ML17261A957

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Proposed Tech Specs Revising Page 5.3-1 to Allow Use of Reconstituted Fuel
ML17261A957
Person / Time
Site: Ginna Constellation icon.png
Issue date: 02/16/1990
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17261A955 List:
References
NUDOCS 9002260470
Download: ML17261A957 (6)


Text

ATTACEBE2FL' RevisetheTechnical Specification pagesasfollows:Remove5.3-1Insert5.3-190022DOCK05002460470900216pDRADOCpDCP ReactorDesiFeaturesReactorCorea.Thereactorcorecontainsapproximately 45metrictonsofuraniumintheformofuraniumdioxidepellets.Thepelletsareencapsulated inZircaloy4tubingtoformfuelrods.Thereactorcoreismadeupof121fuelassemblies"'ith.

eachfuelassemblycontaining 179fuelrodlocations.

Fuelrodlocations may,atanytimeduringplantlife,haveanycombination ofthefollowing asdetermined.

inaccordance withcyclespecificreloadanalyses:

1.fuelrodsclad,withZircaloy-42.fillerrodsfabricated fromZircaloy-4orstainless steel3.vacancies.

Eachfuelassemblyalsocontains16guidetubesandoneinstrumentation thimbleallarrangedina14x14arraytoformafuelassembly.

b.Theenrichment ofreloadfuelshallbenomorethan3.5weightpercentU-235forregionsdelivered priortoJanuary1,1984(Regions1-15),4.25weightpercentU-235forregionsdelivered afterJanuary1,1984,ortheirequivalents intermsofreactivity.

c.Thereare29full-length assemblies inthereactorcore.EachRCCassemblycontains16144inchlengthsofsilver-indium-cadmium alloycladwithstainless steelwhichactasneutronabsorbers wheninsertedintothecore."'.3-1Proposed

ATTACHMENT BRochester GasandElectric(RG&E)desirestheflexibility toreconstitute fuelassemblies inordertoreducecoolantactivityandutilizetheremaining energyinfuelassemblies whichcontainsmallnumbersofdefective fuelrods.Inthereconstitution process,thefuelrodswhichareknowntobedefective willberemovedandreplacedwithdummyrods(Zircaloy orstainless steel),ornotreplacedleavingvacancies.

Thisreconstitution willbeaccomplished byeitherremovingthetopnozzleorbyremovingthebottomnozzleafterinverting theassembly, inspecting andremovingthedefective rods,replacing thefailed.rodswithdummyrodsorleavingdefective rodlocations empty,and.reattaching thenozzle.Ifafuelassemblyskeletonisdamaged.,

serviceable fuelrodsanddummyrodsmaybetransferred toanewskeleton.

Fuelanddummyrodinsertion andnozzleremoval/reattachment remainthesameasinthereconstitution processpreviously discussed.

Thereconstituted assemblywillmeettheoriginalassemblydesigncriteria.

TheR.E.GinnaNuclearPowerPlantTechnical Specification 5.3.1.adescribes thereactorcoreasconsisting ofassemblies containing 179fuelrods.Inordertoallowfortheinsertion ofreconstituted assemblies withdummyrodsand/orvacancies, thisstatement mustbemodifiedasproposedinAttachment A.Theuseofreconstituted fuelassemblies inareloadcoreisconsidered acceptable becauseeachreloadthatcontainsreconstituted assemblies willbeevaluated usingstandardmethodsasdescribed inReference 1.Thereloadanalysiswillevaluatetheeffectoftheactualreconstitution oncoreperformance parameters,-

peakingfactors,andcoreaveragelinearheatrateeffectstoensuretheexistingsafetycriteriaanddesignlimitsaremet.1naddition, reconstituted assemblies willmeettheoriginalassemblydesigncriteria.

Inaccordance with10CFR50.91, thesechangestotheTechnical Specifications havebeenevaluated todetermine iftheoperation ofthefacilityinaccordance withtheproposed.

Amendment would:1.involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.;

or2.createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated; or3.involveasignificant reduction inthemarginofsafety.Thereconstituted fuelassemblies meetthesamedesignrequirements and.satisfythesamedesigncriteriaastheoriginalfuelassemblies.

Cyclespecificreloadevaluations willapplyexistingsafetycriteriaanddesignlimits.Therefore useofreconstituted fuelassemblies doesnot.involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.

Thereconstituted fuelassemblies satisfytheoriginaldesigncriteriaandthereloadinwhichthefuelassemblies areusedisevaluated toensureexistingsafetycriteriaanddesignlimitsaremet.Therefore, thepossibility ofanewordifferent kindofaccidentisnotcreatedbytheuseofreconstituted.

fuel.Therequiredcyclespecificreloadanalysiswillensureexistingsafetycriteriaanddesignlimitsaremet.Thiswillensurethereisnoreduction inamarginofsafety.Basedontheabovediscussions, Rochester GasandElectricsubmitsthattheissuesassociated.

withthisAmendment requestareoutsidethecriteriaof10CFR50.91 andanosignificant hazards.findingiswarranted.

Reference 1.WCAP-9273A "Westinghouse ReloadSafetyEvaluation Methodology",

July1985B-2 TABLE1DETAILEDTECHNICAL SPECIFICATION CHANGESLocationPage5.3-1DescritionofChane"179fuelrods"hasbeenreplaced.

with"Thereactorcoreismadeupof121fuelassemblies'"

witheachfuelassemblycontaining 179fuelrodlocations.

Fuelrodlocations may,atanytimeduringplantlife,haveanycombination ofthefol-lowingasdetermined inaccordance withcyclespecificreloadanalyses:

ReasonforChaneAllowuseofreconstituted fuels1.fuelrodsclad.withZircaloy-42.fillerrodsfabricated fromZircaloy-4orstainless steel3.vacancies.

Eachfuelassemblyalsocontains"...

Replaced.

"are"with"all"WordingDeleted"Thereactorcoreismadeupof121fuelassemblies.

"'Usedintheaboveinsertion.