ML17244A555

Application for Amend to License DPR-18 to Delete Pressurizer Low Level Coincidence from Low Pressurizer Pressure Safety Injection Signal.Supporting Documentation Encl

ML17244A555
Person / Time
Site:	Ginna
Issue date:	06/07/1979
From:	WHITE L D ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17244A554	List: ML17244A553 ML17244A555
References
NUDOCS 7906130198
Download: ML17244A555 (17)

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UNITEDSTATESOFAMERICANUCLEARREGULATORYCOMMISSIONIntheMatterof.RochesterGasandElectricCorporation(R.E.GinnaNuclearPowerPlant,UnitNo.1)DocketNo.50-244APPLICATIONFORAMENDMENTTOOPERATINGLICENSEPursuanttoSection50.90oftheregulationsoftheU.S.NuclearRegulatoryCommission(the"Commission"),RochesterGas1andElectricCorporation("RG&E"),holderofProvisionalOperatingLicenseNo.DPR-18,herebyrequeststhattheTechnicalSpecifica-tionTable3.5-2setforthinAppendixAtothatlicensebeamendedinaccordancewithNRCBulletin79-06A,todeletethepressurizerlowlevelcoincidencefromlowpressurizerpressureSafetyInjectionsignal.Theproposedtechnical'pecificationchangeissetforthinAttachmentAtothisApplication.AsafetyevaluationissetforthinAttachmentB.Thisevaluationalsodemonstratesthattheproposedchangedoesnotinvolveasignificant,changeinthetypesorasignificant.increaseintheamountsofeffluentsoranychangeintheauthorizedpowerlevelofthe'facility.Justi-ficationforclassificationoftheamendmentpursuantto10CFRSection170.22isincludedas.AttachmentC.AcheckfortheappropriatefeeaccompaniesthisApplication.

CYIld teWHEREFORE,ApplicantrespectfullyrequeststhatAppendixAtoProvisionalOperatingLicenseNo.DPR-18beamendedintheformattachedheretoasAttachmentA.RochesterGasandElectricCorporationByL.D.Wxt,Jr.VicePresident,,ElectricandSteamProductionSubscribedandsworntobeforemeonthis7~dayofJune,1979.GARYI:sREISSIIOTARYPUBLIC,StateofII.Y.MonroeCo,/MCommissionExpiresMarch30,19.g/Ir

~~1AttachmentAReplaceTechnicalSpecificationpage3.5-5withtherevisedpage3.5-5.

TABIE3.5-2EMERGENCYCOOIINGNO.FUNCTIONALUNITNO.ofMIN.MIN.PERMISSIBIENO.ofCHANNELSOPERABLEDEGREEOF.BYPASSCHANNEISTOTRIP"'"'"'""CHANNEISREDUNDANCYCONDITIONS6OPERATORACTIONIFCONDITIONSOFCOLR1N3OR5CANNOTBEMET1.SAFETYINJECTIONa.Manualb.HighContainmentPressurec.SteamGeneratorLowSteamPressure/Loopd.PressurizerIowPressure2.CONTAINMENTSPRAYa.Manualb.Hi-HiContainmentPressure(ContainmentSpray)2setsof32of3inea.set2per1/setsetPrimarypressurelessHotShutdown"='"than2000psigHotShutdown:'HotShutdown:-'='otShutdown-'='-HotShutdown='='otShutdown-"J~t~t+Mustactuate2switchessimultaneously.Ifminimumconditionsarenotmetwithn24hours,stepsshallbetakenontheaffectedunittoplacetheunitincoldshutdownconditions.4Ifafunctionalunitisoperatingwiththeminimumoperablechannelsthenumberofchannelstotripthereactorwillbecolumn3lesscolumn4.

