ML17244A690

Application for Amend to License DPR-18 Changing Reactor Overpressure Protection Sys Requirements.W/Certificate of Svc & Related Info

ML17244A690
Person / Time
Site:	Ginna
Issue date:	07/17/1979
From:	WHITE L D ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17244A689	List: ML17244A688 ML17244A690
References
NUDOCS 7907230233
Download: ML17244A690 (8)

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UNITEDSTATESOFAMERICANUCLEARREGULATORYCOMMISSIONIntheMatterofRochesterGasandElectricCorporation(R.E.GinnaNuclearPowerPlant,UnitNo.l))))DocketNo.50-244))APPLICATIONFORAMENDMENTTOOPERATINGLICENSEPursuanttoSection50.90oftheregulationsoftheU.S.NuclearRegulatoryCommission(the"Commission"),RochesterGasandElectricCorporation("RG&E"),holderofProvisionalOperatingLicenseNo.DPR-l8,herebyrequeststhattheTechnicalSpecifica-tionssetforthinAppendixAtothatlicensebeamendedtochangereactoroverpressureprotectionsystemrequirements.TheproposedtechnicalspecificationchangeissetforthinAttachmentAtothisApplication.AsafetyevaluationissetforthinAttachmentB.Thisevaluationalsodemonstratesthat,theproposedchangedoesnotinvolveasignificantchangeinthetypesorasignificantincreaseintheamountsofeffluentsoranychangeintheauthorizedpowerlevelofthefacility.Justifi-cationforclassificationoftheamendmentpursuantto10C.F.R.Section170.22isincludedasAttachmentC.AcheckfortheappropriatefeeaccompaniesthisApplication.

WHEREFORE,ApplicantrespectfullyrequeststhatAppendixAtoProvisionalOperatingLicenseNo.DPR-18beamendedintheformattachedheretoasAttachmentA.RochesterGasandElectricCorporationByL.D.Who.,Jr.VicePresident,ElectricandSteamProductionSubscribedandsworntobeforeme'nthisI7dayofJuly,1979.STEPHENKOWBANOTARYPUBLlC,StateofN.Y,MonroeCountyftyCommissionExpiresMarch30,19/17 BEFORETHEUNITEDSTATESNUCLEARREGULATORYCOMMISSIONIntheMatterofROCHESTERGASANDELECTRXCCORPORATION(R.E.GinnaNuclearPowerStation,Unit,No.1))))))DocketNo.50-244)CERTIPXCATEOFSERVICEIherebycertifythatIhaveservedadocumententitled"Applicationfor'AmendmenttoOperatingLicense"withthree(3)documents,AttachmentsA,BandC,attachedthereto,bymailingcopiesthereoffirstclass,postagepre-paid,toeachofthefollowingpersonsthis19thdayofJuly1979:Mr.MichaelL.Slade1250CrownPointDriveWebster,NewYork14580WarrenB.Rosenbaum,EsquireOneMainStreet707WilderBuildingRochester,NewYork14614EdwardG.Ketchen,EsquireOfficeoftheExecutiveLegalDirectorU.S.NuclearRegulatoryCommissionWashington,D.C.20555Mr.RobertN.PickneySupervisorTownofOntario197RidgeRoadWestOntario,NewYork14519 JeffreyL.Cohen,EsquireNewYorkStateEnergyOfficeSwanStreetBuildingCorel,SecondFloorEmpireStatePlazaAlbany,NewYorkl2223EdwardLuton,EsquireAtomicSafetyandLicensingBoardU.S.NuclearRegulatoryCommissionDr.EmmethA.LuebkeAtomicSafetyandLicensingBoardU.S.NuclearRegulatoryCommissionDr.DixonCallihanUnionCarbideCorporationP.O.BoxYOakRidge,Tennessee37830oertS.FaronLeBoeuf,Lamb,Leiby6MacRaeAttorneysforRochesterGasandElectricCorporation ATTACHMENTAOveressureProtectionSstem~ld>>ApplieswheneverthetemperatureofoneormoreoftheRCScoldlegsis<330'F.Ob'ectiveToprevent,overpressurizationofthereactorcoolantsystem.Secification/3.15.1Exceptduringsecondarysidehydrostatictests,atleastoneofthefollowingoverpressureprotectionsystemsshallbeoperable:a~b.Twopressurizerpoweroperatedreliefvalves(PORVs)'ithaliftsettingof<435psig,orAreactorcoolantsystemventof>1.1squareinches.3.15.1.13.15.1.23.15.1.3WithonePORVinoperable',eitherrestoretheinoperablePORVtooperablestatuswithin7daysordepressurizeandventtheRCSthrougha1.1squareinchvent(s)withinthenext8hours;maintaintheRCSinaventedconditionuntilbothPORVshavebeenrestoredtooperablestatus.WithbothPORVsinoperable,depressurizeandventtheRCSthrougha1.1squareinchvent(s)within8hours;maintaintheRCSinaventedconditionuntilbothPORVshavebeenrestoredtooperablestatus.UseoftheoverpressureprotectionsystemtomitigateaRCSpressuretransientshallbereportedinaccordancewith6.9.3.BasisTheoperabilityoftwopressurizerPORVsoranRCSventopeningofgreaterthan1.1squareinchesensuresthattheRCSwillbeprotectedfrompressuretransientswhichcouldexceedthelimitsofAppendixGto10CFRPart50whenoneormoreoftheRCScoldlegsare<330'F.EitherPORVhasadequaterelievingcapabilitytoprotect;theRCSfromoverpressurizationwhenthetransientislimitedtoeither(1)thestartofanidleRCPwiththesecondarywatertemperatureofthesteamgenerator<50'FabovetheRCScoldlegtemperatureor(2)thestartofpsafetyinjectionpumpanditsinjectionintoawatersolidRCS.

