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

ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEMREGULATORY XNFORMATXON DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9005040045 DOC.DATE:

90/04/26NOTARIZED:

NOFACIL:50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester GAUTH.NAMEAUTHORAFFILIATXON MECREDY,R.C.

Rochester Gas6ElectricCorp.RECIP.NAME RECIPIENT AFFILIATION JOHNSON,A.R.

ProjectDirectorate I-3DOCKET05000244R

SUBJECT:

Advisesofchangesto890201commitments madeunderprogrammed enhancement, responsetoGL88-17.DISTRIBUTION CODE:AO61DCOPIESRECEIVED:LTR gENCL0SIZE:TITLE:OR/Licensing Submittal:

LossofResidualHeatRemoval(RHR)GL-87-129'SRECIPXENT IDCODE/NAME PD1-3LAJOHNSON,A COPIESLTTRENCLRECIPIENT IDCODE/NAME PD1-3PDCOPIESLTTRENCLNOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).

0500024'4 jAINTERNALNRRBALUKJIANIHNRR/DOEA/OTS B11NUDOCS-ABSTRACT OGC/HDS2RES/DSIR/EIB EXTERNAL:

LPDRNSICNRRTRAMMELL, CNRR/DST8E2OC/LFMBNRCPDRSgdV512.@g.SDNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWAS'ONTACT THE.DOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISIRIBUTION LISISFORDOCUMENTS YOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:

LTTR17ENCL 4hfJ'(~~r~~A1~ogli/p~*J'I1isIgsJ~II>fI",~~<~~J

<<iIili~ZZZitIlll0\los8.illijriiSir7 ROCHESTER GASANDELECTRICCORPORATION o89EASTAVENUE,ROCHESTER, N.K14649-0001 A'pril26,1990TCLCPHONC AREACOOE7le546-2700U.S.NuclearRegulatory Commission DocumentControlDeskAttn:AllenR.JohnsonProjectDirectorate I-3Washington, D.C.20555

Subject:

LossofDecayHeatRemovalWhileOperating intheReducedInventory Condition (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&Eresponded toGenericLetter88-17inReferences (a)and(b).Twocommitments madeunderourProgrammed Enhancement responseinReference (b)havebeenchangedasnotedherein.Neitherofthesechangesresultsinareduction inthecapability tooperatesafelywhileinthereduced.inventory condition northeoverallscopeofourprogrammed enhancements.

Item1InourProgrammed Enhancement

response, Reference (b),Attachment 1,page2;RG&Estatedthatthereference legforthe(original)

Loop"B"leveltransmitter wouldberelocated tothepressurizer.

Thebasisforthisactionwasanattempttoreducelooplevelerrorshouldadifference betweencontainment pressureandRCSpressureoccur.Itwasdetermined duringthemodification processthatsuchacondition wouldnotoccurduringreducedinventory operation, becausetheRCSisprovided.

withasufficiently largeventpaththrougheitherthepressurizer orotheranalyzedventpathswhichwillpreventpressurization.

Thisisimplemented throughtheoperating procedure duringreducedinventory.

Eductoroperations arenolongerconducted whileinthereducedinventory condition therebyeliminating thisasaconcernrelativetoinducingapressuredifferential.

Therefore, sinceanimprovement inlooplevelaccuracywouldnotbeexpectedfromsuchamodification, thisrelocation wasdeletedfromtheoverallworkscopeofproviding enhancedlooplevelindication.

9005040045 900426PDRADOCK05000244PPDC Item2InourProgrammed Enhancement

response, Reference (b),Attachment 1,page4,RG&Estatedthatinordertoenhancethemonitoring ofthestateoftheRHRSandRCSduringreducedinventory conditions, severalplantmodifications arebeingdeveloped forimplementation duringthe1990refueling outage:1)RHRpumpsuctionpressuremonitoring, 2)RHRmotorcurrentmonitoring, and3)RHRNPSHmonitoring.

OneoftheinputstotheNPSHinstrumentation isRHRsuctionfluidtemperature.

'pproximately amonthdelayinthereceiptofthenewtemperature detectors hasoccurredwiththeresultthattheNPSHmonitoring instrumentation willnotbeavailable foruseuntilafterouranticipated returntofullpowerinearlyMay1990.Basedona4/30/90receiptofthenewdetectors, installation andturnoverisexpected'y theendofMay1990whichislongbeforethenextscheduled.

reducedinventory condition.

Shouldasignificant changeinthisscheduleoccur,wewillnotifyyou.'erytrulyyours,RobertC.McredyDivisionManagerNuclearProduction GAHK100xc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorate I-3Washington, D.C."20555U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingofPrussia,PA19406GinnaSeniorResidentInspector kA