AttachmentBThedesignmodificationwillremovetherequirementforpressurizerlowlevelcoincidentwithpressurizer(primarysystem)lowpressurehforautomaticSafetyInjection(SI)initiation.Theexistinglogicprovidesthreechannelswithseriespressureandlevelcontacts(logicalAND)asshowninFigurel.AnyoneofthesethreechannelswillinitiateS.I.oncoincidentlowlevelandlowpressureinthepressurizer.Becausesteamvoidscanformduringadepressurizationevent,sufficientprimarycoolantmaybedisplacedinthereactorvesseltopreventpressurizerlevelfromfallingbelowthelowlevelsetpoint,thusblockingautomaticinitiationofSafetyInjection.InaccordancewithNRCBulletin79-06A,thisdesignmodificationdeletesthepressurizerlowlevelcoincidencefromlowpressurizerpressureSafetyInjection.Themodifieddesignwillinitiatesafetyinjectionwhenanytwoout.ofthreepressurizerlowpressuresignalsarereceivedasshowninFigure2.Thedesignmodificationshallconformwithallapplicablerequire-mentsofIEEEStd.279-1971.InparticularSection4.7.3statesthat,"whereasinglerandomfailurecancauseacontrolsystemactionthat,resultsinaconditionrequiringprotectiveactionandcanalsopreventproperactionofaprotectionsystemchanneldesignedtoprotectagainstthecondition,theremainingredundant,protectionchannelsshallbecapableofprovidingtheprotectiveactionevenwhendegradedbyasecondrandomfailure."The protectivechannelsusedinthisdesignarealsoutilizedto;openthepressurizerpower-operatedreliefvalvesonhighprimarypressure.Inordertoassurethatnosinglechannelfailure(failhigh)cancausespuriousopen'ingofthePORV,acoincident1(logicalAND)highpressuresignalfromanindependentchannelshallberequiredforPORVactuation.Thepermissivehighpressuresetpoint,.shallbesetabovetheoperatingrangesothat,thesystemdoesnotnormallyoperatewithapermissivesignalpresent.ThecontrollogicisshowninFigures3(a)and3(b)forexistingandproposedsetpoints.Pressurizersprayisactuatedbyeitherchannel429or431.Analyseshavebeenperformedtodetermineifafailure(failhigh)ofoneofthesechannels,causingspuriousoperationofthepressurizerspray,canresultinaplantconditionrequiringSafetyInjection.Thisanalysisshowsthat'hesafetyinjectionsetpointisreachedinapproximatelythreeminutes.EitherapressurechannelindependentoftheSIsystemshallbeusedforsprayactuation,ortheinputtotheSIsystem,nowfromachannelalsoactuatingpressurizerspray(431),shallbeinsteadsuppliedbyachannelindependentofthepressurizerspraysystem(449).Whenanychannelgoesintoalarm,itshallbeannunciatedintheMainControlRoominamannerconsistentwiththeexistingSafe-guardsSystems.TheSafetyInjectionactuationshallbeannunciated,intheMainControlRoomandtransmittedtotheplantcomputerinamannerconsistentwiththeexistingSafeguardsSystems.

.rl Test,switchesshallbeprovidedtoprovidecapabilityfortestingduringpoweroperationinaccordancewithSection4.10ofIEEE279-1971andIEEE338-,1977.ThepurposeofthisTechnicalSpecificationChangeistoreviseTable3.5-2toreflectthedeletionoflowpressurizerlevelcoincidencefromlowpressurizerpressureSI.ThedeletionofthelowlevelcoincidencefromthelowpressurizerpressureSIhasnegligibleeffectonthePlantTransientAnalysisortheECCSAnalysisforR.E.Ginna.TheanalysiswasdonewithSIinitiatedoncoincidenceoflowpressurizerpressure.andlevelsignals.TheeffectofchangingtoapressureonlysignalwillresultineitheranearlierinitiationofSI,ornochangeinthetimeofSIinitiation.Therefore,currentPlantTransientandsmallbreakanalysisassumptionsconcerningSIinitiationtimeareappropriate.

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ROCHESTERGASANDELECTRICCORPORATPressurizerReliefValveOperation4294314304492185Ps3.g2335Ps3.g2335Ps3.g2185Ps3.gPCV430(Press.Relief:Valve)PCV431(Press.ReliefValve)Figure3(a)'ExistingSetpoints429431430449.P)3.g2335Ps3.g2335Ps3.g?335Ps3.gPCV430(Press.ReliefValves)PCV431(Press.ReliefValve)Figure3(b)ModifiedSetpoints AttachmentBAsaresultoftheThreeNileNileIslandaccidenttheNRCissuedIEBulletinNo.79-06Awhichrequiredchangestothelowpressurizer;.pressureSafetyInjection(SI)logic.PriortotheBulletinonemethodofgeneratingaSIsignalwasalowpressurizerpressureincoincidencewithlowpressurizerlevel.TheBulletinpostulatedthatpressurizerlevelmaynotrepresentthelevelinthereactorcoolantsystemundercertaintransientconditions.Therefore,pressurizerlowlevelcoincidenceshouldbedeletedfromlowpressurizerpressureSI.ThepurposeofthisTechnicalSpecificationChangeistoreviseTable3.5-2toreflectthedeletionoflowpressurizerlevelcoincidencefromlowpressurizerpressureSI.ThedeletionofthelowlevelcoincidencefromthelowpressurizerpressureSIhasnegligibleeffect.onthePlantTransientAnalysisortheECCSAnalysisforR.E.Ginna.TheanalysiswasdonewithSIinitiatedoncoincidenceoflowpressurizerpressureandlevelsignals.TheeffectofchangingtoapressureonlysignalwillresultineitheranearlierinitiationofSI,ornochangeinthetimeofSIinitiation.Therefore,currentPlantTransientandsmallbreakanalysisassumptionsconcerningSIinitiationtimeareappropriate.

p-,s~AttachmentCTheproposedAmendment,totheProvisionalOperatingLicensehasbeenevaluatedanddeterminedtofallwithinthedefinitionofClass1IIIof10CFRSection170.22therebyrequiringafeeof$4,000.TheproposedamendmentsimplyrevisesTable3.5-2forthedeletionoflowpressurizerlevelcoincidencefromlowpressurizerpressureSafetyInjectionasrequiredbyIEBulletinNo.79-06A.

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