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Forwards Summary Rept of Safety Evaluations Approved During Period from 911231 to 920101 for Susquehanna Ses Units 1 & 2,per 10CFR50.59
	ML18017A264
Person / Time
Site:	Susquehanna
Issue date:	06/04/1992
From:	KEISER H W; PENNSYLVANIA POWER & LIGHT CO.
To:	MARTIN T T; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
	PLA-3757, NUDOCS 9206150082
	Download: ML18017A264 (229)
	v • d • e

S,~"ACCELERATEDSTRIBUTIONDEMONSTTIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:.9206150082DOC.DATE:92/06/04NOTARIZED:NOFACIL:50-387SusquehannaSteamElectricStation,Unit1,Pennsylva50-388SusquehannaSteamElectricStation,Unit2,PennsylvaAUTH.NAMEAUTHORAFFILIATIONKEISER,H.W.PennsylvaniaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONMARTIN,T.T.Region1(Post820201)DOCKET0500038705000388

SUBJECT:

ForwardssummaryreptofsafetyevaluationsapprovedduringRperiodfrom911231to910101forSusquehannaSESUnits1&2,per10CFR50.59.DISTRISOTIONCODE:IE47DCOPIESRECEIVED:LTRIENCLiSIZE:(0+D"":">>""""'"-~--"--~""--~-"~*"*0500038705000388ARECIPIENTIDCODE/NAMEPD1-2LARALEIGHPJ.iNTERNAL:ACRSAEOD/DSP/TPABNRR/DOEA/OEABllRGN1FILE01COPIESLTTRENCL101066111111RECIPIENTIDCODE/NAMEPD1-2PDAEOD/DOANDLPLHFB11REGFILE02COPIESLTTRENCL55111111DDEXTERNAL:NRCPDRNOTES:11ENSIC1111DNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASIE!CONTACTTHEDOCVMENI'ONTROLDESKROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDIFRtlBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!DDTOTALNUMBEROFCOPIESREQUIRED:LTTR22ENCL20 PennsylvaniaPower8LightCompanyTwoNorthNinthStreet~Allentown,PA18101-1179~215/774-5151HaroldW.KeiserSeniorVicePresident-Nuc/ear215/7744194JuwaJ>Os'r.ThomasT.MartinRegionalAdministrator,RegionIU.S.NuclearRegulatoryCommission475AllendaleRoadKingofPrussia,PA19406Submittedpursuantto10CFR50.59SUSQUEHANNASTEAMELECTRICSTATION10CFR50.59SUMMARYREPORT-1991PLA-3757FILER41-2A

DearMr.Martin:

Pursuantto10CFR50.59(b),enclosedpleasefindasummaryreportofthesafetyevaluationsapprovedduringtheperiodfromJanuary1,1991toDecember31,1991forSusquehannaSESUnits1and2.Thereportformatisasfollows:SERNo.-CrossReference-Uniquenumberfor'achsafetyevaluation.Referencetothedocumentforwhichthesafetyevaluationwasprepared.DescriptionChange-Abriefdescriptionofthechangemadetoprocedures,equipmentortests.Summary-AsummaryofthethreerequirementsfordetermininganunreviewedsafetyquestionasdeftnedinlOCFR50.59(a)P).Ifyouhaveanyquestions,pleasecontactJ.B.Wesnerat(215)774-7911.Veyyours,H'.W.iserEnclosure920b150082920b04PDRADOCKOS000387RPDR FILER41-2APLA-3757Mr.ThomasT.MartinCC:(original)Mr.J.J.Raleigh,NRCProjectManagerMr.G.S.Barber,NRCSr.ResidentInspector fgRgg.:91-001,RREFEREE:DCP90-3002A,Rev.0FHAEr-9206150082InstallpipetapstoconnectReactorBuildingOutageChiller.R:I.No.Thismodificationdoesnotaffectthefunctionofthesafety-relatedcomponentsoftheReactorBuildingChilledWaterSystem.Effectsonbuildingdesigntemperaturelimitsareminimalsinceworkwasperformedduringthespringwhentheoutsideairtemperatureswerelow.PartialcoolinginsidetheReactorBuildingwasprovidedbyrunningreactorbuildingventilationfans.II.No.ThismodificationinstalledpipingtapsandvalveswhichdonotaltertheintendedfunctionoftheReactorBuildingChilledWaterSystem.Itprovidesnon-outageconnectiontoaReactorBuildingOutageChiller.IH.No;Thismodificationneitherreducestheoperabilityofanyequipmentnorrequiresanyadditionalsurveillancetoensureplantsafety;thismodificationimprovesdrywellcoolingcapabilityduringanoutage.$ER~.:91-002RREFEE:DCP90-3011,Rev.0DERIFHAE:ReplacingtheexistingHPCItestvalveinternalswithspeciallydesignedthrottlinginternals,andresizingthedownstreamorifice.R:I.No.ThemodificationdoesnotaffecttheabilityofthevalvetocloseasrequiredtosupportHPCIinjectiontotheRPV.TheabilityoftheHPCIsystemtooperateasevaluatedintheFSARwillnotbeaffected.II.No.ThismodificationwillenhancetheabilityoftheHPCIfullflowtestvalvetoperformitstestingfunctionduringthelowpressuresurveillancetest.Thenew.versionofthefrictionelementtrimenhancesthethrottlingcapabilityofthevalveandhasnoadverseeffectonthevalve'sclosingability.III.No.ThesafetyrelatedfunctionoftheHPCIvalveistoremaininitsnormallyclosedpositionoractuatetotheclosedpositionifthevalvewasinthethrottledopenpositionduringtherequiredsurveillancetest.Ineithercase,themarginofsafetyisunaffectedsincethenewinternalshavenoeffectontheabilityofthevalvetoclose.

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$ERl~.:91-003RRERE:DCP90-3049,Rev.0Installahighlyaccurateultrasonicfiowmonitoringsystemfor.bothoftheUnit2,96inchpipessupplyingcirculatingwatertothecondenser.I.No.ThisactiondoesnotmateriallyaffectthedesignfeatuieslistedintheFSAR.Thereisnoquantifiableincrc'iseintheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentrelatedtosafety.II.No.No-featuresofthedesignorthelocationforinstallationhavebeenidentifiedwhichindicatetheexistenceofanymechanismthatwouldcreatethepossibilityofanaccidentormalfunctionofadifferenttypethanpreviouslyanalyzedintheFSAR.III.No.Thismodificationaffectsthecirculatingwatersystemwhichhasnosafety-relatedfunction.Flowmeasurementofcirculatingwaterhasnodirectinterfacewithanysafetyfunctionintheplant.$ER~.:91-004RREFENE:OP-124-001,Rev.0DERlPTIFHAE:RBCCWSystemOperatingTemperatureReduction.SDSKAilY:I.No.RBCCWhasnosafetyrelatedfunction;itservicesheatloadsvitalforcontinuedplantoperationbutservicesnoequipmentnecessarytosafelyshutdowntheunit.II.No.ThisevolutioninvolvesslowlyloweringpresentRBCCWtemperatureby10degreesF(maximum)temporarily.ItseffectwillnotbefeltonvitalplantoperatingequipmentsuchasoffgasandCIGwhichautomaticallyregulatesRBCCWflowtomaintainsystemoperatingconstant.III.No.ThisevolutionwillnotdisruptcontinuedoperationofanysystemsupportedbyRBCCW.

0

~BR~.:91-005:DCP87-7032,Rev.0Convertthemainturbinecontrolvalveoperatingmodefromfullarctopartialarcadmission.SIMLAAR':I.No.ThemodificationdoesnotchangetheperformanceofanysafetysystemsincetheEHCsystem'isnotacontrolsystemrequiredforsafety,andpost-modificationstart-uptestingwillbedonetoverifythatthecontrolsystemrespondsasoriginallydesignedandtested.II.No.Thereisnochangeinthedesignfunctionofthecontrolvalvesotherthanthestroketime.Theoveralleffectisalessseverepressurizationtransientandtheexistinganalysisconservativelyboundsthechange.HI.No.Thegeneratorloadrejectionanalysisisoneofthebasesforthe"MCPR"limit.Asstatedabove,thegeneratorloadrejectiontransientanalysisconservativelyboundsthepartialarcmodeofoperation.

$8R~.:91-006:DCP87-9032,Rev.1ConvertCharcoalFilterDelugeSystemstoManualSystemsandrewireflowswitchalarmcircuitry.I.No.Thedelugesystemconfigurationwouldbeidenticaltothatwhichexiststoday.Theonlyaffectthismodificationhasisthatthecontrolroomwillnotbeautomaticallynotifiedifoneoftheoutsidestemandyokevalveswasmovedtotheopenpositioninadvertently.Modifyingtheflowswitchcircuitryalarmprioritywillprovidedetailedinformationtothecontrolroomoperatoronfireprotectionsystemactuation.II.No.~~Thesmolderingnatureofacharcoalfilterfirewillallowadequatetimeforanoperatortoverifyafireconditioninthefilterandoperatethedelugesystemmanuallywithoutdeleteriousaffectsontheaffectedfiltertrainortheredundantfiltertrain.III.No.ChangingthedelugesystemsforthecharcoalfiltersontheCREOASSsystemwillnotaffecttheacceptancelimitsforthesystembecausethischangewillnotaffecttheoperationofthesystem.Changingtheflowswitchcircuitrytoprovidea"fire"alarmatthecontrolroomfireprotectionpanelratherthana"trouble"alarmwillnotaffecttheoperabilityofthefiresuppressionsystemsthatprovidesuppressionforsafetyrelatedequipmentnoraffectthecommitmentsregardingthefireprotectionpanelinthecontrolroom.

/ERIN.:91-007RREFERENE,DCP88-3078,Rev.0DERIPTIHANE:ReplacesthecurrentlyinstalledUnit2LiquidRadwasteCollectionsystemprimarycontainmentisolationvalveswithnewAnchorDarlingparalleldiscgatevalvesandnewair-operatedactuators.ZUdgBRF:I.No.ThereplacementvalvesstroketimeswillmeettherequirementsofFSARSection6.2.4andbeseismicallyqualifiedconsistentwithSection3.2.1.ThemodifiedvalvehasthesamefunctionastheexistingPacificvalveandtheoperationofthisvalvewillnotbechangedinanyway.II.No.SeeI.above.IH.No.Thischangereplacestheoriginalvalveswithvalveswhicharedesignedandbuilttothesamestandardsanddesignconditions.ThenewvalveswillnotinanywaychangetheoperationoftheLiquidRadwasteCollectionSystem.~ER~.:91-008RREFERENE:DCP90-3032,Rev.0DERII'TINFHANE:InstallationofinterfacestonewTurbineandReactorBuildingsSampleStations.MARY:I.No.ThismodificationdoesnotchangethefunctionoftheProcessSamplingSystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem,thusdoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentrelatedtosafety.II.No.Thismodificationtothefiltersexhaustsystemandtheadditionoftheexhaust.boosterfanisconsideredtobenon-safetyrelated.Theoperationofthenewsamplestationisnotrequiredforsafeshutdownoftheplant.III.No.ThismodificationdoesnotreducethemarginofsafetysincetheinterfacesbeinginstalledfortheTBSSandRBSSarenotsafety-relatedanddoesnotaffectanymarginsofsafetydescribedintheTechSpecs.

JERKIN>.:91-009RRE:DCP90-3033A-G,Rev.0E:ReplaceCondensateDemineralizerVesselUnderdrainSystem,Unitl.I.No.'heaccidentanalysisaddressedinFSARChapter15isnotaffectedbythismodification.Thenewunderdrainswillbedesignedtowithstandmaximumsystemdelta-Pandwillbeadequatelysupportedagainstreactionforcesunderfullflowconditions.II.No.Thisactionimprovesflowdistributionthroughtheunderdrainsandreducesthelikelihoodofpoorqualityfeedwaterresultingfrompoorflowdistributionthroughtheunderdrainlaterals.III.No.Theconductivitymonitoringequipmentwillnotbeaffectedbythisaction.Reactorwaterconductivityshouldbeimprovedbyreducing/eliminatingcondensatedemineralizedresinheels.$ER~.:91-010RRE:DCP90-3034A-G,Rev.0DERIPTIFHAE:ReplaceCondensateDemineralizerVesselUnderdrainSystem,Unit2.SUMMARY:I.No.TheaccidentanalysisaddressedinFSARChapter15isnotaffectedbythismodification.Thenewunderdrainswillbedesignedtowithstandmaximumsystemdelta-Pandwillbeadequatelysupportedagainstreactionforcesunderfullflowconditions.II.No.Thisactionimprovesflowdistributionthroughtheunderdrainsandreducesthelikelihoodofpoorqualityfeedwaterresultingfrompoorflowdistributionthroughtheunderdrainlaterals.III.No.Theconductivitymonitoringequipmentwillnotbeaffectedbythisaction.Reactorwaterconductivityshouldbeimprovedbyreducing/eliminatingcondensatedemineralizedresinheels.

DCP90-9075EliminateSprayPondLowTemperatureAlarms.I.No.Thismodificationwillnothaveanyadverseimpactonplantsafetyfunction,sincethelowtemperaturealarmstobedeleteddonothaveanysafetyfunctions.ThespraypondhasthesafetyfunctionofsupplyingwaterfortheEmergencyServiceWaterSystemandtheResidualHeatRemovalServiceWaterSystem,aswellasservingastheultimateheatsinkfortheplant.II.No.Thelowtemperaturealarmprovidesnotificationthatthepondsurfaceisgettingclosetofreezing.However,theFSARpointsourthatalowerpondtemperaturewillincreasethequantityofsensibleheatthatcanbeabsorbedbythewatervolume.Allowingthepondsurfacetofreezewouldincreasetheheatabsorptioncapabilityofthepondevenmore.III.No.Asstatedabove;thismodificationwillnothaveanadverseimpactontheabilityofESW,RHRSW,ortheultimateheatsinktoperformtheirdesignfunctions.+F~R~.:91-014RREFEREN:NL-90-042,Rev.0;OP-139(230)-001,002&003DERIHAE:Reviseprocedurestosupportoperationofsevencondensatedemineralizersat100%power.I.No.Thesystemwillmaintaintherequiredcondensatepurityasalreadydefinedintheexistingchemistryprogramswhileinthesevendemineralizerconfiguration.Theintentofthechangeistoimprovetheeffluentpurity.II.No.Apressureboundaryfailureofacondensatedemineralizerwhileinthesevendemineralizerconfigurationwouldbenodifferentthatafailureinthesixdemineralizerconfiguration.Negativeeffluentqualitychangescouldoccurformanyreasonsotherthanthisactionandtheeffectsonotherequipmentwouldbethesameregardlessofthereason.III.No.TechSpec3/4.4.4setsChemistrylimitsforthereactorcoolantsystem.Thebasis~~ofthespecificationistopreventdamagetothereactormaterialsincontactwiththecoolant.Theintentofthisaction'istoimprovereactorcoolantchemistry.

$ER~.:91-015RR:DCP88-3076A,Rev.1E:ReplacetheUnit2BuildingChilledWaterLoop"A"primarycontainmentoutboard3"isolationvalveswithnewAnchorDarlingparalleldiscgatevalvesandnewair-operatedactuators.R:I.No.Thereplacementvalves'troketimeswillmeettherequirementsofFSARSection6.2.4andwillbeseismicallyqualifiedconsistentwithFSARSection3.2.1.ThemodifiedvalveshavethesamefunctionastheexistingPacificvalves.Thismodificationwillnotchangetheoperationofthisvalveinanyway.II.No.III.No.SeeIabove;themodificationdoesnotimpactanysafeshutdownpathsasevaluatedinAppendixR.rThischangereplacestheoriginalvalveswithvalveswhicharedesignedandbuilttothesamestandardsanddesignconditions.ThenewvalveswillnotinanywaychangetheoperationoftheReactorBuildingChilledWaterSystem./gall~.:91-016Systems.UpgradeAuxiliaryBoilerConductivityMonitoringandControlFAE:DCP89-3031,Rev.0MMARY:I.No.Sincethismodificationreplacesexistingauxiliaryboilerinstrumentationwithmoreaccurateandreliabledevicestoenhancetheoperabilityandavailabilityoftheauxiliaryboilerinsupportofproducingamorereliablesteamsupplytoendusers,themodificationwillinfactdecreasetheprobabilityofoccurrenceofanyconductivityrelatedfailuresthatcouldaffectauxiliaryboileroperation.II.No.Thenewconductivitysystemperformsthesamefunctions(controlinterlocksandalarms)asthesystemthatisreplaces.Allfailuremodesofthenewconductivityinstrumentsarethesameastheexistingdevices.III.No.Thereisnodiscussionoftheauxiliaryboilerconductivitymonitoringsystem,theauxiliaryboileritself,ortheuseofauxiliarysteambyanyplantcomponentinthebasisforanyTechnicalSpecification.

~Egl~.:91-017RREFBRE:DCP89-9127,Rev.0DERIInstallacheckvalveforeachofthetwoDieselGenerator"E"startingairsystems.KNNIARY:I.No.FailureofthecheckvalveormalfunctionoftheaircompressorthatpreventstherestoringofreceiverpressureduringnormalplantoperationwillinitiateanalarmandappropriateoperatoractionsinaccordancewiththecuirentTechSpecs.Thisactionmalinesthe",E"dieselairstartlineupsimilartothatofdieselsAthroughD.II.No.Failureofthecheckvalve,ofanykind,doesnotcauseanydifferentmalfunctionsthanthoseoftheexistingaircompressorortheassociatedcomponents.IH.No.Inaneventthatthereceiverscannotberechargedduetofailureofthischeckvalve,thelowreceiverpressurealarmwillbeactuatedat240psig,andtheoperatorisrequiredtotaketheproperaction.Rechargingofthereceiveroccursduringnormaloperationratherthanduringemergencydieselstarting.~ER~V~.:91-018RREFBRB:DCP89-9203,Rev.0DERlPTINFHAB.InstalladditionalpublicaddresssystemcomponentsintheUnit2condenserbay.SUMh/ARY:I.No.Theequipmenttobeinstalledbythismodificationwillnotinterfacewithanyplantcomponentdescribedasnuclearsafetyqualifiedornecessaryforsafetyplantoperation.TheplantPAsystemisusedtoprovidenormalintra-plantcommunication;orintheeventofaconditionwhichthreatenspersonalsafety,tobroadcastanalarmandprovideinstructionstoplantpersonnelconcerningtheemergencycondition.II.No.TheadditionofthePAsystemequipmenttothecondenserbaywillenhancetheabilityofthesystemtoperformitsprimarydesignrequirementsofprovidingnormalandemergencyintra-plantcommunications.ThesecomponentswillbeinstalledintheTurbineBuildingusingestablishedspecificationsandprocedures.III.No.~~TechSpecSection3/4.9.5dealswiththerequirementsforcommunicationcapabilityduringfuelmovementsinthereactorvessel.Thiscommunicationcapabilityisnotaffectedbythechangestobeincorporatedbythismodification.

NL-91-001,Rev.0;OP-261-002Cationresinincarboxylicacidform(normalcationresinisinsulfunicacidform).I.No.Thenewresinisexpectedtoimprovevesselchemistryandreducetheprobabilityofchemistryinducedfailuresofallequipmentincontactwithcoolant.ThisactionreducesthepotentialeffectsofaRWCUresinintrusionsincetheimpuritiesfromtheresinarereduced.II.No.Thisactionisexpectedtoraisethepurityofthecoolant,byreducingbaselinesulfatelevelsslightly.III.No.ThisactionshouldimproveTechSpecchemistryparameters.$gR~.:91-020RREE:DCP89-3021C,Rev.0Improveheattracecontrolofcontainmentatmospherecontrolisolationvalves.MARY:I.No.ThisactionassuresthattheheatappliedtotheH,/0,analyzerandCRMpanelpipingsensinglinesandvalvesmaintainthesampletemperatureabovethedewpointanddoesnotexceedtheenvironmentallyqualifiedtemperatureofthetargetrocksolenoidcontainmentisolationvalve.II.No.TheactiontoreducethewattsperfootappliedbytheheattracetoimprovetheheattracecontrolsystemontheH,/0,analyzerandCRMpipingandinstallinsulationblanketsonthetargetrocksolenoidvalvesdoesnotcreatethepossibilityforanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR.III.No.TheReactorCoolantLeakageDetectionSystemasidentifiedintheTechSpecsisrequiredtomonitoranddetectleakagefromthereactorcoolantpressureboundary.Thisactiondoesnotaffectthedetectionsystem'sabilitytoperformitsfunction.

/ERIN.:91-021RREFEREE:DCP89-9142,Rev.0DERlPTlFHKExpandfireprotectioncapabilitiesoffireprotectionsubsystemWPS-131.SgdMAAR':I.No.Theadditionalfireprotectionprovidedbythismodificationwilldecreasetheprobabilityofamajorfireintheturbineareaandthusdecreasetheprobabilityofaturbinetripwhichmaychanengesafetysystems.Implementationofthismodificationwillincreasetheavailabilityoffireprotectionfortheturbineandcomponentssupportingturbineoperation.II.No.ThemodificationexpandstheprotectivefunctionofWPS-131,andisdesignedinaccordancewiththeoriginaldesigncriteriaandcodesimposedontheoriginalequipment.III.No.Sinceweareaddingtothefireprotectioncoverageoftheturbineandauxiliaries,themarginofsafetyisincreased.$ER~.:91-022RREFERENKDCP89-9169,Rev.0DERlPTlFHANK'xpandfireprotectioncapabilitiesoffireprotectionsubsystemWPS-231.+I~~RY:I.No.Theadditionalfireprotectionprovidedbythismodificationwilldecreasetheprobabilityofamajorfireintheturbineareaandthusdecreasetheprobabilityofaturbinetripwhichmaychallengesafetysystems.Implementationofthismodificationwillincreasetheavailabilityoffireprotectionfortheturbineandcomponentssupportingturbineoperation.H.No.ThemodificationexpandstheprotectivefunctionofWPS-231,andisdesignedinaccordancewiththeoriginaldesigncriteriaandcodesimposedontheoriginalequipment.III.No.Sinceweareaddingtothefireprotectioncoverageoftheturbineandauxiliaries,themarginofsafetyisincreased.

PMR89-9174,Rev.0InstallemergencylightingforTechnicalSupportCenter.I.No.EmergencylightingunitsarebeingaddedtoprovideiHuminationattheTSCduringastationblackoutandwillnotinterferewiththelogiccontroloroperationofanysafety-relatedplantsystemorcomponents.ILNo.Byassuringthattheelectricalcoordination,separationrequirements,dieselgeneratorloading,voltagedrop,circuitryampacityandseismicdesignrequirementsandlimitsaremet,thepossibilityforanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR,isnotcreated.III.No.Thecircuitbreakerforthepowerfeedtotheindividualemergencylightingunitsiscoordinatedwithupstreamdevices.Voltagedropandloadampacityarewithindesignlimitsasanalyzed.Therefore,thismodificationdoesnotreducethemarginofsafetyasdefinedinthebasisforanyTechnicalSpecification.$ER~.:91-024RREFESCPJ891005,Rev.0IncreasetheHPCIturbinehighexhaustpressuretripsetpointfrom75psigto110psigforUnit2.I.No.Thesetpointchangewilldecreasetheconsequencesofanaccident(LOCA),becausethehigherpressuresetpointwilldecreasetheprobabilitythattheHPCIturbinewillbetrippedasaresultofhighsuppressionchamberpressureduringaccidentconditions.II.No.Themalfunction(failure)oftheHPCIsystemisconsideredunderthesinglefailurecriteria;therefore,amalfunctionthatresultsinaprematureturbinetriporafailuretotriptheturbineonhighexhaustpressurehasbeenevaluated.III.No.SincethissetpointchangeonlyaffectsanequipmentprotectionfunctionanddoesnotchangetheoperationoftheHPCIsystem,thechangewillnotreducethemarginofsafetyofanysystemasdefinedinthebasisoftheTechnicalSpecifications.

ggR~7.:91-025:SCPJ882032,Rev.0IncreasetheHPCIturbinehighexhaustpressuretripsetpoint,from75psigto110psigforUnit1.I.No.II.No.III.No.Thesetpointchangewilldecreasetheconsequencesofanaccident(LOCA),becausethehigherpressuresetpointwilldecreasetheprobabilitythattheHPCIturbinewillbetrippedasaresultofhighsuppressionchamberpressureduringaccidentconditions.Themalfunction(failure)oftheHPCIsystemisconsideredunderthesinglefailurecriteria;therefore,amalfunctionthatresultsinaprematureturbinetriporafailuretotriptheturbineonhighexhaustpressurehasbeenevaluated.SincethissetpointchangeonlyaffectsanequipmentprotectionfunctionanddoesnotchangetheoperationoftheHPCIsystem,thechangewillnotreducethemarginofsafetyofanysystemasdefinedinthebasisoftheTechnicalSpecifications.~EE~).:91-026:NL-91-002,Rev.0;TP-249-040ThisprocedureinstallstestequipmenttomonitortheRHRsystempipingpressureandreliefvalveactuations.MR:I.No.II.No.III.No.~~Thepressuremonitoringinstrumentationwillremainisolatedfromthemainprocesspipinginstrumentationduringnormalplantoperationthroughtheuseofnormallyclosedisolationvalves.ThePSVactuationmonitoringinstrumentationis100%passiveinthatitmonitorsflowoutofthereliefvalvedischargepipingthroughtheuseofwaterflowswitchesandchangestatetoindicatereliefvalveactuation.AleakdifferentfromthosealreadyanalyzedintheFSARisonlypossiblewhen.thisprocedureisactuallybeingperformedatwhichtimethetestdirectorwillbelocatedattheinstrumentracksandanyproblemcouldbeisolatedimmediatelyandreporteddirectlytothecontrolroom;shutdowncoolingcouldremaininservicewithoutanyeffect.Allcontainmentisolationfeaturesandtheshutdowncoolingisolationsremainoperablethroughouttheentiretesting.Thisinstrumentationinstalledwillbeseparatefromallotherpermanentplantinstrumentation.

DCP89-9102,Rev.0ReplacetheexistingUnit1AutomaticPriorityInterrupt(APQdetectedcircuitofthedisplaycontrolsystemintheplantcomputerwithanimproved,morereliabledesign.OnlythehardwaredesignoftheAPIdetectcircuitwillchange.I.No.G.No.HI.No.\TherephcementoftheAPIdetectcircuitintheplantcomputersystemdoesnotincreasetheprobabilityorconsequencesofanaccidentsincetherearenosafety-relatedsystemsintheplantcomputerroom.Theplantcomputersystemisnotessentialforsafeshutdownoftheplantandservesnoactiveemergencyfunctionduringoperations.Improvingthedesignoftheswitchingdetectioncircuitwillenhancetheoperationofthedisplaycontrolsystem.Thismodificationdoesnotchangethedesigncriteriaforanysafety-relatedsystemorfunctionasdescribedintheFSAR.Theintentofthemodificationistoimprovetheoperabilityofthedisplaycontrolsystemand,thereby,increaseoperatorconfidenceandmarginofsafety.1$jggj~.:91-028DCP89-9103,Rev.0DERIHAE:ReplacetheexistingUnit2AutomaticPriorityInterrupt(APQdetectedcircuitofthedisplaycontrolsystemintheplantcomputerwithanimproved,morereliabledesign.OnlythehardwaredesignoftheAPIdetectcircuitwillchange.RY:I.No.II.No.III.No.~~ThereplacementoftheAPIdetectcircuitintheplantcomputersystemdoesnotincreasetheprobabilityorcon~uencesofanaccidentsincetherearenosafety-relatedsystemsintheplantcomputerroom.Theplantcomputersystemisnotessentialforsafeshutdownoftheplantandservesnoactiveemergencyfunctionduringoperations.Improvingthedesignoftheswitchingdetectioncircuitwillenhancetheoperationofthedisplaycontrolsystem.Thismodificationdoesnotchangethedesigncriteriaforanysafety-relatedsystemorfunctionasdescribedintheFSAR.Theintentofthemodificationistoimprovetheoperabilityofthedisplaycontrolsystemand,thereby,increaseoperatorconfidenceandmarginofsafety.

RREFEREE:DCP90-DERIPTIFHE:~ERl~.:91-0293010,Rev.0ReplacetheexistingRCICtestvalve(HV-249F022)internalswithspecicallydesignedthiottlinginternals.Thiswillpermitthevalve.topassratedflowduringboththehighandlowpressuresurveillancetestwithnoexcessivevibration.I.No.II.No.HI.No.Thismodificationdoesnotaffecttheabilityofthevalvetoclose,'rstayclosed,asrequiredtosupportRCICinjectiontotheReactorPiessureVessel(RPV).ThismodificationwillenhancetheabilityoftheRCICfullflowtestvalvetoperformitstestingfunctionatthe150psisurveillancetest..ThisvalveisrequiredtogoclosedonaRCICinjectionsignaliriordertoinjecttotheRPVduringanaccident.Thenewremachinedthrottlingtriminstalledbythischangeenhancesthethrottlingcapabilityofthevalveandhasnoadverseeffectonthevalve'sclosingability.Thevalvesfullopentofullclosedcycletimehasnotchanged.ThesafetyrelatedfunctionofthisRCICvalveistoremaininitsnormallyclosedpositionoractuatetotheclosedpositionifthevalveisinthethrottledopenpositionduringtheTechSpecrequiredsurveillancetest.Ineithercasethemarginofsafetyisunaffectedsincethenewinternalshavenoeffectontheabilityofthevalvetoclose.JERKIN).:91-030RREFEREE:SCPE911001,Rev.0HAChangethesetpointsforexistingClass1E250VDCsystemovervoltageandundervoltagerelaysforUnit2.KMhQRY:I.No.H.No.III.No.~~The250VDCsystemprovidesreliableandcontinuouspowertosafetyrelatedpumps,valves,andpowersupplies.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedintheFSAR.AfailureoftheserelaysdoesnotpreventtheClass1E250VDCsystemfrommeetingitsminimumperformancerequirements.Avoltagehigherthanthealarmsetpointof288VDCisindicativeofabatterychargerproblemorfailure.TheeffectsofabatterychargerfailurehavebeenevaluatedaspartoftheFSARsinglefailureevaluation.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E250VDCsystem.Further,thissetpointchangepackagedoesnotcauseafailureoftheClass1E250VDCsystem.

~ER~N.:91-031RREFE:SCPE911004,Rev.0EoChangethesetpointsforexistingClass1E125VDCsystemovervoltageandundervoltagerelaysforUnit2.SIMEARY:I.No.H.No.IH.No.The125VDCsystemprovidesreliableandcontinuous'controlandindicationpowertoisolationvalves,circuitbreakers,inverters,annunciators,andotherloadssuppliedfromthe125VDCClass1Eandnon-Class1Edistributionpanels.Afailureoftheserelaysto'alarmdoesnot'causeadecreaseincorecoolanttemperatureoranyotherpotentialaccident.AfailureoftheserelaysdoesnotpreventtheClass1E125VDCsystemfrommeetingitsminimumperformancerequirements.Avoltagehigherthanthealarmsetpointof144VDCisindicativeofabatterychargerproblemorfailure.TheeffectsofabatterychargerfailurehavepreviouslybeenevaluatedaspartoftheFSARsinglefailureevaluation.Thissetpointchangepackagedoes'notaffecttheoperationoftheClass1E125VDCsystem.Further,thissetpointchangepackagedoesnotcauseafailureoftheClass1E125VDCsystem.~E~.:91-032RREFEREE:SCPE911009,Rev.0DERIFHAE:ChangethesetpointsforexistingClass1E250VDCsystemovervoltageandundervoltagerelaysforUnitl.SUbLhfARY:I.No.H.No.IH.No.~~The250VDcsystemprovidesreliableandcontinuouspowertosafetyrelatedpumps,valves,andpowersupplies.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedintheFSAR.AfailureoftheserelaysdoesnotpreventtheClass1E250VDCsystemfrommeetingitsminimumperformancerequirements.Avoltagehigherthanthealarmsetpointof288VDCisindicativeofabatterychargeproblemorfailure.TheeffectsofabatterychargerfailurehavebeenevaluatedaspartoftheFSARsinglefailureevaluation.ThissetpointchangepackagedoesnotaffecttheoperationoftheClasslE250VDCsystem.Further,thissetpointchangepackagedoesnotcauseafailureoftheClass1E250VDCsystem.

QlRgg.:91-033:SCPE911010,Rev.0ChangethesetpointsforexistingClass1E125VDCsystemovervoltageandundervoltagerelaysforUnit1.I.No.II.No.HI.No.The125VDCsystemprovidesreliableandcontinuouscontrolandindicationpowertoisolationvalves,circuitbreakers,inverters,annunciators,andotherloadss'uppliedfromthe125VDCClass1Eandnon-Class.lEdistributionpanels.~Afailureoftheserelaysto'alarmdoes'otcausea'e'cieaseincoiecoolanttemperatureoranyotherpotentialaccident.AfailureoftheserelaysdoesnotpreventtheClass1E125VDCsystemfrommeetingitsminimumperformancerequirements.Avoltagehigherthanthealarmsetpointof144VDCisindicativeofabatterychargerproblemorfailure.TheeffectsofabatterychargerfailurehavepreviouslybeenevaluatedaspartoftheFSARsinglefailureevaluation.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E125VDCsystem.Further,thissetpointchangepackagedoesnotcauseafailureoftheClass1E125VDCsystem.JgRPg).:91-034RREFERE:DCP90-3072,Rev.0ERlPTIFHAAddone2"ballvalvetoeachESWlinereturningfromthe"A"and"B"DxCoolers.RemovecurrentlyinstaHedorificeplates.JVMhfARY:I.No.H.No.III.No.~~ThemodificationdoesnotcreateanyfunctionalchangestotheoperationoftheESWsystemnordoesitaffectanyactivesystemcomponents.Thismodificationessentiallysubstitutesavalveforashortsectionofpipehavingthesamepressureboundaryclassification.Thevalveispreventedfromchangingpositionduetovibrationbyapositivelockingmechanism.ThemodificationdoesnotaffectthefunctionortheoperationoftheESWsystemoranysystemrelyingonESW.Specificallythe2"ballvalvewillbeusedinsteadoftheexistingfloworificetolimitthemaximumflowtotheDxcoolerswhileensuringthattheminimumflowrequirementisalsomet.Theadditionofthe2"ballvalvedoesnotimpairtheabilityofthesystemtoprovideminimumcoolingcapacitybecausethevalvemaybepositionedtopermitthesamepressuredropastheexistingfloworifice.

/gal.gQ.:91-035:DCP90-3075,Rev.0InstallahighlyaccurateultrasonicflowmonitoringsystemforboththeUnit1,96inchpipessupplyingcirculatingwatertothecondenser.I.No.ThisinstallationdoesnotmateriallyaffectthedesignfeatureslistedintheFSAR.ItisjudgedthatanyincreaseinprobabilityduetothesimpleadditionofcomponentswithintheCirculatin'gWaterpipingisentirelyboundedbytheuncertaintypresentinthecalculationoftheprobabilityofoccurrence.II.No.TheinstallationofanultrasonicflowmonitoringsystemontheinteriorwallsofthecirculatingwaterpipesandcablepenetrationassembliesthroughthepipesisslightlydifferentthanexistingSusquehannaflowmeasurementdesign.However,aslongasthetranducers,pullboxes(andshields),andpipingareweldedontothepipesperPP&LSpecificationandASMESectionIX,thereshouldbenoconcernwiththeultrasonicflowmonitoringsystemaffectinganothercomponentorsystem.III.No.~~Thismodificationaffectsthecirculatingwatersystemwhichhasnosafety-relatedfunction.Inparticular,flowmeasurementofcirculatingwaterhasnodirectinterfacewithanysafetyfunctionintheplant.JEER~.:91-036FERE:DCP90-9080ERIPTIFAE:Toreinstatethefeedwaterheaterhighlevelalarmwhichwasdisconnectedbyabypasswhichwasinitiallyinstalledtoalleviateanuisancealarmonalocalpanel.AY:I.No.II.No.IH.No.~~Thereconnectionofalocal.alarmfunctiondoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafety,aspreviouslyevaluated.Thismodificationenhancesthefeedwaterheaterlevelcontrolsbyprovidingtheoperatoranalarmonrisingwaterlevel.Thismodificationaddsnonewfunctiontothefeedwaterheaterventsanddrainsnordoesitremoveanyfunctionofthesystem.Thismodificationonlyreinstatesalocalalarmfunction.

