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)

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.