ML17331A026

Proposed TS 3/4.7.9 Re Fire Suppression Water Sys & TS 4.7.9.1.1 Re SR for Fire Suppression Water Sys

ML17331A026
Person / Time
Site:	Cook
Issue date:	01/27/1993
From:	INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
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ML17331A025	List: ML17331A024 ML17331A026
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NUDOCS 9302020075
Download: ML17331A026 (26)

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AttachmenttoAEP:NRC:0692CLDonaldC.CookNuclearPlantUnits1and2TechnicalSpecifications9302020075930127'PDRADOCK050003i5PPDRj

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PLANTSYSTEMS34.7.9FIRESUPPRESSIONSYSTEMSFIRESUPPRESSIONWATERSYSTEMLIMITINGCONDITIONFOROPERATION3.7.9.1ThefiresuppressionwatersystemshallbeconsideredtobeOPERABLEwith:a.Threefiresuppressionsystempumps,'achwithacapacityof2500gpm,withtheirdischargealignedtothefiresuppressionheader,b.Twofirewatertanks,'achwithaminimumusablevolumeof565,000gallons(34.0feetlevelindication).CeAnOPERABLEflowpathcapableoftakingsuctionfromeitheroneofthefirewatertanksandtransferringthewaterthroughdistributionpiping(withOPERABLEsectionalizingvalves)uptotheyardhydrantcurbcontrolvalves,tothehosestationvalve(s)andwatersuppressionsystemcontrollingvalve(s).Thehosestationvalve(s)andthewatersuppressionsystemcontrollingvalve(s)thatarerequiredtobein.theflowpatharegiveninSpecifications3.7.9.5and3.7.9.2,respectively.APPLICABILITY:Atalltimes.ACTION:a.Withonepumpinoperable,restoretheinoperablepumptoOPERABLEstatuswithin7daysorprovideanalternatebackuppump.b.Withonefirewatertankinoperable,restoretheinoperabletanktoOPERABLEstatuswithin30daysorestablishabackupwatersystemsupply.ceWiththefiresuppressionwatersystemotherwiseinoperable:1.RestorethefiresuppressionwaterdistributionsystemtoOPERABLEstatuswithin24hours,or2.Establishabackupfiresuppressionwatersystemwithin24hours.d,TheprovisionsofSpecifications3.0.3and3.0.4arenotapplicable.+ThesepumpsandtanksaresharedbetweenUnits1and2.COOKNUCLEARPLANT-UNIT13/47-41AMENDMENTNO.

PLANTSYSTEMSSURVEILLANCEREUIREMENTS4'.9.1.1Thefiresuppression~atersystemshallbedemonstratedOPERABLE:a.Atleastonceper7daysbyverifyingthewatersupplycontainedinthefirewatertanks.Atleastonceper31daysonaSTAGGEREDTESTBASISbystartingeachpumpandoperatingitforatleast15minutesonrecirculationflow.c~Atleastonceper31daysbyverifyingthateachvalve(manual,poweroperated,orautomatic)intheflowpaththatisnotlocked,sealed,orotherwisesecuredinposition,isinitscorrectposition.d.Atleastonceper6monthsbyperformanceofasystemflushofabovegroundinternaldistributionheadersandfirehydrants.e.Atleastonceper12monthsbycyclingeachtestablevalveintheflowpaththroughatleastonecompletecycleoffulltravel.Atleastonceper18monthsbyperformingasystemfunctionaltest.whichincludessimulatedautomaticactuationofthesystemthroughoutitsoperatingsequence,and:1.Verifyingthateachautomaticvalveintheflowpathactuatestoitscorrectposition,2.Verifyingthateachpumpdevelopsaflowofatleast2500gpmatasystemheadofatleast300feetofwaterbyobservingthreepoints(minimum,rated,andpeak)onthepump'sperformancecurve,3.Cyclingeachvalveintheflowpaththatisnottestableduringplantoperationthroughatleastonecompletecycleoffulltravel,and4.Verifyingthateachpumpstartsinitspreplannedsequencetomaintainthefiresuppressionwatersystempressuregreaterthanorequalto100psig.goAtleastonceper3yearsbyperformingaseriesofflowtestssothateveryfiremainsegment(excludingindividualsystemsupplies)hasbeenverifiedtobeclearofobstructionbyafullflowtest.COOKNUCLEARPLANT-UNIT13/47-42AMENDMENTNO.

