ML17228B181

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Proposed Tech Specs Re Time Allowed to Restore Inoperable LPSI Train to Operable Status
ML17228B181
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 06/21/1995
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17228B182 List:
References
NUDOCS 9506230234
Download: ML17228B181 (17)


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EMERGENCYCORECOOLINGSYSTEMSECCSSUBSYSTEMS-T>325'FLIMITINGCONDITIONFOROPERATIONC~cEVp.C4OOSI:l.soBAut<SPSfaeiH.L-9f-t(s/<Vvv)3.5.2TwoindependentECCSsubsystemsshallbeOPERABLEwitheachsub-systemcomprisedof:a.OneOPERABLEhigh-ressuresafestinjection(HPSI)um,Qne-usys-em-si-ncum-an-e-seeon~bsystem-shQ-1-Hict-ude-m-ther-HRS-I-pumb.OneOPERABLElow-pressuresafetyinjectionpump,andc.AnindependentOPERABLEflow.pathcapableoftakingsuctionfromtherefuelingwatertankonaSafetyInjectionActuationSignalandautomaticallytransferringsuctiontothecontainmentsumponaRecirculationActuationSignal.APPLICABILITY:MODES1,2and3.".ACTION:a.b.WithoneECCSsubsysteminoperable,restoretheinoperablesubsystemtoOPERABLEstatuswithin72hours+orbeinHOTSHUTDOWNwithinthenext12hours.,$"v'gSafIntheeventtheECCSisactuatedandinjectswaterintotheReactorCoolantSystem,aSpecialReportshallbepreparedandsubmittedtotheCommissi.onpursuanttoSpecification6.9.2within90daysdescribingthecircumstancesoftheactuationandthetotalaccumulatedactuationcyclestodate."Withpressurizerpressure>1750psia.ZftheECCssubsystemisinoperableonlybecausetheLpSItrainisinoperable<,the72hourlimitmaybeextendedtoamaximumof7daysfrominitial"discoveryoffailuretomeettheLCO.ST.LUCIE-UNIT13/45-3AmendmentNo.'7506230234'750621PDRADaCK05000335pPDR

,rlV'I EMERGENCYCORECOOLINGSYSTEMSSURVEILLANCERKUIREMENTS(Continuede.Atleastonceper18months,duringshutdown,by:l.VerifyingthateachautomaticvalveintheflowpathactuatestoitscorrectpositiononaSafetyInjectionActuationSignal.2.VerifyingthateachofthefollowingpumpsstartautomaticallyuponreceiptofaSafetyInjectionActuationSignal;a.High-PressureSafetyInjectionpump.b.Low-PressureSafetyInjectionpump.QgQP53.VerifyingonaRecirculationActuationTestSignal,thecontainmentsumpisolationvalves.openandtherecirculationvalv5otherefuelingwatertankclose.PEPygQ'Tef.ByverifyingthateachofthefollowingpumpsdevelopsthespecifiedtotaldevelopedheadonrecirculationflowwhentestedpursuanttoSpecification4.0.5:1.High-PressureSafetyInjectionpumps:greaterthanorequalto2571ft.2.Low-PressureSafetyInjectionpumps:greaterthanorequalto350ft.ST.LUGIE-UNIT13/45-5AmendmentNo.gg,p(f

