ML17250B184

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Responds to NRC Bulletin 89-002, Stress Corrosion Cracking of High Hardness Type 410 Stainless Steel (SS) Internal Pre-Load Bolting.... Valves Disassembled & 410 SS Studs Removed & Visually & Liquid Penetrant Examined
ML17250B184
Person / Time
Site: Ginna Constellation icon.png
Issue date: 05/29/1990
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: JOHNSON A R
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
IEB-89-002, IEB-89-2, NUDOCS 9006110350
Download: ML17250B184 (3)


Text

ACCELERATEDDISTRIBUTIONDEMONS~TIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9006110350DOC.DATE:90/05/29NOTARIZED:YESFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)DOCKET05000244

SUBJECT:

RespondstoNRCBulletin89-002,"StressCorrossionCrackingofHigh-HardnessType410...."DISTRIBUTIONCODE:IE32DCOPIESRECEIVED:LTRgENCL'0SIZE:TITLE:BulletinResponse89-02reCrackingofHzgh-HardnessType410BoltingNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTIDCODE/NAMEPDl-3LAJOHNSON,AINTERNAL:AEOD/DOANRR/DET/ECMB9HNRR/DOEA/OEABllNRR/DREP/PEPB9DNRR/EMCB/HERMANNRR/PMAS/ILRB12NRR/SELLERS,D.RES/DSIR/EIBEXTERNAL:LPDRNSICCOPIESLTTRENCLRECIPIENTIDCODE/NAMEPD1-3PDAEOD/DSP/TPABNRR/DET/EMEB9H3NRR/DOEA/OGCB11NRR/DST8E2NRR/MCLELLAN,TNRR/ROODH~EXILE02NRCPDRCOPIESLTTRENCLNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPI-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR23ENCL ROCHESTERGASANDELECTRICCORPORATION~89EASTAVENUE.ROCHESTER,N.Y.14649-0001QNca@~a~~g~$>>tj-2QC~May29,1990U.S.NuclearRegulatoryCommissionDocumentControlDeskAttention:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555

Subject:

ResponsetoNRCBulletin89-02StressCorrosionCrackingofHigh-HardnessType410StainlessSteelInternalPre-loadedBoltinginAnchorDarlingModelS350WSwingCheckValvesorValvesofSimilarDesignR.E.GinnaNuclearPowerPlantDocketNumber50-244

DearMr.Johnson:

NRCBulletin89-02requireseachlicenseetodisassembleandinspectallsafetyrelatedAnchorDarlingModelS350WswingcheckvalvessuppliedwithinternalretainingblockstudsofASTMspecificationA-193GradeB6,Type410SS.Valvesofsimilardesignfromothermanufacturer'sshouldalsobeinspected.RochesterGasandElectricreviewedallsafetyrelatedcheckvalvesinstalledatR.E.GinnaNuclearPowerPlant.TencheckvalveswereidentifiedwithA-193GradeB6,Type410SSretainingblockstuds.FourareAnchorDarlingModelS350WswingcheckvalvesandsixareVelan(three.andsixinch)primarynuclearswingcheckvalves.Allthevalveshavebeendisassembledandthe410SSstudsremovedandvisuallyandliquidpenetrantexamined.Noneofthefastenersdisplayedanyindicationofcrackingandallarereceivingadditionalmetallurgicalexaminations.Disassemblyandinspectionswereperformedduringthe1989and1990annualinspectionoutages.TheinspectionswerecompletedMay4,1990.TheoriginalstudshavebeenreplacedwithASTMA-564,TP630(1100)stainlesssteel.These17-4PHstainlesssteelstudsareheattreatedto1100degreesfahrenheit,andhavebeeninstalled,withtherespectivemanufacturer'sconcurrence,underminormodifica-tionsTSR89-02andTSR90-04.~Pg(jS~5'006110350P00=,2~+DC~CK0Q)002449F'DC Page2NRCBulletin89-02~May29,1990Verytrulyyours,vMc'obertC.MeredyDivisionManagerNuclearProductionSubscribed~r,("AthisandSwornbeforemeondayof-.'ir',1990/LYNNLHAUCKSAryPtkaeinIheStateoiNewYoraMONROECOUNTYCanrnissionExpiresNov.30,t9.'r:.;.xc'.S.NuclearRegulatoryCommissionRegion1475AllendaleRoadKingofPrussia,PA19406NRCSeniorResidentInspector-GinnaStation