PLANTSYSTEMSSURVEILLANCEREUIREMENTSContinued4,7.9.1.2ThefirepumpdieselenginesshallbedemonstratedOPERABLE:a.Atleastonceper31daysbyverifying:1.Thefuelstoragetankscontainatleast160gallonsoffuel,and2.Thedieselsstartfromambientconditionsandoperateforatleast30minutes.b.Atleastonceper92daysbyverifyingthatasampleofdieselfuelfromthefuelstoragetanksobtainedinaccordancewithASTM-D4057-81iswithintheacceptablelimitsspecifiedinTable1ofASTM-D975-81whencheckedforviscosity,waterandsediment.coAtleastonceper18monthsbysubjectingthedieselstoaninspectioninaccordancewithprocedurespreparedinconjunctionwiththemanufacturer'srecommendationsforthisclassofstandbyservice.4.7,9.1.3ThefirepumpdieselstartingbatterybanksandchargersshallbedemonstratedOPERABLE:a.Atleastonceper7daysbyverifyingthat;1.Theelectrolytelevelofeachbatteryisabovetheplates,and2.Theoutputbatteryvoltageofeachbankisgreaterthan24volts.b.Atleastonceper92daysbyverifyingthatthespecificgravityisappropriateforcontinuedserviceofeachbattery.coAtleastonceper18monthsbyverifyingthat:1.Thebatteries,cellplatesandbatterypacksshownovisualindicationofphysicaldamageorabnormaldeterioration,and2.Thebattery-to-batteryandterminalconnectionsareclean,tight,freeofcorrosion,andcoatedwithanti-corrosionmaterial.COOKNUCLEARPLANT-UNIT13/47-43AMENDMENTNO.

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BASES34.7.9FIRESUPPRESSIONSYSTEMSTheOPERABILITYofthefiresuppressionsystemsensuresthatadequatefiresuppressioncapabilityisavailabletoconfineandextinguishfiresoccurringinanyportionofthefacilitywheresafetyrelatedequipmentislocated.Thefiresuppressionsystemsconsistofthewatersystem,sprayand/orsprinklers,CO,Halonandfirehosestations.Thecollectivecapabilityofthefiresuppressionsystemsisadequatetominimizepotentialdamagetosafety-relatedequipmentandisamajorelementinthefacilityfireprotectionprogram.IntheeventthatoneormoreC02suppressionsystemsrequiringautomaticactuationmustbeisolatedforpersonalprotectiontopermitentryforroutinetours,maintenance,construction,orsurveillancetestingintheprotectedarea,thefiredetectionsystem(s)requiredtobeOPERABLEbySpecification3.3.3.7shallbeverifiedtobeOPERABLE.IsolationofanautomaticC02suppressionsystemtemporarilyputsthissysteminamanualactuationmode.Relianceonthefiredetectionsystem,inconjunctionwiththeabilitytomanuallydischargetheCOsuppressionsystemwillprovideadequatefireprotectionforperiodswhenpersonnelarerequiredtoworkintheseareas.Intheeventthatportionsofthefiresuppressionsystemsareinoperable,alternatebackupfirefightingequipmentisrequiredtobemadeavailableintheaffectedareasuntiltheinoperableequipmentisrestoredtoservice.Whentheinoperablefirefightingequipmentisintendedforuseasabackupmeansoffiresuppression,alongerperiodoftimeisallowedtoprovideanalternatemeansoffirefightingthaniftheinoperableequipmentistheprimarymeansoffiresuppression.Backupfireprotectionequipmentwillnormallytak'etheformofpermanentlymountedfireextinguishersand/orfirehosestationsinornearthearea,orfirehosesroutedtotheaffectedarea.Intheeventthatthefirewatertanksbecomeinoperable,LakeMichiganmayserveastheirbackup.Twomanual,diesel-enginedriven,vertical-turbinefirepumpsratedat2000gpm,whichtakesuctionoffofLakeMichiganandprovidewatertothefiresuppressionheader,areadministrativelycontrolled,Oneofthesepumpsmayserveasabackuptooneofthefiresuppressionpumpsthattakesuctionoffofthetanks.However,itisnotourintenttorelyonbackupsystemsorothercompensatorymeasuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperableportionsofthefiresuppressionsystemtoOPERABLEstatuswithinareasonableperiod.ThesurveillancerequirementsprovideassurancethattheminimumOPERABILITYrequirementsofthefiresuppressionsystemsaremet.Whileperformingthesurveillancesspecifiedin4.7.9.1thefiresuppressionwatersystemisstillcapableofperformingitsintendedfunction.Consequently,itisnotnecessarytoentertheACTIONSTATEMENTspecifiedin3.7.9.1whiletheSURVEILLANCESspecifiedin4.7.9.1.1arebeingperformed,unlessthetestedequipmentfailstheSURVEILLANCE.Inaddition,anallowanceismadeforensuringasufficientvolumeofHalonandCOiintheHalonandCOistoragetanksbyverifyingeithertheweight,level,orpressureofthetanks.COOKNUCLEARPLANT-UNIT1B3/47-7AMENDMENTNO68"')gg8I 1tr*VaVSatPlIfI!

