewereidentifiedinthesubsequentanalysisbyaletterfollowingthepreviouszonedefinition(e.g.,40A).Insomecases,thesesubdividedzonesweresubsequentlyfoundtoconstituteavalidfirearea(e.g.,l7A).Inothercases,thesubzoneswerecombinedduringthecableseparationanalysisforanalyticalconvenience(e.g.,62A,B,C).Ingeneral,thoseAppendixAfirezonesthatwouldqualifyasafireareaunderthecriteriaofAppendixRwithoutmodificationsweredesignatedasfireareas.SystemsanalyseswereperformedonthefireareastoidentifypotentialconflictswiththeseparationcriteriaofAppendixR.Wherenoconflictsrbresultedinsubdivisionsofcertainpreviouslydefinedzones.Page2-3 arose,andwherenosafeshutdownequipmentwasidentifiedinthearea,compliancewithAppendixRwasidentified.NoattemptsweremadetocombinethefireareasthatdocomplywithAppendix'withadjacentfireareasorzonesinRevision0totheMarch1983submittal.However,duringthereevaluationeffort,somefireareasoriginallyincompliancewerecombinedandevaluatedforimpacttosafeshutdown.Anotherstudywasperformedthatide'ntifiedadditionalplantlocationsnotpreviouslytabulatedinthe1977analysis.TheseplantareaswereincorporatedintothefirezonelistinginRevision0totheMarch1983submittalandarenumberedasFireZones105through128.Manyofthesezonesweresubsequentlyfoundtocontainnosafeshutdownequipmentorcables.Sincethepreviousstudydidnotidentifyallplantareas,anadditionalstudywasperformedforthisreportperthecriteriaofGenericLetter83-33toaccuratelyidentifyallplantlocations.As'a,result,FireZones129through146wereidentified,someofwhichweresubdividedbylettersintomultiplezones(e.g.,138A).Theseplantareaswerealsoincorporatedintothefirezonelisting.Thenewlyidenti.fiedfirezones,withtheexceptionofFireZones144and145,containnosafeshutdowncablesorcomponents.Thesenewfirezoneswerecombinedwithadjacentfireareastoformlargerfireareas.FirehazardsanalysesandsafeshutdownsystemevaluationswereperformedtoensurethattherewouldbePage2-4 noimpactoncomplianceforthesefireareas(seeSections7and9).OnlyFireZones144and145,whichwereoriginallyincludedaspartofFireZones54and53,respectively,containsafe'hutdownequipmentorcables.However,thesetwozonesaretheUnit1andUnit2hotshutdownpanels,whichwereproposedtobeenclosedbythree-hourbarriersinRevision0totheMarch1983AppendixRsubmittal.Anartificialfirezonewasalsoidentifiedduringthecourseofthisstudy.Thiszone,ELSH,ismadeupofthetwoelevatorshafts(passengerandfreight)connectinglevelsoftheAuxiliaryBuilding.Thedooropeningstotheshaftsareprotectedby'B'abelfiredoors.Thisartificialzonewascreatedduetothedifficulties,associatedwithidentifyingaverticalshaftinhorizontalfireareaboundaries.Itexistsforconveniencepurposesonlyandisnotidentifiedelsewhereinthisreport.Basedonthesestudies,atotalof198individualandIsubdividedfire'ones(e.g.,40A)havebeenidentified.Table2-1isacompilationofallthefirezonesidentifiedinthisanalysis.2.3IdentificationofFireAreasAfireareaisdefinedasthatportionofaplant,separatedfromotherareasbyratedboundaryfirebarriers.Theratingoftthebarriersisdeterminedbythefire.hazardwithineachareaandisrequiredtobecommensuratewiththefirehazardtowhichPage2-5 thebarrierisexposed.Firebarriers,doors,dampers,andpenetrationsealsarenotnecessarilyrequiredtobethree-hour-rated.Theratingisdependentuponthefirehazardstowhich'heycouldbeexposed.AtD.C.Cook,theconstructionofwalls,floors,andceilingsistypicallyofheavy,reinforcedconcretewithaninherentfireratingofatleastthreehours.Inadditiontothisconstruction,thedefinitionofthefireareaboundariesmustalsoaddresstheprotectionprovidedforthedoors,dampers,stairways,hatches,andotherpenetrationsinthefireareaboundaryconstruction.DoorsanddampersatD.C.Cook.aretypicallyeitherl-l/2orthree-hourfire-ratedwhen.theyformpartofabarrierseparatingfireareas.Evaluationsand/orexemptionrequestsareprovidedwherefire'-ratedprotectiondoesnotexist.Ratingsalsomayexistfordoorsthatformzoneboundarieswithinanareaorarepartofexteriorwalls.AtD.C.Cook,noexternalfirehazardsexistalongexteriorplantwallsthatcontainunrateddoors.Someconditionsexistwhereventilationsystemsexitintoratedenclosuresandproceedthroughotherareasintheplanttotheexterior.Rateddampersdonotexistinthesesituations.ThesetypesofventilationsystemsexistinZones40A,40B,4l,42A,42D,45,46A,46D,47Aand47B(EmergencyPowerSystemsArea).Section-3discussesfurthertheacceptableimpactoftheseopeningsonthesezone'sgaseoussuppressionsystems.Page2-6 StairwaysconnectingfireareaswithintheAuxiliaryBuildingwillbeprovidedwithautomaticwatersuppressionsystemsaroundtheperimeterofthestairopenings.Thesesystemsformwatercurtainsthatinhibitthepassageofhotgases,flamesandproductsofcombustiontotheareasabove.BasedonthelowareacombustibleloadingofeachleveloftheAuxiliaryBuilding(lessthantenminutesforanyfirearea),thistypeofwatersuppressionprotectionprovidesanadequatebarrierthatpreventsfirepropagationtoadjoininglevels.ThisprotectionpermitseachleveloftheAuxiliaryBuildingtobetreatedasaseparatefirearea.Unratedmetalhatches,wheretheyformpartofafireareaboundary,havebeenevaluatedandfoundtoprovidealevelofprotectionappropriatetotheareahazard,inconjunctionwiththeexistingfirepr'otectionfeaturesforthatarea.Largeconcreteplugsareprovidedinthefloor/ceilingassembliesbetweenfireareasoftheAuxiliary'uildingforequipmentremoval.Wheninplace,theseplugsprovideanequivalentlevelofprotectiontothatrequi.redforthebarrier.Otherpenetrationsandopeningsinbarriersseparatingfireareasthatcontainsafe-shutdownequipmentareeithersealedtoprovidealeveloffireprotectioncommensuratewiththefirehazardinthefireareaorevaluationsareperformedtojustifytheexistingconfiguration.Page'2-7 Penetrationsandopeningsmaynotbesealedwhereareawallsformanaturaldivisionbetweenplantbuildings,theareasdonotcontainsafeshutdownequipment,andthecombustibl'eloadingin'hevicinityofthewallisextremelylow.Suchunsealedpenetrationsandopeningsinbarrierstypicallyexisteitherasnaturalventilationflowpathsortofacilitateotheraspectsofplantandbuildingdesign(waterdrainagepaths,roompressurereliefforhypothesizedpipebreaks,seismicgaps,etc.).Ingeneral,artificialboundaries(i.e.,largeopenspaces)donotexistbetweendefinedfireareas..However,thisisnotalwaysthecase.Forexample,anevaluationisperformedtojustifytheladderopeningconnectingeachunit'smainsteamvalveenclosure(FireZones33and34forUnits1and2,respectively)withtheRW,CSandPWtankareapipetunnel(Fire,Areas116and117forUnits1and2,respectively),whichthenconnectswiththequadrant2pipingtunnel(FireAreas12and22forUnits1and2,respectively)viaanopenwalkway.Artificialboundariesdoexistbetweenfirezonesorsub-zoneswithinafirearea.'heseboundariesoccurinsomecasesasaresultofthecombinationofpreviouslydefinedzonesintolargerfireareas.Inothercases,theywerecreatedtoequipmentseparation,analysis.Infacilitatethe,cableandallinstances,theseartificialboundarieswererecognizedassuch,.andtheseparationanalysisperformedbetweensuchzonesusedtheIII.G.220-ftand/orone-hourbarrierprovisions.Page2-8 Aninherent'featureoftheD.C.Cookelectricalsystemdesignis'heextensive,useofembeddedco'nduit.Althoughsuchembeddedconduitprincipallycontainspowercabling,somecontrolandinstrumentcircuitsmayalsoberoutedwithinembeddedconduits.Embeddedconduittypicallyislocatedinconcretefloorfillslabs.Thesefillslabs,ofvaryingthickness,arepoureddirectlyonthefloor'sstructuralconcretepads.Embeddedconduitsalsoexistincertainverticalwallsections.Suchfloorandwallconduitsareembeddedwithaminimumoffourinchesofconcretecover.Insomecases,theconduitmayexistundertwotothreefeetofconcrete.Inallcases,duetotheinherentfireratingsassociatedwithsuchconstructionandtheseparationavailablebetweenredundantdivisionconduitswithintheslabs,cablessoembeddedarenotconsideredaspartofanyidentifiedfirezoneuntiltheyexittheconcrete.Basedonthesecriteria,theMarch1983submittalidentified80fireareasatD.C.Cook.Asaresultofidentifyingpreviouslyunidentifiedplantlocations,fireareaboundarieshavechanged.Insomecases,fireareasidentifiedseparatelyintheMarch1983submittalwerecombinedintolargerfireareas.Inothercases,thenewlyidentifiedfirezoneswerecombinedwithadjacentfireareasforminglargerfireareas.Wherepenetrationsinfireareaboundarieswereidentifiedashavingnoimpactonredundantsafeshutdowncapabilities,technicalevaluationswereperformedjustifyingtheconfigurations(seePage2-9 Section9).Thesefireareas,whichmayconsistofindividualfirezonesoraconsolidationofzones,arelistedin'able2-2andareshowngraphicallyinFigures2.1through2.11onafloor-'y-floor(planandsectionalviews)basis.Atotalof57fireareashavebeenidentifiedinthismanner.Theautomaticdetectionandsuppressionsystems,whicharedescribedinSection3,arealsolistedinTable2-2.Table2-2alsoidentifiesfloorareasandcombustibleloadingsonafirezonebyfirezonebasis,withtotalfloorareasandcombustibleloadingsprovidedforeachfirearea.EachsolidhorizontallineinTable2-2delineatesoneofthe57:fireareasutilizedinthisanalysis.Wherezonesandsub-zoneshavebeencombinedintoasinglefirearea,thezonesaregroupedtogetherinthistableandareseparatedfromotherfireareasbysolidhorizontallines.Unlessspecificallyindicated;theratingoftheboundaryfirebarriersforeachfireareaindicatedinthistabledescribestheminimumfireratingofthecomponentsthatformtheboundariesofthearea.Figures2.1through2.11identifythelocationoffireareaandfirezoneboundariesastheyexistatD.C.Cook.Bluelinesinthesefiguresidentifyfireareaboundaries,whileorangelinesidentifyfirezoneboundariesthatdonotformaportionoffireareaboundaries.Figures2.1through2.11identifytheentiretyoffireareaboundaries;theydonotsolelyidentifythosebarriersthatseparateinteriorfireareas.Assuch,exteriorwalls'andwallsbelowgradethatdonotabutadjacentPage2-10 interiorfireareashavealsobeenidentifiedwithbluelinesasfireareaboundaries.ThesefireareasareidentifiedfortheperformanceofAppendixRseparationanalysis.Whereonlyonetrainofsafeshutdownsystemsislocatedwithinafireareawithjustifiablebarriers,thenthecriteriaofAppendixRSectionIII.G.laremet.AlthoughnotspecificallyidentifiedineitherTable2-2orFigures2.1through2.11,three-hour-ratedbarriersseparatingredundantsafeshutdowncomponentslocatedinthesamefireareahavebeenidentified.Thesebarriers,whilenotresultinginthecreationofseparatefireareas,havebeenutilizedtoachievecompliancewithSectionIII.G.2(a)ofAppendixR.TheIII.G.2(a)barriersatD.C.Cookthathavebeenutilizedareidentifiedasfollows:(1)TheT-shapedwallseparatingtheUnit1RHRpumpsinFireZone1CandFireZone1Donthe573ftelevationoftheAuxiliaryBuilding;(2)TheT-shapedwallseparatingtheUnit2RHRpumpsinFireZone1GandFireZonelHonthe573ftelevationoftheAuxiliaryBuilding;(3)ThewallseparatingUnit1ESWpumpsinFireZone29AandFireZone29BfromtheUnit2ESWpumpsinFireZone29CandFireZone29D;and(4)ThebarrierseparatingtheUnit1CCWpumpsfromtheUnit2CCWpumpsandthespareCCWpumpfromtheUnit1andUnit2CCWpumps.2.4ProcedureforUdatinCombustibleLoadinSinceth'esubmittalofthe1977FireHazardsAnalysis,additionalcablinghasbeeninstalledatD.C.Cook.InordertoPage2-11 addressthisincreaseincombustibleloadingduetoadditionalcableinsulation,previouslydevelopedzonecablecombustibleloadingswereincreasedbyanaveragevaluebasedonthetotal'mountofadditionalcableinstalledatD.C..-Cook.AreviewofdocumentationrevealedthatthetotalnumberoffeetofcableatD.C.Cookincreasedby"approximately25~between1977and1982.A25~increaseincombustible'loadingassociatedwithcableinsulationwasthereforeappliedtothefirezonesidentifiedinthe1977FireHazardsAnalysisforD.C.Cook.Inordert'oaccountforadditionalamountsofcableinstalledsince1982,anadditional10%increaseintotalfeetofinstalledcablehas,'beenappliedtothosefirezonescontainingcableinsulation.Between1982andtheendof1985,theactualincreasehasbeenlessthan5%.The254and10<increasesareconservativeinnaturebecausetheincreasesincludeallcablesusedintheplant,whetherincabletraysorconduit.Since1977,'ablesinconduitandtraysinsomefireareas/zoneshavebeenwrappedwithaone-hourfirebarriertoachievetheappropriateseparationcriteria.Pilastersinthedieselgeneratorroomshavebeenprotectedwithathree-hourwrap.Asaconservativemeasure,thewrappedcableshavenotbeendeletedfromthecablecombustibleloadinginthefireareas/zoneswheretheyexist.Areasurveyswereconductedin1982andagainin1986todetermineifanyadditionalsubstantialcombustibleshadbeenaddedtothevariouszones.Page2-12 TheequivalentfireseveritythenwasestimatedthroughastrictinterpretationofthecriteriapresentedinTable6-8Aofthe14thEditionoftheFireProtectionHandbook.Thistable,whichwasalsoutilizedtoestimatethefireseverityinthe1977FireHazardsAnalysis,relatestheBtu/ftofcombustiblematerialwiththeestimatedminutesoffireseveritybasedontheareaunderthestandardtime-temperaturecurve.Thevaluescontainedwithinthistablearebasedonmaterialswithanaverageheatofcombustionof8000Btu/lb.Toobtainanaccurateequivalentfireseverityformaterialswithheatsofcombustiongreaterorlessthan8000Btu/lb,th'eBtu/ftreferencedinTable6-8Amustbemultipliedbytheratiooftheheatofcombustionoftheactualmaterialswithinthezone(cableinsulation,liquidhydrocarbons,plastics,etc.)dividedbytheheatofcombustion(8000Btu/lb)utilizedinthetable.Thisanalysishasbeenperformedforea'chfireareacontainedwithinthisreportwiththeequivalentfireseveritiesreferencedinTable2-2.Table2-2ofthisreportcorrelatestoTable2-2oftheMarch1983submittal,buthasbeenreformattedandincludesadditionalinformation.2.5SulementalInformationtoSuorttheContentionthatCablesinConduitEmbeddedinConcretearenotPartoftheFireAreaSection2.3statesthatcableslocatedinconduitembeddedinconcretewalls,floors,orceilingswerenotconsideredaspartofanyfirezoneuntiltheyexitedtheconcrete.ThePage2-13 supplementalinformationcontainedinthissectionprovidesthebasisforthistechnicaldetermination.Thetechnicalbasissubstantiatingthatfourinchesof'oncretecoverprovidesadequateprotectionforembeddedcablesconsidersthefollowing:(1)Thefirehazardand,leveloffiredetection.andsuppressionthatexistforeachofthevariousareasofconcern;(2)TheNFPAratingsforconcretefirebarriers;(3)ThedifferencebetweenconfigurationandtheconfigurationsatDonaldC.cable;theNFPAfirebarrier,wall,floor,ceilingCookthatcontainembedded(4)ThedifferencebetweentheNFPAfirebarriercoldsidetemperaturecriteriaandthetemperaturefailurecriteriafortypicalnuclearplantcables.InaccordancewiththeNFPA's14thEditionoftheFireProtectionHandbook,Table6-7GofSection6concerningbuildingconstructionanddesigncriteriaindicatesthatfornormalweightconcrete,whichisthepredominanttypeofconcreteatD.C.Cook,Jaminimumsolidthicknessof4.2to4.5inchesresultsinatwo-hourfirerating,whileaone-hourfireratingrequiresonly2.8to3inchesofconcrete.Therangeoftheseratingsisbasedonthetwotypesofconcreteaggregatethatcouldpotentiallybeused.Althoughthiswouldindicatethatal-l/2to2-hourratingisachievedbyasimplefour-inchconcretesection,directuseoftheseratingsfortheactualconfigurationoftheconcretePage2-14 sectionscontainingembeddedcableatD.C.Cookshouldnotbemade.Figure2.0-adepictsthetypicalconstructionforwhichtheNFPAratingsdirectlyapply,whileFigure2.0-bindicatesthetypicalconstructionofconcreteatD.C.Cookcontainingembeddedcables.Itimmediatelybecomesapparent,recognizingthetypicalvaluesforthermalconductivityandheatcapacityofconcrete,thattheadditionalbarriermassbetweentheembeddedcablesandthecoldsidewillfunctionasaheatsink,loweringtheactualin-walltemperatureattheembeddedcabletoanumbersubstantiallylowerthanthe322FusedforthestandardNFPAbarrierrating.The322FvalueintheNFPAratingsisbasedonalimitingfactorof250Fplusanassumedambienttemperatureof72Fonthecoldsideoftheconcretesection.Inordertoquantifythiscomparison,aFiniteDifferenceThermalComputerModelwasusedthatassumedaconstantfiresideheatfluxofthree-hourdurationandmeasuredthetemperaturevariationsatthefour-inchembedmentforvarioussectionthicknesses.Asabasecase,afour-inchconcretesectionwasusedwithincidentheatfluxesvarieduntila322Fcoldsidetemperaturewasachieved.Oncedetermined,thisbasecaseheatfluxwasappliedfor6.0,8.0and12.0inchconcretesectionsforathree-hourduration.Inallcases,thecoldsidewallwasPage2-15 assumedadiabatic.Themodelresultslistedbelowindicatethat,atadistancefromthehotsideoffourinches,theconcretetemperaturesdecreasedramaticallyaswallthicknessincreases.TotalSectionThickness(in.)Tem.at4in.at3hours(F)4.06.08.012.0322216197196Furthersupportfortheconclusionthatembeddedcabledoesnotdegradeiscontainedinareportentitled,"AStudyofDamageability-'of'lectricalCablein'.SimulatedFireEnvironments,"preparedbyFactoryMutualResearchCorporationipMarch1981fortheElectricPowerResearchInstitute.Thereport"indicatesthatthesurfacetemperaturefor11cablesamples(varyingfromPE/PVCtoEPR/Hypalon),atthepointwhereinsulationdegradationbegins,rangesfrom567Fto993F.Thetemperatureatwhichinsulationdegradationbeginsishigherthanthetemperaturesassociatedwiththefailurecriteriaof322FforNFPA-ratedfire'barriers.Whenacomparisonismadebetweentheonsetofinsulationdegradation(567Fto993F)andthelikelythermalprofilesforconcretesectionstypicalforD.C.Cookbarriers,itisevidentthatnocableinsulationdegradationshouldoccurforembeddedcables.Page2-16 IndianaandMichiganElectricCompany'stechnicalconclusionisthataminimumconcretecoveroffourinchesprotectingembeddedconduitandcableprovidessufficientprotectiontojustifytheexclusionofembeddedconduitandcableinanyfireareauntilitexitstheconcretesection.2.6IdentificationofMaximumAllowableCombustibleLoadinJustificationforsomeoftheexemptionsandevaluationsisbasedonthequantityofcombustibleloadingpresentinthearea.Forthepurposeofcontrollingtheincreaseoffixedand/ortran-sientcombustibleloadingduetomaintenanceorfutureplantmodifications,amaximumallowable'ombustibleloadingvalueisidentifiedonlyforthoseareasinvolvedinanexemptionoreval-uation.ThesevaluesarelistedinTable2-3.Theplantloca-tions(areas)identifiedonthistablemayconsistofasinglefirezone,asinglefire,area,oragroupoffirezonesthatdonotmakeafirearea.Unlessspecificallylisted,thevaluesin,Table2-3aretot'alsoffixedandtransientcorhbustibleloadingsintheareas.ThefirezonesinTable2-'3aregroupedtogetherbyfirearea,similartothoselistedinTablesl-land2-2.Page2-17 FireZone1A1BlC1DlE1F1G1H6A*6NTABLE2-1FIREZONEIDENTIFICATIONTABLEIdentificationAuxiliaryBuilding-El573ft0in.-bothunitsContainmentSprayPumpEast,AuxiliaryBuilding-El573ft0in.-Unit1ContainmentSprayPumpWest,AuxiliaryBuilding-El573ft'in.-Unit1ResidualHeatRemovalPumpEast,AuxiliaryBuilding-El573ft0in.-Unit1ResidualHeatRemovalPumpWest,AuxiliaryBuilding-El573ft0in.-Unit1ContainmentSprayPumpEast,AuxiliaryBuilding-El573ft0in.-Unit2ContainmentSprayPumpWest,AuxiliaryBuilding-El573ft0in.-Unit2ResidualHeatRemovalEast,AuxiliaryBuilding-El573ft0in.-Unit2ResidualHeatRemovalWest,AuxiliaryBuilding-El573ft0in.-Unit2PumpBayTurbineBuilding-El569ft6in.-bothunitsDrumming/DrumStorage-El587ft0in.SamplingRoomAuxiliaryBuilding-El587ft0in.AuxiliaryBuilding-El587ft0in.(EastEnd)-bothunitsAuxiliaryBuildingPipeTunnel-El601ft0in.andEl609ft0in.-bothunitsAuxiliaryBuilding-El587ft0in.(NorthsectionoftheWestEnd)-Unit1Page1of10 TABLE2-1(continued)FireZone6M6S101213151617A17B17C17D17E17F17G182021IdentificationAuxiliaryBuilding-El587ft0in.(MiddlesectionoftheWestEnd)-bothunitsAuxiliaryBuilding-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.-Unit1TransformerRoom-El591ft0in.-Unit1lCDDieselGeneratorRoom-El587ft0in.-Unit1lABDieselGeneratorRoom-El587ft0in.-Unit1WestAux.FeedPumpRoom-El591ft0in'.-Unit1WestAux.FeedPumpRoom-El591ft0in.-Unit2CorridortoAux.FeedPumpRooms-El591ft0in.bothunitsEastAux.FeedPumpRoom-El591ft0in.-Unit1TurbineAux.FeedPumpRoom-El591ft0in.-Unit1TurbineAux.FeedPumpRoom-El591ft0in.-Unit2EastAux.FeedPumpRoom-El591ft0in.-Unit22CDDieselGeneratorRoom-El587ft0in.-Unit22ABDieselGeneratorRoom-El587ft0in.-Unit2TransformerRoom-El591ft0in.-Unit2DieselOilPumpRoom-El587ft0in-Unit2Page2of10 TABLE2-1(continued)FireZone2223242526272829A29B29C29D29E29F29G3031323333A33BIdentificationQuadrant2PipingTunnel-El591ft0in.-Unit2Quadrant3NCableTunnel-El596ft3-1/2in.-Unit2'uadrant3MCableTunnel-El596ft3-1/2in.-Unit2Quadrant3SCableTunnel-El596ft3-1/2in.-Unit2Quadrant4CableTunnel-El596ft3-1/2in.-Unit2Quadrant1CableTunnel-El596ft3-1/2in.-Unit2DieselFirePumpRoom-El591ft0in.-Unit1EssentialServiceWaterPumpPP-lE-El591ft0in.Unit1EssentialServiceWaterPumpPP-1W-El591ft0in.Unit1EssentialServiceWaterPumpPP-2E-El591ft0in.Unit2EssentialServiceWaterPumpPP-2W-El591ft0in.Unit2MotorControlCenterForESWPumps-El591ft0in.Unit1MotorControlCenterForESWPumps-El591ft0in.Unit2ScreenHouseAuxiliaryMCCRoom-El575ft0in.bothunitsUnit2DieselFirePumpRoom-El591ft0in.ConcreteMixingBuilding/DrummingAreaEl609ft0in.CaskHandlingArea-El609ft0in.-bothunitsMainSteamValveEnclosure,East-El612ft0in.Unit1MainSteamLineArea,East-El612ft0in.-Unit1NonEssentialServiceWaterValveArea,WestEl612ft0in.-Unit1Page3of10 TABLE2-1(continued)FireZone3434A34B353637383940A40B4142A42B42C42D4344N44A44BIdentificationMainSteamValveEnclosure,East-El612ft0in.Unit2MainSteamLineArea,East-El612ft0in.-Unit2NonEssentialServiceWaterValveArea,West-El612ft0in.-Unit2InstrumentCalibrationRoom-El609ft0in.SpentFuelHeatExchangerPitPumpRoom-El609ft0in.ValveGallery-El617ft0in.-bothunitsQuadrant2PenetrationCableTunnel-El612ft0in.Unit1Quadrant2PenetrationCableTunnel-El612ft0in.Unit24kVABSwitchgearRoom-El609ft6in.-Unit14kVCDSwitchgearRoom-El609ft6in.-Unit1EngineeredSafetySystem6MCCRoom-El609ft6in(6Underfloor)-Unit1EPSTransformerRoom-El609ft6in.-Unit1EPSControlRodDriveRoom-El609ft6in.-Unit1EPSMotorControlRoom-El609ft6in.-Unit1EPS(AB)BatteryRoom-El609ft6in.-Unit1AccessControlArea-El609ft0in.-bothunitsAuxiliaryBuildingNorth-El609ft0in.-bothunitsAuxiliaryBuildingSouth-El609ft0in.-bothunitsContainmentSprayHeatExchangerRoom518E,Auxilia'ryBuilding-El609ft0in.-Unit1ContainmentSprayHeatExchangerRoom518W,AuxiliaryBuilding-El609ft0in.-Unit1Page4of10 TABLE2-1(continued)FireZone44C44E44F44G44H46A46B46C46D47A47B495051525354IdentificationResidualHeatRemovalHeatExchangerRoom517E,AuxiliaryBuilding-El609ft0in.-Unit1ResidualHeatRemovalHeatExchangerRoomgl7W,AuxiliaryBuilding-El609ft0in.-Unit1ContainmentSprayHeatExchangerRoom518E,AuxiliaryBuilding-El609ft0in.-Unit2ContainmentSprayHeatExchangerRoom518W,AuxiliaryBuilding-El609ft0in.-Unit2ResidualHeatRemovalHeatExchangerRoomgl7E,AuxiliaryBuilding-El609ft0in.-Unit2ResidualHeatRemovalHeatExchangerRoomgl7W,AuxiliaryBuilding-El609ft0in.-Unit2EngineeredSafetySystem&MCCRoom-El609ft6in.(6Underfloor)-Unit2EPSTransformerRoom-El609ft6in.-Unit2EPSControlRodDriveRoom-El609ft6in.-Unit2EPSMotorControlRoom-El609ft6in.-Unit2EPS(AB)BatteryRoom-El609ft6in.-Unit24kVABSwitchgearRoom-El609ft6in.-Unit24kVCDSwitchgearRoom-El609ft6in.-Unit2NewFuelStorageRoom-El633ft0in.HVACVestibule-El633ft0in.-Unit1HVACVestibule-El633ft0in.-Unit2AuxiliaryBuilding-El633ft0in.(EastEnd)-bothunitsAuxiliaryBuilding-El633ft0in.(WestEnd)-bothunitsUnit1ControlRoom-El633ft0in.Unit2ControlRoom-El633ft0in.Page5of10 TABLE2-1(continued)Zone5556575859606162A62B62C63A63B63C64A64B65A65B66676869IdentificationSwitchgearRoomCableVault-El625ft10in.-Unit1AuxiliaryCableVault-El620ft6in.-Unit1ControlRoomCableVault-El624ft0in.-Unit1ControlRoomCableVault-El624ft0in.-Unit2AuxiliaryCableVault-El622ft6in.-Unit2SwitchgearRoomCableVault-El625ft10in.-Unit2SprayAdditiveTankRoom-El587ft0in.-bothunitsReciprocatingChargingPump-El587ft0in.-Unit1CentrifugalChargingPump-El587ft0in.-Unit1CentrifugalChargingPump-El587ft0in.-Unit1ReciprocatingChargingPump-El587ft0in.-Unit2CentrifugalChargingPump-El587ft0in.-Unit2CentrifugalChargingPump-El587ft0in.-Unit2SafetyInjectionPumpNorth-El587ft0in.-Unit1SafetyInjectionPumpSouth-El587ft0in.-Unit1SafetyInjectionPumpSouth-El587ft0in.-Unit2SafetyInjectionPumpNorth-El587ft0in.-Unit2ContainmentPipingAnnulus-El598ft9-3/8in.Unit1ContainmentLowerVolume-El598ft9-3/8in.-Unit1ContainmentUpperVolume-El650ft0in.-Unit1AuxiliaryBuilding-El633ft0in.and650ft0in.bothunits7071ControlRoomHVACEquipment-El650Unit1ComputerRoom-El650ft0ift0in.-Unit1n.72Unit2ComputerRoom-El650ft0in.Page6of10 TABLE2-1(continued)FireZone73747677IdentificationControlRoomHVACEquipment-El650ft0in.-Unit2'ontainmentPipingAnnulus-El598ft9-3/8in.Unit2ContainmentLowerVolume-El598ft9-3/8in.-Unit2ContainmentUpperVolume-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).FireZone9596979899100101102103104105106107108109110112113114115IdentificationTurbineRoomUnit1TurbineOilTankRoom-El605ftllin.TurbineRoomUnit2(N.E.Portion)-El609ft0in.TurbineRoomUnit2(S.E.Portion)-El609ft0in.TurbineRoomUnit2(S.W.Portion)-El609ft0in.TurbineRoomUnit2(N.W.Portion)-El609ft0in.TurbineRoomUnit2TurbineOilTankRoom-El609ft0in.Containment1AccumulatorEnclosureWest-El612ft0in.*Containment2AccumulatorEnclosureWest-El612ft0in.ReactorHeadEnclosure-Unit1-El567ft2in.ReactorHeadEnclosure-Unit2-El567ft2in.ContractorAccessControlBuilding-El612ft0in.Aux.F.W.BatteryRoomgl-AuxiliaryBuilding-El633ft0in.-Unit1Aux.F.W.BatteryRoomg2-El633ft0in.-Unit2WestSteamValveEnclosure-Unit1-El635ftWestSteamValveEnclosure-Unit2-El635ftMainSteamAccessway-Unit1-El587ft0in.MainSteamAccessway-Unit2-El587ft0in.EssentialServiceWaterPipeTunnel-Unit1El570ft6in.EssentialServiceWaterPipeTunnel-Unit2El570ft6in.EssentialServiceWaterPipeTunnel-Unit1-El587ft0in.EssentialServiceWaterPipeTunnel-Unit2El587ft0in.Page8of10 TABLE2-1(continued)FireZone116117118119120121122123124125126127128129*130*131*132*133*134*135*IdentificationRW,CS,PWTankAreaPipeTunnel-Unit1El593ft0in.RW,CS,PWTankAreaPipeTunnel-Unit2-El593ft0in.ContainmentRegenHeatExchangerRoom-Unit1El612ft0in.IContainmentRegenHeatExchangerRoom-Unit2El612ft0in.Containment1AccumulatorEnclosureEast-El612ft0in.Containment2AccumulatorEnclosureEast-El612ft0in.Containment1InstrumentationRoom-Unit1El612ft0in.Containment2InstrumentationRoom-Unit2El612ft0in.UPSInverterRoomSecurity-El591ft0in.CASSecurity-El633ft0in.TechSupportCenter-El633ft0in.-bothunitsTSC,UPSInverterandBatteryRooms-El650ft0in.bothunitsUPSBatteryRoomSecurity-El591ft0in.Unit1TurbineDeck-El633ft0in.Unit2TurbineDeck-El633ft0in.ServiceandOfficeBuildingsUnit1IceCondenser-El640ft0in.Unit2IceCondenser-El640ft6in.Unit1ReactorVesselPit-El567ft0in.Unit2ReactorVesselPit-El567ft0in.Page9of10 TABLE2-1(continued)FireZone136*137*138A*138B*138C*139*140*141*142*IdentificationUnit1PipeTunnel-El573ft0in.Unit2PipeTunnel-El573ft0in.CVCSHold-upTankAreaNorth-El562ft0in.CVCSHold-upTankAreaMiddle-El562ft0in.CVCSHold-upTankAreaSouth-El562ft0in.TurbineRoomSump-El570ft9in.TurbineCausticPumpandTankArea-El569ft0in.TurbinePumpPit-El571ft0in.Screenhouse-El591ft0in.'-bothunits143*WaterIntakeandDischargeSystem-El546ft0bothunitsin.144*145*146*Unit1HotShutdownPanelEnclosure-El633ft0in.Unit2HotShutdownPanelEnclosure-El633ft0in.AuxiliaryBuildingLoadingPlatform-El609ft0in.*Areasoftheplantthatwerepreviouslynotidentifiedasfirezonesinthe1983AppendixRsubmittalPage10of10 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS~IIIIFIREAREA*EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBERRHRANDCTSPUMPS~AREAIE.573'-0"(SEENOTE26)11A187IONIZATION2IONIZATION2IONIZATIONDRYPILOTPREACTIONSPRINKLERS(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>ION2IONIZATION2IONIZATIONNONEI(SEENOTE42)IIIINONEII(SEENOTE42)IIIINONEI(SEENOTE42)II(THISFIREAREAISCONT5.19.2INUEDONNEXTPAGE)6,87712.3094,7742842843242.5,2.62.2,2.5,2.62.6EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE1OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS'IREAREA*EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBCR1F1G1H136137138A138B138C2IONIZATION2IONIZATION2IONIZATIONINONEIIINONEIIINONENONEINONENONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)NONE(SEENOTE42)TOTAL3.75.60.60.92.94,9137,3037,5938041,1544,0793242842843173172,0252,0252,02514,4502.62.2,2.62.2,2.62.2,2.62.2,2.5,2.62.2,2.62.2,2.6EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE2OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS>>IIIjFIREAREA~EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBERj(SEENOTE2lIjNONEi1TURBINEBUILDING,SCREENHOUSE,SERVICE/OFFICEaBUILDINGSANDUNITS1AND2r'ESTMAINSTEAMjVALVEENCLOSURESS26827)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/CORRIDORNONENONEWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERS90.290.24.14.05.93.02.3119,922119,9225,4545,4197,9833,9803,1744004002,0882,16011,14014,4'1812,8122.72.72.1,2.72.1,2.72.1,2.4,2.72.1,2.4,2.5,2.72.1,2.4.2.5,2.7(THISFIREAREAISCONTINUED0GE)NNEXTPAEACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE3OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS>>FIREAREA'EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBER8283848586878889909192NONE1THERMISTORNONE4IONIZAIONIFORD.G.tRAMP/CORRIDORINONENONE1THERMISTORNONENONENONEINONEWETPIPESPRINKLERSAUTOMATICC02,WETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSAUTOMATICC02,WETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERS8.03HR2.44.120.06.43HR3HR5.319.412.210,6512,687,4583,2575,59926,6328,6454,252,164602,6627,03825,87516,38611,21289714,824.12,54912,83312,8341,07280010,99815,40013,8252.1,2.4,2.72.1,2.4,2.72.1,2.5,2.72.1,2.72.1,2.72.1,2.5,2.72.1,2.5,2.72.1,2.72.1,2.4,2.82.1,2.4.2.5,2.82.1,2.4,2.5,2.8(THISFIREAREAISCONTINUEDONNEXTPAGE)4EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE4OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS~IIIsFIREAREA*I93949596979899100108109110EXISTINGDETECTIONNONENONE1THERMISTORNONENONENONEINONEI1THERMISTORINONEIINONEIINONENONEEXISTINGSUPPRESSIONWETPIPESPRINKLERSWETPIPESPRINKLERSAUTOMATICC02,WETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSWETPIPESPRINKLERSAUTOMATICC02,WETPIPESPRINKLERSNONENONENONENONEMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)4.92.3>>3HR23.72.48.728.43HR7.611.80.60.6FIRELOADBTU/FT26,6273,0912,600,08431,5473,20711,57237,7133,314,42810,18715,872803838AREAFT12,70589059015,30012,52414,08013,1391,1028978971,7761,776FIGURENUMBER2.1,2.82.1,2.82.1,2.82.1,2.5,2.82.1,2.82.1,2.82.1,2.5,2.82.1,2.5,2.82.2,2.4,2.10,2.112.2,2.10,2.112.2,2.4,2.7,2.8,2.92.2,2.7,2.8,2.9(THISFIREAREAISCONTINUEDONNEXTPAGE)EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE5OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS'FIREAREA~I112113114EXISTINGDETECTIONNONENONENONEEXISTINGSUPPRESSIONNONENONENONEMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)0.20.1FIRELOADBTU/FT3293,250142ARE)FT1,2291,229539FIGURENUMBER2.4.2.5.2.62.5,2.62',2.7115NONENONE539.2.2,2.71241251261272IONIZATION4IONIZATION(2UNDERFLOOR)COMPUTERROOM4IONIZATIONCONSOLEROOM4IONIZATION(2UNDERFLOOR)CONSULTATIONROOMS4IONIZATION(2PERRM)IREMAININGTECHSUPPORTCENTER3IONIZATIONUPS,INVERTERROOMI2IONIZATIONUPSBATTERYROOM2IONIZATIONAUTOMATICHALON1301AUTOMATICHALON1301AUTOMATICHALON1301AUTOMATICHALON1301WETPIPESPRINKLERSYSTEMNONEAUTOMATICHALON1301NONE68.09.890,40013,0514002252,4501,0352.72.102.1,2.102.2,2.4,2.11(THISFIREAREAISCONTINUEDONNEXTPAGE)EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE6OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREASFIREAREA>>EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREAIBOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBER128129NONETHERMISTORSFORTURBINENONEMANUALWATERSPRAYFORTURBINEIUNDERLAG-GINGANDMAN-UALDRYCHEM"ICALFORTUR-BINEBEARING31.43.541,8374,96344053,2792.72.1,2.4,2.10,2.11I130131EL.649'-6"(EXTENSION)EL.636'-6"(EXTENSION)CHEMLAB4IONIZATIONTHERMISTDRSFORTURBINEQCVAULT2IONIZATIONREMAININGIFLOORAREA51IONIZATION44IONIZATIONNONEMANUALWATERSPRAYFORTURBINEUNDERLAG-GINGANDMAN-UALDRYCHEM-ICALFORTUR-BINEBEARINGAUTOMATICHALON1301NONEWETPIPESPRINKLERSFORMECH.EQUIP.RM.ONLY1.71282.528170.30253,13583,3282.5,2.10.2.112.1,2.7,2.8,2.10(THISFIREAREAISCONTINUEDONNEXTPAGE)4EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE7OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS~IjFIREAREA+IIEL.'33'-0"IIEL.623'-6-(EXTENSION)EL.621'-0"EXISTINGDETECTION11IONIZATION26IONIZATIONQARECORDVAULT1IONIZATIONEXISTINGSUPPRESSIONWETPIPESPRINKLERSFORSERVICEBLDGWETPIPE5PRINKLERSFORLOCKERROOMAUTOMATICC02MINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBEREL.609'-0"(EXTENSION)EL.609'-0"EL.595'-0-TELEPHONEEQUIP.ROOM1IONIZATIONOTHERFLOORAREAS10IONIZATION12IONIZATION10HEAT19IONIZATION14HEATFILEROOM,CHARTANDRECORDS3IONIZATIONAUTOMATICC02WETPIPESPRINKLERSFORSERVICEBLDGANDOFFICEBLDGHVACEQUIP.ROOMWETPIPESPRINKLERSWETPIPESPRINKLERSFORSERVICEBLDG,MISCOFFICEBLDGAREASAUTOMATICC02(THISFIREAREAISCONTINUEDONNEXTPAGE)EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE8OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS'IREAREASIEXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTUIFTAREAFTFIGURENUMBEREL.595'-0"SECURITYEQUIP.ROOM2IONIZATIONREMAININGFLOORAREAS10IONIZATION3HEATAUTOMATICHALON1301WETPIPESPRINKLERSFORSERVICEBLDG8"OFFICEBLDGMECH.EQUIP.ROOMS.DELUGESYSTEMFOROFFICEBLDGGAS8BOTTLESTORAGE,8ROAD-WAYOVERHANGIELEVATORLOBBY~(EXTENSION)3IONIZATIONNONE139140141142143NONENONENONENONENONENONENONENONENONENONE2.61.519.03,6982,19625,6521,1648881,61118,60899.8002.1,2.5,2.62.1,2.4,2.62.1,2.5,2.62.4,2.5.2.7,2.82.1,2.4.2.5~2.6TOTAL41.855,776555,579EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE9OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS>>IFIREAREA~IEXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERIAUXILIARYBLDGEL.633'650'ANDFUELHANDLING!BUILDINGf(SEENOTES26827)I3III31322IONIZATION(SEENOTE18)NONE6IONIZATIONDRYPILOTPREACTIONSPRINKLERSYSTEM(SEENOTE18)NONEDRYPILOTPREACTIONSPRINKLERS1-1/2(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-11-HV-AES-11-HV-AES-2MANUALWATERSPRAYFORCHARCOALFILTERUNITS4IONIZATIONNONE38.22.765.250,7923,71986,7253231,6241,6503,2002.82.3,2.82.3,2.102.2,2.3,2.10507IONIZATION,THERMISTORSIFORCHARCOALFILTERUNITS2-HV-AES-12-HV-AES-2MANUALWATERSPRAYFORCHARCOALFILTERUNITS33.244,3093,2002.2,2.3,2.10(THISFIREAREAISCONTINUEDONNEXTPAGE)EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE10OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA*EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBER515269I9IONIZATION(SEENOTE55)17IONIZATION28IONIZATION,THERMISTORSFORCHARCOALFILTERUNITS1-HV-CPR-12-HV-CPR-1DRYPILOTPREACTIONSPRINKLERS(SEENOTES1~3)DRYPILOTPREACTIONSPRINKLERS(SEENOTES1,3)MANUALWATERSPRAYFORCHARCOALFILTERUNITS16.27.92.221,65010,7172,9985.38611,08517~9142.2,2.3~2.5,2.102224252102.2.2.3.2.5,2.8,2.9,2.10,2.111061HEAT(FIXEDTEMP/RATEOFRISE)NONE12.616,77019222,2.101071461HEAT(FIXEDTEMP/RATEOFRISE)INONENONENONE10.849.114,37565,3562246262.3,2.102.8ISAMPLINGROOMEL.587'-0"3IONIZATIONNONETOTAL1-1/212.912.517,28316,75354,5901,0252.5,2.74EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE11OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS>>FIREAREA*EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFT2FIGURENUMBERAUXILIARYBUILDINGIEASTANDWESTEL.587'-0-(SEENOTES26827)I514IONIZATION,1THERMISTORFORCHARCOALFILTERUNIT12-HV-SATFUF(SEENOTE55)DRYPILOTPREACTIONSPRINKLERS(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)4IONIZATIONI(SEENOTE55)4IONIZATION(SEENOTE55)2IONIZATIONI2IONIZATIONNONEDRYPILOTPREACTIONSPRINKLERS(SEENOTE3)DRYPILOTPREACTIONSPRINKLERS(SEENOTES1,3)DRYPILOTPREACTIONSPRINKLERS(SEENOTES1,3)NONEDRYPILOTPREACTIONSPRINKLERS0.18.216.46.710.49.414311,02221,8929,03413,84612'4210,8906,0954,2126,0951,0003092.2,2.3.2.5,2.92.2,2.7,2.92.2,2.5,2.7,2.92.2.2.7,2.92.3,2.5,2.72.2,2.7(THISFIREAREAISCONTINUEDONNEXTPAGE)EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE12OF35

TABLE2-2FIRE.PROTECTIONFEATURESFORFIREAREAS*FIREAREA~EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTARE)FTFIGURENUMBER64865A6582IONIZATION2IONIZATION2IONIZATIONDRYPILOTPREACTIONSPRINKLERSDRYPILOTPREACTIONSPRINKLERSDRYPILOTPREACTIONSPRINKLERSTOTAL8.08.69.710,73911,51813,0088,94728830928838,1212.2.2.5~2.72.2,2.72'2-7iUNIT1QUADRANT1iCABLETUNNELIEL'96Ž3.5"I74IONIZATION3INFRAREDAUTOMATICC023(SEENOTES40AND63)87.5116,629960/2.3~2.7,2.8IIUNIT1QUADRANT4ICABLETUNNELIEL.596'"3.5"86IONIZATION5INFRAREDAUTOMATICCOZ1-1/2(SEENOTE40)23.130,8412,0502.3,2.4.2.7UNIT1QUADRANT3NAND3MCABLETUNNELS(SEENOTE27)9104IONIZATION3INFRARED4IONIZATION3INFRAREDAUTOMATICC02AUTOMATICCOZ1-1/2(SEENOTES23AND40)TOTAL54.878.368.972,856104,25091,6125398001,3392-2.2-I2.2,2.7EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE13OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA~EXISTINGDETECTIONMINIMUMRATINGOFFIREEXISTINGAREASUPPRESSIONIBOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERIIIUNIT1QUADRANT3SICABLETUNNELI113IONIZATION3INFRAREDAUTOMATICC021-1/2(SEENOTE40)19.726,3448402.2,2.7!UNIT1QUADRANT2IPIPINGTUNNELI12NONENONE1-1/2(SEENOTES2,5AND40)I1.21,7227,8122.2,2.3,2.4,2.6,2.7,2.8,2.9,2.10UNIT1DIESELOILIPUMPROOMIII13IIIUNIT1TRANSFORMERROOMI1THERMISTORAUTOMATICC023(SEENOTE6)19.125,4696212.2,2.71412IONIZATIONNONE1-1/2(SEENOTE43)I(SEENOTE6)0.81,0562,0722'.2.7IUNIT1CDDIESELROOMEL.587'-0"152THERMISTORSAUTOMATICC021-1/2127.0169,0142,1562.2,2.4,2.7UNIT1ABDIESELROOMEL.587'-0"162THERMISTORSAUTOMATICCOZ1-1/2124.0165,0282.2332.2,2.4,2.7EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE14OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS>>FIREAREASIUNIT1WESTAFWPUMPROOM17AIUNIT2WESTAFWPUMPROOMmI178IIAFWPUMPCORRIDOR17CIsUNIT1EASTAFWPUMPROOM17DIIUNIT1TURBINE-DRIVENAFWPUMPROOM17EEXISTINGDETECTIONNONENONE2IONIZATIONINONENONEEXISTINGSUPPRESSIONNONENONEWETPIPESPRINKLERSNONEWETPIPESPRINKLERS'INIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(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-DRIVENAFWPUMPROOM17FNONEWETPIPESPRINKLERS3(SEENOTE41)0.81,0342192.1,2.5,'.7IUNIT2EASTAFW1PUMPROOMII17GINONENONE0.81,0042192.1,2.5,2.7EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE15OF35 TA-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA*IIIUNIT2CDDIESELiROOMEL.587'-0"18EXISTINGDETECTION2THERMISTORSEXISTINGSUPPRESSIONAUTOMATICC02MINIMUMRATINGOFFIREAREABOUNDARIES1-1/2EQUIVALENTFIRESEVERITY(MINUTES)122.2FIRELOADBTU/FT162,647AREAFT22,250FIGURENUMBER2.2,2.5,2.7UNIT2ABDIESELROOMEL.587'-0"192THERMISTORSAUTOMATICC021-1/2122.2162,6562,2502.2,2.7IUNIT2TRANSFORMERROOMII20II12IONIZATIONNONE1-1/2(SEENOTE44)(SEENOTE7)1.01,5032,0722IIUNIT2DIESELOILPUMPROOM21lIIUNIT2QUADRANT2PIPINGTUNNEL221THERMISTORINONEAUTOMATICCOZNONE3(SEENOTE7)1-1/2(SEENOTES2,8AND40)21.00.628,0631,0225618,4602',2'2.2,2.3,2.6,2,7,2.8,2.9,2.10UNIT2QUADRANT3NCABLETUNNEL233IONIZATION3INFRAREDAUTOMATICC021-1/2(SEENOTE40)21.528'168402',2.7EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIRFZPNFS.PAGE16OF35 TAB-2FIREPROTECTIONFEATURESFORFIREAREAS*CFIREAREA~EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTIFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFTFIGURENUMBERUNIT2QUADRANTI3MAND3SCABLEjTUNNELS(SEENOTE27)24254IONIZATION3INFRARED4IONIZATION3INFRAREDIAUTOMATICC02AUTOMATICC021-1/2(SEENOTES24AND40)58.745.978,08361,1328005672'.2.72TOTAL53.371,0511,367UNIT2QUADRANT4CABLETUNNELEL.596'-3.5"266IONIZATION5INFRAREDAUTOMATICC021-1/2(SEENOTE40)15.921,0862,7462.7UNIT2QUADRANT1CABLETUNNELEL.596'-3.5"274IONIZATION3INFRAREDAUTOMATICC02363.9(SEENOTE40)I85,0091,0562.3,2.7.2.8EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE17OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*IIIIFIREAREAiEXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTIFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFTFIGURENUMBERESSENTIALSERVICEWATERPUMPSAREAI29A29829C29029E29F29G4IONIZATION4IONIZATION4IONIZATION4IONIZATION1IONIZATION1IONIZATION4IONIZATIONNONE(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'EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE18OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA%'XISTINGDETECTIONEXISTINGSUPPRESSIONIMINIMUMRATINGOFFIREAREABOUNDARIESEQUiVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERIUNIT1EASTMAINSTEAMVALVEENCLOSUREANDCONTRACTORSACCESSCONTROL~AREA(SEENOTE27)3333A24IONIZATION4INFRARED3IONIZATION,10INFRARED,1THERMISTORFORCHARCOALFILTERUNIT1HV-CIPX-1NONE(SEENOTE48)MANUALWATERSPRAYFORCHARCOALFILTERUNIT(SEENOTE48)1-1/2(SEENOTES5,36,40AND58)12.06.716,1189,1291,0403,2162.4,2.8.2.10,2.112.2,2.3,2.83382IONIZATIONINONE(SEENOTE48)0.22366002.2,2.8105NONEWETPIPESPRINKLERS11.715.6192,3802.2,2.4.2.8TOTAL8.511,5307,236EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE19OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS'IREAREA*EXISTINGDETECTIONMINIMUMRATINGOFFIREEXISTINGAREASUPPRESSIONiBOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERUNI-2EASTMAINSTEAMVALVEENCLOSURE3434A34824IONIZATION4INFRARED3IONIZATION~10INFRARED,1THERMISTORFORCHARCOALFILTERUNIT2-HV-CIPX-12IONIZATIONNONE(SEENOTE49)MANUAL'LVATERSPRAYFORCHARCOALFILTERUNIT(SEENOTE49)NONE(SEENOTE49)1-1/2(SEENOTESB,I40AND59)TOTAL8.33.14.34.311,2874,2045.7355,9091,0403,2166004,8562.8.2.10,2.112.2.2.3.2.82.2.2.8EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEYIITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE20OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS%FIREAREAR'XISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFTFIGURENUMBERAUXILIARYBUILDINGI*NORTHANDSOUTHEL.609'-0"(SEENOTE27)373IONIZATION(SEENOTE55)NONE1-1/2(SEENOTES1,2.4,"11,12,13,25'8,30,32.38,39,50,53AND64)2,7302.3,2.5.2.84344A44844C44044E44F44G44H44N24IONIZATIONNONEINONEIINONENONENONENONENONENONENONEINONENONENONEIINONENONENONENONENONE19IONIZATIONIDRYPILOT(SEENOTE55)PREACTIONSPRINKLERS(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)DRYPILOTPREACTIONSPRINKLERS(SEENOTES1.3,10)TOTAL14.225.819,19234,4829,36026,2612.2.2.8EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE21OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA4'XISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERUNIT1QUADRANT2CABLETUNNELEL.612'-0"I38IUNIT2QUADRANT2CABLETUNNELEL.612'-0"!397IONIZATION4INFRARED7IONIZATION4INFRAREDAUTOMATICC02AUTOMATICC021-1/2(SEENOTE40)1-1/2(SEENOTE40)31.023.041,28830;6222,6502,6672.2,2.3,2.8~2.92.2,2.3,2.8,2.9IUNIT14IcvSWITCHGEARROOMSIEL.609'-0"I40AI4082IONIZATION3INFRARED2IONIZATION3INFRAREDAUTOMATICC02AUTOMATICC021-1/2(SEENOTE14)15.513.620,61618,1441,4761,4402.2~2.82.2,2.8TOTAL14.619,3942,916IUNIT1ENGINEEREDISAFETYSYSTEMS!ANDMCCROOMEL.609'-0"41II9IONIZATION(3UNDERFLOOR)5INFRARED(2UNDERFLOOR)AUTOMATICC021-1/2(SEENOTE15)20.727,6143.0962.2,2.4,2.8EACHFIREAREAIS"SEPARATEDBYASOLIDHORIZONTALLINEVIITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE22OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREASFIREAREAR'EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFTFIGURENUMBERUNIT1EMERGENCYPOWERSYSTEMSAREAEL.609'-0")I!42AI42842C2IONIZATION2INFRARED2IONIZATION1INFRARED3IONIZATION2INFRAREDAUTOMATICC02AUTOMATICC02AUTOMATICC021-1/23.77.31.85,0809,7122,392.-1,2099225302.2,2.4,2.82.4,2.82.2,2.4,2.84202IONIZATIONNONE33.544,5835032.2.2.4.2.8TOTAL9.212,2583,164IIUNIT2ENGINEEREDiSAFETYSYSTEMS!ANDMCC*ROOM!EL.609-0"g459IONIZATION(3UNDERFLOOR)5INFRARED(2UNDERFLOOR)AUTOMATICC021-1/2(SEENOTE16)23,4432,8842.2,2.5,2.6,2.8EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE23OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*IFIREAREA*IIIIUNIT2EMERGENCYIPOWERSYSTEMSIAREAEL.609'-0"II46A46846CEXISTINGDETECTION2IONIZATION2INFRARED2IONIZATIONINFRARED3IONIZATION2INFRAREDEXISTINGSUPPRESSIONAUTOMAT1CC02AUTOMATICCOZAUTOMATICC02MINIMUMRATINGOFFIREAREABOUNDARIES1-1/2EQUIVALENTFIRESEVERITY(MINUTES)3.58.34.0FIRELOADBTU/FT4,79311,1505.502AREAFT1,209922530FIGURENUMBER2.2,2.6,2.82.5,2.82.2,2.5,2.84602IONIZATIONNONE30.039,9735032.2,2.5,2.8IIUNIT24RVISWITCHGEARROOMSEL.609'-0"47A4782IONIZATION3INFRARED2IONIZATION3INFRAREDAUTOMATICC02AUTOMATICC02TOTAL1-1/2(SEENOTE17)9.214.412.912,35619,15817.1363,1641,4761,4402.2.2.82.2,2.8TOTAL13.618,1592,916EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE24OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*!FIREAREA*IIiUNIT1CONTROLROOM53EXISTINGDETECTION45IONIZATION(20ABOVECEILING)EXISTINGSUPPRESSIONNONE(SEENOTE51)MINIMUMRATINGOFFIREAREABOUNDARIES3(SEENOTES20AND21)EQUIVALENTFIRESEVERITY(MINUTES)21.2FIRELOADBTU/FT28,225AREAFT24,410FIGURENUMBER2.2,2.5.2.10IUNIT2CONTROLROOM5441IONIZATION(17ABOVECEILING)NONE(SEENOTE52)3"(SEENOTES21.22AND29)22.630,0694,4102.2,2.10UNIT1SWITCHGEARROOMCABLEVAULT5513IONIZATION10INFRAREDAUTOMATICCO2(NOTINBATTERYROOM)3(SEENOTES14AND15)25.133,5369,0862.2,2.4,2.9UNIT1AUXILIARYICABLEVAULTI6IONIZATIONIAUTOMATICC021-1/2I(SEENOTE13)51.168,1201,7832.2~2.4.2.9EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE25OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS~~FIREAREA*EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERIUNIT1CONTROLIROOMCABLEVAULTIANDHOTSHUTDOWNPANELAREAI(SEENOTE26)I57II14465IONIZATION1IONIZATIONAUTOMATICHALON1301,MANUALC02NONE1-1/2(SEENOTE20)77.8103,5904,410892.2,2.5,2.92.10IUNIT2CONTROLIROOMCABLEVAULTANDHOTSHUTDOWNPANELAREAI(SEENOTE26)5814576IONIZATION1IONIZATIONAUTOMATICHALON1301,MANUALC02NONETOTAL3(SEENOTE22)76.374.7101,54199,3444.4994,410892.2,2.92.10TOTAL73.297.3794,4ggEACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE26OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*IIIIIFIREAREA*IIIUNIT2AUXILIARYCABLEVAULTEXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBER596IONIZATIONIAUTOMATICIC021-1/2(SEENOTE19)40.754.2371,7012.2,2.9UNIT2SWITCHGEARROOMCABLEVAULT6013IONIZATIONI10INFRAREDAUTOMATICC02(NOTINBATTERYROOM)3(SEENOTES16ANO17)19.025,4879,1632',2.5.2.9IUNIT1CHARGINGPUMPROOMSII62A62B62C2IONIZATION2IGNIZATION2IONIZATIONDRYPILOTPREACTIONSPRINKLERSDRYPILOTPREACTIONSPRINKLERSDRYPILOTPREACTIONSPRINKLERS3(SEENOTES2,4AND25)26.222.324.535,03429,79032,6564364164162.5,2.72.5,2.72.2,2.5,2.7TOTAL24.432,5381,270EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE27OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*IFIREAREAi'XISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBERlUNIT2CHARGING!PUMPROOMSI63A63B2IONIZATIONIDRYPILOTPREACTIONSPRINKLERS2IONIZATION(DRYPILOTPREACTIONSPRINKLERS3(SEENOTES2,4AND3B)25.124.133,42632,1494384162.72.763C2IONIZATIONDRYPILOTPREACTIONSPRINKLERS23.231,02241622,2'TOTAL24.132,2171,270EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE28OF35 TABLE2"2FIREPROTECTIONFEATURESFORFIREAREAS~FIREAREAR'XISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2,ARE)FTFIGURENUMBERIUNIT1ICONTAINMENT(SEENOTE26)666768101103THERMISTORSFORCABLETRAYSTHERMISTORSIFORREACTORCOOLANTPUMPS,FORCABLETRAYS,ANDFORCHARCOALIFILTERUNITS1-HV-CFT-11-HV-CFT-2THERMISTORSFORCABLETRAYSTHERMISTORSIFORCABLETRAYSTHERMISTORSFORCABLETRAYSNONEAUTOMATICWATERSPRAYSYSTEMFORBOTHCHARCOALFILTERUNITS,MANUALWATERSPRAYSYSTEMFORRCPsNONENONENONE19.258.43.528.94.925,59377,6394,61138,4836,5294'663,6486,3161,2306152.3,2.4,2.72.3,2.4.2.7.2.8.2.10.2.112.2,2.3.2.4~2.102.112.4,2.82.3,2.4.2.7.2.8118120122132134NONENONENONENONENONENONEIfNONENONFNONENONE7.416.36.89,9225,75121,7109,1602302.85803,5066652.3,2.82.3.2.4,2.10,2.112.3.2.4~2.6.2.72,5802.3.2.4.2.8TOTAL16.822,60823,536EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE29OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS*FIREAREA%EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBER!HVACEQUIPMENTANDCOMPUTERIROOMS7071727312IONIZATION(6INDUCTS)THERMISTORFORCHARCOALIFILTERUNIT1-HV-ACRF-1ALARMONLY(HIGHVOLTAGE)4IONIZATION(2UNDERFLOOR)HALONACTUA-TIONN(LOWVOLTAGE)6IONIZATION(3UNDERFLOOR)lALARMONLY(HIGHVOLTAGE)4IONIZATION(2UNDERFLOOR)HALONACTUA-TION(LOWVOLTAGE)6IONIZATION(3UNDERFLOOR)12IONIZATION(6INDUCTS)1THERMISTORFORCHARCOALFILTERUNI~2-HV-ACRF-1MANUALWATERSPRAYFORCHARCOALFILTERUNITAUTOMATICHALON1301AUTOMATICKALON1301MANUALWATERSPRAYFORCHARCOALFILTERUNIT3(SEENOTES21,29AND62)8.287.5106.47.111,187116,545141,6079.4691,7154304301,7702.2,2.5.2.112.2,2.5,2.112.2,2.112.2,2.11TOTAL25.333,820'4,345EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE30OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS+FIREAREA~EXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTIFIRESEVERITY(MINUTES)FIRELOADBTU/FTAREAFT2FIGURENUMBER!UNIT2CONTAINMENT(SEENOTE26)I74THERMISTORSINONEFORCABLETRAYS23.130,7394,1662-3.2.775THERMISTORSFORREACTORICOOLANTPUMPS,FORCABLETRAYS,ANDFORCHARCOALFILTERUNITS2-HV-CF7-I2-HV-CFT-2AUTOMATICWATERSPRAYSYSTEMFORBOTHCHARCOALFILTERUNITS,MANUALWATERSPRAYSYSTEMFORRCPs62.182,5623,6482.3,2.7.2.8.2.10.2.1176THERMISTORSINONEFORCABLE"'RAYS4,4676,316I2.2,2.3.2.10,2.III102THERMISTORSFORCABLETRAYSNONE20.627,4141,230104THERMISTORSINONEIFORCABLETRAYS5.57,3286152.3,2.7.2.8119121123133135NONENONENONEINONEINONEINONENONENONENONE4.92.29.06.86,4812,99312,0279,1602305803,5066652.3.2.82.3.2.10,2.112.3,2.6-2,5802.3,2.8TOTAL17.223,11223,536EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE31OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS~FIREAREAREXISTINGDETECTIONEXISTINGSUPPRESSIONMINIMUMRATINGOFFIREAREABOUNDARIESEQUIVALENTFIRESEVERITY(MINUTES)FIRELOADBTU/FT2AREAFTFIGURE'"NUMBERUNIT1TANKAREAPIPETUNNEL116NONENONE3(SEENOTE5)0.24371,7242.2,2.3,2.4,2.7IUNIT2TANKAREAIIPIPETUNNEL117NONENONE3(SEENOTE8)0.45151,7242.2,2.3,2.7EACHFIREAREAISSEPARATEDBYASOLIDHORIZONTALLINEWITHSOMEFIREAREASCONSISTINGOFMULTIPLEFIREZONES.PAGE32OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREASNOTES(1)CLOSE-SPACEDDRYPILOTPREACTIONSPRINKLERSAROUNDPERIMETEROFSTAIR(S)ATCEILINGLEVEL(2)SEESECTION9.4FORBOUNDARYEVALUATIONOFVERTICALAIRSHAFTS(FIREAREAS12AND22)(3)DRYPILOTPREACTIONSPRINKLERSINNORMALLYACCESSIBLEPORTIONSOFTHEFIREZONE(4)SEESECTION9.6FORBOUNDARYEVALUATIONOF6APIPETUNNEL(5)SEESECTION9.23FORBOUNDARYEVALUATIONOFFIREAREA116(6)SEESECTION9.7FORBOUNDARYEVALUATIONOFFIREAREAS13AND14(7)SEESECTION9.8FORBOUNDARYEVALUATIONOFFIREAREAS20AND21(8)SEESECTION9.24FORBOUNDARYEVALUATIONOFFIREAREA117(9)SEESECTION9.25FORBOUNDARYEVALUATIONOFESWPUMPSFIREAREAANDHATCHEVALUATIONBETWEENFIREZONE29CANDFIREZONE29G(10)CCWPUMPCOVERAGETOPROTECTBEARINGS(11)SEESECTION9.21FORDOOREVALUATIONBETWEENFIREZONE43ANDFIREZONE110(12)SEESECTION9.22FORDOOREVALUATIONBETWEENFIREZONE44SANDFIREZONE111(13)SEESECTION9.14fORHATCHEVALUATIONBETWEENFIREZONE43ANDFIREAREA56(14)SEESECTION9.15FORHATCHEVALUATIONBETWEENFIREZONE408ANDFIREAREA55(15)SEESECTION9.16FORHATCHEVALUATIONBETWEENFIREAREA41ANDFIREAREA55(16)SEESECTION9.19FOR(17)SEESECTION9.20FORHATCHEVALUATIONBETWEENFIREAREA45ANDFIREAREA60HATCHEVALUATIONBETWEENFIREZONE478ANDFIREAREA6D(18)NOTINDRUMSTORAGE(19)SEESECTION9.18FORHATCHEVALUATIONBETWEENFIREZONE52ANDFIREAREA59(20)SEESECTION9.13FORHATCHEVALUATIONBETWEENFIREAREA53ANDFIREAREA57PAGE33OF35 TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)SEESECTION9.5FORHATCHEVALUATIONBETWEENFIREAREAS53AND54ANDFIREZONES70AND73SEESECTION9.17FORHATCHEVALUATIONBETWEENFIREAREA54ANDFIREAREA58SEESECTION9.26FORBOUNDARYEVALUATIONOFFIREAREA9ANDFIREAREA10SEESECTION9.27FORBOUNDARYEVALUATIONOFFIREAREA24ANDFIREAREA25SEESECTION9.31FORUNIT1LEAKAGEDETECTIONBOXEVALUATIONTHISFIREAREACONTAINSADDITIONALFIREZONESWHICHWEREPREVIOUSLYUNIDENTIFIEDTHISFIREAREACONTAINSADDITIONALFIREZONESWHICHWEREPREVIOUSLYIDENTIFIEDASSEPARATEFIREAREASEESECTION9.1FORDUCTEVALUATIONBETWEENFIREZONE43ANDFIREZONE91SEESECTION9.2FORDUCTEVALUATIONBETWEENFIREAREA54ANDFIREZONE73SEESECTION9.3FORDUCTEVALUATIONOFCCWPUMPSSEESECTION9.9FORBOUNDARYEVALUATIONOFFIREAREACONTAININGFIREZONES3,32,36,48AND69WITHFIREAREACONTAININGFIREZONES49,50,51AND52SEESECTION9.10FORBOUNDARYEVALUATIONBETWEENFIREZONE43ANDFIREZONE44NSEESECTION9.11FORBOUNDARYEVALUATIONBETWEENTURBINEBUILDING,SERVICEBUILDINGANDMAINSTEAMPIPETUNNELSSEESECTION9.12FORBOUNDARYEVALUATIONBETWEENTURBINEBUILDINGANDSCREENHOUSESEESECTION9.28FORBOUNDARYEVALUATIONBETWEENFIREAREA61ANDFIREZONE5SEESECTION9.29FORBOUNDARYEVALUATIONBETWEENFIREAREA105ANDFIREZONE33ASEESECTION9.30FORBOUNDARYEVALUATIONBETWEENFIREAREACONTAININGFIREZONES3,32,36,48,49,50,51.52.69ANDFIREAREAS31,35.106,107AND146SEESECTION9.32FORUNIT2LEAKAGEDETECTIONBOXEVALUATIONSEESECTION7.13FORAUXILIARYBUILDINGHVACDUCTPENETRATIONEXEMPTIONSEESECTION7.14FORSEISMICGAPEXEMPTIONFLOORDRAINAGEOPENINGFROMFIREAREA17FTOFIREZONE2BELOWSEESECTION7.2FORFUlLAREASUPPRESSIONEXEMPTIONSEESECTION7.3FORFIXEDSUPPRESSIONEXEMPTIONSEESECTION7.4FORFIXEDSUPPRESSIONEXEMPTIONPAGE34OF35

TABLE2-2FIREPROTECTIONFEATURESFORFIREAREAS(45)SEESECTION7.5FORFIXEDSUPPRESSIONEXEMPTION(46)SEESECTION7.6FORFIXEDSUPPRESSIONEXEMPTION(47)SEESECTION7.7FORFULLAREASUPPRESSIONEXEMPTION(48)SEESECTION7.8FORFIXEDSUPPRESSIONEXEMPTION(49)SEESECTION7.9FORFIXEDSUPPRESSIONEXEMPTION(50)SEESECTION7.10FORONE-HOURBARRIEREXEMPTION(51)SEESECTION7.11FORFIXEDSUPPRESSIONEXEMPTION(52)SEESECTION7.12FORFIXEDSUPPRESSIONEXEMPTION(53)AUXILIARYBUILDINGPASSENGERANDFREIGHTELEVATORDOORSARECLASS8(54)CONTROLLEDACCESSTOEACHFIREZONEISVIALOCKEDSCREENMESHGATE(55)DETECTIONCOVERAGEDOESNOTEXTENDINTOZONECUBICLESCONTAININGRADIOACTIVEEQUIPMENTLOCATEDBEHINDSHIELD"!A'SWITHCONTROLLED-ACCESSSCREENMESHGATES(56)SEESECTION9.33FORBOUNDARYEVALUATIONOFFIREZONE6ATOFIREZONE1388(57)SEESECTION9.34FORBOUNDARYEVALUATIONOFFIREZONE36TOFIREZONE5(58)SEESECTION9.35FORBOUNDARYEVALUATIONOFFIREZONE33ATOFIREZONE108(59)SEESECTION9.36FORBOUNDARYEVALUATIONOFFIREZONE34ATOFIREZONE109(60)SEESECTION9.37FORBOUNDARYEVALUATIONOFFIREZONE5TOFIREZONE32(61)SEESECTION9.38FORBOUNDARYEVALUATIONOFFIREZONE69TOFIREZONES108AND109(62)SEESECTION9.39FORBOUNDARYEVALUATIONOFFIREZONE70TOFIREZONE129(63)SEESECTION9.40FORBOUNDARYEVALUATIONOFFIREZONE7TOFIREZONE61(64)SEESECTION9.41FORBOUNDARYEVALUATIONOFFIREZONES44NAND37TOFIREZONE51PAGE35OF35

TABLE2-3MAXIMUMALLIABLECOMBUSTIBLELOADINGFORFIREZONESINVOLVEDINEXEMPTIONAND/OREVALUATIONFireZone(s)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/ftMinutelA1BlE1F138BlA;1B,lCand1DlE,lF,1Gand1H138A,138Band138Cl,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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/ftMinute91108Fixed108Transient109Fixed.109Transient110Fixed110TransientillFixedillTransient139140141142143~25,87510,18715,8728038383,6982,19625,65219.47.611.80.60.62.61.51953,00027,00013,00033,00013,00027,00013,00027,00013,00013,00033,00033,00053,00013,0004020102510201020101025254010ENDOFFIRE'REA*FireZone(s)aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page2of14 TABLE2-3(continued)FireZone(s)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllovableCombustibleLoadinBtu/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)ExistinCombustibleLoadinMaximumAllowableCombustibleLoadinFireZone(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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadin'tu/ftMinute116,62987.5133,000100ENDOFFIREAREA30,84123.147,00035ENDOFFIREAREA10104,25078.3120,00090ENDOFFIREAREA26,34419.740,00030ENDOFFIREAREA1217221.220,00015ENDOFFIREAREA*FireZone(s)aregroupedtogetherbyfireareasimilartoTables1-1and2-2Page5of14

TABLE2-3(continued)ExistinCombustibleLoadinMaximumAllowableCombustibleLoadinFireZone(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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllovableCombustibleLoadinBtu/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)*ExistinCombustibleLoadinBtu/ft,MinuteMaximumAllowableCombustibleLoadinBtu/ftMinute44A,44B,44Cand44D44E,44F,44Gand44H37,44A44H,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)ExistinCombustibleLoadinMaximumAllowableCombustibleLoadinFireZone(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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/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)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/ftMinute57103,59077.8120,00090ENDOFFiREAREA5899,34474.7113,00085ENDOFFIREAREA54,23740.767,00050ENDOFFIREAREA6025,4871940,00030ENDOFFIREAREA62A,62Band62C32,53824.447,00035ENDOFFIREAREA*FireZone(s).aregroupedtogetherbyfireareasimilartoTablesl-land2-2Page13of14 TABLE2-3(continued)FireZone(s)*ExistinCombustibleLoadinBtu/ftMinuteMaximumAllowableCombustibleLoadinBtu/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.Fl.EL.GODEL.ELITIOTI.mERTURECARDAlsoAvai4hleOaApcttRf6CazjfHTLC';9~79'STRAIN\itsLOWDRMANDFIRCPUMtttEILNICNDCMANDPIRCPVMPIISIPLUNllHoITTLZCONSULTATIONRll.CONTRCTLROOIaLHVACEOUIP.AREACLNLERRELEV.TLALTLRUNllNOZTBCCONSOLSRDORTVSCCOIOLPVT5LZROOMLTCI129"lj,eutaA.I91ICEDIenIAFN(IIROI.CO4PR.IflP.96LANTal'ILCONTTLttffRTURD.DRIVCNIEFCCD177E117FGMOTORELFCCDPU~RLTLCPILNICAPItLFIPtPIOTTCTIONPtsrroPIMPHISC.DRAINTANKSIISO.DRAINTANKES,ISSI>>TILLRTTICts~cTiow'c-c.'"O'TRAI4CltCLSDSICSMltNDRMANDDIRCCOLIMPNUTERDCLNPPCFSPLIJ7130'IfttEe9O-4fRlLL.-3I85+IIIIIIIIIIIILBLAEN6)II,5ICSR>5%tstsaJlistKEYPLANNsttl5I~~an----JSISIaltnail851stJJJJ4P3VTLLTH!1UTJLTN!'ERANTNtATISCILERSTACKROOFttDSOTI131tlCa4.MAIIJHOOKAUX,CRAMFEtkCEXSlut129T.FT.E.L.G3tfO)TCPCFRLLTLCSSLS'xlI."ATVRQITIECX5MaIIJCRaNE.TCPOICARTLCTCLIP~E..EXNCAVX.CRAPJEMATIluooKLEGEND~FIREAREAtLARRIERFIREZONELNRRIEFLEL59SLO'tgtu.EI5R.R.'TRACKTUtRAvc.cooNC-E9$0'9~~0~~~91~OFEEDPl'MPGoO'Ao=96.84@85~~~fIOl>>.ltdllI97MCCTLR.TACKeetttnLE<GOD!dy.'fVR5.AVK.COOLCOIJCLPITEL.579LO'43'NTAKE.TUNNELEL.SGSLOCLSTC.I'URLILJCROOMSVMP133EL571'~~'.Pl'TFCEOPUMPTURTNN'ECOND.tSSINTVLSLttnttNLTLRTVPPCTNDCSSE.GTlOhlB-BT0.'.'43'.l'NTAKETUNNELELSGS'TURS.AUX.COOLERR5.Avx.coaLINDpvupTURPJ.R.oolat4lI'CNCRALRCVE'Dtetl131TURbluERooM129l,PLANTNLATt>>ODORCeSTACK'aHTR.54YRODFELC9'-o~MO+ITILILE~P4RA'0129PLUHITLlt.1NTUSt1TfftE130Tvea,olt.TaNKsA0EukFLCLIoSS'4'30j11GIEHERALREVISlRCVISIONS'twlCatena4liefootcowCOMAC>>NcaacltclucICtettElattEIccel'ao~ECMOweaNaeltetMtlltlolt'NNaeeeaclo~acaffleweeetoowfaatooottofoafancenetafoaaaeoalolalflalooeeetteeeetltacoatcatofeeAIlRottucenooaweootttotMottewotfLtoeeatattotat~aotlNNettooacowetMtewCSAEFCU1';94'1KCLERIII93I-92-95URSOIL~LTCAONPATCTANE92IwAllttaf>>99100:I'"ttteE99~STE'AMJETAl98-EJECTORSRRTAatINDIANA~MICNICANCLCCTRICCO.DONALDC.COOKNUCLEARPLANTUDCNANIcK>>RAN784EJECTORSITL,~gpDRalCOOL'ERHEATLH6TSOILERCOHO.SOOSTERPUMPSPlIL.STS4143DSOLTUuutEL5CT'-9'~TAattI~IINP3tfCRTATLLs~l41VbOOM)RITINIK>>-8381MccUSEIOTSLTIRTC(CALIITKNTC)coeDENELTLcetaeItlDEL5775'IANEIPstae143ORAICOOLERSOM88886ILD.BOOSTERPUMPStt,TIAAE\89PLANTARRANGEMENTSECTLONSA-A,BB8CCoIUNITS182DRNOT2-516fa4CAUSTICSTOITAACTLNICDEMLH.CAUSTICPUMP140AcloSTDRAGETANLCststtuRLTNPUMPROOMluTAXETLPDELS8ECTION"A-ACATCONluTARETLPIILLStsst>>TIALsLITctE-AueuEtotucteDL'ttTEFRTNusQlscu.'TvNNcL-Figure2.1.Ff~AeeI~O\O~OErroleANCRKAICLCCTRCIONIACIRVICCCORA3SROADWATLtuVORCSV02190815-ET>

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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~'I4TOTALWALLTHICKNESSCOLDSIDEOFBARRIER~PERNFPAACHIEVESA11/2TO2HOURRATINGFORNORMALWEIGHTCONCRETE~COLDSIDEFAILURETEMPERATURESAPPROXIMATLY322oFFIGURE2.0-.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~JCOLDSIDEOFBARRIER44MINIMUMEMBEDDMENT12TO36TOTALWALLTHICKNESSFIGURE2.0-bFIGURES2;0-aAND2.0-bEMBEDDEDCONDUIT 3.DETECTIONANDSUPPRESSIONSYSTEMSSection3providesdetailedinformationonthedetectionandsuppressionsystemsinstalledattheD.C.CookNuclearPlant.Theinformationcontainedinthissecti'ongenerallypresentstheD.C.Cookplantconfigurationofeachfirezone'sfireprotectionfeaturesattheendofthe1986Unit2refuelingoutage.ThefireprotectionfeaturesincludemodificationsrequiredforcompliancewithAppendixRSectionIII.G,aswellasgeneralplantimprovementsinitiatedatthetimeofi'ssueofthisreport.TheseactivefireprotectionmeasurescomplementthepassiveprotectionprovidedbytheareaandzoneboundariesdiscussedinSection2.Inconjunctionwithothercomplementaryfeatures,theyprovideadditionaldefense-in-depththatensurethatexposure'fireswillbepromptlydetectedandextinguished.Inconjunctionwithadequatephysicalseparation,theyalsoprovideameansofcompliancewiththeprovisionsofAppendixRSectionIII.G.2.AtabulationbyfirezoneoftheinformationcontainedinthissectionisprovidedinSection2,Table2-2.3.1FireDetectionSstems3.1.1GeneralSstemInformationTheControlRoomsoftheD.C.CookNuclearPlant,whicharestaffed24hoursadaybytrainedpersonnel,functionastherequiredcentralsupervisingstationforeachunitattheplant.Page3-1 TheControlRoomsarecontainedwithinthree-hourfire-ratedconstructionwithappropriatedoorsanddampers,therebymeetingthelocationandseparationrequirementsforthecentralsupervisingstations.SeeSections9.2,9.5,9.13,and9.17fortechnicalevaluationswithrespecttounratedand/orunprotectedboundaryopeningsfortheControlRooms.Supervisorycapabilityisprovidedforthedetectionsystemstoindicatewhenmaintenanceofthesystemisrequiredforcircuitbreaksorgrounds.AllfiredetectionsystemsprovidebothaudibleandvisualalarmsonthefirealarmcontrolpanelintherespectiveControlRoom.AlarmsalsosoundinareaswhereeitherHalonorCarbonDioxidesuppressionsystemsareutilized.3.1.2SstemDescritionsThreemodesoffiredetectionareprovidedattheD.C.CookNuclearPlant.Theyareionizationsmokedetection,thermistorheatdetection,andinfraredflamedetection.Inaddition,therearespotlocationsprotectedbyheatdetectorswhichareelectricallyconnectedintotheionizationsmokedetection4systemsinspecificfireareas.Table2-2andFigures3-1through3-6identifythelocationsofthedetectionsystemsatD.C.Cook.Theionizationsmokedetectionsystemsaretheprimaryformoffiredetectionintheplant.InfraredflamedetectorsarecrossedzonedwiththesmokedetectionsystemsinsomefirezonesPage3-2 firezones,activationofboththesmokedetectionsystemandtheflamedetectionsystemarerequiredbeforeactuationofthesuppressionsystem.Theauxiliarycablevaultshaveonlyonezoneoffiredetection,whichalsoautomaticallyactuatestheC02gaseoussuppressionsystemslocatedtherein.Thermistordetectionsystemsareprovidedinanumberofafirezonesintheplant.Singlezonesofdetectionareprovidedforalarmpurposesonlyaroundtheturbinegenerators,reactorcoolantpumps,andthein-containmentcabletrays.Thermistordetectionandalarmisusedinandaroundsomepartsofthemainturbineswheremanualinitiationofwaterspraysuppressionsystemsprotecttheturbinesabovetheoperatingfloor.Thermistordetectionandalarm,withmanualinitiationofwaterspraysuppression,alsoprotectthereactorcoolantpumpslocatedinsidecontainment.SeveralCarbonDioxideSuppressionSystemsareautomaticallyactuatedbyonezoneofthermistordetection.SinglezonethermistordetectionisprovidedforalarmandautomaticactuationofC02suppressionsystemsfortheDieselFuelPumpRooms,LubeOilRooms,andTurbineOilTankRooms.TwozonesofthermistordetectionareprovidedforalarmandautomaticactivationofC02suppressionsystemsfortheDieselGeneratorRoomsofbothunits.Page3-3 Thecharcoalfilterunitsareprovidedwithasinglezonethermistordetectionsystem.Eachdetectionsystemhastwohightemperaturealarms.Uponreceiptofthehighertemperaturefirealarm,thesystemvalvewillbeautomaticallyopened.However,forthosesystemslocatedoutsideofcontainment,theshut-offvalveupstreamofthesystemvalvemustbemanuallyopenedbeforewaterwilldischargeintothewaterspraysystempiping.3.2FireSuressionSstems3.2.1GeneralSstemInformationAllautomaticsuppressionsystemsalarmbothaudiblyandvisuallyonthefirealarmcontrolpanelintherespectiveControlRoom.Supervisorycapacityisbuiltintothewatersuppressionsystemsintheformofposition-indicatingtamperswitchesonallshut-offvalvesforindividualsystems.Whenthesevalveschangefromtheirnormalpositionbeyondaspecifiedlimit,analarmsoundsbothaudiblyandvisuallyintherespectiveControlRoom.Supervisorycapabilityisprovidedonrelays,isolationswitches,andhighorlowtankpressurefortheCarbonDioxidesystems.The,solenoidvalvesforreleaseofthemainHalontanksprotectingtheCableSpreadingRoomsarealsosupervised.Page3-4

~~3.2.2SstemsDescritionThreebasicmodesoffiresuppressionareprovidedattheD.C.CookNuclearPlant.Theyarewater,Halon,andcarbondioxidesuppressionsystems.Eachisdescribedindetailbelow,,withsystemlocationsindicatedinTable2-2andidentifiedonFigures3-1through3-6.3.2.2.1WaterSuressionSstemsWatercanbeappliedtoanypotentialfireinprotectedareasbyoneormoreoffourtypesofwatersuppressionsystems.Theseare:(1)Automaticwetpipesprinklersystems(2)Drypilotpreactionsprinklersystems(3)Waterspraysuppressionsystems(manualandautomatic)(4)ManualhosestationsThewatersupplyforthesesuppressionsystemsforbothunitsoftheplantisthroughacommonsupplyheader.ThisinteriorsupplyheaderisalsointerconnectedwiththeyardmainI'eaderbysealed-opensectionalizingvalves.Eachinteriorsuppressionsystem,withtheexceptionofthecharcoalfiltersuppressionsystemsoutsideofcontainment,isequippedwithnormallyopen,manualshut-offvalvesandisinstrumentedwithwaterflowindicatorstoprovideaudibleandvisualannunciationintherespectiveControlRoom.Eachunitisequippedwitha2000-gpmelectricmotor-drivenfirepumpanda2000-gpmdieselPage3-5 motor-drivenfirepump.Inaddition,asingle500-gpmelectricmotor-drivenfirepumpisprovidedtohandlewaterflowrequirementsoflessthan500-gpminbothunits.Allfivepumpsareelectricallyindependenttoensurethatfailureofanypumpwillnotimpairthereliabilityofthewatersuppression'ystems.Withregardtofirepumpsequencing,whenahighdemandsystemoperates,thefire.pumpsarestartedthroughthehighdemandlogicsystem.Thefirstpumptostartwillbethehighdemandelectricmotor-drivenpumpintheunitrequiringwatersuppression.Iftheelectricmotor-drivenpumpfailstooperate,orifadditionalcapacityisneeded,theheaderpressurewillfallbelowasetpointandthediesel-drivenpumpinthesameunitwillstartthroughthelogicsystem.Ifmorecapacityisstillneeded,assensedbyheaderpressure,theelectricmotor-drivenfirepumpintheotherunitwillstart.Ifstillmorecapacityisneededtomaintainheaderpressure,theremainingdiesel-drivenpumpoftheotherunitwillstart.Ifadequateheaderpressureisstillnotmaintainedbythefourhighdemandfirepumps,theelectricmotor-drivenlowdemandfirepumpkwillstart.Lowpressuresensingdevicesareinstalledinthemaininteriorsupplyheadertoensurethat,iffire-fightingwaterflowsgreaterthan2000-gpmarerequired,(themaximumsingledemandis3700-gpmfortheUnitlmaintransformerandTurbineBuildingwall),additionalpumpingcapacitywillautomaticallybeprovidedtomaintainheaderpressure.Page3-6 Pumpconnectionstotheinteriorandyardloopheadersarewidelyseparated.The=diesel-drivenpumpsareonoppositeendsoftheintakescreenhouse(FireZones28and30)andtheelectricmotor-drivenpumpsareonoppositeendsofthepumppitwithinFireZone2oftheTurbineBuilding.Powersuppliesforthepumpsarefromseveralsources.Theelectricpumpsaresuppliedfrommetalcladswitchgearandmotorcontrolcenterswhicharesuppliedfromalternatesources.Eachdiesel-drivenpumphastwoindependentstartingbatterysources,eachwithitsownchargingequipmentandwithautomaticand/ormanualthrowover.Eachdiesel-drivenpumpislocatedinitsownthree-hour-ratedroom.Similarisolationoftheelectricmotor-drivenpumpsisnotnecessary,duetothelackoffireexposureandspatialseparationinthepumppitarea.Boththeelectricanddiesel-drivenpumpshaveavailablerunning,electricpower,andstrainerconditionindicationalarmsintheirrespectiveControlRooms.Thediesel-drivenpumps,inaddition,haveenginesupervisoryinformationsuchascoolantover-temperature,failuretostart,engineoverspeed,andlowoilpressurealarmintherespectiveControlRoom.Thewetpipe,preactionandwaterspraysprinklersystemsaretheprimaryformsofautomaticallyapplyingwateronafire.Adrypilot,preactionsprinklersystemdiffersfromawetpipe'systemonlyinthatautomaticdetectionbythepilotsystemisrequiredbeforewaterwillenterthepipenetworkinthearea.Page3-7 Boththepilotpipingandsprinklerpipingheadsarenormallyclosed;however,thepilotpipingheadsrequirealowertemperaturetooperate.'Thiswillcausetheoperationofthepneumatically-operatedsystemdelugevalve,allowingwatertoentersprinklerpiping.Atthispoint,thedrypilotsprinklersystemfunctionsjustlikeawetpipesprinklersystem.Upondetectionofahighertemperaturebysprinklerpipingheads,thesystemdischargeswaterontothefirethroughthesprinklerpipingheadsthathavenowoperated.Inaddition,specificareasand/orequipmentareprotectedbyautomaticand/ormanualfixed-Pwaterspraysystems.Theoutsidecontainmentcharcoalfilterunits'ixed-watersuppressionsystemhasbeenmodifiedtobeequippedwithanormallyclosedmanualshut-offvalve,locatedupstreamofthesystemvalve.Thismodificationhasbeeninitiatedatthetimeofissueofthisreport.Eachautomaticpreactionsprinklerandfixed-waterspraysystemalsocanbeoperatedmanually.Manualfire-fightinghosestationsaretheprimarybackuptotheautomaticand/ormanualwatersuppressionsystems.Hosestationsarelocatedinplantareasoutsidecontainment(suchasItheTurbineandAuxiliaryBuildings).Additionalhosestations~'relocatedataccessareastotheControlRooms,ControlRoomcablevaults,theauxiliarycablevaults,thecontainmentcabletunnels(withhosestationsalsolocatedwithinthetunnels),upperandloweraccesstothecontainments,thedieselgeneratorsandtheemergencypowersystemareas.Page3-8 3.2.2.2CarbonDioxideSuressionSstemsAreasindicatedinTable2-2thatareprotectedbycarbondioxidesystemshaveboundarypenetrations(i.e.,dampers,seismicgaps,andopeningsaroundcables,conduitsandpipes)sealedtoensureretentionofthecarbondioxideconcentrations.Insomefireareas,however,dampershavenotbeenprovidedforductworkthatcommunicatesdirectlywiththeplantexteriororpassthroughotherareaswithinratedconstructionboundariestotheplantexterior.FortheC02systemsinthesefireareas,concentrationtestshave.beenperformedwhichdemonstratethattherequiredconcentrationlevelscanbemaintainedwithoutdampers.Theaffectedfirezonesinwhichthissituationexistsare40A,40B,41,42A,45,46A,47Aand47B.Adischargedelaytimewithaudiblealarm(forautomaticsystemactuationonly)isincorporatedintoeachsystemdesigntoallowpersonneltimetoleavethearea.Thisisnecessaryduetothehealthhazardsassociatedwithachievingtheconcentrationlevelsofcarbondioxiderequiredtoextinguishthefire.Carbondioxidesuppressionsystemscanbeactivatedbothautomaticallyandmanually.TheC02suppressionsystemscanbeactivatedautomaticallybyoneofthefollowing:(1)Singlezoneionizationsmokedetection(2)Singlezonethermistordetection(3)Twozonesofthermistordetection(4)OnezoneofionizationandonezoneofinfraredflamedetectionPage3-9 Shouldalossofpowerpreventthesystemfromautomaticallydischarging,thefourmastervalvesonthe17-toncarbondioxidestoragetank,locatedinFireZone44N,willfailintheopenposition,therebychargingthesupplyheadersuptothehazardareaselectorvalves.Itisthenpossibleforpersonneltogotothespecificpilotvalvecabinetcontrollingtheoperationoftheseselectorvalvesandmanuallyopenthem,allowingC02toenterthehazardarea.EachoftheControlRoomcablevaultsisprovidedwithamanualCO2systemback-uptotheautomaticHalondisystem.3.2.2.3HalonSuressionSstemsTheD.C.CookNuclearPowerPlanthasbeenequippedwithHalon1301inanumberofareas:theControlRoomcablevaults(FireAreas57and58),computer.areas,TSCareas,securityareas,andguardhouseareas.EachsystemhasitsownsetofHalon1301cylinders.Penetrationsealshavebeenprovidedtoensurethattherequiredconcentrationoftheagentismaintained.Althoughthe'oncentrations'fHalonrequiredforextinguishmentaregenerallylowandwouldnotresult-inserioushealthhaiards,personnelareadvisedtoleaveanyareainwhich.Halonhasbeen,or.isabouttobe,discharged.TheHalonsuppressionsystemscanbeoperatedbothautomaticallyandmanually.BothzonesofdetectionprovidedinPage3-10 theseareasmustsenseafirebeforetheagentwilldischargeautomatically.Eachsystemcanbemanuallyactuatedfromtheappropriatecontrolcabinetorcylinderbank.3.2.2.4PartialZoneorAreaCoveraeCertainareasorzonesintheAuxiliaryBuildingareidentifiedinTable2-2ascontainingpartialsuppressioncoverage.Thecriteriadevelopedtodeterminetheacceptabilityofpartialcoveragefortheseselectedzonesandareasisasfollows:AutomaticfiresuppressionmaynothavebeenprovidedinthoseportionsofFireZones1,3,5,6N,6M,6S,44N,44S,'1and'2basedononeormoreofthefollowingcriteria:(a)Highorextremelyhighradiationareas;(b)Radioactiveprocessing1tanks;equipmentandstorage(c)Lowcombustibleloads;(d)Controlledandlockedpersonnelaccess;(e)Areasshieldedbywallsseparatingequipmentfromtheremainderofthefireareaorzone;(f)Fireratedwallconstruction;(g)Containingprocesspipingandheatexchangers;(h)Presenceofdetectionsystems;I(i)Suppressionoverconcentratedcombustibleloads.ThesubstantialALARAconsiderationsassociatedwiththeinstallationofsystemsintheseareas,combinedwiththeextremelylowprobabilityoffiresi'ntheseregions,formedthecriteriawhichjustifiedtheentirezoneforexclusionofautomaticsuppressionsystemsPage-3-11 fromtheserooms.Inaddition,asuppressionsystemisnotprovidedinFireZoneslAthrough1H,44Athrough44H,andcontainmentforthesamereasonasstatedina-h.(2)AutomaticfiresuppressionsystemshavebeenexcludedfromFireZones49and50basedonthefollowingcriteria:(a)Theexistingbarrierconstructionprovidesadequateisolationandcontainmentofapotentialfire;(b)Fullzonedetectionisalreadyprovidedwithadditionaldetectionandsuppressionprovidedfortheprincipalcombustiblessourceinthezone(charcoalfilters);(c)Redundantsafeshutdowncablesand/orequipmentexistoutsidethezone;therefore,thezoneboundaryisnotrequiredtofunctionasaIII'.G.2separationbarrier;and(d)ThenewlyinstalledpreactionsprinklersystemslocatedinFireZone52adjacenttothesezoneswillinhibitfirespreadoutofthezonetofirezonesofadjacentfireareas.(3)AutomaticfiresuppressionsystemshavebeenexcludedfromFireZones144and145basedonthefollowingcriteria:(a)Theexistingbarrier.constructionprovidesadequateisolationandcontainmentofpotentialfire;(b)Fullzonedetectionisalreadyprovided.Page3-12 1341A135LEGEND29G-FIREZONENUMBER9-IONIZATIONDETECTORImmmmmwqsISTAIRWAYUPPRESIONSYSTEM&WW&%mlal181E1C12gIIJ888221G1361D813711H138A138B138C11211314313914314314014129G68143PLANTARRANGEMENTPLANBELOWBASEMENTUNITS182DETECTIONANDSUPPRESSIONSYSTEMS~P47&a$4Qa~pertureCar8FIGURE3-1QV02,190215-Z I1 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EL609'-0")(14)9ANPIIIIIf(19)8EL609'-0-f(12)GAN(EXTENSION))"(10)9IIIIIOARECORDVAULT(1)8AND:::::::.EL621'N"TELE.EQUIP.ROOM(1)8AND~~~-~..OTHERFLOORAREAS(10)8ANPIIIII(EXTENSION)EL.623-6"(26)@AMPIIIIIIFORLOCKERROOM118SS8888888EL621"6"8See33SSA120:-7I122RCPIe10310heI33B1108:::3809RCPRCP.'810132693644A44B44C44D<1144E44F44G44HFI:)7eI--'1S4eee8SSEL621'.6"35:27::75RCP104RCP123II)22Q:39:S:RCP10234B'111146888834888834A121LEGEND'4N.FIREZONENUMBERISI-IONIZATIONDETECTORZ)-INFRAREDDETECTOR-INFRAREDDETECTOR,UNDERFLOOR8-IONIZATIONDETECTOR,UNDERFLOOR0;0-THERMISTORDETECTOR9-HEATDETECTOR-WETPIPESUPPRESSIONSYSTEM119::::::::::-CO2SUPPRESSIONSYSTEM-MANUALWATERSUPPRESSIONSYSTEMgeaammw\I11-STAIRWAYSUPPRESSIONSYSTEMleeaaaaeJ-PREACTIONSPRINKLERSUPPRESSIONSYSTEMNOTE1)THERMISTORDETECTIONANDDELUGEWATERSPRAYPROVIDEDFORYARDTRANSFORMERSANDPORTIONOFTURBINEBUILDINGEXTERIORWALL:40A:::gi::8:-~P.::8..-P::40B::':::8:~:;42A;:::@42C:M842D8.-P:8::5:--e@~~'..-'.'.'.428:::88888884388888888811044N-44S8(y11146D46::46A::::@8:::8:::'8'45.'.'.'.47B~9.:5:2)CABLETRAYTHERMISTORDE-TECTIONISPROVIDEDINFIREZONES67,75,101,102,103,and1043)MANUALWATERSPRAYSYSTEMISPROVIDEDFORTHECHARCOALFILTERUNITSINFIREZONES33AAND34A13191964)AUTOMATICWATERSPRAYSYSTEMISPROVIDEDFORTHECHARCOALFILTERUNITSINFIREZONES67AND759992142IAPKRVO)NCARDPLANTARRANGEMENTMEZZANINEFLOOREL609'NITS1Im2v~o~~eDETECTIONANDSUPPRESSIONSYSTEMS~P~~<~SV02190215/gIFIGURE3-3 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3844N39ll12PARTPLANEL609'.6SLEGEND58-FIREZONENUMBER9-IONIZATIONDETECTORX3-INFRAREDDETECTORil41PIPETUNNELPLANEL601'5-PREACTIONSPRINKLERSUPPRESSIONSYSTEM~gggg+-HALONSUPPRESSIONSYSTEM-CO2SUPPRESSIONSYSTEM::D,"-::::~e"."-'."e'-"-e::::.::i:::::::~5::-::::-e~::::9::5659:::::io;:.::.:.::D:.::::-=:::Le.'::~::e::::::e::60-.-.....Zt::::e110PLANEL620'-6"to625'-10"TlAPKRVOa8'ARBAhoXvaHab1eOnApertareCardPARTPLANTARRANGEMENTPLANEL601',609'I620'-6"to625'-10"UNITS182DETECTIONANDSUPPRESSIONSYSTEMS,8VQ8190815.iFIGURE3-4 1A E-EI-633'<"(~I)8ANDIIIIFORSERVICEBLDG.EXTENSION44)9AOllllFORMECH.EQUIPRMONLYEI-64'965QCVAULT(2)6A(EXTENSION))REMAININGFLOORAREA(51)9RCPRCP4910812.61061328C)RCPjgP":,RGP1208326948884F45L~I44Dm44A5144E10785044HL75RCP12122109RCPRCP133RCPLEGEND130-FIREZONENUMBER8-IONIZATIONDETECTOR-HEATDETECTORe-IONIZATIONDETECTOR,ABOVECEILING-INFRAREDDETECTOR-THERMISTORDETECTORSI-IONIZATIONDETECTORUNDERFLOOR.HALONSUPPRESSIONSYSTEMI-MANUALDELUGESUPPRESSIONSYSTEMIISTAIRWAYSUPPRESSIONSYSTEM-PREACTIONSPRINKLERSUPPRESSIONSYSTEM-WETPIPESUPPRESSIONSYSTEM!NOTE:1)CABLETRAYTHERMISTORDETEC-TIONISPROVIDEDINFIREZONES67AND75ye~8~888~8~0~8~~53~48ee85eeeeeeOeeeoooe++8888~'84~0~~~~eee8888~~54e88~~0~~8888888~8522)MANUALWATERSPRAYSYSTEMISPROVIDEDFORTHECHARCOALFILTERUNITSINFIREZONES49,50AND129131129TURBINECOMPUTERROOM.(4)8CONSOLEROOM/2)eCONSOLEROOM(2)8CONSULTATIONROOMi2)8REMAININGAREA/9)8145126144COMPUTERROOM-QQCONSOLEROOM.QgCONSULTATIONROOM-)(((TURBINE'"PA13015YLAPERTURECAR9DRYCHEMICALFORTURBINEBEARINGDRYCHEMICALFORTURBINEBEARINGRBQP~ggaM60~AP@>NreCardPLANTARRANGEMENTTURBINEBUILDINGMAINFLOOREL633'NITS182DETECTIONANDSUPPRESSIONSYSTEMSFIGURE3-56P~

