ML17263A287

Informs That Util in Process of Procuring Replacement SGs for Plant in Ref to NRC Ltr Re 10CFR50 Mod of GDC-4 Requirements for Protection Against Dynamic Effects of Postulated Pipe Ruptures & GL 84-04

ML17263A287
Person / Time
Site:	Ginna
Issue date:	05/13/1993
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
GL-84-04, GL-84-4, NUDOCS 9305190297
Download: ML17263A287 (5)

Text

ACCELERATFDOCUMENTDISTRIUTIONSYSTEMREGULATINFORMATIONDI'STRIBUTIONSTEM(RIDS)ACCESSIONNBR:9305190297DOC.DATE:93/05/13NOTARIZED:NODOCKETFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterG05000244AUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas6ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONJOHNSON,A.R.ProjectDirectorateI-3

SUBJECT:

InformsthatutilinprocessofprocuringreplacementSGsforplant,inreftoNRC,7590-01,"10CFR50ModofGDC-4RequirementsforProtectionAgainstDynamicEffectsofPostulatedPipeRuptures"&GL84-04.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTRIENCL0SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTIDCODE/NAMEPDl-3LAJOHNSON,AINTERNAL:NRR/DE/EELBNRR/DRCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACTOGC/HDSlEXTERNAL:NRCPDRCOPIESLTTRENCLRECIPIENTIDCODE/NAMEPD1-3PDNRR/DORS/OTSBNRR/DSSA/SCSBNRR/DSSA/SRXBOC~BRE@01NSICCOPIESLTTRENCLNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTETHCONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-31(EXT.504-2065)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDITOTALNUMBEROFCOPIESREQUIRED:LTTR16ENCL 10I~

tij/////If/r/////'///~~ROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTERN.Y.14649-0001ROBERTGMECREDYVicePresidentClnnaNuclearProductionTELEPHONEAREACODE7165462700May13,1993U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555

Subject:

ApplicationofLeakBeforeBreakTechnology,GDC-4R.E.GinnaNuclearPowerPlantDocketNo.50-244Ref.(a):NuclearRegulatoryCommission,7590-01,"10CFR50ModificationofGeneralDesignCriteria4RequirementsforProtectionAgainstDynamicEffectsofPostulatedPipeRuptures,"StatementofConsiderations.(b):NRCLetter,D.C.DiIannitoR.=W.Kober(RG&E),"DocketNo.50-244,(GenericLetter84-04)",datedSeptember9,1986.

DearMr.Johnson:

RochesterGasandElectricisintheprocessofprocuringreplacementSteamGeneratorsfortheR.E.GinnaNuclearPowerPlant.TheprocessofestablishingthedesignspecificationforthesegeneratorshasledustoconcludethatitisdesirabletoclarifythedesignbasisoftheR.E.GinnaNuclearPowerPlantregardingthedynamiceffectsofprimarysystempiperuptures.InReference(a)theNRCindicatesthatifitcanbedemonstratedthattheprobabilityofpiperuptureisextremelylow,thedynamiceffectsofthepiperupture,i.e.missilegeneration,pipewhipping,pipebreakreactionforces,jetimpingementforces,decompressionwaveswithintherupturedpipeanddynamicornon-staticpressurizationincavities,subcompartmentsandcompartments,canbeexcludedfromthedesignbasisoftheunit.Thestatementofconsiderationsspecificallyexcludestheapplicabilityofthisrulemakingtoemergencycorecoolingsystems,'containments,andenvironmentalqualification.Byreferenceb,theNRCapprovedtheuseofthisrulemakingforprimarysystempipingfortheR.E.GinnaNuclearPowerPlant.Whiletherulemaking(Reference(a))explicitlydiscussespipingsupports,itdoesnotdiscussinternalsofreactorcoolantsystemcomponents.Itisourinterpretationthattherulemakingisagtsiggggptointernalcomponents,aslongasthefunctionalityof9305190297930513PDRADQCN05000244PDR

+l~"I)III4A~~~hlp~PE theEmergencyCoreCoolingSystemorContainmentarenotadverselyaffectedbythecomponent.Itisourintentionthatthedesignbasisforinternal,non-pressureboundarycomponentsofthesteamgenerator,specificallytheprimarysidedividerplate,reflectthisrulemaking.Thereforethedynamiceffectsofprimarysystempipingrupturesneednotbeincludedinthedesignbasisofthisplate.ThisisconsistentwiththeconversationsofMay7and10'993betweenMr.GeorgeWrobel(RGGE)andMr.JamesNorbergandMr.JayRajanoftheNRC.Verytrulyyours,RobertC.MecrdyBJF4284Attachmentxc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector