ML17254A581

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Provides Proposed Schedule for Meeting Requirements of ATWS Rule & Brief Description of Tentative Design Being Considered,Per Generic Ltr 85-06.Util Will Use Design Presented in Section 4.0 of WCAP-10858
ML17254A581
Person / Time
Site: Ginna Constellation icon.png
Issue date: 10/11/1985
From: KOBER R W
ROCHESTER GAS & ELECTRIC CORP.
To: ZWOLINSKI J A
Office of Nuclear Reactor Regulation
References
GL-85-06, GL-85-6, NUDOCS 8510210050
Download: ML17254A581 (6)


Text

REGULATORNFORMATIONDISTRIBUTIONSEM(RIDS)ACCESSIONNBRe8510210050.DOC~DATE:85/10/11NOTARIZED:NODOCKETFACIL':50244RobertEmmetGinnaNuclearPlant<Unit1gRochesterG05000244AUTHBYNAMEAUTHORAFFILIATIONKOBKRiR,W,RochesterGasRElectricCorp.RECIPeNAME""RECIPIENTAFFILIATIONZWOLINSKIi0-,A~OperatingReactors"Branch5

SUBJECT:

'rovidesproposedscheduleformeetingrequirementsofATWSrule8br,iefdescriptionoftentativedesign,beingconsidered<per.GenericLtr8506,Utilwilluse:,designpresentedinSection4.0ofWCAP10858.DISTRIBUTIONCODEe'055DCOPIESRECEIVED:L~TRENCL'IZE'0TITLE:OR/LicensingSubmittal:SalemATWSEventsGL~8328NOTES:NRR/DL/SKPicy'L~09/19/6905000244RECIPIENTIDCODE/NAMEiNRRORBSBC01'NTERNAL:ACRSELD/HDS4IE/DQAVTNRR/DE/MEBNRR/DHFS/LQBNRR/DL/DRABNRR/DL/TAPMGNRR/DSI/ICSBNRR/DSI/RS8RGN1COPIESLTTRENCLe11111111RECIPIKNT'DCODE/NAME"ADM/LFMB.IE/DI'RR/DE/KQBNRR/DHFS/HFEBNRR/DLDIRNRR/DL/SSPBNRR/DSI/ASBNRI/PSBREGFIL04COPIESLTTR"ENCLEXTERNALj24XiVRC,PDRNOTES!02'PDRNSIC.03050TOTAlNUMBEROF'OPIES'EQUIRKD:LTTR$3ENCL'

~II~~fV<f>>f*~f)III)IICICffj<r-IjjIC')r)jrVI)Car,'fVWa'1'I~jjff')ljIil~a-V~aawewI~'IV/laV'l~r<1jl'fjVVjj>>lWftC,avaarrjgf'YtI1<If)II<IIVVVI.C(1CjF"Ifoal,>>'3IfK ZZIIIZZIIIII'll(zziillrfliz~ixa)(szROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,SIA'IIN.Y.14649.0001ROGERW.KOBERVICEPRCSIDSNTELECTRIC&STEAMPRODVCTIONOctoberll<1985TELCPHONCAREACOD&Tle546.2700DirectorofNuclearReactorRegulationAttention:Hr.JohnA.ZwolinskiIChiefOperatingReactorsBranchNo.5U.S.NuclearRegulatoryCommissionWashingtonrD.C.20555

Subject:

ATWSRule10CFR50.62R.E.GinnaNuclearPowerPlantDocketNo.50-244

DearHr.Zwolinski:

TheCommissionhaspublished10CFR50.62regardingthereductionofriskfromanticipatedtransientswithoutscram(ATWS)eventsatlight-watercoolednuclearpowerplants.Section50.62(d)requireseachlicenseetodevelopandsubmitaproposedscheduleformeetingtherequirementsoftherulewithin180daysaftertheissuanceoftheQAguidancefornon-safetyrelatedcomponents.NRCStaffQAguidancewasissuedApril16I1985byGenericLetter85-06.ThepurposeofthisletteristoprovideaproposedscheduleformeetingtherequirementsoftheATWSruleandtoprovideabriefdescription'fthetentativedesignbeingconsideredtomeettherequirementsoftheruleasitappliestoGinna.Section50.62(c)(l)oftherulerequireseachpressurizedwaterreactor(PWR)tohaveequipmentfromsensoroutputtofinalactuationdevicerthatisdiversefromthereactortripsystemItoautomaticallyinitiatetheauxiliaryfeedwatersystemandtoinitiateaturbinetripunderconditionsindicativeofanATWS.XnaletterfromL.D.ButterfieldtoC.O.ThomasdatedJuly25I1985(OG-156)ItheWestinghouseOwnersGroup(WOG)submittedTopicalReportWCAP-10858I"AHSACGenericDesignPackage"IwhichdescribesthreeconceptualdesignsthatmeetthisrequirementatWestinghouse-designedPWRs.RGSEisamemberoftheWOGandparticipatedinthedevelopmentoftheTopicalReport.RGGEtentativelyproposestouseadesignsimilartothatpresentedinSection4.0ofWCAP-10858(Logic2:AHSACActuationonLowHainFeedwaterFlow).Turbinetripandauxiliaryfeedwaterflowwillbeinitiatedonappropriateindicationoflowmainfeedwaterflow.ThelogicwillsenseconditionsindicativeofanATWSeventwithlossofheatsinkIbutwillnotactuateuntilafterthereactorprotectionsystemshouldhavecompleteditssafetyaction.~6po851021005085iOii'IPDRADOC5,05000244I.'nag J/Ik'l4Jlfd4 ROCHESTERGASANDELECTRICCORP.DATEOctober11I1985ToNr.JohnA.Zwolinski4SHEETNO.2Designandprocurementforthesystemwillbescheduledtoprovideforinstallationduringthe1988refuelingoutage.ThisscheduleiscontingentupontimelyStaffreviewandacceptanceofthelogicpresentedinWCAP10858anduponcompletionofothermajormodificationsrequiredbytheNRCStaffatGinnaStationinthe1986-1987timeperiod.HajorprojectsincludeSPDSinstalla-tioniAppendixRmodifications>reactorvessellevelindicationsystemidetailedControlRoomDesignReviewmodificationsIstructuralupgradeandotherissues.Vtrulyyours>~cdRogerW.Kober 04lIIk