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{{#Wiki_filter: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.
{{#Wiki_filter:UNITEDSTATESOFAMERICANUCLEARREGULATORY COMMISSION IntheMatterofRochester GasandElectricCorporation (R.E.GinnaNuclearPowerPlant,UnitNo.l))))DocketNo.50-244))APPLICATION FORAMENDMENT TOOPERATING LICENSEPursuanttoSection50.90oftheregulations oftheU.S.NuclearRegulatory Commission (the"Commission"
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.
),Rochester GasandElectricCorporation
("RG&E"),
holderofProvisional Operating LicenseNo.DPR-l8,herebyrequeststhattheTechnical Specifica-tionssetforthinAppendixAtothatlicensebeamendedtochangereactoroverpressure protection systemrequirements.
Theproposedtechnical specification changeissetforthinAttachment AtothisApplication.
Asafetyevaluation issetforthinAttachment B.Thisevaluation alsodemonstrates that,theproposedchangedoesnotinvolveasignificant changeinthetypesorasignificant increaseintheamountsofeffluents oranychangeintheauthorized powerlevelofthefacility.
Justifi-cationforclassification oftheamendment pursuantto10C.F.R.Section170.22isincludedasAttachment C.Acheckfortheappropriate feeaccompanies thisApplication.
WHEREFORE, Applicant respectfully requeststhatAppendixAtoProvisional Operating LicenseNo.DPR-18beamendedintheformattachedheretoasAttachment A.Rochester GasandElectricCorporation ByL.D.Who.,Jr.VicePresident, ElectricandSteamProduction Subscribed andsworntobeforeme'nthisI7dayofJuly,1979.STEPHENKOWBANOTARYPUBLlC,StateofN.Y,MonroeCountyftyCommission ExpiresMarch30,19/17 BEFORETHEUNITEDSTATESNUCLEARREGULATORY COMMISSION IntheMatterofROCHESTER GASANDELECTRXCCORPORATION (R.E.GinnaNuclearPowerStation,Unit,No.1))))))DocketNo.50-244)CERTIPXCATE OFSERVICEIherebycertifythatIhaveservedadocumententitled"Application for'Amendment toOperating License"withthree(3)documents, Attachments A,BandC,attachedthereto,bymailingcopiesthereoffirstclass,postagepre-paid, toeachofthefollowing personsthis19thdayofJuly1979:Mr.MichaelL.Slade1250CrownPointDriveWebster,NewYork14580WarrenB.Rosenbaum, EsquireOneMainStreet707WilderBuildingRochester, NewYork14614EdwardG.Ketchen,EsquireOfficeoftheExecutive LegalDirectorU.S.NuclearRegulatory Commission Washington, D.C.20555Mr.RobertN.PickneySupervisor TownofOntario197RidgeRoadWestOntario,NewYork14519 JeffreyL.Cohen,EsquireNewYorkStateEnergyOfficeSwanStreetBuildingCorel,SecondFloorEmpireStatePlazaAlbany,NewYorkl2223EdwardLuton,EsquireAtomicSafetyandLicensing BoardU.S.NuclearRegulatory Commission Dr.EmmethA.LuebkeAtomicSafetyandLicensing BoardU.S.NuclearRegulatory Commission Dr.DixonCallihanUnionCarbideCorporation P.O.BoxYOakRidge,Tennessee 37830oertS.FaronLeBoeuf,Lamb,Leiby6MacRaeAttorneys forRochester GasandElectricCorporation ATTACHMENT AOveressureProtection Sstem~ld>>Applieswheneverthetemperature ofoneormoreoftheRCScoldlegsis<330'F.Ob'ectiveToprevent,overpressurization ofthereactorcoolantsystem.Secification
/3.15.1Exceptduringsecondary sidehydrostatic tests,atleastoneofthefollowing overpressure protection systemsshallbeoperable:
a~b.Twopressurizer poweroperatedreliefvalves(PORVs)'ith aliftsettingof<435psig,orAreactorcoolantsystemventof>1.1squareinches.3.15.1.13.15.1.23.15.1.3WithonePORVinoperable',
eitherrestoretheinoperable PORVtooperablestatuswithin7daysordepressurize andventtheRCSthrougha1.1squareinchvent(s)withinthenext8hours;maintaintheRCSinaventedcondition untilbothPORVshavebeenrestoredtooperablestatus.WithbothPORVsinoperable, depressurize andventtheRCSthrougha1.1squareinchvent(s)within8hours;maintaintheRCSinaventedcondition untilbothPORVshavebeenrestoredtooperablestatus.Useoftheoverpressure protection systemtomitigateaRCSpressuretransient shallbereportedinaccordance with6.9.3.BasisTheoperability oftwopressurizer PORVsoranRCSventopeningofgreaterthan1.1squareinchesensuresthattheRCSwillbeprotected frompressuretransients whichcouldexceedthelimitsofAppendixGto10CFRPart50whenoneormoreoftheRCScoldlegsare<330'F.EitherPORVhasadequaterelieving capability toprotect;theRCSfromoverpressurization whenthetransient islimitedtoeither(1)thestartofanidleRCPwiththesecondary watertemperature ofthesteamgenerator
<50'FabovetheRCScoldlegtemperature or(2)thestartofpsafetyinjection pumpanditsinjection intoawatersolidRCS.


