ML17254A603

Proposed Tech Specs,Incorporating New Containment mini-purge Sys & Deleting Requirements Associated W/Old 48-inch Containment Purge Sys

ML17254A603
Person / Time
Site:	Ginna
Issue date:	10/22/1985
From:	ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17254A600	List: ML17254A599 ML17254A601 ML17254A603
References
NUDOCS 8510220379
Download: ML17254A603 (21)

Text

Attachment ARevisetheTechnical Specification pagesasfollows: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,Radiation AccidentMonitorin Instrumentation Instrument 1.Containment Area(R-29andR-30)2.NobleGasEffluentMonitorsMinimumChannels~OerableActionPlantVent(R-14)ii.AMainSteamLine(R-31)iii.BMainSteamLine(R-32)iv.Containment Purge(R-12A)v~AirEjector(R-15A)ActionStatements Action1-WiththenumberofoperablechannelslessthanrequiredbytheMinimumChannelsOperablerequirements, eitherrestoretheinoperable channel(s) tooperablestatuswithin7daysoftheevent,orprepareandsubmitaSpecialReporttotheCommission within30daysfollowing theeventoutlining theactiontaken,thecauseoftheinoperability andtheplansandscheduleforrestoring thesystemtooperablestatus.*onlywhentheshutdownpurgesystemflangesareremoved.3.5-22Proposed IIIlttklllk11' PENT.NO.121121121121123124124..125126127128e129g130131132140IDENTIFICATION/DESCRIPTION NitrogentoPRTReactorMakeupwatertoPRTCont.Press.transmitter PT-945(10)Cont.Press.transmitter PT-946(10)ReactorCoolantDrainTank(RCDT)to(RExcessletdownsupplyandreturntoheatexchanger PostAccidentairsample"C"fanCanponent GoolingWater(CW)fran1BRCPQOWfran1ARCPRCDT8(PRTtoVentHeaderE-CCWtoreactorsupportcoolingQOWtoreactorsupportcoolingblini-Purge exhaust--RHRpumpsuctionfran"A"HotlegISOZATION BOUNDARYCV528CV529PT945PT946AOV1789AOV745CV743MV1569MV1572MOV759BMOV759ACV750ACV750BAOV1787CV1713MOV813MOV814AOV7970MOV701(20)MAXKMUMISOZATION TIME*(SEC)6060606060ISOZATION BOUNDAHYMV547(8)AOV508MV1819AMV1819BMV1655(7)MV1571MV1574(12)(12)MOV749AMOV749BAQV1786(19)AOV7971(6)MMGMUMISOZATION TIME*(SEC)60606060 1L0lIIit'h1'Il71III PENT.NO.1411421432012022032032042052062062070207209210IDENTIFICATION/DESCRIPTION RHR-//1pumpsuctionfromSumpBRHR-jj2pumpsuctionfromSumpBRCDTpumpsuctionReactorCompart.coolingUnitA6B"B"Hydrogenrecombiner (pilot6main)Contain,Press.transmitter PT-947S948Postaccidentairsampleto"B"fanShutdownPurgeSupplyDuctHotlegloopsampleZrzr.liquidspacesample"A"S/GsamplePrzr.Steamspacesample"B"S/GsampleReactorCompart.coolingUnitsA8BOxygenmakeuptoA8Brecombiners ISOLATION BOUNDARYMOV850A(13)MOV850B(13)AOV1721MV4757(16)MV4636(16)MV1076BMV1084BPT947PT948MV1563MV1566flange(22)AOV966CAOV966BAOV5735AOV966AAOV5736MV4758(16)MV4635(16)MV1080AMAXIMUMISOLATION TIME='(SEC)NANA60NANANANANANANANANA6060606060NANANAISOLATION BOUNDARYMOV851A(13)MOV851B(13)AOV1003AAOV1003BSOVIV-3BSOVIV-5BMV1819CMV1819DMV1565MV1568AOV5869(22)MV956D(14)MV956E(14)MV5733(7)MV956FMV5734(7)SOVIV-2ASOVIV-2BCHAXIMUMISOLATION TIME"-(SEC)-.NANA6060NANANormallyClosedNANormally'ClosedNANANANANANANANA.NANANANANormallyClosedNANormallyClosed 0,ur."f PENT.No.3003013033043053053053073083093103100~o311312313IDENTIFICATION/DESCRIPTION ShutdownPurgeExhaustDuctAux.steamsupplytocontainment Aux.steamcondensate return"A"Hydrogenrecombiner (pilotandmain)Radiation MonitorsR-ll,R-12SR-10AAutoInletIsol.R-ll,R-12SR-10AOutletPostAccidentairsampler(containment)