~~),(v~)t~,~~~t St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendmentsLPSISstemAOTExtensionATTACHMENT4ST~LUCIEUNIT2MARKED-UPTECHNICALSPECIFICATIONPAGESPage3/45-3Page3/45-5 EMERGENCYCORECOOLINGSYSTEMS3/4.5.2ECCSSUBSYSTEMS-T,GREATERTHANOREUALTO325FLIMITINGCONDITIONFOROPERATION3.5.2TwoindependentEmergencyCoreCoolingSystem(ECCS)subsystemsshallbeOPERABLEwitheachsubsystemcomprisedof:a.OneOPERABLEhighpressuresafetyinjectionpump,b.OneOPERABLElowpressuresafetyinjectionpump,andc.AnindependentOPERABLEflowpathcapableoftakingsuctionfromtherefuelingwatertankonaSafetyInjectionActuationSignalandautomaticallytransferringsuctiontothecontainmentsumponaRecirculationActuationSignal,andd.OneOPERABLEchargingpump.APPLICABILITY:MODES1,2,and3".ACTION:a.WithoneECCSsubsysteminoperable,restoretheinoperabl'esubsystemtoOPERABLEstatuswithin72hours~orbeinatleastHOTSTANDBYwithinthenext6hoursandinHOTSHUTDOWNwithinthefollowing6hours.Serscri'.IntheeventtheECCSisactuatedandinjectswaterintotheReactorCoolantSystem,aSpecialReportshallbepreparedandsubmittedtotheCommissionpursuanttoSpecification6.9.2within90daysdes-cribingthecircumstancesoftheactuationandthetotalaccumulatedactuationcyclestodate.ThecurrentvalueoftheusagefactorforeachaffectedsafetyinjectionnozzleshallbeprovidedinthisSpecialReportwheneveritsvalueexceeds0.70.Withpressurizerpressuregreaterthanorequalto1750psia.IftheECCSsubsystemisthe72hourlimitmaydiscoveryoffailuretoinoperableonlybecausetheLPSItrainisinoperable,beextendedtoamaximumof7daysfrominitialmeettheLCO.ST.LUCIE-UNIT23/45-3 rfApreg~I)Qa<yQ~,LS"'

EMERGENCYCORECOOLINGSYSTEMSSURVEILLANCEREUIREMENTS(Continued)2.Avisualinspectionofthecontainmentsumpandverifyingthatthesubsystemsuctioninletsarhnotrestrictedbydebrisandthatthesumpcomponents(trashracks,screens,etc.)shownoevidenceofstructuraldistressorcorrosion.3.4.f.At2.3:Verifyingthataminimumtotalof173cubicfeetofsolidgranulartrisodiumphosphatedodecahydrate(TSP)iscontainedwithintheTSPstoragebaskets.Verifyingthatwhenarepresentativesampleof70.5+0.5gramsofTSPfromaTSPstoragebasketissubmerged,withoutagitation,in10.0+O.lgallonsof120+10'FboratedwaterfromtheRWT,thepHofthemixedsolutionisraisedtogreaterthanorequalto7within4hours.leastonceper18months,duringshutdown,by:VerifyingthateachautomaticvalveintheflowpathactuatestoitscorrectpositiononSIASand/orRAStestsignals.VerifyingthateachofthefollowingpumpsstartautomaticallyuponreceiptofaSafetyInjectionActuationTestSignal:a.High-PressureSafetyInjectionpump.b.Low-PressureSafetyInjectionpump.VerifyingthatonamRecirculationActuationTestSignal,thecontainmensumpisolationvalvesopenandthe'ecirculationvalvtotherefuelingwatertankclos~g.ByverifyingthateachofthefollowingpumpsdevelopsthespecifiedtotaldevelopedheadonrecirculationflowwhentestedpursuanttoSpecification4.0.5:High-PressureSafetyInjectionpumps:greaterthanorequalto2854ft.2.Low-PressureSafetyInjectionpump:greaterthanor,equalto374ft.h.Byverifyingthecorrectpositionofeachelectricaland/ormechanicalpositionstopforthefollowingECCSthrottlevalves:l.DuringvalvestrokingoperationorfollowingmaintenanceonthevalveandpriortodeclaringthevalveOPERABLEwhentheECCSsubsystemsarerequiredtobeOPERABLE.ST.LUCIE-UNIT23/45-5 St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendmentsLPSISstemAOTExtensionL-95-133ENCLOSURE'ointApplicationsReportforLOWPRESSURESAFETYINJECTIONSYSTEMAOTEXTENSION(CENPSD-995,FinalReportCEOGTask836;May,1995)

