ML17254A603
| ML17254A603 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 10/22/1985 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17254A600 | List: |
| References | |
| NUDOCS 8510220379 | |
| Download: ML17254A603 (21) | |
Text
AttachmentARevisetheTechnicalSpecificationpagesasfollows:Remove3.5-223.6-53.6-63.6-7'.6-113.8-14.4-74.4-8Insert3.5-223.6-53.6-63.6-73".6-7A3.6-113.8-14.4-74.4-8ggj0',031~0g000244jjg102>.DRPQOCKoPQRP ITABLE3.5-7,RadiationAccidentMonitorinInstrumentationInstrument1.ContainmentArea(R-29andR-30)2.NobleGasEffluentMonitorsMinimumChannels~OerableActionPlantVent(R-14)ii.AMainSteamLine(R-31)iii.BMainSteamLine(R-32)iv.ContainmentPurge(R-12A)v~AirEjector(R-15A)ActionStatementsAction1-WiththenumberofoperablechannelslessthanrequiredbytheMinimumChannelsOperablerequirements,eitherrestoretheinoperablechannel(s)tooperablestatuswithin7daysoftheevent,orprepareandsubmitaSpecialReporttotheCommissionwithin30daysfollowingtheeventoutliningtheactiontaken,thecauseoftheinoperabilityandtheplansandscheduleforrestoringthesystemtooperablestatus.*onlywhentheshutdownpurgesystemflangesareremoved.3.5-22Proposed IIIlttklllk11' PENT.NO.121121121121123124124..125126127128e129g130131132140IDENTIFICATION/DESCRIPTIONNitrogentoPRTReactorMakeupwatertoPRTCont.Press.transmitterPT-945(10)Cont.Press.transmitterPT-946(10)ReactorCoolantDrainTank(RCDT)to(RExcessletdownsupplyandreturntoheatexchangerPostAccidentairsample"C"fanCanponentGoolingWater(CW)fran1BRCPQOWfran1ARCPRCDT8(PRTtoVentHeaderE-CCWtoreactorsupportcoolingQOWtoreactorsupportcoolingblini-Purgeexhaust--RHRpumpsuctionfran"A"HotlegISOZATIONBOUNDARYCV528CV529PT945PT946AOV1789AOV745CV743MV1569MV1572MOV759BMOV759ACV750ACV750BAOV1787CV1713MOV813MOV814AOV7970MOV701(20)MAXKMUMISOZATIONTIME*(SEC)6060606060ISOZATIONBOUNDAHYMV547(8)AOV508MV1819AMV1819BMV1655(7)MV1571MV1574(12)(12)MOV749AMOV749BAQV1786(19)AOV7971(6)MMGMUMISOZATIONTIME*(SEC)60606060 1L0lIIit'h1'Il71III PENT.NO.1411421432012022032032042052062062070207209210IDENTIFICATION/DESCRIPTIONRHR-//1pumpsuctionfromSumpBRHR-jj2pumpsuctionfromSumpBRCDTpumpsuctionReactorCompart.coolingUnitA6B"B"Hydrogenrecombiner(pilot6main)Contain,Press.transmitterPT-947S948Postaccidentairsampleto"B"fanShutdownPurgeSupplyDuctHotlegloopsampleZrzr.liquidspacesample"A"S/GsamplePrzr.Steamspacesample"B"S/GsampleReactorCompart.coolingUnitsA8BOxygenmakeuptoA8BrecombinersISOLATIONBOUNDARYMOV850A(13)MOV850B(13)AOV1721MV4757(16)MV4636(16)MV1076BMV1084BPT947PT948MV1563MV1566flange(22)AOV966CAOV966BAOV5735AOV966AAOV5736MV4758(16)MV4635(16)MV1080AMAXIMUMISOLATIONTIME='(SEC)NANA60NANANANANANANANANA6060606060NANANAISOLATIONBOUNDARYMOV851A(13)MOV851B(13)AOV1003AAOV1003BSOVIV-3BSOVIV-5BMV1819CMV1819DMV1565MV1568AOV5869(22)MV956D(14)MV956E(14)MV5733(7)MV956FMV5734(7)SOVIV-2ASOVIV-2BCHAXIMUMISOLATIONTIME"-(SEC)-.NANA6060NANANormallyClosedNANormally'ClosedNANANANANANANANA.NANANANANormallyClosedNANormallyClosed 0,ur."f PENT.No.3003013033043053053053073083093103100~o311312313IDENTIFICATION/DESCRIPTIONShutdownPurgeExhaustDuctAux.steamsupplytocontainmentAux.steamcondensatereturn"A"Hydrogenrecombiner(pilotandmain)RadiationMonitorsR-ll,R-12SR-10AAutoInletIsol.R-ll,R-12SR-10AOutletPostAccidentairsampler(containment)FireServiceWaterServiceWaterto"A"fancoolerMini-PurgesupplyServiceAirtoContain.InstrumentAirtoContain.ServiceWaterfrom"B"fancoolerServiceWaterto"D"fancoolerIeakagetestdepressurizationISOLATIONBOUNDARYflange(22)MV6151MV6175MV1084BMV1076AAOV1597AOV1599MV1554MV1557MV1560CV9229MV4627(16)AOV7478CV7226CV5393MV4630(16)MV4642(16)flange60AOV1598MV1556MV1559MV1562'tNA-AOV9227NANANANANANAAOV7445MV7141AOV5392NANAMOV7444MAXIMUMIsoLAnom--IsoLAnoNTIME"(SEC)BOUNDARYNAAOV5879(22)NA-MV6165(15)NA-MV6152(15)NASOVIV-5ANA.-SOVXV-3A60~MV1596MAXIMUMIsoI,AnomTIME"(SEC)NANANANormalllyClos~NANormaU.lyClo~NA6060NANA(18)NANA60NANA.NANormallyClosed