rt 67S3388813267686732SSI8L,869SII834813375767575LEGEND130-.FIREZONENUMBER8;,IONIZATIONDETECTOR8-IONIZATIONDETECTOR,UNDERFLOORX3~INFRAREDDETECTORC>l;AIRDUCTIONIZATIONDETECTOR-PREACTIONSPRINKLERSUPPRESSIONSYSTEM-HALONSUPPRESSIONSYSTEMNOTE:1)MANUALWATERSPRAYSYSTEMISPROVIDEDFORTHECHARCOALFILTERUNITSINFIREZONES69,70AND731081092)CABLETRAYTHERMISTORDE-TECTIONISPROVIDEDINFIREZONES67,68,75and76gSg88@70g8Im8Q@ST88@73E]8SImSI5I1)P,T+cqgag~pAE9129(SEEFIGURE3-5)130(SEEFIGURE3-5)%isoAvailable~+'<partureC>r~DETECTIONANDSUPPRESSIONSYSTEMSPLANTARRANGEMENTREACTORBUILDINGMAINFLOOREL650'NITS152FIGURE3-6 Itl 4.SAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITSMETHODOFINVESTIGATION4.1IntroductionParagraph50.48of10CFR50,whichbecameeffectiveonFebruary17,1981,requiresallnuclear.plantslicensedtooperatepriortoJanuary1,1979,tocomplywiththerequirementsofSectionIIIofAppendixRto10CFR50regardlessofanypreviousapprovalsbytheNuclearRegulatoryCommissionofotherdesignfeatures.SectionIII.G.1requiresthatfireprotectionfeaturesbeprovidedforthosesystems,structuresandcomponentsimportanttosafeshutdown.Thesefeaturesmustbecapableoflimitingfiredamagesothat:(1)OnetrainofsystemsnecessarytoachieveandmaintainhotshutdownconditionsfromeithertheControlRoomortheEmergencyControlStation(s)isfreeoffiredamage;and,(2)SystemsnecessarytoachieveandmaintaincoldshutdownfromeithertheControlRoomortheEmergencyControlStation(s)canberepairedwithin72hours.SectionIII.LofAppendixRandGenericLetter81-12(February20,1981)Enclosure1"StaffPosition,"providesadditionalguidanceontheNRCStaff'srequirementsforthissafeshutdowncapability.4.1.1DesinBasisEventsForthepurposeofthisreviewandreportforwhichsafeshutdowncapabilitywillbedemonstratedforD.C.Cook,thespectrumofpostulatedexposurefiresinagivenplantareawillPage4-1 beanalyzedinvolvingeitherin-situortransientcombustibleswhichareexternaltoanysystems,structuresorcomponentslocatedinoradjacenttothatarea.mayadverselyaffectthosesystems,Theeffectsofsuchfiresstructuresorcomponentsessentialtosafeplantshutdown.Themostlimitingassumption(i.e.,worst-casescenario)withrespecttotheavailabilityofoff-sitepowerwillbeassumed.Noconcurrentorsequentialdesignbasisaccidentsortransientsareassumedtoexist.Inaddition,norandomsinglefailuresareassumedtooccurotherthanthosewhichoccurasadirectresultoffireanalysisassumptions.4.2SafetFunctionsThespecificsafeshutdownfunctionsnecessarytosatisfyAppendixRacceptancecriteriaareasfollows:(1)ReactivityControlFunction(2)ReactorCoolantMakeupControlFunction(3)ReactorCoolantPressureControlFunction(4)ReactorHeatRemovalFunction(5)ProcessMonitoringFunction(6)MiscellaneousSupportingFunctions4.2.1ReactivitControlAfterareactortrip,.thereactivitycontrolfunctionmustbecapableofachievingandmaintainingatleastalwreactivityshutdownmarginfromzeropowerhotstandbytocoldshutdown.ThefunctionmustbecapableofcompensatingforanyreactivityPage4-2 changesassociatedwithxenondecayandthereactorcoolanttemperaturedecreasewhichoccursduringcooldowntocoldshutdownconditions.4.2.2ReactorCoolantMake-uControlThereactorcoolantmake-upcontrolfunctionshallbecapableofassuringthatsufficientmake-upinventoryisprovidedtocompensateforReactorCoolantSystemfluidlossesduetoidentifiedleakagefromthereactorcoolantpressureboundaryandshrinkageoftheReactorCoolantSystemwatervolumeduringcooldownfromhotstandbytocoldshutdownconditions.Adequateperformanceofthis,functionisdemonstratedbythemaintenanceofreactorcoolantlevelwithinthepressurizer.4.2.3ReactorCoolantPressureControlReactorcoolantpressurecontrolisrequiredtoassurethattheReactorCoolantSystemisoperated:(1)WithinthetechnicalspecificationsforReactorCoolantSystempressure-temperaturerequirements;(2)TopreventpeakReactorCoolantSystempressurefromexceeding110.ofsystemdesignpressure;and(3)Withasufficientsubcoolingmargintominimizevoidformationwithinthereactorvessel.4.2.4ReactorHeatRemovalThereactorheatremovalfunctionshallbecapableoftransferringfissionproductdecayheatfromthereactorcoreataratesuchthatspecifiedacceptablefueldesignlimitsanddesignconditionsofthereactorcoolantpressureboundaryarePage4-3 notexceeded.Thefunctionshallbecapableofachievingcoldshutdownwithina72-hourperiodandmaintainingcoldshutdownconditionsthereafter.4.2.5ProcessMonitorinWheninformationonprocessvariablesisrequiredbyoperatorstomodifysafeshutdownsystemalignmentsorcontrolsafeshutdownequipment,suchmonitoringinformationmustbeavailable.Theprocessmonitoringfunctionshallbecapableofproviding,ifpossible,directreadingsofthoseplantprocessvariablesnecessaryforplantoperatorstoperformand/orcontrolthepreviouslyident'ifiedfunctions.4.2.6MiscellaneousSuort,inFunctionsThesystemandequipmentusedtoperformthepreviousfunctionsmayrequiremiscellaneoussupportingfunctionssuchasprocesscooling,lubricationandac/dcpower.Thesesupportingfunctionsshallbeavailableandcapableofprovidingthesupportnecessarytoassureacceptableperformanceofthepreviouslyidentifiedsafeshutdownfunctions.4.2.7DiscussionTheselectionofsafetyfunctionsisprincipallybasedonthoseidentifiedinBranchTechnicalPosition(BTP)CMEB9.5-lSectionC.5.c.Othersubfunctionsmayexistundereachofthesebroadheadings.Examplesof,suchsubfunctionsaresteamgeneratorlevelcontrolandsteamgeneratorpressurecontrolwhichexistasapartofreactorheatremoval.SteamgeneratorPage4-4 levelandpressurecontrolarerequiredduringhotstandby.Butduringcertainportionsofhotshutdownandallofcoldshutdown,theResidualHeatRemovalSystemisoperableandthesesubfunctionsarenotrequired.Othersubfunctionslikeemergencypower,processcooling,etc.,areembracedbythemiscellaneoussupportingfunctiondefinition.InadditiontothefunctionsidentifiedinBTPCMEB9.5-1,areactorcoolantpressurecontrolfunctionhasbeenincluded.Althoughthisfunctioncouldbeplacedwithinthereactorcoolantmake-upfunctionandreactorheatremovalfunction,thespecificgoalsachievedbytheperformanceofthisfunctionareuniqueenoughtowarrantaseparatesafetyfunctionclassification.Thesafetyfunctionsidentifiedadequatelyassurethatthecontainmentpressureboundarywillnotbethreatened.Uncontrolledmassandenergyreleasestothecontainmentfromtheprimarysystemsarelimitedbytheachievementofthesesafetyfunctionsandwillassurethatnoruptureofthereactorcoolantorcontainmentpressureboundarieswilloccur.4.3AnalsisofSafeShutdownSstems4.3.1IntroductionVariousanalyticalapproachescouldbetakentoassurethatsufficientplantsystemsareavailabletoperformthepreviouslyidentifiedplantsafetyfunctions.Numerousplantsystemsareavailable,aloneandincombinationwithothersystems,toprovidetheserequiredfunctions.Furthermore,theexactPage4-5 locationandspecificeffectsofexposurefirescannotbepreciselydetermined.Ingeneral,recognizingtheconfinedphysicallocationofsuchfiresandtheoperationalflexibilityandphysicaldiversityofsystemsavailabletoachievesafe,shutdown,onecanassumethatappropriateplantfireprotectionfeatureswilllimitfiredamagetotheextentthatunaffectedplantsystemswillbeabletoattainsafeshutdown.Anextensiveeffortwouldberequiredtoidentifytheeffectsofpostulatedfiresinallpotentialplantlocationsonalltheplantsystemswhicharenormallyavailabletosupportsafeshutdown.Asaconservativealternativetothisapproach,aminimumsetofplantresponsetotherequirementsofAppendixRwhichcanachieveandmaintainsafeshutdowninspiteofthelocationofthefireeventandthemostlimitingassumedconcurrentlossofoff-sitepower.Demonstrationofadequateprotectionofthisminimumsystemsetfromtheeffectsofpostulatedfiresconstitutesan'adequateandconservativedemonstrationoftheabilitytoachieveandmaintainsafeshutdownforthepurposeoffireprotection.ThesafeshutdownsystemsselectedforD.C.Cookwillbecapableofachievingandmaintainingsubcriticalconditionsinthereactor,maintainingreactorcoolantinventory,achievingandmaintaininghotconditionsforanextendedperiodoftime,achievingcoldshutdownconditionswithin72hours,andmaintainingcoldshutdownconditionsthereafter.Page4-6 4.3.2InitialAssumtions(1)Theunitisoperatingat100~powerupontheoccurrenceofafireandconcurrentlossofoff-sitepower.(2)Thereactoristrippedeithermanuallyorautomatically.(3)Noadditionalsinglefailuresareconsideredotherthanthelossofoff-sitepowerandthosedirectlyattributabletothefire.(4)Nopieceofequipmentrequiredforsafeshutdownisassumedtobeoutofservice.4.3.3DefinitionsHotStandby-Theinitialsafeshutdownstatewiththereactoratzeropower,Kefflessthan0.99andRCSaveragetemperaturegreaterthanorequalto350F.HotShutdown-ReactoratzeropowerKefflessthan0.99andRCStemperaturebetween350Fand200oF.ColdShutdown-Reactoratzeropower,Kefflessthan0.99andRCStemperaturebeloworequalto200oF.4.3.4SafeShutdownFunctions4.3.4.1ReactivitControlFunctionInitialreactivitycontrolwillresultfromanautomaticReactorProtectionSystem(RPS)triporfromoperatorinitiationofamanualtripuponnotificationofamajorfire.ThisactionwilldeenergizethenormallyenergizedRPStoactuateareactortrip.TheeffectsoffiresontheRPSarenotconsideredtoprecludetheinitiationofanautomatictriporcontrolrodinsertion.Page4-7 Followingrodinsertion,hotsubcriticalconditionsareachievedforapproximately35hourswithnoadditionofboron,assumingallrodsareinsertedintothecoreandthereactor6ripoccursatendoflifeandat100~power,withxenonatsteady-statelevel.Asxenondecays,however,positivereactivityisadded,requiringtheadditionofboratedwaterfromtherefuelingwaterstoragetank(RWST)tomaintaintherequiredmarginofshutdownreactivity.Thecooldowntransitionfromhotstandbytohotshutdown,andultimatelytocoldshutdown,requiresadditionalborationtocompensateforthenegativemoderatortemperaturecoefficient.Thetotalquantityofborated'waterfromtheRWST(aminimumof1950ppm)whichmustbeinjectedintotheReactorCoolantSystem(RCS)toachievetherequiredcoldshutdownmarginislessthanthequantityofboratedwaterfromthesamesourcerequiredtomaintainaconstantpressurizerlevelduringcooldown(ReactorCoolantSystemvolumeshrinkagecompensation).TheChemicalandVolumeControlSystem(CVCS)iscapableofinjectingthisquantityofboratedwaterintotheReactorCoolantSystemandmaintainingtherequiredshutdownreactivitymarginthroughoutsafeshutdown.Figure4.1depictstheRCSReactivityControlfunction.4.3.4.2ReactorCoolantMake-uControlFortheassumedfirescenario,reactorcoolantmake-upcontrolcanbeachievedbyisolationofthenormalandexcessletdownCVCSpathsandoperationofthechargingportionofthePage4-8 CVCSthroughtheRCPsealinjectionpath.Theboroninjectiontank(BIT)injectionpathmayalsobeusedforaddedoperationalflexibility.Reactorcoolantmake-upwillbeavailablewithinthefirst30minutespost-reactortrip.SuccessfulmaintenanceofRCSintegrityisalsonecessarytoachieveadequateinventoryandpressurecontrol.Inadvertentopeningofboundaryisolationvalvessuchasthereactorheadorpressurizerventvalves,pressurizerpower-operatedreliefvalves,andRHRsuctionisolationvalveshavebeenprecludedandadequatemaintenanceofreactorcoolantpumpsealintegrityachievedtoassuresafeshutdown.ControlofpressurizerwaterlevelachievedmanuallyisbycontrollingCVCSchargingflowbasedonpressurizerlevelinformation.Figure4.2depictstheRCSmakeupcontrolfunction.4.3.4.3ReactorCoolantPressureControlOverpressureprotectionoftheRCSpriortoacontrolledcooldownanddepressurizationisprovidedbythepressurizersafetyvalves.AfteralignmentoftheResidualHeatRemovalSystem(RHR),atapproximately350Fand400psig,overpressureprotectionisprovidedby,theRHRsafetyvalves.ThepressurizersafetyvalvesandRHRsafetyvalves,inconjunctionwithacontrolledcooldownandatimelytransfertoRHRcoolingatoraroundaReactorCoolantSystemtemperatureof350F,shouldensurethattheRCSpressure-temperaturelimitsarenotexceeded.Foradequatepressurecontrol,isolationofthepressurizerauxiliaryspraywilloccurastheresultofoperatoraction.Page4-9 TheestablishmentandmaintenanceofasufficientsubcoolingmarginwithintheReactorCoolantSystemisessentialtosuccessfulachievementandmaintenanceofsafeshutdown.Inordertoprovideoperationalflexibilityandtoenhancethesafeshutdowncapabilitiesoftheplant,repairprovisionswillbedevelopedtoprovidetheavailabilityofatleastonebackuppressurizerheatergroup.AsdiscussedinSection6,thepressurizerheatersarenotconsiderednecessaryforplantsafeshutdown.However,theavailabilityofonegroupofheatersenhancesthecapabilityofmaintainingsufficientsubcoolingmargin.Figure4.3depictstheRCSpressurecontrolfunction.J4.3.4.4ReactorHeatRemovalFunctionFollowingareactortripwithanassumedlossofoff-sitepower,decayheatisinitiallyremovedbynaturalcirculationwithintheReactorCoolantSystem,-heattransfertotheMainSteamSystemviathesteamgenerators,andoperationofthepower-operatedatmosphericreliefvalves(PORVs)ortheMainSteamSystemcodesafetyvalves.Withthesteamgeneratorsafetyvalvesalone,theRCS,maintainsitselfclosetothenominalno-loadcondition.Fordecayheatremovalvianaturalcirculationaminimumoftwosteamgeneratorswillbeavailable.Thisdecayheatremovalrequirestheabilitytosupplysufficientauxiliaryfeedwatertothesteamgeneratorstomakeupfortheinventorydischargedassteambythesafetyorreliefvalves.FormaintenanceofinitialPage4-10 hotstandbyconditions,thesecondarymake-upflowrequiredtothesteamgeneratorsislessthan450gpmandissuppliedbytheAuxiliaryFeedwaterSystem(AFW).Auxiliaryfeedwatersourcesareavailablefromthecondensatestoragetanks,andalternatively,fromtheEssentialServiceWaterSystem(ESW).Auxiliaryfeedwatermaybesuppliedtothesteamgeneratorsbytheauxiliarymotor-drivenfeedwaterpumpsorbytheauxiliarysteamturbine-drivenfeedwaterpump.Thefurtherremovalofadditionalheatisachievedbythecontrolledoperationofthesteamgeneratorpower-operatedatmosphericreliefvalve(PORV)andcontinuedoperationoftheAuxiliaryFeedwaterSystem.Duringthiscooldownphase,anauxiliaryfeedwaterflowofupto450gpmisrequiredandcanbesuppliedwithanindividualmotor-orturbine-drivenauxiliaryfeedwaterpump.AfterreductionofReactorCoolantSystemtemperaturebelow350F,theResidualHeatRemovalSystemisusedtoestablishlong-termcorecoolingthroughtheremovalofdecayheatfromtheReactorCoolantSystemtotheenvironmentviatheResidualHeatRemovalSystem,ComponentCoolingWaterSystem,andtheEssentialServiceWaterSystem.Figure4.4depictsthereactorheatremovalfunction.4.3.4.5ProcessMonitorinFunctionTheoperatorrequiresknowledgeofvariousplantparameterstoperformrequiredsystemtransitionsandessentialoperatoractions.Adiscussion,bysafeshutdownfunction,ofthenecessaryinstrumentationisprovidedbelow.Page4-11 Forthefirescenariosassumedinthisanalysis,inventorymake-uptotheReactorCoolantSystemwillbefromtherefuelingwaterstoragetankthroughthereactorcoolantpumps'ealinjectionlines.AnalternativepathviatheBITinjectionpath,hasbeenanalyzedforoperationalflexibility;however,itisnotrequiredforsafeshutdown.Aspreviouslydiscussed,sufficientnegativereactivityexistsintheReactorCoolantSystem(afterrodinsertion)for35hourswithouttheneedforadditionalboronaddition.Furthermore,thenegativereactivityinsertedbythecontrolrodsandtheRWSTwaterinjectedbytheCVCS(tocompensatefortheRCSvolumedecrease)willmaintainthecoresubcriticalwhilecoolingdownfromhotfullpowertoacoldshutdowncondition,assumingnoletdownisavailable.AdministrativeandoperationalproceduresforD.C.Cookwillensurethatsufficientboronisaddedinatimelymannertotheprimarysystemtoachievethenecessarycoldshutdownreactivitymargin.Withboronadditionunderprocedural'control,nooperatoractionsareexpectedoranticipatedbasedondirect-readingneutronmonitoringtoensureanadequatesafeshutdownnegativereactivitymargin.However,coresourcerangedetectorswillbeavailableforcoreactivitymonitoringintheControlRoom.Anadditionalsourcerangechannelwillalsobeaddedtoalocalstation,LSI-4,toprovidethisinformationforareasrequiringalternativeshutdown.Page4-l2 Variousprocessmonitoringfunctionsmustbeavailabletoadequatelyachieveandmaintainthereactorcoolantmakeup,pressurecontrolanddecayheatremovalfunctions.Fortheassumedfirescenario,maintenanceofhotstandbyrequiresthat,pressurizerlevelandRCSpressureinstrumentationbeavailable.ReactorCoolantSystemtemperatureismaintainedduringhotstandbybyproperdecayheatremovalviasteamgeneratorsandself-actuationofthemainsteamcodesafetyvalvesorcontrolledoperationofthesteamgeneratorPORVs.Inthenaturalcirculationmodeofoperation,thedifferencebetweenthehot-legandcold-legwider'angetemperatures(Th-Tc)providesadirectindicationoftheexistenceofanaturalcirculationcondition.Operatingpersonnel,bymonitoringofRCSpressureandhotlegtemperature(Th)instrumentationand,ifavailable,manualcontrolofthepressurizerheaters(notrequiredforsafeshutdown),willmaintainRCSpressuretoassurethatappropriatesubcoolingmarginisachieved.MaintenanceofpressurizerlevelcontrolisachievedbymonitoringpressurizerlevelinstrumentationandmanualcontrolofCVCSchargingflow.Maintenanceofhotstandbyalsorequiresthecontrolofthesecondarysystemtocompensateforvariationsintheprimarysystemperformance.Monitoringofsteamgeneratorlevelandpressureareavai.labletoassureadequateandcontrolleddecayheatremoval.ThelevelcontrolisachievedbyoperatormanipulationofAFWsystemflow,basedonsteamgeneratorlevelPage4-13 indication.Secondarysystempressurewillbemonitoredbysteamgeneratorpressureindication.Theplantoperatorswillutilizetheinstrumentationdiscussedaboveformonitoringofnaturalcirculationconditions,subcoolingmargin,heatremovalandcompliancewiththeplant'spressure/temperaturelimitsasitpertainstothelowtemperatureoverpressureprotectionoftheReactorCoolantSystem(coldlegtemperatureinconjunctionwithRCSpressure).4.3.4.6SuortinFunctionsVarioussystemsarerequiredtoprovidesupporttosafeshutdownequipmentorsystems.Thesesupportsystemsare:(1)EmergencyPowerSystem(2)EssentialServiceWaterSystem(3)ComponentCoolingWaterSystemFigure4.5depictsthesupportingsysteminteractionswithsafeshutdownsystems.Thefollowingsectionsdiscusseachoftherequiredsafeshutdownsystemsandthesupportsystems.IIt4.4SafeShutdownSstems4.4.1ChemicalandVolumeControlSstem(CVCS)ThechargingportionoftheChemicalVolumeandControlSystem(CVCS)accomplishesthefollowingsafetyfunctions:(1)Reactivitycontrolbycontrolofsolublechemicalneutronabsorber(boron)concentrationintheRCS,reactorcoolantmakeupcontrolbymaintainingwaterinventoryintheRCS(2)MaintenanceofreactorcoolantpumpsealintegrityPage4-14 Reactivitycontrolcapabilityforplantshutdownisprovidedbythecontrolrods,withboricacidinjectionusedtocompensateforthexenontransients.Insertionofthecontrolandshutdownrodgroupsmakethereactoratleast1%subcritical(keff<0.99)followingtripfromanycredibleoperationconditiontothehotzeropowercondition,assumingthemostreactiverodremainsinthefullywithdrawnposition.Fortheassumedfirescenario,nostruck-rodconditionneedbeassumed.Wheneitherunitisatpower,thequantityofboricacidretainedinitsrefuelingwaterstoragetank,readyforinjectiontotheRCS,alwaysexceedsthatquantityrequiredtobringthereactorfromafullpowerconditiontohotshutdownandthentocoldshutdown.Fortheassumedpost-firescenario,make-upwatertotheReactorCoolantSystemwillbeprovidedbytheChemicalandVolumeControlSystemfromtherefuelingwaterstoragetank(boratedataminimumof1950ppm).NumerousCVCSflowpathsarenormallyavailableforchargingtotheRCS.Twoseparateandindependentflowpathswillprovidereactorcoolantmakeupandboration:(1)Thecharginglinetothereactorcoolantpumps'ealswillalwaysbeavailableifatleastoneofthechargingpumpsisoperational.(2)Injectionviatheboroninjectiontankisanalternativeflowpathwhichisnotrequiredforsafeshutdown;however,itprovidesplantoperationalflexibility.Page4-15 Fortheassumedevent,chargingandborationwillbeaccomplishedbyoperatingaminimumofonecentrifugalchargingpumptakingsuction-fromtherefuelingwaterstoragetankandinjectingboratedwaterthroughtheRCPsealinjection,linetotheRCSorasanoptionboratedwatermaybeinjectedviatheboroninjectiontank.SuctiontothechargingpumpcanbedeliveredfromtheRWSTbyopeningeitheroneoftwonormallyclosedmotor-operatedvalves.Controlledleakage(letdown)fromtheReactorCoolantSystemnormallyoccursviathesealleak-offreturnpathandthenormalandexcessletdownpaths.Forthepost-fireoperationalsequence,thenormalandexcessletdownpathswillbeisolated.Isolationofthenormalandexcessletdown,lineswilloccurasaresultoflossofinstrumentairorwillbeachievedbyoperatoractiontoassureadequateinventorycontrol.Furthermore,proceduralcontrolforisolationofallpotentiallyspuriousRCSboundarypaths,includingpressurizerPORVs,reactorandpressurizerpost-accidentventsandauxiliaryspray,willbeachieved.Sealleak-offflow'eednotbeavailabletoachievesafeshutdown.ThereactorcoolantpumpNo.1sealleak-offair-operatedvalvesfailopen.Inthatcondition,sealreturnflowwillbeavailableatthesuctionofthechargingpumps(throughtPage4-16 thesealwaterheatexchanger)oritmaybelocallyorremotelyisolatedbyacontainmentisolationmotor-operatedvalveorbythesealwaterreturnfiltersmanualvalves.Theinjectionpathfromthechargingpumpstothereactorcoolantpumpsealscontainsonlyoneair-operatedvalve(normallyopen,fail-open)whichisprovidedwithaminimumflow(50gpm)mechanicalstop.Thus,operationofonechargingpumpwillensureaminimumRCSchargingflowofapproximately20gpm,irrespectiveoftheavailabilityoftheBITinjectionpath.TheinjectionpaththroughtheBIT(containing900gallonsof20,000ppmboratedwater)isavailableforoperationalflexibility.Itrequiresremoteormanualopeningoftwomotor-operatedvalvesinseries(totaloffourmotor-operatedvalvesarrangedintworedundantsetsinseries),sincetheRCScoldlegisolationvalvesarenormallyopen.InclusionoftheBITinjectionpathasanalternatechargingandborationpath,althoughnotessentialforsafeshutdown,willprovideaddedoperationalflexibilityinthepost-firescenariodefinedforthisanalysis.Isolationofthevolumecontroltank(byclosureofeitheroneoftwomotor-operatedvalves)duringemergencymakeupfromtheRWSTandisolationofthesealreturnlinetothesealwaterheatexchangercanbeperformedbylocalmanualoperation.Pressurizerwaterlevelismaintainedbyoperationofonecentrifugalchargingpumpusingpressurizerlevelinstrumentationinformation.Page4-l7 CentrifualCharinPumsThetwohigh-headcentrifugalchargingpumpsperunitarenormallyalignedfortheCVCSchargingfunction.DuringdesignbasisaccidentstheyarepartoftheECCSsystem.Thetcentrifugalchargingpumpsareof'hehorizontaltypewithadesignflowrateof150gpmandadischargepressureatshutoffof2749psig.EachpumpisdesignedtoprovideratedflowagainstapressureequaltothesumoftheRCSnormalmaximumpressure(existingwhenthepressurizerpower-operatedreliefvalveisoperating)andthepiping,valveandequipmentpressurelossesatthedesignchargingchargingpumpshasaminimumflows.Eachofthecentrifugalrecirculationflowmotor-operatedvalvetopreventdamagetothepumpwhenitisoperatingatshut-offpressure.Thepumpsrequirecoolingwater(fromtheCCW)totheirmechanical-sealheatexchangers,gearoilcoolers,bearingoilcoolersandsealhousings.Thepumpsalsorequireoperationofexternaloilpressurepumpsinidleconditions.BoronIn'ectionTankTheboroninjectiontank(BIT)isdesignedtoholdsufficientconcentratedboricacidsolutiontoshutdownthereactorduringaworst-caseaccident(steamlinerupture).Designconcentrationofboricacidis12%byweight(equivalentto20,000ppm)withausable,volumeof900gallons.RedundanttankheatersandlineheattracingareprovidedtoassurethatthesolutionismaintainedduringnormaloperationataPage4-18 temperature(>145F)whichisinexcessofthesolubilitylimit(approximately133F).RecirculationofthecontentsoftheBITduringnormalplantoperationisaccomplishedbyusingtheboricacidtransferpumps.ShouldtheBITpathbeutilized,isolationoftheBITrecirculationlines'.air-operatedvalves(fail-closed)willoccureitherasaconsequenceofthelossofoff-sitepowerorbyoperatorproceduralcontrolforthepost-firescenario.RefuelinWaterStoraeTankInadditiontoitsnormaldutytosupplyboratedwatertotherefuelingcavityforrefuelingoperations,theRWSTprovidesboratedwatertoECCSpumps.Thecapacityoftherefuelingwaterstoragetankisbasedontherequirementforfillingtherefuelingcavity.Thisquantityisinexcessofthatrequiredforsafeshutdown.TechnicalspecificationvolumeoftheRWSTis350,000gallonsofboratedwaterataminimumof1950ppmboron.Themaximumboricacidconcentrationisapproximately1.4weightpercentboricacid.4.4.2ReactorCoolantSstemTheReactorCoolantSystem(RCS)consistsoffoursimilarheattransferloopsconnectedinparalleltothereactorvessel.Eachloopcontainsareactorcoolantpumpandasteamgenerator.Page4-19 Inaddition,thesystemincludesapressurizerwithassociatedcodesafetyandreliefvalves(PORVs).ReactorCoolantSysteminstrumentationincludescold-leg,hot-legtemperatures(wide'ange),pressure(widerange)andpressurizerwaterlevel.Thenaturalcirculationcapabilityoftheplantprovidesameansofdecayheatremovalwhenthereactorcoolantpumpsareunavailable.Naturalcirculationflowratesaregovernedbytheamountofdecayheat,componentelevations,primarytosecondaryheattransfer,loopflowresistanceandvoiding.Theconditionsduringnaturalcirculationrelatetomaintainingadequateprimarytosecondaryheattransfer,subcoolingandinventory.Forthisanalysisofsafeshutdowncapability,twoofthefourRCSloopswillbemonitoredtoensurethatnaturalcirculationisestablishedandmaintained.Whileinnaturalcirculation,adequateheattransferandcoolantflowaredependentonadequateinventoryinboththeprimaryandsecondarysystems.Maintainingwaterlevelabovethe"U"tubesonthesecondarysideofthesteamgeneratorsandadequatelevelwithinthepressurizerarerequiredfornaturalcirculation.Confirmationofflowwhileinnaturalcirculationisaccomplishedthroughtheuseoftemperatureindications.Thoseindicationsarecold-legtemperature(Tc)andhot-legtemperature(Th).Tcshouldattainavaluewhichisafewdegreeshigherthanthesaturationtemperatureofthesecondaryinventory.ThshouldattainavaluewhichislessthanatfullPage4-20 powerandhigherthanTc.WhenTcandThattainthevaluesdescribedabove,flowandheattransferhavebeenachievedintheassociatedRCSloops.ReactorCoolantSysteminventorycontrolisbasedontheoperationofCVCSchargingpaths.HighpressuresealwaterfromtheCVCSsystemisinjectedintothereactorcoolantpumpslowerradialbearingchambertopreventleakageofhightemperaturereactorcoolantalongthepumpshaft.Theinjectionflowsplitsinthebearingchamberwithaportionflowingupthroughtheradialbearingandintotheshaftsealchamber.Theremainingportionflowsdowntheshaft,throughtheRCPthermalbarrierendintotheReactorCoolantSystem.Foraddedoperationflexibilityinapost-firescenario,thereactorcoolantpumpthermalbarriercoolingpathfromtheComponentCoolingWaterSystemcanbemadeavailableforsafeshutdown.Maintenanceofeithersealinjectionorthermalbarriercoolingprovidesadequateprotectionofthereactorcoolantpumpseals.However,componentsassociatedwiththeCCWthermalbarriercoolingflowpatharenotrequiredforsafeshutdown.PressurizerHeatersSubcoolingwithintheRCScanbemaintainedbycontrolledoperationofthepressurizerheatersandmonitoringofRCSpressureandloophot-legtemperature(Th).However,thepressurizerheatersarenotrequiredforsafeshutdown.AsanoptionaloperatoractiontoenhancethecapabilityofmaintainingPage4-21 sufficientsubcoolingmargin,aminimumheaterpowerof150kWwillbeavailablefromanyoftheback-upheatergroups.Thisadditionalheatwillconservativelycoverheatlossesfromthepressurizeratorbelownormaloperatingtemperature/pressurewithnoallowanceforcontinuousspray.Underlossofoff-sitepowerconditions,abackupheatergroupcanberepoweredfromtheoppositeunit.PressurizerSafetValvesOverpressurizationprotectionoftheRCSisassuredbythreespring-loaded,self-activatedpressurizercodesafetyvalvessetatapressureof2485psig.Thecombinedcapacityofthevalvesisequaltoorgreaterthanthemaximumpressuresurgeresultingfromacompletelossofloadwithoutreactortrip.4.4.3MainSteamSstemsForthepost-,firescenario,maintenanceofthesteamgeneratorinventoryandcontrolofsteamgeneratorpressurearerequiredforbothhotstandbyandsubsequentprimarysystem.cooldowntosupportthedecayandsensibleheatremovalfunctionwithintheapplicableoperationallimits.TheMainSteam(MS)Systemconsistsoffourparallelflowpaths,onefromeachsteamgeneratortothemainturbineofthekunit.TheMSsystemwillbeisolatedeitherbyoperationoftheturbinestopvalveorbythesteamgeneratormainsteamstopvalves.Page4-22 InaccordancewithsupportingFSARanalysis,inventorycontroloftwosteamgeneratorsissufficienttop'rovidethereactorheatremovalfunctionduringnaturalcirculationconditions.Maintenanceofthesteamgeneratorwaterlevelduringtheperiodofauxiliaryfeedwateroperation(hotstandby)involvesremoteorlocalmanualpositioningoftheauxiliaryfeedwaterflowcontrolvalvesandoperationofthemotor-drivenorturbine-drivenauxiliaryfeedwaterpumpsbasedonsteamgeneratorlevelinformation.SteamgeneratorwaterlevelandpressureindicationareavailableintheControlRoom,onthehotshutdownpanelsandattheLocalShutdownIndication(LSI)stations(locatedattheauxiliaryfeedwaterflowcontrolvalvestations).TheMSsystemisalsodesignedtodelivermotivesteamtotheturbine-drivenauxiliaryfeedwaterpumps.Steamtotheseturbinesissuppliedbybranchconnectionsupstreamofthesteamgeneratorstopvalvesontwosteamlinesineachunit(correspondingtosteamgeneratorsNo.2and3).Eitherlineissufficienttosupplysteamfortheauxiliary'feedwaterpumpturbine,buttwoareprovidedforredundancy.Theselinesaretiedtogetherwithanormallyopenmotor-operatedshut-offvalveandacheckvalveineachlinebeforethecross-tie.Inthemainsteamenclosuresoutsideofthecontainment,abankoffivecodesafetyvalvesareinstalledoneachsteamline.Page4-23 Thefivesafetyvalves(twosetat1065psig,twoat1075psig,oneat1085psig)oneachlineareinstalledtoprotecttheMSsystemagainstoverpressureandtoprovideacombinedrelievingcapacitygreaterthanthemaximumsteamflowrate.Power-0cratedReliefValvesApower-operatedreliefvalve(PORV)isprovidedoneachsteamlinewhichiscapableofreleasingthesensibleanddecayheattotheatmosphere.ThePORVsareusedforplantcooldownbysteamdischargetotheatmospheresincethesteamdumpsystemisassumednotavailable.ThePORVshaveatotalcombinedcapacityofapproximately10<ofthemaximumsteamflow.Fortheassumedfirescenario,aminimumoftwoPORVs,willbeusedtoprovidetheReactorCoolantSystemcontrolledcooldown.ControlsforthesteamgeneratorPORVsareprovidedintheControlRoom,inthehotshutdownpanels,andlocallyattheshutdownstations.Duringhotstandbyconditions,thesteamgeneratorPORVswillbeusedinmanualsteampressurecontrolmode.Thus,theRCStemperatureiscontrolledbymaintainingthesteamgeneratoratthecorrespondingsaturationpressure.4.4.4AuxiliarFeedwaterSstemTheAuxiliaryFeedwater(AFW)SystemisrequiredduringhotstandbytosupportRCSdecayheatremoval.Forhotstandby,secondarysystem(steamgenerator)inventorycontrolisprovidedbytheAFWsystem.Eachunitcontainstwomotor-drivenpumpsandoneturbine-drivenpumpwhicharededicatedtoeachunit.InPage4-24 addition,anymotor-drivenpumpcanbecrosstiedtotheoppositeunitbytheopeningofonemanualcross-connectvalve.Thus,eachunithasthecapabilityofreceivingauxiliaryfeedwaterfromfiveseparatepumpsources(fourmotor-drivenandoneturbine-driven).Eachmotor-drivenpumpisratedat450gpmandeachturbine-drivenpumpisratedat900gpm,withbothflowcapacitiesbeingat1175psigdischargepressure.Thepumpshavethedesigncapabilityofprovidingtheratedflowagainstasteamgeneratorpressureof1065psig(theloweststeamgeneratorsafetyvalvesetpoint).TheAFWsystemisdesignedtodeliverenoughwatertomaintainsufficientheattransferinthesteamgeneratorsinordertopreventlossof-primarywaterthroughtheRCSpressurizersafetyorreliefvalves.Turbine-DrivenAuxiliarFeedwaterPumsTheturbine-drivenauxiliaryfeedpump(TDFP)isdesignedtodeliverasufficientflowtoallfoursteamgeneratorsoftheunitwithwhichitisassociatedandmaintainsteamgeneratorwaterlevelsabovethelowerlimitofthewiderangelevelindicator.Eachisahorizontal,six-stage,centrifugalpumpdrivenbyasingle-stageatmosphericexhaustturbine.Onautomaticoperationmode,theturbinewillfunctionasasinglespeedmachine.However,manualspeedcontrolisavailableintheControlRoom,onthehotshutdownpanelsandlocally.LossofcontrolairtotheturbinegovernorwillresultinthegovernorPage4-25 revertingtothemaximumspeedsetpoint;however,speedcansubsequentlybecontrolledlocally.Twooverspeedtripdevicesareprovided.Theelectricaloverspeedtrip,setat115%speed,resetsautomaticallyafteratrip.Themechanicaloverspeedtrip,device,setat125~speed,mustberesetmanually.Eachauxiliaryfeedwaterpumpturbinehasitsownself-containedlubeoilsystemutilizingsleevebearingslubricatedbyashaft-rotary-typepumpdrivenfromtheturbineshaft.Waterforthecoolerissuppliedfromtheauxiliaryfeedpumpdischarge"line,thusensuringacoolingwatersupplywhenevertheauxiliaryfeedpumpturbineis'operating.SteamgeneratorsNo.2and/or3providemotivesteamtotheturbine-drivenauxiliaryfeedwaterpump.TheTDFPiscapableofoperatingdowntoasteampressureof125psia,atwhichtimetheResidualHeatRemovalSystemmaybeplacedinservice.Motor-DrivenAuxiliarFeedwaterPumsEachunitissuppliedwithtwomotor-drivenauxiliaryfeedwaterpumps(MDFP)withonlyonerequiredforsafeshutdown.Theotherunit'sMDFPsarealsoavailablebyopeningcross-tiedischargevalves.Eachpumpisahorizontal,eight-stagecentrifugalpump.Thepumpsrequirenoexternallubeoilcoolingorothersupportservicesotherthanacpower.Page4-26 CondensateStoraeTanksAthotstandby,theminimumvolumeofwaterrequiredbytheplanttechnicalspecificationfortheCondensateStorageTank(CST)is175,000gallons.ShouldtheCSTsupplybecomeexhausted,thealternateunit'sCSTismadeavailablethroughasinglecross-tie,normallyclosed,air-operatedvalve(fail-closed).Asabackuptoboththesesourcesofmakeupwater,cross-tiestotheEssentialService-WaterSystem(ESW)areprovided.Ampletimeisassumedavailablepost-fireforalocalmanualrealignmentofthenormallyclosedvalvesthatisolateESWfrom-.thesuctionof'heauxi.liaryfeedwaterpumps.4.4.5ResidualHeatRemovalSstem'heResidualHeatRemoval(RHR)SystemisdesignedtoremoveresidualandsensibleheatfromthecorebyreducingthetemperatureoftheRCSduringthehotandcoldshutdownphasesofsafeshutdown.TheRHRsystemconsistsoftwoRHRheatexchangers,twoRHRpumpsandtheassociatedpiping,valvingandinstrumentationnecessaryforoperationalcontrol.ThedesignresidualheatloadisbasedontheresidualheatfractionofthefullcoreMW(thermal)powerlevelthatexists20hoursfollowingreactorshutdownfromanextendedpowerrunnearfullpower.Duringcoldshutdownoperations,reactorcoolantflowsfromtheRCStotheRHRpumpsthroughthetubesideoftheRHRheatexchangersandbacktotheRCS.,TheheatloadistransferredbyPage4-27 theRHRheatexchangerstotheComponentCoolingWaterSystemwhichiscirculatingontheshellsideoftheheatexchangers.TheinletlinetotheRHRsystemislocatedinthehotlegofthereactorcoolantloopNo.2whilethereturnlineisconnectedtothecoldlegsofreactorcoolantloopsNos.2and3.Twomotor-operatedvalvesinseries"isolatetheinletlinetotheResidualHeatRemovalSystemfromtheReactorCoolantSystem.'Thereturnlinesareisolatedbycheck-valvesinseriesineachlineandacommonmotor-operatedvalve.ToavoidpotentialRCSboundaryleakageatthishigh/lowpressureinterface,oneofthemotor-operatedvalvesintheRHRsuctionlinewillbekeptclosed(pre-firecondition)withthecorrespondingmotorcontrolcenterbreakerin.theopenposition.Aminimumflowreturnlinefromthedownstreamsideofeachresidualheatexchangertothecorrespondingpump'suctionlineisprovidedtoassurethattheRHRpumpsdonotoverheatunderlowflowconditions.Amotor-operatedvalvelocatedineachminimumflowlinewillbeopenedifRHRpumpflowfallsbelow500gpmandwillbeclosedwhentheflowincreasesabove1000gpm.ThecooldownrateofthereactorcoolantiscontrolledbyregulatingtheflowthroughthetubesideoftheRHRheatexchangers.Abypassline,whichservesbothresidualheatexchangers,isusedtoregulatethetemperatureofthereturnflowtotheRCSaswellastomaintainaconstantflowthroughtheRHRsystem.Page4-28 TheRHRsystemcanbeplacedinoperationwhenthepressureandtemperatureoftheRCSarelessthan400psigand350F,respectively.Ifoneofthepumpsand/oroneoftheheatexchangersisnotoperative,safeoperationoftheplantisnotaffected;however,thetimeforcooldownisextended.ResidualHeatRemovalPumsTwoidenticalpumpsareinstalledintheResidualHeatRemovalSystem.Eachpumpissizedtodeliversufficientreactorcoolantflowthroughtheresidualheatexchangerstomeettheplantcooldownrequirements.AsealheatexchangerforeachpumpissupportedbyoperationoftheComponentCoolingWaterSystem.RHRSafetValvesTheRHRsystemsafetyvalvesprovideRCScoldoverpressureprotectionwhenevertheRHRsystemisinoperation.Thevalvesarelocatedinsidecontainment,oneeachontheRHRsystemsuctionanddischargepath,anddischargetothepressurizerrelieftank.Thevalvesaresetat450psigand600psig,respectively.AccumulatorsThemanualisolationoftheaccumulatorsisassumedasapost-fireactivity.TheisolationvalveateachaccumulatorisclosedonlywhentheRCSisintentionallydepressurizedbelowl000psig.Ifthesevalves'ssociatedcablesweredamagedbyfires,theisolationisassumedtobeperformedlocally,governedbyadequateplantprocedures(post-fire).Page4-29 4.4.6-ComonentCoolinWaterSstemTheComponentCoolingWater(CCW)Systemisasupportingsystemtoothersafeshutdownsystems.Tworedundanttrainsareavailable,eachconsistingofonepumpandheatexchangerandassociatedvalves,pipingandlocalinstrumentation.TheCCWsystemforeachunitservesasanintermediateheattransferloopbetweenthevarioussafeshutdowncomponentsandtheEssentialServiceWaterSystem(ultimateheatsink).1TheCCWsystemprovidescooling,forthefollowingsafeshutdownequipmentineachunit:(1)Residualheatremovalexchangers(2)Centrifugalchargingpumps(a)Mechanical-sealheatexchangers(b)Gearoilcoolers(c)Bearingoilcoolers(d)Sealhousing(3)Residualheatremovalpumpsmechanical-sealheatexchangers(4)Reactorcoolantpumpthermal'arrierheatexchangerEachunitisservedbytwocomponentcoolingpumps,twocomponentcoolingheatexchangers,asurgetankandassociatedpipingandvalves.AspareswingpumpisavailableasareplacementforanypumponeitherunitsCCWsystembyvalvingitintotheappropriateCCWheadersandbyconnectingitintotheotherpump'spowersupplyandcontrolcircuitry.OnepumpandonecomponentcoolingheatexchangerperunitfulfilltheheatremovalfunctionduringnormalfullloadPage4-30 operationforvariouscomponentslocatedintheAuxiliaryandContainmentBuildings.DuringplantcooldowninRHRmode,twopumpsandtwoheatexchangersper'nitarenormallyutilizedtoremovetheresidualheat.Ifoneoftheloopsisnotoperative,onlyoneRHRloopiseffectiveandcooldownthenisataslowerrate.Thetwocomponentcoolingloopsassociatedwithoneunitareinterconnecteddownstreamfromtheheatexchangerstoeffectivelyformanopenloopsupplyheaderbothforloadswhichareessentialandthosethatarenonessential.Forthepresentanalysisofsafeshutdown,noisolationofnonessentialloadsisassumedtoberequired.However,inanticipationofapotentiallylargecoolingdemand,theoperatorcanisolatethecomponentcoolinginlettononessentialloadsorshifttotheotherunitscomponentcoolingsystembyremotelyand/ormanuallyoperatedvalves.Theessentialloads,otherthantheresidualheatexchangers,arenormallyvalvedopentothesupplyheaderandtheydischargetothesuctionofthecomponentcoolingpumpwithwhichtheyarenormallyassociated,sothatcomponentcoolingwateriscirculatedcontinuouslythroughtheessentialloadsduringnormaloperation.Eachofthecomponentcoolingoutletlinesfromtheresidualheatexchangershasanormallyclosedmotor-operatedvalvewhichmustbeopenedduringRHRcooldown.Themotor-operatedvalvesPage4-31 thatisolatetheCCWsystemfromthereactorcoolantpumpthermalbarriercoolersareincludedassafeshutdowncomponentsforoperationalflexibilityinapost-firescenario,sincethethermalbarriersperformaredundantfunctiontothesealwaterinjectioncooling.Byappropriaterealignmentofpumpsuctionanddischargeheadercross-tievalves,oneoftheoppositeunitsCCWpumpsmaybededicatedtoprovidingflowtothefire-affectedunit.Asurgetankisconnectedtothesuctionsideofthepumps,andmakeuptothesystemissuppliedtothesurgetankfromthedemineralizedwatersystem.4.4.7EssentialServiceWaterSstemTheEssentialServiceWater(ESW)Systemprovidescoolingforthefollowingsafeshutdownheattransferequipment:(l)Componentcoolingheatexchangers(2)EmergencydieselgeneratorheatexchangersThesystemalsoprovidesaback-upsupplyofwatertotheAFWsysteminthe'eventthatthecondensatestoragetanksaredepleted.Thissystem,sharedbybothunits,consistsoffourpumps,eachwithitsassociatedduplexdischargestrainer,andtwomainheaders.Eachredundantheaderisservedbytwopumps(oneforeachunit)andeachheader,inturn,servesthecorrespondingessentialloadsinbothunits.Thesecomponents,togetherwiththeassociatedheatexchangers,valving,pipinglocalinstrumentation,completetheEssentialServiceWaterSystem.Page4-32 Duringnormaloperation,waterissuppliedthroughthecirculatingwaterintakepipesfromthelaketothepumpssuctionwelllocatedinthescreenhouse.TheEssentialServiceWaterSystemcanremovetheheattransferredtotheComponentCoolingWaterSystemfromboth.units,plustheheatloadsoftheemergencydieselgeneratorenginecoolers(i.e.,theairaftercoolers,lubricatingoilcooler,andjacketwatercooler),"theControlRoomairconditionercondensers,andprovidemake-upflowtotheturbine-andmotor-drivenauxiliaryfeedwaterpumps.EssentialServiceWaterPumsFourpumpsareinstalledinthecenterportionofthescreenhouse.Thepumpsareverticalturbinepumpswithenclosedshafts.Grease-lubricatedlinebearingseliminatetheneedforexternalwaterlubrication.Twopumpsserveeachoneofthetwomainsupplyheaders.Nomorethanthreeofthesepumpsarerequiredinanygivencircumstancestoprovidenecessaryflexibilityofoperationforbothunits.Twooperablepumpsaresufficienttocarrytheheatremovaldutiesoftwounitsathotorcoldshutdownsimultaneously(atminimumcooldownrate).Localmanualoperationofmotor-operatedvalvesiscreditedpost-fire.4.4.8EmerencPowerSstemTheplantEmergencyPowerSystem(EPS)includesanon-site,independent,automaticallyormanuallystartingemergencypowersourcethatsuppliespowertoessentialsafeshutdownequipmentifthenormaloff-sitepowersourcesareunavailable.Page4-33 Theemergencypowersourceforeachunitconsistsoftwo4l60V,3500kWdieselgenerators.Eachdieselengineisequippedwithit4ownauxiliaries.Theseincludestartingair,fueloil,lubeoil,coolingwater,regulatorandcontrols.intakeandexhaustsystem,speed(RPM)CoolingwaterisprovidedfromtheEssentialServiceWaterSystemswhileelectricpowerforeachengine'sauxiliariesisprovidedbyitsowngenerator.Crankingpowerforeachdieselissuppliedfromitsrespectivehighpressurestartingairsystem.Energyforstartingadieselisderivedfromtwoairreceiverseachcontainingenoughhighpressurecompressedairtoprovideformultiplestartingsequences.Therearetwodieselfueloilstoragetanksonsite,physicallyseparatedfromeachother.Thepipingisarrangedsothateachstoragetanksuppliesfueltooneemergencydieselgeneratorineachunitwhiletheotherstoragetanksuppliesfueltotheotheremergencydieselgeneratorineachuni't.Twofueloiltransferpumpsperdieselgeneratorprovidetransfercapabilityfromthestoragetankstotheindividualdieselgeneratordaytanks.Theemergencypowersourcesforthetwounitsaresimilarandareelectricallyandphysicallyisolatedfromoneanother,asarethedieselgeneratorsetsforeachunit.Eachdieselgeneratoriscapableofsupplyingacpowertoonepathofsafeshutdownequipmentwithonesupplyingpowerto4kVbusesTllAandPage4-34 TllB(T21AandT21BforUnit2)andtheothersupplyingpowertoT11CandT11D(T21CandT21DforUnit2).Thedieselgeneratorssupplypowerto600VbusesllA,llB,11C,andllDthroughthe4160VbusesT11A,TllB,TllC,andT11D,respectively.Lossofvoltagetothe4160Vdieselbusesaboveissensedbyundervoltagerelays.Uponsensing,masterrelaysautomaticallystarttheemergencygenerators,tripthenormalfeedcircuitbreakersforthe4160Vdieselbusesandtripallmotorfeederbreakersonthedieselbuses,the600Vbustiebreaker,andallnonessential600Vmotorfeederbreakers.Theemergencygeneratorcircuitbreakerwhichconnectsthedieselgeneratoroutputtothe4160/600Vbussystemisclosedwhenratedvoltageisobtained.HVACequipmentisavailabletoprovidecoolingfortheroomscontainingthedieselgeneratorsandotherEPSsupportequipment.SincetheHVACequipmentandallassociatedpowerandcontrolcablingiscontainedwithintheserooms,separationanalysisoftheHVACsystemwasnotrequired.4160VEmerencPowerSstemEach4160Vdieselbus(T11AandTllB,TllCandT11D)isfedfroma4.16kVdieselgeneratortosupplypowertotheengineeredsafetyfeaturesandothernecessaryequipmentintheeventofalossofoff-sitepower.Therearetwodieselgeneratorsassociatedwitheachunit.Eachdieselgeneratorisconnectedtotwo4160Vbuses,onetobusesTllAandTllBandonetobusesTllCandTllD.Uponlossofpowertoa4160Vdieselbus,thePage4-35 associateddieselgeneratorstartsautomaticallyormanuallybyoperatoraction.Thecircuitbreakerwhichnormally'uppliespowertothatdieselbusfromthemain4160Vbusistripped.A4.16kVcircuitbreakerineachbusisautomaticallyclosedwhenitsdieselgeneratorisatspeedandratedvoltageand.reenergizesthebus.Thedieselgeneratorswillthensupplyallequipmentwhichmustoperateunderemergencyconditionsfortherespectivesafeguardtrain.LowVoltaePowerSstemThe600Vauxiliarysystemdistributespowerforalllowvoltagestationservicedemandsotherthanthepressurizerheaters.Thenormalsourceofpowerforthe600Vsystemisthe4160Vsystembusesviathe4160/600Vtransformers.Thepressurizerheatersarefedfromthe4160Vsystembusesviatheir4160/480Vtransformersandindividualloadcentersandmotorcontrolcenters.Thepressurizersheaterscanbeconnectedtothediesels.Theswitchgearismetal-cladwith250Vdcoperatedaircircuitbreakers.The4160/600Vtransformersarefilledwithnonflammableliquid.The600Vsystemisdividedintosixbussections,fourofwhich(llA,llB,11CandllD)aresafetybuses,llAand11BforonesafetytrainandllCand11Dfortheother.Thepowersourceforeachofthesebusesis1500kVA,4160/600VtransformerwhoseprimaryisconnectedtobusesTllA,TllB,TllCandTllD,respectively.Bustie-breakersbetweenbusesllAandPage4-36 llCandbusesllBandllDareprovidedsothata1500kVAtransformercanfeedtwoadjacent600Vbuses,should'oneofthetransformersfail.Uponsignaltostartthedieselgenerators,the600Vbustiebreakersareopenedautomatically.Thebustiebreakersand600Vsourcebreakersareinterlockedtoeliminatethepossibilityofinadvertentparalleloperationofdiesels.Asimilar600VsystemisprovidedforUnit2.Two480Vbuses,llPHAandllPHC,arefedfromtwoofthe4.16kVbuses,TllAandTllDrespectively,viatwo1000kVA,4160/480Vtransformers.Thesebusessupplypowertothepressurizerheaterloads.Anidentical480VsystemisprovidedforUnit2.120VACVitalInstrumentBusSstemThe120VacVitalInstrumentBusSystemconsistsoffourseparatevitalbusesperunitwhicharesuppliedbyfourindependent5.0kVa,single-phasestaticinverters.Twooftheinvertersareconnectedtooneoftheunitbatteries,theothertwoareconnectedtothesecondbatteryinthesameunit.Theinputtoeachinverterisfroma600Vmotorcontrolcenter,oraD250Vunitbattery.TheoutputofeachinverterisconnectedtoadistributionCcabinetthroughanormallyclosedcircuitbreaker.Thedistributioncabinetssupplyalloftherequirednormalsafeshutdowninstrumentchannels.Alternativeshutdown(LSI)Page4-37 instrumentationisfeddirectlyfrom120Vacdistributioncabinetsineitherthefire-affectedorunaffectedunit.250VDCSstemThe250Vdcsystemsuppliespowerforoperationofswitchgear,vitalbusinverters,power-operatedvalvesandControlRoomemergencylighting.Thebatterysystemforeachunitconsistsoftwoseparatelylocatedsetsofleadacidcells.Eachcellbatteryhasitsownactivenormalchargerandawiredstandbycharger.Followingalossofunitnormalpower,thebatterychargersareenergizedfromtheemergencydieselgenerators.Thebatterydistributionswitchboardconsistsofseveralmetal-cladstructures,eachwitha250Vdc,two-wireungroundedmainbus,andtwo-polemanually-operatedfuseddisconnectingswitches.Duringnormaloperationthe250Vdcloadisfedfromthebatterychargers,withthebatteriesfloatingonthesystem.Uponlossofacpower,theentiredcloadisdrawnfromthebatteries.Theloadspoweredfromthebatteryincludethedieselgeneratorcircuits,4kVswitchgear,600Vand480Vloadcenters,electrically-operatedvalves,ControlRoomemergencylightingand3vitalbusinverters.Thebatteriesaresizedforthreehoursofoperationafteralossofacpower,predicateduponthePage4-38 continuousoperationofalldcemergencyequipment.However,uponstart-upoftheemergencydieselgenerator,thebatterychargersareenergizedtotakeovertheloadandrechargetheirassociatedbattery.Alldirectcurrentloadsassociatedwithengineeredsafeguardsequipmentarefullyredundant.Theseloadsarearrangedsothatonebatterysupplieseachredundantfunction.Acircuitisprovidedtocross-tietheABa'ndCDtrainplantbatteriesandloadsoneachunit.Thiscircuithasredundantisolatingswitches,oneateachpointofconnectiontothetwobatterysystems.Undernormalconditions,bothoftheseswitchesarekeptopenandthecircuitdeenergized.Thetripandclosecoilsforthe4kV,600Vand480Vbreakersareelectricallyindependentofoneanotherandmustbeenergizedtooperate.Thebreakerswillnotchangepositionifcontrolpowerislost.250VDCBatterNSstemThe250VdcNtrainbatterysuppliespowerfortheoperationoftheturbine-drivenauxiliaryfeedwaterpump(TDFP).Thisbatterysystem(perunit)consistsofonebattery(onesetofleadacidcells)andtwobatterychargers,eachsuppliedfromaseparatesafetytrainacbus.ThisNbatteryisphysicallyandelectricallyisolatedfromtheotherunitbatteries.Thebatterydistributionswitchboardconsistsofonemetal-cladstructurewitha250Vdc,two-wireungroundedmainbus,andtwo-polemanually-operatedfuseddisconnectingswitches.Page4-39 Duringnormaloperation,the250Vdcloadisfedfromoneofthebatterychargers,withthe.batteryfloatingonthesystem.Uponlossofstationacpower,theentiredcloadisdrawnfromthebattery.Themajorityoftheloadconsistsoftheelectrically-operatedauxiliaryfeedwatervalvesservingthesteamgeneratorsfromtheturbine-drivenauxiliaryfeedwaterpumpsystem,andthesteam.admissionvalvetotheturbine-drivenauxiliaryfeedwaterpump.TheauxiliaryfeedwatertosteamgeneratorvalvesarenormallyopenandtheTDFPtripandthrottlevalveisenergizedtoopen.Theremainingloadconsistsoftheauxiliaryfeedwaterturbinecontrolbus.TheAFWturbinecontrolbusencompassestheAFWturbinestartandtripcircuits,theoverspeedmonitor,thetestvalve,andtheemergencyleak-offvalve.Thebatteryissizedtoallowanticipatedoperationofthevalvesandtheircontrolcircuitswiththebatterychargersandbackupfeedcircuitsdeenergized.Thebatteryiscapableofservingtheturbine-drivenauxiliaryfeedwaterpumpforaslongasthesteamsupplytotheturbineisavailable.4.5IdentificationofSafeShutdownSstemComonentsSubsection4.4describedthespecificsystemswhichwillbeusedtoachievesafeshutdown.ThissubsectiondiscussesthemethodofselectionofsafeshutdowncomponentsatD.C.Cook.Foreachsystem,plantflowdiagram(hereafterreferredtoasPEIDs,alsorefertoFigures4.6through4.19.2)systemdescriptions,andone-linediagrams(refertoFigures4.20Page4-40 through4.23)wereusedtoidentifythepreciseprimaryflowpathsandoperationalcharacteristicsthatmustbeestablishedtoaccomplishthedesiredsafeshutdownfunction.Fromthisinformation,alistwascompiledofthecomponentswhichparticipateinthesystem'sperformanceofitssafeshutdownfunction.Thesecomponentsare:(1)Activecomponentsthatneedtobepoweredtoestablish,orassistinestablishing,theprimaryflowpathand/orthesystem'soperation.4(2)Activecomponentsintheprimaryflowpaththatnormallyareintheproperpositionwhosepowerlosswillnotresultinachangeofposition,butmaybeaffectedbyopen,shortorgroundfaultsincontrolorpowercabling.(3)Power-operatedcomponentsthatneedtochangepositiontoestablishorassistinestablishingtheprimaryflowpath,whoselossofelectricalorairsuppliesresultinthecomponentadoptingtherequiredsafeshutdownpositionbutwhichmaybeaffectedbyopen,shortorgroundfaultsincontrolorpowercabling.(4)Majormechanicalcomponentsthatsupportsafeshutdown(heatexchangersandstoragetanks).Fromtheanalysisofthesafeshutdownsystemflowpaths,thosecomponentswhosespuriousoperationwouldthreatensafeshutdownsystemoperabilitywerealsoidentified(seeTable4-3).Thisidentificationincludedthosebranchflowpathsthatmustbeisolatedandremainisolatedtoassurethatflowwillnotbesubstantiallydivertedfromtheprimaryflowpath.SeeSubsection4.7forthedetaileddiscussionofspuriousoperations.Page4-41 Alistwasgeneratedforsafeshutdowndevicesincludingdeviceidentification,normaloperatingstatus,operatingrequirementsforthevariousshutdownstages(hotstandby,hotshutdownandcoldshutdown),requiredsupportingservices,andplantlocat'ion.ThissafeshutdownequipmentlistforD.C.Cookcontainstheminimumamountofequipmentnecessarytosafelyshutdowntheunits.Forreasonsofoperationalflexibilityandtofurtherl1enhancetheconservatismsofthisanalysis,pathssuchasinjectionthroughtheboroninjectiontank(BIT)andthermalbarriercoolersforthereactorcoolantpumpswereidentifiedinSections4.3and4.4.Optionalcomponentsarenotconsideredsafeshutdown.and,therefore,arenotincludedinthesafeshutdowncomponentlistofthisreportorinthecomputerizedSafeShutdownSystemAnalysisreport.However,theoptionalcomponentsassociatedwiththeBITflowpathare,includedassafeshutdowncomponents.ThefinalsafeshutdowncomponentlistdevelopedforD.C.CookUnitsland2includestheminimumcomponentsrequiredtoprotectthesafeshutdowncapabilityfromtheexposurefiredamagepostulatedinAppendixR.TheselistsareprovidedasTable4-lforUnitlequipmentandTable4-2forUnit2equipment.Page4-42 4.6IdentificationofSafeShutdownCircuitsandCablesThecomputerdatabasedevelopedduringtheD.C.Cooksafeshutdownsystemanalysis(seeprevioussection)wasthebasicinputfortheidentificationofelectricalcircuitsessentialtoensureanadequateequipmentperformance.Alltheelectrically-dependentdevicesinTable4-'1wereusedtoidentifythecorrespondingsafeshutdownelectricalcircuits,exceptforthosemotor-operatedvalvesforwhichmanualoperationwasassumedduringlong-termcooldown(RHR,etc.).Thecircuitsidentifiedincluded.power(4160Vac,600Vac,480Vacand250Vdc),control(220Vac,120Vacand250Vdc)andinstrumentation.Theidentificationandanalysisoftheaboveessentialelectricalcircuitswerebasedonone-linediagrams,elementarycircuitdrawings,andcableblockdiagramsfromwhichthenecessarycircuitcableswereselectedforthelaterphaseofcableroutingandseparationanalysis.Foreachelectricalcircuit,allcircuitcablesthatensureoperabilitywithnodetrimentalfailureofeachcomponentwereidentifiedasrequiredforsafeshutdown.Theexceptionstotheabovecriteriaincludedannunciator,computer,motorstator,heatersandexternalmonitoringcircuitsthatareelectricallyisolatedformtheelectricalcircuitsofconcern.TheD.C.Cookconduitand'ableracewayscheduleswerethenusedtoidentifytheindividualcablephysicalroutings.AcomputerdatawasdevelopedtocontainallessentialcablesandPage4-43 theirassociatedroutings.Foreachsafeshutdownsystem,apackagewasalsodevelopedthatcontainedthefollowinginformation:(1)Safeshutdowncomponentdatasheet(2)Mark-upofcableblockdiagramswithidentifiedessentialcables(3)DatabaseoutputwithcableroutinginformationThisroutinginformationwasextractedandusedtocolor-codeandidentifytheapproximatelocationofthesecablesonelectricalcabletrayandconduitlayoutdrawings,bysystemandbyfireareas(seeSection4.8).4.7AssociatedCircuitsofConcern4.7.1IntroductionTheseparationofprotectionrequirementsof10CFR50,AppendixRapplynotonlytosafeshutdowncircuitsbutalsoto"associated"circuitsthatcouldpreventoperationorcausemaloperationofshutdownsystemsandequipment.TheidentificationoftheseassociatedcircuitsofconcernwasihperformedforD.C.CookinaccordancewithNRCGenericLetter81-12andtheStaff'sClarificationtotheGenericLetter.ThelatterfurtherdefinedtheseassociatedcircuitsofconcernasthosewhichhaveaphysicalseparationlessthanthatrequiredbySectionIII.G.2ofAppendixR,andhaveoneofthefollowing:(1)Acommonpowersourcewiththeshutdownequipmentandthepowersourceisnotelectricallyprotectedfromthecircuitofconcernbycoordinatedbreakers,fuses,orsimilardevices;Page4-44 (2)Aconnectiontocircuitsofequipmentwhosespuriousoperationwouldadverselyaffecttheshutdowncapability;(3)Acommonenclosurewiththeshutdowncables,and,(a)are.notelectricallyprotectedbycircuitbreakers,fusesorsimilardevices,or(b)willallowpropagationofthefireintothecommonenclosure.4.7.2IdentificationofAssociatedCircuitsofCommonPowerSu1andCommonEnclosuresTheelectricaldistributionsystemwasreviewedtoassurethatacceptablecoordinationandselectivetrippingisprovidedforallcircuitsontheEmergencyPowerSystem.ThereviewwaslimitedtotheEPSsincethereisnoequipmentpoweredfromthebalanceofplantdistributionsystemswhichisrequiredfor,orwhoselossofpowercouldprevent,safeshutdown.TheEmergencyPowerSystemconsistsof:(1)4160Vacswitchgear.(2)600Vacloadcentersandmotorcontrolcenters(3)480Vacloadcentersandmotorcontrolcentersforthepressurizerbackupheaters(4)120Vacvitalinstrumentationbuses(5)250Vdcdistributionbuses.Electricalcircuitfaultprotectionwasoriginallydesignedtoprovideprotectionforplantelectriccircuitsviaprotectiverelaying,circuitbreakersandfuses.Thisprotectiveequipmentwasdesignedandappliedtoensureadequateprotectionofallelectricaldistributionequipment,includingcables,fromPage4-45 electricfaultsandoverloadconditionsinthecircuits.TheselectionandapplicationofthesedeviceswasinaccordancewiththeAmericanElectricPowerdesignpractices.Theuseofthesedesignpracticesassuresthat,forelectricfaultandoverloads,cableshavealevelofprotectionwhichpreventsdegradationbeyondthatwhichwouldbeexperiencedbycontinuousoperationofthesecablesattheirratedcurrentvalue.Theoperationoftheseprotectivedevices,bylimitingcabledamage,alsopreventstheoccurrenceofthesecables.cablefaultswhichcouldcauseignitionof4Anintegralp'artoftheoriginalelectricalsystemprotectionwasthepropercoordinationofallthesedevices.Suchcoordinationassuresthattheprotectivedevicenearest(inanelec'tricalsense)tothefaultoperatespriortotheoperationofany"upstream"protectivedevices,andprovidesinterr'uptionofelectricalservicetoaminimumamountofequipment.TheoriginalelectricalprotectiondesignatD.C.Cookrequiredcoordinationofsuchelectricalprotectivedevices.TheseoriginalD.C.CookelectricaldesignpracticesprovidedconfidencethatnoassociatedcircuitsofconcernbycommonpowersupplyorbycommonenclosureTypelexistatD.C.Cook.Asanadditionalcheck,areviewwasconductedoftheexistingelectricalprotectionandcoordinationatD.C.Cookforthesafeshutdownpowersupplies.Asexpected,mostofthecircuitprotectivedevicesreviewedhadbeenproperlyselectedPage4-46 andwerecoordinated.Designchangeshavebeeninitiatedtocorrectthefewremainingdeficienciesidentifiedduringthereview.ForassociatedcircuitsofconcernbycommonenclosureType2,thedesignofthefirepro'tectionfeaturesatD.C.Cookensuresthatnosuchcircuitsexist.Associatedcircuitsofconcernthatoccurasinterveningcombustiblesareresolvedbyoneorbothofthefollowingmethods:(1)Useofnonpropagatingcablejacketmaterials(2)Useoffirestopsatappropriatecabletraysectionstopreventdamagetohotshutdownsystemcables4.7.3Surious0erationAnalsisCablesthatarenotpartofsafeshutdowncircuitsmaybedamagedbytheeffectsofpostulatedfires.Thiscabledamagemayconsequentlypreventthecorrectoperationofsafeshutdowncomponents,orresultinthemaloperationofequipmentwhichwoulddirectlypreventtheproperperformanceofthesafeshutdownsystems.Theeffectsofspuriousoperationsmaybeconceptuallydividedintotwosubclassesasfollows:(1)Maloperationofsafeshutdownequipmentduetocontrolcircuitelectricalinterlocksbetweensafeshutdowncircuitsandothercircuits;forexample,thenumerouspressurizerheaterautomaticoperationinterlocksfromprocesscontrolandinstrumentcircuits(2)Maloperationofequipmentthatisnotdefinedaspartofthesafeshutdownsystems,butthatcouldpreventtheaccomplishmentofashutdownsafetyfunction;forexample,inadvertentdepressurizationoftheReactorCoolantSystemortheMainSteamSystembyspuriousopeningofboundaryvalvesPage4-47 ForSubclassI,adetailedreviewofallsafeshutdowncircuitelementarieswasperformedandallinterlockstoothercircuitswereidentified.AFailureModesandEffectsAnalysis(FMEA)wasperformedtodetermineifmaloperationoftheseinterlocks(inadvertentopeningofclosedcontactsorclosingofopencontacts)wouldpreventtheproperoperationofthesafeshutdownequipment.Ifsuchaconditioncouldoccur,thesafeshutdowncircuitandthemaloperatinginterlockwereidentified.ForSubclass2,asystemengineeringreviewwasperformedon.plantsystemandequipmentthatwerenotpartofsafeshutdownsystemstodeterminewhichofthesecomponentshadthepotentialtodefeatsafetyfunctionsbytheirspuriousoperation.Thesecomponents,theirnormalandtheirunacceptableoperatingstates,alongwiththeirassociatedcontrolcircuits,wereidentifiedandtabulated.AFMEAwasperformedforcablesofthesecircuitstodetermineifconductor-to-conductorshorts,conductoropencircuitsorconductorgroundscouldresultin'acomponenttransitiontoanunacceptablestate.Ifsuchaconditioncouldnotoccur,thecomponentwasremovedfromthepotentiallist.Theaboveexerciseresultsinalistofpotentialspuriousoperationcandidatesforwhicharesolutionwasrequiredtoprotectsafeshutdowncapability.Forthepurposeofconductingtheseanalyses,thelossofinstrumentairoroff-sitepowerwasassumedonlyforthosecaseswheresuchalosscouldcauseunacceptableconsequences.Page4-48 Alternatively,iftheexistenceofinstrumentairoroff-sitepowerresultedinunacceptableconsequences,thenthesewereassumedavailable.Theresultsoftheseanalysesweretabulatedandresolutionwasachievedby:(1)Providingameanstoisolatetheequipmentwhennotnormallyneeded(e.g.,removepowercables,opencircuitbreakers),or(2)Providingameanstodetectthenundertakingprocedurestoofequipment(e.g.,openingspuriousoperation,actuationetc.).spuriousoperationsanddefeatthemaloperationofbreakerstoremoveofamasterswitch,Forthesepotentialspuriouscircuitsorcomponents,resolutionsareshowninTable4-3and,totheextentnecessary,willbeincorporatedintooperatingprocedures.Forthepurposeofconductingthesespuriousoperationanalyses,thelossofinstrumentairoroff-sitepowerwasassumedwheresuchalosscouldcauseunacceptableconsequences.Alternatively,iftheexistenceofinstrumentairoroff-sitepowerresultsinunacceptableconsequences,thentheywereassumedavailable.Inorderforcablefaultsthatgeneratespuriousoperationtooccur,variousconditionsmustexistsynergisticallyatthecablefaultlocation:(l)Sufficientenergymustexistduetothefiretocreatefailureofthecablejacketandinsulatingmaterial.(2)Thefailureofthejacketandinsulatingmaterialmustoccurinawaythatdirectlyexposesthecableconductors.Page4-49 (3)Foreachshort,twoormorespecificconductorsmustcomeintodirectcontactcausinglowimpedenceconductor-to-conductorconnections.(4)Forcertaintypesofspuriousoperation,multipleelectricallyindependentshortsmustoccur.(5)Noadditionalconductorsthatwouldcausecircuitfaultcurrentsandoperationofcircuitprotectivedevicesmayparticipateintheshortcondition.(6)Nogroundfaultsthatwouldcauseoperationofcircuitprotectivedevicesmustoccur.ThespuriousoperationanalysisperformedforDonaldC.Cookrecognizedtheextremelylowprobabilityofcertaintypesofthesefaultedconditions.Thefollowingcableshortconditionscausingspuriousoperationwereconsideredofsufficientlylowlikelihoodthattheywereassumednottorequireadditionalanalysisormodification:CASEl)Threephase-acpowercircuitcable-to-cablefaults(4kV,600Vand480V)CASE2)Twowireungrounded-dcpowercircuitcable-to-cablefaults(250V)CASE3)Twowireungrounded-dccontrolcircuitcable-to-cablefaults(250V)CASE4)Singlephaseungrounded-accontrolcircuitcable-to-cablefaults(220V)WithrespecttoCases1)and2),noconductor-to-conductorfaultswithinthesamepowercablecancausespuriouspoweringoftheassociateddevice.Onlypowercable-to-cableconnectionsbetweenonedeenergizedandoneenergizedpowercircuitcouldpermitoperation.Forthe'aseofthethree-phase-accircuit,Page4-50 threeelectricallyindependentcable-to-cableshortsmustoccurwithoutgroundsinordertopowertheassociateddevice.Similarly,forthetwo-wireungroundeddcpowercircuit,twoelectricallyindependentcable-to-cableshortswithoutgroundsmustoccur.ThelikelihoodofsuchoccurrenceshasbeenacknowledgedbytheNRCStafftobesufficientlylowtopermitexcludingsuchfaultedconditionsfromconsideration(FederalRegisterVol.48,No.86at19963).Thefundamentalbasisforexcludingsuchshortsfromconsiderationisbasedontheneedtoprovidemultiplecable-to-cableelectricallyindependentfaultsinorderforspuriousoperationtooccur.WithrespecttoCases3)and4),IndianaandMichiganElectricCompanyhasexcludedsuchcable-to-cablefaultscausingspuriousoperationbasedonsimilartechnicalconsiderations.ConcerningCase3),alldccontrolcircuitsatD.C.Cookareungrounded.Inorderforspuriousoperationtooccur,duetocircuit-to-circuitfaultsbetweendc,circuitssuppliedfromdifferentsources,ataminimum,twoelectricallyindependentcable-to-cableshortswithoutgroundsmustoccur.ThisisidenticaltothetypeofshortedconditionsdiscussedinCase2).Furthermore,thesamecondition,twoindependentcable-to-cableshorts,mustoccurevenforthosedccircuitssuppliedfromthesamesource.ThisisduetotheIndianaandMichiganElectricCompanydesignstandardthat,ingeneral,requiresthatPage.4-51 thecontrolswitchandrelaycontacts"doublebreak"thepositiveandnegativecontrolleadsforcomponentswhosespuriousoperationcouldaffectsafeshutdown(e.g.,solenoidandmotor-operatedvalves)(seeFigure4.34).Theimplementationofthis.designstandardforthesecontrolcircuits(250Vdcand220Vac)atDonaldC.Cookpreventssinglecable-to-cablefaultsfrominitiatingspuriousoperation.FortheungroundedaccontrolcircuitsinCase4),theidenticalconsiderationexists.MCCtransformersecondary220Vaccontrolcircuitsareungrounded.Therefore,ataminimum,twocable-to-cableshortsmustsimultaneouslyoccurinorderforspuriousoperationtoresultforcircuitssuppliedfromdifferentsources.Inaddition,forcircuitssuppliedfromthesamesource',the"doublebreak"IndianaandMichiganElectricCompanydesignstandardwouldrequiretwocable-to-cableindependentshortstooccurpriortodevicespuriousoperation.ThecontrolcircuitcableconstructionatD.C.Cookfurtherdecreasestheprobabilityofanycable-to-cablefaultsduetotheextensiveuseofasbestos-jacketedcontrolcable.Asbestos-braidedcablejacketingpreventstheintimateconductor-to-conductorcontactrequiredforhotshortsbecausethejacketingretainsitsphysicalintegrityforthefullspectrumofexposurefirespostulated.Inthoseinstallationswhereasbestosjacketedcableisnotused,onlyIEEE-383qualifiedcableexists.Thesecablingjacketcompounds,althoughnotasstructurallyimperviousPage,4-52 tofireeffectsasasbestos,haveextremelyhighsofteningtemperaturesandarenotpronetotheconductorbreakthroughphenomenathatoccurwithlowertemperaturejacketmaterialssuchasPVC.4.7.4SulementarInformationRelatedtoTable4-3ThissectionprovidessupplementaryinformationrelatedtoTable4-3,"PotentialSpuriousMalfunctionsThatCouldAffectSafeShutdown-ResolutionStatementsConcerningProceduralDetectionandTermination."TheconceptsofproceduraldetectionandisolationwereusedintheResolutioncolumnofTable4-3torepresentthefactthatsafeshutdownprocedureswouldcontainsufficientinformationtopermitplantoperatingpersonnelto:(1)Assesstheperformanceofsafeshutdownfunctionsusingthesafeshutdowninstrumentationavailable(2)Identifyonacomponentbasisthosecomponentswhosespuriousoperationcouldbecausingthesafeshutdowninstrumentationoff-normalindications(3)Identifyonacomponentbasisthespecificoperatoractions,thatcouldbetakentomitigatetheconsequencesofthecomponent'sspuriousoperationThecomponentsinTable4-3whoseresolutionrequirespost-fireoperatoractioncanbesegregatedintofivegeneralcategories.Thesearelistedbelow.Category1:PotentialSurious0erationsThatMustBeResolvedforColdShutdownOnlThecomponentsinthiscategoryareILS-950,ILS-951,IM0-330,'M0-331,IM0-340,IM0-350,ICM-305,andICM-306.Forthesecomponents,operator.verificationofappropriatesystemPage4-53 alignmentandcomponentavailabilitywillbeprocedurallyrequiredpriortocoldshutdowninitiations.Category2:ComonentsThatPermitLetdownfromtheReactorCoolantSstemThesecomponentsincludeQRV-ill,QRV-112,QRV-160,QRV-161,QRV162gQRV113/QRV114QRV170'RV151NRV152/NRV153NSO-021throughNS0-064.SpuriousoperationofselectedcombinationsofthesecomponentsmaycausesufficientuncontrolledletdowntoimpacttheabilityoftheCVCSchargingpumps(150gpmeach)toprovideadequatemakeuptotheReactorCoolantSystem.Monitoringofpressurizerlevelinstrumentationwillprovidetheoperatorwithsufficientprimaryinformationtodeterminethatspuriousoperationiscausinguncontrolledletdowninexcessofavailablechargingflow.Basedonthisandotherbackupinformationthatwilllikelybeavailable,operatorswillbeprocedurallydirectedtoinitiatecertainactionsincludingsystematicallyverifyingandpaths.isolatingallpotentialletdownCategory3:CornonentsThatMaImactCVCSMakeuTheonlycomponentsinthiscategorywhentheBITinjectionlineisutilizedareIRV-251andIRV-252.TheinstrumentationtobeusedandtheactionstobetakenforthesevalvesareidenticaltothosediscussedinCategory2.Page4-54 Category4:ComonentsThatAffectMaintenanceofRCSPressureComponentsinthiscategoryareQRV-51,LV-459CandLV-460D.1Spuriousoperationofthesecomponentswillbedetectedbymonitoringpressurizerpresure,pressurizerlevelandreactor0coolantsystemtemperatureinstrumentation.Thisinstrumentationwillprovideinformationtoindicatethat,viaspuriousoperationoftheauxiliaryspraylinevalveorlackofpressurizerheaters,reactorcoolantsystempressurecontrolmaybeimpacted.Procedureswillidentifythespecificactionstobetakentoensurethat,shouldpressurecontrolbeimpacted,isolationoftheauxiliaryspraylineorappropriatereenergizationofthepressurizerheaterswilloccur.1LV-459CandDarethelowpressurizerlevelinterlocksintheheatercontrolcircuits.Pressurizerheatersarenotrequiredforsafeshutdown.Heatersareconsideredonlyforoperationalflexibility.2IndianaandMichiganElectricCompanywishestonotethatspuriousoperationoftheauxiliaryspraylinevalvemayimpactsafeshutdownonlywhenthenormalchargingpathisutilizedtoprovidereactorcoolantsystemmakeup.Thispathisnotcreditedasprovidingreactorcoolantsystemmakeuptoachievesafeshutdown.Page4-55 Category5:ComonentsThatAffectHeatRemovalviatheSteamGeneratorsComponentsinthiscategoryareMRV-213,MRV-223,MRV-233andMRV-243.Spuriousopeningofthesecomponentsmayresultinanuncontrolledcooldown.Instrumentationavailabletodetectexcesscooldownincludessteamgeneratorpressureandlevelandreactorcoolantsystemtemperatureandpressure.Shouldsuchexcesscooldownoccur,procedureswillidentifyspecificmethodsofisolatingandcontrollingtheoperationofthesevalves.4.8IdentificationofSafeShutdownEuiment,CablesandRacewaswithinFireZoneBoundariesThecomponentsandcablesrequiredforsafeshutdownwereidentifiedbytheprocessesdescribedintheprecedingsections.ThelocationofallSSScomponentsbyfirezonewasidentifiedandaddedtotheSafeShutdownComponentList(Table4-1).TheroutingofeachSSScablewasobtainedfromtheD.C.CookCableandConduitSchedules.Thisinformationwasprogrammedintoadatabaseconcurrentlywiththefirezonelocationofeverysafeshutdowncabletroughintheplant.Individualcableroutingswereoutputtedwiththefirezonelocationofalltroughsthatwereapplicableforeachparticularcable.Theroutingofallconduitswasalsoidentifiedbyfirezone.ThecompleterouteofeachSSScableandallthefirezoneseachcableisinweretherebyidentified.Table4-4isanexampleofthetypeofprintoutdeveloped.Page4-56 Thisdatabaseinformationwasalsosortedandprintedoutbysystembyfirezone,givingacompletelistingofallSSScablesIIandtheirraceways'ithinallplantfirezones.Anadditionaldatabasewasgenerated,identifyingbydivisiontheequipment,troughsandconduitineachfirezoneforeverysafeshutdownsystem.Thislistwasthebasisfordeterminingwhichfirezonesforeachsystemrequiredadetailedphysicalseparationanalysis.Thefirezonesforeachsystemwhichcontaincablesorequipmentofdifferentredundantdivisionshadallcomponentsandraceways(troughsandconduits)identifiedandweremarkedontheplantphysicallocationdrawings.AnyzonesthatcontaincablesforbothUnitlandUnit2hadthecomponentsandracewaysmarkedonthesamesetofphysicallocationdrawingssothatthecommoneffectsofasinglefireonbothunitswouldbereadilyapparent.Thesemarked-upphysicallocationdrawingswereusedtosupporttheseparationevaluationdescribedinthesubsequentsection4.9EvaluationoftheSearationofSafeShutdownSstem(SSS)ComonentsandCablesInordertocompleteanevaluationoftheseparationofSSScomponentsandcables,safeshutdownfunctionalblockdiagramsweredeveloped.ThesediagramsareafunctionalrepresentationoftheP&IDforeachofthesafeshutdownsystemsanddepictsallofthesafeshutdowncomponents.TypicalblockdiagramsareprovidedasFigures4.24through4.33.Page4-57 Foreachsystemandeachfirezone,afunctionalblockdia'gramwasprepared.TheidentifiedforeveryfirezonelocationofSSSequipmentwasbyacheckintheproperboxontheblockdiagram.Thelocationsbyfirezoneofeverycablefor.eachcomponentwasalsoidentifiedbyacheckontheappropriateblockdiagramforeachfirezone.Inordertoensurethatthelossofsupportingsystemswouldbeproperlyidentified(suchasalossofportionsoftheelectricalpowersystemaffectingtherequiredfunctionprovidedbyacomponentofanothersystem),athirdcheckwasindicatedforeachcomponentonthefunctionalblockdiagramwheneverasupportsystem(e.g.,powersupply)foracomponentisunavailableduetoafireinthatparticularfirezone.Usingthefunctionalblockdiagrams,themarked-upphysicallocationdrawings,theprintoutsofthecomponentsandcablesineachfirezone,thefiredetectionandsuppressionbyfirezonedata,andvariousotherplantdocuments,adetailedfireseparationevaluationofeachfireareaandzonewascompleted.Usingthefunctionalblockdiagrams,itwasdeterminedwhetherbothredundantdivisionswereunavailableduetoafirewithineachfirearea.Ifbothredundantdivisionsareaffected,themarked-upphysicallocationdrawingswereusedtodeterminetheseparationbetweentheredundantcomponentsand/orcables.Thiswasdonebyfireareaandzoneforallsafeshutdownsystems.Page4-58 Withtheamountofseparationidentifiedandtheexistence(ifany)ofdetectionandsuppressioninthearea,amethodofcompliancewithAppendixR,SectionIII.Gcriteriawasdeveloped.Anymodificationsthatwererequiredweredocumented.4.10PhsicalInsectionsPhysicalinspectionsweredoneattheD.C.Cooksitetoverifythebasisfortheanalysisperformed.Duringtheseinspections,thesafeshutdowncomponentlocationswereverifiedtoagreewiththeplantdrawingsandthecomponentbyfirezonelist.Thelocationofwalls,wallopeningsanddoorsandthefireratingsofwalls,penetrations,doors,dampers,etc.,weretnoted.Thepresenceofinterveningcombustiblematerialsorfirehazardswasdetermined.Thelocation,typeandquantityoffiredetectorsineachfirezonewererecorded.Theexistenceandtypeoffiresuppressionsystemswerenoted.Asurveywasmadeoftheactualplantroutingsforracewayandwascomparedtothemarked-upphysicallocation'rawingsandanydiscrepancieswerecorrectedtotheas-builtarrangement.Thefeasibilityofanypr'oposedmodificationswasalsocheckedandnoted.4.11IdentificationofAreasofConformance/NonconformancewithAendixR,SectionIII.GTheresultsofthedetailedseparationanalysesdescribedintheprecedingsectionsindicate:(1)ThefirezonesthatmeetthecriteriaofAppendixR,SectionIII.G,Page4-59 (2)Thefirezonesrequiringmodificationstomeetthecriteria(3)ThefirezonesthatincorporateequivalentprotectionandforwhichexemptionsarerequestedAsummaryoftheresultsofthatanalysisaredocumentedinTable1-1ofSectionl.Page4-60 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-,UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESTK-33'CM-250ICM-251IMO-255IMO-256TK-llIMO-910QRV-251IMO-911PP-50EREFUELINGWATERSTORAGETANKBITOUTLETISOLATIONMOVBITOUTLETISOLATIONMOVBITINLETISOLATIONMOVBITINLETISOLATIONMOVBORONINJECTIONTANKRWSTTOCCPUMPSISOMOV-YARD383838383862ARWSTTOCCPUMPSISOMOVCENTRIFUGALCHARGINGPUMPE62B62BCHARGINGFLOWCONTROLAOV62AAM-DAZV-AAM-DAZV-AAM-DCRID-IIIAZV-ATllDMCCD'P-50E(LO)CCPUMPELUBEOILPUMP62BAB-DPP-50WCENTRIFUGALCHARGINGPUMPW62CTllAMCABIMO-51IMO-52IMO-53IMO-54CS-534BITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJFROMCHGPUMPCROSS-TIEHEADERPP-50W(LO)CCPUMPWLUBEOILPUMP62C6666666662CAB-AEZC-CEZC-BEZC-DEZC-APAGE1OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS*"*CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENTCS-535CS-536DESCRIPTIONSEALINJECTIONFROMCHGPUMPCROSS-TIEHEADERCHGPUMPDISCHGTOCROSS-TIEHEADERFIREZONE62C62CPOWERSUPPLIESQMO-200NORMALCHARGINGISOQMO-201NORMALCHARGINGISOQMO-451VCTTOCHGPUMPISOQMO-452VCTTOCHGPUMPISO62A62A44N44NAM-DAZV-AAM-DAZV-APAGE2OF17

~i AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***REACTORCOOLANTSYSTEMCOMPONENTN31N32NLI-151NLP-151NLP-152NLP-153LSI-3NPS-121NPS-122NTR-110NTR-120NTR-130NTR-140DESCRIPTIONSOURCERANGEMONITORINGCHANNELSOURCERANGEMONITORINGCHANNELPRESSURIZERWATERLEVELPRESSURIZERWATERLEVELPRESSURIZERWATERLEVELPRESSURIZERWATERLEVELLOCALSHUTDOWNSTATIONRCSPRESSURE(W.RANGE)RCSPRESSURE(W.RANGE)LOOP1THTEMPERATURELOOP2THTEMPERATURELOOP3THTEMPERATURELOOP4THTEMPERATUREFIREZONE103103122122122122666667676767POWERSUPPLIESCRID-ICRID-IICRID-IVELSCCRID-ICRID-IICRID-IIIELSCCRID-IICRID-IIIELSCCRID-IIICRID-ICRID-IICRID-IPAGE3OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS***REACTORCOOLANTSYSTEMCOMPONENTNTR-210NTR-220NTR-230NTR-240SV-45ASV-45BSV-45CLSI-5LSI-6DESCRIPTIONLOOP1TCTEMPERATURELOOP2TCTEMPERATURELOOP3TCTEMPERATURELOOP4TCTEMPERATUREPRESSURIZERSAFETYVALVEPRESSURIZERSAFETYVALVEPRESSURIZERSAFETYVALVELOCALSHUTDOWNSTATIONLOCAL-SHUTDOWNSTATIONFIREZONE676767676767673312POWERSUPPLIESCRID-IICRID-IICRID-IICRID-IIELSCELSCPAGE4OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***MAINSTEAMSYSTEMCOMPONENTMCM-221MCM-231MPP-220MPP-221MPP-222MPP-230MPP-231MPP-232MRV-223MRV-233SV-1SV-2SV-3MPP-210MPP-211MPP-212MPP-240MPP-241MPP-242DESCRIPTIONFIREZONESG2PRESSURESG2PRESSURESG2PRESSURESG3PRESSURESG3PRESSURESG3PRESSURESG2POWEROPERATEDATMOSPHRELIEFVALVESG3POWEROPERATEDATMOSPHRELIEFVALVESG2&3SAFETYVALVESSG263SAFETYVALVESSG263SAFETYVALVESSG1PRESSURESG1PRESSURESG1PRESSURESG4PRESSURESG4PRESSURESG4PRESSURE108108108108108108108108108108108333333333333STEAMSUPPLY(SG2)TOPP-4108STEAMSUPPLY(SG3)TOPP-4108POWERSUPPLIESAM-AAM-DCRID-ICRID-IICRID-IIICRID-ICRID-IICRID-IIICRID-IICRID-IICRID-ICRID-IICRID-IVCRID-ICRID-IICRID-IVPAGE5OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS***MAINSTEAMSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESMRV-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 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***AUXILIARYFEEDWATERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESBLP-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)EMERGENCYLEAK-OFFAOV(PP-3W)MOTORDRIVENAUXILIARYFEEDPUMPWEMERGENCYLEAK-OFFAOV(PP-3E)MOTORDRIVENAUXILIARYFEEDPUMPEEMERGENCYLEAK-OFFAOV(PP-4)TURBINEDRIVENAUXILIARYFEEDPUMP101101121212121212012017A17A17D17D17E17ECRID-IIICRID-IIIABNEZC-DABNEZC-DELSCCRID-IIICRID-IIIELSCTllAAFWTllDDCNDCNMCABMCCDPAGE7OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS"**AUXILIARYFEEDWATERSYSTEMCOMPONENTPP-4/T-TFMO-211FMO-212FMO-241FMO-242LSI-1TK-32BLI-110BLI-120BLI-130BLI-140BLP-110BLP-111BLP-120BLP-121BLP-130BLP-131BLP-140BLP-141FCRV-51CONDENSATESTORAGETANKYARDSG1WATERLEVEL(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)66CONDENSATESTORAGETANK17CCROSS-TIE.DESCRIPTIONFIREZONEPP-4-TRIP6THROTTLEMOV17ESG1SUPPLYMOV(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

AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS"**AUXILIARYFEEDWATERSYSTEMCOMPONENTESW-109ESW-115ESW-243DESCRIPTIONFIREZONESWSUPPLYTOMOTORDRIVEN17DAFWPUMP1ESWSUPPLYTOTURBINEDRIVEN17EAFWPUMPTDSWSUPPLYTOMOTORDRIVEN17AAFWPUMP1WPOWERSUPPLIESFW-129LSI-4AFWCROSS-TIELOCALSHUTDOWNSTATION17D5ELSCPAGE9OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS**"COMPONENTCOOLINGWATERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESCMO-410CMO-415CCWHEATEXCHANGEROUTLET44NMOVCCWCOMMONSERVICEHEADER44NISOMOVAM-DAM-DCMO-416CCWCOMONSERVICEHEADERISOMOV44NAM-ACMO-419CMO-420HE-15EHE-15WPP-10EPP-10WCMO-429CCW-167CCW-1721-CCW-1731-CCW-214CCWHEATEXCHANGERCCWHEATEXCHANGERCOMPONENTCOOLINGPUMPECOMPONENTCOOLINGPUMPWCCWTORHRHXISOMOV44S44S44S52WESTCCWSUCTIONCROSS-TIE44SEASTCCWSUCTIONCROSS-TIE44SWEST,CCWDISCHARGECROSS-TIE44SWESTSURGETANK,ISOLATION69VALVECCWTORHRHXISOMOV44NCCWHEATEXCHANGEROUTLET44NMOVAM-DAM-AT11DT11AMCCDMCAB1-CCW-220EASTSURGETANKISOLATION69VALVE1-CCW-256WESTCCWSUCTIONCROSS-TIE44SPAGE10OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***ESSENTIALSERVICEWATERSYSTEMCOMPONENTWMO-705WMO-707WMO-721WMO-725WMO-744WMO-754WMO-753ESWSEPP-7EDESCRIPTIONESWHEADERCROSS-TIEMOVESWHEADERCROSS-TIEMOVESWSUPPLYTODGABESWSUPPLYTODGCDALTERMAKEUPTOPP-3WALTERMAKEUPTOPP-3EALTERMAKEUPTOPP-4FIREZONE11211211411417A17D17EESWPUMP29AESWPUMP1ESTRAINER29AABD-AABD-DABD-AABD-DMANOPERMANOPERMANOPERPS-DTllDMCCDPOWERSUPPLIESWMO-701ESWSWPP-7WWMO-702WMO-731WMO-733WMO-735WMO-737ESWPUMP29BESWPUMPDISCHARGEISOMOV29BESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOVESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOV44N44N44N44NESWPUMPDISCHARGEISOMOV29AESWPUMP1WSTRAINER29BPS-DPS-AT11APS-AAM-DAM-DAZV-AAZV-AMCABPAGE11OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***RESIDUALHEATREMOVALSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESIMO-310PP-35EIMO-320PP-35WIMO-312IMO-314IRV-310IRV-311HE-17ERH-117RH-128EIMO-322IMO-324IRV-320HE-17WRH-128WICM-111ICM-129IMO-128RHRPUMPSUCTIONISOMOVRHRPUMPE1C1CRHRPUMPSUCTIONISOMOV1DRHRPUMPWlDRHRPUMPMINIMUMFLOWMOV44CRHRPUMPSCROSS-TIEMOV44CRHRHXFLOWCONTROLAOVRHRHXBYPASSFLOWCONTROLAOVRHRHEATEXCHANGER44C44CRHRHEATEXCHANGER44DRHRISOMANUALVALVE(LC)44DRHROUTLETISOMOVRHRINLETISOMOVRHRINLETISOMOV666667,RHRISOMANUALVALVE(LC)44CRHRISOMANUALVALVE(LC)44CRHRPUMPMINIMUMFLOWMOV44DRHRPUMPSCROSS-TIEMOV44DRHRHXFLOWCONTROLAOV44DABV-DTllDABV-ATllAAM-DABV-DCRID-IICRID-IIMANOPERMANOPERAM-AAZV-ACRID-IIIMANOPEREZC-CEZC-CEZC-BMCCDMCABPAGE12OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS**"RESIDUALHEATREMOVALSYSTEMCOMPONENTIMO-110IMO-120IMO-130IMO-140DESCRIPTIONSIACCUMULATORISOMOVSIACCUMULATORISOMOVSIACCUMULATORISOMOVSIACCUMULATORISOMOVFIREZONE66666666POWERSUPPLIESEZC-CEZC-BEZC-DEZC-APAGE13OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1SAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEMCOMPONENTTK-47BN1CD1DESCRIPTIONDIESELFUELOILSTORAGETANKCD6AB250VDCTRNBATTERYDIESELFUELOILTRANSFERPUMPFIREZONEYARD10613POWERSUPPLIES'/AABD-C1CD2DIESELFUELOILTRANSFERPUMP13ABD-DABD-CABD-DCDlCD2DGCDABlAB2ABD-AABD-BDGABMCC1-ABD-CMCC1-ABD-DJACKETWATERPUMPJACKETWATERPUMPDIESELGENERATORCDJACKETWATERPUMPJACKETWATERPUMPMCC1-ABD-AMCC1-ABD-BDIESELGENERATORAB15151515,151616161611C11DABD-DABD-CTDCDABD-AABD-B11A11BTDABMCCDMCABPAGE14OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESELSC1ABllAB2120VACDISTRIBUTIONPNL1-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 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-,UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEM.COMPONENTTRllBTRllD11A'1CCRID-ICRID-IICRID-IIICRID-IVMCABTDABABDESCRIPTION4KV/600VTRANSFORMER11B4KV/600VTRANSFORMERllD600VBUS11A600VBUS11C120VACINSTRDISTRPNL120VACINSTRDISTRPNL120VACINSTRDISTRPNL120VACINSTRDISTRPNLTRAINB250VDCDISTRIBUTIONCABINETTRAINB250VDCTRANSFERCABINET250VDCBATTERYABFIREZONE4142A42A5353535342C42C42DTllDMCCDTRllATR11CEZC-CEZC-DEZC-AEZC-BTDABMCABMCCDMCCDMCCDMCABMCABAB,BCHAB1BCHAB2N/APOWERSUPPLIESTllBAZV-AAM-AAM-DDCN11AC11BDTRllATR11CMCC1-AZV-AMCC1-AM-AMCC1-AM-D250VDCTRNBATTERYDISTRCABBUSTIEBREAKERBUSTIEBREAKER,4KV/600VTRANSFORMER11A4KV/600VTRANSFORMERllC44N5242A4142A42AAB-AllAllDBNMCABMCABTllATllcMCABPAGE16OF17

AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT1TABLE4-1-CONTINUEDSAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEMCOMPONENTBCHCD1BCHCD2CDMCCDTDCDDESCRIPTION250VDCBATTERYCHARGER1-CD1250VDCBATTERYCHARGER1-CD2250VDCBATTERY1-CDTRAINA250VDCDISTRIBUTIONCABINETTRAINA250VDCTRANSFERCABINETFIREZONE5555POWERSUPPLIESEZC-DEZC-CN/ATDCDCD,BCHCD1BCHCD2AB-AIAB-DABNMCC1-AB-AMCC1-AB-D250VDCTRNBATTERYDISTRCAB6N6N6NllAllDDCNPAGE17OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENTTK-33IMO-256IMO-255ICM-250ICM-251TK-llDESCRIPTIONREFUELINGWATERSTORAGETANKBITINLETISOLATIONMOVBITINLETISOLATIONMOVBITOUTLETISOLATIONMOVBITOUTLETISOLATIONMOVBORONINJECTIONTANKFIREZONEYARD3939393939POWERSUPPLIESAZV-AAM-DAM-DAZV-AQRV-251CHARGINGFLOWCONTROLAOVIMO-910RWSTTOCCPUMPSISOMOV63ACRID-111AM-DPP-50EIMO-911CENTRIFUGALCHARGINGPUMPE63BRWSTTOCCPUMPSISOMOV63B63BPP-50E(LO)CCPUMPELUBEOILPUMPT21DAZV-AAB-DMCCDPP-50WCENTRIFUGALCHARGINGPUMPW63CT21AMCABIMO-51IMO-52IMO-53IMO-54CS-534BITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJECTIONLINEMOVBITINJECTIONFROMCHGPUMPCROSS-TIEHEADERPP-50W(LO)CCPUMPWLUBEOILPUMP63C7474747463CAB-AEZC-CEZC-BEZC-DEZC-APAGE1OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS"""CHEMICALANDVOLUMECONTROLSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESCS-535CS-536QMO-200QMO-201QMO-451QMO-452SEALINJECTIONFROMCHGPUMPCROSS-TIEHEADERCHGPUMPDISCHGTOCROSS-TIEHEADERNORMALCHARGINGISONORMALCHARGINGISOVCTTOCHGPUMPISOVCTTOCHGPUMPISO63C63C63A63A44S44SAM-DAZV-AAM-DAZV-APAGE2OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***REACTORCOOLANTSYSTEMCOMPONENTN31N32NLP-151NLP-152NLP.-153NLI-151LSI-3NPS-121NPS-122NTR-210NTR-220NTR-120NTR-130NTR-230NTR-140NTR-240NTR-110DESCRIPTIONSOURCERANGEMONITORINGCHANNELSOURCERANGEMONITORINGCHANNELPRESSURIZERWATERLEVELPRESSURIZERWATERLEVELPRESSURIZER'WATERLEVELPRESSURIZERWATERLEVELLOCALSHUTDOWNSTATIONRCSPRESSURE(W.RANGE)RCSPRESSURE(W.RANGE)LOOP1TCTEMPERATURELOOP2TCTEMPERATURELOOP2THTEMPERATURELOOP3THTEMPERATURELOOP3TCTEMPERATURELOOP4THTEMPERATURELOOP4TCTEMPERATURELOOP1THTEMPERATUREFIREZONE104104123123123123747575757575757575POWERSUPPLIESCRID-ICRID-IICRID-ICRID-IICRID-IIICRID-IVELSCELSCCRID-IICRID-IIIELSCCRID-IICRID-IICRID-ICRID-IICRID-'IICRID-ICRID-IICRID-IIIPAGE3OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS***REACTORCOOLANTSYSTEMCOMPONENTSV-45ASV-45BSV-45CLSI-5LSI-6DESCRIPTIONPRESSURIZERSAFETYVALVE.PRESSURIZERSAFETYVALVEPRESSURIZERSAFETYVALVELOCALSHUTDOWNSTATIONLOCALSHUTDOWNSTATIONFIREZONE7575753422POWERSUPPLIESELSCELSCPAGE4OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***MAINSTEAMSYSTEMCOMPONENTMRV-223MRV-233DESCRIPTIONSG2POWEROPERATEDATMOSPHRELIEFVALVESG3POWEROPERATEDATMOSPHRELIEFVALVEFIREZONE109109POWERSUPPLIESCRID-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 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS***MAINSTEAMSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESSV-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 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***AUXILIARYFEEDWATERSYSTEMCOMPONENTTK-32BLP-122BLP-132BLP-112BLP-142PP-3WFRV-247PP-4PP-4/T-TFRV-258PP-3EFRV-257LSI-2FMO-221FMO-231DESCRIPTIONCONDENSATESTORAGETANKSG2WATERLEVEL(N.RANGE)SG3WATERLEVEL(N.RANGE)SG1WATERLEVEL(N.RANGE)SG4WATERLEVEL(N.RANGE)MOTORDRIVENAUXILIARYFEEDPUMPWEMERGENCYLEAK-OFFAOV(PP-3W)TURBINEDRIVENAUXILIARYFEEDPUMPPP-4-TRIP6THROTTLEMOVEMERGENCYLEAK-OFFAOV(PP-4).MOTORDRIVENAUXILIARYFEEDPUMPEEMERGENCYLEAK-OFFAOV(PP-.3E)LOCALSHUTDOWNSTATIONSG2SUPPLYMOV(PP-4)SG3SUPPLYMOV(PP-4)FIREZONEYARD10210212112117B17B17F17F17F17G17G222222CRID-IIICRID-IIICRID-III'RID-IIIT21AMCABELSCDCNABNDCNT21DMCCDAFWELSCABNABNPOWERSUPPLIESPAGE7OF17 AMERICAN.ELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS***AUXILIARYFEEDWATERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESFMO-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 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS"**AUXILIARYFEEDWATERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESESW-240ESW-243SWSUPPLYTOTURBINEDRIVEN17FAFWPUMPSWSUPPL'YTOMOTORDRIVEN17BAFWPUMP1WFW-129LSI-4AFWCROSS-TIELOCALSHUTDOWNSTATION17G5ELSCPAGE9OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***COMPONENTCOOLINGWATERSYSTEMCOMPONENT'MO-419PP-10EPP-10WCMO-410CMO-420CMO-415DESCRIPTIONCCWTO'HRHXISOMOVFIREZONE44NCOMPONENTCOOLINGPUMPE44SCOMPONENTCOOLINGPUMPW44SCCWHEATEXCHANGEROUTLET44SMOVCCWHEATEXCHANGEROUTLET44SMOVCCWCOMMONSERVICEHEADER44SISOMOVT21DMCCDT21AMCABAM-DAM-DPOWERSUPPLIESAM-DCMO-416HE-15EHE-15WCMO-429CCW-167CCW-172CCW-173CCW-214CCW-220CCW-256CCWCOMONSERVICEHEADERISOMOVCCWHEATEXCHANGERCCWHEATEXCHANGER44S44SCCWTORHRHXISOMOV52WESTCCWSUCTIONCROSS-TIE44SEASTCCWSUCTIONCROSS-TIE44SWESTCCWDISCHARGECROSS-TIE44SWESTSURGETANKISOLATION69VALVEEASTSURGETANKISOLATION69VALVEWESTCCWSUCTIONCROSS"TIE44SPAGE10OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***ESSENTIALSERVICEWATERSYSTEMCOMPONENTWMO-706WMO-708WMO-722WMO-726WMO-744WMO-753WMO-754PP-7EWMO-703ESWSEPP-7WWMO-704ESWSWWMO-736WMO-738WMO-732WMO-734DESCRIPTIONFIREZONEESWHEADERCROSS-TIEMOVESWHEADERCROSS-TIEMOVESWSUPPLYTODGABESWSUPPLYTODGCDALTERMAKEUPTOPP-3WALTERMAKEUPTOPP-4ALTERMAKEUPTOPP-3EESWPUMP11311311511517B17F17G29CESWPUMP2ESTRAINERESWPUMP29C29DESWPUMPDISCHARGEISOMOV29DESWPUMP2WSTRAINERESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOVESWTOCCWHXINLETMOVESWTOCCWHXOUTLETMOV29D44S44S44S44SESWPUMPDISCHARGEISO'MOV29CABD-AABD-DABD-AABD-DMANOPERMANOPERMANOPERT21DPS-DPS-DT21AMCCDMCABPS-APS-AAZV-AAZV-AAM-DAM-DPOWERSUPPLIESPAGE11OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***RESIDUALHEATREMOVALSYSTEMCOMPONENTIMO-310PP-35EIMO-320PP-35Wt'ESCRIPTIONRHRPUMPSUCTIONISOMOVRHRPUMPERHRPUMPSUCTIONISOMOVRHRPUMPWFIREZONE1GlG1H1HT21DMCCDABV-AT21AMCABPOWERSUPPLIESABV-DIMO-312IRV-310IRV-311IMO-314RH-117RH-128EHE-17EIMO-322IRV-320IMO-324RH-128WHE-17WICM-129ICM-111IMO-128RHRPUMPSCROSS-TIEMOV44,GRHRISOMANUALVALVE(LC)44GRHRISOMANUALVALVE(LC)44GRHRHEATEXCHANGER44GRHRPUMPMINIMUMFLOWMOV44HRHRHXFLOWCONTROLAOVRHRPUMPSCROSS-TIEMOVRHRISOMANUALVALVE(LC)RHRHEATEXCHANGERRHRINLETISOMOVRHROUTLETISOMOVRHRINLETISOMOV44H44H44H44H747475RHRPUMPMINIMUMFLOWMOV44GRHRHXFLOWCONTROLAOV44GRHRHXBYPASSFLOW44GCONTROLAOVAM-DCRID-IICRID-IIABV-DMANOPERMANOPERAM-ACRID-IIIAZV-AMANOPEREZC-CEZC-CEZC-BPAGE12OF17

AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS~**RESIDUALHEATREMOVALSYSTEMCOMPONENTIMO-110IMO-120IMO-130IMO-140DESCRIPTIONSIACCUMULATOR,ISOMOVSIACCUMULATORISOMOVSIACCUMULATORISOMOVSIACCUMULATORISOMOVFIREZONE747474POWERSUPPLIESEZC-CEZC-BEZC-DEZC-APAGE13OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2SAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESBN2CD12CD2DGCDABD-DCD10cD2ABD-CDGABABD-AELSCAB1AB2ABD-B2AB2250VDCTRNBATTERYDIESELFUELOILTRANSFERPUMPDIESELFUELOILTRANSFERPUMPDIESELGENERATORCDMCC2-ABD-DJACKETWATERPUMPJACKETWATERPUMPMCC2-ABD-CDIESELGENERATORABMCC2-ABD-A120VACDISTRIBUTIONPNL2-ELSCJACKETWATERPUMPJACKETWATERPUMPMCC2-ABD-BDIESELFUELOILTRANSFERPUMP107131318181819191919191921N/AABD-CABD-DTDCD21DABD-CABD-D21CTDAB21AABD-BABD-AABD-B21BABD-AMCCDMCABPAGE14OF17

AMERICANELECTRICPOWERSERVICECORPORATION"D.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS***EMERGENCYPOWERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIES2ABlDIESELFUELOILTRANSFER'UMP~"21ABD-BPS-APS-DAZV-AEZC-AMCC2-PS-AMCC2-PS-DMCC2-AZV-AMCC2-EZC-A29F29F44S45AB-AAB-DAB-A21ATR21B21BEZC-BEZC-CTR21D21DEZC-DBCHAB14KV/600VTRANSFORMER21B600VBUS21BMCC2-EZC-BMCC2-EZC-C4KV/600VTRANSFORMER21D600VBUS21DMCC2-EZC-D,250VDCBATTERYCHARGER2-ABl4545454545T21BTR21B21B21CT21DTR21D21DEZC-AMCABMCCDMCCDPAGE15OF17 AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2"TABIE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS**"EMERGENCYPOWERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESBCHAB2250VDCBATTERYCHARGER.452-AB2EZC-B21A600VBUS21A46ACRID-ICRID-IICRID-IIICRID-IVTDABMCABABT21AT21BT21CT21DDCNAM-AAM-D120VACINSTRDISTRPNL54120VACINSTRDISTRPNL54120VACINSTRDISTRPNL54120VACINSTRDISTRPNLTRAINB250VDCTRANSFERCABINETTRAINB250VDC,DISTRIBUTIONCABINET250VDCBATTERYAB4KVBUST21A4KVBUST21B4KVBUST21C4KVBUST21D250VDCTRNBATTERYDISTRCABMCC2-AM-AMCC2-AM-D5446C46C46D47A47A47B47B50525221C600VBUS21C46ATR21ATR21CEZC-CEZC-DEZC-AEZC-BMCABMCCDMCCDMCCDMCABMCABTDABN/ADGABMCABDGABMCABDGCDDGCDMCCDMCCDBN21A21DAB,BCHAB1BCHAB2PAGE16OF17

AMERICANELECTRICPOWERSERVICECORPORATIOND.C.COOK-UNIT2TABLE4-2-CONTINUEDSAFESHUTDOWNCOMPONENTS**"EMERGENCYPOWERSYSTEMCOMPONENTDESCRIPTIONFIREZONEPOWERSUPPLIESBCHCD1CDBCHCD2TDCDMCCDTK-47AB-AAB-D250VDCBATTERYCHARGER2-CD1250VDCBATTERY2-CD250VDCBATTERYCHARGER2-CD2TRAINA250VDCTRANSFERCABINETTRAINA250VDCDISTRIBUTIONCABINETDIESELFUELOILSTORAGETANKCD&ABMCC2-AB-AMCC2'-AB-D6060606060YARD6S6SEZC-DN/AEZC-CCD,BCHCDlBCHCD2TDCD21A21DABN21AC21BDTR21ATR21C250VDCTRNBATTERYDISTRCABBUSTIEBREAKERBUSTIEBREAKER4KV/600VTRANSFORMER4KV/600VTRANSFORMER6S46A4546A46ADCNMCABMCABTllATllcMCABPAGE17OF17 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3POTENTIALSPURIOUSMALFUNCTIONSTHATCOULDAFFECTSAFESHUTDOWNPOTENTIALSPURIOUSCOMPONENTFRV-245FRV-255FRV-256QMO-200QMO-201QRV-51QRV-111QRV-112QRV-160QRV-161QRV-162QRV-113QRV-114QRV-170LB459CLB4600SYSTEMAFAFCVCSCVCSCVCSRCSEFFECTOFMALFUNCTIONSPURIOUSOPENINGWILLDIVERTAFWFLOWTOTHECST.SAMEASABOVE.COMMONPOWERSUPPLYWITHTOFPCONTROLCIRCUITRY.MAYRESULTINLOSSOFCOMMONPROTECTION.SPURIOUSOPENINGOFBOTHNORMALCHARGINGVALVESQMO-200ANDQMO-201ANDTHEPRESSURIZERAUXILIARYSPRAYAIR-OPERATEDVALVEQRV-51(WITHCVCSPUMPSRUNNING)WILLRESULTINUN-CONTROLLEDRCSPRESSUREREDUCTION.SPURIOUSOPENINGOFQRV-111ANDQRV-112ANDEITHERONEOFTHEORIFICEISO-LATIONVALVESWILLRESULTINUNCON-TROLLEDLETDOWN.SPURIOUSOPENINGOFALLVALVESINSERIESWILLRESULTINUNCONTROLLEDEXCESSLETDOWN.SPURIOUSOPERATIONOFLOW-LOWPRESSUR-IZERLEVELSWITCHESWILLTRIPPRESSUR-IZERHEATER'SSUPPLYBREAKERSAT480VLOADCENTER11PHAOR11PHC.RESOLUTIONCIRCUITBREAKERSATDCDISTRIBUTIONPANELSCCV-ABANDCCV-CD(CONTROLROOM)TOBEKEPTOPENDURINGNORMALOPERATIONS(PRE-FIRE)(EXCEPTDURINGTEST),ENSURINGNOSPURIOUSVALVEOPENING.(AIR-OPERATEDVALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)PROVIDESEPARATECIRCUITPROTECTION(FUSE/DISCONNECTSWITCH)ATDCDISTRIBUTIONPANELOCN.DISCONNECTSWITCHTOBEKEPTOPENDURINGNORMALOPERATION(PRE-FIRE)(EXCEPTDURINGTEST),ENSURINGNOSPURIOUSVALVEOPENING.(A'IR-OPERATEDVALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)OPERATORVALVEISOLATIONATTHEPRESSURIZERPANELORBYLOCALCLOSUREOFCVCSVALVESQMO-200OR-201WILLENSUREVALVECLOSURE.(AIR-OPERATEDVALVEFAILSCLOSEDONLOSSOFAIRORELECTRICALPOWER.)PROCEDURALISOLATIONOFTHELETDOWNPATHBYOPENINGCIRCUITBREAKERATCONTROLROOMPANELSCCV-ABORCCV-CDORATDCDISTRI-BUTIONPANELSMCABORMCCDWILLENSURELETDOWNISOLATION.(AIR-OPERATEDVALVESFAILCLOSEDWITHLOSSOFAIRORLOSSOFPOWER.)(SEEABOVE)HEATERSNOTREQUIREDDURINGTHEFIRST3-4HOURSAFTERTRIP(ATSTABLEHOTSTANDBY).PROCEDURALDETECTIONANDDEENERGIZATIONOFCONTROLGROUPLOGICCABINETS1AND2(CONTROLROOMS).PAGE1OF3 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3-CONTINUEDPOTENTIALSPURIOUSMALFUNCTIONSTHATCOULDAFFECTSAFESHUTDOWNPOTENTIALSPURIOUSCOMPONENTNRV-151NRV-152NRV-153NSO-021NSO-022NSO-023NSO-024NSO-061NSO-062NSO-063NSO-064ICM-129IMO-128ILS-950ILS-951IMO-330IMO-331IMO-340IMO-350ICM-305ICM-306SYSTEMRCSRCSRHRRHRRHRRHRRHREFFECTOFMALFUNCTIONSPURIOUSOPENINGOFANYOFTHEPRESSUR-IZERPORVsWILLRESULTINRCSBOUNDARYBREACH.SPURIOUSOPENINGOFPRESSURIZERORREACTORHEADVENTVALVESWILLRESULTINBREACHOFRCSBOUNDARY.SPURIOUSOPENINGOFBOTHRHR/RCSBOUNDARYISOLATIONVALVESDURINGREACTORMODES1,2,AND3WILLRESULTINBREACHOFTHERCSBOUNDARY.SPURIOUSOPERATIONOFRWSTLOWLEVELSWITCHESTRIPRHRPUMPS.SPURIOUSOPENINGOFANYOFTHECON-TAINMENTSPRAYHEADERISOLATIONVALVESDURINGREACTORMODES4AND5WILLDIVERTRCSWATERTOTHECONTAINMENT.SPURIOUSOPENINGOFANYOFTHERHR/CVCSANDPUMPSUCTIONTIELINESWILLDIVERTRCSWATERTOTHEPRTTHROUGHSAFETYVALVESV-56.SPURIOUSOPENINGOFTHECONTAINMENTSUMPISOLATIONVALVESDURINGREACTORMODES4AND5(RHR)WILLDIVERTRCSWATERTOTHECONTAINMENT.RESOLUTIONPROCEDURALDETECTIONANDCLOSUREOFRESPEC-TIVEBLOCKVALVES(NM0-151,NMO-152,NMO-153)OROPENINGOFPORVCIRCUITBREAKERSATCONTROLROOMPANELSCCV-ABANDCCV-CD,OROPENINGOFDCDISTRIBUTIONPANELSBREAKERSATMCABORMCCD.(AIR-OPERATEDPORVsFAILCLOSEDWITHLOSSOFPOWERORLOSSOFAIR.)PROCEDURALDETECTIONANDOPENINGOFRESPEC-TIVESUPPLYBREAKERSATCONTROLROOMPANELSCCV-ABANDSSV-A1.(SOLENOID-OPERATEDVENTVALVESFAILCLOSEDWITHLOSSOFPOWER.)MOTORCONTROLCENTERSUPPLYBREAKERFOREITHERICM-129ORIMO-128WILLBEKEPTOPENDURINGREACTORMODES1,2AND3(PRE-FIRE)WITHVALVECLOSED.OPENINGOFTESTSWITCHESATCONTROLPANELRHRISOLATESTHELOWLEVELTRIPLOGIC(RHROPERATIONONLY).OPENMOTORCONTROLCENTERBREAKERSFORTHESEVALVES(ATAM-AANDAM-0)ANDVERIFYLOCALVALVEALIGNMENTBEFOREOPERATIONOFRHR.OPENMOTORCONTROLCENTERBREAKERSFORTHESEVALVES(ATAM-AANDAM-0)ANDVERIFYLOCALVALVEALIGNMENTBEFOREOPERATIONOFRHR.CLOSELOCALMANUALVALVESATTHESUCTIONOFTHERHRPUMPS(RH104EANDW)BEFOREOPERATIONOFRHR.PAGE2OF3 INDIANA8MICHIGANELECTRICCOMPANYD.C.COOKUNITS1AND2TABLE4-3-CONTINUEDPOTENTIALSPURIOUSMALFUNCTIONSTHATCOULDAFFECTSAFESHUTDOWNPOTENTIALSPURIOUSCOMPONENTIRV-251IRV"2521DGTAB1DGTCD2DGTAB2DGTCDMRV-213MRV-223MRV-233MRV"243SYSTEMSISEPSEFFECTOFMALFUNCTIONSPURIOUSOPENINGOFBOTHVALVESDURINGCVCSCHARGINGTHROUGHTHEBITPATHWILLPRESSURIZETHEBATSYSTEMANDDIVERTCVCSCHARGING.SPURIOUSCLOSINGOFANYOFTHESEBREAKERSWILLRESULTINLOADINGTHEDIESELGENERATORWITHTESTLOADBANK.SPURIOUSOPENINGOFTHESTEAMGENER-ATORPORVs(ASARESULTOF,FIRE-INDUCEDCONTROLCIRCUITFAILURES)WILLRESULTINUNCONTROLLEDCOOLDOWN.RESOLUTIONPROCEDURALDETECTIONANDTERMINATIONBYOPENINGCIRCUITBREAKERFOREITHERVALVEATDCDISTRIBUTIONPANELCCV-ABORCCV-CD(CONTROLROOM)ORATDCDISTRIBUTIONPANELMCABORMCCD(FIREZONES42COR55).(AIR-OPERATEDVALVESFAILCLOSEDWITHLOSSOFAIROFLOSSOFPOWER.)CIRCUITBREAKERSATDIESELGENERATORLOADTESTPANELSTOBEKEPTLOCKED-OPENDURINGNORMALPLANTOPERATION(PRE-FIRE)(EXCEPTDURINGDIESELTEST).PROCEDURALDETECTIONANDISOLATIONBYPLACINGTHEAUTO/MANUALCONTROLLERINMANUAL(ATTHECONTROLROOMORHSDPANELCONTROLLERS)ORINTHELOCALCONTROLINTHERESPECTIVELSISHUTDOWNSTATIONS.(AIR-OPERATEDPORVsFAILCLOSEDWITHLOSSOFAIRORLOSSOFCURRENTSIGNAL.)PAGE3OF3 STATIONSAFESHUTDOWNFIRFPLUSLOSSFUNCTIONSOFOFF-SITEPOWERREACTORPRO-TECTIONANDREACTORTRIPSWITCKGEARCONTROLRODINSERTIONINITIALREACTIVITYCONTROLRWSTBORATEDWATERSOURCECENTRIFUGALCHARGINGPUMPS(1OF2)PUMPINGCAPACITYRCPUMPSEALORBITINJECTIONINJECTIONPATH~TETHEBITINJECTIONPATHISOPTIONAI.ANDNOTREQUIREDFORSAFESHUTDOWN.SOURCERANGEMONITORINGINSTRUMENTATIONLONG-TERMREACTIVITYCONTROLRCSREACTIVITYCONTROLFIGURE4.1 SAFESHUTDOWNFUNCTIONSSTATIONFIREPLUSLOSSOFOFF-SITEPOWERRSWTWATERSOURCECENTRIFUGALCHARGINGPUMPS(1OF2)PUMPING.CAPACITYRCPUMPSEALORBITINJECTIONINJECTIONPATH~OTE'HEBITINJECTIONPATHISOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.CONTROLRCSLEAKAGERCSINVENTORYLOSSCONTROLPRESSURIZERLEVELMONITORINGINSTRUMENTATIONREACTORCOOLANTMAKEUPCONTROLRCSMAKEUPCONTROLFlGURE4.2 STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONSOFOFF-SITEPOWERPRESSURIZERSAFETYVALVESOVERPRESSUREPROTECTIONHI.LOPRESSUREINTERFACEISOLATIONDEPRESSURIZATIONPROTECTIONAUXILIARY'PRAYLINEISOLATIONPRESSURIZERHEATERSSUBCOOLINGMARGINCONTROL/VOTE:THEPRESSURIZERHEATERSAREOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.RCSPRESSUREMONITORINGINSTRUMENTATIONRCST~MONITORINGINITIALRCSPRESSURECONTROLRHRSAFETYVALVESOVERPRESSUREPROTECTIONLONG-TERMPRESSURECONTROLRCSPRESSURECONTROLFIGURE4.3 SAFESHUTDOWNFUNCTIONSSTATIONFIREPLUSLOSSOFOFF-SITEPOWERSTEAMGENERATORS(2OF4)HEATTRANSFERPATHAUXILIARYFEEDWATER(1OF3)PUMPINGCAPACITYSTEAMGENERATORSAFETYVALVEANDPORVHEATRELEASEPATH.STEAMGENERATORINLETMOV'sINJECTIONPATHRCST~ANDTcMONITORINGNATURALCIRCULATIONINITIALREACTORHEATREMOVALSTEAMGENERATORPRESSUREANDLEVELMONITORINGSTEAMGENERATORINSTRUMENTATIONRHR(1OF2)CONDENSATESTORAGETANKWITHESSENTIALSERVICEWATERBACKUPSECONDARYWATERSOURCELONG-TERMHEATREMOVALREACTORHEATREMOVALFlGURE4.4 00 SAFESHUTDOWNFUNCTIONSCVCSAFWEPSCCWESWEPSEPS(MDFP'sONLY)ESWEPSEPSCCWMS(TDFPONLY)ESWESWESW(BACKUP)RCSMSRHREPSEPSEPSCCWESWSUPPORTINGSYSTEMINTERACTIONDIAGRAMFIGURE4.6 0

