ML17261B061

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Advises of Changes to 890201 Commitments Made Under Programmed Enhancement Response to Generic Ltr 88-17.Changes Will Not Reduce Capability to Operate Safely in Reduced Inventory Condition or Scope of Programmed Enhancements
ML17261B061
Person / Time
Site: Ginna Constellation icon.png
Issue date: 04/26/1990
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: JOHNSON A R
Office of Nuclear Reactor Regulation
References
GL-88-17, NUDOCS 9005040045
Download: ML17261B061 (5)


Text

ACCELERATEDDISTRIBUTIONDEMONSTRATIONSYSTEMREGULATORYXNFORMATXONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9005040045DOC.DATE:90/04/26NOTARIZED:NOFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATXONMECREDY,R.C.RochesterGas6ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONJOHNSON,A.R.ProjectDirectorateI-3DOCKET05000244R

SUBJECT:

Advisesofchangesto890201commitmentsmadeunderprogrammedenhancement,responsetoGL88-17.DISTRIBUTIONCODE:AO61DCOPIESRECEIVED:LTRgENCL0SIZE:TITLE:OR/LicensingSubmittal:LossofResidualHeatRemoval(RHR)GL-87-129'SRECIPXENTIDCODE/NAMEPD1-3LAJOHNSON,ACOPIESLTTRENCLRECIPIENTIDCODE/NAMEPD1-3PDCOPIESLTTRENCLNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).0500024'4jAINTERNALNRRBALUKJIANIHNRR/DOEA/OTSB11NUDOCS-ABSTRACTOGC/HDS2RES/DSIR/EIBEXTERNAL:LPDRNSICNRRTRAMMELL,CNRR/DST8E2OC/LFMBNRCPDRSgdV512.@g.SDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWAS'ONTACTTHE.DOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISIRIBUTIONLISISFORDOCUMENTSYOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:LTTR17ENCL 4hfJ'(~~r~~A1~ogli/p~*J'I1isIgsJ~II>fI",~~<~~J

<<iIili~ZZZitIlll0\los8.illijriiSir7ROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,N.K14649-0001A'pril26,1990TCLCPHONCAREACOOE7le546-2700U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555

Subject:

LossofDecayHeatRemovalWhileOperatingintheReducedInventoryCondition(GL88-17)R.E.GinnaNuclearPowerPlantDocketNo.50-244

Reference:

(a)LetterfromR.C.Mecredy(RG&E)toCarlStahle(NRC),LossofDecayHeatRemoval(GL88-17),datedJanuary4,1989(b)LetterfromR.C.Mecredy(RG&E)toCarlStahle(NRC),samesubject,datedFebruary1,1989

DearMr.Johnson:

RG&ErespondedtoGenericLetter88-17inReferences(a)and(b).TwocommitmentsmadeunderourProgrammedEnhancementresponseinReference(b)havebeenchangedasnotedherein.Neitherofthesechangesresultsinareductioninthecapabilitytooperatesafelywhileinthereduced.inventoryconditionnortheoverallscopeofourprogrammedenhancements.Item1InourProgrammedEnhancementresponse,Reference(b),Attachment1,page2;RG&Estatedthatthereferencelegforthe(original)Loop"B"leveltransmitterwouldberelocatedtothepressurizer.ThebasisforthisactionwasanattempttoreducelooplevelerrorshouldadifferencebetweencontainmentpressureandRCSpressureoccur.Itwasdeterminedduringthemodificationprocessthatsuchaconditionwouldnotoccurduringreducedinventoryoperation,becausetheRCSisprovided.withasufficientlylargeventpaththrougheitherthepressurizerorotheranalyzedventpathswhichwillpreventpressurization.Thisisimplementedthroughtheoperatingprocedureduringreducedinventory.Eductoroperationsarenolongerconductedwhileinthereducedinventoryconditiontherebyeliminatingthisasaconcernrelativetoinducingapressuredifferential.Therefore,sinceanimprovementinlooplevelaccuracywouldnotbeexpectedfromsuchamodification,thisrelocationwasdeletedfromtheoverallworkscopeofprovidingenhancedlooplevelindication.9005040045900426PDRADOCK05000244PPDC Item2InourProgrammedEnhancementresponse,Reference(b),Attachment1,page4,RG&EstatedthatinordertoenhancethemonitoringofthestateoftheRHRSandRCSduringreducedinventoryconditions,severalplantmodificationsarebeingdevelopedforimplementationduringthe1990refuelingoutage:1)RHRpumpsuctionpressuremonitoring,2)RHRmotorcurrentmonitoring,and3)RHRNPSHmonitoring.OneoftheinputstotheNPSHinstrumentationisRHRsuctionfluidtemperature.'pproximatelyamonthdelayinthereceiptofthenewtemperaturedetectorshasoccurredwiththeresultthattheNPSHmonitoringinstrumentationwillnotbeavailableforuseuntilafterouranticipatedreturntofullpowerinearlyMay1990.Basedona4/30/90receiptofthenewdetectors,installationandturnoverisexpected'ytheendofMay1990whichislongbeforethenextscheduled.reducedinventorycondition.Shouldasignificantchangeinthisscheduleoccur,wewillnotifyyou.'erytrulyyours,RobertC.McredyDivisionManagerNuclearProductionGAHK100xc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C."20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector kA