ML17261B013: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
 
(Created page by program invented by StriderTol)
Line 20: Line 20:
4I~%Thereconstitutedfuelassembliessatisfytheoriginaldesigncriteriaandthereloadinwhichthefuelassembliesareusedis~evaluatedtoensureexistingsafetycriteriaanddesignlimitsaremet.Therefore,thepossibilityofanewordifferentkindofaccidentisnotcreatedbytheuseofreconstitutedfuel.Therequiredcyclespecificreloadanalysiswillensureexistingsafetycriteriaand'esignlimitsaremet.Thiswillensurethereisnoreductioninamarginofsafety.Basedontheabovediscussions,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisAmendmentrequestareoutsidethecriteriaof10CPR50.91andanosignificanthazardsfindingiswarranted.Reference1.WCAP-9273A"WestinghouseReloadSafetyEvaluationMethodology",July1985B-2  
4I~%Thereconstitutedfuelassembliessatisfytheoriginaldesigncriteriaandthereloadinwhichthefuelassembliesareusedis~evaluatedtoensureexistingsafetycriteriaanddesignlimitsaremet.Therefore,thepossibilityofanewordifferentkindofaccidentisnotcreatedbytheuseofreconstitutedfuel.Therequiredcyclespecificreloadanalysiswillensureexistingsafetycriteriaand'esignlimitsaremet.Thiswillensurethereisnoreductioninamarginofsafety.Basedontheabovediscussions,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisAmendmentrequestareoutsidethecriteriaof10CPR50.91andanosignificanthazardsfindingiswarranted.Reference1.WCAP-9273A"WestinghouseReloadSafetyEvaluationMethodology",July1985B-2  
~~'TABLE1DETAILEDTECHNICALSPECIFICATIONCHANGESLocationDescritionofChaneReasonforChanePage5.3-1"...mayconsistoffuelrodscladwithZircaloy-4orfillerrodsfabricatedfromZircaloy-4orstainlesssteelifjustifiedbycycle-specificreloadanalysis.Shouldmorethan30rodsinthecore,or10rodsinanyassemblybereplacedperrefueling,areportdescribingthenumberofrodsreplacedandassociatedcycle-specificevaluationshallbesubmittedtotheCommissionpriortocriticality."Allowuseofreconstitutedfuel.Replaced"are"with"all"Deleted"Thereactorcoreismadeupof121fuelfuelassemblies.""'ordingUsedintheaboveinsertion.Added,Basis:"TheDNBRsforthereconstitutedassembliesareconservativelydeterminedbyassumingthefillerrodsareoperatingatthehighestpowerinthereconstitutedfuelassembly."RequestedbyNRCReviewer  
~~'TABLE1DETAILEDTECHNICALSPECIFICATIONCHANGESLocationDescritionofChaneReasonforChanePage5.3-1"...mayconsistoffuelrodscladwithZircaloy-4orfillerrodsfabricatedfromZircaloy-4orstainlesssteelifjustifiedbycycle-specificreloadanalysis.Shouldmorethan30rodsinthecore,or10rodsinanyassemblybereplacedperrefueling,areportdescribingthenumberofrodsreplacedandassociatedcycle-specificevaluationshallbesubmittedtotheCommissionpriortocriticality."Allowuseofreconstitutedfuel.Replaced"are"with"all"Deleted"Thereactorcoreismadeupof121fuelfuelassemblies.""'ordingUsedintheaboveinsertion.Added,Basis:"TheDNBRsforthereconstitutedassembliesareconservativelydeterminedbyassumingthefillerrodsareoperatingatthehighestpowerinthereconstitutedfuelassembly."RequestedbyNRCReviewer  
~~i>4mV1  
~~i>4mV1}}
}}

Revision as of 13:53, 18 May 2018

Proposed Tech Specs,Allowing Use of Reconstituted Fuel Assemblies
ML17261B013
Person / Time
Site: Ginna Constellation icon.png
Issue date: 03/15/1990
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17261B011 List:
References
NUDOCS 9003270048
Download: ML17261B013 (6)


Text

ATTACHMENTARevisetheTechnicalSpecificationpagesasfollows:Remove5.3-1Insert5.3-19003270K05P00204890031>popADOCKpnr-.=-P 5.35.3.1ReactorDesiFeaturesReactorCorea.Thereactorcorecontainsapproximately45metrictonsofuraniumintheformofuraniumdioxidepellets.Thepelletsareencapsul'atedinZircaloy4tubingtoformfuelrods.Thereactorcoreismadeupof121fuelassemblies"'itheachfuelassemblycontaining179fuelrodlocations.Fuelrodlocationsatanytimeduringplantlife,mayconsistoffuelrodscladwithZircaloy-4orfillerrodsfabricatedfromZircaloy-4orstainlesssteelifjustifiedbycycle-specificreloadanalysis.Shouldmorethan30,rodsinthecore,or10rodsinanyassemblybereplacedperrefueling,areportdescribingthenumberofrodsreplacedandassociatedcycle-specificevaluationshallbesubmittedtotheCommissionpriortocriticality.Eachfuelassemblyalsocontains16guidetubesandoneinstrumentationthimbleallarrangedina14x14arraytoformafuelassembly.b.Theenrichmentofreloadfuelshallbenomorethan3.5weightpercentU-235forregionsdeliveredpriortoJanuary1,1984(Regions1-15),4.25weightpercentU-235forregionsdeliveredafterJanuary1,1984,ortheirequivalentsintermsofreactivity.c.Thereare29full-lengthassembliesinthereactorcore.EachRCCassemblycontains16144inchlengthsofsilver-indium-cadmiumalloycladwithstainlesssteelwhichactasneutronabsorberswheninsertedintothecore."'asisTheDNBRsforthereconstitutedassembliesareconservativelydeterminedbyassumingthefillerrodsareoperatingatthehighestpowerinthereconstitutedfuelassembly.5.3-1Proposed RochesterGasandElectric(RG&E)desirestheflexibilitytoreconstitutefuelassembliesinordertoreducecoolantactivityandutilizetheremainingenergyinfuelassemblieswhichcontainsmallnumbersofdefectivefuelrods.Inthereconstitutionprocess,thefuelrodswhichareknowntobedefectivewillberemovedandreplacedwithdummyrods(Zircaloyorstainlesssteel).Thisreconstitutionwillbeaccomplishedbyeitherremovingthetopnozzleorbyremovingthebottomnozzleafterinvertingtheassembly,inspectingandremovingthedefectiverods,replacingthefailedrodswithdummyrodsandreattachingthenozzle.Ifafuelassemblyskeletonisdamaged,serviceablefuelrodsanddummyrodsmaybetransferredtoanewskeleton.Fuelanddummyrodinsertionandnozzleremoval/reattachmentremainthesameasinthereconstitutionprocesspreviouslydiscussed.Thereconstitutedassemblywillmeettheoriginalassemblydesigncriteria.TheR.E.GinnaNuclearPowerPlant"TechnicalSpecification5.3.1.adescribesthereactorcoreasconsistingofassembliescontaining179fuelrods.Inordertoallowfortheinsertionofreconstitutedassemblieswithdummyrods,thisstatementmustbemodifiedasproposedinAttachmentA.TheuseofreconstitutedfuelassembliesinareloadcoreisconsideredacceptablebecauseeachreloadthatcontainsreconstitutedassemblieswillbeevaluatedusingstandardmethodsasdescribedinReference1.Thereloadanalysiswillevaluatetheeffectoftheactualreconstitutiononcoreperformanceparameters,peakingfactors,coreaveragelinearheatrateeffects,andfortheeffectofthereconstitutionontheLOCA-relatedanalysestoensuretheexistingsafetycriteriaanddesignlimitsaremet.Inaddition,reconstitutedassemblieswillmeettheoriginalassemblydesigncriteria.Thereportrequirementof30and10isarbitrarilychosenasavalueabovewhichthecycle-specificevaluationwillbesubmittedtotheStaff.Inaccordancewith10CFR50.91,thesechangestotheTechnicalSpecificationshavebeenevaluatedtodetermineiftheoperationofthefacilityinaccordancewiththeproposed,Amendmentwould:1.involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or3.involveasignificantreductioninthemarginofsafety.Thereconstitutedfuelassembliesmeetthesamedesignrequirementsandsatisfythesamedesigncriteriaastheoriginalfuelassemblies.Cyclespecificreloadevaluationswillapplyexistingsafetycriteriaanddesignlimits.Thereforeuseofreconstitutedfuelassembliesdoesnotinvolveasignificantincreasein.theprobabilityorconsequencesofanaccidentpreviouslyevaluated..

4I~%Thereconstitutedfuelassembliessatisfytheoriginaldesigncriteriaandthereloadinwhichthefuelassembliesareusedis~evaluatedtoensureexistingsafetycriteriaanddesignlimitsaremet.Therefore,thepossibilityofanewordifferentkindofaccidentisnotcreatedbytheuseofreconstitutedfuel.Therequiredcyclespecificreloadanalysiswillensureexistingsafetycriteriaand'esignlimitsaremet.Thiswillensurethereisnoreductioninamarginofsafety.Basedontheabovediscussions,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisAmendmentrequestareoutsidethecriteriaof10CPR50.91andanosignificanthazardsfindingiswarranted.Reference1.WCAP-9273A"WestinghouseReloadSafetyEvaluationMethodology",July1985B-2

~~'TABLE1DETAILEDTECHNICALSPECIFICATIONCHANGESLocationDescritionofChaneReasonforChanePage5.3-1"...mayconsistoffuelrodscladwithZircaloy-4orfillerrodsfabricatedfromZircaloy-4orstainlesssteelifjustifiedbycycle-specificreloadanalysis.Shouldmorethan30rodsinthecore,or10rodsinanyassemblybereplacedperrefueling,areportdescribingthenumberofrodsreplacedandassociatedcycle-specificevaluationshallbesubmittedtotheCommissionpriortocriticality."Allowuseofreconstitutedfuel.Replaced"are"with"all"Deleted"Thereactorcoreismadeupof121fuelfuelassemblies.""'ordingUsedintheaboveinsertion.Added,Basis:"TheDNBRsforthereconstitutedassembliesareconservativelydeterminedbyassumingthefillerrodsareoperatingatthehighestpowerinthereconstitutedfuelassembly."RequestedbyNRCReviewer

~~i>4mV1