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
To:
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ML17331A025	List: ML17331A024 ML17331A026
References
NUDOCS 9302020075
Download: ML17331A026 (26)

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Attachment toAEP:NRC:0692CL DonaldC.CookNuclearPlantUnits1and2Technical Specifications 9302020075 930127'PDRADOCK050003i5PPDRj

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PLANTSYSTEMS34.7.9FIRESUPPRESSION SYSTEMSFIRESUPPRESSION WATERSYSTEMLIMITINGCONDITION FOROPERATION 3.7.9.1Thefiresuppression watersystemshallbeconsidered tobeOPERABLEwith:a.Threefiresuppression systempumps,'achwithacapacityof2500gpm,withtheirdischarge alignedtothefiresuppression header,b.Twofirewatertanks,'achwithaminimumusablevolumeof565,000gallons(34.0feetlevelindication).

CeAnOPERABLEflowpathcapableoftakingsuctionfromeitheroneofthefirewatertanksandtransferring thewaterthroughdistribution piping(withOPERABLEsectionalizing valves)uptotheyardhydrantcurbcontrolvalves,tothehosestationvalve(s)andwatersuppression systemcontrolling valve(s).

Thehosestationvalve(s)andthewatersuppression systemcontrolling valve(s)thatarerequiredtobein.theflowpatharegiveninSpecifications 3.7.9.5and3.7.9.2,respectively.

APPLICABILITY:

Atalltimes.ACTION:a.Withonepumpinoperable, restoretheinoperable pumptoOPERABLEstatuswithin7daysorprovideanalternate backuppump.b.Withonefirewatertankinoperable, restoretheinoperable tanktoOPERABLEstatuswithin30daysorestablish abackupwatersystemsupply.ceWiththefiresuppression watersystemotherwise inoperable:

1.Restorethefiresuppression waterdistribution systemtoOPERABLEstatuswithin24hours,or2.Establish abackupfiresuppression watersystemwithin24hours.d,Theprovisions ofSpecifications 3.0.3and3.0.4arenotapplicable.

+ThesepumpsandtanksaresharedbetweenUnits1and2.COOKNUCLEARPLANT-UNIT13/47-41AMENDMENT NO.

PLANTSYSTEMSSURVEILLANCE REUIREMENTS 4'.9.1.1Thefiresuppression

~atersystemshallbedemonstrated OPERABLE:

a.Atleastonceper7daysbyverifying thewatersupplycontained inthefirewatertanks.Atleastonceper31daysonaSTAGGERED TESTBASISbystartingeachpumpandoperating itforatleast15minutesonrecirculation flow.c~Atleastonceper31daysbyverifying thateachvalve(manual,poweroperated, orautomatic) intheflowpaththatisnotlocked,sealed,orotherwise securedinposition, isinitscorrectposition.

d.Atleastonceper6monthsbyperformance ofasystemflushofabovegroundinternaldistribution headersandfirehydrants.

e.Atleastonceper12monthsbycyclingeachtestablevalveintheflowpaththroughatleastonecompletecycleoffulltravel.Atleastonceper18monthsbyperforming asystemfunctional test.whichincludessimulated automatic actuation ofthesystemthroughout itsoperating

sequence, and:1.Verifying thateachautomatic valveintheflowpathactuatestoitscorrectposition, 2.Verifying thateachpumpdevelopsaflowofatleast2500gpmatasystemheadofatleast300feetofwaterbyobserving threepoints(minimum, rated,andpeak)onthepump'sperformance curve,3.Cyclingeachvalveintheflowpaththatisnottestableduringplantoperation throughatleastonecompletecycleoffulltravel,and4.Verifying thateachpumpstartsinitspreplanned sequencetomaintainthefiresuppression watersystempressuregreaterthanorequalto100psig.goAtleastonceper3yearsbyperforming aseriesofflowtestssothateveryfiremainsegment(excluding individual systemsupplies) hasbeenverifiedtobeclearofobstruction byafullflowtest.COOKNUCLEARPLANT-UNIT13/47-42AMENDMENT NO.