==References:==
==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.
(1)L.D.White,Jr.lettertoA.Schwencer, NRC,datedJuly29,19773.15-1Proposed Attachment BAreactorcoolantsystemOverpressure Protection System(OPS)hasbeeninstalled atR.E.Ginnatomitigatepressuretransients thatmightotherwise exceedthoselimitswhicharebaseduponAppendixGto10CFRPart50.Thesystemisdesignedtomitigatetransients whichmayresultfrompersonnel error,equipment mal-functionorprocedural deficiencies.
AttachmentCTheproposedAmendmenttotheProvisionalOperatingLicensehasbeenevaluatedanddeterminedtofallwithinthedefinitionofClassIIIof10C.F.R.Section170.22therebyrequiringafeeof$4,000.Theproposedamendmentdealswithasinglesafetyissue,over-pressureprotectionofthereactorvessel.TheissuehasbeenclearlyidentifiedbyanNRCposition.}}
Adescription ofthissystemwasprovidedinlettersfromMr.L.D.White,Jr.,Rochester GasandElectricCorporation, toMr.A.Schwencer, U.S.NuclearRegulatory Commission, datedFebruary24,1977,March31,1977,andJuly29,1977.TheOPSwillpreventawatersolidreactorcoolantsystemfromexceeding apressureof535psigforasafetyinjection pumpdischarging tothereactorcoolantsystem,areactorcoolantpumpstartdischarging tothereactorcoolantsystem,areactorcoolantpumpstartwitha50'Ftemperature differential betweentheprimaryandsecondary systemsorlessseveremassinputorheatinputtransients.
Specification 3.15requiresthatanoverpressure protection systembeoperablewhenoneormoreoftheRCScoldlegtemperatures islessthanorequalto330'F.Fortemperatures greaterthan330'Ftheallowable RCSpressureisgreaterthanthenormalreliefpressureofthetwopressurizer poweroperatedreliefvalvessothatnootheroverpressure protection isrequired.
Below330'FeachofthePORVs,usingalowpressuresetpointof435psig,willmitigatethelimitingmassinputandheatinputpressuretransients inawater-solid RCS.Thesinglesetpointwasestablished topreventexceeding theallowable RCSpressureat100'Fanddoesnotprovideforpressureincreases whichwouldnormallybeacceptable withincreasing temperature.
GinnaStationhasadministratively limitedthepressuredif-ferential fromthesecondary sidetotheprimarysideofthesteamgenerators to800psid.Thislimithasbeenimposedtolimitstressesplacedonthesteamgenerator whichmaycausecladdingintheprimarychannelheadtoseparatefromthebasemetal.AlthoughGinnahasneverexperienced claddingseparation, severalotherplantsofthesamevintagedidintheirearlyoperating history.The800psidpressurelimitation isconsidered awiseandprudentprecaution tolimitthepotential fordifficult repairsinahighradiation area.Duringsecondary sidehydrostatic testingtherequirements forhighsecondary sidepressure, limitedRCSpressureduetoOPSopera-tionandamaximum800psidifferential pressurearemutuallyexclusive.
TheOPSisneededonlyintheunlikelyeventofapressuretransient.
Duringinfrequent secondary sidehydrostatic testsextraprecautions canbeimplemented topreventpressuretransients withtheOPSdeactivated andtoallowcompliance withtheotherconstraints placeduponthesteamgenerators.
Duringnormaloperation whentheOPSisrequiredtobeoperable, amaximumofonesafetyinjection pumpisallowedtobeoperabletoassurethatamassadditionpressuretransient canberelievedbyasinglePORV.Duringthesecondary sidehydrostatic testnosafetyinjection pumpswillbeallowedtooperate.TheOPSwillmitigatetheeffectsofareactorcoolantpumpstartwiththesecondary sideofthesteamgenerators atleast50'Fwarmerthanthereactorcoolantsystem.Priortothesecondary sidehydrostatic testthetemperature differential willbeminimized bothtoaidintheperformance ofthetestandtopreventapressuretransient intheeventofaninadvertent reactorcoolantpumpstart.Theexistinglimitations ontheoperation ofthechargingpumpswhentheRCSisbeingcooledbytheRHRsystemwithouttheOPSoperablewillbefollowed.
Theselimitations willpreventin-advertent overpressurization oftheRHRsystemshouldletdownbeterminated.
TheOPShasnotbeenchallenged atGinnaStation.Etwillbeoperablebeforeandafterthesecondary sidehydrostatic testasrequiredbytheRCStemperature.
Duringthehydrostatic testwhentheOPSisnotoperablethenormaloperations shiftwillbesupplemented byanadditional licensedoperator.
Thisoperatorwillbechargedwiththeresponsibility ofassuringthatalltheadministrative controlsandprecautions necessary topreventoverpressure transients willbeobserved.
Thus,thereisadequateassurance thatapressuretransient willnotoccurduringasecondary sidehydrostatic testandthatthetestcanbesafelyperformed withouttheOPSoperable.
Attachment CTheproposedAmendment totheProvisional Operating Licensehasbeenevaluated anddetermined tofallwithinthedefinition ofClassIIIof10C.F.R.Section170.22therebyrequiring afeeof$4,000.Theproposedamendment dealswithasinglesafetyissue,over-pressureprotection ofthereactorvessel.Theissuehasbeenclearlyidentified byanNRCposition.}}