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'Y00(fl-I-fLE'Zfr-V>D4'4VUNIT~IJKI4~Kfo0/Clio/4/44/4'4'4VLffitV0/8fs/Bo4/vJIrkCr/~K~>>C1>4TR/O>48~0/8/ZSIBOJCVA,"g'tCft~a<1>7Cf/CV.JSSNV1doopcvlrsJt/I'IO4rtso/K5~//84(vl-IfvltuitvTripp>>if444/I/a/4!4/414SSfcv4/Irn.K<<5faur.rrt>>(T>Q>>(AaIKav/~t(tJQOVR>o>cp45ASRv~0/8/ZS//8//VATKIKIK(tIKTT'prtlo<are<<A/pro!>>cr<<Jlt>:S.rha>818'.VVTV'.J~<It(t>4VLVPO4CTWJKf>raSt(fs-045SCHSgTR.ITCp./7/DO/Ca/SOar//Vd//14~CT~>>1>ICta4(>>'(N4KVBVBI/T~54~I~I>IS~(KA1KNI<ItaOwtiis't.cfp>>SII'T~rlc,CrciKecc'Iircrater/11t(opec/Ja<Nchw'wei(4Or>>4K((r<<,lacOcCia~+C'ctIc>(Nsto'5~ggsTBgg,T5-4~al<<~V>J(fo~cWASCewaot/cw(~1/O>LtfiKVAVf5/4(4I4It.Kr.P'14$44(sa4>>A~<~laoefKO4Cl5ZKl-l-I(1~LI~CT>SEIM7TCNVOuf>>a/ratJEtsIB4~(OwITCTII/KIC.IIlfotl5i>>WatCC(rtiraperh>4JJ(B(53TIIBI1rac55/KscaLM/atsOWO/KVJC1KK(f>ASif/~K(LK1/~A~(I'Pg+~'~~aisdWtt~~1~aa1/+C4/COArcrJtifOAVS4>X<VBuf/OICT>Ka4>>//aHL///hu'u~fgsCVKL,CIIIII/1SIIIurKW<<CrCelaaa'5r/alt4rrrspare<orKP//J4KVBusTl/CKOKT>Ket~rC/>~1~ASKle<<eLKHI1~lrarticlQct@Pi>1@'i'.'IPYKr!'Il~!1israL(CitaO~lQi/I.KPI/Trt><Nlr>Vw~f(TIITips+4<<l>ca44P/QK5E~CRKI/(.rrSK':-=:J4K/8<if/OO~(r,t~aotIIO(C>~>'TKile<<<5w,krwKrCIS!jaa4j4+7aaw~JJcA/<<TLCCBuf>/C/Krea<<clI(>(3m4VICKF,I~I4<4II(IIAtJcSOilakTIo'-'jCzKIII(f/IKtoelCt>(OV,(~>aslc.+).1<<caseprcIr/,,</tortc>>rrearprp<<KHHtace~8KCppr/1r<<WaTSV////>>8/pear.Nots>f/.Jcshs>i<<rteoolcc1stasI1OH%4htweKKrata>>KerrHwroHle~arrrtihaNetetc~1AL'>laKaaseri<<f~tlI>>AI(a>otalla<ioa(K~tea(toS.rftL1/4T>>a~I>>OAK!4tsKe>>O>NTOV!N<<4(arri~earre\arear4>>ata>>1eap>hAKAK<<o~~1>~4trara1'<<4AhcapeIa,~~Nea/1lt+>.TrerrB/8KgtaIiI~<1AW/Stiii/<<SI.v/4sicovifOI/OJOK/4BJKVt>>8.V/4C/COV.tsool/48OKVJVif>loslo*54//4C>SOVIOOo4~'4V4aWg,'A%COO1'CT~rallg6OC>VBUOl>OASC4+6ODVBuf'//CA/CTtl/CIICaeac/CO/./O<</8Ka4VV44CO>'<~33ilCta(LA/4cOo>r./soo//488RV(IRl>IS./I/44ICPV./OOOI/CO/SKVO/tl(/r(C4/4>5(JOV.CO>VI(zoKvAIdoV1fC/~ca>JKHrO./IPICerr>8~Ic/rtf<<4a<<aw>rrwt<<</rww1Karaeerrrtpc~K'I~4~~5'5t@+Ig@E~E)Q~~IiQa5%++-'ctt4tt,CTIAPERTURE!IAR980Avggg@e0>pert~,C~jCAJe(e~<<a(tr(OISra)Kc'rKCLKT7>Cc>a'i+ItsOJ(C>jOOV~I>5m/>IasKC/KCsrlCoticWJCOAAtpkr>>fa>>eet~te~Jit<<ra$Jrr>6'OOVBUDIIB>CI>Iu1rtgeeQiks4(asKT~JeeQQKO~CtISj>II!IStlJ.-'-=Tlace(eccr(4<<(crcearcrccra(cKCKccAc(K(~rtl1>arrrp>>epeg>>,ho>farorite>aO>NCIKNpaw4afrKAero'cori~KIa(>Woo>I/K<a/ho<<JVOXOSio~Ka6OOV.8l/SIII/ssOOTa'(55~~8lDOnEP-INS~ertce(trccrccat(ctNILLKccrccaK/KcA44crloeccprocrtlcckrcKcs'sohopKrcireeATJ4pfprc~hoerpeaceIfwrcptKfrKCC<<DÃkKCCCrrchc.~rrctae'<<cI~Ktrl'4'/pl56OOVBUBMIBcssEIgoo@rKtPe>S>CiaIota5KtRNV>8>OKSteataeea~IKsate>lfKMactaTao(>>Kteaca><eatsceo.IN4coaMalee<MKNMt>>~INIoKerect>>caN>>TeaeaecN~rate.NMIN~aee>>Neeaea>>NToNTtcaaae>>KMoceef(NNKMaMactolecccoeNINNTIeetMocta>>KK~>>ca<caah~TtNo>>IKNeaa(teaA~UX.ONEINEDIAG.~IKIA455538(DIANA4>CSDNOAREINCSIIICCD.DOIIALDCCOOKIWK1IJRNANTc>j1.IEk3KLO8ffi'-!;a:O~f'tgotiej~a.FIGURE4.20eCDK8CSIHJK.ICN8'F021902y53Z C\0l\l LOVJ)~~~MGD'onvAcAux.Bus,ONSET600~ACAUX.BUSIT+DEDAtohR39ITAOCLVMCJLUXBUSEDFROWSQOOXACgAUXBILSFEDFROHEUW'IM~S.OKVAiHVERTERS.OKVAINVERTER5.0XVAINV'ERTER5.0KVAINVERTER120V.ACDIST'R.CAB4CRP-A>>120V.ACDISTR.CLSCRP-hi120'V.ACDISTR.CAB>>CRP-B~120V.AC.DISTRCAB'CRP-5NEUT-BUSHEX-IIITLKNEUT-BUSMECH-INTLKNEUT-BUSMKX-IIITLKNEUT-BUSNECH-INTLKZzZ~ZgVIXIXNo0-8~isie~~I'IIS120v.ACDISTR.INSTRUMENTPANE.LCRTDII-VHC~VUlirzZQXDVKIzI@iZ~lZ~2ZgCZVlXI2lo~12.14120V.ACDISTRINSTRUMENTPANELiCRID3?>>I/IIVVrzQJZgVg2Noio~l4:~IS~le~120vACINSTQUNENT'N<I.>>(.RTDKIrzzillZgVgIZIVgK~lrrQfXDCL'~gpZIOIO~IZOV.AC..DISTRINSTRU14E>TPANEL'CRT0Z5Lg][~xAPE~K'riDHIIIX.XIIAR9ZAleeAvaBab1e.olApextareCarIIIFIGURE4.21VITAlINSTRUNE.NTBUSDISTRIBUTIONS'(STEM;SV08190815-S9

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~V 6OOVACBUSII8Mcc-AD-8K=~)BATTERYAB250VDCDISTRIB.CAB.BATTERYCD,250VDCDISTRIB.CAB.600VACBUSIIDMCC-AM-(ESS)CGABINATIONSTARTER25OVBATTERYN'OMBINATIONSTARTERII1)III%TTERYICHARGERIeABPIIJHGASHUNTHGASHUNTHGAIIBATTERYCHARGERI"CD+I~I-V-QC~UX-F-S-CQNTRQL-BUI.e+Pl.egP250VDCBATTERYDISTRIBUTIONCABINETHGAAFNTURBINEAUTOSTARTAFWTURBINERIP'1.6gPI.ePYIAPZama8CARBESTVALVEFRY-256EMEAG:.LEAK-OFFVALVE'FRV-258PKKQG.33HGA'A>6xtgzeC~gTURBINEDRIVENAUXILIARYFEEOWATERSYSTEMONE-LINEOVERSPEED'MONITORFIGURE4.23FSARFIG8.3-$JUNEIe8'SV08190815-g 4Il SGIP1MPP-210MPP-211MPP-212MRV-213SV-1SV-1SV-2SV-2SV-3SG+2MPP-220MPP-221MPP-222MRV-223SV-1SV-1SV-2SV-2SV-3MCM-221MCM-231TOTRIP8THROTTLEVALVEPP-4/T-TTURBINEDRIVENAUXILIARYFEEDPUMPLfGF.NDPAINIINTNFOVIPLIENTAI5INPEOUIPAIENTEOSTOUETOSVPPOATSTSIEIIAIITSGi3MPP-230MPP-231MPP-232MRV-233SV-1SV-1SV-2SV-2SV-3SG+4MPP-240MPP-241MPP-242MRV-243SV-1SV-1SV-2SV-2SV-3D.C.COOKAPPENDIXRPROJECTSAFESHUTDOWNFUNCTIONALBLOCKDIAGRAMFIGURE4.24SYSTEMFIREZONE 0'

UNIT2PP-3WUNIT2PP-3ETOUNIT2,S.G.184TOUNIT2,S.G.28I3IIIr<LSI-2I~LITK-32PP-3EPP-3WPP4PP"4IT-T(FROMMS)FRV-247FRV-258FRV-257FMO-222FMO-232FMO-212FMO-242FMO-241FMO-211FMO-231FMO-221S.G.2S.G.3S.G.1S.G.4BLP-120BLP-130BLP-110BLP-140BLI-120BLI-130BLI-110BLI-140IIIr-IILILSI-1,IIIILBLP-.122BLP-132BLP-'I12BLP-142BLP-121BLP-131BLP-111BLP-141JJZikMNUPMNUIPUFN'IAINFEOUIPMENTLOSTOUS10SUPP041SYSIEMNAPAII'IUNIIISIIUWN,IWIIPSIMILAIII)CCODkAPPLII4DIXRPIIQJL'CTSAFESHUTDOWNFUNCI'0NAI.I1I0CKDIAGRAMSYSILMFIRF7ONECONDENSATESTORAGETANKFIGURE4.25AF FROMUNIT2ESWHEADERWMO-706UNIT2DG-CDAFTERCOOL-ERDG-CDAFTERCOOL-ERLUBEOILCOOL-ERACKETATEROOL-ERPP-7EESWSEWMO-701WMO-707WMO-725WMO-731COMP.COOL-INGHXWMO-733WMO-744WMO-754~I~NOPAIIIIILAKEALTERNATEMAKE-UPTOSUCTIONOFAUXIIIARYFEEDPUMPSDISCHARGEIPIIIIAIINE'OUIPIIEIItLOSTOVEVOSVPPOIIlSYS'IfllAPAIIIWMO-753PP-7WSWSWWMO-702WMO-735COMP.COOL-INGHXWMO-737WMO-705WMO-708UNIT2WMO-721DG-ABAFTERCOOL-ERLUBEOILCOOL-ERACKEATERCOOL-ERIINIIISll(IWN,IINIIPIIIII.AIIIi.C.<:CiOI'PILNDIXRPROJICTSAI6SIIUTD0WNFUNCIIONALBI.OCKDIAGRAMFROMUNIT2ESWHEaDERABAFT/RERFIGURE4.26SYSI'I:MESWIIREJ.'ONE RCP+1N31NUC-NTR-210N32NUC-8NTR-240BV-46ARCPlP4SV-468SV-46CTOPRESSURIZERRELIEFTANK80~186~2RCPW2NTR-110NPS-122NTR-120NPS121NTR-220AEhO1OAVESSELNTR-140NTR-130NTR-23088+4RCP+3'OfllCOCOCIlNillNLP-151NLP-162rIlIlILSI-3lIIIIIIINLP-163NLI-151IIIPURRiPuulaClNEOUIPLIENTLOSl'UE'lOSUPPORlSTSTEllAhIIfO.C.COOKAPPENDIXRPROJECTPRESSHTRSPRESSHTRSh2PRE88HTRSG1PRESSHTRSC2PRESSHTR8CFIGURE4.27SYSTEMRCSFIREZONESAFESHUTDOWNFUNCTIONALBLOCKDIAGRAM IMO-911RCP1REACTORCOOLANTPUMPSEALINJECTIONTANK33REFUELINGWATERSTORAGETANKIMO-910P-50P-50ELOQMO-225QRV-251MINIMUMFLOWSTOP-50GPMRCP2RCP3JJXiRHSI~I~UHlAITOUIPIJfNTLOSTOUSTOSUt&04ISTSTENAIIQMO-226RCP4IMO-51RCSREACTORCOOLANTSYSTEMMAKEUPPP-50WIMO-256TANK11ICM-250IMO-52NOILIHIIHONINJLI;IIONI'AIIII'HOVHH4TOHOILHAIIUNALILLXIHILIIYNOIHI.OUIHLOSSSPP-50WLOIMO-255BORONICM-INJECTION251TANKIMO-53IMO-54I)(.(;.0()I'l'I'I:WDIXItI'ltOJI:CTSAII:SIIUI'l)OWN!-ttACIIOIPAI.ItlOCKOlACAAMFIGURE4.28SYSIIIAItill./OIIECVCS CMO411PP-10EHE-15ECCW-167CCW-172CMO-410I:INIIIII,IIIIC.IYlurIRHRPUMPERHRHXECMO-419NUII4:IIIINMALNAlllllLNI'lulilullI'AIIII'NOVIULDI'Ol'IorLRATIONALILtXUIILIIYNOTNCOUINCUSSS4UCUULNLOIonUPLnA>N>NolullnSYSILMONLY.CN(>SulitTOTNLiLTleuILNII'IIloll.CROSS.TaToTlkOTNLRUtnl'IIWIION.cnossTN10IIILOTINNUNIIW'Iloll.CROSS-llE101IIEOTNTRUNIT'LIW'NOR.CGW-256GGW-173CMO-415CMO-416RHRHXWCCM-458CCM-459RCP1RCP2CCM-453CCM-454~ENO.VPilIPMTNIAISINEOUIPMENTLOSTOUE'TosUpponTsYsTEMAPAII'IPP-10WHE-15WCMO-420RHRPUMPWCMO-429RCP3UNITISIIVWN,UNITWSIMILARCCNIRU.ClILLPUMPWRCP4IP.C.COOKAPPI:NOIXAPROJECTSAFESHUTDOWNFUNCTIONALBLOCKOIAGAAMCMO-413FIGuRE4.29SYSIChlFIRLZONECGW 0

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5.ALTERNATIVESHUTDOWN5.1IntroductionForvariousD.C.Cookplantfirezones,compliancewiththeprovisionsofSectionIII.G.2cannotbeeffectivelyoreconomicallyachievedduetotheconfigurationandcongestionofsafeshutdownequipment,cablesandassociatedcircuits.FortheseareasIndianaandMichiganElectricCompanyhasdeterminedthattheappropriatetechnicalapproachnecessarytocomplywiththeprovisionsofSectionIII.GofAppendixRistoprovideanalternativeshutdowncapability.Thissectionprovidesadescriptionofthealternativeshutdownsystemdesignstobeusedtoachievecomplianceinalltheseplantareas.ThissectionsalsoprovidessufficientinformationtotheNRCforreviewoftheproposedplantmodificationsnecessarytoprovidethesealternativeshutdowncapabilities.Inaddition,thissectionrespondstotheinformationrequestscontainedintheNRCStaff'sclarificationstoGenericLetter81-12datedMarch22,1982,

SUBJECT:

FireProtectionRule-AppendixR.ThealternativeshutdownmethodsproposedbyIndianaandMichiganforeachspecificfirezoneprovidetheabilitytoachieveandmaintainsubcriticalactivityconditionsinthereactor,maintainreactorcoolantinventory,achieveandmaintainhotstandbyconditions,andachievecoldshutdownconditionswithin72hoursandmaintaincoldshutdownconditionsthereafter.Page5-1 Thealternativeshutdownmethodsselectedensurethatnofuelcladdingdamage,ruptureoftheprimarycoolantboundary,orruptureofthecontainmentboundarywilloccur.Thealternativeshutdownmethodsselectedhavethecapabilityto:(l)Achieveandmaintaincoldshutdownreactivityconditions;(2)Maintainreactorcoolantlevelwithinthepressurizerlevelindicationrange;(3)Removereactordecayheatduringhotstandby,hotshutdownandcoldshutdown;(4)Providemonitoringofappropriateprocessvariablesnecessaryt:ocontrolalternativeshutdownequipment;and,(5)Providetheprocesscooling,lubricationandotherassociatedsupportingfunctionsnecessarytopermittheoperationoftheequipmentusedforsafeshutdown.Fivealternativeshutdownmethodshavebeenproposed.RefertoSection5e3foradetaileddiscussionofeachmethod.TheImethodsvaryfromacompletealternativeshutdownmethodthat,withtheexceptionofinstrumentation,requiresnoactiveSSSequipmentinthefireaffectedunit,tothesimpleuseoflocalpneumaticloadingstationstocontrolsteamgeneratorPORVs.The"CompleteAlternativeShutdown"methodisavailabletoachievesafeshutdownforareassuchasthecablevaultsandControlRooms.Thevarious-othersafeshutdownmethodsproposedareselectedsubsetsofthe"CompleteAlternativeShutdown"method.Page5-2 TheequipmentandcablesforeachofthealternativeshutdownsystemsareseparatedfromthefirezonesofconcerninaccordancewithSectionIII.G.2;'pecificexemptionsfromtheprovisionsofIII.G.2areidentifiedinSection7.0.Theselectedalternat,iveshutdownmethodsaccommodatebothconditionswhenoff-sitepowerisorisnotavailable.Theequipmentandsystemscomprisingeachofthealternativeshutdownmethodsarecapableofbeingpoweredbybothon-siteandoff-siteelectricalpowersystems.Therequiredequipmentandsystemsforachievinghotstandbyarecapableofmaintainingsuchconditionsuntilhotshutdownactionsarecommenced.Thenumberofoperatingshiftpersonnelexclusiveoffirebrigademembersrequiredtooperatesuchequipmentandsystemsshallbeon-siteatalltimes.Theequipmentandsystemscomprisingthemeansofachievingandmaintaininghotshutdownandcoldshutdownconditionswillbemadeoperableandcoldshutdownachievedforallalternativeshutdownmethodswithin72hours.Thematerialsandproceduresrequiredtoachievethealternativeshutdownmethodswillbeavailableon-site.5.2AlternativeShutdownSstemDescritionAsstatedinthefootnoteto10CFR50AppendixR,SectionAlternativeshutdowncapabilityisprovidedbyrerouting,relocatingormodificationofexistingsystems;dedicatedshutdowncapabilityisprovidedbyinstallingnewstructuresandsystemsforthefunctionofpost-fireshutdown.Page5-3 Historically,'lternativeshutdownsystemsprovidedbylicenseestocomplywiththeprovisionsofAppendixRinvolved:(1)Electricalisolation,viatheuseofisolationandtransferswitches,ofthoseelectricalcircuit.cablesandequipmentthatcanbeimpactedbythefire,and(2)Re-establishmentofthoseelectricalcircuitfunctionsandequipmentoperationbytransferofcircuitcontroltolocalcontrolstations.Insomecasesthisisolationandtransferofcontrolisprovidedasonealternativesystemfortheareasr'equiringalternativeshutdown(suchasControlRoomsandtheassociatedcablevaults).Inothercases,thisisolationand.transferof*controlisuniquelyprovidedforeachzonerequiringalternativeshutdown.Althoughacceptableasamethodof'ompliancewithAppendixR,thesemodificationstosafety-relatedequipmentsandcircuitsareundesirableforvariousreasons.First,theadditionofnewequipmentandcablingincreasestheprobabilityofsafetycircuitmalfunctionsduetofailureormaloperationoftheequipment.Second,theadditionofalternatecontrollocationsoutsidetheControlRoomcreatesthepotentialforinadvertentormaliciousactionsthatcouldcauselossofsystemscontrolfromtheControlRoom.DedicatedshutdownsystemshavealsobeenproposedtoachievecompliancewithAppendixR.Byprovidingacompletelyindependentmeansofachievingsafeshutdown,such'ystemsdonotPage5-4 typicallycreatesuchadverseimpactsonexistingsafetysystems,butdorequireextensiveandcostlyplantmodificationsandlongprojectcompletiontimes.Duringitsreviewofotheravailablealternativestoachievesafeshutdown,IndianaandMichiganrecognizedthatanumberofinherentD.C.Cookplantfeaturesexistthatcouldbeusedtoachievesafeshutdownviasomeotheralternativemeans.Afewoftheseimportantfeaturesare:(1)EachunithasitsownControlRoomandassociatedcablespreadingareaseparatedbythree-hourfirebarriers,withtheexceptionofthecommonconnectingdoor+(2)Thetwounitsareprovidedwiththeirownindependentandredundanton-siteemergencypowersystemsthatmeetSectionIII.Gseparationcriteriabetweenunits.TheUnit1dieselgeneratorsanddistributionequipmentarelocatedonthenorthendoftheplant,andthe'Unit2dieselgeneratorsanddistributionequipmentarelocatedonthesouthendoftheplant.(3)Theothermajorsafeshutdownsystems(ESW,CCW,AFW)arealsoindependenttrain-orientedredundantsystemsthatpresentlyhavecross-tiesbetweenunits.(4)Ingeneral,goodphysicalUnit1/Unit2separationofequipment,circuitsandcablesexists,withUnit1systemsand'quipmentoccupyingthenorthsideoftheplant'seast-westcenterlineandUnit2occupyingthesouthsidearea.(5)FewplantfirezonescontainbothUnit1andUnit2equipmentorcables.Theseandotherattributessuggestedthat,ingeneral,hypothesizedfiresifproperlycontainedwouldaffectthesafeshutdownsystemsofonlyoneofthetwoD.C.Cookunits.Theotherunit'ssafeshutdownsystemswouldingeneralbePage5-5 unaffected,withallredundanttrainsfreeoffiredamage.Thisavailabilityofallsafeshutdownpathsintheunaffectedunit,whencombinedwiththeexistingunitmanualcross-ties,suggestedthatahighlypreferredalternativeshutdownapproachcouldbedevelopedusingthesafeshutdownsystemsoftheunaffectedunit.StudieswereinitiatedtoreviewthecapabilityofthesafeshutdownsystemsintheunaffectedunittosupportAppendixRsafeshutdownrequirementsinthefire-affectedunitandtomaintainstableplantoperatingmodesintheunaffectedunit.Thestudiesconfirmedthatwithminormodificationsthesafeshutdownsystemsprovidedsuchacapability.Variousalternativeshutdownmethodswereultimatelyselectedtoaccommodatethevariousplantareasunderconsideration.Theseareallsubsetsofthecompletealternative0shutdownmethodthatwasoriginallyselectedtoaccommodatetheeffectsofcablevaultandControlRoomfires.Thecompletealternativeshutdownmethodselectedby?6MforsafeshutdownistousethesafeshutdownsystemsoftheD.C.Cookunitunaffectedbythehypothesizedfiretoachievesafeshutdowninthefire-affectedunit.Thisalternativeshutdownmethodi.stechnicallypreferredoverothermethodsrequiring.extensivecircuitisolationandmodifications,andcanbeeasilyimplementedpost-firebytheplantoperatingstaff.Afterincorporationofthevariousproposedmodificationsandwiththeexceptionof.Zone44S,onlythesafeshutdownsystemsusedtoPage5-6 providealternativeshutdownofeitherUnit1orUnit2willexistinanyonefirezonethatrequiresalternativeshutdown.Sections4.2through4.4previ'ouslyprovidedthedefinitionsofthesafeshutdownfunctions,primaryandsupportsystems,andequipment,requiredtoachievesafeshutdown.Figures4.1through4.5depictthesafetysequencesusedtoachievenormalsafe~shutdown.ModificationstothosefiguresareprovidedasFigures5.1through5.4.Themodificationsdepictthesafetysequencesusedtoachievecompletealternativesafeshutdown.Thefollowingisadiscussionoftheexistingplantfeaturesandrequiredmodificationsonasystem-by-systembasis,whichwillpermitthesafeshutdownsystemsoftheunaffectedunittoserveasthecompletealternativeshutdownsystemforthefire-affectedunit.5.2.1ChemicalandVolumeControlSstemForthosefirezoneswherehypothesizedfireswillcreatealossofthefire-affectedunit'sCVCSsystem,thefunctionsofthesystemwillbeachievedbythe'perationofaproposed'our-inchcentrifugalchargingpumpdischargeheadercross-tielinebetweenUnit1andUnit2.Manualoperationoftheline'isolationvalves,inZone5,willachieveimmediateRCSmake-upviatheRCPsealinjectionpathor,withsomemanualsystemalignment,boroninjectiontankpath.'igure5.5isahighlightedPAIDofthisproposedcross-tiemodification.Page5-7 5.2.2AuxiliarFeedwaterSstemForthosefirezoneswheretheoperabilityofallthreetrainsofauxiliaryfeedwatercanbethreatenedduetohypothesizedfire,theshutdownfunctionsoftheAFWsystemwillbeachievedbymanuallyopeningexistingmotor-drivenAFWpumpdischargeheadercross-tievalvesalongwithinitiationandalignmentoftheassociatedequipmentinoneoftheunaffectedunit'smotor-drivenauxiliaryfeedwatertrains.Localindicationofthesteamgeneratorlevelandpressure,presentlylocatedatlocalpanelsLSI-1andLSI-2,willbeupgradedandrepoweredfromtheunaffectedunit'sEPS.Steamgeneratorlevelcontrolwillbeachievedbymanuallythrottlingtheaffectedunit'ssteamgeneratorinletMOVslocateddirectlyadjacenttolocalpanelsLSI-1andLSI-2.Figure5.6isahighlightedP&IDofthisexistingcross-tiemethod.5.2.3EssentialServiceWaterSstemAsdiscussedinSection4.4.7,theESWsystemasasupportingsystemisnecessarytodirectlysupportthecoolingneedsoftheComponentCoolingWaterandEmergencyPowerSupply(dieselgenerator)Systems.Forthefirezonesrequiringcompletealternativeshutdown,withtheexceptionofFireZones29(A,B,E),29(C,D,F),theESWsystemsofthefire-affectedunitareassumedunavailableandarenotrequiredtoachievestablehotstandby.Page5-8 Forhotshutdownandcoldshutdown,operationofthefire-affectedunit'sRHRsystemwillrequiremanualrealignmentofcertainESWflowpaths.Thisrealignmentwilldivertaportionoftheunaffectedunit'sESWflowtoaCCWheatexchangerinthefire-affectedunit.ThisdiversionincombinationwithasimilarrealignmentofCCWwillprovidecoolingwatertooneRHRpumpandheatexchangerinthefire-affectedunit.ForFireZones29(A,B,E)and29(C,D,F),theonlyalternativeshutdownsystemrequiredistheunaffected.unit'sESW.FortheseareasthediversionofsufficientESWflowfromtheunaffectedunittotheaffectedunitprovidestherequiredESWsupportforallsafeshutdownsystemsinthefire-affectedunit.Thisdiversionisachievedvianormallyopenunitcross-tieMOVsthatarefreeoffiredamageforfireswithinFireZones29(A,B,E)and29(C,D,F).AsdiscussedinSection4.4.7,theESWsystemissharedbybothunits.Twooperablepumpsare.sufficienttocarrytheheatremovaldutiesoftwounitssimultaneouslythroughhotandcoldshutdown(ataminimumcooldownrate).Figures5.7.1and5.7.2arehighlightedPGIDsofthisexistingcross-tiemethod.Thecontrolcircuitsforbothunits'SWpumps,strainersanddischargevalvescurrentlyexistinvariouszonesrequiringalternativeshutdown.InordertoensurethatfiresincertainzoneswillnotcausefailuresinallfourESWtrains,circuitmodificationsareproposedthatincludetheinstallationofPage5-9 isolationrelaysandcablererouting,toensurethatbothtrainsofESWintheunaffectedunitwillbeavailableforallareasrequiringalternativeshutdown.5.2.4ComonentCoolinWaterSstemAsdiscussedinSection4.4.6,forhotstandbytheCCWsystemasasupportingsystemisnecessarytoprovidethecoolingneedsofthecentrifugalchargingpumpsand,foroperat,ionalflexibility,thecoolingneedsoftheRCPseals.Forhotshutdownandcoldshutdown,thesystemalso'rovidescoolingfortheRHRpumpsandRHRheatexchangers.Forallfirezonesrequiringalternativeshutdown,thefire-affectedunit'schargingpumpsandRCPthermalbarriercoolingarenotrequired.Forthesezones(excluding44S)theuseoftheunaffectedunit'scentrifugalchargingpumpsprovidesadequateprimarysystemmake-upviathesealinjectionpath.Forhotshutdownandcoldshutdowninthefire-affectedunit,CCWmustbeprovided"toaminimumofoneoftheaffectedunit'sRHRpumpsandheatexchangers.ThisisachievedbymanualrealignmentofexistingCCWinter-unitcross-tiestoprovideCCWflowfromtheunaffectedunit'sCCWpumpstotheappropriateCCWheatexchangerandRHRheatexchangerinthefire-affectedunit.Shouldre-establishmentofRCPthermalbarriercoolingbechosen,earlierrealignmentoftheCCWinter-unitcross-tiemaybeperformedbutthisisoptionalandnotarequiredoperationtoachievesafeshutdown.InordertoensurethatafireinvariousPage5-10 zonesrequiringalternativeshutdownwillnotcausefailuresofallfourCCWpumps'ircuitry,modificationsareproposedthatwillisolate,viacontrolcircuitrelays,thesuspectcable.TwoCCWpumpsintheunaffectedunitaresufficienttosupportallrequiredcoolingdemandsforbothunitswhensuchalternativeshutdownisrequired.BothUnit1andUnit2chargingpumpsexistinFireZone44S.Modificationsareproposedtoinstallaone-hourfirebarrierbetweentheUnit1andUnit2CCWpumps.ThiswillensurethesurvivalofeithertheUnit1orUnit2CCWpumpsTherefore,forafireinFireZone44SthatdisabledtheUnit1CCWpumps,safeshutdowncouldbeachievedbyusingtheUnit2,CCWpumpseventhoughthisareaisacompletealternateshutdownareaforUnit2accordingtoTable5-1.Figure5.8isahighlightedP&IDofthisexistingcross-tiemethod.5.2.5MainSteamAsdiscussedinSection4.4.3,initialhotstandbyheatremovalisachievedviathe'operationofsteamgeneratorsafetyvalves.Subsequentheatremovalwillbeachievedviaoperationofthesteamgeneratorpower-operatedreliefvalves(PORVs).Foralternativeshutdown,manualoperationofthePORVsfromlocalcontrolstationsnearLSI-1andLSI-2willbeachievedviapneumaticvalveloadingcontrolswithbackupmotivepowerprovidedbythepermanentplantN2accumulatoranddistributionPage5-11 header.ThePORVsalsohavethecapabilitytobeoperatedbyexistingmanualhandwheels.Figure5.9isasketchoftheproposedlocalpneumaticPORVcontrols.5.2.6ReactorCoolantSstemForfirezonesrequiringcompletealternativeshutdownandforotherzonesrequiringselectivealternativeshutdown,RCSinstrumentation,whichincludessourcerangemonitoring,hotlegwiderangetemperature,coldlegwiderangetemperature,pressurizerwiderangelevelandpressure,mustbeavailable.LocalpanelLSI-'3presentlycontainslocalindicationofpressurizerlevelandpressure.AnewLocalShutdownIndicationpanelLSI-4,locatedadjacenttoLSI-3,willincludenewsourcerangemonitoringalongwithhotandcoldlegtemperaturemonitoring.Theadditionofthenewdedicatednonsafety-relatedinstrumentchannelscoupledwithrepoweringofthenewinstrumentchannelsandtheexistingchannelsfromtheunaffectedunit'sEPSprovidethenecessaryequipmentfunctionsinthosezonesrequiringalternativeshutdown.5.2.7EmerencPowerSstemAsdiscussedinSection4.4.8,theEPSprovidessupporttoallsafeshutdownsystems.Forallfirezonesrequiringcompletealternativeshutdown,thefire-affectedunit'sEPSarenotrequiredforhotorcoldshutdown.TheEPSoftheunitunaffectedbythehypothesizedfirewillprovidethenecessaryPage5-12 electrical,powergenerationanddistributionforthealternativeshutdownsystems.Variousequipment(pressurizerbackupheaters,instrumentationandRHRpumps)intheaffectedunitcannotbeusedtosupportshutdownbecauseoftheassumedtotallossofEPSinthatunit.Thisequipmentinthefire-affectedunitwillbemadeavailablebyrepoweringtheequipmentfromtheunaffectedunit'selectricalpowersources.Forinitialhotstandby,repoweringisonlyrequiredforthevariousinstrumentsprovidedonthelocalpanelsLSI-l,LSI-2,LSI-3,LSI-4,LSI-5andLSI-6.ModificationstotheexistingLSIpanelswillbem.-detoprovidelocalmanualselectionofUnit1orUnit2powersources.Figures5.12.1and5.12.2depictinone-linediagramformthenewLSIpowersources.Figure5.13isatypicalelementarydiagramshowingtheindividualLSIpanelpowercircuitselection.Forextendedhotstandby,inadditiontotheinstrumentationpreviouslydiscussed,repoweringofonegroupofpressurizerbackupheatersmaybenecessary.Thisactivityisconsideredarepairandwillusepermanently-installedjumperpowercablesandreterminationoftheheaters.Figure5.22istheone-linediagramshowingthisrepowering.AmoredetaileddiscussionofthishotstandbyrepairisprovidedinSection6.2.Page5-13 Forhotshutdownandcoldshutdown,repoweringofoneRHRpumpfromtheunaffectedunitmayalsoberequired.ReferenceSection6.3foradetaileddiscussionofthisrepairactivity.5.2.8ResidualHeatRemovalHotshutdownandcoldshutdownrequireoperationoftheRHRsystem.OnetrainoftheRHRSysteminthefire-affectedunitwillbeavailablebyrepoweringofoneRHRpump(seeSection5.2.7),andmanualalignmentoftheassociatedRHRSystemvalves.5.3AlternativeShutdownMethodsFivealternativeshutdownmethodsarerequiredtoensurecompliancewiththe'rovisionsofAppendixRSectionIII.G.Table5-1providesali..tingofthefirezonesrequiringalternativeshutdownandthespecificalternateshutdownmethod(s)requiredtoachievesafeshutdownforeachfirezone.5.3.1MethodAS1MethodASlisdescribedas"CompleteAlternativeShutdown"and"mayrequiretheuseofallthealternativeshutdowncapabilitiesdiscussedinSection5.2.Section5.2providedinformationandadiscussionofthesystemsandequipmentusedtoprovidethiscompletealternativeshutdowncapability.Thefirezonesrequiringthisformofalternativeshutdownhavesubstantialportionsofthenormalsafeshutdownsystemslocatedinthezone.ThelocationandcongestionofthisequipmentissuchthatcompliancewithAppendixRSectionIII.G.2cannot'berationallyachieved.Page5-14 Forthepurposesofthisanalysis,intheareas"requiringMethodASl,allnormalshutdownequipmentcanbeassumedunavailable.Thezonesrequiringthismethodcanbedividedintofourgeneralgroupings.First,FireZones53,54,55,56,57,58,59,60,144and145aretheControlRooms,cablevaultandhotshutdownpanelareasforbothunits.Becauseofthenatureofthesezones,almostallnormalSSSequipmenthasrequiredcablesorcomponentsinthearea.Second,FireZones6N,6S,43,44N,and44SaretheAuxiliaryBuildingzonesthatdirectlyinterfacewiththecablevault.andControlRoomzones.Becauseoftheirphysicalproximitytotheseareas,manySSScircuitsandcablestypicallyexittheControlRoomandcablevaultareasviathesefivefirezonestotheremainingplantareas.ThethirdgroupcontainsFireZones40A,40B,41,42A,42B,42Cand42DforUnit1,and47A,47B,45,46A,46B,46Cand46DforUnit2.Thesezones,whichhousethemajorityoftheon-siteemergencypowersystemequipmentandshareacommongaseoussuppressionsystemperunit,havebeengroupedtogetherforthepurposeofthisanalysis.The-finalgroupcontainsFireZones14and20,whicharetheUnit1andUnit2TransformerRooms.Theseroomscontaincablesthatcanaffectoperabilityoftherespectiveunit'sredundantdieselgenerators.TheseroomsalsocontainthepressurizerbackupheatertransformersalongwithassociatedPageS-l5 primaryandsecondarycabling.Firesinoneoftheseroomsmaycausethelossofallon-siteacpowerfortheassociatedunit.Table5-2liststhenormalshutdownequipmentthatmustbereestablishedforallfirezonesutilizingcompletealternativeshutdown.Thetablewasdevelopedbyassumingthatallnormalshutdownequipmenthasbeenrenderedunavailableduetohypothesizedfire.,Thislimitingcondition,whichisconservative,yieldsasubsetofnormalSSSequipmentthatmustbeoperatedtoachievealternativeshutdownviaMethodAS1.Thatlistofequipmentbysystemandthemethodofoperationassumedpost-firearedepictedinTable5-2.WiththeexceptionofMethodAS3,theremainingalternative.shutdownmethodstabulatedinTable5-1aresubsetsofthiscompletealternativeshutdownmethod.Assuch,theyuseonlyportionsofthesystemsandequipmentrequiredforthecompletealternativeshutdownmethod.5.3.2MethodAS2MethodAS2,the"ChargingCross-tieandSupportingSystemsOnly"alternativeshutdownmethod,isrequiredinFireZones62A,62Band62CinUnit1and63A,63Band63CinUnit2only.TheseareasaretheUnit1andUnit2chargingpumpareas,respectively.Shouldafireoccurintheseareas,onlytheabilitytoprovidenormalchargingsystemmakeupwillbeaffected.AllothernormalSSSareoutsideofthearea.ThisalternativeshutdownmethodaddresseslossofnormalchargingflowbyprovidingCVCSmakeupviatheproposedCVCScross-tie.Page5-16 Table5-3identifiesbysystemthenormalSSSequipmentthatislostduetofiresinthesezonesandthatmustbeavailabletosupporttheCVCScross-tiemethod.NotethatnonormalSSSequipmentthatisrequiredtosupportMethodAS2isunavailableduetofiresintheseareas.5.3.3MethodAS3MethodAS3,the"EssentialServiceWaterCross-tieandSupportOnly"method,isalsoonlyrequiredinFireZones29(A,B,E)and29(C,D,F).ThesearetheUnit1andUnit2ESWpumpareas,respectively.Thisshutdownmethodisnecessarytoaddressthepotentiallossofbothoftheaffectedunits'SWpumps,dischargevalvesorstrainersforfiresinthesezones.1PThemethodprovidesforrestorationofESWflowinthefire-affectedunitvianormallyopenmotorizedheadercross-tievalves(WM0-705,WMO-706,WMO-707andWMO-708)thatexistoutsideofthesefirezonesandarefreeoffiredamage.Table5-4identifiesbysystemthenormalSSSequipmentthatislostduetofiresinthesezonesandthatmustbeavailabletosupportthisalternativeshutdownmethod.NotethatnoSSSequipmentthatisrequiredtosupportMethodAS3isunavailableduetoafireinthesezones.5.3.4MethodAS4MethodAS4,.the"LocalPORVControlOnly"method,isrequiredforthoseareaswherelossofnecessaryPORVcontroloccursduetolossofsupportingEPSorlossofPORVcontrolPage5-17 circuitcables.ThismethodisrequiredinFireZones15,33,38and52forUnit1and18,34,39and52forUnit2.InFireZones15arid18,thelossoftheEPSsupplytothePORVsrequireslocalcontrol.Intheremainingzones,lossofPORVcontrolcircuitcablesrequireslocalcontrol.LocalmanualoperationoftwoofthefourPORVsattheirrespectivelocalcontrolstationsneartheLSI-1andLSI-2panelsprovidesthenecessaryalternativeshutdowncapability.Table5-5identifiesbysystemthenormalSSSequipmentthat1hislostandthatmustbeavailabletosupportMethodAS4duetofiresinZones33,34and52.AsimilartabulationforFireZones15,18,38and39isprovidedasTable5-7.SincethesezonesalsorequireMethodAS5,"ThandTcMonitoring,"thetablereflectsthenormalequipmentthatislostandmustbeavailableforbothmethods.5.3.5MethodAS5MethodAS5,the"ThandTcMonitoringOnly"method,isrequiredonlyforthosezoneswherelossofsupportingEPSorassociatedinstrumentationloopcablesoccurs.ThismethodisrequiredinFireZones15and38forUnit1,and18and39forUnit2.Table5-6identifiesbysystemthenormalSSSequipmentthatislostduetofiresinZones15,18,38and39andthatmustbeavailabletosupportthisalternativeshutdownmethod.Page5-18 Table5-7identifiesbysystemthe'ormalSSSequipmentthatislostduetofiresinZones15,18,38and39andthatmustbeavailabletosupportbothMethodAS4andAS5inthesezones.5.4DetailedResonsetotheNRCClarificationsofGenericLetter81-12ThefollowinginformationisprovidedasadetailedresponsetoEnclosure1ofNRCMemorandumofMarch22,1982,forthefirezonesatD.C.CookUnit1andUnit2thatrequirealternativeshutdown.AsstatedinEnclosure1,theinformationrequestisgmerelyarewordingoftheSection8informationrequestcontainedinGenericLetter81-12.TheinformationrequestcontainedSection8,particularlyparagraphs(b),inGenericLetter81-12(c),(d),(e),(g),(i)and(j),andClarificationLetterEnclosure1,Paragraphs1(a)throughl(j),isprincipallyfocusedonalternativeshutdowndesignsthatutilizeisolation/transferandcontrolswitchestobypassdamagedpowerorcontrolcircuitcablingandequipment.Thisbypassingofdamagedelementsbythealternativeshutdownsystempermitsrestorationofotherelementsofthesafeshutdownsystemscircuitsunaffectedbythehypothesizedfire.Inaddition,newcircuitsandcablingaretypicallyaddedtoreestablishoperationandcontrolofnecessarynormalsafeshutdownequipment.Page5-19 Aspreviouslydiscussed,theprincipalalternativeshutdownapproachutilizedbyIndianaandMichigan,withexceptionoftherepoweringofcertaininstrumentationandisolationofESWandCCWpumpcontrolcables,doesnotattempttorestoredamagedequipmentorcircuits,butinsteadprovidesfortheuseoftheindependentsafeshutdownsystemsoftheunaffectedunittoachievealternativesafeshutdownsystemfunctions.Toalargedegreetheuseoftheunaffectedunit'ssafeshutdownsystemstoprovidesafeshutdowninthefire-affectedunitcouldbeviewedasdedicatedratherthanalternativeshutdown.Becausethisapproachisinfact,amixtureofalternativeanddedicatedshutdown,muchoftheinformationrequestedbytheNRCisrelated-tonormalcircuitsandequipmentinthefireareathatwillbeseveredorbypasseddoesnotapply.TheresponsesprovidedbelowhavebeentailoredtotheuniquecharacteristicsoftheD.C.Cookalternativeshutdownapproach.IdentifythoseareasoftheplantthatwillnotmeettherequirementsofSectionIII.G.2ofAppendixRand,'thusalternativeshutdownwillbeprovidedoranexemptionfromtherequirementsofSectionIII.G.2ofAppendixRwillbeprovided.AdditionallyprovideastatementthatallotherareasoftheplantareorwillbeincompliancewithSectionIII.G.2ofAppendixR.Tablel-lprovidesaconciseoverviewofthestatusofcompliancewithSectionIII.GofAppendixRforallfirezonesatPage5-20 theD.C.CookNuclearPlantUnits1and2.ThetableclearlyidentifieswhichzonesareorwillbeincompliancewithIII.G.2,whichzonesrequirealternativeshutdown,'ndwhichzonesrequiresomeformofexemptionfromcertainprovisionsofSectionIII.G.Listthesystem(s)orportionsthereofusedtoprovidetheshutdowncapabilitywiththelossofoff-sitepower.Resonsel.aRefertoSections4.1through4.4,whichdescribethenormalshutdownsystemsusedbythisanalysistoachievesafeshutdownforallfirezones..Asdiscussedinthesesections,thesystemsandequipmentselectedforthepurposeofthisanalysisareaminimumsetofplantsystemsthatcanbeusedtoachievesafeshutdown.Shouldalossofoff-sitepoweroccurwithoutanassumedplantfire,thesesystemsandotherswillbeavailabletoachievesafeshutdown..bForthosesystemsidentifiedin"la"forwhichalternativeordedicatedshutdowncapabilitymustbeprovided,listtheequipmentandcomponentsofthenormalshutdownsysteminthefireareaandidentifythefunctionsofthecircuitsofthenormalshutdownsysteminthefirearea(powertowhatequipment,controlofwhatcomponentsandinstrumentation).Describethesystem(s)orportionsthereofusedtoprovidethealternativeshutdowncapabilityforthefireareaandprovideatablethatliststheequipmentandcomponentsofthealternativeshutdownsystemforthefirearea.Page5-21 Foreachalternativesystemidentifythefunctionofthenewcircuitsbeingprovided.Identifythelocation(firezone)ofthealternativeshutdownequipmentand/orcircuitsthatbypassthefireareaandverifythatthealternativeshutdownequipmentand/orcircuitsareseparatedfromthefireareainaccordancewithSectionIII.G.2.Resonsel.bSections5.2,5.3andassociatedTables5-1through5-7provideadetailedresponsetotheinformationrequiredbythefirstparagraphoftherequest.Forthosecircuitsrequiringbypassandisolation,Figures5.14.1through5.18identifythecablesrequiringisolationandthefirezonelocationsofthealternativeshutdowncablesthatbypassthefirezoneofconcern.Aspreviouslydiscussed,onlythealternativeshutdownESWpumpcontrolcircuitsandcertainLSIpanelinstrumentscontaincablingthatwouldnotbefreeoffiredamageforcertainareasrequiringalternativ'eshutdown.Section5.5providesdetailedinformationonthemodificationsproposedtoensurethatthesealternativeshutdowncircuitsareisolatedfromthecircuitcablesthatarelocatedinzonesrequiringalternativeshutdown.Thissectionandreferencedfiguresalsocontaininformationonallthenewcircuitstobeprovidedtoachievealternativeshutdown.Withthe-exceptionofFireZone44S,allalternativeshutdownequipmentandcircuitsareseparatedfromthefirezonesinaccordancewithSectionIII.G.2.Page5-22 FireZone44Shasbeenidentifiedasrequiringalternativeshutdownfor.Unit2.ThefirezonecontainsallcomponentcoolingwaterpumpsforbothunitsandthereforedoesnotcomplywiththeprovisionsofSectionIII.G.2.Section7.10providesadetaileddiscussionofthetechnicalbasisforrequestinganexemptionfromtheprovisionsofSectionIII.G.2forthesepumps.Providedrawingsofthealternativeshutdownsystem(s)whichhighlightanyconnectionstothenormalshutdownsystems(PEIDsforpipingandcomponents,elementarywiringdiagramsofelectricalcabling).Showtheelectricallocationofallbreakersforpowercables,andisolationdevices,forcontrolandinstrumentationcircuitsforthealternativeshutdownsystemsforthatfirearea.Figures5.6through5.9andFigure5.11depictthepipingandcomponentconnectionsbetweenthenormalshutdownandalternativeshutdownsystems.Figures5.10.1through5.10.5identifythelocationofexistingandproposedLSIpanels.Figures5.12.1and5.12.2arethepowersupplyone-linediagramsfortheLSIpanels.Figure5.13isatypicalschematicshowingthepowerswitchingarrangementattheLSIpanels.Figure5.19.1through5.19.3andFigure5.20depictinblockdiagramformtheexistingand,proposedlocalshutdowninstrumentation.Figures5.14.1through5.18depicttheisolationrelaysandcontrolcircuitandcablingmodificationsthatensuretheCCWandPage5-23 ESWpumps,ESWstrainersandvarioussystemvalvesarefreeoffiredamageandavailabletosupportalternativeshutdown,asrequired.Reuestl.dVerifythatchangestosafetysystemswillnotdegradesafetysystems:(e.g.,newisolationswitchesandcontrolswitchesshouldmeetdesigncriteriaandstandardsintheFSARforelectricalequipmentinthesystemthattheswitchistobeinstalled;cabinetsthattheswitchesaretobemountedinshouldalsomeetthesamecriteria(FSAR)asothersafety-relatedcabinetsandpanels;toavoidinadvertentisolationfromtheControlRoom,theisolationswitchesshouldbekeylockedoralarmedintheControlRoomifinthe"local"or"isolated"position;periodicchecksshouldbemadetoverifythattheswitchisintheproperpositionfornormaloperation;andasingletransferswitchorothernewdeviceshouldnotbeasourceofafailurewhichcauseslossorredundantsafetysystems).Resonsel.dTheonlymodificationsthatwillinvolvesafety-relatedequipmentare:(1)ReroutingofESWpump,dischargevalveandstrainercables;(2)InstallationoftheCVCSpipingcross-tie;and(3)ReroutingRCSwiderangetemperatureinstrumentationcables.10CFR50.59reviewswillbeperformedfortheseandallotherproposedmodifications.Basedonpreliminaryreviews,no'hangestothesafetysystemswilldegradetheirperformanceforthespectrumofdesignbasiseventsforwhichtheyarerequired.Page5-24 Reuestl.eVerifythatlicenseeprocedureshavebeenorwillbedevelopedwhichdescribethetaskstobeperformedtoeffect'theshutdownmethod.Provideasummaryoftheseprocedures-outliningoperatoractions.Resonsel.ePlantprocedureswillbedevelopedthatwilldescribethepost-fireoperationstobeperformed.AbriefsummaryoftheseproceduresisprovidedinSection5.6forareasrequiringcompletealternativeshutdown.Althoughtheproceduresonlyutilizetheminimumsetofequipmentidentifiedinthisanalysis,equipmentnotinvolvedinthefirewillbeutilizedtotheextentpossibletoprovidemaximumoperationalfl"xibility.Verifythatthemanpowerrequiredtoperformtheshutdownfunctionsusingtheproceduresofe.aswellastoprovidefirebrigadememberstofightthefireisavailableasrequiredbythefirebrigadetechnicalspecifications.Resonsel.fForthespectrumofoperationsrequiredfortheinitialhotstandbyperiodpost-fire(approximatelytwohours),threeoperationspersonnelaresufficienttoachieveandmaintainsafeshutdowninadditiontothefirebrigademembersandthealternateunit'sControlRoomoperators.Provideacommitmenttoperformadequateacceptancetestsofthealternativeshutdowncapability.Thesetestsshouldverifythat:Page5-25 equipmentoperatesfromthelocalcontrolstationwhenthetransferorisolationswitchisplacedinthe"local"positionandthattheequipmentcannotbeoperatedfromtheControlRoom;andthatequipmentoperatesfromtheControlRoombutcannotbeoperatedatthelocalcontrolstationwhenthetransferisolationswitchisinthe."remote"position.Resonsel.Acceptancetestsofallmodificationswillbeperformedtoensurealternativeshutdownsystemperformancerequirements.ProvideTechnicalSpecificationsofthesurveillancerequirementsandlimitingconditionsforoperationforthatequipmentnotalreadycoveredbyexistingTechnicalSpecifications.Forexample,ifnewisolationandcontrolswitchesareaddedtoashutdownsystem,theexistingTechnicalSpecificationsurveillancerequirementsshouldbesupplementedtoverifysystem/equipmentfunctionsfromthealternateshutdownstationattestingintervalsconsistentwiththeguidelinesRegulatoryGuide1.22andIEEE338.Creditsmaybetakenforotherexistingtestsusinggroupoverlaptestconcepts.Resonsel.hNomodificationstotheD.C.CookTechnicalSpecificationsareanticipated,butifanyarerequired,thesewillbemadefollowingNRCacceptanceofthealternativeshutdownsystemsprovidedinthissection.Fornewequipmentcomprisingthealternativeshutdowncapability,verifythatthesystemsavailableareadequatetoperformthenecessaryshutdownfunction.Thefunctionsrequiredshouldbebasedonpreviousanalyses,Page5-26 ifpossible(e.g.,intheFSAR),suchasalossofnormalacpowerorshutdownonGroup1isolation(BWR).Theequipmentrequiredforthealternativecapabilityshouldbethesameorequivalenttothatreliedonintheaboveanalysis.Resonsel.iThesystemsandequipmentthatcomprisethealternativeshutdownmethodaspreviouslydescribedareidenticalinperformancecapabilitytothenormalshutdownsystems.Verifythatrepairproceduresforcoldshutdownsystemsaredevelopedandmaterialforrepairsismaintainedonsite.Provideasummaryoftheseproceduresandalistofthematerialneededforrepairs.Resonsel.Aspreviouslyoutlined,themodification/repairsrequiredtoachievelong-termcoldshutdownare:(1)Repoweringofpressurizerheaters(optional-notrequiredforsafeshutdown);and(2)RepoweringofoneRHRpump.Section6containsadiscussionoftherepairsandliststhematerialneededtoimplementtherepairs.5.5AlternativeShutdownModificationsThefollowingisacompilationoftheproposedequipmentandsystemmodificationsrequiredtoachieveoperabilityofthealternativeshutdownsystem.Page5-27 5.5.1CVCSCross-tieInstallationofapermanentCVCScross-tie:Thefour-inchcross-tiewithdoubleisolationisdepictedontheattachedPAID,Figure5.5.ThelinevillbeinstalledinaccordancewiththeinstallationcriteriaoftheCVCSsystem.Physicalroutingofthecross-tie,aspresentlyproposed,isoutlinedinFigure5.11.5.5.2AlternatePowertoLSIPanelsRepoweringoftheLSIpanelsfromtheunaffectedunit'semergencypowersources:Figures5.12.1and5.12.2depictinone-linediagramformtheproposedpoversupplymodificationstotheLSIpanels.Figure5.13istheassociatedelectricalschematic.Alltheinstrumentationlocatedonthepanelsisnonsafety-related.Thepowersupplycablesarealsodesignatedasnonsafety-related,althoughtheyarepoweredfromeitherunit'son-sitepoversources.Theroutingoftheunaffectedunit'spowercablingtotheLSIpanelswillcomplywiththeseparationrequirementsofSectionIII.G.2forthosefirezonesforwhichthepowercablingisrequiredforalternativeshutdovn.5.5.3ESWPumCircuitModificationsIsolationandreroutingofvariouscontrolcablesfortheESWpumps:IsolationrelayswillbeaddedtothecircuitsthatstarttheESWpumpsfromthedischargeheaderpressureswitchesasveilasfromtheoppositeunit'ssafetyinjection(SI)signal.Page5-28 hTheserelayswillbeaddedatthe4kVswitchgearforallfourESWpumps.Therelayswillensurethatelectricalopen,shortandgroundfaultsinthefirezoneswillnotpreventproperoperationoftheESWpumpsintheunaffectedunit.Table5-8identifiesthecablesthatwillbeisolated'ndtheirfirezonerouting.TheredundantESWpumpbreakercontrolsandtheirassociatedcables,whichpresentlyexistforthesepumpsinthealternateunit'sControlRoom,willberelocatedtotheirownunit'shotshutdownpanel.Inaddition,thesecondESWpump'sbreakercontrolcircuitryandassociatedcablesinthealternateunit'shotshutdownpanel'illberemoved.Thepurposeofthismodificationistoeliminatethepotentialforelectricalopen,shortandgroundfaultsinthefire-affectedunitaffectingtheESWpumpcontrolsoftheunaffectedunit.TherelocatedcontrolsonthehotshutdownpanelarenotrequiredforAppendixRsafeshutdown.Typicalcircuitrymodificationstoensureisolationof/fieldcablingareshownasFigure5.14.ThecablesthatwillbeeliminatedaretabulatedinTable5-9andarealsoshownonFigure5.15.5.5.4ESWStrainerandValveCircuitModificationsModifications,similartothosedescribedfortheESWpumpin5.5.3above,willbeimplementedfortheESWpumpdischargevalves,strainersandheadercross-tievalves.ThecablesthatwillbeeliminatedaretabulatedinTable5-9andarealsoshownonFigures5.16,5.17and5.18.Page5-29 5.5.5CCWPumCircuitModificationsIsolationofCCWpumppressureswitchandassociatedcablingwillbeaccomplishedwithisolationrelayssimilartothemethodproposedfortheESWpumppressureswitches.Table5-8identifiesthecablestobeisolated.5.5.6NewThandTcforLSIPanelsToensurethathotlegtemperature(Th)andcoldlegtemperature(Tc)informationisavailabletomonitorsafeshutdownatpanelsLSI-4,LSI-5andLSI-6,newsafety-relatedinstrumentcircuitswillbererouted.NewcablingwillberoutedfromtheRTDsviacontainmentpenetrationstothelocalpanels.ThandTcforRCSloopsland4willbeavailableatLSI-5.ThandTcforRCSloops2and3willbeavailableatLSI-6.Allfourcoolantloops'handTcwillbemadeavailableattheLSI-4panel.ThecableroutingwillbedesignedtoensurethatsufficientseparationandprotectionexistforallareasrequiringalternativeshutdownindicationofThandTc.AswithotherinstrumentationlocatedontheLSIpanels,thesetemperatureloopscanbepoweredfromeitherunit'sEPS.5.5.7NewSGPressureforLSIPanelsToensurethatsteamgeneratorpressureinformationisavailabletomonitorsafeshutdown,pressuretransmitterswillbeinstalledforsteamgenerators1,4and2,3atpanelsLSI-5andLSI-6,respectively.ThesignalswillalsoberetransmittedtoLSI-4toprovidecentralizedinformation.Page'-30 5.5.8NewSRMforLSIPanelsToensurethatsourcerangeneutronmonitoringinformationisavailabletosupportalternativeshutdown,anewSRMchannelwillbeinstalled.Thechannel'willutilizeanexistingspareex-coremonitorwellandwillprovideindicationatlocalpanelLSI-4.RoutingofallcablingrequiredwillnotviolateSectionIII.G.2criteriaforthezonesrequiringalternativeshutdown.Figure5.20isasketchoftheproposedSRMchannel.5.5.9.NewCentralizedControlPanels-LSI-4InordertoprovideacentralizedcontrolandcommunicationpointforallactionoutsidetheControlRoom,allrequiredsafesh.;itdowninstrumentationthatpresentlyexistsorisproposedonpanelsLSI-1,LS$-2,LSI-5andLSI-6willberetransmittedtopanelLSI-4,whichisadjacenttoLSI-3.AllinstrumentationrequiredforlocalshutdownindicationwillbeavailableatpanelsLSI-3andLSI-4.LocalindicationforRCSpressure,pressurizerlevel,chargingandletdownflowarepresentlylocatedonLSI-3.LocalindicationforRCShotandcoldlegtemperatures,steamgeneratorpressure,steamgeneratorlevelandsourcerangemonitoringwillbeaddedonLSI-4.Inaddition,bothLSIpanelswillhavethecapabilityofbeingpoweredfromtheunaffectedunit'sEPS.Figures5.21.1,5.21.2and5.21.3conceptuallyshowpanelsLSI-l,LSI-2,LSI-3and'LSI-4.Page5-31 5.5.10PermanentCableforPressurizerBackuHeaterReowerinToensurethattimelyrepairscanbeperformedtoreenergizeonebackupgroupofpressurizerheaters,a480VMCCwillbe.permanentlyinstalledinthefire-affectedunitforthisrepairactivity.ThisMCCwillbepowered-froma480Vswitchgearcircuitbreakerlocatedintheunaffectedunit.(RefertoFigure5.22forUnitlone-linerepresentation.)PermanentpowercableswithprefabricatedterminationswillbestoredattheMCC.Duringafire,thesecableswillberoutedfromtheMCCtotheelectricalpenetrationsforrepoweringofthreebanksofpressurizerheatersinabackupheatergroup.FurtherdiscussionoftherepairactivitiesisprovidedinSection6.2.2.5.6SummarofProceduresUsedforAlternativeShutdown5.6.1InitialHotStandbUponoccurrenceandnotificationof'majorfireinazonerequiringalternateshutdown,theControlRoomoperatorwillinitiatereactorandturbinegeneratortripsandactuationofMSIVisolation.Uponlossofmajorshutdownsystemcontrols,transferofcontrolawayfromtheControlRoomtolocalshutdownoperationcentersmayoccurwiththeoperatorstakingthefollowingimmediateactions:(1)Theunaffectedunit'sControlRoomoperatorsarenotifiedofthemajorfireandinitiatemeasurestoutilizecross-tiedalternativesystemstoachievesafeshutdowninthefire-affectedunit.(2)Asnecessarytominimizeinventorylossandpreventinadvertentoperation,isolationofvariousletdownPage5-32 (3)(4)pathsfromtheRCSisachievedbytrippingselectivecontrolpowerbreakers.Thesepathsincludeletdown,excessletdown,headandpressurizervents,RCPsealletdown,andpressurizerPORVs.AnoperatorisdispatchedtothrottleopentheUnit1-Unit2CVCSmanualcross-tievalvesandRCSmake-upisimmediatelyachievedeitherviatheRCPsealwater'njectionlinesorviatheBIT(optionalpath).ThesameoperatortransfersvariousSSSinstrumentationatlocalpanelLSI-3toprovidelocalreadoutofallSSSinstrumentation.(5)(6)AsecondoperatorisdispatchedtoopenoneorbothoftheexistingUnit1/Unit2motor-drivenauxiliaryfeedwaterpumpmanualunitcross-tievalves(FW-129).Thesecondandathirdoperatorverifymainsteamisolationandoperationofthesteamgeneratorsafetyvalves.(7)Thesameoperatorsmanuallyalignthefire-affectedunit'ssteamgeneratorinletvalves(FM0-212,FM0-242,and/orFM0-222,FMO-232)andestablishlocalmanualcontrolofthevalves.(8)(9)(1O)(11)OperatorstwoandthreetransfersteamgeneratorinstrumentationatlocalpanelsLSI-1andLSI-2.eTheunaffectedunit'sControlRoomoperatorsclosetheunaffectedunit'ssteamgeneratorinletvalves(FM0-212,FMO-242and/orFM0-222,FMO-232)andstarttheappropriateunaffectedunit'smotor-drivenauxiliaryfeedwaterpumpfromtheControlRoom.StablecontroloftheRCSmake-upsystemisachievedbymonitoringLSI-3panelinstrumentationandthrottlingtheCVCScross-tievalves.StablecontrolofsteamgeneratorsinventoryandRCSheatremovalisachievedbymonitoringLSI-1andLSI-5and/orLSI-2andLSI-6panelsinstrumentationandmanualcontroloftheappropriatesteamgeneratorinletvalvesandPORVs.(12)TheabovefourLSIstationsLSI-3andLSI-4(locatedindications.arecoordinatedbyusingnexttoeachother)Page5-33 Theseactions,whichshouldeasilybeaccomplishedwithinarelativelyshort(30-minute)timeframe,aresufficienttoachieveandcontrolbothprimaryandsecondarymake-upandheatremoval.Therefore,safehotstandbyconditions{theunit'ubcriticalandattemperatureandpressure)willbeachieved.5.6.2Lon-TermHotStandbShouldtheextentoffiredamagebesuchthatimmediatereoccupancyoftheControlRoomandreestablishmentof-onetrainofthefire-affectedunit'ssafeshutdownsystemsareno'tfeasible,long-termhotstandbyconditionscanbemaintainedbycontinueduseofthealternativeshutdownsystempreviouslydiscussed.Theborationtoxenon-freeconditionscanbeachievedbyinjectionviatheCVCScross-tiefromtheunaffectedunit'sRWST.OtheralternativemeansofborationincludeuseoftheBITpathorinjectionfromtheboricacidsystemifavailable.ShrinkageoftheRCSwillprovidesufficientvolumereductiontoaccommodatethemakeupduringthisperiod.CooldownwillbeprovidedbycontinuedoperationofauxiliaryfeedwaterandmanualoperationofthesteamgeneratorPORVs.Atapproximatelyfivetosixhourspost-fire,ifpressurizerbackupheatershavebeenlost,ambientheatlossesfromthepressurizermaycauseadecreaseinsubcoolingmargin.ThismarginwillbemaintainedbyinitiatingRCScooldownorPage5-341 alternativelybyrepoweringthreebanksofpressurizerheatersinabackupheatergroupfromtheunaffectedunit.OthermanualsystemandvalvealignmentsmayoccurtoprovideadditionaloperationalflexibilityandtoprepareforinitiationofRHRoperation(hotshutdown).5.6.3HotShutdownInordertoachievehotshutdown,therepairprocedureforrepoweringoneRHRpumpfromtheunaffectedunitwillbeimplemented.Inaddition,manualrealignmentoftheunaffectedunit'sCCWandESWsystemswillbeperformedtoprovidecoolingwatertotheassociatedRHRheatexchanger.OtherminormanualvalvealignmentsintheRHRsystemwillalsobiperformed.TheSIaccumulatorswillbeisolated.TheRHRinletvalveswillbemanuallyopenedandtheRHRsystemwillbestarted.5.6.4ColdShutdownColdshutdownisachievedbycontinuedoperationoftheRHRsystemandtheotherrequiredsupportingsystemsthatwerepreviouslyinoperationduringhotshutdown.5.6.5AlternativeShutdowhSstemTechnicalSecificationsIndianaandMichiganElectricCompanyhasconductedareviewofthetechnicalspecificationsforDonaldC.CookNuclearPowerPlanttodeterminetheimpactonthesetechnicalspecificationsoftheproposedAppendixRAlternativeShutdownSystemDesign.Page5-35 BecausetheAlternativeShutdownSystemproposedbyIndianaandMichiganElectricCompanyforD.C.Cookrequirestheuseofvarioussafety-relatedsystemsintheunitunaffectedbythefiretoachievesafeshutdown,thisreviewfocusedonallthe,operatingmodesintheunitunaffectedbyhypothesizedfire.Basedonthisreview,theexistingtechnicalspecificationsforoperatingmodesl,2and3presentlyappearadequate.Thereviewdidindicatethatmodificationstothetechnical'ispecificationsarerequirednoperatingmodes4,5or6.whentheunaffectedunitisinThefollowinginformationoutlinesthegeneralapproachtobetakenbyIndianaandMichiganElectricCompanyinmodifyingthetechnicalspecificationsforeachofthealternativeshutdownsystemsthatwouldberequiredduringthesemodes.Thisformoftechnicalspecificationmodificationwillbeprovidedforthe'hemicalandVolumeControlSystem,EssentialServiceWaterSystem,ComponentCoolingWaterSystem,andtheMotor-DrivenAuxiliaryFeedwaterSystem.LimitinConditionfor0erationSufficientsystemequipmentmustbeavailabletopermitthesystemtobeoperableandcapableofsupportingthisunit'soperationintheexist.ingmode(4,5or6)andcapableofprovidingalternativeshutdowntotheoppositeunitwhilethatunitisinoperatingmode1,2or3.Page5-36 ACTION:Withinsufficientsystemequipmentavailabletomaintainthisunitinitsexistingoperatingmodeandsupportsafeshutdownintheoppositeunit,restoresuchminimumcapabilitywithin72hoursor:,(l)Establishadailyfireinspectionofthefollowingareasintheoppositeunitrequiringthealternativeshutdownsystem;000000000AuxiliaryBuilding-elev.587ftAuxiliaryBuilding-elev.609ftTransformerRoom-elev.59lftControlRoomSwitchgearRoomEngineeringSafetySystemandMCCRoomEPSEquipmentRoomsChargingPumpRoomESWPumpRoom(2)InitiallyverifybyinspectiontheOPERABILITYoffiredetection,automaticfiresuppressionandmanualfirefightingequipmentforthoseareasrequiringthisalternativeshutdownsystem.Ifminimumcapabilitycannotberestoredwithin30days,submittotheNRCareportoutliningthecauseoftheinoperableequipment,theactionstaken,andtheplansandschedulesforrestoringthesystemtooperablestatus.Page5-37

TABLE5-1ALTERNATIVESHUTDOWNMETHODS/FIREZONEMATRIXALTERNATIVESHUTDOWNMETHODFIREZONESMETHODAS1COMPLETEALTERNATIVESHUTDOWNMETHODAS2CHARGINGCROSSTIE8SUPPORTINGSYSTEMSONLYMETHODAS3ESSENTIALSERVICEWATERCROSSTIELSUPPORTONLYMETHODAS4LOCALPORVCONTROLONLYMETHODAS5Th$TcMONITORING(LSI-3)ONLY6N6S4344N44S1420535556575458596040A,B4142A,B,C,D47A,B4546A.C,D144145121121'2111122221122NOTESANDLEGEND:1Indicatesthealternativeshutdo'WnmethodisrequiredinUnit1.2IndicatesthealternativeshutdownmethodisrequiredinUnit2.1,2Indicatesthealternativeshutdownmethodisrequiredforbothunits.Page1of2

TABLE5-1(CONT.)ALTERNATIVESHUTDOWNMETHODS/FIREZONEMATRIXALTERNATIVESHUTDOWNMETHODFIREZONESMETHODAS1COMPLETEALTERNATIVESHUTDOWNMETHODAS2CHARGINGCROSSTIE8SUPPORTINGSYSTEMSONLYMETHODAS3ESSENTIALSERVICEWATERCROSSTIE8SUPPORTONLYMETHODAS4LOCALPORVCONTROLONLYMETHODASSTh8TcMONITORING(LSI-3)ONLY62A,B,C63A,B,C29A,B,E29C,D,F33,33A,33B36'34,34A,34B3952221,2NOTESANDLEGEND:1IndicatesthealternativeshutdownmethodisrequiredinUnit1.2IndicatesthealternativeshutdownmethodisrequiredinUnit2..1,2Indicatesthealternativeshutdownmethodisrequiredforbothunits.4Page2of2 p'i TABLE5-2NORMALSHUTDOWNEQUIPMENTAFFECTEDBYAFIREWHICHREQUIRESOPERATIONPOST-FIRETOSUPPORTMETHODAS1"COMPLETEALTERNATIVESHUTDOWN"FIREINFIREZONES14'0'3@54'5'6'7'8t5960'44'45'N~6SJ43I44Nt44St40Ag40B/41g42Ag42B,42C,42D,47A,47B,45,46A,46B,46C,46DSYSTEMCVCSAFW*MSRCS*EQUIPMENTNoneFMO-212FMO-242FMO-222FMO-232BLI-110BLI-140BLI-120BLI-130MRV-213MRV-243MRV-223,MRV-233NLI-151NPS-122NTR-110NTR-210NTR-120NTR-220NTR-130NTR-230NTR-140NTR-240PRESS.HTR***METHODOFOPERATIONNonormalshutdownequip-mentrequiredManualvalveoperationnearpanelLSI-1ManualvalveoperationnearpanelLSI-2Isolation&transferofindicationtopanelLSI-1Isolation&transferofindicationtopanelLSI-2ManualvalveoperationnearpanelLSI-1ManualvalveoperationnearpanelLSI-2Isolation&transferofindicationtoLSI-3RoutingofnewcableswillprovideindicationatLSI-4,LSI-5and6**RepoweringviarepairfromunaffectedunitPage1of2 TABLE5-2(cont.)OSYSTEMCCWEQUIPMENTCMO-410CMO-419CMO-420CMO-429METHODOFOPERATIONVerifyalignmentof1pairpriortoRHRinitiationESWWMO-705WMO-708WMO-707WMO-706Verifyalignmentof1pairpriortoRHRinitiationWMO-735WMO-737WMO-731WMO-733Verifyalignmentof1pairpriortoRHRinitiation(Unit1)EPSWMO-732WMO-734WMO-736WMO-738NonePP-35EPP-35WVerifyalignmentof1pairpriortoRHRinitiation(Unit2)Nonormalshutdownequip-mentrequiredRepoweringviarepairfromunaffectedunit.Inaddition,appropriatemanualvalvealignmentswillbeperformed.ForZones14and20lossofallacpowerwillnotaffectoperabilityofinstrumentationsystemsorturbine-drivenauxiliaryfeedwaterpumpduetoavailabilityofdcpowerforsometimeintervalpost-fire.**NotconsideredasnormalshutdownequipmentbutprovideslocalinformationfromthesameRTDsasnormalinstrumentchannels.**"Therepoweringanduseofasinglebackupgroupofpressurizerheatersisoptionalandnotrequiredforsafeshutdown.Thisrepoweringcapabilityisprovidedforoperationalflexibility.Page2of2 TABLE5-3NORMALSHUTDOWNEQUIPMENTAFFECTEDBYAFIREWHICHREQUIRESOPERATIONPOST-FIRETOSUPPORTMETHODAS2"CHARGINGCROSSTIEANDSUPPORTINGSYSTEMONLY"FIREINFIREZONES62{AgBgC)AND63(A~BJC)SYSTEMCVCSAFWMSRCSEQUIPMENTNoneNoneNoneNoneMETHODOFOPERATIONNonormalshutdownequip-mentrequiredNoequipmentorcableinthefirezoneUNoequipmentorcableinthefirezoneAtleastonepathfreeoffiredamageCCWESWNoneNoneNoequipmentorcablethefirezoneNoequipmentorcablethefirezonetinin!EPSRHRNoneNoneNoequipmentorcableinthefirezoneNoequipmentorcableinthefirezonePage1ofl

TABLE5-4NORMALSHUTDOWNEQUIPMENTAFFECTEDBYAFIREWHICHREQUIRESOPERATIONPOST-FIRETOSUPPORTMETHODAS3"ESSENTIALSERVICEWATERCROSSTIEANDSUPPORTONLY"FIREINFIREZONE29(AgB/E)AND29(CPDgF)SYSTEMCVCSEQUIPMENTNoneMETHODOFOPERATIONcablein~NoequipmentorthefirezoneAFWMSRCSCCWEPSESWRHRNoneNoneNoneNoneNoneNoneNoneNoequipmentorthefirezoneNoequipmentorthefirezoneNoequipmentorthefirezoneNoequipmentorthefirezoneNoequipmentorthefirezoneNoequipmentinzonerequiredNoequipmentorthefire'zonecableincableincableincableincableinthefirecableinPage1ofl TABLE5-5NORMALSHUTDOWNEQUIPMENTAFFECTEDBYAFIREWHICHREQUIRESOPERATIONPOST-FIRETOSUPPORTMETHODAS4"LOCALPORVCONTROLONLYNFIREINFIREZONES33AND34SYSTEMCVCSAFWMSRCSEQUIPMENTNoneNoneMRV-223MRV-233NoneMETHODOFOPERATIONAtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageManualoperationofSG-2&SG-3PORVnearpanelLSI-2AtleastonepathfreeoffiredamageCCWEPSESWRHRNoneNoneNoneNoneAtleastonefiredamageAtleastonefiredamageAtleastonefiredamageAtleastonefiredamagepathfreeofpathfreeofpathfreeofpathfreeofPage1of2 TABLE5-5(cont.)FIREZONE52SYSTEMCVCSAFWMSRCSCCWEPSESWRHREQUIPMENTNoneNoneMRV-213MRV-243ORMRV-223MRV-233NoneCMO-410CMO-420CMO-419CMO-429NoneNoneNoneMETHODOFOPERATIONAtleastonepathfreeoffiredamageAtleastonepathfreeof'iredamageManualoperationofPORVsnearLSI-1orLSI-2respectivelyAtleastonepathfreeoffiredamageManualalignmentofeithervalve-hotstandbyManualalignmentofeithervalvepriortoRHRinitiationBothpathsfreeoffiredamage(manualvalvealignmentsinothersystemsduetoassumedlossofAM-AandAM-D)Atleastone.pathfreeoffiredamageAtleastonepathfreeoffiredamagePage2of2 0

TABLE5-6INTENTIONALLYDELETED TABLE5-7NORMALSHUTDOWNEQUIPMENTAFFECTEDBYAFIREWHICHREQUIRESOPERATIONPOST-FIRETOSUPPORTMETHODAS4"LOCALPORVCONTROLONIY"8AS5"Th6TcMONITORINGONIY"FIREINFIREZONES38AND39SYSTEMCVCSAFWMSEQUIPMENTNoneNoneMRV-223MRV-233~orMRV-213MRV-243METHODOFOPERATIONAtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageLocalmanualcontrolofPORVsnearlocalpanelsLSI-1andLSI-2RCSNTR-110*NTR-120NTR-140RoutingofnewcablestoprovideremoteindicationofThandforallfourloopsLSI-4,LSI-5,S(LSI-6TcatCCWESWEPSNoneNoneNoneAtleastonepathfreeoffiredamageNoequipmentorcablesinthefirezoneAtleastonepathfreeoffiredamageRHRIMO-128**ManualIMO-128operationof*FireZone38only**FireZone39onlyPage1of2 TABLE5-7(cont)FIREINFIREZONES15AND18SYSTEMCVCSAFWMSEQUIPMENTNoneNoneMRV-213MRV-223MRV-233MRV-243METHODOFOPERATIONAtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamage'LocaloperationofsteamgeneratorPORVsnearpanelsLSI-1&LSI-2RCSNTR-140NTR-210NTR-240NTR-120NTR-130NTR-220NTR-230RoutingofnewcablestoprovideremoteindicationatLSI-4,LSI-5,&LSI-6forallfourloopsThandTcCCWESWEPSRHRNoneNoneNoneICM-129ICM-111AtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageAtleastonepathfreeoffiredamageManualoperationrequiredpriortoRHRinitiationPage2of2 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 TABLE5-9ESWSYSTEMSSSCABLESTOBEREMOVEDEQUIPMENTESWSE(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-taggedto.9967R-l.Page1of2 TABLE5-9(cont.)ESWSYSTEMSSSCABLESTOBEREMOVEDEQUIPMENTESWSW(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-taggedto8979R-2.Page2of2 STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONSOFOFF.-SITEPOWERREACTORPRO-TECTION'ANDCONTROLRODREACTORTRIPINSERTIONSWITCHGEARINITIALREACTIVITYCONTROLRWST*CENTRIFUGALCHARGINGPUMPS'1OF2)*RWSTNTRIFUGCHAPUOF2)BORATEDWATERSOURCEfunctionnotfree~offiredamagePUMPINGCAPACITYRCPUMPSEALORBIT~INJECTIONINJECTIONPATH~TE:THEBITINJECTIONPATHISOPTIONALANDNOTREQUIREDFQRSAFESHUTDOWN.SOURCE**RANGEMONITORINGINSTRUMENTATION'ONG-TERMREACTIVITYCONTROLNOTE:*IndfcstessystemsoroqWpmontfromthounituneffoctodhythoNro.ls*EqulpmontrepowersdfromunsNocledunit's~msrponcypowersystem.ALTERNATIVESHUTDOWNRCSREACTIVITYCONTROLFIGURE6.'t SAFESHUTDOWNFUNCTIONSSTATIONFIREPLUSLOSSOFOFF-SITEPOWER'WST"CENTRIFUGALCHARGINGPUMPS(1OF2)*RSWTCRIFUCHARPS(12)WATERSOURCEEFunctionnotfreeoffiredamagePUMPINGCAPACITYRCPUMPSEALORBITINJECTIONINJECTIONPATHNOTE:THEBITINJECTIONPATHISOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.CONTROLRCSLEAKAGERCSINVENTORYLOSSCONTROLPRESSURIZER**LEVELMONITORINGINSTRUMENTATIONREACTORCOOLANTMAKEUPCONTROLALTERNATIVESHUTDOWNRCSMAKEUPCONTROLFIGURE5.2NOTKt"Indicatessystemsoroqulpmsntfromthounitunattoctodbythofire.~'Equlpmontropowerod'romunattestedunlye'tomorttencypowersystem.

STATIONSAFESHUTDOWNFIREPLUSLOSSFUNCTIONSOFOFF.SITEPOWERPRESSURIZERSAFETYVALVESOVERPRESSUREPROTECTIONHI.LOPRESSUREINTERFACEISOLATIONDEPRESSURIZATIONPROTECTIONAUXILIARYSPRAYLINEISOLATIONPRESSURIZERHEATERSSUBCOOLINGMARGINCONTROLNOTE:THEPRESSURIZERHEATERSAREOPTIONALANDNOTREQUIREDFORSAFESHUTDOWN.RCSPRESSUREMONITORINGINSTRUMENTATIONRCSTrrMONITORINGINITIALRCSPRESSURECONTROLRHRSAFETYVALVESOVERPRESSUREPROTECTIONLONG-TERMPRESSURECONTROLALTERNATIVESHUTDOWNRCSPRESSURECONTROLFIGURE5.3frOTKt~Indicatessystemsorequipmentfromthounitunaffectedbytheffre.~'t!qulpmontropoworodfromunaffectedunit'o~morponcypowersystem.

SAFESHUTDONNFUNCTIONS.STATIONFIREPLUSLOSSOFOFF-SITEPOWERSTEAMGENERATORS(2OF4)HEATTRANSFERPATHSTEAMGENERATORSAFETYVALVEANDPORVHEATRELEASEPATHRCSTHANDTc'ONITORINGNATURALCIRCULATIONSTEAMGENERATORPRESSUREANDLEVELMONITORINGSTEAMGENERATORINSTRUMENTATIONCONDENSATE*STORAGETANKWITHESSENTIALSERVICEWATERBACKUPCONDENSATESTORAGETANKWITHESSENTIALSERVICEWATERBACKUPSECONDARYWATERSOURCEffOTE:ALTERNATIVESHUTDOWNREACTORHEATREMOVALFIGURE5.4~Indlcstessystemsoroqulpmontfromthounitunsfloctodbythoflm."Equtpmontropoworedfromunaffectedunit'~mergencypowersystem.

0SAFESHUTDOWNFUNCTIONSFunctionnotfreeoffiredamageAUXILIARY*FEEDWATER(1OF2)ILIARFEEDTERF3)PUMPINGCAPACITY-STEAMGENERATORINLETMOV'sINJECTIONPATH~INITIALREACTORHEATREMOVALRHR**(1OF2)LONG-TERMHEATREMOVALNOTtlt~Indicatessy¹omsorequipmentfromthounitunaffectedbythefire."Equipmantropoworodfromunaffectedunit's~mordancypowersystem.ALTERNATIVESHUTDOWNREACTORHEATREMOVALFIGURE5.4(CONT)

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tE=4

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T06OOVACB1181T0600VACB2181I~.10OA~MCC1-ABD-B(EXlSTlNGj600Y/12%08MCC2-ABD-B(EXlSTING)50kVATRANSFORMERSVVEMERGENCYSHUTDOWNANDCOOLDOWN(EXISTING)ACDlST,CABI-ELSCACDISTCAB2-ELSCEXISTINGDISTRIBUTIONCABINETS(EXISTING)PROPOSEDPOWERSOURCEEXISTINGPOWERSOURCESUBPNL2-LS$-4LSUBPNL2-LSI-6SUBPNL2-LSI-~SUBPNL2-LSI-INOTE'OWERSELECTORSWITCHESTOBEPROVIDEDATPANELS2LSI-4,2LSI-5XX,AND2LSI-6XXSUBPNL2-LSI-eSUBPNL2-LSI-2ONELINEDIAGRAMFORPROPOSEDPOWERSOURCESTOUNIT2LSI.PANELSFIGURE5.12.2 LSIPANELPONER.SUPPLYSCHEMATIC(TYPICAL)FIGURE6.1343l'-BLIQMI5NTSQOCÃED)INST.BVSr43X-SLI-ooc43-BLXINST.BUSZ43-I43.2BLI(OII)EXlSTlNGCKT,PROPOSEDCKT.LALHUTDOWNINDICAIONPOWERCKT

()TSOattOC.IfttI'Te*latg)ISOLATIONRELAYLOCATEDINSWITCHGEARI-)~aveItvtfILtavgveaLttse(-)TOe4es44esLSITaCTASI9b+IST)1g)ttvtf0~eA&~PCS<45lOtfSASafLISISffttOQL45e~AILftttIS))p~'t)~CABLEANDASSOCIATEDCONTACTREQUIRINGCIRCUITISOLATION'1SISf~gf0ttat)In0af0I~ec<<e(ISaafI)RPS-8.LdttRPS-.sSLPLSTSL~)49LLSITCT4tISQAUIIITIdRPSACSTOttSLSISVSSL'RLSt9L99dlSIS-f4'ft)W)tTS'aSCT'dgg,EXISTINGCKT.PROPOSEDCKT.ESSENTIALSERVICEWATERPUMPCONTROLCIRCUITUNIT2PUMPCIRCUITSHOWN(TYPICALFORALLESWPUMPS)FIGURE5.14.1 IH05TOII>atlCltPRESSURESWITCHANDCABLEREQUIRINGISOLATIONC+CIIOITOIO7(C.A)IKSH>fII~l(IIOtvI)=tolTOIOtl(CA)Ctl4StCSII>5I(IIOlt.N))IOITOO'tl(C)tOITOO(C)ISOLATIONRELAYLOCATEDINSWITCHGEARoSCIIOI~DO7(CA)AS~I=SII'5l6(Idyll>)tOITOIO(C*)AQIT.SNIT(ISCA,)IclTOOtl'OC(C).(C)TRANSFERSWITCHANDASSOCIATEDtCABLETOBEDELETEDFROMUNITpIHSDPANEL~ltLKJ4IfSNIQ(ISOI.)CSH'ICIII(ISOI.j)~CONTROLSWITCHINUNIT2'ol)TOBERELOCATEDTOUNITIHSDPANELCIII5JSI5SI4lf.IO(ISOL,)l5ISHI5(~a)ICIICITOOIATOO(C,A)(AA,AT)tieTOOuT5ic(C,A)(AA,AT)55A+tSOVOCCOXTXO.SIIS05A+t50vOC~TZOI.SOSAOTjtf%'f$$0C'E5A'lel50(FEWIS~Fpg44W.Rhtl5EXISTINGCKT.PROPOSE0CKT.ESSENTIALSERVICEWATERPUMPCKT.BREAKERCLOSECIRCUITUNIT1ESWPUMPCIRCUITSHOWN(TYPICALFORALLESWPUMPS)FIGURE5.14.,2

ISbt52TOIOAIII.5H.52TbtOIOAIOITOIOOtIT)IIIllESMIEI<<~.g)I1tTOILT)IIJL2oIITbt0(T,AT)Qf(ACT,'T)A'SIESMIEgoeÃM)IsNoIET)ILIIAlSOt.)IStOITbtO(T,AT)~0TO8pCT,T)4S2IESMIEI~~M)OAttt9Wi)tCONTROLSWITCHINUNIT2TOBERELOCATEDTOUNIT1HSDPANELIOI'TOIO(I.OCtl,OuT)9AS.ICOMIE.gmgM)IOITOtO(T)62OI<I.Ce,aOtIT)9ASIERIE(ISOATE)TOITbibET)2OITOtOLT)e2>QtIOCCOtIT2Ot.bIISTRANSFERSWITCHANDASSOCIATEDCABLETOBEREPAOVEDFROMUNIT2HSDPANEL+2SOWOCCOIITCIOtbQSEXISTINGCKT.PROPOSEDCKT.ESSENTIALSERVICEWATERPUMPCKT.BREAKERTRIPCIRCUITUNIT1ESWPUMPCIRCUITSHOWN(TYPICALFORALLESWPUMPS)FIGURE5.14.3 CABLETOBEISOLATEDATSWITCHGEARCABLESANDSWITCHESTOBEREMOVEDANDRELOCATEDI920SI.92OSOINCO'BOZOH/I-92ooypfoei~oÃz-ezoovI2-9zoIoPHh')p4'aP8'h'SIh'Il/E'SW'h4/PSN+54/UA/$2PgAIESA/UjVgg~78A+SMuNg/7cCC'zkCe)IZ-92IchB.PPS-BIIVik//-9848/CRB.6'5-gUH'./LOG.c88fpg/JIK/y/g8/606I84$IG'-If45'9v]'~qCSSS-I9msaic'-/PPhi//S2piPRIVAS~2Iyvjl~ggo/0II!Lere.(rlIIIIsr(s7C'fB'aHg0k'I/a<8n/2/o87f9G-ICeo')PIIIhf~GbIQh/P570/92DE4IS'///IoI4S'OI+CABLETOBEISOLATEDATSWITCHGEARI/0EBB.0792Sg9NOTE:VARIOUSCABLESSHOWNAREINNON-SSSCIRCUITSESWPUMPSCHEMATIC(TYPICAL)FIGURE5.45 k

7,9zo/oconf,4r)Pi//t/~st(Alar.fa)/-Po/Otwo./r)P//hfEsMiUuzÃg/)/.98009pwESh/da'.g/)~CONTROLSWITCHESIpa~RELOCATEDAND!UPi742)CABLEREROUTEDJTOPANELHSDIII1-92oo9to0/-97/0elwlIl(-9zoS]ng.c.c/PS-J/ass)IIJgee8C'8red/oI%m07BGP,",80II,0019524/hfNo78/ESWPUMPDISCHARGEVALVESCHEMATIC(TYPICAL)FIGURE5.1BNOTE:VARIOUSCABLESSHOWNARE~INNON"SSSCIRCUITS CABLESTOBEDELETEDANDCONTROLSWITCHESRELOCATEOTOHSD1/92oo9KH~D54/I/N/74'//2ek)~cj&gICOIIIMCCGRI-92//8I/2/c/coo9P8'P/HS~Un//7'.92I/-92oa6PR'/VssP7PNH59/RawLOPCgEcoG.cg~*C'-997/c7'hl4&c.c/Ps-zl~ss>P-92/ZZ2-92/~27@/CCS/0+8"/4I-95>sg+7.SaxQ0C5QcuWw4QWD570/4/J870/I0ICgI-es///AI7.B'oAS7-Z/Z~5olgt5<a'6-r1Q4qIEOh/-9S///g/cfaoz)4@VV76/ScC,vzv766SacSTR/E/~5TEEDOut77<SOL~~v77/Soihay'6'/L.SWhfgY766Z.SMWAI776'.$4/MPv77/L.SwESWPUMPSTRAINERSCHEMATIC{TYPICAL)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-TIEVALVE(TYPICAL)FIGURE5.18 SIIICLEELEMENTATDaITTP,)NTA'110TERIOTLEO)(UnitI)411AINSIDECONTAINMENTOUTSIDECotlTAltIMINTNTA110TEgOLDLEG)(Unit2)4118INSOECOIITAIIIMENTOUTSIDECotITAIIIMEttTPOWERSOURCEPOWEASOURCELSI.5XNTR'IIOB))TRLSI.5TOCONTROLAOOMZLooPIII/I)INTRIIOAPOWERSOURCEPOWERSOURCELSI.5XX1108NTRgtLSI5XXIIIIILSI5XXNTR21+LSI-SXLSISXLSI.SXLSI-5XXLSI.SXXIIITOCONTAOLLooPILy4)TEMP.IIIOICATORTEMP,INDICATORPOWERSOURCETEMP,Itrt>>CATPRTEMP.INDICATORtOWERSOURCELSI4LSI.5LSISXLSI4LSI5LSI-SXXPROPOSEDTHANDTcLOCALINSTRUMENTATION(LOOP1SHOWN-LOOPS2,3AND4SIMILAR)LT501BLI~I'10INSIDECONTAINMENT'l)TSIOECONTAIIIMEtlTIAEMOTEILOCALBLI110LSI.)LSI~I41141XBLI110LSI~IIIIIIIIf.XTENSIONOFINOICATONToLSI4PROPOSEDToCONTAOLROOMANONSPIPANELltlOICATlotlPOWERSUPPLY~LSI~IeuI'IOLSI4EXISTINGWIDE-RANGESTEAM'ENERATORLEVELLOCALINSTRUMENTATION(LOOP1SHOWN-LOOPS2,3AND4SIMILAR)FIGURE6.19.1LSIINSTRUMFNTATION LOOPI213POWERSUPPLYLQ.4MPI213LSI.5213Ldl4PROPOSEDSTEAMGENERATORPRESSURELOCALINSTRUMENTATION.(LOOP1SHOWN-LOOPS2,3,AND4SIMILAR)EXISTINGPRESSURIZERLEVELLOCALINSTRUMENTATIONLT%1.141442IOUTQOECONTAINMENTI43143XHLIHLI141LSH31411ITOCOHTROLROOMIHOCATNN'141FIGURE5.19.2LSIINSTRUMENTATION PT405NPS~122INSIDECONTAINMENTOUTSIOECONTAINMENTREMOTEILOCALQ431NPS12243K,NPS122LSI.3IIPOWERSUPPLYLQ.3TOCONTROLROOMRECORDERPR403ANOOTHERINTERLOCKSLQ3EXISTINGREACTORCOOLANTWIDERANGEPRESSURELOCALINSTRUMENTATIONFIGURE5.19.3LSIINSTRUMENTATION 80CjNOTES:X~SPAREWflLPPOWERRANGESIEXISTINGSOURCE/WTERMEDIATERANGESi-PROPOSE0SOVRCflWTERMEDIATERANGECORE88BYMANUFACTURERJ.BOXNOTE:THISFIGUREISSHOWNFORUNIT1.UNIT2ISSIMILARWSIDEOUTSIDECONTAWMENTCONTAWMENTCONTROLROOMUNIT2UNIT1POWERANDSIGNALCABLESCRIDIIIUNIT2POWERREMOTEAMPLIFIfRANDISOLATORISOLATEDREMOTESIGNALPROCESSWQDISPLAYCASWFTSIGNALCABLESCONTROLROOMPROCESSORISOlATEDSIGNALCABLEISOLATEDSIGNALSJTOLOCALCABWETLSI.iISOLATfDSIGNAL~TOCONTROLROOMDISPLAYCONTROLROOMUNIT1CRIDIIIUNIT1POWERPROPOSEDUNIT1SRMINSTRUMENTATIONFIGURE5.20

QFl-QOO0/I.3ot8/ZI-/5/I+NP5/22IiIICHARGIAfGPLOWLErDOW4fPRESSURIZERFLOWLEYE<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'LSI-3(VIVID2JtanoHreowcANoLavoovwaowmvasaumosssEXISTINGLOCALSHUTDOWNIND.CABINETSFIGURE5.21.1

c98BLI110ON1LQIANO2LSI.ISLI.120ONILQ.2ANO2LSI2/ND/AlQ.IIIIIIBLI140ONILSIIANO2LQISU.130ONILQ.2ANO2LQ2RFMO?XLd&/SW'//MESPOWERS'7R/DooRPOWERSuPPLYP-diOOOUMIS7RUTPoeERSUPPLYNOTE:NTFSFORThANDTcTOBEADDEDASPROPOSEDMODIFICATIONSIsL/"x///4"wv'Ra/IIIiCABIVE7S/lSI-//!SI-2(LlVI7/)CABIAIFTS2LSI-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)UNIT2SIMILARTOBELOCATEDINFIREZONE26ALTERNATEPOWERSOURCEFORUNIT1PRESSURIZERHEATERSFIGURE5.22