PLANTSYSTEMSSURVEILLANCE REUIREMENTS Continued 4,7.9.1.2 Thefirepumpdieselenginesshallbedemonstrated OPERABLE:

a.Atleastonceper31daysbyverifying:

1.Thefuelstoragetankscontainatleast160gallonsoffuel,and2.Thedieselsstartfromambientconditions andoperateforatleast30minutes.b.Atleastonceper92daysbyverifying thatasampleofdieselfuelfromthefuelstoragetanksobtainedinaccordance withASTM-D4057-81iswithintheacceptable limitsspecified inTable1ofASTM-D975-81whencheckedforviscosity, waterandsediment.

coAtleastonceper18monthsbysubjecting thedieselstoaninspection inaccordance withprocedures preparedinconjunction withthemanufacturer's recommendations forthisclassofstandbyservice.4.7,9.1.3 Thefirepumpdieselstartingbatterybanksandchargersshallbedemonstrated OPERABLE:

a.Atleastonceper7daysbyverifying that;1.Theelectrolyte levelofeachbatteryisabovetheplates,and2.Theoutputbatteryvoltageofeachbankisgreaterthan24volts.b.Atleastonceper92daysbyverifying thatthespecificgravityisappropriate forcontinued serviceofeachbattery.coAtleastonceper18monthsbyverifying that:1.Thebatteries, cellplatesandbatterypacksshownovisualindication ofphysicaldamageorabnormaldeterioration, and2.Thebattery-to-battery andterminalconnections areclean,tight,freeofcorrosion, andcoatedwithanti-corrosion material.

COOKNUCLEARPLANT-UNIT13/47-43AMENDMENT NO.

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BASES34.7.9FIRESUPPRESSION SYSTEMSTheOPERABILITY ofthefiresuppression systemsensuresthatadequatefiresuppression capability isavailable toconfineandextinguish firesoccurring inanyportionofthefacilitywheresafetyrelatedequipment islocated.Thefiresuppression systemsconsistofthewatersystem,sprayand/orsprinklers, CO,Halonandfirehosestations.

Thecollective capability ofthefiresuppression systemsisadequatetominimizepotential damagetosafety-related equipment andisamajorelementinthefacilityfireprotection program.IntheeventthatoneormoreC02suppression systemsrequiring automatic actuation mustbeisolatedforpersonalprotection topermitentryforroutinetours,maintenance, construction, orsurveillance testingintheprotected area,thefiredetection system(s) requiredtobeOPERABLEbySpecification 3.3.3.7shallbeverifiedtobeOPERABLE.

Isolation ofanautomatic C02suppression systemtemporarily putsthissysteminamanualactuation mode.Relianceonthefiredetection system,inconjunction withtheabilitytomanuallydischarge theCOsuppression systemwillprovideadequatefireprotection forperiodswhenpersonnel arerequiredtoworkintheseareas.Intheeventthatportionsofthefiresuppression systemsareinoperable, alternate backupfirefightingequipment isrequiredtobemadeavailable intheaffectedareasuntiltheinoperable equipment isrestoredtoservice.Whentheinoperable firefightingequipment isintendedforuseasabackupmeansoffiresuppression, alongerperiodoftimeisallowedtoprovideanalternate meansoffirefightingthaniftheinoperable equipment istheprimarymeansoffiresuppression.

Backupfireprotection equipment willnormallytak'etheformofpermanently mountedfireextinguishers and/orfirehosestationsinornearthearea,orfirehosesroutedtotheaffectedarea.Intheeventthatthefirewatertanksbecomeinoperable, LakeMichiganmayserveastheirbackup.Twomanual,diesel-engine driven,vertical-turbine firepumpsratedat2000gpm,whichtakesuctionoffofLakeMichiganandprovidewatertothefiresuppression header,areadministratively controlled, Oneofthesepumpsmayserveasabackuptooneofthefiresuppression pumpsthattakesuctionoffofthetanks.However,itisnotourintenttorelyonbackupsystemsorothercompensatory measuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperable portionsofthefiresuppression systemtoOPERABLEstatuswithinareasonable period.Thesurveillance requirements provideassurance thattheminimumOPERABILITY requirements ofthefiresuppression systemsaremet.Whileperforming thesurveillances specified in4.7.9.1thefiresuppression watersystemisstillcapableofperforming itsintendedfunction.