Revision as of 15:02, 29 June 2018

Application for Amend to License DPR-18 Changing Reactor Overpressure Protection Sys Requirements.W/Certificate of Svc & Related Info
ML17244A690
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/17/1979
From: WHITE L D
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17244A689 List:
References
NUDOCS 7907230233
Download: ML17244A690 (8)
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Text

UNITEDSTATESOFAMERICANUCLEARREGULATORY COMMISSION IntheMatterofRochester GasandElectricCorporation (R.E.GinnaNuclearPowerPlant,UnitNo.l))))DocketNo.50-244))APPLICATION FORAMENDMENT TOOPERATING LICENSEPursuanttoSection50.90oftheregulations oftheU.S.NuclearRegulatory Commission (the"Commission"

),Rochester GasandElectricCorporation

("RG&E"),

holderofProvisional Operating LicenseNo.DPR-l8,herebyrequeststhattheTechnical Specifica-tionssetforthinAppendixAtothatlicensebeamendedtochangereactoroverpressure protection systemrequirements.

Theproposedtechnical specification changeissetforthinAttachment AtothisApplication.

Asafetyevaluation issetforthinAttachment B.Thisevaluation alsodemonstrates that,theproposedchangedoesnotinvolveasignificant changeinthetypesorasignificant increaseintheamountsofeffluents oranychangeintheauthorized powerlevelofthefacility.

Justifi-cationforclassification oftheamendment pursuantto10C.F.R.Section170.22isincludedasAttachment C.Acheckfortheappropriate feeaccompanies thisApplication.