'6.REPAIRSANDCOLDSHUTDOWNOPERABILITY6.1IntroductionAppendixRSectionIII.G.l('a)statesthat:"onetrainofsystemsnecessarytoachieveandmaintainhotshutdownconditionsfromeitherControlRoomoremergencycontrolstation(s)is,freeoffiredamage..."IISectionIII.G.l(b)states:"systemsnecessarytoachieveandmaintaincoldshutdownfromeithertheControlRoomoremergencycontrolstation(s)canberepairedwithin72hours.".SectionIII.L.lstatesthat:"alternativeordedicatedshutdown,capabilityprovidedforaspecificfireareqshallbeableto...achieveandmaintainhotstandbyconditionsforaPWRandachievecoldshutdownconditionswithin72hoursandmaintaincoldshutdownconditionsthereafter."SectionIII.L.5states:"equipmentandsystemscomprisingthemeanstoachieveandmaintaincoldshutdownconditionsahalinohbedamagedbyfire~'orthefiredamagetosuchequipmentandsystemsshallbelimitedsothatthesystemscanbemadeoperableandcoldshutdownachievedwithin72hours."TheD.C.CookTechnicalSpecificationsdefinetheseapplicableplantmodesasfollows:HotStandby(Mode3)-Theinitialsafeshutdownstatewiththereactoratzeropower,kefflessthan0.99andRCSaveragetemperature.greaterthanorequalto350F.tJPage6-1 HotShutdown(Mode4)Reactoratzel0powerkefflessthan0.99andRCStemperaturebetween350Fand200oF.ColdShutdown{Mode5):lReactoratzeropower,kefflessthan0.99andRCStemperatureatorbelow200F.Basedonthesedefinitions,bothhotandcoldshutdownareRCScooldovnstatesthatoccurasaresultofreactorheatremovalviatheRHRsystem.ThesystemsrequiredforinitiationandmaintenanceofRCSheatremovalarethereforeidenticalforboththehotandcoldshutdownregions.RepairofsystemsorequipmentrequiredtoachievecoldshutdownmustbeaccomplishedpriortoinitiationoftheRHRsystemandentryintohotshutdownconditions(asdefinedbythetechnicalspecifications).ForallfirezonesatD.C.Cook,withtheexceptionofthoserequiringcompletealternativeshutdown,coldshutdownconditionscanbeachievedwithin72hoursofafirevithoutrequiringanyrepairactivities.Forthosezonesrequiringcompletealternativeshutdovn,onerepairactivity{i.e.,repoweringofanRHRpump)isrequiredandasecondactivity(i.e.,repoveringofpressurizerheaters)flexibility.Theseare:isproposedtoprovideoperational(1)RepoveringofoneRHRpumpEPS,andfromtheunaffectedunit.'s(2)Repoweringofthreebanksofpressurizerheatersfromtheunaffectedunit'sEPS.Abankofheatersconsistsofthreeheaterelementsconnectedinadeltaconfiguration.Page6-2 Neitherrepairisrequiredtoachieveinitialhotstandbyconditionsafterafire.ItisIndianaandMichigan'sCIinterpretationo'ftheprovisionsofAppendixRthatrepairsarenotpermittedtoachieveinitialhotstandbyconditions.Suchrepairsarepermittedduringcooldowninthehotstandbymodetoultimatelyachievecoldshutdownconditionswithinthe72-hourtime-framepermittedbyAppendixR.Should.IndianaandMichigan'sinterpretationoftherepairprovisionsofSectionsIII.G.1(b),III.L.land'II.L.5beincorrect,thenIndianaandMichiganformallyrequestsanexemptionfromtheseprovisionsofAppendixRwithrespecttothetworepairactivitiesrequiredtoachieveRHRoperation(hotandcold'hutdown)foralternativeshutdownmethodAS1.Section6.2providesadescriptionoftherepair'activitiesthatwillbeperformedandprovidesthebasisfortheabove-statedexemptionrequest,shoulditberequired.6.2PressurizerHeaters6.2.1ReowerinofPressurizerHeatersPressurizerheatershavebeenincludedaspartofsafeprovideonemethodofmaintainingIsufficientreactorcoolantsystempressure.Adequatemaintenanceshutdownequipment,sincetheyofRCSpressureensuresthattheprimarycoolantissubcooledandcorecoolingvianaturalcirculationismaintained.InresponsetovariousTMIissues,astudywasperformedtodeterminetheheatercapacityrequiredtomaintainRCSpressurePage6-3 withanassumedlossofoff-sitepower.Afteraninitialheatlossfromthepressurizerduetoadecreaseinpressurizerlevel,Tsatwilldecreaseatapproximately7Fconservativelyassumedambientheatlosses.per'hourduetoWiththisassumeddecreaseinsaturationtemperatureinthepressurizer,lossofadequatesubcoolingcouldoccur,fivetosixhourslater.Heaterinput'atanytimepriortothisperiodwouldmorethanoffsettheheatlossesassumedandallowsystempressuretobestabilizedatanydesiredvalue..Sincethestudyassumedthatdecayheatwasremovedbythesteamgeneratorsafety.valves,thehighestreactorcoolantsystemtemperatureandleastmargintosubcoolingwasassumed.Basedonthisandsubsequentanalysis,adequatesubcoolingmargincanbemaintainedwithinthereactorcoolantsystemwithamarginofgreaterthanfourhours,assumingnocooldown(useofsteamgeneratorPORVs).ShouldcooldownoftheReactorCoolantSystembeinitiatedpriortothistime,anadequatesubcoolingmarginwillbemaintainedwithoutpressurizerheatersforasubstantiallylongertimeframe.Thesafeshutdownsystemsavailableforallfirezones,includingthoserequiringalternativeshutdown,providetheIcapabilitytocooldowntheReactorCoolantSystemduringhotstandbyatarateof25Fperhour.Thiscooldownisbynaturalcirculationwithaflowpathachievedthroughthecoreandtheindividualloops.However,waterintheupperareaofthereactorvesselremainsstagnateandhot.ThecooldownofthisPage6-4' areaofthesystemismostlybyheatradiationandconvectiontoIUthecontainment.Whilethecirculatingsectionofthesystemcanbecooledmuch',faster,thewaterinthevesselheadlikethatinthepressurizer,'illbeassumedtocoolattherateof7Fperhourandsystemdepressurizationwillbecontrolledtomaintaina50Fsubcoolingmarginabovethisvalue.Shouldtheheaterbeunavailable,cooldownoftheloopswillproceedatarateequaltoorinexcessof10Fperhour.Withthesecooldownrates,thepressurizerwillcooldownanddepressurizefrom2235psig(8635F)to435psig(8456F)tnayez'Ladof3Qhouri<andth>>loopswillbecooledtoapproximately300F,atwhichpointtheRHRsystemcanbeplacedinservice.Assumingcooldownwasinitiatedatfourhourspost-fire,morethan36hoursareavailabletoinitiateothersystemrealignmentsandrepoweringofoneRHRpumptopermitentryintoRHRcoolingmode.HotshutdownRHRentryconditionscouldthereforebeachieved'ithoutpressurizerheaters.Theconclusioncanbedrawn,basedontheabovediscussion,forsafeshutdown.thatpressurizerheatersarenotrequiredIndianaandMichiganhasnotincludedtheheatersin'.itssafeproposedto'nitiateshutdownequipmentlistingbuthasmodificationstoprovideforrepoweringoftheheatersinordertoprovideoperationalflexibilitytotheD.C.Cookoperatingstaff,shouldsuchpostulatedfiresoccur.Inaddition,theseactivitieswillprovidethecapabilitytomaintaincontrolledhotstandbyconditionsforextendedperiodsoftime,should.theneed1arise.Page6-5 6.2.2ProceduresandMaterialforPressurizerHeaterReowerinAsdiscussedin'ection5.5.10,a480VMCCwillbepermanentlyinst.+liedinthefire-affectedunitforthisrepairactivity.ThisMCCwillbepoweredfroma480Vswitchgearcircuitbreakerlocatedintheunaffectedunit.Sinceaminimumheaterpowerof150KWissufficientforcooldownactivities,threesetsofpowercableswithprefabricatedterminationswillbestoredattheMCC.Intheeventofafire,thesepowercableswillberoutedfromtheMCCtotheelectr;icalpenetrationsforrepoweringofthreebanksofpressurizerheaters(onebankofheatersconsistsofthreeheaterelements.connectedinadeltaconfiguration).Eachofthethreeheaterbanksprovidesapproximately70KWofheat.Thus,repoweringofanythreeheatercircuits(orbanks)fromanyofthebackupheatergroupswillsatisfytheabove150KWrequirement.Inaddition,thetoolsandproceduresnecessarytodisconnecttheexistingcablingandcompletethesplicetotherepairpowercablingwillbepermanentlylocatedonsite.Thegeneralprocedureforrepoweringtheheaterswillbeasfollows:0IVerifythattheunitbackupheatergroup'snormaland!alternatepowersourcesaredeenergized;Disconnecttheheatergrouppowercablingatthecontainmentelectricalpenetration;Page6-6 0Routethenewpowercablesfromthealternatesourcemotorcontrolcenter(intheaffectedunit)totheelectricalpenetrationarea;Termi'natetherepairpowercabletothecontainmentpenet'rationinthefire-affectedunit;oVerifyappropriateterminationsandnotifyoperationsthatheatersareavailableforuse;andoEnergizetheheatersasrequired.6e3ReowerinofRHRPumsForthosefirezonesrequiringthecompletealternativeshutdownmethod,repoweringofoneofthefire-affectedunit'sRHRpumpfromtheunaffectedunitisrequired..Rorthesefirezones,lossofpermanentpowerand/orcontroltotheRHRpumps4kVbreakercontrolcouldoccurduetolossofthepumps'ircuitsorlossofthesupportingEPSpowergenerationanddistributionsystemcablesorequipment.Ratherthanattemptthesubstantialrepairactivitiesassociatedwithre-establishingpowertooneoftheaffectedunit'sRHRpumps,?&Mhasproposedtorepowerthepumpusingtheexistingdistributionequipmentandcablingwhichprovidespowertooneoftheunaffectedunit'sRHRorCTSpumps.Singlefailuresorotherplant,transientconditionsneednotbeassumedinmeetingtherequirementsofAppendixR;therefore,bothresidualheatremovalandcontainmentspraytrainsandequipmentintheunaffectedunitcanbeassumedavailable.Thus,lossofpowertooneresidualheatremovalpumporcontainmentspraypumpintheunaffectedunitwillnotimpacttheabilityofthatunit.tomaintainstableplantoperatingconditions.Page6-7 Aspreviouslydiscussed,thesafeshutdownsystem'scooldowncapabilityprovidesatimeframeofatleast32hourspost-f.irewithinwhichtheRHRpumprepoweringrepairsmaybe'ccomplished.Thistimeframe'iswellinexcessofthatnecessarytoensureproperrepairactivities.6.3.1ProceduresandMaterialsforReowerinofRHRPumShouldrepoweringofoneRHRpumpfromtheunaffectedunit'sdpowersourcesberequired,thetemporarypowermaybeobtainedfromoneoftheunaffectedunit'sRHRorCTSpumps,orfromanunaffectedunit4.16kVbreakerasappropriate.TheIhOandcorporateengineeringsupportteamswillselectionofthealternativesource.materials,toolsandprocedureswillbestoredon-site.Thegeneralprocedureforrepoweringonepumpisasfollows:o'erifythattheapplicablepowersourcesaredeenergizedinbothunits;oDisconnectthepowercablingatbothsources;0000Routetherepairpowercablingbetweentheapplicablepumpandsourcelocations;Splicetherepairpowercabletotheunaffectedunit'spowercable;Meggerandhi-pottesttherepairedcable;Terminatetherepairedcabletotheaffectedunit'sRHRpumpmotor;Verifyproperterminations,checkforpropermotorrotationandnotifyoperations;AligntheappropriateRHRsystemvalves;andClosetheassociated4kVbreakerfromtheControlRoomoftheunaffectedunit.Page6-8 6.4Conclusions~+InaccordancewiththeprovisionsofAppendixR,Indianaandl<rMichiganhasdemonstrated.theabilityofachievingcoldshutdownconditionsforallfiresassumedatD.C.Cookwithinthe72-hou'rtime-framepermittedbytherule.IndianaandMichiganIrecognizesthattheprovisionsofAppendixRdonotrequireplantoperatingpersonneltoattaincoldshutdownconditionsofthefire-affectedunitwithin72hoursshouldafireoccuratD.C.,Cook.However,operatingprocedures,repairproceduresandmodificationswillbeprovidedthatpermitthecapabilityofachievingcoldshutdownwithi'nthetimeperiod.ProceduresalsoEwillbestructuredtoprovidetheoperatingstaffwiththenecessaryflexibilitytodeterminetheappropriatepost-fireactivitiesand.plant,conditionsthatwillmaintainD.C.Cookin,themoststablesafeshutdownstatepossible.Page6-9 4a 7.EXEMPTIONREQUESTSANDANALYSES7.1IntroductionAsafeshutdownanalysishasbeencompletedfortheD.C.CookNuclearPlantinthefireareasdesignatedinTablel-lofthisreport.Asaresultofthatanalysis,llareaswereidentifiedinMarch1983thatrequireexemptionsfromthespecificrequirementsofAppendixR,SectionIII.G.EightoftheelevenexemptionsarefromSectionIII.G.3andtheremainingthreearefromSectionIII.G.2.TwoadditionaltechnicalexemptionswererequestedinJune1984.Theseexemptioninclude(1)ventilationductpenetrationsintheAuxiliaryBuildingnotsuppliedwithfiredampers,and(2)seismicgapsbetweentheContainmentandAuxiliaryBuildings.Thissectiondocumentsthesafeshutdownsystemsandfirehazardsanalysesperformedonthese13areasandprovidesthebasesbywhichtheexemptionrequestsare.justified.Asaresultoftheproposedalternativeshutdowncapability,eightareasrequireexemptionsfromSectionIII.G.3,inthatafixedsuppressionsystemisnotinstal'ledinthearea.Theyareidentifiedasfollows:(1)TheUnit1andUnit2TransformerRooms(FireZones14.and20)locatedintheAuxiliaryBuilding(2)TheUnit1andUnit2ESWPumpRooms(FireZones29A,29B,29Eand29C,29D,29F)locatedintheScreenhqusePage7-1 (3)TheUnit1andUnit2mainsteamlineandvalveenclosures(FireZones33,33A,33B,105and34,34A,34B)locatedintheoutsidecontainmentannulusarea(4)TheUnit1andUnit2MainControlRooms(FireZones53and54)locatedintheAuxiliaryBuilding.ThethreeexemptionsrequestedfromSectionII'I.G.2arefortheRHR/CTSpumparea(FireZones1,1Athrough1H,136,137,(138A,138Band138C)theESWpumpbasement(FireZone29G),andthesouthendofelevation609ftoftheAuxiliaryBuilding(FireZone44S).SubsequenttotheMarch1983submittal,theimplementationofproposedmodificationswascommenced.Duringthisperiod,variousproposedfireprotectionmodificationseithercouldnotbephysicallyimplementedorwouldnotachievetheintendedlevelosprotectionorconformance.Reviewsofthefireareaboundarieswereperformedandadditionalunprotectedorunsealedopenings,ductsordoorswereidentified.Engineeringrevaluationswereperformedtoresolve.theabovementionedissuesandassuch,additional'modificationswereproposedand/orjustificationswereprovidedfortheunsealedorunprotectedopenings,ducts,doorsorhatches.Theeng'ineeringevaluationsthatwereperformedtowithdrawtheproposedmodificationsmentionedintheexemptionrequestshaveanalyzedtheimpactonredundantsafeshutdowncapabilityorthebasisfortheexemptionrequest.Dur'ingthisper'i:od,twoadditionaltechnicalexemptionswerealsorequested.TheseexemptionsarepresentedinSubsections7.13and7.14.Page7-2 Eightexemptionrequests(Subsections7.13through7.20),submittedinMarch1983,werenolongerrequired;assuch,thoseexemptionrequestswerewithdrawn.Subsections7.13through7.20oftheMarch1983submittalwererequestsforexemptionsfromthefixedsuppressionsystemrequirementsofSectionIII.G.3forFireZones66,67,74,75,120,121,122,and123.BasedonfurtherdiscussionwiththeNRCStaffandtheirclarificationsoftheIII.G.2andIII.G.3provisions,IndianaandMichiganElectricCompanyhasformallywithdrawntheexemptionrequestsforthesefirezones.It.is,.IndianaandMichiganElectricCompany'spresentunderstandingthatthefirehazardsanalysispreviouslyconductedandmodificationsproposed(with,the,exceptionofthe.edetection.system)will.achieve,compliance,~withthefireprotectionprovisions,ofAppendix,R*SectionIII.G.2(d),-and(f)forthesefirezones..'"Theproposed'odificationtoinstallautomaticdetectionsystemstdetectionisnotrequired,tois.thereforewithdrawnsinceachieveadequatefireprotectioncompliancewiththeprovisionsofSectionIII.G.2(d)or(f).Section9ofthisreportpresentstheengineeringevaluationsperformedsinceMarch1983.Theexemptionrequestswerereviewedfortextchangesthatwererequiredasaresultoftheevaluations.Theevaluationsdemonstratethatthereisnoimpactoneitherredundantsafeshutdowncapabilityorthebasesandconclusionsoftheaffectedexemption.Inaddition,someeditorialchangeswerealsomadetoprovidefurtherclarificationfortheexemptionrequest.Page7-3 TheexemptionsrequestedinSubsections7.2through7.12arebasedontheconditionsand"configurationsofD.C.CookasofMarch1983.TheexemptionsrequestedinSubsections7.13and714basedontheconditionsandconfigurationsofD.C.CookasofJune1984.,Insomeinstances,evaluationswereperformedtojustifynot,implementingmodifications.Theseevaluationsarepresentedin'Section9ofthis.reportandarebasedontheconfigurationoftheD.C.Cookplantattheendofthe1986Unit2refuelingoutage.Inaddition,duetoongoingeffortstocomplywith10CFR,50AppendixRandsubsequent".generic,NRC"clarifications,variousmodificationsinconjunctionwiththeperformanceofengineeringevaluationshaveresultedinrevisionstovariousrequestedexemptions."*Theserevisionsarebasedon4theexisting,configurationofthe".D.C.Cookplant-atthe'endofthe1986Unit.2refuelingoutage.TherequestedexemptionsinSubsections7.2through7.12weresubmittedin1983andtherequestedexemptionsinSubsections7.13and7.14weresubmittedin1984.TheseexemptionshavebeenreviewedbyNRCStaff,andSERswereissuedapprovingtheconfigurationandseparationofthesafeshutdownsystemsin:thefirezones,ofconcern,aswellastheadequacyoffireprotectionfeatures.Additionalfireprotectionmodificationsareproposedtoprovideaddedassurancethatatleastonetrainofredundantsafeshutdownequipmentremainsfreeoffiredamage.Inparticular,Page7-4 eextensivefireprotectionmodificationsarebeingproposedintheControlRoomsandintheareaofthecomponentcoolingwaterpumps.Thefollowingsectionsprovidethedetailsofthesafeshutdownsystemsandfireprotectionanalysesperformed;thesesectionsalsodemonstratethatstrictcompliancewithSectionIII.G.ofAppendix.-Rwouldnotenhancefire.protectionsafetyabovethatwhichisprovidedbytheproposedcommitments.Thefollowingexemptionrequestsare.containedinthissection:Subsection7.27.3DescritionAutomatic.suppressionexemptionrequestforFireZones1,lAthroughlH,136,137,138Athrough138C,RHR/CTSpumparea,AuxiliaryBuilding,el:573ft,Fixedsuppressionexemptionrequestfor.,FireArea14,TransformerRoom,el591ft,Unit1Pacae7.4FixedsuppressionexemptionrequestforFireArea20,TransformerRoom,el591ft,Unit27-247.57.6FixedsuppressionexemptionrequestforFireZones29A,B,E,Unit1ESWpumpsandMCCs'ixedsuppressionexemption'equestforFireZones29C,D,F,Unit2ESWpumpsandMCCsAutomaticsuppressionexemptionrequestforFireZone29G,ScreenhouseAuxiliaryMCCRoom,el575ft,bothunits7-297-367-43Page7-5 7.87.9FixedsuppressionexemptionFireZones33,33A,33B,and105,Unit1EastMainSteamValveEnclosureandContractorAccessControlBuildingFikedsuppressionexemptionFireZones34,34A,.34B,Unit2EastMainSteamValveEnclosure7-527-587.10One-hour-ratedenclosureexemp-'ionrequestforFireZone44S,AuxiliaryBuildingSouth,el609ft,bothunits7-647.11FixedsuppressionexemptionrequestforFireArea53,Unit1ControlRoom7-757.12FixedsuppressionexemptionrequestforFireArea54,Unit2ControlRoom7-827.13Fire-rateddamperexemptionrequestforAuxiliaryBuildingHVACDuctPenetrationsforFireZones1,6N,6S,44N,44S,49,50,52and697-897.14Fire-ratedsealexemptionrequest7-107forContainmentBuildingseismicgapsforFireZones7,8,9,10,11,1222g23g2425262733B/34B,38,39,49,50,69,108and109Page7-6 7.2RHR/CTSPumArea,AuxiliarBuildin,Elevation573ftEXEMPTIONREQUESTPertheprovisionof10CFR50.48(c)(6)and10CFR50.12,IndianaMichiganElectricCompanyrequestsexemptionfromthespecificrequirementsofAppendixRSectionIII.G.2;i.e.,anautomaticfiresuppressionsystemshallbeinstalledinthearea.7.2.1AreaDescritionTheRHR/CTSPumpArea,whichcontainsFireZones1,lAthrough1H,136,137,138A,138Band138C,islocatedintheeastcentralsub-basementflooroftheAuxiliaryBuildingatelevation573ft.Theareacontainsalargeareacommontobothunits,eightindividualcubi.clescontainingresidualheatremovalpumpsandcontainmentspraypumpsfor,bothunits,threeindividualcubicles.containingCVCS.hold-uptanks,and.twopipetunnels.that'relocatednorthandsouthofFire,Zone1.;These-locationshave'owcombustibleloading,,-arebehind,lockedaccessgates,arenotnormallyaccessible,andcontainnosafeshutdownequipmentorcables.Assuch,theyarenot,mentionedelsewhereinthisexemptionrequest.Eachoftheeightpumpcubicleshasacontrolledaccessscreenmeshdoorthatislocatedbehindamissileshieldwall.Asectionofthewallformingtheentrancewayisprovidedwitharemovableblocksection(4ftx5ft)forpumpmaintenance.Theblocksarereinforcedwithanumberofperpendicularlengthsofsteelchannelaffixedtothepermanentsectionofthewall.Page7-7 TheRHRpumpsofeachunit'reseparatedfrom'eachotherbythree-hourconstructedwallsrunningnorthandsouth.TheUnit1pumpsareseparatedfromtheUnit2pumpsbyapproximately23ftbetweenthewallsformingtheentranceway.Thefloor.and,cei.ling...barriersarealsoofth'reeh-ourconstruction..'The'ccess','doorsarescreenmeshforventilationpurposes;however,themissile.-'shieldwalls,approximately14ftinlengthforminga"T"attheentranceways,extendbeyondthewidthofthedoorway.Theentrancewaysto'he"pumpcubicles're<<providedwithcurbs6incheshigh.Thesuctionvalvesforthepumpineachcubicle",arelocated.;.behindpart-heightmissile"'hield'walls'rovided.withanaccessway*and='a,3ft.6in.-high'urb'ormingpartof;-'themissile'shield.Thecenterlinesof'.the,'RHRpumpsarelocatedapproximately1~2ftfromtheentrance;waysof'thecubiclesandapproximately4ftfromthewalldividingthepumpsfor,eachunit.Theindividualpumpcubiclesareprovidedwithfloordrains.Entrytotheareaisfromelevation587ftviaastairwaythatislocatedinthecommonsectionbetweentheUnit'1andUnit2RHRpumpcubicles.'.Twoelevatorsalsoaccesstheareaonepassengerandonefreight.PertinentroomdimensionaldataiscontainedinFireAreaSummaryEvaluationTable7.2-1andFigure7.2.Page7-8 7.2.2SafeShutdownEuimentThisfireareacontainstheUnit1residualheatremovalpumps(PP-35EandPP-35W)locatedinthenorthcubiclesandUnit2residualheatremovalpumps(PP-35EandPP-35W)inthesouthcubicles.Thesuctionvalveforeachpumpislocatedintherespectivecubicle.behindmissile.:shieldwalls.(IMO-310forPP-35EandIMO-320forPP-35W).Thecontainmentspraypumpsarelocatedinindividualcubiclesalso,butarenotnecessaryforsafeshutdown.Thepowercable...associated"with=theRHRpumpsentersthefireareathroughconcrete-embedded.conduitandisroutedintotheindividual,pumpcubicles.,-Cablefor:theRHR.pumpsuction,valves.and,the"minimumflow,,valves..is.present",inthecommonarea'etweentheUnit1andUnit-2,,pumpcubicles..Each.pump'.cubicle"-containsonlythe"componentsand-cabling.associatedwiththatpump.Acableforthe.green.trainUnit2chargingpumplubeoil"pumpisalsointhecommonzone;however,allotherUnit2andUnit1CVCSsafeshutdowncablesarelocatedoutsideofthisfirearea.7.2.3FireProtectionSstemsThisfireareacontainsnoautomaticsuppressionsystems.1manuall-l/2-in.hosereelwithadjustableanglespraynozzleislocatedinthecommonfirezone.Four20lbABCdrychemicalextinquishers,four15lbCO2extinguishersanda1-inchCO2hosereelof150ftlengtharealllocatedinthefirearea.Page7-9 ThisfireareaisequippedwithsevenionizationsmokedetectorsthatalarmintheUnit",'Control:RoomontheEmergencyFirePanel.Nodetectionexistsintheindividualpumprooms.7.2.4FireHazardsAnalsisThisfireareaisconstructedinsuchawaythateachresidualheatremovalpumpisseparatelylocatedin'nindividualroomisolatedfromitsredundantdivisionbyaconcretewall.EachpumproomhasanaccesscontrolgatethatisaccessiblefromthecommonareaseparatingUnit1fromUnit2.Theaccessgatesforeachroomare,located.behindmissileshieldwallsthatforma>T"infrontofthepumproomsof'achunit.Theshieldwallfunctionsasaradiant"energyshieldprovidingprotectionfromfiresoutside'he,pump:-cubicles.Eachpumproom-hasfloordrainsandthepump.rooms.arecurbedattheentrancedoors.Anexhaust'.ventilation.duct,.is"providedforeachRHRpumpcubicle.Theseductsareroutedtoa,commonverticalairshaft.AseparateairshaftisprovidedforeachunittoconnecttheUnit1EastandWestPumpRoomsandtheUnit2EastandWestPumpRooms,respectively.Thefireareahasafixedcombustibleloadingofunder20,000Btu/ftforanequivalentfireseverityofunder15,minutes.'Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare4079Btu/ft2and2.9minutes,respectively.)Nospecificsectionsofthefireareathatcontainhighdensitiesofcombustiblematerialsexist.Page7-10 Transientcombustiblesarenotcarriedthroughthisfirezoneastheaccessiseitherviaanelevatororastairway.Theindividualpumproomsareseparatedbyll't4in.centerline-to-centerlinewithaconcretewallmidwaybetweeneachroom.Thecubiclesareconstructedsuchthatthedistancefromonepumptoanother,asmeasuredby,existingonecubicleandenteringtheother,isgreaterthan20ftwithnointerveningcombustibles.Theproposedmodificationswillupgradethewallsseparatingthepumpstothree-hourbarriers.Theexistingventilationducts,that,could~transmit.hot.combustiongasesfromonepumpcubicletoitscounterpartwillbeprotectedwithfire-rateddampers..Withthese.:modifications,.afireinonecubiclemusttravelthecircuitous,pathvia,,the""accessgateslocated'behindthemissileshield"-enclosures~",from.one,.cubicletoththerinordertoaffectboth,'pumps,:of,oneunit./A'fireinthecommonsectionbetween,-unitswould".have.totravelbehindthe-missile,shieldwall(approximately14ftlong}andenterbothredundantpumpcubicles.Thusconstructed,nomodificationstotheaccesscontrolgates,formedofscreenmeshforventilationpurposes,areproposed.ITheconduitsforthepowercables.'fthefour.RHRpumpsarelocatedinthecommonUnit1and2-area.Theredandgreentrainsofeachunitareseparatedbyapproximately17ft.The.conduitsforthereddivisionpumpsofbothunits(1PP-35Wand2PP-35W)willbeprovidedwithone-hourprotectionfromanPage7-11 exposurefire;Duetothelength'ftimebeforewhichtheRHRsystemmustbeinoperation,<<'-thesuctionvalveswillbemanuallyoperatedattheappropriatetime.Theceilingsinthepumpcubicleshaveverticalpipe,exitingthroughsleeves.Thepenetrationwillbeprovidedwit'hsealstopreventafirein.oneofthecubiclesfromaffectinganycomponentsintheelevationabove.Eachpumpcontainstwogallonsoflubricatingoil;however,absentanyignitionsourcethissmallquantityofoilpresentsnothreattoredundant,safe,:shutdownequipment.7<.2.5ProosedModificationsThefirehazardsanalysisperformedrevealedthatthisfireaxeaisnot',in-compliancewithAppendix'and,as'result,thefireareawillbeupgradedwith'fireprotectionmodifications.7.2.5.1VentilationDuctsTheventilationducts'connectingeachunit'seastandwestRHRpumproomswillbeprovidedwiththree-hour-ratedfiredampers.Anengineeringevaluationhasbeenperformedjustifyingthelackoffire-rateddampersintheexhaustventilationductsoftheCTSpumpcubicles.SeeSubsection9.4forthisevaluation.TheexemptionrequestinSubsection7.13providesjustificationforexistenceofundamperedventilationductspenetratingthroughtheceilingofFireZone1.Page7-12 7.2.5.2Penetrations,ThepenetrationsinthewallseparatingtheEastandWestPumpRoomsofeachunitwillbeprovidedwiththree-hour-"'ratedfireseals.Thepenetrationsthroughtheceilingtotheaboveelevationwillbeprovidedwithatleastone-hour-ratedfireseals.Engineering,evaluationshave'.beenperformedjustifyingtheexistence.oftheunratedopeningsintheceilingofFireZoneslAthrough1Hforleakagedetectionpurposes.TheseleakagedetectionchasesconnectRHRandCTSpumproomstotheirrespectiveheatexchangercubicles.'hechasespassthroughthefirezonesinwhichthechargingpumpsarelocated.Thesezonesarelocatedbetweenthepump,andheatexchangercubicles,withsteelplatecoversproviding:access.'into':the'.chasesforleakdetection-purposes.;SeeSubsections,'-9.31'and9.32fortheseevaluations.7.2.5.3AreaDetectionAdditionalareadetectionwillbe'rovidedtoincludetheindividualpumproomsfortheeightpumpsinthefirearea.7.2.5.4RHRPumPowerCablesThe4-inchconduitscontainingthecableforredundantdivisionsofeachunitarepresentintheextremenorthwestandsouthwestcornersofthecommonareabetweenunits.Thereddivisionpumppowerconduits(8003R-1and8003R-2)willbeprovidedwithfireprotectionbarriersequivalenttoaone-hourrating,thusensuringavailabilityofonedivisionperunit.Page7-13 7.2.S.S~StairwaaModificationswillbe"madeforstairvaysuppressioninaccordancewithSubsection8.2.2.7,.2.6ConclusiontBasedonthepreviousanalysis,exemption'srequestedfromanautomaticsuppressionsystemintheareasasprescribedinSectionIII.G.2ofAppendixR.exemptionaresummarizedasfollows:Thebasesthatjustifythe(2)ThewallsseparatingRHRpumps.villbeupgradedtothree-hourratingsandthec'eilingpenetrationsaretobeupgradedprovidingaone-hourfirerating.Theconduitscontainingcablesforthereddivisionpumpofeachunitaretobeprovidedwithone-hourprotection.(3).Theexistingdetectionsystemistobeextendedtoincludeeach'oftheeightindividualpumprooms.'-(4)(5)(6)'(7)Theventilation,systemconnectingredundant.RHRpump.cubicles:istobe-*providedwiththree-hour-ratedfiredamperstoprovideseparationofredundantdivisions.Thefixedcombustibleloadingisunder20,000Btu/ftvithnoallowablestorageoftransientcombustibles.The,fireseverityislessthan15'inutes,vithanexistingfireseverityofapproximatelythreeminutes.Theindividualpumproomsareconstructedtopreventfirefromleavingonepumproomandenteringanotherorfromenteringtwopumproomsfromthecommonarea.Nointerveningcombustiblesarepresentthatpresentahazardtothetworedundantdivisionsortoeachunit'sreddivisions.(8)ModificationsrequiredtomeetSectionIII.G.2wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.Page7-14 (9)TheRHRsystem.isnotrequiredtooperateformanyhoursafterthefire,andvalvesatthattimewillbemanuallyalignedtoinitiateMode4operation.(10)RepoweringofRHRpumpsforcoldshutdownisavailableforanyRHRpumpwithfireaffectedpowercable(seeSection5).(11)Subsections7.13,9.4,9.31,9.32and9.33providethefirehazardsanalysesand/orsafe.shutdownevaluationsperformedtojustifytheexistence,of.unratedboundarycomponentsinthisfirearea.Page7-15 SUMMARYEVALUATIONTABLE7.2-1FIREAREA:FireZone1,1AthroughlH,136,137,138Athrough138CDESCRIPTION:RHR/CTSPumpArea,AuxiliaryBuilding,Elevation573ftEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstructiona.WallsNorth-reinforcedconcrete.,inexcessofthree-hour.ratingSouth-reinforcedconcrete,hourratingEast-reinforcedconcrete,hourratinginexcessofthree-"inexcessofthree-West-reinforcedconcrete,inexcessofthree-hourratingb.Floor-reinforcedconcrete,inexcessofthree-hourrating;flooriscurbedandhasdrainsc.Ceiling-reinforcedconcrete,inexcessofthree-hourrating2.3.4~5.6.Ceilingheight"-llft3in.Area-14,450ft2Areavolume-229,926ftVentilation-36,000cfmAccessinZone-UnobstructedPage7-16 SafeShutdownEquipmentIMO-310RHRPumpSuction(Units1&2)PP-35ERHRPumpEast(Units1G2)IMO-320RHRPumpSuction(Units162)PP-35WRHRPumpWest(Units162)C.FireHazards1.Typeofcombustiblesinarea-Cableinsulation'ubeoilCellulosicsClassBsolventsPlasticsRubber2.3.Totalfixedcombustibleloadingconsideredforthepurposeof-theanalysis-20,000Btu/ft"Actualquantityoffixedcombustibles-Cable-17,448,738Btutubeoil-.16,607,100Btu'tCellulosics-18,223,822BtuClassBsolvents-3,102,000BtuPlastics-2,803,000BtuRubber-15,800,975BtuTOTAL-4079Btu/ftD.ExistingFireProtection1.FireDetectionSystems-Ionization,with7detectorsAlarminUnit1ControlRoomonEmergencyFirePanelPage7-17 2.FireExtinguishingSystems-Manual4-20lbABCdrychemicalextinguishers4-15lbC02extinguishers1-C02hosereelwith150ft1in.hose1-waterhosereelwith75ft1-1/2in.hoseandadjustableanglespraynozzlePage7-18 7.3FireArea14TransformerRoom,Elevation591ftUnit1EXEMPTION'EQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionfromthespecificrequirementsofAppendixRSectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthefirearea.7.3.1AreaDescritionLocatedimmediatelynorthoftheUnit1"CD"DieselGeneratorRoomatelevation591ft,FireArea14hasthree-hour-ratedwalls,floorandceiling,exceptfortwo1-1/2hourdamperstotheTurbineBuildingandanunratedfieldfabricatedfusiblelinkguillotine-typedampertotheUnit1DieselOilPumpRoom(FireArea13).Subsection9.7presentsthe.engineeringevaluationthatwas.performed,tojustifythisunrateddamper.ThisfireareahasthetwoUnit1pressurizerheatertransformerslocatedapproximately12ftapartandthetwoUnit1emergencydieseltestbreakers.Accesstotheareaisthroughanunlabeleddoorbuilttoathree-hourratingapproximately12ftwidethatfacestheTurbineRoom.PertinentroomdimensionaldataiscontainedinFireArea14SummaryEvaluationTable7.3-1andFigure7.3.7.3.2SafeShutdownEuimentFireArea14containsthepressurizerheatertransformersforUnit1(TRllPHAandTRllPHC),which'renotrequiredforsafeshutdownbutidentifiedforoperational,flexibility,andtheUnit1emergencydieselgeneratortestbreakers(DGTADandDGTCD)withassociatedcables'.Page.7-19 7.3.3'ireProtectionSstemFireArea14presentlycontainsnoautomaticsuppressionordetectionsystem.Amanuall-l/2in.waterhosereel(75ft)-withadjustablewaterspraynozzleisadjacenttothefirearea.'Two20lbPurple-Kdrychemicalandtwo15lbCO2extinguishersarelocatedinthearea.7.3.4FireHazardsAnalsisFireArea14isboundedbythree-hour-ratedbarrierswiththeexceptionof(a)twodampers,eachratedl-l/2hours,locatedinthewestwalltoFireZone<79,theTurbineRoomofUnit1,and,(b)anunratedfieldfabricatedfusiblelinkguillotine-type-<<dampertotheUnit1DieselOil'umpRoom(FireArea13)."Subsection.9.7presentstheengineeringevaluationthatwaspperfo'rmed,tojustifythisunrateddamper.Inaddition,the~accessdooris:.specifications.anunlabeledroll-updoorbuiltto'three-hourTheemergencydieselgeneratortestbr'eakersarelocatedapproximately40ftapart.Thepressurizerheatertransformer'sarenoncombustibleand'pproximately12ftapart.Theareahasafixedcombustibleloadingofunder13,000Btu/ftforanequivalentfireseverityofunder10minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare1056Btu/ftand0.8minute,respectively.)TherearenospecificsectionsofthefireareaIthatcontainhighdensitiesofcombustiblematerials.Page7-20 AfireinthisfireareacouldaffectbothemergencydieselgeneratorsandthepressurizerheatersforUnit1andconsequentlywouldaffecttheemergencypowersystemsinUnitl.AllUnit2systemsareunaffectedbyafireinthisareaand,thus,alternateshutdowncapabilityexistsusingUnit2systems.7.3e5ProosedModificationsTheFireArea14willbeequippedwithautomaticdetectionwithalarmingfunctionsintheUnit1ControlRoom.AsalternateshutdowncapabilityexistsusingUnit2systems,noothermodificationsareproposed.forthisfirearea14.-7.3.6ConclusionBasedon,thepreviousanalysis,'nexemptionisrequested'romtherequirementthatafixedsuppression'system.'e'installed:inareaswherealternateshutdowncapabilityexists"as.prescribed'nSectionIII.G.3ofAppendixR.'-,The,basesthatjustify'.the".exemptionaresummarizedasfollows:AlternateshutdowncapabilityexistsusingUnit2systems.(2)(3)(4)Themodificationsproposedincludetheinstallationofanautomaticdetectionsysteminthefirearea.The.fireareahasaminimumratingofonehour.Thecombustib/eloadingofthefireareaisunder13,000Btu/ftandfireseverityiscalculatedtobelessthan10minutes.(5)(6)ModificationsrequiredtomeetSectionIII.G.3wouldnotsignificantlyenhancefireprotectionsafetyabovethat.areprovidedbypresentcommitments.Subsection9.7providesthefirehazardsanalysisperformedtojustifytheunrateddampertoFireArea13.Page7-21 SUMMARYEVALUATIONTABLE7.3-1FIREAREA:14DESCRIPTION:TransformerRoom,Elevation591ft,Unit1EVALUATIONPARAMETERSSUMMARYA.AreaDescription1.Construction-a.WallsNorthSouthEast-reinforcedconcrete,inthree-hourratingreinforcedconcrete,inthree-hourratingreinforced.concrete,inthree-hourratingexcessofexcessofexcessofWestb.Floorc.Ceilingreinforcedconcrete,.inthree-hourratingreinforcedconcrete,inthree-hourratingreinforcedconcrete,inthree-hourratingexcess'fIexcessofexcessof2.3.5.6.Ceilingheight-12ft7in.Area-2072ftRoomvolume-25,900't3Ventilation-18,000cfmAccessinZone-UnobstructedPage7-22 B.SafeShutdownEquipmentTRllPHA-4kV/480VTransformer11PHATRllPHC-4kV/480VTransformerllPHCC.FireHazards1.Typeofcombustiblesinarea-CableinsulationPlasticsRubber2.Totalfixedcombustibleloadingconsideredjor'hepurposeoftheanalysis-13,000Btu/ft3.Actualquantityoffixedcombustibles-Cable-1,322,400BtuPlastics-767,025BtuRubber-100,800BtuTOTAL-1056Btu/ftD.ExistingFireProtection1.FireDetectionSystems-None2.FireExtinguishingSystems-2-20lbPurple-Kdrychemicalextinguishers2-15lbC02extinguishers1-waterhosereelwith75ftl-l/2in.hoseandadjustablewaterspraynozzlePage7-23 7.4FireArea20TransformerRoom,Elevation591ftUnit2EXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)'and10CFR50.12Indianaand,MichiganElectricCompanyrequestsexemptionfromthespecificrequirementsofAppendixRSectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthefirearea.7.4.1AreaDescritionLocatedimmediatelysouthoftheUnit2"AB"DieselGeneratorRoomatelevation591ft,FireArea20hasthree-hour-ratedwalls,floorandceiling,exceptfortwol-l/2hourdamperstotheTurbineBuildingandanunratedfieldfabricatedfusiblelinkguillotine-typedampertotheUnit'DieselOilPumpRoom(FireArea21).Subsection9.8presentstheengineeringevaluationthatwasperformedtojustifythisunrateddamper.AThisfireareahasthetwoUnit2pressurizerheatertransformerslocatedapproximately12ftapartandthetwoUnit2emergencydieseltestbreakers.Accesstotheareaisthroughanunlabeleddoorbuilttothree-hourspecificationapproximately12ftwidethatfacestheTurbineRoomforUnit2inthewestwall.PertinentroomdimensionaldataiscontainedinFireArea20SummaryEvaluationTable7.4-1andFigure7.4.7.4.2SafeShutdownEuimentFireArea20containsthepressurizerheatertransformersforUnit2(TR21PHAandTR21PHC),whicharenotrequiredforsafeshutdownbutidentifiedforoperationalflexibility,andtheUnit2emergencydieselgeneratortestbreakers(DGTABandDGTCD)withassociatedcables.Page7-24 7.4.3FireProtectionSstemFireArea20presentlycontainsnoautomaticsuppressionordetectionsystems.Amanuall-l/2in.waterhosereel(75ft)withadjustablewaterspraynozzleisadjacenttothefirearea.Two20lbPurple-Kdrychemicalandtwo15lbC02extinguishersarelocatedinthearea.7.4.4FireHazardsAnalsisFireArea20isboundedbythree-hour-ratedbarrierswiththeexceptionof(a)twodampers,eachratedatl-l/2hours,locatedinthewestwalltoFireZone85,theTurbineRoomofIUnit,2,and(b)anunratedfieldfabricatedfusiblelinkguillotine-typedampertotheUnit2Diesel.'OilPumpRoom(FireArea21).,Subsection,,9.8presents",theengineeringevaluationthatwasperformed,tojustify,thi'sunrateddamper..Inaddition,theaccessdoorisanunlabeledroll-updoorbuilt'othree-hour'specifications.Theemergencydieselapproximately35ftapart.generatortestbreakersarelocatedThepressurizerheatertransformersTheareahasafixedBtu/ftforanequivalentfireseverityofunder15minutes.arenoncombustibleandapproximately12ftapaxt.combustibleloadingofunder20,000(Theactualcombustibleloadingexistingatthistimeare1503tively.)andequivalentfireseverityBtu/ftand1minute,respec-2Page7-25 AfireinthisareacouldaffectbothemergencydieselgeneratorsandthepressurizerheatersforUnit2andconse-PquentlywouldaffecttheemergencypowersystemsinUnit2.AllUnit1systemsareunaffectedbyafireinthisareaandthusalternateshutdowncapabilityexistsusingUnit1systems.7.4.5ProosedModificationsFireArea20willbeequippedwithautomaticdetectionwithalarmin'gfunctionsintheUnit2ControlRoom.Asalternateshutdowncapabi.lityexistsusingUnit1systems,noothermodificationsare.proposedforthisfirearea.7,',.4.6ConclusionBasedonthepreviousanalysis,;exemptionisrequestedfromtherequirementthatafixed.'uppressionsystem'einstalledinareas.wherealternate"shutdowncapabilityexistsas'prescribedi.'nSectionIII.G.3ofAppendixR.-Thebasesthat'justifytheexemptionaresummarizedasfollows:l(1)AlternateshutdowncapabilityexistsusingUnit1systems.(2)Themodificationsproposedincludetheinstallationofanautomaticdetectionsysteminthefirearea.(3)Thefire,areahasaminimumratingofonehour.(4)Thecombustibleloadingofthefireareaisunder20,000Btu/ftandfireseverityiscalculatedtobelessthan15minutes.(5)ModificationsrequiredtomeetSectionIII.G.3wouldnotsignificantlyenhanc'efireprotectionsafetyabovethatprovidedbypresentcommitments.(6)Subsection9.8providesthefirehazardsanalysisperformedtojustify-theunrateddampertoFireArea21.Page7-26 SUMMARYEVALUATIONTABLE7.4-1FIREAREA:20DESCRIPTION:TransformerRoom,Elevation591ft,Unit2EVALUATIONPARAMETERSSUMMARYA.AreaDescription1.Construction-a.WallsNorth'SouthEast'.~Westb.Floor,c.Ceilingreinforcedconcrete,:three-hourrating-.reinforcedconcrete,three-hourrating-reinforcedconcrete,,.three-hourratingreinforced"concrete,three-hourratingreinforcedconcrete,,three-.hour,ratingreinforcedconcrete,three-hourratinginexcessofinexcessof.inexcessofinexcess$K~ofinexcessofin:-.excess'o&2.,3~'5.'6.Ceiling,height-12ft7in.Area-2072ftRoomvolume-25,900ftVentilation-18,000cfmAccessinZone-UnobstructedPage7-27 B.SafeShutdownEquipmentTR21PHA-4kV/480VTransformer21PHATR21PHC-4kV/480VTransformer21PHCC.FireHazards1.Typeof.combustibles,inarea-CableinsulationPlasticsRubber2.Totalfixedcombustibleloadingconsideredforthepurposeoftheanalysis-20,000Btu/ft~3..Actualquantityoffixedcombustibles-Cable-1,558,619BtuPlastics-1,457,'250BtuRubber-100,800'BtuTOTAL.-1503Btu/ftD,'.,'xisting-Fire.Protection1.Fi;reDetectionSystems.-None2.FireExtinguishingSystems-Manual2-20lbPurple-Kdrychemicalextinguishers2-15lbC02extinguishers1-water'hosereelwith75ftl-l/2in.hoseandadjustablewaterspraynozzlePage7-28 7.5FireZone29(A,B,E)Unit1EssentialServiceWater,PumsandMotorControlCentersEXEMPTIONREQUESTPertheprovisionsof10CFR50(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionfromthespecificrequirementsofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthearea.7.5.1AreaDescritionFireZone29(A,B,E)islocatedontheeastcentralsideof'hescreenhouse,thatisadjacenttotheTurbineBuildingelevation591ft'.Thefire'zone~is'comprisedofthetwopumpcubiclesforUnit1ESWpumps.(PP-lEandPP-1W)each.locatedinmissile-barrieredenclosures.anda'separate.cubiclefor'themotorcontrolcenters.,(lPS-A'and1PS-D)...FireZone29"(A,'B,~E)isthecounterpartofUnit'2Fire,Zone29(C,D,F).Accesstothepumpsisgainedthroughthenorthsideaccess'ontrolgatefromthescreenhousearea.Theaccessgateisconstructedofscreenmeshforventilationpurposes.Additionalventilationisprovidedthr'oughundamperedductopeningsintheceilingof29Aand29BtoprovidecoolingtotheESWpumps.;Subsection9.25presentstheengineeringevaluation"thatwasperformedtojustifytheseundamperedventilationductopenings.Thepumpcubiclesshareacommoncorridorwithawallseparatingthepumpsandamissileshieldperpendiculartothe.wallpartiallyenclosingthepumps.ThepumpsareinstalledonPage7-29 pedestalsapproximatelyfourfeetofftheground.Theeast/westwallseparatingthisUnit1zonefromtheUnit2zoneisthree-hour-rated.AstairwayispresentinthenorthwestcornerofthewestpumproomFireZone29Bthat.accessesFireZone29G,thelevelimmediatelybelo~,theUnit'1'and'nit2ESWpumpareas.11HThemotor.controlcentersarelocatedadjacenttoeachother-inacommonenclosurewithascreenmeshaccesscontrolgateprotectedbyamissileshieldwall.Pertinentroomdimensionaldataiscontained:"inFi'reZone'9(A,B,E)"SummaryEval'uationTable7.5-1and-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-701andWMO-702),'and-bothmotor,'controlcenters(1PS-Aand1PS-D)thatservethestrainersandvalves.No-Unit2andnootherUnit1safeshutdowncableorequipmentislocated,inthefirezone.7.5.3FireProtectionSstemsFireZone29(A,B,E)presentlyhasnofixedsuppressionorautomaticdetection.andcontainsonlycablesandcomponentsfortheUnit1EssentialServiceWaterSystem.Thezonecontainsal-l/2in.waterhose"reel'('75't)outsidethezoneattheaccessgatetopumpenclosure."Outsidethezoneinthescreenhousearethree20lbPurple-Kdrychemicalandthree15lbCO2fireextinguishers.Page7-30 7.5.4FireHazardsAnalsisTheUnit1pumpenclosuremaysustainafirethatcouldbeassumedtorenderbothUnit1ESWpumpsinoperable.Similarly,afireinthemotorcontrolcentercubiclewouldrendertheassociatedUnit1strainersandvalvesinoperable.Thewalls,floors,andceilingsofFireZone29(A,B,E)arethree-hour-thestairwaytoFireZone29Gthatisaratedexceptfor(a)performedtojustifytheseundamperedventilationductopenings.(FireZone29GisdiscussedinSubsection'.7.)commonUnit1/Unit2zonebelowthepumpcubicles,(b)thescreenmeshaccessgatesthatprovideentrancetothesezonesfromFireZone142,,and(c),.undamperedceilingventilationductopenings.Subsection9.25presentstheengineeringevaluationthatwasThe"motorcontrolcentersforUnit,lareseparatedfromUnit2by48ft,andeachisinaseparatecubicle..ThecablesexitingtheMCCsareembeddedinconcreteandarerouteddirectlytotherespectiveunit'spumpcubicles.ThepowercablefortheESWpumpsisroutedfrombelowthepumpsinFireZone29Gupthroughthefloor.Eachpumpcontainsfivegallonsoflubricatingoil;however,Iabsentanyignitionsource,theoilpresentsnothreattotheESWpumpsinbothunits.Becauseofitslocation,FireZone29(A,B,E)isnotinapathnormallytraversedwithtransientcombustibles.Page7-31 NotransientcombustiblesareallowedtobestoredinFireZones29A,29Bor29E,andfixedcombustiblesamounttothesmallquantityoflubeoilforeachpump,asmallamountofplastics,andcableinsulation..ThetotalfixedcombustibleloadingofFireZones.29A,29Band29Eisunder20,000Btu/ftforanequivalentfireseverityof-underl5mi.nutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare6667Btu/ftand5minutes,respectively.)Therearenospecificsectionsofthefirezonesthatcontainhighdensitiesofcombustiblematerials.TheUnit1ESW,systemiscross-tiedoutsidethezonetotheUnit2ESWsystem.'herefore,.existsfor.FireZone29(A,B,E)b:providingessentialservicewater;.servicetoUnit2.alternateshutdowncapabilityusingUnit2ESWcomponentstoUnitlwhilemaintaining7.5.5ProosedModificationsThefirehazardsanalysisperformedrevealedthatFireZone29(A,B,E)isnotincompliancewithAppendixRand,asaresult,thefirezonewillbeupgradedwiththeinstallationofan-automaticdetectionsystemthatprovidesalarmsintheControlRoom.7.5.6ConclusionBasedonthepreviousanalysis,exemptionisrequestedfromrtherequirementthatafixedsuppressionsystembeinstalledinPage7-32 areas'wherealternateshutdowncapabilityexistsasprescribedbySectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemptionaresummarizedasfollows:(1)-TheUnit1andUnit2ESWsystemsarecross-tiedoutsidethezoneand,.therefore,alternateshutdowncapabilityexistsforUnit1usingUnit2ESWsystems.NoUnit2.safeshutdownequipmentorcablesareinthefirezone.(2)Thefirezonewillbeprovidedwithanautomaticfiredetectionsystem.('3)TheUnit1ESWpumpsareseparatedfromUnit2ESWpumpsbyathree-hour-ratedwall.(4)FireZone.29GistobemodifiedtopreventafireinFireZones29A,29Bor29EthatspreadsdowntheopenstairtoFireZone29Gfromaffectingbothunits'SW'systems(seeSubsections7.7and9.25ofthisreport).\'t(5)Subsection9;25,presents'the.engineeringevaluation.=.performedtojustifythe,scr'eenmeshaccess"gatestotheESWpumpcubiclesandtheunratedsteelplatehatch=,,intheceilingofFireZone29G.to-the.,Unit2ESWpumpcubicles.Subsection9.25alsoidentifiestheproposedinstallationof-rateddampersin-the,>ceilingof'theUnit2ESWpumpcubicles.t(6)Thefixedcombustibleloadingisunder20,000Btu/ftwithafireseverityofunder15minutes.f(7)Thefirezonedoesnotprovideanormallyusedpathoftransientcombustibles.(8)ModificationsrequiredtomeetSectionIII.G.3wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments..Page7-33 SUMMARYEVALUATIONTABLE7.5-1FIREZONES:29(A,B,E)DESCRIPTION:Unit1EssentialServiceWaterPumpsandMotorControlCentersEVALUATIONPARAMETERSSUMMARYA.AreaDescription1..Construction-a.Walls.North-'-Southreinforcedconcrete,hourratingreinforcedconcrete,hourratings"in=excessofthree-inexcessofthree-East.HWestreinforcedconcrete,'nexcessofthree-hourratingreinforcedconcrete,inexcessofthree-hourratingb.Floor-reinforcedconcrete,inexcessofthree-hourratingc.Ceiling-reinforcedconcrete,inexcessofthree-hourrating2.Ceilingheight-16ft5in.forFireZones29Aand29B12ft9in.forFireZone29E3..Area-826ftZonesvolume'-13,261ftVentilation-20,000cfm6.AccessinZone-EquipmentformspartialobstructionPage7-34 B.SafeShutdownEquipment'P-1E-ESWPumplEPP-lW-ESWPump1WESWE-lEStrainerESWE-1WStrainerWMO-701-1EDischValveWMO-702-1WDischValve1PS-AMCCforpumpstraineranddischargevalve1PS-DMCCforpumpstraineranddischargevalveC.FireHazardsTypeofcombustiblesinarea-CableinsulationLubeoilPlastics2.3.Totalfixed.combustibleloadingconsideredforthepurposeoftheanalysis-20,000Btu/ftActualquantityoffixedcombustibles-Cable-3,570,454BtuLubeoil-1,461,000BtuPlastics-475,792TOTAL-6667Btu/ftD.ExistingFireProtection1.FireDetectionSystems2.NoneFireExtinguishingSystems-Manual20lbPurple-Kdrychemicalextinguishers,outsidepumpenclosuresinscreenhouse15lbC02extinguishers,outsidepumpenclosuresinscreenhouseWaterhosereelwith75ftl-l/2in.hoseandadjustableanglespraynozzlePage7-35 7.6FireZone29(C,D,F)Unit2EssentialServiceWaterPumsandMotorControlCentersEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12'ndianaandMichiganElectricCompanyrequestsexemptionsfromthespecificrequirementsofAppendixR,Section,III.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthefirearea.7.6.1AreaDescritionThisfirezoneistheUnit2equivalentofFireZone29(A,B,E).FireZone29(C,D,F)islocatedontheextremewestcentralsideofthescreenhousethatisadjacenttotheTurbine.Buildingelevation591ft..ThefirezoneiscomprisedofthetwopumpcubiclesforUnit2ESWpumps(PP-2EandPP-2W)eachlocatedinmissile-barrieredenclosures,andaseparatecubicleforthe:motorcontrolcenters.(2PS-Aand.2PS-D).Accesstothepumpsisgainedthroughthe.southsideaccess,controlgatefromthescreenhousearea.Theaccessgateisconstructedofscreenmeshforventilationpurposes.Additionalventilationisprovidedthroughundamperedductopeningsintheceilingof29Cand29D.Theductopeningswillbeprovidedwiththree-hour-rateddampers.Subsection9.25providesthe,engineeringevaluationthatrequiresaddingdamperstotheductopenings.Thepumpcubiclesshareacommoncorridorwithawall,separating.thepumpsandamissileshieldperpendiculartothewallpartiallyenclosingthepumps.eThepumpsareinstalledonpedestalsapproximatelyfourfeetofftheground.Theeast/westPage7-36 wallseparatingthisUnit2zonefromtheUnit1pumpsisthree-hour-rated.Anopenhatchispresentinthesoutheastcorneroftheeastpumproom.ThehatchprovidesaccesstoFireZone29GthatisthelevelimmediatelybelowboththeUnit1andUnit2ESWpumpareas.Themotorcontrolcentersarelocatedadjacenttoeachotherinacommonenclosurewithascreenmeshaccesscontroldoorprotectedbyamissileshieldwall.Pertinentroomdimensionaldataiscontainedi'nFireZone29(C,D,F)SummaryEvaluationTable7.6-1andFigures7.6.1and7.6.2.7.6.2SafeShutdownSstemsFireZone29(C,D,F)containsbothESWpumpsforUnit2(PP-2Eand.PP-2W),thestrainers-forboth'pumps(ESWSEandESWSW),thedischargevalvesforbothpumps(WMO-703andWMO-704')andbothmotorcontrolcenters(2PS-Aand2PS-D)thatservethestrainersandvalves.NootherUnit2andnoUnit1safeshutdownequipmentorcableislocatedinthefirezone.7.6.3FireProtectionSstemsFireZone29(C,D,F)presentlyhasnofixedsuppressionorautomaticdetectionandcontainsonlycablesandcomponentsfortheUnit2'Essential,ServiceWaterSystem.Thezonecontainsal-l/2.inchwaterhosereel(75ft)outsidethezoneattheaccessdoortothepumpenclosure.Outsidethezoneinthescreenhousearethree20lbPurple-Kextinguishers.drychemicalandthree15lbC02firePage7.-37 7.6.4FireHazardsAnalsisTheUnit2pumpenclosuremaysustainafirethatcouldbeassumedtorenderbothUnit2ESWpumpsinoperable.Similarly,afireintheMCCcubiclewouldrendertheassociatedUnit2strainersandvalvesinoperable.Thewalls,floors,andceilingsofFireZone29(C,D,F)arethree-hour-ratedexceptfor(a)the'ladderhatchto29G(fromtheeastpumpcubicle,whichisacommonUnit1/Unit2zonebelowthepumpcubicles),(b)thescreenmeshaccessgatesthatprovideentrancetothesezones-fromFireZone142,and(c)theundampered:ceilingventilation'ductopenings.(Fir'eZone29GisdiscussedinSubsection7.7.)The,motorcontrol,centersforUnit2a'eseparatedfromUnit"1by48.ftandeach-'isina'separatecubicle.'hecablesexitingI'theMCCsareembeddedinconcreteandarerouteddirectlytotherespectiveunit'spumpcubicle.ThepowercablefortheESW"'pumpsisroutedfrombelowthe.pumpsinFireZone29Gup.throughthefloor.Eachpumpcontainsfivegallonsoflubricatingoil;however,absentanyignitionsource,theoilpresentsnothreattotheESW'pumpsinbothunits.Becauseofitslocation,FireZone29(C,D,F)isnotinapathnormallytraversedwithtransientcombustibles.Notransientcombustiblesareallowedtobestored'nthefirezoneandfixedcombustiblesamounttocableinsulation,plastics,andthesmallquantityoflubeoi.lfromeach.ThetotalfixedcombustibleloadingofFireZones29C,29Dand29Fisunder20,000Btu/ft,foranequivalentfireseverityofunder15minutes.(TheactualcombustibleloadingandPage7-38 equivalentfireseverityexistingatthistimeare6379Btu/ftand4.8minutes,respectively.)Therearenospecificsectionsofthefirezonesthatcontainhighdensitiesofcombustiblematerials.TheUnit2ESWsystemiscross-tiedoutsidethezonetotheUnit1ESWsystem.Therefore,alternateshutdowncapabilityexistsforFireZone29(C,D,F)usingUnit1ESWcomponentstoprovideessentialservicewatertoUnit2whilemaintainingservicetoUnit1.7.6.5ProosedModif,icationsThefire-hazardsanalysisperformedrevealedthatFireZone29(C,D,F)isnotincompliancewithAppendixR,.andasaresultthefirezonewillbe.,upgraded*withfire',protectionmodifications.7.6.5.1DetectionSstemAnautomaticdetectionsystemwillbeinstalledinthefirezonethatprovidesalarmsintheControlRoom.7.6.5.2LadderHatch,Anengineeringevaluationhasbeenperformedjustifyingtheexistenceoftheunratedladderhatch.SeeSubsections7.7.4and9.25.7.6.5.3VentilationDuctsTheundamperedventilationopeningsintheceilingof29Cand29Dwillbeprovidedwiththree-hour-rateddampers.pertheevaluationinSubsection9.25.Page7-39 7.6.6"ConclusionBasedonthepreviousanalysis,anexemptionisrequestedfromtherequirementthatafixedsuppressionsystembeinstalledinareaswherealternateshutdowncapabilityexistsasprescribedbySectionIII.G.3ofAppendixR.exemptionaresummarizedasfollows:'1)TheUnit2.andUnit1ESWsystemsarecross-tiedandalternateshutdowncapabilityexistsforUnit2outsidetheareausingUnit1ESWsystems.NoUnit1safeshutdownequipmentorcablesareinthefirezone.(2)Thefirezonewillbeprovidedwithafiredetectionsystem.(3)Theunit,"2ESWpumpsareseparatedfromUnit1ESWpumpsbyathree-hour-ratedwall.(4)'An"engineeringevaluationhasbeenperformed.,thatconcludedthata-firewill-notpropagatethroughtheunrated.ladderhatchbetweenFireZones29Gand29C(seeSubsection9.25).(5)The.fixed..combustible'oadingisunder20,000Btu/ftwithafireseverityoflessthan15minutes.(6)Thefirezonedoesnotprovideanormallyusedpathoftransientcombustibles.(7)Subsection9.25presentstheengineeringevaluationperformedtojustifythescreenmeshaccessgatestotheESWpumpcubiclesandtheunratedsteelplatehatchintheceilingofFireZone29GtoFireZone29C.Subsection,'.9.25alsoidentifiestheproposedinstallationofrateddampersintheceilingofFireZones.29Cand29D.(8)Modificationsrequiredtomeet.Sectionill.G.3wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.Page7-40 SUMMARYEVALUATIONTABLE7.6-1FIREZONES:29(C,D,F)DESCRIPTION:Unit2EssentialServiceWaterPumpsandMotmorControlCentersEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstruction-a.WallsNorth-reinforcedconcrete,inexcessofthree-hourrating2.SouthEastWestb.Floorc.CeilingCeilingheightreinforcedconcrete,inexcessofthree-hourratingreinforcedconcrete,'.inexcessofthree-',hour.ratingreinforcedconcrete,inexcessofthree-hourratingreinforcedconcrete,inexcessofthree-,hourratingreinforcedconcrete,inexcessofthree-hourratingE16ft5in.forFireZones29Cand29D12ft9in.forFireZohe29F3.Area-826ft4.Zonevolume-13,261ft5.Ventilation-20,000cfm6.AccessinZone-Equipmentformspartialobstruction~Page7-41 B.SafeShutdownEquipmentPP-2E-ESWPump2EPP-2W-ESWPump2WESWSE-StrainerPP-2EESWSW-StrainerPP-2WWMO-703-2EDischValveWMO-704-2WDischValve2PS-AMCCforpumpstraineranddischargevalve2PS-DMCCforpumpstraineranddischargevalveC.FireHazards2.3.Typeofcombustiblesinarea-CableinsulationLubeoilPlasticsTotalfixedcombustibleloadingconsideredjor.thepurposeoftheanalysis-20,000Btu/ftActualquantityoffixedcombustibles-Cable-3,021,140BtuLubeoil-1;461;000BtuPlastics-786,592BtuTOTAL-6379Btu/ftD.ExistingFireProtection2.FireDetectionSystems-NoneFireExtinguishingSystems-Manual20lbPurple-Kdrychemicalextinguishers,outsideinscreenhouse3-15'lbC02extinguishers,outsideinscreenhouseWaterhosereelwith75ft1-1/2in.hoseandadjustableanglespraynozzle'Page7-42 7.7FireZone29GScreenhouseAuxiliarMCCRoom,Elevation575ft,BothUnitsEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionsfromthespecificrequirementsofAppendixR,SectionIII.G.2;i.e.,anautomaticfiresuppressionsystemshallbeinstalledinthefirearea.7.7.1AreaDescritionFireZone29GisthebasementlevelbelowtheessentialservicewaterpumpsofbothUnits1and2andcontainstwononsafeshutdownmotorcontrolcenters.The.firezonehasahatchwithaladderuptotheUnit2ESWsoutheastpumpcubicleandastairwaytothenorthwestUnit1pumpcubicle.Theceilingandwallsareallthree-hour-ratedexceptfortheunratedladderhatchandtheopenstairwell.Anengineeringevaluationhasbeendonejustifyingtheexistenceoftheunratedhatch(seeSubsection9.25).ConduitforallfourESWpumps,theirvalvesandstrainers,.enters.theeastwallviaembeddedconduitexceptforWMO-701(theUnit1eastpumpdischargevalve).Alltheconduitcomesthroughthewallinpullboxesat1nearceilingheightandimmediatelyexitsupintotheceilingslab.Thecablinginto'theceilingrunsinembeddedconduittoitsrespectivepumpcubicle.Allceilingandwallpenetrationsaresealed,with.three-hour-,ratedfireseals.PertinentroomdimensionaldataiscontainedinZone29GSummaryEvaluationTable7.7-1andFigure7.7.1.Page7-43 7.7.2SafeShutdownEuimentFireZone29Gcontainsnosafeshutdownequipmentexceptcablesinconduitforthecomponentsof.bothUnits1and2EssentialServiceWaterSystems.Thecablesforthefourpumpstrainersanddischargevalvesarelocatedinconduitandin.pull".boxesatceilingheight.TheconduitsenterthezonefromtheTurbineRoomfloorslabandimmediatelyexitthroughtheceilingslabtorespectivepumpcubicles.Exceptforoneconduit,thezoneexitpointsareallwithinthepullboxes.OneESWdischargevalve'(WMO-701)conduitrunsfromthepullboxnearthe'ceilingtothecubicleareafortheUnit1eastpump.Thefour~;pumppowercablesenterthezonethroughtheeastwallatabout~ceilingheight(beingrunintothezoneinthefloorslabofthe",Turbine.Building)'ndareroutedneartheceilingtothe:respectivepumpcubicleareawherethey'xitFireZone29G,throughtheceiling.7.7.3FireProtectionSstemsFireZone29Ghasnoautomaticsuppressionordetectionsystemsinstalledandisprovidedwiththemanualsuppressionwithinthezoneandsystemsavailableto29(A,B,E).7.7.4FireHazardsAnalsisFireZone29GisacommonzoneforbothUnit1andUnit2.TheonlysafeshutdownequipmentintheareaisconduitcontainingcablesfortheESWsystemsofbothunits.ThetotalfixedcombustibleloadingofFireZone29Gisunder13,000Page7-44 Btu/ftforanequivalentfireseverityunder10minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare11,858Btu/ftand8.8minutes,respectively.)Thepumppowercablesareinfourinchconduitenteringthefirezonethroughtheeastwall.Thevalvesandstrainersforallfourpumpslikewiseenterthefirezonethroughtheeastwallandimmediatelyexitupthroughtheceiling.Noprotectionpresentlyexistsfortheconduitsofallfourpumps.Thefirezoneprovidesnopathfortransientcombustibles;however,Iprotectiontoallc'ablingassociatedwithbothunits'SWsystemswillbeprovided.There.arenospecificsectionsofthefirezonethatcontainhighdensitiesofcombustiblematerials.AnopenstairwayenteringfromtheUnit1WestESWpumpcubicle,FireZone29B,andaladderandahatchopenin'gfromUnit2EastESWpumpcubicle,FireZone29C,provideacommonconnectionbetweenUnit1and2ESWpumpsviaFireZone29G.Hotcombustiblegases'romafireinFireZone29GcouldaffecttheESWpumpsinbothunits.ThehatchopeningfromtheUnit2Eastpumpcubiclewillpreventpropagationoffireeffectsintothepumparea.Anengineeringevaluationhasbeenperformedthatprovidesjustificationfornotcoatingthehatchbecausethiswillnotincreasethelevelofprotectionpresentlyprovidedinthearea.See.Subsection9.25fortheengineeringjustifications.ThehatchwillensurethathotcombustiblegasesresultingfromafireinFireZone29GwillnotaffecttheUnit2ESWpumps.Page7-45 TheUnit1westpumpcubicleisprovidedwith10,000cfmofductedsupplyair.AllcablingforthesupplyfansisembeddedinconcretefromtheMCCinFireZone29Etothefanmotors,withnoneofthecablingexistinginFireZone29G.Twosupplyfansareprovidedwithonlyonerequiredaseachprovides100:oftheAirisexhaustedfromthis"requiredairflowforthecubicle.Icubiclethroughthescreenmeshsecuritygateinthenorthwall.DuetothelowcombustibleloadinginFireZone29GandthesenaturalexhaustairflowpathsoutoftheUnit1Westpumpcubicle,hotgasesorotherproductsofcombustion'romafirein"'FireZone29Gthatwouldflowupthestairwaywillflowdirectly<<outofthecubicleandpreventtheformationofastratified~layerofhotgaseswithsufficientdepthtodamagetheUnit1ESW-pumps.-MichiganElectricCompanybelievesthatthepreviouslyproposedone-hourbarriersforall".fourtrainsachieveanequivalentor..superiorleveloffireprotectionforthezoneconfiguration.Inaddition,thedesignandinstallationissuesassociatedwiththethree-hourracewaybarrierssuggestthatimplementationofthatalternativeisnotpreferred.AttheNRCStaff'srequest,wehavereviewedthe,FireHazard'-"Analysistodetermineifthree-hourracewaybarriersfortwoofthefourESWpumptrainswouldbepreferabletoone-hourbarriersforallfourESWtrains.Basedonthelowin-situcombustibleloadingsandalackofmajoractivityinthezone,IndianaandPage7-46 Basedontheseconsiderations,boththeeastandwesttrainsofESWforbothUnits1and2willbeprotectedfromtheeffectsoffiresinFireZone29G.InthehighlyunlikelyeventthatafireinFireZone29GshouldcausefailureforbothUnit1ESW-pumps,alternateshutdowncapabilityforUnit1isavailablethroughtheuseoftheUnit2ESWpumps.The.alternative-shutdowncapabilityisdescribedinSubsection5.2.3.61Manualhosestationsareprovided'ntheScreenhouseforfighti'ngfiresinFireZone29G.Thehosestationsarelocatedsuchthatallportionsof,.FireZone29Gcanbecoveredwith75feetofhoseand30feetofwaterstream.,Figures7.7.2and7.7.3indicatethe,locationsofmanualhosestationsandportable.extinguishersforfightingfiresin.FireZone29G.7.7.5-ProosedModifications-The-fires-hazardsanalysisperformed.revealedthatFireZon'e.29G,isnotincompliancewithAppendixRandasa'esultthezone.willbeupgradedwithfireprotectionmodifications.7.7.5.1FireDetectionThefirezonewillbeprovidedwithanautomaticfiredetectionsystem.7.7.5.2HatchThehatchexitingthefirezonetotheeastpumpcubicleofUnit2wastobeprovidedwithatleastathree-hour-ratedfirehatchdoortoisolatetheUnit2pumproomsfromtheUnit1pumpPage,7-47 rooms(via29G).Anengineeringevaluationhasbeenperformedthatprovidesjustificationfornotprovidingathree-hour-ratedhatchsincethiswillnotincreasethelevelofprotectionpresentlyprovidedinthearea.engineeringjustifications.7..7.5.3~ConduitsSeeSubsection9.25fortheThefollowingconduitswillbeprovidedwithone-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'reValveConduitsThefollowingpumppower;=anddischargevalveconduitswillbeprovidewithone-hourprotectionfromtheentrytotheexitpointofthefirezone: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)7.7.6ConclusionBasedonthepreviousanalysis,exemptionisrequestedfromanautomaticsuppressionsystemasprescribedinSectionIII.G.2ofAppendixR.Thebasesthatjustifytheexemptionaresummarizedasfollows:Page7-48 (1)Anautomaticfiredetectionsystemistobeprovidedforthefirezone.(2)Theconduitsofbothdivisions(allfourpumpsandassociatedcomponents)aretobeprovidedwithone-hourfireprotection.(3)AnengineeringevaluationhasbeenperformedthatconcludedthatafirewillnotpropagatethroughtheunratedladderhatchbetweenFireZones29Gand29C(seeSubsection9.25).ie)Thefixedcorn/ustibleloadingofFireZone29Gisunder13,000Btu/ftwithafireseverityoflessthan10minutes.Thefirezoneisnotinanormalpathfortransportingtransientcombustibles.(6)ModificationsrequiredtomeetSectionIII.G.2wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovided'ypresentcommitments.Page7-49 SUMMARYEVALUATIONTABLE7.7-1FIREZONE:29G,DESCRIPTION:ScreenhouseAuxiliaryMCCRoom,Elevation575ft,bothunitsEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstruction-a.WallsNorthSouthreinforcedconcrete,hourratingreinforcedconcrete,hourratinginexcessofthree-inexcessofthree-East-reinforcedconcrete,.hourratinginexcessof.three-West-reinforcedconcrete,in,excessofthree-hourratingb.Floor-reinforcedconcrete,hourratingc.Ceiling-reinforcedconcrete,hourratinginexcessof,three-inexcessofthree-2.3.Ceilingheight-,12ft5in.Area-1544ft4~Roomvolume-19,171ftVen'tilation-0cfm6.AccessinZone-UnobstructedB.SafeShutdownEquipmentNonePage7-50' C.FireHazardsTypeofcombustiblesinarea-CableinsulationCellulosicsPlasticsRubber2.3.Totalfixedcombustibleloadingconsidered(orthepurposeoftheanalysis-27,000Btu/ftActualquantity.offixedcombustibles-Cable-17,285,320BtuCellulosics-257,238BtuPlastics"--719,065BtuRubber-50,400BtuTOTAL-11,858Btu/ftD.ExistingFireProtection1.FireDetectionSystems-2.NoneFireExtinguishingSystems-Manual20lbPurple-Kdrychemicalextinguishers,insidethezoneandoutsidepumpenclosuresinscreenhouse315lbC02extinguishers,insidethezoneandout-sidepumpenclosuresinscreenhouse!waterhosereelwith75ftl-l/2in.hoseand,adjustableanglespraynozzlePage7-51 7.8FireZones33,33A,33Band105Unit1EastMainSteamValveEnclosureandContractorAccessControlBuxldinEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionsfromthespecificrequirementsofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthefirearea.7.8.1FireAreaDescritionFireZones33,33A,33BarelocatedimmediatelyoutsidetheContainmentBuildingofUnit'1atanelevationof612ft.The"zonesincludethenorthareaaroundcontainmentthatcontainstainsteam'linesandalsoincludes-thenonessentialservicewatervalvegallery'onthewest'sidedirectlyoppositetheEastMain'SteamVa'lve-Enclosure;-ThefireareainwhichthesezonesareJ'-'1'ocated'alsoincludesFire-Zone105,theContractorsAccess'ControlArea.PertinentdimensionaldataiscontainedinFireZones33,33A,33Band105SummaryEvaluationTable7.8-1andFigure7.8.7.8.2SafeShutdownEuimentFireZones33,33A,33Bcontainallmainsteampressure"'transmittersforsteam.generators1and4,theelectro-pneumatictransmittersforallfourUnit1steamgeneratorpoweroperatedreliefvalves,steamgenerators1,and4auxiliaryfeedwaterinletvalves(FM0-211,212,241,242),thelocalshutdownindicationpanel(LSI-1)andthepoweroperatedreliefvalvesandsafetiesforsteamgenerators.1and4..Themainsteamstopvalvesforsteamgenerators1and4arealsointhearea.Page7-52 7.8.3FireProtection.SstemsFireZones33,33A,33Bhavenoautomaticsuppressionsystem.Athermistordetectionsystemandmanualwaterdelugesuppressionsystemisinstalledforthecharcoalfilterslocatedinthearea.FireZone105isprotectedbyanautomaticwetpipesprinkiersystem.Theareaalsohasmanual75ftl-l/2in.hosestationandC02fireextinguishers.7.8.4FireHazardsAnalsisAllinteriorwalls,floorsandceilingsareofreinforcedconcreteconstruction,withtheexceptionoftheunratedwall.thatseparatesFireZones33Aand105.Excludingdoorsandmetalbarrierstotheexteriorofthe.area,.seismicgapsbetweenContainmentandFire-Zones33,.33A,and33B,.openhatchtoFireZone116below,steel,grateinthefloor'ofFireZone33toFireZone8below,numerouspenetrationsofthewallbetweenFireZone33A,andFireZone108,andanunratedwalltoFireZone105,allbarriershaveaminimumfireratingofonehour.Engineeringevaluationsorexemptionrequestshavebeenperformedorgrantedjustifyingtheseunratedportionsoftheareaboundaries.(SeeSubsections7.14,9.23,9.29,9.35and9.38.)PenetrationsexistbetweenFireZone33BandFireZone12andwillbesealed.Theanalysisindicatedthepresenceofallfoursteamgeneratorpower-operatedreliefvalveEPTsinthesezones.Thetransmittersaregreaterthan100ftapart;however,alternate4Page7-53 shutdowncapabilitieswillexistforthisareawiththeproposedmodificationstothesteamgeneratorPORVs.Thefixedcombustibleloadingoftheareaisunder27,000Btu/ftforanequivalentfireseverityofunder20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare11,530Btu/ftand8.5minutes,respectively.)2Ofthetotal,approximately45%ofthecombustibleloadingiscontainedinFireZone105;thiszoneisprotectedbyanautomaticwetpipesprinklersystem.7.8.5ProosedModificationsTheonlyredundantcomponentsintheareanecessaryforsafe,-shutdownaretheEPTsforthefourr"EPTsandtheirassociated'ablesare'"fireaffectbothtrainsofsteamsteamgeneratorPORVs.Theover100ftapart.ShouldageneratorPORVsonedivision'willbeoperable"outside,thearea=atalocalcontrolstation.7.8.5.1FloorGrateThree-hour-rateddamperswereprovidedforthegrateinthefloorofFireZone33toFireArea8belowbeforesubmittaloftheMarch1983AppendixRreport.7.8.5.2PenetrationsThepenetrationsthatexistbetweenFireZones33and12willbesealedwithathree-hour-ratedseal.7.8.5.3FireDetectionThefireareawillbeprovidedwithanautomaticfiredetectionsystemthatwillalarmintheUnit1ControlRoom.Page7-54 I7.8e6ConclusionBasedonthepreviousanalysisanexemptionisrequestedfromtherequirementthatafixedsuppressionsystembeinstalledinareaswherealternateshutdowncapabilityexistsasrequiredbySection'III.G.3ofAppendixR.exemptionaresummarizedasfollows:Thebasesthatjustifythe(2)(3)Affectedcomponentsinthefireareahavealternateshutdowncapability.Thecomponentsofconcernarehorizontallyseparatedbygreaterthan100ft.Thefixedcorn/ustihleloadinginthefireareaisunder27,000Btu/ftwithanequivalentfireseverityoflessthan20minutes.(4)PenetrationsbetweenFireZone33BandFireZone12havebeensealed(seeSubsection8.4.3).Engineeringevaluations,havebeenperformed-inSubsections9.23,,9.29,9.35and9.38tojustifyunprotectedopeningstoadjacentfireareas.Anexemption-(seeSubsection7.14)wasrequestedandgrantedforunratedseismicgapsbetweenFireZones33,33Aand33BandtheCon-tainmentstructure.(5)Themodifications.requiredtomeetSectionIII.G.3wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.Page7-55 SUMMARYEVALUATIONTABLE7.8-1FIREZONES:33,33A,33Band105DESCRIPTION:Unit1EastMainSteamValveEnclosureandContractorAccessControlBuildingEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstruction-a.WallsNorth-metalcladexteriorwallSouth,-reinforcedconcrete,inexcessofthree-hourratingEast.-reinforcedconcrete,inexcessofhourratingWest-reinforcedconcrete,inexcessofhourratingthree-three-b.Floor-.reinforcedconcrete,inexcessofthree-hourratingc.Ceiling-reinforcedconcrete,inexcessofthree-hourrating2.Ceilingheight-Approx.68ftforFireZone3331ft8in.forFireZone33A24ft6in.forFireZone1058ft6in.forFireZone33B3..Area-,7236ftZonesvolume-Approx.206,5l8ft35.6.Ventilation-FireZone33-47,750cfmFireZones33Aand33B-4000cfmFireZone105-1250cfmAccessinZone-EquipmentformspartialobstructionPage7-56 SafeShutdownEquipmentMPP-210,211,212,240,241,242-SGPressureTransmittersMRV-213,243-SGPowerOperatedReliefValvesSV-1,2,3,-SafetyValvesFMO211g212241I242SGSupplyMOVsLSI-1-LocalShutdownStationFireHazards2.3.Typeofcombustiblesinarea-CableinsulationCharcoalCellulosicsClassBsolventsPlasticsRubberTotalfixedcombustibleloadingconsideredforthepurposeoftheanalysis-27,000Btu/ft4Actualquantityoffixedcombustibles-Cable-25,446,125BtuCharcoal-2,145,000BtuCellulosics-31,019,871BtuClassBsolvents-3,102,000BtuPlastics-18,486,386BtuRubber-3,259,875BtuTOTAL-'1,533Btu/ft2ExistingFireProtection2.FireDetectionSystems-,ThermistorheatdetectionforthecharcoalfilterunitFireExtinguishingSystems-ManualdelugewatersprayforthecharcoalfilterunitManualhosestationsandportableextinguishers(ABC,Purple-KandC02)availableAutomatic.wetpipesprinklersinFireZone105Page7-57 7.9FireArea3434A,34B,Unit2EastMainSteamValveEnclosureEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptions,fromthespecificrequirementsof-.AppendixR,SectionIII.G.3,i.e.,afixedfiresuppressionsystemshallbeinstalledinthefirearea.7.9.1FireAreaDescritionFireArea34,34A,34BislocatedimmediatelyoutsidetheContainmentBuildingofUnit2atanelevationof612ft.ThisfireareaistheUnit,2counterpartto,FireArea33,33A,33B.Theareaincludesthesouthareaaroundcontainmentthatcontainsmainsteamlines.andalso,.includesthenonessentialservicewaterllvalvegallery.onthewestside'directlyoppositetheEastMain1SteamValveEnclosure..',Pertinent"dimensionaldataiscontainedin.Table7.9-1,FireArea34,34A,34B.EvaluationParametersSummaryandFigure7.9.7.9.2SafeShutdownEuimentFireArea34,34A,34Bcontainsallmainsteampressure,transmittersforsteamgenerators1and4,theelectro-pneumatictransmittersforallfourUnit2generatorpoweroperatedreliefvalves,steamgenerators.1and4auxiliaryfeedwaterinletvalves(FM0-211,212,241,242),thelocalshutdownindicationpanel(LSI-1)andthepoweroperatedreliefvalvesandsafetyforsteamgenerators1and4.Themainsteamvalvesforsteamgenerators1and4arealsointhearea.Page7-58 7.9.3FireProtectionSstemsFireArea34,34A,34Bhasnoautomaticsuppressionsystem.Athermistordetectionsystemandmanualwaterdelugesuppressionsystemisinstalledforthecharcoalfilterslocatedinthearea.Theareaalsohasamanual75ftl-l/2in.hosestationandCO2fireextinguishers.7.9.4FireHazardsAnalsisTheinteriorwalls,floorsandceilingsareofreinforcedconcreteconstruction.Excludingdoorsandmetalwalltotheexteriorofthearea,theseismicgapsbetweenFireZones34,34A,34BandContainment,openhatchtoFireZone117below,steelgrateinthefloorofFireZone.34toFireZone26,andnumerouspenetrationsofthewall.'betweenFireZone34AandFireZone109,all.barriershavea-minimumfirelatingofonehour.Engineeringevaluationsorexemptionrequestshavebeenperformedorgrantedjustifyingtheseunratedportionsoftheareaboun-daries(seeSubsections7.14and9.36).PenetrationsexistbetweenFireZone34BandFireZone22andwillbe'ealed.TheanalysisindicatedthepresenceofallfoursteamgeneratorpoweroperatedreliefvalveEPTsinthearea.Thetransmittersaregreaterthan100ftapart;however,alternateshutdowncapabilitieswillexistforthisareawiththeproposedmodificationstothesteamgeneratorPORVs.Page7-59 Thefixedcombustibleloadingoftheareaisunder20,000Btu/ftwithanequivalentfireseverityoflessthan15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare5909Btu/ftand4.3minutes,respectively.)7.9.5ProosedModificationsTheonlyredundantcomponentsintheareanecessaryforsafeshutdownaretheEPTsforthefoursteamgeneratorPORVs.TheEPTsandtheirassociatedcablesareover100ftapart.ShouldafireaffectbothtrainsofsteamgeneratorPORVs,onedivision.willbe"operableoutsidetheareaatalocalcontrolstation."7.9.5..1FloorGrateThree-hourfire-rated,damperswereprovidedforthegrateinT,",.thefloorofFireZone34.toFireZone26belowbeforesubmittal'oftheMarch-1983AppendixRreport.7.9.5.2PenetrationsThepenetrationsthatexistbetweenFireZones34Band22willbesealed.7.9.5.3FireDetectionThefireareawillbeprovidedwithanautomaticfiredetectionsystemthatwillalarmintheUnit.2ControlRoom.7.9.6ConclusionBasedonthepreviousanalysis,anexemptionisrequested4fromtherequirementthatafixedsuppressionsystembeinstalledPage7-60 inareaswherealternateshutdowncapabilityexists,asrequiredbySectionIII.G.3ofAppendixR.Thebasesthatjustifytheexempt-ionaresummarizedasfollows:(1)Affectedcomponentsinthefireareahavealternateshutdowncapability.(2)(3)Thecomponentsofconcernarehorizontallyseparatedbygreaterthan100ft.Thefixedcornustibleloadinginfireareaisunder20,000Btu/ftvithanequivalentfireseverityoflessthan15minutes.(4)PenetrationsbetweenFireZone34BandFireZone22havebeensealed(seeSubsection8.8.3).EngineeringevaluationshavebeenperformedinSubsections9.24,9.36and9.38tojustifyunprotectedopeningstoadjacentfireareas.Anexemption(seeSubsection'7.14)wasrequestedandgrantedforunratedseismicgapsbetweenFireZones.34,.34A,and34BandtheCon-tainmentstructure.(5)ThemodificationsrequiredtomeetSectionIII.G.3wouldnotsignificantlyenhancefireprotectionsafety'boveth'atprovidedbypresentcommitments.Page7-61 SUMMARYEVALUATIONTABLE7.9-1,FIREAREA:34,34A,34BDESCRIPTION:Unit2EastMainValveEnclosureEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstructiona.WallsNorth-reinforcedconcrete,inexcessofthree-hourratingSouthEast:metalcladexteriorwallreinforcedconcrete,inexcessofthree-hourratingWest-reinforcedconcrete,inexcessofthree-hourratingb.Floor-reinforcedconcrete',inexcessofthree-hourratingc.Ceiling-reinforcedconcrete,inexcessofthree-hourrating2.Ceilingheight-Approx.68ftforFireZone3431ft8in.forFireZone34A8ft6in.forFireZone34B3.Area-4856ft4.Areavolume-Approx.177,660ft35.Ventilation-FireZone34-4900cfmFireZones34Aand34B-4000cfm6.AccessinZone-EquipmentformspartialobstructionPage7-.62 B.SafeShutdownEquipmentMPP-210,211,212,240,241,242-SGPressureTransmittersSV-l,2,3,-SafetyValvesMRV-213,243-SGPowerOperatedReliefValvesFM0-211,212,241,242-SGSupplyMOVsLSI-1-LocalShutdownStationO.C.FireHazards'1.Typeofcombustiblesinarea-CableinsulationCharcoalCellulosicsClassBsolventsPlasticsRubber2.Totalfixedcombustible.loadingconsideredforthepurposeoftheanalysis-20,000'Btu/ft3.,'ctualquantityoffixed.combustibles-Cable-11,993,276BtuCharcoal-2,145,000BtuCellulosics.-5,483,200BtuClassBsolvents-3,102,000BtuPlastics-2,233,550BtuRubber-3,754,023BtuTOTAL-5909Btu/ftD.ExistingFireProtectionFireDetectionSystems-Thermistorheatdetectionforthecharcoalfilterunit2.FireExtinguishingSystems-ManualdelugewatersprayforthecharcoalfilterunitManualhosestationsandportableextinguishers(ABC,Purple-K,andC02)availablePage7-63 7.10FireZone44SAuxiliarBuildinSouth,Elevation609ft,BothUnitsEXEMPTIOHREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionfromAppendixRSectionIII.G.2;i.e.,enclosureofcableandequipmentandassociatednonsafetycircuitsofoneredundanttraininafirebarrierhavingaone-ho'urrating.7.10.1FireZoneDescritionFireZone44Sis"thesouthhalfofelev'ation"609'toftheAuxiliaryBuilding,thathas'eenartificiallysegmentedforthepurposesofthe.analysisat..approximately120ftfromthesouthwall.Thenorth"halfofthe-firezone(44N)"containsonlyUnit1safeshutdown"equipment,'nd.cablesandhasalternateshutdowncapability',usingUnit'2,systemsandcomponents.FireZone44SIcontains'predominantlyUnit2safeshutdowncables.However,fivecomponentcoolingwaterpumps(1PP-10E1PP-10W,2PP-lOE,2PP-10Wandthesparepumpusableforeitherunit)arelocatedintheextremesouthendofthefirezone.TheCCWpumpsaremountedonpedestalswithconcretecurbscompletelysurroundingt'epedestals.,Thecurbsare"s'ixincheshighandthepedestalsearefourincheshigh.TheflooraroundeachoftheCCWpumpsiscurbedinsuchamannerthatoilleakingfromanyonepumpormotorwillbeconfinedbytheboundaryofthecurbing.Thustheoilisnotallowedtopoolandflowtowardsand/ordirectlyPage7-64 aroundtheadjacentCCWpump.Ventilationsupplyductsarelocatedovereachmotorthatcompletelyumbrellathepumpmotors.NormalaccessintotheareaisthroughthenorthendofFireZone44N,throughtheAuxiliaryBuildingaccesscontrolarea;BothUnit1andUnit2CCWpumpsarenormallyalignedtotheirrespectiveunitsduringfullpoweroperation'.Thesparepumpisavailableforusewitheitherunitduringmaintenanceofoneof.thenormalpumpsbyelectricallyconnectingthepumpandmanuallyaligningthevalves.Thecenterlines'feastandwestpumpmotorsforbothunitsareseparatedbyapproximately13ft..TheUnit1eastandUnit2westpumpsatthemotorendbearings,(closest-points)areseparatedbyapproximately5ft5in.,while-the.Unit1westpumpmotor,onadiagonal,toUnit2westpumpmotorisseparatedbyapproximately16ft6'n.Thefive,CCWpumpsarealllocatedwi,thinasectionofFireZone44Sapproximately35ftby35ft.TheUnit2CCWheatexchangersrunnorthandsouthandareapproximately12ftnorthoftheUnit1eastpumpandseparatedfromeachotherbyapproximately7ft.TheheatexchangeroutletvalvesCMO-410andCMO-420arelocatedatthenorthendoftheUnit2CCWheatexchangersapproximately75ftfromthesouthwallofFireZone44S.Afour-footwideventilation'uctrunseastandwestbetweenUnit1andUnit2CCWpumpsapproximately10ftoffthefloor.Sub'section9.3presentstheengineeringevaluationperformedtoPage7-65 justifytheHVACductpenetrationtoFireZone52above.PertinentdimensionaldataforFireZone44SisgiveninSummary'EvaluationTable7.10andFigures7.10.1,7.10.2,7.10.3,and"7.10.8.7.10.2SafeShutdownEuimentFireZone44ScontainsallfourCCWpumps.forUnits1and2,thetwoUnit2CCWheatexchangers,theCCWpumpsuctionvalves(onlyrequiredforRCPthermalsealreturntoCCWpumps),Unit2CCWheatexchangeroutletvalves,Unit2CCWcommonserviceheadervalves,Unit2'ESW:toCCWheatexchangerinlet,Unit2ESW<toCCWheat;exchangeroutletandUnit2MCC2-AZV-A.Thespare>'CCWpumpisalso,i:nFireZone44S.With;the..exception'f'hecomponentcoolingwaterpumps1PP-10Eand1PP-10W,thereareno,'nit1cablesorcomponentsin">FireZone44Sthatareessentialforsafeshutdown.Thus,for~mostsystems,Unit1isavailableforalternateshutdowncapability.Proposedfireprotectionmodificationswillprovideavailabilityofallfouremergencydiesels,allfouressentialservicewaterpumpsandatleasttwoofthefourcomponentcoolingwaterpumps.TheremainingsystemsofUnit1usedfor"alternateshutdowninUnit2areoutsideofthisfirezoneandfreeoffiredamage.7.10.3FireProtectionSstemsFireZone44Shaspartialareaautomaticdrypilotpreactionsuppressionsystemandfullareaionizationdetection.ManualPage7-.66 suppressionsystemsincludeten20lbABCdrychemicalandten15lbC02fi'reextinguishers;threeCO2hosereelswith150ft1in.hosesandthreewaterhosereelswith75ftl-l/2in.hoses'quippedwithadjust'ableanglespraynozzles.Thefirezoneisalsoequippedwith20ionizationdetectors.7.10.4FireHazardsAnalsisThefixedcombustibleloadingoftheareaisunder33,000Btu/ft,foranequivalentfireseverityoflessthan25minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare19,192Btu/ftand14.2minutes,2respectively.)Thecombustibleloadingisapproximately52<fromcableinsulation,12<fromcellulosics,33<.fromplasticsandrubber,and3~ClassBflammableliquidcombustiblesinthefirezone.Therearenospecificareasofthe.,firezonethatcontainhighconcentrationsoffixedcombustibles.ThearrangementoftheCCWpumpsandheatexchangersispresentedinFigures7.10.1and7.10.2.Thepowercablesforthepumpsareruninconduitinthefloorslabandenterthefirezonethroughthefloorinto.thepumppedestalattheterminationpointofthemotors.Nopumpcontrolcablesarelocatedinthefirezone.The"overheadareaabovethepumpsis.essentiallyfreeoffixedcombustiblesasthecabletraysinthefirezonerunnorthandsouthtotheeastandwestofthepumps.Page7-67 TwoceilingelevationsexistinFireZone44S.Theclearfloortoceilingheightoverthecomponentcoolingwaterpumpsis10ft11in.,withthatovertherestofthefirezonebeing20"ft4in.Figure7.10.4isaplanandelevationviewoftheceilingheightsinthevicinityofthecomponentcooling.waterpumps.Duetothechangeinceilingelevations,theproductsofcombustionfromafireinthevicinityofthepumpswouldtendtoflowupintothe20ft4in.highceilingspace.Thiswillpreventastratifiedlayerofhotgasesfromformingto-adepthsufficienttodamagethecomponentcoolingwat'erpumpsunaffected'bythedirectresultsofthefire.Openstairways.provideaccess.fromthe591ftand633ftelevationstoFireZone44Sonthe609ftelevation.'ccessto'thecomponentcoolingwater.areaofFireZone44Sisopenandunobstructedtherebyensuringadequatefirebrigaderesponsefor>manualfirefightingpurposesshouldtheneedarise.7.10.5ProosedModificationsThefirehazardsanalysisrevealedthepumpsandheatexchangerswithassociatedcomponentsdonotcomplywithAppendix-RandasaresultFireZone44Swillbeupgradedwithfireprotect.ionmodifications.~.7.10.5.1WaterSuressionSstemTheentirefirezonewillbeprotectedbyextendingtheexistingautomaticdrypilotpreactionwatersuppressionsystem.ThesystemwasextendedinFireZone44StoprovideareacoveragePage7-68 overthebearings,Units1and2CCWpumps,directlyovertheCCWpumpandoverthemonitortankarea.Thegeneraldesigncriteriafortheinstallationisasfollows:(2)(3)Thesprinklerheadsshallbepositionedinsuchamannerthattheywilladequatelycontroland/orextinguishafirethatcouldoriginateontheflooroftheprotectedareaandcauseanexposuretoconduits,pipingand/orequipmentrequiredforsafeshutdown.Thedesignofthesprinklersystemshouldconsiderthefiretoinvolvetransientcombustibleandexternalignitionsourcesandnotbecausedbyelectricallyoriginatedfiresinoverloadedcables.Suppressionwillconsistbfceiling-mountedsprinklersinaddition,to.sprinklerslocatedfordirectwaterapplicationontotheCCWpumpbearings.Theceiling-mountedsprinklersprovide,.area-coverageovertheCCWpumpsandpillprovideadesigndensityontheorderof0.4gpm/ft.RefertoFigures7.10.5and7.10.6forplanandelevationviewsof"thedrypilotpreactionsuppressionsystem'fortheCCWpump"area.(4)'hesprinklersystemsshall,-besupported'seismically.wherenecessaryandanalyzed-forinadvertentoperationoractuation.~'l,I(5)ThesprinklersystemsshallbeapplicableportionsofNFPA13-1978.designedtothe.(6)(7)Heatcollectors,whereapplicable,shallbeinstalledtoassurereliablesprinkleractuation.Safety-relatedequipmentisrequiredtobeprotectedfrominadvertentsprinkleroperationthatcouldrenderequipmentinoperableduetowaterspray.Drainagecapabilityinthevicinityofthepumpsconsistsofdrainopeningsoneachofthefivepumppedestalsandagridof4-inchdiameterdrainscoveringtheentirefloorareaofFireZone44S.Adequatecapacityisprovidedfordrainageofsuppressionwaterresultingfromafireinthiszone.Page7-69 7.10.5.2FireBarrierAfirebarrierofsteelconstructioncoatedwithasublimingmaterialwillbeprovidedbetweentheUnit1andUnit2pumps.ThisbarrierwillbelocatedbeneaththeexistingHVACductworktoapproximately6ft6in.ThebarrierwillalsoextendnorthbetweentheUnit1eastpump'ndthesparepump.(SeeFigure7,.10.3.).Figures7.10.7and.7;10.8aredraftplanandelevationviews.oftheproposedbarrier.Thebarrierwillbeseismicallyqualifiedandconstructedoftwoapproximately3/4-in.thickTSIThermolagpanels,oneoneithersideof1/4--in.expandedmetal.The.TSIpanelswillbeoverlappedtoprovideprotectionforthebpltsattaching.the.panelsto'themetalstuds(seeFigure7,.10.9).7..10.5.3FireDetection,The,area.willbeprovidedwith"expandedcoverageofboththeautomaticdrypilotdetection'.,systemassociatedwiththepreactionsprinklersystemand.thearea,ionizationdetectionsystem.Thedrypilotdetectionwillconsistofpilotsprinklerheads(whichfunctionasheatdetectors)locatedovertheCCWpumpsandthroughoutthenormallyaccessibleareasofthefirezone..RefertoFigures7.10.5and7.10.6forplanandelevationviewsofthedrypilotpreactionsuppressionsystemfortheCCW.pumparea.AdditionalionizationdetectorswillbeprovidedintheareaoftheCCWpumps.Page7-70~

7.5.5.Subsection9.3presentstheengineeringevaluationperformedtojustifytheHVACductworkthatiscommontoallfiveCCWpumps.Pertheresultsofthatevaluation,athree-hour-ratedfiredamperwillbeprovidedatthetopoftheverticalportionoftheHVACductwhereitpenetratesinto.FireZone52above.Subsection7.13presentstheexemptionrequestjustifyingundamperedHVACductspenetratingthroughfloorandceilingslabsofFireZone44S.7.10.6Conclusion.,-"Basedontheprevious.analysis,-exemptionisrequestedfromtherequirementthatcablesand.equipmentofoneredundanttrainbeenclosedinafirebarrierhavinga"one-hour'atingasprescribedbySectionIII.G.2ofAppendix,R."Thebasesthat'-justifytheexemptionaresummarizedasfollows:(1)AfirebarrierwillbeplacedbetweentheUnit1and'.Unit2CCWpumpsandbetweenthesparepumpandthe.Unit1eastpump.Thusmodified,twoofthefouroperationalpumpswillbefreeoffiredamage.(2)TheexistingautomaticsuppressionsystemwillbeextendedtoprovidecoverageofallCCWpumps.(3)AdditionalautomaticdetectionwillbeprovidedfortheCCWpumparea.(4)CCWpumpcablesareinembeddedconduitwiththeexceptionoftheconnectingpigtailatthemotor.(5)Notraystraversetheareaofthepumps.Thefir@zone'asacombustibleloadingofunder33,000Btu/ft4withafireseverityoflessthan25minutes.(6)Thelubeoilinthepumpshasnocredibleignitionsource.Page7-71 (7)Subsection9.3presentstheengineeringevaluationperformedtojustifythecommonHVACductworkrunningfromFireZone52downtoFireZone44SwhereitisdistributedoverallfiveCCNpumps.Pertheresultsofthatevaluation,athree-hour-ratedfiredamperwillbeprovidedatthetopoftheHVACshaftwhereitpenetratesintoFireZone52.(8)Subsection7.13presentstheexemptionrequestjustifyingundamperedHVACductspenetratingthroughfloorandceilingslabsofFireZone44S.(9)Themodifications-requiredtomeetSectionIII.G.2wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.Page7-72 SUMMARYEVALUATIONTABLE7.10-1FIREZONE:44SDESCRIPTION:AuxiliaryBuildingSouth,Elevation609ft,BothUnitsEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstruction-a.WallsNorth-artificialboundary;mowallSouth-reinforcedconcrete,inexcessofthree-hourratingEast-reinforcedconcrete,inexcesshourratingofthree-West-reinforcedconcrete,hourratingb.Floor-reinforcedconcrete,hourratinginexcess,ofthree-inexcessofthree-2.3.4~5.6.c.Ceiling-reinforcedconcrete,inexcessofthree-'ourratingCeilingheight-Variesfrom12ftto20ft4in.Area-9360ft2Zonevolume-159,391ftVentilation-38,000cfmAccessinZone-UnobstructedB.SafeShutdownEquipmentPP-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-Unit2FireHazardsTypeofcombustiblesinarea-CableinsulationLubeoilCellulosicsClassBsolventsPlasticsRubber2.3.Totalfixedcombustibleloadingconsideredforthepurposeoftheanalysis-33,000Btu/ftActualquantityoffixedcombustibles-Cable-92,.796,061.Bt.uLubeoil-3,652,500BtuCellulosics-21,927,000BtuClass.Bsolvents-3,102,000BtuPlastics-36,914,052-BtuRubber-21,266,600BtuTOTAL-19,192Btu/ftExistingFireProtectionFireDetectionSystems-20ionizationsmokedetectors2.FireExtinguishingSystems-DrypilotpreactionsprinklersoverCCWpumps,pumpbearings,monitortanks,andnormallyaccessiblezonelocations'age7-74 7.11FireArea53Unit1ControlRoomEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionfromthespecificrequirementsofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinstalledinthearea.7.11.1FireAreaDescritionFireArea53istheUnit1ControlRoomlocatedonelevation633ftimmediatelyadjacenttotheUnit2ControlRoom.TheUnit1ControlRoomcontainsallthenormalcontrolpanelsforplantoperationandmostrelayandinstrumentcabinetsassociatedwithplantcontrol.Inaddition,'heUnit2hotshutdownpanel(FireZone145)islocatedin.the.southwest,corneroftheControlRoomandisapproximately12ft6in..long,by5ft1in.wide.ThetopofthepanelisapproximatelyeightinchesfromthefalseceilingoftheControlRoom.ThehotshutdownpanelisofsteelM'constructionwithasteeldooratthefrontofthepanel.PertinentdimensionaldataiscontainedinFireArea53SummaryEvaluationTable7.11-1andFigure7.11.7.11.2SafeShutdownEuimentTheUnit1ControlRoomcontainsthecontrolpanels,relay'andinstrumentcabinetsand'associatedcablingforUnitl.TheUnit2hotshutdownpanelisalsointheControlRoom.Page7-75

.7.11.3FireProtectionSstemsFireArea53hasnoautomaticsuppressionsystem.Thereare46ionizationdetectorslocatedintheControlRoomincludingdetectioninandaroundHSD2andabovethesuspendedceiling.LocatedoutsidetheControlRoom,aretwol-l/2in.waterhosereels(75'fteach).withadjustable'spraynozzles.InsidetheControlRoomaresix15lbCO2fireextinguishersandoneBioPacone-hourbreathingapparatus.TwoC02hosereels(100ftand150't)arelocatedoutsidethefirearea.7.11.4FireHazardsAnalsisThehotshutdownpanel.isasteelenclosurewithsteeldoorsacrossthefrontof.thepanel..Noequipment-internaltothepanel-isexposedtothe'directeffects'fanypostulatedroomfaireduringnormaloperationbecauseofthe-normallyclosed'paneldoor.;SeeFigure7.11.for.a,sketch-ofthepanels.TheUni't2hotshutdownpanelislocated-inthe,sectionoftheUnit1ControlRoomthathousesnumerousothercontrol,relayandinstrumentpanelsforUnit1.TheControlRoomareaisprotectedfromotherfirezonesbythree-hour-ratedfloors,ceilingsandwallsexceptforoneunratedceilinghatchandonefloorhatchthatis.unrated..Also,thecommonconnectingdoorbetweentheControlRoomsisunrated.Twoseparateengineeringevaluationshavebeendonejustifyingtheexistingunratedhatchesintheceilingandfloor.SeeSubsections9.5and9.13,respectively,fortheseevaluations.ThecommonconnectingdoorbetweenControlRoomswillbeupgradedtothreehours.TheHSD2panelPage7-76 wasoriginally,installedtocomplywiththerequirementsof10CFR50GDC19andisusedto-provideshutdownfromoutsidetheControlRoomforDesignRfires.BasisconsiderationsotherthanAppendixThefixedcombustibleloadingfortheentireControlRoomisandequivalentfireBtu/ftand21.2severityexistingatthistimeare28,225minutes,respectively.)TheareaneartheUnit2hotshutdownpanelhasfewexposed,cables.as.thecablesenterandexittheunder47,000Btu/ft.foranequivalentfireseverityofunder35tlminutes.(Theactualcombustibleloadingpanelsintheareapredominantlythrough4penetrations.Thus,thereisa:smallcombustiblesintheareaof,theHSD2.thefloorviasealedquantityoffixed1.With'-theexceptionof,small.quantities,of.organic'solvent'sedto.service,theequipment.inthe-room,"notransientCcombustiblesarestored,routed.=throughorusedinthissection~oftheControlRoom.Thislowvolumeoffixedcombustiblescombinedwiththeminimumvolumeoftransientcombustiblesusedintheareacreatesanextremelylowfirehazard.IntheeventofafireintheUnit.lMainControlRoom,theunitcanbesafelyshutdownfromUnit2bytheuseofthe~alternatesafeshutdownmethod.7.11.5ProosedModificationsThefirehazardsanalysisperformedrevealedthattheUnit1-ControlRoomisnotincompliancewithAppendixR.Apostulated-Page7-77 fireintheUnit1ControlRoommayinvolvebothUnit1systemsandcomponentsandtheUnit2HSDpanelthatwouldaffectUnit2systemsandcomponents.AdditionalfireprotectionfeatureswillbeprovidedtoensurethatfiresexternaltotheHSD2paneldonotdamageinternalwiring,andfiresinternaltothepaneldonotspreadoutside.7,',.11.5.1FloorandCeilinHatchesEngineeringevaluationshavebeenperformedjustifyingtheexistenceoftheunratedhatchesinthefloorandceilingoftheUnit1ControlRoom,Fire.:Area53.(See'Subsections-9;"5"and'9.13.)7.*.11.5.2,,ConnectinDoor"Upgradethecommonconnectingdoortoathree-hourrating.S7;:11.5.3,HotShutdownPanelThehotshutdownpanelwillbeprovidedwith'afire"ba'rrier'avinga'nequivalenceofathree-hourfirerating.Theconstructionofthebarrierwillbesuchthataccesstothepanelwillnotbeimpeded;however,thebarrierwillfunctiontopreventfiredamagetoandfromtheHSD2panel.7.11.6ConclusionBasedonthepreviousanalysis,anexemptionisrequestedfromtherequirementthatafixedsuppressionsystembeinstalledinareaswherealternateshutdowncapabilityexistsasprescribedinSectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemptionaresummarizedasfollows:Page7-78 (1)AutomaticdetectionispresentintheareaoftheUnit2HSDpanelandinsidethepaneltoensureearlyIwarningofafireinornearthepanel.(2)Thehotshutdownpanelwillbeprovidedwiththeequivalentofathree-hourfirebarrier.(3)TheControlRoomiscontinuouslymannedandhasportablefireprotectionavailable.(4)ThefixedcombustibjeloadingoftheControlRoomisunder47,000Btu/ftforanequivalentfireseverityoflessthan35minutes.ThefixedcombustibleloadingintheareaneartheHSD2islow.(5)TheamountoftransientcombustiblesallowedintheControlRoomisextremelylowandwillbecontrolled.(6)Theunit.has,,alternate.safeshutdowncapabilityfromUnit2.(7)Subsections9.5and9.13presenttheengineeringevaluationsperformed.tonjustifytheunrated.hatchesinthefloorandceilingofFireZone53.(8)The.connectingdoorbetweenthe.Unit.1and.Unit2ControlRoomswill,beupgradedto,athree-hour-rated.firedoor.,'t(9)Installationofa,fixedsuppressionsystemtomeet,.SectionIII..G.3,wouldnotenhancefire'protection-safetyabovethatprovidedbypresentcommitments.Page7-79 SUMMARYEVALUATIONTABLE7.11-1FIREZONE:53DESCRIPTION:Unit1ControlRoomEVALUATIONPARAMETERSSUMMARYA..AreaDescriptionConstruction-a.Walls-INorthSouthreinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoamireinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoam'ast.-reinforced'oncreteorblock;three-hourrating;openingssealed'withsiliconefoam,'estreinforced'concreteorblock;three-hour.rating;openingssealedwithsiliconefoamb.Floorreinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoam2.3.4.5.6.c.Ceiling-reinforcedconcreteorblockthree-hourrating;openingssealedwithsiliconefoamJCeilingheight-15I,ft7in.Area-4410ft2(Roomvolume-66,150ftVentilation-13,000cfm(normal)19,000cfm(emergency)AccessinZone-UnobstructedPage7-80 B.SafeShutdownEquipmentAllControlPanelsandmostRelayCabinetsforUnit1C.FireHazards1.Typeofcombustiblesinarea-CableinsulationCellulosicsPlasticsRubber2.Totalfixedcombustibleloadingconsideredforthepurposeoftheanalysis-47,000Btu/ft43.ActualquantityoffixedcombustiblesCable-38,534,338BtuCellulosics-53,359,547,BtuPlastics-30,154,925Btu-.,Rubber'-'.-2,435,040BtuTOTAL-28,225Btu/ftD.ExistingFireProtection2.FireDetectionSystems-45ionizationdetectorsFireExtinguishingSystems-Manual6152215lbC02extinguishersBioPacbreathingapparatusinControlRoomBioPacsoutsideinTurbineBuildingCO2hosereels,100ftand150ftwaterhosereelseachwith75ft1-1/2in.hoseandadjustablenozzlesPage7-81 7.12FireArea54Unit2ControlRoomEXEMPTIONREQUESTPertheprovisionsof10CFR50.48(c)(6)and10CFR50.12IndianaandMichiganElectricCompanyrequests"exemptionfromthespecificrequirementsofAppendixR,SectionIII.G.3;i.e.,afixedfiresuppressionsystemshallbeinthearea.7.12.1FireAreaDescritionFireArea54inUnit2isequivalenttoFireArea53inUnit1.FireArea54istheUnit2ControlRoomlocatedonelevation633ftimmediatelyadjacenttotheControlRoom.TheUnit2ControlRoomcontainsall'henormalcontrolpanelsfor1.~plantoperation'ndmostrelayinstrumentcabinetsassociatedwithplantcontrol.Inaddition,theUnit.lhotshutdownpanelr(FireZone144)islocatedinthenorthwestcorneroftheControl7MRoomandisapproximately,"12ft6in.longby5ft1in.wide.ThetopofthepanelisapproximatelyeightinchesfromthefalseUceilingoftheControlRoom.Thehotshutdownpanelisofsteelconstructionwithasteeldooratthefrontofthepanel.PertinentdimensionaldataiscontainedinFireArea54SummaryEvaluationTable7.12-1andFigure7.12.e7.12.2SafeShutdownEuimentTheUnit2ControlRoomcontainsthecontrolpanels,relayandinstrumentcabinetsandassociatedpanelingforUnit2.TheUnit1hotshutdownpanelisalsointheControlRoom.Page7-82 7.12.3FireProtection.Sstems~~FireZone54hasnoautomaticsuppressionsystem.Thereare42ionizationdetectorslocatedintheControlRoomincludingdetectioninandaroundtheHSD1andabovethesuspendedceiling.LocatedoutsidetheControlRoomaretwo1-ll2in.waterhosereels(75fteach)withadjustable,'spraynozzles.InsidetheControlRoomaresix15lbCO2fireextinguishersandone"BioPac"one-hourbreathingapparatus.TwoCO2hosereels(100ftand150ft)arealsolocatedoutsidethefirezone.7.12.4FireHazardsAnalsis'hehotshutdownpanelisasteelenclosurewithsteeldoorsacrossthefrontofthepanel.'oequipmentinternaltothepanelisexposedtothedirect',effectsofanypostulatedroomfireduringnormaloperationbecauseofthenormally.closedpaneldoor.SeeFigure7.12forasketchofthepanels.The'Unit2hotshutdownpanelislocated"in.thesectionoftheUnit2ControlRoomthathousesnumerousothercontrol,relayandinstrumentpanelsforUnit2.TheControlRoomareaisprotectedfromotherfirezonesbythree-hour-ratedfloors,ceilingsandwallsexceptfor(a)oneunratedceilinghatch,(b)oneunratedfloorhatch,'(c)oneundamperedventilationduct,and(d)theunratedcommonconnectingdoorbetweentheControlRooms.Three'separateengineeringevaluationshavebeendonejustifyingtheexistingunratedhatchconfigurationsintheceilingandfloor,Page7-83 andtheundamperedventilationduct.SeeSubsections9.5,9.17and9.2,respectively,for"'heseevaluations.ThecommonconnectingdoorbetweenControlRoomswillbeupgradedtothreehours.TheHSDlpanelwasoriginallyinstalledtocomplywiththerequirementsof10CFR50GDC19andisusedtoprovideshutdown,from.outside.'he:"ControlRoomforDesignBasisconsiderationsotherthan"AppendixRfires.ThefixedcombustibleloadingfortheentireControlRoomisunder47,000Btu/ftforanequivalentfireseverityofunder35minutes.(Theactualcombustibleloadingand-'equ'iva'lent"'fi're'sever,ityexistingatthis..timeare30;069Btu/ft'and22.6Aminutes,respectively.)The'reanearthe.Unit1hotshutdownpanelhasfewexposedcables.asthecablesenterandexitthepanels,intheareapredominantly'hroughthefloorvia'ealedpenetrations..',Thus,there's.asmallquantityoffixedcombustiblesintheareaoftheHSD1.Piththeexceptionofsmallquantities,.oforganicsolventusedtoservicetheequipmentintheroom,notransientcombustiblesarestored,routedthroughorusedinthissectionoftheControlRoom.Thislowvolumeoffixedcombustiblescombinedwiththeminimumvolumeoftransientcombustiblesusedintheareacreateanextremelylowareafirehazard.IntheeventofafireintheUnit2MainControlRoom,theunitcanbesafelyshutdownfromUnit1bytheuseofthe'alternatesafeshutdownmethod.Page7-84 7.12.5ProosedModifications~~~The,firehazardsanalysisperformedrevealedthattheUnit2ControlRoomisnotincompliancewithAppendixR.ApostulatedfireintheUnit2ControlRoommayinvolvebothUnit2systemsandcomponentsandtheUnit1HSDpanel.Additionalfireprotectionfeatureswillbeprovidedto.ensurethatfires'xternalto.theHSDldonotdamageinternalwiringandfiresinternaltothepaneldonotspreadoutside.7.12.5.1FloorandCeilinHatchesEngineeringevaluationshave,beenperformedjustifyingtheexistenceoftheunratedhatchesinthefloorandceilingoftheUnit2ControlRoom,Fire.Area54.(SeeSubsections9.5and.9.17.)~~~7.12.5.2ConnectinDoorUpgradethecommonconnectingdoortoathree-hourrating.7.12.5.3VentilationDuctAnengineeringevaluationhasbeenperformedjustifyingtheexistenceoftheundamperedventilationductbetweentheControlRoomandFireZone73.SeeSubsection9.2forthisevaluation.7.12.5.4HotShutdownPanelThehotshutdownpa'nelwillbeprovidedwithafirebarrier,.havinganequivalenceofathree-hourfirerating.The.constructionofthebarrierwillbesuch.,thataccesstothepanelwillnotbeimpededhowever,thebarrierwillfunctiontopreventfiredamagetoandfromtheHSDlpanel.Page7-85 7.12.6ConclusionBasedonthepreviousanalysis,anexemptionisrequestedfromtherequirementthatafixedsuppressionsystembeinstalledinareaswherealternateshutdown,capabilityexistsasprescribedinSectionIII.G.3ofAppendixR.Thebasesthatjustifytheexemptionare'ummarizedas'follows:(1)Automaticdetection,ispresentintheareaoftheUn'it1HSDpanelandinsidethepaneltoensureearlywarningofafireinornearthepanel.(2)Thehotshutdownpanelwillbeprovidedwithafirebarrierhavingtheequivalenceofathree-hourfirerating.(3)TheControl.Roomiscontinuouslymannedandhasportablefireprotectionavailable.(4)'hefixedcombustib/4'oading'ftheControlRoomisunder47,000Btu/ftforanequivalentfireseverityoflessthan35minutes..'.Thefixedcombustible-loading"in,.theareaneartheHSD1islow.I(5)'The:amount-of*'ransient.combustiblesallowedinthe".Control,Roomisextremelylowandwillbecontrolled.(6)TheunithasalternatesafeshutdowncapabilityfromUnitl.(7)Subsections9.5,9.17,and9.2presenttheengineeringevaluationsperformedtojustifytheunratedfloorandceilinghatchesandtheundamperedventilationductthroughtheceiling.(8)TheconnectingdoorbetweentheUnit1-andUnit2ControlRoomswil.l,beupgradedtoathree-hour-ratedfiredoor.(9).Installation,offixedsuppressionsystemstomeetSectionIII.G.3wouldnotenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.Page7-86 SUMMARYEVALUATIONTABLE7.12-1FIREZONE:54DESCRIPTION:Unit2ControlRoomEVALUATIONPARAMETERSSUMMARYA.AreaDescriptionConstruction-'a.WallsNorth-reinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoamSouth.-reinforcedconcreteorblock;three-'hourrating;openingssealedwithsiliconefoamEast..-,reinforced,concreteorblock;.three-hour,rating;.-openingssealed,with:siliconefoamWestQjjjreinforcedconcreteorblock;three-hour;rating;openings.sealedwithsiliconefoamb..Floor-reinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoamc.Ceiling-reinforcedconcreteorblock;three-hourrating;openingssealedwithsiliconefoam2.3.5.6.Ceilingheight-15ft7in.Area-4410ft2Roomvolume-66,150ft3Ventilation-13,000cfm(normal)19,000cfm(emergency)AccessinZone-UnobstructedPage7-87 B.SafeShutdownEquipmentAllControlPanelsandmostRelayCabinetsforUnit2C.FireHazards1.Typeofcombustiblesinarea-Cableinsulation-CellulosicsPlastics,Rubber2.Totalfixedcombustibleloadingconsideredforthepurposeoftheanalysis-47,000Btu/ft~3.Actualquantityoffixedcombustibles-Cable-54,843,131BtuCellulosics-50,875,516BtuJJPlastics--26;294,425BtuIJI*.Rubber-596,400Btuj'ITOTAL-30,069Btu/ft2D.ExistingFireProtection4T1.FireDetectionSystems2.41ionizationdetectorsFireExtinguishingSystems-Manual62215lbCO2extinguishersCO2hosereels,100ftand150ft,outsideroomwaterhosereelseachwith75ft1-1/2in.hoseandadjustablespray.nozzlesBioPacone-hourbreathingapparatusinControlRoomBioPacsoutsideinTurbineBuildingPage7-88