BASES34.4.7.9ContinuedThefiresuppressionwatersystemhasthreefirepumpscommontobothunitswhichdischargeintoundergroundringheaders,Thereisonemotor-drivenhorizontalcentrifugalfirepumpratedat2500gpmthattakessuctionfromthefirewaterstoragetanks;andtwodiesel-engine-drivenhorizontalcentrifugalfirepumpsratedat2500gpmthattakesuctionfromthefirewaterstoragetanks.Havingacombinationofdiesel-drivenandelectricmotor-drivenpumpsinthesystemdesignisconsistentwithNRCBranchTechnicalPositionAPSCB9.5-1.TheflowpathscapableoftakingsuctionfromLakeMichiganarenormallyisolatedtoprecludezebramusselinfestationofthesystem.ThepurposeofthecharcoalfilterfiresuppressionT/Sistoaccountfordetectionandsuppressionoffiresinthecharcoalfilters.Manualoperationofthesesystemsisallowedbecausetwo-pointheatdetectionwithcontrolroomandlocalannunciationoftroubleconditionsisprovidedforthecharcoalfilters.TheOPERABILITYofthefiresuppressionsystemprotectingthecharcoalfiltersisonlyrequiredwhenthereischarcoalinthefilters.Actuationofspraywaterontothecharcoalfiltersrequiresboththemanualopeningofthesystemisolationvalveandreachingthehightemperaturealarmsetpointfortheautomaticopeningofthesystemdelugevalve.BecauseoftheinaccessibilityofthelowercontainmenttopersonnelduringoperationduetoALARAradiationexposureconcerns,theuseofoneormoreCCTVsinthelowercontainment,tomonitorforfireandsmoke,isanacceptablesubstitutetoanhourlyfirewatch,ifthefiresuppressionsystembecomesinoperable.Allhourlyfirewatchpatrolsareperformedatintervalsofsixtyminuteswithamarginoffifteenminutes.Acontinuousfirewatchrequiresthatatrainedindividualbeinthespecifiedareaatalltimesandthateachfirezonewithinthespecifiedareabepatrolledatleastonceeveryfifteenminuteswithamarginoffiveminutes.COOKNUCLEARPLANT-UNIT1B3/47-8AMENDMENTNO,480,484 4."ttr~~IIJv BASES34.7.9ContinuedAcontrolvalveisdefinedasavalvethatwhencloseddoesnotleaveanalternateopenflowpathtoasystem.Asectionalizingvalveisdefinedasavalvethatwhencloseddoesnotpreventanalternateopenflowpathtoasystemandhencedoesnotmakethefiresuppressionwatersysteminoperable.Undercertainsituations,theclosureofasectionalizingvalvefollowedbytheclosureofasecondvalvewillnotleaveanopenflowpathtooneofthespecifiedsystems.Inthisinstance,ActionStatementcofSpecification3.7.9.1isapplicable.ManualactuationofCOfiresuppressionsystemsprovidesadequatefireprotectionfortheprospectedareasbasedonOPERABLEfiredetectioninthearea,lowcombustibleloadings,andpromptfirebrigaderesponsetoalarms.ManyoftheActionStatementstakecreditforOPERABLEfiredetectioninlieuofafirewatchwhenafireprotectionsystemisinoperable.OPERABLEfiredetectionprovidessufficientearlywarningcapabilityofafiretotheappropriateControlRoom.DuringSurveillanceTestingofaLowPressureCOSystemwiththesysteminoperable,therequirementforacontinuousfirewatchmaybesuspendedduringportionsofthetestwhichresultormayresultinadischargeintotheCOprotectedarea.Similarly,ifaCOactuationoccurswhichresultsintheneedtohavetheLowPressureC02Systemmadeinoperable,therequirementforacontinuousfirewatchmaybesuspended.Ineithercase,theareaaffectedshallberestoredtohabitabilityassoonaspracticable,afterwhichthecontinuousfirewatchistobere-establishedifthesystemisstillinoperable.34.7.10FIRERATEDASSEMBLIESTheOPERABILITYofthefirebarriersandbarrierpenetrationsensurethatfiredamagewillbelimited.Thesedesignfeaturesminimizethepossibilityofasinglefireinvolvingmorethanonefireareapriortodetectionandextinguishment.ThefirebarriersandfirebarrierpenetrationsealingdevicesareperiodicallyinspectedtoverifytheirOPERABILITY.Thefunctionaltestingofthefiredampersisprovidedtoensurethatthedampersremainfunctional.Theventilationsealsareasealsaroundventilationductworkpenetratingfirebarriers.ItisnotourintenttorelyonbackupsystemsorothercompensatorymeasuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperableportionsofthefireratedassemblytoOPERABLEstatuswithinareasonableperiod.ForthepurposeofdeterminingOPERABILITY,anOPERABLEfireratedassemblyand/orsealingdeviceisonethatiscapableofperformingitsintendedsafetyfunction.COOKNUCLEARPLANT-UNIT1B3/47-9AMENDMENTNO,480, f~,014-IkkII~$IIII,I4h,A PLANTSYSTEMS34.7.9PIRESUPPRESSIONSYSTEMSPIRESUPPRESSIONWATERSYSTEMLIMITINGCONDITIONFOROPERATION3,7.9.1ThefiresuppressionwatersystemshallbeconsideredtobeOPERABLEwith:a.Threefiresuppressionsystempumps,'achwithacapacityof2500gpm,withtheirdischargealignedtothefiresuppressionheader,b.Twofirewatertanks,eachwithaminimumusablevolumeof565,000gallons.(34.0feetlevelindication)c~AnOPERABLEflowpathcapableoftakingsuctionfromeitheroneofthefirewatertanksandtransferringthewaterthroughdistributionpiping(withOPERABLEsectionalizingvalves)uptotheyardhydrantcurbcontrolvalves,tothehosestationvalve(s)andwatersuppressionsystemcontrollingvalve(s).Thehosestationvalve(s)andthewatersuppressionsystemcontrollingvalve(s)thatarerequiredtobeintheflowpatharegiveninSpecifications3.7.9.5and3.7.9.2,respectively.APPLICABILITY:Atalltimes.ACTION:a.Withonepumpinoperable,restoretheinoperablepumptoOPERABLEstatuswithin7daysorprovideanalternatebackuppump.b.Withonefirewatertankinoperable,restoretheinoperabletanktoOPERABLEstatuswithin30daysorestablishabackupwatersystemsupply.c>>Withthefiresuppressionwatersystemotherwiseinoperable:1.RestorethefiresuppressionwaterdistributionsystemtoOPERABLEstatuswithin24hours,or2.Establishabackupfiresuppressionwatersystemwithin24hours.d.TheprovisionsofSpecifications3.0.3and3.0.4arenotapplicable.+ThesepumpsandtanksaresharedbetweenUnits1and2.COOKNUCLEARPLANT-UNIT23/47-36AMENDMENTNO.

