ML17261B028: Difference between revisions

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==DearMr.Johnson:==
==DearMr.Johnson:==
OnMarch15,1990,atelephoneconferencecallwasheld.withpersonnelfromWestinghouse,RochesterGasandElectricCorporationandtheNRCtodiscuss'proposedTechnicalSpecificationchangeforfuelreconstitution.Asrequested,attachedisasummaryoftheDNBandseismic/LOCAdiscussionswhichpertaintothisfuelreconstitutionTechnicalSpecification.Verytrulyyours,RobertC.MedDivisionManagerNuclearProductionRWEK095Attachmentxc:Mr.AllenR;Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector9004i00223900323PDRADOCK05000244pPDC~<P-3+a9s7aoqPOo/f(1 ATTACHMENTOnMarch15,1990,anRG&E/NestinghousetelephoneconferencecallwiththeNRCwasheldtorespondtotheNRCreviewerconcernsonarequested.GinnaTechnicalSpecificationchangeforfuelreconstitutioninvolvingreplacementofdefectivefuelrod(s)withfillerrod(s)(stainlesssteelorZircaloy-4).TheNRCrequestedasummaryofthekeyissuesdiscussedintheconferencecall.Theresponsesareasfollows:1.AconservativeapproachisutilizedtodeterminetheDNBRforallreconstitutedassemblieswhichhavefillerrodsthathavereplacedactivefueledrods.UsingapprovedNRCmethods,anevaluationisperformedassumingthatthenon-powerproducingfillerrodsoperateatpowerlevelsequaltothehighestpowerinanyofthefueledrodsinthereconstitutedassembly.ThisresultsinDNBRsthatarelower(lessmargintotheDNBRacceptancelimit)thanactuallyexists.TheminimumDNBRmuststillbegreaterthantheacceptancelimit.2.Duringfuelassemblyreconstitution,thefailedfuelrod(s)aretobereplacedwithfillerrod(s).Thefillerrod(s)haveoutsidediametersidenticaltothefuelroddiameter.Therod.lengthisalsothesame.Thegridstrengthwillremainunchangedsincethefillerrod(s)willprovidethesamesupportinthegridcellsas'thefuelrods.Forasmallnumberoffillerrod(s)(lessthan10),thechangeinmassandstiffnessofthefuelassemblywillbeinsignificant.Therewillbenegligibleeffectsonfuelassemblydynamicproperties,suchasfuelfundamentalfrequency.Thus,theloadcarryingcapabilityofthefuelassemblyandgridspacersisnotaffectedundertheseismicandLOCAdesignloadingconditionsforthereconstitutedfuel.Itisanticipatedthatthesameconclusionwouldbeapplicableformorethan10fillerrods;ifthisshouldoccurspecificevaluationswill,beperformed.
OnMarch15,1990,atelephoneconferencecallwasheld.withpersonnelfromWestinghouse,RochesterGasandElectricCorporationandtheNRCtodiscuss'proposedTechnicalSpecificationchangeforfuelreconstitution.Asrequested,attachedisasummaryoftheDNBandseismic/LOCAdiscussionswhichpertaintothisfuelreconstitutionTechnicalSpecification.Verytrulyyours,RobertC.MedDivisionManagerNuclearProductionRWEK095Attachmentxc:Mr.AllenR;Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector9004i00223900323PDRADOCK05000244pPDC~<P-3+a9s7aoqPOo/f(1 ATTACHMENTOnMarch15,1990,anRG&E/NestinghousetelephoneconferencecallwiththeNRCwasheldtorespondtotheNRCreviewerconcernsonarequested.GinnaTechnicalSpecificationchangeforfuelreconstitutioninvolvingreplacementofdefectivefuelrod(s)withfillerrod(s)(stainlesssteelorZircaloy-4).TheNRCrequestedasummaryofthekeyissuesdiscussedintheconferencecall.Theresponsesareasfollows:1.AconservativeapproachisutilizedtodeterminetheDNBRforallreconstitutedassemblieswhichhavefillerrodsthathavereplacedactivefueledrods.UsingapprovedNRCmethods,anevaluationisperformedassumingthatthenon-powerproducingfillerrodsoperateatpowerlevelsequaltothehighestpowerinanyofthefueledrodsinthereconstitutedassembly.ThisresultsinDNBRsthatarelower(lessmargintotheDNBRacceptancelimit)thanactuallyexists.TheminimumDNBRmuststillbegreaterthantheacceptancelimit.2.Duringfuelassemblyreconstitution,thefailedfuelrod(s)aretobereplacedwithfillerrod(s).Thefillerrod(s)haveoutsidediametersidenticaltothefuelroddiameter.Therod.lengthisalsothesame.Thegridstrengthwillremainunchangedsincethefillerrod(s)willprovidethesamesupportinthegridcellsas'thefuelrods.Forasmallnumberoffillerrod(s)(lessthan10),thechangeinmassandstiffnessofthefuelassemblywillbeinsignificant.Therewillbenegligibleeffectsonfuelassemblydynamicproperties,suchasfuelfundamentalfrequency.Thus,theloadcarryingcapabilityofthefuelassemblyandgridspacersisnotaffectedundertheseismicandLOCAdesignloadingconditionsforthereconstitutedfuel.Itisanticipatedthatthesameconclusionwouldbeapplicableformorethan10fillerrods;ifthisshouldoccurspecificevaluationswill,beperformed.
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Revision as of 13:53, 18 May 2018