ATTAABVQ~22TA"Mark-up"ofNUREG-1432SECTIONS3.5.2&83.52 ECCS-Operating3.5.23.5EMERGENCYCORECOOLINGSYSTEHS(ECCS)3.5.2ECCS-OperatingLCO3.5.2TwoECCStrainsshallbeOPERABLE.APPLICABILITY:MODES1and2,HODE3withpressurizerpressure~f1700]psia.ACTIONSCONDITIONREQUIREDACTIONCOMPLETIONTIHEA.lOneormoretrainsinorable.ANDAtlea100~ftheECClowequivnttasingleOPERAA.1Restore'~~toOPERABLEstatus.7dLoy'sRequiredActionand~~~~~associatedCompletionTimenotmet.CP'.1BeinMODE3.AND.2Reducepressurizerpressureto<[1700]psia.6hours12hoursGEOGSTS3.5-4Rev.0,09/28/92 INSERTAOneLPSIsubtraininoperable.INSERTBB.OneormoreECCStrainsinoperableduetocondition(s)otherthanConditionA.B.1RestoreECCStrain(s)toOPERABLEstatus.72hoursANDAtleast100%%uooftheECCSQowequivalenttoasingleOPERABLEECCStrainavailable.

ECCS-OperatingB3.5.2BASESACTIONSA.lconinued)OPERABLEsta'2hours.TheompletionTimeisbasedonanNRCs4usingareliabilityevaluationan'asonableamountofeetmanyrAnECCStrainisinoperableifitisnotcapableofdeliveringthedesignflowtotheRCS.Theindividualcomponentsareinoperableiftheyarenotcapableofperformingtheirdesignfunction,orifsupportingsystemsarenotavailable.ZQSE%'TRETheLCOrequirestheOPERABILITYofanumberofindependentsubsystems.Ouetotheredundancyoftrainsandthediversityofsubsystems,theinoperabilityofonecomponentinatraindoesnotrendertheECCSincapableofperformingitsfunction.Neitherdoestheinoperabilityoftwodifferentcomponents,eachinadifferenttrain,necessarilresultinalossoffunctionfortheECCS.TheintenftomaintainacombinationofOPERABLEequipmentsuchthat1008oftheECCSflowequivalentto1008ofasingleOPERABLEtrainremainsavailable.Thisallowsincreasedflexibilityinplantoperationswhencomponentsinoppositetrainsareinoperable.AneventaccompaniedbyalossofoffsitepowerandthefailureofanemergencyOGcandisableoneECCStrainuntilpowerisrestored.Areliabilityanalysis(Ref.4)hasshownthattheimpactwithonefullECCStraininoperableissufficientlysmalltojustifycontinuedoperationfor72hours.Reference5describessituationsinwhichonecomponent,suchasashutdowncoolingtotalflowcontrolvalve,candisablebothECCStrains.ioneormorecomponlnhtat100~oftheeu'wtoasingleOPERABLEavailable,thefacilityisinaconditietheaccienmustbeimediatelentered.Therefore,c.1and.2Iftheinoperabletraincannotberestoredto'OPERABLEstatuswithintheassociatedCompletionTime,theplantmust(continued)CEOGSTSB3.5-15Rev.0,09/28/92 INSERTAAeachofConditionAandConditionBareINSERTABEachofConditionAandConditionBincludesacombinationofOPERABLEequipmentsuchthatatleast100%oftheECCSflowequivalenttoasingleOPERABLEECCStrainremainsavailable.ConditionAaddressesthespeciQcconditionwheretheonlyaffectedECCSsubsystemisasingleLPSIsubtrain.Theavailabilityofatleast100%oftheECCSQowequivalenttoasingleOPERABLEECCStrainisimplicitinthedeQnitionofConditionA.IfLCO3.52requirementsarenotmetdueonlytotheexistenceofConditionA,thentheinoperableLPSIsubtraincomponentsmustbereturnedtoOPERABLEstatuswithinseven(7)daysofdiscoveryofConditionA.Thisseven(7)dayCompletionTimeisbasedontheQndingsofthedeterministicandprobabilisticanalysisthatarediscussedinReference6.Seven(7)daysisareasonableamountoftimetoperformmanycorrectiveandpreventativemaintenanceitemsontheaffectedLPSIsubtrain.Reference6concludedthattheoveraHriskimpactofthisCompletionTimewaseitherrisk-beneQcialorrisk-neutral.ConditionBaddressesotherscenrarioswheretheavailabilityofatleast100%oftheECCSQowequivalenttoasingleOPERABLEECCStrainexistsbutthefullrequirementsofLCO352arenotmet.IfConditionBexists,theninoperablecomponentsmustberestoredsuchthatConditionBdoesnotexistwith72hoursofdiscovery.The72hourCompletionTimeisbasedonanNRCreliabilitystudy(Ref.4)andisareasonableamountoftimetoeffectmanyrepairs.INSERTACWithoneormorecomponentsinoperablesuchthat100%oftheequivalentQowtoasingleOPERABLEECCSisnotavailable,thefacilityisinaconditionoutsideoftheaccidentanalyses.Insuchasituation,LCO3.03mustbeimmediatelyentered.

