ML17263A658

Proposed Tech Specs,Increasing Allowable Reactor Coolant Activity Levels

ML17263A658
Person / Time
Site:	Ginna
Issue date:	05/23/1994
From:	ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17263A656	List: ML17263A655 ML17263A658 ML17309A545
References
NUDOCS 9405310171
Download: ML17263A658 (7)

Text

ATTACHMENTB3.1.43.1.4.1a~b.c~3.1.4.2MaximumCoolantActivitSecificationsWheneverthereactoriscriticalorthereactorcoolantaveragetemperatureisgreaterthan500F:Thetotalspecificactivityofthereactorcoolantshallnotexceed8+k'99/EpCi/gm,whereEistheaveragebetaandgammaenergiesperdisintegrationinMev.TheI-13180'88equivalentoftheiodineactivityinthe'eactorcoolantshallnotexceedEh-2~l.:'.-';:9p,i/gm.TheI-131equivalentoftheiodineactivityonthesecondarysideofasteamgeneratorshallnotexceed0.1pCi/gm.Ifthelimitof3.1.4.1.aisexceeded,thenbesubcriticalwithreactorcoolantaveragetemperaturelessthan500'Fwithin8hours.3.1.4.3a~IftheI-131equivalentactivityinthereactorcoolantexceedsthelimitof3.1.4.1.bbutislessthantheallowablelimitshownonFigure3.1.4-1,operationmaycontinueforupto168hours.3:-&-hheAmendmentNo.273.1-219405310171'00S2ZPDR.,'DOCK.05000244;iP,,,PDR' weredesignedforoperationwith14defec>.Thelimitforsecondaryiodineactivityisconservativelyestablishedwithrespecttothelimitsonprimarysystemiodineactivityandprimary-to-secondaryleakage(Specification3.1.5.2).Iftheactivityshouldexceedthespecifiedlimitsfollowingapowertransientthemajorconcernwouldbewhetheradditionalfueldefectshaddevelopedbringingthetotaltoabove14defects.Appropriateactiontobetakentobringtheactivitywithinspecificationincludeoneormoreofthefollowing:gradualdecreaseinpowertoalowerbasepower,increaseinletdownflowrate,andventingofthevolumecontroltankgasestothegasdecaytanks.Thespecifiedactivitylimitsprovideprotectiontothepublicagainstthepotentialreleaseofreactorcoolantactivitytotheatmosphere,asdemonstratedbytheanalysisofasteamgeneratortuberuptureaccident.+The500'Ftemperatureinthespecificationcorrespondsatsaturationto681psia,whichisbelowthesetpointofthesecondarysidereliefvalves.Therefore,potentialprimarytosecondaryleakageatatemperaturebelow500'Fcanbecontainedbyclosingthesteamlineisolationvalves.

References:

(1)UFSARTable9.~8,',-.::,9(2)UFSARSection11.1.8g(3)3~123 ATTACHMENTCRevisetheTechnicalSpecificationpagesasfollows:RemoveInsert3'-213'-233.1-243'-21301-233.1-24 ATTACHMENTC3.1.43.1.4.1MaximumCoolantActivitSecificationsWheneverthereactoriscriticalorthereactorcoolantaveragetemperatureisgreaterthan500'F:a.Thetotalspecificactivityofthereactorcoolantshallnotexceed100/EpCi/gm,whereEistheaveragebetaandb.c~3.1.4.2gammaenergiesperdisintegrationinMev.TheI-131doseequivalentoftheiodineactivityinthereactorcoolantshallnotexceed1.0pCi/gm.TheI-131equivalentoftheiodineactivityonthesecondarysideofasteamgeneratorshallnotexceed0.1pCi/gmoIfthelimitof3.1.4.1.aisexceeded,thenbesubcriticalwithreactorcoolantaveragetemperaturelessthan500'Fwithin8hours.3.1.4.3a~IftheI-131equivalentactivityinthereactorcoolantexceedsthelimitof3.1.4.1.bbutislessthantheallowablelimitshownonFigure3.1.4-1,operationmaycontinueforupto168hours.AmendmentNo.273.1-21 weredesignedforoperationwith1%defects'.Thelimitforsecondaryiodineactivityisconservativelyestablishedwithrespecttothelimitsonprimarysystemiodineactivityandprimary-to-secondaryleakage(Specification3.1.5.2).Iftheactivityshouldexceedthespecifiedlimitsfollowingapowertransientthemajorconcernwouldbewhetheradditionalfueldefectshaddevelopedbringingthetotaltoabove14defects.Appropriateactiontobetakentobringtheactivitywithinspecificationincludeoneormoreofthefollowing:gradualdecreaseinpowertoalowerbasepower,increaseinletdownflowrate,andventingofthevolumecontroltankgasestothegasdecaytanks.Thespecifiedactivitylimitsprovideprotectiontothepublicagainstthepotentialreleaseofreactorcoolantactivitytotheatmosphere,asdemonstratedbytheanalysisofasteamgeneratortuberuptureaccident.@The500'Ftemperatureinthespecificationcorrespondsatsaturationto681psia,whichisbelowthesetpointofthesecondarysidereliefvalves.Therefore,potentialprimarytosecondaryleakageatatemperaturebelow500Fcanbecontainedbyclosingthesteamlineisolationvalves.

References:

(1)UFSARTable9.3-9(2)UFSARSection11.1.2(3)UFSARSection15.6.33~123 EV2VVIKidO'dOAIKOOVCCOCQ25020015010050ACCEPTABLEOPERATIONUNACCEPTABLEOPERATION02030405060708090100PERCENTOFRATEDTHERMALPOWERFIGURE3.1.4-1ReactorCoolantDoseEquivalentI-131SpecificActivityLimitversusPercentofRatedThermalPowerAmendmentNo.3.1-24

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