Forwards Addl Info Re Proposed Tech Spec Amend Concerning Use of Reconstituted Fuel,Per 900315 Telcon.During Fuel Assembly Reconstitution,Failed Fuel Rods Will Be Placed W/ Filler Rods
ML17261B028
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/23/1990
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: JOHNSON A R
Office of Nuclear Reactor Regulation
References
NUDOCS 9004100223
Download: ML17261B028 (5)


Text

ACCELERATEDISTRIBUTIONDEMONSTF&TIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9004100223DOC.DATE:90/03/23NOTARIZED:NOFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas6ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONJOHNSON,'A.R.ProjectDirectorateI-3DOCKETg05000244R

SUBJECT:

ForwardsaddiinforeproposedTechSpecamendconcerninguseofreconstitutedfuel,per900315telcon.DISTRIBUTIONCODEA001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).DS,05000244RECIPIENTIDCODE/NAMEPDl-3LAJOHNSON,ACOPIESLTTRENCL1155RECIPIENTIDCODE/NAMEPD1-3PDCOPIESLTTRENCL11ADDINTERNAL:NRR/DET/ECMB9HNRR/DSTSE2NRR/DST/SICB7ENUDOCS-ABSTRACTOGC/HDS2RES/DSIR/EIB1NRR/DOEA/OTSB111NRR/DST/SELB8D1NRR/DST/SRXBSE1OCLFMB11111111011EXTERNALLPDRNSIC1111NRCPDR1,1R'NOTETOALL"RIDS"RECIPIENTS:PLEASEHELP.USTOREDUCEW~tCONTACTTHE.DOCUMENTCONTROLDESK,ROOMPI-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISIRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDlTOTALNUMBEROFCOPIESREQUIRED:LTTR21ENCL19,DDS CeC'.s~

lPiZuIIIII,PiJIIIIiIIII~I'7iy/ilmZZIIII<L<<<0<<~ROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,NY.14649-0001March23,1990TCL<:P<<ONCARKAcooE7<<<546-2700U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555

Subject:

AdditionalInformation;ProposedTechnicalSpecificationAmendmentRegardingUseofReconstitutedFuelR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Johnson:

OnMarch15,1990,atelephoneconferencecallwasheld.withpersonnelfromWestinghouse,RochesterGasandElectricCorporationandtheNRCtodiscuss'proposedTechnicalSpecificationchangeforfuelreconstitution.Asrequested,attachedisasummaryoftheDNBandseismic/LOCAdiscussionswhichpertaintothisfuelreconstitutionTechnicalSpecification.Verytrulyyours,RobertC.MedDivisionManagerNuclearProductionRWEK095Attachmentxc:Mr.AllenR;Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector9004i00223900323PDRADOCK05000244pPDC~<P-3+a9s7aoqPOo/f(1 ATTACHMENTOnMarch15,1990,anRG&E/NestinghousetelephoneconferencecallwiththeNRCwasheldtorespondtotheNRCreviewerconcernsonarequested.GinnaTechnicalSpecificationchangeforfuelreconstitutioninvolvingreplacementofdefectivefuelrod(s)withfillerrod(s)(stainlesssteelorZircaloy-4).TheNRCrequestedasummaryofthekeyissuesdiscussedintheconferencecall.Theresponsesareasfollows:1.AconservativeapproachisutilizedtodeterminetheDNBRforallreconstitutedassemblieswhichhavefillerrodsthathavereplacedactivefueledrods.UsingapprovedNRCmethods,anevaluationisperformedassumingthatthenon-powerproducingfillerrodsoperateatpowerlevelsequaltothehighestpowerinanyofthefueledrodsinthereconstitutedassembly.ThisresultsinDNBRsthatarelower(lessmargintotheDNBRacceptancelimit)thanactuallyexists.TheminimumDNBRmuststillbegreaterthantheacceptancelimit.2.Duringfuelassemblyreconstitution,thefailedfuelrod(s)aretobereplacedwithfillerrod(s).Thefillerrod(s)haveoutsidediametersidenticaltothefuelroddiameter.Therod.lengthisalsothesame.Thegridstrengthwillremainunchangedsincethefillerrod(s)willprovidethesamesupportinthegridcellsas'thefuelrods.Forasmallnumberoffillerrod(s)(lessthan10),thechangeinmassandstiffnessofthefuelassemblywillbeinsignificant.Therewillbenegligibleeffectsonfuelassemblydynamicproperties,suchasfuelfundamentalfrequency.Thus,theloadcarryingcapabilityofthefuelassemblyandgridspacersisnotaffectedundertheseismicandLOCAdesignloadingconditionsforthereconstitutedfuel.Itisanticipatedthatthesameconclusionwouldbeapplicableformorethan10fillerrods;ifthisshouldoccurspecificevaluationswill,beperformed.

rz