ML17056C319

Forwards Upper Shelf Energy Uncertainty Analysis for Nine Mile Point Unit 1 Beltline Welds Final Rept MPM-USE-393215, Per 921013 Meeting W/Nrc Re GL 92-01,Rev 1

ML17056C319
Person / Time
Site:	Nine Mile Point
Issue date:	03/19/1993
From:	TERRY C D NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML17056C320	List: ML17056C319 ML18038A738
References
GL-92-01, GL-92-1, NMP1L-0747, NMP1L-747, TAC-M83486, NUDOCS 9303260004
Download: ML17056C319 (6)

Text

act"n.mrux-OOCvMKm"MSramrOxSvSrKMREGULATINFORMATIONDISTRIBUTIONSTEM(RIDS)()ACCESSIONNBR:9303260004DOC.DATE:93/03/19NOTARIZED:NODOCKET'0FACIL:50-220NineMilePointNuclearStation,Unit1,NiagaraPowe05000220AUTH.NAMEAUTHORAFFILIATIONTERRYgC;D.NiagaraMohawkPowerCorp.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)DNOTES:g~~mW~

SUBJECT:

Forwards"UpperShelfEnergyUncertaintyAnalysisforNineIMilePointUnit1BeltlineWelds"FinalReptMPM-USE-393215,per921013meetingw/NRCreGL92-01,Revl.DISTRIBUTIONCODE:8028DCOPIESRECEIVED:LTRENCLISIZE:TITLE:GenericLetter92-01Responses(ReactorVesselStructuralIntegrity1RECIPIENTIDCODE/NAME,PD1-1PDINTERNAL:ACRSNRR/DE/EMCBNUDOCS-ABSTRACTOGC/HDS1RES/DSIR/EIBEXTERNAL:NRCPDRCOPIESLTTRENCL11662211101111'ECIPIENTIDCODE/NAMEBRINKMAN,D.OlNSICNRRMCDONALDiDNRR/DORS/OGCB~LREGFILECOPIESLTTRENCL221111101111DDDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!DTOTALNUMBEROFCOPIESREQUIRED:LTTR20ENCL18 0C'lIIh VMlle%,M0Si&oRIAWKNIAGARAMOHAWKPOWERCORPORATION/301PLAINFIELDROAD,SYRACUSE,N.Y.13212/TELEPHONE(315)474-1511March19,1993NMP1L0747U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Re:NineMilePointUnit1DocketNo.50-220DPR-63TACNoM84

SUBJECT:

GENERICLETTER92-01,REVISION1,REACTORVESSELSTRUCTURALINTEGRITY,UPPERSHELFENERGYESTIMATESFORBELTLINEWELDSGentlemen;YourletterofOctober13,1992,providedasummaryofameetingbetweentheStaffandNiagaraMohawkPowerCorporationtodiscussourresponsetoGenericLetter92-01forNineMilePointUnit1(NMP1).Intheletter,theStaffrecommendedthatNiagaraMohawksubmittheuncertaintyanalysisfortheevaluationofuppershelfenergy(USE)forthebeltlineweldsandincludebenchmarkingagainstdatainthePowerReactorEmbrittlementDataBase.OurletterofFebruary26,1993(NMP1L0739),indicatedthatthereportonUSEestimatesforbeltlineweldswouldbesubmittedbyMarch22,1993.Enclosedisacopyofourreportentitled,"UpperShelfEnergyUncertaintyAnalysisforNineMilePointUnit1BeltlineWelds."Basedontheanalysiscontainedherein,NiagaraMohawkhasconcludedthattheUSEestimatesprovidedinourJuly2,1992responsetoGenericLetter92-01(NMP1L0677)areaccurateandconservative,andnoneofthebeltlineweldmaterialswillexhibitUSElevelsbelow50ft-lbspriortoendoflicense.~SOO~59303260004930319PDRADQCK05000220pPDR 4ej~5"'ps~~,k>CV,,I~

Page2Asdiscussedintheenclosedreport,ABB/CombustionEngineeringhasrecentlynotifiedNiagaraMohawkthattheyhavediscoveredaninconsistencyintheNMP1beltlinematerialdocumentation.Inparticular,NiagaraMohawknowbelievesthatonlyonewireheat/fluxlotcombinationwasusedinweldseam2-564-A/C.Thecorrectrecordspertainingtoweldseam2-564-A/Clistthefollowinginformation:3/16inchRACO-3wire,HeatNo.86054-BARCOSB-5flux,LotNo.4ESFBackchip:E80183/16inchLotHADD;1/4inchLotJBGDAccordingly,theenclosedreportcontainsacorrectedsummaryoftheweldsusedintheNMP1vesselfabrication.ThisfindingdoesnotaffectpreviouscalculationsorresultssubmittedtotheStaff.Theonlyimpactistocorrectearlierdocumentationtoindicatethatwireheat/fluxlotcombination1248/4K13Fisnotusedinbeltlineweldseam2-564-A/C.Verytrulyyours,C.D.TerryVicePresidentNuclearEngineeringAER/pr003708GGEnclosureXC:RegionalAdministrator,RegionIMr,R.A.Capra,Director,ProjectDirectorateI-l,NRRMr.D.S.Brinkman,SeniorProjectManager,NRRMr.W.L.Schmidt,SeniorResidentInspectorMr.K.Cozens,NUMARCRecordsManagement

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