/gal.~.:91-037RREFEREE:DCP91-9001Athru0,Rev.0ReplaceUnit2Class1EOversized125VDCCircuitBreakers.I.No.Thereplacementbreakersareidenticalreplacementsfororiginalequipmentexceptthatthetripratingsmatchthederatedampacitiesoftheconnectedcablesinordertominimizetotheextentpracticabletheeffectsofasustainedlimitedmagnitudefault.II.No.SeeIabove.;installationofproperlysizedanddedicationtestedreplacementbreakerswillnotmodifythesafetyfunctionsofthesystemloads.HI.No.pe$ER~.:91-038Thisactiondoesnotmodifythefunctionorcapacityofanyconnectedsafetysystemandwillincreasetheprobabilityofsafetysystemsremainingfunctionalintheeventofasustainedlimitedmagnitudefaultabovethecableampacitybyoningtheaffectedcircuit.EFERE:NL90-029,Rev.0DERlFHANE:EvaluateuseoftheTemporaryLaundryFacilitytosort,store,shipandreceiveprotectiveclothing.JQMMARY:I.No.TheTemporaryLaundryFacilityisastandalone,temporaryfacility.Thefacilityhasnosafety-relatedfunctions,andthefacilitydoesnotinterfacewithanysafetyrelatedsystems.Sincethelaundrytrailersdonotplayacriticalroleinplantoperations,theiroperationdoesnotincreasetheprobabilityorconsequencesofanaccidentormalfunction.II.No.AccidentanalysesintheFSARarenotperformedforscenariosinvolvingtheprocessingofcontaminatedprotectiveclothing.III.No.SeeI.above.ThefacilitydoesnotinterferewithanyothersystemorcomponentgovernedbyTechnicalSpecifications.

NL-91-003,Rev.0EoEstablishacontrolzonebreakareafortheUnit2generatorrewindproject.KMLY:I.No.H.No.III.No.Thebreakareafortheturbinerewindprojectwillbeastandalonestructurelocatedone1..729'ftheunit2turbinedeck.Thisnon-safetyrelatedstructurecontainsnosafety-relatedequipmentorradwasteequipmentwhosefailurewaspostulatedintheaccidentanalysisoftheFSAR.Thedesignandlocation,ofthebre'akareaprovidesanareawithinthe'ontrolledZonewhichismaintainedfreeofcontamination.Extensiveadministrativecontrolshavebeeninvokedtoensurepersonnelandmaterialsenteringthisfacilityarenotcontaminated.Thistemporaryeating,drinkingandsmokingareawill,therefore,bemaintainedfreeofcontaminationasrequiredbytheFSAR.NorequirementsapplicablefortemporarybreakareasarecontainedwithinTechnicalSpecifications.~E>~Q.:91-040REE:DCP89-3021C,Rev.1DERIImproveHeatTraceControloftheUnit2ContainmentAtmosphereControlValves(CAC).KMILF:I.No.ThisactionassuresthattheheatappliedtotheH,O,analyzerandCRMpanelpipingsensinglinesandvalvesmaintainsthesampletemperatureabovedewpointanddoesnotexceedtheenvironmentallyqualifiedtemperatureofthetargetrocksolenoidcontainmentisolationvalves.Thispermitstheanalyzers,panelsandisolationvalvestoperformtheirintendedsafetyfunctions.II.No.Theactiontoreducethewattsperfootappliedbytheheattrace,toimprovetheheattracecontrolsystemontheH,O,analyzerandCRMpiping,toreworkorremovetheheattracefromtheCACtargetrocksolenoidisolationvalvesand.installinsulationblanketsonthesolenoidvalvesdoesnotcreatethepossibilityofadifferenttypepreviouslyevaluatedintheFSAR.III.No.Thisactiondoesnotaffectthedetectionsystem'sabilitytoperformitsfunction;anddoesassureoperabilityofthevalvestomeettheirisolationfunctionbymaintainingthevalvetemperaturesbelowtheirenvironmentallyqualifiedlimit.

$ER~.'.91-041RREFE:DCP89-9152A,B&C,Rev.0ReplacetheexistingUnit2RHRPumpSealwithanew"Hot"sealwhichdoesnotrequireanyexternalcoolingmedium.I.No.Theperformanceofthenew"hot"sealwillnotincreasetheconsequencesofanaccident.Thenewsealis.expected.toleaknomorethantheexistingdesignundernormalandaccidentconditions.ThenewsealdesignhasnoimpactontheabilityoftheRHRpumptoprovideLPCIorcontainm'entcoolingflow.II.No.Thenewsealwillnotincreasethepotentialforasealfailureincident.ThesealisdesignedtowithstandthemaximumRHRtemperatureconditions,withoutcooling,anddesignedgenerallyincompliancewiththeoriginalpumpspecifications.ThenewsealshalleliminatetheRHR/ESWinterfacethustendingtosimplifytheoperationofthesystemsandreducethepotentialforoperationalerrororradioactivereleasestotheenvironment.III.No.Thisactionwillnotcompromisetheassumptionsusedintheaccidentanalysis,~~~~~~~~~~~~~~~~~~norinvalidatetheexistingintegrityofthecontainmentsystemtocontrolreleaseofradioactivematerialstotheenvironment.$~~.:91-042:DCP89-9177,Rev.0RepairandrestoretotheoriginaldesignconditionaplatformlocatedintheUnit2TurbineBuilding.SIMfSRRI.No.Thisplatformisclassifiedas"other"safetyclass(FSARTable3.2-1)andnoequipmentimportanttosafetyislocatedinthevicinityofthisplatform.II.No.Sincetherepairofthisplatformeffectivelyreplacesthestructurewhichwaspartiallydismantledduringapreviousmodification,thisactiondoesnotcreatethepossibilityofanaccidentnotpreviouslyevaluated.III.No.SeeI.andII.above.~~~~~

$ER~.:91-043DCP90-3076,Rev.0InstallFlangesforUnit2ContainmentInstrumentGasSystem.I.No.II.No.Thismodificationonlyinstallsflangesinexistingpipinginordertofacilitateeasiermaintenanceofsafetyrelatedcheckvalves.Thepipingincludingthenewflangeswillremaininconformancewithallrequirementsas'originallydesigned.Thismodificationdoesnotalterthefunction,changetheoperationorintroducenewfailuremodesfortheContainmentInstrumentGasSystem,theMSIVsoranyothersafetyrelatedcomponents.III.No.Sincethismodificationdoesnotalterthefunctionortheoperationofanysafetyrelatedsystems,themarginofsafetydefinedinthebasisoftheTechnicalSpecificationisnotreduced.$gRggP.:91-044:DCP90-3077A&B,Rev.0AE:StandbyGasTreatmentCircuitsVoltageImprovementModificationUnit1.SUMMARY:I.No.Thepurposeofthismodificationistoprovidearesolutiontotheexistingvoltagedropcondition.Parallelingexistingcableswiththesparecableswillresultinimprovedvoltagewhichwillincreasereliabilityofthestandbygastreatmentcircuits.II.No.Thismodificationdoesnotaffecttheoperationofthestandbygastreatmentsystemoranyrelatedequipment.Itincreasesthereliabilityoftwocircuitsasaresultofthevoltagedropdecrease.III.No.SeeI.andII.above.

$ER~.:91-045DCP90-9052,Rev.0InstalladesktoptypeofpublicaddressstationintheHealthPhysicsaccessareaonthesouthendoftherefuelfloor-Unit2.I.No.II.No.IH.No.8ComponentsandconduitinstaHedbythismodificationarelocatedonUnit2refuelflooratthesouthend.ThemajorityofequipmentwillbeinstalledwithintheHealthPhysicsaccessareaandtheremainingconduitandterminalboxatapproximately'Col.Q-37.4.Neitherareaincludessafety-relatedcomponentsthatwillbeimpactedbythismodification.TheadditionofthedesktopPAtotheHealthPhysicsaccessareawillenhancetheabilityofthesystemtoperformitsprimarydesignrequirementsofprovidingnormalandemergencyintra-plantcommunications.NonewunanalyzedtypeofmalfunctionismadeprobablebythemodificationandrelocationofthesePAcomponents.Thecommunicationcapability,asdescribedinTechSpecBases,isnotaffectedbythechangestobeincorporatedbythismodification./BRAN.:91-046:DCP91-3001,Rev.0DERIFNE:ProvidestherequirementsforthestorageofspentcontrolbladesintheUnit2SpentFuelPool.SfEKILYI.No.H.No.III.No.Forthelong-termstorageofcontrolbladesaddressedbythismodification(seismic/hydrodynamicloadsapply),amaximumoftwocontrolblades(attachedtoslingassemblies)perbracketisrequired.Thisassuresthatthestructuralintegrityoftheexistingbracketsismaintainedforlong-termstorageofcontrolblades.Controlbladebangingwillnotcausemalfunctionorfailureofanysafety-relatedcomponents.Therefore,thebangingofcontrolbladesdoesnotrepresentanewunanalyzedtypeofmalfunctionoraccident.Thismodificationdoesnotimpacttheacceptancelimit(1100pounds)sincetheweightofacontrolblade(215pounds)plustheslingassembly(10poundsJ)ismuchlessthanthe1100poundlimit.

91-047:DCP91-9010A&Band91-9011A&B,Rev.0MakephysicalchangestotheReactorBuildingHVACdamperactuatorassembliessothattheymaybelockedintheirnormaldesignoperatingposition.I.No.II.No.III.No.Thismodificationremovesthe"RefuelMode"operationofthesedampers.Operatingunderthismodeduringplantrefuelinghasresultedinundesirablecontamination'pioblemsduetounfainiliarandunpredictableairflowpatternsontherefuelingfloor.Aslongaswemeetthesecondarycontainmentbreakdownandinleakagerequirements,thedamperpositionhasnoimpactonanydesignb'asisaccident.Thechangesand/orfailuremodesassociatedwiththechanges,havenoimpactonthefunctionandperformanceofthesafetyrelatedsystems(R.B.RecirculationFanandSGTS).Thechangesdonotmodifytheplantresponsetoanydesignbasisaccident.Thesemodificationsassurethatthesecondarycontainmentintegritycanbemaintainedbylockingtheabovedampersintheirdrawdowntestposition.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.DER.M-'1-048:NL-91-004,Rev.0;TP-016-006DIPumpdownofBLoopRHRSWandESWpiping.SlggfkkLYII.No.III.No.~~ASafetyImpactAssessmentwascompletedtoanalyzetheaffectsofremovingtheBLoopESWandRHRSWsystemfor7daysandwasfoundtobeacceptable.DrainingandrefillingoftheBLoopESW/RHRSWpipingwillbeaccomplishedunderthisprocedurewithinthe7dayLCOwindowandthisdoesnotimpacttheSafetyImpactAssessment.TheTBCCW/RBCCWheatexchangersarenon-essentialheatexchangersandremovingabackupcoolingsourcewillnotaffectsafeshutdownoftheplant.NorequiredECCSsystemswillberenderedinoperablebythisprocedure.Secondarycontainmentintegritywillbeadequatelycontrolled.OperabilityoftheRHRSWloopwillbemaintained.OperabilityoftheARHRSWsystem,ECCSsystems,secondarycontainmentintegritywillnotbeaffectedbythisprocedure;thusmarginofsafetywillnotbereduced.

SCP-J9-1015A&B,Rev.0Increasethesetpointofthe"instrumentfailure"functionoftheflowswitchesinstalledintheHVACductsintheControlStructure.I.No.Implementationofthissetpointchangehasnoaffectonthefunctionsoftheequipmentotherthantoimprovethereliabilityofthelow-flowswitches.Theincreasedreliabilityisachievedbypreventingerroneoustripsofthelow-flowswitchesduringnormalflowconditions.ThisresultsinacorrespondingincreaseinthereliabilityoftheControlRoomandcontrolStructureHVACsystem.II.No.ThissetpointchangedoesnotaffectthedesignoroperationoftheControlRoomandControlStructurelow-flowswitches,HVACfansortheheater/humidifier.Thischangeincreases'systemreliabilitybyeliminatingthepossibilityoferroneoustripscausedbyfaultyoperationofthelow-flowswitches.III.No.ThischangeincreasesthereliabilityoftheControlStructureHVACsystem,and~~~~therefore,theControlStructureChillers;itdoesnotreducethemarginofsafety.5~V~.:91-050RREREPMR86-7036,Rev.0ReworkthesourceofUnit2FuelPoolMakeupfromDemineralizedWatertoCondensate.+1~ARY:I.No.Thenormalfuelpoolmakeupsourcehasnodirectsafetyrelatedfunctionandisdesignedonlytoprovideonesourceofmakeupwaterforthefuelpoolsevaporativelosses.Thismodificationwillnotimpactanysafety-relatedequipmentasdefinedinthe'FSAR.II.No.SeeI.above,thenormalfuelpoolmakeupoperationisbackedupbytwoindependentsafety-relatedESWmakeupsources.III.No.Thismodificationdoesnoteffectthesafetyfunctionofanycomponentsassociatedwiththefuelpoolsorfuelpoolcoolingsystem.

0

'I91-06,Rev.0;TP-234-040Unit2ReactorBuildingHVAC,ECCSandRCICPumpRoomCoolerReplacementCoilAcidFlushandFincleaning.I.No.Theacidfiushandfincleaningdoesnotalterthefunctionortheperformanceofthesesafety-relatedsystems.Itwillrestoretheintegrityanddesigncoolingcapabilityofthereplacementcoils.II.No.Theintegrityandheatremovalcapabilityofthereplacementcoo1ingcoilisrestoredbytheacidflushandfincleaning.Thisdoesnotalterthefunctionortheperformanceofanysafety-relatedsystem.III.No.Thiscleaningdoesnotreducetheoperabilityofanyequipmentanditdoesnotrequireanyadditionalsurveillancetoensureplantsafety.Thisdoesnotchangethefunctionandperformanceofanysafety-relatedsystem.ggg.ggl.:91-052:NL-91-008,Rev.0;TP-283-013DERlP17FElectricallyoperateandbackseatthe1.0inchDripLegDrainBypassValveontheUnit2MainSteamBypassHeader.I.No.Whilethisproceduremayresultinasmallincreasedriskofanoperationaltransientduetoavalvemechanicalfailure,itdoesnotaffectequipmentimportanttosafety.Thisvalveisopenandremainsopenunderallnormalplantevolutionsandbindingofthisvalveintheopenpositioncausesnooperationalconcerns.II.No.Failureofthevalvebonnetisevaluatedasasmallpotentialriskduringthebackseatingevolution.Ifaruptureweretooccur,sufficientindicationofadverse'adiologicalorphysicalconditionsisavailabletoenablepromptoperatoractiontomitigatetheconsequencesoftherupture.III.No.Thisvalveisnotasafety-relatedcomponentandisnotaddressedinTechSpecs.~~~~

/BRhQ.:91453R:NL-91-06,Rev,1;TP-234-040Unit2ReactorBuildingHVAC,ECCSandRCICPumpRoomCoolerReplacementCoilAcidFlushandFinCleaning.I.No..Theacidflushandfincleaningdoesnotalterthefunction'ortheperformanceofthesesafety-relatedsystems.Itwillrestoretheintegrityanddesigncoolingcapabilityofthereplacementcoils.II.No.Theintegrityand'heatremovalcapabilityofthereplacementcoolingcoilisrestoredbytheacidflushandfincleaning.Thisdoesnotalterthefunctionortheperformanceofanysafety-relatedsystem.III.No.Thiscleaningdoesnotreducetheoperabilityofanyequipmentanditdoesnotrequireanyadditionalsurveillancetoensureplantsafety.Thisdoesnotchangethefunctionandperformanceofanysafety-relatedsystem./galgg7.:91-054RREREE:DCP90-9032A,Rev.0DERlPTIAE:Todeletethealarm,"CondenserA,B,CHIConductivity",inControlRoomPanel2C651.I.No.II.No.Conductivitymonitoringwillcontinuetoprovidetubeleakorrupturedetectionthroughtheinstalledconductivitycellsinputtorecorders,localalarmsanddemineralizerinletmonitors.Theconductivitymonitoringisnotrequiredtoaidinthemitigationofadesignbasisaccident.lCondensertubeleaksaremonitoredbytheexistingconductivityelementsanddataisinputtorecordersandlocalpanelalarms.Therefore,removaloftheremotealarmwillnotcreatethepossibilityforanaccidentormalfunctionofadifferenttypethananypreviouslyevaluatedintheFSAR.~~III.No.TheTechnicalSpecificationbasesarenotaffectedbythismodificationandthusthemarginofsafetyisnotreduced.

$gR~Q.:91-055R:DCP90-9077,Rev.0SeparatetheNon-Class1ELimitSwitchesfromtheClass1ERBCCWValveControlandPositionIndicationCircuitry.I.No.Theoperationofthelimitswitchesisnotrequirodforasafetyfunction.Afailureoftheswitchescouldonlyresultinerroneousvalvepositionindication.Thefailuredoesnotcompromiseasafetyrelatedsystem'orcomponent.Also,thepresentfail-safeoperationoftheESWvalvesisnotchanged.TheaffiliatedcablesandinternalwiringoftheMDRisolationrelaycircuitrycontinuetobesubjectedtothesameseparationrequirementasClass1EcablesandwiringinaccordancewithPP&LSpecificationE-1012.II.No.Theactiontoseparatethenon-Class1EServiceWaterValveLimitSwitchesfromRBCCW-ESWvalvecontrolandpositionindicationcircuitrydoesnotadverselyaffecttheoperationoftheESWsystemvalvesanddoesnotimpacttheoperationoftheClass1Eelectricalsystem.ThepresentfailsafetyoperationoftheESWvalvesisnotchanged.III.No.TheEmergencyServiceWaterSystemensuresthatsufficientcoolingcapacityisavailableforcontinuedoperationofsafety-relatedequipmentduringnormalandaccidentconditions.ThisactiondoesnotaffecttheoperabilityorcapacityoftheESWsystemnorintroduceanynewmodeofoperation.

~SRNo.!91456:DCP90-9078,Rev.0UpgradetheUnit2TBCCW-ESWValveControlandPositionIndicationCircuitryfromaffiliatedtoClasslEandtoseparatethenon-Class1ElimitswitchesfromtheControlandPositionIndicationcircuitry.jI.No.II.No.III.No.ThelimitswitchesontheSWSvalvesonlyprovideposition'indicationthroughtheMDRisolationrelaystotheTBCCW-ESWvalvecontrolandremotepositionindicationcircuitry.Theoperationoftheunitswitchesisnotrequiredforasafetyfunction.AMureoftheswitchescouldonlyresultinerroneousvalvepositionindication.Thefailuredoesnotcompromiseasafetyrelatedsystemor.component.Sincethepilotsolenoidvalves,limitswitchesontheESWvalves,handswitches,auxiliaryrelays,lights,resistors,terminalblocksandfusesarecontinuingtobeClass1Edevices,thepresentfailsafeoperationoftheESWvalvesisnotchanged.TheEmergencyServiceWaterSystemensuresthatsufficientcoolingcapacityisavailableforcontinuedoperationofsafetyrelatedequipmentduringnormalandaccidentconditions.ThisactiondoesnotaffecttheoperabilityorcapacityoftheESWsystemnorintroduceanynewmodeofoperation.~ER~.:91-057RREFEDERIPTl:NL-91-007,Rev.0;OP-205-004&OP-205-005AEMaintainUnit2ReactorBuildingZoneIUIIIVentilationoperablebytemporarilypoweringselectedsafetyrelatedZoneII/IHventilationdamperschemes.R:I.No.II.No.III.No.~~Thistemporarypowerisprovidedfromthesamedivisions,isreliableClass1Epower,andwillbeavailable,duringthebusoutages.Therearenofailuremodedifferencesbetweenthepermanentandtemporarypowersources.ThistemporaryconfigurationissubstitutingthenormalClass1Epowersourcewithanothersourcefromthesamedivision.ThisapplicationoftemporarypowerallowsUnit1tooperatebykeepingtheUnit2ZoneIIIventilationsystemoperableduringthe4Kvbusoutages.TheinstallationoftemporaryClass1Epowersupplydoesnotpreventanydesignsafetyfunctionofsafetyrelatedequipment.ThepowersupplyhasbeenanalyzedandshowsthatutilizationoftemporaryClass1EpowersourcesdoesnotdegradetheZoneII&IIIReactorBuildingHVACsystembelowanacceptablelevel.

~ERjg7.:91-058'NL-91-009,Rev.0;TP-241-007Unit2MainCondenserDescaling.I.No.II.No.III.No.TheMuremodeassociatedwiththe.cleaningprocessisdegradationof'irculating/servicewatersystemcomponents.Thecleaningchemicalswillnotcausedegradationtosystemmaterialsorcomponents.Thefailuremodeassociatedwiththisprocedurewillnotbeaninitiatingeventforanydesignbasisaccident.Thetubecleaningprocesswillnothaveanyadverseeffectsonanymaterialsinthesystem.Thechemicalproductusedforcleaningthecondensertubeswillnotadverselyimpactorcompromisethelifeofanymaterialstheproductswillcontact.Thereisnochangetothedesignbasisandthereisnotimpactontheoperationofanysystemsintheplantasaresultofthecleaningoperation.SeeI.EcII.above.$~~.:91-059DCP90-3071,Rev.0DERIInstallaReplacementActuatorforRHRSuctionIsolationValveHV-251F004A.$Ql~fARY:I.No.II.No.III.No.Themodificationwillincreasethereliabilityofthisvalvebyinsuringfullclosurewhencalledupontodoso.Thereplacementactuatorwilldelivermorethrusttothevalvestem.Operationalandfunctionalrequirementswillremainunchanged.ThemodificationisintendedtoimprovetheisolationintegrityfunctionoftheRHRF004Avalvebyprovidingtherequiredactuatorthrustnecessarytoovercomevalveinternalresistanceduetoitsdisk/seatanglemismatch.Thevalveisnormallyopenandnochangeofstateisrequiredforaccidentconditions.Themodificationwillnotreducethevalve'sabilitytoremainopen,butwillincreasethevalve'sabilitytofunctionasanisolationpoint.ThemarginofsafetywillnotbereducedinanyoftherequiredfunctionalrequirementsoftheRHRF004Avalve.Thenewactuatorwillinsurethereliabilitytoactasanisolationboundarywhenrequired.

$~R~.:91-060DCP89-9205,Rev.0IncreaseDieselRoomsA,B,C&Dgeneralroomilluminationandcontrolpanellightingtoatleasttherecommendedfoot-candles.I.No.II.No.III.No.Thelightingsystemisdesignedtofurnishilluminationlevelsrequiredforsafeperformanceofplantoperation,security,shutdown,andmaintenance'duties.Theoperationalintegrityandsafetyofthedieselgeneratorsandsubsystemswillnotbecompromisedbythismodification.Thelightingisdesignedtomeetthesamestandards,thustheabilityofthedieselgeneratorsandsubsystemstosatisfythedesignbasesisnotcompromised.Nochangetothelightingsystemfunctionisoccurring.Systeminterfacesareremainingunchangedandnonewaccidentormalfunctionsareintroduced.ThischangedoesnotaltertheabilityofthedieselsystemtoperformitsintendedfunctionandsatisfytheTechnicalSpecificationBasis.Q~Q.:91-061:DCP90-3070,Rev.0AddcomponentsthatprovideauxiliarycontroltothedampercircuitoftheControlStructureHeating,Ventilating,andAirconditioning(CSHVAC)System.I.No.II.No.III.No.Thismodificationisbeingperformedtoensurecompliancewith10CFR50,AppendixR.ThecriteriaofAppendixRrequiresthatequipmentandsystemscomprisingthemeanstoachieveandmaintaincoldshutdownconditionshallnotbedamagedbyfire.ThismodificationdoesnotcreateanyadditionalscenarioswhichcouldpreventtheCSHVACsystemfromfulfillingitsdesignrequirements,eitherfromnormaloremergencyoperation.TheadditionofauxiliarydampercontrollogicmaintainstheredundantHVACsystemsasdescribedintheFSAR.ThismodificationdoesnoteffecttheControlRoomEmergencyOutsideAirSupplySystem(CREOASS)asdescribedintheFSARandthusdoesnotreducethemarginofsafety.

DCP91-9012Mthru91-9012ME,Rev.1ReplaceUnit2Non-1EOversized125VDCCircuitBredms.I.No.II.No.III.No.Thereplacementbreakersareidenticalreplacementsfororiginalequipmentexceptthatthetripratingsmatchthederatedampacitiesoftheconnectedc'ablesinordertominimizetotheextentpracticabletheeffectsofasustainedlimitedmagnitudefault.Installationofproperlysizedanddedicationtestedreplacementbreakerswillnotmodifythenon-safetyrelatedfunctionsofthesystemloads.ThismodificationwillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedintheFSAR.Thisactiondoesnotmodifythefunctionorcapacityofanyconnectednon-safetyrelatedsystemsandwiHincreasetheprobabilityofsystemsremainingfunctionalintheeventofasustainedlimitedmagnitudefaultabovecableampacitybyopeningtheaffectedcircuit.Thislimits,totheextendpractical,damagetoadjacentcablesofothernon-safetysystemsinthesameraceway.ging.~.:91-063:TP-259-013,Rev.0DE1PTIFHNPerforma45psigLLRTontheMSIVsintheaccidentdirection.$Qg~AgF:I.No.II.No.III.No.ThesafetyfunctionoftheMSIVsandtheLeakageControlSystemtoisolatewiththeirappropriatecontainmentisolationsignalwillnotbedegradedwiththerelativelysmallvacuumbeingappliedinsidethetestvolume,andnotrequiredtobeoperableduringthistest.TheMainSteamLine(MSL)Plugswillbepressurizedbelowtheevaluatedpressure.AllrequirementsforuseoftheMSLplugsareincorporatedintotheprerequisitesandflowpathofthisprocedure.Thisprocedurewillincreasethetestpressureto45psigbutthischangewillhighlightactualvalveseatingflawsanddecreasemaintenanceonminimaldefects,whichcanintroducevalveproblems.Theoverallintentistotestprimarycontainmentintegritybyleaktestingpenetrationsataccidentpressure.

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~8~.:91-064:TIP-234-036,Rev.0Tie-InofTemporaryOutageChillerforDrywellCoolingduringUnit2outages.I.No.II.No.III.No.Installationofthistemporarysystemwillnotimpactoperationofprimarycontainmentisolation,theonlysafetyfunctionofRBCWsystem.Normaloperationofthereactorbuildingventilationsystem-will'not'beimpactedbyinstallationofthetemporarychiller.Additionally,thisequipmentwillbeinstalledduringaperiodwhensecondarycontainmentisnotrequired.Theinstallationofthistemporarysystemdoesnotadverselyimpacttheoperationorsafetyfunctionofanyexistinginstalledequipment.SeeI.&II.above.$/)~).:91-065:DCP91-0071,Rev.0Short-termadministrativeeliminationofabypassthatreplacedthenon-pressureretainingpipecap(1/4"dia.weepholeinit)andthereactorrecirculationloop'B'rainlinewithapressure-retainingcap(noweephole)tocontainleakagethroughtheReactorCoolantpressureboundary(RCPB)valves243F051Band243F052B.$gARY:I.No.H.No.III.No.TheadditionofthepipecapactstocontainleakagepasttheRCPBisolationvalvesonly.Thechangedoesnotalterthesystemcontents,functions,orboundariesinanymannerwhichwouldincreasetheradiologicalconsequencesoftheLoss-Of-Coolant-AccidentdescribedinFSAR15.6.5.ThepostulatedfailureoftheHBDpipingdoesnotpresentanewmodeoffailurefortheloss-of-coolantaccidentdiscussedabove.SincethestresslevelsintheHBDpipinghavebeendeterminedtomeetthebreakexemptioncriteria,theprobabilityofoccurrenceofthedesignbasisaccidentdiscussedaboveisconsideredtobeunchanged.Thischangeprovidesatemporary'secondary'ressureretainingboundarydownstreamoftheRCPB/ASMEboundarywhichisintendedtocontainleakageduetonormalwearoftheboundaryisolationvalvesuntilthevalvesarereplacedunderthevalveupgradeprogramduringtheUnit25RIO(underDCP91-9007B).ThetemporaryconfigurationcreatedbythisDCPdoesnotaffecttheexistingboundariesorthebasesfortheTech.Spec.limitsinSection3/4.4.3(3.4.3.2)"ReactorCoolantSystemLeakage".

e

/HARV~.:91-066RREFBKDCP89-9159A,Rev.0llTheproposedchangewillenabletheHPCIStopValvebalancechamberpressuretobemonitoredwhichwillsubsequentlyprovideforoptimumstopvalveadjustmentandoperation.Thismodificationshallpermanentlyupgradeapressuretransmitterloopnowexistingonatemporarybasis.Theoutputfromthepressuretransmitter-willbeusedtoprovideareadoutonGETARS.R:I.No.Theproposedmodificationdoesnotimpactanystationdesignfeaturesthatareusedinradioactivereleaseorlossofcoolantanalysesforpostulatedinstrumenttubingfailures.Failureanalysesfortheproposedchangesareenvelopedbytheaccidentanalyses"InstrumentLineBreak"(FSARSection15.6.2)andMscellaneousSmallReleasesOutsideContainment(FSARSection15.7.2.1).II.No.WorstcasescenariosforanaccidentinvolvinganinstrumenttubingrupturehavebeenconservativelyanalyzedintheFSAR.Theproposedchangedoesnotinvolveachangeinsystemoperationoraddamoreseveretypeoffailuremode.Nonewunanalyzedtypeofmalfunctionismadeprobablebythismodification.HI.No.TechnicalSpecifications3/4.3-Instrumentationand3/4.5-EmergencyCoreCoolingSystemsprovidethebasesandlimitingconditionsofoperationforassociatedplantinstrumentationandtheHPCIsystem.AllinstrumenttubinginstallationwillfollowacceptedstandardsandcodeswiththepotentialforaHPCIlinebreakscenariobeingextremelylowandoffsetbytheincreasedprobabilityofcorrectstopvalveoperationduetotheimprovedmonitoringcapabilityduringadjustment;therefore,themarginofsafetywillnotbereduced.

~.:91-067RREFEE:DCP90-9048,90-9049VSeveralinstancesofblowncontrolfuseshaveoccurredresultinginlossofARIcontrolpower.Blownfuseeventsoccurredasaresultofindicatinglampfailuresin,1CB224A,Band-'CB224A,B.ThepresentARIcontrollogicutilizesafullvoltageindicationlampdesign.Thischangewillreplacethefullvoltagelampwithalowervoltage'lampwitharesistorinseriestoreducetheshortcircuitcurrentandpreventthefusesfromblowing.I.No.AslistedinFSARSection7.2.3,theARIsystemisrequiredtofunctionduringallanticipatedoperatingoccurrencesexceptthoseassociatedwithaLOCA,HELBorSSE.Sincethesemodificationsonlyreplaceindicatinglamps,thetripcapabilityofARIisnotchanged.Electricalseparation,10CFR50AppendixRrequirements,seismicmounting,powersupplyloadingeffectsandotherdesignconsiderationsareincorporatedinthedesignoutputdocuments.II.No.ThesemodificationsaddnonewfunctiontotheARIsystemnordotheyremoveanyfunctionofthesystem.III.No.TechnicalSpecificationsection3/4.1.3listsoperabilityrequirementsfortheControlRodDrivemechanisms.Thesemodificationsreducecontrollossassociatedwithindicatinglampfailures,thusincreasingARIsystemreliability.

8E/tNo.!91M8IDCPs91-9001Athru0CertaincircuitbreakersinUnit2125VDCClass1Edistributionpanels2D614,2D624;2D634,'nd2D644havefixedtrippointswhichareoversizedinrelationtoderatedampacitiesoftheconnectedcables.15ofthe16breakersidentifiedrequirereplacementwithbreakershavingtripratings/characteristicswhicharecompatiblewithcablederatedampacities,greaterthanconnectedloadcurrents,.aridcoordiiuMlwithdownstreamsubfuses.I.No.ThefunctionsoftheconnectedloadsystemsarenotmodifiedbythisactionandfailuremodeandeffectsanalysisforthereplacementbreakersisboundedbyexistinganalysisprovidedinFSARTable8.3-21for1D614,1D624,1D634and1D644.II.No.Installationofproperlysizedanddedicationtestedreplacementbreakerswillnotmodifythesafetyfunctionsofthesystemloads.TheproposedmodificationwillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-21.Theproposedactiondoesnotmodifythefunctionorcapacityofanyconnectedsafetysystemsandwillincreasetheprobabilityofsafetysystemsremainingfunctionalintheeventofasustainedlimitedmagnitudefaultabovethecableampacitybyopeningtheaffectedcircuit.Thislimits,totheextentpractical,damagetoadjacentcablesofothersafetysystemsinthesameraceway.TheproposedactiondoesnotaffectanyTechnicalSpecification/Basesanddoesnotreducethe-marginofsafetyasdefinedinthebasisforanyTechnicalSpecification.

sammo.:91-069RNL91-010ThissafetyevaluationanalyzestheuseofNuclearEnergyServices(NES)LPRMBender.TheLPRMbenderisdesignedtoproducea180degreebendatthemidpointofadischargedLPRMstringwhilemaintainingSSES'sminimumshieldingrequirementof5feetaboveanirradiateddetector.TheresultingLPRMstringwillbe"hair-pin"shaped;each-legmeasuringapproximately22feetinlength.AnLPRMofthisshapeallowsforeasystorage/accountabilitywhileplacedovercontrolrodbracketsinthefuelpool.BlMBEZI.No.AFuelHandlingAccidentasevaluatedinFSAR15.7.4and15A(event41)istheonlypostulatedaccidentwhichisapplicabletothisproceduralchange.Theradiologicalconsequencesofdroppingafuelassemblyarewellwithintheguidelinesof1OCFR100.TheeffectsofadroppedLPRMbender/LPRMarewithinthescopeofadroppedbundle.II.No.TheLPRMbenderhasbeenextensivelytestedtoensuretheLPRMintegrityismaintainedduringthebendingprocess.ShouldtheLPRMbreakduringthebendingprocess,halfoftheLPRMwouldfallintothecavity/RPVarea(theotherhalfwouldremainintheLPRMbendersclamp).Anexaminationofthebreakareawouldthenbeperformed,andretrievalofthefallenpieceswouldcommence.Inaddition,theuseoftheLPRMbenderwillnotviolatePP&L's5footshieldingrequirementforLPRM"hotends".Withthebendingelevatorinthefulluppositionandtheoverheadcraneauxhoistinthemaxupposition,theshieldingprovidedoverthetopguideringwillbe5'll"whentheLPRMisfullybent.III.No.FromTechSpec3/4.9.7,CraneTravel-SpentFuelPool,LCO,loadsinexcessof1100poundsshallbeprohibitedfromtraveloverfuelassembliesinthespentfuelstorageracks.SincethecombinedweightofanLPRMbenderandLPRMisonly550pounds,thisproceduraladditiondoesnotimpacttheacceptancelimit.

~ERh+:91-070:DCP90-9008,Rev.0Thechangeinvolvescircuitmodificationsandinstallationofqualifiedisolationdevicestopreventinteractionbetweenthe'class1Eandnon-Class1EportionsofthecircuitsforMainSteamDrain,ReactorWaterCleanup,ResidualHeatRemoval,MainSteamRadiationMonitors.I.No.Althoughtheproposedmodificationinstallsadditionalcomponentstoexistingcontrolcircuitsandinstrumentloops,thereisnoeffectonthedesignbasisofthevarioussystemscoveredbythischange.'heproposedactionprotectsthesafetyfunctionsofclass1Ecomponentsofthevarioussystemsunderconsideration.Itdoesnotchangetheoperationoftheinstrumentationloopsortheplantoperator'sinterfacewiththeseloopsoranyothersafetyrelatedequipment.II.No.ThismodificationprovidesacceptableisolationbetweenClass1Eandnon-Class1EinterfacewiringasdescribedinFSARSection8.1.6.1qanddoesnotcreateapossibilityforanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR.III.No.TheproposedactioninvolveschangestointerfacesbetweenClass1Eandnon-Class1EcircuitsanddoesnotaffectthemarginofsafetyasdefinedinthebasisfortheTechnicalSpecificationofanysafetyrelatedsystem.IthasnodirectimpactontheoperationofthecontainmentisolationvalvesasindicatedinSection3/4.6.3andTable3.6.3-1oftheTechnicalSpecifications.TheisolationactuationinstrumentationrequirementsforRWCUdifferentialflowandRHRflowasindicatedinTable3.3.2-1oftheTechnicalSpecificationarenotaffectedbytheproposedmodification.Similarly,ithasnoimpactonthereactorprotectionsysteminstrumentationformainsteamlineradiationasrequiredbyTable3.3.1-1oftheTechnicalSpecification.Byisolatingnon-Class1Ecircuitcomponentsandrewiringvalvelimitswitches,theproposedactionensuresthatClass1Ecircuits,instrumentloopsandisolationvalvescanperformtheirsafetyfunctionintheeventthenon-class1Einterfacingcircuitsaresubjectedtoimpressedvoltagefaults.