C.PI~~Vyal PLANTSYSTEMSSURVEILLANCEREUIREMENTS4.7.9.1.1ThefiresuppressionwatersystemshallbedemonstratedOPERABLE:a.Atleastonceper7daysbyverifyingthewatersupplycontainedinthefirewatertanks.b.Atleastonceper31daysonaSTAGGEREDTESTBASISbystartingeachpumpandoperatingitforatleast15minutesonrecirculationflow.c~Atleastonceper31daysbyverifyingthateachvalve(manual,poweroperated,orautomatic)intheflowpaththatisnotlocked,sealed,orotherwisesecuredinposition,isinitscorrectposition.d.Atleastonceper6monthsbyperformanceofasystemflushofabovegroundinternaldistributionheadersandfirehydrants.e.Atleastonceper12monthsbycyclingeachtestablevalveintheflowpaththroughatleastonecompletecycleoffulltravel.Atleastonceper18monthsbyperformingasystemfunctionaltestwhichincludessimulatedautomaticactuationofthesystemthroughoutitsoperatingsequence,and:1.Verifyingthateachautomaticvalveintheflowpathactuatestoitscorrectposition,2.Verifyingthateachpumpdevelopsaflowofatleast2500gpmatasystemheadofatleast300feetofwaterbyobservingthreepoints(minimum,rated,andpeak)onthepump'sperformancecurve,3.Cyclingeachvalveintheflowpaththatisnottestableduringplantoperationthroughatleastonecompletecycleoffulltravel,and4.Verifyingthateachpumpstartsinitspreplannedsequencetomaintainthefiresuppressionwatersystempressuregreaterthanorequalto100psig.goAtleastonceper3yearsbyperformingaseriesofflowtestssothateveryfiremainsegment(excludingindividualsystemsupplies)hasbeenverifiedtobeclearofobstructionbyafullflowtest.COOKNUCLEARPLANT-UNIT23/47-37AMENDMENTNO.44,445