References:

(1)L.D.White,Jr.lettertoA.Schwencer,NRC,datedJuly29,19773.15-1Proposed AttachmentBAreactorcoolantsystemOverpressureProtectionSystem(OPS)hasbeeninstalledatR.E.GinnatomitigatepressuretransientsthatmightotherwiseexceedthoselimitswhicharebaseduponAppendixGto10CFRPart50.Thesystemisdesignedtomitigatetransientswhichmayresultfrompersonnelerror,equipmentmal-functionorproceduraldeficiencies.AdescriptionofthissystemwasprovidedinlettersfromMr.L.D.White,Jr.,RochesterGasandElectricCorporation,toMr.A.Schwencer,U.S.NuclearRegulatoryCommission,datedFebruary24,1977,March31,1977,andJuly29,1977.TheOPSwillpreventawatersolidreactorcoolantsystemfromexceedingapressureof535psigforasafetyinjectionpumpdischargingtothereactorcoolantsystem,areactorcoolantpumpstartdischargingtothereactorcoolantsystem,areactorcoolantpumpstartwitha50'Ftemperaturedifferentialbetweentheprimaryandsecondarysystemsorlessseveremassinputorheatinputtransients.Specification3.15requiresthatanoverpressureprotectionsystembeoperablewhenoneormoreoftheRCScoldlegtemperaturesislessthanorequalto330'F.Fortemperaturesgreaterthan330'FtheallowableRCSpressureisgreaterthanthenormalreliefpressureofthetwopressurizerpoweroperatedreliefvalvessothatnootheroverpressureprotectionisrequired.Below330'FeachofthePORVs,usingalowpressuresetpointof435psig,willmitigatethelimitingmassinputandheatinputpressuretransientsinawater-solidRCS.ThesinglesetpointwasestablishedtopreventexceedingtheallowableRCSpressureat100'Fanddoesnotprovideforpressureincreaseswhichwouldnormallybeacceptablewithincreasingtemperature.GinnaStationhasadministrativelylimitedthepressuredif-ferentialfromthesecondarysidetotheprimarysideofthesteamgeneratorsto800psid.Thislimithasbeenimposedtolimitstressesplacedonthesteamgeneratorwhichmaycausecladdingintheprimarychannelheadtoseparatefromthebasemetal.AlthoughGinnahasneverexperiencedcladdingseparation,severalotherplantsofthesamevintagedidintheirearlyoperatinghistory.The800psidpressurelimitationisconsideredawiseandprudentprecautiontolimitthepotentialfordifficultrepairsinahighradiationarea.Duringsecondarysidehydrostatictestingtherequirementsforhighsecondarysidepressure,limitedRCSpressureduetoOPSopera-tionandamaximum800psidifferentialpressurearemutuallyexclusive.TheOPSisneededonlyintheunlikelyeventofapressuretransient.DuringinfrequentsecondarysidehydrostatictestsextraprecautionscanbeimplementedtopreventpressuretransientswiththeOPSdeactivatedandtoallowcompliancewiththeotherconstraintsplaceduponthesteamgenerators.

DuringnormaloperationwhentheOPSisrequiredtobeoperable,amaximumofonesafetyinjectionpumpisallowedtobeoperabletoassurethatamassadditionpressuretransientcanberelievedbyasinglePORV.Duringthesecondarysidehydrostatictestnosafetyinjectionpumpswillbeallowedtooperate.TheOPSwillmitigatetheeffectsofareactorcoolantpumpstartwiththesecondarysideofthesteamgeneratorsatleast50'Fwarmerthanthereactorcoolantsystem.Priortothesecondarysidehydrostatictestthetemperaturedifferentialwillbeminimizedbothtoaidintheperformanceofthetestandtopreventapressuretransientintheeventofaninadvertentreactorcoolantpumpstart.TheexistinglimitationsontheoperationofthechargingpumpswhentheRCSisbeingcooledbytheRHRsystemwithouttheOPSoperablewillbefollowed.Theselimitationswillpreventin-advertentoverpressurizationoftheRHRsystemshouldletdownbeterminated.TheOPShasnotbeenchallengedatGinnaStation.EtwillbeoperablebeforeandafterthesecondarysidehydrostatictestasrequiredbytheRCStemperature.DuringthehydrostatictestwhentheOPSisnotoperablethenormaloperationsshiftwillbesupplementedbyanadditionallicensedoperator.Thisoperatorwillbechargedwiththeresponsibilityofassuringthatalltheadministrativecontrolsandprecautionsnecessarytopreventoverpressuretransientswillbeobserved.Thus,thereisadequateassurancethatapressuretransientwillnotoccurduringasecondarysidehydrostatictestandthatthetestcanbesafelyperformedwithouttheOPSoperable.

AttachmentCTheproposedAmendmenttotheProvisionalOperatingLicensehasbeenevaluatedanddeterminedtofallwithinthedefinitionofClassIIIof10C.F.R.Section170.22therebyrequiringafeeof$4,000.Theproposedamendmentdealswithasinglesafetyissue,over-pressureprotectionofthereactorvessel.TheissuehasbeenclearlyidentifiedbyanNRCposition.