-7.13AuxiliarBuildinHVACDuctPenetrationsEXEMPTIONREQUESTPertheprovisionsof10CFR50.48and10CFR50.12IndianaandMichiganElectr'icCompanyrequestsexemptionfrom.therequirementsofAppendixR;i.e.,fire-rateddampersshallbeinstalledinthefireareaboundaries.Thisanalysishasbeencompletedtoprovidetechnicaljustificationfornotinstallingfiredampersintheventilationsystemductpenetrationsthatcommunicatebetweenfireareasverticallyfromelevationtoelevation.Theventilationductsassociatedwiththe22penetrationswerelocatedonHVACdrawingsshowingtheentire,flowpathofeachduct.,Penetrationsintozones/areasequippedwithrated:firedamperswereeliminatedandwhatremainedisdepictedon.Figures7..13-1through7.13-8.,Theregistersinthe.remainingducts'werelocatedwiththedirectionofthearrowsoneachdefining'hetheritissupply(~g)orexhaust(PPt).EachfigurerepresentstheelevationsoftheAuxiliaryBuildingshowingbothunits.Thecirclednumbers-onthefiguresrepresentfirezones/areasfoundandthenumbersnexttothearrowsindicatetheregisternumberfoundincorrespondingTables'.13-1through7.13-6.Onlythefirezones/areascontainingtheductingofconcernarerepresentedonthefigures.Thefiguresareletter-codedtoidentifythefirefareainvolvedanddefinedattheboundarieswiththeuniquemarkings.FordetailedboundariesofeachfireareaorzoneandPage7-89 Jspecificgeneralarrangementdrawings,refertoSection2,Figures2.1through2.11of'thisreport.Figures7.13-1through7.13-8aremeanttoindicatethepresenceoftheductorregisterinafirezone/areaandnottoprovidespecificlocationswithinthezone/area.Tables7.13-1through7.13-6identifythespecific.American.ElectricPowerServiceCorporationHVACdrawingnumberanddrawingcoordinates-tolocatetheregisters.The22ductpenetrationsandassociatedregisterswereevaluatedindividuallyasdepictedonthefigures.Theregisterswithinazone/areawereevaluat'edwithrespectto'-safe<shutdown'omponentandcircuitlocations..TheMarch1983submittalconsideredfire'amageto""safeshutdown"systems,'omponents'.andci-rcuits,withinareasand,zones..'.Thissameinformat-ion"willbeutilized.as.,appropriate=to'.resolve'ssues'rising>fr'omtheregister.locationswithina.'firezone/area.'hegeneralapproachwasto1)-considerthe.effectonSectionIII.G.2compliance;i.e.,evaluatethedamagetoredundantsafe..shutdownequipmentand/orcircuits,and2)considertheeffectonSectionIII.G.3;i.e.,evaluatedamagetoalternateshutdownequipmentand/orci,rcuits.Thus,whereanindividualductcommunicatedwithdifferentzonesor.areas,theductpenetrationsandregisterswereevaluatedtodeterminetheimpactonthetwocases'justdescribed.Both'asesconsiderarea/zonecommunicationbetweenelevationsandatthefirearea/zoneboundarieswheretheductpenetrationwasnotprovidedwithafiredamper.TheimpactofPage7-90 ductsandregistersonsafeshutdownalsoconsidersthelocationofsuppressionanddetectionsystems,theamountofcombustiblematerialinthezone/area,andparticularlytheprovidedmethodofsafe.shutdownasdescribedintheMarch1983submittal.Thestairwayscommunicatingbetweenelevationshavebeenprovidedwith'automaticsuppression,systems-tomaintainelevationsasseparatefireareas.Themechanicalandelectricalceiling/floorpenetrationsarebeingprovidedwithsealsinaccordancewiththeMarch1983submittal.Thecombustible.;loadingvaluesandsurfaceareaspresentedaregivenfortheentirefirearea..Plantwalkdownshavebeenperformed.andphysicalraceway=locationdrawingshavebeerrevaluatedtodeterminethatthe.combustibleloadinginthefire'reasevaluatedisuniformly.distributedthroughthe'area.'ireareascontainingconcentrated.combustibleswill,bespecificallydiscussedintheevaluationofthearea.EvaluationofFiure7.13-1TheexhaustductrepresentedonthisfigureisdesignedtoremovewarmairfromvariousareasofUnit1anddischargestotheairshaftatthenorthendofFireZone44.Thisfigureshowstwoductpenetrations(30in.x26in.and72in.x30~in.).Thefollowingsummarytablesfeaturesandsafeshutdowncomplianceprovidethefireprotection<methodsforthezones/areas'fconcern.Page7-91 oFireprotectionfeaturesIIFireArea/ZoneIIl.IIII(,I6Nl).DetectionIonization.DetectorsIonizationDetectorsAutomaticPreactionSprinklerI'IISuppressionIAutomaticSuppressionlSysteminStairwayonly6MIonizationDetectorsAutomaticPreactionSprinkler44NIIonizationDetectorsIIAutomaticPreactionSprinkleroSafeshutdowncompliancemethodsIFireArea/ZoneI'ompliance,MethodsUf4Cablesrequiredforsafeshutdownarebeingprovided,withfirewrapping.II.I6M6NOnedivisionofredundantsafeshutdowncablesforeachunitisbeingprovidedwithfirewrapping.Modificationsarebeingimplementedtoprovidealternativeshutdowncapability.I44NIIModificationsarebeingimplementedtoprovidealternativeshutdowncapability.Page7-92 AsshowninFigure7.13-1,theairshaftextendsuptothe633ftelevationwheretheexhaustfans,creatinganegativepressureintheairshaft,expelthewarmairtotheatmosphere.FireZone1,onthe573ftelevation,isaportionofFireAreaAthatalsocontainsFireZoneslAthrough1H,136,137,138A,138B,and138C.Thesafeshutdowncomponentswithinthisarea(RHRpumpsandassociated,cables)willbeprotectedfromfireasdefinedintheMarch1983submittal.Theventilationductregistersinthisarea,asshownonFigure7.13-1,arelocatedwithin"thenorthsectionofFireZone1,whichonlycontainsR8Rpumpcables.ThecableswithinFireZone1requiredforsafeshutdown(RHRpumppowercables)arebeingprovidedwithfirewrappingandthuswouldnotbe.affected,by.hot.gasesor.than15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare4079Btu/ftand2.9minutes,respectively.)Theareaalsocontainsautomaticdetection.withineachfirezone.Themechanicalandelectricalcombustionproductsfromtheventilationregistersinthisfirezone.Inaddition,,thefireareahasafixedcombustibleloading'funder20,000Btu/ftwithanequivalentfireseverityofless,penetrationsthroughtheceilingtothe587ftelevationaresealedincludingthe30in.x26in.ventilationductexitingFireZone1intoFireZone6N.FireZone6NcontainstheductpenetratingfrombelowasshowninFigure7.13-1.FireZone6Nonthe587ftelevationisPage7-93 aportionofFireAreaB,whichalsocontainsFireZones6A,6M,6S,5,61,64A,64B,65Aand'5B;FireZone6NcontainsmotorcontrolcentersaswellasvariousredundantsafeshutdownsystemcomponentcablesforUnit1.However,FireZone6N,asdescribedintheMarch1983submittal,willbeprovidedwithalternateshutdowncapability..ThezoneisalsoequippedwithautomaticIsuppressionanddetection(enhancedsinceMarch1983submittal).FireAreaBhasafixedcombustibleloadingofunder27,000Btu/ftwithanequivalentfireseverityoflessthan20minutes.(Theactualcombustible-loadingandequiva'lent-fireseverity-existingatthistimeare8947Btu/ftand6.5minutes,respectively.)TheautomaticsuppressionsystemforFireAreaBcontains.approximately168'sprinkler.heads.'thatprovide'coverageforapproximately'23,600ft.',Five'ofthesprinklerheads'arelocated':within'.a'.,tenfoot'ylindricalradius'of-theductpenetrationthrough;the,floor,andadditionalsprinklersarelocatedinthevicinityoftheregistersandremainingductwork.Thefireareaalsocontainsapproximately36ionizationtypedetectors.Theregistersintheareawiththeexceptionofregister5arealllocatedinthenorthsection(FireZone6N).Register5islocatedinfireZone6M,whichcontainsredundant-safeshutdowncircuitsand.thathasbeenprovidedwithfirewrappingprotectionofoneredundantdivisionforeachunitasidescribedintheMarch1983submittal.FireZone6Misalsoprovidedwithautomaticsuppressionanddetection.ThesesystemsPage7-94 inconcertwithinstalledfirewrappingprovideadequateprotectionfromhotgasesandcombustionproductspotentiallytransmittedthroughtheventilationsystem.FireZone6Nisprovidedwithsealsinthemechanical'andelectricalceilingpenetrationstothe609ftelevation,includingtheventilationductex'itingintoFireZone44N.FireZone44N,locatedonthe609ftelevation,isapartoftheFireAreaC,whichalsocontainsFireZones43,44S,44Athrough44H,and37.Fi'reZone44Ncontainsmotorcontrolcentersandvarious~redundantcablesofsystemsrequiredforsafeshutdown.AsindicatedonFigure7.13-1,alltheregistersarelocatedinthenorthend.Thelargeduct(72in'.x30in.)pene-'ratingthefloorfromthe-587.ftelevationhasse'ven'sprinklerheadsat-the609ftelevation,withinaten-footcylindrical"radiusofthepenetration.In,total,FireAreaC,hasafixed~combustibleloadingofunder47,000Btu/ft'withanequivalent'ireseverityof.35minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare34,482Btu/ftand25.8minutes,respectively.)FireAreaCcontainsapproxi-mately240,sprinklerheadscoveringanareaofapproximately26,261ft.Theareaalsocontainsapproximately30ionization2typedetectors.Adequatecoveragefortheductandtheregistersisprovidedbythesefireprotectiondevicestoensureadequate'rotectionfromhotgasesandcombustibleproductspotentiallytransmittedthrough'theventilationsystem.Inaddition,FirePage7-95 Zone44Nwillbeprovidedwithalternateshutdowncapability.AsindicatedinTable5-2inSection5oftheMarch1983submittal,bothFireZones6Nand44Nhave.thesamesystemsandcomponentspotentiallyaffected.Thusthecommunicationofthetwozonesdoesnotaffectthecompliancestrategynorthesafeshutdowncapability.EvaluationofFiure7.13-2Figure7.13-2hasasimilarductconfigurationasFigure7.13-1,butrepresentsUnit2.Thisfigurerepresentstwoductpenetrations(25in.x"28in."and36in.x24in.).Thefollow-ingsummarytablesprovidethefireprotectionfeaturesandsafeshutdowncompliance,methodsforthezones/areasofconcern.o'ireprotectionfeaturesI"I..FireArea/Zone,III...I'IIIIIIIIIIIDetectionIonization,DetectorsIonizationDetectorsIonizationDetectorsIonizationDetectorsSuppressionAutomaticSuppressionlintheStairwayonlyAutomaticPreactionSprinklerAutomaticPreactionSprinkler'utomaticPreactionSprinklerPage7-96 oSafeshutdowncompliancemethodsFireArea/ZoneComplianceMethodsCablesrequiredforsafeshutdownarebeingprovidedwithfirewrapping.Modifications.arebeing:implementedtoprovidealternativeshutdowncapability.6MOnedivisionofredundantsafeshutdowncablesforeachunitisbeingprovidedwithfirewrapping.44SModificationsarebeingimplementedtoIprovidealternativeshutdowncapability.IThefirezonesarelocatedwithinthefireareaspreviously~,describedintheFigure,7.13-1,.evaluation,so,.combustible-1loadingsandfireseveritiesarethesame.'he573ftelevationVisthesameastheUnit1side,includingthecableandcomponentWconfiguration.TheHUACsystemconfigurationonthe587ftelevation*'is'si'milartoUnit1.FireZone6SwillbeprovidedwithalternateshutdowncapabilityandcomplianceinFireZone6MisdescribedintheFigure7.13-1evaluation.Thepenetrationthroughthefloortothe587ftelevationwithinFireZone6Shasonesprinklerheadtoprovidewatersuppressionintheimmediatevicinityoftheverticalrun.Thepenetrationareaofthe36in.x24in.ductisprotectedbyfoursprinklerheadsinFireZone44SwithinatenfootcylindricalPage7-97 radiusoftheducttopreventductrelatedfiredamage.Also,FireZone44Swillbeprovidedwithalternateshutdowncapabilitywiththeexceptionofthecomponentcoolingwaterpumpsthat,asdescribedintheMarch1983submittal',areprotectedtoensureEltheavailabilityofatleasttwoCCNpumpsforsafeshutdown.1EvaluationofFiure7.13-3-*,Figure7.13-3hasa.similarconfigurationasFigure7.13-2,but,thisfigurerepresentsasingleductwithtwopenetrations(each44in.x24in.).Thefollowingsummarytablesprovidethefireprotectionfeaturesandsafeshutdowncompliancemethodsforthezones/areasofconcern.,o..FireprotectionfeaturesII,,FireArea/ZoneI",Detection,.Suppression"46SIonization.DetectorsAutomaticPreactionSprinkler44$52IonizationDetectorsIonizationDetectorsAutomaticPreactionSpr"i"nk1erIIIAutomaticPreactionISprinklerIIPage7-98 oSafeshutdowncompliancemethodsFireArea/ZoneComplianceMethods6S'odificationsarebeingimplementedtoprovidealternative.shutdowncapability..Modifications.arebeingimplementedtoprovidealternative-shutdowncapability.Modifications'arebeingimplementedtoprovidealternativeshutdowncapability.II~IIIIIITheductispartofthesupplyventilationsystemcomingfromthe633ftelevationdowntotheindicated'nFigure7.13-3,;oneregis587ftelevation.As,IIter,isonthe'87-ft~,7.13-3evaluationforthiszone.ThepenetrationintheceilingofFireZone6Sisprotectedbytwosprinklerheadslocatedin'he587'ftelevationwithinatenfootcylindricalradiusoftheductpenetration.TheductfromthefloortotheceilingwithinFireZone44Siscontinuouswithnoregisteropenings.AdditionalprotectionisprovidedbyatleastfivesprinklerheadsintheimmediatevicinityoftheductinFireZone44S.Theductpenetratingintothe633ftelevationhasaregisteropeninginthesouthendofFireZone52,whichispartofFireAreaD.ThepenetrationthroughthefloorintoFireZone52has.elevation.inFireZone6S.,",'Theshutdownmethod,;fireprotectionfeaturesandcombustibleloading.are,-describedin.theFigurePage7-99 sixsprinklerheadswithinaten-footcylindricalradiusoftheduct.FireZone52hasalternateshutdownprovisionsforthemainsteamsystemlocatedoutsideFireAreaD,whileallothersafeshutdownsystemswithinFireAreaDhaveatleastoneredundanttrainlocatedoutsidethearea.Coldshutdownsystemsrequiremanualoperationof"valves,thatarealso,locatedoutsideofthearea.FireAreaDhasafixedcombustibleloadingofunder47,000Btu/ftwithanequivalentfireseverityoflessthan35minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare30",778Btu/ftand23'inutes,respectively.).FireArea.Disequippedwithautomaticfiresuppression"anddetection'.and'containsapproximately222sprinklerheadsinFireZone'2andapproximately87sprinklerheadsinFireZone51.Fire.AreaDhas39'ionizationdetectors,including17'in'ireZone52.'hecharcoalfilterunitsinFireAreaDareeachprotectedbyamanualdelugesystem.A$'IthermistorcircuitineachcharcoalfilterunitprovidesalarmannunciationinitsassociatedControlRoom.EvaluationofFiure7.13-4Figure7.13-4representsoneductpenetration(30in.x24-l':in.)andissimilartoFigures7.13-2and7.13-3.TheexhaustductshowncommunicateswithFireZones6Sand44S,andisductedtotheairshaftintheextremesouthendofFireZone44S.TheductinFireZone6Shasregisteropenings,butiscontinuouswithnoregisteropeningswithinFireZone44SandisadjacenttoPage7-100 theductdescribedinFigure7.13-3.ThesprinklerheadarrangementisidenticalforboththeductslocatedatFireZone44SasshowninFigures.7.13-3and7.13-4;therefore,theevaluationperformedinFigure7.13-3appliestoFigure7.13-4.Forfireprotectionfeaturesandsafeshutdowncapabilitycompliancemethods,"referto',the'sectionconcerni'ngFireAreas/Zones6Sand44S.EvaluationofFiure7.13-5Figure7.13-5representstwoductpenetrationsofthesamesize(52in.x24i'".)that.communicatewithFireZones6Nand44N.Thefollowingsummarytablesprovidethefireprotectionfeaturesandsafe.shutdowncompliancemethodsforthezones/areas;.ofconcern.o-FireprotectionfeaturesFireArea/ZoneDetectionSuppressionIonizationDetectorsAutomaticPreactionSprinklerIonizationDetectorsAutomaticPreactionSprinklerPage7-101 oSafeshutdowncompliancemethodsFireArea/ZoneComplianceMethods6NModificationsarebeingimplementedtoprovidealternativeshutdowncapability.44NModificationsarebeingimplementedtoprovidealternativeshutdowncapability.Theexplanationofsafeshutdown,fireprotectionfeatures,andcombustibleloadingsarecontainedintheevaluationofFigure7.13-1.Theductsshownareparalleltoeachother.ThepenetrationsthroughtheceilingofFireZone6Nareprotectedbytwosprinklerheadswithin-.a.16footcylindricalradius,oftheducts.Theseducts,as,showninFigure'7.13-5,arecontinuousinFireZone44Nwith'noregisteropenings.Addition'alprotectionoftheductpenetrationisprovidedbytwosprinklerheadseachoverthepenetrationfromFireZone44Nintothesupply-airplenum.IEvaluationofFiure7.13-6Figure7.13-6representsoneductpenetration(34in.x30in.).Theduct,asindicatedonFigure7.13-6,enterstheauxiliarycablevaultinUnit2thatisequippedwitharatedfiredamper.TheductcontinuesfromtheauxiliarycablevaulttoFireZone52thatisalsoequippedwithafiredamper.ForfireprotectionfeaturesandsafeshutdowncapabilitycompliancemethodsrefertotheprevioussectionconcerningFireZones6S,Page7-102 44Sand52.Theductpenetrationatthe609ftelevationisprotectedbythepresenceofthreesprinklerheadswithina10-ftcylindricalradiusontheGSsideandtwoonthe44Sside.EvaluationofFiures7.13-7and7.13-8Figures7.13-7and7.13-8representatotalof12,ductpenetrations(four45in.x35in.,two40in.x40in.,two36in.x36in.,two22in.x34in.andtwo28in.x34in.),withUnit2beingamirrorimageofUnit1andeachunitcontainingsixductpenetrations.The'ollowingsummarytablesprovidethefireprotectionfeaturesandsafeshutdowncompliancemethodsforthezones/areasofconcern.oFireprotectionfeaturesFireArea/ZoneDetection.SuppressiontIIIonizationdetectorsandThermistorsfoxcharcoalfilterunitI'utomaticdel'ugeforIcharcoalfilterunitI50IonizationdetectorsandThermistorsforcharcoalfilterunitAutomaticdelugeforcharcoalfilterunit69IonizationdetectorsandThermistorsforHVACunitsAutomaticdelugeforcharcoalfilterunitI'"IIIPage7-103 oSafeshutdowncompliancemethodsFireArea/ZoneComplianceMethods.Atleastoneredundantdivisionofsafeshutdowncablesislocatedoutsidethefirearea50Atleastoneredundantdivisionofsafeshutdowncablesislocatedoutsidethefirearea69includingThelocationscontainnosafeshutdowntheHVACvesti-Isystems,componentsorcables.bulesontheI650fteleva-II>tionlI'tThereare'noregisters.oropenings,intheducts.shownonFigures7.13-7and7.13-8;however,they'docommunicatefromFireAreaDinZones49',(Unit1)and50(Unit.2)toFireZone69includingtheHVACvestibules"atthe650ftelevation.Fire+rZones49and50,aspartofFireAreaD,havebeenanalyzed'forsafeshutdownwiththe,SectionIII.G.2compliancemethodspresentedintheMarch1983submittal.FireZone69,includingtheHVACvestibulesonthe650ftelevationandtheareainwhichpPtheyarecontained,hasnosafeshutdownequipmentorcircuitslocatedinthem.FireAreasDandEwerecombinedforthepurposesofthisanalysis.BecauseFireAreaEhasafixedcombustibleloadingofunder20,000Btu'/ftwithanequivalentfireseverityoflessthan15minutes(theactualcombustiblePage7-104 loadingandequivalentfireseverityexistingatthistimeare2998Btu/ftand2.2minutes,'esp'ectively)andcontainsnosafeshutdowncomponentsorcircuits,thecombinationoftheseareasdoesnotchangethemethodofsafeshutdownforFireAreaD.ConclusionsforVentilationDuctPenetrationEvaluationThisanalysishas-beencompletedto,providetechnical1justificationfornotinstallingfiredampersintheventilation'ystemductpenetrationsthatcommunicatebetweenfireareasverticallyfromelevationtoelevation..Thefireprotectionfeatures,e.g.,suppressionanddetectionsystemsand/orthelowcombustibleloadingswithintheseareas,provideadequateassurancethatfiredamagerelatedtoventilationductingwill'Snotimpairsafeshutdowncapability.Themajoremphasis,however,shouldbeplacedonthe.methodofcomplianceandsafeshutdownforeachofthefirezones/areasinvolved.'Thecenterlinefirezonesonthe587ftand609ftelevationswillbeprovidedwithfirewrappingforsafeshutdowncircuits.Thenorthandsouthportionsofbothelevationsarebeingmodifiedtoprovidealternatesafeshutdowncapability.Elevations587,609and633havebeenmodifiedtoprovideadditionalautomaticsuppressioncoverage.Also,theregistersbetweenandwithini,elevationshavebeenevaluatedanddeterminednottocommunicatebetweenredundantsafeshutdowncomponentsorcircuits.Page7-105 Asinglefirestartinginoneofthefireareasofconcernthatiscommunicatingthrough'verticalundamperedductswould*notaffectsafeshutdowncapability.Thetechnicalbasesforthisanalysesissummarizedbelow:(1)Existingsuppressionsystemsinareas/zonesthatareprovidedwithautomaticsuppressionsystemswillextinguishthe'ostulatedfireandfirewillnotpropagateoutsideofthearea/zone.(2)Combustibleloadingcontainedinthefireareas/zonesofconcernisunder47,000Btu/ft(3)Infireareas/zonesthatarenotprovidedwithautomaticsuppressionsystems,therequiredsafeshutdown'omponentsan'd/orcablesarebeingprotected.(4)Afirestartingin.anareacouldbeassumedtopropagate'otheadjacentareathroughverticalundamperedductpenetrations.However,safeshutdownoutsideoftheseareasstillcanbeachievedusingtheunaffectedtr'ain.oralternate'afeshutdownmethod.Inconclusion,thisanalysisverifiesthatthe.s'afeshutdownsystemrequirementsrelativetotheguidelines'ofAppendixRarebeingmetandtheexemptionfrominstallationoffiredampersintheventilationductsisjustified.Inaddition,thisexemptionrequesthasnoimpactontheexemptionrequestscontainedinSubsections7.2and7.10ofthisreport.Page7-106 TABLE7.13-1AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATESDRAWINGNUMBER1012131415ReactorCoolantDrainTankPumpPipeTunnelDrainTankandPumpSumpPumpRoomReactorCoolantFilterUnit1ValveOperatingGalleryBoricAcidEvaporatingRoomSealWaterInjectionAreaPipewayGasDecayTankRoomTunnel,Elevation601ftVolumeControlTankConcentrateHoldingTankWasteGasCompressorRoomConcentrateHoldingTankWL-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-M12-5713-412-5713-412-5713-412-5713-412-5715-1012-5715-1012-5715-1012-5715-1012-5715-1012-5715-1012-5715-1012-5717-712-5717-712-5717-712-5717-7Page1of1 TABLE7.13-2AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATESDRAWINGNUMBER1012PipeTunnelReactorCoolantDrainTankSumpPump8TankPipewaySealWaterIn)ectionFiltersReactorCoolant/SealWaterFilterMonitorTankAreaMonitorTankAreaMonitorTankAreaMonitorTankAreaVolumnControlTankAreaSealWaterHeatExchangerAreaWL-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-M12-5713-412-5713-412-5713.-412-5715-1012-5715-1012-5715-1012-5717-712-5717-712-5717-712-5717-712-5717-712-5717-7Page1of1

TABLE7.13-3AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATESDRAWINGNUMBERBehindMCCEsonElevation587WL"88,EofWL-MElevation633ftUnit2Side..WL-8.28WofWL-M12-5715-1012-5719-7Page1of1 C,y TABLE7.13-4AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATEDRAWINGNUMBERValveGalleryPipeTunnelGasDecayTankRoomBoricAcidEvaporatorValveOperatingGalleryWL-78WofWL-LWL-78WofWL-LWL-B8WL-KWL-8.58WL-K12-5715-1012-5715-1012-5715-1012-5715-10Page1of1

TABLE7.13-5AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATESDRAWINGNUMBERCVCSFacilityCVCSFacilityWL-4.4EWL-LWI.-4.48WL-L12-5715-1012-5715-10Page1of1

TABLE7.13-6AIRREGISTERLOCATIONAIRREGISTERNUMBERAREALOCATIONCOORDINATESDRAWINGNUMBERMonitorPumpsWL-88WL-L12-5715-10Page1of.1 0hP 7.14ContainmentBuildinSeismicGasEXEMPTIONREQUESTPertheprovisionsof10CFR50.48and10CFR50.12IndianaandMichiganElectricCompanyrequestsexemptionfromtherequirementsofAppendixR;i.e.,fire-ratedsealsshallbeinstalledintheseismicgappenetrationsaroundtheContainmentBuildings.AseismicgapexistsaroundtheContainmentBuildingofeachunitthatprovidesanopeningofapproximately6inchesbetweentheContainmentBuildingandthewalls,ceilingsandfloorsofthestructuresimmediatelyadjacenttocontainment.TheMarch1983submittaldidnotaddresstheseismicgapwhenfireareaboundariesweredefined.Thus,thisevaluationhasbeenperformedtoconfirm.thattheseseismicgapsinthefireboundariesdonotaffectsafeshutdowncapability.Thefireareasandzonesadjacenttotheperimeterofcontainmentthatcontainseismicgapsarethefollowing:FireAreasasPresentedbyTable7.14-1-1FireAreaDescritionElevation8101138Quadrant1CableTunnelQuadrant4CableTunnelQuadrant3MCableTunnelQuadrant3SCableTunnelQuadrant2CableTunnel596ft596ft596ft596ft612ftPage7-107 FireAreasasPresentedbyTable7.14-1-2FireAreaDescxitionElevation23<<'426'739QuadrantQuadrantQuadrantQuadrantQuadrant3NCableTunnel3MCableTunnel4CableTunnel1CableTunnel2CableTunnel596ft596ft596ft596ft612ftFireAreas/ZonesasPresentedbyTable7.14-2-1FireArea/Zone33B12i,4969'.:108DescritionNESWValveAreaQuadrant2PipingTunnelHVACVestibuleAuxiliaryBuildingHestSteamValveEnclosureElevation612't596ft633ft650ft612ftFire.Areas/ZonesasPresentedbyTable7.14-2-2FireArea/"Zone34B<<225069109DescritionNESWValveAreaQuadrant2PipingTunnelHVACVestibuleAuxiliaxyBuildingNestSteamValveEnclosureElevation612ft596'ft633ft650ft612ftTheMarch1983'ubmittal,theprimarysourceofinformationforthis.analysis,containsadditionalinformationonthefireareaandzonedescriptions.Theattachedtables(7.14-1-1,7.14-1-2,7.14-2-1,7.14-2-2)provideasummaryoftheevaluationsperformedontheareasorzonesaffectedbyseismicgaps.Page7-108 Thegeneralmethodologyusedwastoevaluatethearea/zoneofconcerninconcertwiththead'jacentareas/zonesontheleft,right,andimmediatelyabove.Thenewareadefinedbythismethod(seismicgapevaluationarea)wasanalyzedtodeterminetheimpactonsafeshutdowncomponentsandcircuits.Fourfireareas,aspreviouslydefinedintheMarch.1983submittal,containmultiplezoneswithintheareaandarepartofthisanalysis.Theseismicgapevaluationareasonlyconsidersthezoneorareaimmediatelyadjacenttothepostulatedfirearea.Thisconfigurationassumestheseismicgapwillallowcommunicat.ionbetweenadjacentareasorzones.Duetodistance,lowcombustibleloading,locationof.combustiblesand/orpresenceof:detectionandsuppressionsystemstheaffectof'thefirewillnotinvolveallareasandzonesthatcommunicatebyseismicgaps.FireZones33and33Awerenotconsidered"withintheseismicgapevaluationastheyareonlyadjacenttoeachotherandFire"Zone33B.FireZones33,33Aand33BwereevaluatedasoneareaintheMarch1983submittal.FireZone33BisconsideredinthisevaluationandincludesFireZone33Aaspartoftheseismicgapevaluationarea.Themirrorimagezones(34,34A,34B)inUnit24wereconsideredinasimilarmanner.Thecommunicationbetween>FireZones49and50isthroughFireZone52separatedbyover~150feet.FireZone51isadjacentto52.FireZones49(Unit')and50(Unit2)aretheonlyzoneswithintheareathat"containseismicgapsatthecontainmentwall.ThecommunicationPage7-109 betweenFireZones49and50withinthisareawasevaluatedintheMarch1983submittal.'ireZone52isprovidedwithautomaticsuppressionanddetectionandthusprovidesadequateassurancethateitherafireorrelatedcombustionproductswouldbecontainedwithinFireZone49(thesameconfigurationexistsforFireZone50)..Thefireareacontainingzones3,32,36,69,and48containnosafeshutdownequipmentandcouldhavebeenincludedintoalargerareabuttominimizethesizeoffireareasthesefirezonesareconsideredasonearea.Thecompliancestrat'egies(i.e.,safeshutdownmethod)for'achareaorzonearemaintainedandusedthroughouttheevaluationwhiletaking'into.accountadditionalconsiderationssuchas:(1).Distancebetweenfire.zones/areas.'.*(2).Locationofcombustibles(3)Combustibleloading(4)DetectionandsuppressionsystemsEvaluationofTables7.14-1-1and7.14-1-2FivepreviouslydefinedfireareasineachunithaveautomaticC02suppressionanddetectionsystemsinthearea.Theseareasarelistedin,Tables7.14-1-1and7.14-1-2.Thewalls,floors,andceilingsofthetenareas(includingbothunits)areconstructedtoatleastal-l/2-hourfirerating.AsealintheseismicgapsprovidesabarrierforcontainingthePage7-110 gaseoussuppressionsystem.Thesealisaffixedtoboththe.containmentwallandthefloor,ceilingorwalloftheperimeterbuildings.Thesealismadeofglassfiberreinforcedsiliconesheetingandisafireretardantmaterial.Afireoriginatingwithintheareascontainingautomaticsuppressionwouldstayconfinedtothatareaandbeextinguishedbytheautomaticsuppressionsystem.Thus,eachofthesetenareaswasevaluatedasanisolatedareabasedontheassumptionthatthefirewithintheareascontainingsuppressionsystemswouldbecontainedandextinguishedinthearea.EvaluationofTables7.14-2-1and7.14-2-2Evaluationsofareasorzonesthat,werenotequippedwithtautomaticsuppressionsystemsconsideredthesealdamagedinadjacentareas/zones(left,rightandabove),'includingthose"containingautomaticsuppression.EachnewlydefinedevaluationareawasanalyzedonasafeshutdownsystembasiswiththeresultspresentedinthesystemevaluationcolumninTables7.14-2-1and7.14-2-2.Theareasand/orzonesofconcernthatdonothaveautomaticsuppressionsystemshavelowcombustibleloadingsandwithintheimmediatevicinityoftheseismicgapsaregenerallyvoidofexposedfixedcombustibles.Thezones/areasofconcernarepresentedinTables7.14-2-1.and7.14-2-2.Excludingtheareascontainingautomatic'uppressionfromthepostulatedfirelocation,thefollowingcombinationsofareas/zonesareevaluated:Page7-111 Unit1PostulatedFireLocationsandAssociatedZones/Ar'easl.2.3.4~5.33Bwith33A,38and10812with7,ll,33Band3849with69and10869with108108with49and69Unit2PostulatedFireLocationsandAssociatedZones/Areasl.2.3.4~5.34Bwith34A,39and10922with27,23,34Band3950with69and10969with109109with50and69Tables7.14-2-1and7.14-2-2presenttheresultsofthesystemevaluationforeachpostulatedfirelocation.ConclusionforContainmentSeismicGaEvaluationThisseismicgapevaluationshowsthesafe"shutdowncapabilityfor'.C.CookNuclear.Plant'Units.1and2)hasnotbeencompromisedasaresult-',of.seismicgaps.'heanalysisperformedandtheresultspresented"inthetablesindicate,onasystembasis,thecapabilitytosafelyshutdownbothunitswhenconsideringfiredamageto,safeshutdowncomponentsandcircuitscontainedintheseismicgapevaluationareas.Themethodofanalysisisconservativewhenconsideringthefirehazardsinvolvedinthevicinityoftheseismicgaps.Thatis,itisnotanticipatedthatthe.evaluatedareaswouldbeaffectedtotheextentthatfirewouldpropagatethroughtheseismicgapsandcausedamagethroughouttheevaluationarea.Combustionproductswouldlikelyentertheadjacentareasorzones;however,damagetosafeshutdowncomponentsandcircuitswouldlikelynotoccur.Page7-112 Inanyevent,theanalysiscontainedhereinassumesthedamagetosafeshutdowncomponentsandcircuitsintheseismicgapevaluationareadidoccurandverifiesthatsafeshutdowncapabilityismaintained.Inaddition,thisexemptionrequesthasnoimpactontheexemptionrequestscontainedinSubsections7.8,7.9,or7.13ofthisreport.Page7-113 I'g*

TABLE7.14-1-1UNIT1FIREAREAS/ZONESPROTECTEDBYAUTOMATICC02SUPPRESSIONFIREAREA~COMBUSTIBLELOADINQ(BTU/FT)(FT))EQUIVALENTFIRESEVERITY(MIN)++SUPPRESSIONDETECTIONCOMMENT116,629960100(88)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILL-NOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.30,8412,05035(23.1)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEM'WILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.10104,25080090(78.3)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.26,34484030(19.7)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.3841,2882,65045(31)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWI[.LEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.ENFIREAREASASDEFINEDINSAFESHUTDOWNCAPABILITYASSESSMENTOFMARCH1983SUBMITTALiiFIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF1 0TABLE7.14-1-2UNIT2FIREAREAS/ZONESPROTECTEDBYAUTOMATICC02SUPPRESSIONFIREAREA'~COMBUSTIBLELOADING.(BTU/FT)ARE(FT))EQUIVALENTFIRESEVERITY(MIN)+~SUPPRESSIONDETECTIONCOMMENT2785s009lo056-75(63C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.2621,0862,74625(15.9)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.2478,08380070(58.7)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPL'IANCEMETHODSSTILLAPPLY.2328,71684035(21.5)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONE.ANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.3930,6222,66735(23)C02AUTOMATICIONIZATIONANDINFRAREDTYPESEXISTINGAUTOMATICC02SUPPRESSIONSYSTEMWILLEXTINGUISHANYPOSTULATEDFIREINTHEAREA/ZONEANDTHEFIREWILLNOTPROPAGATEOUTSIDEOFTHEAREA/ZONETHROUGHSEISMICGAPS.THEPREVIOUSSAFESHUTDOWNCAPABILITYCOMPLIANCEMETHODSSTILLAPPLY.CFIREAREASASDEFINEDINSAFESHUTDOWNCAPABILITYASSESSMENTOFMARCH1983SUBMITTAL44FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF1

~'JIi%

SEISMICGAPEVALUATIONAREATABLE7.14-2-1UNIT1FIREAREAS/ZONESOFCONCERNPOSTULATED,FIRELOCATION3384'DJACENTAREA/ZONEOFCONCERN33A+38108COMBUSTIBLELOADINQ(BTU/FT)2369,12941,28810,187(FT3)6003,2162,650897EQUIVALENTFIRESEVERITY(MIN)++A100.220(6.7)45(31)20(7.6)SUPPRESSIONNONEMANUALDELUGEFORCHARCOALFILTERAUTOMATICC02NONE'ETECTIONNONETHERMISTORFORCHARCOALFILTERUNITIONIZATIONANDINFRAREDTYPESNONESYSTEMEVALUATIONFIREZONES33Bo33As38'08AND49ARECOMBINED,ASONEAREAFORTHISSYSTEMEVALUATION.THESAFESHUTDOWNSYSTEMSAVAILABILITYISPRESENTEDBELOW:1.MS-INSTRUMENTATIONASSOCIATEDWITHSTEAMGENERATORS1AND4ISAVAILABLEINCONJUNCTIONWITHMANUALOPERATIONOFASSOCIATEDMRVsOUTSIDEOFTHEEVALUATIONAREA.2.AF-TWOOUTOFTHREETRAINSOFTHEAFSYSTEMSARELOCATEDOUTSIDETHEEVALUATIONAREA;THUS,STEAMGENERATORS1AND4CANBESUPPLIEDWITH-AUXILIARYFEEDWATER.3~RCSThANDTcNORMALINDICATIONSAREAFFECTED'UTALTERNATIVEINDICATIONCAPABILITYISBEINGPROVIDEDASPRESENTEDINMARCH1983SUBMITTAL.ATLEASTONETRAINOFOTHERRCSPROCESSMONITORINGSYSTEMCOMPONENTSISLOCATEDOUTSIDEOFTHEEVALUATIONAREA.4.CVCS-THESAFESHUTDOWNCOMPONENTSANDCIRCUITSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTTHECABLEASSOCIATEDWITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.5.THEFOLLOWINGSYSTEMSHAVENOCOMPONENTSORCIRCUITSINTHEEVALUATIONAREA:;oESSENTIALSERVICEWATER(ESW)oCOMPONENTCOOLINGWATER(CCW)oEMERGENCYPOWERSYSTEM(EPS)oRESIDUALHEATREMOVAL(RHR)*FIREZONES33,33AAND338ARECONTAINEDINAFIREAREAFORWHICHTHECOMBUSTIBLELOADINGIS11,530BTU/FT,AREAIS7,236FTANDEQUIVALENTFIRESEVERITYIS8.5MINUTES4%FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF4 TABLE7.14-2ontinued)SEISMICGAPEVALUATIONAREAADJACENTPOSTULATED.AREA/ZONEFIRE'FLOCATIONCONCERNCOMBUSTIBLELOADINQ(BTU/FT)(FT))EQUIVALENTFIRESEVERITY(MIN)~+SUPPRESSIONDETECTIONSYSTEMEVALUATION1233B*381,722116,62926,34423641,2887,81215(1.2)84030(19.7)60010(0.2)2,65045(31)960100(87.5)NONEAUTOMATICC02AUTOMATICC02NONEAUTOMATICC02/INONEIONIZATIONANDINFRAREDTYPESIONIZATIONANDINFRAREDTYPESNONEIONIZATIONANDINFRAREDTYPESFIREZONECOMBINEDEVALUATIOAVAILABIL1.MS2.AF3.RCS4.CVCS-5.EPS6.RHRS12,7,11,338AND38AREASONEAREAFORTHISSYSTEMN.THESAFESHUTDOWNSYSTEMSITYISPRESENTEDBELOW:ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTSANDCIRCUITSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTSANDCIRCUITSOFTHISSYSTEMASSOCIATEDWITHTHESAMEUNAFFECTEDMSTRAINARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.ThANDTcNORMALINDICATIONSAREAFFECTED,BUTALTERNATIVEINDI-CATIONCAPABILITYISBEINGPROVIDEDASPRESENTEDINMARCH1983SUBMITTAL.ATLEASTONETRAINOFOTHERSAFESHUTDOWNPROCESSMONITORINGSYSTEMCOMPONENTSARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.THESAFESHUTDOWNCOMPONENTSANDCIRCUITSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.ATLEASTONETRAINOFSAFESHUT-DOWNCOMPONENTSANDCIRCUITSOFTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.THEELSCLOCATEDINTHEAREA,WHICHCOULDBEAFFECTED,SUPPLIESPOWERTOTHEAFFECTEDTRAINOFSAFESHUTDOWNINSTRUMENTATIONDISCUSSEDABOVE.MANUALOPERATIONOFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATIONAREA,ISAVAILABLE.(THISFIREAREAISCONTINUEDONTHENEXTPAGE)@FIREZONES33,33AAND33BARECONTAINEDINAFIREAREAFORWHICHTHECOMBUSTIBLELOADINGIS11,530BTU/FTAREAIS7,236FT2ANDEQUIVALENTFIRESEVERITYIS8.5MINUTES4'i'FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE2OF4 t'Q7~n TABLE7.14-2"continued)SEISMICGAPEVALUATIONAREAPOSTULATEDFIRELOCATIONADJACENTAREA/ZONECOMBUSTIBLEOfLOADINGCONCERN(BTU/FT)(FT5)EQUIVALENTFIRESEVERITY(MIN)~'iSUPPRESSIONDETECTIONSYSTEMEVALUATION12(cont.)7.THEFOLLOWINGSAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATIONAREA:oESWoCCW496986,7252,9983,20075(65.2)17,91415(2.2)MANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITIONIZATIONANDTHERMISTORFORCHARCOALFILTERIONIZATIONAND'HERMISTORSFORHVACUNITSFIREZONES49,69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATIONREGARDINGSAFESHUTDOWN,CAPABILITYASSESSMENT.FIREZONES49AND69CONTAINNOSAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITS.THESAFESHUTDOWNCOMPONENTSANDCIRCUITSLOCATEDINTHIS;EVALUATIONAREAARETHECOMPONENTSANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOMPLIANCEMETHODISPRESENTEDIN1983SUBMITTAL.10810,18789720(7.6)NONENONE1082,99810,18717,91415(2.2)89720(7.6)MANUALDELUGEFORHVACUNITNONEIONIZATIONANDTHERMISTORSFORHVACUNITSNONEFIREZONES69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATIONREGARDINGSAFESHUTDOWNCAPABILITYASSESSMENT.FIREZONE69CONTAINSNO-SAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITS.THESAFESHUTDOWNCOMPONENTSANDCIRCUITSLOCATEDINTHISEVALUATIONAREAARETHECOMPONENTSANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOM-'LIANCEMETHODISPRESENTEDIN1983SUBMITTAL.44FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE3OF4 SMCAP1iTABLE7.14"2continued)OVALATPOSTULATEDFIRELOCATIONONAREAADJACENTAREA/ZONEOFCONCERNCOMBUSTIBLELOADIN/ARE/(BTU/FTc)(FTc)EQUIVALENTFIRESEVERITY(MIN)<<~SUPPRESSIONDETECTIONSYSTEMEVALUATION108496910,18786,7252,99889720(7.6)3,20075(65.2)17o91415(2')NONEMANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITNONEIONIZATIONANDTHERMISTOR'FORCHARCOALFILTERIONIZATION~ANDTHERMISTORSFORHVACUNITSFIREZONES49,69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATIONREGARDINGSAFESHUTDOWNCAPABILITYASSESSMENT.FIREZONES49AND69CONTAINNOSAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITS.THESAFESHUTDOWNCOMPONENTSANDCIRCUITSLOCATEDINTHISEVALUATIONAREAARETHECOMPONENTSANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOMPLIANCEMETHODISPRESENTEDIN1983SUBMITTAL.4%FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE4OF4 I,sospl4 TABLE7.14-2-2UNIT2FIREAREAS/ZONESOFCONCERNSEISMICGAPEVALUATIONAREAPOSTULATEDFIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLELOADINQARE/(BTU/FT)(FT)EQUIVALENTFIRE'EVERITY(MIN)+.SUPPRESSIONDETECTIONSYSTEMEVALUATION348~34A05,7354,20460015(4.3)3,21615(3.1)NONEMANUALDELUGEFORCHARCOALFILTERIN34ANONETHERMISTORFORCHARCOALFILTERUNITIN34AFIREZONES348,34A,39,109AND50ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.THESAFESHUTDOWNSYSTEMSAVAILABILITYISPRESENTEDBELOW:1.MS-INSTRUMENTATIONASSOCIATEDWITHSTEAMGENERATORS1AND4ISAVAILABLEINCONJUNCTIONWITHMANUALOPERATIONOFASSOCIATEDMRVs.3910930,62215,8722,66735(23)89725(11.8)AUTOMATICC02NONEIONIZATIONANDINFRAREDTYPESNONE2.AF3.RCS4.CVCS-5.EPSMANUALOPERATIONOFAFFECTEDFM0212AND242INCONJUNCTIONWITHREMOTEOPERATIONOFOTHERREQUIREDSAFESHUTDOWNCOMPONENTSOFTHISSYSTEMOUTSIDEOFTHEEVALUATIONAREAWILLUTILIZEAFSYSTEMTOSUPPLYAUXILIARYFEEDWATERTOSTEAMGENERATORS1AND4.ThANDTcNORMALINDICATIONSAREAFFECTED,BUTALTERNATIVEINDI-CATIONCAPABILITYISBEINGPROVIDEDASPRESENTEDINMARCH1983SUBMITTAL.ATLEASTONETRAINOFOTHERRCSSAFESHUTDOWNPROCESSMONITORINGSYSTEMCOMPONENTSISt.OCATEDOUTSIDEOFTHEEVALUATIONAREA.THESAFESHUTDOWNCOMPONENTSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTTHECABLEASSOCIATEDWITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.SAFESHUTDOWNCOMPONENTSANDCIRCUITSOFONETRAINOFEPS,WHICHINCLUDESDGAB,ARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.(THISFIREAREAISCONTINUEDONTHENEXTPAGE)+FIREZONES34,34AAND348ARECONTAINEDINAFIREAREAFORWHICHTHECOMBUSTIBLELOADINGIS5,909BTU/FT,AREAIS4,856FTANDEQUIVALENTFIRESEVERITYIS4.3MINUTES04FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE1OF5 li'l"F TABLE7.14-2-continued)SEISMICGAPEVALUATIONAREAPOSTULATEDFIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLELOADINQ(BTU/FTc)ARE(FT5)EQUIVALENTFIRESEVERITY(MIN)++SUPPRESSIONDETECTIONSYSTEMEVALUATION348(cont;)6.CCW7.RHR8.ESW-CIRCUITSANDCOMPONENTSASSOCIATEDWITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.MANUALOPERATIONOFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.MANUALOPERATION.OFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATIONAREA,ISAVAILABLE.NOTAFFECTED.EVALUATIONAREADOESNOTCONTAINCOMPONENTSORCIRCUITSASSOCIATEDWITHTHISSYSTEMREQUIREDFORSAFESHUTDOWN.22272339"1,02285,00928,7165,73530,6228,46010(0.6)lo05675(63.9)84035(21.5)60015(4.3)2,66735(23)NONEAUTOMATICC02AUTOMATICC02NONEAUTOMATICC02NONEIONIZATIONANDINFRAREDTYPES'ONIZATIONANDINFRAREDTYPESNONEIONIZATIONANDINFRAREDTYPES1.MS2~AF3.RCSINSTRUMENTATIONASSOCIATEDWITHSTEAMGENERATORS1AND4ISAVAILABLEINCONJUNCTIONWITHMANUALOPERATIONOFASSOCIATEDMRVsOUTSIDEOFTHEEVALUATIONAREA.MANUALOPERATIONOFAFFECTEDFM0212AND242ANDFRV247INCONJUNCTIONWITHREMOTEOPERATIONOFOTHERCOMPONENTSOFTHISSYSTEMREQUIREDFORSAFESHUTDOWNOUTSIDEOFTHEEVALUATIONAREAWILLUTILIZEAFSYSTEMTOSUPPLYAUXILIARYFEEDWATERTOSTEAMGENERATORS1AND4.ThANDTcNORMALINDICATIONSAREAFFECTED,BUTALTERNATIVEIND1CA-TIONCAPABILITYISBEINGPROVIDEDASPRESENTEDINMARCH1983SUBMITTAL.ASLEASTONETRAINOFOTHERRCSSAFESHUTDOWNPROCESSMONITORINGSYSTEMCOMPONENTSISLOCATEDOUTSIDEOFTHEEVALUATIONAREA.FIREZONES22,27,23,348AND39ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.THESAFESHUTDOWNSYSTEMSAVAILABILITYISPRESENTEDBELOW:(THISFIREAREAISCONTINUEDONTHENEXTPAGE)4FIREZONES34,34AAND348ARECONTAINEDINAFIREAREAFORWHICHTHECOMBUSTIBLELOADINGISANDEQUIVALENTFIRESEVERITYIS4.3MINUTES44'FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE2OF55,909BTU/FT,AREAIS4,856FT I'i+Pt TABLE7.14-2-continued)SEISMICGAP'VALUATIONAREAPOSTULATEDFIRELOCATION22(cont.)ADJACENTZONEOFCONCERNCOMBUSTIBLELOADINGARE/(BTU/FT4)(FT)EQUIVALENTFIRESEVERITY(MIN)++SUPPRESSIONDETECTION4.CVCS-5.EPS6.CCW7.RHR8.ESWSYSTEMEVALUATIONTHESAFESHUTDOWNCOMPONENTSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTCABLEASSOCIATEDWITHQRV-251,WHICHFAILSAT50GPMMINIMUMFLOWPOSITION.SAFESHUTDOWNCOMPONENTSANDCIRCUITSOFONETRAINOFEPS,WHICHINCLUDESDGAB,ARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.CIRCUITSANDCOMPONENTSASSOCIATEDWITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.MANUALOPERATIONOFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.MANUALOPERATIONOFTHEAFFECTEDVALVES'HICHHAVECABLESINTHEEVALUATIONAREA;ISAVAILABLE.NOTAFFECTED.EVALUATIONAREADOESNOTCONTAINCOMPONENTSORCIRCUITSASSOCIATEDWITHTHISSYSTEMREQUIREDFORSAFESHUTDOWN.506910944,3092,99815,8723,20017.91489745(33.2)MANUALDELUGEFORCHARCOALFILTER15(2.2)MANUALDELUGEFORHVACUNIT25(11.8)NONEIONIZATIONANDTHERMISTORFORCHARCOALFILTERIONIZATIONAND-THERMISTORSFORHVACUNITSNONE1.MS2.AFINSTRUMENTATIONASSOCIATEDWITHSTEAMGENERATORS1AND4ISAVAILABLEINCONJUNCTIONWITHMANUALOPERATIONOFASSOCIATEDMRVsOUTSIDEOFTHEEVALUATIONAREA.ONETRAINOFTHISSYSTEMINCLUDINGPUMPPP-3W(ANDASSOCIATEDCABLES)ANDFM0212AND242ANDASSOCIATEDCABLESARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.FIREZONES50o69AND109ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.THESAFESHUTDOWNSYSTEMSAVAILABILITYISPRESENTEDBELOW:(THISFIREAREAISCONTINUEDONTHENEXTPAGE)4%FIRESEVERITYVALUESAREASSUMEDANDACTUAL)PAGE3OF5 JpI,IJg4Ip4tl TABLE7.14-2-continued)SKMIGAPEVALUATIONAREAPOSTULATEDFIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLELOADINQARE/(BTU/FT)(FT4)EQUIVALENTFIRESEVERITY(MIN)+~.SUPPRESSIONDETECTIONSYSTEMEVALUATION50(cont.)3.CVCS-COMPONENTSANDCIRCUITSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTONEOFTHECHARGINGPUMPSSUCTIONVALVECABLE(REDUNDANTVALVEISAVAILABLE).4.CCW-CIRCUITSANDCOMPONENTSASSOCIATEDWITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.MANUALOPERATIONOFTHEAFFECTEDVALVESREQUIREDI'ORCOLDSHUTDOWNISAVAILABLE.5.RHR=MANUALOPERATIONOFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATIONAREA,ISAVAILABLE.6.THEFOLLOWINGSAFESHUTDOWNSYSTEMSCOMPONENTSANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATIONAREA:*o.RCSoEPSoESW691092,99815,87217i91489715(2.2)MANUALDELUGEFORHVACUNIT25(11.8)NONEIONIZATIONANDTHERMISTORSFORHVACUNITSNONEFIREZONES69AND108ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATIONREGARDINGSAFESHUTDOWNCAPABILITYASSESSMENT.FIREZONE69CONTAINSNOSAFESHUTDOWNSYSTEMS,COMPONENTSANDCIRCUITS.THESAFESHUTDOWNCOMPONENTSANDCIRCUITSLOCATEDINTHISEVALUATIONAREAARETHECOMPONENTSANDCIRCUITSLOCATEDINFIREZONE108FORWHICHCOM-PLIANCEMETHOD,ISPRESENTEDIN1983SUBMITTAL.*~FIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE4OF5 lhj'1 TABLE7.14-2-.continued)SEISMICGAPEVALUATIONAREAPOSTULATEDFIRELOCATIONADJACENTZONEOFCONCERNCOMBUSTIBLELOADINQ(BTU/FT)(FT3)EQUIVALENTFIRESEVERITY(MIN)++SUPPRESSIONDETECTIONSYSTEMEVALUATION109506915,87244,3092,99889725(11.8)3,20045(33.2)17~91415(2.2)NONEMANUALDELUGEFORCHARCOALFILTERMANUALDELUGEFORHVACUNITNONEIONIZATIONANDTHERMISTORFORCHARCOALFILTERIONIZATIONANDTHERMISTORSFORHVACUNITSFIREZONES50,69AND109ARECOMBINEDASONEAREAFORTHISSYSTEMEVALUATION.THESAFESHUTDOWNSYSTEMSAVAILABILITYISPRESENTEDBELOW:1.MS-INSTRUMENTATIONASSOCIATEDWITHSTEAMGENERATORS1AND4ISAVAILABLEINCONJUNCTION'WITHMANUALOPERATIONOFASSOCIATEDMRVsOUTSIDEOFTHEEVALUATIONAREA.2.AF-ONETRAINOFTHISSYSTEMINCLUDINGPUMPPP-3W(ANDASSOCIATEDCABLES)ANDFM0212AND242ANDASSOCIATEDCABLESARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.3.CVCS-COMPONENTSANDCIRCUITSASSOCIATEDWITHTHISSYSTEMARELOCATEDOUTSIDEOFTHEEVALUATIONAREA,EXCEPTONEOFTHECHARGINGPUMPSSUCTIONVALVECABLE(REDUNDANTVALVEISAVAILABLE).4.CCW-CIRCUITSANDCOMPONENTSASSOCIATEDWITHTHISSYSTEMREQUIREDFORHOTSHUTDOWNARELOCATEDOUTSIDEOFTHEEVALUATIONAREA.MANUALOPERATIONOFTHEAFFECTEDVALVESREQUIREDFORCOLDSHUTDOWNISAVAILABLE.5.RHR-MANUALOPERATIONOFTHEAFFECTEDVALVES,WHICHHAVECABLESINTHEEVALUATIONAREA,ISAVAILABLE.6.THEFOLLOWINGSAFESHUTDOWNSYSTEMSCOMPONENTSANDCIRCUITSARELOCATEDOUTSIDEOFTHEEVALUATIONAREA:oRCSoEPSoESW~ENFIRESEVERITYVALUESAREASSUMEDAND(ACTUAL)PAGE5OF5 iver UNTII84T2FZIAfZIFZ18SEENOTEIITYPJFZ188CURBINGPYPJ24ZIFNOTE:PlaMOVASLEWALLS81PI84PROOMS.P21881~ON411180HPEOESTALS.Q3~NdeNSAREeavAPFROxa4ATeNSQ4STAFIWAYUPTOFZNO.8NOTTOSCALEIMO.310IMO-32FZIC)11'QFMSWgIgIfZIOgIIIV+SCREENMESHGATES(TYPJ2P358FZIGPP.35WIZ'~FZIH18lMO.310c042IOGHIMO-320POWER/23'058/'/800311I18$003&2SCREENMESHGATEFIGURE7.2RHR/CTSPUMPAREAAUXILIARYBUILDINGFIREZONE1,1A-HELEV.573' M~kkEWXLISK+%%%%%%%%&%%E%40~eao~~

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~'P~~T~~L00~il~5S.bESSENTIALSERVICEWATERPUMPSUCTIONPARTPLANSGREENHOUSEEL.673LEGENDQDRYCHEMICALFIREEXTINGUISHER+CC2FIREEXTINGUISHERFIGURE7.73MANUALFIREFIGHTINGEQUIPMENTLOCATEDINZONE296 Ir MRV243MPP241MPP242MPP-210MRV.2'13MPP.211MPP212EPT243EP'T2'1333A137'PT.223NOTE1EXMENSCNSAREONLYAPPROXAlATIONS2EPT'ARETICELECTROPNEUMATCTRANSMITTERSFORMRV213.223.233,243EPT223EPT233338110EPT233FIGURE7.8EASTMAINSTEAMENCLOSUREMAINSTEAMPIPINGANDWESTNESWPIPINGAREAUNIT1FIREZONES33,33A,34B,ELEV.6".2' MPP210MRV213MPP211MPP212MPP.24OMRV243MPP.241MPP.242MRV243MRV213MPP210MPP212MPP240MPP241MPP242EPT.243EPT21334A34BEPT.233EPT223NOTE.PiEXMENSIHSAREONLYAPPROXIAATIONSEPT'4AREtHEELECTROPNEUMAT1CTRAkShetTERSFORMRV213.223.2ll.243FIGURE7.9EASTMAINSTEAMENCLOSUREIVIAINSTEAMPIPINGANDWESTNESWPIPINGAREAUNIT2FIREZONES3434A34BELEV.6't2' rfEI~/

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l~IU'IUU'U TOPOFDUCT618'-932x5824x443HOURFIRERATEDBARRIERW/SI'HERMOLAGPREFABRICATED330PANST4B6.5(TYP.)FLEVEL609'W'ECTIONB-BDUCTPRELIM)NARY3HOURFIRERATEDARRIEWl'TSI'HERMOLAGPREFAB330PANELSCObFIN.ELEV.609'W'ECTIONA-AC9YCL-LSPAREPUMPS15'W'~SEEDETAILFIGURE7.10.9+lE+2WPUMPS~HVACDUCTABOVEIDWG12-5717I55a3241WPUl.tPIPARTIALFLOORPLANAUXILIARYBUILDING-ELV.809'-0Sb@35AIRSHAPEUPTOF252CLKNOTE:DIMENSIONSAREAPPROXIMATENOTTOSCALEFIGURE7.10.7FIREBARRIERBETWEENCOMPONENTCOOLINGWATERPUMPS

Iv4"ft"J~b*VF'SS~C PRELIMINARYD.G.GOOKPLANT-PUMPSFIREBARRIERDETAlLTROWELGRADE"TSI"330APPLIEDTOST4B6.5FOR3HR.FIRERATING3HOVRFIRERATED1/2""TSITHERMOLAG"330PREFABRICATEDPANELSWITH'I/O"EXPANDEDMETALBETWEENPANELSSEISMICSuppORTFIGURE7.10.9FIREBARRIERBETWEENCOMPONENTCOOLINGWATERPUMPS HOTE61TUR8SUPCA8fIICCA83OSCILLOGRAPH4SfISMCM(IM1ORINSTRUMEHTCA86AUXRllAYCAR'AR816AUXRELAYCAR.AR81'OCOISTFICA8CRCO8LIGHTINGCASINET9RMSCTPANEL10TRAXI8REACTORPROTECTCA8.1ISAFfTXJAROSAClUAIIOHCA8S.11REACIORPROTECl.COMPU'lER1IPUTCARS16'ROTIMATHCONIROLROOMIO1112SROHTOfPAWL4IO.?c;PANELPODUNFT2;~;6SClHATCH'TOQTII~CABlfYAULT~/IC)),8'+)'cryv>PROPOSEPFXIE)AINKII4';"93'IIOURRATEOROLLUPDOORTOURT1CONTROLROOM26HUTE1OWENSIONSAREEÃRYAIT&OXIMATIONSFIGURE7.11CONTROLROOMUNIT1ZONE3ELEV.633' 1t~~r 3-IIOURRATEOROLL-UPOOOR1011>cCcc~:..c8T'gHATCIITOCABLEVAULT.-E-.YFRaITPANEL:-..I..;.,......lO'..:;.'.'ANEL.FORLSRT1'UNII1MAWCONIHOlROOM36PROPOSEOFIREBARRIERNOTESIOCTXSTRCASCACO3LIGIITWGCAR3fcOVfIWOR4AMHINAMYLIFILHCUSICIf4OSCXIOGHAM5HlACfORVl'SSIILLVLLCARNEf6AUXHllAYCASAH82'.AUXRELAYCASAR818LIGIITWGCAB9REAC1OHPHOTECTCOMPUTERCONTROLWPUTCARSIOSATEGUAHDSACTUATIONCARS11.TRAN8REACtORPROTEC'fCARSTOLXRT1CONTROLROOM35'OTEQIEXMENSIOKSAREOtRYAPPIOXPAATIONSFIGURE7.12CONTROLROOIVIUNIT2ZONE54ELEV.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'

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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~~~OROROROROROROROROROROROROORORORORORORORORORO~RR~~~ROROROR28~3f~22(~lLcwEeGoATYOLUHE609 4~lPY~,4'+orJgI'It0 8.PROPOSEDMODIFICATIONSIntroductionThesafeshutdownsystemreviewfortheD.C.CookNuclearPlantindicatedthatmostfireareaswereincompliancewithAppendixR.Themajorityoftheareasnotincompliancewillbeprovidedwithalternateshutdowncapability,whichisdiscussedindetailinSection5.Acomprehensivefirehazardsanalysiswasperformedontheremainingfireareas.ThemajorityoftheseareaswillbebroughtintoSectionIII.Gcomplianceviafireprotectionmodifications.RefertoTablel-lforthespecificIII.Gcompliancemeasuresachieved.Thebalanceofllfireareas,orzones,requireexemptionrequestsorengineeringevaluationsandwillbemodifiedtothegreatest.extentpracticabletoensureatleastonetrainof.safeshutdowncircuitsandcomponentsremainsfreeoffiredamage.Thespecific'exemptionrequestsarediscussedinSection7.Sincethe1983submittal,AppendixRlong-termconformanceworkhascontinuedatD.C.Cook.Asaresult,severalI'ngineeringevaluationshavebeenperformedthathaveaddedseveralfireprotectionmodificationsandalleviatedtheneedforseveralfireprotectionmodificationspreviouslyidentifiedinthe1983AppendixRsubmittal.Theengineeringevaluationsperformedsince1983arecontainedinSection9.Page8-1 ThissectionidentifiestheproposedfireprotectionmodificationsnecessarytobringfireareasintocompliancewithSectionIII.GortosatisfytheassumptionsmadeinSection7foreachexemptionfromtheprovisionsofSectionIII.GrequestedortosupporttheengineeringevaluationsmadeinSection9.Inadditionto'thefireprotectionmodificationsproposedinthissection,certainmechanicalandelectricalsystemmodificationswillbeperformedtomeettherequirementsofSection=III.G.3.Thesemechanicalandelectricalsystemmodifications,whichwereproposedanddiscussed'nSection.5;whenimplemented,will.providethealternativeshutdownc'apabilityproposedfor,D.C..Cook.';Thesealternativeshutdownmodifications'are.'repeatedinthis.sectionby-'ystemclassification(e.g.,ESW,'CVCS,'CW,etc.).Duringthecourseo'fthe-electricalsystem.coordinationstudy,variouselectricalc'ircuitprotectivedeviceprotectioncurvesweremodifiedtooptimizeelectricalcoordination.Recalibrat::ionoftheinstalleddevicestothesenewcurveswillalsobeimplementedasaplantmodification.Thetotalscopeofthesesystemandfireprotectionmodifications,asproposed,willbringD.C.Cooktoauniformlevelofprotectioninallfireareassuchthatfurthermodificationswouldnotsubstantiallyenhanceoverallfireprotection.Anumberofmodifications,asoriginallyproposed,Page8-2 OwerecontingentuponeithertheNRCacceptanceofthealternativeshutdowncapabilityorthegrantingoftheexemptionsdiscussedinSection7,whichhavebothbeenreceived.FireProtectionModificationsThemodificationsdiscussedinthissectionarethosespecificallyinvolvingfireprotectionfeaturesandarecategorizedasfollows:(l)ConduitandCableTrayProtection(2)SuppressionandDetection(3)Boundary.ModificationThemajorityofthemodificationsproposedwillupgradetheratingsoffireareaboundaries.to.provide.afire.resistanceinexcessoftheexpectedcombustible,.loadingon,either.sideoftheboundary.Conduitandcable.tray.protection,.whenrequired,villprovideafirerating.,equivalenttoonehour.andprotectatleasioneredundanttrainofsystemsinthezoneorarea.Insomecases,additionalconduitsandcabletraysmaybeprotectedeventhoughnotrequiredforseparationofredundanttrainsofsystems.Thismayoccurwhere,duetothephysicalproximityofconduitsandcabletraysnotrequiringprotection,adequateprotectioncannotbeachievedwithoutprotectingtheadjacentconduitsandcabletrays.Firestopshavebeenprovidedincertaincabletraysinordertoremoveinterveningcombustiblesasanissueinvariousplantlocations.UnitlfirestoppingwasPage8-3 performedunderRFC-01-2681whileUnit2firestoppingwasperformedunderRFC-02-2696.Thesuppressionanddetectionmodificationswillcomplywithapplicablefireprotectioncodesandstandardsforinstallationandcoverage.Themodificationsmade-will,providesuppressionanddetectioninallareascontainingredundantsafe-shutdownequipmentwherealternateshutdownisnotpracticaloranexemptionisrequested.Theboundarymodificationsaregenerallymadetoupgradefireareaboundariestoaratingcommensuratewiththecombustiblefireloadingofthefirearea,ortoprovideprotectionbetween-tworedundantdivisions.:ThemodificationsproposedwillbringtheD.C.CookPlanttoauniformlevelofprotectionforallareassuchthatfurthermodificationswould.,not.enhancefire.protection:safety.Themodifications;proposed,,'redescribed'n-thesubsequentparagraphs.8.1FireArea1(FireZones1,lAthrouh.1H,136,137,138A,138Band138CRHRandCTSPumArea8.1.1ConduitandCableTraProtectionThepowercableinconduits8003R-1and8003R-2forthewestRHRpumps(1PP-35Wand2PP-35W)Units1and2,respectively,willbeprovidedwithfireprotectionbarriersequivalenttoone-hourrating.Table8-1providesalistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents.TheconduitsarelocatedintheextremePage8-4 northwestandsouthwestcornersofthefireareaenteringfromconduitembeddedinconcrete.'heconduitsarebeingprotectedinordertosupportanexemptionfromthecriteriaofAppendix-R;SectionIII.G.2(c).SectionIII.G.2(c)requiresthatatleastonetrainofredundantsafe.shutdownequipmentorcableslocatedinthesamefireareabeprovidedwithonehourprotection.-Inaddition,detectionandsuppressionarerequiredforthearea-;TheexemptioninSection7.2ofthisreportisrequestedfromthesuppressioncriteriaofAppendixR,SectionIII.G.2(c).8.1.2SuressionandDetectionTheeightpumpcubicleswillbeprovidedwithautomaticfiredetectionwithremotealarmingcapabilityinthe.ControlRooms";Thismodification:isrequiredtosupporttheexemption.requesti.'nSection7.2ofthisreport.withrespect-todetectioncriteriaofIAppendixR,SectionIII.G.2(c).'rovidingdetectioncapabilityinthepumpcubiclesresults'n'etectioninnormallyaccessible--locations,ofthe,.fi.re,.area.8.1.3BoundarModifications/EvaluationsThesealsandpenetrationsinthewallsseparatingtheeastRHR.pumpsfromthewestRHRpumpsofbothunitswillbeupgradedtoathree-hourfirerating.ThismodificationisrequiredtoseparateredundantsafeshutdowncomponentsthatarelocatedinthesamefireareaperthecriteriaofAppendixR,III.G.2(c).Inaddition,itisrequiredtosupporttheexemptionrequestinSection7.2ofthisreport.Page8-5 Ceilingpenetrationswillbeupgradedtoprovideatleastaone-hourfireratingtoseparatethisfireareafromtheoneaboveonthe587ftelevationoftheAuxiliaryBuilding.TheAuxiliaryBuildingHVACductexemptionpresentedinSection7.13providesjustifications.fortheundamperedductspenetratingt'hroughthe'ceilingofFireZone1.Theventilationduct'nteringthecommonairshaft(FireZones12or22)fromtheeastandwestRHRpumpsofbothunitswi'llbeprovidedwiththree-hour-rateddamperstoseparatethetwotrainsofeachunit'sRHRpumpsperthecriteriaofAppendixR,Section,III.G.2(c)and:alsotosupporttheexemptionrequestinSection"7.2ofthis.report.Theengineeringevaluations1presentedinSection9.4justifytheundamperedHVACopenings'tothesesame,airshafts'romthecontainmentspraypump.,'cubicles.Theengineering'evaluation-'resentedinSection9.33justifies~stheundamperedshaftopeningconnecting=FireZone138BwithFireZone6A.Thestairwayopeningbetweenthepumpcubicleswillbeprovidedwithautomaticsuppressionfromthemodificationsproposed'inFireZone5toseparatethisfireareafromtheoneaboveonthe587'televationoftheAuxiliaryBuilding(seeSection8.2).AnengineeringevaluationhasbeenperformedjustifyingtheundamperedventilationductsbetweenFireZones1Aand1BtoFireZone12andbetweenFireZoneslEandlFtoFireZone22.(SeeSection9.4.)Page8-6 AnengineeringevaluationhasbeenperformedjustifyingtheunsealedopeningsinleakagedetectionpipechasesthatconnecttheRHRandcontainmentspraypumpcubiclesonthe573ftelevation(FireZoneslAthroughlH)withtheirheatexchangercubiclesonthe609ftelevation(FireZones44Athrough44H)..Openingforleakdetectionpurposesareprovidedwithinthechargingpumpcubiclesonthe587ftelevation(FireZone62A.,62B,62C,63A,63Band63C).(SeeSections9.31and9.32.)8.2FireZone5EastEndoftheAuxiliarBuildinBetweentheUnit1andUnit2CharinPumCubicles~la,58.2.1ConduitandCableTraProtectionThecabletrays(lAZ-C50,lAZ-C46AND1AZ-P8)andconduit8026R-1fortheredtrainofUnit1CVCSwillbeprovidedwithfireprotectionbarriersequivalenttoaone-hourrating.Theconduitsforemergencydiesel,generators(Unit1DGAB)8506R-1and(Unit2DGCD)8155G-2andtheassociatedpullboxeswillbeprovidedwithfireprotectionbarriersequivalenttoaone-hourrating.Table8-1providesalistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseraceways,andtheirassociatedcomponents.TheconduitsarebeingprotectedinordertobringFireZone5intocompliancewiththecriteriaofAppendixR,SectionIII.G.2(c).SectionIII.G.2(c)requiresthatatleastonetrainofredundantsafeshutdownequipmentorcableslocatedinthesamefireareabeprovidedwithonehourprotection.Inaddition,detectionandsuppressionarerequiredforthefirearea.Page8-7 8.2.2SuressionandDetectionTheexistingautomaticdrypilotreactionsprinklersystem,wi.llbeextendedtoprovideprotectionaroundtheperimeterofthestairwayopeningsthat'eadto:FireZone1belowandFireZone44Nabovetoensuretheintegrityoftheboundaryseparatingthetwofireareas.8r.2.3BoundarModifications/EvaluationsTheaccesscontrolgatesandtheventilationopeningstothechargingpumpcubicleswillbemodifiedasdescribedinSection8..24.3inordertoensuretheintegrityoftheboundaries.betweenseparatefireareas.ThepenetrationstoFireZones44N,62A,62B,'62Cand63A,.63B,,63C.willbeprovidedwithsealsequivalenttotheratingoftheconcrete.slab/wallinordertoensuretheintegrityof,the.boundariesbetweenseparatefireareas.Theengineering"eval'uationspresentedinSections9.6and9..28providejustificationforcombiningFireZones6Aand61withFireZones5,6N,6M,,64A64B,65Aand,;,65B.TheengineeringevaluationspresentedinSections9.34and9.37providejustificationforundamperedventilationductsandminorunsealedpenetrationsbetweenFireZone5andFireZones36and32,respectively.Page8-8 8.3FireZones6A,6N,6M,6S,61,64A,64B,65Aand65BAuxxlxarBuxldinElevations587ftand601ft8.3.1ConduitandCableTraProtectionThefollowingracewayswillbeprovidedwithfireprotectionbarriersequivalenttoaone-hourfirerating:8505R-1anditsassociatedpullboxforUnit1DGAB;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-2anditsassociatedpullboxfortheUnit2DGCD;cabletrayslA-P20,1A-C55,lAZ-P9,lAZ-P8,lAZ-C54,lAZ-C56and1AZ-C50fortheredtraino'Unit1CVCS.'able8-1providesa-listbyfirezoneofth'wrappedraceways,thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents'.Theconduitsarebeingprotectedt'oensurecompliancewiththecriteriaofAppendixR,SectionIII.G.2(c),whichrequiresthat"atleastonetrainofredundants'afe'shutdownequipmentorcableslocatedinthesamefireareabeprovidedwithonehourprotection.Inaddition,detectionandsuppressionarerequiredforthefirearea.Theopencabletraystraversingthezonefromthenorthsidetothesouthsidewillbeappropriatelyfire-stoppedtopreventfirepropagationfromonesectionofthefirezonetotheother.'hismodificationisrequiredtoensurecompliancewiththecriteriaofAppendixR,Page8-9 SectionIII.G.2(b),whichrequiresa-minimumof20ftofhorizontalseparationwithoutinterveningcombustiblesbetweenredundantsafeshutdownequipmentorcableslocatedinthesamefirearea.Inaddition,detectionandsuppressionarerequiredforthefirearea.8;.3.2'uressionandDetectionTheexistingautomaticdrypilot,preactionsprinklersystemwillbeextendedtoprovideprotectionaroundtheperimeterofthestairwayopeningsthatleadtoFireZones44Nand44SaboveandfromFireZone'1"below'n'rdertoensure"the-integrity-of.-boundariesbetweenseparatefireareas.8..3.3~BoundarModifications/EvaluationsThepenetrations'.inthe,ceilingof.'ireZones6N,6Mand6StotheelevationaboveFireZones44N-and44Swill,be'providedwithsealsequivalent"to"theratingoftheconcreteslabinordertoensuretheintegrity'ofboundariesbetweenseparatefireareas.TheAuxiliaryBuildingHVACductexemptionpresentedinSection7.13providesjustificationsthattheundamperedductspenetratingthroughthefloorandceilingofthesefirezonesdonotimpact'afeshutdowncapability.TheengineeringevaluationpresentedinSection9.4providesjustificationforundamperedventilationductsfromFireZones64Aand64BtoFireArea12,alongwithundamperedventilationductsfromFireZones65Aand65BtoFireArea22.Page8-10 TheengineeringevaluationspresentedinSection9.6and9.28providejustificationforcombiningFireZones6Aand61withFireZones5,6A,6N,6M,69,64A,64B,65Aand65B.TheengineeringevaluationspresentedinSections9.6and9.33providejustificationfornotsealingtheunsealedopeningsandpenetrationsintheboundariesofFireZone6Atoadjacentfirezones.However,unsealedpenetrationstotheUnit1andUnit2chargingpumpcubicles(FireZones62A,62B,62C,63A,63B,and63C)wererequiredtobesealedinordertoensuretheintegrityofboundar,iesbetweenseparatefireareas.8.4FireArea12Unit1Quadrant2PiinTunnel8..8'8Noneproposed8.4.2~SuressionandDetectionNoneproposed8.4.3BoundarModifications/EvaluationsAnengineeringevaluationhasbeenperformed(seeSection9.4)requiringthree-hourfire-rateddamperstobeinstalledintheHVACpenetrationstotheUnit1chargingpumpcubicles(FiredZones62A,62Band62C).Inaddition,theunsealed'penetrationstoFireZones62A,62B,62C(seeSection9.4)and33Bwillbesealedwitharatingatleastequivalenttotheboundaryrating.Bothsetsofmodificationsarerequiredinordertoensuretheintegrityofboundariesbetweenseparatefireareas.SeeSeismicGapExemptionRequestSection7.14forjustifyingtheunsealedPage.8-11 seismicgaptoFireZone33B.SeeSection9.23forjustificationofthemanwayopeningfromthetrenchinFireArea12toFireArea116.Engineeringevaluationshavealsobeenperformed(seeSection9.4)justifyingtheexistingundamperedventilationopeningsintoadjacentfirezones(1A,1B,64A,64B,44A,44B,"44C,44D,49and69).'or-additionalboundarymodificationsto'FireZones1Cand1D,seeSection8.1.3.8.5FireArea14Unit1TransformerRoom8.5.1ConduitandCableTraProtectionNoneproposed8.5.2SuressionandDetectionAnautomaticfiredetectionsystemwillbeinstalledinthezoneprovidingremotealarmstotheControlRoom.ThismodificationisrequiredtosupporttheexemptionrequestinSection7.3ofthisreport,fromthefixedsuppressioncriteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasprovidedwithalternateshutdowncapabilityalsobeprotectedbyadetectionandfixedsuppressionsystem.8.5.3BoundarEvaluationsAnengineeringevaluationhasbeenperformed-justifyingtheunrated,field-fabricatedHVACdampertoFireZone13(seeSection9.7).ContinuedonPage8-12APage8-12 8.5AFireArea15Unit1DieselGeneratorRoom8.SA.lConduitandCableTraProtectionThefollowingconduitsoftheredtrainwillbeprovidedwithafireprotectionbarrierequivalenttoathree-hourrating:8003R-1,8004R-l,8048R-l,.8503R-l,and8504R-1.Table8-1providesalistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseraceways,andtheirassociatedcomponents.Theconduitsarebeingprotectedinorder'toensurecompliancewithAppendixR,SectionIII.G.2(a).8.5A.2SuressionandDetectionNoneproposed8.5A.3BoundarModifications/EvaluationsNoneproposedContinuedonPage8-13Page8-12A e

8.6FireArea17CAuxiliarFeedwaterPumCorridor8.6.1ConduitandCableTraProtectionThefollowingconduitsoftheredtrainUnit1AFWpump(1PP-3W)willbeprovidedwithafireprotectionbarrierequivalenttoaone-hourrating:9875R-1,9874R-1,9747R-1and9748R-1.ThefollowingconduitsfortheredtrainUnit2AFWpump(2PP-3W)willbeprovidedwithsimilarprotection:8788R-2,8789R-2,9747R-2,and9748R-2.Table8-1providesalistbyfire.zoneofthewrappedraceways,thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents.TheconduitsarebeingprotectedinordertoensurecompliancewithAppendixR,SectionIII.G.2(c).Inaddition,detectionandsuppressionarerequiredforthefirearea.8.6.2SuressionandDetectionTheexistingautomaticwetpipesprinklersystemintheUnit2Turbine-DrivenFeedPumpRoomwillbeextendedtoprovideareacoveragetoFireArea.17CsoastoensurecompliancewithAppendixR,SectionIII.G.2(c).Thefir'eareawillbeequippedwithanautomaticdetectionIsystemthatprovidesalarmsintheControlRoomsoastoensurecompliancewithAppendixR,SectionIII.G.2(c).8.6AFireArea19Unit2DieselGeneratorRoom8.6A.lConduitandCableTraProtectionThefollowinggreentrainconduitswillbeprovidedwithafireprotectionbarrierequivalenttoathree-hourrating:Page8-13 8001G-2,8003G-2,8004G-2,8007G-2,8048G-2,8544G-2,and8545G-2.Table8-1providesalistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseraceways,andtheirassociatedcomponents.TheconduitsarebeingprotectedinordertoensurecompliancewithAppendixR,SectionIII.G.2(a).>8;6A.2SuressionandDetection.Noneproposed.8.6A.3BoundarModifications/EvaluationsNoneproposed8.7FireArea20Unit2TransformerRoom,8.7.1ConduitandCableTraProtectionNoneproposedi8.7.2SuressionandDetectionTheareawillbeequipped.withanautomaticfiredetection,systemthatprovides,alarmsintheControlRoom.Thismodificationisrequired.tosupporttheexemptionrequestinSection7.4ofthisreportfromthefixedsuppressioncriteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternateshutdowncapabilityalsobeprotectedbyadetectionandfixedsuppressionsystem.8.7.3BoundarEvaluationsAnengineeringevaluationhasbeenperformedjustifyingtheunrated,fieldfabricatedHVACdampertoFireZone21'(seeSection9.8).Page8-14 8.8FireArea22Unit2Quadrant2PiinTunnel~~8,.8.1ConduitandCableTraProtectionNoneproposed8.8.2SuressionandDetectionNoneproposed8.8.3BoundarModifications/EvaluationsAnengineeringevaluationhasbeenperformed(seeSection9.4)requiringthree-hourfire-rateddamperstobeinstalledintheHVACpenetrationstoFireZones63A,63Band63C.Inaddition,theunsealedpenetrationstoFireZones63A,63B,63C(seeSection9.4)and34Bwillbesealedwitharatingatleastequivalenttotheboundary.Bothsetsofmodificationsarerequiredinordertoensure,the.integrityofboundariesbetweenseparatefireareas.SeeSeismicGapExemptionRequestSectio'n7.14forjustifyingthe'nsealed'eismicgapto'FireZone34B-.SeeSection9.24forjustificationofthemanwayopeningfromthetrenchinFireArea22toFireArea117.Engineeringevaluationshavealsobeenperformed(seeSection9.4)justifying'heexistingunsealedHVACpenetrationtoFireZoneslE,1F,65A,65B,44E,44F,44G,44H,50and69.ForadditionalboundarymodificationstoFireZones1Gand1H,seeSection8.1.3.8.9FireZone29(A,B,E)Unit1ESWPumAreaIncludintheMCCs8.9.1ConduitandCableTraProtectionNoneproposedPage8-15 8.9.2SuressionandDetectionThefirezonewillbeequippedwithanautomaticdetectionsystemprovidingalarmsin,theControlRoom.ThismodificationisrequiredtosupporttheexemptionrequestinSection7.5oft'hisreportfromthefixedsuppressioncriteriaofAppendixR,SectionIII.G.3..'..Section.III..G.3requires'that.areasorzonesp'rovidedwithalternateshutdowncapabilityalsobeprotectedbya.detectionandfixedsuppressionsystem.8.9.3BoundarModifications/EvaluationsThepenetrations'inthewallseparatingFir'e'Zones.-29A=and29BfromFireZones29Cand,'9Dwillbeupgradedtoathree-hourfire,rating.~Thismodificationisrequired'o'separateredundantsafeshutdowncomponents.thatarelocatedin.thesame.f.irearea.per-'thecriteriaofAppendixR,.SectionIII.G.2(a).'-Inaddition,'it'srequired'-to'supportthefixedsuppressione'xemptionrequestin'Section7.5ofthis-report.Anengineeringevaluationhasbeenperformed(see-Section9..25)justifyingtheundamperedHVACpenetrationslocatedintheceilingofFireZones29Aand29B,thescreenmeshsecurityaccessgatesprovidingaccesstothezonesfromFireZone142,andtheopenstairwayfromFireZone29BtoFireZone29G.8.10FireZone29(C,D,F)Unit2ESWPumAreaIncludintheMCCRoom8.10.1ConduitandCableTraProtectionNoneproposedPage8-16.

8.10.2SuressionandDetectionThefirezonewillbeequippedwithanautomaticdetectionsystemthatprovidesalarmsintheControlRoom..modificationisrequiredtosupporttheexemptionrequestinSection7.6ofthisreportfromthefixedsuppressioncriteriaofAppendixR,Section'III.G.3.SectionIII.G.3requires,thatareasorzones'rovidedwithalternate'shutdowncapabilityalsobeprotectedbyadetectionandfixedsuppressionsystem.8.10.3BoundarModifications/EvaluationsEngineeringevaluations"havebeen,performed(seeSection9.25).justifyingtheunratedhatchlocatedbetweentheflooroXFireZone29Candthe,ceilingofFire.Zone29G;andthescreenmesh'.securityaccessgates.providingaccesstothezonesfromFireZone-.142.In,addition,Section9.25provides'justificationforrequiringthree-hour-ratedfire.damperstobeinstalledintheHVACpenetrationslocated,.inthe-ceilingofFireZones29Cand29D,'.alongwiththesealingofopenpenetrationsinthebarrier.ThismodificationisrequiredtoseparateredundantsafeshutdowncomponentsthatarelocatedinthesamefireareaperthecriteriaofAppendix-R,SectionIII.G.2(a).Inaddition:,itisrequiredtosupportthefixedsuppressionexemptionrequestinSection7.6ofthisreport.ForadditionalboundarymodificationstoFireZones29Aand29B,refertoSection8.9.3.Page8-17 8.11FireZone29GUnit1andUnit2ScreenhouseAuxiliarMCCRoom8.11.1ConduitandCableTraProtectionThefollowingconduitsandassociatedpullboxeswillbeprovidedwithfireprotectionbarriersequivalenttoaone-hourrating:JaPullBox¹1and8626G-l,8627G-l,8628G-1,8629G-1PullBox¹2and8624R-l,8624R-2,8618R-l,8619R-1,8620R-lPullBox¹3and8618R-2,8619R-2,8620R-2,8996R-2,8996R-1PullBox¹4and8977G-2,9987G-2,8629G-2,8628G-2,8627G-2ThefollowingconduitsforthepowersuppliestothefourESWpumps,willbe-'rovidedwithfireprotectionbarriersIequivalentto*aone-hour'ating:&004R-l,'004G-1,8004G-2,8004R-2and9232G-1forvalveWMO-701.Table8-1providesalistlbyfire,zone.ofthe'rappedraceways,thecablesofconcern'Iwithinthoseracewaysand'heir'ssociatedcomponents.TheconduitsarebeingprotectedinordertosupporttheexemptioninSection7.7ofthisreportfromtheautomaticsuppressioncriteriaofAppendixR,SectionIII.G.2(c).SectionIII.G.2(c)requiresatleastonetrainofredundantsafeshutdownequipmentorcableslocatedinthesamefireareabeprovidedwithonehourprotection.Inaddition,suppressionanddetectionarerequiredforthezone.Page8-18 8.11.2SuressionandDetection~~~~~ThefirezonewillbeequippedwithanautomaticdetectionsystemprovidingalarmsintheControlRoomtosupporttheautomaticsuppressionexemptionrequestinSection7.7ofthisreport.8.11.3BoundarModifications/EvaluationsAnengineeringevaluationhasbeen,performedjustifyingtheunratedhatchlocatedintheceilingofFireZone29GtoFireZone29Candtheopenstairwayto29B.(SeeSection9.25.)8.12FireArea33,33A,33Band105Unit1EastMainSteamValveEnclosure,MannSteamPxznArea,WestNESWValveArea,andContractorAccessControlBuxldin8.12.1ConduitandCableTraProtectionNoneproposed8.12.2.SuressionandDetectionFireZones33,33Aand33BwillbeprovidedwithanautomaticdetectionsystemthatprovidesalarmsintheControlRoom.ThismodificationisrequiredtosupporttheexemptionrequestinSection7.8ofthisreportfromthefixedsuppressioncriteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternateshutdowncapabilityalsobeprotectedbyadetectionandfixedsuppressionsystem.8.12.3BoundarModifications/EvaluationsAthree-hourfire-rateddamperwasprovidedforthegrateinthefloortoFireArea8belowpriortoMarch1983inordertoPage8-19 ensuretheintegrityofboundariesbetweenseparatefireareas.RefertoSection8.4.3foradditionalboundarymodificationtoFireArea12.SeeSeismicGapExemptionRequestSection7.14forjustifyingtheunsealedseismicgaptoFireArea12.SeeSection9;23forjustificationoftheunprotectedopeningtoFireArea1'16.Refer"toSection9.29forboundaryeva'luation'andconsolidationofFireZone'05intothefireareacontainingFireZones33,33Aand33B.SeeSection9.35forjustificationoftheundamperedandunsealedpipepenetrationsfromFireZone33AtoFireZone108.8.13FireArea34,34A34BUnit2EastMainSteamValveEnclosure,MainSteamPiinArea,andWestNESWValveArea8.13.1'onduitandCableTraProtectionNoneproposed.8".13.2;Suressionand'Detection'hefireareawillbeprovidedwithanautomaticdetectionsystemthatprovidesalarmsintheControlRoom.ThismodificationisrequiredtosupporttheexemptionrequestinSection7.9ofthisreportfromthefixedsuppressioncriteriaofAppendixR,SectionIII.G.3.SectionIII.G.3requiresthatareasorzonesprovidedwithalternateshutdowncapabilityalsobeprotectedbyadetectionandfixedsuppressionsystem.8.13.3BoundarModifications/EvaluationsA-'three-hourfire-rateddamperwasprovidedforthegrateinthefloortoFireArea26belowpriortoMarch1983inordertoPage8-20 ensuretheintegrityofboundariesbetweenseparatefireareas.RefertoSection8.8.3for,additionalboundarymodificationtoFireArea22.SeeSeismicGapExemptionRequestSection7.14forjustifyingtheunsealedseismicgaptoFireArea22.SeeSection9.24forjustificationoftheunprotectedopeningofFireArea117.SeeSection9.36forjustificationoftheundamperedandunsealedpipepenetrationsfrom'FireZones34AtoFireZone109,,:8.14FireArea40(AandB)Unit14kVSwitchearRoomsandFireArea41Unit1ESSandMCCRooms8.14.1ConduitandCableTraProtectionNoneproposed8.14.2SuressionandDetectionNoneproposed8.14.3'oundarEvaluationsEngineeringevaluationshavebeenperformedjustifyingtheexistenceofunratedhatchesfromFireZone40BandFireArea41up.toFireArea55.SeeSections9.15and.9.16.8..15FireZone43AccessControlArea8.,15.1ConduitandCableTraProtectionNoneproposed8.15.2SuressionandDetectionNoneroosed8.15.3BoundarEvaluations\EngineeringevaluationshavebeenperformedtojustifytheexistenceoftheunratedhatchtoFireArea56(seeSection9.14),unrateddoorstoFireZone110(seeSection9.21),andPage8-21 unprotectedopeningtoFireZone91(seeSection9.1).RefertoSection9.10forboundaryevaluationandconsolidationofFireZone43intothefireareacontainingFireZones37,44N,44S,44Athrough44H.8.16FireZones44Nand44SAuxiliarBuildinComonentCoolinWaterSstemAreaElevation609ft8.16.1ConduitandCableTraProtectionFireprotectionbarriershavinganequivalentofone-hourfireratingwillbeprovidedforthefollowing:2AZ-C58and9152R-2forUnit2ESW(WMO-738);8344G-2and8333G-2forUnit2EPS(DGCD);2A-C3,2A-C6and2AI-C24forUnit2AFW(2PP-3E);lAZ-C20forUnit1AFW(1PP-3-E);2AZ-C58(previouslynoted)forUnit2CVCS(PP-50W[LO]).Table8-1provides.alistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents.TheconduitsarebeingAprotectedtoensurecompliancewiththecriteriaofAppendixR,'SectionIII.G.2(c),whichrequiresthatatleastonetrainofredundant'safeshutdownequipmentorcables=locatedinthesamefireareabeprovidedwithonehourprotection.Inaddition,detectionandsuppressionarerequiredforthefirearea.Theopencabletraystraversingthezonefromthenorthsidetothesouthsidewill.beappropriatelyfire-stoppedtopreventfirepropagationfromonesectionofthefirezonetotheother.ThismodificationisrequiredtoensurecompliancewiththecriteriaofAppendixR,SectionIII.G.2(b),whichrequiresaPage8-22