Consequently, itisnotnecessary toentertheACTIONSTATEMENT specified in3.7.9.1whiletheSURVEILLANCES specified in4.7.9.1.1 arebeingperformed, unlessthetestedequipment failstheSURVEILLANCE.

Inaddition, anallowance ismadeforensuringasufficient volumeofHalonandCOiintheHalonandCOistoragetanksbyverifying eithertheweight,level,orpressureofthetanks.COOKNUCLEARPLANT-UNIT1B3/47-7AMENDMENT NO68"')gg8I 1tr*VaVSatPlIfI!

BASES34.4.7.9Continued Thefiresuppression watersystemhasthreefirepumpscommontobothunitswhichdischarge intounderground ringheaders,Thereisonemotor-driven horizontal centrifugal firepumpratedat2500gpmthattakessuctionfromthefirewaterstoragetanks;andtwodiesel-engine-driven horizontal centrifugal firepumpsratedat2500gpmthattakesuctionfromthefirewaterstoragetanks.Havingacombination ofdiesel-driven andelectricmotor-driven pumpsinthesystemdesignisconsistent withNRCBranchTechnical PositionAPSCB9.5-1.TheflowpathscapableoftakingsuctionfromLakeMichiganarenormallyisolatedtoprecludezebramusselinfestation ofthesystem.Thepurposeofthecharcoalfilterfiresuppression T/Sistoaccountfordetection andsuppression offiresinthecharcoalfilters.Manualoperation ofthesesystemsisallowedbecausetwo-point heatdetection withcontrolroomandlocalannunciation oftroubleconditions isprovidedforthecharcoalfilters.TheOPERABILITY ofthefiresuppression systemprotecting thecharcoalfiltersisonlyrequiredwhenthereischarcoalinthefilters.Actuation ofspraywaterontothecharcoalfiltersrequiresboththemanualopeningofthesystemisolation valveandreachingthehightemperature alarmsetpointfortheautomatic openingofthesystemdelugevalve.Becauseoftheinaccessibility ofthelowercontainment topersonnel duringoperation duetoALARAradiation exposureconcerns, theuseofoneormoreCCTVsinthelowercontainment, tomonitorforfireandsmoke,isanacceptable substitute toanhourlyfirewatch,ifthefiresuppression systembecomesinoperable.

Allhourlyfirewatchpatrolsareperformed atintervals ofsixtyminuteswithamarginoffifteenminutes.Acontinuous firewatchrequiresthatatrainedindividual beinthespecified areaatalltimesandthateachfirezonewithinthespecified areabepatrolled atleastonceeveryfifteenminuteswithamarginoffiveminutes.COOKNUCLEARPLANT-UNIT1B3/47-8AMENDMENT NO,480,484 4."ttr~~IIJv BASES34.7.9Continued Acontrolvalveisdefinedasavalvethatwhencloseddoesnotleaveanalternate openflowpathtoasystem.Asectionalizing valveisdefinedasavalvethatwhencloseddoesnotpreventanalternate openflowpathtoasystemandhencedoesnotmakethefiresuppression watersysteminoperable.

Undercertainsituations, theclosureofasectionalizing valvefollowedbytheclosureofasecondvalvewillnotleaveanopenflowpathtooneofthespecified systems.Inthisinstance, ActionStatement cofSpecification 3.7.9.1isapplicable.

Manualactuation ofCOfiresuppression systemsprovidesadequatefireprotection fortheprospected areasbasedonOPERABLEfiredetection inthearea,lowcombustible

loadings, andpromptfirebrigaderesponsetoalarms.ManyoftheActionStatements takecreditforOPERABLEfiredetection inlieuofafirewatchwhenafireprotection systemisinoperable.

OPERABLEfiredetection providessufficient earlywarningcapability ofafiretotheappropriate ControlRoom.DuringSurveillance TestingofaLowPressureCOSystemwiththesysteminoperable, therequirement foracontinuous firewatchmaybesuspended duringportionsofthetestwhichresultormayresultinadischarge intotheCOprotected area.Similarly, ifaCOactuation occurswhichresultsintheneedtohavetheLowPressureC02Systemmadeinoperable, therequirement foracontinuous firewatchmaybesuspended.