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PLANTSYSTEMSSURVEILLANCEREUIREMENTSContinued4.7.9.1.2ThefirepumpdieselenginesshallbedemonstratedOPERABLE:a.Atleastonceper31daysbyverifying:1,Thefuelstoragetankscontainatleast160gallonsoffuel,and2.Thedieselsstartfromambientconditionsandoperateforatleast30minutes.b.Atleastonceper92daysbyverifyingthatasampleofdieselfuelfromthefuelstoragetanksobtainedinaccordancewithASTM-D4057-81iswithintheacceptablelimitsspecifiedinTable1ofASTM-D975-81whencheckedforviscosity,waterandsediment.c>>Atleastonceper18monthsbysubjectingthedieselstoaninspectioninaccordancewithprocedurespreparedinconjunctionwiththemanufacturer'srecommendationsforthisclassofstandbyservice.4.7.9.1.3ThefirepumpdieselstartingbatterybanksandchargersshallbedemonstratedOPERABLE:a.Atleastonceper7daysbyverifyingthat:1.Theelectrolytelevelofeachbatteryisabovetheplates,and2.Theoutputbatteryvoltageofeachbankisgreaterthan24volts.b.Atleastonceper92daysbyverifyingthatthespecificgravityisappropriateforcontinuedserviceofeachbattery.c~Atleastonceper18monthsbyverifyingthat:1.Thebatteries,cellplatesandbatterypacksshownovisualindicationofphysicaldamageorabnormaldeterioration,and2.Thebattery-to-batteryandterminalconnectionsareclean,tight,freeofcorrosion,andcoatedwithanti-corrosionmaterial.COOKNUCLEARPLANT-UNIT23/47-38AMENDMENTNO.44,,'I ek1llItL~J'y)'I~l\~

PLANTSYSTEMSBASESTheservicelifeofasnubberisevaluatedviamanufacturer'sinputandinformationthroughconsiderationofthesnubberserviceconditionsandassociatedinstallationandmaintenancerecords(newlyinstalledsnubber,sealreplaced,springreplaced,inhighradiationarea,inhightemperaturearea,etc...).Therequirementtomonitorthesnubberservicelifeisincludedtoensurethatthesnubbersperiodicallyundergoaperformanceevaluationinviewoftheirageandoperatingconditions.Theserecordswillprovidestatisticalbasesforfutureconsiderationofsnubberservicelife.Therequirementsforthemaintenanceofrecordsandthesnubberservicelifereviewarenotintendedtoaffectplantoperation.Thenumberofsnubberstobefunctionallytestedduringeachsurveillanceisbasedoncalculationsperformedtoallowextensionofthesurveillanceintervalfrom18monthsto24months,andtherefore,thenumberofsnubbersfunctionallytesteddeviatesfromthenumberrequiredbytheWestinghouseStandardTechnicalSpecifications(NUREG-0452,Revision4).34.7.8SEALEDSOURCECONTAMINATIONThelimitationsonremovablecontaminationforsourcesrequiringleaktesting,includingalphaemitters,isbasedon10CPR70.39(c)limitsforplutonium.Thislimitationwillensurethatleakagefrombyproduct,source,andspecialnuclearmaterialsourceswillnotexceedallowableintakevalues.34.7.9PIRESUPPRESSIONSYSTEMSTheOPERABILITYofthefiresuppressionsystemsensuresthatadequatefiresuppressioncapabilityisavailabletoconfineandextinguishfiresoccurringinanyportionofthefacilitywheresafety-relatedequipmentislocated.Thefiresuppressionsystemconsistsofthewatersystem,sprayand/orsprinklers,CO2,halonandfirehosestations.Thecollectivecapabilityofthefiresuppressionsystemsisadequatetominimizepotentialdamagetosafety-relatedequipmentandisamajorelementinthefacilityfireprotectionprogram.IntheeventthatoneormoreC02suppressionsystemsrequiringautomaticactuationmustbeisolatedforpersonalprotectiontopermitentryforroutinetours,maintenance,construction,orsurveillancetestingintheprotectedarea,thefiredetectionsystem(s)requiredtobeOPERABLEbySpecification3.3.3.7shallbeverifiedtobeOPERABLE.IsolationofanautomaticC02suppressionsyst:emtemporarilyputsthissysteminamanualactuationmode.Relianceonthefiredetectionsystem,inconjunctionwiththeabilitytomanuallydischargetheCOsuppressionsystem,willprovideadequatefireprotectionforperiodswhenpersonnelarerequiredtoworkintheseareas,COOKNUCLEARPLANT-UNIT2B3/47-6AMENDMENTNO.6k,