PENT.NO.316317318320321~322323324332332IDENTIFICATION/DESCBIPTIONServiceWaterfran"C"fancoolerServiceWaterto"B"fancoolerLeakagetestsupplyDeadweighttester(deccmissioned)ServiceWaterfrcm"A"fancoolerServicewaterto"C"fancoolerAS/GBlmrdownBS/GBlcwdownServiceWaterfrcm"D"fancoolerDemineralizedwatertoContainmentCont.Press.Trans.PT-944,9496950LeakagetestandhydrogenmnitorinstrumentationlinesISOZATIONMV4643(16)MV4628(16)flangeweldedshutMV4629(16)MV4647(16)AOV5738AOV5737MV4644(16)CV8419PT944PT949PT950MV7448MV7452MV7456SOV921SOV922SOV923SOV924MAXIMUMISOZATIONTIME*(SEC)6060MOV7443weldedshutMV5701(7)MV5702(7)AOV8418MV1819GMV1819FMV1819Ecapcapcap(21)(21)(21)(21)MAXDIUMISOZATIONTIME*(SEC)Nh.NormallyClosed.0 II1h1IIKI.h.htItrII,"II75()~)IItt(,/~(>>~~'v/t)pI<-45C4I/1(c'CIF' (21)Acceptableisolationcapabilityisprovidedforinstrumentlinesbytwoisolationboundariesoutsidecontainment.OneoftheboundariesoutsidecontainmentmaybeaSeismicClass1closedsystemwhichissubjectedtoTypeCleakratetesting.(22)Theflangesatpenetrations204and300canonlyberemovedatcoldorrefuelingshutdown.Theflangesandassociateddoublesealsprovidecontainmentisolationandareacontainmentboundaryforallmodesofoperationbetweencoldshutdownandnormaloperation.Duringcoldandrefuelingshutdownwhentheflangesareremovedintegrityisprovidedbythe48inchvalves.3.6-11Proposed IIJIIf.~),ItJw"IIdr4,>>IIl~d'X)A~U~',k~'V/4
~v3.8REFUEZINGAlicabilit3.8.1Appliestooperatinglimitationsduringrefuelingoperations.~b'oensurethatnoincidentcouldoccurduringrefuelingoperationsthatwouldaffectpublichealthandsafety.Duringrefuelingoperationsthefollowingconditionsshallbesatisfied.a~Theequipmentdoor,oraclosureplatethatrestrictsairflowfromthecontainment,andatleastonepersonneldoorintheequipmentdoororclosureplateandinthepersonnelairlockshallbeproperlyclosed.Inaddition,allautomaticcontainmentisolationvalvesshallbeb.operableoratleastonevalveineachlineIshallbe',lockedclosed.The"48inch"shutdownltpurgevalvesmustalsobeoperableorclosedortheassociatedflangemustbeinstalled'.IIRadiationlevelsinthecontainmentshallbec~monitoredcontinuously.Coresubcriticalneutronfluxshallbecontin-uouslymonitoredbyatleasttwosourcerangeneutronmonitors,eachwithcontinuousvisual.indicationinthecontrolroomandonewithaudibleindicationinthecontairpnentandcontrolroomavailablewhenevercoregeometryisbeingchanged.Whencoregeometryisnotbeingchangedat3.8-1Proposed vshutdownanddepressurizeduntilrepairsareeffectedandthelocalleakagemeetstheacceptancecriterion.4.4.2.4TestFreuenca~b.