Ineithercase,theareaaffectedshallberestoredtohabitability assoonaspracticable, afterwhichthecontinuous firewatchistobere-established ifthesystemisstillinoperable.

34.7.10FIRERATEDASSEMBLIES TheOPERABILITY ofthefirebarriersandbarrierpenetrations ensurethatfiredamagewillbelimited.Thesedesignfeaturesminimizethepossibility ofasinglefireinvolving morethanonefireareapriortodetection andextinguishment.

Thefirebarriersandfirebarrierpenetration sealingdevicesareperiodically inspected toverifytheirOPERABILITY.

Thefunctional testingofthefiredampersisprovidedtoensurethatthedampersremainfunctional.

Theventilation sealsareasealsaroundventilation ductworkpenetrating firebarriers.

Itisnotourintenttorelyonbackupsystemsorothercompensatory measuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperable portionsofthefireratedassemblytoOPERABLEstatuswithinareasonable period.Forthepurposeofdetermining OPERABILITY, anOPERABLEfireratedassemblyand/orsealingdeviceisonethatiscapableofperforming itsintendedsafetyfunction.

COOKNUCLEARPLANT-UNIT1B3/47-9AMENDMENT NO,480, f~,014-IkkII~$IIII,I4h,A PLANTSYSTEMS34.7.9PIRESUPPRESSION SYSTEMSPIRESUPPRESSION WATERSYSTEMLIMITINGCONDITION FOROPERATION 3,7.9.1Thefiresuppression watersystemshallbeconsidered tobeOPERABLEwith:a.Threefiresuppression systempumps,'achwithacapacityof2500gpm,withtheirdischarge alignedtothefiresuppression header,b.Twofirewatertanks,eachwithaminimumusablevolumeof565,000gallons.(34.0feetlevelindication) c~AnOPERABLEflowpathcapableoftakingsuctionfromeitheroneofthefirewatertanksandtransferring thewaterthroughdistribution piping(withOPERABLEsectionalizing valves)uptotheyardhydrantcurbcontrolvalves,tothehosestationvalve(s)andwatersuppression systemcontrolling valve(s).

Thehosestationvalve(s)andthewatersuppression systemcontrolling valve(s)thatarerequiredtobeintheflowpatharegiveninSpecifications 3.7.9.5and3.7.9.2,respectively.

APPLICABILITY:

Atalltimes.ACTION:a.Withonepumpinoperable, restoretheinoperable pumptoOPERABLEstatuswithin7daysorprovideanalternate backuppump.b.Withonefirewatertankinoperable, restoretheinoperable tanktoOPERABLEstatuswithin30daysorestablish abackupwatersystemsupply.c>>Withthefiresuppression watersystemotherwise inoperable:

1.Restorethefiresuppression waterdistribution systemtoOPERABLEstatuswithin24hours,or2.Establish abackupfiresuppression watersystemwithin24hours.d.Theprovisions ofSpecifications 3.0.3and3.0.4arenotapplicable.

+ThesepumpsandtanksaresharedbetweenUnits1and2.COOKNUCLEARPLANT-UNIT23/47-36AMENDMENT NO.

C.PI~~Vyal PLANTSYSTEMSSURVEILLANCE REUIREMENTS 4.7.9.1.1 Thefiresuppression watersystemshallbedemonstrated OPERABLE:

a.Atleastonceper7daysbyverifying thewatersupplycontained inthefirewatertanks.b.Atleastonceper31daysonaSTAGGERED TESTBASISbystartingeachpumpandoperating itforatleast15minutesonrecirculation flow.c~Atleastonceper31daysbyverifying thateachvalve(manual,poweroperated, orautomatic) intheflowpaththatisnotlocked,sealed,orotherwise securedinposition, isinitscorrectposition.

d.Atleastonceper6monthsbyperformance ofasystemflushofabovegroundinternaldistribution headersandfirehydrants.