WHEREFORE, Applicant respectfully requeststhatAppendixAtoProvisional Operating LicenseNo.DPR-18beamendedintheformattachedheretoasAttachment A.Rochester GasandElectricCorporation ByL.D.Who.,Jr.VicePresident, ElectricandSteamProduction Subscribed andsworntobeforeme'nthisI7dayofJuly,1979.STEPHENKOWBANOTARYPUBLlC,StateofN.Y,MonroeCountyftyCommission ExpiresMarch30,19/17 BEFORETHEUNITEDSTATESNUCLEARREGULATORY COMMISSION IntheMatterofROCHESTER GASANDELECTRXCCORPORATION (R.E.GinnaNuclearPowerStation,Unit,No.1))))))DocketNo.50-244)CERTIPXCATE OFSERVICEIherebycertifythatIhaveservedadocumententitled"Application for'Amendment toOperating License"withthree(3)documents, Attachments A,BandC,attachedthereto,bymailingcopiesthereoffirstclass,postagepre-paid, toeachofthefollowing personsthis19thdayofJuly1979:Mr.MichaelL.Slade1250CrownPointDriveWebster,NewYork14580WarrenB.Rosenbaum, EsquireOneMainStreet707WilderBuildingRochester, NewYork14614EdwardG.Ketchen,EsquireOfficeoftheExecutive LegalDirectorU.S.NuclearRegulatory Commission Washington, D.C.20555Mr.RobertN.PickneySupervisor TownofOntario197RidgeRoadWestOntario,NewYork14519 JeffreyL.Cohen,EsquireNewYorkStateEnergyOfficeSwanStreetBuildingCorel,SecondFloorEmpireStatePlazaAlbany,NewYorkl2223EdwardLuton,EsquireAtomicSafetyandLicensing BoardU.S.NuclearRegulatory Commission Dr.EmmethA.LuebkeAtomicSafetyandLicensing BoardU.S.NuclearRegulatory Commission Dr.DixonCallihanUnionCarbideCorporation P.O.BoxYOakRidge,Tennessee 37830oertS.FaronLeBoeuf,Lamb,Leiby6MacRaeAttorneys forRochester GasandElectricCorporation ATTACHMENT AOveressureProtection Sstem~ld>>Applieswheneverthetemperature ofoneormoreoftheRCScoldlegsis<330'F.Ob'ectiveToprevent,overpressurization ofthereactorcoolantsystem.Secification

/3.15.1Exceptduringsecondary sidehydrostatic tests,atleastoneofthefollowing overpressure protection systemsshallbeoperable:

a~b.Twopressurizer poweroperatedreliefvalves(PORVs)'ith aliftsettingof<435psig,orAreactorcoolantsystemventof>1.1squareinches.3.15.1.13.15.1.23.15.1.3WithonePORVinoperable',

eitherrestoretheinoperable PORVtooperablestatuswithin7daysordepressurize andventtheRCSthrougha1.1squareinchvent(s)withinthenext8hours;maintaintheRCSinaventedcondition untilbothPORVshavebeenrestoredtooperablestatus.WithbothPORVsinoperable, depressurize andventtheRCSthrougha1.1squareinchvent(s)within8hours;maintaintheRCSinaventedcondition untilbothPORVshavebeenrestoredtooperablestatus.Useoftheoverpressure protection systemtomitigateaRCSpressuretransient shallbereportedinaccordance with6.9.3.BasisTheoperability oftwopressurizer PORVsoranRCSventopeningofgreaterthan1.1squareinchesensuresthattheRCSwillbeprotected frompressuretransients whichcouldexceedthelimitsofAppendixGto10CFRPart50whenoneormoreoftheRCScoldlegsare<330'F.EitherPORVhasadequaterelieving capability toprotect;theRCSfromoverpressurization whenthetransient islimitedtoeither(1)thestartofanidleRCPwiththesecondary watertemperature ofthesteamgenerator

<50'FabovetheRCScoldlegtemperature or(2)thestartofpsafetyinjection pumpanditsinjection intoawatersolidRCS.

References:

(1)L.D.White,Jr.lettertoA.Schwencer, NRC,datedJuly29,19773.15-1Proposed Attachment BAreactorcoolantsystemOverpressure Protection System(OPS)hasbeeninstalled atR.E.Ginnatomitigatepressuretransients thatmightotherwise exceedthoselimitswhicharebaseduponAppendixGto10CFRPart50.Thesystemisdesignedtomitigatetransients whichmayresultfrompersonnel error,equipment mal-functionorprocedural deficiencies.