~~minimumof20ftofhorizontalseparationwithoutintervening'combustiblesbetweenredundantsafeshutdownequipmentorcableslocatedinthesamefirearea.Inaddition,detectionandsuppressionarerequiredforthefirearea.8.16.2SuressionandDetectionTheexistingautomatic'rypilotsprinklersystemwillbeextendedintothefarnorthsectionofFireZone44Natelevation620ft6in.,bytheentrancestoFireZone43,inthevicinityoftheCCWpumps,andbythemonitortankstoprovidetotalareacoverageinthenormallyaccessibleareas.ThismodificationisrequiredtoensurecompliancewiththecriteriaofAppendixR,SectionsIII.G.2(b)andIII.G.2(c).Intheimmediatevicinityofthecomponentcoolingwaterpumps,theextendedsuppressionsystemwillprovideenhancedcoverageforprotectionoftheCCWpumpsbypayingparticularattentionto'pacingandsprinklerheadlocation.Thedesignofthesystem'willprovideaddedassurancethatthesuppressionsystemwillpreventanydamagetoCCWpumpsastheresultofafire.Inaddition,twoionizationsmokedetectorswillbelocatedatceilinglevelinthevicinityoftheCCWpumps.TheextendedsuppressionsystemwillalsoprovidecoveragearoundtheperimeterofthethreestairwayopeningsleadinguptoadjacentFireZones51and52inordertoensuretheintegrityofboundariesbetweenseparatefireareas.Thedetectionandsuppressionsystemmodificationsarerequiredtosupportthe"exemptioninSection7.10ofthisreportwithPage8-23 respecttoseparationofredundantCCWpumpslocatedinthesamefirearea.8.16.3BoundarModifications/EvaluationsThepenetrations,fromFireZones44Nand44StoFireZone52willbesealedtothe-equivalentratingoftheconcreteslabinordertoensuretheintegrityofboundaries'etweenseparatefireareas.TheAuxiliary.BuildingHVACductexemptionpresentedinSection7.13providesjustificationfortheundamperedductspenetratingthroughthefloorandceilingofFireZones44Nand44S.'U~~TheareaoftheCCWpumpswillbeprovidedwithasteelskJ'onstruction,firebarrierthatiscoated.with'sublimingmaterial..tobelocatedbetweentheUnit.1and2pumps.The'irebarrierwillalsobeextendedbetweentheexistingsparepumpandtheUnit1,east'.pump',',thusprovidingaphysicalseparationofCCWpumpstoensuretheavailabilityofatleasttwoofthefouroperationalpumpsperthecriteriaof,Appendix,R,SectionIII.G.2(a).Anengineeringevaluationhasbeenperformed(seeSection9.3)justifyingtheconfigurationofthebarrierseparatingtheit'nit1and2CCWpumpsandtheundamperedcommonventilationductsoverthepumps.Section9.3alsorequiresthatafire-rateddamperbeaddedtotheHVACshaftwhereitpenetratesintoFireZone52aboveinordertoensuretheintegrityofboundariesbetweenseparatefireareas.ForadditionalboundaryPage8-24 modificationstoFireZones5,6N,and6S,seeSections8.2.3and~~8.3.3.ForboundaryevaluationbetweenFireZones43and44N,seeSection9.10.Section9.6presentsthe601-ftpipetunnelevaluation.'hisevaluationjustifiestheunratedboundarybarriersbetweenFireZone6AandFireZones44Nand44S.Anengineeringevaluationhasbeenperformed(seeSection9.22)justifyingtheunrateddoorsbetweenFireZones44Sand111.8.17FireArea47(A..andB)Unit24kVSwitchearRoomsandFireArea45Unit2ESSandMCCRooms8.17.1ConduitandCableTraProtectionNoneproposed8.17.2SuressionandDetection"Noneproposed8.17.3BoundarModifications/EvaluationsEngineeringevaluationshavebeenperformedtojustifythe'existence"o'f"'unrat'edhatchesfromFireArea-45andFireArea47BtoFireArea60.SeeSections9.19and9.20.8.18FireZones49and50Unit1andUnit2HVACVestibule8.18.1ConduitandCableTraProtectionNoneproposed8.18.2SuressionandDetectionNoneproposedPage8-25 8.18.3BoundarModifications/EvaluationsEngineeringevaluationshavebeenperformedcombiningthefireareacontainingFireZones49and50withthefireareathatcontainedFireZones.3,32,36,48and69(seeSection9.9)alongwithFireAreas31,35,106,107and146(seeSection9.30).'TheseismicgapexemptionpresentedinSection7.14providesjustificationfortheunsealedseismicgapcommunicatingwithFireZones33B,69and108forUnit1,andFireZones34B,69and109forUnit2.8.19FireZones51and52EastandWestEndofAuxiliarBuildinElevation633ft8.19.1ConduitandCableTraProtectionNoneproposed8.19.2SuressionandDetectionThefirezoneswillbeprovidedwithanautomaticdrypilotreactionsprinklersystemthatwillincludeprotectionaroundthettperimeterofthestairwellopeningsleadinguptoadjacentFireZone69andthenormallyaccessibleareaswithinFireZones51and52.ThesemodificationsarerequiredtoensurecompliancewithAppendixR,SectionsIII.G.2(b)andIII.G.2(c),andalsotoensuretheintegrityofboundariesbetweenseparatefireareas.8.19.3BoundarModifications/EvaluationsAnengineeringevaluationhasbeenperformedjustifyingtheexistenceoftheunratedhatchleadingtoFireArea59(seeSection9.18).Page8-26 RefertoSection9.9fortheevaluationof.combiningthefireareacontainingFireZones51and52withthefireareathatcontainedFireZones3,32,36,48and69.Inaddition,Section9.30presentstheevaluationcombining,theabove-mentioned,fireareawithFireAreas31,35,106,107and146.Foradditionalboundarymodificationsto'enetrationseals)andfiredamperstoFireZones44Nand44S,refertoSection8.16.3.8.20FireArea53Unit1ControlRoom8.20.1,ConduitandtCableTraProtectionNonepropos'ed/8.20.2SuressionandDetection4Noneproposed8.20.3BoundarModifications/EvaluationsTheUnit2hotshutdownpanel(FireZone145)willbeprovidedwithafireprotectionbarrierhavingarating,equivalenttothreehours.Thebarrierwillbedesignedtoprovideaccesstothepanelforitsintendedusewhilestillservingasathree-hourfireprotectionbarrier.Thismodificationisrequiredtoseparateredundant/alternatesafeshutdowncomponentsoriginallylocatedinthesamefirearea.Asaresultofthismodification,FireZone145willbelocatedinafireareaseparatefromFireArea53.ThedoorconnectingtoFireArea54willbeupgradedtoathree-hourrating.ThismodificationisrequiredtoensurethePage8-27 integrityofboundariesbetweenseparatefireareas.EngineeringevaluationshavebeenperformedjustifyingtheunratedhatchtoFireZone57(seeSection9.13)andtheunratedhatchtoFireZone70(seeSection9.5).8.21FireArea54Unit2ControlRoom8.21.1'onduitandCableTraProtectionNoneproposed.8.21.2SuressionandDetectionNoneproposed8;..21.3BoundarModifications/EvaluationsTheUnit1hotshutdownpanel(FireZone144)willbeprovided.withafireprotection.barrierhavingaratingequivalenttothreehours.The,barrier.will'edesignedtoprovide,.accesstothe,panelforitsintendeduse.whilestills'erving;as.athree-hourfireprotection'arrier.Thismodificationisrequiredtoseparateredundant/alternatesafeshutdowncomponentsoriginallylocatedinthee;samefirearea.Asaresultofthismodification,FireZone144willbelocatedinafireareaseparatefromFireArea54.ThedoorconnectingtoFireArea53willbeupgradedtoathree-hourrating.Thismodificationisrequiredinordertoensuretheintegrityofboundariesbetweenseparatefireareas.EngineeringevaluationshavebeenperformedjustifyingtheunratedhatchtoFireZone58(seeSection9.17),theunratedhatchtoFireZone73(seeSection9.5),andtheundamperedHVACventilationducttoFireZone73(seeSection9.2).Page8-28 8.22FireZone57Unit1ControlRoomCableVault8.22.1ConduitandCableTraProtectionNoneproposed8.22.2SuressionandDetection,Noneproposed8.22.3BoundarModifications/EvaluationsAnengineeringevaluationhasbeenperformedtojustifytheexistenceoftheunratedhatchfromFireArea53toFireZone57.(SeeSection9.13.)8.23FireZone58Unit2ControlRoomCableVault8.23.1ConduitandCableTraProtectionNoneproposed8.23.2SuressionandDetectionNoneproposed8.23.3,,BoundarModifications/EvaluationsAnengineeringevaluationhasbeenperformedtojustifythe,existenceoftheunratedhatchfromFireArea54toFireZone58(seeSection9.17).8.24FireArea62(A,B,C)Unit1CharinPumAreaandFireArea63A,B,CUnit2CharinPumArea8.24.1ConduitandCableTraProtectionNoneproposed8.24.2SuressionandDetectionNoneproposedPage8-29 8.24.3BoundarModificationsltTheopening(2ftx4ft)inthewalltoFireZone5willbeprovidedwithadamperhavinganequivalentfireratingofthreehours.ThepenetrationstoFireZones5,6A,12and22willbesealedtoanequivalentratingoftheconcretewall.Thesemodif*icationsarerequiredin-ordertoensuretheintegrityofboundaries,betweenseparatefireareas.BothaccesscontrolgatesfromFireZone5willbereplacedwiththree-hour-ratedfiredoorsthatwillbenormallyheldopenbyfusiblelinksforventilationpurposes.Thismodificatio'nisrequiredinorderto"ensuretheintegrityofboundariesbetweenseparatefireareas.SeeSections8.4.3(Unit')and8.8.3(Unit2)foradditionalboundary',modificationstoFireAreas12and22.8,.25FireZone"79Unit1TurbineRoomBetweentheUnit1EmerencDiesels8.25.1ConduitandCableTraProtectionThecabletray1AZ-C34containingUnit1greendivisionsafeshutdownsystemscableswillbeprovidedwithafireprotectionbarrierhavingaratingequivalenttoonehour.Table8-1providesalistbyfirezoneofthewrappedraceways,thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents.ThismodificationisrequiredinordertoensurecompliancewithAppendixR,SectionIII.G.2(c),whichrequiresatleastonetrainofredundantsafeshutdownequipmentorcableslocatedinthePage8-30 samefireareatobeprovidedwithonehourprotection.Inaddition,detectionandsuppressionarerequiredforthefirearea.8.25.2SuressionandDetectionTheexistingwetpipesprinklersuppressionsysteminFireZone79wi'llbeextendedtoinclude.theramp/corridorareabetweentheUnit1EDGs.A,detectionsystem,willbeaddedthatprovidesalarmsintheControlRoom.ThesemodificationsarerequiredtoensurecompliancewiththecriteriaofAppendixR,SectionIII.G.2(c).>~8.25.3BoundarModificationsNoneproposed8.26FireZone.85Unit2TurbineRoomBetweentheUnit2EmerencDxesels8.26.1Co'nduitandCableTra'ProtectionThecabletrays.2AZ-C55,2E-C9,2E-C10and2AZ-C99'ontaininggreendivisionsafeshutdownsystemcableswillbeprovided>>'ithafireprotectionbarrierhavingaratingequivalenttoonehour.Table8-1providesalistbyfirezoneofthewrappedraceways,'thecablesofconcernwithinthoseracewaysandtheirassociatedcomponents.ThismodificationisrequiredtoensurecompliancewiththecriteriaofAppendixR,SectionIII.G.2(c).SectionIII.G.2(c)requiresthatatleastonetrainofredundantsafeshutdownequipmentorcableslocatedinthesamefireareabeprovidedwithonehourprotection.InPage8-31 addition,detectionandsuppression'arerequiredinthisfirearea.8.26.2SuressionandDetectionTheexistingwetpipesprinklersysteminFireZone85willbeextendedtoincludetheramp/corridorareabetweentheUnit2EDGs.'detectionsystemwillbeaddedthatprovidesalarmsintheControlRoom.ThesemodificationsarerequiredtoensurecompliancewiththecriteriaofAppendixR,SectionIII.G.2(c).8.26.3BoundarModificationsNoneproposed8.27FireZone122Unit1ContainmentInstrumentRoomevelindicationAlso,thetraysstopped.ThesemodificationsarerequiredinordertoensurecompliancewithAppendixR,SectionIII.G.Q(f)andIII.G.2(d)respectively.8.27.2SuressionandDetection8,.27.1ConduitandCableTraProtection'Atleastone'channelofpressurizer-liquid1lwillbeprotectedwitharadiantenergyshield.thatareintervening'combustibles,betweenchannelswillbe.fire-ProposedmodificationwithdrawnbysupplementtothisreportdatedAugust1983.8.27.3BoundarModificationsNoneproposed8.28FireZone123Unit2ContainmentInstrumentRoomFireZone123willbeprovidedwiththesamemodificationsasFireZone122inUnit1.Page8-32 8.29FireZones66,74Units1and2ContainmentPiinAnnulus,.FireZones67,75Units1and2.LowerVolumeFireZones120,121Units1and2ContainmentAccumulatorEnclosure8.29.1ConduitandCableTraProtectionNoneproposed8.29.2SuressionandDetectionProposedmodificationwithdrawnbysupplementtothisreport,datedAugust1983.8.29.3BoundarModificationsNoneproposedAlternativeShutdownModificationsThemodificationsdiscussedinthis,sectionarethosespecificallyassociatedwiththealternateshutdowncapabilityo'theplant.ThesemodificationsarerequiredtoachieveoperabilityoftheAlternateShutdown;Sy'temincompliancewit%10CFR50AppendixRSectionIII.G.3.8.30ChemicalandVolumeControlSstem(CVCS)Installation'ofapermanent4-in.cross-tiebetweentheCVCSsystemsofUnits1and2.Thismodificationisrequiredtoprovidechargingcapabilityforthosealternateshutdownfireareaswheretheunitspecificchargingpumpshavebeendisabled;RefertoSection5.5.1,PAIDFigure5.5andproposedphysicalarrangementinFigure5.11.Page8-33 8."31ProcessMonitorinSstem8'.31.1ReowerinofExistinLSIPanelsProvidealternative120Vacpowerfromtheunaffectedunit'semergencypowersources.Thismodificationisrequiredtoprovideacpowerfor,processmonitoringinstrumentationindependentofthosefire',areaswhereoneunit'sacpowerislost.RefertoSection5.5.2,theone-linediagramsinFigures5.12.1and5.12.2andtheelectricalschematicshowninFigure5.13.8.31.2SteamGeneratorPr'essureforLSIPanelsInstallationoflocalpressureindicationforsteamgenerators1and4at,panel-LSI-5andsteamgenerators'2and3atpanelLSI-6.,ThesignalswillalsobetransmittedtoanewlocalshutdownpanelLSI-4.This.modificationisrequiredtoprovidesteamgeneratorpressureindicationforthosefireareaswhereControlRoomindicationhasbeenlost.8.31.3SourceRaneMoni:torinatLSIPanelsAnewsourcerangemonitoringchannelwillbeinstalledwithlocalindicationatanewlocalshutdownpanelLSI-4.Thismodificationisrequiredto,providesourcerangeindicationforthosefireareas;whereControlRoomindicationhasbeenlost.RefertoSection5.5.8andFigure5.20fortheproposeddesign.8.31.4CentralizedControlPanelLSI-4ProvidelocalindicationforRCStemperaturehotandcoldlegs,steamgeneratorpressure,steamgeneratorlevelandsourcePage8-34 rangemonitoringonnewlocalshutdownpanelLSI-4.Inaddition,panelsLSI-3andLSI-4willbeprovidedwiththecapabilityofbeingpoweredfromtheunaffectedunit'sEPS.ThismodificationisrequiredtoprovideprocessmonitoringindicationforthosefireareaswhereControlRoomindication.hasbeenlost.RefertoSection5.5.9.8.31.5ThandTcforLSIPanelsHotleg(Th)andcoldleg(Tc)temperatureinformationwillbeprovidedatpanels.LSI-5,LSI-6andLSI-4.ThandTcforRCSloops1and-4-will<beavailable,atLSI-5andLSI-4.ThandTcforRCSloops2and3'willbeavailableatLSI-6andLSI-4.ThismodificationisrequiredtoprovideTh.and,TcindicationforthosefireareaswhexeControl.Roomindicationhas.been,lost.RefertoSection5.5.6.8.32ESWSstem8.32.1ESWPumCircuitModificationsAddisolationrelaystothecircuitsthatstarttheESWpumpsfromthedischargeheaderpressureswitchesaswellasfromtheoppositeunit'sSafetyInjection(SI)signal.Also,,rel'ocate'heredundantESWpumpbreakercontrolsandtheirassociatedcables,whichpresentlyexistforthesepumpsinthealternateunit'sControlRoom,totheirownunit'shotshutdownpanel.Inaddition,thesecondESWpump'sbreaker'ontrolcircuitryandassociatedcablesinthealternateunit'shotshutdownpanelwillberemoved.ThesemodificationsarePage8-35 requiredtoensurethattheunaffectedunitsESWpumpswillbeavailable.RefertoSection5.5.3.8.32.2ESWStrainerandValveCircuitModificationsModifications,similartothosedescribedfortheESWpumpin8.32'.labove,willbeprovidedfortheESWpumpdischargev'alves,strainersandheadercross-tie'alves.RefertoSection5.5.4.8.32.3CCWPumCircuitModificationsProvideisolationofCCWpumppressureswitchandassociatedcablingwithisolationrelaysidenticalto"themethodproposedfortheESWpumppressureswitches.Thismodificationisrequiredtoensurethattheunaffected.unit'sCCWpumpswillbeavailable.RefertoSection5.5.5.8.32.4EmerencPowerSstem(EPS)Installa480VMCC'ineachunitthatwillbepoweredbytheEPSsystemoftheoppositeunit.TheseMCCswillbeusedtoprovidealternateshutdowncapabilityfor-.therepoweringofthebackuppressurizerheaters(anythreebanksofheaters)fromtheoppositeunit.ThisemergencypowersystemwillbeinstalledusingaD.C.Cookplantrepairprocedure.Thismodificationisnotrequiredtocomplywithl0CFR50AppendixR.Thismodificationprovidesaddedoperatorflexibilityforcontrollingcooldownanddepressurization.Page8-36 TABLE8-1WRAPPEDRACEWAYS/CABLESBYFIREZONEFIREZONEUNITRACEWAYSYSTEMCABLEICOMPONENT6N6M.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-18155G-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-242FRV-247FRV-.2472PP-3WFMO-212FMO-242FRV-247FMO-212FMO-242.T/AEP/8-1,P188PAGE1 IVtip\4[I-t5 TABLE8-1WRAPPEDRACEWAYS/CABLESBYFIREZONEFIREZONEUNIT6S,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-1IICOMPONENTIIIII2PP-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/CABLESBYFIRE'ZONEFIREZONEUNITRACEWAYSYSTEM.CABLECOMPONENT17C17C1919191919191929G29G29G29G29G29G29G29G29G29G.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/CABLESBYFIRE"ZONEFIREZONEUNITRACEWAYSYSTEMCABLECOMPONENT'9G29G29G29G29G29G29G29G29G29G29G44N44S,N44S44N44N44N44N44N'22"8996R-18977G-29987G-28629G-28628G-28627G-2I:8004R-18004G-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/CABLESBYFIRE'ZONEFIREZONEUNITRACEWAYSYSTEMCABLECOMPONENT7985851AZ-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/CABLESBYFIRE'ZONEFIREZONEUNIT0RACEWAYSYSTEMCABLECOMPONENT85852-2E-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/CABLESBYFIREZONEFIREZONEUNITRACEWAYSYSTEMICABLECOMPONENT158003R-18004R-18048R-18503R-18504R-1RHRESWEPSEPSEPS8003R-18004R-18048R-18503R-18504R-1PP-35WPP-7WAB-AABD-AABD-BT/AEP/81gP188PAGE7 9.BOUNDARYEVALUATIONSThissectionprovidesacompilationoffireareaboundaryevaluationswhichhavebeenperformedsincetheissuanceoftheMarch1983report.TheseevaluationsweredevelopedasaresultofvariousareasofconcernidentifiedbyIndianaandMichiganElectricCompanywithrespecttoAppendixRconformance,.Insomecases,plantlocationsthatwerenotidentifiedintheMarch1983AppendixRsubmittalhavebeencombinedwithadjacentfireareas.WiththeexceptionoftheUnit1andUnit2hotshutdownpanels(FireZones144and145),theselocations,donotcontainsafeshutdownequipmentorcables.Inothercases,evaluationswereperformedtojustifyunratedcomponentsoffireareaboundaries.TheevaluationscontainedinthissectionhavebeenpreparedinaccordancewithappropriateNRCguidelines.EachevaluationisstructuredsimilartotheexemptionrequestscontainedinSect-ion7ofthisreport.Therearesixmajorsubheadingsforleachevaluation.Theyareidentifiedasfollows:(1)Purpose,whichidentifieswhytheevaluationisbeingperformed;(2)Description,whichidentifiesthezone(s)ofconcernanddescribestheunratedportionofthefireareaboundaries;I(3)SafeShutdownEquipment',whichidentifiessafeshutdowncapabilitiesinthezone(s)ofconcern;(4)FireProtection'Equipment,whichidentifiestheautomaticandmanual-detectionandsuppressioncapabilitiesinthezone(s)of,concern;Page9-1 (5)FireHazardsAnalysis,whichidentifiesandevaluatestheimpactofthe-unratedportionofthefireareaboundaryonsafeshutdowncapabiliti'esinthezone(s)ofconcern;and(6)Conclusions,whichsummarizestheproposedmodifications,ifany,andthereasonswhytheunratedportionofthefireareaboundariesdoesnotimpactonredundantsafeshutdowncapabilities.Theresultisa.technicalevaluationthataddressestheimpactofunratedcomponentsoffireareaboundariesonredundantsafeshutdowncapabilitieslocatedoneithersideofthefireareaboundaries.Theboundaryevaluationsinthissectioncanbedividedintothefollowingmajorcategories:(1)Boundaryevaluationsaddressingfieldconstructedfire.dampersorundamperedventilationductworkinfireareaboundaries(see-Sections9.1through9.4,9.7,9.8,9.25,9.34,9.35,9.36,9.37,9.38,9.40and9.41);(2)Boundaryevaluationsaddressingunratedhatchesordoorsinfireareaboundaries(seeSections9.5,9.13through9.22,9.25,9.37and9.39);(3)Boundaryevaluationsaddressingunprotectedopeningsinfireareaboundaries(seeSections9.6,9.23,9.24,9.25,9.31,9.32,9.33,9.35,9.36and9.37);and(4)Boundaryevaluationswhichjustifycombiningadjacentfireareasintolargerfireareas(seeSections9.9through9.12,and9.26through9.30).Whiletheevaluationsineachcategoryareallstructuredthesame(i.e.,similartotheexemptionrequests),thetechnicalissueswhichareaddresseddiffer.Therefore,informationthatisimportanttoincludeinoneevaluationmaynotbeincludedinPage9-2 anevaluationin'differentcategory.Forexample,combustibleloadingsandmethodsofsafeshutdownmustbeconsideredforthefirstthreecategoriesofevaluationsidentifiedabove.Inanumberoftheseevaluations,theactualcombustibleloadinginthefirezoneorfireareasislessthanthe,combustibleloadinguponwhichtheevaluationisbased.Theactualcombustibleloadingisidentifiedinparentheses.Thisisdonesuchthatinstallingadditionalcableorcombustiblematerials(inminorquantities)willnotvoidthebasesandconclusionsoftheevaluations.However,combustibleloadingisnotofrealconcerninevaluationsaddressingcombiningfireareasintolargerfireareas.Whatisofmostconcernarethemethodsofsafeshutdown.Thefollowingboundaryevaluationsarecontainedinthissection:SectionNo.DescritionPacae9.19.2FireZone43andFireZone91DuctEvaluationFireArea54andFireZone73DuctEvaluation9-69-109.3CCWPumpAirSupplyDuctEvaluation(FireZone44S)9-1594AuxiliaryBuildingVerticalAirShaftsEvaluation(FireAreas12and22)9-219.59.6FireZone70andFireZone73HatchEvaluation601ftPipeTunnelEvaluation(FireZone6A)9-459-489.79.8FireArea13andFireArea14BoundaryEvaluation9-62FireArea21andFireArea20BoundaryEvaluation9-67Page9-3 9.9FireAreaContainingFireZones3,32,36,48and69andFireAreaContainingFireZones49,50,51and52BoundaryEvaluation9-72.9.10FireArea43andFireZone44NBoundaryEvaluation9-769.119.129.139.149.15Units1and2TurbineBuilding,MainSteamPipeTunnelsandService/OfficeBuildingEvaluationTurbineBuildingandScreenHouseBoundaryEvaluationFireArea53andFireArea57HatchEvaluationFireZone43andFireArea56HatchEvaluationFireZone40BandFireArea55HatchEvaluation9-809-859-889-939-989.16FireArea'41andFireArea55HatchEvaluation.,*9-1039.179.189.199.209.219.229.239.249.259.26FireArea54andFireArea58HatchEvaluationFireZone52andFireArea59HatchEvaluationFireArea45andFireArea60HatchEvaluationFireZone47BandFireArea60HatchEvaluationFireZone110andFireZone43DoorEvaluationFireZone111andFireZone44SDoorEvaluationFireArea116BoundaryEvaluationFireArea11'7BoundaryEvaluationEssentialServiceWaterPumpHouseHatchandFireDamperEvaluationFireArea9andFireArea10BoundaryEvaluation9-1089-1139-1199-1249-1299-1349-1409-1459-1519-1649.279.28FireArea24andFireArea25BoundaryEvaluation9-168FireArea61andFireZone5BoundaryEvaluation9-1729.29FireArea105andFireAreas33,33A,33BBoundaryEvaluation9-176Page9-4 FireAreaContainingFireZones3,32,36,48,49,50,51,52,69andFireAreas106,107,31,35and146BoundaryEvaluationFireZones62A,62Band62CBoundaryEvaluati'onFireZones63A,63Band63CBoundaryEvaluationFireZone6AtoFireZone138BBoundaryEvaluationFireZone36toFireZone5BoundaryEvaluation9-1819-1859--1929-1999-204FireZone108toFireZone33ABoundaryEvaluation9-'210FireZone109toFireZone34ABoundaryEvaluation9-217FireZone32toFireZone5BoundaryEvaluationFireZone~69toFireZones108and109BoundaryEvaluationFireZone70toFireZone129BoundaryEvaluationFireZone7'toFireZone61BoundaryEvaluationFireZones51and37HVACDuctPenetrations9-2249-2319-2389-2419-246Page9-5 9.1FireZone43andFireZone91DuctEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafe.-shutdowncapabilityofanundamperedHVACsteelduct-thatpenetratesthewallbetweentheAccessControlAreaandthesoutheastportionoftheUnit1TurbineRoom(FireZone43andFireZone91,respectively).Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.DescritionFireZone43islocatedonthe609ftelevationoftheAuxiliary.Building.Itispart'f'largerfireareathatincludesFireZones37,.44N,44Sand44Athrough44H.FireZone91ispartofalargerfire.areathatincludestheentiretyoftheTurbineBuilding,alongwith'heMainSteamPipeTunnelsandwestValveHouses.Thebarrierseparatingthetwozonesisconstructed.ofreinforcedconcretecapableofachievingathree-hourrating;however,anundampered7-in.diametersteelductpenetratesthewallbetweenthetwozones.SafeShutdownEuimentFireZones,43and'1containcablesrequiredforsafeshutdownofD.C.CookUnit1.Shouldafireoccurineitherofthesezones,alternateshutdowncapabilitymeetingthecriteriaofAppendixRSectionIII.G.3isavailableoutsideofFireZone43.RedundantsafeshutdowncapabilitymeetingthecriteriaofAppendixRSectionIII.G.2isavailableoutsideofFireZone91.Page9-6 FireProtectionEuimentAnautomaticionizationdetectionsystemisinstalledbelowkthesuspendedceilinginFireZone43.AutomaticsuppressioncapabilityisnotprovidedinFireZone43.FireZone91isprotectedbyanautomaticwetpipesprinklersystem.AutomaticdetectionisnotprovidedcapabilitiesintheforminFireZone'91.Manualsuppressionofportableextinguishersandhosestationsareavailablefor.useinbothfirezones.FireHazardsAnalsisThebarrierseparatingFireZone43andFireZone91iscapableofachievingathree-hourfirerating;however,a7-in..diametersteelductpenetrating,thisbarrierisnotprovidedwith!afiredamper.Theundampered.7.-in.diameterHVACsteelductis>locatedinthewallseparatingFireZone,43from-FireZone91:.Fora.firetopropagatebetweenFireZone43andFireZone91,a-fireofsufficientduration-andintensitywould-berequiredto'.challengetheinherent,capabilitiesofthesteelductwork.Section3-3.2.1ofNFPANo.90ArequiresthatapprovedfiredampersshallbeinstalledwhereHVACductspenetratepartitionsrequiredtohaveafireresistanceratingoftwohoursormore.ThecombustibleloadinginFireZone43resultsinanequivalentfireseverityofunder60minutes.(Theactualfire'severity.existingatthistimeisunder56minutes.)ThecombustibleloadinginFireZone91resultsinanequivalentfireseverityofunder40minutes..(Theactual.fireseverityexistingatthis-Page9-7 timeisunder20minutes.)Assuch,therequiredfire'ratingofthebarrierseparatingthetwozonesisunderonehour.Therefore,perthecriteriaofNFPA90A,afiredamperisnotrequiredin.the7-.in.diametersteelductpenetratingthisbarrier.However,asthisbarrierisidentifiedasaboundaryfirebarrier,furtherjustificationisrequiredfornotinstallingafiredamperinthesteelduct.Thefollowingdiscussionprovidestheaddi.tionaljustificationIinstallingthefiredamper:Studiesoftheperformanceofsteel"ducts;::;.withandwithoutfiredampersunderanASTME-119fire,exposure,.were'arriedoutinDecember1982atUnderwritersLaboratories,Inc.,bytheThermalInsulationManufacturersAssociation.(TIMA).Twoseparatefiretests...inthewallfurnace=were"conductedonsteel'ucts....'hedemonstratedstructuralperformanceofsheetsteelductsinthefiretestprovidedadditionalevidenceforNFPA.90Atomaintain"titsprovisionthat'ofiredampersarerequiredwheresteelductspenetratewallshavingaone-hourfire,resistancerating....SteelductsintheTIMAfiretests,under.positive-pressurefire-testconditions,remainedintactonbothsides(thefireexposedandunexposedside)ofthewall.Bymaintainingitsstructuralintegrityintheone-hour-ratedpartitionopening,thesteelductactedasafirestopagainstthepassageofflamesandhotgasesforonehour--withorwithoutfiredampers...SteelductswithoutafiredamperprovidethesamefireprotectionasUnderwritersLaboratorieslabeledfiredampers,firedoors,andwiredglassfirewindows--torestrictthepassageofhotgasesandflames.(TemperaturefornotPage9-8 onthesideawayfromthefireisnotafactorinthepass/failtestcriteria'oftheseassemblies;i.e.,firedamyers,firedoorsandwiredglassfirewindows.)Pleasenotethatthedimensionsoftheductworkreferredtointhesestudieswere10in.by10in.,whichislargerthantheductreferencedinthisevaluation.ConclusionBasedontheprecedingevaluation,reasonableassuranceisdprovidedthatafireinFireZone43orFireZone91wouldnotimpairthesafeshutdowncapabi"litiesofD.C.CookUnitl.Inaddition,this,evaluationdoesnotadversely.impactonotherevaluationsorexemption-requestscontained'inthis.report.Thebaseswhichjustifythisconclusion'are.summarized.asfollows:(1)FireZone43.has.anequivalentfireseverityofunder60minutes,whileFireZone91hasanequivalentfireseverityofunder40minutes.(2)Basedonthecombustibleloadingandequivalentfire.severitiesoneithersideofthebarrierseparating,FireZone43andFireZone91,abarrierwithaone-"hourfire,ratingissufficienttoseparatethetwozonesbaseduponthehazardstowhichtheycouldbeexposed.(3)Section3-3.2.1ofNFPA90ArequiresfiredamperainHVACductpenetrationsiftherequiredfire'ratingof'hebarrieristwohoursormore.(4)StudiesoftheperformanceofsteelductswithoutfiredampersunderanASTME119fireexposureofonehourrevealthatsteelductsprovidethesamefireprotectionaslabeledfiredampers.1/"FireResearchforHVACSystems,"RichardG.Gewain,TheConstructionSecifier,April1984,pp.64-69.Page9-9 t(5)The7-in.diameterductpenetratingthebarrierj.sofsteelconstruction.(6)Installingalabeledfiresteelductpenetratingthefireratingwould-notprotectionprovidedbythedamperinthe7-in.diameterbarrierrequiringaone-hoursignificantlyenhancetheexistingconfiguration.9.2,FireArea54andFireZone73DuctEvaluation~PuruseThepurposeofthisevaluationistoanalyzetheimpacton13redundantsafeshutdowncapabilityofanundamperedHVACsteelductthat.penetratesthe'floor/ceilingassembl'ybetween-the-Upit2ControlRoomandUnit2HVACEquipmentRoom(FireArea54andFire.Zone73,,respectively).Inaddition,thisevaluationdoesnot,adversely.impact'onotherevaluations-orexemptionrequestscontainedin.this'report.FireArea54is.locatedonthe633ftelevationoftheAuxiliaryBuilding.FireZone73islocated,directlyaboveonthe650ftelevation.FireZone73ispartofalargerfireareathatincludesFireZones70,71and72.ThebarrierseparatingFireArea54andFireZone73isconstructedofreinforcedconcretecapableofachievingathree-hourfirerating;however,a6-in.diameterundamperedHVACductexhaustsairdirectlytotheoutsidefromtheUnit2ControlRoomtoiletthroughtheHVACEquipmentRoomabove.Page9-10 SafeShutdownEuiment~~FireArea54containscontrolandinstrumentationcablingforsafeshutdownofD.C;CookUnit2.ShouldafireoccurintheUnit2ControlRoom,completealternateshutdowncapabilitymeetingthecriteriaof.AppendixRSectionIII.G.3isprovidedoutsideofthefirearea.FireZone,73andthefireareainwhichitislocatedcontainnosafeshutdownequipmentcablesorcomponents.FireProtectionEuiment.;~Automatic.areaydetectionis..provided-inFireZones70and73,,withautomaticthermistordetection.andmanualdelugewaterspraysystemsprotecting.charcoal'-,'ilterunits'n.thesetwo'zones.FireZones-71and72.areprovided,with'ullareadetection,andautomaticHalon,1301,suppression'ystems."FireArea54isprovidedwithanautomatic'ionizationdete'ct.ion.system.aboveandbelowthesuspended,ceiling.Automaticsuppression'apabilitiesarenotprovidedinFireArea54.ManualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinFireArea54.FireHazardsAnalsisTheundampered6-in.diameterHVACsteelductislocatedinthefloor/ceilingassembly.separatingtheUnit2ControlRoom::toiletfromtheUnit2HVACEquipmentRoomabove.Forafiretoimpactonredundantsafeshutdown.capability,thefirewouldhavetospread,betweentheUnit1andUnit2ControlRoomsonthe633ftelevationthroughthe6-in.diameterexhaustducttoFireZone73onthe650ftelevation.Page9-11 ThecombustibleloadinginFireArea54resultsinanequivalentfireseverityofunder35minutes,withanegligiblecombustibleloadinginthetoilet.(Theactualfireseverityexistingatthistimeisunder23minutes).Smokeandhot.gasesfzomafireinFireArea54couldenterthecharcoalfilterunitsinFireZone73,through-thefilter.unitsreturnductuntilthef,jz'edampercloses.ThecharcoalfilterunitsinFireZone73azeprotectedbyautomaticthermistordetectionandmanualdelugewaterspraysystems.Shouldsufficientheatenterthecharcoalfilterunitstoignitethe,"charcoal,theautomat'ic'hermi'stordetectionsystemwillactivatealarmsin-theControlRoom.Uponarrivalofthefirebrigade,-thedelugewaterspray'systemcouldbeactuatedto.control."and/or-extinguishthefire."ReasonableassuranceisprovidedthatafireofthistypewillnotspreadtotheremainderofFire-Zone73.orthe'ireareainwhichitislocated.FireZone73has.acombustibleloadingresulting.inanequivalentfireseverityofunder20minutes.(Theactualfireseverityexistingatthistimeisundersevenminutes.)ThecombustibleloadingfortheentirefireareainwhichFireZone73jslocatedresultsinanequivalentfireseverityofunder35minutes.(Theactualfireseverityexistingatthistimeisunder25minutes.)ApreviousevaluationdealtwiththepotentialforfirepropagationbetweentheUnit1andUnit2ControlRoomsfromafireinFireZones70,71,72and73viaPage9-12 steelplateaccesshatchescoatedwithpyrocrete(seeSection~~I9.5,"FireZones70and73HatchEvaluation").Thus,theonlyconcernaddressedhereisthepotentialforafireinFireZones70,71,72and73topropagatedowntheundamperedHVACexhaustducttotheUnit2ControlRoomtoilet.ShouldafireoccurinFireZones70,71,:72and73,thepotentialexistsforfiretospreaddowntheexhaustductintotheUnit2ControlRoomtoilet.Twofactstendtominimizethispossibility.Oneisthatthedirectionofairflowisfromthetoiletdirectly.to@he'utsidethroughFireZone73.Thesecondisthatautomaticthermistordetection-andmanualdelugewater'praysystemsprotectthecharcoalfilterunits.Thesuppression'ystems.wouldcontroland/or'xtinguish>any'-fires-thatspreadintothecharcoalfilterunitsfrom-afirein.FireZones70,71;~72and73.ShouldfirespreadintotheUnit,2ControlRoomviathe6-in.diameterundamperedHVACexhaustduct,alternateshutdowncapabilitymeetingthecriteriaofAppendixRSectionIII.G.3isprovidedoutsideofthearea.ApreviousevaluationindicatesthatfirewillnotspreadfromFireZones70,71,72and73into'heUnit1ControlRoom;therefore,the'undamperedHVACducttotheUnit2ControlRoomtoiletdoesnotimpactonredundantsafe.shutdowncapability.Page9-13 ConclusionBased.onthepreviousevaluation,reasonableassuranceisprovidedthatafireinFireArea54orFireZones70,71,72and73wouldnotimpairthe.safeshutdowncapabilitiesofD.C.CookUnit2.Inaddition,,thisevaluationdoesnotadverselyimpactonother.evaluationsor-,exemptionrequestscontainedinthisreport..Thebasesthatjustifythisconclusionaresummarizedasfollows:(2)(3)(4)Fire'Area54containscontrolandinstrumentationcablingforsafeshutdownofD.C.CookUnit2;however,no.safeshutdownequipmentcables'rcomponentsare.providedinFireZones70,71,72and73.CompletealternateshutdowncapabilityisprovidedforFireArea.54.SincetherearenosafeshutdownequipmentcablesorcomponentsinFireZones70,71,72and73,'herewillbenoimpacttosafeshutdowncapabilityshouldafireinvolvebothfireareas.Theautomaticthermistordetectionandmanualdeluge.waterspraysuppressionsystemsinthecharcoalfilterunitsinFireZone73,alongwiththedirectionofairflowfrom-thetoiletintheUnit2"ControlRoomdirectlytotheoutside,providereasonableassurancethatafirewillnotspreadthrough.thecharcoalfilteruniteitherdownintoFireArea54orupintoFireZones70,71,72and73.ShouldafirepropagatebetweenFireArea54(Unit2ControlRoom)andFireZone73andspreadbeyondthecharcoalfilterunits,Section9.5evaluation(titled,"FireZones70and73HatchEvaluation")demonstratesthatafireinvolvingFireZones70,71,72and73wouldnotpropagatedownintotheUnit1ControlRoom(FireArea53).(5)Installingalabeledfiredamperinthe6-in.diameterHVACexhaustductfromtheUnit2ControlRoomtoiletdirectlytotheoutsidethroughtheHVACEquipmentRoomabove-wouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.Page9-14 9.3CCWPumAirSu1DuctEvaluation(FireZone44S)~PuruseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofthecommon'upplyairduct,fortheUnit1,Unit2andspareCCWpumpslocatedatelevation609ftoftheAuxiliaryBuilding..in.,FireZone44S..Inaddition,.thisevaluationdoesnotadverselyimpactonotherevaluationsor,exemptionrequestscontainedinthisreport.DescritionThesupplyduct.originatesatthe,AuxiliaryBuildingairsupplyfanslocatedinFireZone52atelevation633ft.Fromthesupplyfans,airtravelsdowntoelevation609ftviaanenclosedverticalchasealongthe.westwalloftheAuxiliaryBuilding.Onelevation609ft,coolingairissupplied,.totheCCWpumpsviaamain.supply.ductrunninghorizontallyinthe'ast-west,directiontothevicinityof,theCCWpumps.Aseparate4ftx3ftairsupplyhoodisprovidedforeachCCWpumpandissuppliedfromabranchductoriginatingfromthemainsupplyduct.ThisevaluationaddressesthepotentialforcommunicationoffirebetweentheCCWpumpsviatheseassociatedsupplyducts.SafeShutdownEuimentFireZone44ScontainsallfourCCWpumpsforUnits1and2,thespareCCWpump,the.twoUnit2CCWheatexchangers,theUnit2CCWpumpsuctionvalves,'nit2CCWheatexchangeroutletvalves,,Unit2CCWcommonserviceheadervalves,Unit2CCWtoPage9-15 RHRheatexchangervalves,Unit2ESWtoCCWheatexchangerinletvalves,Unit2ESWtoCCWheatexchangeroutletandUnit2MCC2-AZV-A.Withtheexcept-ionofthecomponentcoolingwaterpumps1PP-lOE,1PP-lOWandassociatedpowercables,therearenoUnit1>-cablesorcomponentsinFireZone44Swhichareessent.ialfor;;-safeshutdown.Duetocross-'tiecapabilities,anytwoofthefiveCCWpumpsareadequatetoachieveandmaintainshutdownconditionsforbothunitssimultaneously.TheremainingsystemsofUnit1usedforalternateshutdownforUnit2areoutsideof~thisfirezone.'FireProtectionEuimentTheCCWpumpareaisprovidedwithbothceilingmounted.ionizationdetectorsand,anautomaticpreactionpilotsprinkler;system.Inaddition,sprinklerheadsandpilotheadheatdetectorshavebeenlocatedandspacedtoprovideenhancedcoverageoftheCCWpumps.Thiscombinationofceilingmountedsprinklersandsprinklersdirectlyoverthepumpsthemselvesprovidesreasonableassuranceagainstdamagetoredundantpumpsasaresultofafireoccurringinthevicinityofthepumps.FireHazardsAnalsisThegeneralarea(FireZone44S)containingthepumpshasanequivalentfireseverityofunder25minutes.(Theactualfireseverityexistingatthistimeis14.2minutes.)TheimmediateareaofthepumpshasacomparativelylowfireseverityPage9-16 sincetheprimarysourceofcombustionisthe25gallonsoflubeoilcontainedwithinthefiveCCWpumpunits.Thereis,however,noreadilyavailablesourceofignitionforthislubeoilintheeventofaleak.TheflooraroundeachoftheCCWpumpsiscurbedinsuchamannerthatoilleakingmotorwillbeconfinedbytheboundaryoftfromanyonepumporhecurbing.Thus,theoftheleak.inthepumpareaisoilisconfinedtotheimmediatevicinityTheresultantdamageofanyfirelimited.Athree-hourfire-ratedbarrierhasbeenerectedtoprev'ent"thespread'offire-between-the,.Unit1,Unit2andsparepumps.Thebarrierisofsteelconstructioncoatedwitha"'fireprotectivematerialtoachieveathree-hourfirerating.'tislocatedbetweentheUnit1and'nit,2'pumpsintheeast-westdirectionandalsoextendsNorthbetween'heUnit'eastpumpandthesparepump.Figures9.3-1,9.3-2'and9.3-3depict'thelayoutandconfigurationofthisbarrier.,Afiredetectionandsuppressionsystemhasbeenprovidedtoassurereliableandquickresponsetothermalconditionsintheareaofthepumps.Pilotheadheatdetectorsandsprinklerheadshavebeenpositionedaroundeachpumpfordirectwaterapplicationontothepump'sbearings(hotsources).ThisisinadditiontothedetectionandsuppressionsystemusedinFireZone44Sforgeneralareacoverage.TheapplicationrateofsuppressionontotheCCWpumpbearingsisatahigherdensitythanthesystemprotectingthegeneralareaof.FireZone44S.Page9-17 Intheeventofafire,smokeandhotcombustibleswouldtendtorisetoceilinglevelandstratify.TheceilingheightintheimmediatevicinityoftheCCWpumpsis10ftllin.TotheeastoftheCCWpumps,theceilingheightincreasesto20ft4in.Figure9.3-3,depictstheceilingheightswithrespecttot'eCCWpumps.'norderforanysignificantamountsofsmokeandhotcombustiblestoimpactonredundantCCWpumps,abuild-upofsmokeand-hotcombustibleswouldh'avetoocc'urfillingtheceilingareafirstandthenaccumulatinginadownwarddirectionuntilitreachedthe"levelofthepumps.Due'to"the'~volumeofh'igherceilingarea,of'heceilingheights,itishighlyimprobablethatsmokecould-"stratify=downtothelevelofthepumps;therefore,.theonly.potential'orheatandsmoketransmissionfromone.pump'o'notherisviathesupplyductworkitself.-The4ftby3ftsupplyairhood,foreachCCWpumpisapproximately6inchesfromthe-topsurface.ofthepumpmotor.Whentheairsupplyunitsareoperating,supplyaircomingouttheductwilllimitsmokepropagationintotheduct.Whentheairsupplyunitsarenot,operating,smokeandcombustiblegasesfromafireinthevicinityofapumpwouldhavetoriseupthroughthesurroundingareaaroundtheperimeterofthehood,intothehooditself,andthenintothebranchductofagivenCCWpump.Smokewouldhavetotravelthroughthebranch.ducttothemainsupplyductandthentraverseintoabranchductofaPage9-18 secondCCWpump.ItwouldthenhavetomovedownthebranchductandfinallyexitfromthehoodlocatedoverthesecondCCWpumpmotorpriortoimpactingonasecondCCWpump.Thisrepresentsatortuouspathwhichfiremusttakeinordertoimpactonredundantpumps.Thisconfigurationprovidesreasonableassurancethatafireinthevicinity.ofoneCCWpumpwillnotadverselyimpactonthecapabilitiesoftheotherredundantCC5pumpstoachieveandmaintainsafeshutdownconditions.Theverticalportionofthemainsupplyairrundoesnotconta'in'fire'damperstherebyprovidingadirectpath.ofcommunica'tionbetweenFireZone52on,,elevation633ftandFireZone44Sonelevation"609.ft.TomaintaintheboundaryfirpbarrierbetweenFireZones52..and'44S,athree-hour-ratedfire/damper,willbeinstalledat'.the'.top,ofthevertical.portionofthesupplyairrun.Conclusion~'-...Based;on.the..previousanalysis,afire-rateddamperisrequiredatthepointwherethemainductentersatthetopoftheairshaftfromFireZone52onthe633ftelevation;however,fire-rateddampersarenotrequiredatanyofthebranchductstothe'CWpumpsupplyairhoods.Thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)ThereisessentiallynocombustiblematerialinthevicinityoftheCCWpumps,otherthanlubeoilPage9-19 containedwithinthepumps..Iftheoilwithinthepumpswereto'spillontothefloor,thereisnoreadilyavailablesourceofignition.(2)Theresultantdamagefromafireinthepumpareawouldbelimiteddueto(a)thethree-hourfirebarrierseparatingthepumpsand(b)thequickresponseofthedetectionandsuppressionsystemsatboththeceilingandpumplevels.(3)"Smokeandhot'ombustibleswouldcollectwithinthebeampocketsatthe10ftllin.highceilinglevelimmediatelyovertheCCWpumpsandthentendtoflowupintothe20ft4in.highceilingspace.ThiswillpreventastratifiedlayerofhotgasesfromformingtoadepthsufficienttodamagetheCCWpumpsunaffectedbythedirectresultsofthefire.(4)Duetotheclose-proximityofthe-hoodtothetop*surfaceoftheCCWpumpmotor,thesurroundingareaaroundtheperimeterofthehoodthroughwhichsmokeandhotcombustibleswould.havetopassisseverely'.limited.*"(5),Toimpact"onredundantpumpssimultaneously,'mokeandhotgaseswouldhavetoenterthesupplyairhood:.',directlyoveroneCCWpump,'ravelthroughthebranchductinto,the,mainsupplyduct,travelthroughthebranch'duct.ofasecondCCWpump,andthentraveldownthatpump's.supplyairhoodtoimpactonthepumpmotor.Thisrepresentsa'tortuouspathwhichfiremusttravel,therebyprovidingreasonableassurancethatafireinthevicinity,,ofone~,pump.will..notadverselyimpactontheabilityofredundantpumpstoachieveandmaintainsafeshutdownconditions.Page9-20 9.4Auxiliar.BuildinVerticalAirShaftsEvaluation(FireAreas12and22)~PuroseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityoftwoverticalairshafts,locatedintheAuxiliaryBuilding,thatextendfromthe573ftelevationtojustbelowthe650ftelevationwithdamperedandundamperedventilationopenings.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontained'in'this'report.TheUnit1airshaftlocatedinFireArea12'risesverticallywithinFireArea12andabutsthe-various'AuxiliaryBuildingpumpand.exchangercubicles(e.'g.;'charging,'HR,CTS-,,safetyinjection,etc.)extendingfromthe573;ftelevationtojustbelowthe650ftelevation.,Similarly,theUnit2airshaftlocated'-,inFire.Area22risesvertically.withinFireArea22andabutsthevariousAuxiliaryBuildingpumpandexchangercubicles.Atthe573ftelevation,anundamperedairexhaustduct(approximately1ftby2ftinsize)takesairfromeachUnit1containmentspraypumpcubicle(FireZones1Aand1B)anddischargesthisairintotheUnit1airshaft.Similarly,theUnit2airshaftandcorrespondingpumpcubicles(FireZoneslEand1F)containthesametypeandnumberofundamperedexhaustducts.TheUnits1and2RHRpumpcubicles(FireZones1C,1D,Page9-21 1GandlH)containathree-hour-rateddamperintheexhaustductwhichdischargesairintotheairshafts.Atthe587ftelevation,an'ndamperedexhaustduct(approximately2ftbyl-l/2ft)commontoeach'Unit1safetyinjectionpumpcubicle(FireZones64Aand64B)takesairfromeachofthecubiclesanddischargesthisairintotheUnit1.airshaft.Inaddition,undamperedexhaustductstakeairfromeachofthethreechargingpumpcubicles(FireZones62A,62B,and62C)'nddischargethisairintotheUnit1airshaft.Similarly,theUnit2air=shaftandcorrespondingpumpcubicles.-(FireZones63A,'3Band:63C,'5Aand65B)containthesametypeandnumberofundampered"exhaustducts.'At':the609'.ft-elevation,.undamperedexhaustductstakeairfromtheUnit.'1RHRandcontainmentsprayheat.exchangercubicles(FireZones"44Athrough44D)anddischargethisairintotheUnit1airshaft.The'xhaustductsarelocatedjustbelowtheceilingoftheairshaft,nearthe650ftelevation.Similarly,theUnit2airshaftandcorrespondingexchangercubicles(FireZones44Ethrough44H)'ontainthesametypeandnumberofundamperedexhaustducts.TheexhaustairdischargedintotheUnit1airshaftflowsupwardstothe633ftelevationwhereitisexhau'stedfromtheAuxiliaryBuildingbytwoairexhaustfans(1HV-AES-1and1HV-AES-2)locatedinFireZone49.Althoughthefanunitshavemanuallyoperateddampersforflowcontrol,therearenofire-Page9-22 rateddampersattheairshaft'snorthwallwheretheairleavestheshafttoentertheexhaustfanunits.Similarly,theUnit2airshaftexhaustsairatthe.633ftelevationthroughtwoairexhaustfans(2HV-AES-1and2HV-AES-2)locatedinFireZone50.Nofire-rateddampersexistattheairshaft'ssouthwallwheretheairleavestheshafttoenterthe.exhaustfanunits.SafeShutdownEuimentFireZones49and50arelocatedonelevation633ftandarecontainedinthefireareadefinedbyFireZones49,50,'51,52,3,31,32,35,36,~,48,69.,106,107,and146.SafeshutdownequipmentislocatedinFireZones50,52,69,106and107in-eludingl-CM0-429,2-CMO-429(CCWtoRHRheatexchangerisolationMOV),1-CCW-214,1-CCW-220,2-CCW-214,2-CCW-220(Unit1andUnit2CCWsurgetankmanualisolationvalve),MCCs1-AM-A,2-AM-A,l-AM-D,2-AM-D,andbatteryBNwithassociateddistributioncabinetDCN(Unit1andUnit2).VariouscablesarelocatedinFireZones32,50,51,52,69,106and107.FireZones3,31,35,36,48,49and146donotcontainanysafeshutdownequipmentand/orcables.Basedonthesafeshutdownsystemanalysis,intheeventofafireinthisarea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoringinstrumentation.However,theMarch1983submittalrecommendedtheadditionof,analternatesourcerangeneutronmonitoringchanneltoprovideindicationatlocalshut-downpanelLSI-4locatedinFireZone5.Page9-23 FireZones44Athrough44Hareandarecontainedinthefireareathrough44H,37,43,44Nand44S.locatedonelevation609ftdefinedbyFireZones44AThisfireareacontainsvarioussafeshutdownmotor'ontrolcenters,pumpsandredundantcables.AsrecommendedinSection8ofthisreport,variousmodificationswillbemadeinthisfireareatoensuresafeshutdowncapability.FireArea12atthe596ftelevation,whichincludesthe'Unit1airshaft,containssteamgenerator2and3supplyvalves(FM0-221,-222,-231,-232),containmentsump"'toRHRpumpsuction~valves(ICM-305,306),localshutdownindicationpanels(LSI-2,.'LSI-6),andvarioussafeshutdowncablesassociatedwiththese'"'equipment.TheCCW-toRCPthermalbarrierisolationvalvesare~alsolocatedin.thisfirearea'CCM-453,-454,-458,-459);(however,'hesevalvesarenotrequiredforsafeshutdownandwere;includedinthe=orig,inalevaluationforplantoperationalflexibility.AsconcludedbytheMarch1983submittal,atleastonepathofsafeshutdowncomponentsisavailableineachofthesafeshutdownsystems.FireArea22atthe596ftelevation,whichincludestheUnit2airshaft,containssteamgenerator2and3supplyvalves(FM0-221,-222,-231,-232)containmentsumptoRHRpumpsuctionvalves(ICM-305,306),localshutdownindicationpanels(LSI-2,LSI-6)andvarioussafeshutdowncablessimilartothosecablesfoundinFireArea12.TheCCWtoRCPthermalbarrierisolat,ionPage9-24 valves(CCM-453,-454,-458,-459)arealsolocatedinthisfirearea;.however,thesevalvesarenotrequiredforsafeshutdownandw'ereincludedintheoriginalevaluationforplantoperationalflexibility.AsconcludedbytheMarch1983submittal,atleastonepathofsafeshutdowncomponentsisavailableineachofthesafeshutdownsystems.FireZones64Aand64B(Unit1safetyinjectioncubicles)and65AandB(Unit2safety,injectioncubicles)arelocatedonelevation587ftandarecontainedinthefireareadefinedbyFireZones5,6A,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"cablesare'ocated<withinthisfire.area.AsrecommendedinSection8ofthis.-report,variousmodificationswillbemadeinthisfireareatoensureshutdowncapability.Unit1FireZones62A,62B,and62Cdefineafirearealocatedonelevation587ftwhichcontainstheUnit1RWSTtoCVCSpumpsisolationvalvesIM0-910,IMO-911;chargingpumpsPP-50E,PP-50W;charginglubeoilpumpsPP-50E(LO)andPP-50W'-'LO);minimumflowvalvesQMO-225andQMO-226;andchargingflowcontrolvalveQRV-251.Inaddition,varioussafeshutdowncablesarelocatedwithinthisfirearea.Intheeventofafirein'hisarea,theUnit1CVCSpumpswouldbelost.Sections5and8Page9-25 ofthisreportproposethecrossconnectionoftheplantCVCSsystemssuchthatthechargingfunctionsofthefireaffectedunitcanbemaintainedviathecrossconnectionoftheunaffectedunit'sCVCSsystem.All.othersafeshutdownsystemsareavailablein.the.eventofafire.Unit2FireZones63A,63Band.63Cdefineafirearealocatedonelevation587-ftwhichcontainstheUnit2RWSTtoCVCS'pumpsisolationvalvesIM0-910,IMO-911;chargingpumpsPP-50E,PP-50W;charginglubeoilpumpsPP-50E(LO),PP-50W(LO);andminimumflow'valvesQMO-225,andQMO-226".Thiswouldresult'"'nthelossofthe-Unit.2CVCS'umps'n=theeventofafire.However,aspreviouslydescribed,thechargingfunctionsofthefireaffectedunit,can.bemaintainedviathecrossconnectionoftheunaffected.unit's.CVCS'system.'--Variousothersafeshutdowncomponentsand.cables,.associated'withtheauxiliaryfeedwater,EPSandRCSsystems.arealso,locatedinthisfirearea;however,atleastonepathofsafeshutdowncomponents.isavailableduringa.fire.FireZones1A,1B,1Eand1Farelocatedonelevation573ftandarecontainedwithinafire'readefinedbyFireZones1,lAthr'ough1H,136,137,138A,138Band138C.ThisfireareacontainsRHRpumpsPP-35EandPP-35WandRHRpumpsuctionvalvesIMO-310andIMO-320forbothunits.Inaddition,varioussafeshutdowncablesarelocatedwithinthisfirearea.Section8ofthisreportrecommendscertainmodificationswhich,afterPage9-26 installation,willensurethatatleastonepathofs'afeshutdown~~~~componentswillbeavailableforallsystems.FireProtectionEuimentFireZone1.contains~~anautomaticdetectionsystemforthegeneralcorridorarea.Section8ofthisreportrecommendsthattheRHRandCTSpumpcubiclesbeprovidedwithautomati'cdetectionincludingremotealarmingcapabilityintheControlRooms,andtheinstallationoffiredampersintheboundaryofthe:RHRpumproomstotheverticalairshaftsinFireAreas12,and22.Italsorecommendsthat;automaticsprinklersbelocated.aroundtheperimeteroftheopenstairwaytothe587ftelevationtoensurethe'integrityofthe.barrierseparatingthesetwdelevations.Theserecommendationshavebeen.implemented."Thefire,areaat-the587ft0in.,'and601ft0"in..elevation.oftheAuxiliaryBuildingisdefined'yFire,Zones5,6A,6N,"6M,>6S,'64A,64B,65Aand65B.,With,theexceptionofFireZone6A"(601ftpipetunnel),thesezonescontainbothautomaticdrypilotpreactionsprinklers(includingprotectionofstairwaystoadjacentelevations)andionizationdetection.ThefireareadefinedbyFireZone62A,62Band62C(Unit1'hargingpumpcubicles)preactionsprinklersandcontainsbothautomaticdrypilotionizationdetection.Similarly,thefireareadefinedbyFireZones63A,63Band63C(Unit2charging-pumpcubicles)containsbothautomaticdrypilotpreactionsprinklersandionizationdetection.Page9-27 FireAreas12and22donotcontaineitherautomaticsuppressionordetectionsystems.ThefireareadefinedbyFireZones37,43,44N,44Sand44Athrough44HcontainsautomaticdetectioninFireZones37,43,44Nand44S.Automaticdrypilotpreactionsprinklers,includingprotectionofstairwaystoadjacent'levations,areprovidedinFireZones44Nand44S.ThefireareadefinedbyFireZones3,31,32,35,36,48,49I5051I5269106107detectioninFire.Zones32,48,49,and14'ontainsautomatic50,51,52,69,106'ndi'.107'.OnlypartialcoverageisprovidedinFireZone3.Nodetectioncoverageis.providedinFireZones31,35,36and146.Thermistors.are-also.provi:dedfor'thecharcoal".filterunitsinFireZones,49,,50and69.'utomaticdrypilotpreactionsprinklersare-containedinFireZones*32,51'and52withpartialcoverageprovidedinFireZone3.Amanual'delugesystemisusedforthecharcoalfilterunitsinFireZones49.50and69.FireHazardsAnalsisThecombustibleloadingsforalloftheabovefireareasareindicatedbythefollowing:FireAreaorFireZonesComosinaFire-AreaAreaFireSeverity(Minutes)FZs1,1Athrough1H,136,137I138A138B138C15Page9-28 FZs3,32,36,48,49,5051,52,69,106,107,146FZs5,6N,6A,6M,6S,61,64AGB,65A&B12(includingairshaft)22(includingairshaft)FZs3743g44Ng44Sg44Athrough44H2520151035FZs62A,B,CFZs63A,B,C3535Eachoftheai~rexhaustductpenetrationsfromthechargingpumpcubicles(FireZones62A,62B,62C,63A,63Band63C)intotherespectiveunit'sairshaftare-tobeupgradedwiththree-,.hour-ratedfiredamperstomaintainthefireratingofthefire'areaboundaryinwhichthepenetrations,-arelocated.Thiseliminatesthecombustibleloadingofthechargingpumpcubiclestobeconsideredinthisevaluation.Productsofcombustionfromanyofthefireareasboundingeitherverticalairshaftmustpassthroughitsassociatedairshaftinordertocommunicatewithanotherfirearea.Smoke'ndhotcombustiblesenteringeitherairshaftwouldtendtostreamupwardstothetopoftheshaft.Inorderforanysignificantamountsofsmokeandhotcombustiblestoimpactonsafeshutdowncomponentsandcablesinotherfire'areas,abuild-upofsmokeandhotcombustibleswouldhavetobankdownuntilitreachedtheundamperedductpenetrations.Thisbuild-upofcombustionproductswouldbePage9-29 limitedbytheexhaustfanslocatedinFireZones49and50forUnits1and2respectivelywhichruncontinually.Undernormalconditions,thesefanswoulddissipatetheproductsofcombustiontotheoutsidebeforeabuild-upcouldtakeplace.Iftheseair-exhaustfanswerenotinoperation,combustionproductscould'begintobankdownandentertheundamperedexhaustductsstartingwiththeductsatthetopoftheshaft.Theamountofthecombustibleloadingineachofthefireareasofconcern,alongwithlackofexhaustcapability,wouldmaketheaccumulationofsignific'antamountsofcombustionproductsdifficultifnotimpossible-withintheairshaftespeciallyat'thelowerelevationexhaustducts.Inaddition,asproductsofcombustionpassthroughei'therverticalairshaftintootherfire'areas,thehotcombustibleswould.tendtonaturallycooldown+overthislengthypathoftravel.Thefollowingscenariosareprovidedtoillustratethecircuitouspathrequiredtoimpactredundantsafeshutdownequipmentineachofthefireareasconcerned.Elevations633ftand650ftThefire,areadefinedbyFireZones3,31,32,35,36,48,'49,50,51,52,69,106,107,and146islocatedatvariouselevationsoftheplant,includingelevations587,609,630,633and650ft.OnlyFireZones49(Unit1HVACvestibule)and50(Unit2HVACvestibule)abuttheairshaftswithoutfiredampers.EachfirezonecontainstwoengineeredsafeguardsystemPage9-30 ventilationfanswhichtakeairfromtheirrespectiveair'shaftandexhaustitthroughaductfrom=theAuxiliaryBuildingroof.Sincethereisnofire-rateddamperattheairshaftductpenetrationforeachfan,productsofcombustionmayenterFireZones49or50.Inorder'orafiretobetransmittedfromtheairshafttoeitherfirezone,oneorbothventilationfansmustbeoff.,Productsofcombustionmustthenenter'heairshaftductpenetrationsandescapeintoeithertheventilationfansortheirassociatedductsinto-eitherFire=Zone49or50.FirewouldthenhavetotravelfromeitherFireZone49or50totheotherfirezonescontainedinthefirearea..Itisunlikelythatafirecouldbeinitiatedinthismannerandthenengulftheentirefirearea.Aspreviouslydiscussed,FireZones32,50,,51,52,69,106and107aretheonlyfirezonesinthefireareacontainingsafeshutdownequipmentand/orcables.Thesefirezonescontainautomaticdetectionsystemsforgeneralareadetection,withCthermistorsandamanua'1delugesystemalsoprovidedforthecharcoalfilterunitsinFireZones49and50.FireZones49through52arenotprotectedbyautomaticdrypilotsprinklersystems;however,Section8ofthisreportrecommendedanautoma-ticdrypilotsprinklersystembeinstalledinFireZones51and52.Thesemodificationshavebeenimplemented.Thisfireareahasacombinedfi.reseverityof25minutes.Theactualfireseverityexistingatthistimeisunder13minutes.Page9-31 InorderforafiretotravelfromeitherFireZone49or50toFireZones3,31,32,35,36,48,69and146,thepathmustbe"throughtheunratedpenetrationsbetweenFireZones49and69orbetweenFireZones50and69.Sincetheonlypathtotheseother'"firezonesisthroughunratedand/orunsealedpenetrations"leadingtoFireZone69,thispathisrestricted.(Itis<restrictedduetothepresenceofbarrierswithpenetrationswhichmayormaynotbesealed.Thispresentsmorerestrictionsthanwouldexistifthebarrierdidnotexistatall.)FirecouldalsospreadfromFireZone49'o52to51orFire."Zone50to52to51,andthenspreadeitherintoFireZones106(and107orupintoFireZone69.FromFireZone69,firecould,~Shen.spreaddownintoFireZones32,35,36,48,3and146,which;areconnectedtoFireZone69onlowerelevations.Whileitis>crediblethatfirecouldspreadfromeitherFireZones49or50ptoFireZones51and52,theautomaticdetectionanddrypilotsuppressionsystemsinbothfirezoneswillacttolimitfirespreadtoeitherFireZones51and52orotheradjacentfirezones.Themoredirectandplausiblerouteisdirectlyfromeither,FireZone49or50directlyupintoFireZone69andfromFireZone69totheadjacentfirezones.FireZones69,32and48areprovidedwithautomaticdetectionandpartialdetectioncoverageisprovidedinFireZone3.DrypilotpreactionsuppressionsystemsareprovidedinFireZone32withpartialcoveragePage9-32 providedinFireZone3.Inaddition,FireZone69isprovided~~withamanualdelugesystemfortheHVACcharcoalfilterunits.IntheunlikelyeventthathotcombustiblesshouldenterFireZone69fromeitherHVACvestibuleandthenenterthecharcoalfilterunitandignit'ethecharcoal,thefireprotectionsystemsprovided~oulddetectanduponactuationwillextinguishthefirewithintheunit.Therefore,damagetosafeshutdownequipmentduetothetransmissionoffirebetweentheairshaftsandthisfireareaisnotacredibleevent.Elevation609ft'Productsofcombustionenteringthe,fireareadefinedbyFireZones37,43,44N,44S,.and44Athrough44Hwouldenter-.throughundamperedductpenetrations.in'theCTS/RHRheat"exchangercubiclesjustbelowthe650'ftelevati'on.FireZones44Athrough44Heachcontainanexhaustpenetrationinacommon:wallwithitsrespectiveairshaft.Unit1FireZones44Aand44Bdonotcontain,anysafeshutdowncomponentsorcables.Unit2FireZones44Eand44FcontainnosafeshutdownequipmentandonlyafewcablesassociatedwiththeCVCSflowcontrolvalve(QRV-251)andtheCVCSpumpsuctionisolationvalve(IM0-911).Unit1FireZones44C,44DandUnit2FireZones44G,44HcontaintheRHRheatexchangers,valvesandassociatedcables.Sincealloftheabovefirezonesadjacenttotheairshaftscontainmostlymechanicalequipmentandpiping,thecombustibleloadinginthesefirezonesislow.Asaresult,theCTSandRHRheatexchangerPage9-33 cubiclesarenotaprimarysourceofignitionforanyhotcombustibleswhichmightenterthecubiclesviatheexhaustpenetrations.NoneoftheCTS/RHRheatexchangercubiclescontaineitherautomaticdetect'ionorsuppressionsystems.However,afireinFireZones44Athrough44Hwouldimpactonlycoldshutdown.valveswhich.couldbemanuallyoperatedbyplantpersonnel.FireZones37,'3,44Nand44Sareprovidedwithautomaticdetect.ionsystems.Anautomaticdrypilotpreact,ionsuppressionsystemhasbeenprovidedforFireZones44Nand44S.Forfire'oimpactonthesefirezones,itwouldhavetospreadintothezonesfromtheverticalairshaftsviatheheatexchangercubicles.,Theexhaustductstotheheat-exchangercubiclesarelocated.justbelowelevation650ft,withthetopof'theentrancedo'ortoeach'cubicle"locatedatapproximatelyelevation616ft.Productsofcombustionwouldhavetobankdowntothelevelofthetopofthedoorsin-ordertospreadout.intoFireZones44Nand44S.Thisisnot.consideredacredibleevent.However,anyproductsofcombustionorfireemanatingfromtheCTS/RHRheatexchangercubicleswouldbedetectedandextinguishedbythesefireprotectionsystemsinFire.Zones44Nand44S.Therefore,damagetosafeshutdownequipmentduetothetransmissionoffirebetweentheairshaftandthisfireareaisnotacredibleevent.Elevation587ftTheductpenetrationsenteringtheSafetyInjection(SI)cubicles(Unit1FireZones64Aand64BandUnit2FireZones65APage9-34 and65B)arelocatedatapproximatelythe587ftelevation.AsingleductpenetrationineachairshaftissharedbybothSIpumpsofaunit.Acommonductextendsfromthepenetrationtoeachofthepumpcubicleswhereairistakenfromthecubicleareaandexhaustedintotheshaft.TherearenosafeshutdowncomponentslocatedintheSIcubicles.However,thesecubiclesare,partofafireareacontainingvarioussafeshutdowncomponentsandcables.FireZones5,6A,6N,6Mand6SareadjacenttotheSIcubiclesofbothunitsandcontainsafeshutdown,components+.,suchaslocalshutdownindicationpanels,variousmotorcontrolcenters,distributioncabinets,chargingflowcontrolvalveandassociatedcables..Inorderforafiretobetransmittedfromtheairshafttothese,components,products.of-combustion:would*havetobe.generatedinsufficientquantitiesas,tofill,the="air'shaftfrom~approximatelythe650fttothe587ftelevationsoftheair..shaft.Thesmokeandhotcombustibleswouldhavetothenentertheundamperedexhaust'uctandexittheductabovetheSIpumps.ThesmokeandhotgaseswouldthenhavetoignitecombustiblesintheSIpumpcubiclesandthenspreadthroughtheSIcubicles,',~aroundthemissileshieldwall,andintoFireZone6N.Thisis,notacredibleeventduetothefollowingconsiderations:(l)BoththeSIcubiclesandFireZones5,6N,6Mand6Shavebeenprovidedwithautomaticdetectionanddrypilotpreactionsuppressionsystems.(2)Thisfireareahasinafireseverityacombustibleloadingthatresultsof20minutes.(TheactualfirePage9-35 severityexistingatthistimeisunder6.5minutes).(3)Thecombustibleloading'noutsideoftheSIcubiclestherestofthefirebrea.shutdownequipmentduetobetweentheairshaftandcredibleevent.theimmediatevicinitybutissignificantlylowerthanTherefore,damagetosafethetransmissionoffirethisfireareaisnotaElevation573ftProductsofcombustionenteringthefireareacontainingFireZones1,1A-1H,136,137,138A,138Band138Cwouldbeviathecontainmentspraypumpcubicles.Theaccessdoorsarescreenmeshforventilationpurposes;however,themissileshieldwalls,approximately14ftinlengthforminga"T"attheentranceways,extendbeyondthewidthofthedoorway.SincetheRHRpumpsandassociatedvalves.aretheonlyredundantsafeshutdowncomponentsinthisarea,afirewouldhavetopassthrough-theCTScubiclesandaroundthe.,missilewallsinto-a'ommonareabetweentheUni.t1and2'ubicles...(AfirecouldnottravelfromtheairshafttotheRHRcubiclesdirectlysincetheairductsbetweentheairshaftandtheRHRcubiclesareprovidedfire"'rateddampers.)ItwouldthenhavetoentertheRHRcubiclesbypassingaroundtheassociatedmissileshieldwalls.Inaddition,thepenetrationstoFireZoneslA,1B,lEand1F(the.CTScubicles)fromtheairshaftarelocatedatthelowestelevationoftheairshaft(approximately573ft).Inorderforcombustionproductstoenterthesepenetrations,smokeandhotcombustibleswouldhavetobegeneratedinsufficientquantitiesastofillFireAreas12Page9-36 and22includingtheirrespectiveairshafts.Thisisextremelyunlikelysincethecombustibleloadinginthefireareasofconcernislow.Therefore,transmissionof.firebetweentheairshaftandtheRHRcubiclesisnotacredibleevent.SstemsAnalsisTheabovefirehazardsanalysisdemonstratestheextremelyunlikelyscenariosrequiredforafiretobetransmittedsoastototallyengulfeitherairshaftandtheirrespectiveadjoiningfireareasatvariouselevations.Usingtheabovescenariosasabasis,asystemsanalysiscanbeperformedtodeterminetheimpactofafireonthesafeshutdowncapabilityoftheplant.Forthepurposesofthisanalysis,thefollowingassumptionsareused:(1)Theverticalairshaftsareacommonmeansofcommunicationoffireto,.allofthefireareasdescribedabove;however,itisnotcrediblethatal'1ofthesefireareasaresimultaneouslyengulfedbyfire.(2)Theonlyfireareasassumedtobeinvolvedin'afireatanytimearethefireareasdefinedbyeitherairshaft(i.e.,FireAreas12or22)and~onloneoftheother'ireareasadjacenttotheairshaftunderconsideration.(3)Consideringassumption(2)above,theworst-casescenarioisdefinedasafiretotallyengulfingeitherFireArea12or22andthentravellingthecircuitouspath(describedinthepreviousscenarios)inoneoftheadjacentfireareasuntilthefirereachesafirezonewithinthefireareacontainingasuppressionsystemcapableofextinguishingthefire.Thefiredoesnottravelanyfurtherwithinthefirearea.(4)Itisassumedthatthefirestartsatthe587ftelevation(i.e.,Quadrant2pipetunnelareaforbothPage9-37 units)oftheairshaftandthentravelsthroughtheverticalportionoftheairshafttotheunratedpenetrations.ThisisareasonableassumptionsincetheprimarysourceofcombustibleloadingforbothairshaftsislocatedintheQuadrant2pipetunnelofeachunit.Thefollowingisadiscussionofthesystemsanalysisfor'eachofthepreviouslydescribedscenariosusingtheabove'assumptions:Elevations633ftand650ftFireAreaContaininFireZones49,50,51,52,3,32,36,48,69andFareArea12or22ForafireineitherUnit1orUnit2airshaft(FireArea12orFireArea22respectively),itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZone49inUnit1orFireArea22andFireZone50inUnit2.F,Thisassumptionisbasedonthefollowing:(1)Afireoriginatingineitherairshaftmustproduceenoughproductsofcombustiontofillt,hetopoftheairshaft(i.e.,justbelowthe650ftelevation).Theproductsofcombustion,producedfromlowcombustibleloadingcontainedineachairshaj+t,willtendtobedispersedwithinthelargevolumeoftheairshaft.(2)Thehotcombustiblesproducedfromtheairshaftfirewilltendtocoolrapidlybecauseofthelowcombustibleloadingandlargevolume.(3)TheHVACexhaustairfanunitslocatedinFireZones49(Unit1)and50(Unit2)containdetectionanddelugesystemsassociatedwiththeircharcoalfilters.Thesedelugesystemsarecapableofextinguishinganyfireinthecharcoalbedswhichmayoriginateeitherinternaltoorexternaltotheseairfanunits.Page9-38 Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents(i.e.,equipmentand/orcables)onlyinFireArea12andFireZone49(whichcontainsnosafeshutdownequipmentorcables)forUnit'orinFireArea22andFireZone50forUnit2.ForboththeUnit1andUnit2systemsanalyses,itwasconcludedthatatleastonepathofsafeshutdowncomponentsexistsforeachsafeshutdownsystem.ThisevaluationfortheabovefireareasandfirezonesdoesnotaffecttheexistingexemptionrequestsconcerningtheAuxiliaryBuildingHVACDuctPenetrations(Section7.13)ortheContainmentSeismicGaps(Section7.14).Elevation609ftFireAreaContaininFireZones3743,44N,44S,44Athrouh44HandFireArea12or22Asimilarmethodofanalysismaybeusedfortheabovefireareas.ForafireineithertheUnit1orUnit2airshaft(FireArea12orFireAl"ea22respectively),itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZones44A,44B,44C,44DinUnit1orFireArea22andFireZones44E,44F,44G,44HinUnit2.,Thi:sassumptionisbasedonthefollowing:(1)As'previouslydiscussed,eachajrshafthasalowcombustibleloading(20,[00Btu/ftfortheUnitiairshaftand13,000Btu/ftfortheUnit2airshaft)which'willtendtodispersethroughoutthelargevolumeoftheairshaft.Page9-39 (2)Thehotcombustiblesproducedwilltendtocoolrapidlywithinthelargeai.rshaftvolume.(3)TheCTSandRHRheatexchangercubiclesarelargevolumesandcontainmostlymechanicalequipmentandpiping;thecombustibleloadinginthesefirezonesislow.Ifhotcombustiblesweretransmittedintothesecubiclesfromtheair,shaft(eitherUnit1orUnit2),itwouldbeextremelydifficultforafiretodevelopinanyofthesecubicles.Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents(i.e.,equipmentand/orcables)onlyinFireArea12andFireZones44Athrough44D,forUnit1orinFireArea22andFireZones44Ethrough44HforUnit2.ForboththeUnit1andUnit2systemsanalyses,'itwasconcludedthatatleastonepathofsafeshutdowncomponentsexistsforeachsafeshutdownsystem.Thisevaluationfortheabovefireareasandfirezonesdoesnotaffect.theexistingexemptionrequestsconcerningtheAuxiliaryBuildingHVAC-DuctPenetrations(Section7.13)ortheContainmentSeismicGaps(Section7.14).Elevation587ftFireAreaContaininFireZones56A6N,6M,6S,6164A,64B65A65BandFareArea12or22ForafireineithertheUnit1orUnit2airshaft,itisassumedforthepurposesofthisanalysisthatthefirewillengulfFireArea12andFireZones64A,64BinUnit1orFireArea22andFireZones65A;65BinUnit2.Thisassumptionisbasedonthefollowing:Page9-40 (1)Aspreviously'iscussed,eachajrshafthasalowcombustibleloading(20,)00Btu/ftfortheUnitlairshaftand13,000Btu/ftfortheUnit2airshaft)whichwilltendtodispersethroughoutthelargevolumeoftheairshaft.(2)Thehotcombustibles,producedwilltendtocoolrapidlywithinthelargeair=shaftvolume.(3)TheSafetyInjectionPumpcubicles(i.e.,FireZones64Aand64BinUnit1and65Aand65BinUnit2)arelargevolumes,withthefollowingcombustibleloadingvalues:FireZoneAssumedCombustibleLoadingforthisEvaluation(ActualCombustibleLoadin)64A64B65A65B27,000Btu/ft27,000Btu/ft27,000Btu/ft27,000Btu/ft'12,642(10,739(11,518(13,008Btu/ft2)Btu/ft2)Btu/ft2)Btu/ft)Ifhotcombustiblesweretransmittedinto'thesecubiclesfromtheairshaft(eitherUnit1orUnit2),itwouldbeunlikelythatafirecoulddevelopbecauseoftheamountofthecombust.ibleloadingsandthegeneralareadetectionandsuppressionsystemsineachzone.Asaresultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents(i.e.,equipmentand/orcables)onlyinFireArea12andFireZones64Aand64BforUnit1orinFireArea22andFireZones65Aand65BforUnit2.ForboththeUnit,1andUnit2=systemsanalyses,itwas'concludedthatatleastonepathofsafeshutdowncomponentsexistsfor.,eachsafeshutdown.system.Page9-41 ThisevaluationfortheabovefireareasandfirezonesdoesnotaffecttheexistingexemptionrequestsconcerningtheAuxiliaryBuildingHVACDuctPenetrations(Section7.13)orthe;.ContainmentSeismicGaps(Section7.14).Elevation573ftFireAreaContaininFireZones1,lAthrouh1H,136,137,138A,""138B,138CandFireArea12or22ForafireineithertheUnit1orUnit2airshaft,itisassumedforthepurposesofthisanalysisthatthefirewill.engulfFireArea12andFireZones1AandlBinUnit1orFireArea22andFireZones1Eand1FinUnit2.Thisassumptionis-basedonthefollowing:1Aspreviouslydi'scussed,eachajrshafthasalowcombustibleloading(20,)00Btu/ftfor'heUnitlairshaftand13,000Btu/ftfortheUnit2airshaft)which'willtend'odisperseanyproductsofcombustionthroughoutthelargevolumeoftheairshaft.(2)(3)(4)Thehotcombustiblesproducedwilltendtocoolrapidlywithinthelargeairshaftvolume.TheContainmentSprayPumpcubicles'(i.e.,FireZones1Aand1BinUnit1andlEand1F"anUnit2)arelargevolumes,wit(combustibleloadingvaluesofunder20,000Btu/ftforeachcubicle.Ifhotcombustiblesweretransmittedintothesecubiclesfromtheairshaft(eitherUnit1orUnit2),itwouldbeunlikelythatafirecoulddeveloporbetransmittedtoFireZone1duetotheamountofthecombustibleloadingsanditsprimarylocations(withinthepumps).Inaddition,FireZone1containsgeneralareadetectionsystems.ApreviousexemptionrequestwassubmittedtoandapprovedbyNRCrequestinganexemptionfrominstallationofanautomaticsuppressionsystemintheRHR/CTSpumparea.TheexemptionprovidesadetailedfirehazardsanalysisdemonstratingthatthefireareaPage9-42 andPumpRoomcubiclesareconstructedtopreventa-firefromleavingonePumpRoomandentering.anotherorfromenteringtwoPumpRoomsfromthecommonarea..Asa'resultoftheabove,thesystemsanalysisassumesalossofsafeshutdowncomponents(i.e.,equipmentand/orcables)onlyinFireArea12andFireZones1,lAand1Bfo'rUnit1orinFireArea22andFireZones1,1Eand1FforUnit2.ForboththeUnit1andUnit2systemsanalyses,itwasconcludedthatatleastonepathofsafeshutdowncomponentsexistsforeachsafeshutdownsystem.ThisevaluationfortheabovefireareasandfirezonesdoesnotaffecttheexistingexemptionrequestsconcerningtheAuxiliaryBuildingHVACDuctPenetrations(Section7.13)ortheContainmentSeismicGaps(Section7.14).ConclusionBasedonthepreviousanalysis,reasonableassurancecanbe.providedthatafireinanyoftheadjoiningfireareastotheAuxiliaryBuildingairshaftswi'thundamperedorunratedductpenetrationsorafireineitherairshaftwillnotadverselyimpactonsafeshutdowncapabilitiesoftheplant.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesfortheaboveconclusionaresummarizedbelow:(1)=Theairexhaustductpenetrationsfromthechargingpumpcubicles(FireZones62A,62B,62Cand63A,,63B,63C)intotherespectiveunit'sairshaftwillbeupgradedtomaintainthefireratingofthefireareaboundary.Page9-43 (2)(3)(4)(5)Smokeandhotcombustiblesenteringeitherairshaftwouldnormallytendtobeexhaustedthrough,theEngineeredSafeguardsSystemstodotheplantvents.Smokeandhotcombustiblesenteringeitherairshaftwouldtendtostreamupwardstotheceilingoftheairshaft,whentheunitsarenotrunning,spreadingoutintoFireZones49(fromFireZone12)or50(fromFireZone22)throughtheundamperedopeningsatceilinglevel.ThehotsmokewouldhavetoresultintheignitionofcombustiblematerialineitherFireZone49or50inordertospreadtoadjacentfirezones.Duetoautomaticdetectionandsuppressioncapabilitiesinadjacentzonescontainingsafeshutdownequipmentorcables,thisisnotconsideredacredibleevent.Intheshafts,productsofcombustionwouldtendtoaccumulateandmovedownwardsandspreadingoutintoFireZones44A,44B,44Cand44D(forUnit1),44E,44F,44Gand44H(forUnit2)through-theundampered-openingsatceilinglevel.ProductsofcombustionwouldthenbegintofilluptheheatexchangercubiclespriortoenteringFireZone44Nthroughthesteelgratedoorwaysatthe609ftelevation.'hisrepresentsacircuitouspathforsmokeandhotcombustiblestotakeinordertoimpactsafeshutdowncomponents.Productsofcombustioncouldaccumulatemoreandmovedownwardsintheshaft,fillingFireZone12(Unit1)orFireZone22(Unit2)beforeenteringotherfireareas.Thisalsorepresentsacircuitouspath.Therouteafirewouldhavetotakefromafireareaadjacenttoeitherairshaft,through'theairshaftandintoasecondfirearearepresentsacircuitouspath.Thefireareasadjacenttotheverticalairshaftsandtheairshaftsthemselvesallhavecombustibleloadingsofunder35,000Btu/ftforanequivalentfireseverityofunder25minutes.(6)(7)Detectionand/orsuppressionsystemsexistintheadjacentfireareaswhicharecapableofdetectingand/orextinguishingafireandminimizingthedamagetosafeshutdownequipmentandcables.Afireengulfinganyofthefireareasdirectlycommunicatingwiththetwoverticalairshaftshasbeenconsideredintheabovefireprotectionandsystemsanalyses.Afirein.anyofthesefireareaswillnotjeopardizethesafeshutdowncapabilityoftheplant.Page9-44 9.5FireZones70and73HatchEvaluation~PuruseThepurposeofthisevaluationistoanalyzetheimpactofunratedfloorhatcheslocatedbetweentheHVACEquipmentRooms(FireZones70and73)andtheUnits'and2Main,ControlRooms(FireZones53and54)oneitherredundantsafeshutdowncapability,thefixed.suppressionexemptionrequestsfortheMainControlRoomscontainedinSections7.11and7.12ofthisreportor,.engineering.evaluation9.2.and9.39.Athree-hourfire-rated.hatchassemblyisnotcommerciallyavailableforuseinthislocation.DescritionFireZones70and73aretheAuxiliaryBuilding.Thesealocatedonthe650ftelevationof.;firezonesarepartofa.larger-"firearea(whichalsoincludesFireZones71and72-Unit1andi'ComputerRooms)directly,abovetheUnit1andUnit2Control-Rooms.TheunratedfloorhatchesprovideaccessfromtheUnits'and2ControlRoomstotheHVACEquipmentRooms.EachhatchisprotectedwithalayerofpyrocreteonthesideofthehatchexposedtotheControlRooms.Allotherpenetrationsofthe""barriertotheControlRoomsareprotectedwithfire-ratedmaterial.TheHVACductspassingthroughthefloorareprovided<withfire-rateddampers.Page9-45 SafeShutdownEuimentThefireareadefinedby-FireZones70,71,72and73containsnosafeshutdownequipment,componentsorcables.FireProtectionEuimentAutomaticareadetectionisprovidedinFireZones70and7<3,,withautomat'icthermistordetection'ndmanualdelugewaterspraysystemsforthecharcoalfilterunits.FireZones71and72havefullareadetection.andautomaticHalonsuppressionsystems.FireAreas53and54arenotprovidedwithautomaticorfixedsuppression-~system,butionizationtype'moke'detectors"are'""installedaboveandbelowthesuspendedceilingandmanualfirefightingequipmentisavailable.FireHazardsAnalsisFireZones70,-.71,72,and73haveacombustibleloadingofunder47,000Btu/ftforanequivalentfireseverityofapproximately35minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeareunder33,820Btu/ftand25minutesrespectively).Theareacontains2automaticareadetectioninallfourfirezonesandautomaticHalonsuppressionsystemsinFireZones71and72.ManualdelugewaterspraysystemsareprovidedforcharcoalfilterunitsinFireZones70and73.Theprobabilityoffireinvolvingbothhatchessimultaneouslyislow.Asaconsequence,theprobabilityoffirespreadingdownintooneorbothunits'ontrolRoomsisalsolow.ShouldfirespreaddownintooneControlRoom,alternatesafeshutdowncapabilityexists.Page9-46 AnotherconcernistheprobabilityofafireoccurringinoneControlRoomandspreadingupthroughtheunratedhatchesintoFireZones70or73andtraversedownthroughthehatchontheothersidetotheControlRoomoftheoppositeunit.ThecombustibleloadingforFireArea53isunder47,000Btu/ftforanequivalentfireseverityunder35minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare28,225Btu/ftand21.2minutes,respectively).ThecombustibleloadingforFireArea54isunder47,000Btu/ft2Iforequivalentfi.resever.ity-.under.35minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare30,069Btu/ftand22.6minutes).Thereisnoother-communicationpathbetweentheControlRoomsandHVACRooms.TheHVACductspassingthroughthefloorhaveratedfiredampers.Thehatchesareprotectedwith.alayerofpyrocrete.Further-Itisunlikelythat'firecouldpropagatethroughsuchainvolvebothunits'ontrolRoomstortuouspathundetectedandmore,theControlRoomsareconstantlymannedandhaveareadetectionaboveandbelowsuspendedceiling.TheHVACRoo'msabovehav'eautomaticareadetectionandmanualsuppressionsystemsforthecharcoalfilterunits.simultaneously.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireinFireZones70,71,72and73wouldnotPage9-47 impairthesafeshutdowncapabilitiesineitherunit.Inaddition,thisevaluationdoesnotimpactonthebasesofthe'fixedsuppressionexemptionrequestsfortheMainControlRoomortheEngineeringEvaluation9.2and9.39.Thebasesthatjustifytheconclusionaresummarizedas"follows:(2)FireZones70,71,72and73containnosafeshutdowncomponentsorcables.FireZones70,71,72and73areprovidedwithdetectionsystems.FireZones71and72haveautomaticHalonsuppressionsystems.FireZones70and73havemanualdelugewaterspray'ystems'orthecharcoalfilterunits.(3)(4)-Thecombustibleloadin~inFireZones70,71,72and73isunder47,000Btu/ftThe.hatches,although'otfire-rated,wouldlimitthepotentialinvolvementoffireareasatthe633ftelevation,withorwithoutthecoatingofpyrocreteappliedtoeach.(6)(7)TheControlRoomsareconstantlymanned;theprobabilityoffire'n.oneControlRoomresultingindamageintheotherControlRoomislow.Ahypothesizedfireineitherunit"'sControlRoomwillbedetectedimmediately,anditcouldbeextinguishedbymanualfirefightingequipment.AcompletealternatesafeshutdowncapabilityfortheControlRoomsexists.Therefore,fireinvolvingeitherunit'sControlRoomwouldnotimpairthesafeshutdowncapability.9.6601ftPieTunnelEvaluation(FireZone6A)~PuroseThepurposeofthisevaluationistoanalyzetheimpactofthe601ftelevationpipe.tunnelonredundantsafeshutdownPage9-48 capabilitiescontainedonthe587ftand609ftelevations.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.The601ftpipetunnel(designatedasFireZone6A)providesapathofcommunicationbetweenFireZones5,6N,6M,6S,62A,62B,62C,63A,63B,63C,64A,64B,65Aand65Bonthe587ft"-elevationoftheAuxiliaryBuildingandFireZones43,44Athrough44H,44Nand44Sonthe609ftelevationoftheAuxiliaryBuilding.FireZone~=37islocated<on.the617ftelevationoftheAuxiliaryBuilding.The587,ftand609ft*elevationsaredefinedasseparatefireareasintheMarch1983AppendixRsubmittalfor'.C..Cook.Aportionofthepipetunnelis"located'onthe609ft"elevation-directlybeneathFireZone37.~Theportionofthepipe'-tunnelonthe609ftelevationisthemainentranceaccesspointintothetunnelitself.Figure9.6-1isaplanviewofthe587ftelevation,withtheshadedareaindicatingwherethe601ftpipetunnelprotrudesdownintothe587ftelevation.Figure9.6-2isaplanviewofthe609ftelevation(withtheexceptionofFireZone37,which"isactuallyatthe617ftelevation),withtheshadedareaindicatingwherethe601ftpipetunnelislocatedbelow.NotethattheportionofthepipetunnelbelowFireZone37isatthe609ftelevation,withtheremainderlocatedatthe601ftelevation.Figure9.6-3isablow-upofthe609ftelevation,Page9-49 withtheentranceaccessvestibuleindicatedasitexistsonthe609ftelevationandtheremainderoftheshadedarealocatedonthe601ftelevation.Figure9.6-4isanelevationviewoftheAuxiliaryBuildinglookingsouthwiththeshadedareaindicatingthelocationofthepipetunnel.,.Access,is.gained,tothe;pipe-tunnelviaanormallylocked,keycardcontrolled-steelelevation(seeFigure9.6-3).gateaccessdooratthe609ftAnentranceaccessvestibulein1theshapeofanoblong"T"islocatedjustinsidethesteelgateaccessdoor.Inthesouth"'allof-thest'em'of'the"T"'isan""unratedhollowmetal--.doorwhich"providesaccesstoaC-shapedwalkway,withthe'ongportionofthe"C"runningnorth-south.BoththeentranceaccessvestibuleandtheC-shapedwalkwayarelocated,onthe,609.ft"elevationdirectlyb'elowFireZone37.Ladderopenings.'are-provided."inthenorthwestandsouthwestcornersoftheC-shapedwalkway'whichprovideaccesstothe601ftportionofthepipetunnel(seeFigures9.6-3and9.6-4).Onthe601ftelevation,thepipetunnelisarrangedintheformoftwoinvertedT's,withoneontheUnit1,ornorth,sideoftheAuxiliaryBuilding,andtheotherontheUnit2,orsouth,IsideoftheAuxiliaryBuilding(refertoFigure9.6-3).ThestemofeachTrunseast-westfromtheladderopeningtothewestwalloftheAuxiliaryBuilding,withthetopsofbothT'sjoinedalongtheAuxiliary/TurbineBuildingwall.ThestemofeachTrunsoveraportionoftheopenareaofFireZone5,thechargingpumpPage9-50 cubicles(FireZones62A,62Band62CforUnit1andFireZones63Aand63BforUnit2),thesafetyinjectionpumpcubicles(FireZones64Aand64BforUnit1and65Aand65BforUnit2),FireZone6NforUnit1andFireZone6SforUnit2.ThetopsofbothT'straverseFireZone6N,FireZone6M,andFireZone6S.The601ftpipetunnelalsoabutsFireArea12,(thequadrant2pipingtunnelofUnit1),.FireArea22(thequadrant2pipingtunnelofUnit2),FireZones.80and84oftheTurbineBuilding,andthecorridortotheAuxiliaryFeedPumpRooms(FireArea17C)locatedintheTurbineBuilding.(referto,Figures9.6-1and9.6-3).Onthe609ftelevation,thepipetunnelrunsunderneaththe617ftelevationValveGallery(FireZone37.),theRHRandcontainmentspraypumpheatexchangers(Fire.Zones44A-H)andthemain,openfloorareaofFireZones,44Nand44S.Ahatchopening,providesaccessintothestemofeach'Tofthepipetunnelonthe609ftIelevation,withonehatchlocatedinFireZone44NandtheotherinFireZone44S(refertoFigure9;6-3).SafeShutdownEuimentThe601ftpipetunnelcontainsnosafeshutdownequipment,cables,orcomponents.'ireProtectionEuimentAutomaticdetection-andsuppressioncapabilitiesarenotprovidedinthe601ftpipetunnel.WiththeexceptionofFireAreas12and22,FireZones37,44Athrough44H,andFireZones80and84oftheTurbineBuilding,automaticdetectionandPage9-51 suppressioncapabilitiesareprovidedinallareasandzonesabuttingthe601ftpipetunnel.FireZone5isprotectedby,areadetectionandautomaticdrypilotpreactionsprinklerinnormallyaccessibleareaswiththeexceptionofsmallportionsbetweenFireZones4and62Awhichisprovidedwithdetection'only.AutomaticsuppressionisprovidedinFireZones80and84.FireZone37hasareadetectionintheT-shapedvestibuleandcontainsnosuppressionsystemsandFireAreas12and22containfnoautomaticdetectionorsuppressioncapabilities.The"T"shapedentranceaccess~vestibuleatelevation"'609ftofFireZone,~44Ndoesnotcontaindetectionorsuppressioncapabilities.The~'remaining.portions.ofFireZone44Ncontaindetectionand7~suppressionsystems.-~'FireHazardsAnalsisTherearenegligibleexposedcombustibleswithineitherthe@609ftor601ftelevationsofthepipetunnel.Thereisalimitedamountofcableswithinthepipetunnel,buttheyareallinstalledwithinrigidsteelconduit.Nopumpsor.motorsarelocatedwithinthepipetunnel;therefore,lubricatingoilisnotcontainedinthetunnelandisnotrequiredduringmaintenanceoperations.Thepipetunnelisanormallylocked,highradiationarea,anditdoesnot'rovideaccesstoanyotherplantlocations;therefore,thepotentialforstorageand/ortransportoftransientcombustiblesinorthroughthepipetunnelislow.Basedontheseconsiderations,thefixedandtransientPage9-52 combustibleloadinginthe601ftpipetunnelisunder13,000Btus/ftforequivalent"fireseverityunder10minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthis,timeare143Btu/ftandO.lminutesrespectively).Therearethreeaccesspointsintothepipetunnel,withallthreeexistingonthe609ftelevation(refertoFigure9.6-5).Oneisasteelgate,normallylockedswingdoorwhichopensintotheentranceaccessvestibuleonthe609ftelevationdirectlybelowFireZone37.Thisisthemainentranceaccesspointtothepipetunnel.From-">the:entranceaccessvestibule,anunratedhollowmetalswingdoorprovidesaccesstotheC-shapedwalkway,andhence,.thetwoladderopeningsdowntothe601ftelevationofthepipetunnel.Theother.twoaccesspointsarehatchopeningsinthefloorofthe609ftelevationwhichopentothestemofeach"T"duewest'ofeachunit'ssealwaterheatexchangercubicle.Thehatchopeningsareprotectedbysteelplatehatchcoversthataresealedwithhighdensitylead(-150pcf)which,althoughnotfire-rated,actasradiationandsmokebarriers.Therearenumerouspenetrationsinthewalls,floor.,andceilingofthepipetunneltoadjacent.areasandzones.Theapproximatelocationand,numberofpenetrationsareasindicatedinFigures9.6-5through9.6-15.Thelayoutofthe609ftIportionofthepipetunnelisindicatedonFigure9.6-5,withthegenerallocationofpenetrationsandthemethodofsealingthemPage9-53 indicatedwhereappropriate.TheshadedpenetrationsonFigures9.6-6,9.6-8and9.6-10havebeensealedwitheithersilicone'foam,highdensitylead,acombinationofthetwo,orbysteelplatehatcheswithhighdensityleadand/orven'tilationductwork."AllpenetrationstoFireAreas'2and22havebeensealedinthis-manner,alongwithallpenetrationsintheceilingofthe601ft"portionofthepipetunneltoFireZones44Nand44Sabove(seeFigures9.6-6,9.6-8and9.6-10).TheremainderofthepenetrationsindicatedonFigures9.6-5through9.6-14areopenandprovideap'otentialpathfor"<communicationbetweenareas.and/orzonesabuttingthepipe'-tunnel.Withtheexceptionoftheopeningstothechargingpump'cubicles(Fire*Zones62A,.62B,62Cand63A,63Band63C)which".'will.hesealedwiththree-hourfire-ratedmaterial,theremaining'penetrationswillnotbesealed.Thejusti'ficationfornot'sealingtheremainingpenetrationscanbebrokendownintothreeinterrelateddiscussions.Theyare:oCombustibleLoadingoExistingDetectionandSuppressionoCommunicationPathstoImpactonSafeShutdownEachisdiscussedwithrespecttothepotentialimpactonsafeshutdowncapabilitiesinthepipetunnelandtheabuttingfireareasand/orzonesonthe609ftand587ftelevationsoftheAuxiliaryBuilding.Page9-54 587ftElevationOnthe587ftelevationoftheAuxiliaryBuilding,FireZones5,6N,6M,6S,64A,64B,65A,65B,62A,62B,62C,63A,63Band63Cabutthepipetunnel.Thepenetrationstothecharging,pumpcubicles,FireZones62A,62B,62CandFireZones63A,63B,63C,willbeupgradedtoachieveathree-hourfireratingtherebyassuringtheintegrityofthebarriertothepipetunnel.,Theremainingfirezonesformasinglefireareawhichhasacombustibleloadingandequivalentfireseverityofapproximately27,000Btus/ftand,20.minutes,respectively.(Theactual2combustibleloadingandequivalentfireseverityexistingatthistimeare12,420Btu/ftand9.3minutesrespectively).'igures9.6-7through9.6-15indicate.the'locationsof"unprotected"~~penetrationsinthepipetunnelboundariesto"thezonesonthe'.587ftelevationwhichabutit.Thefirezonesonthe587ftelevationthatabutthepipe-tunnelareprotectedbyareadetectionandautomaticdrypilotpreactionsprinklers.FireZone5isprotectedbyareadetectionandautomaticdrypilotpreactionsprinklersinnormallyaccessibleareaswiththeexceptionofsmallportionsbetween62AandFireZone4whichisprovidedwithdetectiononly.Thiscombinationofautomaticionizationdetectionforearlywarning'ndautomaticpreactionsprinklersforextinguishmentofanypotentialfireswilllimitthefiredamage.Page9-55 Priortofireextinguishment,heatandsmokecanenterthepipetunnelthroughtheunsealedpenetrationsindicatedonFigures9.6-7through9.6-15.Anyheatandsmokeenteringthepipetunnelwouldbecooledbytheactuationofthepreactionsprinklers.Duetothelackofcombustibleswithinthepipetunnelitself,afirecouldnotpropagateintothetunnelorinitiateanewfirewithin.thetunnelduetothemigrationofcooledsmokeandheatintothetunnel.AsallpenetrationstoFireZones44Nand44Sonthe609ftelevationabovethepipetunnelaresealed,anyŽheatandsmoke'wouldhaveto'fill.thetop'andstemofthe"T's"ofthetunnelandmigrateuptheladderopeningstothe609-ftportionof'thetunneltoimpactonFireZones44A-H,'4S,.and44Nonthe:609ftelevationoftheAuxiliary,Building..'Due-to.theprotectionprovidedbythenormallyclosedunratedhollowmetaldoorfromtheC-shapedwa'lkwaytotheentranceaccessvestibuleonthe609ftelevation,heatandsmokewouldhavetofillthevolumeoftheC-shapedwalkwaypriortomigratingoutthroughtheopenpenetrationsnearfloorlevelinitswestwalltotheentranceaccessvestibule.Fromtheentranceaccessvestibule,smokeandheatwouldthenhavetomigrateoutintoFireZone44N.Toimpactonsafeshutdowncapabilityonthe609ftelevation,smokeandheatwouldthenhavetomigratethroughFireZone44NintoFireZone44Sandinitiateafireinbothzones.Threeconsiderationsprecludethisfromhappening.FirstisthePage9-56 openstairwayuptothe650ftelevation,whichisapproximately20ftwestoftheentranceaccessopeningtothevestibule.(Thevestibuledoesnotcontainsafeshutdownequipment.)Smokeandheatwouldtendto'igrateupthisstairpriortotravelingfurtherwesttoimpact'onFireZone44S.Secondistheexistingdetectionandpreactionsprinkler.,systemsonthe609ftelevation.Shouldfireoccurasaresultofsmokeandheattravelingouttheaccessopening,'heearlywarningdetection,systemwouldinitiatemanualfirefightingactivitieswhilethesuppressionsystems,would,rebegin..:,tocontrolandextinguishthefirepriortoimpactingon-FireZones44Nand44Ssimultaneously.Third,andmostimportant,isthecircuitouspaththatsmokeandheatwouldhavetotaketotravelfrom,the587ftelevationthroughthepipetunneltoenterthe609'ft.elevation.In.order.toimpactonthe609ftelevation,smokeandheatoriginatingonthe587ftelevationwouldhavetostratifyattheceilinglevelofthe587ftelevationpriortoenteringthepipetunnel.Smokeandheatwouldthenhavetomigratethroughthepipetunnelandpenetrateoutintothe609ftelevation.Assmokeandheatmigratesthroughthepipetunnel,"itwouldtendtocoolanddisperse,duetothelackofcombustiblematerialstoprovideadditionalfuelforthefire.Asaresult,reasonable.assuranceisprovidedthatsmokeandheatoriginatingfromafireonthe587ft-elevationwillnotbeabletomigratethroughthepipertunnelandadverselyimpactonsafeshutdowncapabilityonthe609ftelevation.Page9-57 WithrespecttoFireAreas12and22,whichalsoabutthepipetunnelatthiselevation,thesamecircuitouspathanddetectionandsuppressioncapabilitiesonthe587ftand609ftelevationsexist.Inaddition,thecombustibleloadinginFire'Areas12and22isunder20,000and13,000Btu/ftwithanequi-valentfireseverityofunder15andl0minutes,respectively,andallpenetrationstothepipetunnelareasealed.TheseconsiderationsprecludethepossibilityofafireineitherFireArea12or22fromimpactingonsafeshutdowncapabilityonthe587ftor609ftelevation.Thepipetunnelhasminimalfixedortransientcombustibles:that"couldeitherbetheinitialmaterialignitedorasecondarysourceforignitionasaresultoffireenteringthepipetunnel.'Therefore,thepipetunnelwill,itself,havenoimpactonsafe'shutdowncapabilitywiththeexceptionofitfunctioningasapotentialpathforf,irecommunicationonandbetweenelevationsoftheAuxiliaryBuilding.Duetothelocationofpenetrationsinthewallsofthepipe,tunneltoFireZones6N,6M,and6Sonthe587ftelevation,thepotentialexistsforfire,smoke,and/orheattotraversethroughthepipetunneltobothUnit1andUnit2sidesoftheAuxiliaryBuilding.Thisisnotaworst-casescenarioduetothelackofcombustiblesinthepipetunnelandtheexistenceofbarriers(eventhoughallpenetrationsarenotsealed)betweenthepipetunnelandthe587ftelevation.Theworst-casescenarioisaPage9-58 fireoriginatingintheopenareaofFireZone6Mandmovingin1bothdirectionstoFireZones6Nand6S.ThisscenariohasalreadybeenconsideredintheMarch1983AppendixRsubmittal,whichhasbeenreviewedandapprovedbytheNRC.Therefore,firetransmissionbetweenFireZones6N,6M,and6Sthroughthepipetunneldoesnotrequirefurtherconsideration.609ftand617ftElevationsOnthe609ftelevationoftheAuxiliaryBuilding,FireZones44N,44S,and44Athrough44Habutthepipetunnel.FireZone37onthe617ftelevationislocatedabovethepipetunnel.ThesefirezonesandFireZone43,whichdoesnotabutthepipetunnel,makeupasinglefireareawhichhasafixedcombustibleloadingofapproximately47,000Btu/ftfor-anequivalentfireseverityofapproximately35minutes.,(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare34,482Btu/ftand25.8minutes,respectively.)Allpenetrationsfromthefloorofthezonesonthe609ftand617ftelevationtothepipetunnelareprotectedbysiliconefoam,highdensitylead,acombinationofboth,orsteelplatehatchcoverswithhighdensitylead.Theonlyotherpenetrationstothepipetunnelconsistofasteelgateaccessdoortotheentranceaccessvestibule,anunratedhollowmetalswingdoorfromthevestibuletotheC-shapedwalkway,andtheunsealedpenetrationsnearthefloorinthewestwalloftheentranceaccessvestibule.ItismorelikelyforafireinFireZone44NPage9-59

'toattackthedooropeningsfirst,priortoimpactingonthe.sealedfloo'rpenetrationsortheunsealedpenetrationsinthe'~westwalllocatednearthefloor.Aswiththe587ftelevation,"theexistingearlywarningionizationdetectionsystemoutside'theaccessvestibuleinFireZone44Nwouldinitiatefire:fightingactivities.The,automaticpreactionsprinklersystems(alsooutsidetheaccessvestibuleinFireZone44N)wouldacttocontroland/orextinguishafire,therebyreducingthefiredamage.Basedontheexist-inglevelofdetectionandsuppression,4theamountofthecombustibleloadingandequivalentfireseverityintheabuttingareasand/orzones(exceptFireZone43)approximately,40,000Btu/ftand30minutes,respectively.(the2actualcombustible.loadingandfireseverity,existingatthis;timeare25,853Btu/ftand19minutes,respectively)andthe.,~locationandprotectionprovidedforthepenetrationstothepipetunnel,thereisreasonableassurancethatfireinabuttingzonesonthe609ftand617ftelevationswillnotadverselyimpactonthepipetunnelitself.Inaddition,heatandsmokefromafireonthiselevationwouldtendtoriseuptotheceilingofthe609ftand617ftelevat.ionspriortostratifyingdowntothelevelofthedoorandpenetrationopeningsintothepipetunnel.ConclusionBasedonthepreviousevaluation,reasonableassurancecanbeprovidedthatafireonthe587ftelevationoronthe609ftPage9-60 elevationinthepipetunnelwillnotadverselyimpactonsafe~~~shutdowncapabilities.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebases.whichjustifythisconclusionaresummarizedasfollows:Therearelowexposedfixedortransientcombustibles.locatedwithinthepipetunnel;therefore,firecannoteitherinitiatei:nthetunnelorresultinthetunnelasaresultofafireinadjacentareasand/orzones.(2)Thecombustibleelevationsareequivalentfirerespectively.--.loadingsonth~587ftand609ft27,000Btu/ftand47,000withseveritiesof20and35minutes,(3)(4)Automaticdetection'andpreactionsprinklersystemsare'rovidedinmostportionsofthezonesabuttingthepipetunnelwithunsealed'penetrations;'ireZone37'asareadetectiononly;andFireAreas12,22andFireZone44Npipetunnelvestibule:whichabutthe"pipe:tunnelanddonotcontaindetectionorsuppressioncapabilities,havelowfireloads.Allpenetrationstothechargingpumpcubicles'forUnit.1(FireZones62A-C)andUnit2.(FireZones63A-C)fromthepipetunnelwillbesealedwiththree-hour-rated'aterial.(5)TheMarch1983AppendixRsubmittal,whichhasbeenreviewedandapprovedbytheNRC,proposedmodificationstopreventfireinonezoneofthe587ftelevationfromadverselyimpactingonalternateshutdowncapabilitiesinotherzonesofthe587ftelevation;therefore,theimpactoffireoccurringin"onezoneofthe587ftelevationandspreadingtootherzonesofthesameelevationneednotbefurther'ddressed.(6)Dueto(1)thecircuitouspathwhichfiremusttakefromthe587ftelevationthroughthepipetunnelandontothe609ftelevationtoimpactonredundantsafeshutdowncapabilitiesonthe609ftelevation,(2)thecoolingactionofthesuppressionsystemsonboth.elevations,and(3)lackofcombustiblewithinthepipePage9-61 tunnel,reasonableassuranceisprovidedthatsafeshutdowncapabilityonthe609ftelevationwillnotbeadverselyimpactedbyafireonthe587ftelevation.(7)Separatingthepipetunnelfromeitherthe587ftor609ftelevationswillnotenhancetheprotectionprovidedbytheexistingconfigurationandproposedmodifications.9..7.FireArea13andFireArea14BoundarEvaluation~PutoseThepurposeofthisfireareaboundaryevaluationistodeterminetheimpactonredundantsafeshutdowncapabilityofanunratedfieldfabricated.fusiblelink.guillotine"type,damper-presentlylocatedbetweenFireAreas13"(Unit1DieselOilPumpRoom)and-14(Unit1TransformerRoom).Inaddition,thisevaluationdoesnot-.adverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.'ireAreas13and14arelocatedonthe587and591ftelevationsoftheAuxiliary.Building.AccessisprovideddirectlyintoFireArea14fromtheTurbineBuilding(FireZone79),whileaccesstoFireArea13isviathe1CDDieselGeneratorRoom,FireArea15.Anunrated,fieldfabricatedfiredamperconstructedof3/8-in.platesteelisprovidedinanHVACopeninginthecommonwallseparatingFireAreas13and14.SafeShutdownEuimentThesafeshutdowncomponentscontainedinFireArea13arethedieselgeneratorfueloiltransferpumps1CDl,lCD2,2CDl,2CD2andtheirassociatedpowercables.Page9-62 FireArea14containscablesassociatedwithbothdieselge'neratortestbreakers(ACB1DGTAB;and1DGTCD).Inaddition,thepressurizerheater4kVl4'80VtransformersandtheirassociatedprimaryandsecondarypowercablesarelocatedinFireArea14.Thesetransformersprovide480Vpowertothepressurizerheaters.Thepressurizerheatersandtheirassociatedtransformersarenotrequiredforsafeshutdownoftheunit,however,.theheaterswereincludedintheoriginalanaly'sisfortheMarch1983submittalforplantoperationalflexibility.*FireProtectionEuiment,Presently,FireArea14doesnotcontainafiredetection(i.e.,ionizationorinfrared)system.Section8'ofthisreport;however,doesindicatethatafire'.detection-'systemwillbeinstalledinFireArea14providingremotealarmsintheControl<Room.Automaticfiredetection'andcarbon~dioxidesupp'ression.systemsareprovidedforFireArea-13whichhasafireseveritpofunder30minutes(the.actualfireseverityexistingatthistimeisunder19minutes).WhileFireArea14doesnothaveanautomaticsuppressionsystem,itdoescontainmanualfirefightingequipmentandhasafireseverityoflessthan10~minutes(theactualfireseverityexistingat.thistimeisless~than1minute).FireHazardsAnalsisFireArea13containsSafeShutdownComponents1CD1,lCD2,--2CD1and2CD2fueloiltransferpumpsandtheirassociatedpowerPage9-63 cables.Lossofthesecomponentsandcableswouldresultinasubsequentlossofcapability"oftransferringfueloilfromtheUnit1"CD"fueloiltanktotheUnit1andUnit2"CD"dieselgenerators.However,therearenoeffectsonthecapabilityoftheUnit1andUnit2"AB"dieselgenerators.Thisresultsinonetrainofsafeshutdowncomponentsbeingfreeoffiredamage.FireArea14containsthepressurizerheater4kV/480Vtransformers,TRllPHAandTRllPHC,andtheirassociatedprimaryandsecondarypowercables.Thelossofthesecomponentsandcablesresultsin~thelossofallpressurizer-heater':groups.(i;.e.,backupandcontrolgroups).ThepressurizerheatersarenotrequiredforsafeshutdownandasdiscussedinSection6oftheMarch.1983submittal,modificationhavebeenrecommendedtorepowerthepressurizer.heatersfromtheunaffectedunit.VarioussafeshutdowncablesassociatedwiththeUnit1dieselgenerator"CD"arealso'outedinFireArea14.Thesecableswouldbelostintheeventofafireanddieselgenerator"CD"would,notbeavailable.Inaddition,FireArea-14containscablesassociatedwithbothdieselgeneratortestbreakers(ACB1DGTABand1DGTCD).The4160Vpowercablesrunningfromtheupstream4kVcircuitbreakerstoACB1DGTABandACBlDGTCDcouldfailintheshortedcondition.ThiswouldresultinthedieselgeneratorsbeinginoperativeandwouldrequirecompletealternativeshutdownfromUnit2intheeventofafire.Page9-64 Onthebasisoftheabove,consolidatingFireAreas13and14wouldresultinthelossof3outof4dieselgenerators.TheonlyoperabledieselgeneratorwouldbetheUnit2"AB"diesel.tSincebothan"AB"anda"CD"trainassociatedpumpisrequiredforthecomponentcoolingwaterandessentialservicewatersystems,onedieselgenerator's.notsufficient.tosafelyshutdownbothunits.ThisprecludesanyconsolidationofFireAreas13and14.IfFireAreas13and14cannotbeconsolidated,thentheonly,"alternative'.is~to.:qualify-.-the.afieldfabricateddamperbetweenthetwofireareas.FactoryMutualhaspublishedastandard,"LossPreventionData"Section1-45,which-appliestoairduct,.systems.Theobjectivesofthestandardare:(1)Torestrictthespreadof.fire,.smoke,"andheatthrough=-air-cond,itioningsystemsfromone--fireareatoanotherorintoabuildingfromoutside.(2)Tomaintainthefireresistive..integrityofbuilding'lements,suchasfloors,walls,andcolumnsaffectedbytheductsysteminstallation,byminimizingignition'sources'andcombustibilityoftheelementsoftheductsystem.(3)Todiscusstheuseofairductsystemsfortheadditionalpurposeofemergencysmokecontrol.Thestandardprovidesdesignguidanceandrecommendations",forductsystemsincluding.locationandminimumdesign.requirementsforfiredampers.InreviewingtheFactoryMutualsystemspecificationsSection1-45"LossofPreventionData"page.3,Item2under"Recommendations"states:Page9-65 Whereverductspassthroughinteriorfirecutoffsofthree-hourormorefireresistanceratings,openings18in.(455mm)ormoreindiameteroronlongestsideshouldbeprotectedbyadoorarrangementhavinganoverallfireratingofthreehours.Atopeningsinsuchcutoffsnotexceeding18in.(455mm)indiameteroronlongestside,1/8-in.(3.2mm)steelplatesmaybeused.Thefieldconstructeddamperislessthan18inchesonitslongestsideandis3/8-in.thicksteelplate.ItmeetstheFactoryMutualrequirementsforprotectionofopeningsnottohaveathree(3)hourfir'erating.Basedonthisguidance,theexisting-3/8-in.thickfusible-linkactuatedsteelplateprovidesadequateprotectionfortheventilationopeningintheCbarriercommontoFireAreas13and14.Inadditiontotheexceeding18-in.onthelongestsidelocatedinbarriersrequiredfusiblelink,thedamperisprovidedwithaCO2popoffdevicevhichvillclosethedamperuponactuationoftheCO2systeminFireZone13.Therefore,theseasindividualfireareas.ConclusiontwofireareascanbeconsideredBasedonthepreviousevaluation,theexistingcarbondioxideactuateddamperlocatedbetweenFireAreasl3and14isanacceptabledeviceformaintainingtheratingofthefireareaboundary.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thesebasesthatjustifythisconclusionaresummarizedasfollows:Page9-66 (1)FireAreas13and14cannotbeconsolidatedintoasinglefireareaonthebasisthatthepotentiallossofthreeoutoffourdieselgeneratorswouldjeopardizethesafeshutdowncapabilitiesoftheplant.'2)TheexistingdampermeetstherequirementsoftheFactoryMutual'ystemspecificationsforfiredampers.'3}AfterthemodificationsrecommendedintheMarch1983submittalarecompleted,bothFireAreas13and14willcontainautomaticfiredetectionsystems.-e(4)FireArea13presentlyisprovidedwithanautomaticcarbondioxidesuppressionsystemwhichwouldquicklyextinguishafireinthisarea.FireArea14hasbeenprovidedwithmanualfirefightingequipmentandhasanequivalentfireseverityoflessthan10minutes(theactualfireseverityexistingatthistimeislessthan1minute).(5)SinceFireA~ea14has,acombustibleloadingofunder13000Btu/ft,'hisareaisnotaprimarysourceoffire.(6)Replacingtheexisting3/8-in.:"thicksteelplatedamperwithathree-hour-rateddamperwouldnotenhancethe,protectionprovidedby'theexisting"configuration.e9.8FireArea21andFireArea20BoundarEvaluation~Purose'Thepurposeofthisfireareaboundaryevaluationistodeterminetheimpactonredundant.safeshutdowncapabilityofanunratedfieldfabricatedfusiblelinkguillotinetypedamperpresentlylocatedbetweenFireAreas21(Unit2DieselOilPump-Room)and20(Unit2TransformerRoom}.Inaddition,this"evaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-67 DescritionFireAreas20and21arelocatedonthe587and591ftelevationsoftheAuxiliaryBuilding.AccessisprovideddirectlyintoFireArea20fromtheTurbineBuilding(FireZone85),whileaccesstoFireArea21isviathe2ABDieselGeneratorRoom,.FireArea-19.;-Anunrated,fieldfabricatedfiredamperconstructedof3/8-in.:platesteelisprovidedinanHVACopeninginthecommonwallseparatingFir'eAreas20and21.SafeShutdownEuimentThesafeshutdowncomponentscontainedi'n'FireArea21arethedieselgenerator,fuel"oiltransfer.pumpslABl,lAB2,2AB1,2AB2andtheirassociatedpowercables.FireArea20.containscablesassociatedwithbothdieselgeneratortestbreakers(ACB'DGTABand2DGTCD).Inaddition,thepressurizer=heater4kV/480VtransformersandtheirassociatedprimaryandsecondarypowercablesarelocatedinFireArea20.Thesetransformersprovide480Vpowertothepressurizerheaters.Thepressurizerheatersandtheirassociatedtransformersarenotrequiredforsafeshutdownoftheunit,however,theheaterswereincludedintheoriginalanalysisfortheMarch1983submittalfor,plantoperational'lexibility.FireProtectionEuimentPresently,FireArea20doesnotcontainafiredetection(i.e.,ionizationorinfrared)system.Section8ofthisreport,however,doesindicatethatafiredetectionsystemwillbePage9-68 installedinFireArea20providingremotealarmsintheControlRoom.AutomaticfiredetectionandcarbondioxidesuppressionsystemsareprovidedforFireArea21whichhasafireseverityofunder35minutes(theactualfireseverityexistingatthistimeisunder21minutes).WhileFireArea20doesnothaveanIIautomaticsuppressionsystem,itdoescontainmanualfirefightingequipmentandhasafireseverityoflessthan15minutes(theactualfireseverityatthis.timeisapproximately1minute).FireHazardsAnalsisFireArea21containsSafeShutdownComponentslAB1,1AB2,2ABland2AB2fueloiltransferpumpsandtheirassociatedpowercables..Lossofthesecomponentsandcables,wouldresultinasubsequentlossofcapabilityof,transferringfueloilfromtheUnit2"AB"fueloiltanktotheUnit1'ndUnit2"AB"'dieselgenerators.However,therearenoeffectsonthecapabilityoftheUnit1andUnit,2"CD"dieselgenerators.Thisresultsinonetrainofsafeshutdowncomponentsbeingfreeoffiredamage.FireArea20containsthepr'essurizerheater4kV/480Vtransformers,TR21PHAandTR21PHC,andtheirassociatedprimaryandsecondarypowercables.Thelossofthesecomponentsandcablesresultsinthelossofallpressurizerheatergroups(i.e.,backupandcontrolgroups).ThepressurizerheatersarenotrequiredforsafeshutdownandasdiscussedinSection6oftheMarch1983submittalmodificationshavebeenrecommendedtoPage9-69 repowerthepressurizerheatersfromtheunaffectedunit.Inaddition,FireArea20containscablesassociatedwithbothdieselgeneratortestbreakers(ACB2DGTABand2DGTCD).The4160Vpowercablesrunningfromtheupstream4kVcircuitbreakerstoACB2DGTABandACB2DGTCDcouldfailintheshortedcondition.ThiswouldresultinthedieselgeneratorsbeinginoperativeandwouldrequirecompletealternativeshutdownfromUnit1intheeventofafire.Onthebasisoftheabove,consolidatingFireAreas20and21wouldresultin'he'-lossof.3outof4dieselgenerators.The-onlyoperabledieselgeneratorwouldbetheUnit1"CD"diesel.Sincebothan"AB"and,,a"CD"trainassociatedpumpisrequired'forthecomponentcoolingwaterandessentialservicewatersufficient'tosafel-'systems,"onediesel'eneratorisnotY.'-shutdownbothunits.ThisprecludesanyconsolidationofFire.Areas20and21.IfFireAreas20and21cannotbeconsolidated,thentheonlyalternativeistoqualifythefieldfabricateddamperbetweenthetwofireareas.FactoryMutualhaspublishedastandard,"Loss'reventionData"Section1-45whichappliestoairductsystems.Theobjectivesofthestandardare:(1)"Torestrictthespreadoffire,smoke,andheatthroughair-conditioningsystemsfromonefireareatoanotherorintoabuildingfromoutside.(2)Tomaintainthefireresistiveintegrityofelements,suchasfloors,walls,andcolumnsbytheductsysteminstallation,byminimizingsourcesandcombustibilityoftheelementsofsystem.buildingaffectedignitiontheductPage9-70 (3)Todiscusstheuseofairductsystemsfortheadditionalpurposeofemergencysmokecontrol."Thestandardprovidesdesignguidanceandrecommendationsforductsystemsincludinglocationandminimumdesignrequirementsforfiredhmpers.InreviewingtheFactoryMutualSystemspecificationsSection1-45"LossPreventionData,"Page3,Item2,under"Recommendations"states:"Whereverductspassthroughinteriorfirecutoffsofthree-hourormorefireresistanceratings,openings18in.(455mm)ormoreindiameteror~onlongestsideshouldbeprotectedbyadoorarrangementhavinganoverallfireratingofthreehours.Atopeningsinsuchcutoffsnotexceeding18in.(455mm)indiameteroronlongestside,1/8in.(3.2mm)steelplatesmay'beused."Thefieldconstructeddamperislessthan18in.onitslongestsideandis3/8in.thicksteelplate.Itmeetsthe,FactoryMutualrequirementsforprotectionofopeningsnotexceeding18in.onthelongestsidelocatedinbarriersrequiredtohaveathree-hourfirerating.Basedonthisguidance,theexisting3/8-in.thick.fusible-linkactuatedsteel,plateprovidesadequateprotectionfortheventilationopeninginthebarriercommontoFireAreas20and21.Inadditiontothefusiblelink,thedamperisprovidedwithaC02popoffdevicewhichwillclosethedamperuponactuationoftheC02systeminFireZone21.Therefore,thesetwofireareascanbeconsideredasindividualfireareas.Page9-71 ConclusionBasedonthepreviousevaluation,theexistingcarbondioxideactuateddamperlocatedbetweenFireAreas20and21isanacceptabledeviceformaintainingtheratingofthefireareaboundary.Inaddition,thisevaluationdoesnotadverselyimpact,onotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)FireAreas20and21cannotbeconsolidatedintoasinglefireareaonthebasisthatthepotentiallossofthree"out'offourdieselgenerato'rswouldjeopardizethesafeshutdowncapabilitiesoftheplant.(2)TheexistingdampermeetstherequirementsoftheFactoryMutualSystemspecificationsforfiredampers.(3)AfterthemodificationsrecommendedintheMarch1983submittalarecompleted,bothFireAreas20and21willcontainautomaticfiredetectionsystems.(4)FireArea21presentlyis-providedwithanautomatic,carbondioxidesuppressionsystemwhichwouldquicklyextinguishafireinthisarea.FireArea20hasbeenprovidedwithmanualfirefightingequipmentandhasanequivalentfireseverityof15minutes(theactualfireseverityexistingatthistimeisapproximately1minute).(5)SinceFireArea20)asalowcombustibleloadingofunder20,000Btu/ft,lessthan15minutesfireseverity,thisareaisnotaprimarysourceoffire.(6)Replacingtheexisting3/8-in.thicksteelplatedamperwithathree-hour-rateddamperwouldnotenhancetheprotectionprovidedbytheexistingconfiguration.9.9FireAreaContaininFireZones3,32,36,48,and69andFireAreaContaininFireZones49,5051,and52BoundarEvaluation~FuroseThepurposeofthisevaluationistodetermineiftheabovefirearea's.canbeconsolidatedintoonefireareaandnotPage9-72 adverselyimpactonredundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.TheMarch1983submittal"SafeShutdownCapabilityAssessmentandProposedModifications"to10CFR50,AppendixR,SectionIII.G.identifiedFireZones3,32,36,48,and69asonefirearea,andFireZones49,50,51,and52asaseparatefirearea.Theabovedefined.fireareasarecommunicatingwitheachotherthroughunratedbarrierpenetrations,undamperedHVACductsandairintakeandexhaustplenums.Safe'ShutdownEuimentThefireareaconsistingofFireZones3,32,36,48,and69doesnotcontainanysafeshutdowncomponentsand/orcablesinFireZones3,36and48.FireZone69containstheUnit1andUnit2CCWsurgetankmanualisolationvalves.FireZones32and69containcablesassociatedwithtwooftheUnit1safetyinjectionaccumulatorisolationMOVS.FireZone69alsocontainsUnit1cablesassociatedwithtwopressurizerPORVs,twopres-surizerblockvalves,tworeactorheadventvalvesandtwopost-accidentsamplingvalves.ThefireareaconsistingofFirePage9-73 Zones49,50,51,and52containssafeshutdowncomponentsand/orcablesinFireZones50,51and52.ThecompliancemethodinthisfireareaispresentedinTable1-1.FireProtectionEuimentFireZones32,48and69areprovidedwith.ionizationsmokedetectorsandpartialdetectioncoverageisprovidedinFireZone'"3.DrypilotpreactionsuppressionsystemsareprovidedinFireZone32andpartialcoverageisprovidedinFireZone3.Inaddition,FireZone69isprovidedwithanautomaticthermistordetectionsystemand.ma'nualdelugesystemfortheHVACcharcoal:.'filterunits.FireZones49,50,51,and52areprovidedwith~automaticfireprotectionfeatures,specificallyareaionizatione'smokedetectionandeachcharcoalfilterunitisprovidedwitha~manualdelugesystem"withanautomaticthermistordetectionsystem.Anautomaticdrypilotpreactionsuppressionsystemis'providedinthenormally'accessibleareasofFireZones51and52.FireHazardsAnalsisTheequivalentfireseverityinthefireareacontainingFireZones'3,32,36,48and69is15minutes(theactualfire-severityexistingatthistimeis5minutes)andinthefireareacontainingFireZones49,50,51and52is35minutes(theactualfireseverityexistingatthistimeis21minutes).Theequivalentfireseverityofthecombinedfireareasis25minutes(theactualfireseverityexistingatthistimeis12minutes).Page9-74 TheMarch1983Submittal"Safe-ShutdownCapabilityAssessmentandProposedModifications"to10CFR50,AppendixR,SectionIII.G.,genericallyidentifiedforallareasoftheplantforthesafetyinjectionaccumulatorvalvesto.bemanuallyoperatedforcoldshutdownandforthepressurizerPORVs,reactorheadventvalves,andthepost-accidentsamplingvalvestobedeenergizedtoafailsafeposition.RefertoSection4.4.5andTable4-3respectively.Sincethesetwomanualactionscanbeperformedindependentofanyfireareawithintheplant,combiningthetwofireareasintoasinglefireareawouldnotimpairsafeshutdowncapabilityor.changethecompliancestrategyforeitherfirearea.Aa'resultnoadditionalsafeshutdowncomponentsorcablesneededtobeevaluatedbeyondwhatwasanalyzedintheoriginalsubmittal.ConclusionBasedonthepreviousevaluation,combiningFireZones3,32,36,48,69,49,50,51and52intoasinglefireareawouldnotadverselyimpactonredundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.The'aseswhichjustifythisconclusionaresummarizedasfollows:(1)CombiningFireZones3,32,36,48,49,and69withFireZones49,50,51,and52toformonefireareawouldnotimpairsafeshutdowncapability.(2)Manualactioncanbetakenindependentofthefireareasofconcerntomitigatetheconsequencesofanypossiblespuriousactions.Page9-75 (3)Thesafetyinjectionaccumulatorvalvescanbeclosedmanuallyforcoldshutdown.(4)FireZones32,50,51,52and69,whichincludesafeshutdowncomponentsand/orcircuits,areanalyzedandcompliancemethodsareidentifiedinSection1ofthisreport.(5)ThecombustibleloadinginFireZones3,32,36,48,and69is"under15minutes.FireZones32,48and69areprovidedwithionizationsmokedetectors,withpartialcoverageinFireZone3.FireZones3and32areprovidedwithautomaticdrypilotpreactionsprinklersystems,withpartialcoverageinFireZone3.FireZones36and69containtransientcombustibles,butsincebothofthesezonesarecontrolledaccessareas,transientcombustiblesdonotpresentaproblem.(6)AnautomaticdrypilotpreactionsuppressionsystemisprovidedinthenormallyaccessibleareasofFireZones51&52.(7)Manualdeluge.waterspraysystemisprovidedforthecharcoalfilterunitslocatedinFireZone52.(8)UpgradingtheboundarybarrierseparatingFireZones3,32,36,48,and69fromFireZones49,50,51,and52willnotsignificantlyenhancethesafeshutdown.capabilityortheprotectionaffordedbytheexistingconfiguration.9.10FireArea43andFireZone44NBoundarEvaluation'~PuroeeThepurposeofthisevaluationistoanalyzetheimpacton.redundantsafeshutdowncapabilityofcombiningFireArea43withthefireareaconsistingofFireZones44N,44S,44Athrough44H,and37.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-76 TheMarch1983submittal,"SafeShutdownCapabilityAssessmentandProposedModifications"to10CFR50,AppendixR,SectionIII.Gidentifiedtheaccesscontrolareaasaratedfirearea(FireArea43).FireArea43hasbeenreclassifiedasafirezoneandisnowconsideredpartofthefireareacontainingFireZones37,44Athrough44H,44Sand44N.TheconsolidationofFireZone43intotheabovedefinedfireareawasmadeasaresultofunratedbarrierpenetrationscommunicatingwithFireZone44N.SafeShutdownEuimentFireArea43doesnotcontainanysafeshutdown.components;however,powercablesto600VMCCs.AM-A.and'AM-DofUnit1.traversethroughthisarea.Lossofthese,powercableswouldresultinasubsequent.lossofpowertotheUnit,lcomponentcoolingwater(CCW)pumpsuctionvalves(CMO-411and413)andCCWheatexchangeroutletvalves(CMO-410and420).Inaddition,powerislosttotheUnit1CCWheatexchanger15Eessentialservicewaterinletandoutletvalves(WMO-731and733).FireProtectionEuimentAutomaticorfixedsuppressionfeaturesarenotprovidedinFireArea43,butionizationtypesmokedetectorsareinstalled'ndmanualfirefightingequipmentisavailable.FireZones44Nand44Sareprovidedwithfullareaautomaticdrypilotpreactionsprinklersandionizationdetectorsinnormallyaccessiblelocationsofeachzone.Page9-77 FireHazardsAnalsisAvailablemanualoperationofUnit1CCWpumpsuctionvalve44S(CMO-413)andCCWheatexchanger15Woutletvalve44N(CM0-420),locatedinFireArea44,willallowaliqnmentofthecoolingwaterflowpathfortheUnit1centrifugalchargingpump(-pp-5OW).RemoteoperationalcapabilityofotherhotsafeshutdownsystemcomponentsisnotaffectedbyafireinFireZone43.ThezoneadjacenttoFireZone43is44Nand,asdescribedinthisreport,FireZone44Nistobeprovidedwithalternateshutdowncapabilityoutsideofthe'firezone..ThecablestraversingFireZone43(powerfeedstoAM-AandAM-D)arealsoroutedthroughFireZone44N.Thus,themethodofsafeshutdownforFireZone44Ntakesintoaccounttheexistenceof.;thesepowerfeedsto'M-AandAM-DMCCsandthus,consolidatingFireZone43-intothefireareacontainingFireZone44Nhasnoimpactonsafeshutdown,capability.Manualoperationoftheaffectedvalvesassociatedwiththetwomotorcontrolcentersisavailableandconsideredinbothfirezones(43and44N).Thus,safeshutdownconditioncanbeachievedandmaintainedbyperformingmanualoperationofotherrequiredsafeshutdowncomponentsfromoutsideofthefirezone.ConclusionsBasedonthepreviousevaluations,combiningFireArea43intoalargerfireareathatincludesFireZones37,44N,448,Page9-78 Oand44Athrough44Hwillnotadverselyimpactonredundantsafeshutdowncapability.Inaddition,thisevaluationwillnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesforthisconclusionaresummarizedasfollows:(l)CombiningFireZone43(formallyFireArea43)intothesamefireareacontainingFireZone44Nwouldnotimpairsafeshutdowncapability.(2)ThecombiningofFireZone43intothefireareacontainingFireZone44Nwillnotaddmoresafeshutdowncomponents,circuitsandcablesabovethosealreadyexistinginFireZone44N.',gnp~q(3)FireZone44N,whichincludesthecomponents,circuitsandcablesrequiredforsafeshutdown,isprovidedwithautomaticpreactionsprinklersandsmokedetectors.(4)FirepropagationfromFireZone44NtoFireZone43wouldnothaveadetrimentalimpactonthesafe,shutdowncapability.(5)FireZone43isprovided.with.manual.firefightingequipmentandsmokedetectors.Transientcombustiblesdoexistinthearea,butsince-FireZone43iscontinuouslymanned,transient"combustiblesdonotpresentaproblem.(6)'The'.wallsandceilingsbetweenFireZones43and44N,althoughnotfire-rated,wouldlimitthepotentialinvolvementofFireZone44NasaresultofafireinFireZone43.(7)UpgradingtheboundarybarrierseparatingFireZones43and44Nisnotrequiredascombiningthesetwozonesintoalargerfireareadoesnotimpactonthesafeshutdowncapability.Page9-79 9.11Units1and2TurbineBuildin,MainSteamPieTunnelsandServiceOfficeBuildinEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofcombiningtheTurbineandServicelOfficeBuildingsandtheUnit1andUnit2mainsteampipetunnels(FireZones108,109,110andill)intoonefirearea.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.IntheMarch1983AppendixRsubmittal,ten(10)separatefireareaswereidentifiedintheTurbineBuilding.Seven(7)ofthefireareasweremadeupofindividualfirezones.'TheywereidentifiedasFireAreas78,-83,88and89onthe591ftelevation,andFireAreas94,95,and100onthe609ftelevation.Theremainingthree(3)fireareasconsistedofmultiplezonesonvariouslevelsoftheTurbineBuilding.OnefireareaconsistedofFireZones112,113,114,and115;asecondconsistedofFireZones2,77,79,80,81,82,90,91,92,93,126,and127(theUnit1sideoftheTurbineBuilding);thethirdconsistedosFireZones84,85,86,87,96,97,98,99,124,125,and128(theUnit2sideoftheTurbineBuilding).Page9-80 Duringthecourseof-theongoingAppendixRconsolidationeffort,,severalinconsistencieswerenotedbetweentheprotectionprovidedfortheboundariesoftheidentifiedfireareasandNRCcriteriacontainedwithinvariousdocuments(mostnotablyGenericLetter83-33).Onesuchinconsistencywasunratedwatertightdoorsandunprotectedventilationopeningsinthewallseparating1,FireZones112and113fromFireZone2,whichwereidentifiedasIbeinginseparatefireareas.Asecondinconsistencywasanunprotectedopen'stairwayinthefloor/ceilingassemblyseparatingFireZone2fromFireZone84,whichwereidentifiedasbeinginseparatefireareas.Athirdinconsistencywas'nrateddoorassembliesandunprotectedopeningsbetweenthemain'teampipetunnels(FireZones110andillforUnit1'ndUnit2,respective'ly)andfirezones"intheTurbineBuildingfireareas(FireZones80and91forUnit1andFireZones,84and96forUnit2).Inadditiontotheinconsistenciesintheboundariesof'reviouslyidentifiedfireareas,thoseplantlocationswhichwerenotidentifiedintheMarch1983submittal(nofirezonesorNFZ's)presentedproblemsSpecifically,withjustifyingthefireareatheTurbineDeckonthe633ft-elevationisopentoboththeUnit1andUnit2TurbineBuildingBuilding-fireareatothenorth.TheseplantlocationsarenowidentifiedasFireZones129,130,and131,respectively..fireareasandtheServiceBuildingabutstheUnit1TurbinePage9-81 SafeShutdownEuimentFireZone108containsthefollowingsafeshutdownequipmentandtheirassociatedcables:(1)Unit1steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and.3;(3)Steamgenerators2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators2and3safetyreliefvalves;and(5)Unit1turbine-drivenAFWpumpsteamsupplyisolationvalves.FireZone109containsthefollowingsafeshutdownequipmentandtheirassociatedcables:(1)Unit2steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and3;(3)Steamgenerators2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators2and3safetyreliefvalves;and(5)Unit2turbine-drivenAFWpumpsteamsupplyisolationvalves.RedundantsafeshutdowncapabilityisavailableforbothFireZone108andFireZone109outsideofthefireareainwhichtheybotharelocated.Therefore,firecouldinvolvebothFireZones108,and109withoutimpactingonredundantsafeshutdowncapability.FireZones112,113,114and115containtheSWcross-connectandDGcoolingvalves.andassociatedcables.VarioussafeshutdowncablesareroutedthroughFireZones79,80,84,85,91and110.Thegreentrai'ncablesinFireZones79and85areprotectedtoensureonetrainofredundantsystemsisavailableintheeventofafireengulfingUnit1orUnit2TurbineBuilding.Page9-82 FireProtectionEuimentFireZones79and85areprotectedbyautomaticdetectionandwetpipesprinklerssystems.AutomaticwetpipesprinklersystemsareprovidedinFireZones77through94andFireZones96through99.Automaticthermistor,detectionandC02suppressionareprovidedinFireZones83,88,=95and100,withdrypilotpreactionsprinklersystemsprovidedinFireZones95and100.TheturbinesinFireZones129and130areprovidedwithautomaticthermistordetectionandmanualdelugesuppressionundertheappearancelagging,anddrychemicalsuppressionfortheturbinebearings.FireZone124,125,126,and127containvariouslevelsofautomaticdetectionandsuppressioncapabilities.~~FireHazardsAnalsisInordertoresolveboththeinconsistenciesbetweenpreviouslyidentifiedfireareasandtheimpactoftheNFZ's,anAppendixRsafeshutdownanalysishasbeenperformedwithrespecttocombiningtheselocationsintoasinglefirearea.Theresultsarethefollowing:(a)WhenUnit1MainSteamPipeTunnelArea(FireZones108and110)iscombinedwithTurbineBuildingArea,Unit1canbesafelyshutdownbyusingUnit2EastAuxiliaryFeedwaterPump.ThisalternateshutdownactionwillberequiredwhenafirepropagatesbetweenFireZones108and79.Forafiretopropagatebetweenthesefirezones,thefirewouldhavetobeofsufficientdurationandintensitytoengulfFireZones110and80(FireZone80isprotectedbyanautomaticsprinklersystem).Page9-83 (b)WhenUnit2MainSteamPipeTunnelArea(FireZones109and111)iscombinedwithTurbineBuildingArea,Unit2canbesafelyshutdownbyusingUnit1EastAuxiliaryFeedwaterPump.ThisalternateshutdownactionwillberequiredwhenafirepropagatesbetweenFireZones109and85.Forafiretopropagatebetweenthesefirezones,thefirewouldhavetobeofsufficientdurationandintensitytoengulfFireZonesill,and84(FireZone84isprotectedbyanautomaticsprinklersystem).*(c)WhenbothUnit1andUnit2MainSteamPipeTunnelareasarecombinedtogetherwiththeTurbineBuildingintoonefirearea;'safeshutdownisnotimpactedforeitherunit.Inthehighlyunlikelyeventofafireinvolvingalloftheabovementionedfirezones,bothunitscanbesafelyshutdownusingoppositeunitsAuxiliaryFeedwaterPumps.Forthisfirescenario,onetrainoftheothersafeshutdownsystemswillbeavailableforeachunit.Requiredmanua'1'-actionsare(1)openingoftheAFWCross-ConnectValvesand(2)isolationofthesteamsupplypathstoUnit1Turbine-DrivenAFWPump.Therewouldbenorequirementforone.orthreehourbarriers,'additionaldetectionorsuppressionsystems,orexemptionrequestsinordertomeetthecriteriaofAppendixRto10CFR50.Assuch,thefollowingfirezonesarenowconsideredtobepartofasinglefirearea: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.ConclusionBasedonthepreviousevaluation,thetenfireareasintheUnit1andUnit2TurbineBuildings,theentiretyoftheServiceBuilding,themainturbinedeck,andtheUnit1andUnit2mainsteampipetunnelscanbecombinedintoasinglefirearea.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesforthisconclusionaresummarizedasfollows:Page9-84 (1)ThegreentraincablesareprotectedtoensureonetrainofredundantsystemsisavailableintheeventofafireengulfingUnit1orUnit2TurbineBuilding.(2)Duetothelocationofdetectionandsuppressionsystemsintheinterveningzonesbetweenthefirezonescontainingsafeshutdowncablesand/orequipment,itishighlyunlikelythatfirecouldspreadtoallfirezones.(3)Shouldfirespreadtoallfirezones,alternateshutdowncapabilityisavailablebyusingoppositeunitauxiliaryfeedwaterpumpsandmanualoperations.9ei2TurbineBuildinandScreenHouseBoundarEvaluation~PuruseThepurposeof'hisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofcombiningtheTurbineBuilding,MainSteamPipeTunnels,andService/OfficeBuildingfireareawiththeScreenHouseFireArea(exclusiveoftheEssentialServiceWaterPumpFireArea,FireZones29Athrough29G).Inaddition,portionsoftheTurbineBuildingthatwerenotpreviouslyidentifiedinthe1983AppendixRsubmittalwillbecombinedwiththeTurbineBuildingFireArea.ThesenewfirezonesincludeFireZones139,140,141,and143.TheScreenHousefire,zonesunderconsiderationincludeFireAreas28and30,andFireZones142and143.FireZones142and143areportionsoftheScreenHousethatwerenotpreviouslyidentifiedinthe1983AppendixRsubmittal.ThecombinationoftheTurbineBuildingandScreenHousefireareaswillreducethenumberofareaboundariesthatrequiresurveillanceandwillnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-85 DescritionFireAreas28and30aretheUnit1=andUnit2DieselFire,PumpRoomslocatedonthe591ftelevationoftheScreenHouse.FireZone142isthetravelingscreenandcirculatingwaterpumpareasoftheScreenHouse,locatedonthe591ftelevation.FireZone143istheintakeanddischargeareabelowthebasementoftheScreenHouseandTurbineBuilding.FireZone139istheTurbineRoomsumplocatedonthe570ft-9in.elevationoftheTurbineBuilding.FireZone140isthecausticstoragetankroomlocatedonthe571ft-9in.elevationoftheTurbineBuilding.-FireZone141isthescreenwashpumproomlocatedonthe571ft--",.9in.elevation.oftheTurbineBuilding.FireZones2,77<<.through.100,108through115,.and124through131makeupthe"balance-oftheTurbineBuildingFireArea.SeeSection9.11of'.;thisreportforamoredetaileddescriptionofthesefirezones.,'.SafeShutdownEuimentFireZones139,140,141,142,143andFireAreas28and30donotcontainsafeshutdowncablesorcomponents.Section9.11ofthisreportident,ifiedsafeshutdowncapabilitiesintheTurbineandService/OfficeBuildingsandMainSteamTunnelsfirearea.FireProtectionEuimentAutomaticwetpipesprinklersystemsareprovidedinFireAreas28and30.TheremainingfirezoneslocatedintheScreenhousearenotprovidedwithautomaticdetectionorPage9-86 suppressioncapability.SeeSection9.11ofthisreportforamoredetaileddiscussionofthefireprotectionfeaturesoftheTurbineandService/OfficeBuildingsandMainSteamTunnels.FireHazardsAnalsisFireZones139and143havefireseveritieslessthan10minutes(actualfireseverityexistingatthistimeiszero).FireZones140and141containlowamountsofcombustiblematerialswithequivalentfireseverityunder25minutes(actualfireseverityexistingatthistimeis2.6and1.5minutes,respectively).The<combustiblesinFireZone142andFireAreas28and30arelocatedintheScreenHouse,whichisseparatedfromtheTurbineBuildingbyan8-in.concretewallandtwoaccessdoors.TheautomaticwetpipesprinklersystemprovidedineachDieselFirePumpRoom(FireAreas28and30)woul,dcontroland/orextinquishanyfirestartingfromtheserooms.Thesafeshutdown'cablesthatexistintheTurbineBuildingFireAreaarealllocatedinthevicinityofColumnLineH,whichisapproximately150ftfromthewalltotheScreenHouse(ColumnLineA).ConclusionReasonableassuranceexiststhatthecombustiblesintheScreenHouseandnewlyidentifiedTurbineBuildingfirezoneswouldnotendangerthesafeshutdowncapabilityintheTurbineBuilding.Inaddition,thisevaluationdoesnotadverselyimpactPage9-87 onotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarized=asfollows:(1)IfafireshouldstartineitherDieselFirePumpRoom(FireArea28or30)wherethehighestconcentrationsofcombustiblesexist,the.automaticwetpipesprinklersystemwouldcontroland/orextinguishthefire.(2)An8-in.concretewallwithtwoaccessdoorsseparatestheScreenHousefromtheTurbineBuilding=firearea.(3)ThesafeshutdowncablesintheTurbineBuilding.areseparatedfromtheScreenHousewallbyapproximately150(4)FireZones139,140,141,and30donotcontaincomponents.142,143.and.F.ire.Areas,28.safeshutdowncablesor.(-5)"Onetrainof,safe,shutdownsystems,components,andcablesexistsindependentofthecombinedTurbineBuildingand.ScreenHousefireareas.9.13FireArea53andFireArea57HatchEvaluationlt'PuroseThepurposeofthisevaluationistoanalyzetheimpactofanunratedsteelplatehatchlocatedbetweentheUnit1ControlRoomandtheUnit1ControlRoomCableVault(FireArea,53andFireArea57,respectively)oneitherredundantsafeshutdowncapabilityortherequestforafixedsuppressionexemptioninFireArea53inSection7.11ofthisreport.Athree-hourfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthislocation.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-88 FireArea53islocatedonthe633ftelevationoftheAuxiliaryBuilding.FireArea57islocateddirectlybelowonthe624ft-0in.elevation.Thebarrierseparatingthetwoareasisconstructedofreinforcedconcretewithathree-hourfirerating;however,anunratedsteelplatehatchintheflooroftFireArea53providesaccesstoFireArea57.SafeShutdownEuimentFireAreas53and57containallcontrolandinstrumentationcablingrequiredfor~safeshutdownofD.C.CookUnit1.Shouldaenfireoccurineitherfirearea,completealternateshutdowncapabilityoutsideof.both-areasis.providedusingUnit2equipment.FireProtectionEuimentAutomaticionizationdetectionsystemsareinstalledinFireArea53andFireArea57.AutomaticsuppressionisnotprovidedinFireArea53.FireArea57isprotectedbyanautomatictotalfloodingHalon1301suppressionsystemandbyamanuallyactuated.totalfloodingC02suppressionsystem.Manualsuppressioncapabilitiesintheformofportableextinguishersandhose.stationsareavailableforuseinbothfireareas.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceilingassemblyseparatingFireArea57onthe624ft-0in.elevationfromFireArea53onthe633ftelevation.ForafiretoPage9-89 propagatebetweenFireArea57andFireArea53,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherent.fireprotectioncapabilitiesofthesteelplatehatch.Thefailurepointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60~ofitsyieldstrength.Thislimitnormallyoccurswhenthetemperatureofthesteelreaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfireseverityof5-10minutesisrequiredtoachievethis:temperature.Althoughthesteelplatehatchisnotaload-carryingstructuralcomponent,thefailurecriteriaofstructural'steelcanbe.,appliedtothesteelplatehatchtoestablishaconservative"baseabovewhich'failurecouldbepostulated.-FireArea.-57-'has-ixedcombustibleloadingofunder1'20,000=Btu/ftforanequivalentfireseverityofapproximately90minutes(theactualcombustibleloadings"andequivalentfireseverityexistingatthistimeare103590Btu/ftand77.8.minutesrespectively).Anequivalentfireseverityof90minuteswouldraisethetemperatureofthesteelplatehatchtowellover1000Fifthefire:,was.,not~promptlydetectedandextinguished.Anautomatictotalflooding'Halon1301suppressionsystemactuatedbythedetection-systemisprovidedinFireArea57.ShouldtheHalon1301systemfailtoextinguishthefire,thetotalfloodingC02systemwouldbemanuallyactuated.ThePage9-90 combinationofautomaticdetection,automaticHalon1301suppression,andmanuallyactuatedC02asabackupprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireArea57wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotect'heopeninginthebarrier.Theexistenceoftheautomaticdetectionsystemandtheautomati'cHalon1301andmanualC02suppressionsystemswilltendtomitigatetheimpactofincreasesinthefixedcombustibleloadingorthe.presenceoftransientcombustibles,providedthattheincreasesdonotexceedthe.capabilitiesofthesuppressionsystem.FireArea53isthecontinuously.'annedControlRoom.I.thasa,fixedcombustibleloadingof,.under47,,000Btu/ftforanequivalentfireseverityofunder35minutes.(Theactualcombustible"loadingand'equivalentfireseverityexisting,atthistimeare28,225Btu/ftand21.2minutes,respectively.)Theamount.oftransientcombustiblesallowedintheControlRoomandwillbecontrolled.Anequivalentfireseverityof35minutescouldraisethetemperatureofthe,hatchabove1000F.Twoconsiderationsmustbetakenintoaccount.First,thesteelplatehatchislocated.inthefloorofFireArea53.Thehighertemperaturesassociatedwithafireinthisareawouldtendtobenearceilinglevel.Floor-based'emperaturesshouldbeconsiderablylowerthanthoseattheceiling.Page9-91