e.Atleastonceper12monthsbycyclingeachtestablevalveintheflowpaththroughatleastonecompletecycleoffulltravel.Atleastonceper18monthsbyperforming asystemfunctional testwhichincludessimulated automatic actuation ofthesystemthroughout itsoperating

sequence, and:1.Verifying thateachautomatic valveintheflowpathactuatestoitscorrectposition, 2.Verifying thateachpumpdevelopsaflowofatleast2500gpmatasystemheadofatleast300feetofwaterbyobserving threepoints(minimum, rated,andpeak)onthepump'sperformance curve,3.Cyclingeachvalveintheflowpaththatisnottestableduringplantoperation throughatleastonecompletecycleoffulltravel,and4.Verifying thateachpumpstartsinitspreplanned sequencetomaintainthefiresuppression watersystempressuregreaterthanorequalto100psig.goAtleastonceper3yearsbyperforming aseriesofflowtestssothateveryfiremainsegment(excluding individual systemsupplies) hasbeenverifiedtobeclearofobstruction byafullflowtest.COOKNUCLEARPLANT-UNIT23/47-37AMENDMENT NO.44,445

~~II~

PLANTSYSTEMSSURVEILLANCE REUIREMENTS Continued 4.7.9.1.2 Thefirepumpdieselenginesshallbedemonstrated OPERABLE:

a.Atleastonceper31daysbyverifying:

1,Thefuelstoragetankscontainatleast160gallonsoffuel,and2.Thedieselsstartfromambientconditions andoperateforatleast30minutes.b.Atleastonceper92daysbyverifying thatasampleofdieselfuelfromthefuelstoragetanksobtainedinaccordance withASTM-D4057-81iswithintheacceptable limitsspecified inTable1ofASTM-D975-81whencheckedforviscosity, waterandsediment.

c>>Atleastonceper18monthsbysubjecting thedieselstoaninspection inaccordance withprocedures preparedinconjunction withthemanufacturer's recommendations forthisclassofstandbyservice.4.7.9.1.3 Thefirepumpdieselstartingbatterybanksandchargersshallbedemonstrated OPERABLE:

a.Atleastonceper7daysbyverifying that:1.Theelectrolyte levelofeachbatteryisabovetheplates,and2.Theoutputbatteryvoltageofeachbankisgreaterthan24volts.b.Atleastonceper92daysbyverifying thatthespecificgravityisappropriate forcontinued serviceofeachbattery.c~Atleastonceper18monthsbyverifying that:1.Thebatteries, cellplatesandbatterypacksshownovisualindication ofphysicaldamageorabnormaldeterioration, and2.Thebattery-to-battery andterminalconnections areclean,tight,freeofcorrosion, andcoatedwithanti-corrosion material.

COOKNUCLEARPLANT-UNIT23/47-38AMENDMENT NO.44,,'I ek1llItL~J'y)'I~l\~

PLANTSYSTEMSBASESTheservicelifeofasnubberisevaluated viamanufacturer's inputandinformation throughconsideration ofthesnubberserviceconditions andassociated installation andmaintenance records(newlyinstalled snubber,sealreplaced, springreplaced, inhighradiation area,inhightemperature area,etc...).Therequirement tomonitorthesnubberservicelifeisincludedtoensurethatthesnubbersperiodically undergoaperformance evaluation inviewoftheirageandoperating conditions.

Theserecordswillprovidestatistical basesforfutureconsideration ofsnubberservicelife.Therequirements forthemaintenance ofrecordsandthesnubberservicelifereviewarenotintendedtoaffectplantoperation.

Thenumberofsnubberstobefunctionally testedduringeachsurveillance isbasedoncalculations performed toallowextension ofthesurveillance intervalfrom18monthsto24months,andtherefore, thenumberofsnubbersfunctionally testeddeviatesfromthenumberrequiredbytheWestinghouse StandardTechnical Specifications (NUREG-0452, Revision4).34.7.8SEALEDSOURCECONTAMINATION Thelimitations onremovable contamination forsourcesrequiring leaktesting,including alphaemitters, isbasedon10CPR70.39(c)limitsforplutonium.