Adescription ofthissystemwasprovidedinlettersfromMr.L.D.White,Jr.,Rochester GasandElectricCorporation, toMr.A.Schwencer, U.S.NuclearRegulatory Commission, datedFebruary24,1977,March31,1977,andJuly29,1977.TheOPSwillpreventawatersolidreactorcoolantsystemfromexceeding apressureof535psigforasafetyinjection pumpdischarging tothereactorcoolantsystem,areactorcoolantpumpstartdischarging tothereactorcoolantsystem,areactorcoolantpumpstartwitha50'Ftemperature differential betweentheprimaryandsecondary systemsorlessseveremassinputorheatinputtransients.

Specification 3.15requiresthatanoverpressure protection systembeoperablewhenoneormoreoftheRCScoldlegtemperatures islessthanorequalto330'F.Fortemperatures greaterthan330'Ftheallowable RCSpressureisgreaterthanthenormalreliefpressureofthetwopressurizer poweroperatedreliefvalvessothatnootheroverpressure protection isrequired.

Below330'FeachofthePORVs,usingalowpressuresetpointof435psig,willmitigatethelimitingmassinputandheatinputpressuretransients inawater-solid RCS.Thesinglesetpointwasestablished topreventexceeding theallowable RCSpressureat100'Fanddoesnotprovideforpressureincreases whichwouldnormallybeacceptable withincreasing temperature.

GinnaStationhasadministratively limitedthepressuredif-ferential fromthesecondary sidetotheprimarysideofthesteamgenerators to800psid.Thislimithasbeenimposedtolimitstressesplacedonthesteamgenerator whichmaycausecladdingintheprimarychannelheadtoseparatefromthebasemetal.AlthoughGinnahasneverexperienced claddingseparation, severalotherplantsofthesamevintagedidintheirearlyoperating history.The800psidpressurelimitation isconsidered awiseandprudentprecaution tolimitthepotential fordifficult repairsinahighradiation area.Duringsecondary sidehydrostatic testingtherequirements forhighsecondary sidepressure, limitedRCSpressureduetoOPSopera-tionandamaximum800psidifferential pressurearemutuallyexclusive.

TheOPSisneededonlyintheunlikelyeventofapressuretransient.

Duringinfrequent secondary sidehydrostatic testsextraprecautions canbeimplemented topreventpressuretransients withtheOPSdeactivated andtoallowcompliance withtheotherconstraints placeduponthesteamgenerators.

Duringnormaloperation whentheOPSisrequiredtobeoperable, amaximumofonesafetyinjection pumpisallowedtobeoperabletoassurethatamassadditionpressuretransient canberelievedbyasinglePORV.Duringthesecondary sidehydrostatic testnosafetyinjection pumpswillbeallowedtooperate.TheOPSwillmitigatetheeffectsofareactorcoolantpumpstartwiththesecondary sideofthesteamgenerators atleast50'Fwarmerthanthereactorcoolantsystem.Priortothesecondary sidehydrostatic testthetemperature differential willbeminimized bothtoaidintheperformance ofthetestandtopreventapressuretransient intheeventofaninadvertent reactorcoolantpumpstart.Theexistinglimitations ontheoperation ofthechargingpumpswhentheRCSisbeingcooledbytheRHRsystemwithouttheOPSoperablewillbefollowed.

Theselimitations willpreventin-advertent overpressurization oftheRHRsystemshouldletdownbeterminated.

TheOPShasnotbeenchallenged atGinnaStation.Etwillbeoperablebeforeandafterthesecondary sidehydrostatic testasrequiredbytheRCStemperature.

Duringthehydrostatic testwhentheOPSisnotoperablethenormaloperations shiftwillbesupplemented byanadditional licensedoperator.

Thisoperatorwillbechargedwiththeresponsibility ofassuringthatalltheadministrative controlsandprecautions necessary topreventoverpressure transients willbeobserved.

Thus,thereisadequateassurance thatapressuretransient willnotoccurduringasecondary sidehydrostatic testandthatthetestcanbesafelyperformed withouttheOPSoperable.

Attachment CTheproposedAmendment totheProvisional Operating Licensehasbeenevaluated anddetermined tofallwithinthedefinition ofClassIIIof10C.F.R.Section170.22therebyrequiring afeeof$4,000.Theproposedamendment dealswithasinglesafetyissue,over-pressureprotection ofthereactorvessel.Theissuehasbeenclearlyidentified byanNRCposition.

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