ML17037B588

Nine Mile Point Unit 1 - Letter Regarding a Request for Evaluation of the Effect on Unit 1 Containment of Multiple Subsequent Actuations of Safety/Relief Valves Following a Postulated Isolation Event

ML17037B588
Person / Time
Site:	Nine Mile Point
Issue date:	05/26/1978
From:	Dise D P Niagara Mohawk Power Corp
To:	Stello V Office of Nuclear Reactor Regulation
References
Download: ML17037B588 (4)

Text

REGULATORYINFORMATIONDISTRIBUTIONSYSTEM<RIDS)DISTRIBUTIONFORINCOMINGMATERIAL~~XO-.O.~.REC:STELLOVORG:DISEDPDOCDATE:05/26/78NRCNIAGARAMOHAWKPWRDATERCVD:06/05/78DOCTYPE:LETTERNOTARIZED:NOCOPIESRECEIVED

SUBJECT:

LTR1ENCL0RESPONSETONRCREQUESTOF03/20/78...ADVISINGEVALUATIONOFTHEEFFECTONSUBJECTFACILITY"SCONTAINMENTOFMULTIPLESUBSEQUENTACTUATIONSOFSAFETY/RELIEFVALVESFOILOWINGAPOSTULATEDISOLATIONEVI=NTWILLBESUBMITTEDONORBEFORE07f31/78.rPLANTNAME:NINEMILFF'T-UNITREVIEWERINITIAL:XJMDISTRIBUTORINITIAL:DISTRIBUTIONOFTHISMATERIALISASFOLLOWS++++++++>>+>++>>++MARKICONTAINMENT(RELATEDINFOONINDIVIDUALDOCKETS><DISTRIBUTIONCODEA025)FORACTION:INTERNAL:EXTERNAL:REGFII'LTRONLY<1)U~~LTRONLY(i>CASE~~+LTRONLY(i)DEPUTYDIRDPM++LTRONLY(1>STRUCTURALENGBR4t<LTRONLY<1)PLANTSYSTEMSBR++LTRONLY(2>ADFORPLANTSYSTEMS44LTRONLY<ENGINEERINGBR~+LTRONLY(i>LPDRSOSWEGONY++LTRONLY(i)TIC+4LTRONLY(1)NSIC~~LTR,.ONLY<1)ACRSCAT"B~4.LTRONLY(16>NRCPDR44LTRONLY<i)GOSSICK8.STAFF+>LTRONLY(1>DIRECTORDPM4LTRONLY(i)I8cE+%LTRONLY(2)GUIBERT+4LTRONLY(i)ADFOROPERTECH>~LTRONLY(2)CONTAINMENTSYSTEMS+4LTRONLY<1ADFORENG++LTRONLY(i>BRCHIEFORB53CHIEF44LTRONLY(Q)DISTRIBUTION:LTR44ENCL0SIZE:1PCONTROLNBR:781560734%0H+4%%%%%%4M5%4%%%%%%%%4%%0Hrfr+%%+THEEND4%44%NN%4+H.wr:

lrl NIAGARAMOHAWKPOWERCORPORATION,,i,ttlt~,NIAGARA'~MOHAWK300ERIEBOULEVARD.WESTSYRACUSE,N.Y.I3202May26,1978DirectorofNuclearReactorRegulationAttn:Mr.V.Stello,Jr.,DirectorDivisionofOperatingReactorsU.S.NuclearRegulatoryCommissionWashington,D.C.2055510IGentlemen:Re:NineMilePointUnit1DocketNo.50-220DPR-63YourletterofMarch20,1978requestedanevaluationoftheeffectontheNineMilePointUnit1containmentofmultiplesubsequentactuationsofsafety/reliefvalvesfollowingapostulatedisolationevent.Yourletteralsotransmittedcriteriaforthisevaluation.ThisevaluationispartoftheMarkIContainmentLongTerm,Program;therefoxeacommonapproachwillbetaken.Duetothegenericissuesinvolved,weareunabletosubmitaresponseinthetimeframerequested.However,anevaluationforNineMilePointUnit1willbesubmittedonorbeforeJuly31,1978.Verytrulyyours,.;~PPPD"NIAGARAMOHAWKPOWERCORPORATIONDonaldP.DiscVicePresident-EngineeringMGM/szd78156007,3 1I1)