Thislimitation willensurethatleakagefrombyproduct, source,andspecialnuclearmaterialsourceswillnotexceedallowable intakevalues.34.7.9PIRESUPPRESSION SYSTEMSTheOPERABILITY ofthefiresuppression systemsensuresthatadequatefiresuppression capability isavailable toconfineandextinguish firesoccurring inanyportionofthefacilitywheresafety-related equipment islocated.Thefiresuppression systemconsistsofthewatersystem,sprayand/orsprinklers, CO2,halonandfirehosestations.

Thecollective capability ofthefiresuppression systemsisadequatetominimizepotential damagetosafety-related equipment andisamajorelementinthefacilityfireprotection program.IntheeventthatoneormoreC02suppression systemsrequiring automatic actuation mustbeisolatedforpersonalprotection topermitentryforroutinetours,maintenance, construction, orsurveillance testingintheprotected area,thefiredetection system(s) requiredtobeOPERABLEbySpecification 3.3.3.7shallbeverifiedtobeOPERABLE.

Isolation ofanautomatic C02suppression syst:emtemporarily putsthissysteminamanualactuation mode.Relianceonthefiredetection system,inconjunction withtheabilitytomanuallydischarge theCOsuppression system,willprovideadequatefireprotection forperiodswhenpersonnel arerequiredtoworkintheseareas,COOKNUCLEARPLANT-UNIT2B3/47-6AMENDMENT NO.6k,

'I~4 PLANTSYSTEMSBASES34.7.9Continued Intheeventthatportionsofthefiresuppression systemsareinoperable, alternate backupfirefightingequipment isrequiredtobemadeavailable intheaffectedareasuntiltheinoperable equipment isrestoredtoservice.Whentheinoperable fire-fighting equipment isintendedforuseasabackupmeansoffiresuppression, alongerperiodoftimeisallowedtoprovideanalternate meansoffirefightingthaniftheinoperable equipment istheprimarymeansoffiresuppression.

Backupfireprotection equipment willnormallytaketheformofpermanently mountedfireextinguishers and/orfirehosestationsinornearthearea,orfirehosesroutedtotheaffectedarea.Intheeventthatthefirewatertanksbecomeinoperable, LakeMichiganmayserveastheirbackup.Twomanual,diesel-engine driven,vertical-turbine firepumpsratedat2000gpm,whichtakesuctionoffofLakeMichiganandprovidewatertothefiresuppression header,areadministratively controlled.

Oneofthesepumpsmayserveasabackuptooneofthefiresuppression pumpsthattakesuctionoffofthetanks.However,itisnotourintenttorelyonbackupsystemsorothercompensatory measuresforanextendedperiodoftimeandactionwillbetakentorestoretheinoperable portionsofthefiresuppression systemtoOPERABLEstatuswithinareasonable period.Thesurveillance requirements provideassurance thattheminimumOPERABILITY requirements ofthefiresuppression systemsaremet.Whileperforming thesurveillances specified in4.7.9.1.1 thefiresuppression watersystemisstillcapableofperforming itsintendedfunction.

Consequently, itisnotnecessary toentertheACTIONSTATEMENT specified in3.7.9.1whiletheSURVEILLANCES specified in4.7.9.1.1 arebeingperformed, unlessthetestedequipment failstheSURVEILLANCE.

Inaddition, anallowance ismadeforensuringasufficient volumeofHalonandC02intheHalonandC02storagetanksbyverifying eithertheweight,level,orpressureofthetanks.Thefiresuppression watersystemhasthreefirepumpscommontobothunitswhichdischarge intounderground ringheaders.Thereisonemotor-driven horizontal centrifugal firepumpratedat2500gpmthattakessuctionfromthefirewaterstoragetanks;andtwodiesel-engine-driven horizontal centrifugal firepumpsratedat2500gpmthattakesuctionfromthefirewaterstoragetanks.Havingacombination ofdiesel-driven andelectric-motor-driven pumpsinthesystemdesignisconsistent withNRCBranchTechnical PositionAPSCB9'-1.TheflowpathscapableoftakingsuctionfromLakeMichiganarenormallyisolatedtoprecludezebramusselinfestation ofthesystem.COOKNUCLEARPLANT-UNIT2B3/47-7AMENDMENT NO.