ECCS-OperatingB3.5.2BASESACTIONS.1and.2(continued)bebroughttoaMODEinwhichtheLCOdoesnotapply.Toachievethisstatus,theplantmustbebroughttoatleastMODE3within6hoursandpressurizerpressurereducedto<1700psiawithin12hours.TheallowedCompletionTimesarereasonable,basedonoperatingexperience,toreachtherequiredunitconditionsfromfullpowerinanorderlymannerandwithoutchallengingunitsystems.SURVEILLANCEREQUIREMENTSSR3.5.2.1VerificationofpropervalvepositionensuresthattheflowpathfromtheECCSpumpstotheRCSismaintained.MisalignmentofthesevalvescouldrenderbothECCStrainsinoperable.Securingthesevalvesinpositionbyremovingpowerorbykeylockingthecontrolinthecorrectpositionensuresthatthevalvescannotbeinadvertentlymisalignedorchangepositionastheresultofanactivefailure.ThesevalvesareofthetypedescribedinReference5,whichcandisablethefunctionofbothECCStrainsandinvalidatefheaccidentanalysis.A12hourFrequencyisconsideredreasonableinviewofotheradministrativecontrolsensuringthatamispositionedvalveisanunlikelypossibility.SR3.5.2.2Verifyingthecorrectalignmentformanual,poweroperated,andautomaticvalvesintheECCSflowpathsprovidesassurancethattheproperflowpathswillexistforECCSoperation.ThisSRdoesnotapplytovalvesthatarelocked,sealed,orotherwisesecuredinposition,sincethesevalveswereverifiedtobeinthecorrectpositionpriortolocking,sealing,orsecuring.Avalvethatreceivesanactuationsignalisallowedtobeinanonaccidentpositionprovidedthevalveautomaticallyrepositionswithintheproperstroketime.ThisSurveillancedoesnotrequireanytestingorvalvemanipulation.Rather,itinvolvesverificationthatthosevalvescapableofbeingmispositionedareinthecorrectposition.(continued)CEOGSTS83.5-16Rev.0,09/28/92 ECCS-OperatingB3.5.2BASESSURVEILLANCERE(UIREMENTSSR3.5.2.10(continued)outage,ontheneedtohaveaccesstothethepotentialforunplannedtransientsifwereperformedwiththereactoratpower.sufficienttodetectabnormaldegradationbyoperatingexperience.location,andontheSurveillanceThisFrequencyisandisconfirmedREFERENCES~ScRTRD1.10CFR50,AppendixA,GDC35.2.10CFR50.46.3.FSAR,Chapter[6].4.NRCMemorandumtoV.Stello,Jr.,fromR.L.Baer,"RecommendedInterimRevisionstoLCOsforECCSComponents,"December1,1975.5.IEInformationNoticeNo.87-01,January6,1987.CEOGSTSB3.5-19Rev.0,09/28/92 INSERTAD6.CENPSD-995,"CEOGJointApplicationsReportforLowPressureSafetyInjectionSystemAOTExtension,"April1995.