DCP91-9012,Rev.2Thischangereplacescertainnon-1EbreakersinUnit2125VDCnon-1Edistributionpanels2D615,2D625,2D635,and2D645havingfixedtrippointswhichareoversizedinrelationtoderatedampacitiesoftheconnectedcables.I.No.II.No.III.No.1Thereplacementbreakersareidenticalreplacementsfororiginalequipmentexceptthatthetripratingsmatchthederatedampacitiesoftheconnectedcables.Thenon-safetyrelatedfunctionsoftheconnectedloadsystemsarenotmodifiedbythisaction.Installationofproperlysizedanddedicationtestedreplacementbreakerswillnotmodifythenon-safetyrelatedfunctionsofthesystemloads.ThechangeswillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-21.Thischangewillincreasetheprobabilityofsystemsremainingfunctionalintheeventofsustainedlimitedmagnitudefaultabovethecableampacitybyopeningtheaffectedcircuit.$ER~.:91-071RRDERl:88-3045A/B,Rev.0KAEReplacecoolingcoilswhicharelocatedintheRCICpumproomcoolersasasolutiontothecorrosiondamageinthecoolingcoils.R:I.No.II.No.III.No.Thereplacementcoolingcoilsdonotalterthefunctionandperformanceoftheoriginalcoolingcoils.NoneofthedesignbasisaccidentsdiscussedinFSARSection15areaffected.Failuremodesassociatedwiththereplacementcoilsarethesameastheoriginalcoilsanddonotbecomeaninitiatingeventforanydesignbasisaccident.FSAR9.2.5.1and9.4.2.2.'1discussthedesignbasisforRCICpumproomcoolers.ReplacementofthecoilswillneitheralterthefunctionnortheperformanceoftheRCICpumproomcoolersandtheymeetthedesignbasisdiscussedintheseFSARsections.TechSpecSection3/4.7.3,relatingtoRCICpumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.

$ERPgl.:91-073RE:DCP89-3021C,Rev.2FHE'odificationoftheheattraceforthecontainmentatmospherecontrolisolationvalvestoassurethevalveenvironmentalqualificationwillnotbeinvalidatedbyheattracemiscalibrationorfailureandtoassurethatcrediblefailure(s)ofthenonqualifiedheattracesystemdoesnothavethepotentialtoaffectredundantisolationvalves.Sample,linesfortheH2/02analyzersandcontainmentradiationmonitoringpanelsaiealsoheattraced.I.No.TheproposedactionassuresthattheheatappliedtotheH2/02AnalyzerandCRMPanelPipingsensinglinesandvalvesmaintainsthesametemperatureabovethedewpointanddoes.notexceedtheenvironmentallyqualifiedtemperatureoftheTargetRocksolenoidcontainmentisolationvalves.Thispermitstheanalyzers,panelsandisolationvalvestoperformtheirintendedsafetyfunctions.H.No.TheproposedactiondoesnotalterthefunctionoftheheattraceontheH2/02AnalyzerandCRMsamplinglines.Temperaturesonthepipingwillcontinuetobemaintainedabovethedewpointofthesampledairduringnormaloperationwithreducedheattracecyclingandthermalstresstothepipingandvalves.III.No.TheReactorCoolantLeakageDetectionSystemidentifiedinSection3/4.4.3oftheTechnicalSpeci6cationisrequiredtomonitoranddetectleakagefromthereactorcoolantpressureboundary.Theproposedactiondoesnotaffectthedetectionsystem'sabilitytoperformitsfunction.TheoperabilityoftheprimarycontainmentisolationvalvesidentifiedinSection3/4.6.3oftheTechnicalSpecificationensuresthatthecontainmentatmospherewillbeisolatedfromtheoutsideenvironmentintheeventofareleaseofradioactivematerialtothecontainmentatmosphereorpressurizationofthecontainment.Theproposedactionassuresoperabilityofthevalvestomeettheirisolationfunctionbymaintainingthevalvetemperaturesbelowtheirenvironmentallyqualifiedlimit.

~ER~.:91474RRE:DCP88-3018S,Rev.1Installationofvalves,piping,andanewrefrigerantreceivertanktoeliminaterefrigerantleaksandmaintenanceproblemsintheUnit2directexpansion(DX)refrigerantsystem.I.No.II.No.III.No.FSARChapter15"AccidentAnalysis"doesnotspecificallydiscussanyaccidentrelatedtotheDXSystem.FSARSection9.4(FSARTable9.4-5)presentsaFailureModeandEffectAnalysisfortheRBHVACsystem'andprovidesafunctionaldescriptionoftheESWGRRoomCoolingSystem.ThismodificationdoesnotaffectthefailuremodeandeffectanalysisasitrelatestotheESWGRRoomCoolingsystem.Theadditionofupgradedmaterialsandflexiblemetallic'hosesisintendedtoeliminaterefrigerantleaksandimproveoverallsystemreliability.Theemergencycoolingfunctionwillnotbechangedinanywaybythismodification.Noadditionalfailuremodes,asdescribedinFSARTable9.4-5,needtobeanalyzedforthissystemasaresultofthismodification.TherearenoformalTechnicalSpecificationsrelatedtotheESWGRRoomCoolingSystem.TheSSESTEAMManualidentifiesanadministrativeTechSpecforthissystem,buttheproposedactiondoesnotreducethemarginofsafetyassociatedwiththebasisforthisrequirement.Thismodificationdoesnotaltertheemergencycoolingfunctionofthissysteminanyway,andisintendedtoimproveoverallsystemreliabilityandequipmentaccessibility.$~~.:91-075:ProcedureES-161(261)401DERIFHAE:Todescribetheproceduralstepsnecessarytoutilizereactorwatercleanup(RWCU)asanalternatemodeofdecayheatremovalwhenotherheatremovalsystemsareunavailable.II.No.KMbLARY:I.No.TheblowdownmodeofRWCUisusedasamitigatingactionduringanalreadyexistingaccidentcondition,andbecauseoftheRWCUequipmentwillbeoperatedwithinitsdesignlimits(pressure,temperature,andflow),thereisnoincreased,probabilityofaccidentoccurrence.RWCUisusedaftertheaccidentoccurs.UseofRWCUrequirestwobypassestobeperformed.ThefirstistobypasstheRWCUNon-RegenHeatExchangerHighOutputTemperaturelogicdescribedinFSAR7.7.1.8.3.2.ThesecondisthebypassoflogicwhichclosesthevalveinRBCCWpipingwhichsuppliesRWCUNon-Regen.HeatExchangerdescribedinFSAR9.2.2.2.Theintentofbothoftheselogicsissatisfied.III.No.TheactiondoesnotinvolveanyTechSpecmarginofsafety.

TP-104-010Replacementoftheunqualifiedrelaysocketwithaqualifiedrelaysocketforthe.K11BX3relayandassociatedtestprocedure.I.No.Thischangeonlyreplacesunqualifiedsocketswithqualifiedsockets.However,theperformanceofthisworkdisablestheUnit1,Division1BOPLOCAloadshedlogicscheme.Thisdisablingdoesnotaffecttheoperationofthe13.8Kvloads,itsimplydisablestheautomaticloadsheddingfeatureassociatedwithnon-1EequipmentafteraLOCA.II.No.IH.No.Therefore,theactionofdisablingtheBOPLOCALoadShedSchemefortheUnit1B8c1DBuses,forapproximately4hours,duringtheperformanceoftheK11BX3relaysocketreplacementisconsideredbothsafeandprudent.TheBOPLOCALoadSheddingSchemeisnotspecificallydescribedintheFSAR.SurveillancerequirementsassociatedwiththeoperabilityoftheK11BX3relayaresatisfiedasdefinedinUnit1TechSpec4.3.3.2,FunctionSC.$g~.:91-077RREFERE:TP-104-009ERIReplacementoftheunqualifiedrelaysocketwithaqualifiedrelaysocketfortheK11AX3relayandassociatedtestprocedure.I.No.Thischangeonlyreplacesunqualifiedsocketswithqualifiedsockets.However,theperformanceofthisworkdisablestheUnit1,DivisionIBOPLOCAloadshedlogicscheme.Thisdisablingdoesnotaffecttheoperationofthe13.8Kvloads,itsimplydisablestheautomaticloadsheddingfeatureassociatedwithnon-1EequipmentafteraLOCA.II.No.III.No.Therefore,theactionofdisablingtheBOPLOCALoadShedSchemefortheUnit1Aand1CBuses,forapproximately4hours,duringtheperformanceoftheKl1AX3relaysocketreplacementisconsideredbothsafeandprudent.TheBOPLOCASheddingSchemeisnotspecificallydescribedintheFSAR.SurveillancerequirementsassociatedwiththeoperabilityoftheKl1AX3relayaresatisfiedasdefinedinUnit1TechSpec4.3.3.2,FunctionSC.

ging.~.:91-078DCP88-3018T,Rev.1Modificationstothedirectexpansion(DX)refrigerationsystemtorepairrefrigerantleaksandimprovemaintainability.I.No.II.No.III.No.FSARChapter15"AccidentAnalysis"doesnotspecificallydiscussanyaccidentrelatedtotheDXSystem.FSARSection9.4(FSARTable9.4-5)presentsaFailureModeandEffectAnalysisforthe-RB=HVAC.-systemandprovidesafunctionaldescriptionoftheESWGRROOMCoolingSy'tem'.ThismodificationdoesnotaffectthefailuremodeandeffectanalysisasitrelatestotheESWGRRoomCoolingSystem.Theemergencycoolingfunctionwillnotbechangedinanywaybythismodification.Noadditionalfailuremodes,asdescribedinFSARTable9.4-5,needtobeanalyzedforthissystemasaresultofthismodification.TherearenoformalTechnicalSpecificationsrelatedto-theESWGRRoomCoolingSystem.TheSSESTEAMManualidentifiesanadministrativeTechSpecforthissystem,buttheproposedactiondoesnotreducethemarginofsafetyassociatedwiththebasisforthisrequirement.fgR~Nl.:91-079TP-234436,R.1Toallowtie-inofatemporaryoutagechillertotheReactorBuildingChilledWatersystemduringaUnit2outage.R:I.No.II.No.III.No.SeeI.andII.above.Installationofthistemporarysystemwillnotimpactoperationofprimarycontainmentisolation,theonlysafetyfunctionofRBCWsystem.Normaloperationofthereactorbuildingventilationsystemwillnotbeimpactedbyinstallationofthetemporarychiller.Additionally,thisequipmentwillbeinstalledduringaperiodwhensecondarycontainmentisnoirequired.Theinstallationofthistemporarysystemdoesnotadverselyimpacttheoperationorsafetyfunctionofanyexistinginstalledequipment.

DCP90-9101,Rev.0ReplacetheonehourratedKaowoolfirewrapwithonehourratedTSIThermo-LagfirewrapontheUnit1safetyrelated4.16Kvbusconnectedtothedieselgeneratorstomeetampacityrequirements.I.No.'incethederatedcableampacityofthecablesisgreaterthantheampacityrequiredformitigatingadesignbasisaccident,theinstallationoftheTSIThermo-lagfirewrapdoesnotreducethereliabilityofthecablestoperformtheirsafetyfunction.II.No.TheactiontoreplacetheKaowoolfirewrapwithTSIThermo-Lagfirewrapon'conduitsC1FO33andCIF034doesnotinterferewiththelogic,controloroperationofanyplantsystemsorcomponents.Thereisnoimpactontheperiodicmaintenance,calibrationorsurveillanceactivitiesofanyplantsystemsorcomponents.III.No.~~TheactionpermitstherequiredsurveillancetestingperSection3/4.8.1tobeperformedwithoutthepotentialfuturedegradationofthecables.Thisactionassuresthepresentmarginofsafetyisnotreduced.ThefireratingoftheTSIThermo-LagfirewrapisequivalenttotheKaowoolfirewrapsothatthemarginofsafetyrequiredbyTechnicalSpecification3/4.7.7,FireRatedAssemblies,isnotaffected.

'I91-012HottapsintoReactorBuildingClosedCoolingWater(RBCCW)andTurbineBuildingClosedCoolingWater(TBCCW)aspartoftheInLineProcessInstrumentationUpgradeProject.I.No.ThereviewofFSARSection9.2.3indicatesthattheTBCCWsystemperformsnofunctionthatisimportanttosafety.ThereviewofFSARSection9.2.2indicatesthattheRBCCWsystemcontainmentpenetrationsandisolationvalvesperformcontainmentisolationfunctionswhichareimportanttosafety.Thetapsarelocatedonthesideorbottomofthepipestoreducethechanceofchipsfallingintotheprocesspips.Additionally,theRBCCWandTBCCWheadtanksassurepositivesystempressuretoflushcuttingchipsoutofthesystemandintothehottapapparatus.II.No.InaccordancewithFSARSections9.2.2and9.3.2,theRBCCWandTBCCWlinesarenotrequiredtofunctionafteranaccident.Aspreviouslydiscussed,theTBCCWandRBCCWsystemswillbeprotectedduringthehottappingproceduretominimizetheintroductionofsystemcrudorcuttingchipsintotheprocessplplllg.III.No.TechnicalSpecificationSections3/4.6.1and3/4.6.3containrequirementsfortheRBCCWPrimaryContainmentIsolationValveleakageintegrityandoperability.TheRBCCWhottapswhicharebeingperformeddonotmakeanydirectchangestothesevalves.TheTechnicalSpecificationsdonotaddresstheTBCCWsystemsinceithasnofunctionwhichisimportanttosafety.

0

$ER~.:91482DCP90-3055C,Rev.0ReplaceexistingcontrolswitchHS-28723B,GETypeCR2940UB203B,locatedinNon-Class1EPanel2C279withcontrolswitchtypeCR2940UB203aspartoftheChillerUpgradeProject.I.No.Thereplacementcontrolswitchisspecifiedtothesamecriteriaastheexistingcontrolswitch.However,thenewcontrolswitchhasaCamoperator03withcontactarrangementswhichallowthecircuittoremainenergizedwhentheswitchpositionischangedfrom"auto"to"start".Theswitchinglogicwillbeimproved,eliminatingunnecessarytripofpumps2P235Band2P217BwhencontrolswitchHS-28723Bisplacedfrom"auto"to"start"position.II.No.ThismodificationaddsnonewfunctiontotheReactorBuildingChilledWaterSystemasdescribedinFSARSections9.2.2and9.2.12.3.III.No.TheoperationoftheReactorBuildingChilledWaterSystemhasnosafetyrelatedfunction.Althoughisolatedportionsofchilledwaterpipingofthecontainmentaresafetyrelated,theseportionsarenotaffectedbythismodification.

$ERPgk.:91-083ggDD333-3D33,3.DReplacementofUnit1ReactorBuildingSampleStation(RBBS)(1C210)andTurbineBuildingSampleStation(TBSS)(1C132).I.No.II.No.III.No.~~TheFSARsections9.3.2.3,9.2.2.1,9.4.4.1,9.3.1.1;1and9.2.9.1containthefunctionsandrequirementsoftheinterfacingandProcessSamplingSystems.Theystatethatthesystemshavenosafety-relatedfunctions.Thesesectionswerereviewedanditwasdeterminedthatthischangedoesnotchangethefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.Malfunctionofthesamplestationsormodulatingdamperisnotamalfunctionofadifferenttypethanpreviouslyevaluatedbecauseitdoesnothaveanadverseaffectonthesafetyfunctionofthereactorbuildingrecirculationmode.BasedonthereviewofFSARSection9.4.4theTurbineBuildingHVACsystemisanon-safetyrelatedsystemwhichisnotrequiredtooperatetomitigatetheconsequencesofanaccident.ThismodificationdoesnotreducethemarginofsafetysincetheinterfacesbeinginstalledfortheTBSSandRBSSarenotsafety-relatedanddonotaffectanymarginsofsafetydescribedintheTechnicalSpecifications.TheacceptancelimitsfortheRCSchemistryasnotedintheTechnicalSpecificationSection3/4.4.4willnotbeaffectedasaresultofmodificationperformedbythischange.

Ega,MQ.:91484DCP90-3029,Rev.1TheexistingUnit2ReactorBuildingSampleStation(RBSS)(2C210)andTurbineBuildingSampleStation(TBSS)(2C132)arebeingentirelyreplacedandalsorelocatedsothattheirinstallationmaybecompletednon-outage.I.No.ThemodificationreplacesprocesssamplelinesandaddscoolingwaterpipingfromtheRBCCWsystem.InaccordancewithFSARSections9.2.2.3and'.3.2.3thesamplelinesandRBCCWlinesare-notrequiredtofunctionafteranaccident,andtheinstallationdoesnotimpactthesafetyisolationfunctionofcontainmentisolationvalvesHV21314,HV21346,HV21313,andHV21345.II.No.Thesamplelinesareusedonlyforchemistrymonitoringandprovidenodirectcontrolfunctions.Lossofsamplelineflow,duetoblockageorbreakage,resultsinlossofchemistrymonitoringuntilcorrectedbutdoesnotcreateanypossibilityforunevaluatedaccidentsormalfunctions.BreakageoflinesofthissizeisaddressedinFSARSection15.3.2andtheresultsfoundacceptable.TheTechnicalSpecificationswerereviewedtodetermineifanymarginsofsafetyorlimitingconditionsforoperationaredefinedfortheProcessSamplingandtheRBCCWSystems.NoTechnicalSpecificationrequirements,includingsafetymargins,areestablishedfortheProcessSamplingsystem.TechnicalSpecificationSections3/4-6.1and3/4-6.3containrequirementsfortheRBCCWPrimarycontainmentIsolationValveleakageintegrityandoperability.Thischangedoesnotmakeanydirectchangestothesevalves.

Egg~;91-085RE-2TY-008,Rev.1Thisprocedureisusedtoinvestigateandrepairthepersistentleakthroughcontrolcell38-31.LNo.PSARSections15.0"AccidentAnalysis",6.5.3.2"SecoiidaryContainment",and9.4.2"ReactorBuildingVentilation"werereviewed.ZoneIandZoneIIISecondaryContainmentwillnotbeimpactedbythisprocedureandthereforewillfunctionasdesigned.NoneoftheabovereferencedsectionsdiscussaccidentsrequiringSecondaryContainmentonaunitthathasbeendefueledwiththefuelpoolgatesinstalled.II.No.SeeI.above.Also,therearenoaccidentscenariosthatcouldbepostulatedwhenthereactor.vesselisdefueledandthefuelpoolgatesareinstalled.Theworstcasescenariocouldbeanunisolableleakthroughthebottomofthevessel.ZoneIIISecondaryContainmentwouldbeoperabletoisolatetheRefuelingFloorshouldanairbornesituationoccur.III.No.~~TechnicalSpecificationSection3.6.5.1"SecondaryContainmentIntegrity"willnotbeaffectedforUnitIandisnotapplicableforUnit2.TechSpecSections3.9.10.1and3.9.10.2addresstherequirementsforCRDremoval.SincetheRPVisvoidoffuelbundles,thepossibilityofaninadvertentcriticalityisremoved,thereforethemarginofsafetyasdefinedinthebasisisnotreduced.

SEKZQ-'1486:ProcedureOP-257405,Rev.1Thisprocedureaddressesprerequisites,precautions,andbothoperationalandsafetyimpactsfortakingUPSpanel2Y629outofservicewhilecleaningcabinets3and4ofthevitalUPS2D666.I.No.,H.No.IH.No..Theonly,accidentidentifiedinChapter15thatwouldbeapplicablein-thisconditionisafuelmoveaccident.AprerequisiteexistsinGP-257-065thatnofuelmovementis*allowed.Theloadspowered'duringthis'rocedurearenotrequiredforthesafeshutdownoftheplant,effectthecontainmentbarriersorcapabilitiesofheatremovalsystems.ThisprocedureOP-257-005,hasbeenperformedinthepast.Therevisiononeenhancements(temporarypowertoanumberofcircuitsandjumperingoftherefuelingbridgemotioninterlocks)arebeingimplementedsincealongtermlossofvitalUPSwouldhaveanegativeeffectonoutageactivities.TheindividualloadshavebeenreviewedandtheproposedactionsdonotcreateapossibilityofanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR.Panel2Y629isanon-class1EloadpanelandisnotrequiredordiscussedinthebasisforTechnicalSpecification3/4.8.3,onsitepowerdistributionsystems.SELM-'1487:DCP90-9079,Rev.0ReinstatetheFeedwaterHeaterHighLevelAlarmwhichwasdisconnectedbyabypass.I.No.II.No.III.No.FSARSec.10.4.10.1states"The...FeedwaterHeaterDrainandVentSystemhasnosafetyrelatedfunction."TheaccidentanalysisofFSARChapter15isnotaffectedbythismodification.Thereconnectionofalocalalarmfunctiondoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafetyaspreviouslyevaluatedinthe.FSAR.ThechangeenhancestheFeedwaterHeaterlevelcontrolsbyprovidingtheoperatoranalarmonrisingwaterlevel.ThischangeaddsnonewfunctiontotheFeedwaterHeaterVents&Drainsnordoesitremoveanyfunctionofthesystem.TechnicalSpecificationdoesnotaddressFeedwaterHeaterwaterlevel.Thismodificationonlyreinstatesalocalalarmfunction.

SggjK.:91-088:DCP86-7026,Rev.4ReplaceStatic0-ring(SOR)pressureswitchusedinRHR"B"loopwithaBartonModel288Awithalowersetablerange.TheBartonModel288Ainthe"A"loopwillbeplacedwithanotherModel288A,withalowerrangetomatchthe"B"loop.I.No.RHRsystemisdiscus!uziinFSAR7.1.2a1.25,7.1.la.2,7.4.1,7.4.1.3,and7.6.1.a.3.TheswitchesarenotspecificallyaddressedinanyChapter6or15safetyanalysis.ThevalvesarecontainmentisolationvalvesandareassumedtocloseorbeclosedduringaLOCA.Thisfunctionisnotaffectedbythereplacementofthepressureswitches.Replacementoftheexistingpressureswitchesdoesnotchangethesystemdesignintent.ThefunctionoftheswitchesremainsthesameinthatthesafetyisolationsetpointwillbesettoclosethevalvesatavaluelessthanorequaltothatlistedintheTechnicalSpecifications.Thefailuremodesofthereplacementswitchesarenodifferentthanthatoftheexistingswitches.Afailureresultinginswitchactuation,whenpressureislow,willcausealossofShutdownCooling.LossofShutdownCoolingisananalyzedeventinChapter15oftheFSAR(Event18).III.No.ThereplacementoftheexistingBartonandSORswitchesdoesnotaffectTechnicalSpecificationsBases3/4.3.2:IsolationActuationInstrumentationor3/4.4.9:"ResidualHeatRemoval".TheswitchesareaddressedinTechnicalSpecificationTable3.3-2-1:"IsolationActuationInstrumentation",whichstatesthattheswitchesmustbeoperationalinConditions1,2and3orelsethesystemisolationvalvesmustbedeclaredinoperable.ThismodificationwillenhancetheoperationofthevalvesandRHRsystem.

/~Rgb.:91-089RRE:SCPJ91-1013,Rev.0RaisetheMSIVlowpressuresetpointsforpressureswitchesPSL-B21-2N015A,B,CandDfromtheirpresentvaluesbacktotheiroriginalvalues.~AR:II.No.Because-aprevious:circuit.modificationeliminatedspuriousactuationswithoutchangingsystemperformance,restoringthesetpoints'totheiroriginalvaluedoesnotincieasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafety,aspreviouslyevaluatedintheSAR.H.No.Thesetpointsweresetabnormallylowtoeliminatespuriousfalseisolations.ThesetpointswereloweredwithoutaffectingTechnicalSpecificationsetpoints.Becausethereasonforloweringthesetpointshasbeeneliminatedwithoutaffectingsystemperformance,restoringtheoriginalsetpointsdoesnotcreateapossibilityforanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheSAR.III.No.Thissetpointchangeraisesalowpressuresetpoint.Thismovesthesetpointaway~~~fromtheAllowableValuewhichincreases,notdecreases,theMarginofSafety.

DCP90-9083,90-9084,Rev.1RemovethesolidstateauxiliaryrelayanditsClasslE125VDCpowersupplyfromHPCIlubeoiltanklevelswitchesLSHL15660and25660."I.No.II.No.III.No.Thischangedoes.notaffecttheoperationoftheHPCIoranyrelatedequipmentordecreasethereliabilityof,thelevelalarm.Sinceonlynon-safetyrelatedHPCIfunctionsareaffected,nonewmodesof.operationorsystemfailuremodesarecre'ated.Additionally,'theClass1E125VDCsystemissimplifiedbytheeliminationofunnecessarynon-1Eloads.ReferringtoTechSpec3/4.3.3and3/4.5.1fortheHPCIsystemand3/4.8.2forthe125VDCsystem,thischangedoesnotnegativelyaffecttheinstrumentation,control,performanceoravailabilityoftheHPCIsystem,the125VDCsystem,oranyrelatedequipment.~8~.:91-091DCP90-3055D,Rev.0ReducethecollectionofservicewatersiltanddebrisintherootvalvesforthecondenserpumplowfiowswitchontheUnit2ReactorBuildingChillerServiceWaterSensinglinesbyreplacingtheexistingrootvalves(1"globevalves)withnewfullport1"ballvalves.$ggM4,RY:I.No.II.No.III.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewrootvalveswillaffectonlyaportionoftheSWSystemassociatedwiththechillercondenserwatercirculatingpump.ThemodificationwillnotaltertheintendedfunctionoftheRBCWSystemdescribedinFSARSections9.2.12.3.2.3and9.2.12.3.3.TheproposedactiondoesnotaffectoperabilityoftheRBCWsystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyinstallationofthenewrootvalves.TheRBCWSystemandtheSWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperatureduringreactoroperatingconditions1,2and3.Table3.6.3-1includesRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

~E~.:91-092RR:DCP90-3055F,Rev.0DEPTIEo1ExistingtemperaturemodulatingbutterflyvalvesontheUnit2ReactorBuildingChillerCondenserarereplacedwithnewcontrolvalveshavinghighturndownratioandincreisedanticavitationprotectiontoimprovechillerrecirculationloopflowcontrol.I.No.,AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewtemperaturecontrolvalvesandtheirtemperaturecontrollerwillaffectonlyaportionoftheSWSystemassociatedwiththechillercondenserwatercirculatingpump.H.No.TheproposedmodificationwillinstallnewtemperaturecontrolvalvesandtheirtemperaturecontrollerwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.TheexistingmethodoftheservicewatertemperaturecontrolbyrecirculationoftheservicewaterasdescribedinFSARSection9.2.1.2willbeunchanged.III.No.TheRBCWSystemandtheSWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

5'.:91-093'CP90-3083,Rev.0ThismodificationwillreplacetheexistingDieselGeneratorIAC66B4Asinglephaseinductiondiskovercurrentrelay,locatedinPNLsOCS19A,B,C&DwithaClasslE,singlephase,ASEABrownBoveri(ABB)typeITS-50Ddefinitetimeovercurrentrelay.I.No.II.No.IH.No.TheACPowerSystemsandDCPowerSystemsdesignbasisandfunction,aspreviouslyevaluatedinsections8.3.1and8.3.2respectivelyoftheFSAR,isnotalteredbythismodification..ThismodificationreplacestheexistingelectromechanicalIAC66relaywithasolidstatedefinitetimeovercurrentrelay.Thismodificationdoesnotmodifythefunctionorthedesignphilosophyoftheexistingannunciationsystem.Thereplacementrelaywillallowmoreaccuratepick-upsetting,thereforereliabilityandoperationoftheannunciationwillbeimproved.Thismodificationdoesnotaffecttheinstrumentation,control,performanceoravailabilityofDieselGeneratorsA,B,C&D.The"NearFullLoad"alarmisnotdiscussedanddoesnotaffectTechnicalSpecificationSection4.8.1.1.2whichprovidestheDieselGeneratorsoperabilitysurveillancerequirements.$gR~.:91-094FERE:SCPJ-91-1005,1006,1007&1008RJPTITheactionistoprovideengineeringreviewofswitchsetpointsfortheBackupWaterFireProtectionSystem(BWFPS)attheWellWaterPumpHouse.$g~ARY:I.No.II.No.III.No.~~TheBWFPSisnotdiscussedintheFSAR.TherearenodesignbasisaccidentswhichaddressoperationoftheBWFPS.ThedesignbasisaccidentscontainedinFSARChapter15werereviewed.TheactiondoesnotaffectthedesignoroperationoftheBWFPS.ThetaskaddsnonewfunctionstotheBWFPS.Nordoesitremoveanyexistingfunctionsofthesystem.Rather,itprovidesadocumentedbasisandcalculationfortheBWFPSsetpoints.ThereisnodiscussionoftheBWFPSinthebasisofanyTechnicalSpecification.

Egg~;91-095:DCP90-3026ExistingUnit1ReactorBuildingSampleStation(RBSS)(1C201)andTurbineBuildingSamplingStation(TBSS)(1C132)arebeingreplacedtoupdateinstrumentationanmonitoringsystems.I.No.FSARSection9.2.2.1,9.3.1.1.1,9.2.9.1,9.4.4.1and9.3.2:3werereviewed.Theystatethatallsystems,exceptReactorBuildingventilationandRBCCW,havenosafety-relatedfunctions.Thereferencesectionswerereviewedanditwasdeterminedthatthischangedoesnotchangethefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.ThereviewofFSARSections6.2.3.2.3.1,6.2.4.3.3.5and9.2.23indicatethattheRBCCWSystemcontainmentpenetrationsandisolation.valvesperformcontainmentisolationfunctionswhichareimportanttosafety.TheinstallationofnewpipingunderthisDCPdoesnotchangetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofthesecomponentsoverthatwhichwaspreviouslyevaluated.II.No.~~Malfunctionofthesamplestationsorthemodulatingdamperdoesnothaveanadverseaffectonthesafetyfunctionofthereactorbuildingrecirculationmode.BasedonthereviewofFSARSection9.4.4theTurbineBuildingHVACsystemisanon-safetyrelatedsystemwhichisnotrequiredtooperatetomitigatetheconsequencesofanaccident.TheadditionalelectricalloadaddedbythischangedoesnotexceedtheloadmarginprovidedinFSARtables8.3.1through8.3.5.III.No.ThismodificationdoesnotreducethemarginofsafetysincetheinterfacesbeinginstalledfortheTBSSandRBSSarenotsafety-relatedanddonotaffectanymarginsofsafetydescribedintheTechnicalSpecifications.

0 ggR~.:91-096:DCP90-9031A,Rev.0ThischangewilleliminatetheUnit1alarmTAHL-11653,CausticDButionWaterHeaterTemperatureHigh/Low,fortheCondensateDemineralizer.I.No.Thechangedeletesanalarmwhichmonitorsanequipmentthatisnolongerinservice.FSARSection10.4.6-CondensateCleanupSystemandFSARChapter15.0-AccidentAnalysiswerereviewedtodeterminetheimpactofthismodification.TheChapter15analysesdonotexplicitlyaddresstheCondensateCleanupSystem.FSARSection10.4.6.1statesthedesignbasesforthesystem.Noneofthedesignbaseswillbeaffectedbythismodification.II.No.Thischangedoesnotimpactthelogic,controloroperationofanyplantsystems.TheCondensateCleanupsystemperformancerequirementsaremetwiththedeletionofthesubjectalarm.III.No.~~TheUnitITechnicalSpecificationshavebeenreviewedforimpactofthe-proposedmodification,specificallySections3.0and4.0-LimitingConditionsforOperationandSurveillanceRequirementsandSectionB3/4-BasesforSections3.0and4.0.TheproposedmodiGcationdeletesanalarmwhichmonitorsequipmentthatisnolongerinservice.

~8R~N~!91-097NL-91-020,Rev.0DocumentsarebeingrevisedtoreflecttheorganizationalchangesassociatedwithtransferringtheShiftTechnicalAdvisorandReactorEngineeringGroupsfromtheTechnicalSectiontotheOperationsSection.I.No.FSARSection13.1.2.2.7describestheTechnicalOrganizationwiththePlantEngineeringSupervisor,ReactorEngineering(R.E.)Supervisor,LeadShiftTechnicalAdvisorandSeniorComplianceEngineerreportingdirectlytotheTechnicalSupervisor.AlthoughtheR.E.SupervisorandLeadSTAwillnowreporttotheOperationsSupervisor,theReactorEngineeringGroupandSTAGroupfunctions,asdescribedinthisFSARsectionwillnotbechanged.II.No.TheproposedchangesareonlyorganizationalinnatureandwillnotaffectthepossibilityforaccidentsandmalfunctionsofadifferenttypethanpreviouslyevaluatedintheFSAR.IH.No.~~TechnicalSpec.Section6.0,Administrativecontrols,requiresanSTAonshiftanddesignatestheReactorEngineeringSupervisorortheUnitReactorEngineerasamemberofthePORC.Theserequirementswillnotbeaffectedbythischange,andT.S.Section6.0doesnothaveaTechSpecBasesSectionwhichcouldbeaffected.TechSpec.Section6.2describestheorganizationalcharacteristicstheNRChasdeterminedtobeimportanttosafety(ref:GenericLetter88-06).TheproposedchangesdonotaffectTechSpecSection6.2.

Egg~.:91-098:Nl91-018,Rev.0TheproposedactionistouseacationresinintheReactorWaterCleanup(RWCU)precoatmaterialwithafunctionalgroupthatdoesnotdegradeintosulfateoranyotherionicspeciesknowntobedetrimentaltoBWRchemistry.I.No.Section15.7oftheFSARanalyzesRadioactiveReleasefromsubsystemsandcomponents.Sincetheamountofactivitywithinthesystemisnotexpectedtochange,thissectionisnotaffected.Thenewresinisexpectedtoimprovevesselchemistryandreducetheprobabilityofchemistryinducedfailuresofallequipmentincontactwithcoolant.II.No.Asstatedabove,thisactionisexpectedtoraisethepurityofthecoolant,byreducingbaselinesulfatelevelsslightly.Thisreductionofsulfateandconductivitylevelsandtherelationshipbetweenconductivity,sulfateandothervesselchemistryparametersonIGSCCarediscussedinSection5.2.3.2.2oftheFSAR,BWRChemistryofReactorCoolant.TheTechSpecbasesforrequiringconductivitymeasurementsistobeabletodetermineabnormalconditions.FromtheTechSpecBases3/4.4.4Chemistry-"Whentheconductivityiswithinlimits,"(KIumho/cm),"thepH,chlorides,andotherimpuritiesaffectingconductivitymustalsobewithinacceptablelimits."Thisaction,asstatedpreviously,isexpectedtoimprovevesselcoolantquality.91-099'L-91-019,Rev.0TodeterminetheacceptabilityofthreebladderassemblydesignsasinstalledintheaccumulatorsonthedischargelineofeachStandbyLiquidControl(SLC)pump.I.No.SLCsystemremainsfunctionallyidenticaltotheoriginalsystem.TheSLCsystemoperationisdiscussedintheFSARchapter9.3.5.3.Asaspecialsystem,SLCisnotrequiredto'performitsintendedfunctionduringdesignbasisevents"(i.e.LOCA,LOOP,etc);itishowever,requiredtobereliabletoadegreeconsistentwithitsroleasaspecialsafetysystem".Assuch,thepumpsarepoweredfromanemergencydieselgeneratorandthecomponentsofthesystemareseismicallyqualified.(Note:SLCelectricalcomponentsandpipinghavenotbeenaffectedbythechange.)II.No.TheSLCsystemisusedinthree-specialplantcapabilitydemonstrationeventscitedinAppendixAofChapter15.Specificallyevents51,52and53whichareextremelylowprobabilitynondesignbasispostulatedincidents.Theanalysesprovidedthereindemonstrateadditionalplantsafetyconsiderationfarbeyondreasonableandconservativeassumptions(FSARSection9.3.5.4).ThechangestotheaccumulatorchargingconnectionsdonotincorporateanynewdesignbaseoraltertheexistingoperationalschemeoftheSLCsystem.III.No.TechnicalSpecificationSections4.1.5-cand3/4.1.5requireeachSLCpumptodemonstrateaminimumflowof41.2GPMataminimumdischargepressureof1,190psig.Additionallydelineatedarerequirementsforinjectiontime,boronconcentrations,boronvolume,etc.ThechangestotheaccumulatorsdonotaffectanyoftheTechnicalSpecificationparameters.

$E~~.:91-100R~:BCPL-3a!4,903023&9MO37ThesechangesinstaHUnits18c2turbineandreactorbuildingsamplestationlocalacquisitionmodulesandthecentraldatahandlerandengineeringanalysisprocessor.I.No.iPerFSAR9.3.2.3theprocesssamplingsystem:isnotrequiredtofunctionduringanaccidentnorisitrequiredtoeitherpreventormitigatetheconsequencesofanaccident.Also,perFSAR7.7.1.7.1.2,theplantcomputersystemisnon-'safetyrelatedandthereforeisnotessentialforthesafetyoftheplant.II.No.Thesechangesinstallnon-safetyrelatedracewayandcablestomakethisequipmentoperational.Therearenofailuremodesofequipmentimportanttosafetythatcouldcausenewunanalyzedtypeofmalfunctionastheresultsofthesemodifications.Theonlyinterfacewithequipmentimportanttosafetyiswiththedieselgenerators.FailureofthedieselgeneratorscouldrenderportionsofthePlaterChemistryDataAcquisitionSysteminoperativebutcouldnotcauseanew~~unanalyzedtypeofplantmalfunction.III.No.TechnicalSpecificationsdonotgiveanyrequirementsfortheProcessSamplingSystemoranyofthesystemsinterfacingwiththem.

0

DCP90-3070,Rev.1DERlPTIHEAddcomponentsthatprovideauxiliarycontroltothedampercircuitoftheControlStructureHVAC(CSHVAC).~igARY:I.No.Thismodificationisbeingperformedtoensurecompliancewith10CFR50,AppendixR.AsstatedinFSAR9A.1.3,equipmentsuchasfansanddampersareredundant.Inthischangethecomponentsaddedareredundant,thatistheyareinstalledineachoftheredundantfan/damperscircuits.AsanalyzedinTables9.4-16,17,18,and20thefailureofanyfanordamperwillhavenoeffectonthesystembecausethestandbyfanwillautomaticallystart,thesamestatementholdstrueforthetransformers/relaysaddedbythischange.II.No.ThismodificationdoesnotcreateanyadditionalscenarioswhichcouldpreventtheCSHVACsystemfromfulfillingitsdesignrequirements,eitherfromnormaloremergencyoperation.TheadditionofauxiliarydampercontrollogicmaintainstheredundantHVACsystemsasdescribedinFSARSections9.4.1.3.ThedesignofthemodificationconformstothedesignevaluationoftheControlStructureHVACasstatedinFSARSection6.4.4.III.No.TheControlRoomEmergencyOutsideAirSupplySystem(CREOASS)(3/4.7.2)isaddressedbytheTechnicalSpecificationsforUnit1andUnit2.ThismodificationdoesnotaffecttheCREOASSsystemasdescribedinFSAR9.4.1.2.4.

RRERE:DCP90-3084M,Rev.0Replacetheexisting250VDCfusesinthebatterychargers,loadcentersandmotorcontrolcenterswithintheUnit1250VDCsystem.I.No.H.No.III.No.Thereplacementfusesandfuseblocksarespecifiedtothesamecriteriaastheexistingfusesandfuseblockswiththeexceptionthattheyarequalifiedtoaminimumof300VDCand20,000ampsinterruptingcapacityinordertoassureinterruptionoffaultedcircuitsandpreventfurtherpropagationofthefailures.ThefailuremodeandeffectanalysisprovidedinFSARTable8.3-22forthe250VDCSystemisnotimpactedbythischange.Installationofproperlyratedandsizedfusesandfuseblockswillnotmodifythesafetyfunctionsofthesystemloads.TheproposedmodificationwillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-22.TheproposedactiondoesnotaffectanyTechnicalSpecification/Bases.Theproposedactiondoesnotmodifythefunctionorcapabilityofanyconnectedsafetysystemsandwillincreasetheprobabilityofsafetysystemsremainingfunctionalintheeventofafaultbyisolatingtheaffectedcircuit.~ERj~.:91-103:DCP90-3085M,Rev.0DERIPTIFHE:Replacetheexisting250VDCfusesinthebatterychargers,loadcentersandmotorcontrolcenterswithintheUnit2250VDCsystem.fARY:I.No.II.No.III.No.~~Thereplacementfusesandfuseblocksarespecifiedtothesamecriteriaastheexistingfusesandfuseblockswiththeexceptionthattheyarequalifiedtoaminimumof300VDCand20,000ampsinterruptingcapacityinordertoassureinterruptionoffaultedcircuitsandpreventfurtherpropagationof,thefailures.ThefailuremodeandeffectanalysisprovidedinFSARTable8.3-22forthe250VDCSystemisnotimpactedbythischange.Installationofproperlyratedandsizedfusesandfuseblockswillnotmodifythesafetyfunctionsofthesystemloads.TheproposedmodificationwillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-22.TheproposedactiondoesnotaffectanyTechnicalSpecification/Bases.Theproposedactiondoesnotmodifythefunctionorcapabilityofanyconnectedsafetysystemsandwillincreasetheprobabilityofsafetysystemsremainingfunctionalintheeventofafaultbyisolatingtheaffectedcircuit.

DCP90-3088,Rev.0ProvideoverpressureprotectionfortheEmergencyServiceWater(ESW)systembytheinstallationofa1-inchsafetyreliefvalve.I.No.ThesafetyreliefvalveisdesignedandconstructedtomeettherequirementsofASMESectionIII,Class3.Thiscodeclassificationisapplicabletovalves,pipingandothercomponentsintheESWsystemasspecifiedintheFSARTable3.2-1,andensurestheintegrityofthesystem'spressureretainingboundary.II.No.Becausethevalveislocatedonashortlengthofpiping,incloseproximitytotheexistingESWpiping,afailureofthenewvalveorinletpipingtothevalvedoesnotcreateagreaterpotentialforequipmentdamageduetowatersprayorfloodingthanpreviouslyconsideredinFSARSections3.6.1and3.4,respectively.III.No.ThemarginofsafetyestablishedinTechnicalSpecificationsectionsB3/4.7.1andB3/4.8.1isbasedonaminimumlevelofoperabilityoftheDieselGeneratorandEmergencyServiceWatersystemswhichconsidersthatasinglefailureofoneofthealigneddieselsorthelossofoneflowpathoronepumpdoesnotpreventthesystemsfromperformingtheirsafetyfunctions.ThepotentialfailuremodesofthesafetyreliefvalveandtheresultingwaterlossesdoesnotpreventsufficientcoolingwaterfrombeingsuppliedtooneESWloop.

RR:DCP90-9032B,Rev.0DeletionofCondensateDemineralizernuisancealarms:LAL-21631,AcidStorageTankLowLevel,LAL-21677,CausticStorageTankLowLevel,andTAHL-21653,CausticDilutionWaterHeaterTemperatureHigh/Low.$QgM4.RY:I.No.FSARSection10.4.6-CondensateCleanupSystemandFSARChapter15.0-AccidentAnalysiswerereviewedtodeterminetheimpactofthismodification.TheChapter15analysesdonotexplicitlyaddresstheCondensateCleanupSystemortakecreditfortheCondensateCleanupSysteminthemitigationofaDesignBasisAccident(DBA).FSARSection10.4.6.1statesthedesignbasesforthesystem.Noneofthedesignbaseswillbeaffectedbythismodification.II.No.Thischangedoesnotimpactthelogic,controloroperationofanyplantsystemsthatperformasafetyfunction.FSARSection10.4.6-CondensateCleanupSystemandChapter15-AccidentAnalysiswerereviewedfortheimpactoftheproposedchange.TheCondensateCleanupSystemperformancerequirementsaremetwiththedeletionofthesubjectalarms.Thealarmsmonitorequipmentwhichisnolongerinservice.III.No.TechnicalSpecificationshavebeenreviewedforimpactoftheproposedmodification,specificallySections3.0and4.0-LimitingConditionsforOperationandSurveillanceRequirementsandSectionB3/4-BasesforSections3.0and4.0.TheproposedmodificationwillnotaffecttheoperationofanysystemasdescribedintheTechnicalSpecifications.

$ER~.:91-106RE:DCP90-9032D,Rev.0ThechangewilleliminateCirculatingWaternuisancealarms:AAH-23233,Unit2CirculatingWaterph-High,AALL-23233,Unit2CirculatingWaterph-Low,AALI23233,Unit2CirculatingWaterph-Low-Low,andCAHL-23236,Unit2CirculatingWaterConductivity.SUMhBILY:I.No.FSARSection10.4.5-CirculatingWaterSystemandFSARChapter15.0-AccidentAnalysiswerereviewedtodeterminetheimpactofthismodification.TheChapter15analysesdonotexplicitlyaddresstheCirculatingWaterSystemortakecreditfortheCirculatingWaterSysteminthemitigationofaDesignBasisAccident(DBA).FSARSection10.4.5.1statesthedesignbasesforthesystem.Noneofthedesignbaseswillbeaffectedbythismodification.II.No.FSARSection10.4.5-CirculatingWaterSystemwasreviewedfortheimpactoftheproposedchange.TheCirculatingWaterSystemperformancerequirementsaremetwiththedeletionofthesubjectalarms.Theproposedmodificationwillnotimpacttheoperationofanyplantsystemsthatperformasafetyfunction.TheUnit2TechnicalSpecificationshavebeenreviewedforimpactoftheproposedmodification,specificallySections3.0and4.0-LimitingConditionsforOperationandSurveillanceRequirementsandSectionB3/4-BasesforSections3.0and4.0.TheproposedmodificationwillnotaffecttheoperationofanysystemasdescribedintheTechnicalSpecifications.

~ER~N.:91-107g:NL-91-021,Rev.0ReplacementofanexistingresistorandcapacitorontheRodSequenceControlSystem(RSCS)Test2Bcardwitharesistor,capacitoranddiodetoincreasereliabilityofthecircuittorestrictcontrolrodinsertiontoonenotchatatime.I.No.TheFSAR,includingSections15.4.1,RodWithdrawalError-LowPowerand15.14.2,RodWithdrawalError-AtPower,hasbeenreviewed.Otherthanoperatorerrors,theabovesectionsdealwithcontinuousrodwithdrawalandmovementofcontrolrodsbeyondbankinglimits.TheRSCSsignalswhichpreventcontinuousrodwithdrawalsunderspecifiedconditionsandwhichenforcebankinglimitsaregeneratedincircuitryindependentofthegenerationoftheoperatorinsertrequestedsignals.II.No.Changingtheinsertcircuitasdescribedabovewillhavenoeffectonthepossibilityofamultiplenotchwithdrawal.Therefore,theproposedcircuitchangedoesnotcreateapossibilityforanaccidentormalfunctionthathasnotbeenpreviouslyanalyzed.III.No.Basis4.1.4,ControlRodProgramControls,whichdealswithcontinuousrodwithdrawalandrodpatternswhichminimizetheconsequencesofaroddropaccident,hasbeenexamined.ThechangeasanalyzeddoesnotaffecttheTechnicalSpecificationbases.

E:DCP90-3049DRIPTIHE:InstallationofahighlyaccurateultrasonicflowmonitoringsystemforbothoftheUnit2,96-inchpipessupplyingcirculatingwatertothecondenser.R:I.No.H.No.III.No.AsdiscussedinFSAR10.4.5,theCirculationWaterSystemhasnosafetyrelatedfunction.Section15.2.5oftheFSARanalysisalossofcondenservacuumwherebythereisalossofoneormoreoftheCirculatingWaterPumps.Thischangewillnotincreasetheprobabilityofalossofcondenservacuum.Section10.4.1.3.2oftheFSARanalysiscondenserleakage.Ananalysiswasconductedtoevaluatetheeffectsoffailureofthemountingplatesoncondenserleahge.Thelossofthestainlesssteelpipes,transducers,and/orpullboxeswillnotincreasetheprobabilityofanaccident.Thismodificationaffectsthecirculatingwatersystemwhichhasnosafety-relatedfunction.Inparticular,flowmeasurementofcirculatingwaterhasnodirectinterfacewithanysafetyfunctionintheplant.SEEM.:91-109DCP88-3047A/3DERIPTIFHAME:ReplacementofcorrodedcoolingcoilswhicharelocatedintheUnit1HPCIpumproomcoolers.MARY:I.No.II.No.III.No.FSARSection9.4.2.2,9.2.5andTable9.4-1,9.4-4,9.2-2and9.2-3providedetailsofRCICpumproomcooling.Thesesectionsandtableswerereviewedforapplicability.TheproposedmodificationstoreplacetheexistingcoilsneitheralterthefunctionnortheperformanceoftheHPCIpumproomunitcoolers.FSARSection9,2.5.1and9.4.2.2.1discussthedesignbasisforHPCIpumproomunitcoolers.ReplacementofthecoilswillneitheralterthefunctionnortheperformanceoftheHPCIpumproomcoolersandtheymeetthedesignbasisdiscussedintheseFSARsections.Thesemodificationswillenhancethereliabilityoftheunitcoolers.AlthoughSSESTechnicalSpecificationdoesnotincludespecificrequirementsforHPCIpumproomcoolers,theyarerequiredasattendantcoolingfortheHPCIpumps.Therefore,TechnicalSpecificationSections3/4.3.3and3/4.5.1relatingtoHPCIpumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.

SCPE911021EstablishtherelayalarmsetpointsforexistingUnit1Class1E24VDCbatterychargerfailurealarmrelaysandbatterymonitors.SVMMkkR':I.No.II.No.III.No.The24VDCSystemprovidesareliableandcontinuoussourceofuninterruptedDCpowertotheprocessradiationmonitors,thesourcerangemonitors,andtheintermediaterangemonitors.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.TheeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluatedaspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe24VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E24VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClass1E24VDCSystem.Therefore,margininthe24VDCSystemisnotaffectedbythissetpointchangepackage.~ER~N.:91-111RREFEE:SCPE911022DERIPTIFHANE:EstablishthesetpointsforexistingUnit1Class1E125VDCbatterychargerfailurealarmrelays,batterymonitors,andgrounddetectionalarmrelays.SQMh/ARY.'.No,II.No.III.No.The125VDCSystemprovidesreliableandcontinuouscontrolandindicationpowertoisolationvalves,circuitbreakers,inverters,annunciators,andotherloadssuppliedfromthe125VDCClass1EandNon-Class1Edistributionpanels.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.Theeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluated~aspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe125VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E125VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClass1E125VDCSystem.Therefore,margininthe125VDCSystemisnotaffectedbythissetpointchangepackage.

~B~.:91-112RREFEREKE911023DERlPTIFHKEstablishthesetpointsforexistingUnit1Class1E250VDCbatterychargerfailurealarmrelays,batterymonitors,andgrounddetectionalarmrelays.~MAII:I.No.H.No.III.No.The250VDCSystemprovidesreliableandcontinuouspowertosafetyrelatedpumps,valves,andpowersupplies.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.TheeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluatedaspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe250VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E250VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClass1E250VDCSystem.Therefore,margininthe250VDCSystemisnotaffectedbythissetpointchangepackage.~ER~.:91-113RREFERENE:SCPE911024DERlPTIFHANE:EstablishtherelayalarmsetpointsforexistingUnit2ClassIE24VDCbatterychargerfailurealarmrelaysandbatterymonitors.RMMMARI:I.No.II.No.III.No.~~The24VDCSystemprovidesareliableandcontinuoussourceofuninterruptedDCpowertotheprocessradiationmonitors,thesourcerangemonitors,andtheintermediaterangemonitors.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.TheeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluatedaspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe24VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E24VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClass1E24VDCSystem.Therefore,margininthe24VDCSystemisnotaffectedbythissetpointchangepackage.

RREFBRENE:SCPE911025DERIPTIFHAE:EstablishthesetpointsforexistingUnit2Class1E125VDCbatterychargerfailurealarmrelays,batterymonitors,andgrounddetectionalarmrelays.RQMMARY:I.No.II.No.III.No.The125VDCSystemprovidesreliableandcontinuouscontrolandindicationpowertoisolationvalves,circuitbreakers,inverters,annunciators,andotherloadssuppliedfromthe125VDCClasslEandNon-Class1Edistributionpanels.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.TheeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluatedaspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe125VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E125VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClasslE125VDCSystem.Therefore,margininthe125VDCSystemisnotaffectedbythissetpointchangepackage.~ER~N7.:91-115RREFFREE:SCPE911026DERIPTINFHANE:EstablishthesetpointsforexistingUnit2Class1E250VDCbatterychargerfailurealarmrelays,batterymonitors,andgrounddetectionalarmrelays.RMMMARYI.No.II.No.III.No.The250VDCSystemprovidesreliableandcontinuouspowertosafetyrelatedpumps,valves,andpowersupplies.AfailureoftheserelaystoalarmdoesnotcauseadecreaseincorecoolanttemperatureoranyotherpotentialaccidentlistedinChapter15oftheFSAR.TheeffectsofabatteryorbatterychargerfailurehavepreviouslybeenevaluatedaspartofFSARTable6.3-5SingleFailureEvaluation.Therearenootherfailuresinthe250VDCSystemwhichcanbepostulatedasaresultofthissetpointchangepackage.ThissetpointchangepackagedoesnotaffecttheoperationoftheClass1E250VDCSystem.Further,thesetpointsestablishedbythischangepackagedonotcauseafailureoftheClass1E250VDCSystem.Therefore,margininthe250VDCSystemisnotaffectedbythissetpointchangepackage.

RREFERE:DCP91-9013,Rev.0Restoresthefueloilsupplyheaderventlineandreroutestheflowingventheaderdrainlinefordieselgenerator'D'oaddressslowdieselstartingtimes.I.No.FSARChapters6and15andSections8.3.1.4and9.5.4werereviewedforthoseaccidentsorequipmentmalfunctionsforwhichthisauxiliaryfueloilsystemmodificationcouldhaveanimpact.Theprobabilityofoccurrenceofanaccidenthasnotbeenincreasedbecausethemodificationdoesnotchangethedesignbasisandoperationofthefueloilsystembutonlyservestoensurethatnormaldieselgeneratorstartingtimesareachieved.H.No.Theonlycredibleaccidentwhichthismodificationcouldaffectisthefailureofadieselgenerator.Anewfailuremodeofthefueloilsystempiping,,leadingtoadieselfailure,hasnotbeencreated.IH.No.~~InTechnicalSpecificationSection4.8.1.1.2,eachdieselgeneratorisrequiredtoreach600RPMwithin10secondsofainitiationsignal.Thismodificationdoesnotrequirearevisiontothisstartingtimerequirement,andonlyenhancestheabilityofthedieseltomeetthisrequirement.

RRE:DCP89-3018C,Rev.2DERlPTIFEoRemoveexistingheattraceandtheninstallnewheattracewithasinglepassonContainmentAtmosphereControl(CAC)solenoidvalveswhererequired.ImprovetheheattracecontrolsandtheCACsolenoidvalvetemperaturemonitoring.I.No.ThereconfigurationofheattraceontheCACsolenoidvalvesisanimprovementanddoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafety,aspreviouslyevaluatedintheFSAR.H.No.Theactiondoesnotalterthefunctionoftheheattrace.Temperaturesonthepipingwillcontinuetobemaintainedabovethedewpointofthesampledairduringnormaloperationwithreducedheattracecyclingandthermalstresstothepipingandvalves.III.No.TheReactorCoolantLeakageDetectionSystemidentifiedinSection3/4.4.3oftheTechnicalSpecificationisrequiredtomonitoranddetectleakagefromthereactorcoolantpressureboundary.Theproposedactiondoesnotaffectthedetectionsystem'sabilitytoperformit'sfunction.TheoperabilityoftheprimarycontainmentisolationvalvesidentifiedinSection3/4.6.3oftheTechnicalSpecificationensuresthatthecontainmentatmospherewillbeisolatedfromtheoutsideenvironmentintheeventofareleaseofradioactivematerialtothecontainmentatmosphereorpressurizationofthecontainment, SERM-'1-118RE:DCP89-9158A,Rev.0DERTFANEInstallationofanewpressuretransmittertomonitorHPCIStopValvebalancechamberpressurewhichwillsubsequentlyprovideforoptimumstopvalveadjustmentandoperation.R:I.No.Failureanalysesfortheproposedchangesareenvelopedbytheaccidentanalyses"InstrumentLineBreak"(FSARSection15.6.2)andMiscellaneousSmallReleases-OutsideContainment(FSARSection15.7.2.1).II.No.WorstcasescenariosforanaccidentinvolvinganinstrumenttubingrupturehavebeenconservativelyanalyzedintheFSAR.Theproposedchangedoesnotinvolveachangeinsystemoperationoraddamoreseveretypeoffailuremode.Nonewunanalyzedtypeofmalfunctionismadeprobablebythismodification.IH.No.TechnicalSpecifications3/4.3-Instrumentationand3/4.5-EmergencyCoreCoolingSystemsprovidethebasesandlimitingconditionsofoperationforassociatedplantinstrumentationandtheHPCIsystem.AllinstrumenttubinginstallationwillfollowacceptedstandardsandcodeswiththepotentialforaHPCIlinebreakscenariobeingextremelylowandoffsetbytheincreasedprobabilityofcorrectstopvalveoperationduetotheimprovedmonitoringcapabilityduringadjustment.

~ERMQ.:91-119RREFERE:NL-91-011DERIPTIFHANE:FuelPoolCleanoutProjecttoremoveallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.KSL445I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7.4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.H.No.Twotypesofaccidentsarepostulated:aloadedcaskdropscenarioanddrainingofthecaskstoragepitwithasignificantinventoryofirradiatedhardwarebecominguncovered.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARSection15.7.4.III.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.

$ERlpga.:91-120:DCP88-3046A/B,Rev.0ReplacecoolingcoilsintheUnit2RCICpumproomcoolers.~~A~Y:I.No.II.No.III.No.FSARSection9.4.2.2,9.2.5andTable9.4-1,9.4-4,9.2-2,and9.2-3providedetailsofRCICpumproomcooling.Thesesectionsandtableswerereviewedforapplicability.TheproposedmodificationstoreplacetheexistingcoilsneitheralterthefunctionnortheperformanceoftheRCICpumproomunitcoolers.Theperformance,functionandtheheatremovalcapacityofthereplacementcoilsarethesameasthatoftheoriginalcoils.Thefailuremodesassociatedwiththereplacementcoilsarethesameasthosefortheoriginalcoils.Thischangedoesnotmodifytheplantresponsetoadesignbasisaccident.TechnicalSpecificationSections3/4.7.3,relatingtoRCICpumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.ThesemodificationsdonotchangethefunctionorperformanceofRCICpumproomunitcoolers.~ERP(g.:91-121RRE:DCP88-3048A/B,Rev.0DERIPTIFHE:ReplacecoolingcoilsintheUnit2HPCIpumproomcoolers.+1~MA~Y:I.No.II.No.IH.No.FSARSection9.4.2.2,9.2.5andTable9.4-1,9.4-4,9.2-2and9.2-3providedetailsofHPCIpumproomcooling.Thesesectionsandtableswerereviewedforapplicability.TheproposedmodificationstoreplacetheexistingcoilsneitheralterthefunctionnortheperformanceoftheHPCIpumproomunitcoolers.FSARSection9.2.5.1and9.4.2.2.1discussthedesignbasisforHPCIpumproomunitcoolers.ReplacementofthecoilswillneitheralterthefunctionnortheperformanceoftheHPCIpumproomcoolersandtheymeetthedesignbasisdiscussedintheseFSARsections.Thesemodificationswillenhancethereliabilityoftheunitcoolers.TechnicalSpecificationSections3/4.3.3,and3/4.5.1,relatingtoHPCIpumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.ThesemodificationsdonotchangethefunctionorperformanceofHPCIpumproomunitcoolers.

SEXED-'1-122:DCP89-9153A&B,Rev.0DEIRemovalofexistingsealsandinstallationofnewRHRpump"Hot"sealsandsealpiping.Also,isolationofexistingsealcoolersfromtheRHRandESWfluidsystems.RemovalofESWpiping,sealcoolersandassociatedhardwaremadeobsoletebythischange.I.No.ThedesignhasbeenreviewedagainstSection5.4.7(RHR),Section6.2(containmentcooling)Section6.3(ECCS-RHR/LPCI)andSection9.2.5(ESW)toconfirmthatthedesignchangeswillnotincreasethepossibilityofanaccidentnoraffectthesubjectsystemsoranyothersystemsrelyingontheirfunction/operation.II.No.Installingthenew"HOT"sealanddeletingESWcoolingtothenewsealwillnotaffectthefunctionoftheRHRorESWsystemsoranycomponentorsystemrelyingonthesubjectsystems.ThenewsealshalleliminatetheRHR/ESWinterfacethustendingtosimplifytheoperationofthesystemsandreducethepotentialforoperationalerrororradioactivereleasestotheenvironment.TechnicalBases3/4.4.9and3/4.9.11(RHR)3/4.5.1and3/4.5.2(ECCS-OperatingandShutdown),3/4.7.1ServiceWaterSystemsand3/4.6.1PrimaryContainmentwerereviewed.ThischangewillnotalterRHRpumpfunctionalcapabilityforLPCIoperation.Also,theeliminationofESWcoolingwatertotheRHRpumpsealcoolerreducesthecoolingcapacityloadonthesystem,thusincreasingavailabilityofcoolingwaterforoperationofthesafety-relatedequipment.

DCP90-3050,Rev.0ProvidefireprotectionservicetotheTemporaryLaundryFacilityandaccesstothisFacilityfromtheUnit2TurbineBuildingthroughdoor¹32.R:I.No.II.No.III.No.FSARSection9.5.1describestherequirementsofthefireprotectionprogramandthetypesoffireprotectionsystemsinoperationatSSES.Basedontheflowandpressurecapabilitiesofthefireprotectionwatersupply,implementationofthismodificationwillnotdegradetheexistingfireprotectionasdescribedintheFSAR,Section9.5-1.Theproposedmodificationexpandstheprotectivefunctionsandisdesignedinaccordancewithoriginaldesigncriteriaandcodesimposedontheoriginalequipment.TheUnit2TechnicalSpecificationand"Bases"havebeenreviewed,specificallysectionB3/4.7.6,FireSuppressionSystems.TheTurbineBuildingSprinklerSystemisnotspecificallyaddressedintheTechnicalSpecifications.Also,SectionB3/4.8-ElectricalPowerSystemsoftheUnit2TechnicalSpecificationswerereviewed.Theproposedmodificationwilleliminateamagneticswitchandlocalalarminghornfromdoor¹32.Thedeletionwillhavenoeffectonthemarginofsafetyforelectricalpowersystemsasdescribedinthetechnicalspecifications.~ER~.:91-124RREFER:DCP90-3046,Rev.0DERIPTIFHAE:ReplacementoftubebundlesusedintheJacketWaterCoolerHeatExchangersforDieselGeneratorsA-DwithtubebundlesusingAL-6XNmaterialforboththetubesandtubesheets.QgMARY:I.No.II.No.III.No.TheproposedmodificationdoesnotincreasetheprobabilityofoccurrenceoftheaccidentsdescribedinFSARSections6.2,6.3andChapter15becausethereplacementtubebundleswillbedesigned,constructedandtestedtostandards:equivalenttothatusedfortheoriginaltubebundles.Thereplacementtubebundleshavebeendesignedtobefunctionallyidenticaltotheoriginalsexceptforthepossibilityofagreaterpressuredropthroughthetubesideofabundle.Anyadditionalpressuredropwillhowever,becompensatedforbyanincreasedopeningofthedownstreamflowbalancevalve.ThemarginofsafetyimplicitlydescribedinTechnicalSpecificationsSections3/4.7.1and3/4.8.1isnotreducedbecausethereplacementtubebundleswillbedesigned,constructedandtestedtoanequivalentstandardascomparedtotheoriginaltubebundles.

$gR~).:91-125RE:SCP791-1019Ec1020,Rev.0EoDecreasethesetpointofCoolingTowerScreenDifferentialLevelSwitchesLDIS-11506,LDIS-11507,LDISH-21506andLDISH-21507topreventtoogreatalevel/pressuredifferentialacrosstheCoolingTowerScreensbeforeactuatingwarningalarms.LNo.Neithertheswitches,thescreensortheCirculatingWaterSystemareimportanttosafetyasevaluatedintheFSARSection10.4.5.1.Thesetpointchangedoesnotaffectthedesign,function,accuracy,reliability,responsetimeoractuationlogicofanyothercomponentorsystem.Implementationofthesetpointchangealsodoesnotrequireanyphysicalmodifications.II.No.Theeffectofthechangeistoreducetheamountofscreenblockagerequiredtop'roduceanalarm.Theenhancedsensitivityallowsmoretimeforcorrectiveactionbeforetheonsetofpumpcavitation.Thedecreaseindifferentiallevelsetpointincreasessensitivitytoscreenblockagewhichenhances,notdegrades,theswitchesprotectivefunction.~~~~~~~~~~~IG.No.Theswitchesarenotsafety-relatedandtheirsetpointisnotgovernedbyTechnicalSpecifications.ThescreensandCirculatingWatersystemalsohavenosafety-relatedfunction.

0

DCP90-3056E,Rev.0DIEoProvideprotectionforsensorwiringinsidetheturbinebuildingandreactorbuildingchillercompressortransmissioncompartmentsbyroutingthewiringinsidecoppertubinginsidethetransmissioncompartmentofUnit1.AI.No.FSARSection9.2.12.3-ReactorBuildingChilledWaterSystem,FSARSection9.2.12.2-TurbineBuildingChilledWaterSystem,FSARChapter15.0-AccidentAnalyses,SER(NUREG-0776)Section9.2andtheFireProtectionReviewReportwerereviewed..TheChapter15AccidentAnalysesdonotexplicitlyaddresstheRBCWorTBCWSystems,ortakecreditfortheoperationoftheRBCWorTBCWsystemsinthemitigationofaDesignBasisAccident(DBA).TheproposedmodificationdoesnotadverselyaffecttheperformanceoftheRBCWandTBCWSystemsasdescribedintheaboveFSARsections.II.No.TheRBCWandTBCWsystemsperformancerequirementswillbemaintainedwiththeinstallationofprotectivecoppertubingontheinteriorofthechillercompressortransmissioncompartments.Sensorwiringhasbeensubjecttodamageandbreakageduetotheimpactofhighvelocityoilsprayinsidethechillercompressortransmissioncompartments.Sincebreakageofthesewirescausesthechillerstotrip,theinstallationofthecoppertubingtoprotectthewireswillpreventnuisancetripsandthereforeenhancesystemreliability.III.No.TechnicalSpecificationB3/4-BasesforSections3.0and4.0,and3/4.3-Instrumentation,Section3/4.6.1,ContainmentSystems,Sections3/4.7.1,ServiceWaterSystemsand3/4.8.4,ElectricalEquipmentProtectiveDeviceswerereviewedforimpactoftheproposedmodification.TheproposedmodificationwiHnotaffecttheoperationofanysystemasdescribedin,theTechnicalSpecifications.

~BR~N.:91-127RBFE:DCP90-3055E,Rev.0ProvideprotectionforsensorwiringinsidetheturbinebuildingandreactorbuildingchillercompressortransmissioncompartmentsbyroutingthewiringinsidecoppertubinginsidethetransmissioncompartmentofUnit2.I.No.FSARSection9.2.12.3-ReactorBuildingChilledWaterSystem,FSARSection9.2.12.2-TurbineBuildingChilledWaterSystem,FSARChapter15.0-AccidentAnalyses,SER(NUREG-0776)Section9.2andtheFireProtectionReviewReportwerereviewed.TheChapter15AccidentAnalysesdonotexplicitlyaddresstheRBCWorTBCWSystems,ortakecreditfortheoperationoftheRBCWorTBCWsystemsinthemitigationofaDesignBasisAccident(DBA).TheproposedmodificationdoesnotadverselyaffecttheperformanceoftheRBCWandTBCWSystemsasdescribedintheaboveFSARsections.II.No.TheRBCWandTBCWsystemsperformancerequirementswillbemaintainedwiththeinstallationofprotectivecoppertubingontheinteriorofthechillercompressortransmissioncompartments.Sensorwiringhasbeensubjecttodamageandbreakageduetotheimpactofhighvelocityoilsprayinsidethechillercompressortransmissioncompartments.Sincebreakageofthesewirescausesthechillerstotrip,theinstallationofthecoppertubingtoprotectthewireswiHpreventnuisancetripsandthereforeenhancesystemreliability.III.No.TechnicalSpecificationB3/4-BasesforSections3.0and4.0,and3/4.3-Instrumentation,Section3/4.6.1,ContainmentSystems,Sections3/4.7.1,ServiceWaterSystemsand3/4.8.4,ElectricalEquipmentProtectiveDeviceswerereviewedforimpactoftheproposedmodification.TheproposedmodificationwillnotaffecttheoperationofanysystemasdescribedintheTechnicalSpecifications.

fER~N.:91-128RE:DCP90-3055B,Rev.0ThismodificationwillinstallthesensorsrequiredforthenewReactorBuildingChiller"B"diagnosticsystem.I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheadditionofthesensorswillonlyaffectportionsoftheSWandRBCWsystemsassociatedwithchiller2K206B.II.No.TheproposedmodificationwilladdsensorsrequiredforadiagnosticsystemwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.ThesensorswillbedesignedandinstalledinaccordancewiththeoriginalcodesofconstructionlistedinFSARSection3.TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyadditionofthesensors.III.No.RBCWSystemandtheSWSystemoperationdoesnotcontributetothemarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6,3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2and3.Theserequirementsarenotaffectedbythismodification.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

~ER~N.:91-129RR:DCP90-3055A,Rev.0DERTPTIFThismodificationwillremovetheexistingReactorBuildingChiller"B"ventanddrainlinesandreplacethemwithdrainlinesdesignedtoaUeviatecloggingproblems.SIIMhfARF.'.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.AsstatedinFSARSection9.2.1,theSWSystemisdesignedtooperateduringnormalplantoperationandplantshutdownwithoffsitepoweravailable.TheSWSystemwillnotoperateonlossofoffsitepowerconcurrentwithaLOCA.TheSWSystemoperationhasnosafetyrelatedfunction,andfailureofthesystemwillnotcompromiseanysafetyrelatedsystemorcomponentorpreventasafenuclearshutdown.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.II.No.TheproposedmodificationwillreplaceexistingventanddrainlineswhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.III.No.RBCWSystemandtheSWSystemoperationdoesnotcontributetothemarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6-3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2and3.Theserequirementsarenotaffectedbythismodification.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

~ER~.:91-130:DCP90-3025,Rev.0ProvidesfortheinstallationoftheUnit2TurbineandReactorBuildingsamplestationsandtheconnectionoftheprocesssamplestreamsandinterfacesystems,includingwaterchillerunitstothesamplestations.$Q~ARFI.No.ThereviewofFSARSections6.2.3.2.3.1,6.2.4.3.3.5and9.2.23indicatethattheRBCCWSystemcontainmentpenetrationsandisolationvalvesperformcontainmentisolationfunctionswhichareimportanttosafety.Theinstallationofnewpipingdoesnotaffectthesefunctions.AreviewoftheFSARSection9.4.2.1.3indicatesthatReactorBuildingZoneIfilteredexhaustandZoneIunfilteredexhaustinterfacewiththerecirculationsystemviasecondarycontainmentisolationdampers.ThesedamperswhichareimportanttosafetyfortheReactorBuilding,andtherecirculationsystemandtheStandbyGasTreatmentSystemarenotaffectedbythismodification.II.No.~~TheprocesssamplesystemdescribedinFSARsection9.3.2.3doesnotperformanysafetyfunctions.Samplelinesmadeoperationalbythischangeareonlyforchemistrymonitoringandprovidenodirectcontrolfunctions.Malfunctionofthesamplestationsorthemodulatingdamperisnotamalfunctionofadifferenttypethanpreviouslyevaluatedbecauseitdoesnothaveanadverseaffectonthesafetyfunctionofthereactorbuildingrecirculationsystemoperation.IH.No.ThismodificationdoesnotreducethemarginofsafetysincetheinterfacesbeinginstalledfortheTBSSandRBSSarenotsafety-relatedanddonotaffectanymarginsofsafetydescribedintheTechnicalSpecifications.TheacceptancelimitsfortheRCSchemistryasnotedintheTechnicalSpecificationSection3/4.4.4willnotbeaffectedasaresultofthismodification.

DCP89-9151,Rev.0Locationoftwo"A"andtwo"B"looptemperatureelementsoneeachintothenorthsideandsouthsidereturnairductsoftheControlStructureHVACsystempriortothemixingofreturnair,outsideair,ortheCREOASSairfiows.SMALL':I.No.FSARsections6.4,7.3and9.4providedescriptionsoftheHVACsystems.Thereferenceswerereviewed,anditwasdeterininedthismodificationmaintainsthefunctionoroperationoftheexistingControlStructureHVACSystemElectricalseparation,equipmentqualification,10CFRAppendixRrequirements,seismicmountingandotherdesignconsiderationsareincorporatedinthedesignoutputdocuments.II.No.Thenewtemperaturemonitoringcircuits'ailuremodeisthesame.Theycanfailhighorlow.Ifthetemperatureelementsandtemperaturetransmitterfail,thisconditionisnowalarmed.Thisisanenhancementovertheoriginaldesign.Ifthetemperatureselectorweretofail,itcanonlyfailhighorlow,whichisexactlythesamefailuremodeastheexistingsystem.Therelocationofthetemperatureelementsandhightemperatureselectordoesnotintroduceadifferentfailuremode,butimprovesontheoldsystembyprovidinganalarmontemperatureelementfailure.III.No.RequirementsfortheControlStructureHVACsystemarenotspecificallyaddressedbytheTechnicalSpecifications,exceptthatSection3/4.7.2oftheTechnicalSpecifications,ControlRoomEmergencyOutsideAirSupplySystem(CREOASS),requirestwoindependentandoperablesubsystemsofemergencyoutsidesupplyairfortheControlRoom.TheControlStructureHVACsystemisincludedbyinferenceinSection3/4.7.2inthatithastobeoperationalwhenCREOASSisoperational.ThismodificationdoesnotaffecttheabilityoftheinstrumentloopstomeettherequirementsoftheControlStructureHVACsystem,butenhancesoperabilitybyprovidingamorerepresentativereturnairtemperatureforcontrol.

/ERIN.":91-132:DCP88-3049A&B,Rev.1PTIReplacementofcoolingcoils1E230A/B/C/DwhicharelocatedintheRHRpumproomcoolers1V210A/B/C/Dwithnewcoilsduetocorrosionandlocalizedpitting.R:I.No.NoneofthedesignbasisaccidentsdiscussedinFSARSection15areaffectedbythesemodifications.Further,thefunctionandperformanceofthecoolingcoilsisnotalteredbythesemodifications.Failuremodesassociatedwiththereplacementcoilsaresameastheoriginalcoilsandthefailuremodesoftheoriginalcoilsdonotbecomeaninitiatingeventforanydesignbasisaccident.II.No.FSARSection9.2.5.1and9.4.2.2.1discussthedesignbasisforRHRpumproomunitcoolers.ReplacementofthecoilswillneitheralterthefunctionnortheperformanceoftheRHRpumproomcoolersandtheymeetthedesignbasis.discussedintheseFSARsections.Thesemodificationswillenhancethereliabilityoftheunitcoolers.III.No.~~AlthoughSSESTechnicalSpecificationdoesnotincludespecificrequirementsforRHRpumproomcoolers,theyarerequiredasattendantcoolingfortheRHRpumps.Therefore,TechnicalSpecificationSections3/4.4.9,3/4.5.1,3/4.5.2,3/4.6.2.2,3/4.6.2.3,3/4.9.11.1and3/4.9.11.2,relatingtoRHRpumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.ThesemodificationsdonotchangethefunctionorperformanceofRHRpumproomunitcoolers.

/BRAN.:91-133RREFEE:DCP90-9007M,Rev.0DERlPTIFHANE:Circuitmodificationsandinstallationofqualifiedisolationdevicestopreventinteractionbetweentheclass1Eandnon-class1EportionofcircuitsinMainSteamdrain,RWCU,RHRandMainSteamRadmonitors.~ilARY:I.No.Theproposedactionprotectsthesafetyfunctionsofclass1Ecomponentsofthevarioussystemsunderconsideration.Itdoesnotchangetheoperationoftheinstrumentationloopsortheplantoperator'sinterfacewiththeseloopsoranyothersafetyrelatedequipment.Hence,theproposedactiondoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofsafetyequipment,aspreviouslyevaluatedintheFSAR.H.No.ThismodificationprovidesacceptableisolationbetweenClass1Eandnon-Class1EinterfacewiringasdescribedinFSARSection8.1.6.lqanddoesnotcreateapossibilityforanaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR.III.No.ThischangehasnodirectimpactontheoperationofthecontainmentisolationvalvesdescribedinSection3/4.6.3andTable3.6.3-1oftheTechnicalSpecifications.TheisolationactuationinstrumentationrequirementsforRWCUdifferentialflowandmainsteamlineradiationmonitoringasindicatedinTable3.3.2-1oftheTechnicalSpecificationarenotaffectedbytheproposedmodification.Similarly,ithasnoimpactonthereactorprotectionsysteminstrumentationorresponsetimesformainsteamlineradiationasrequiredbyTables3.3.1-1and3.3.1-2oftheTechnicalSpecification.

~ER~.:91-134:SCP-J-90-1040Changefrom85'Fto123'FfortemperatureswitchesTSH-27702A2andTSH-27702B2associatedwithdrywellunitcoolers2V411Aand2V411Btoeliminatenumerousfalsealarms.I.No.ThischangedoesnotaffectanyoftheaccidentsdiscussedinFSARSection15.Further,thissetpointchangedoesnotalterthefunctionandperformanceofthedrywellunitcoolers2V411A&2V411B.ThischangedoesnotalterthefailuremodesassociatedwitheitherTSH-27002A2andTSH-27002B2orthedrywellunitcoolers2V411Aand2V411B.Further,FSARSections9.45,7.3.1.1b.8.5.6andtables9.4-8,9.4-9,9.4-10providedetailsofDrywellCoolingSystem.Thesesectionsandtableswerereviewedforapplicability.Theproposedchangehasnoimpactonthesesectionsandtables.II.No.FSARSection9.4.5.1discussesthedesignbasisfordrywellcoolingsystemincludingunitcoolers2V411A&B.ThischangedoesnotalterthefunctionandtheperformanceofanyoftheabovedrywellunitcoolersanditdoesnotalterthedesignbasisdiscussedintheFSAR.Thischangewilleliminatefalsealarms.III.No.SSESTechnicalSpecificationsections3/4.6.1.7wasreviewedforapplicability.Thischangeneitherreducestheoperabilityofanyequipmentnorrequiresadditionalsurveillancetoensureplantsafety.Thischangedoesnotchangethefunctionorperformanceofdrywellunitcoolers2V411A&B.

~ER~N.:91-135RREFERE:DCP90-9074,Rev.1DERIFHE:RemovalofexistingTopazStaticInvertersB21B-K801AandB21B-K801Binpanels2C614Cand2C614DandreplacementwithequivalentTopazInverterstoprecludeimminentfailureduetocapacitoraging.RRMMARY:I.No.TheRCICinvertersandthetemperatureswitchesandisolationvalvesareredundant.Failureofasingleinverterorswitchtodetectaleakdoesnotprecludedetection.Theothermethodsofleakdetectionprovidebackupforthetemperatureinstruments.(Ref.FSAR7.6.1a.4.3.3)Additionally,thereplacementinvertersarefunctionallyequivalentinallrespectsofstandardsandspecificationandperformanceastheoldinverters.H.No.Theproposedchangedoesnotaffectanysystemotherthanleakdetectionandbatteries2D630and2D640.Thischangedoesnotaffecttheabilitytodetectandisolateleakage.Additionally,thereplacementinvertersrepresentanupgradedversionofequipmentequivalentinperformancestandards.TheproposedchangesatisfiesthebasesforSection3/4.3.2and3/4.8byensuringthatthereplacementinvertersperformthesamefunctionandmeetalldesignrequirementsforprovidingpowertotheRCICSteamLeakDetectionSystemfromthe125VDCbatteries2D630and2D640anddoesnotreduceanymarginofsafetydefinedforanytechnicalspecification.

te

~ER~N.:91-136RRE:DCP90-9051,Rev.0DERIPTIHE:Thismodificationwillinstallgravitydrainsinthefollowingmanholes:MH2510,MH2511,MH2512,MH2513,MH2031andMH2032todecreasethefrequencyofweatherinducedflooding.R:I.No.TheFSARhasbeenreviewed,specificallySections9.2.5-ESWSystemand9.2.6-RHRSWSystem.Theadditionofgravitydrainsintheinstrumentationpitsandmanholeswillonlyremoveunwantedgroundwaterfromtheseareasthusincreasethereliabilityofinstrumentationandcircuitsinvolvedwiththesesystems.TheFSARdoesnotspecificallyaddressInstrumentationPitsand/orConduitManholes.TheFSAR,Section3.2.1,doesstate,however,thatplantstructures,systems,andcomponentsincludingtheirfoundationsandsupportsdesignedtoremainfunctionalintheeventofaSafeShutdownEarthquake,aredesignatedasSeismicCategoryI.Sincethesemanholeshousesafetyrelatedequipment,thesestructuresareanalyzedforseismicconditions.Addingdrainsinthesemanholeswillnotdegradeorhaveanystructuralaffectonthemanholesabilitytoresistanearthquakeoranyothertypeoffailurethestructuresweredesignedtowithstand.H.No.TheadditionofdrainswithinthesixconduitandinstrumentationmanholessouthoftheESSWPumphousedoesnotchangethefunctionand/oroperationofanyplantcomponentorsystem.Thismodificationdoesnotaffectthesafetyfunctionofanyequipment,therefore,nonewunanalyzedtypeofmalfunctionimportanttosafetyiscreated.IH.No.TechnicalSpecificationsandbaseshavebeenreviewed,specificallySections3.3.7.4-RemoteShutdownMonitoringInstrumentation,3.7.1.1RHRSWSystemand3.7.1.2-ESWSystem.ThedrainswillnotalteranysystemorsystemfunctionasitrelatestosupportingsafetyrelatedcomponentsasrequiredbytheTechnicalSpecifications.

DCP90-9034B,Rev.0ThismodificationwilleliminatealarmPAL03341,GeneratorHydrogenSupplyBulkStorageLowPressure,andpressureswitchPSL03341theoriginatingsourceofthealarmsignal.KSBILY:I.No.FSARSection3.2-ClassificationofStructures,ComponentsandSystems,Section10.2.2.2-GeneratorandExciter,andChapter15-AccidentAnalysiswerereviewedtodeterminetheimpactofthismodification.Chapter15ofFSARdoesnotexplicitlyaddressthebulkhydrogenstoragesystemortakecreditforthebulkhydrogenstoragesysteminthemitigationofaDesignBasisAccident(DBA).II.No.Theproposedactiondoesnotchangethebasicfunctionoftheexistinghydrogenstoragesystem,itonlydeletesanuisancealarm.ThedesignandimplementationofthismodificationwillbeconsistentwithPP&L'sexistingstandardsandtechnicalengineeringguidelines.III.No.~~TheTechnicalSpecifications,especiallysections:3/4.7-PlantSystems,3/4.8-ElectricalPowerSystems,andB3/4-Basesforsections3and4werereviewed.Nomarginofsafetyorlimitingconditionsrelatedtothebulkhydrogenstoragesystemwerefound.

~ER~N.:91-138RREFEREE:DCP90-3064F,Rev.0DERIIntheUnit1ReactorBuildingChiller1K206B,theexistingair-operatedbutterflyvalveswillbereplacedwithnewcontrolvalveshavinganequalpercentagecontrolcharacteristics,highturndownratio,andincreasedanticavitationprotection.R:I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandthecontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewtemperaturecontrolvalvesandtheirtemperaturecontrollerwillaffectonlyaportionoftheSWSystemassociatedwiththechillercondenserwatercirculatingpump.II.No.TheproposedmodificationwillinstallnewtemperaturecontrolvalvesandtheirtemperaturecontrollerwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.TheexistingmethodoftheservicewatertemperaturecontrolbyrecirculationoftheServiceWaterasdescribedinFSARSection9.2.1.2willbeunchanged.III.No.TheRBCWSystemandtheSWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalspecifications(Unit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

RREFEE:DCP90-3060,Rev.0DERIPTINE:IntheUnit2ReactorBuildingChiller2K205A,theexistingair-operatedbutterflyvalveswillbereplacedwithnewcontrolvalveshavinganequalpercentagecontrolcharacteristics,highturndownratio,andincreasedanticavitationprotection.SUMMARY:I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandthecontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewtemperaturecontrolvalvesandtheirtemperaturecontrollerwillaffectonlyaportionoftheSWSystemassociatedwiththechillercondenserwatercirculatingpump.II.No.TheproposedmodificationwillinstallnewtemperaturecontrolvalvesandtheirtemperaturecontrollerwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribed'inFSARSection9.2.1.1and9.2.12.3.TheexistingmethodoftheservicewatertemperaturecontrolbyrecirculationoftheServiceWaterasdescribedinFSARSection9.2.1.2willbeunchanged.HI.No.TheRBCWsystemandtheSWsystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

~ER~.:91-140R:DCP90-3058F,Rev.0IntheUnit1ReactorBuildingChiller1K206A,theexistingair-operatedbutterflyvalveswillbereplacedwithnewcontrolvalveshavinganequalpercentagecontrolcharacteristics,highturndownratio,andincreasedanticavitationprotection.KMILY:I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandthecontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewtemperaturecontrolvalvesandtheirtemperaturecontrollerwillaffectonlyaportionoftheSWSystemassociatedwiththechillercondenserwatercirculatingpump.H.No.TheproposedmodificationwillinstallnewtemperaturecontrolvalvesandtheirtemperaturecontrollerwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.TheexistingmethodoftheservicewatertemperaturecontrolbyrecirculationoftheServiceWaterasdescribedinFSARSection9.2.1.2willbeunchanged.III.No.TheRBCWsystemandtheSWsystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalspecifications(Unit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

DCP89-9173,Rev.0RemovaloftheexistingautomaticAirReliefValvesfromtheventlinesontheservicewatersideoftheMainGeneratorHydrogenCoolersandAterexAirCoolersinorderthatventingofthecoolerscanbedonemanuallyandpositivelyverifiedbyvisualinspectionforUnit1./gal(~RF:I.No.TheGenerator,Aterex,GeneratorHydrogenCoolersandAterexAirCoolersareequipmentrequiredforpowergenerationonlyperFSARSections10.1and10.2.Thereisnosafetyfunctionassociatedwiththisequipment,neitherisanyequipmentimportanttosafetyaspreviouslyevaluatedintheFSARconnectedtoorlocatednearthisequipment.II.No.Theventpipingwillbeinstalledandsupportedperalloriginalconstructioncodesandstandards.Anypotentialfailuremodeoftheproposedactionsuch.aspipefailure,valveleakageoroperatorerrorwillnotimposeanymalfunctionofadifferenttypethanthatoftheexistingpipingassociatedwiththesubjectcoolers,andwillnothaveanyeffecttotheplantsafetyfunction.TheUnitITechnicalSpecificationshavebeenreviewed.TheGeneratorHydrogenCoolersandtheAterexAirCoolersdonotformanydesignbasesorlimitingoperatingconditionsasspecifiedintheTechnicalSpecification.TheproposedactiondoesnotalterthecurrentdesignbasesoftheGeneratorHydrogenCoolersandtheAterexAirCoolers.

~ER~.:91-142:DCP88-3051A&B,Rev.1Replacementofcoolingcoils1E231A/B/C/Dwhicharelocatedinthecorespray(C.S.)pumproomcoolers1V211A/B/C/DbecauseofcorrosionandlocalizedpittinginUnit1.$Qg~gY:I.No.ThesemodificationsdonotaffecttheaccidentsdiscussedinFSARsection15.Further,thefunctionandperformanceofthecoolingcoilsisnotalteredbythesemodifications.Failuremodesassociatedwiththereplacementcoilsarethesameastheoriginalcoilsandthefailuremodesoftheoriginalcoilsdonotbecomeaninitiatingeventforanydesignbasisaccident.II.No.FSARSections9.2.5.1and9.4.2.2.1discussthedesignbasisforC.S.pumproomunitcoolers.ReplacementofthecoilswillneitheralterthefunctionnortheperformanceoftheC.S.pumproomcoolersandtheymeetthedesignbasisdiscussedintheseFSARsections.Thesemodificationswillenhancethereliabilityoftheunitcoolers.III.No.~~AlthoughSSESTechnicalSpecificationdoesnotincludespecificrequirementsforCoreSpraypumproomcoolers,theyarerequiredasattendantcoolingfortheCoreSpraypumps.Therefore,TechnicalSpecificationSections3/4.5.1and3/4.5.2relatingtoC.S.pumpoperabilitywerereviewedforapplicability.Thesemodificationsneitherreducetheoperabilityofanyequipmentnorrequireadditionalsurveillancetoensureplantsafety.ThesemodificationsdonotchangethefunctionorperformanceofCoreSpraypumproomunitcoolers.

~ER~N.:91-143E:ES-158/258-001DERlP77NE:Thisproceduredirectsremovalofeight(8)fusesfromtheRPSelectricalcircuitleadingtoSCRAMpilotvalvesolenoidsinordertode-energizethesolenoidsandcauseareactorSCRAM.+I~M'ARY:I.No.ItIntentoftheproposedprocedureistoprovideanalternatemethodofopeningscramvalveswhenRPSdoesnotfunctionperdesign.RemovingfusesinelectricalcircuitspoweringSCRAMpilotvalvesolenoidsresultsinde-energizingSCRAMpilotvalvesolenoidssimilartodesignwhichde-energizesthecircuits.DesignbasisaccidentanalysesintheSARarenotaffectedsincetheproposedprocedureisonlyimplementedperemergencyoperatingprocedureswhenatransienthasprogressedwellbeyondsinglefailurecriteriaestablishedinFSAR15.0.3.2.1.1.II.No.Theplantmodificationcreatedbytheproposedproceduredoesnotcreateaconfigurationwhichcouldresultinanewtypeofaccidentorincreasetheprobabilityofanaccidenttothepointwhereitshouldbeconsideredwithinthedesignbasis.IntentofproposedprocedureistoopenscramvalveswhenRPSdoesnotfunctionperdesignwhenrequiredtoinitiateareactorSCRAM.RemovingfusesinelectricalcircuitspoweringSCRAMpilotvalvesolenoidsresultsinde-energizingSCRAMpilotvalvesolenoidssimilartodesignwhichde-energizesthecircuits.III.No.TechnicalSpecification3/4.3.1providesthelimitingconditionsforoperationnecessarytopreservetheabilityofRPStoperformitsintendedfunctionevenduringperiodswheninstrumentchannelsmaybeoutofserviceformaintenance.ThepurposeofES-158/258-001isthesameasthebasesdescribedinTechnicalSpecificationsbases.PullingRPSfusestoinitiateareactorSCRAMasproposedinES-158/258-001isonlyperformedafterRPSfailstoautomaticallyperformitsdesignfunction,thatis,atransienthasprogressedwellbeyondsinglefailurecriteriaestablishedinFSAR15.0.3.2.1.1.

/ERIN.:91-144RREFREE:DCP91-9013A,B&C,Rev.0DERIPTIFHANE:ThesemodificationsrestorethefueloilsupplyheaderventlineandreroutestheflowingventheaderdrainlineforDieselGenerators'A','B'nd'C'.ZllMMARY:I.No.FSARChapters6and15andSections8.3.1.4and9.5.4werereviewedforthoseaccidentsorequipmentmalfunctionsforwhichtheseauxiliaryfueloilsystemmodificationscouldhaveanimpact.Theprobabilityofoccurrenceofanaccidenthasnotbeenincreasedbecauseeachmodificationdoesnotchangethedesignbasisandoperationofthefueloilsystembutonlyservestoensurethatnormaldieselgeneratorstartingtimesareachieved.H.No.Theonlycredibleaccidentwhichthemodificationscouldaffectisthefailureofadieselgenerator.Anewfailuremodeofthefueloilsystempiping,leadingtoadieselfailure,hasnotbeencreatedsincethischangerestoresatubinglinethatwasoriginallysuppliedbythedieselgeneratormanufacturer.III.No.~~TheonlyapplicablemarginofsafetyaffectedbythismodificationiscontainedinTechnicalSpecificationSection3/4.8andconcernsthestartingtimeoperabilityrequirementsforthedieselgenerators.InTechnicalSpecificationSection4.8.1.1.2,eachdieselgeneratorisrequiredtoreach600RPMwithin10secondsofainitiationsignal.Thesemodificationsdonotrequirearevisiontothisstartingtimerequirement,andonlyenhancestheabilityofthedieseltomeetthisrequirement.

~ER~N.:91-145RREFERENE:DCP90-3108AthruD,G&H,Rev.0DERlPTINFANE:Modificationstoexistingpipesupport/restraintconfigurationsthatarerequiredinordertoreducethetotalnumberofmechanicalsnubbersonSSESpipingsystemsforDieselGeneratorA,B,C&Dpiping,CREOASSandESWcommonvalvevaultareapiping.~~i~RY:I.No.Applicablecodedesignlimitshavebeenmettoensurepipingintegrityandsystemfunction;FSARSection15.0.3.1.Theaccidentevents/causesdescribedinFSARSection15.1through15.8donotinvolvesystemsorcomponentsincludedinthisaction.II.No.Theactiononlyreducesthenumberofseismicandhydrodynamicrestraints(snubbers)onselectedpipingsystemsbyreanalyzingeachlineusingoptimumrestraintconfigurations.Theoriginalallowableequipmentinterfaceloadsarestillbeingmet.Removalofsnubbersfromthermallyactivelineswillactuallyminimizethechallengestothesystemsbyeliminatingpotentialsnubberfailurelocations;e.g.asnubberlock-upcancreatelargereactionloadsand/ordamagingpipestresses.III.No.TechnicalSpecifications3/4.8.1,3/4.3.7,3/4.7.2,3/4.7.1and3/4.7.4werereviewed.Ineachcase,thereviewmarginofsafetyisnotreducedandthecapabilityofthesystemtoperformitsintendedsafetyfunctionisnotaffected.

SCP-J91-1034SetpointchangeforSGTScharcoalbedinletandoutletpre-ignitiontemperaturealarminstrumentationtoavoidiodinedesorptionandtopreventspuriousactuationsduringnormalsystemoperation.I.No.TheSGTSsystemdesignasdescribedintheFSARwillnotbeaffectedbythisproposedchange.TheabilityforSGTStorespondtodesignbasiseventsasassumedintheFSARtransientandaccidentanalysiswillnotbeaffected.ThischangedoesnotaffectanyoftheinstrumentationrequiredforSGTSinitiationunderpostulatedaccidentconditions.TheabilityforSGTStopurgethecontainmentafterpostulatedtransientswhichresultinSRVdischargewillnotbeaffected.FSARSections3.13,6.2.3,6.5,7.3.1.1b.4,9.4.2,11.5.2andCh.15werereviewed.II.No.ThebasisforthischangeistoassureproperoperationoftheSGTScoolingmode~~byestablishingappropriatesetpoints.Thischangeisachangetosetpointsonlyanddoesnotinvolveanynewequipmentornewfailuremodes.III.No.TheUnit1andUnit2TechnicalSpecificationshavebeenreviewed,specificallySections3/4.6.5.1,3/4.6.5.2,and3/4.6.5.3.TheproposedsetpointchangeasdescribedabovedoesnotreducethemarginofsafetyassetforthintheTechnicalSpecificationBases.ThischangewillenhanceSGTScoolingmodeoperabilityasrequiredbyTechnicalSpecification4.6.5.3.d.3.

/BR'.:91-147RREF8:NL-91-024,Rev.0IncreasethesetpointfortheRWCUSteamLeakDetectionSystem-PenetrationRoomHighTemperatureIsolationSetpoint.ThisactionisrequiredinordertoprovidesufficientmarginabovetheexpectedroomtemperaturetoprecludeinadvertentisolationoftheRWCUSystem.~ilARY:I.No.Thedesignbasisestablishedforthenewtemperaturesetpointsistimelydetectionofa25gpmprimarycoolantleakfromtheRWCUsystem.ExistingaccidentswhichresultincoolantleakageoutsidecontainmentareanalyzedinFSAR15.6.2and15.6.4.Theseanalysesboundtheplants'bilitytorespondtoa25gpmRWCUsteamleak.II.No.Implementingthissetpointchangedoesnotcreateanynewaccidentsormalfunctionsofadifferenttype.ItimplementstheSteamLeakDetectiondesignbasisthatwasbelievedtohavealreadyexisted.Thatis,toprovidetimelydetectionandisolationforsmallprimarycoolantleakswhileallowingsufficientmarginabovetheexpectedroomtemperaturestopreventinadvertentisolations.~~III.No.TechnicalSpecification3.3.2basissectiondoesnotaddressthesetpointbasiswithregardstoleakagerate.Thebasesdoeshoweverstate"thesetpoints...areestablishedatalevelawayfromthenormaloperatingrangetopreventinadvertentactuationofthesysteminvolved."TemperaturemeasurementisnotdiscussedinthebasisforTechSpecSection3.4.3"ReactorCoolantSystemLeakage".TheproposedsetpointchangesatisfiesthebasisstatedinSection3.3.2byallowingsufficientmarginabovethemaximumoperatingtemperatureswhilestillperformingitsintendedsafetyfunction.

SCPJ-91-1018,Rev.0E:IncreasethesetpointofCondensatePump,RoomTemperatureSwitchTSH-27442toreducethepotentialforfalseactuations.r~g4RY:I.No.Neithertheswitch,theCondensatePumpRoomCoolingSystem(CPRCS)ortheCondensateSystemareimportanttosafetyasevaluatedinFSARSections9.4.4.2,9.4.4.3,10.4.7.1.Furthermore,theequipmentintheCondensatePumpRoomisdesignedtofunctionwithintheoperatinglimitsspecifiedintheFSAR.Althoughthesetpointishigherthanbefore,itislowenoughtoinsurethatthestandbycoolingunitandtroublealarmsareactuatedbeforethetemperatureexceedstheFSARlimit.II.No.Thesetpointchangedoesnotaffectthedesignorfunctionoftheswitchoranyothercomponentorsystem.Nor,doesitcauseanycomponentorsystemtooperateoutsidetheperformanceboundariesdescribedintheFSARorTechnicalSpecifications.~~~~~~III.No.Neithertheswitch,theCPRCSortheCondensateSystemaresafety-related.Furthermore,theCondensatePumpRoomTemperatureHighSetpointisnotgovernedbyTechnicalSpecifications.

~ER~N.:91-149RREFEE.NL-91-023,Rev.0DERIPTIFHANE:Inspectionofirradiatedfuelrodstodeterminetheconditionofthefuelassembliesfollowingirradiation.MMARY:I.No.FSARSection9.1.4.2.7.1,9.1.4.3.7,9.1.4.5.1,9.1.5and15.7.4werereviewed.ThefuelinspectionsarenotcoveredintheFSAR.Thereviewevaluatedhandlingfuel,droppingequipmentinthespentfuelpool,andinteractionwithplantauxiliarysystemswhicharesimilartoeventspreviouslyevaluatedintheFSAR.II.No.Potentialneweventsevaluatedwere,(1)radiationstreamingontherefuelingfloor,(2)damagetotherefuelingfloorcurb,(3)damagetoafuelrodduringinspection,(4)hotparticlesand,(5)adroppedfuelrod.Theuseoftheinspectionequipmentortechniquesdoesnotcreateanyhazardotherthanthosepreviouslyevaluated.IH.No.~~TechnicalSpecifications3/4.9.6,3/4.9.7and3/4.9.9werereviewed.Theproposedfuelinspectionswillnotreduceanymarginofsafetybecause(1)theequipmentisdesignedtoperformfuelinspections,(2)aminimumof7feetofwatershieldingwillbemaintainedaboveirradiatedcomponents,(3)theradiologicalconsequencesoffueldamagethatcouldoccurduringtheinspectionarelessthanthosepreviouslyevaluatedintheFSAR,and4)allfuelhandlingoperationswillbeperformedinaccordancewithRE-081-102,'FuelMovementsWithinVaultandPoolLocations,whichrequiresallTechnicalSpecificationsrelatedtofuelhandlingtobecompliedwithpriortoandduringalloperationsrelatedtomovingirradiatedfuelinthespentfuelpool.

NL-91-012,Rev.1HottapofUnit1TBCCWandRBCCWheaderstosupportReactorBuildingandturbineBuildingsamplestationreplacement.BlggLAAZ:I.No.AfterreviewingFSARSections15.1thru15.8,itwasdeterminedthatthehottappingofRBCCWandTBCCWdoesnotincreasetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafetyaspreviouslyevaluatedintheSAR.ThereviewofFSARSection9.2.3indicatesthattheTBCCWsystemperformsnosafety-relatedfunction.ThereviewofFSARSection9.2.2indicatesthattheRBCCWSystemcontainmentpenetrationsandisolationvalvesperformcontainmentisolationfunctionswhicharesafetyrelated.Theoperabilityofthecontainmentisolationvalveswillnotbejeopardizedduetothelocationofthehottas.~~PII.No.InaccordancewithFSARSections9.2.2and9.2.3,theRBCCWandTBCCWlinesarenotrequiredtofunctionafteranaccident.III.No.TechnicalSpecificationSections3/4.6.1and3/4.6.3containrequirementsfortheRBCCWPrimaryContainmentIsolationValveleakageintegrityandoperability.TheRBCCWhottapswhicharebeingperformeddonotmakeanydirectchangestothesevalves.TheTechnicalSpecificationsdonotaddresstheTBCCWsystemsinceithasnofunctionwhichisimportanttosafety.HottappingofthissystemwillnotreducetheplantmarginofsafetyasdefinedinthebasisforanyTechnicalSpecifications.

RREFEREE,NL-91-011,Rev.1Removalofallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.~V~ARY:I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7.4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.II.No.Irradiatedhardwarewillbeloadedandtransportedincaskssimilartospentfuelcasks.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARSection15.7.4.III.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.ThefollowingTechnicalSpecificationswerereviewed:3/4.3.2,3/4.3.7,3/4.9.6,3/4.9.7,3/4.9.9,3/4.11.3,3/4.11.4,5.6.2,6.9.1.8and6.13.

DCP90-9103,Rev.0SplitthedifferentfunctionsoftheCirculatingWaterPumps(1P501A,B,C,D)AuxControlCircuit(scheme1C1026)toassurereceivingalocalalarmonpanel1C511intheCirc.WaterPumphouseandtoassurecontrolpowertoscheme1C1026.I.No.TheDCPowerSystemsdesignbasisandfunction,aspreviouslyevaluatedinFSARsection8.3.2andMJREG0776Section8.3.2isnotalteredbythismodification.II.No.TheproposedmodificationdoesnotalterthefunctionorthedesignbasisoftheCirculatingWaterSystemoritsannunciationsystem.CirculatingWaterSystemreliabilityisenhancedbyseparatelyfusingtheswitchgearbreakerauxrelaysfromthestartandstopinterlockrelaysonscheme1C1026.Thenon-Class1E125VDCpowersupplyisisolatedfromtheClass1EpowersupplyinaccordancewithFSARSection8.1.6.lq.5(iii).Thisdesignhasnodifferentfailuremodesoreffectsthanthosepreviouslyanalyzedforthissystem.III.No.TheCirculatingWaterSystemisasystemthatdoesnothaveasafetyfunctionanditsoperabilitydoesnotcontributetothemarginofsafetyasdefinedinthebasisoftheTechnicalSpecifications.TherelayandtheindicatinglightsrequiredforthischangerequireDCpowersupplyfromthe125VDCsubsystemswhoseoperabilityisgovernedbyTechnicalSpecificationSection3/4.8.2.TheadditionofaDCloadofapprox.260mAdoesnotdegradetheperformanceofthe125VDCsubsystems.

'CP90-3060C,Rev.0Replacethenon-classlEcontrolswitchHS-28723A&Bwhichoperatestheevaporatorwatercirculatingpump2P217A&Bandthecondenserwatercirculatingpump2P235A&BinReactorBuildingChillerstopreventcircuitbreakertripinstantaneouslyonhighinrushcurrent.I.No.Thereplacementcontrolswitchisspecifiedtothesamecriteriaastheexistingcontrolswitch.ThefunctionoftheReactorBuildingChilledWaterSystemisnotmodifiedbythisaction.However,theswitchinglogicwillbeimproved,eliminatingunnecessarytrippingofpumps2P235A(2P235B)and2P217A(2P2178)whencontrolswitchHS-28723A(HS-28723B)ismovedfrom"Auto"to"Start"position.II.No.ThesemodificationsaddnonewfunctiontotheReactorBuildingChilledWaterSystemasdescribedinFSARSections9.2.2and9.2.12.3.Thesemodificationschangeswitchinglogictopreventunnecessarytrippingoftheevaporatorwaterpumpandthecondenserwaterpump,whichimproveschillerreliability.III.No.TheoperationoftheReactorBuildingChilledWaterSystemhasnosafetyrelatedfunction.Althoughisolatedportionsofchilledwaterpipingofthecontainmentaresafetyrelated,theseportionsarenotaffectedbythismodification.ThesemodificationsaffectcontrolswitchHS-28723A(HS-28723B)whichispartofthenon-safetyportionoftheReactorBuildingChilledWaterSystem,whichisnotaddressedintheTechnicalSpecification.

/ERIN.:91-154:DCP90-3058Cand90-3064C,Rev.0DERlFHE:Replacethenon-classlEcontrolswitchHS-18723A&Bwhichoperatestheevaporatorwatercirculatingpump1P217A&Bandthecondenserwatercirculatingpump1P235A&BinReactorBuildingChillerstopreventcircuitbreakertripinstantaneouslyonhighinrushcurrent.SllKAfARY:I.No.Thereplacementcontrolswitchisspecifiedtothesamecriteriaastheexistingcontrolswitch.ThefunctionoftheReactorBuildingChilledWaterSystemisnotmodifiedbythisaction.However,theswitchinglogicwillbeimproved,eliminatingunnecessarytrippingofpumps1P235A(1P235B)and1P217A(1P217B)whencontrolswitchHS-18723A(HS-18723B)ismovedfrom"Auto"to"Start"position.H.No.ThesemodificationsaddnonewfunctiontotheReactorBuildingChilledWaterSystemasdescribedinFSARSections9.2.2and9.2.12.3.Thesemodificationschangeswitchinglogictopreventunnecessarytrippingoftheevaporatorwaterpumpandthecondenserwaterpump,whichimproveschillerreliability.IH.No.TheoperationoftheReactorBuildingChilledWaterSystemhasnosafetyrelatedfunction.Althoughisolatedportionsofchilledwaterpipingofthecontainmentaresafetyrelated,theseportionsarenotaffectedbythismodification.ThesemodificationsaffectcontrolswitchHS-18723A(HS-18723B)whichispartofthenon-safetyportionoftheReactorBuildingChilledWaterSystem,whichisnotaddressedintheTechnicalSpecification.

DCP90-3093A,Rev.0InstallasecondisolationvalveonElevation656'ftheTurbineBuildingbetweentherecycleisolationvalvesHV-11615AthruG,andthesluice/recycleldrainheaderoftheCondensateDemineralizerSystemtoprovideapositivemeansofisolatingthedemineralizervesselswhentheexistingbutterflyvalvesfailtoprovideadequateisolation.I.No.FSARChapter15(AccidentAnalysis)andFSARSections9.2.10(CondensateTransferandStorage)and10.4.6(CondensateCleanupSystem)havebeenreviewed.TheaccidentanalysiscontainedinChapter15areunaffectedbytheproposedmodification.Section9.2.10doesnotspecificallydiscusstheCondensateDemineralizerSystem.Section10.4.6.1statesthatthedesignbasisoftheCondensateCleanupSystemistomaintaincondensatepuritybyremovingvariouscontaminants.Thissectionalsostatesthenot-to-exceedeffluentqualityforthedemineralizers.Thedesignbasisforthesystemisnotaffectedbythe~~proposedaction.II.No.Thereisnoequipmentimportanttosafetyandnointerfacewithsafetyequipmentorsystemsassociatedwiththischange.III.No.ThismodificationdoesnotreduceanymarginofsafetydefinedinthebasisoftheTechnicalSpecifications.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thischangeaddsvalveswhicharedesignedandbuilttothesamestandardsanddesignconditionsasthecondensatedemineralizersystem.Thenewvalveswillnotinanywaydegradetheoperationofthecondensatedemineralizersystem.

ggRPgl.:91-156:DCP90-3065,Rev.0AdditionofaDataAcquisitionSystem(DAS)foreachoftheUnit2ReactorBuildingChillers2K206Aand2K206Btomonitorthechilleranditssupportsystemsonacontinuousbasis.I.No.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheadditionoftheDataAcquisitionSystemwillonlyaffectportionsoftheSWandRBCWSystemsassociatedwithchillers2K206Aand2K206B.BothasinglefailureanddoublefailureofthereactorbuildingchillersisanalyzedinFSARSection9.2.12.3.2.3.ThusthefailuremodesofthisinstallationarecoveredbythoseaccidentspreviouslyevaluatedintheFSAR.TheproposedDASaddsnonewfunctiontotheRBCWsystemasdescribedinFSARSection9.2.12.3.II.No.TheproposedmodificationwillinstallDataAcquisitionSystemsandassociatedwiringtoinstrumentswhichwillnotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchanged.ThefailuremodesofthisinstallationarecoveredbythoseaccidentspreviouslyevaluatedintheFSAR.III.No.TheRBCWSystemandtheSWSystemoperationdoesnotcontributetothemarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2and3;Theserequirementsarenotaffectedbythismodification.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.Theproposedmodificationaffectsthenon-safetyrelatedportionsoftheRBCWandSWSystems,whicharenotaddressedintheTechnicalSpecifications.

~jER~N.:91-157RRFE:DCP90-3064D,Rev.0DETPTIFExistingrootvalves(1"globevalves)willbereplacedwithnewfullport1"ballvalvesontheReactorBuildingChillerCondenserServiceWaterSensinglinestoreducethecollectionofservicewatersiltanddebrisintherootvalvesforthecondenserpumplowflowswitchinstrumentsensinglinesonUnit1chiller1K206B.RMMMARY:I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedportionsoftheRBCWSystemaretheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewrootvalveswillaffectonlyaportionoftheRBCWSystemassociatedwiththechillercondenserwatercirculatingpump.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.II.No.~~ThenewvalvesdonotaltertheintendedfunctionofthesystemandtheRBCWSystemasdescribedinFSARSection9.2.12.3.2.3.TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyinstallationofthenewrootvalves.III.No.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.Theproposed.modificationaffectsthenon-safetyrelatedportionsoftheRBCWSystem,whicharenotaddressedintheTechnicalSpecifications.

/ERIN.:91-158RREFE:DCP90-3060D,Rev.0DER?Existingrootvalves(1"globevalves)willbereplacedwithnewfullport1"ballvalvesontheReactorBuildingChillercondenserServiceWaterSensingLinestoreducethecollectionofservicewatersiltanddebrisintherootvalvesforthecondenserpumplowflowswitchinstrumentsensinglinesonUnit2chiller2K206A.SBRLRR.I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedportionsoftheRBCWSystemaretheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewrootvalveswillaffectonlyaportionoftheRBCWSystemassociatedwiththechillercondenserwatercirculatingpump.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.II.No.~~ThenewvalvesdonotaltertheintendedfunctionofthesystemandtheRBCWSystemasdescribedinFSARSection9.2.12.3.2.3TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyinstallationofthenewrootvalves.IH.No.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.Theproposedmodificationaffectsthenon-safetyrelatedportionsoftheRBCWSystem,whicharenotaddressedintheTechnicalspecifications.

DCP90-3058D,Rev.0Existingrootvalves(1"globevalves)willbereplacedwithnewfullport,l"ballvalvesontheReactorBuildingChillerCondenserServiceWaterSensingLinestoreducethecollectionofservicewatersiltanddebrisintherootvalvesforthecondenserpumplowfiowswitchinstrumentlinesonUnit1chiller1K206A.I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedportionsoftheRBCWSystemaretheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheinstallationofthenewrootvalveswillaffectonlyaportionoftheRBCWSystemassociatedwiththechillercondenserwatercirculatingpump.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.II.No.~~ThenewvalvesdonotaltertheintendedfunctionofthesystemandtheRBCWSystemasdescribedinFSARSection9.2.12.3.2.3.TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyinstallationofthenewrootvalves.III.No.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.Theproposedmodificationaffectsthenon-safetyrelatedportionsoftheRBCWSystem,whicharenotaddressedintheTechnicalSpecifications.

0

~ER~.:91-160DCP89-9057,Rev.0Installapermanentbatterycellchargingfacilityformaintainingspare24,125and250VDCClass1EbatterycellsinthefullychargedstateforimmediatereplacementofanyfailedcellsontheClass1Ebatterybanks.I.No.FSAR8.3.1,ACPowerSystem;8.3.2,DCPowerSystems;9.4.4,TurbineBuildingVentilationSystemandChapter15werereviewed.Chapter15,AccidentAnalysis,doesnotaddressthechargingofsparebatterycellsintheTurbineBuilding.TheproposedmodificationdoesnotaffectanyaccidentmitigationorinitiationasdescribedinChapter15.Themodificationdoesnotinterface,directlyorindirectly,withanyequipmentthatisimportanttosafety.II.No.Theinstallationofthesparebatterycellchargingfacilitywillbeinstalledinanon-seismicCategoryIstructure(Unit2TurbineBuilding)inanareainwhichnoClass1Eequipmentislocated.Thesparebatterycellchargingfacilityisnotrequiredtofunctionorinterfacewithanyequipmentthatisrequiredtofunctionduringandafteradesignbasisevent.TheinstallationanddesignwillbeconsistentwithacceptedPP&Lstandardsandpractices.HI.No.TheTechnicalSpecificationBaseshavebeenreviewed,specificallySection3/4.8.1.NeitherthereferencedsectionnoranyotherTechnicalBasiswasfoundtobeaffectedbytheproposedchange.Nosafetyrelatedsystemsareaffected,thustheywillcontinuetomeetsinglefailurecriteriaandtheirabilitytofunctionintheeventofaSSE,LOCA/LOOP,orotherDBA.

NL-91-025,Rev.0EvaluatetheinterimoperationoftheUnit1RBCCWSystemasacontaminatedsystemuntilthesourceofthecontaminationcanbeidentifiedandthesystemdecontaminated.I.No.Affectedsystemshavenosafetyrelatedfunctions.Performanceofthesystemisinnowayaffectedbyoperationasacontamiiiatedsystem.Ruptureofthesystemwillbecontainedandnotreleasedtotheenvironment.PertheFSAR9.2.1.3and9.2.2.3,failureofthesystem(SWandRBCCW)willnotcompromiseanysafety-relatedsystemorcomponentorpreventasafeshutdownoftheplant.II.No.III.No.Systemoperabilityisnotaffected.Systemhasnosafetyrelatedfunctions.AffectedsystemsarenotaddressedinTechSpecs.QgK~N).:91-162:DCP91-9064,Rev.0WeldadditionalbracingtotheleganglesoftheReactorBuildingClosedcoolingWater(RBCCW)HeadTank.ThiswillstrengthenandstiffenthelegsoftheRBCCWHeadTankonUnit2./galAKY:I.No.TheproposedchangetotheRBCCWHeadTank'slegsanditspipingdoesnotchangeanyoftheoriginaldesignparametersoroperationalmodesoftheRBCCWsystem.TheproposedmodificationwillhavenoinvolvementorimpactontheaccidentanalysisalreadyevaluatedinFSARChapter15.II.No.TheproposedactionwillassurethattheRBCCWHeadTankdoesnotbecomeaSafetyImpactItem,thereby,satisfyingFSARSection9.2.2.3.i.e.,"failureofthesystemwillnotcompromiseanysafetyrelatedsystemorcomponentorpreventasafeshutdownoftheplant".III.No.TheRBCCWsystemisnotaddressedintheTechnicalSpecificationsandthecoolingwatersuppliedtoothersystems(orlackofit)cannotaffectthebasisofanyTechnicalSpecification.

$ERPg).:91-163:DCP91-9063,Rev.0WeldadditionalbracingtotheleganglesoftheReactorBuildingClosedCoolingWater(RBCCW)HeadTank.ThiswillstrengthenandstiffenthelegsoftheRBCCWHeadTankonUnit1.SBQUAEI.No.TheproposedchangetotheRBCCWHeadTank'slegsanditspipingdoesnotchangeanyoftheoriginaldesignparametersoroperationalmodesoftheRBCCWsystem.TheproposedmodificationwillhavenoinvolvementorimpactontheaccidentanalysisalreadyevaluatedinFSARChapter15.II.No.TheproposedactionwillassurethattheRBCCWHeadTankdoesnotbecomeaSafetyImpactItem,thereby,satisfyingFSARSection9.2.2.3,i.e.,"failureofthesystemwillnotcompromiseanysafetyrelatedsystemorcomponentorpreventasafeshutdownoftheplant".III.No.TheRBCCWsystemisnotaddressedintheTechnicalSpecificationsandthe~~~~~~coolingwatersuppliedtoothersystems(orlackofit)cannotaffectthebasisofanyTechnicalSpecification.

/ERIN.:91-164E:DCP90-9061,Rev.oDERIHANE:InstallnewdifferentialpressurecontrolloopcomponentsintheTurbineBuildingHVACreturnair,andfilteredexhaustairsystemstobetterdetectpressurechangesandtomoreaccuratelycontrolthedamperswhichmodulatethesystemsairflowforUnit2.SGbgEARY:I.No.FSARSections9.4.4,TurbineBuildingVentilationSystem;11.5.2.1.2,TurbineBuildingandRadwasteVentExhaustSamplerandSampleRadiologicalMonitoringSystems;11.5.4.2,ProcessMonitoringandSamplingSystems,12.3.4,AreaRadiationandAirborneRadioactivityMonitoringInstrumentation;andSection15.0,AccidentAnalysis;werereviewed.FSARSection15.7,RadioactiveReleasefromSubsystemsandComponents;explicitlySection15.7.1.3,FailureofAirEjectorLines;wasreviewedforthepotentialofbeingimpactedbychangesmadeviathisproposedmodification.Theproposedmodificationdoesnotimpactthedesignbasisofthereviewedsystemsasrelatedtonuclearsafety.TheaccidentsdescribedinFSARSection15.7donotrequireanyinterventionoractionbyTurbineBuildingHVACsystemstomitigatetheconsequencesofthoseaccidents.ThismodificationdoesnotalterthisrelationshipbyaddingrequirementsnecessitatingtheTurbineBuildingHVACsystemsupportsystemsimportanttosafetyduringanaccident,III.No.TheTechnicalSpecificationBaseshavebeenreviewed,specificallySections3/4.3.7.11,RadioactiveGasesEffluentInstrumentation,and3/4.11.2,RadioactiveEffluent-GaseousEffluent.ThemodificationdoesnotaltertheabilityoftheaffectedsystemstoperformtheirintendedfunctionandsatisfytheTechnicalSpecificationBasis.

~ER~N.:91-165RREFEREEDCP90-9060,Rev.0DERIPTIInstallnewdifferentialpressurecontrolloopcomponentsintheTurbineBuildingHVAC<returnair,andfilteredexhaustairsystemstobetterdetectpressurechangesandtomoreaccuratelycontrolthedamperswhichmodulatethesystemsairflowforUnit1.KKMARY:I.No.FSARSections9.4.4,TurbineBuildingVentilationSystem;11.5.2.1.2,TurbineBuildingandRadwasteVentExhaustSamplerandSampleRadiologicalMonitoringSystems;11.5.4.2,ProcessMonitoringandSamplingSystems,12.3.4,AreaRadiationandAirborneRadioactivityMonitoringInstrumentation;andSection15.0,AccidentAnalysis;werereviewed.FSARSection15.7,RadioactiveReleasefromSubsystemsandComponents;explicitlySection15.7.1.3,FailureofAirEjectorLines;wasreviewedforthepotentialofbeingimpactedbychangesmadeviathisproposedmodification.Theproposedmodificationdoesnotimpactthedesignbasisofthereviewedsystemsasrelatedtonuclearsafety.TheaccidentsdescribedinFSARSection15.7donotrequireanyinterventionoractionbyTurbineBuildingHVACsystemstomitigatetheconsequencesofthoseaccidents.ThismodificationdoesnotalterthisrelationshipbyaddingrequirementsnecessitatingtheTurbineBuildingHVACsystemsupportsystemsimportanttosafetyduringanaccident.III.No.TheTechnicalSpecificationBaseshavebeenreviewed,specificallySections3/4.3.7.11,RadioactiveGasesEffluentInstrumentation,and3/4.11.2,RadioactiveEffluent-GaseousEffluent.ThemodificationdoesnotaltertheabilityoftheaffectedsystemstoperformtheirintendedfunctionandsatisfytheTechnicalSpecificationBasis.

DCP89-3003D,Rev.0DEIModificationstotheintakestructureinstrumentairsystem(ISIA)includingreplacementofdraintrap,prefilters,reorientationofmembranedryers,relocationoftapforairreceiverOT-086,reductionofsystemmaximumdesignpressureandmodificationofcompressordischargecheckvalvesalltoimproveperformanceofthesystem.I.No.FSARSection9.3.1.4wasreviewedinconsiderationofthisquestion.Thissectionstatesthatfailureoftheintakestructureinstrumentairsystemwillnotendangertheoperationofanysafety-relatedinstrumentsandcontrols.TheRiverWaterMake-Up(RWMU)Systemanditssupportsystems(ScreenWash,etc.)aretheonlysystemsthatrelyontheISIAsystem.FSARSections9.2,9.5and10.4werereviewedtoassurenoindirectadverseaffectstoequipmentimportanttosafetywouldbecausedbytheproposedactions.TheRWMUsystemisnotdiscussedintheFSARasconfirmedbythereviewoftheabovementionedsections.Inaddition,nosafetyrelatedequipmentreliesdirectlyupontheRWMUsystem.II.No.ThereliabilityofboththeISIAsystemandtheRWMUsystemisbeingimprovedandtherearenosystemsthatrelydirectlyontheRWMUsystem.III.No.TheISIAsystemnortheRWMUsystemarementionedinthebasisforanytechnicalspecification.Thebasisfortheservicewatersystems(ESW&RHRSW,SectionB3/4.7.1),whichuseriverwaterasmakeup,arenotaffectedbytheproposedaction.Thespraypondatitsminimumtechspeclevelhasenoughwaterforthedesignbasisaccident.

SCPJ91-1027&J91-1028,Rev.0IncreaseinthemaximumallowablesetpointoftheUnit1andUnit2TurbineBuildingHVACsupplyfilterhighdifferentialpressureswitchestoreducethefrequencyoffilterchangesandtheattendantmaintenancecosts.I.No.Thesetpointchangesrequirenophysicalchangestotheplantdesign,function,accuracy,responsetime,reliability,actuationlogicortoanyothercomponentorsystem.Thesetpointchangesalsodonotrequireanyphysicalmodificationtotheswitchesortoanyothercomponents.Thesetpointchangesareintendedtoallowgreaterpressuredifferentialsacrossthefiltersandtherebyreducethecostlymaintenancerequirementsassociatedwithfrequentfilterchanges.Calculationdeterminesthattheincreaseddifferentialhasnoadverseeffectonthefilter.II.No.Thesetpointchangesdonotaffectthedesignorfunctionofthehighdifferentialpressureswitchesorofanyothercomponents.Also,thechangesdonotcauseanycomponentorsystemtooperateoutsidetheperformanceboundariesdescribedintheFSAR.III.No.NeithertheTurbineBuildingSupplySystemsnorthehighdifferentialpressureswitchesofthesesystemsaregovernedbytheTechnicalSpecification.

SCPE911049,Rec.0AchieveabettercoordinationofinstantaneousovercurrenttripunitsofbreakerOA550downstreamofthestart-upBus10breaker¹52-10308.I.No.Theproposedactionincreasesavailabilityoftheequipmentbyinsuringthatupstreambreaker52-10308ofBus10(OA103)doesnottripforafaultonthedownstreambreakerOA550feeder.Setpointchangesoftherelaysareroutinelyperformedintheplant.Sincethereisnochangeinthedesignexceptforasetpointchange,thereisnoincreaseoftheprobabilityofoccurrenceofanaccidentevaluatedintheFSAR.II.No.TheSCPdoesnotproposeanyphysicalchangetotheplantdesignoranychangeofcircuitdesignexceptthesetpoint.Therefore,theproposedactiondoesnotcreateapossibilityforanaccidentormalfunctionofadifferenttypethanevaluatedpreviouslyintheFSAR.Therearetwomaincategoriesofequipmentaffected:Make-UpWaterSystemequipmentandDieselGenerator-Eauxiliaryloadequipment.NotechnicalspecificationsareassociatedwiththeMake-UpWaterSystem.DieselgeneratorsarecoveredbyTechnicalSpecificationSection3.8.1.1and3.8.1.2.TheproposedactiondoesnotinvolveanychangetotheDieselGeneratordesign.

ginggoal.:91-169DCP90-3093BForUnit1,installationofasecondisolationvalvejustupstreamofvalveHV-11618,"CondensateDemineralizerdrainvalvetoLRW"toprovideapositivemeansofisolatingthedrainheaderwhenthebutterflyvalvefailstoprovideadequateisolation.I.No.Section9.2.10doesnotspecificallydiscusstheCondensateDemineralizerSystemand,therefore,doesnotneedtobeaddressedinthissection.Section10.4.6.1statesthatthedesignbasisoftheCondensateCleanupSystemistomaintaincondensatepuritybyremovingvariouscontaminants.Thissectionalsostatesthenot-to-exceedeffluentqualityforthedemineralizers.Thedesignbasisforthesystemisnotaffectedbytheproposedaction.TheaccidentAnalysiscontainedinChapter15isunaffectedbytheproposedmodification.II.No.Inthismodification,thereisnoequipmentimportanttosafetyandnointerfacewithsafetyequipmentorsystems.ThismodificationmerelysuppliesredundantisolationcapabilitytothecondensatedemineralizerdrainlinetoLRW.III.No.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thischangeaddsavalvewhichisdesignedandbuilttothesamestandards,codesanddesignconditionsasthecondensatedemineralizersystem.Thenewvalvewillnotinanywaydegradetheoperationofthecondensatedemineralizersystem.

~ER~N.:91-170RREFEREE:DCP90-3064A,Rev.0DERIPTINFHAE:RemovaloftheexistingUnit1ReactorBuildingChiller"B"ventanddrainlinesandreplacethemwithventanddrainlinesdesignedtoalleviatecloggingproblems.KMMAilY:I.No.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.II.No.Afterthemodification,theRBCWSystemwillperformitsdesignbasesfunctionasdescribedinFSARSection9.2.12.3.1.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.NonewfunctionsareaddedtotheLiquidWasteManagementSystemasdescribedinFSARSection11.2.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Vnit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringReactorOperatingConditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

DCPN-3QEDA,R.0RemovaloftheexistingUnit2ReactorBuildingChiller"A"ventanddrainlineandreplacethemwithventanddrainlinesdesignedtoalleviatecloggingproblems.I.No.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.II.No.Afterthemodification,theRBCWSystemwillperformitsdesignbasesfunctionasdescribedinFSARSection9.2.12.3.1.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.NonewfunctionsareaddedtotheLiquidWasteManagementSystemasdescribedinFSARSection11.2.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringReactorOperatingConditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

~ER~N.:91-172RRRRRRRRllRNNllD:D99I83038A,R.DDERlPT1FHAE:RemovaloftheexistingUnit1ReactorBuildingChiller"A"ventanddrainlinesandreplacethemwithventanddrainlinesdesignedtoalleviatecloggingproblems.888RMARY:I.No.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.II.No.Afterthemodification,theRBCWSystemwillperformitsdesignbasesfunctionasdescribedinFSARSection9.2.12.3.1.TheproposedmodificationtotheequipmentdrainsdoesnotmodifythedesignparametersoftheEquipmentandFloorDrainageSystemasdescribedinFSARSection9.3.3.3.NonewfunctionsareaddedtotheLiquidWasteManagementSystemasdescribedinFSARSection11.2.TheRBCWSystemoperabilitydoesnotcontributetoanymarginofsafetyasdefinedinthebasisofanyTechnicalSpecification.SSESTechnicalSpecifications(Unit1)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.Section3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringReactorOperatingConditions1,2,and3.Table3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

/ERIN.:91-173RREFEE:SCPJ91-1016&1017,Rev.0DER1PTIFHE:LowerthelowalarmsetpointofpressureswitchesPSHL-17192andPSHL-27192toreducenuisancealarmsforthecharcoalabsorbertrainoutletpressure.KMhfARY:I.No.SwitchesPSHL-17192andPSHL-27192donotprovideinputtoanysafetyfunctions.Sincetheswitchesdonotprovideinputtosafetyfunctions,theFSARhasnotevaluatedtheseswitchesasdevicesthatimpacttheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofequipmentimportanttosafety.SpecificaHy,FSARchapters11.3.2and15havebeenreviewedandfoundtobeunaffected.II.No.FSARTable3.2-1classifiesthemajorcomponentsofthecondenseroff-gassystemasqualityclassD.However,switchesPSHL-17192andPSHL-27192areclassifiednon-safety.ThesetpointchangeschangethelowalarmsetpointofswitchesPSHL-17192andPSHL-27192onlyanddonotaffectanysafetyfunctions.HI.No.ThelowalarmsetpointofswitchesPSHL-17192andPSHL-27192isnot~~governedbyTechnicalSpecifications.

JERKIN.:91-174RREFBREE:DCP90-3060B,Rev.0ERlPTIInstallationofsensorsrequiredforthenewUnit2ReactorBuildingChiller"A"diagnosticsystem.$QgY:I.No.AsdiscussedinFSARSection9.2.12.3,theonlysafetyrelatedfunctionsoftheRBCWSystemareperformedbytheprimarycontainmentpipingpenetrationsandcontainmentisolationvalves.TheproposedactiondoesnotaffectsafetyrelatedportionsoftheRBCWSystem.TheadditionofthesensorswillonlyaffectportionsoftheSWandRBCWsystemsassociatedwithchiller2K206A.TheproposedmodificationaddsnonewfunctiontotheRBCWSystemasdescribedinFSARSection9.2.12.3.II.No.TheproposedmodificationwilladdsensorsrequiredforadiagnosticsystemwhichdonotaltertheintendedfunctionoftheSWsystemandtheRBCWSystemasdescribedinFSARSection9.2.1.1and9.2.12.3.ThesensorswillbedesignedandinstalledinaccordancewiththeconstructioncodesandstandardslistedinFSARSection3.TheproposedactiondoesnotaffectoperabilityoftheRBCWSystemnorintroduceanynewmodeofoperation.Thepresentoperationofthechillerisnotchangedandnonewfailuresormalfunctionsarecreatedbyadditionofthesensors.HI.No.SSESTechnicalSpecifications(Unit2)Section3.6.1.7andTable3.6.3-1andtheirbaseswerereviewedforapplicability.TechnicalSpecificationSection3.6.1.7containstherequirementsforaveragedrywelltemperaturesduringreactoroperatingconditions1,2and3.Theserequirementsarenotaffectedbythismodification.TechnicalSpecificationTable3.6.3-1includestheRBCWprimarycontainmentisolationvalves,whichwillnotbeaffectedbytheproposedmodification.

DCP89-3006B,Rev.0D1Installationofasecondisolationvalveinthefeedwaterheatertubesideventpiping.SgdgfkkR.':Thenewvalvesinterfacewiththefeedwatersystemwhichisanon-Qsystemandnotrequiredforthesafeshutdownoftheplant.FSARSection10.4.7andChapter15werereviewedforthisanalysis.Thismodificationdoesnotjeopardizethefunctionoraltertheoperationofanysafetyrelatedequipment.Thismodificationwillsignificantlyreducelcompletelyeliminateleakageoffeedwaterintotheradwastesystem,andenhancesystemavailabilitybyprovidingabackupisolationcapability.Thismodificationisnon-Qandonlyinterfaceswithnon-Qsystems.Inaddition,theinstallationanddesignwillbeinaccordancewithalloriginalcodesandstandards.Allcomponentsbeingreplacedoraddedareofsimilarphysicalcharacteristicstotheoriginalcomponentsand,therefore,anytypeofpostulatedcomponentfailurewillnotchange.III.No.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thischangeaddsandreplacesvalveswhicharedesignedandbuilttothesamestandardsanddesignconditionsasthefeedwatersystem.Thenewvalveswillnotinanywayimpacttheoperationofthefeedwatersystem.

$ER~.:91-176:NL-91-011,Rev.2ER1FuelPoolCleanoutProjecttoremoveallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7-4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.II.No.Twotypesofaccidentsarepostulated:aloadedcaskdropscenarioanddrainingofthecaskstoragepitwithasignificantinventoryofirradiatedhardwarebecominguncovered.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARsection15.7.4.IG.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.

RN.:91-177RREFE:DCP90-3075,Rev.1DRIInstallationofanultrasonicflowmonitoringsystemforbothoftheUnit1,96inchpipessupplyingcirculatingwatertotliecondenser.BVMMARY:I.No.AsdiscussedinFSARSection10.4.5,theCirculatingWaterSystemhasnosafetyrelatedfunctions.Section15.2.5oftheFSARanalyzesalossofcondenservacuumwherebythereisalossofoneormoreoftheCirculatingWaterPumps.Thismodificationwillnotincreasetheprobabilityofalossofcondenservacuum.Inaddition,anytypeofwaterleakageduetothefailureofpenetrationassemblieswouldbelessseverethanaCirculatingWaterSystemRupturediscussedinSection10.4.1oftheFSAR.II.No.Inthismodification,thereisnoequipmentimportanttosafety,andthereisnointerfacewithsafetyequipmentorsystems.Withthetransducers,pullboxes(andshields),andpipingweldedontothepipesperPP&LSpecification,andASMESectionIX,thereshouldbenoconcernwiththeultrasonicflowmonitoringsystemaffectinganothercomponentorsystem.Asanalyzed,thefailuremodesofthisinstallationarecoveredbythoseaccidentspreviouslyevaluatedintheFSAR.HI.No.ThismodificationaffectstheCirculatingWaterSystemwhichhasnosafety-relatedfunction.Inparticular,flowmeasurementofcirculatingwaterhasnodirectinterfacewithanysafetyfunctionintheplant.91-178SCPJ91-1044,Rev.0ChangeinsetpointsforTSH-17702A2andTSH-17702B2from130'Fto123Ffortemperatureswitchesassociatedwithdrywellunitcoolers1V411Aand1V411Btoilliminatenumerousfalsealarms.IUMNNRY:I.No.NoneofthedesignbasisaccidentsdiscussedinFSARsection15areaffectedbythischange.ThischangedoesnotalterthefailuremodesassociatedwitheitherTSH-17702A2&TSH-17702B2orthedrywellunitcoolers1V411A&1V411B.Theseswitchesprovidealarmstoindicateeitherfailedchilledwaterflowthroughtheunitcoolersorhighintakeairtemp.ThereareotherReactorBuildingCoolingWater/DrywellCoolersystemalarmswhichprovidethesameinformation.Further,FSARSections94.5,7.3.1.1b.8.5.6andtables9.4-8,9.4-9,9.4-)0providedetailsofDrywellCoolingSystem.Thesesectionsandtableswerereviewedforapplicability.Theproposedchangehasnoimpactonthesesectionsandtables.II.No.Thefunctionandperformanceofthedrywellunitcoolers1V411A&Bisnotaffectedbythischange.Thischangedoesnotalterthefailuremodesofthisequipmentanditdoesnotmodifyplantresponsetoadesignbasisaccident.Further,FSARSection9.4.5.1discussesthedesignbasisfordrywellcoolingsystemincludingunitcoolers1V411A&B.ThischangedoesnotalterthefunctionandtheperformanceofanyoftheabovedrywellunitcoolersanditdoesnotalterthedesignbasisdiscussedintheFSAR.Thischangewilleliminatefalsealarms.III.No.SSESTechnicalSpecificationsections3/4.6.1.7wasreviewedforapplicability.Thischangeneitherreducestheoperabilityofanyequipmentnorrequiresadditionalsurveillancetoensureplantsafety.Thischangedoesnotchangethefunctionorperformanceofdrywellunitcoolers1V411A&B.

~BRlg.:91-179~~RESCPJ9ILlOI3R*,.0Increasethesetpointofthe'instrumentfailure'unctionofFSL-17630A/B,Setpoint¹2,topreventunnecessarytripsofEmergencySwitchgearandLoadCenterRoomsCoolingSystemonhighairflow.Decreasethesetpointforthe'lowflow'unctionofFSL-17630A/B,Setpoint¹1,toreducetheinstrumentresponsetimeonsystemstart-up.BUMNARY:I.No.TherearenodesignbaseaccidentswhichspecificallyaddresstheoperationoftheEmergencySwitchgearandLoadCenterRoomCoolingSystem.However,itisdefinedasanEngineeringSafetyFeaturebytheFSAR(Section7.3.1),andthesystemisrequiredtokeep1Eequipmentwithindefinedtemperaturelimits.Thissetpointchangeincreasesthereliabilityofthesystembypreventingunnecessarytripswhenbothtrainsoffansareoperating,andduringsystemstart-upofasinglefan.ThereliabilityoftheControlStructureventilationsystemsisenhancedbytheincreasedreliabilityoftheEmergencySwitchgearandLoadCenterRoomCoolingSystem.Thissetpointchangedoesnot'affectthedesignoroperationoftheEmergencySwitchgearandLoadCenterRoomCoolingSystemoranyoftheControlStructureHabitabilitySystems.Thischangeincreasessystemreliabilitybyeliminatingthepossibilityofunnecessarytripsduringtwofanoperationandsystemstart-upofasinglefan.Thereisnobasisforthevalueofthe'lowflow'riportheexistenceofahighflowtripinthissystem.Therefore,decreasingthe'lowflow'etpointandredefiningtwoofthetripsasaninstrumentsupervisorytripdoesnotimpactanysafetyfunctionIII.No.ThecontrolRoomEmergencyOutsideAirSystemistheonlyControlStructureHabitabilitySystemaddressedbytheTechnicalSpecifications.ItisnotaffectedbytheoperationoftheEmergencySwitchgearandLoadCenterRoomCoolingSystemortheControlStructureChillers.TheoperationandinstrumentationoftheEmergencySwitchgearandLoadCenterRoomCoolingSystemisnotaddressedspecificallyintheTechnicalSpecifications.ThischangeincreasesthereliabilityoftheEmergencySwitchgearandLoadCenterRoomCoolingSystemandthereforeControlStructureChillersduringemergencyoperation.

0

/ERIN.:91-180RREFERENE:DCP91-3023B,Rev.0DERlPTIFHANE:Replaceexistingtarget-typeflowmeterinUnit2CoolingTowerBlowdownFlowInstrumentationwithanelectromagneticflowmeterforimprovedreliability.RRMMARY:I.No.RadioactiveReleasesfromSubsystemsandComponentsandI.iquidRadwasteSystemAccidentsareaddressedinSection15.7andSection15.7.2,respectively,oftheFSAR.EngineeredSafetyFeaturesareaddressedinChapter6oftheFSAR.CirculatingWaterSystemandRiverWaterMakeupSystemareaddressedinSection10.4.5oftheFSAR.LiquidWasteManagementSystemisaddressedinSection11.2oftheFSAR.Noneofthereferencedsystemswillbeimpactedbytheproposedmodification.II.No.Thismodificationonlyreplacestheexistingtarget-typeflowelementandtransmitterwithanewelectromagneticflowelementandtransmittertoupgradetheperformanceofanon-safetyrelatedinstrumentloop.Thenewinstrumentationwillperformallthesamefunctionsastheexistinginstrumentation.Nonewfunctionsorinterfaceswithotherdevicesorsystemswillbeintroduced.Theupgradednon-safetyrelatedinstrumentloopwillcontinuetoprovidethe5000gprnminimumblowdownflowinterlockthatisapermissiveforradwastedischarge.InstrumentloopfailureisnotspecificallyaddressedintheFSAR;however,afailureoftheupgradedloopwillhavethesameeffectasthatoftheexistingloop.III.No.Radiologicalreleasesarediscussedinsections3.3.7.10,4.3.7.10,and3.11.1.1ofthePlantTechnicalSpecifications,whichprovidesthebasesandlimitingconditionsforoperationforliquideffluentreleasesandassociatedinstrumentation.Theupgradedinstrumentloopaccuracyisequivalenttotheexistinginstrumentloopaccuracy;therefore,theupgradedloopwillcontinuetouse5000gpmfortheminimumblowdownflowpermissivetoensureminimumdilutionflowisavailablepriortoallowingradwasteeffluentdischargevalvestobeopened.TheupgradedloopwillensurethattheminimumrequirementsforcoolingtowerblowdowndilutionflowascontainedintheODCMaremaintained.

/ERIN.:91-181R:DCP91-3023A,Rev.0DEReplaceexistingtarget-typeflowmeterinUnit1CoolingTowerBlowdownFlowInstrumentationwithanelectromagneticflowmeterforimprovedreliability.SgdgEARY:I.No.RadioactiveReleasesfromSubsystemsandComponentsandLiquidRadwasteSystemAccidentsareaddressedinSection15.7andSection15.7.2,respectively,oftheFSAR.EngineeredSafetyFeaturesareaddressedinChapter6oftheFSAR.CirculatingWaterSystemandRiverWaterMakeupSystemareaddressedinSection10.4.5oftheFSAR.LiquidWasteManagementSystemisaddressedinSection11.2oftheFSAR.Noneofthereferencedsystemswillbeimpactedbytheproposedmodification.II.No.Thismodificationonlyreplacestheexistingtarget-typeflowelementandtransmitterwithanewelectromagneticflowelementandtransmittertoupgradetheperformanceofanon-safetyrelatedinstrumentloop.Thenewinstrumentationwillperformallthesamefunctionsastheexistinginstrumentation.Nonewfunctionsorinterfaceswithotherdevicesorsystemswillbeintroduced.Theupgradednon-safetyrelatedinstrumentloopwill.continuetoprovidethe5000gpmminimumblowdownflowinterlockthatisapermissiveforradwastedischarge.Instrumentloopfailureisnotspecifically-addressedintheFSAR;however,afailureoftheupgradedloopwillhavethesameeffectasthatoftheexistingloop.III.No.Radiologicalreleasesarediscussedinsections3.3.7.10,4.3.7.10,and3.11.1.1ofthePlantTechnicalSpecifications,whichprovidesthebasesandlimitingconditionsforoperationfprliquideffluentreleasesandassociatedinstrumentation.Theupgradedinstrumentloopaccuracyisequivalenttotheexistinginstrumentloopaccuracy;therefore,theupgradedloopwillcontinuetouse5000gpmfortheminimumblowdownflowpermissivetoensureminimumdilutionflowisavailablepriortoallowingradwasteeffluentdischargevalvestobeopened.TheupgradedloopwillensurethattheminimumrequirementsforcoolingtowerblowdowndilutionflowascontainedintheODCMaremaintained.

/ERIN.:91-182~~DCP90-9040,Rev.0ERIToisolatetheflowswitchfromthepumpcontrolcircuitintheeventofafire,thischangeprovidesaseparatefusefortheflowswitchcomponentsineachControlStructureChilledWatercirculatingpumpcontrolcircuit.Y:I.No.ThismodificationdoesnotincreasetheprobabilityofoccurrenceortheconsequencesoftheaccidentsdescribedinFSARChapters6and15.FSARSection9.2.12.1.2.3statesthatoneofthetwochilledwatertrainswillbeinoperationduringallmodesofplantoperationincludingLOCA.Undernormalconditions,onechilledwatertrainwillbeoperatingandtheothertrainwillbeonstandby.Failureinthenewcircuit(e.g.blownfuseinflowswitchcircuit)willonlydisablethelowchilledwaterflowautomaticstartofthatloopalongwithsendinganalarmtoinformoperatorsofcircuitfailure.Manualstartcapabilityofthechilledwaterpumpwillbeunaffected.II.No.FSARSections9.4.2.2.2and9.2.12.1.3implythattheControlStructureChilledWaterSystemissinglefailureproof;however,afireinducedfailureinvolvingtheexistingOP162A/BcontrolcircuitrymaycauseacompletelossoftheChilledWaterSystem.TheControlStructureChilledWaterSystemwillbeplacedinitsdesignbasisconfigurationbytheproposedactionandwillprecludethepossibilityofthesinglefailuredescribedabove.III.No.TheControlStructureChilledWaterSystemisnotmentionedinthebasesforanyTechnicalSpecifications.Tech.Spec.Basis3/4.8.1,3/4.8.2,and3/4.8.3,"A.C.Sources,D.C.Sourcesandonsitepowerdistribution"-"TheoperabilityoftheA.C.andD.C.powersourcesandassociateddistributionsystemsduringoperationensuresthatsufficientpowerwillbeavailablefor(1)thesafeshutdownofthefacilityand(2)themitigationandcontrolofaccidentconditionswithinthefacility."TheproposedactioneliminatesasinglefailureandthusimprovesthereliabilityoftheroomcoolingsystemfortheA.C.powersources.Thiswillreducethepossibilityofmalfunctionstothisequipment.

ERN.:91-183:DCP91-3005,Rev.0InstallationofadoublebaypanelinthecontrolroomtohousetheelectronicdrawersfortheReactorRecirculationPumpVibrationMonitoringSystemforUnit1and2.Also,theSPINGinsertisremovedfrompanelOC669andputinthesecondbayofthenewdoublebaypanel.I.No.TheReactorRecirculationPumpVibrationMonitoringSystemisNon-Q,Non-Class1Eanddoesnotperformanycontrolfunctions.Thismodificationsimplyremovesthecomponentsfromatemporarypanelandinstallstheminapermanentcontrolroompanel.TheReactorRecirculationPumpVibrationMonitoringSystemisnotusedinanyFSARChapter6or15accidentanalysis.Anycredibleelectricalfailureofthesystemwouldnotaffectanysafetysystemortheabilityofthesafetysystemtoperformitssafetyfunctions.TheVentStackRadiationMonitoringSystemisalsoNon-Q,non-Class1Eanddoesnotperformanycontrolfunctions.ThismodificationremovesthecomponentsfromtheSPINGconsoleandinstallstheminthesecondbayofthenew,permanentcontrolroompanel.ThismodificationdoesnotalterthecapabilityoftheradiationmonitoringsystemtoperformasfunctionallydescribedintheFSAR.II.No.Thismodificationremovestheequipmentfortwoexistingsystems(VentStackRadiationMonitoringSystemandReactorRecirculationPumpVibrationMonitoringSystem)fromtheirseparatecontrolpanelsandinstallstheminasingle,doublebay,controlpanel.Thefunctionaldesignandoperationofthetwosystemsremainunchangedsinceallequipmentexcepttheenclosuresfortheequipmentarereusedforthismodification.Thefailuremodesafterthismodificationremainthesameasthatforthesamesystemsbeforethemodificationandwouldinnowayaffectanysafetyrelatedsystemsorcomponents.IH.No.AreviewoftheapplicableportionsoftheTechnicalSpecification,Sections3/4.3.7.11and3/4.11.2.1indicatesthattheintentoftheVentStackRadiationMonitoringSystemistoensurecompliancewiththeguidelinesof10CFRPart20.InthatthismodificationneitherimprovesnoraffectsthecapabilityoftheVentStackRadiationMonitoringSystemtoperformitsfunction,themodificationdoesnotchangethemarginofsafety.TheReactorRecirculationPumpVibrationMonitoringSystemisnotaddressedintheTechnicalSpecifications.Thesystemperformsnosafetyfunctionsandisisolatedfromequipmentwhichperformsafetyrelatedfunctions.