43PC-II BASES34.7.9Continued Thepurposeofthecharcoalfilterfiresuppression T/Sistoaccountfordetection andsuppression offiresinthecharcoalfilters.Manualoperation ofthesesystemsisallowedbecausetwo-point heatdetection withcontrolroomandlocalannunciation oftroubleconditions isprovidedforthecharcoalfilters.TheOPERABILITY ofthefiresuppression systemprotecting thecharcoalfiltersisonlyrequiredwhenthereischarcoalinthefilters.Actuation ofspraywaterontothecharcoalfiltersrequiresboththemanualopeningofthesystemisolation valveandreachingthehightemperature alarmsetpointfortheautomatic openingofthesystemdelugevalve.Becauseoftheinaccessibility ofthelowercontainment topersonnel duringoperation duetoALARAradiation exposureconcerns, theuseofoneormoreCCTVsinthelowercontainment, tomonitorforfireandsmoke,isanacceptable substitute toacontinuous firewatch,ifthefiresuppression systembecomesinoperable.

Allhourlyfirewatchpatrolsareperformed atintervals ofsixtyminuteswithamarginoffifteenminutes.Acontinuous firewatchrequiresthatatrainedindividual beinthespecified areaatalltimesandthateachfirezonewithinthespecified areabepatrolled atleastonceeveryfifteenminuteswithamarginoffiveminutes.Acontrolvalveisdefinedasavalvethatwhencloseddoesnotleaveanalternate openflowpathtoasystem,Asectionalizing valveisdefinedasavalvethatwhencloseddoesnotpreventanalternate openflowpathtoasystemandhencedoesnotmakethefiresuppression watersysteminoperable.

Undercertainsituations, theclosureofasectionalizing valvefollowedbytheclosureofasecondvalvewillnotleaveanopenflowpathtooneofthespecified systems.Inthisinstance, ActionStatement cofSpecification 3.7.9.1isapplicable.

Manualactuation ofCOfiresuppression systemsprovidesadequatefireprotection fortheprotected areasbasedonoperablefiredetection inthearea,lowcombustible

loadings, andpromptfirebrigaderesponsetoalarms.COOKNUCLEARPLANT-UNIT2B3/47-8AMENDMENT NO.4k, I1h4'P,P'14I&rl' BASES34.7.9Continued ManyoftheActionStatements takecreditforOPERABLEfiredetection inlieuofafirewatchwhenafireprotection systemisinoperable.

OPERABLEfiredetection providessufficient earlywarningcapability ofafiretotheappropriate ControlRoom.DuringSurveillance TestingofaLowPressureCOSystemwiththesysteminoperable, therequirement foracontinuous firewatchmaybesuspended duringportionsofthetestwhichresultormayresultinadischarge intotheCOprotected area.Similarly, ifaC02actuation occurswhichresultsintheneedtohavetheLowPressureCOSystemmadeinoperable, therequirement foracontinuous firewatchmaybesuspended.

Ineithercase,theareaaffectedshallberestoredtohabitability assoonaspracticable, afterwhichthecontinuous firewatchistobere-established ifthesystemisstillinoperable.

34.7.10FIRERATEDASSEMBLIES TheOPERABILITY ofthefirebarriersandbarrierpenetrations e'nsuresthatfiredamagewillbelimited.Thesedesignfeaturesminimizethepossibility ofasinglefireinvolving morethanonefireareapriortodetection andextinguishment.

Thefirebarriersandfirebarrierpenetration sealingdevicesareperiodically inspected toverifytheirOPERABILITY.

Thefunctional testingofthefiredampersisprovidedtoensurethatthedampersremainfunctional.

Theventilation sealsaresealsaroundventilation ductworkpenetrating firebarriers.

Itisnotourintenttorelyonbackupsystemsorothercompensatory measuresforanextendedperiodoftimeandACTIONwillbetakentorestoretheinoperable portionsofthefireratedassemblytoOPERABLEstatuswithinareasonable period.Forthepurposeofdetermining OPERABILITY, anOPERABLEfireratedassembly/sealing deviceisonethatiscapableofperforming itsintendedsafetyfunction.

COOKNUCLEARPLANT-UNIT2B3/47-9AMENDMENT NO.July15,1986BasesClarification