FireServiceWaterServiceWaterto"A"fancoolerMini-Purge supplyServiceAirtoContain.Instrument AirtoContain.ServiceWaterfrom"B"fancoolerServiceWaterto"D"fancoolerIeakagetestdepressurization ISOLATION BOUNDARYflange(22)MV6151MV6175MV1084BMV1076AAOV1597AOV1599MV1554MV1557MV1560CV9229MV4627(16)AOV7478CV7226CV5393MV4630(16)MV4642(16)flange60AOV1598MV1556MV1559MV1562'tNA-AOV9227NANANANANANAAOV7445MV7141AOV5392NANAMOV7444MAXIMUMIsoLAnom--IsoLAnoN TIME"(SEC)BOUNDARYNAAOV5879(22)NA-MV6165(15)NA-MV6152(15)NASOVIV-5ANA.-SOVXV-3A60~MV1596MAXIMUMIsoI,Anom TIME"(SEC)NANANANormallly Clos~NANormaU.ly Clo~NA6060NANA(18)NANA60NANA.NANormallyClosed

PENT.NO.316317318320321~322323324332332IDENTIFICATION/DESCBIPTION ServiceWaterfran"C"fancoolerServiceWaterto"B"fancoolerLeakagetestsupplyDeadweighttester(deccmissioned)

ServiceWaterfrcm"A"fancoolerServicewaterto"C"fancoolerAS/GBlmrdownBS/GBlcwdownServiceWaterfrcm"D"fancoolerDemineralized watertoContainment Cont.Press.Trans.PT-944,9496950Leakagetestandhydrogenmnitorinstrumentation linesISOZATION MV4643(16)MV4628(16)flangeweldedshutMV4629(16)MV4647(16)AOV5738AOV5737MV4644(16)CV8419PT944PT949PT950MV7448MV7452MV7456SOV921SOV922SOV923SOV924MAXIMUMISOZATION TIME*(SEC)6060MOV7443weldedshutMV5701(7)MV5702(7)AOV8418MV1819GMV1819FMV1819Ecapcapcap(21)(21)(21)(21)MAXDIUMISOZATION TIME*(SEC)Nh.NormallyClosed.0 II1h1IIKI.h.htItrII,"II75()~)IItt(,/~(>>~~'v/t)pI<-45C4I/1(c'CIF' (21)Acceptable isolation capability isprovidedforinstrument linesbytwoisolation boundaries outsidecontainment.

Oneoftheboundaries outsidecontainment maybeaSeismicClass1closedsystemwhichissubjected toTypeCleakratetesting.(22)Theflangesatpenetrations 204and300canonlyberemovedatcoldorrefueling shutdown.

Theflangesandassociated doublesealsprovidecontainment isolation andareacontainment boundaryforallmodesofoperation betweencoldshutdownandnormaloperation.

Duringcoldandrefueling shutdownwhentheflangesareremovedintegrity isprovidedbythe48inchvalves.3.6-11Proposed IIJIIf.~),ItJw"IIdr4,>>IIl~d'X)A~U~',k~'V/4

~v3.8REFUEZING Alicabilit 3.8.1Appliestooperating limitations duringrefueling operations.

~b'oensurethatnoincidentcouldoccurduringrefueling operations thatwouldaffectpublichealthandsafety.Duringrefueling operations thefollowing conditions shallbesatisfied.

a~Theequipment door,oraclosureplatethatrestricts airflowfromthecontainment, andatleastonepersonnel doorintheequipment doororclosureplateandinthepersonnel airlockshallbeproperlyclosed.Inaddition, allautomatic containment isolation valvesshallbeb.operableoratleastonevalveineachlineIshallbe',locked closed.The"48inch"shutdown ltpurgevalvesmustalsobeoperableorclosedortheassociated flangemustbeinstalled'.

IIRadiation levelsinthecontainment shallbec~monitored continuously.