'econdly,thefireareaiscontinuouslymannedbytrainedoperators.Manualfirefightingactivitiescanbeexpectedto-takeplacealmostimmediatelyafterdetectionofthefire.Thereisreasonableassurance,therefore,thatafireinvolvingfixedand/ortransientcombustiblesinFireArea53wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireinFireArea53orFireArea57would'ot',impairthesafeshutdowncapabilitiesofD.C.CookUnitl.In.>addition,,this.evaluationdoesnotimpactonthebasesofthe-"fixedsuppressionexemptionrequestforFireArea53oronotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusionaresummarizedasfollows:(2)(3)Anequivalentfireseverityof5-10minutesisrequiredtoraisethetemperatureofload-carryingstructuralsteeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeused'oestablishaconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.FireArea57hasanequivalentfireseverityof90minutes;however,automaticdetection,automaticHalon1301suppression.andmanuallyactuatedC02suppressionwillresultindetectionandsuppressionofafireinthisareainitsincipientstages.Increasesinthefixedand/ortran'sientcombustibleloadingsinPage9-92 FireArea57shouldalsobemitigatedbythepresenceofthedetectionandsuppressionsystems,providedthattheincreasesdonotexceedsystemcapabilities.(4)TheequivalentfireseverityofFireArea53isunder35minutes.(5)Thehatchislocatedinthefloor,andfloor-basedtemperaturescanbeexpectedtobesignificantlylowerthanthoseatceilinglevel.(6)AnautomaticdetectionsystemisprovidedinFireArea53.(7)FireArea53iscontinuouslymanned.Manualfirefightingactivitiescanbeexpectedalmostimmediatelyafterdetectionofthefire.(8)Shoulda-Hreoccurin"eitherFireArea53orFireArea57,completealternateshutdowncapabilityoutsideofbothfireareasisprovidedusingUnit2equipment.,(9),Replacingthesteelplatehatchwithoneoffire-rated'constructionwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9.14FireZone43andFireArea56HatchEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactofanunratedsteelpl'atefloorhatchlocatedbetweentheAccessControlAreaandtheUnit1AuxiliaryCableVault(FireZone43andFireArea56,respectively)onredundantsafeshutdowncapability.Athree-hourfire-ratedhatchassemblyisnot,commerciallyavailableforuseinthislocation.Inaddition,thisevaluationdoesnotadversely,impactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-93 DescritionFireZone43islocatedonthe609ft-6in.elevationoftheAuxiliaryBuilding.,ItispartofalargerfireareathatincludesFireZones37,44N,44S,and44Athrough44H.FireArea56islocateddirectlyaboveFireZone43onthe620ft-6in.elevationoftheAuxiliaryBuilding.Thebarrierseparatingthetwozonesisconstructedofreinforcedconcretewithathree-hourfirerating;however,anunratedsteelplatehatchintheceilingofFireZone43providesaccesstoFireArea56.SafeShutdownEuimentFireZone43andFire'rea56containcablesrequiredforsafeshutdown.of.D.C.CookUnit1..Shouldafireoccurineitherofthese,'locations,completealternateshutdowncapabilityisprovidedoutsideof.the-fireareaand=firezoneusingUnit2equipment.-FireProtectionEuimentAutomaticionizationdetectionsystemsareinstalledinFireZone43belowthesuspendedceilingandinFireArea56.FireZone43isnotprotectedbyautomaticsuppression.FireArea56isprotectedbyan.automaticC02totalfloodingextinguishingsystemthatis.activatedbythedetectionsystem.Manualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinbothlocations.Page9-94

'FireHazardsAnalsisThesteelplatehatchis.locatedinthefloor/ceilingassemblyseparatingFireZone43on"the609ft-6,in.elevationfromFireArea56onthe620ft-6in.elevation.ForafiretopropagatebetweenFireZone43andFireArea56,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherentcapabilitiesofthesteelplatehatch.Thefailurepointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60%ofitsyieldstrength.Thislimitnormallyoccurswhenthetemperatureof.thesteelreaches1000F.UndertheASTM.E119StandardTime-Temperaturecurve,,anequivalentfire='.:severity.of5-l0'minutes-:i'requiredto,achievethis'temperature."'Thesteelplatehatchisnotaload-carryingstructural.component;however,the=failurecriteriaofstructuralsteelcanbe'appliedto:thesteel-platehatchtoestablishaconservativebaseabovewhichfailure-,couldbepostulated.FireZone43isanormallymannedlocation;however,duringsomebackshiftperiodswithreducedmanning,theRPdutiesmayIrequire.thezonetobeunoccupied.Afixedcombustibleloadingcofunder80,000Btu/ftforanequivalentfireseverityof'60'.2minutesexistsinFireZone43.(Theactualcombustibleloading.andequivalentfireseverityexistingatthistimeareunder74,361Btu/ftandunder56minutes,respectively.)The2equivalentfireseverity(60minutes)inFireZone43willraisePage9-95 thetemperatureofstructuralsteeluptoitsfailurepoint(5-10minutes).However,afireinthiszoneshouldbedetectedinitsincipientstagesbyeithertheautomaticdetectionsystemorthepersonnelnormallymanningthe,area.Thiscombinationofautomaticdetectionand"normalmanningprovidesreasonableassurancethatafireinvolving"fixedand/ortransientcombustiblesinFireZone43wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoadequatelyprotecttheopeninginthebarrier.FireArea56hasafixedcombustibleloading-ofunder"80;000'tu/ftforanequivalentfire'everityofapproximately60minutes,-(theactualcombustible.loading..andequivalentfireseverityexistingatthistimeare68,120Btu/ftand51minutesrespectively)..Anequivalent.fireseverityof60minuteswouldraisethetemperatureofthesteel-platehatchto'over1000Fifthefirewasnotpromptly'etectedandextinguished.AtotalfloodingautomaticC02systemisprovidedinFireArea56.Itisactuatedbytheionizationdetectionsystem.ThecombinationofautomaticdetectionandCO2suppressionensuresdetectionandsuppressionofafireinFireArea56initsincipientstages.ThisprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireArea56wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomaticdetectionandsuppressionsystemswill.tendtomitigateincreasesinthefixedPage9-96 combustibleloadingorthepresenceoftransient.combustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireinFireZone43orFireArea56wouldnotimpairthesafeshutdowncapabilitiesofD.C.CookUnit1.I.naddition,thisevaluationdoes-notadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport..Thebasesthat-justifytheconclusionaresummarizedasfollows:(1),Anequivalentfiresever.ity.of5-10,minutesisrequiredtoraisethe.temperatureofload-carryingstructuralsteeluptoitsfailurepointof;1000oF.(2)Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablishaconservativebase,abovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.(3).FireZone43hasanequivalentfireseverityof60minutes.(4)AnautomaticdetectionsystemisprovidedinFireZone43andisnormallymanned,therebyensuringearl.ydetectionoffire.(.5)TheequivalentfireseverityofFireArea56isunder60minutes;however,anautomaticallyactuated,'totalfloodingC02systemisprovided.(6)TheprovisionoftheC02systemactuatedbytheionizationdetectionsystem'nsuresdetectionandsuppressionofafireinFireArea56initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea56shouldalsobePage9-97 mitigatedbythepresenceofthedetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.(7)ShouldafireoccurineitherFireZone43orFireArea56,completealternateshutdowncapabilityusingUnit2equipmentisprovided.Therefore,shouldfirespreadbetweenthetwolocations,thesamealternateshutdownmethodwouldbeutilized.(8)Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsignificantlyenhance'heprotectionprovidedbytheexistingconfiguration.9.15FireZone40BandFireArea55HatchEvaluation~PuruseThepurposeofthisevaluationistoanalyzetheimpactofanunratedsteelplatefloorhatchlocatedbetweentheUnit14kVSwitchgearRoomandtheUnit1SwitchgearRoomCableVault(FireAZone40BandFireArea55,respectively)onredundantsafeshut-downcapability.'A.three-hourfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthislocation.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZone40Bislocatedonthe609ft-6in.elevationof~IC8theAuxiliaryBuilding.ItispartofalargerfireareathatincludesFireZone40A.FireArea55islocateddirectlyaboveFireZone40Bonthe625ft-10in.elevation.ThebarrierseparatingthetwoareasisconstructedofreinforcedconcretePage9-98 withathree-hourfirerating;however,anunratedsteelplateha'tchintheceilingofFireZone40BprovidesaccesstoFireArea55.SafeShutdownEuimentFireZone40BandFireArea55containcablesandequipmentrequiredforsafeshutdownofD.C.CookUnit1.Shouldafire'ccurineitherFireZone408orFireArea55,completealternateshutdown-capabilityoutsideofthefireareaorzoneisprovidedusingUnit2equipment.FireProtectionEuimentAutomaticionizationandinfrareddetectionsystemsareinstalledinFireZone40B.andFireArea55.Anautomatic.total'loodingC02suppressionsystemisprovided.inFireZone,40B.-.AnautomatictotalfloodingCO'2suppressionsystemisalsoprovidedinFireArea55,exceptthat.coveragedoesnotextendintotheCDBatteryRoom.(ThehatchisnotlocatedintheCDBatteryRoom.)ManualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinbothFireZone40BandFireArea55.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceilingassemblyseparatingFireZone40Bonthe609ft-6in.elevationfromFireArea55onthe625ft-10in.elevation.ForafiretopropagatebetweenFireZone40BandFireArea55,afireofsufficientdurationandintensitywouldberequiredtochallengePage9-99 theinherentfireprotectioncapabilitiesofthesteelplatehatch.-Thefailure-pointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60~ofitsyieldstrength.Thislimitnormallyoccurswhenthetemperatureofthe,steel-.reaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfires'everityof5-10minutesisrequiredtoachievethistemperature.Althoughthesteelplate'hatchisnotaload-carryingstructuralcomponent,thefailurecriteriaofstructuralsteel"canbeapplied'tothe-steel"plate'-:'atchtoestablishaconservativebaseabovewhichfailurecouldbe.postulated...,FireZone.40Bhas,afixedcombustibleloadingofunder33,000Btu/ftforan.equivalentfireseverityofapproximately25minutes.(theactual'ombustible.loading,andequivalentfires'everityexistingatthistimeare18,144Btu/ft2and13.6minutesrespectively).Anequivalentfire-severityofunder25minuteswouldraisethetemperatureofthehatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.Ana'utomatictotalfloodingCO2suppressionsystemactuatedbyionizationand,infrareddetectors'sprovidedinFireZone40B.ThecombinationofautomaticdetectionandautomatictotalfloodingC02suppressionprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireZone40Bwouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.TheexistenceofthePage9-100 automaticdetectionandsuppressionsystemswilltendtomitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.Fire,Area55hasafixedcombustibleloadingofapproximately47,000Btu/ftforanequivalentfireseverityofapproximately35minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare33,536Btu/ftand25.1minutesrespectively).Anequivalentfireseverityofunder35minuteswou4d.raise'he,,temperatureofthesteelplatehatchtoover,1000Fifthefirewas'otpromptlydetectedandextinguished.Anautomatic..totalfloodingC02.suppression-system(whichdoesnotprotectthe.CDBatteryRoom)".actuatedby-ionization.andinfrareddetectors~is'rovidedi~nFireArea55)The.,combinationof,automaticdetectionandautomatictotalfloodingC02,suppressionprovides.reasonable.assurancethat"afireinvolvingfixedcombustiblesinFireArea55wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomaticdetectionandsuppressionsystemswilltendtomitigate'ncreasesinthefixedcombustibleloadingorthepresenceof..transientcombustibles,providedthattheincreasesdonotexceed'-thecapabilitiesofthesuppressionsystem..Page9-101 ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireinFireZone40BorFireArea55wouldnotimpairsafeshutdowncapabilitiesofD.C.CookUnitl.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusionaresummarizedasfollows:(2)(3).(4)(5)Anequivalentfireseverityof5-10minutesisrequiredtoraisethetemperatureofload-carryingstructuralsteeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablish,aconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection..FireZone40Bhasan.equivalentfireseverityofunder25minutes;however,automaticdetectionandautomaticC02suppressionwouldresultindetectionandsuppressionofafireinFireZone40Binitsincipientstages.Increasesinthefixedand/ortransientcombustibleloadinginFireZone40Bwouldbemitigatedbythepresenceoftheautomaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.FireArea55hasanequivalentfireseverityofunder35minutes;however,automaticdetectionandautomaticC02suppression(exceptfortheCDBatteryRoom)wouldresultindetectionandsuppressionofafireinFireArea55initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea55(excludingtheCDBatteryRoom)wouldbemitigatedbythepresenceoftheautomaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.ShouldafireoccurineitherFireZone40BorFireArea55,completealternatecapabilityisprovidedPage9-102 outsideofthefireareaorzoneusingUnit2equipment.(6)Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9.16FireArea41andFireArea55HatchEvaluation~PuroeeThepurposeofthisevaluationistoanalyzetheimpactofanunratedsteelplatehatchlocatedbetweentheUnit1EngineeringSafetySystemandMCCRoomandtheUnit1SwitchgearRoomCableVault(FireArea41andFireArea55,respectively)onredundantsafe,shutdowncapability.Athree-hourfire-ratedehatchassemblyisnotcommerciallyavailablefor=,'use,inthislocation.Inaddition,,thisevaluationdoes.notadversely:impactonotherevaluationsor.exempt-ionrequests;contained,inthisreport.DescritionFireArea41islocatedonthe609ft-6in.elevationoftheAuxiliaryBuilding.FireArea55islocateddirectlyaboveFireArea41onthe625ft-10in.elevation.Thebarrierseparatingthetwoareasisconstructedofreinforcedconcretewithathree-hourfirerating;however,asteelplatehatchintheceilingofFireArea41providesaccessintotheBatteryRoomenclosureof'ireArea55.Page9-103 SafeShutdownEuimentFireArea41andFire.Area55containcablesandequipmentrequ'iredforsafeshutdownofD.C.CookUnit1.ShouldafireoccurineitherFireArea41orFireArea55,completealternateshutdowncapabilityoutside:ofbothfireareasisprovidedusingUnit,2equipment.FireProtectionEuimentAutomaticionizationandinfrareddetectionsystemsareinstalledinFireArea41andFireArea55.TheCDBatteryRoomenclosureofFireArea55isprovidedonlywithionizationdetection.Anautomatic'tota~lfloodingC02suppressionsystemisprovided,inFireArea41andFire.Area55.*,Automaticsuppressioncapability,isnotprovidedintheCD'BatteryRoomenclosure.Manualsuppression.*capabilitiesintheformofportable,extinguishers-and.;hose.stations,areavailableforuseinbothFireArea41and'ireArea55,includingtheCDBatteryRoomenclosure.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceilingassemblyseparatingFire,Area41onthe609ft-6in.elevationand,theCDBatteryRoomenclosureofFireArea55onthe625ft-10in.elevation.ForafiretopropagatebetweenFireArea41andFireArea55,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherentfireprotectioncapabilitiesofthesteelplatehatch.Page9-104 Thefailurepointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60%ofitsyieldstrength.Thislimitnormallyoccurswhenthetemperatureofthesteelreaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfire.severityof5-10minutesisrequiredtoachievethistemperature.Althoughthesteelplatehatchisnotaload-carryingstructuralcomponent,thefailurecriteriaofstructuralsteelcanbeappliedtothesteelplatehatchtoestablishaconservativebaseabovewhichfailurecouldbepostulated.FireArea-41hasafixedcombustibleloading,.ofunder40,0002Btu/ftforanequivalent.,fireseverity.ofapproximately30:4Iminutes(the,,actualcombustibleloading.and;equivalentfire.severityexistingat,.this,,timeare.,27,,614,Btu/ft.and20.7;.minutesrespectively).Anequivalent.,fire"severity.ofunder30'inuteswouldraisethetemperature..ofthehatchtoover1000F;ifthefirewasnotpromptlydetectedandextinguished.AnautomatictotalfloodingCO2suppressionsystemactuatedbyionizationandinfrareddetectorsisprovidedinFireArea41.-Thecombinationofautomaticdetectionandautomatictotal,floodingC02suppressionprovides,reasonableassurance'thata>fireinvolvingfixedcombustiblesinFireArea41wouldnot-adverselyimpactonthecapabilityofthesteelplate'atchto~protecttheopeninginthebarrier.TheexistenceoftheautomaticdetectionandsuppressionsystemswilltendtomitigateincreasesinthefixedcombustibleloadingorthepresenceofPage9-105 rtransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.FireArea"'5'asafixedcombustibleloadingofapproximately47,000Btu/ftforanequivalentfireseverityofa'pproximately35minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare33,536Btu/ftand25.1minutes,respectively).Anequivalentfireseverityofunder3Sminuteswouldraisethetemperatureofthesteelplatehatchover1000oFifthefirewasnotpromptlydetectedandextinguished.ThefixedcombustiblematerialsintheCDBatteryRoome'nclosurearethe'atterycasings.Transientcombustiblesarenotpostulated"inthislocationbasedoncontrolledaccess'tothe4kVRoomcomplex.Maintenanceactivitieswouldrequire.minimalalnountsofcombustiblematerials..Firewouldhavetospreadintot'eCDBatteryRoomenclosurefromtheremainderofFireAreaS5inordertoignitethecasings.AnautomatictotalfloodingC02suppressionsystem(whichdoesnotprotecttheCDBatteryRoom)actuatedbyionizationandinfrareddetectorsisprovidedinFireArea55.Thecombinationofautomaticdetectionandautomatictotalflooding-CO2suppressionprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireArea55wouldnotspreadintotheCDBatteryRoomenclosure,ignitethebatterycasings,andadverselyimpactonthecapabilityofthesteelPage9-106 platehatchtoprotecttheopeninginthebarrier.,IncreasesinthefixedcombustibleloadingorthepresenceoftransientcombustiblesoutsideoftheCD,BatteryRoomenclosureinFireArea55wouldbemitigatedby,thepresenceoftheautomaticdetection.andsuppressionsystems,providedthattheincreasesdonot.exceedthecapabilitiesof,thesuppressionsystem.ConclusionBasedontheaboveevaluation,reasonab'leassuranceisprovidedthatafireinFireArea41orFireArea55wouldnotimpairsafeshutdown-,capabilitiesofD.C.CookUnitl.Inaddition,thisevaluationdoes,notadverselyimpactonotherevaluationsorexemptionrequestscontainedin.thisreport.Thebasesthat.justifythe-conclusion'resummarized-asfollows:.(1)Anequivalent'fireseverity'of5-10minutes'srequiredtoraisethetemperatureof.load-carryingstructura'1steeluptoitsfailurepointof.1000F.=(2)Thesteelplatehatchisnotaload-carryingstructural"'"'component;"-however,a5-10minutefireseveritycanbeusedtoestablishaconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.(3)FireArea41hasanequivalentfireseverityofunder.30minutes;however,automaticdetectionandautomaticC02suppressionshouldresultindetectionandsuppressionofafireinFireArea41initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea41wouldbemitigatedbythepresenceofthe-automaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystems.Page9-107 (4)FireArea55hasanequivalentfireseverityofunder35minutes;however,automaticdetectionandautomaticC02suppression(exceptfortheCDBatteryRoom)shouldresultindetectionandsuppressionofafireinFireArea55initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea55(excludingtheCDBatteryRoom)wouldbemitigatedbythepresenceoftheautomaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystems.(5)TheonlycombustiblematerialsintheBatteryRoomEnclosurearethebatterycasings.FirewouldhavetospreadintotheenclosurefromtheremainderofFireArea55.(6)ShouldafireoccurineitherFireArea41orFireArea55,completealternatecapabilityisprovidedoutsideofthefireareasusingUnit2equipment.(7)Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.r9.17FireArea54andFireArea58HatchEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactofIanunratedsteelplatehatchlocatedbetweentheUnit2ControlRoomandtheUnit2ControlRoomCableVault(FireArea54andFireArea58,respectively)oneitherredundantsafeshutdowncapabilityortherequestforfixedsuppressionexemptioninFireArea54inSection7.12ofthisreport.Athree-hourfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthislocation.Inaddition,this,evaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-108 DescritionFireArea54islocatedonthe633ftelevationoftheAuxiliaryBuilding.FireArea58islocateddirectlybelowonthe624ft-0in.elevation.Thebarrierseparatingthetwoareasisconstructedofreinforcedconcretewithathree-hourfirerating;.however,anunratedsteelplatehatchin,thefloorofFireArea54providesaccesstoFireArea58.SafeShutdownEuimentFireAreas54and58containallcontrolandinstrumentationcablingrequiz'edforsafeshutdownofD.C.CookUnit2.Shouldafireoccurineitherfirearea,,complete,alternateshutdowncapabilityisprovidedoutsideofbothfireareasusingUnit'1equipment.FireProtectionEuimentAutomaticionizationdetectionsystemsare,installed'inFireArea54andFireArea58.Automaticsuppressionisnot,providedinFireArea54.FireArea58isprotectedbyanautomatictotalfloodingHalon1301suppressionsystemandbyamanuallyactuatedtotallyfloodingC02suppressionsystem.Manualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinbothfireareas.FireHazardsAnalsisThesteelplatehatchislocatedinthefloor/ceilingassemblyseparatingFireArea58onthe624ft-0in.elevationfromFireArea54onthe633ftelevation.ForafiretoPage9-109' propagatebetweenFireArea58andFireArea54,afireofs'ufficientdurationandintensitywouldberequiredtochallengetheinherentfireprotectioncapabilitiesofthesteelplatehatch.Thefailurepointofexposedstructuralsteelistakentobew'heni'tsload-carrying'apabilityisreducedto60%ofitsyieldstrength.Thislimit'ormallyoccurswhenthetemperatureofthesteelreaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfireseverityof5-10minutesisrequiredtoachievethis'emperature.Althoughthesteelplateh'atchis,notaload-carryingstructuralcomponent,thefailurercriteriaofstructuralsteel.canbe:appliedtothesteelplatehatchtoestablish.a"conservative'aseabovewhichfailurecouldbepostulated..FireArea'58'hasafixedcombustibleloadingofunder113,000Btu/ftforan'quivalent-.fireseverityofapproximately85minutes(theactualcombustibleloading.andequivalentfireseverityexistingatthistimeare99,344Btu/ftand74.7minutesrespectively).Anequivalentfireseverityofunder85minuteswouldraisethe-temperature.ofthesteelplatehatchtowellover1000oFifthefirewasnotpromptlydetectedandextinguished.AnautomatictotalfloodingHalon1301systemactuatedbyionizationdetectorsisprovidedinFireArea58.ShouldtheHalon1301systemfailtoextinguishthefire,thetotalfloodingC02systemwouldbemanuallyactuated.ThePage9-110 combinationofautomaticdetection,automatictotalfloodingHalon1301suppression,andmanuallyactuatedC02asabackupprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireArea58wouldnotadverselyimpacton-thecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomatic.detectionandsuppressionsystemswilltendtomitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.FireArea54isacontinuously-mannedControlRoom.Ithasafixedcombustibleloadingof47,000Btu/ft.foranequivalent<fireseverityofunder35.minutes.(The-actualcombustibleloadingandequivalentfireseverityexistingatthistimeareunder30,069Btu/ftand22.6minutes,respectively.)Theamount2oftransientcombustiblesallowedintheControlRoomwillbe'ontrolled.Anequivalentfireseverityofunder35minutescouldraisethetemperatureofthehatchabove1000F.Twoconsiderationsmustbetakenintoaccount.First,thesteelplatehatchislocatedinthefloorofFireArea54.Thehigher;temperaturesassociatedwithafireinthisareawouldtendtobe-nearceilinglevel.Floor-basedtemperaturesshouldbe'onsiderablylowerthanthoseattheceiling.Secondly,the-fireareaiscontinuouslymannedbytrainedoperators.Manualfirefightingactivitiescanbeexpectedtotakeplacealmostimmed'iatelyafterdetectionofthefire.ThereisreasonablePage9-111 assurance,therefore,thatafireinvolvingfixedand/ortransientcombustiblesinFireArea54wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Conclusio'nBasedon'he'boveevaluation,reasonableassuranceisprovidedthatafireinFireArea54orFireArea58would'notimpairthesafeshutdowncapabilitiesofD.C.CookUnit2orimpactonthefixedsuppressionexemptionrequestforFireArea54.Inaddition,thisevaluationdoesnot'adversely'impa'cton"'therevaluationsorexemptionrequestscontainedinthisreport.The,bases.that-justify.the.conclusionaresummarized'sfollows:(2)(3)(4)'nequivalentfireseverityof5-10minutesis'requiredtoraisethetemperatureofload-carryingstructuralsteelup.to,itsfailurepointof1000F.Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablishaconservative,.baseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.FireArea58hasanequivalentfireseverityofunder85minutes;however,automaticdetection,automaticHalon1301suppressionandmanuallyactuatedC02suppressionshouldresultindetectionandsuppressionofafireinthisareainitsincipientstages.Increasesinthe,fixedand/ortransientcombustibleloadingsinFireArea58wouldtendtobemitigatedbythepresenceoftheautomaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.I"TheequivalentfireseverityofFireArea54isunder35minutes.Page9-112 (5)Thehatchislocatedinthefloor,andfloor-basedtemperaturescanbeexpectedtobesignificantlylowerthanthoseatceilinglevel.s(6)AnautomaticdetectionsystemisprovidedinFireArea54.(7)FireArea54iscontinuouslymanned.Manualfirefightingactivitiescanbeexpectedalmostimmediatelyafterdetectionofthefire.4(8)Shouldafire,occurineitherFireArea54orFireArea58,completealtexnateshutdowncapabilityoutsideofbothfireareasisprovidedusingUnit1equipment.(9)Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsignificantlyenhancetheprotection.providedbythe,existingconfiguration.9.18FireZone52andFireArea59HatchEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactofanunratedsteelplatefloorhatchlocatedbetweenthe633ftelevationofthe-AuxiliaryBuildingandtheAuxiliaryCableVault(FireZone52andFireArea59,respectively)onredundantsafeshutdown"capability.,Athree-hourfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthislocation.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.DescritionFireZone52islocatedonthe633ftelevationoftheAuxiliaryBuilding.ItispartofalargerfireareathatincludesFireZones49,50,51,3,32,69,36,and48.FireAreaPage9-113 59islocateddirectlybelowthesouthwestcornerofFireZone52onthe622ft-6in;elevationoftheAuxiliaryBuilding.Thebarrierseparatingthetwoareasisconstructedofreinforcedconcretewithathree-hourfirerating;however,anunratedsteelplatehatchinthefloorofFireZone52providesaccesstoFireA'rea59..SafeShutdownEuimentFireZone52containscablesrequiredforsafeshutdownofD.C.CookUnits1and2.TheMarch1983AppendixRSubmittalidentifiedmethodsofachievingcompliancewith."Appendix-Rinthisarea(extendingsuppressioncoveragethroughoutthezoneandalternateshutdownvialocal'ORVcontrol),which'erereviewedandapprovedbythe,NRC.Fire-Area59containscablesforsafeshutdownof,D.C.CookUnit2.Shoulda'ireoccurinFireArea.'9,completealternateshutdowncapabilityisprovidedoutsideofthefireareausingUnit1equipment.FireProtectionEuimentAutomaticionizationdetectionsystemsareinstalledinFireZone52andFireArea59.Apreactionsprinklersystem,whichrequiresactuationofthepilotlinedetectorsystemtoallowwatertoenterthe;sprinklerpipingsystem,withheatthenrequiredtofuseindividualsprinklerheads,isprovidedinFireZone52.AnautomatictotalfloodingCO2suppressionsystemthatis-actuatedbythedetectionsystemisprovidedinFireArea'59.Page9-114 Manualsuppressioncapabilitiesintheform.ofportableextinguishersandhosestationsareavailableforuseinbothlocations.FireHazar'dsAnalsisThesteelplatehatchis.located,inthefloor/ceilingassemblyseparatingFireZone52onthe633ftelevationfromFireArea59onthe622ft-6in.elevation.ForafiretopropagatebetweenFireZone52andFireArea59,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherent.fire~protection,capabilitiesofthesteelplatehatch.Thefailurepointofexposedstructural.-steel'istakento-bewhenitsload-carryingcapabilityi's.reducedto60<of,i"tsyieldstrength.,Thislimit.normallyoccurswhenthetemperature=ofthesteelreaches1000F.UndertheASTME119StandardTime-,'.Temperaturecurve,anequivalentfire.severityof5-10minutesisrequiredtoachievethistemperature.Althoughthesteelplatehatchisnotaload-carryingstructuralcomponent,thefailurecriteriaofstructuralsteelcanbeappliedtothesteelplatehatch,toestablishaconservativebaseabovewhichfailurecould:bepostulated.Thefixedcombustibleloading;inFireZone52isunder,27,000Btu/ftforanequivalent.fireseverityofapproximately-20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare10,717Btu/ftand7.9minutesPage9-115 respectively.)FireZone52islocatedinafireareawithanaveragefixedcombustibleloadingofunder'33,000Btu/ftforanequivalentfireseverityofapproximately25minutes.(Theactualcombustibleloadingandequivalentfireseverity=existingatthistimeare17,283Btu/ftand12.9minutes,respectively.)Onthelevelonwhichthis'zoneislocated(madeupofFireZones49,50,51and52),theaveragefixedcombustibleloadingisunder47,000Btu/ftforanequivalentfireseverityofapproximately35minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistime're28,'629"Btu'/ftand21.4minutes,respectively.)'owever,theequivalentfireseverity,ofthose,zones,(FireZones49,50,51'and52)onthe633ftelevation-(35minutes)"wouldraisethetemperaturetoover1000Fifthefire'asnot.promptlydetected'andextinguished.An,automaticdrypilotpreacti'on.sprinklersystemisprovided-inF~ireZone52.Thiscombinationofautomaticionizationdetectionanddrypilotpreaction,sprinklersprovides'reasonableassurancethatafireinvolvingfixedcombustiblesinthefireareacontainingFireZone52wouldnotadverselyimpactonthecapabilityofthesteel,plate-hatchtoprotecttheopeninginthebarrier..The.existence,oftheautomaticdetectionandsuppressionsystemswilltend'tomitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.Page9-116 FireArea59hasafixedcombustibleloadingofunder67,000Btu/ftforanequivalentfireseverityofapproximately50minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare.54,237Btu/ftand40.7minutes,respectively.)Anequivalentfireseverityof50minutes.would,raise.thetemperatureofthesteelplate,hatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.AnautomatictotalfloodingCO2suppressionsystemactuatedbythede'tectionsystemisprovidedinFireAreaS9.ItThecombinationoj,.automaticdetectionandautomatictotalfloodingC02suppression,providesreasonableassurancethat,afireinvolvingfixedcombustibles,,would,not"adversely-;impactonthecapabilityofthesteelplate-hatchtoprotect'he.opening.inthebarrier.Theexistence.of.theautomatic>>detectionandsuppressionsystemswilltendto"mitigate-increasesin'hefixedcombustibleloadingor,thepresence-oftransientcombustibles;"providedthattheincreasesdonotexceedthecapabilitiesof=thesuppressionsystem.ConclusionBasedonthe'boveevaluation,reasonableassuranceis~providedthatafireinFireZone52orFireAreaS9wouldnot.impairsafeshutdowncapabilitiesofD.C.CookUnits1and2.In*addition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-117 Thebasesthatjustifytheconclusionaresummarizedasfollows:(1)(2)(3)Anequivalentfireseverityof5-10minutesisrequiredtoraisethetemperatureofload-carryingstructuralsteeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablishaconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.FireZone52hasanequivalentfireseverityof20minutes.ThecombinationoffirezonesmakingupthefireareainwhichFireZone52islocatedhasanaveragefireseverityof25minutes.Theaveragecombustibleloadingofthosefirezones"on'he"633't'levationthatareincludedinthefireareawithFireZone52is35minutes.(5)(6).TheautomaticionizationdetectionanddrypilotpreactionsprinklersystemsinstalledinFireZone52wouldresultindetectionandsuppressionofafireinvolvingfixedcombustiblesinitsincipientstages.Increasesinthe.fixedand/or,transientcombustibleloadingsinFireZone'52willbemitigatedbythe.,presence,of.automatic.suppression'systems,'providedthattheincreasesdonotexceedthecapabilitiesofthesuppression.,systems.FireArea59hasanequivalentfireseverityof50minutes;however,automaticdetectionandautomaticC02suppressionshouldresultindetectionandsuppressionofafireinvolvingfixedcombustiblesinFireArea59initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea59willbemitigatedbythepresenceofautomaticsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystems.Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.Page9-118 9.19FireArea45andFireArea60HatchEvaluationP~uruseThepurposeofthisevaluationistoanalyzethe<"impactofanunratedsteelplatehatchlocatedbetweentheUnit2EngineeringSafetySystemandMCCRoomandtheUnit2SwitchgearRoomCableVault(FireArea45andFireArea60,respectively)onredundantsafeshutdowncapability.Athree-hourfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthislocation.Inaddition,thisevaluationdoesnotadverselyimpact,onotherevaluations,orexemptionrequestscontainedinthisreport.-eFireArea45islocatedonthe609ft-6-in.'elevationoftheAuxiliaryBuilding.FireArea,60islocateddirectlyaboveFireArea45onthe625ft-10in..elevation.Thebarrier.separatingthetwoareasisconstructedofreinforcedconcretewithathree-hourfirerating;however,asteelplatehatchintheceilingofFireArea45providesaccessintotheCDBatteryRoomenclosureofFireArea60.SafeShutdownEuimentFireArea45andFireArea60containcablesandequipmentrequiredforsafeshutdownofD.C.CookUnit2.ShouldafireoccurineitherFireArea45orFireArea60,completealternateshutdowncapabilityoutsideofbothfireareasisprovidedusingUnit1equipment.0Page9-119 FireProtectionEuimentAutomatic.ionizationandinfrareddetectionsystemsareinstalledinFireArea45andFireArea60.TheCDBatteryRoomenclosureofFireArea60isprovidedonlywithionizationdetection.AnautomatictotalfloodingC02suppressionsystemisprovidedinFireArea45andFireArea60.AutomaticsuppressioncapabilityisnotprovidedintheCDBatteryRoomenclosure.ManualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinbothFireArea45andFireArea60,including'theCD'--Battery"Room'nclosure.F~ireHazardsAnalsis-,.The.steel.platehatchis.locatedinthefloor/ceilingassemblyseparatingFireArea45onthe609ft-6in.elevationandthe.CD..BatteryRoomenclosure,ofFireArea60onthe625ft-10in.elevation.ForafiretopropagatebetweenFireArea45andFireArea60,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherentfireprotectioncapabilitiesofthesteelplatehatch.Thefailurepointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60<ofitsyieldstrength.Thislimitnormallyoccurswhenthetemperatureofthesteelreaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfireseverityof5-10minutesisrequiredtoachievethistemperature.AlthoughthesteelplatePage9-120 hatchisnotaload-carryingstructuralcomponent,thefailurecriteriaofstructuralsteelcanbeappliedtothesteelplatehatchtoestablishaconservativebase.abovewhichfai'lure'couldbepostulated.FireArea45hasafixedcombustibleloadingofunder40000Btu/ftforanequivalentfire"severity.-ofapproximately30minutes.(Theacxtual..combustibleloadingandequivalent.fireseverityexistingatthistimeare23,443Btu/ftand17.6minutes,respectively.)Anequivalent4;ireseverityof30minuteswouldraisethetemperatureofthehatchtoover1000Fifthefirewasnotpromptlydetectedandextinguished.,An.automatictotal...floodingC02suppressionsystem-actuated-byionization""andinfrareddetectorsisprovidedin'ireArea"-45.,'he'combinationofautomaticdetectionandautomat.ictotalfloodingCO2;suppressionprovidesreasonableassurancethatafire.involvingfixedcombustiblesinFireArea45would..notadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomaticdetectionandsuppressionsystemswilltendtomitigateincreasesinthefixedcombustibleloading'orthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.FireArea60hasafixedcombustibleloadingofapproximately40,000Btu/ftforanequivalentfireseverityofPage9-121 approximately30minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare25,487Btu/ft2and-19minutes-,respectively.)Anequivalentfireseverityof30minuteswouldraisethetemperatureofthesteelplatehatchto-over1000Fifthefirewasnotpromptlydetectedandextinguished;Theonlycombustiblematerialsin'heCDBatteryRoomenclosurearethebatterycasings.TransientcombustiblesarenotpostulatedinFireArea60,includingtheCDBatteryRoom,basedoncontrolledaccessthroughoutthe"entir'e4kV"'"Ro'om'-'"complex.Maintenanceactivitieswouldrequireminimalamountsofc'ombustible,:materials.,Firewould'ave-.tospreadintothe1'nclosurefrom.theremainderofFireArea60inordertoignitethecasings;,An"'automatictotalfloodingC02suppressionsystem(which,does.riot'rotect'theCDBatteryRoom)actuatedbyionizationandinfrareddetectorsisprovidedinFireArea60.Thecombinationofautomaticdetectionand,automatictotalfloodingC02suppressionprovidesreasonableassurancethatafireinvolvingfixedcombustiblesinFireArea60wouldnotspreadintotheCD,'atteryRoomenclosure,ignitethebatterycasings,and.'adverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomatic,detectionandsuppressionsystemswilltendto-mitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.Page9-122 ConclusionBasedontheaboveevaluation,reasonable-assuranceisprovidedthatafireinFireArea45orFireArea60wouldnot'mpairsafeshutdowncapabilitiesofD.C.CookUnit2.Inaddition,thisevaluationdoesnot.adverselyimpactonotherevaluationorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusionaresummarizedas'.follows:(1)Anequivalentfireseverityof5-10minutesisrequiredtoraisethetemperatureofload-carryingstructuralsteeluptoitsfailurepointof1000F.(2)Thesteelplatehatchisnotaload-carryingstructural'~component;however,a5-10minutefireseveritycanbeusedto,establishaconservative.'ase-.abovewhichfailurecouldbepostulatedwithout.additionalfire.protection.(3)FireArea45hasan*equivalent.'fire.severityof30".minutes;however,automaticdetectionandautomaticC02suppressionshouldresultindetectionandsuppression~ofafireinFireArea45initsincipientstages.Increasesin'thefixedand/or.transientcombustible':loadingsinFireArea45wouldbemitigatedbythepresenceofautomaticsuppressionsystems,providedth'at"'the'ncreasesdonotexceedthecapabilitiesofthesuppressionsystems.(4)FireArea60hasanequivalentfireseverityof30minutes;however,automaticdetectionandautomaticC02suppression(exceptfortheCDBatteryRoom)should-.'esultindetectionandsuppressionofafireinFireArea60initsincipient'stages.Increasesinthefixedand/ortransientcombustibleloadingsinFireArea60(excludingtheCDBatteryRoom)wouldbemitigatedbythepresenceofautomaticsuppressionsystems,providedthattheincreasesdonotexceedthe'apabilitiesofthesuppressionsystems.Page9-123 (5)TheonlycombustiblematerialsintheBatteryRoomenclosurearethebatterycasings.FirewouldhavetospreadintotheenclosurefromtheremainderofFireArea60.(6)ShouldafireoccurineitherFireArea45orFireArea60,completealternatecapabilityisprovidedoutsideofbothfireareasusingUnit1equipment.(7)Replacingthesteelplatehatchwithoneoffire-ratedconstructionwould'otsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9.20FireZone47BandFireArea60HatchEvaluation~PuroseThepurposeofthisevaluationistoan'alyze'theimpa'ctofanunratedsteelplatehatchlocatedbetweentheUnit24kVSwitchgear.RoomandtheUnit2SwitchgearRoomCableVault(FireZone47B.and'FireArea60,respectively)onredundantsafeshut-downcapability..Athree-hourfire-rated,hatchassemblyisnotcommercially.availab'lefor"usein".thislocation.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.*FireZone47Bislocatedonthe609ft-6in.elevationoftheAuxiliaryBuilding.,ItispartofalargerfireareathatincludesFireZone'47A.=FireArea60islocateddirectlyaboveFireZone47Bonthe625ft-10in.elevation.Thebarrierseparatingthetwoareasisconstructedofreinforcedconcretewitha,three-hourfirerating;however,anunratedsteelplatehatchintheceilingofFireZone47BprovidesaccesstoFireArea60.Page9-124 SafeShutdownEuimentFireZone47BandFireArea60containcablesandequipmentrequiredforsafeshutdownofD.C.CookUnit2.Should.afireoccurineitherFireZone47BorFireArea60,completealternateshutdowncapabilityoutsideofthefireareaorzoneisprovidedusingUnit1equipment.FireProtectionEuimentAutomaticionizationandinfrareddetectionsystemsareinstalledinFireZone47BandFireArea60.AnautomatictotalfloodingCO2suppression.systemisprovidedinFireZone47B.AnautomatictotalfloodingC02,suppressionsystemisalsoprovidedinFireArea60,exceptthatcoverage.doesnotextend'.into-theCDBatteryRoom.(Thehatchisnotlocatedin'the.CDBatteryRoom.)Manualsuppressioncapabilitiesin.theform.'of.'portableCextinguishersandhosestations"are"=.,available,<<foruseinboth'-.FireZone47BandFireArea60.FireHazardsAnalsisAThesteelplatehatchislocatedinthefloor/ceilingassemblyseparatingFireZone47Bonthe609ft-6in.elevationfromFireArea60onthe625ft-10in.elevation.Forafireto'ropagatebetweenFireZone47B=andFire.Area60,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherentfireprot,ectioncapabilitiesofthesteelplatehatch.Page9-125 Thefailurepointofexposedstructuralsteelistakentobewhenitsload-carryingcapabilityisreducedto60%ofitsyieldstrength.This,limitnormallyoccurswhenthetemperature-ofthesteelreaches1000F.UndertheASTMK119StandardTime-'pemperaturecurve,anequivalentfireseverityof5-10minutesisr-.equiredtoachieve'thistemperature.Althoughthe'steelplateh'atchisnot,aload-carryingstructuralcomponent,thefailurecriteriaofstructuralsteelcanbeappliedtothesteelplatehatchtoestablishaconservativebaseabovewhichfailurecouldb'epostulated.FireZone47Bhasa'ixedcombustibleloadingofunder3g,000-Btu/ft...'foranequivalentsfireseverityof'approximately2.,25minutes.;.(The.actualcombustibleloading"andequivalentfireseverity,existing;at,.thistimeare17,136Btu/ftand12.9m'inutes,'.respectively.~Anequivalent.fireseverity'of25minuteswouldraisethetemperature'ofthehatchtoover1000Fifthef'irewasnotpromptlydetectedandextingui'shed.AnautomatictotalfloodingCO2suppressionsystemactuatedbyionizationandinfrareddetectorsisprovidedinFireZone47B.ThecombinationofautomaticdetectionandautomatictotalfloodingCO2suppression-providesreasonable.assurancethatafireinvolvingfi'xedand/ortransientcombustiblesinFireZone47Bwouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.TheexistenceoftheautomaticdetectionandsuppressionsystemswilltendtomitigatePage9-126 increasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreases-donotexceedthecapabilitiesofthesuppressionsystem.FireArea60hasafixedcombustibleloadingofapproximately40,000Btu/ftforanequivalentfireseverityofapproximately30minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare25,487Btu/ftand19minutes,respectively.)Anequivalentfireseverityof30minuteswouldraisethetemperatureofthesteelplatehatchtoover.1000oFifthefirewasnotpromptlydetectedandextinguished.An.automatictotalfloodingC02suppressionsystem(vhichdoesnotprotect,the,CDBatteryRoom)=actuatedbyionizationandinfrareddetectorsis~providedin-Fire,Area60:Thecombinationofautomaticdetectionand.automatictotalfloodingC02suppression.providesreasonableassurancethatafireinvolvingfixedand/ortransientcombustiblesinFireArea60wouldnotadverselyimpactonthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.Theexistenceoftheautomaticdetectionandsuppressionsystemsvilltendtomitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireinFireZone47BorFireArea60wouldnotPage9-127 impairsafeshutdowncapabilitiesofD.C.CookUnit2.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusionaresummarizedasfollows:(1)(2)(3)An-equivalentfire'severityof5-10minutesisrequiredtoraisethetemperatureofload-carryingstructuralsteeluptoitsfailurepointof1000F.Thesteelplatehatchisnotaload-carryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablishaconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.FireZone47Bhasanequivalentfireseverityof25minutes;however,automaticdetectionandautomaticC02suppressionwouldresultin-detectionandsuppressionofafireinFireZone47Binitsincipientstages.Increases-inthefixedand/ortransientcombustibleloadingwouldbemitigatedbythepresenceofautomaticdetection.andsuppressionsystemsinFireZone478,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.n4(4)(5)'(6)FireArea60.hasanequivalentfireseverityof30minutes;however,automaticdetectionandautomaticC02suppression(exceptfortheCDBatteryRoom)wouldresultindetectionandsuppressionofafireinFireArea60initsincipientstages.Increasesinthefixedand/ortransientcombustibleloadingswouldbemitigatedbythepresenceofautomaticdetectionandsuppressionsystemsinFireArea60(excludingtheCDBatteryRoom),providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystems.ShouldafireoccurineitherFireZone47BorFireArea60,completealternatecapabilityisprovidedoutsideofthefireareaorzoneusingUnit1equipment.Replacingthesteelplatehatchwithoneoffire-ratedconstructionwouldnotsigni'ficantlyenhancetheprotectionprovidedbytheexistingconfiguration.Page9-128 9.21FireZone110andFireZone43DoorEvaluation~PuruseThepurposeofthisevaluationistoanalyzetheimpactofthreeunrateddoorassemblieslocated,betweentheUnit1MainSteamAccesswayandtheAccessControl.Area(Fire,Zone110'nd~FireZone43,respectively)onredundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZone110ispartofalarger.;,fire.,'area'thatalso:includesFireZone108andtheentiretyoftheTurbine-Building&,eFireZone110originateson'he587ftelevationandisconnectedtotheTurbineBuildingthroughanunrateddooronthis.elevation'ndbysteamlineopenings'onthe609ftelevation..FireZone110risesupthroughthe609ftelevationalongtheeastandwestPwallsofFireZone43,withtheportionalongtheeastwalljoiningFireZone108onthe633ftelevationandtheportionalongthewestwallterminatingbelowthe633ftelevation.The+,portionofFireZone110alongthewestwallofFireZone43isopentoFireZone91intheTurbineftelevationsforsteampipeaccessBuildingfromthe620to631-totheturbines.FireZone43ispartofalargerfireareathatincludesFireZones37,.Page9-129 44S,and44Nand44Athrough44H,allofwhicharelocatedonthe609.ftelevationoftheAuxiliaryBuilding.Theeastwallof,.FireZone43isseparatedfromFireZone110bythree-hour-ratedconstruction.ThewestwallofFireZone43isseparatedfromFireZone110by,three-hour-ratedconstruction;however,threeunrateddoorassembl,iesofhollowmetalconstructionprovideaccessintoFireZone,110,fromtheRadiationControlOfficeinFireZone43.SafeShutdownEuimentFireZone110doesnotcontainsafeshutdown-'equi'pment"orcables.FireZone..108,,which~ispartofthesamefire'area,contains.,cables,.valves,andinstrumentationassociatedwithsafeshutdown.ofD.C.CookUnit'1usingSteamGenerators2.and3.GivenafireinFire~.Zones108'*or110;redundantsafeshutdown,capability's.',provided,using-valves'ndinstrumentationassociatedwith.Unitl.Steam.Generators1'and4locatedinFireZones33and33A,which,are.partofa,separate;.~fire.area.FireZone43containscablesassociatedwithsafeshutdownofD.C.CookUnit1.AlternateshutdowncapabilityisprovidedoutsideofthisfirezoneusingUnit'equipmentandeitherUnit1SteamGenerators2and--3'rUnit1SteamGenerators1and4.Thecables,valvesandinstrumentationlocatedinFireZone108arenotrequiredto'ensuresafeshutdowncapabilitygivenafireinFireZone43,asalternateshutdowncapabilityisprovidedinFireZones33and33A.Page9-130 FireProtectionEuimentAnautomaticionizationdetectionsystem-is.installedbelowthesuspendedceilinginFireZone'3,withonedetectorprovidedintheRadiationControlOfficethatabutsFireZone110.FireZone43isnotprotectedbyautomaticsuppression.Automaticdetectionandautomatic.suppressionare-not.provided"inFireZone110.Manualsuppressioncapabilitiesin-theformofportable'xtinguishersandhose,stationsareavailableforuseinbothzones.FireHazardsAnalsix;,Fire.Zone43hasafixedcombustibleloadingofunder80,000Btu/ftforanequivalentfireseverity:of.-60'minutes.'-(The'ctualcombustibleloadingandequivalentfireseverity'existing'tthistimeareunder74,361Btu/ftand55.8-respectively.)Transientcombustiblesinthisfirezonearelimitedto'aterials'eing.broughtintothe"Auxiliary'uilding.FireZone43isthe'ccesscontrolareatotheAuxiliaryBuildingand,assuch,isnormallymanned;however,duringsomebackshiftperiodswithreducedmanning,RPdutiesmayrequirethezonetobeunoccupied.'utomaticdetectionisprovidedinthiszone,withonedetector,-locatedintheRadiationControlOffice.-Thethreeunrateddoors'oFireZone110arelocatedinthisofficeandarenoteasily"accessibleduetofilecabinets,beingplacedupagainstthem.Thecombinationoflowfireloading,automaticdetection,andnormalmanningofthefirezoneprovidesreasonableassurancePage9-131 thatfirewillbequicklydiscoveredandextinguished.Assuch,thedoorsprovideadequateprotectionbarrier.fortheopeninginthe0FireZone110hasafixedcombustibleloadingofunder27,000Btu/ftandequivalentfireseveritylessthan20minutes.(!Theactualcombustibleloadingand,equivalentfireseverityexistingatthistimeare803Btu/ftand0.6minutes,respectively.)Tiansientcombustiblesintheformofwoodandoxy-acetylenecylindersaresometimesstoredonthe587ftelevationofFireZone110.Thecombustible'-loading"'and"equivalentfire.severityinFireZone.110duetotransientcombustibles.areunder.,40,000:Btu/ftand30minutes,r>espectively.-.Thebottomofthe.threeunrateddoorsarelocatedapproximately22ftabove,thefloorofthiszonein'verticalshaft*along.th'e',-eastwall.of'theshaftandthewestwallofFireZone43.Based~upon.theirlocation,thedoorswouldnotbedirectlyexposedto,fire..Inordertoimpact-,.onthedoors,heatandhotgaseswouldhavetoriseuptheshafttobelowthe633ftelevationandbankdowntothelevelofthedoors.MainsteampipingpenetrationsexistinthewestwallofFireZone110connectingitwithFireZone91oftheturbineBuilding.HeatandhotgasesrisinguptheshaftwouldtendtospilloutintotheTurbineBuildingandnotbankdowntheshafttothelevelofthedoors.BasedontheamountoffixedcombustiblesandthePage9-132 anticipatedamountoftransientcombustibles,reasonableassuranceisprovidedthatafireinFireZone"110wouldnotadverselyimpactonthe.capability'ofthedoorstoprotecttheopeningsinthebarrier.ConclusionBasedontheaboveevaluation,reasonableassurance'isprovidedthatafire,inFire.Zone43orFireZone110wouldnot;impairthesafeshutdowncapabilitiesofD.C.CookUnitl.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationorexemptionrequestscontainedinthisreport.Thebasesthatjustifythe.conclusion.aresummarizedasfollows:(2)(3)FireZone43has-,.anequivalent-.fireseverity"ofunder-60minutes.~1~IPireZone43istheaccess.control.areaandisnormallymanned..Transient.combustiblesarelimitedtomaterialsbeingbroughtintotheAuxiliaryBuilding.PireZone43isprovidedwithanautomaticdetectionsystem,withonedetectorintheRadiationControlOfficethatabutsFireZone110.(4)(5)(6)FireZone1/0hasfixedcombustibleloadingunder27,000Btu/ft(combustibleloadingexistingatthistimeisnegligible).Transientcombustibles,intheformofwoodandoxy-acetylenecylinders,wouldbelocatedonthe587ftelevationofFireZone110withacombustibleloadingandequivalentfireseverityofunder40,000Btu/ftandlessthan30minutes,respectively.Thebottomofthedoorsarelocatedinaverticalshaftapproximately22ftabovethefloorofFireZone110.Page9-133 Inordertoimpactontheunratedhollowmetaldoors,heatandhotgasesfromafireinFireZone110wouldhavetoriseuptothetopoftheshaft(atapproximatelythe633ftelevation)andbankdowntothelevelofthedoors.(8)Mainsteam.-lineopeningsfromFireZone110toFireZone91oftheTurbineBuildingbetweenthe620and631ftelevationsallowproductsofcombustiontospilloutintotheTurbineBuildingasopposedtobankingdowntothelevelofthedoors.etc,(9)GivenafireinFireZones108or110,redundan'tsafeshutdowncapabilityisprovidedinFireZones33and33A,whicharelocatedinaseparatefirearea.(10)GivenafireinFireZone43,redundantsafeshutdowncapabilityisprovidedusingeitherUnit1steamgenerators"2and3(withcables'alves,"and'nstrumentationlocatedinFireZone108)orUnit1steamgenerators'and4(withcables,valves,andinstrumentationlocatedinFireZones33and33A).e(ll)Replacing:theunratedhollowmetaldoorswithratedfire.door~assembliesPwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9>".22FireZoneill:andFireZone44SDoorEvaluation'p.ureeThepurposeofthis.evaluationis.toanalyzetheimpactofthreeunrateddoorassemblieslocatedbetweentheUnit2MainSteamAccesswayandthesouthendofthe609ftelevationoftheAuxiliaryBuilding(FireZoneillandFireZone44S,respectively)'on,redundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-134 DescritionFireZoneillispartofalargerfireareathatalsoincludesFireZone109andtheentiretyoftheTurbineBuilding'.FireZoneilloriginatesonthe587ftelevationandisconnectedtotheTurbineBuildingthroughanunrateddooronthiselevationandbysteamlineopeningsonthe609ftelevation.'ireZone111risesupthroughthe609ftelevationalongtheeastandwestwallsofFireZone44S,withtheportionalongtheeastwalljoiningFireZone109onthe633ftelevationandtheportionalongthewestwall+terminatingbelowthe633ftelevation.TheportionofFireZoneillalongthewestwallofFireZone44Sis'pentoFireZone96in-theTurbineBuildingfromthe-620to631ft,elevationsforsteampipeaccesstotheturbines."'.FireZone44SispartofalargerfireareathatincludesFireZones37,44S,and44Nand44Athrough44H,allofwhicharelocatedonthe.",609ftelevationoftheAuxiliaryBuilding.ThewestwallofFireZone44Sis.separatedfromFireZoneillbythree-hour-ratedconstruction;however,threeunrateddoorassembliesofhollowmetalconstructionthatarepadlockedshutprovideaccessintoFireZoneillfromFireZone44Sdirectlywestofthecomponentcoolingwater(CCW)pumps.SafeShutdownKuimentFireZoneilldoesnotcontainsafeshutdownequipmentorcables.FireZone109,whichispartofthesamefirearea,containscables,valves,andinstrumentationassociatedwithsafePage9-135 shutdownofD.C.CookUnit2usingsteamgenerators2and3.Givenafire'inFireZones109orill,redundantsafeshutdowncapabilityisprovidedusingvalvesandinstrumentationassociatedwithUnit2steamgenerators1and4locatedinFireZones34and34A,whicharepartofaseparatefirearea.FireZone44Scontains.cablesandequipmentassociatedwithsafeshutdownofD.C.CookUnits1and2.Athree-hourbarrierhasbeenprovidedbetweentheUnit1andUnit2CCWpumpstoensureavailabilityofoneunit'spumpsgivenafireinthevicinityoftheCCWpumps.Alternateshutdown'apabi"1'ity'isprovidedoutsideofthisfirezoneusingUnit1equipmentandeither.Unit2.steamgenerators2and3orUnit2steamgenerators.1"'.and4.Thecables,"valvesandinstrumentationlocatedinFireZone109are,notrequiredtoensuresafeshutdowncapabilitygiven:afireinFireZone'.44S,asalternateshutdowncapabilityisprovidedinFireZones34and34A.FireProtectionEuimentAutomaticdetectionandautomaticsuppressionarenotprovidedin,FireZoneill.FireZone44Sisprovidedwithanionizationdetectionsystem.Adrypilotpreactionsprinkler/systemisinstalled.in.FireZone44S.Thispilot-actuatedsprinklersystemisextendeddirectlyovertheCCWpumpstosprayagainsttheCCWpumpbearings.Manualsuppressioncapabilitiesintheform.ofportableextinguishersandhosestationsareavailableforuseinbothzones.Page9-136 FireHazardsAnalsisFireZone44Shasafixedcombustibleloadingofunder33,000Btu/ftforanequivalentfireseverityofapproximately25minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare19,192Btu/ftand14.22minutes,respectively.)Anionizationdetectionsystemandadrypilotpreactionsprinklersystemarelocatedinthiszone.EnhancedprotectionisprovidedovertheCCWpumpsfromthispilot-actuatedsprinklersystemtosprayagainstthepumpbearings.Thecombi.nationofautomaticdetectionandthepilot-actuatedsprinklersystemcoveringthezoneandtheCCWpumpbearingsensureearlydetectionandsuppressionofafireinthezone.Thisprovidesreasonableassurancethatthethreeunratedhollow-metaldoorsadequatelyprotecttheopeningsinthebarriertoFireZoneill.Theexistenceoftheautomaticdetectionandsuppressionsystemswilltendtomitigateincreasesinthefixedcombustibleloadingorthepresenceoftransientcombustibles,'rovidedthattheincreases"donotexceedthecapabilitiesofthesuppressionsystem.FireZone111hasafixedcombustibleloadingofunder27,000Btu/ftandequivalentfireseveritylessthan20minutesI(theactualcombustibleloadingandequivalentfireseverityexisting.atthi'stimeare838Btu/ftand0.6minutes,respectively.)Transientcombustibles'ntheformofwoodandoxy-acetylenecylindersaresometimesstoredonthe587ftPage9-137 elevationofFireZoneill.ThecombustibleloadingandequivalentfireseverityinFireZone111duetotransientcombustiblesareunder40,000Btu/ftandlessthan30minutes,respectively.Thebottomof.thethreeunrateddoorsarelocatedapproximately22ftabovethefloorofthiszoneinaverticalshaftalongtheeastwallofFireZoneillandwestofFireZone44S.Basedupontheirlocation,thedoorswouldnotbedirectlyexposedtofire.Inordertoimpactonthedoors,heatandhotgaseswouldhave'oriseuptheshafttobelowthe633ftelevationandbankdowntothelevelofthedoors.Mainsteam'pipingpenetrationsexistinthewestwallofFireZoneill'connectingitwithFireZone96ofthe.TurbineBuilding.Heatandhotgasesrisi'nguptheshaftwould.tendtospilloutintotheTurbineBuildingandnotbankdowntheshafttothelevelof'thedoors.Basedontheamountoffixedcombustiblesandtheanticipatedamountoftransientcombustibles,reasonableassuranceisprovidedthatafireinFire,Zoneillwouldnotadverselyimpactonthecapabilityofthedoorstoprotecttheopeningsinthebarrier.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafire.inFireZone44SorFireZoneillwouldnotimpairthesafeshutdowncapabilitiesofD.C.CookUnits1or2.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-138 Thebasesthatjustifytheconclusionaresummarizedasfollows:(1)-FireZone44Shasanequivalentfireseverityof25minutes.(2)(3)(4)(5)(7)(8)A'utomaticdetectionanddrypilotpreactionsprinklersareprovidedinthiszone.Enhanced,protectionisprovidedovertheCCWpumpsfromthepilot-actuatedsuppressionsystemthatsprayswaterontheCCWpumpbearings.Increasesinthefixedand/ortransientcombustibleloadingsinFireZone44Swouldbemitigatedbythepresenceoftheautomaticdetectionandsuppressionsystems,providedthattheincreasesdonotexceedthecapabilitiesofthesuppressionsystem.FireZoneill'asafixedcombustibleloadingunder27,000Btu/ft(Theactual,combustibleloadingexistingatthistimeisnegligible.)'ransientcombustiblesintheformofwoodandoxy-acetylenecylinderswouldbelocatedon.the587ftelevationofFireZoneill'ithacombustibleloadingandequivalentfireseverityofunder40,000Btu/ft~andlessthan30minutes,respectively."Thebottomofthedoorsarelocatedinaverticalshaftapproximately22ftabovethefloorofFireZone111.Inordertoimpactontheunratedhollowmetaldoors,heatandhotgasesfromafireinFireZoneillwouldhavetoriseuptothetopoftheshaft(atapproximatelythe633ftelevation)andbankdowntothelevelofthedoors.(9)MainsteamlineopeningsfromFireZoneilltoFireZone96oftheTurbineBuildingbetweenthe620and631ftelevationsallowproductsofcombustiontospilloutintotheTurbineBuildingasopposed,tobankingdowntothelevelofthedoors.(10)GivenafireinFireZones109orill,redundantsafeshutdowncapabilityisprovidedinFireZones34and34A,whicharelocatedinaseparatefirearea.Page9-139 (11)GivenafireinFireZone44S,redundantsafeshutdowncapabilityisprovidedusingeitherUnit2SteamGenerators2and3(withassociatedcables,valves,andinstrumentationlocatedinFireZone109)orUnit2SteamGenerators1and4(withassociatedcables,valves,andinstrumentationlocatedinFireZones34and34A).(12)Replacingtheunratedhollowmetaldoorswithratedfiredoorassemblieswouldnotsignificantlyenhanceprotectionprovidedbytheexistingconfiguration.9.23FireArea116BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactoftwomanwayopeningsconnectingFireArea116withadjacentfireareasonredundantsafeshutdowncapability.Inaddition,thisevaluationdoes-notadverselyimpactonotherevaluationsorfexemptionrequestscontainedinthisreport.SqFireArea116'isapipetunnellocatedentirelybelowgradelIthattravelsfromtheeastsideofUnit1ContainmenttothewestsideofUnit1Containment.FireArea116isatthe593ftelevationalongtheeastandnorthsidesofUnit1Containment.Ontheeastside,itisaccessedbyaladderopeninginthefloorofFireZone33atthe612ftelevation.Alongthewestsideandv'ora.shortdistanceonthenorthsideofUnit1Containment,FireArea116isat.the586ftelevation.AccessdownintothetrenchonthewestsideisfromaladderinFireArea12atthetPage9-140 591ftelevation.ThetrenchopensdirectlytoFireArea116alongthenorthwallofFireArea12.Adistanceinexcessof250ftseparatestheopeningsfromFireArea116toFireArea12andFireZone33.SafeShutdownEuimentFireArea116containsnosafeshutdownequipment.FireZone33containsthefollowingvalvesandassociatedcablingforSteamGenerators1and4:oSafetyvalvesoAFWfeedregulationvalvesoPressuretransmittersoMSIVsoPORVsoLSIpanelFireZone12containsthefollowingvalvesandassociatedcablingforSteamGenerators2and3:oAFW.feedregulationvalvesoContainmentsumptoRHRpumpsuctionvalveoLSIpanelShouldafireinvolveb'othFireZone33andFireArea12,thepotentialexiststolosepowertocontrolthepositionoftheAFWfeedregulationvalvesforallfoursteamgenerators.However,thevalvesarenormallycablestothesevalves,theyfailopen.Shouldfiredamagetheasis,whichisintheopenposition.Page9-.,141 FireProtectionEuimentAutomaticsuppressionandautomaticdetectionarenotprovidedinFireArea116orFireArea12.AutomaticdetectionwasproposedforthefireareacontainingFireZone33intheMarch1983AppendixRSubmittaltosupportthefixedareasuppressionexemptionrequestforalternateshutdown.ManualsuppressioncapabilitiesintheformofportableextinguishersareavailableforuseintheselocationswithhosestationalsoavailableforuseinFireZones33A,33BandFireArea12.TwohosestationsarecurrentlybeinginstalledinFireArea12.FireHazardsAnalsisFireArea116hasafixedcombustibleloadingandresultingequivalentfireseverityofunder13,000Btu/ftand10minutesrespectively.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare437Btu/ftand0.2minutes,respectively.)TransientcombustiblesarenotpostulatedinthisareaasitisaradiationareawithaccesscontrolledbyHealthPhysics,andaccesstotheareaisvialadders.Maintenanceactivitiesareminimalinthisarea,,anditisnotanormalaccessroutetoanyotherplantlocations.ReasonableassuranceisprovidedthatafireinFireArea116wouldnotpropagateoutintoeitherFireZone33orFireArea12.Therefore,thetwomanwayopeningsdonotadverselyimpactonthecapabilitiesoftheboundariesofFireArea116.Page9-142 FireArea12hasafixedcombustibleloadingofunder20,000Btu/ftforanequivalentfireseverityofunder15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare1,722Btu/ftand1.2minutes,respectively.)Maintenanceactivitiesareminimalinthisarea,anditisnotanormaltravelroutetoanyotherplant,locations.Assuch,minimaltransientcombustiblesarepostulatedinFire~Area12.Shouldafireoccurinthisarea,theproductsofcombustionwouldtendtorisetoceilinglevel.AsthemanwayopeningtoFireArea116isaccessedviaaladdertoatrench/belowthenormalfloor'levelofFireArea12,reasonableassuranceisprovidedthatafireinFireArea12wouldnotpropagateoutintoFireArea,116.Therefore,-themanwayopeningfromthetrenchthatconnectsFireArea116andFireArea12doesnotadverselyimpactonthecapabilitiesofthebarrierseparatingthetwoareas.FireZone33ispartofafireareathatalsocontainsFireZones33A,33Band105.Theaveragefixedcombustibleloadinginthefireareaisunder27,000Btu/ft-foranequivalentfireseverityofunder20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeareunder11,530Btu/ftandlessthan8.5minutes,respectively.)Tran-sientcombustiblesarepostulatedinFireZone33AasitprovidesPage9-143 accesstoboththeUnit1ContainmentandtheContractorsAccessControlArea(FireZone122andFireArea105,respectively)andFireZone33.FireZone33Aisahighceilingarea.Assuch,productsofcombustionfromfireoccurringinthiszonewouldtendtorisetoceilinglevel.TheseproductsofcombustioncouldpropagateintoFireZone33throughthewalkway.openingandunsealedpipingpenetrations.Thiswould,however,have,minimalimpactontheladderopeningtoFireArea116asFireZone33isahighceilingarea,andtheladderopeningislocatedinthefloorofFi.reZone33.Reasonableassuranceisprovidedthatafireinthefire'areacontainingFireZone33wouldnotpropagatedownintoFire-Area116throughtheladderopening.Therefore,theladder.<openingthatconnects'ireZone33andFireArea116doesnot~adverselyimpactonthecapabilitiesofthebarrierseparating.thetwo.WhileFireArea116couldbecombinedwitheitherFireArea12orFireZone33,itismaintainedasaseparatefireareaforthepurposesofthisevaluation.ConclusionBasedontheaboveevaluation,-reasonableassuranceisprovidedthatthetwomanwayopeningsconnectingFireArea116withFireArea12andFireZone33donotimpairredundantsafeshutdowncapability.In'ddition,thisevaluationdoesnotadverselyimpactorotherevaluationsorexemptionrequestscontainedinthisreport.Page9-144 Thebasesthatjustifythisconclusionaresummarizedasfollows:FireArea116hasacombustibleloadingoflessthan13,000Btu/ftforanequivalentfireseverityof10minutes.(2)(3)(4)(5)(6)(7)ThecombustibleloadinginFireArea12isunder20,000Btu/ftforafireseverityoflessthan15minutes.ThefireareacontainingFireZone33hasanequivalentfireseverityofunder20minutes.FiresoccurringinthefireareacontainingFireZone33wouldtendtorisetoceilinglevels.TheaccessopeningtoFireArea116fromFireArea12isbelow"thenormalfloorlevelofFireArea12;theaccessopeningtoFireArea116fromFireZone33isviaaladderopeninginthefloorofFireZone33.Adistanceinexcessof250ftseparatesthemanwayopening'onnectingFireArea12andFireZone33withFireArea116.ShouldafirepropagatebetweenFireArea12andFireZone33throughFireArea116,therewouldbenoimpact'onsafeshutdowncapabilityastheAFWfeed'regulationvalvesallfailasis,whichisintheopenposition.ProtectingthemanwayopeningstoFireArea116fromFireArea12andFireZone33withfireratedmaterialwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9.24FireArea117BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactoftwomanwayopeningsconnectFireArea117withadjacentfireareasonredundantsafeshutdowncapability.Inaddition,thisPage9-145 evaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireArea117isapipetunnellocatedentirelybelowgradethattravelsfromtheeastsideofUnit2Containmenttothewest.sideofUnit2Containment.FireArea117isatthe593ft.-elevationalongtheeastandsouthsidesofUnit2Containment.Ontheeastside,itisaccessedbyaladderopeninginthefloorofFireZone34atthe612ft.elevation.AlongthewestsideandforashortdistanceonthesouthsideofUnit2Containment,FireArea117isatthe586ftelevation.Accessdownintothe.trenchonthewestsideisfromaladderinFireArea22atthex591ftelevation.ThetrenchopensdirectlytoFire'rea117F-'longthesouthwallofFireArea22.Adistanceinexcessof~250ftseparatestheopeningsfromFireArea117toFireArea22~andFireZone34.SafeShutdownEuimentFireArea117containsnosafeshutdownequipment.FireZone'34containsthefollowingvalvesandassociatedcablingforsteamgenerators1and4:oSafetyvalvesoAFWfeedregulationvalvesoPressuretransmittersoMSIVsoPORVsoLSIpanelPage9-146 FireZone22containsthevalvesandassociatedcablingforsteamgenerators2and3:oAFWfeedregulationvalvesoContainmentsumptoRHRpumpsuctionvalveoLSIpanelShouldafireinvolvebothFireZone34andFireArea22,thepotentialexiststolosepowertocontrolthepositionoftheAFWfeedregulationvalvesforallfoursteamgenerators.However,thevalvesarenormallyopen.Shouldfiredamagethecablestotheseva1ves,~theyfailasis,whichisintheopenpo'sition.FireProtectionEuimentAutomatic.suppressionandautomaticdetectionarenotprovidedinFireArea117orFireArea22.Automaticdetectionwasproposedforthefireareacontaining,Fire.Zone34intheMarch1983AppendixRsubmittaltosupport'hefixedareasuppressionexemptionrequestforalternateshutdown.Manualsuppressioncapabilitiesintheformofportableextinguishersareavailableforuseintheselocations,withhosestationsalsoavailableforuseinFireZone34A,34BandFireArea22.TwohosestationsarecurrentlybeinginstalledinFireArea22.FireHazardsAnalsisFireArea117hasafixedcombustibleloadingofunder13,000Btu/ftwithare'sultantequivalentfireseverityoflessthan10minutes.(TheactualcombustibleloadingandequivalentPage9-147 fireseverityexistingatthistimeare515Btu/ftand0.4,minutes,respectively.)Transientcombustiblearenotpostulatedinthisareaasitisa-radiationareawithaccesscontrolledbyHealthPhysics,andaccesstotheareaisvialadders.Maintenanceactivitiesareminimalinthisarea,anditisnota:.'normalaccessroutetoanyotherplantlocations.Reasonable'assuranceisprovidedthatafireinFireArea117wouldnotpropagateoutintoeitherFireZone34orFireArea22.Therefore,thetwomanwayopeningsdonotadverselyimpactonthecapabilitiesoftheboundariesofFireArea117.FireArea22hasacombustibleloadingofunder13,000'.Btu/ftforanequivalentfireseverityofunder10minutes.<'(Theactual'combustibleloadingandequivalentfireseverity.,existingatthistimeare1,022Btu/ftand0.6,minutes".";respectively.)-Maintenanceactivitiesareminimalinthisarea,.,anditis'notanormaltravel-routetoanyotherplantlocations.Assuch,minimaltransientcombustiblesarepostulatedinFireArea22.Shouldafireoccurinthisarea,theproductsofcombustionwouldtendtorisetoceilinglevel.AsthemanwayopeningtoFireArea117isaccessedviaaladdertoatrench.belowthenormalfloorlevelofFireArea22,reasonable~assuranceisprovidedthatafireinFireArea22wouldnotPage9-148 propagateoutintoFireArea117.Therefore,themanwayopeningfromthetrenchthatconnectsFireArea117andFireArea22doesnotadverselyimpactonthecapabilitiesofthe.barrierseparatingthetwoareas.FireZone34ispartofafireareathatalsocontainsFireZones34Aand34B.Theaveragefixedcombustibleloadinginthefireareaisunder20,000Btu/ftforanequivalentfireseverity.ofunder15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeareunder5,909Btu/ftandlessthan5minutes,respectively.)TransientcombustiblesarepostulatedinFireZone34AasitprovidesaccesstobothFireZone34andUnit2Containment.FireArea34Aisahighceilingarea..Assuch,.products,ofcombustionfromfiresoccurringinthiszonewouldtendtorisetoceilinglevel.TheseproductsofcombustioncouldpropagateintoFireZone34throughthewalkwayopening.andunsealedpipingpenetrations.Thiswould,however,haveminimalimpactontheladderopeningtoFireArea117asFireZone34isalsoahighceilingarea,andtheladderopeningislocatedinthefloorofFireZone34.ReasonableassurancethefireareacontainingFireZoneisprovidedthatafirein34wouldnotpropagatedownintoFireArea117throughtheladderopening.Therefore,theladderopeningthatconnectsFireZone34andFireArea117doesnoadverselyimpactonthecapabilitiesofthebarrierseparatingPage9-149

'hetwo.WhileFireArea117couldbecombinedwitheitherFireArea22orFireZone34,itismaintainedasaseparatefireareaII.forthepurposesofthisevaluation.ConclusionBasedontheaboveevaluation,reasonableassuranceispro'videdthatthetwomanwayopeningsconnectingFireArea117'withFireArea22andFireshutdowncapability.InZone34donotimpairredundantsafeaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifythisconclusionaresummarizedas,.follows:(1)FireA~ea117hasacombustibleloadingofunder13,000Btu/ftforanequivalentfireseverityofunder10minutes.(2)(3)(4)ThecombustibleloadinginFireArea22isunder13,000Btu/ftforanequivalentfireseverityoflessthan10minutes.ThefireareacontainingFireZone34hasanequivalentfireseverityofunder15minutes.=FiresoccurringinthefireareacontainingFireZone34wouldtendtorisetoceilinglevels.(5)TheaccessopeningtoFireAreaisbelowthenormalfloorlevelaccessopeningtoFireArea117viaaladderopeninginthefloor117.fromFireArea22ofFireArea22;thefromFireZone34isofFireZone34.(6)Adistanceinexcessof250ft'eparatesthemanwayopeningsconnectingFireArea22andFireZone34throughFireArea117.P'age9-1'50 (7)ShouldafirepropagatebetweenFireArea22andFireZone34throughFireArea117,therewouldbenoimpactonsafeshutdowncapabilityastheAFWfeedregulationvalvesallfailasis,whichisintheopenposition.(8)ProtectingthemanwayopeningstoFireArea117fromFireArea22andFireZone34withfireratedmaterialwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.9.25EssentialServiceWaterPumHouseHatchandFareDamerEvaluation~PuruseThepurposeofthis'valuationistoanalyzetheimpactof:(1)anunratedsteelplatehatchlocatedbetweentheceilingoftheCirculatingWaterPumpMotorControlRoom,FireZone29G,andthefloorofUnit2ESWPumpCubicle,FireZone29C(athree-hourIfire-ratedhatchassemblyisnotcommerciallyavailableforuseinthis.location);(2)undamperedventilationductslocatedintheceilingofFireZones29A,29B,29Cand29D;and(3)screenmeshaccessgatesintotheUnit1andUnit2ESWpumpcubiclesonredundantsafeshutdowncapabilityorthefullareasuppressionexemptionrequestsintheEssentialServiceWater(ESW)PumpHouse.1naddition,thisevaluationdoesnotaQverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.DescritionFireZone29GislocateddirectlybelowtheUnit1EssentialServiceWater(ESW)PumpCubicles(FireZones29Aand29B),andtheUnit2ESWPumpCubicles(FireZones29Cand29D).FireZones29Aand29BareseparatedfromFireZones29Cand29DbyaPage9-151 three-hour-ratedbarrier.UndamperedHVACsupplyairopeningsexistintheceilingofallfourfirezones,withunsealedpipingpenetrationsthroughtheceilingoftheUnit1cubiclesandsealedpenetrationsthrough.theceilingoftheUnit2cubicles.AnopenwalkwayconnectsFireZone29Aand-FireZone29BofUnit1,while.asimilarwalk~ayconnectsFireZone29CandFireZone29D.AnopencurbedstairwayfromFireZone298providesaccesstoFireZone29G,whileanunratedsteelplatehatchintheceilingofFireZone29GprovidesaccesstoFireZone29C.TheESWPumpHouseislocatedwithinthelargerscreenhouse'.area;TheroofoftheESWPumpHouseisatelevation610ft-0in.,whiletheroofof..theScreenHouseisat.-elevation635ft-7in.'afeShutdownEuiment<4FireZones,29A'nd29Bcontain'theUnit1EastandWestESWpumps,respectively.".FireZones29Cand29DcontaintheUnit2EastandWestESW=pumps,"respectively.'heUnit1ESWpumpsprovidealternateshutdowncapabilityforafi'reoccurringintheUnit2ESWpumpcubicles.Conversely,theUnit2ESWpumpsprovidealternateshutdowncapabilityforafireoccurringintheUnit1ESWpumpcubicles.FireZone'29Gcontainscablesforthecomponentsof,both'Units1'=and,2ESWsystems.Thecablesareinconduit,whichareprotectedbyminimumone-hourfire-ratedmateri'al.Page9-152 FireProtectionEuimentAutomaticdetectionsystemsareprovidedintheUnit1ESWpumpcubicles(FireZones29Aand29B)andintheCirculatingWaterPumpMotorControlRoom(FireZone29G).(SeeSections8.9.2and8.11.2.)AutomaticdetectionsystemsarecurrentlybeinginstalledintheUnit2ESWpumpcubicles(Fire'Zones29Cand29D).(SeeSection8.1.0.2.)Automaticsuppressionisnotprovidedinanyofthesefirezonesasidentifiedinexemptionrequests7.5;7.6,and7.7.Manualsuppressioncapabilitiesintheformofportable-extinguishersandhosestationsareavailableforusein.thesezones.FireHazardsAnalsisForafiretoadversely'mpactonredundant.safe.shutdowncapability,firemustinvolveUnits1and'-2';ESW..pumpsandcubicles.ForafireinFireZones29Aand29B(Unit1ESWpumpcubicles),alternateshutdowncapabilityisprovidedbyutilizingUnit.2.ESWpumps.ForafireinFireZones29Cand29D(Unit2ESWpumpcubicles),alternateshutdowncapabilityisprovidedbyutilizingUnit1ESWpumps.TherequiredsafeshutdowncablesinFireZone29Ghasbeenprotectedbyaminimumofone-hourfire-ratedmaterial,thusafireinFireZone29Gwillnotaffectsafeshutdown.FireZone29GandFireZones29Aand29Bcommunicatebyanopenstairway.Afirecanbepostulatedtoinvolvethesefirezones(29A,29Band29G).Inthiscase,Unit1ESWpumpsarePage9-153 potentiallyaffectedandUnit2ESWpumps,locatedinFireZones29Cand29D,shouldbeutilizedtoproviderequiredcoolingwaterforbothunits.Thesteel.platehatchislocatedinthefloor/ceilingassemblyseparatingFireZone29GfromFireZone29C.UndamperedHVACsupplyai,ropenings'xistintheceilingofFireZones29A,298,29C,and29D.,ScreenmeshaccessgatesprovidesaccessintotheUnit1andUnit2ESWpumpsfromtheScreenhouse,FireZone142.Forfiretoadverselyimpactonredundantsafeshutdowncapability,firemusteither:(1)Spreadfrom,FireZone29G'"upthroughtheopenstairwaytoFireZone29BofUnit1andthroughthesteelplatehatchto'FireZone29CofUnit2;,,(2),'pread'rom'theESWpumpcubiclesofoneunit'(throughtheopenstairwayofUnit1orthesteelplatehatchof'Unit.;2)down'ntoFire'one29Gandthenpropagateupintothe'SWpumpcubiclesoftheoppositeunitw~*','throughthe'openstairwayofUnit1orthesteelplatehatchofUnit2);(3)SpreadthroughtheundamperedHVACsupplyairopeningsintheceilingsofFireZones.29A,*29B~,29Cand29D;or(4)SpreadthroughFireZone142intoFireZones29Aand29BandFireZones29Cand29D)viathescreenmeshaccessgatesfromafireoriginatingeitherinFireZone142orintheUnit1orUnit2ESWpumpcubicles.Forthefirsttwofiresthatarepostulated,afireofsufficientdurationandintensitywouldberequiredtochallengetheinherentfireprotectioncapabilitiesofthesteelplatehatch.Thefailurepointofexposedstructuralsteelistakentobewhenitsloadcarryingcapabilityisreducedto60%of.itsPage9-154 yieldstrength.Thislimitnormallyoccurswhenthetemperatureofthesteelreaches1000F.UndertheASTME119StandardTime-Temperaturecurve,anequivalentfireseverityof5-10minutesisrequiredtoachievethistemperature.AlthoughthesteelplatehatchlocatedinthebarrierseparatingFireZones29Cand29Gisnotaloadcarryingstructuralcomponent,the'failurecriteriaofstructuralsteelcanbeappliedtothesteelplatehatchtoestablishaconservativebaseabovewhichfailurecouldbepostulated.Forthethirdandfourthpostulatedfires,afirewouldhavetotravelfromtheESWpumpcubiclesofoneunittotheESWpump.cubiclesoftheotherunit,orintoeach"ofthefourpumpcubiclessimultaneously.Thepathoffirespreadforthethirdpostulatedfirewouldhavetobeviatheundampered.HVACsupplyairopeningsofeachcubicle'ndinvolvethetransientcombustibleloadingontheroofoftheESWpumphouse.Forthefourthpostulatedfire,afirewouldhavetospreadintotheUnit1andUnit2ESWpumpcubiclesthroughtheScreenHouse,FireZone142.Eachisdiscussedseparatelybelow.PostulatedFireNo.1FireZone29Ghasafixedcombustible,loadingofunder13,000Btu/ftforanequivalentfireseverityofunder10minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeareunder11,858Btu/ftand8.8minutes,respectively.)Anequivalentfireseverityof10Page9-155 minuteswouldraisethetemperatureofthesteelplatehatchup"to1000F.SignificantquantitiesoftransientcombustiblesarenotpostulatedinFireZone29Gduetoitscontrolledaccess(vialockedscreengatedoorsintoFireZones29Aand29BandFireZones29Cand29D),andthelackofeasytransportofcombustiblesdownintothezone(theopenstairwayfromFireZone29BandtheladderfromthehatchfromFireZone29C).Thestairwayisalsoprovidedwitha6in.highcurbthatwillpreventspilledcombustibleliquidsfromflowingdownintoFireZone29Gfromabove.Inconjunctionwithaccessibilityproblems,'"over200lbsofwood(withaheatpotentialof8000Btu/lb)would'berequiredtoraisetheequivalentfireseverityinFireZone"29Gbyoneminute.Sincetherearenopumps,sumps,orother=similarequipmentinthezone,lubricatingoilisnotpostulated%asatransientcombustibleasitisnotrequiredformaintenance@purposes.ThecombustibleloadinginFireZone29Gwouldraisethetemperatureofthesteelplatehatchupto1000F.However,twoissuesmitigatethepotentialforthistooccur.ThefirstistheexistingautomaticdetectionsysteminFireZone29G.'-'PostulatedfireswouldbequicklydetectedandannunciatedintheControlRoom,resultinginfirebrigaderesponsetothezone.ThesecondistheopenstairwaytoFireZones29Aand29B.HeatbuildingupatceilinglevelinFireZone29GwouldtendtoflowupthestairwayintoFireZones29Aand29B.Thiswouldiimitheatbuildupinthevicinityofthesteelplatehatch.Therefore,'Page9-156 whilefirecouldspreadfromFireZone29GuptheopenstairwaytoFireZones29Aand29B,reasonableassuranceisprovidedthatitwillnotsimultaneouslyspreadthroughthesteelplatehatchintoFireZones29Cand29D.PostulatedFireNo.2FireZones29Aand29Bhaveafixedcombustibleloadingofapproximately20,000Btu/ftforanequivalentfireseverityofapproximately15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare6,842Btu/ftand5.1minutes,respectively.)TransientcombustibleswouldtaketheformoflubricatingoilduringchangeoutoftheESWpumps.EachESWpumpcontainsfivegallonsoflubeoilforatotaloftengallons.Assumingthattwofive-.gallon,cans.(ataheatpotentialof146,100.Btu/gal)arebroughtin,formaintenancepurposes,theequivalent-fireseveritywould.beincreasedbylessthan5minutes,foratotalequivalentfireseverityfromfixedandtransientcombustiblesofapproximately20minutes.AfireresultingfromthisquantityoffixedandtransientcombustiblescouldspreaddownthroughthestairwayopeningintoFireZone29G.However,duetothenaturaltendencyforfiretospreadupwardsandoutwards,thiswouldonlyresultfromaspilloflubricatingoildownthestairway.Thepotentialforthistooccurislimitedbythe6-in.highcurbaroundtheper'imeterofthestairway.FirewouldthenhavetospreadthroughFireZone29GintoFireZones29Cand29Dthroughtheunratedhatch.Thisscenariowaspreviouslyaddressedandisnotacredibleevent.Page9-157 FireZones29Cand29Dhaveafixedcombustibleloadingofapproximately20,000Btu/ftforanequivalentfireseverityofapproximately15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare6,842Btu/ftand5.1minutes,respectively.)Transientcombustibleswouldtaketheformoflubricatingoilduringchange-outoftheESWpumps.EachESWpumpcontainsfivegallonsoflubeoilforatotaloftengallons.Assumingthattwo5-galcans(ataheatpotentialof146,100Btu/gal)arebroughtinformaintenancepurposes,theequivalentfireseveritywouldbeincreasedbylessthanfiv'eHowever,thehatchislocatedintheThehighertemperaturesassociatedwithsteelhatchupto1000F.floorofFireZone29C.afireineitherFireZone29Cor29Dwouldtendtobenearceilinglevel.Floor-basedtemperaturesshouldbeconsiderablylowerthanthoseatceilinglevel.Thefloorhatchentranceisminutes,foratotalequivalentfireseverityfromfixedand%ttransientcombustiblesofunder20minutes.Anequivalentfireseverityofundertenminuteswouldraisethetemperatureofthealsoraisedabovetherestofthefloorbya12in.highcurb.ThiscurbwillpreventspilledcombustibleliquidsfromburningdirectlyonthehatchandflowingdownthroughthehatchinFireZone29Gbelow.AutomaticdetectionisprovidedinFireZones29Cand29D.Thiscombinationofdetection,aseverityofunder20minutes,andcurbednequivalentfirehatchprovidesreasonableassurancethatafireinvolvingfixedand/ortransientcombustiblesinFireZones29Cand29DwouldnotadverselyimpactPage9-158 onthecapabilityofthesteelplatehatchtoprotecttheopeninginthebarrier.PostulatedFireNo.3Forthethirdpostulatedfire,sufficientcombustiblematerialmustbepresentontheroofoftheESWPumpCubiclestoimpactonredundantsafeshutdowncapabilitiesinFireZones29Aand29BandFireZone's29Cand29D.IgnitionofthismaterialeitherindependentlyorastheresultofafireintheUnit1orUnit2ESWPumpCubiclescouldresultinlossofredundantsafeshutdowncapability.Theroofofthecubiclesisusedfortemporarystorageofsignificantamountsofwood,rubberhoses,andthelike.Therefore,thepostulatedfiresp'reviouslyaddressedinthisevaluationcouldspreadupthroughtheundamperedHVACsupplyair-openingsandignitethematerialontheroof.Ignition'ofmaterialonthe'oof-.inthismanner,orignitionofthematerialindependently,couldresultinfirebeingpulledthroughthesupplyairopeningsintoredundantESWpumpcubiclessimultaneously.Assuch,three-hour-rateddamperswillbeinstalledintheHVACopeningstotheUnit2ESWPumpCubicles.ThiswillensurethattheUnit2ESWPumpCubicleswillbeunaffectedbyafireinvolvingtransientcombustiblesontheroofofthecubicles.FirecouldspreaddownthroughtheundamperedopeningsintoFireZones29Aand29B.However,aspreviouslydemonstrated,afireinFireZones29Aand29BthatspreadsdownintoFireZone29GwillnotresultinafireofPage9-159 sufficientdurationthatwillchallengethesteelplatehatchandspreadupintoFireZones29Cand29D.PostulatedFireNo.4Forthefourth.postulatedfire,sufficientcombustiblematerialmustbepresentintheScreenhouse,FireZone=142,to-allowfiretospreadbetweentheUnit1andUnit2ESWpumpcubiclesviathescreenmeshaccess.gates.This~ouldinvolvefirespreadingalineardistanceofapproximately175ft.FireZones29Aand29BandFireZones29Cand29Dhavefixedandtransientcombustibleloadingsofapproximately20,000.Btu/ft~forequivalentfireseveritiesofapproximately15minutes.(The.,actualcombustibleloadingandequivalentfireseverityexistingratthistimeare6,842Btu/ftand5.1minutes,respectively.)'FireZone142hasafixedcombustibleloadingof.approximately'~."53,000Btu/ftfor.equivalentfire.severityof40minutes.(The'='actualcombustibleloadingandequivalentseverityexistingatthistimeare25,652Btu/ftand19minutes,respectively.)Withafloor.areaofapproximately18,608ft,itwouldtakeatransientcombustibleloadingof3100lbs.ofwoodat8000IBtu/lb.toresultinatransientfireseverityofoneminute..',Firesoccurringin,orspreadinginto,FireZone142wouldtendtoriseuptoceilinglevel.FireZone142hasaceilingheightofapproximately45ft,whilethatoftheESWpumpcubiclesisapproximately15ft.'asedontheamountofcombustibleloadingintheUnit1andUnit2ESWpumpcubiclesandintheScreenhouse,alongwiththe45ftvs.15'tceilingheights'IPage9-160 betweenthetwo,firespreadingthroughtheScreenhouseto/fromtheESWpumpcubiclesofbothunitsisnotacredibleevent.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireoriginating:(1)ontheroofofESWPumpHouse;(2)inFireZones29Aand29B;,(3)inFireZone-29G;(4)inFireZones29Cand29D;or(5)inFireZone142,wouldnotimpairsafeshutdowncapabilitiesofD.C.CookUnits1and2.Inaddition,thisevaluationdoesnotimpactonthebasesofthefullareaandfix'edsuppressionexemptionrequestsintheESWPumpHouseanditdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusion-aresummarizedasfollows:(1)"Anequivalentfireseverityof5-10minutesisrequiredtoraisethetemperatureofloadcarryingstructuralsteeluptoitsfailure'ointof1000F.(2)(3)Thesteelplatehatchisnotaloadcarryingstructuralcomponent;however,a5-10minutefireseveritycanbeusedtoestablishaconservativebaseabovewhichfailurecouldbepostulatedwithoutadditionalfireprotection.Inordertoimpactonredundantsafeshutdowncapability,firewouldhavetospreadeitherthr'oughthehatchseparatingFireZones29Cand29DfromFireZone29G,orintotheUnit1andUnit2ESWcubiclesviatheundamperedHVACsupplyairopeningsintheceilingofallfour'cubicles,(however,amodificationisproposedtoinstallfire-rateddampersintheceilingofFireZones29Cand29D,makingthispathofspreadnotacredibleevent)orthroughthescreenmeshaccessgatesintoFireZones29A,29B,29C,and29D.Thepotentialpathsforfirespreadthroughtheseopeningsareasfollows:Page9-161 (a)FromFireZones29Aand29BdownintoFireZone29GandthenupthroughtheunratedhatchintoFireZones29Cand29D;(b)FromFireZones29Aand29BuptotheroofoftheESWPumpHousethroughtheundamperedHVACsupplyairopeningsandthendownintoFireZones29Cand29D;(c)FromFireZones29Cand29DdownthroughtheunratedhatchintoFireZone29GandthenupintoFireZones29Aand29B;(d)FromFireZones29Cand29DuptotheroofoftheESWPumpHousethroughtheundamperedHVACsupplyairopeningsandthendownintoFireZones29Aand29B;(e)FromtheroofoftheESWPumpHousedownthroughtheundamperedHVACsupplyairopeningsintoFj.reZones29Aand29BandFireZones29Cand29Dsimultaneously;(f)FromFireZone29GuptheopenstairwayintoFireZones29Aand29Bandthroughtheunratedhatch.intoFire'ones29Cand29Dsimultaneously;(g)FromFireZones29Aand29B(orFireZones29Cand29D)outthroughthescreenmeshaccessgateintoFireZone142thenthroughthescreenmeshaccessgateintoFireZones29C..and29D(orFireZones29Aand29B);or(h)IntoFireZones29Aand29BandFireZones29Cand29DsimultaneouslythroughthescreenmeshaccessgatesfromFireZone142.(4)FireZone29Ghasanequivalentfireseverityofundertenminutes;over200lbsofwoodorllgallonsoflubricatingoilwouldberequiredtoraisethefireseveritybyoneminute.(5)AccessandtransportofcombustiblesintoFireZone29Gisrestrictedby.thelockedscreenmeshaccessgatesabove,thestairwayfromFireZone29B,andtheladderfromFireZone29C.Inaddition,the6in.highcurbaroundthestairwayopeningand12in.highcurbaroundthehatchentrancewillpreventflowofspilledcombustibleliquidsdownintoFireZone29GfromFireZones29Band29Crespectively.Page9-162 (6)FireZones29Aand29BandFireZones29Cand29Dhaveanequivalentfiresever,ityofunder15minutes;transientcombustibles(lubricatingoil)duringmaintenanceactivitiescouldraisethefireseveritybyundertenminutes.(7)Duetothelocationofthesteelplatehatch,inthefloor-ofFireZone29C,theonlycrediblefiretoimpactonthehatchisonethatoccursinFireZone29Gbelow.ApostulatedfireinFireZone29Gwouldbequicklydetected,resultinginfirebrigaderesponse,.Inaddition,heatbuildingupatceilinglevelinFireZone29GwouldtendtoflowuptheopenstairwaytoFireZones29Aand29B.ReasonableassuranceisprovidedthatafireinFireZone29GwillnotspreadsimultaneouslytoFireZones29Aand29BandFireZones29Cand29D.(8)(9)Three-hour-rateddamperswillbeinstalledintheHVACopeningsintheceilingofFireZones29Cand29D.AutomaticdetectionisprovidedthroughouttheESWPumpHouse(inFireZones29A,29B,29C,29Dand29G).(10)Replacingthesteelplatehatchwithoneofratedconstructionwouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfigurationandproposedmodification.(11)ThescreenmeshaccessgatesintoFireZones29Aand29Bandinto.FireZones29Cand29Dareseparatedbyalineardistanceofapproximately175ft.Duetothe40minuteequivalentfireseverityinFireZone142,the15minute.equivalentfireseverityinFireZones29Aand29BandFireZones29Cand29D,andthe45-ftceilingheightoftheScreenhouse,reasonableassuranceisprovidedthatfirewillnotspreadbetweentheUnit1andUnit2ESWpumpcubiclesviatheScreenhouse.Page9-163.,

