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.mru x-OOCvMKm"MSramrOxSvSrKMREGULATINFORMATION DISTRIBUTION STEM(RIDS)()ACCESSION NBR:9303260004 DOC.DATE:

93/03/19NOTARIZED:

NODOCKET'0FACIL:50-220 NineMilePointNuclearStation,Unit1,NiagaraPowe05000220AUTH.NAMEAUTHORAFFILIATION TERRYgC;D.

NiagaraMohawkPowerCorp.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)DNOTES:g~~mW~

SUBJECT:

Forwards"UpperShelfEnergyUncertainty AnalysisforNineIMilePointUnit1BeltlineWelds"FinalReptMPM-USE-393215, per921013meetingw/NRCreGL92-01,Rev l.DISTRIBUTION CODE:8028DCOPIESRECEIVED:LTR ENCLISIZE:TITLE:GenericLetter92-01Responses (ReactorVesselStructural Integrity 1RECIPIENT IDCODE/NAME, PD1-1PDINTERNAL:

ACRSNRR/DE/EMCB NUDOCS-ABSTRACT OGC/HDS1RES/DSIR/EIB EXTERNAL:

NRCPDRCOPIESLTTRENCL11662211101111'ECIPIENT IDCODE/NAME BRINKMAN,D.

OlNSICNRRMCDONALDiD NRR/DORS/OGCB

~LREGFILECOPIESLTTRENCL221111101111DDDNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)

TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!DTOTALNUMBEROFCOPIESREQUIRED:

LTTR20ENCL18 0C'lIIh VMlle%,M0Si&oRIAWK NIAGARAMOHAWKPOWERCORPORATION/301 PLAINFIELD ROAD,SYRACUSE, N.Y.13212/TELEPHONE (315)474-1511March19,1993NMP1L0747U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Re:NineMilePointUnit1DocketNo.50-220DPR-63TACNoM84

SUBJECT:

GENERICLETTER92-01,REVISION1,REACTORVESSELSTRUCTURAL INTEGRITY, UPPERSHELFENERGYESTIMATES FORBELTLINEWELDSGentlemen; YourletterofOctober13,1992,providedasummaryofameetingbetweentheStaffandNiagaraMohawkPowerCorporation todiscussourresponsetoGenericLetter92-01forNineMilePointUnit1(NMP1).Intheletter,theStaffrecommended thatNiagaraMohawksubmittheuncertainty analysisfortheevaluation ofuppershelfenergy(USE)forthebeltlineweldsandincludebenchmarking againstdatainthePowerReactorEmbrittlement DataBase.OurletterofFebruary26,1993(NMP1L0739),indicated thatthereportonUSEestimates forbeltlineweldswouldbesubmitted byMarch22,1993.Enclosedisacopyofourreportentitled, "UpperShelfEnergyUncertainty AnalysisforNineMilePointUnit1BeltlineWelds."Basedontheanalysiscontained herein,NiagaraMohawkhasconcluded thattheUSEestimates providedinourJuly2,1992responsetoGenericLetter92-01(NMP1L0677)areaccurateandconservative, andnoneofthebeltlineweldmaterials willexhibitUSElevelsbelow50ft-lbspriortoendoflicense.~SOO~59303260004 930319PDRADQCK05000220pPDR 4ej~5"'ps~~,k>CV,,I~

Page2Asdiscussed intheenclosedreport,ABB/Combustion Engineering hasrecentlynotifiedNiagaraMohawkthattheyhavediscovered aninconsistency intheNMP1beltlinematerialdocumentation.

Inparticular, NiagaraMohawknowbelievesthatonlyonewireheat/flux lotcombination wasusedinweldseam2-564-A/C.

Thecorrectrecordspertaining toweldseam2-564-A/C listthefollowing information:

3/16inchRACO-3wire,HeatNo.86054-BARCOSB-5flux,LotNo.4ESFBackchip:

E80183/16inchLotHADD;1/4inchLotJBGDAccordingly, theenclosedreportcontainsacorrected summaryoftheweldsusedintheNMP1vesselfabrication.

Thisfindingdoesnotaffectpreviouscalculations orresultssubmitted totheStaff.Theonlyimpactistocorrectearlierdocumentation toindicatethatwireheat/flux lotcombination 1248/4K13F isnotusedinbeltlineweldseam2-564-A/C.

Verytrulyyours,C.D.TerryVicePresident NuclearEngineering AER/pr003708GGEnclosure XC:RegionalAdministrator, RegionIMr,R.A.Capra,Director, ProjectDirectorate I-l,NRRMr.D.S.Brinkman, SeniorProjectManager,NRRMr.W.L.Schmidt,SeniorResidentInspector Mr.K.Cozens,NUMARCRecordsManagement

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