'I~4 PLANTSYSTEMSBASES34.7.9ContinuedIntheeventthatportionsofthefiresuppressionsystemsareinoperable,alternatebackupfirefightingequipmentisrequiredtobemadeavailableintheaffectedareasuntiltheinoperableequipmentisrestoredtoservice.Whentheinoperablefire-fightingequipmentisintendedforuseasabackupmeansoffiresuppression,alongerperiodoftimeisallowedtoprovideanalternatemeansoffirefightingthaniftheinoperableequipmentistheprimarymeansoffiresuppression.Backupfireprotectionequipmentwillnormallytaketheformofpermanentlymountedfireextinguishersand/orfirehosestationsinornearthearea,orfirehosesroutedtotheaffectedarea.Intheeventthatthefirewatertanksbecomeinoperable,LakeMichiganmayserveastheirbackup.Twomanual,diesel-enginedriven,vertical-turbinefirepumpsratedat2000gpm,whichtakesuctionoffofLakeMichiganandprovidewatertothefiresuppressionheader,areadministrativelycontrolled.Oneofthesepumpsmayserveasabackuptooneofthefiresuppressionpumpsthattakesuctionoffofthetanks.However,itisnotourintenttorelyonbackupsystemsorothercompensatorymeasuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperableportionsofthefiresuppressionsystemtoOPERABLEstatuswithinareasonableperiod.ThesurveillancerequirementsprovideassurancethattheminimumOPERABILITYrequirementsofthefiresuppressionsystemsaremet.Whileperformingthesurveillancesspecifiedin4.7.9.1.1thefiresuppressionwatersystemisstillcapableofperformingitsintendedfunction.Consequently,itisnotnecessarytoentertheACTIONSTATEMENTspecifiedin3.7.9.1whiletheSURVEILLANCESspecifiedin4.7.9.1.1arebeingperformed,unlessthetestedequipmentfailstheSURVEILLANCE.Inaddition,anallowanceismadeforensuringasufficientvolumeofHalonandC02intheHalonandC02storagetanksbyverifyingeithertheweight,level,orpressureofthetanks.Thefiresuppressionwatersystemhasthreefirepumpscommontobothunitswhichdischargeintoundergroundringheaders.Thereisonemotor-drivenhorizontalcentrifugalfirepumpratedat2500gpmthattakessuctionfromthefirewaterstoragetanks;andtwodiesel-engine-drivenhorizontalcentrifugalfirepumpsratedat2500gpmthattakesuctionfromthefirewaterstoragetanks.Havingacombinationofdiesel-drivenandelectric-motor-drivenpumpsinthesystemdesignisconsistentwithNRCBranchTechnicalPositionAPSCB9'-1.TheflowpathscapableoftakingsuctionfromLakeMichiganarenormallyisolatedtoprecludezebramusselinfestationofthesystem.COOKNUCLEARPLANT-UNIT2B3/47-7AMENDMENTNO.