Coresubcritical neutronfluxshallbecontin-uouslymonitored byatleasttwosourcerangeneutronmonitors, eachwithcontinuous visual.indication inthecontrolroomandonewithaudibleindication inthecontairpnent andcontrolroomavailable whenevercoregeometryisbeingchanged.Whencoregeometryisnotbeingchangedat3.8-1Proposed vshutdownanddepressurized untilrepairsareeffectedandthelocalleakagemeetstheacceptance criterion.

4.4.2.4TestFreuenca~b.~'i<ciExceptasspecified inb.,c.,andd.below,individual penetrations andcontainment isolation valvesshallbetestedduringeachreactorshutdownforrefueling, orotherconvenient intervals, butinnocaseat,intervals greaterthantwoyears.Thecontainment equipment hatch,fueltransfertube,andshutdownpurgesystemflangesshallbentestedateachrefueling shutdownoraftereachuse,if,that.besooner.t(~',-The,containment,air'o'cks'hall betestedat,intervals ofnomorethansixmonthsbypressurizing thespacebetweentheairlockdoors.Inaddition, following openingoftheairlockdoorduringtheinterval, atestshallbeperformed bypressurizing betweenthedualsealsofeachdooropened,within48hoursoftheopening,unlessthereactorwasinthecoldshutdowncondition atthetimeoftheopeningorhasbeensubsequently broughttothecoldshutdowncondition.

Atestshallalsobeperformed bypressurizing betweenthedualsealsofeachdoorwithin48hoursofleavingthecoldshutdowncondition, unlessthedoorshavenotbeenopensincethelasttestperformed eitherbypressurizing thespacebetweentheairlockdoorsorbypressurizing betweenthedualdoorseals.4.4-7Proposed 4.4.3Recirculation eteovlSstems4.4.3.1Testa~Theportionoftheresidualheatremovalsystemthatisoutsidethecontainment shalleitherbetestedbyuseinnormaloperation orhydrostati-callytestedat350psigattheintervalspecified in4.4.3.4.b.Suctionpipingfromcontainment sumpBtothereactorcoolantdraintankpumpandthedischarge pipingfromthepumpstotheresidualheatremovalsystemshallbehydrostatically gestedatgolessthat100psigattheintervalspecified

)in$.4.3.4.4.4-,8Proposed Attachment BContainment purgeandventoperations becameagenericconcernin1978.Sincethattimecontainment purgeandventhasbeenthesubjectofmanylettersbetweentheStaffandRochester GasandElectricCorp.(RG&E).InReference 1,theStafftransmitted toRGSEaSafetyEvaluation Report(SER)whichfoundRGE'sinteriumcommitments tobeacceptable.

TheSERprovidesagoodsummaryofthecorrespondance andthecommitments madeconcerning thissubject.TheexistingpurgeandventsystemsatGinnaconsistofa48inchpurgesystemanda6inchcontainment vent(depressurization) system.Themajorissueconcerning thepurgesystemistheoperability ofthe48inchpurgevalvesduringadesignbasisaccident-lossofcoolantaccident(DBA-LOCA).

Therefore, RGGEhascommitted tomaintaining the48inchpurgevalvesclosedwhilethereactoriscriticaluntilinformation demonstrating operability issubmitted.

InresponsetotheStaff'srequesttolimitpurge/vent operations tosafety-related needsRG6Ecommitted tolimitingventsystemoperation toatotalof90hoursperyear.Topermanently resolvethepurgeandventissueRG6Ehasdecidedtomodifythe48inchpurgesystemsothatitwillonlybeusedwhenthereactorisincoldorrefueling

shutdown, andinstallamini-purge systemwhichwillallowunlimited purgingofcontainment.

Thetechnical specification changespresented inAttachment Aarenecessary toimplement thesemodifications.

Thefollowing changeswillbemadetothe48inchpurgesystem:Theinboard48inch,butterfly-type containment isolation valvesfromboththesupplyandexhaustlineswillberemoved.Eachvalvewillbereplacedwitha,specialblind-flange typeclosureutilizing double0-ringsealstoprovideredundant containment isolation barriers.

Testportswillbeprovided.to permitperi-odiclocalleakratetestingofthedouble,O-ring seal."Theblindflangeclosureswillbesecurelybolted,in place,,dur'ing

.reactoroperation andwillonlybe'removed duringplantshutdowns.