~'i<ciExceptasspecifiedinb.,c.,andd.below,individualpenetrationsandcontainmentisolationvalvesshallbetestedduringeachreactorshutdownforrefueling,orotherconvenientintervals,butinnocaseat,intervalsgreaterthantwoyears.Thecontainmentequipmenthatch,fueltransfertube,andshutdownpurgesystemflangesshallbentestedateachrefuelingshutdownoraftereachuse,if,that.besooner.t(~',-The,containment,air'o'cks'hallbetestedat,intervalsofnomorethansixmonthsbypressurizingthespacebetweentheairlockdoors.Inaddition,followingopeningoftheairlockdoorduringtheinterval,atestshallbeperformedbypressurizingbetweenthedualsealsofeachdooropened,within48hoursoftheopening,unlessthereactorwasinthecoldshutdownconditionatthetimeoftheopeningorhasbeensubsequentlybroughttothecoldshutdowncondition.Atestshallalsobeperformedbypressurizingbetweenthedualsealsofeachdoorwithin48hoursofleavingthecoldshutdowncondition,unlessthedoorshavenotbeenopensincethelasttestperformedeitherbypressurizingthespacebetweentheairlockdoorsorbypressurizingbetweenthedualdoorseals.4.4-7Proposed 4.4.3RecirculationeteovlSstems4.4.3.1Testa~Theportionoftheresidualheatremovalsystemthatisoutsidethecontainmentshalleitherbetestedbyuseinnormaloperationorhydrostati-callytestedat350psigattheintervalspecifiedin4.4.3.4.b.SuctionpipingfromcontainmentsumpBtothereactorcoolantdraintankpumpandthedischargepipingfromthepumpstotheresidualheatremovalsystemshallbehydrostaticallygestedatgolessthat100psigattheintervalspecified)in$.4.3.4.4.4-,8Proposed AttachmentBContainmentpurgeandventoperationsbecameagenericconcernin1978.SincethattimecontainmentpurgeandventhasbeenthesubjectofmanylettersbetweentheStaffandRochesterGasandElectricCorp.(RG&E).InReference1,theStafftransmittedtoRGSEaSafetyEvaluationReport(SER)whichfoundRGE'sinteriumcommitmentstobeacceptable.TheSERprovidesagoodsummaryofthecorrespondanceandthecommitmentsmadeconcerningthissubject.TheexistingpurgeandventsystemsatGinnaconsistofa48inchpurgesystemanda6inchcontainmentvent(depressurization)system.Themajorissueconcerningthepurgesystemistheoperabilityofthe48inchpurgevalvesduringadesignbasisaccident-lossofcoolantaccident(DBA-LOCA).Therefore,RGGEhascommittedtomaintainingthe48inchpurgevalvesclosedwhilethereactoriscriticaluntilinformationdemonstratingoperabilityissubmitted.InresponsetotheStaff'srequesttolimitpurge/ventoperationstosafety-relatedneedsRG6Ecommittedtolimitingventsystemoperationtoatotalof90hoursperyear.TopermanentlyresolvethepurgeandventissueRG6Ehasdecidedtomodifythe48inchpurgesystemsothatitwillonlybeusedwhenthereactorisincoldorrefuelingshutdown,andinstallamini-purgesystemwhichwillallowunlimitedpurgingofcontainment.ThetechnicalspecificationchangespresentedinAttachmentAarenecessarytoimplementthesemodifications.Thefollowingchangeswillbemadetothe48inchpurgesystem:Theinboard48inch,butterfly-typecontainmentisolationvalvesfromboththesupplyandexhaustlineswillberemoved.Eachvalvewillbereplacedwitha,specialblind-flangetypeclosureutilizingdouble0-ringsealstoprovideredundantcontainmentisolationbarriers.Testportswillbeprovided.topermitperi-odiclocalleakratetestingofthedouble,O-ringseal."Theblindflangeclosureswillbesecurelybolted,inplace,,dur'ing.reactoroperationandwillonlybe'removedduringplantshutdowns.Theexistingoutboard48inch,butterfly-typeautomaticcontainment.isolationvalveswillremaininplacetoprovideanisolationbarrierduringrefuelingoperations.Sincetheblankflangeshaveadoubleseal,itwillnolongerbenecessarytorelyontheouter48inchvalvesforcontainmentisolationduringpoweroperation.Duringcoldorrefuelingshutdown,theflangescouldberemovedandtheoutervalveswillberelieduponforrefuelingintegrity.Sincethe48inchvalvesarenolongerrelieduponforcontainmentintegritythemechanicalstopsonthevalveswillberemoved.ThesestopswereinstalledtoreducestressesinthevalvesresultingfromclosureduringaDBA-LOCA.Sincethevalves'arenolongersubjecttoaDBA-LOCAthereisnoreasontocontinuerestrictingairflowinthe48inchsystemduringshutdown.