~ER~.:91-184RRE:DCP89-3027&3028,Rev.0DRTReplacementofexisting3"butterflyand2"globevalvesonRCIC,HPCI,CSandRHRcoolingcoilsupplylinesandRCIC,HPCIandCScoolingcoilreturnlineswithstainlesssteelballvalvestoimprovemaintainability.Also,installationofnewstainlesssteelfloworificeandspoolpiecestoprovidemoreaccuratelongtermflowmeasurements.SgdfMARYI.No.ThedesignbasisfortheESWSystemisdiscussedinChapter9,Section9.2.5oftheFSAR.AnevaluationofcomponentsinthesystemaffectedbythismodificationshowsthattheESWSystemdesignbasiswillnotchangeasaresultofthesemodifications.Thismodificationisrequiredtosimplyupgradetheexistingcoolingcoilisolation/throttlevalves,interconnectingpipeandflowelementsforincreasedreliabilityandmaintainabilityofthisequipment.ThismodificationwillprovidegreaterassurancethattheESWSystemisperformingitsdesignfunctionbyincreasingthereliability/accuracyofflowmeasurementsatthecoolingcoils.Theupgradingofisolationvalvesandreplacementoffloworifices/spoolpieceswithupgradedmaterialsdoesnotcreateapossibilityforanaccidentormalfunctionofadifferenttypethananypreviouslyevaluatedinChapter15oftheFSAR.TheESWSystemdesignbasis'illnotchangeasaresultofthismodification.III,No.TheonlytechnicalspecificationpotentiallyaffectedbythismodificationwouldbeSection3/4.7.1paragraph3.7.1.2,becausethatsectiondealswithoperabilityofESWsystemandthismodificationwillreplacevalvesandflowelementsthatareusedduringESWoperation.Thedifferenceinpressuredropduetothenewballvalveswasevaluatedagainstthevalvesassumedinthedesigncalculationsanditwasfoundinsignificant.Therefore,thesystemperformanceandcalculationsimportanttosafetywillnotbeaffectedbythesechanges.

/ERIN.:91-185RREFEREE:DCP91-3011,Rev.0DERIPTIAReplacementofexistingunderratedfusesinthenon-class1Ebatterychargers'elayenclosure,motorcontrolcenters,anduninterruptiblepowersupplieswithinthe250VDCsystem.RQMMARY:I.No.Thefunctionoftheconnectedloadsystemsarenotmodifiedbythisaction.Additionally,thefailuremodeandeffectanalysisprovidedinFSARTable8.3-22forthe250VDCSystemisnotimpactedbythischange.Thereplacementfusesandfuseblocksarespecifiedtothesamecriteriaastheexistingequipmentwiththeexceptionthattheyaretestedtoaminimumof300VDCand20,000ampsinterruptingcapacityinordertoassureinterruptionoffaultedand/oroverloadedcircuitsandpreventfurtherpropagationofthefailures,II.No.InstallationofthesereplacementfusesandfuseblocksdoesnotalterthefunctionorloadsoftheNon-Class1EloadsconnectedtotheClass1Ebusses.Thismodificationdoesnotgenerateanyadverseeffectsontheloadssuppliedbysafetysystems.TheproposedmodificationwillnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-22.III.No.Thismodificationisimplementedtodecreasethechallengeontheupstreaminterruptingdevicebyincreasingtheassurancethatthelocalequipmentfuseswillperformtheirdesignfunctionduringequipmentfaultsand/oroverloads.ThislimitstotheextentpracticaltheeffectofNon-Class1EequipmentfaultsandoverloadsontheClass1E250VDCsystem.Therefore,theproposedactiondoesnotreducethemarginofsafetyasdefinedinthebasisforanyTechnicalSpecification.

/ERIN.:91-186RRE:DCP90-3093C,Rev.0DERIPTIFHAE:Thismodificationinstallsamanual3"ballvalveinthecommon3"headerbetweenthe20"CondensateEffluentHeaderandtheFeedwaterPumpSealWaterSystem.Theadditionofthe3"ballvalvewillreducemaintenancetimebyprovidingpositiveisolationforrepairofthesealwatersystemcomponentsandeliminatetherequirementforcostlyfreezeseals.SBMLL'.No.FSARChapter15(AccidentAnalysis)andFSARSection10.4.7(CondensateandFeedwater)hav'ebeenreviewed.TheAccidentAnalysescontainedinChapter15areunaffectedbytheproposedmodification.Thenewvalve,locatedintheTurbineBuilding,elevation676,'nterfaceswiththefeedwaterpumpsealwatersystemwhichisanon-Qsystemandnotrequiredforthesafeshutdownoftheplant.Thismodificationdoesnotjeopardizethefunctionoraltertheoperationofanysafetyrelatedequipmentorincreasetheradiologicalconsequencesofadesignbasisaccident.Thismodificationwillsignificantlyimprovethesealwaterisolationcapabilitywithoutanyadverseimpactonreactorfeedpumpdesignorfunction.II.No.Theinstallationanddesignwillbeinaccordancewithalloriginalcodesandstandards.Allcomponentsbeingreplacedoraddedareofsimilarphysicalcharacteristicstotheoriginalcomponentsand,therefore,anytypeofpostulatedcomponentfailurewillnotchange.III.No.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thischangeaddsavalvewhichisdesignedandbuilttothesamestandards,codesanddesignconditionsasthecondensatesystem.Thenewvalvewillnotinanywaydegradetheoperationofthecondensatesystem,ormorespecifically,theReactorFeedPumpSealWaterSystem.

RREFEREE:DCP89-3006C,Rev.0DERIPTIFHE:InstallationofasecondisolationvalveupstreamoftheexistingventordrainlineisolationvalveintheUnit1feedwaterheatershellsideventanddrainpipingtofacilitatemaintenanceandpreventleak-by.SVMfAllYI.No.Thenewvalves,locatedintheTurbineBuildingbetweenelevations656'nd699',interfacewiththefeedwatersystemwhichisanon-Qsystemandnotrequiredforthesafeshutdownoftheplant.FSARSection10.4.7,10.4.10andChapter15werereviewedforthisanalysis.Thismodificationdoesnotjeopardizethefunctionoraltertheoperationofanysafetyrelatedequipment.Thismodificationwillsignificantlyreduce/completelyeliminateleakageoffeedwaterintotheradwastesystem,andenhancesystemavailabilitybyprovidingabackupisolationcapability.H.No.~~Thismodificationisnon-Qandonlyinterfaceswithnon-Qsystems.Inaddition,theinstallationanddesignwillbeinaccordancewithalloriginalcodesandstandards.Allcomponentsbeingreplacedoraddedareofsimilarphysicalcharacteristicstotheoriginalcomponentsand,therefore,anytypeofpostulatedcomponentfailurewillnotchange.III.No.ThismodificationdoesnotreduceanymarginofsafetydefinedintheBasisoftheTechnicalSpecifications.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thischangeaddsvalveswhicharedesignedandbuilttothesamestandardsanddesignconditionsasthefeedwaterheaterdrainandventsystem.Thenewvalveswillnotinanywaychangetheoperationofthefeedwaterheaterdrainandventsystem.

RREFERE:NL-91-026,Rev.0RIPTIProvidenewboundingconditionsforeithertheformerorfutureMobileProcessingSystemFacilitydecontaminationsystemsuppliedbyPlymouthDiversifiedServices.SlgMARYI.No.ThelocationoftheMobileProcessingSystemFacilityoutsidetheplantbuildings,i.e.intheenvironment,doesnothaveadirectaffectonthepotentialaccidentsasevaluatedinFSARChapter15.NuclearSafetyOperationalAnalysis(NSOA)inFSARSection15A.6.2.3.1.RadioactiveMaterialReleaseControl,describes.thesignificanceofpreventingexcessivereleaseofradioactivematerialstotheenvironment.Safetyactionrequiredisamonitoringsystemtoensurelimitsgivenin10CFR20and10CFR50arenotexceeded.II.No.TheMobileProcessingSystemFacilityisnotphysicallyconnectedtotheplant.Thisfacilitywillbeusedtoprocessliquidoilywasteorpetroleumbasedmaterials.AnaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheSARincludeafirewhichconsumestotalliquidinventoryoffacility,releasingactivitytotheair.Wasteoiltrailerfireoffsitedoseanalysisandconcentrationlimits,showsthatatamaximumactivitylimitof1.05E3p,Ci,TechnicalSpecification3.11.2.1.blimitof1500mrem/yr,isnotexceeded.III.No.BasesforTechnicalSpecification3/4.7.2ensuresthatControlRoompersonnelwillnotexceed5remwholebodyinaccordancewith1OCFR50,AppendixA,Criteria9.Unrestrictedareasandmembersofthepublicareprotectedfromconcentrationsofgaseouseffluentsexceeding10CFR20,AppendixB,Table11,Column1.Memberofthepublicdoseiskept"aslowasreasonablyachievable"(ALARA)atsiteboundaryinaccordancewith10CFR20and10CFR50AppendixI.Limitstominimizedoseratefromgaseouseffluentsshallbeincludedinprocedures.MobileProcessingSystemFacilitytotalactivityislimitedtolmCi.LiquidoilywasteorPetroleumbasedmaterialscontainingnoblegasses(i.e.KrXe)andI-131asdeterminedbyisotopicanalysiswillnotbeprocessed.Facilityfiredetectionandprotectionshallbeavailablepriortoandduringprocessing.

~Eel.:91-189:NL90-029,Rev.1ReviewofproposeduseoftheTemporaryLaundryFacilitythatwillbeusedtosort,store,shipandreceiveprotectiveclothing.I.No.TheTemporaryLaundryFacilityisastandalone,temporaryfacility.Thefacilityhasnosafety-relatedfunctions,andthefacilitydoesnotinterfacewithanysafety-relatedsystems.Thelaundrytrailersdonotplayacriticalroleinplantoperations.II.No.AccidentanalysesintheFSARarenotperformedforscenariosinvolving,theprocessingofcontaminatedprotectiveclothing.However,FSAR15.7containsanalysisonRadioactiveReleasefromSubsystemsandComponents.AworstcaseaccidentscenariofortheTemporaryLaundryFacilitycouldresultinradioactivereleaseofupto36.4millicuries(assumingallactivityisCO-60).Adoseevaluationindicatesamaximumdoseatthesiteboundaryof372milliremforareleaseof36.4millicuries.ThisdosedoesnotrequireachangetotheFSAR.III.No.TheFacilityisatemporarystand-alonelaundryprocessingarea.ThefacilitydoesnotinterferewithanyothersystemorcomponentgovernedbytheTechnicalspecifications.

~ER~.:91-190RREFERENE:NL-91-026,Rev.1DERIPTINFE:ProvidenewboundingconditionsforeithertheformerorfutureMobileProcessingSystemFacilitydecontaminationsystemsuppliedbyPlymouthDiversifiedServices.ltLMMARY:I.No.ThelocationoftheMobileProcessingSystemFacilityoutsidetheplantbuildings,i.e.intheenvironment,doesnothaveadirectaffectonthepotentialaccidentsasevaluatedinFSARChapter15.NuclearSafetyOperationalAnalysis(NSOA)inFSARSection15A.6.2.3.1.RadioactiveMaterialReleaseControl,describesthesignificanceofpreventingexcessivereleaseofradioactivematerialstotheenvironment.Facilityatmosphereandprocessvesselventsystemwillbesampledandanalyzedtodetermineifreleaselimitswereexceeded.H.No.TheMobileProcessingSystemFacilityisnotphysicallyconnectedtotheplant.Thisfacilitywillbeusedtoprocessliquidoilywasteorpetroleumbasedmaterials.AnaccidentormalfunctionofadifferenttypethananyevaluatedpreviouslyintheSARincludeaFirewhichconsumestotalliquidinventoryoffacility,releasingactivitytotheair.Wasteoiltrailerfireoffsitedoseanalysisandconcentrationlimits,showsthatatamaximumactivitylimitof1.05E3pCi,TechnicalSpecification3.11.2.1.blimitof1500mrem/yr.isnotexceeded.III.No.BasesforTechnicalSpecification3/4.7.2ensuresthatControlRoompersonnelwillnotexceed5remwholebodyinaccordancewith1OCFR50,AppendixA,Criteria9.Unrestrictedareasandmembersofthepublicareprotectedfromconcentrationsofgaseouseffluentsexceeding10CFR20,AppendixB,Table11,Column1.Memberofthepublicdoseiskept"aslowasreasonablyachievable"(ALARA)atsiteboundaryinaccordancewith10CFR20and10CFR50AppendixI.Limitstominimizedoseratefromgaseouseffluentsshallbeincludedinprocedures.MobileProcessingSystemFacilitytotalactivityislimitedtolmCi.LiquidoilywasteorPetroleumbasedmaterialscontainingnoblegasses(i.e.Kr,Xe)andI-131asdeterminedbyisotopicanalysiswillnotbeprocessed.Facilityfiredetectionandprotectionshallbeavailablepriortoandduringprocessing.

h/ERIN.:91-191RREFERENE:SCPJ-91-1046DER?PTINFHANE:DecreasethesetpointoftheUnit1CondensatePumpRoomHighTemperatureTSH-17442topreventinstrumentinaccuraciesfromcausingthetemperatureofthecontrolledspacetobeexceededandtoavoidnuisancealarms.SEMLAIIF:I.No.Thetemperatureswitch,theCondensatePumpRoomCoolingSystem(CPRCS)andtheCondensateSystemareconsideredasnotimportanttosafetyasevaluatedinFSARSections9.4.4.2,9.4.4.3,10.4.7.1.ThereducedtemperatureswitchsetpointcausescoolingequipmenttobeginoperationattemperatureswellbelowthemaximumallowablelimitidentifiedintheFSAR.Theroomtemperaturemaybemonitoredtopreventthemaximumallowablelimitfrombeingexceeded.Astimepermits,faultycoolingequipmentwouldberepairedandthefourthunitreturnedtostandby.Thechangedoesnotaffectthedesignfunction,accuracy,reliability,responsetimeoractuationlogicoftheswitchoranyothercomponentorsystem.Thesetpointchangealsodoesnotrequireanyphysicalmodification'totheswitchorothercomponents.Thelowertemperaturesenhanceratherthandegrade,systemperformance.II.No.Thesetpointchangedoesnotaffectthedesignorfunctionoftheswitchoranyothercomponentorsystem.Also,thechangedoesnotcauseanycomponentorsystemtooperateoutsidetheperformanceboundariesdescribedintheFSARorTechnicalSpecifications.III.No.Thetemperatureswitch,theCPRCSandtheCondensateSystemarenotsafety-related.Furthermore,theCondensatePumpRoomTemperatureHighSetpointisnotgovernedbyTechnicalSpecifications.

/ERIN.:91-192:DCP90-3029RemovalofValveBodyDrainlineforReactorRecirculationPumpSuctionValvetoeliminatethepotentialfordrainvalveleakageandeliminatethepossibilityoffatiguefailureatthedrainnozzleconnectionforUnit1.~f~gY:I.No.TheapplicabledesignbasisaccidentintheFSARwhichwasreviewedforpotentialimpactbythischangeisdescribedinFSARSection15.6,DecreaseinReactorCoolantInventory".ThespecificevaluationisdescribedinFSARSection15.6.5,"Loss-of-CoolantAccidents(ResultingfromspectrumofpostulatedPipingBreakswithintheReactorCoolantPressureBoundary)-InsideContainment".Thischangewillnotincreasetheprobabilityofoccurrenceofanaccidentsinceallstandardsofdesign,materialandconstruction,namelytheASMEBoilerandPressureVesselCode,SectionIII,ClassI,willbemaintainedforthemodifiedpiping.II.No.Thechangedoesnotintroduceanynewmodesoffailurefortheaffectedsystem,~~nordoesitimpactthesysteminsuchamannerthattheprobabilityofanytypeofaccidentwouldbeincreased.III.No.TheTech.Spec.limitwhichisapplicable,tothissystemwithrespecttothischangeisdescribedinTech.Spec.Section3/4.4.8"StructuralIntegrity".ThesurveillancerequirementforverifyingthestructuraladequacyofthereactorcoolantsystemasdescribedinFSARSection5.2.4andTech.Spec.4.0.5istheperiodicinspectionandpressuretestingofthepressureretainingcomponentsofthereactorcoolantpressureboundary,inaccordancewiththerequirementsofSectionXIoftheASMEBoilerandPressureVesselCodeand10CFR50.ThischangedoesnotaffectthebasesfortheTech.Spec.limitsorprogrammaticrequirementsidentified.

~ER~N).:91-193RREFERENENL91-027,Rev.0DERIPTIFPANE:TesttoattempttounplugtheLiquidRadwasteCollectionTank(LRWCT)eductorstounblockthem.fQMilARY:I.No.FSARsection11.2wasreviewedagainsttheproposedtest.Thissectiondelineatesallsafetymechanismsavailabletotheliquidradwastesystem.Itstatesthecollectionsystemhasnonuclearsafetyrelatedfunctionasadesignbasis.II.No.FSARsection15.7.3,PostulatedRadioactiveReleaseDuetoLiquidRadwasteTankFailure,providesabasisforthereleaseofinventoryofhighactivityConcentratesWasteTank,ultimatelycausingairbornereleasethroughtheplantvent.Failureofanyequipmentwouldhavenoeffectonasafetyrelatedsystem.AspillisboundedbytheConcentratesTankscenario.III.No.~~TechnicalSpecification3.11.1.3providesbasisandLCOsfortheLRWsystem.Theoperationofcollectiontankrecirculationflowpathsisnotalteredbythistest.Theonlychangetothesystemistoremoveafloworificeinanattempttounblocktankeductors.

@ERIN.:91-194RRE:NL-91-011,Rev.3Removalofallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7.4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.II.No.Irradiatedhardwarewillbeloadedandtransportedincaskssimilartospentfuelcasks.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARSection15.7.4.IH.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.ThefollowingTechnicalSpecificationswerereviewed:3/4.3.2,3/4.3.7,3/4.9.6,3/4.9.7,3/4.9.9,3/4.11.3,3/4.11.4,5.6.2,6.9.1.8and6.13.

DCP91-3024,Rev.0ProvideconnectionfromtheTrainingCenteradditiontoDomesticWater,SanitaryDrainageandFireProtection.Ilggf44ZI.No.Section9.2.11oftheFSARdealsspecificallywithPotableWaterandSanitaryWasteSystems,andsection9.5.11dealswithFireProtectionSystem.Nofunctionalchangestoanysystemswillbemadebythismodification.Theexistingsystemswillbecapableofprovidingtherequiredservicestothenewfacilitywithnoadverseaffectstootherconnectedsitefacilities.II.No.Theconnectionsareallperformedonnon-safetyrelatedsystemslocatedoutsidetheplantsecurityfence.NofeatureofthedesignoftheproposedmodificationorlocationsforinstallationcreateanymechanismthatwouldcreatethepossibilityofanaccidentormalfunctionofadifferenttypethanpreviouslyanalyzedintheFSAR.ITheTechnicalSpecificationshavebeenreviewedandtheDomesticWaterandtheSanitaryDrainagearenotspecificallyaddressed.Section3/4.7.6providesthebasisfortheTechnicalSpecificationontheFireSuppressionSystem.Thismodificationisonlytotieintoanduseexistingsystemstoservicethenewfacility.Nofunctionalchangestoanysystemswillbemadebythismodification.Theexistingsystemswillbecapableofprovidingtherequiredservicestothenewfacilitywithnoadverseaffectstootherconnectedsitefacilities.

DCP90-3034G,Rev.1DERIE:ReplaceCondensateDemineralizerVesselUnderdrainSystemonUnit2.R:I.No.TheaccidentanalysesaddressedinChapter15arenotaffectedbytheproposedaction.FSARSection9.2.10providesnodiscussiononthecondensatedemineralizersystem,andthereforedoesnotneedtobeaddressedinthissection.ThisdesignbasisoftheCondensateCleanupSystem(asdescribedinSection10.4.6.1)istomaintainthecondensateattherequiredpuritybyremovingvariouscontainments.Thissectionalsostatesthenot-to-exceedeffluentqualityforthedemineralizers.Thedesignbasisofthesystemisnotaffectedbytheproposedaction.SectionSection10.4.6.3identifiesthepresenceofaneffluentstrainerattheoutletofeachvesseltopreventamassivedischargeofresinsintheeventofanunderdrainfailure.Thestrainersarenotbeingaffectedbytheproposedactionandthereforewillstillbeavailabletomitigatethistypeofmalfunction.II.No.~~AmalfunctionnotdiscussedinFSARChapter15orsection10.4.6iswhereionicallyexhaustedresin,alsocontainingalargeamountofcrud,remainsinthevesselafterresintransfer,causingpoorqualityfeedwater.Thistypeofmalfunctionoccursoccasionallyandiscaused,inpart,bypoorflowdistributionthroughtheunderdrainlaterals.Theproposedactionwillimproveflowdistributionthroughtheunderdrains,thusdecreasingthelikelihoodofoccurrenceofthistypeofmalfunction.AnadditionalmalfunctionnotpreviouslyevaluatedintheFSARisasightglassfailurewhichcouldcausepersonnelinjuryand/oraradioactivespillincident.Installingthesiteglassescreatesapossibilityofthistypeofmalfunction;however,thepossibilityisextremelyremotesincethesightglasschosenhasadesignpressureof750psig.III.No.TechSpecBasis3/4.4.4statesthatwaterchemistrylimitsareestablishedtopreventdamagetothereactormaterialsincontactwithreactorcoolant.Thisbasisidentifiesthatconductivitymeasurementsarerequiredcontinuouslysincechangesinthisparameterareanindicationofanabnormalcondition.Theconductivitymonitoringequipmentwillnotbeaffectedbytheproposedaction.

JERE.:91-197RE:DCPJ91-1050,Rev.0Establishthelowlevelalarmsetpointfortheliquidradwastecollectiontanks,samplestanksandsurgetanksatapproximately2%tankleveltoreducethepotentialforspuriousalarmsduringnormaloperationandtoprovideconsistencyinthesetpointsofthevarioustanks.I.No.FSARSection15.7.3providesananalysisofaliquidradwastetankfailuretoshowcompliancewithoff-sitedosecriteriaThetankcontainingthelargestquantitiesofsignificantradionuclidesintheliquidradwastesystemisassumedtofail.Nocreditistakenforoperatoractionorautomaticactions.Thissetpointchangedoesnotaffectanyassumptionsusedinthisaccidentanalysis.II.No.Thisproposedchangetothelowlevelalarmsetpointforthesubjectradwastetanksaffectsanonsafety-relatedmonitoringfunctiononly.Thepossibilityforanaccidentormalfunctionofadifferenttypethananypreviouslyevaluatedisnotcreatedbythischange.TheonlyTechnicalSpecificationconsideredapplicabletothischangeisTS3/4.11.1.3,whichrequirestheliquidradwastetreatmentsystemtobeoperableinordertoreducetheamountofradioactivematerialsinliquidwastepriortodischarge.Thisproposedchangewillimproveoperationofthesystembyeliminatingnuisancealarms.

DCP90-3094,Rev.0InstallationofflangesoneachsideofContromaticscheckvalves141F024A,B,CandDinsidecontainmenttofacilitatemaintenanceofthecheckvalvesinUnit1.I.No.ThischangewillnotincreasetheprobabilityofoccurrenceofanaccidentsinceaHstandardsofdesign,materialandconstructionwillbemetfortheequipmentbeingmodified.Furthermore,thismodificationdoesnotchangeoverallperformanceofanysystem.Thischangewillnotincreasetheprobabilityofamalfunctionofequipmentimportanttosafetysincenonewfailuremodeswillbeintroducedbythismodification.Thismodificationonlyinstallsflangesinexistingpipinginordertofacilitatethemaintenanceofsafetyrelatedcheckvalves.ThepipingincludingthenewflangeswillremaininconformancewiththeloadingcombinationsspecifiedinFSARTable3.9-17asoriginallydesigned.H.No.Thismodificationdoesnotalterthefunction,changetheoperationorintroduce~~~~~~newfailuremodesfortheContainmentInstrumentGasSystem,theMSIVsoranyothersafetyrelatedcomponents.III.No.TherearenorequirementsfortheContainmentInstrumentGasSystemintheTechnicalSpecifications.ThismodificationdoesnotalterthebasisforthetechnicalspecificationfortheMSIVs(3/4.4.7)oranyothersafetyrelatedsystems.

$gRgg7.:91-199RREPE:DCP90-3035E,Rev.0AdditionofaRWCUpumphandlingsystemtoremovethemotorsubassemblyfromthemountinglocationandtransportingittothemaintenanceshopforworkasrequired.$Q@g4RY:I.No.ThedesignbasesfortheReactorBuildingstructurewerereviewedinFSARsection3.8.4.2andSSESSafetyEvaluationReport(NUREG07761section3.8.2.NUREG0776Supplements2and6,section9.4.1discussHeavyLoadreviewsandapprovesPP&Lprogramforheavyloadreviews.TheloaddropanalysisconcludedthattheconsequencesofthedropdonotresultinthelossofthesafetyfunctionofReactorBuilding.H.No.IILNo.TheRWCUhandlingsystemallowsforremovalofoneRWCUpumpwhiletheRWCUsystemispressurized.Thedroppingofthemotorsubassemblydoesnotintroduceanynewfailures,orfailuremodes,nordoesiteffectthesafetyfunctionofReactorBuildingstructure.TechnicalSpecificationsections3.3.2,4.3.2.1,4.3.2.2and4.3.2.3areapplicabletoReactorWaterCleanupsystem.Table3.3.2-2liststheisolationactuationinstrumentationtripsetpointsforthesystem.Thesesectionsandtheirimpliedbasiswereexaminedanditwasdeterminedthatthemarginofsafetyasdefinedinthisbasisisnotaffectedbythismodification.

JERKIN>.:91-200RF:DCP90-3035A,Rev.0AdditionofanewpurgewatersystemandalocalcontrolpaneltohousetheinstrumentationandcontrolsrequiredtosupportoperationofthenewseallessRWCUreplacementpumps.I.No.ThedesignbasisaccidentsintheFSARChapter'15andReloadNuclearAnalysiswerereviewedanditwasfoundthatnoneofthedesignbasisaccidentsareaffectedbythesemodifications.FSARSections5.4.8.1,5.4.8.2and5.4.8.3providethedesignbases,systemdescriptionandsystemevaluationfortheReactorWaterCleanupsystem.FSARTable5.4-2providesReactorWaterCleanupSystemEquipmentDesignData.FSARSection9.2.10providesdesignbasis,systemdescriptionandsafetyevaluationforCondensateStorageandTransferSystem.Thesesectionsandtablewerereviewedforapplicability.TheproposedmodificationstosupportthereplacementpumpsdonotalterthefunctionoftheReactorWaterCleanupSystem.II.No.~~ThefailuremodesassociatedwiththeRWCUpumpandthenewsupportingsystemsarenotinitiatingeventsforanydesignbasisaccidentanddonotaffectanysafetysystems.Thesechangesdonotmodifytheplantresponsetoadesignbasisaccident.Thesechangeshavenoeffectonsafetyfunctions,newpurgewaterpipingmeetsthehighenergypipebreakcriteriaprovidedintheFSARSection3.6.2.1.3andtheeffectsofthebreakfromthenewmoderateenergylineisboundedbythebreaksinotherlargerlines.III.No.ThissafetyevaluationaddressesonlyimpactsofthepotentialleakagefromtheRWCUsystemonthenewpurgewaterskidandtheCondensateTransferSystem.TherearenosectionsoftheTechnicalSpecificationapplicabletotheCondensateStorageandTransferSystem,relatingtoflowcapacityofthesystem.

RREFEREE:NL-91-011,Rev.3DERIPTINFHAE:FuelPoolCleanoutProjecttoremoveallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.SIIMMARY:I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7.4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.II.No.Twotypesofaccidentsarepostulated:aloadedcaskdropscenarioanddrainingofthecaskstoragepitwithasignificantinventoryofirradiatedhardwarebecominguncovered.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARSection15.7.4.III.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.

$ER~.:91-202:DCP90-9114,Rev.0ERTPTIE:Installationofasamplingdevicetobeutilizedforprotectingthepresenceofbiofoulingmollusksintheriverwatermake-upwatersupplysystem.I.No.TheproposedactionaffectsonlytheRWMUsystembyaddingasampletankandassociated1/2"piping.TheRYEsystemisdiscussedintheFSARasconfirmedbyareviewofFSARSections9.2,9.5and10.4,however,nosafetyfunctionsarerelatedtotheRWMUsystem.Inaddition,nosafetyrelatedequipmentreliesdirectlyupontheRWMUsystemtoperformitssafetyfunction.ThereareTech.Spec.limitsonspraypondleveltoinsurethespraypondinventoryisadequateinthecaseofadesignbasisaccident;however,continuousmakeupisnotrequiredtoassureadequatespraypondlevel,andacontinuousremovalof1gpmwon'taffectthemake-upcapabilityoftheRWMUsystem.II.No.TherearenoplantsafetysystemsthatrelydirectlyupontheRWMUsystem,andthereliability/availabilityoftheRWMUsystemisnotaffected.III.No.TheRWMUsystemisnotmentionedinthebasisforanyTechnicalSpecification.Thebasisfortheservicewatersystems(ESW&RHRSW),whichuseriverwaterasmakeup(SectionB3/4.7.1),arenotaffectedbytheproposedaction,sincefailureoftheproposedmodificationwillnotaffectthecapabilityoftheRWMUsystem.

$ER~,:91-203REFEREE:DCP90-3089,Rev.0DERIPTIFHAE:ReplacementofexistingPacificwedgegatevalvesonthefeedwaterheateranddraincoolerstartupventlinesandthesamevalvesonthebypassdrainlinesfortheextractionsteamtothe5A/B/CfeedwaterheatersonUnitItopreventthermalbinding.KKK!lLY:I.No.FSARsection15.6.4addressessteamsystempipingbreaksoutsidecontainment.Theboundingfaulteventforbreaksoutsidecontainmentisthecompleteseveranceofoneofthefourmainsteamlines.ThecalculatedexposureforthisaccidentisillustratedinFSARTable15.6-9andrepresentsonlyasmallfractionofthe10CFR100guidelines.NUREG0776Section15.3.3concludesthatthedesignprovidesadequateprotectionagainstsuchanaccident.Thisaccidentscenarioenvelopsthesametypefailureforthepipebeingmodified.Thereplacementvalvesarebeingpurchased,installed,andtestedinaccordancewiththesamedesigncodesastheoriginalvalves.Thevalves,andassociatedpipingwhereapplicable,arebeingweldedintotheexistingsystemusingapprovedSSESproceduresinordertominimizethechanceofleakage.Thevalvesarelocatedintheturbinebuildingandnosafetyrelatedequipmentisinstalledbelowthem.II.No.Thereplacementvalvesarebeingpurchased,installedandtestedinaccordancewithANSIB31.1,PowerPipingrequirementsasrequiredbyFSARsection3.2.Thereplacementvalves,andpipingwhereapplicable,willbeweldedintotheexistingsystemasaretheoriginalvalvesandpipinginordertominimizetheriskofleakageinaccordancewithFSARsection10.4.10.3.III.No.Thismodificationisnon-safetyrelatedanddoesnotaffectsystemshavingTechnicalSpecificationrequirements.Thismodificationaddsvalveswhicharetobedesigned,built,andinstalledtothesamestandardsastheexistingvalves.Thenewvalvesandpipingdonotchangethefunctionoroperationofthesysteminwhichtheyaretobeinstalled.

0

/ERIN.:91-204RREFERENE:DCP90-3004,Rev.1DERIPTIFHANE:ReplacementoftheCommonRecombinerVessel,thecatalystandtheCommonRecombinerCondenserandupgradetheheattracesystemfortheCommonRecombinerVessel.ZQNNARY:I.No.Section15.7.1oftheFSARevaluatestheconsequencesofanOffgasSystemboundaryruptureresultingfromaseismicevent,whichisthemostprobableandonlyconceivableeventwhichcouldcausesignificantdamagetothesystem.ThereplacementrecombinervesselandrecombinercondenserwillbedesignedinaccordancewiththeexistingdesignrequirementsoftherespectivecomponentswiththeexceptionthatrecombinercondenserwillbedesignedtoASMESectionVIIIinsteadofASMESectionIII,andwillbemoreresistanttostresscorrosioncracking.ThismodificationwillnotadverselyaffecttheabilityoftheGaseousRadwasteSystemtoreducethereleaseofradioactivematerialsingaseouseffluentstolimitsbelowtheconcentrationsspecifiedin1OCFRPart20.II.No.~~Section15.7.1oftheFSARevaluatestheconsequencesofabreachoftheOffgasSystemasaresultofseveraldifferentinitiatingevents,themostprobableofwhichisaseismicevent.Theimprovementinthereplacementrecombinervesselmaterial,heattracesystemandtherecombinercondensermaterialtoreducetheirsusceptibilitytocrackingreducestheprobabilityoffailurefromtheseevents.III.No.ThemodificationperformedwillnotaffectanyofthesystemperformancerequirementsconcerningradioactiveeffluentsandexplosivemixturesdiscussedinthebasesforTechnicalSpecificationSection3/4.11.2.ThereplacementrecombinervesselandrecombinercondenserwillperforminexactlythesamemannerasthecurrentcomponentsinmeetingtheTechnicalSpecificationrequirements.Thechangetoupgradedmaterialsandtheupgradeoftheheattracesystemfortherecombinervesselwillreducethesusceptibilitytocorrosioncrackingwhichwillincreasethemarginofsafetyoverthecurrentdesigns.TheadditionofflangestotheGaseousRadwasteRecombinerClosedCoolingWaterconnectionsonthecondenser,thereplacementoftherecombinervesseldrainlineandtheadditionoftheisolationvalvestothecondensatecooleroutletlineswillnotaffecttheoperationofthesysteminmeetingtheTechnicalSpecificationrequirements.

~ER~N).:91-205RREFERENE:NL91-028,Rev.0ERIPTIFHAE:ReorganizationoftheNuclearDepartmentfollowingimplementationofthedepartmentOperationalEffectivenessReview(OER).MMARY:I.No.Chapter12.1,12.5,13.1,13.4and17.2oftheFSARwerereviewed.Theeffectsoforganizationalchangeswerereviewedfromasafetystandpoint.Nolineorsupportfunctionshavebeendeleted.Thereisnooverallreductioninstaff.Clearlinesofauthorityandresponsibilityhavebeenmaintained.NuclearQualityAssurance,NuclearSafetyAssessment,NuclearTrainingandHealthPhysicscontinuetoenjoyorganizationalfreedomtobeindependentofoperationalpressures.II.No.Thechangefromafocusonadisciplineorientedorganizationtoakeyfunctionalfocuswillallowlocalmanagerstheabilitytosolvetheirownproblemsandminimizethenumberofinterfacesnecessarytoaccomplishnormalfunctions.III.No.TheneworganizationmeetsalltheaspectsoforganizationalstructuresasstatedinTechSpec6.2Organization.AllaspectsoftheorganizationchartswhichareimportanttosafetyhaveremainedintheTechSpecs.

~ER~N.:91-206RREFERENE:NL-91-011,Rev.4DERIPTINFHANE:Removalofallirradiatedreactorvesselcomponents(excludingspentfuel)fromtheUnit1andUnit2spentfuelpools.@@@MARY:I.No.AccidentanalysescontainedintheFSARforaFuelHandlingAccident(FSAR15.7.4)addressaccidentsfarmoreseverethansimilaraccidentspostulatedforthisproject.Section15.7.5intheFSARaddressesaSpentFuelCaskDropAccidentandconcludesthatthiseventisnotcredibleduetotheuseofredundantriggingandasinglefailureproofcrane.TheFuelPoolCleanoutProjectactivitiesarethereforeboundedbytheFSARanalysesnoted.II.No.Irradiatedhardwarewillbeloadedandtransportedincaskssimilartospentfuelcasks.CaskdropaccidentsarenotconsideredacredibleaccidentperFSARSection15.7.5duetoredundantriggingandasinglefailureproofcrane,preventingasinglefailure.Lossofwatershieldinginthecaskstoragepitisacrediblescenarioforevaluation.TheairborneradiologicalconsequencesofthiseventwouldbeboundedbytheFuelHandlingAccidentanalyzedinFSARSection15.7.4.IH.No.AllFuelPoolCleanoutProjectactivitieswillbeconductedinaccordancewithplantTechnicalSpecifications.ThefollowingTechnicalSpecificationswerereviewed:3/4.3.2,3/4.3.7,3/4.9.6,3/4.9.7,3/4.9.9,3/4.11.3,3/4.11.4,5.6.2,6.9.1.8and6.13.

JERKIN.:91-207RREFEREE:DCP90-3035D,Rev.0ERlPTIFHAE'eplacementofexistingRWCUpump1P221Bwithanewseallesspumptoreducetheneedtorepairandremovethepumpfromservice.BVMMAilY:I.No.FSARSections5.4.8.1,5.4.8.2and5.4.8.3providethecriteria,systemdescriptionandsystemevaluationfortheReactorWatercleanupsystem.FSARTables3.2-1&5.4-2provideReactorWaterCleanupSystemEquipmentDesignBasisandData.FSARSection7.3.1.1A.2.4.1.9addresseshighflowisolationinstrumentation.Thesesectionsandtablesandthedesignbasiswerereviewedforapplicability.TheproposedmodificationtoreplacetheexistingpumpsdoesnotalterthefunctionoftheReactorWaterCleanupSystem.TheotherfunctionoftheRWCUsystemaffectedbythismodificationistheleakdetectioncapability.FSARSection7.3.1.1a.2.4.1.9providesadescriptionandthebasesfortheleakagedetectionsystemfortheRWCUsystem.Thedesignoftheleakagedetectionfeatureswasnotaffectedbythismodification.II.No.Thereplacementpump,pipingandotherassociatedcomponentsareincompliancewithFSARcriteriaandregulatoryrequirementsandtheleakagedetectioncapabilityisnotaffected.Apossiblemalfunctionofadifferenttypecouldbecreatedbyachangethataddsanewsinglefailure.Thesechangesdonotaddanynewsinglefailure.III.No.TechnicalSpecificationsections3.3.2,4.3.2.1,4.3.2.2and4.3.2.3areapplicabletoReactorWaterCleanupsystem.Table3.3.2-2liststheisolationactuationinstrumentationtripsetpointsforthesystem.Thesesectionsandtheirimpliedbasiswereexaminedanditwasdeterminedthatthemarginofsafetyasdefinedinthisbasisisnotaffectedbythismodification.

~ERNO:.91-208RREFEREE:DCP90-3035C,Rev.0RIFAE:ReplacementofexistingRWCUPump1P221Awithanewseallesspumptoreducetheneedtorepairandremovethepumpfromservice.sjlMNARY:I.No.FSARSections5.4.8.1,5.4.8.2and5.4.8.3providethecriteria,systemdescriptionandsystemevaluationfortheReactorWatercleanupsystem.FSARTables3.2-1&5.4-2provideReactorWaterCleanupSystemEquipmentDesignBasisandData.FSARSection7.3.1.1A.2.4.1.9addresseshighflowisolationinstrumentation.Thesesectionsandtablesandthedesignbasiswerereviewedforapplicability.TheproposedmodificationtoreplacetheexistingpumpsdoesnotalterthefunctionoftheReactorWaterCleanupSystem.TheotherfunctionoftheRWCUsystemaffectedbythismodificationistheleakdetectioncapability.FSARSection7.3.1.1a.2.4.1.9providesadescriptionandthebasesfortheleakagedetectionsystemfortheRWCUsystem.Thedesignoftheleakagedetectionfeatureswasnotaffectedbythismodification.H.No.'hereplacementpump,pipingandotherassociatedcomponentsareincompliancewithFSARcriteriaandregulatoryrequirementsandtheleakagedetectioncapabilityisnotaffected.Apossiblemalfunctionofadifferenttypecouldbecreatedbyachangethataddsanewsinglefailure.Thesechangesdonotaddanynewsinglefailure.IH.No.Technicalspecificationsections3.3.2,4.3.2.1,4.3.2.2and4.3.2.3areapplicabletoReactorWaterCleanupsystem.Table3.3.2-2liststheisolationactuationinstrumentationtripsetpointsforthesystem.Thesesectionsandtheirimpliedbasiswereexaminedanditwasdeterminedthatthemarginofsafetyasdefinedinthisbasisisnotaffectedbythismodification.

~ER~.:91-209RREFEREN:DCP91-3014Z,Rev.0DERIFAE:Additionofmulti-pinquickdisconnectconnectors(QDC)attheinterfaceofthefieldcablesandracewaysystemwiththevalveoperatorlimitswitchcompartmentoftheDrywellMOVsforRBCCW,CIG,MainSteam,RWCU,ReactorRecirculationandRCICtofacilitateremovalofthemotoractuator.$QMM'BARF:I.No.II.No.Theadditionofmulti-pinandsingle-pinquickdisconnectconnectorsonthemotoractuatorofvalvesinsidetheprimarycontainmentdoesnotaffectanyofthepostulatedinitiatingeventsidentifiedinChapter6and15oftheFSARorNUREG-0776.Thus,theproposedactiondoesnotincreasetheprobabilityofoccurrenceofanaccident.Theprobabilityofanincreaseintheconsequencesofanaccidentisnotaffectedbytheproposedaction.Thesafetyfunctionofallofthevalvesisnotchangedbytheadditionofthemulti-pinandsingle-pinquickdisconnectconnectors.Thereviewdidnotidentifyapostulatedinitiatingeventwhichwouldcreatethepossibilityforanaccidentofadifferenttype.ElectricalseparationoftheClass1Eandaffiliatedpowerandcontrolandthenon-Class1EcontrolandinstrumentationismaintainedinaccordancewithPP&LSpecificationE-1012andFSARSection8.3.1.11.4.III.No.TechSpecsections3/4.6.3,3/4.4.1and3.8.4.2.1werereviewed.Theproposedactionassociatedwiththesevalvesdoesnotaffecttheoperabilityrequirements,surveillancerequirementsoranyexistingmarginofsafetyinanyTechnicalSpecification.

/ERIN.:91-210RREFEREE:DCP90-3026,Rev.2DERIPTIFHANE:ExistingUnit1ReactorBuildingSampleStation(RBSS)(1C210)andTurbineBuildingSamplingStation(ASS)(1C132)arebeingreplacedtoupdateinstrumentationandmonitoringsystems./@+MARY:I.No.ILNo.FSARSections9.2.2.1,9.3.1.1.1,9.2.9.1,9.4.4.1and9.3.2.3werereviewed.Theystatethatallsystems,exceptReactorBuildingventilationandRBCCW,havenosafety-relatedfunctions.Thereferencesectionswerereviewedanditwasdeterminedthatthischangedoesnotchangethefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.ThereviewofFSARSections6.2.3.2.3.1,6.2.4.3.3.5and9.2.23indicatethattheRBCCWSystemcontainmentpenetrationsandisolationvalvesperformcontainmentisolationfunctionswhichareimportanttosafety.Theinstallationofnewpipingunderthischangedoesnotchangetheprobabilityofoccurrenceortheconsequencesofanaccidentormalfunctionofthesecomponentsoverthatwhichwaspreviouslyevaluated.Malfunctionofthesamplestationsorthemodulatingdamperdoesnothaveanadverseaffectonthesafetyfunctionofthereactorbuildingrecirculationmode.BasedonthereviewofFSARSection9.4.4theTurbineBuildingHVACsystemisanon-safetyrelatedsystemwhichisnotrequiredtooperatetomitigatetheconsequencesofanaccident.TheadditionalelectricalloadaddedbythischangedoesnotexceedtheloadmarginprovidedinFSARtables8.3.1through8.3.5.III.No.ThismodificationdoesnotreducethemarginofsafetysincetheinterfacesbeinginstalledfortheTBSSandRBSSarenotsafety-relatedanddonotaffectanymarginsofsafetydescribedintheTechnicalSpecifications.

/ERIN.:91-211RREFEREE:DCP91-9012FthruW,Rev.0DRlPTIFPANE:ReplacementofUnit2Non-1Eoversized125VDCcircuitbreakersandDCratedreplacementsubfuses.~jggi~RY:I.No.Thereplacementbreakersareidenticalreplacementsfororiginalequipmentexceptthatthetripratingsmatchthederatedampacitiesoftheconnectedcablesinordertominimizetotheextentpracticabletheeffectsofasustainedlimitedmagnitudefault.Thereplacementfusesareidenticalreplacementsfororiginalequipmentandaresizedtomaintaincoordinationwiththelowertrippointbreakers.H.No.Installationofproperlysizedanddedicationtestedreplacementbreakersandproperlysizedfusesdoesnotmodifythenon-safetyrelatedfunctionsofthesystemloads.TheproposedmodificationdoesnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-21.IH.No.~~Theproposedactiondoesnotmodifythefunctionorcapacityofanyconnectednon-safetyrelatedsystemsandincreasestheprobabilityofsystemsremainingfunctionalintheeventofasustainedlimitedmagnitudefaultabovethecableampacitybyopeningtheaffectedcircuit.Thislimits,totheextentpractical,damagetoadjacentcablesofothernon-safetysystemsinthesameraceway.ThereforetheproposedactiondoesnotreducethemarginofsafetyasdefinedinthebasisforanyTechnicalSpecification.

/ERIN.:91-212RREFERENE:DCP91-9004Z,Rev.0DERIPTINFHAE:ReplacementofUnit1Class1EOversized125VDCcircuitbreakers.~~jQ}/MARY:I.No.Thereplacementbreakersarededicatedreplacementsfororiginalequipmentwithtripratingswhichmatchthederatedampacitiesoftheconnectedcablesinordertominimizetotheextentpracticabletheeffectsofasustainedlimitedmagnitudefault.ThefailuremodeandeffectsanalysisforthereplacementbreakersisboundedbyexistinganalysisprovidedinFSARTable8.3-21for1D614,1D624,1D634,&1D644branchcircuitbreakers.Thefunctionsoftheconnectedloadsystemsarenotmodifiedbythisaction.II.No.Installationofproperlysizedanddedicationtestedreplacementbreakersandproperlysized&qualifiedfusesdoesnotmodifythefunctionsofthesystemloads.TheproposedmodificationdoesnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-21.BaseduponreviewofSection8.0ElectricPowerSystemsofNUREG0776SafetyEvaluationReportincludingSupplements1through7theproposedactiondoesnotaffectanyTechnicalSpecification/BasesanddoesnotreducethemarginofsafetyasdefinedinthebasisforanyTechnicalSpecification.

$ER~N.:91-213RREFERENE:DCP89-9153A,B&C,Rev.1ERIPTINFHAE:RemovalofexistingsealsandinstallationofnewRHRpump"Hot"sealsandsealpiping.AlsoisolationofexistingsealcoolersfromtheRHRandESWfluidsystems.RemovalofESWpipingsealcoolersandassociatedhardwaremadeobsoletebythischange.Also,additionofflangesinESWsupply/returnlinesatbranchconnectionstoRHRpumpsealandmotoroilcoolers.KSfAilY:I.No.ThedesignhasbeenreviewedagainstSection5.4.7(RHR),Section6.2(containmentcooling)Section6.3(ECCS-RHR/LPC1)andSection9.2.5(ESW)toconfirmthatthedesignchangeswillnotincreasethepossibilityofanaccidentnoraffectthesubjectsystemsoranyothersystemsrelyingontheirfunction/operation.H.No.Installingthenew"HOT"sealanddeletingESWcoolingtothenewsealwillnotaffectthefunctionoftheRHRorESWsystemsoranycomponentorsystemrelyingonthesubjectsystems.ThenewsealshalleliminatetheRHR/ESWinterfacethustendingtosimplifytheoperationofthesystemsandreducethepotentialforoperationalerrororradioactivereleasestotheenvironment.III.No.TechnicalBases3/4.4.9and3/4.9.11(RHR),3/4.5.1&3/4.5.2(ECCS-OperatingandShutdown),3/4.7.1ServiceWaterSystemsand3/4.6.1PrimaryContainmentwerereviewed.ThischangewillnotalterRHRpumpfunctionalcapabilityforLPCIoperation.Also,theeliminationofESWcoolingwatertotheRHRpumpsealcoolerreducesthecoolingcapacityloadonthesystem,thusincreasingavailabilityofcoolingwaterforoperationofthesafetyrelatedequipment.

/ERIN.:91-214RREFERENE:DCP90-3014,Rev.0DERIPTIFPANE:InstallationofawearstriponthelowervalveguideofHPCIvalveHV155F003topreventvalveleakagewhichoccurswhenwearonthevalveguideresultsinmisalignmentofthevalvediscintheseat.MRY:I.No.Failureofthewearstripcouldresultinthevalvenotfullyclosing.Singleactivecomponentfailures(SACF)suchasfailureofavalvetoopenorclosearemoderatefrequencyaccidentsasstatedinFSARSection15A.3.3.2.Singlefailureofanysingleelectricaldeviceissimilarlyevaluatedtohaveamoderatefrequency.Failureofthevalvetoclosewhetheritbefromthewearstripbindingthevalve,amechanicalproblemwiththeactuator,oranelectricalsupplyfailuretotheoperatoreachhavethesameprobabilityofoccurrenceasdefinedinFSARSection15.0.3andresultinthesameconsequence.H.No.~~Intheworstcase,theintroductionofthewearstripintotheHPCIsteamsupplylinecouldleadtodamageorfailureoftheHPCIturbinebuckets,SingleactivecomponentfailurescanrenderindividualsystemswithintheECCSinoperablewithouteffectingthereliabilityoftheECCSsystemasdiscussedinFSARSection6.3.2.5.TheinboardHPCIisolationvalveHV-155FOO2istobeclosed,deenergized,andtaggedtopreventoperationduringthismodificationinordertoensurethatanOperationwithPotentialforDrainingreactorVessel/Cavity(OPDRV/C)doesnotexist.Thesemeasureswillprecludeareactorcavitydrain-downeventandanaccidentofadifferenttypewillnotbecreated.III.No.ThismodificationwillincreasethevalvereliabilityinprovidingHPCIsteamlineisolationintheeventofasteamsupplylinebreakorlowreactorpressure.TheadditionofwearstripstovalveHV155FOO3doesnotaffecttheautomaticisolationclosuretimeofthevalvesasspecifiedinTable3.6.3-1oftheTechnicalSpecifications.HPCIisnotrequiredtobeoperableduringmodes4or5whenthismodificationwillbeperformed.Therefore,themarginofsafetyasdefinedinthedesignbasisforSection3/4.6.3PrimaryContainmentIsolationValvesisnotreduced.

/ERIN.:91-215RREFERENE:NL-91-023,Rev.1ER1PTINFHAMEInspectionofirradiatedfuelrodstodeterminetheconditionofthefuelassembliesfollowingirradiation.$QMilARY:I.No.FSARSections9.1.4.2.7.1,9.1.4.3.7,9.1.4.5.1,9.1.5and15.7.4werereviewed.ThefuelinspectionsarenotcoveredintheFSAR.Thereviewevaluatedhandlingfuel,droppingequipmentintothespentfuelpoolandinteractionwithplantauxiliarysystemswhicharesimilartoeventspreviouslyevaluatedintheFSAR.II.No.Potentialneweventsevaluatedwere,(1)radiationstreamingontherefuelingfloor,(2)damagetotherefuelingfloorcurb,(3)damagetoafuelrodduringinspection,(4)hotparticlesand,(5)adroppedfuelrod.Theuseoftheinspectionequipmentortechniquesdoesnotcreateanyhazardotherthanthosepreviouslyevaluated.Technical'Specifications3/4.9.6,3/4.9.7and3/4.9.9werereviewed.Theproposedfuelinspectionswillnotreduceanymarginofsafetybecause(1)theequipmentisdesignedtoperformfuelinspections,(2)aminimumof7feetofwatershieldingwillbemaintainedaboveirradiatedcomponents,(3)theradiologicalconsequencesoffueldamagethatcouldoccurduringtheinspectionarelessthanthosepreviouslyevaluatedintheFSAR,and4)allfuelhandlingoperationswillbeperformedinaccordancewithRE-081-102,'FuelMovementsWithinVaultandPoolLocations,whichrequiresallTechnical,Specificationsrelatedtofuelhandlingtobecompliedwithpriortoandduringalloperationsrelatedtomovingirradiatedfuelinthespentfuelpool.

E'ERNO:.91-216RREFEREE:DCP90-3082.Rev.0DERIPTIFHANE:InstallationinUnit2ofaSF6gasinjectionsystemintotheCirculatingWaterSystemusedtoidentifycondensertubeleaksinthemaincondenserwaterboxes.Also,installationofcondenserhotwellHP,IPandLPsamplelinestotheTurbineBuildingSampleStation(TBSS)forwaterchemistrymonitoringofcondensatewater.SIIMNARY:I.No."FSARSections10.4.5,9.3.2.3,10.4.7and9.2.9.1statethatthemechanical,electricalandsamplingsystemshavenosafety-relatedfunctions.Thereferencedsectionswerereviewedanditwasdeterminedthatthischangedoesnotaffectthefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.Theimpactoftheequipmentinstallationinthischangeonthedieselgeneratorhasbeenevaluatedanddeterminedtohavenoeffectonthesafetyfunctionsofthedieselgenerators.Theprocesssamplingsystemdoesnotperformanysafetyfunctions.Thesamplelinesinstalledandmadeoperationalbythischangeareonlyforchemistrymonitoringandprovidenodirectcontrolfunction.Lossofsamplelineflowduetoblockageorbreakage,resultsinlossofchemistrymonitoringuntilcorrectedbutdoesnotcreateanypossibilityforunevaluatedaccidentsormalfunction.BreakageoflinesofthissizeisaddressedinFSARSection15.6.2andresultsfoundacceptable.TheSF6gascanactasanasphyxiantinahighconcentration.Calculationsdeterminedthat20lbs.isthemaximumamountthatcanbestoredandmaintainasafeenvironment.III.No.Thefirstmodification,SF6injection,istappedintotheCirculatingWaterSystempipingwhichisnotpartofanysafety-relatedsystemorpressureboundaryandthusisnotdiscussedinthebasisforanyTechnicalSpecification.Thesecondmodification,thecondenserhotwellHP,IPandLPsamplesinterfacesaretothe'BSSandthecondensatepiping.TheTBSSdoesnothaveanyaffectonthemarginofsafetydescribedintheTechnicalSpecification.ThecondensatepipingwhichisthelocationofthesamplenozzletapsisnotdiscussedinthebasisforanyTechnicalSpecification.ThetapsarelocateddownstreamoftheNuclearBoilerisolationvalves.TheReactorCoolingSystemchemistryasnotedintheTechnicalSpecificationsection3/4.4.4willnotbeaffected.

RREFERENE:DCP90-3081,Rev.0DERIPTIFHANE:InstallationinUnit1ofaSF6gasinjectionsystemintotheCirculatingWaterSystemusedtoidentifycondensertubeleaksinthemaincondenserwaterboxes.Also,installationofcondenserhotwellHP,IPandLPsamplelinestotheTurbineBuildingSampleStation(TBSS)forwaterchemistrymonitoringofcondensatewater.$QMMARF:I.No.FSARSections10.4.5,9.3.2.3,10.4.7and9.2.9.1statethatthemechanical,electricalandsamplingsystemshavenosafety-relatedfunctions.Thereferencedsectionswerereviewedanditwasdeterminedthatthischangedoesnotaffectthefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.Theimpactoftheequipmentinstallationinthischangeonthedieselgeneratorhasbeenevaluatedanddeterminedtohavenoeffectonthesafetyfunctionsofthedieselgenerators.H.No.~~Theprocesssamplingsystemdoesnotperformanysafetyfunctions.Thesamplelinesinstalledandmadeoperationalbythischangeareonlyforchemistrymonitoringandprovidenodirectcontrolfunction.Lossofsamplelineflowduetoblockageorbreakage,resultsinlossofchemistrymonitoringuntilcorrectedbutdoesnotcreateanypossibilityforunevaluatedaccidentsormalfunction.BreakageoflinesofthissizeisaddressedinFSARSection15.6.2andresultsfoundacceptable.TheSF5gascanactasanasphyxiantinahighconcentration.Calculationsdeterminedthat20lbs.isthemaximumamountthatcanbestoredandmaintainasafeenvironment.IH.No.Thefirstmodification,SF6injection,istappedintotheCirculatingWaterSystempipingwhichisnotpartofanysafety-relatedsystemorpressureboundaryandthusisnotdiscussedinthebasisforanyTechnicalSpecification.Thesecondmodification,thecondenserhotwellHP,IPandLPsamplesinterfacesaretotheTBSSandthecondensatepiping.TheTBSSdoesnothaveanyaffectonthemarginofsafetydescribedintheTechnicalSpecification.ThecondensatepipingwhichisthelocationofthesamplenozzletapsisnotdiscussedinthebasisforanyTechnicalSpecification.ThetapsarelocateddownstreamoftheNuclearBoilerisolationvalves.TheReactorCoolingSystemchemistryasnotedintheTechnicalSpecificationsection3/4-4.4willnotbeaffected.

RREFEREEE:DCP90-3080,Rev.0ERIPTIFHANE:InstallationofanIonChromatographgC)UnitintheUnit1TurbineBuildingSampleStation(TBSS).$QigM4,RY:I.No.TheFSARsections9.3.2.3and9.3.3.3containthefunctionandrequirementsoftheinterfacingandProcessSamplingSystems.Theystatethattheelectricalandsamplingsystemshavenosafety-relatedfunctions.Thereferencedsectionswerereviewedanditwasdeterminedthatthismodificationdoesnotaffectthefunctionofthesystemsortheoperator'sinterfacewiththesesystemsoranysafetysystem.II.No.TheprocesssamplingsystemdescribedinFSARsection9.3.2.3doesnotperformanysafetyfunctions.Thesamplelinesinstalledandmadeoperationalbythischangeareonlyforchemistrymonitoringandprovidenodirectcontrolfunction.Lossofsamplelineflowduetoblockageorbreakageresultsinlossofchemistrymonitoringuntilcorrectedbutdoesnotcreateanypossibilityforunevaluatedaccidentsormalfunction.BreakageoflinesofthissizeisaddressedinFSARSection15.6.2andresultsfoundacceptable,III.No.TheTBSSdoesnothaveanyeffectonthemarginofsafetydescribedintheTechnicalSpecification.TheReactorCoolingSystemchemistryasnotedintheTechnicalSpecificationSection3/4.4.4willnotbeaffectedasaresultofthemodificationperformedbythischange.

/ERIN.:91-219RREFERENE:DCP90-3042,Rev.0DERIPTINFHANE:RetirementofUnit2ReactorBuildingandTurbineBuildingSampleStations(RBSSandTBSS)thatwereabandonedunderapreviouschangeforrecoveryofplantspace'ndpreventionofinadvertentoperationoftheequipment./~MARY:I.No.Noneoftheequipmentorpipingthatisbeingremovedfromtheplantbythischangehasanaffectonequipmentorsystemsthatareimportanttosafety.Alloftheequipmentandpipingthatarebeingaffectedbythischangewereabandonedunderpreviouschanges.II.No.IH.No.Thischangedoesnotcreateapossibilityofadifferenttypeofaccidentormalfunctionbecausetheequipmentisisolatedandnotfunctional.Theremovalofthisequipmentactuallyreducesthepossibilityforanaccidentormalfunctionofanytypebecauseiteliminatesunnecessaryequipmentandvalvesthatcouldbeinadvertentlyoperated.TheFSARwillbeupdatedasaresultofthischange.Thisupdatewilldeletetheequipmentthatisbeingeliminatedfromtheplant.RBCCWandtheReactorBuildingZoneIIventilationsystemaretheonlysystemsthatareaddressedinTechnicalSpecifications.TechnicalSpecification3/4.6.3requiresthattheRBCCWcontainmentisolationvalvesshallbeoperable.Thischangewillhavenoeffectontheoperabilityofthesevalvessincetheworkisbeingcompletedonasmallbranchlinethatwillbeisolatedfromthesystemwhiletheworkisbeingcompleted.TechnicalSpecification3/4.6.5requiresthatsecondarycontainmentintegritybemaintained.AregisterisbeinginstalledintheductworkthatisbeingdisconnectedfromtheRBSStoassurethatproperairflowbalanceismaintained.TechnicalSpecification3.4.11.2.5discussestheoperabilityoftheventilationexhaustgastreatmentsystems.ImplementationofthischangedoesnotrequirethattheZoneIIequipmentcompartmentexhaustsystem(Filteredexhaust)betakenoutofservice,thereforemaintainingthesystemTechnicalSpecificationintegrity.

/ERIN.:91-220RREFEREE:DCP90-3041,Rev.0DERIPTIFPANE:RetirementofUnit1ReactorBuildingandTurbineBuildingSampleStations(RBSSandTBSS)thatwereabandonedunderapreviouschangeforrecoveryofplantspaceandpreventionofinadvertentoperationoftheequipment.~ARY:I.No.Noneoftheequipmentorpipingthatisbeingremovedfromtheplantbythischangehasanaffectonequipmentorsystemsthatareimportanttosafety.Alloftheequipmentandpipingthatarebeingaffectedbythischangewereabandonedunderpreviouschanges.II.No.Thischangedoesnotcreateapossibilityofadifferenttypeofaccidentormalfunctionbecausetheequipmentisisolatedandnotfunctional.Theremovalofthisequipmentactuallyreducesthepossibilityforanaccidentormalfunctionofanytypebecauseiteliminatesunnecessaryequipmentandvalvesthatcouldbeinadvertentlyoperated.TheFSARwillbeupdatedasaresultofthischange.Thisupdatewilldeletetheequipmentthatisbeingeliminatedfromtheplant.III.No.RBCCWandtheReactorBuildingZoneIventilationsystemaretheonlysystemsthatareaddressedinTechnicalSpecifications.TechnicalSpecification3/4.6.3requiresthattheRBCCWcontainmentisolationvalvesshallbeoperable.Thischangewillhavenoeffectontheoperabilityofthesevalvessincetheworkisbeingcompletedonasmallbranchlinethatwillbeisolatedfromthesystemwhiletheworkisbeingcompleted.TechnicalSpecification3/4.6.5requiresthatsecondarycontainmentintegritybemaintained.AregisterisbeinginstalledintheductworkthatisbeingdisconnectedfromtheRBSStoassurethatproperairflowbalanceismaintained.TechnicalSpecification3.4.11.2.5discussestheoperabilityoftheventilationexhaustgastreatmentsystems.ImplementationofthischangedoesnotrequirethattheZoneIequipmentcompartmentexhaustsystem(Filteredexhaust)betakenoutofservice,thereforemaintainingthesystemTechnicalSpecificationintegrity.

JERKIN.:91-221E:DCP90-3108E,J&K,Rev.0HANE:Modificationtoexistingpipesupport/restraintconfigurationthatarerequiredinordertoreducethetotalnumberofmechanicalsnubberslocatedonDieselGenerator'E',Feedwater-InsideContainment,andRPVInstrumentationPipingSystems.R:I.No.II.No.Thesystemsincludedinthisproposedmodificationwerereanalyzedtojustifytheremovalofunnecessarysnubbersandtheirpipesupportconfigurationsareto,bemodifiedaccordingly.Thereanalysisisinaccordancewiththeoriginaldesignbasis,andhasbeenperformedinaccordancewithacceptedindustrycodes.Allaspectsoftheexistingqualificationcalculationshavebeenaddressed,alloriginalinterfacedesignparameterssuchasequipmentallowableshavebeenconsideredandallsystemdesignrequirementsasspecifiedintheDesignSpecificationsandFSARhavebeenaddressedinthereanalysiseffort.Asintheexistingpipinganalysis,theapplicablecodedesignlimitshavebeenmettoensurepipingintegrityandsystemfunction;FSARSection15.0.3.1,15.0.3.5.Theaccidentevents/causesinFSARChapter15.0thatareapplicabletothisproposedactioninvolvepipebreaks.Theproposedactiononlyreducesthenumberofseismicandhydrodynamicrestraints(snubbers)onselectedpipingsystemsbyreanalyzingeachlineusingoptimumrestraintconfigurations.Theoriginaldesignbasisisbeingfollowed.Theoriginalallowableequipmentinterfaceloadsarestillbeingmetandthepipebreakcriteriaremainsunchanged,IH.No.TechnicalSpecifications3/4.8.1,3/4.3.1thru3.5,3/4.5.1,3/4.4.8,3/4.6.1,3/4.6.3and3/4.7.4werereviewed.TheproposedactionreducestheoverallsnubberpopulationforSSESUnit1.Incasesofsnubbersizechangethesametypeofsnubberascurrentlyinstalled,PacificScientificmechanicalsnubbers,willbeusedwherenecessary-i.e.,nonewtypeofsnubberwillbeintroducedbythesemodifications.Thebases,asdefinedintheTechnicalSpecifications,dealwithsnubbertestrequirementsandarenotdirectlyaffectedbythisproposedaction.

/ERIN).:91-222DERlPTI:DCP91-9068,AthruX,Rev.0HANE:ReplacementofUnit1'on-1Eoversized125VDCcircuitbreakers.MMARF:I.No.Thereplacementbreakersareidenticalreplacementsfororiginalequipmentexceptthatthetripratingsmatchthederatedampacitiesoftheconnectedcablesinordertominimizetotheextentpracticabletheeffectsofasustainedlimitedmagnitudefault.Thereplacementfusesmeetorexceedtheperformancecharacteristicsoftheoriginalequipmentandaresizedtomaintaincoordinationwiththelowertrippointbreakers.Thenon-safetyrelatedfunctionsoftheconnectedloadsystemsarenotmodifiedbythisaction.II.No.Installationofproperlysizedreplacementbreakersandproperlysizedfusesdoesnotmodifythenon-safetyrelatedfunctionsofthesystemloads.TheproposedmodificationdoesnotintroduceanyfailuremodesdifferentthanalreadyanalyzedinFSARTable8.3-21.Theproposedactiondoesnotmodifythefunctionorcapacityofanyconnectednon-safetyrelatedsystemsandincreasestheprobabilityofsystemsremainingfunctionalintheeventofasustainedlimitedmagnitudefaultabovethecableampacitybyopeningtheaffectedcircuit.Thislimits,totheextentpractical,damagetoadjacentcablesofothernon-safetysystemsinthesameraceway.

~ER~N.:91-223RREFEREE.NL-91-031,Rev.0DERlPTIFEMProcedurechangetoOP-139-001toallowflowthroughUnit1condensatedemineralizersinexcessof5760gpmupto6200gpmuntilflowscanberestoredtonormalvaluesbecauseofdirtyresintrapsontheoutletofotherdeminvessels.RYYMMARY:I.No.Section15.6.6oftheFSARdescribesafeedwaterlinebreakoutsidecontainment.Failureofacondensatedemineralizerpressureboundarywouldproduceanaccidentwhichissimilartothisanalyzedevent.However,theincreasedflowdoesnotincreasetheprobabilityoffailureofthepressureboundary.Allcomponentswhichexperienceincreasedflow(thedeminvessel,thepiping,theflowinstrumentation,andtheresintrap)canaccommodatetheincreasedflowwithoutexceedingtheirdesignlimitsforstructuralintegrity.Theconsequencesarealsonotincreased.Theeffectofalossoffeedwaterisnotsignificantlychangedbychangestodeminflows.II.No.~~Chapter15oftheFSARwasreviewed.Noaccidentwillbecreatedwhichisnotalreadyaddressed.Nofailuresareexpectedwhichcouldcauseanaccident.HI.No.ThebasissectionoftheTechnicalSpecificationswasreviewed.Themarginofsafetyisnotreducedasdefinedinthebasis.Condensatedemineralizerfiowsarenotmentionedinthebasis.

RREFEREE:NL-91-032,Rev.0DERIPTIFHANE:InstallationofpressuremonitoringinstrumentationandastripchartrecorderfortheRadwasteSolidificationSampleSystem(RWSS)tomonitorsystempressuresduringnormalsystemoperation.JtlMh/ARF:I.No.UponreviewofFSARsection15.7.3PostulatedRadioactiveReleasesDueToLiquidRadwasteTankFailureithasbeendeterminedthatthisprocedurehasnoimpactonthepostulatedeventsofcracksinthetanksoroperatorerror.Systemoperationdoesnotchangeandtheprobabilityofatankcrackisnotinfluencedbyimplementationofthisprocedure.H.No.Theonlydifferenceinoperationofthesystemwillbetheinstallationofapressuretransmitterandthemonitoringofthepumplogic.Intheeventofapressuretransmitterfailuretheresultwouldbeminimalleakageofsludgeontofloor.Forthemonitoringofthepumplogicthestripchartrecorderchannelcouldeithercauseanopencircuitorashortcircuit.Ifanopencircuitweretooccuronlythechannelofthestripchartrecordermonitoringwouldbeaffected.ShouldashortcircuitdeveloptheresultwouldbeablownfuseintheRWSSSamplePumplogicwhichwouldterminatethetransfer.III.No.Monitoringofsystempressureandacontactpoint'svoltagewillnotaffectanymarginofsafetyofthesystem.WithregardstoTechSpecs,thissystemdoesnothaveaffectonanyothersystemotherthanitselfandthissystemisnotTechSpecrelated.

RREE:DCP91-3019,Rev.0DER?PTIFHAE:ModificationofRCICSteamAdmissionValveandcontrolcircuittoresolvestartupoverspeedconcerns.R:I.No.ThemodificationdoesnotincreasetheprobabilityofoccurrenceofanaccidentaspreviouslyevaluatedintheFSAR,becauseatotalfailureofthesteamadmissionvalveoritscontrolcircuitwouldnotresultinanaccidentaspreviouslyevaluatedintheFSAR.ThemodificationdoesnotincreasetheconsequencesofanaccidentaspreviouslyevaluatedintheFSAR.TheFSARChapter15accidentanalyseswerereviewedforimpactbutnonewasfound.RCICmaybeusedtohelpmaintainreactorwaterlevelincaseofaLOCA,however,perFSARSection7.4.2.1.2.1.8RCICmeetsthesingle-failurecriteriononanetworkbasiswithHPCI.ItisnotnecessaryforRCICalonetomeetthesinglefailurecriterionsinceitsfunctionisduplicatedorbackedupbyothersystems.Regardless,thismodificationonlyimprovesRCICsystemreliability.Thenewelectricalcomponents(auxiliaryrelaysandtimedelayrelay)beinginstalledbythismodificationarehighlyreliable.However,shouldoneofthesecomponentsfail,theonlyoperatingscenariothatmightoccurwhichisnotsimilartowhatisseentodayisthatthesteamadmissionvalvemightremainstuckatabout10%openleavingtheturbineturningatidlespeed.ThislowprobabilityeventisenvelopedbyfailureoftheRCICSystemasdiscussedFSARSection5.4.6.2.5.4.Similarly,thismodificationdoesnotcreatethepossibilityofamalfunctionofadifferenttypethananyevaluatedpreviouslyintheFSAR.AsstatedabovethenewlyinstalledelectricalcomponentsandcageplugonlyincreasethereliabilityoftheRCICSystemandhavenonegativeimpactonanyotherplantsystems.III.No.RCICSystemoperabilityisaddressedintheTechnicalSpecificationsinthePlantSystemsSection3/4.7.3andBasesSection3/4.7.3.ThismodificationhasnoimpactonRCICoperabilityasisdescribedinthesesections.InadditionRCICSystemactuationinstrumentationisaddressesintheTechnicalSpecificationsinInstrumentationSection3/4.3.5andBasesSection3/4.3.5.Thismodificationdoesnotinvolveorimpactinanywaythisinstrumentation.

/ERIN.:91-226RREFEE:DCP91-9079,Rev.0DERTPTIFHANE:Replacethefirstbutt-weldedelbowonthe4"recirculationlinedirectlyoffeachLRWcollectiontankwithflangedelbowstoalloweasyaccesstothepipingclosetoandinsideeachtankforcleaning.~i/MARY:I.No.ThismodificationdoesnotalterthedesignbasisoroperationasdescribedwithinFSARsection11.2.1,"LiquidWasteManagementSystems".Replacingthebutt-weldedelbowfittingwithaflangedelbowoneachoftheLRWcollectiontankscreatesnochangetosystemoperationorfunction.ThepossibilityofapiperupturehasbeenevaluatedagainsttheAccidentAnalysesinChapter15oftheFSAR,specificallysection15.7.2and15.7.3,SincethecomponentsaffectedbythischangewillcomplywiththeoriginalANSIpipingcodethereisnodecreasetothedesignintegrityofthesystem.H.No.~~ImplementationofthismodificationwillnotchangethenormaloperationoftheLiquidRadwasteManagementSystems,specificallytheliquidradwasteprocessingsubsystem.Thesystemwillcontinuetooperateinaccordancewithitsoriginaldesignbases,andthepipingmodificationtotheelbowscomplieswiththeoriginalconstructioncodes(ANSIB31.1).III.No.TheflangesinstalledperthismodificationwillenhancetheLiquidWasteManagementSystembyprovidingeasyaccesstorecirc.pipingbutinnowayaffectssystemoperabilityand/orradioactivematerialreleaseratesasdescribedinTechnicalSpecification3/4.11.1.

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