Theexistingoutboard48inch,butterfly-type automatic containment.

isolation valveswillremaininplacetoprovideanisolation barrierduringrefueling operations.

Sincetheblankflangeshaveadoubleseal,itwillnolongerbenecessary torelyontheouter48inchvalvesforcontainment isolation duringpoweroperation.

Duringcoldorrefueling

shutdown, theflangescouldberemovedandtheoutervalveswillberelieduponforrefueling integrity.

Sincethe48inchvalvesarenolongerrelieduponforcontainment integrity themechanical stopsonthevalveswillberemoved.Thesestopswereinstalled toreducestressesinthevalvesresulting fromclosureduringaDBA-LOCA.

Sincethevalves'arenolongersubjecttoaDBA-LOCAthereisnoreasontocontinuerestricting airflowinthe48inchsystemduringshutdown.

IIMIIIIII'tII Anewmini-purge systemwillbeinstalled toprovidethecapability topurgecontainment atmosphere duringallmodesofreactor'peration.

This2000-cfmmini-purge systemwillconsistofapairofredundant blowersforsupplying'air tothecontainment throughexisting6-inchIntegrated LeakRateTest(ILRT)ventlinepenetration 309."New6i*nch,air'-.operated, butterfly-type, inboardandoutboar'd automatic containment isolation valveswillbeinstalled atpenetration 309.Airwillbeexhausted throughtheexisting6inchdepressurization penetration 132andwillbeductedintotheAuxiliary Buildingventilation systemwhereitwillbefilteredandmonitored priortoitsreleasetotheenvi-ronmentviatheplantvent.Theexisting6inchvalvesatpene-tration132willbereplacedwithnew8inch,air-operated, butterfly-type, inboardandoutboardcontainment.

isolation valves.Allfournewcontainment isolation valveswillbeautomatic andwillbefully-qualified toclosewithin5secondsfromthetimetheisolation setpointisreachedagainstthemaximumcontainment pressures anticipated duringaDBA-LOCA.

Theinboardendsofthemini-purge supplyandexhaustlineswillbeequippedwith1/2-inchmeshdebrisscreens.Theradiation accidentmonitorR-12A(Containment Purge)monitorsthe48inchpurgeexhaust.Sincethe48inchpurgewillonlybeoperableduringcoldandrefueling

shutdown, R-12Aneedonlybeoperableduringcoldandrefueling shutdown.

Therefore, Table3.5-7wasmodifiedtobeconsistant withoperation oftheshutdownpurgesystem.Inaccordance with10CFR50.91,thesechangestotheTechnical Specifications havebeenevaluated againstthreecriteriatodetermine iftheoperation ofthefacilityinaccordance withproposedamendment would:1.involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated; or2.createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated; or3.involveasignificant reduction inamarginofsafety.Themodification doesnotinvolveanincreaseintheprobability orconsequences ofanaccidentpreviously evaluated.

Installing amini-purge systemandinstalling flangesonthe48inchvalvesdoesnotincreasetheprobability ofanaccidentbecausetheflangeseliminate theeffectsofanymalfunction ofthe48inchvalvesandthenewmini-purge valvesaresmallandinherently morereliablethanthe48.inchvalves.Theconsequences ofanypreviously evaluated accidentarenotincreased bythemodification becausetheflangespreventanyaccidentassociated withthe48inchsystemandclearlyanyaccidentassociated withthemini-purge systemislesslimitingthananaccidentassociated withthe48inchsytem.

0~VIfIklil,I'l';tbblfP Themodification doesnotcreatethepossibility ofanewordifferent kindofaccident.

Replacing the48inchpurgesystemwithamini-purge systembasically decreases thesizeofthepurgesystemandtherefore doesnotcreateanewordifferent kindofaccident.

Themodification doesnotsignificantly reducethemarginofsafetybecausethecon'sequences ofanyaccidentwiththemini-purge systemwouldbelessseverethananaccidentassociated withthe48inchsystem.Asoutlinedabove,Rochester GasandElectricsubmitsthattheissuesassociated withthisamendment requestareoutsidethecriteriaof10CFR50.91,andtherefore, anosignificant hazardsfindingiswarranted.

Reference 1NRCletterfromD.M.Crutchfield toR.W.Kober,"Completion ofGenericIssueOnContainment PurgeandVentOperation" June21,1984.3