9.26FireArea9andFireArea10BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactofcombiningFireAreashutdowncapability.fireareaboundaries9withFireArea10onredundantsafeThiscombinationwillreducethenumberofwhichrequiresurveillance.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireArea9istheUnit1Quadrant3NCableTunnellocatedonthe596ftelevationoftheAuxiliaryBuilding.FireArea10istheQuadrant3MCableTunnelandislocateddirectlysouthof*FireArea9onthe596ftelevation.'Safe'ShutdownEuimentFireAreas9and10donotcontainsafeshutdowncomponents;-however,eachareacontainssafeshutdowncables.FireArea10containssafeshutdowncablesforthefollowingUnit1components:HotShutdownComonents(1)Onetrainofsteamgenerators1,',3and4levelinstrumentation;(2)Onetrainofauxiliaryfeedwatersupplyvalvesforsteamgenerators2and3;(3)Onetrainofpressurizerwaterlevelinstrumentation;(4)Onetrainof.RCSpressureinstrumentation;(5)Steamgenerators1and4PORVs;Page9-164 (6)Reactorheadventvalves;(7)Post-accidentsamplingventvalves;(8)Loops2and3coldlegtemperatureinstrumentation;(9)Loops2and3hotlegtemperatureinstrumentation;(10)OnepressurizerPORUblockvalve(poweronly);(ll)OnepressurizerPORU;and(12)Onetrainofletdownisolationvalves.ColdShutdownComonents(1)OneRHRinletandoneRHRoutletisolationvalves;and(2)Loops1and3safetyinjectionaccumulatorsvalves.FireArea9containssafeshutdowncablesforthefollowingUnit1components:HotShutdown(1)TwopressurizerPORUblockvalves(poweronly).ColdShutdown2(1)Ioops2and4safetyinjectionaccumulatorvalves;and(2)OneRHRinletiSolationvalve.FireProtectionEuimentFireArea9andFireArea10arebothprovidedwithautomaticC02suppressionsystemsandautomaticdetectionsystems.FireHazardsAnalsisInordertomitigatepossiblespuriousoperation,thefollowingvalveswillrequiredeenergizingfromtheControlRoomforhotshutdown:Page9-165 (1)Onereactorheadvent;(2)Onepost-accidentsamplingventvalve;(3)OnepressurizerPORV;and(4)Steamgenerators1and4PORVs.Inordertoachievecoldshutdown,thefollowingvalveswouldrequiremanualoperation:(1)TwoRHRinletisolationvalves;(2)Loops1,2,3and4safetyinjectionaccumulatorvalves;and(3)RHRoutletisolationvalve.Baseduponthe'reviouslyidentifiedmodificationsandmanualoperatoractions,one'rainofsafeshutdownsystemsandcomponentswill.beavailableindependentofcombinedFireAreas9and10.ConclusionBasedontheaboveevaluation,providedthatafireincombinedFirereasonableassuranceisIAreas9and10wouldnotimpairthesafeshutdowncapabilitiesatD.C.CookUnits1or2.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifythisconclusionaresummarizedasfollows:RedundantsteamgeneratorlevelinstrumentationexistsoutsideFireAreas9and10.Page9-166 (2)Loops1and4hotandcoldlegtemperatureindicationisunaffected.(3)SafetyinjectionaccumulatorsandRHRinletandoutletisolationvalvesarelocatedoutsideFireAreas9and10allowingthevalvestobemanuallyoperated.(4)'ThecapabilitytodeenergizethefollowingvalvestofailinsafepositionisavailablefromtheControlRoom;reactorheadventvalves,steamgeneratorPORVs,post-accidentsamplingventvalvesandpressurizerPORVs.(5)OnetrainofredundantsafeshutdownsystemsandcomponentsareavailableindependentofFireAreas9and10combined.(6)BothfireareasareprovidedwithautomaticC02suppressionsystems.nPage9-167f 9,.27FireArea24andFireArea25BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactofcombiningFireArea24withFireArea25onredundantsafeshutdowncapability.Thiscombinationwillreducethenumberoff:;ireareabarrierswhichrequiresurveillance.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireArea24istheUnit2Quadrant3MCableTunnellocatedVonthe596ftelevationoftheAuxiliaryBuilding.FireArea25istheQuadrant-3SCableTunnelandislocateddirectlysouthof~lFireArea24onthe596ftelevation.SafeShutdownEuiment.,r~FireAreas24and25donotcontainsafeshutdowncomponents;however,eachareacontainssafeshutdowncables.FireArea24containssafeshutdowncablesfor;thefollowingUnit2components:HotShutdownComonents(1)Twooutoffourtrainsofsteamgenerators1,2,.3and4level.instrumentation;(2)Onetrainofauxiliaryfeedwatersupplyvalvesforsteamgenerators1and4;(3)Twooutoffourtrainsinstrumentation;ofpressur'izerwaterlevel(4)OnetrainofRCSpressureinstrumentation;Page9-168 (5)Reactorheadventvalves;(6)Post-accidentsamplingventvalves;(7)Loops2and3coldlegtemperatureinstrumentation;(8)Loops2and3hotlegtemperatureinstrumentation;(9)OnepressurizerPORVblockvalve(poweronly);(10)OnepressurizerPORV;(ll)Onetrainofletdownisolationvalves;(12)Twooutofthreeofsteamgenerators1and4pressureinstrumentation;and1(13)Onetrainofsourcerangemonitoringchannel.(14)2-LSZ-6XXColdShutdownComonents(1)OneRHRinletandoneRHRoutletisolationvalves;and(2)Loops1and3safetyinjectionaccumulatorsvalves.Fire,Area25containssafeshutdown,cablesforthe,followingUnit2components:HotShutdown(1)TwopressurizerPORVblockvalves(poweronly).ColdShutdown(.1)Loops2and4safetyinjectionaccumulatorvalves;and(2)OneRHRinletisolationvalve.FireProtectionEuimentFireArea24andFireArea25bothhaveautomaticC02suppressionsystemsandautomaticdetectionsystems.Page9-169 FireHazardsAnalsisInordertomitigatepossiblespuriousoperation,thefollowingvalveswillrequiredeenergizingfromtheControlRoomforhotshutdown:(1)Onereactorheadvent;(2)Onepost-accidentsamplingventvalve;and(3)OnepressurizerPORV.Inordertoachievecoldshutdown,thefollowingvalveswouldrequiremanualoperation:(1)TwoRHRinletisolationvalves;(2)Loops1,2,'and4.safetyinjectionaccumulatorvalves;and"(3)RHRoutletisolationvalve.Baseduponthe,previouslyidentifiedmodificationsandmanualoperatoractions,.onetrainofsafeshutdownsystemsandcomponentswillbeavailableindependentofcombinedFireAreas24and25.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatafireincombinedFireAreas24and25wouldnotimpairthesafeshutdowncapabilitiesatD.C.CookUnit2.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequest-containedinthisreport.Thebasesthatjustifythisconclusionaresummarizedasfollows:Page9-170 (1)RedundantsteamgeneratorlevelinstrumentationexistsoutsideFireAreas24and25.(2)Loops1and4hotandcoldlegtemperatureindicationisunaffected.(3)SafetyinjectionaccumulatorsandRHRinletandoutletisolationvalvesarelocatedoutsideFireAreas24and25allowingthevalvestobemanuallyoperated.(4)ThecapabilitytodeenergizethefollowingvalvestofailinsafepositionisavailablefromtheControlRoom;reactorheadventvalves,post-accidentsamplingventvalvesandpressurizerPORVs.(5)OnetrainofredundantsafeshutdownsystemsandcomponentsareavailableindependentofFireAreas24and25combined.(6)BothfireareasareprovidedwithautomaticC02suppressionsystems.Page9-171 9.28FireArea61andFireZone5BoundarEvaluation~PuruseThepurposeofthisevaluationistoanalyzetheimpactof"combiningFireArea61withthefireareacontainingFireZones5,6A,6N,6M,6S,64A,64B,65Aand65Bonredundantsafe<shutdowncapability.Thiscombinationwillreducethenumberoffireareaboundarieswhichrequiresurveillance.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZones64A,64B,65Aand65B<<~SafetyInjectionPumpRoomsonthearetheUnit1andUnit2587ftelevationintheAuxiliaryBuilding.FireZones5,6N,6Mand6Saretheeastand'iwestcommonareasofUnits1and2onthe587ftelevationinthe':~AuxiliaryBuilding.FireZone6Aisapipetunnellocatedonthe'601ftelevationoftheAuxiliaryBuildingaboveFireZones5,6N,6M,6S,62A,62B,62C,63A,63Band63C.FireArea61istheSprayAdditiveTankRoomlocatedonthe587ftelevationoftheAuxiliaryBuildingadjacentto'FireZone5.FireZones62A,62B,and62CareUnit1chargingpumpcubiclesandFireZones63A,63B,and63CareUnit2chargingpumpcubicleslocatedon587ftelevationofAuxiliaryBuildingadjacenttoFireZone5.SafeShutdownEuimentFireArea61doesnotcontainsafeshutdowncomponentsorcables.FireZones5,6A,6N,6M,6S,64A,64B,65Aand65BPage9-172 containsafeshutdowncablesand/orcomponentsforbothUnits1and2.FireProtectionEuimentFiredetect.ionsystemsareinstalledthroughoutFireZones5,6N,6M,6S,64A,64B,65A,65BandFireArea61.AutomaticsuppressionisprovidedinFireZones.5,6N,6M,6S,64A,64B,65Aand65BbutnotinFireArea61.Manualsuppressioncapabilitiesintheformofportableextinguishersandhosestationsareavailableforuseinbothfireareas.FireHazardsAnalsisFireArea61isseparatedfromFireZone5byreinforcedconcretewalls.FireArea.61hasafixedcombustibleloading.ofunder27,000Btu/ft,whichcorresponds,toanequivalentfireseverityof20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare13,846and10.4minutes,respectively.)AutomaticdetectionisprovidedinFireArea61,whichwillprovideearlywarningandpromptmanualfirefightingactivities.IfafirewastostartinFireArea61,reasonableassuranceisprovidedthatthefirewouldbecontainedandburnoutbeforeitspreadstoFireZone,5.Thiscanbeaccreditedtothefireseverityoflessthan20minutesandtheexistenceofconcretewalls.IfthefirewastospreadfromFireArea61toFireZone5,theautomaticdetectionandsuppressionsystemsinFireZone5wouldactuateandcontroland/orextinguishthefirebeforeitcoulddamagethesafeshutdowncablesinFireZone5.Page9-173 FireZone5,whichisadjacenttoFireArea61,hasacombustibleloadingofunder27,000Btu/ftforanequivalent-fireseverityof20minutes(theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare11,229Btu/ftand8.5minutes,respectively);however,FireZone5isprovided"withanautomaticdetectionsystemandanautomaticpreactionsprinklersystem.SinceFireArea61doesnotcontainsafeshutdowncablesorcomponents,combiningitwiththefireareacontainingFireZones5,6A,6N,6S,6M,64A,64B,65Aand65Bwillnotimpactsafeshutdowncapability.Thecompliancestrategyforthesezoneswillbethesameasidentifiedinthe1983AppendixRsubmittal.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatcombiningFireArea61withFireZones5,6A,6N,6M,6S,64A,64B,65A,and65BwillnotimpairthesafeshutdowncapabilitiesofD.C.CookUnits1and2.Thebasesthatjustifytheconclusionaresummarizedasfollows:FireArea61hasanequivalentfireseverityoflessthan20minutes.(2)(3)FireArea61system.FireArea61isseparatedwithreinforced.concretewallsthatwilllimitfirespreadtoFireZone5.isprovidedwithanautomaticdetectionPage9-174 (4)FireArea61doesno'tcontainsafeshutdowncomponentsorcables;therefore,combiningFireArea61withfireareacontainingFireZones5,6A,6N,6M,6S,64A,64B,65Aand65Bwillnotaddanysafeshutdowncablesorcomponents.i(5)Manualfiresuppressionsystemsareavailableforbothfireareas.(6)IfafireshouldspreadfromFireArea61toFireZone5,theautomaticdetectionandtheautomaticpreactionsprinklersuppressionsystemswouldcontroland/orextinguishthefirebeforeitcoulddamagethesafeshutdown"cablesandcomponentsinFireZone5.Page9-175 9.29FireArea105andFireAreas33,33A,33BBoundarEvaluation~PuroeeThepurposeofthisanalysisistoanalyzetheimpactofcombiningFireArea105withthefireareacontainingFireZones33,33A,33Bonsafeshutdowncapability.Thiscombinationwillreducethenumberoffireareaboundarieswhichrequiresurveillance.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireArea'105.-is'heUnit1ContractorAccessControlBuildinglocated*onthe612ftelevationdirectlynorthofFireZone33A.FireZone33AistheUnit1EastMainSteamLineAreaI'ocatedonthe612'televationoftheAuxiliaryBuilding.FireZone33BistheUnit1NonessentialServiceWaterValveArealocatedsouthwestofFireZone33Aonthe612ftelevationoftheAuxiliaryBuilding.FireZone33istheUnit1EastMainSteamValveEnclosurelocatedsoutheastofFireZone33Aonthe612ftelevationoftheAuxiliaryBuilding.SafeShutdownEuimentFireArea105doesnotcontainsafeshutdowncomponentsorcables.ThefireareacontainingFireZones33,33A,33Bcontainsthefollowingsafeshutdowncomponents:Unit1steamgenerators1and4PORVs,auxiliaryfeedwatersupplyvalves,Page9-176 steamgenerators1and4mainsteamstopvalves(MSSVs),steamgenerators1and4pressuretransmitters,andUnit1LocalShutdownIndicationpanelsLSI-1andLSI-5.FireZones33,33A,and33Balsocontainsafeshutdowncablesfortheabove-mentionedsafeshutdowncomponents.FireProtectionEuimentFireArea105isprovidedwithanautomaticwetpipesprinklersystem.DetectionsystemisprovidedforFireZones33,33A,and33B.ManualdelugewaterspraysystemisprovidedforthecharcoalfilterunitslocatedinFireZone33A.FireHazardsAnalsisSinceFireArea105doesnotcontainsafeshutdowncablesorcomponents,combiningitwiththefireareacontainingFireZones33,33Aand33B,will.notaffectsafeshutdown.Thesafeshutdowncompliancestrategyforbothoftheseareaswillbethesameaspreviouslyidentifiedin.the1983AppendixRsubmittalwheresafeshutdownisachievableindependentofbothfireareas.FireZones33Aand33B,whicharepartofFireArea33,33Aand33B,wereaddressedintheseismicgapexemptionrequest(see.Section7.14).TheexemptionrequestconcludedthatafirestartingfromFireZone33BmaypropagatethroughtheseismicgaptoFireZones33A,.38,and108.ThebasesforthisjustificationisstillacceptableifFireArea105iscombinedwithFireZones33,33Aand33Bforthe.followingreasons:Page9-177 (1)FireArea105doesnotcommunicatedirectlywithFireZone33B.ItonlycommunicateswithFireZone33A.(2)ThecombustiblesinFireArea105areseparatedfromFireZone33Abyunratedgypsumwallswithunsealedpenetrationsandunratedaccessdoors.(3)AfirepropagatingthroughtheseismicgapbetweenFireZones33B,38,and108wouldbelimitedasstatedintheseismicgapevaluationbecause-ofthelowcombustibleloadingneartheseismicgapand/orpresenceofdetectionandsuppressionsystems.(4.)RedundantsafeshutdownsystemsandcomponentsareindependentofFireZones33A,33B,38and108asstatedinthepreviousseismicgapevaluation.FireZone33,whichispartofFireArea33,33A,and33B,wasalsopartofaboundaryevaluationinvolvingFireArea116(seeSection9.23).FireArea116isapipetunnelin.excessof250ftconnectingFireZone33andFireArea12.Aspreviouslystatedinthisanalysis(Section9.23),ifafireweretopropagatethroughFireZone33'ti12,safeshutdownwouldnotbenotadjacenttoFireZone33componentsorcables,itwillforthisevaluation.andFireArea116andFireAreaaffected.SinceFireArea105isanddoesnotcontainsafeshutdownnotjeopardizethejustifications'ZheFireArea33,33A,33Bexemptionrequestaskedforanexemptionfromthe'requirementforafixedsuppressionsysteminstalledintheareaswherealternateshutdowncapabilityexistasrequiredbyIII.G.3ofAppendixR(seeSection7.8).Thejustificationsforthisexemptionaresummarizedasfollows:PPage9-178 (1)Affectedcomponentsinthefireareahavealternateshutdowncapability.(2)Thecomponentsofconcernarehorizontallyseparatedbygreaterthan100ft.(3)Thecombustib/eloadinginthefireareaisunder27,000Btu/ftwithanequivalentfireseverityofapproximately20minutes.(Theactualcombustibleloadingandequivalen[fireseverityexistingatthistimeare9,530Btu/ftand7minutes,respectively.)(4)ThemodificationsrequiredtomeetSectionIII.G.3wouldnotsignificantlyenhancefireprotectionsafetyabovethatprovidedbypresentcommitments.FireArea105hasacombustibleloadingofunder33,000Btu/ftwhichcorrespondstoafireseverityof25minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare15f619and11.7minutes,respectively.)HHowever,,FireArea105isprovidedwithanautomaticwetpipesprinklersystem.IfafireweretostartinFireArea105,itwouldbe1extinguishedbeforeitcouldspreadtoFireZone.33B.ThereforetheexemptionrequestforFireArea33,33A,33BisunaffectedbycombiningFireArea105withFireArea33,33A,33B.ConclusionBasedontheaboveevaluation,reasonableassuranceisprovidedthatcombiningFireArea105withthefireareathatcontainsFireZones33,33Aand33BwillnotimpairthesafeshutdowncapabilitiesofD.C.CookUnits1and2.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Page9-179 The.basesthatjustifytheconclusionsaresummarizedasfollows:FireArea105isseparatedfromFireZone33Abyunratedgypsumwallswithunsealedpenetrationsandunratedaccessdoors.(2)FireZone105doesnotcontainsafeshutdowncomponentsorcables.(3)FireArea105willnotaffectthejustificationsfortheseismicgapevaluationbecauseofdistancefromseismicgap,thewallseparatingitfromFireZone33Aandexclusionofsafeshutdowncablesorcomponents.(4)FireArea105willnotaffectthejustificationfortheFireZone116boundaryevaluationbecauseFireArea105doesnotcontainsafeshutdowncomponentsorcables,andisnotadjacenttoFireZone33.(5)FireArea105isprovidedwithanautomaticwetpipesprinklersystem.Page9-180 9.30FireZones3,32,36,48,49,50,51,52,69andFareAreas106,107,31,35,146BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactof'ombiningthefireareacontainingFireZones3,32,36,48,49,50,51,52,and69withFireAreas106,107,31,35,and146onredundantsafeshutdowncapability.Thiscombinationwillreducethenumberoffireareaboundariesthatrequiresurveillanceandwillnotadverselyimpactonotherrequestscontainedinthisreport.evaluationsorexemptionFireZone/Area332364849505152691061073135146*Drumming/StorageAreaCaskHandlingAreaSpentFuelPitPumpRoomNewFuelStorageRoomUnit1HVACVestibuleUnit2HVACVestibuleEastEndAuxiliaryBuildingWestEndAuxiliaryBuildingAuxiliaryBuildingUnit1Aux.FeedwaterBatteryUnit2Aux.FeedwaterBatteryConcreteMixingBuildingInstrumentCalibrationRoomLoadingPlatformAreaElev.(ft)589609609633633633633650Room633Room633609609609*TheLoadingPlatformareawasnotpreviouslyidentifiedasafirezoneinthe1983AppendixRsubmittal.SafeShutdownEuimentThefireareadefinedbyFireZones3,32,36,48,49,50,51,52and69containssafeshutdownequipment,whichislocatedPage9-181 inFireZones50,52and69.Thisequipmentincludes1-CMO-429,2-CMO-429(CCWtoRHRheatexchangerisolationMOV),1-CCW-214,,1-CCW-220,2-CCW-214,2-CCW-220(CCWsurgetankmanualisolationIvalves),MCCs1-AM-A,2-AM-A,1-AM-D,2-AM-DandbatterydistributioncabinetDCN(Unit1andUnit2).Variouscablesare,routedinFireZones32,50,51,52and69ofthisfirearea.Basedonthesafeshutdownsystemanalysis,intheeventofafireinthisfirearea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoringinstrumentation.However,theMarch1983submittalrecommendedtheadditionofanalternatesourcerangeneutron,monitoringchanneltoprovideindicationatlocalshutdownpanelLSI-4locatedinFireZone5.FireAreas31,35and146containnosafeshutdownequipment,and/orcables.FireAreas106and107containBNbatteriesandassociatedcables.TheassociatedcablesofUnit1BNbattery,whichislocatedinFireArea106,areroutedtoFireZone52.4~1TheassociatedcablesofUnit2BNbattery,whichislocatedinFireArea107,areroutedtoFireZone50.Page9-182 FireProtectionEuimentFireAreas106and107areeachprovidedwithanautomaticheatdetector.AutomaticdetectionorsuppressioncapabilityisnotprovidedinFireAreas31,35,106,107,and146.FireZones32,48,and69areprovidedwithionizationsmokedetectorsandpartialdetectioncoverageisprovidedinFireZone3.DrypilotpreactionsuppressionsystemsareprovidedinFireZone32andpartialcoverageisprovidedinFireZone3.Inaddition,FireZone69isprovidedwithanautomaticthermistordetectionsystemandmanualdelugesystemfortheHVACcharcoalfilterunits.FireZone49,50,51;and52areprovidedwithautomaticfireprotectionfeatures,specificallyareaionizationsmokedetectionandeachcha'rcoalfilterunitisprovidedwithamanualdelugesystemwith.anautomaticthermistordetectionsystem.AnautomaticdrypilotpreactionsuppressionsystemisprovidedinthenormallyaccessibleareaofFireZones51and52.FireHazardsAnalsisThesafeshutdowncompliancemethodforthecombinedfireareaswillnotchangefromthatidentifiedinthe1983AppendixRsubmittalforthefireareacontainingFireZones3,31,32,35,36,48,49,50,51,52,69,106,107and146sincethesafeshutdowncablesinFireAreas106and107,alsoarecontainedinFireZones50and52.Page9-183 Conc'lusionIBasedontheresultsofthepreviousevaluation,FireAreas'31,35,106,107,and146canbecombinedwithFireZones3,32,.'36,48,49,50,51,52,and69toformalargerfirearea.This"-'evaluationdoesnotadverselyimpactonotherevaluationsor<exemptionrequestscontainedinthisreport.ThebasisforthisconclusionisthatonlyFireAreas106and107containsafeshutdowncablesandthesecablesarealsolocatedinFireZone52.Page9-184 9.31BoundarEvaluationofFireZones62A,62Band62C~PuroseThepurposeofthisevaluationistoanalyzetheimpactofsteelplatecoveredaccessopeningstoverticalchases/leakagedetectionboxesinFireZones62A,62B,and62CthatconnecttheRHRandcontainmentspraypumps,belowwiththeirheat-exchangersaboveon(1)redundantsafeshutdowncapabilityand(2)thefullareasuppressionexemptionrequestforthe573ftelevationoftheAuxiliaryBuilding.Inaddition;.thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.DescritioneThecontainmentsprayandRHRpumps.,'are-locatedonthe573ftelevationoftheAuxiliaryBuildinginFireZones1A,1B,1Cand1D.Theheatexchangers-associatedwiththesepumpsarelocatedon609ftelevationinFireZones44A,44B,44Cand44D.ThepipingbetweeneachpumpanditsheatexchangerpassesthroughFireZones62A,-62B,and62Conthe587ftelevation.Thepipingforeachpump/heatexchangerisenclosedwithinaseparateconcretechase.OnechaseexistsinFireZone62A,twoinFireZone62B,andoneinFireZone62C.Asteelplatecovernormallyboltedontoonefaceofeachchaseprovidesaccessintothechaseforleakagedetectionpurposes.Thetopandbottomofeachchaseisnotsealed.Page9-185 SafeShutdownEuimentFireZoneslAandlBcontaintheUnit1containmentspraypumpswiththeirassociatedheatexchangeslocatedinFireZones44Aand44B.This-equipmentsisnotrequiredforsafeshutdownpurposes.FireZones1Cand1DcontaintheUnit1RHRpumpswiththeirassociatedheatexchangerslocatedinFireZones44Cand44D.Theyarerequiredforcoldshutdownpurposesonly.TheadequacyofRHRpumpseparationandmanualoperationsofvalvesintheheatexchangercubicleswereaddressedintheMarch1983App'endixR"'submittal.FireZones62A,62Band62CcontaintheUnit1Gharging'umps.:."Given'-fire'hatinvolvesthesefirezones,c'ompletealternateshutdown,capabilityis"providedoutsideoftheareausing.Unit,2equipment..F'ireProtectionEuimentAutomaticionizationdetectionsystemsareinstalledinFireZones1A,lB,1Cand1DandinFireZones62A,62Band62C.ApreactionsprinklersystemisinstalledinFireArea62A,62Band62C.AutomaticdetectionandsuppressioncapabilitiesarenotprovidedinFireZones44A,44B,44Cand44D.Manualsuppressioncapabilities.in.the.formofportableextinguishersandmanualhosestationsareavailableforuseinalllocations.FireHazardsAnalsisThefixedandtransientcombustibleloadinginFireZoneslA,1B,1Cand1Disunder20,000Btu/ftforanequivalentfire2Page9-186 severityofunder15minutes.(Theactualfixedcombustibleloadingexistingatthistimeislessthan6,242Btu/ftforanequivalentfireseverityofunderfiveminutes.)ThefixedcombustibleloadinginFireZones62A,62Band62Cis47,-000Btu/ftforanequivalentfir'eseverityofunder35minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare32,538Btu/ftandunder25minutes,respectively.)Theautomaticdetectionandpreactionsprinkler'Isystemsinthesezoneswillacttolimittheimpactoftransientcombustibles,providedthatthey.,arenotofsuchaquantitytooverwhelmthesuppressionsystem.ThefixedandtransientcombustibleloadinginFireZones44A,44B,44Cand.44Disunder;20,000Btu/ftforan"equivalentfire-severityof15minutes;-'Theactualfixedcombustibleloadingexistingat.thistimeis5573forequivalentfireseverityoffourminutes.)573ftElevationTheRHRpumpsand,heatexchangersarerequiredsolelyforcoldshutdownpurposes.TheMarch1983AppendixRsubmittaldemonstratedthatafireoccurringonthe573ftelevationoftheAuxiliaryBuildingwouldnotimpactonredundantsafeshutdown,capabilityoftheRHRpumps.Therefore,,theonlypotentialimpactforfireonthe573ftelevationwouldbeforfirespread-upintothechargingpumpcubiclesand/ortheRHRheatexchangercubicles.Page9-187 Basedonafixedand,transientcombustibleloadingof20,0002hBtu/ftforanequivalentfireseverityof15minutes,thesteelplatecoverswouldhavetoberemovedfromtheverticalchases/leakage.detectionboxesinordertoimpactonth'echargingpumpsinFireZones62A,62Band62C.Shouldfireenterthechargingpumpcubicles,'heexisting'preactionsprinklersystemwouldacttomitigatefirespreadinthecubicles.1naddition,completealternateshutdowncapabilityisavailableforafirethatspreadsintotheUnit1chargingpumpcubiclesfromtheUnit1;.RHRorcontainmentspraypump.cubiclesbelow.'hould'f'i:respreaduptheleakdetection..=boxesfromtheRHRpumpcubiclestoto...theRHR.heatexchangercubicles,sufficienttimeexi'stsformanually,operating*any~required.valvesin'the*heatexchangercubiclestoachievecold'shutdownconditions.'-Assuch,"fireontahe573ft-elevationof,the,'AuxiliaryBuildingwill'otadverselyimpactonredundanthotorcoldsafeshutdowncapabil'ity.587ftElevationTheMarch1983AppendixRsubmittaldemonstratedthatafireoccurringinFireZones62A,62Band62CwouldnotimpactonredundantsafeshutdowncapabilityastheUnit2chargingpump'sinFireZones63K,63Band63Cwouldstillbeavailable.Therefore,theonlypotentialimpactforfireinFireZones62A,62Band62Cwouldbeforfiretospreaddownthroughtheverticalchase/leakagedetectionboxesintoredundantRHRpumpcubiclessimultaneously,orupintotheRHRpumpheatexchangercubiclessimultaneously.Page9-188 TheprobabilityofafirespreadingdownintotheRHRpumpcubiclesisnegligible.Thisis,basedon.thenaturaltendencyforfiretospreadupwardsandoutwards.Whileoilf.ires,couldspreadtothelevelbelow,sixin.high,curbsatthe587-ftfloorelevationofeachvertical,chase/leakagedetection-boxopeningwillpreventthisfromoccurring.Thepotentialdoesexistforanuncontrolledfireinvolving46,655Btu/ftofcombustibleloadinginFireZones62A,62Band62CtospreadupwardsintotheRHRpumpheatexchangercubicles.However,theautomaticdetectionandpreactionsprinklersinthechargingpumpcubicleswillacttocontrolpostulated.f.iresuntilthefirebrigadearrivestocompleteextinguishment.Postulated,heat,andsmokeespreadupthe"verticalchases/leak"detection"boxes'ill,"therefore,bekepttoaminimum.Detrimentalimpact~-onredundanthotorcoldsafeshutdowncapability-is,-,therefore,',not;postulated.609ftElevationTheMarch1983Append'ixRsubmittaldemonstratedthatafireinoneheatexchangercubicleonthe609ftelevationoftheAuxiliaryBuildingwouldnotimpactonredundantsafeshutdown>>capabilityonthiselevationortheelevationabove.Theonlypotentialimpactforfireintheheatexchangercubiclesisfor,firetospreaddownintothechargingpumpcubiclesbelow.Thefixedandtransientcombustibleloadingsinthecubiclesareunder20,000Btu/ft.Oilisnotrequiredintheseareasfor2Page9-189 maintenancepurposes.Assuch,theonlypostulatedtransientcombustiblesareordinarycombustibles.Therefore,thepotentialforfiretospreaddowntheverticalchases/leakagedetectionboxesintothe,chargingpumpcubiclesisnotconsideredacredibleevent.ConclusionsBasedonthe"aboveeva'luation,reasonableassuranceisprovidedthatafireinthevicinityoftheverticalchases/leakagedetectionboxespassingthroughFireZones62A,62Band62CwouldnotimpairsafeshutdowncapabilitiesofD.C.Cookorimpactonthefullareasuppressionexemptionrequestfort'e573'ftelevation-of'heAuxiliaryBuilding.Inaddition,thisevaluationdoesnotadversely.impactonotherevaluationsorexemption.requestscontained.in'hisreport.Thebasesthatjustifytheconclusionaresummarizedasfollows:(1)ThecontainmentsprayandRHRpump.cubicles(FireZoneslA,1B,1CandlD)onthe573ftelevationhavefixedandtransientcombustibleloadingsofunder20,000Btu/ft.(Theactualfixedcombustibleloadingexistingatthistimeisunder6,242Btu/ft~).(2)ThecontainmentsprayandRHRheatexchangercubicles(FireZones44A,44B,44Cand44D)onthe609fte'levationhavefixeda~dtransientcombustibleloadingsofunder20,000Btu/ft(3)Thechargingpumpcubicles(FireZones62A,62Band62C)onthe587ftelevationhaveafixedcombustibleloadingofunder47,000Btu/ftPage9-190 (4)TheautomaticdetectionsystemsinthecontainmentsprayandRHRpumpcubicleswill,resultinpromptdetectionofincipientfireconditions,withresultantresponseofthefirebrigade.I(5)Theautomaticdetectionandpreactionsprinklersystemsinthechargingpumpcubicles'willact.tocontrol'nd/orextinguishpostulatedfirespriortothearrivalofthefirebrigade.(6)Thesixin.highcurbsat'he587-ftfloorelevationoftheaccessopeningsintoeachverticalchase/leakagedetectionboxwillpreventfirespreaddowntothecontainmentsprayandRHRpumpcubiclesbelow.TheRHRpumpsandheatexchangersarerequiredforcoldshutdownpurposesonly,withRHRpumppowercablerepairsandmanualoperationofvalvesintheheatexchanger.,cubiclesaddressedintheMarch1983AppendixRsubmittal,Section6.(8)Givenfirespreadtoororiginatinginthechargingpumpcubicle's,complete,alternateshutdowncapability,isavailableusingUnit2chargingpumpequipment.(9)Protectingtheboltedonsteelplatecovers,orpostingfirewatcheswhenremoved,would,not-significantlyenhancetheprotection-providedbytheexistingconfiguration.Page9-191 9.32BoundarEvaluationofFireZones63A,63Band63C~PuruseThepurposeofthisevaluationistoanalyzetheimpactofsteelplatecoveredaccessopeningstoverticalchases/leakagedetectionboxesinFireZones63A,638and63CthatconnecttheRHRandcontainmentspraypumpsbelowwiththeirheatexchangers"aboveon(1)redundantsafeshutdowncapabilityand(2)thefullareasuppressionexemptionrequestforthe573ftelevationoftheAuxiliaryBuilding.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedin-thisreport.ThecontainmentsprayandRHRpumpsarelocated-onthe573ftelevationof'theAuxiliary-'BuildinginFireZoneslE,1F,1Gand'H.Theheat'xchangersassociatedwiththesepumpsarelocatedon609ftelevationinFireZones44E,44F,44Gand44H.Thepipingbetweeneachpumpandits.heat..exchangerpassesthroughFireZon'es63A,63Band63Conthe587ftelevation.Thepipingforeachpump/heatexchangerisenclosedwithinaseparateconcretechase.OnechaseexistsinFireZone63A,twoinFireZone63B,andoneinFireZone63C.Asteelplatecover.normallyboltedontoonefaceofeachchaseprovidesaccessintothechaseforleakagedetectionpurposes.Thetopandbottomofeachchaseisnotsealed.Page9-192 SafeShutdownEuimentFireZones1EandlFcontaintheUnit1containmentspraypumpswiththeirassociatedheatexchangeslocatedinFireZones44Eand44F.Thisequipmentisnotrequiredforsafeshutdownpurposes.FireZones1Gand1Hcontainthe,Un,it1RHRpumpswith.theirassociatedheatexchangerslocatedinFireZones44Gand44H.Theyarerequiredforcoldshutdownpurposesonly.TheadequacyofRHRpumpseparationandmanualoperationsofvalvesintheheatexchangercubicleswereaddressedintheMarch1983AppendixRsubmittal.FireZones63A,63Band63CcontaintheUnit2chargingpumps.Givenafirethatinvolvesthesefirezones,completealternateshutdowncapabilityisprovidedoutsideoftheareausingUnit1equipment.FireProtectionEuimentAutomaticionizationdetectionsystemsareinstalledinFireZoneslE,1F,lGand1HandinFireZones63A,63Band63C.ApreactionsprinklersystemisinstalledinFireZones63A,63Band63C.Automaticdetectionandsuppressioncapabilitiesare.notprovidedinFireZones44E,44F,44Gand44H.Manualsuppressioncapabilitiesintheformofportableextinguishersandmanualhosestationsareavailableforuseinalllocations.FireHazardsAnalsisThefixedandtransientcombustibleloadinginFireZoneslE,1F,1Gand1Hisunder20,000Btu/ftforanequivalentfirePage9-193A "severityofunder15minutes.(Theactualfixedcombustible."loadingexistingatthistimeislessthan6063Btu/ftforan(equivalentfireseverityof4.5minutes.)Thefixedcombustible;,loadinginFireZones63A,63Band63Cislessthan47,000~<Btu/ftforanequivalentfireseverityofunder35minutes.p(Theactualcombustibleloadingandequivalentfireseverity<existingatthistimeare32,217Btu/ftand24minutes,respectively.)Theautomaticdetectionandpreact,ionsprinklersystemsinthesezoneswillacttolimittheimpactoftransientcombustibles,providedthattheyarenotof.,sucha,quantityto~overwhelmthesuppressionsystem.Thefixedandtransient>>combustibleloadinginFireZones44E,44F,44Gand44Hisunder,<20,000Btu/ftforanequivalentfireseverityof15minutes.,(Theactualfixedcombustible,loadingexistingatthistimeis,<.7,645Btu/ftforequivalentfireseverity5.7minutes.).573ftElevationTheRHRpumpsandheatexchangersarerequiredsolelyforcoldshutdownpurposes.TheMarch1983AppendixRsubmittaldemonstratedthatafireoccurringonthe573ftelevationoftheAuxiliaryBuildingwouldcapabilityoftheRHRpumps.Therefore,theonlypotentialnotimpactonredundantsafeshutdownimpactforfireonthe573ftelevationwbuldbeforfirespreadup.intothechargingpumpcubiclesand/ortheRHRheatexchangercubicles.Page9-194 Basedonafixedandtransientcombustibleloadingofunder20,OOQBtu/ftforanequivalentfireseverityof15minutes,thesteelplatecoverswouldhavetoberemovedfromtheverticalchases/leakagedetectionboxesinordertoimpactonthechargingpumpsinFireZones63A,63Band63C.Shouldfireenterthechargingpumpcubicles,.theexistingpreactionsprinklersystemwou]dacttomitigatefirespreadinthecubicles.Inaddition;completealternateshutdowncapabili'tyisavailableforafirethatspreadsintotheUnit2chargingpumpcubiclesfromtheUnit2RHRorcontainmentspraypumpcubiclesbelow.ShouldfirespreaduptheleakdetectionboxesfromtheRHRpumpcubiclesintotheRHRheatexchangercubicles,sufficient,timeexistsformanuallyoperatingany,requiredvalves;inthe,heatexchangerncubiclestoachievecoldshutdown'onditions.,,Assuch,'ireonthe573ftelevation.ofthe-AuxiliaryBuildingwillnotadverselyimpactonredundanthotorcoldsafeshutdowncapability.'87ftElevationTheMarch1983AppendixRsubmittaldemonstratedthatafireoccurringinFireZones63A,63Band63CwouldnotimpactonredundantsafeshutdowncapabilityastheUnit1chargingpumpsinFireZones62A,62Band62Cwouldstillbeavailable.Therefore,theonlypotentialimpactforfireinFireZones63A,63Band63Cwouldbeforfiretospreaddownthroughtheverticalchase/leakagedetectionboxesintoredundantRHRpumpcubiclessimultaneously,orupintotheRHRpumpheatexchangercubiclessimultaneously.Page9-195 forfiretospreadupwardsandoutwards.Whileoilfirescouldspreadtothelevelbelow,sixin.highcurbs.atthe587-ftfloorelevationofeachverticalchase/leakagedetectionboxopeningThepotentialdoesexistforssthan47,000Btu/ftofwillpreventthisfromoccurring.-anuncontrolledfireinvolvinglecombustibleloadinginFire'ones63A,63Band63CtospreadupwardsintotheRHRpumpheatexchangercubicles.However,theautomaticdetectionandpreactionsprinklersi>"the'"ch'a'rging"pumpcubicleswillacttocontrolpostulatedfiresuntilthefirebrigadearrives,to,complete.,extinguishment.Postulatedheatandsmoke'spreadup=,thevertical',chases/leakdetectionboxeswill,therefore,.bekeptto;a'inimum.='etrimentalimpactonredundanthotor.coldunsafe-."shutdown"capability'-is,therefore,notTheprobabilityofafirespreadingdownintotheRHRpumpcubiclesisnegligible.Thisisbasedonthenaturaltendencypostulated.609ftElevationTheMarch1983AppendixRsubmittaldemonstratedthat,afireinoneheatexchangercubicleonthe609ftelevationoftheAuxiliaryBuildingwouldnotimpactonredundantsafeshutdowncapabilityonthiselevationortheelevationabove.Theonlypotentialimpactforfireintheheatexchangercubiclesisforfiretospreaddownintothechargingpumpcubiclesbelow.Thefixedandtransientcombustibleloadingsinthecubiclesareunder20,000Btu/ftwithfixedcombustibleloading.OilisnotPage9-196 requiredintheseareasformaintenancepurposes.Assuch,theonlypostulatedtransientcombustiblesareordinarycombustibles~Therefore,thepotentialforfiretospreaddowntheverticalchases/leakagedetectionboxesintothechargingpumpcubiclesisnotconsideredacredibleevent.Conclusions'asedontheaboveevaluation,reasonableassuranceisprovidedthatafireinthevicinityoftheverticalchases/leakagedetectionboxespassingthroughFireZones63A,63Band63Cwould.not,impair'safeshutdowncapabilitiesofD.C.Cookorimpactonthefullareasuppressionexemptionrequestforthe573ftelevationoftheAuxiliaryBuilding.*.In.addition;<thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebasesthatjustifytheconclusion,are'summarizedas'ollows:(1)ThecontainmentsprayandRHRpumpcubicles(FireZoneslE,1F,1G-and1H)onthe573ftelevationhavefixedandtransient,combustibleloadingsofunder20,000Btu/ft.(Theactualfixedcombust',bleloadingexistingatthistimeisunder6063Btu/ft~).(2)ThecontainmentsprayandRHRheatexchangercubicles'<(FireZones44E,44F,44Gand44H)onthe609ftelevationhavefixeda~dtransientcombustibleloadingsofunder20,000Btu/ft.(Theactualfixedcombustibleloadingexistingatthistimeis7645Btu/ft~.)(3)Thechargingpumpcubicles(FireZones63A,63Band63C)onthe587ftelevationhaveafixedcombustibleloadingofunder47,000Btu/ftPage9-197 (4)TheautomaticdetectionsystemsinthecontainmentsprayandRHRpumpcubicleswillresultinpromptdetectionofincipientfireconditions,withresultantresponseofthefirebrigade.(5)Theautomaticdetectionandpreactionsprinklersystemsinthechargingpumpcubicleswillacttocontroland/orextinguishpostulatedfirespriortothearrivalofthefirebrigade.(6)Thesixin.highcurbsatthe587-ftflooroftheaccessopeningsintoeachverticalchase/leakagedetectionboxwillpreventfirespreaddowntothecontainmentsprayandRHRpumpcubiclesbelow.(7)TheRHRpumpsandheatexchangersarerequiredforcoldshutdownpurposesonly,withRHRpumppowercablerepairsandmanualoperationofvalvesintheheatexchangercubiclesaddressedintheMarch1983AppendixRsubmittal,Section6.(8)Givenfirespreadtoororiginatinginthechargingpumpcubicles,completealternateshutdowncapabilityisavailableusingUnit1charging'umpequipment.(9)Protectingtheboltedonsteelplatecovers,orpostingfirewatcheswhen'emoved,wouldnotsignificantlyenhancetheprotectionprovidedbytheexistingconfiguration.'age9-198 9.33FireZone6AtoFireZone138BBoundarEvaluation~~'~PuroseThepurposeofthisevaluationistoanalyzetheimpactofaverticalshaftconnecting.FireZone6A(the601ft.PipeTunnel)andFireZone138B(CVCSHoldUpYankRoomB)onredundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotimpactonotherevaluationsorexemptionrequestscontainedinthisreport.DescritionFireZone6A,is.locatedonthe601ftelevationoftheAuxiliaryBuilding.ItispartofalargerfireareathatincludesFireZones5,.6N,6M,6S,,61,,6'4A,.64B,,65A,and65B:Fire,Zone138Bis~~~~AuxiliaryBuilding.locatedon'he562ftelevation'ftheIt.is,partofalargerfireareathat*includesFireZones'1,1Athrough1H,136,137,138A,'and138C.A"concreteshaftconnectsthetwozonesoftheidentifiedfireareas.TheshaftoriginatesinFireZone6AviaagratelocatedinthefloorofthezoneatapproximatelycolumnlineHandthecenterlineoftheplant.Thisisthehighest'pointoftheshaft.TheshaftpassesverticallythroughFire'Zone6Mandistotallyenclosedinthiszone.TheshaftpenetratesthroughthefloorofFireZone6Matthe587ftelevationandterminatesatceilinglevelwithinFireZone138B.AnopeningatceilinglevelinFireZone138B,atapproximatelythe585ftelevation,isthelowestpointof,theshaft.Page9-199 SafeShutdownEuimentNeitherFireZone6AnorFireZone138Bcontainequipmentorcablesrequiredforsafeshutdownpurposes.FireProtectionEuimentNeitherFireZone6AnorFireZone138Bareprovidedwithautomaticdetection-orsuppression.FireHazardsAnalsis'ireZone6AandFireZone138Bhavecombustibleloadingsofunder13,000Btu/ftforequivalentfireseveritiesoflessthan10minutes.(Theactualfixedcombustibleloadingexistingatthistimeisnegligible.)Bothzonesarehighradiationareas*sthatdonotprovideaccesstootherplantareas.Therefore,thepotential'for'torageoftransientcombustiblematerialsinlf~~~eitherlocation.isconsiderednegligible.Neitherzone.containseither,safeshutdownequipmentorsignificantquantitiesof'combustiblematerials.Therefore,themainwayinwhichtheshaftcouldresultina.detrimentalimpactonsafeshutdowncapabilitywouldbeforittochannelfirebetweenvariouslevelsoftheAuxiliaryBuilding.Basedonthis,firewouldhavetooriginateonthe573ftelevationoftheAuxiliaryBuilding,penetrateintotheCVCSHoldUpTankareaandthenspreadup'theshaftfromFireZone138BintoFireZone6A.FromFireZone6A,firewouldthenhavetospreadoutintoeitherFireZones6Nor6Sonthe587ftelevation,orspreadoutintoFireZones44Nand44Sonthe609ftelevation.Page9-200 (NotethatexemptionrequestSection.7.13ofthisreportaddressesundamperedventilationductworkthatpassesthroughmultiplelevelsoftheAuxiliaryBuilding.ItwasdemonstratedinthisexemptionrequestthatfirecouldinvolveFireZone.l.onthe573ftelevation,FireZone6Nonthe587ftelevation,andFireZone44Nonthe609ftelevationwithoutimpactingonredundantsafeshutdowncapability.Therefore,firespreadinguptheshaftwouldhavetoinvolvebothFireZones6Nand,6Sonthe587ftelevationor.FireZones44Nand44Sonthe609ftelevationpriortoimpactingonredundantsafeshutdowncapability.)hInorderforfiretospreadintotheshaftlocatedinFireZone138B,afireofsufficientdurationandintensitymustoccurinthezonesadjacenttoFireZone138B.Theareainwhichthiszoneislocatedhasacombustibleloadingofunder20,000Btu/ftforanequivalentfireseverityofunder15minutes.(Theactualcombustibleloadingexistingatthistimeinthefireareaisapproximately4079Btu/ftandequivalentfireseverityofthreeminutes.)ThehighestconcentrationofcombustiblesintheareaexistsinFireZonel.TheadjacentCVCSHoldUpTankRooms,FireZones138Aand138C,havenegligibleactualcombustibleloadings.DuetothecombustibleloadingsinthefireareainwhichFireZone138Bislocated,alongwiththenegligiblequantitiesofcombustiblematerialinadjacentfirezones,afireofthemagnitudethatwouldberequiredtoimpactonredundantPage9-201 safeshutdownequipmentonupperelevationsisnotacredibleevent.Inaddition,anautomaticdetectionsystemisprovidedinFireZones1andlAthroughlHofthisfirearea.Theremaining.zonesofthefireareacontaincombustibleloadingofunder13,000Btu/ft.(Actualcombustibleloadingatthistimeis.negligible.)Firesthatinvolvecombustiblematerialsinthisfireareawillbepromptlydetectedandresultinthe'initiationoffirebrigadeactivities.ShouldanysmokefromafireonthiselevationfilterintoFireZone138BandspreaduptheshaftintoFireZone6A,itwillnotresultinfirespreadupintoFireZone6A(andhencepotentiallyintoFireZones6N,6S,44N,or44S)-duetothelack'ofcombustiblematerialstoigniteinFireZone6A.ConclusionBasedontheprecedingevaluation,reasonableassuranceisprovidedthatafireonthe573or.562ftelevationsoftheAuxiliaryBuildingwillnotspreaduptheshaftinFireZone138BtoFireZone6A.andspreadfromtheresoastoimpairredundantsafeshutdowncapabilities.Inaddition,reasonableassuranceisprovidedthatthisevaluationdoesnotimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)FireZones138Band6Ahavecombustibleloadingsofunder13,000Btu/ft,withnegligiblequantitiesoffixedcombustiblesexistingatthistime.Page9-202 (2)(3)FireZones138Band6Aarebothhighradiationareasthatdonotprovideaccesstootherplantlocations.IIThefireareainwhichFireZone138Bis)ocatedhasacombustibleloadingofunder20,000Btu/ft(4)FireZones138Band6Adonotcontainanysafeshutdownequipmentorcables;assuch,therewillbenoimpactonsafeshutdowncapabilityevenshouldfirespreadbetweenthetwozones.(5)Automaticdetectionisprovidedinallfirezonesonthe573ftelevationoftheAuxiliaryBuildingthatcontainfixedcombustiblematerials.(6)ShouldsmokeandheatfromafirefilterintoFireZone138BandspreaduptheshafttoFireZone6A,firewillnotignitein.thezoneduetothelackoffixedcombustiblematerialsinFireZone6A.Page9-203 9.34FireZone36toFireZone5BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofanundamperedductpenetratingthebarrierseparatingFireZone36fromFireZone5.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZone36islocatedonthe609ftelevationoftheAuxiliaryBuilding."Itispartofalargerfireareathat.:includesFireZones3,31,32,35,'8,49,50,51,52,69,106,'107,and146.FireZone5islocatedonthe587ftelevationof'theAuxiliaryBuilding.Itispartofalargerfireareathat~'includesFireZones6A,6N,6M,6S,61,64A,64B,65A,and65B.>.TheundamperedHVACductpassesthroughFireZone48intoFire'<<'one36andthenpenetratesthefloorofFireZone36,whichisconstructedof30in.thickconcrete.TheductthenpassesintoFireZone5.AirisexhaustedthroughtheductfromFireZones48and36throughFireZone5.SafeShutdownEuimentFireZone36doesnotcontainanysafeshutdownrelated"equipmentorcable.OtherzonesinthisareacontainingsafeshutdownequipmentorcablesareFireZones32,50,51,52,69,106and107.ThemodificationsproposedinSection8ofthisPage9-204 report,alongwithotherevaluationscontainedinthissection,providereasonableassurancethatonetrainof.safeshutdownsystemswillbeavailableincaseofafireinthisfirearea.FireZone5containssafeshutdownequipmentorcablesforbothUnits1and2.Otherzonesin=thisareacontainingsafeshutdownsystemsareFireZones6N,6M,and6S.FireZone6McontainsbothUnit1and2systems,FireZone6NcontainsprimarilyUnit1systems,'andFireZone6ScontainsprimarilyUnit2systems.ThemodificationsproposedinSection8ofthisreport,alongwith,,otherevaluat.ionscontainedinthissection,providereasonableassurancethatsafeshutdowncapabilitywillbeavailableincaseofafireoriginatinginthisfirearea.FireProtectionEuimentFireZone36isnot"providedwithautomaticdetectionorautomaticsuppression.capability.Otherzonesinthisareacontainingdetectionan'd/orsuppressioncapabilitiesareFireZones3(partialionizationdetectionanddrypilotsprinklers),32,51,and52(ionizationdetectionanddrypilotsprinklers);48(ionizationdetection),49,50,and69(ionizationdetection,andthermistordetectionwithmanualwatersprayforthecharcoalfilterunits),andFireZones106and107(heatdetection).IonizationsmokedetectionanddrypilotpreactionsprinklersystemsareprovidedinFireZone5,6N,6M,6S,64A,64B,65A,and65B.FireZone61isprovidedwithionizationdetection,whileFireZone6Aisnotprovi:dedwithdetectionorsuppressioncapability.Page9-205 FireHazardsAnalsisFireZone36hasacombustibleloadingofunder20,000-Btu/ftforanequivalentfireseverityoflessthan15minutes.(Theactualfixedcombustibleloadingexistingatthistimeis3,719Btu/ftforequivalentfireseverityof2.7minutes.)The2'fireareainwhichthiszoneislocatedhasatotalcombustibleloadingofunder33,000Btu/ftforanequivalentfireseverityof25minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare17,283Btu/ftand12.9minutes,respectively.)FireZone5hasacombustibleloadingofunder27,000Btu/ft2foranequivalentfireseverityof20minutes.(Theactualcombustibleloadingandequivalentfire"severityexistingatthistimeare11,299Btu/ftand8.5'minutes,respectively.')Theareain-whichthiszoneislocatedhasatotalcombustibleloadingofunder27,000Btu/ftforanequivalentfireseverityof20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare8,947Btu/ftand6.5minutes,respectively.)2FireZone36doesnotcontainsafeshutdownequipmentorcables;assuch,firecouldspreadintothezonefromFireZone5withoutimpactingonredundantsafeshutdowncapability.ForfireinFireZone5tobeabletoimpactonlocationscontainingsafeshutdownequipmentinthefireareawhichhousesFireZone36,firewouldhavetospreadupintothe633ftelevationoftheAuxiliaryBuilding.There.arethree.routessuchafirecouldpotentiallytake.Page9-206 OneroutewouldbeforforfiretotravelfromFireZone5toFireZone36onthe609ftelevation.ItwouldthenhavetotraveltoFireZone48onthe633ftelevationandthentoFireZone51.However,thisroutewouldrequirefiretospreaddirectlyintoFireZoneSlthroughthefueltransfercanalwhichrunsbetweenthetwozones.Thisisnotacredibleevent.Asecondroutewouldbe"forfiretotravelfromFireZone5toFireZone36onthe609ftelevation.ItwouldthenhavetotraveltoFireZone48onthe633ftelevation,uptoFireZone69onthe650ftelevation,andthendowntoFireZones49,50,51,52,106,and107onthe633ftelevation.Thisisnotacredibleeventdueto:(1)Thelowcombustibleloadingsthroughoutthesezones;(2)Thepresenceof,detectioninFireZones48,69,49,50Sl,52,106,and107;(3)ThepresenceofdrypilotsprinklersinFireZones51and52;and(4)Theci'rcuitouspaththatfiremusttaketospreadbetweentheseidentifiedfirezones.Thethirdrouteisfor.firetospreadfromFireZone5toFireZones36and32onthe609ftelevation.FromFireZone32,itwouldhavetospreaddirectlyintoFireZone69onthe650ftelevationandthendowntoFireZones49,50,51,52,106,and107onthe633ftelevation.Thisisnotacredibleeventdueto:(1)Thelowcombustibleloadingsthroughoutthesezones;(2)ThepresenceofdetectioninFireZones32,69,49,50,51,52,106,and107;Page9-207 (3)ThepresenceofdrypilotsprinklersinFireZones32,51and52;and(4)Thecircuitouspaththatfiremusttaketospreadbetweentheseidentifiedfirezones.Thesamecircuitouspath'sexistforfiretotravelfromFireZones49,50,51,52,106,and107onthe633ftelevationoftheAuxiliaryBuildingtoFireZones5,6N,6M,'and6Sonthethe587ftelevation.Inaddition,thezonesonthe587ftelevationareallprovidedwithionizationdetectionanddrypilotsprinklersystems,withtheexceptionofFireZone61,whichisonlyprovidedwithanionizationdetectionsystem.Therefore,firespreadbetweentheidentifiedzoneisnotacredibleevent.ConclusionBasedontheprecedingevaluation,reasonableassuranceisprovidedthattheundamperedventilationductpassingthroughthebarrierseparatingFireZones5and36willnotimpactoneitherredundantsafeshutdowncapabilityorotherevaluationsorexemptionsincludedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)FireZgne36hasacombustibleloadingofunder20,000Btu/ftforanequivalentfireseverityof15minutes.(Theactualfixedcorn)ustibleloadingexistingatthistimeis3,719Btu/ft.)Thefireareainwhichthis-zoneislocatedhasatotalcombustibleloadingofunder33,000Btu/ftforanequivalentfireseverityof25minutes.(2)FireZone5hasacombustibleloadingofunder27,000Btu/ft2foranequivalentfireseverityof20minutes.Theareainwhichthiszoneislocatedhasatotalcombustibleloadingofunder27,000Btu/ft2foranequivalentfireseverityof20minutes.Page9-208 (3)Thefireseveritiesexistinginthezonesthroughwhichfiremusttraveltoreachzonescontainingsafeshutdownequipmentarenotsufficienttoovercomethecircuitouspathswhichfiremusttake.(4)Automaticdetectionand/orautomaticsuppressioncapabilitiesareprovidedinenoughoftheinterveningfirezonesbetweenzonescontainingsafeshutdownequipmentthatfirebrigaderesponsewilloccurwellbeforeredundantsafeshutdowncapabilitiesarejeopardized.Page9-209 9.35PireZone108toFireZone33ABoundarEvaluat'ion~PuroeeThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofunsealedpenetrationsand8anundamperedinstallationductinthebarrierseparatingFireZone108fromFire'one33A.Inaddition,thisevaluationdoesInotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZone108istheUnit1WestMainSteamVal'veEnclosurelocatedinthewestmainsteamvalvehousewhichalsoincludesF~ireZone110.FireZone108rises,from"approximatelythe624ftelevation-tothe682:ftelevation,'ithFireZone110joiningthiszonethrough,a'haft.-openingin'heflooratthe624ftelevation.Thesetwozonesarepartofalargerfireareathati'ncludestheUnit1andUnit2Turbine.Buildings,theUnit2westmainsteamvalvehouse,theScreenHouse,<>andtheServiceBuilding.FireZone33Aislocatedonthe612ftelevationoftheAuxiliaryBuilding.Itis'partofalargerfireareathati'ncludesFireZones33,33B,and105'.FireZone33Arisesfromthe612ftelevationtotheroofatthe644ftelevation.ThenorthwallofFireZone108interfaceswiththesouthwallofFireZone33Afromapproximatelythe624ftelevationtojustbelowtheroofatthe644ftelevation.TwomainsteamlinePage9-210 pipespassatananglethrougha15ftwideby6fthighopening~~inthisinterface.Eachpipeisapproximately42in.indiameterwith8in.ofinsulation.Inaddition,-thepipesaredesignedsuchthatappr'oximately6in.ofmovementisexpectedwhenthepipesgofromthehottocoldconditions.ThereareseveralotherunsealedpenetrationsthroughthisboundaryinterfaceincludinganundamperedHVACexhaustduct;however,theopeningprovidedforthetwomainsteampipesisthelargestoftheunprotectedopeningsandistheworstcaseboundingsituation.Safe'hutdownEuimentFireZones33A,33B,and105containnosafeshutdownequipment.Fire,Zone33,contains,thefollowingsafeshutdowneequipmentandassociatedcables:(1)Unit1steamgenerators1and4PORVs;(2)'teamgenerators1and'auxiliaryfeedwatersupplyvalves;t(3)Steamgenerators1and4mainsteamstopvalves,,<<(MSSVs);(4)Unit1IocalShutdownIndicationpanelsLSI-1andLSI-5;(5)Steamgenerators1and4safetyreliefvalves;and(6)Steamgenerators1and4pressuretransmitters.ThecablingfortheUnit1'steamgenerators1and4PORVsarealsoroutedthrough,andlocatedinFireZone33A.FireZone108containsthefollowingsafeshutdownequipmentandtheirassociatedcables:Page.9-211 (1)Unit1steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and3;(3)Steamgenerators2and3mainsteamstop.valves(MSSVs);(4)Steamgenerators2and3safetyreliefvalves;and(5)Unit1turbinedrivenAFWpumpsteamsupplyisolationvalves..FireProtectionEuimentFireZones108and110arenotprovidedwithautomaticdetectionorautomaticsuppressioncapability.FireZone33Aisprovidedwithautomatic-detectioncapability,asareFireZones33and33Binthesamefire'area.Athermistorandmanualwaterspraysuppressionsystem..areprovidedforthecharcoal'filteru'nitinFireZone33A.FireZone105isprovidedwithanautomaticwetpipesprinklersystem.FireHazardsAnalsisTheseismicgapexemptionrequestcontainedinSection7.13ofthisreportdemonstratedthatfirecouldinvolveFireZones33A,33B,and108withoutimpactingonredundantsafeshutdowncapability.Atworst,thiswouldresultinlossofsteamgenerators2and'3inFireZone108alongwiththePORVsforsteamgenerators'and4inFireZone33.However,thesevalvescanbemanuallyoperatedinFireZone33.ThefixedsuppressionexemptionrequestinSection7.8ofthisreportdemonstratedthatafireoriginatingineitherFireZone33,FireZone33A,orFireZone33BwillnotimpactonPage9-212 Section9.28ofthisreport,combiningFireArea105withFireZones33,33A,and33BwillnotimpactoneithersafeshutdowncapabilityorthefixedsuppressionexemptionrequestforFireZones33,33A,and33B.TheonlypotentialimpactonsafeshutdowncapabilitythatmustbeaddressedistheprobabilityforfiretospreadtoFireZones33and108simultaneously.FireZone108hasacombustibleloadingoflessthan27,000Btu/ftwithanequivalentfireseverityof20minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare10,187Btu/ftand7.6minutes,respectively.)Shouldanytransientcombustiblesbe,broughtintothecombustibleloadingcouldpotentiallyincreasetoapproximately,40,000Btu/ft.Thiscouldresultinamaximumequivalentfireseverityofapproximately30minutes.PostulatedfiresoccurringinFireZone108wouldtendtospreadupwardsinthezonetowardsthe682ftelevationasopposedtospreadingdownthrough,theunsealedpenetrationsatthe635to644ftelevationsintoFireZone33A.ThelackofcombustibleliquidseitherexistingorrequiredinFireZone108reinforcesthisassumedpathoffirespread.Theproductsofcombustionfromsuchafirewouldhavetobankdownapproximately50ftpriortoenteringFireZone33A.Givenatotalcombustibleloadingof40;000Btu/ft,thisisnota'redibleevent.Therefore,afireoriginatinginFireZone108thatspreadsdownintoFireZone33AandthenintoFireZone33isnotacredibleevent.Page9-213 ThefireareainwhichFireZones33,33A,33B,and105arelocatedhasacombustibleloadingandequivalentfireseverityofunder27,000Btu/ftand20minutesrespectively.(Theactualfixedcombustibleloadingand"equivalentfireseverityexisting-atthistimeisapproximately11,530Btu/ftand8.5minutes2respectively.)ThemajorityofthisloadingexistsinFireZone105,whichisprotectedbyanautomaticwetpipesprinklersystem.Thecombust.ibleloadingsand'quivalentfireseveritiesinFireZones33and33Aareunder27,000Btu/ftand20minutes(withactualvaluesoflessthan10,840Btu/ftand8minuteseach).InorderforfiretoimpactonbothFireZone108andFireZone33simultaneously,itwouldhavetooriginateinFireZone33Aor.33B.Theproductsofcombustionwouldthenhaveto'spreadintobothfirezonesinordertoimpactonredundantsafeshutdowncapability.Thefollowingfactorsacttomitigatetheprobabilityofthisoccurring:(1)FireZone33Aisapproximately170ftinlength;(2)Anautomaticdetectionsystem-isprovidedthroughoutFireZones33,33A,and33B,includingautomaticthermistordetectionandmanualwaterspraysuppressionforthecharcoalfilterunitinFireZone33A,therebyensuringpromptfirebrigaderesponseandinitiationofmanualfirefightingactivities;(3)FireZones33,33A,and108h~veapproximatevolumesof70,720,101,840and42,159ft,respectively;'I(4)WhilethereisacontinuityofcombustiblesbetweenFireZones33and33Athatcouldresultinfiredamageinbothfirezones,thecontinuityofcombustiblesdoes!Page9-2144 notextendintoFireZone108.Therefore,firedamageinFireZone108willhavetooccurasaresultofhotcombustiblegasesspreadingintothezone;and(5)Duetothe170ftofspatialseparationbetweenFireZones108and33,alongwiththelargevolumesofFireZones33,33A,and108,productsofcombustionthatdotraversethisroutewillbesufficientlydispersedandcooledsoasnottoposeahazardtoFireZones108and33simultaneously.providedthatafirewillnotimpactonredundantsafeshutdowncapabilitylocatedinFireZones108,33A,and33.Inaddition,impactonotherevaluationsortheevaluationdoesnotadverselyexemptionrequestscontainedinthisreport.,Thebaseswhichjustifythese.conclusionsaresumm'arizedasfollows:(1)FireZgne108hasacombustibleloadingofunder27,000Btu/ft.,ShouldanytransientcombustiblesbebroughtintoFireZone108,thecombustibleloadcou/dpotentiallyincreasetoapproximately40,000Btu/ftThiscouldresultinamaximumequivalentfireseverityof30minutes.Basedontheseconsiderations,the'robabilityoffireadverselyimpactingonFireZones108and33simultaneouslyisnotacredibleevent.ConclusionBasedontheprecedingevaluation,reasonableassuranceis(2)ThefireareainwhichFireZones33,33A,33B,and105arelocatedhasacombustibleloadingandequivalentfireseverityofunder27,000Btu/ftand20minutesrespectively.(Theactualfixedcombustibleloadingandequivalentfireseverityexi~tingatthistimeisapproximately11,530Btu/ftand8.5minutes,respectively.)(3)ThemajorityofthisloadingexistsinFireZone105,whichisprotectedbyanautomaticwetpipesprinklersystem.Page9-215 (4)ThecombustibleloadingsandequivalentfireseveritiesinFireZones33and33Aareunder27,000Btu/ft2and20minutes(withactualvaluesoflessthan10,840Btu/ft2and8minuteseach).(5)TheseismicgapexemptionrequestcontainedinSection7.13ofthisreportdemonstratedthatfirecouldinvolveFireZones33A,33B,and108withoutimpactingonredundantsafeshutdowncapability.(6)ThefixedsuppressionexemptionrequestinSection7.8ofthisreportdemonstratedthatafireoriginatingineitherFireZone33,FireZone33A,orFireZone33Bwillnotimpactonredundantsafeshutdowncapability.(7)AnautomaticdetectionsystemisprovidedthroughoutFireZones33,33A,and33B,therebyensuringpromptfirebrigaderesponseandinitiationofmanualfirefightingactivities;(8)FireZones33,33A,and108haveapproximatevolumesof70,720,101,840,and42,159ft3,respectively;(9)Duetothe170ftofspatialseparationbetweenFireZones108and33,alongwiththelargevolumesofFireZones33,.33A,and108,productsofcombustionthatdotraversethisroutewillbesufficientlydispersedandcooledsoasnottoposeahazardtoFireZones108and33simultaneously.Page9-216 ThecablingfortheUnit2steamgenerators1and4PORVsarealsoroutedthroughandlocatedinFireZone34A.FireZone109containsthefollowingsafeshutdownequipmentandtheirassociatedcables:(1)Unit2steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and3;(3)Steamgenerators2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators2and3safetyreliefvalves;and(5)Unit2turbinedrivenAFWpumpsteamsupplyisolationvalves.FireProtectionEuimentFireZones109andillarenotprovidedwithautomaticdetectionorautomaticsuppressioncapability.FireZone34Aisprovidedwithautomaticdetectioncapability,asareFireZones34and34Binthesamefire,area.AthermistordetectionandmanualwaterspraysuppressionsystemareprovidedforthecharcoalfilterunitinFireZone34A.FireHazardsAnalsisTheseismicgapexemptionrequestcontainedinSect'ion7.13ofthisreportdemonstratedthatfirecouldinvolveFireZones34A,34B,and109withoutimpactingonredundantsafeshutdowncapability.Atworst,thiswouldresultinlossofsteamgenerators2and3inFireZone109alongwiththePORVsforsteamgenerators1and4inFireZone34.However,thesevalvescanbemanuallyoperatedinFireZone34.Page9-219 ThefixedsuppressionexemptionrequestinSection7.9of,thisreportdemonstratedthatafireoriginatingineither"Fire,Zone34,FireZone34A,orFireZone34Bwillnotimpacton.;redundantsafeshutdowncapability.Theonlypotentialimpacton.;safeshutdowncapabilitythatmustbeaddressedisthe~probabilityforfiretospreadtoFireZones34and109-'simultaneously.FireZone109hasacombustibleloadingoflessthan33,000Btu/ftwithequivalentfireseverityof25minutes.ShouldanytransientcombustiblesbebroughtintoFireZone109,the...combustiblecouldpotentiallyincreasetoapproximately47,000,Btu/ft.Thiscouldresultinamaximumequivalentfireseverity'ofunder35minutes.Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare15,872Btu/ft.and11.8minutes,respectively.PostulatedfiresoccurringinFireZone109wouldtendtospreadupwardsinthezonetowardsthe682ftelevationasopposedtospreadingdownthroughtheunsealedpenetrationsatthe635to644ftelevationsintoFireZone34A.ThelackofcombustibleliquidseitherexistingorrequiredinFireZone109'-reinforcesthisassumedpathoffirespread.Theproductsofcombustionfromsuchafirewouldhavetobankdownapproximately50ftpriortoenteringFireZone34A.Givenatotalcombustibleloadingofunder47,000Btu/ftthisisnotacredible,event.Therefore,afireoriginatinginFireZone109thatspreadsdownintoFireZone34Aandthenintoevent.FireZone34isnotacrediblePage9-220 ThefireareainwhichFireZones34,34A,and34Barelocatedhasacombustibleloadingandequivalentfireseverityofapproximately20,000Btu/ft2and15minutesrespectively.(Theactualfixedcombustibleloadingandequivalentfireseverityexistingatthistimeislessthan5,909Btu/ft2and4.3minutesrespectively.)ThecombustibleloadingsandequivalentfireseveritiesinFireZones34and34Aareunder20,000Btu/ft2and15minutes(withactualvaluesoflessthan5,937Btu/ft2and4.5minuteseach).InorderforfiretoimpactonbothFireZone109andFireZone34simultaneously,itwouldhavetooriginateinFireZonezonesinorderintobothfire~~shutdowncapability.Thefollowingprobabilityofthisoccurring:toimpactfactors34Aor34B.Theproductsofcombustionwouldthenhavetospreadonredundantsafeacttomitigatethe(1)FireZone34Aisapproximately170ftinlength;(2)AnautomaticdetectionsystemisprovidedthxoughoutFireZones34,34A,and34B,includingautomaticthermistordetectionandmanualwaterspraysuppressionforthecharcoalfilterunitinFireZone34A,therebyensuringpromptfirebrigaderesponseandinitiationofmanualfirefightingactivities;(3)FireZones34,34A,and109haveapproximatevolumesof'.70,720,101,840and42,159ft3.,respectively;(4)WhilethereisacontinuityofcombustiblesbetweenFireZones34and34Athatcouldresultinfiredamageinbothfirezones,thecontinuityofcombustiblesdoesnotextendintoFireZone109.Therefore,firedamageinFireZone109willhavetooccurasaresultofhotcombustiblegasesspreadingintothezone;andPage9-221 (5)Duetothe170ftofspatialseparationbetweenFireZones109and34,alongwiththelargevolumesofFireZones34,34A,and109,productsofcombustionthatdotraversethisroutewillbesufficientlydispersedandcooledsoasnottoposeahazardtoFireZones109and34simultaneously.Basedontheseconsiderations,theprobabilityoffireadverselyimpactingonFireZones109and34simultaneouslyisnotacredibleevent.ConclusionBasedontheprecedingevaluation,reasonableassuranceisprovidedthatafirewillnotimpactonredundantsafeshutdown0capabilitylocatedinFireZones109,34A,and34.Inaddition,theevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontained'nthisreport.Thebaseswhichjustifytheseconclusionsaresummarizedasfollows:(1)FireZgne109hasacombustibleloadingofunder33,000Btu/ft.Thecombustiblecouldpotentiallyincreasetoapproximately47,000Btu/ft2.Thiscouldresultinamaximumequivalent-fireseverityofunder35,minutes.(2)(3)ThefireareainwhichFireZones34,34A,and34Barelocatedhasacombustibleloadingandequivalentfireseverityofapproximately20000Btu/ft2and.15minutesrespectively.(Theactualfixedcombustibleloadingandequivalentfireseverityexistingatthistimeislessthan5909Btu/ft2and4.3minutesrespectively.)ThecombustibleloadingsandequivalentfireseveritiesinFireZones34and34Aareunder20,000Btu/ft2and15minutes(withactualvaluesoflessthan5937-Btu/ft2and4.5minuteseach).(4)TheseismicgapexemptionrequestcontainedinSection7.13ofthisreportdemonstratedthatfirecouldinvolveFireZones34A,34B,and109withoutimpactingonredundantsafeshutdowncapability.Page9-222 (5)(6)ThefixedsuppressionexemptionrequestinSection7.9ofthisreportdemonstratedthatafireoriginatingineitherFireZone34,FireZone34A,orFireZone34Bwillnotimpactonredundantsafeshutdowncapability.Anautomat.icdetectionsystemisprovidedthroughoutFireZones34,.34A,and34B,therebyensuringpromptf.irebrigaderesponseandinitiationofmanualfirefightin'gactivities;(7)=FireZones34,34A,and109haveapproximatevolumesof70,720,101,840,and42,159ft3,respectively;(8)Duetothe170ftofspatialseparationbetweenFireZones109and34,alongwiththelargevolumesofFireZones34,34A,and109,productsofcombustionthatdotraversethisroutewillbesufficientlydispersedandcooledsoasnottoposeahazardtoFireZones109and34simultaneously.Page9-223 9.37FireZone32toFireZone5BoundarEvaluation.~PuruseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityof:(1)anundamperedduct;(2)anunrateddoor;and(3).severalminorunsealedpenetrationsinthewallandceilingof'stairwayenclosureseparatingFireZone'5fromFireZone32.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.*FireZone32islocatedonthe609ftelevationoftheAuxiliaryBuilding.Itisopenfromthe609ftelevationuptoPtheroofoftheAuxiliaryBuilding,whichisatapproximatelythe705ftelevation.Itispartofalargerfireareathatinc'ludesFireZones3,31,35',36,48,49,50;51,52,69,106,107,and146.FireZone5islocatedonthe587ft'levationoftheAuxiliaryBuilding.ItispartofalargerfireareathatincludesFireZones6A,6N,6M,6S,61,64A,64B,65A,and65B.AnopenstairwayinthenortheastcornerofFireZone5providesaccessuptoFireZone32.Atthetopofthestairsabovethe609ftelevation,anenclosureconstructedof8in.thickconcreteblock(onthenorth,east,andwestsidesonly)witha5in.thickpouredconcreteceilingisprovided.Theconfigurationofthebarriersresultsintheopenstairwayportionofthe609ftelevationbeingincludedaspartofFireZone5onthe587ftelevation.Page9-224 AnunratedhollowmetaldoorprovidesaccessfromFireZone5toFireZone32fromthetopofthestairwaythroughtheeastwallofthestairwayenclosure.AventilationductthatsuppliesoutsideairthroughFireZone32tothecharcoalfilterunitsinFireZone5penetratestheceilingofthestairwayenclosureandisnotprovidedwithafiredamper.A1-in.gapexistsbetweentheductandtheceilingwhichisnotsealed.Inaddition,anunsealedgapexistsaroundastandpipepenetratingthroughtheeastwallofthestairwayenclosuretoFireZone32.SafeShutdownEuimentFireZone32doesnotcontainanysafeshutdownequipmentbutdoescontainsafeshutdowncablesassociatedwithtwooftheUnit1safetyinjectionaccumulatorvalves.Otherzonesinthisareacontainingsafeshutdownequipmeztand/or:cablesareFireZones50,51,52,69,106,and107..ThemodificationsproposedinSection8ofthisreport,alongwithotherevaluationscontainedinthissection,providereasonableassurancethatonetrainofsafeshutdownsystemswillbeavailableincaseofafireinthisfirearea.FireZone5containssafeshutdownequipmentorcablesforbothUnits1and2.OtherzonesinthisareacontainingsafeEshutdownsystemsareFireZones6N,6M,and6S.FireZone6McontainsbothUnit1and2systems,FireZone6NcontainsprimarilyUnit1systems,andFireZone6ScontainsprimarilyPage9-225 Unit2systems.ThemodificationsproposedinSection8ofthisreport,alongwithotherevaluationscontainedinthissection,.,providereasonableassurancethatsafeshutdowncapabilitywill'Ibeavailableincaseofafireoriginatinginthisfirearea.FireProtectionEuimentFireZone32isprovidedwithautomaticdetectionanddrypilotpreactionsprinklersattheceilingofthe'50ftelevation.Otherzonesinthisareacontainingdetectionand/orsuppressioncapabilitiesareFireZones3(partialionizationdetectionanddry,pilotsprinklers),5l,.and52(ionization~detectionanddrypilot'prinklers),48(ionizationdetection),...49,50,and69(ionizationdetection,andthermistordetectorswithmanualwatersprayforthecharcoalfilterunits),andFire'ones106and107(heatdetection).Ionizationsmokedetectionanddrypilotpreactionsprinkleril~systemsareprovidedinFireZone5,6N,6M,6S,64A,64B,65A,and65B.FireZone61isprovidedwithionizationdetection,whileFireZone6Aisnotprovidedwithdetectionorsuppressioncapability.FireHazardsAnalsisFireZone32hasacombustibleloadingofunder40,000Btu/ftforanequivalentfireseverityoflessthan30minutes.(Theactualfixedcombustibleloadingandequivalentfireseverityexistingatthistimearelessthan23,311Btu/ftand117.4minutes,respectively).ThefireareainwhichthiszoneisPage9-226 locatedhasatotalcombustibleloadingoflessthan33,000Btu/ft2foranequivalentfireseverityof25minutes(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimearea17,283Btu/ftand12.9minutes,respectively.)FireZone5hasacombustibleloadingofunder27,000Btu/ftfor2anequivalentfireseverityof20minutes.(Theactualcombusti'bleloadingandequivalentfireseverityexistingatthis.timearea11,229Btu/ftand8.5minuteseach.)Theareainwhichthiszoneislocatedhasatotalcombustibleloadingofunder27,000Btu/ftforanequivalentfireseverityof20minutes.(Theactualcombustibleloadingand'equivalentfireseverityexistingatthistimeare8947Btu/ftand6.5minutes2respectively.)FireZone32doesnotcontainsafeshutdownequipmentorcables;assuch,firecouldspreadintothezonefromFireZone..5withoutimpactingonredundantsafeshutdowncapability.Forfirein'FireZone5tobeabletoimpactonlocationscontainingsafeshutdownequipmentinthefireareawhichhousesFireZone32,firewouldhaveto'preadupintothe633ftelevationoftheAuxiliaryBuildingandimpactonFireZones50,51,52,106,or107.Therearethreeroutessuchafirecouldpotentiallytake.OneroutewouldbeforforfiretotravelfromFireZone5toFireZone32throughtheunrateddoor,undamperedductorunsealedgapsaroundtheductandstandpipe.penetrations.ItwouldthenhavetotravelintoFireZone48onthe633ftPage9-227 elevationthroughanunrateddoorandthenthroughthewestwallofFireZone48directlyinto,FireZone51.However,thisroute.wouldrequirefiretospreaddirectlyintoFireZone51throughthefueltransfercanalwhichrunsbetweenthetwozones.Thisisnotacredibleevent.Asecondroutewouldbefor:firetotravelfromFireZone5toFireZone32onthe609ftelevation.ItwouldthenhavetotravelintoFire-Zone48:onthe633ftelevationthroughanunrateddoor,uptoFireZone69onthe650ftelevation,andthendowntoFireZones49,50,51,52,106,and107onthe633"ftelevation.Thisisnotacredibleeventdueto:(1)Thelowcombustibleloadingsthroughoutthesezones;(2)Thepresence'ofdetectioninFireZones48,69,49,50,51,52,106,and107;(3)ThepresenceofdrypilotsprinklersinFireZones51and52;and(4)Thecircuitouspaththatfiremusttaketospreadbetweentheseidentifiedfirezones.4Thethirdrouteisforfiretospread.fromFireZone5toFireZone32onthe609ftelevation.Thef'irewouldthenhavetospreaduptothe650ftelevationofFireZone32,spreaddirectlyintoFireZone69onthe650ftelevation,andthenspreaddowntoFireZones49,50,51,52,106,and107onthe633ftelevatian.Thisisnotacredibleeventdueto:(1)Thelowcombustibleloadingsthroughoutthesezones;(2)ThepresenceofdetectioninFireZones32,69,49,50,51,52,106,and107;Page9-228 (3)ThepresenceofdrypilotsprinklersinFireZones32,51and52;and(4)Thecircuitouspaththatfiremusttaketospreadbetweentheseidentifiedfirezones.Thesamecircuitouspathsexistforfireto.travelfromFireZones49,50,51,52,106,and107onthe633ftelevationoftheAuxiliaryBuildingtoFireZones5,6N,6M,and6Sonthethe587ftelevation.Inaddition,thezonesonthe587ftelevationareallprovidedwithionizationdetectionanddrypilotsprinklersystems,withtheexceptionofFireZone61,whichisonlyprovidedwithanionizationspreadbetweenthei'dentif'iedConclusiondetectionsystem.Therefore,firezonesisnota'credibleevent.Basedontheprecedingevaluation,reasonableassuranceisprovidedthattheundamperedventilationduct,unrateddoor,andunsealedpenetrationsthroughthebarriersseparatingFireZones5and32willnotimpactoneitherredundantsafeshutdowncapability.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)FireZ~ne32hasacombustibleloadingofunder40,000Btu/ftforanequivalentfireseverityof30minutes.(Theactualfixedcombustibleloadingexistingatthistimeislessthan'3,311Btu/ft2.)Thefireareainwhichthiszoneislocatedhasatotalcombustibleloadingof33,000Btu/ft2foranequivalentfireseverityof25minutes.Page9-229 (2)FireZone5hasacombustibleloadingofunder27,000Btu/ft2foranequivalentfireseverityof20minutes.Theareainwhichthiszoneislocatedhasatotalcombustibleloadingofunder27,000Btu/ft2foranequivalentfireseverityof20minutes.(3)Thefireseveritiesexistinginthezonesthroughwhichfiremusttraveltoreachzonescontainingsafeshutdownequipmentarenotsufficienttoovercomethecircuitouspathswhichfiremusttake.(4)Automaticdetectionand/orautomaticsuppressioncapabilitiesareprovidedinenoughoftheinterveningfirezonesthatfirebrigaderesponsewilloccurwellbeforeredundantsafeshutdowncapabilitiesarejeopardized.Page9-230 9.38FireZone69toFireZones108and109BoundarEvaluation~PuroseThepurposeofthisevaluationistoanalyzetheimpactonredundantsafeshutdowncapabilityofundamperedcontainmentinstrumentationroomexhaustductworkthatpenetratethebarriersseparatingFireZone69fromFireZones108and109.Inaddition,thepurposeofthisevaluationistodemonstratethatitdoesnotadverselyimpactoneithertheexemptionsortechnicalevaluationsappearinginSections7and9ofthisreport.FireZone69islocatedonthe650ftelevationoftheAuxiliaryBuilding.ItispartofalargerfireareathatCincludes3,31,.32,35,36,48,49,50,51,52,106,107,and146.FireZones108and109riseverticallyfromthe624ftelevationtotheroofofeachunits'estMainSteamValveHouse.ThetwozonesarepartofalargerfireareathatincludestheUnit1andUnit2TurbineBuildings,theServiceBuilding,theScreenHouse,andtheUnit1andUnit2WestMainSteamValveEnclosures.ContainmentinstrumentationroomexhaustductworkrisesupfromtheroofoftheInstrumentationRoomsinFireZones33Aand34AandentersFireZones108and109.TheductworkpassesthroughFireZones108and109intoFireZone69.One14in.diameterductpenetratesfromFireZone108intoFireZone69,CwithasimilarductpenetratingfromFireZone109intoFire.Zone.Page9-231 69.TheductworkthenproceedstotheplantventsystempassingthroughtheroofofFireZone69totheexterior.FiredampersarenotprovidedwheretheductworkpenetratesFireZones108and109fromFireZone33A,34A,or69.SafeShutdownEuimentFireZone69containstheUnit1andUnit2CCWsurgetankmanualisolationvalves(1-CCW-214,1-CCW-220,2-CCW-214,2-CCW-220)..FireZone69alsocontainscablesassociatedwiththefollowingUnit1components(seeTable4-3andSection4.4.5):(1)twopressurizerPORVs;(2)twopressurizerblockvalves;(3)tworeactorheadventvalves;(4)twopost-accidentsamplingvalves;and(5)safetyinjectionaccumulatorvalves.Otherfirezonesthatdocontainsafeshutdowncableand/or'equipmentintheareainwhichFireZone69islocatedareFireZones32,Fire50,51,52,106,and107.Zone108containsthefollowingsafeshutdownequipmentandtheirassociatedcables:.(1)Unit1steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and3;(3)Steam'enerators2and3mainsteamstopvalves(MSSVs);Page9-232 (4)Steamgenerators2and3safetyreliefvalves;and(5)Unit1turbinedrivenAFWpumpsteamsupplyisolationvalves.FireZone109containsthefollowingsafeshutdownequipmentandtheirassociatedcables:(1)Unit2steamgenerators2and3PORVs;(2)Pressuretransmittersforsteamgenerators2and3;(3)Steamgenerators2and3mainsteamstopvalves(MSSVs);(4)Steamgenerators2and3safetyreliefvalves;and(5)Unit2turbinedrivenAFWpumpsteamsupplyisolationvalves.RedundantsafeshutdowncapabilityisavailableforFireZones108,109and69outsideofthefireareainwhichtheyarelocated.Therefore,firecouldinvolveFireZones69,108,and109withoutimpactingonredundantsafeshutdowncapability..FireProtectionEuimentFireZone69isprovidedwithautomaticdetectioncapabilityandmanualwaterspraysuppressionfortheAHVsinthezone.NeitherFireZone108or109containautomaticdetectionorsuppressioncapability.FireHazardsAnalsisFireZones108and109haveacombustibleloadingofunder27,000and33,000Btu/ftforanequivalentfireseverityofunder'0and25minutes,respectively.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeare10,187Btu/ftand2.2minutesforFireZone108,and15,872Page9-233 Btu/ftand11.8minutesforFireZone109,respectively.)Should;."transientcombustiblesbebroughtintothezone,thecombustibleloadingcouldincreaseto40,000Btu/ftforFireZone108,and-47,000Btu/ftforFireZone109.Thiscouldresultinan.equivalentfireseverityof30and35minutes,respectively.FireZone69hasacombustibleloadingofunder20,000~Btu/ftforanequivalentfireseverityofunder15minutes.(Theactualcombustibleloadingandequivalentfireseverityexistingatthistimeislessthan2998Btu/ftand2.2minutes,respectively).Theareainwhichthiszoneislocatedhasan,averagecombustibleloadingoflessthan33,000Btu/ftforanequivalentfireseverityof25minutes.(Theactualcombustible~.loadingandequivalentfireseverityexistingatthistimeare,17,283Btu/ftand12.9minutes,respectively).'TheseismicgapexemptionrequestcontainedinSection7.14ofthisreportdemons'tratedthatfirecouldinvolveFireZones49.and108orFireZones50and109withoutimpactingonredundantsafeshutdowncapability.TheevaluationcontainedinSection9.9ofthisreportcombinedFireZones49,50,51,and52intoalargerfireareathatincludedFireZones3,32,36,48,and69.ThecombinationoftheseismicgapexemptionrequestandtheevaluationcontainedinSection9.9ofthisreportshowthatafireoriginatingfromFireZones49,50,108,or109willnotjeopardizeredundantsafeshutdowncapability.ThisisinpartduetothemodificationsthatwerecompletedinFireZones51andPage9-234 52asrecommendedintheMarch1983AppendixRsubmittaltoensuresafeshutdowncapabilitygi'venafireoriginatinginthesetwozonesorinFireZones49or50.Forfiretoadverselyimpactcapability,itwouldhavetospreadon,redundantsafeshutdowntothetwoAFWbatteryroomsonthe633ftelevationof'theAuxiliaryBui'lding'FireZones'106and107)ortheirassociatedcableslocatedinFireZones52and50respectively.ThefirewouldalsohavetospreadtothetwocorridorsrunningbetweentheUnit1andUnit2dieselgeneratorroomsonthe591ftelevationof'theTurbineBuildings.Afirethatspreadsinthismannercouldresultinthelossofbothturbine-drivenAFWpumpsand3outof.4,dieselgenerators.Theevaluationcontained-in"Section'.30ofthisreportaddressedcombiningFireZones106and,107WithFireZones49,50,51,52,3,31,32,35,=36,48,69,and146to'formalargerfirearea.ThepotentialforfiretotospreadtoFireZones52or106andFireZones50or107wasaddressed.Thisfirewasnotconsideredacred'ibleeventduetothepresenceofautomaticdetectioninallfourzonesandautomaticdrypilotsuppressioninFireZone52.TheevaluationthatcombinedtheUnit1andUnit'2TurbineBuildingsintoalargerfirearea,containedinSection9.11ofthisreport,addressedthepossibilityoffireintheTurbineBuildingsspreadingtothecorridorsbetweenthedieselgeneratorrooms,ineachunit.Thepotentialforthistooccurwasalsoidentifiedasbeinganunlikelyevent.Page9-235 InadditiontothetwounlikelyeventsoccurringasidentifiedinSections9.11and9.30ofthisreport,firewouldalsohave.tospreadfromFireZones108and109intheWestMainSteamValveEnclosuresforeachunitintoFireZone69onthe650ftelevationoftheAuxiliaryBuilding.FromFireZone69,thefirewouldthenhavetospread'downintoFireZones106or52andFireZones50"or107onthe633ftelevation.Thisfire,whichspreadsthroughout'theUnit1andUnit2TurbineBuildingsandfromtheretothe650and633ftelevationsoftheAuxiliaryBuildingisnotacredibleevent.Theonlyotherpotentialfirewhichshouldbeaddressedinthisevaluation.,isonethat.originates-in,FireZone69,spreadstobothFireZones.108.and109simultaneously,andfromtherespreads.through.FireZones33Aand34AintoFireZones33and34.A~firethatspreadsin'hismannercouldresultinthelossofallfoursteamgeneratorsinbothunits.Thetwoevaluationscontained.inSectians9.35and9.36ofthisreportaddressthepotentialforfiretospreadfromeitherFireZone108orFireZone109intoeitherFireZone33orFireZone34.Thetypesoffiresidentifiedinthesetwoevaluationswerenotconsideredcredibleevents.Forfiretoaccomplishthesamegoal,butalsooriginateinFireZone69,itwouldhavetobeafirefarlargerthancouldbesupportedbythe20,000Btu/ft2combustibleloadingexistinginFireZone69.Therefore,thisfireisalsonotacredibleevent.Page9-236

'ConclusionsBasedontheprecedingevaluation,reasonableassuranceisprovidedthatafirethatinvolveseitherFireZones69,108,or109willnotadverselyimpactonredundantsafeshutdowncapabilitiesviatheundamperedcontainmentinstrumentroompiping/ductworkpenetratingthroughthefirezones.Inaddition,theundamperedpipe/ductswillnotadverselyimpactonotherevaluationsorexemptionscontainedinthis,report.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)Thecombustibleloadingsinthezonesofconcernarelessthan20,000Btu/ftforFireZone9;40,000Btu/ftforFireZone108;and47,000Btu/ftforFireZone109.(2)AutomaticdetectioncapabilityisprovidedinFireZone69whichwouldresult'in.prompt'irebrigaderesponsegivenafireinthiszone.('3)Previouslyevaluationshave'ddressedmostofthepotentialfiresthatcouldaffectthezonesofconcernandtheywereidentifiedasnotbeingcredibleevents.(4)Forfiretoimpactonredundantsafeshutdowncapability,itwouldeitherhaveto(1)spreadtobothWestMainSteamValveEnclosuressimultaneouslyor(2)involveboththe591ftelevationoftheUnit1andUni't2TurbineBuildingsandthe633ftelevationoftheAuxiliaryBui*lding;neither.'ireisacredibleevent.Page9-237 9.39FireZone70toFireZone129BoundarEvaluation~PuroeeThepurposeofthisevaluationistoanalyzetheimpacton.redundantsafeshutdowncapabilityofanunrateddoorconnectingFireZone129(theUnit1TurbineDeck)andFireZone70(the~Unit1ControlRoomHVACRoom).Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.FireZone129is.locatedonthe633ftej,.evationoftheUnit;1TurbineBuilding.Itispartofalargerfireareathat,,includestheUnit1andUnit2TurbineBuildings,theWestMaint,SteamValveEnclosuresofeachunit,theService/OfficeBuilding,andtheScreenHouse.FireZone70islocatedonthe650ftj'elevationoftheAuxiliaryBuildingdirectlyabovetheUnit1;ControlRoom.ItispartofalargerfireareathatincludesFireZones71,72,and73.AnopenstairwayprovidesaccessuptheeastwallofFireZone129toanelevatorequipmentroomatapproximatelythe650ftelevation.Within.theelevatorequipment-roomisanunrateddoorthatleadsintoFireZone70.SafeShutdownEuimentNeitherFireZone129norFireZone70containequipmentorcablesrequiredforsafeshutdownpurposes.Page9-238 FireProtectionEuimentFireZone129isprovidedwiththermistordetectionandmanualwatersprayanddrychemicalsuppressionfortheUnit1turbines.FireZone70isprovidedwithanareaandductsmokedetectionsystem,andautomaticthermistordetectionwithmanualwaterspraysuppressionsystemforthecharcoalfilterunitsinthezone.FireHazardsAnalsisDuetothe"locationofthethetwozonesarelocated,thedoorandtheelevationsatwhichonlypotentialfirethatmustbeconsideredinthisevaluationisonethatspreadsintoFireZone70fromtheelevatorequipmentroomofFireZone129.ThefirewouldthenhavetospreadintotheControlRoomsofbothunitssimultaneouslyinordertoimpactonredundantsafeshutdowncapability.ShouldfirespreadintoFireZone70,thenthepathsforfiretospreadareidenticaltothosepresentedinthe'evaluationcontainedinSection9.5ofthisreport.Thatevaluation,whichaddressedtheunratedhatchesinthefloorofFireZones70and73toFireAreas53and54below,concludedthatfireoccurringinFireZones70,71,72,and/or73wouldnotimpactonredundantsafeshutdowncapability.Therefore,theanalysisandconclusionsidentifiedinSection9.5also'pply.ConclusionBasedonthepreviousevaluation,reasonableassuranceisprovidedthattheunrateddoorbetweenFireZones129and70doesPage9-239 notadverselyimpactoneitherredundantsafeshutdowncapabilities.Inaddition,thisevaluationdoesnotadversely'impactonotherevaluationsorexemptionrequestscontainedin.thisreport.Thebases,whichjustifythis=-conclusionaresummarizeasfollows:(1)NeitherFireZone129norFireZone70containequipmentorcablesrequiredforsafeshutdown.(2)Duetothelocationoftheunrateddoor,whichis'pproximately27ftabovetheflooroftheUnit1turbinedeckandwithinanel'evatorequipmentroomenclosure,theonlypotentialforfirespreadisfromtheequ'ipmentroomenclosuretoFireZone70andfromtheretobothControlRoomssimultaneously.(3)ThepotentialforfiretospreadfromFireZones70,71,72,and/or73tobothControlRoomssimultaneouslywasaddressedintheevaluationcontainedinSection9.5ofthisreport.Theconclusionsofthatevaluation,whichwasthatfirewouldnotspreadinthismanner,alsoapplytothisevaluation.Page9-240 9.40FireZone7toFireZone61BoundarEvaluation~PuroseThepurposeofthisfireareaboundaryevaluationistodeterminetheimpactonredundantsafeshutdowncapabilityoftwounratedfield-fabricatedfusiblelinkactuatedguillotinetypedamperspresentlylocatedbetweenFireZone7(Unit1"Quadrant1CableTunnel)andFireZone61'SprayAdditiveTankRoom):Inaddition,thisevaluationwill-alsoverifythatthereisnoadverseimpacttootherevaluationsorexemptionrequestscontain'ed'inthisreport:DescritionFireZone7istheUnit'Quadrant1,CableTunnel,el.596eft.FireZone61'slocated'onthe587ft,elevationoftheAuxiliaryBuilding.Anunrated,fieldfabricatedfiredamperconstructed'f3/8-in.steelplateisprovidedina3in.diameterHVACopeninginthecommonwallseparatingFireZone7andFireZone61.FireZone7,byitself,makesupafirearea,whilethefireareacontainingFireZone61consistsofFireZones5,6A,6M,6N,6S,61,64A,64B,65Aand65B.FireZone5istheonlyadjacentzonetoFireZone61withinthesamefirearea..SafeShutdownEuimentFireZone7contains.nosafeshutdowncomponentsbutdoescontainsafeshutdowncables.Thesafeshutdowncablesareassociatedwithvariousprocessmonitoringinstrumentation,Page9-241 auxiliaryfeedwater'upplyvalvesandpressurizerPORV'sand~'Iblockvalves.NosafeshutdowncomponentsorcablesexistinFireZone61.However,thefireareawhichcontainsFireZone61doeshavesafeshutdowncomponentsandcables.Amajorityofthesafeshutdowncomponentsandcables'within'ireZone5,whichisadjace'nttoFireZone61,areassociatedwithlocalandalternateshutdownprocessmonitoringindication.FireProtectionEuimentFiredetectionandautomaticcarbondioxidesuppressions'ystemsareprovidedforFi;reZone7whichhasanequivalentf>ire',-severity;.under:100'inutes(theactualfireseverityexistingat"thistimeisapproximately"-87minutes).WhileFireZone61-doesnot'aveanautomaticsuppressionsystem,itdoescontain'"a-smoke'etectionsystemwithmanualfirefightingequipmentlocatedoutsideof~thezone=.andanequivalentfireseverityunder20minutes(theactualfireseverityexistingatthistimeisapproximately10minutes)..FireZone5havinganequivalentfireseverityoflessthan20minutes(theactualfireseverityexistingatthist.imeisapproximately8.5minutes),isalsoequippedwithautomaticfiredetectionandwatersuppressionsystems.FireHazardsAnalsisFireZone7,withanequivalentfireseverityofunder100minutes(theactualfireseverityexistingatthistimeisPage9-242 approximately87minutes),isequippedwithanautomaticcarbondioxidesuppressionsystemwhichwouldquicklyextinguisha..fireinthiszone.Therefore,reasonableassuranceisprovidedthatafireoriginatingwithinFireZone7wouldnotspreadtoanyotherfireareas/zo'nes.FireZone61,.althoughnotequippedwithanautomaticsuppression.system,is.providedwithan.ionizationsmokedetectionsystemtoensurefastresponsetoanyfirestartingwithinthiszone.Thesmokedetectionsystemcoupledwith:(1)thelackofsafeshutdowncablesorequipmentwithinthe-zone;(2)an,equivalent-fireseverityofunder20minutes(theactualfireseverityexistingatthistimeisapproximately10minutes);and(3),manualfirefighting;equipmentlocatedoutsidethezone,.ensuresafastresponseandextinguishment'fanyfirestartingwithinthiszone.Ifa,fireshould.start,inFireZone5.(theonlyadjacentfire,zonetoFireZone'1withinthesamefirearea)thedetection.andsuppression'systems,coupledwiththeequivalentfire(theactualfireseverityexisting8.5minutes),providesreasonablenotspreadtoFireZone61.severityofunder20minutes'atthistimeisapproximately0assurancethatthefirewillFactoryMutualhaspublished'standard,"LossPreventionData"Section1-45whichappliestoairductsystems.Theobjectivesofthestandardare:(1)"Torestrictthespreadoffire,smoke,andheatthroughair-conditioningsystemsfromonefireareatoanotherorintoabuildingfromoutside.Page9-243 (2)Tomaintainthefireresistiveintegrityofelements,suchasfloors,walls,andcolumnsbytheductsysteminstallation,byminimizingsourcesandcombustibilityoftheelementsofsystem.buildingaffectedignitiontheduct(3)Todiscusstheuseofairductsystemsfortheadditionalpurposeofemergencysmokecontrol."Thestandardprovidesdesignguidanceandrecommendationsforductsystemsincludinglocationandminimumdesignrequirementsforfiredampers.InreviewingtheFactoryMutualSystemspecificationsSection1-45"LossPreventionData,"Page'l3,Item2,under"Recommendations"states:"Whereverductspassthroughinteriorfirecutoffs,of.three-hourormorefireresistanceratings,openings18in.(455mm)ormoreindiameteror'onlongestsideshouldbeprotectedbyadoorarrangementhavingan,overall,firerating'fthreehours.Atopeningsinsuchcutoffsnotexceeding18in.(455mm)indiameteroronlongestside,1/8in.(3.2mm)steelplatesmaybeused."Thefieldconstructeddampersarelocatedinductswhichgothroughawallpenetrationthatislessthan18in.indiameter.Thedampersareconstructedof3/8in.thicksteelplate.TheymeettheFactoryMutualrequirementsforprotectionof.openingsnotexceeding18in.in.diameterlocatedinbarriersrequiredtohaveathree-hourfirerating.Basedonthisguidance,theexisting3/8-in.thickfusible-linkactuatedsteelplateprovidesadequateprotectionfortheventilationopeninginthePage9-244 IbarriercommontoFireZone7andFireZone61.Therefore,the--boundarybarri:erbetweenFire-Zones7and61canbeconsideredasafireareaboundary.ConclusionBasedonthepreviousevaluation,theexistingfieldfabricatedfusiblelinkactuatedguillotine-typedamperslocatedbetweenFireZone7andFireZone61isanacceptabledeviceformaintainingtheratingofthefireareaboundary.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluationsorexemptionrequestscontainedinthisreport.Thebaseswhichjustifythisconclusionaresummarizedasfollows:(1)Theexisting.dampermeetstherequirementsoftheFactoryMutualSystemspecifications.forfire:dampers."(2)FireZone7presentlyisprovidedwithanautomaticcarbondioxidesuppressionsystem.whichwouldquickly-extinguishafireinthisarea.FireZone61hasbeenprovidedwithanautomaticsmokedetectionsystem,manualfirefightingequipmentlocatedoutsidethezoneandhasanequivalentfireseverityofunder20minutes.(3)SinceFireZgne.61hasacombustibleloading.under27,000Btu/ft(under20minutesfireseverity)thisareaisnotaprimarysourceoffire.(4)FireZone5,whichistheonlyadjacentfirezoneto61withinthesamefirearea,isprovidedwithautomaticfiredetectionandsuppressionandhasanequivalentfireseverityoflessthan20minutes.(5)Replacingtheexisting3/8-in.thicksteelplatedamperswithathree-hour-rateddamperswouldnot'nhancetheprotectionprovidedbytheexistingconfiguration.Page9-245 9.41FireZones37and51HVACDuctPenetrations~PuroeeeIThepurposeofthisevaluationistoanalyzetheimpactonIsafe'shutdowncapabilitydueto15undamperedHVACpenetrati'onsconnectingthe617ft'and'633ftelevationsoftheAuxiliaryBuildingbetween.Fire'ones.37and51.'naddition,thisevaluationwill'lsoverifythatthereisnoadverseimpacttootherevaluationsorexemptionrequestscontainedinthisreport.EachofthefifteenundamperedHVACducts(8"indiameter)p'rovideexhaustairforthedemineralizertankcubicleslocatedonthe617,ftelevationoftheAuxiliaryBuildinglocatedinFire'Zone37,Fire'Zone37".i:spartofthefireareadefinedbyFireZones37,'.43,4'4A,44B;44C,.44D,44E,44F,44G,44H,44N,and4'4S.!Eachofthedemineralizertankcubicleshasanundampered(8"diameter)supplyductpenetratingfrom.the609ftelevationofFireZone44NbelowandintothelowerportionofeachcubicleinFireZone37.Noductworkisprovidedwithinthecubiclesthemselves.Ductsor'iginateattheceilingovereachtank,riseapproximatelyvertically,andenteracommonexhaustheaderlocatedonthe633ftelevationoftheAuxiliaryBuildinginFireZone51.,FireZone51ispartofthefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146.ThecommonexhaustductthentraversesthroughFireZone51Page9-246 toFireZone52,onthe633ftelevationoftheAuxiliaryBuilding.AirfromthisductisnormallyexhaustedfromtheAuxiliaryBuildingbytwoexhaust=fans(2-HV-AX-1,2).SafeShutdownEuimentFireZone51islocated.onelevation633ftandiscontainedinthefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146.Safeshutdownequipmentislocatedi:nFireZones50,52,69,106,and107.Theequipmentincludes1-CM0-429,2-CMO-429(CCWtoRHRheatexchangerisolationMOV),1-CCW-214,1-CCW-220,2-CCW-214,2-CCW-220(CCWsurgetankmanualisolationvalves),MCCs1-AM-A,2-AM-A,l-AM-D,2-AM-D,batterydistributioncabinetDCN(Unit1andUnit2)andbatteriesassociatedwithturbine-drivenAFWpumps.Various4cablesarelocatedinFireZones32,50,51,52,69,106and107.FireZones3,31,35,36,48,49and146donotcontainanysafeshutdownequipmentand/orcables.Basedonthesafeshutdownsystemanalysis,intheeventofafireinthisarea,allsafeshutdownsystemshaveatleastonepathfreeoffiredamageineachunitexceptforsourcerangemonitoringinstrumentation.However,theMarch1983submittalrecommendedtheadditionofanalternatesourcerangeneutronmonitoringchanneltoprovide'ndicationatlocalshutdownpanelLSI-4locatedinFireZone5.FireZone37islocatedonelevation617ftandiscontainedinthefireareadefinedbyFire.Zones37,43,44Athrough44H,Page9-247 44Nand44S.Thisfireareacontainsvarioussafeshutdownmotorcontrolcenters,pumpsandredundantcables.AsrecommendedinSection8ofthisreport,variousmodificationswillbemadeinthisfireareatoensuresafeshutdowncapability.FireZone37containsnosafeshutdownequipmentand/orcables.FireProtectionEuimentThefireareadefinedbyFireZones37,43,44Athrough44H,44N,and44ScontainsautomaticdetectioninFireZones37(outsideofthedemineralizercubicles),43,44Nand44S.Automaticdrypilotpr'eactionsprinklers,includingprotectionofstairwaystoadjacentelevations,areprovidedinFireZones.44Nand44S.ThefireareadefinedbyFireZones3,31,32,35,36,48,49,50,51,52,69,106,107,and146containsautomaticdetectioninFireZones32,48,49,50,51,52,69,106and107.Onlypartialcoverageisprovided.inFireZone3.NodetectioncoverageisprovidedinFireZones31,.35,36and146.Thermistorsarealsoprovidedforthecharcoal-filterunitsinFireZones49,50and69.AutomaticdrypilotpreactionsprinklersarecontainedinFireZones32,51and52withpartialcoverageprovidedinFireZone3.AmanualdelugesystemisusedforthecharcoalfilterunitsinFireZones49,50and69.FireHazardsAnalsisTheabovefire'reashaveequivalent'ireseveritiesasindicatedbythefollowing:Page9-248 FireAreaorFireZonesComosinaFireAreaAreaFireSeverity(Minutes)FZs3,32,36,48,49,5051,52,69,106,107,14625FZs37,43,44Athrough44H,44N,44S35Inorderforafiretoaffectbothfir'eareas,afirewouldhavetostartinFireZone37orpropagatefromFireZone44Nto37.ThefirewouldhavetothentravelthroughtheexhaustductsofFireZone37toFireZone51.FireZones44Nand37(outsideofthedemineralizercubicles)areprovidedwithautomaticdetec-ti:onsystems.Aspreviouslystated,FireZone44Nisprovidedwithanautomaticdrypilotpreactionsuppressionsystem.There-fore,ifafirewastost,artin44N,itwouldmostlikelybeextinguishedinitsincipientstagesbeforesmokeandhotcombus-tiblegascouldtravelthroughFireZone37toFireZone51.However,ifhotcombustiblegasandsmokeweretotraveltoFireZone37,entertheindividualdemineralizercubicles,andthenspreadintotheundamperedcommonexhaustductinFireZone51above,normallyone.ofthetwoUnit2AuxiliaryBuildingexhaustsystemventilationfanswouldexhaustthesmokeandgas.Aspreviouslydiscussed,FireZones50.,51,52,106and107aretheonlyfirezonesinthefireareacontainingsafeshutdownequipmentand/orcables.Thesefirezonescontainautomaticdetectionsystemsforgeneralareadetection,withthermistorsandamanualdelugesystemalsoprovidedforthecharcoalfilterPage9-249 unitsinFireZones49and50.FireZones51and52are<<protectedbyautomatic,drypilotsprinklersystems.Thisfire-areahasanequivalentfireseverityoflessthan25minutes.-(Theactualfireseverityexistingatthistimeisunder12.9-minutes.)Shouldtheproductsofcombustionescapetheductandenter;FireZone51or52,reasonableassuranceisprovidedthatthefireprotectionsystemswoulddetectandacttoextinguishthefire.Therefore,transmissionoffirebetweenthetwofireareasisnotacredibleevent.-SstemsAnalsisTheabovefirehazardsanalysisdemonstratesthatitis,-extremelyunlikelyforafiretopropagatetotheadjoiningfireareasatvariouselevations.'singtheabovescenariosasa-basis,asystemsanalysiscanbeperformedtodeterminethe.impactofafireonthesafeshutdowncapabilityoftheplant.Forthepurposesofthisanalysis,thefollowingassumptionsareused:(1)Theexhaustductisacommonfiretobothofthefirehowever,itisnotcrediblefireareasaresimultaneouslymeansofcommunicationofareasdescribedabove;thatbothoftheentireengulfedbyfire.(2)Considering'assumption(1)above,theworst-casescenarioisdefinedasafiretotallyengulfingeitheroneofthefireareas.Thefirewouldthentravelthecircuitouspath,describedinthepreviousscenarios,inoneoftheadjacentfireareasuntilthefirereachesafirezonewithinthefireareacontaininga.detectionandsuppressionsystemcapableofdetectingandextinguishingthefire.Page9-250 (3)Itisassumedthatthefirestartsatthe609ftelevationoftheAuxiliaryBuilding(FireZone44N)andthentravelsthroughtheverticalportionoftheHVACducttotheunratedpenetrationsintoFireZone37.ItwouldthenhavetoentertheexhaustductconnectingtothecommonheaderinFireZone51.ForthepurposesofthisanalysisitisassumedthatthefirewillinvolvethefireareadefihedbyFireZones37,43,44Athrough44H,44N,and44S,alongwithFireZone51or52.However,sinceIII.G.2separationhasbeenestablished.betweenFireZones44Nand44Sbothofthesefirezoneswillnotburnsimultaneously.Asaresult,thesystemsanalysisassumesalossofsafeshutdowncomponents(i.e.,equipment'and/orcables)onlyinFireIIZones37,43,'4A,through44H,'nd,44NalongwithFireZone51and/or52.'orboth.theUnit1andUnit.2systemsanal'yses,itwasIIconcludedthatatleastonepathofsafeshutdowncomponentsexistsforeachsafeshutdownsystems.ThisevaluationfortheabovefireareasandfirezonesdoesnotaffecttheexistingexemptionrequestsconcerningtheAuxiliaryBuildingHVACDuctPenetrations(Section7.13)ortheContainmentSeismicGaps(Section7.14).ConclusionBasedonthepreviousanalysis,reasonableassurancecanbeprovidedthatafirestartingfromFireZones37,and/or44NandpropagatingthroughtheundamperedductstoFireZone51and52Page9-251 willnotadverselyimpactonsafeshutdowncapabilitiesoftheplant.Inaddition,thisevaluationdoesnotadverselyimpactonotherevaluations.orexemptionrequestscontainedinthisreport.Thebasesfortheaboveconclusionaresummarizedbelow:1I(1}Smokeandhotcombutibl'esenteringanyofthe15exhaustductswouldnormallytendtobeexhaustedthroughtheengineeredsafeguardssystemsouttheUnit2plant,vent.(2)Smokeand.hotcombustiblesenteringanyofthe15exhaust.ducts'ouldtendtoaccumulateinthehorizontalsectionsofthecommonexhaustheaderinFireZones51and52,wh'enthefanunitsarenotrunning.Thehotsmokewouldhavetoresultintheignitionofcombustiblematerialin'itherFireZone51and/or52'nordertospreadtoadjacentfirezones.Due"toexistence'oftheautomaticdetectionandsuppressionsystemsinFireZones51and52,thisisnotconsideredacredibleevent.(3)(4)Detection'aridsu'ppressionsystemsexistintheadjacentfireareastothe15exhaustductswherecombustiblesexist.AfireinvolvingFire'Zones37,43,44Athrough44H,and44N,alongwith51and/or52,hasbeenconsideredintheabove,fireprotectionanalysis.Afireinvolvingthesefirezoneswillnot'jeopardizethesafeshutdowncapabilityoftheplant.*1Page9-252 62?660907666350609'ONPEGIAP.HATCHWIREMESHGATECMO-4I9STAIRS-WOEMESHGATPASSENGERVFREIGHTEIEUAIORELEVA'TORyI!iII$/F.Z.No.44EJFZNL44FII[rL+'obxVOLUIIECONTROLTANKRAMPUPUPTOELEV.433RHIZSEIRV3IOIMO3I4HE~ITEICM3III.TORRHl28WIRV'320IMO'322ICM32IHE~ITWIMO324~F2No39SECTIONA-AUPlllIUlWMOT3Z~CMO4IOwwra+Lj=PHE.15ECCWPUMPAREACMO4IOD4P2-PPIOESPARE9ILMONITORTANKS-.ot.bkr2~.KPc-~2jgPFPggv+g~IPg'<'-%>&'4+--ciao:LEGENO3-HOURBARRIER-COZTANKWMO736~g+CMO.420LAUNDRY'OOMI%ISWIPPIOE7:CMO4II~tIIPPIOW2PPIOWCBUNGLEDGENOTE:OIMENSIONSAREAPPROXIMATENOTTOSCALEFIGURE9.3-1PLANANDELEVATIONOFCEILINGLEDGEINFIREZONE44'

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