43PC-II BASES34.7.9ContinuedThepurposeofthecharcoalfilterfiresuppressionT/Sistoaccountfordetectionandsuppressionoffiresinthecharcoalfilters.Manualoperationofthesesystemsisallowedbecausetwo-pointheatdetectionwithcontrolroomandlocalannunciationoftroubleconditionsisprovidedforthecharcoalfilters.TheOPERABILITYofthefiresuppressionsystemprotectingthecharcoalfiltersisonlyrequiredwhenthereischarcoalinthefilters.Actuationofspraywaterontothecharcoalfiltersrequiresboththemanualopeningofthesystemisolationvalveandreachingthehightemperaturealarmsetpointfortheautomaticopeningofthesystemdelugevalve.BecauseoftheinaccessibilityofthelowercontainmenttopersonnelduringoperationduetoALARAradiationexposureconcerns,theuseofoneormoreCCTVsinthelowercontainment,tomonitorforfireandsmoke,isanacceptablesubstitutetoacontinuousfirewatch,ifthefiresuppressionsystembecomesinoperable.Allhourlyfirewatchpatrolsareperformedatintervalsofsixtyminuteswithamarginoffifteenminutes.Acontinuousfirewatchrequiresthatatrainedindividualbeinthespecifiedareaatalltimesandthateachfirezonewithinthespecifiedareabepatrolledatleastonceeveryfifteenminuteswithamarginoffiveminutes.Acontrolvalveisdefinedasavalvethatwhencloseddoesnotleaveanalternateopenflowpathtoasystem,Asectionalizingvalveisdefinedasavalvethatwhencloseddoesnotpreventanalternateopenflowpathtoasystemandhencedoesnotmakethefiresuppressionwatersysteminoperable.Undercertainsituations,theclosureofasectionalizingvalvefollowedbytheclosureofasecondvalvewillnotleaveanopenflowpathtooneofthespecifiedsystems.Inthisinstance,ActionStatementcofSpecification3.7.9.1isapplicable.ManualactuationofCOfiresuppressionsystemsprovidesadequatefireprotectionfortheprotectedareasbasedonoperablefiredetectioninthearea,lowcombustibleloadings,andpromptfirebrigaderesponsetoalarms.COOKNUCLEARPLANT-UNIT2B3/47-8AMENDMENTNO.4k, I1h4'P,P'14I&rl' BASES34.7.9ContinuedManyoftheActionStatementstakecreditforOPERABLEfiredetectioninlieuofafirewatchwhenafireprotectionsystemisinoperable.OPERABLEfiredetectionprovidessufficientearlywarningcapabilityofafiretotheappropriateControlRoom.DuringSurveillanceTestingofaLowPressureCOSystemwiththesysteminoperable,therequirementforacontinuousfirewatchmaybesuspendedduringportionsofthetestwhichresultormayresultinadischargeintotheCOprotectedarea.Similarly,ifaC02actuationoccurswhichresultsintheneedtohavetheLowPressureCOSystemmadeinoperable,therequirementforacontinuousfirewatchmaybesuspended.Ineithercase,theareaaffectedshallberestoredtohabitabilityassoonaspracticable,afterwhichthecontinuousfirewatchistobere-establishedifthesystemisstillinoperable.34.7.10FIRERATEDASSEMBLIESTheOPERABILITYofthefirebarriersandbarrierpenetrationse'nsuresthatfiredamagewillbelimited.Thesedesignfeaturesminimizethepossibilityofasinglefireinvolvingmorethanonefireareapriortodetectionandextinguishment.ThefirebarriersandfirebarrierpenetrationsealingdevicesareperiodicallyinspectedtoverifytheirOPERABILITY.Thefunctionaltestingofthefiredampersisprovidedtoensurethatthedampersremainfunctional.Theventilationsealsaresealsaroundventilationductworkpenetratingfirebarriers.ItisnotourintenttorelyonbackupsystemsorothercompensatorymeasuresforanextendedperiodoftimeandACTIONwillbetakentorestoretheinoperableportionsofthefireratedassemblytoOPERABLEstatuswithinareasonableperiod.ForthepurposeofdeterminingOPERABILITY,anOPERABLEfireratedassembly/sealingdeviceisonethatiscapableofperformingitsintendedsafetyfunction.COOKNUCLEARPLANT-UNIT2B3/47-9AMENDMENTNO.July15,1986BasesClarification