IIMIIIIII'tII Anewmini-purgesystemwillbeinstalledtoprovidethecapabilitytopurgecontainmentatmosphereduringallmodesofreactor'peration.This2000-cfmmini-purgesystemwillconsistofapairofredundantblowersforsupplying'airtothecontainmentthroughexisting6-inchIntegratedLeakRateTest(ILRT)ventlinepenetration309."New6i*nch,air'-.operated,butterfly-type,inboardandoutboar'dautomaticcontainmentisolationvalveswillbeinstalledatpenetration309.Airwillbeexhaustedthroughtheexisting6inchdepressurizationpenetration132andwillbeductedintotheAuxiliaryBuildingventilationsystemwhereitwillbefilteredandmonitoredpriortoitsreleasetotheenvi-ronmentviatheplantvent.Theexisting6inchvalvesatpene-tration132willbereplacedwithnew8inch,air-operated,butterfly-type,inboardandoutboardcontainment.isolationvalves.Allfournewcontainmentisolationvalveswillbeautomaticandwillbefully-qualifiedtoclosewithin5secondsfromthetimetheisolationsetpointisreachedagainstthemaximumcontainmentpressuresanticipatedduringaDBA-LOCA.Theinboardendsofthemini-purgesupplyandexhaustlineswillbeequippedwith1/2-inchmeshdebrisscreens.TheradiationaccidentmonitorR-12A(ContainmentPurge)monitorsthe48inchpurgeexhaust.Sincethe48inchpurgewillonlybeoperableduringcoldandrefuelingshutdown,R-12Aneedonlybeoperableduringcoldandrefuelingshutdown.Therefore,Table3.5-7wasmodifiedtobeconsistantwithoperationoftheshutdownpurgesystem.Inaccordancewith10CFR50.91,thesechangestotheTechnicalSpecificationshavebeenevaluatedagainstthreecriteriatodetermineiftheoperationofthefacilityinaccordancewithproposedamendmentwould:1.involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.Themodificationdoesnotinvolveanincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Installingamini-purgesystemandinstallingflangesonthe48inchvalvesdoesnotincreasetheprobabilityofanaccidentbecausetheflangeseliminatetheeffectsofanymalfunctionofthe48inchvalvesandthenewmini-purgevalvesaresmallandinherentlymorereliablethanthe48.inchvalves.Theconsequencesofanypreviouslyevaluatedaccidentarenotincreasedbythemodificationbecausetheflangespreventanyaccidentassociatedwiththe48inchsystemandclearlyanyaccidentassociatedwiththemini-purgesystemislesslimitingthananaccidentassociatedwiththe48inchsytem.
0~VIfIklil,I'l';tbblfP Themodificationdoesnotcreatethepossibilityofanewordifferentkindofaccident.Replacingthe48inchpurgesystemwithamini-purgesystembasicallydecreasesthesizeofthepurgesystemandthereforedoesnotcreateanewordifferentkindofaccident.Themodificationdoesnotsignificantlyreducethemarginofsafetybecausethecon'sequencesofanyaccidentwiththemini-purgesystemwouldbelessseverethananaccidentassociatedwiththe48inchsystem.Asoutlinedabove,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisamendmentrequestareoutsidethecriteriaof10CFR50.91,andtherefore,anosignificanthazardsfindingiswarranted.Reference1NRCletterfromD.M.CrutchfieldtoR.W.Kober,"CompletionofGenericIssueOnContainmentPurgeandVentOperation"June21,1984.3