ML17037C490

Nine Mile Point Nuclear Station, Unit 1 - Letter Submitting Copy of Report of the Advisory Committee on Reactor Safeguards Dated February 12, 1974 on Expected Performance of General Electric 8x8 Fuel Design for Reload Use

ML17037C490
Person / Time
Site:	Nine Mile Point
Issue date:	02/20/1974
From:	Skovholt D J US Atomic Energy Commission (AEC)
To:	Raymond P D Niagara Mohawk Power Corp
References
Download: ML17037C490 (14)

Text

v'EB201974DocketNo.50-220M.agaraR)hawkPowerCorporation ATlM:R.PhilipD.RaymondVicePresident

-sneering300ErieBoulevard WestSyracuse, NewYork13202Gentlel1)en:

AcopyofthereportoftheAdvisoryCommittee onReactorSafeguards datedFebruary12,1974,isenclosedforyourinformation.

ThereportreflectstheCoamhtee's reviewofthedesignandexpectedperfora)ance ofGenera1E1ectric8x8fuelbundlestobeusedinpart;ialandflQ1corereloadsforboilirgwaterreactorssuchasyourNineM.lePointNuclearStationUrd.tl.Youwillbeadvisedwhenwehaveconyleted ourreviewofyourrequestforoperation with8x8fuel.Sincerely, DonaldJ.SkovholtAssistant DirectorforOperating ReactorsDirectorate ofLicensing

Enclosure:

ACHSReportRNDiggsNDubecc:Seenext;pagel4JinksBsch~f(ig)SKariSVargaHBoydECaseDistribution DocketFileAECPDRLocalPDRRPReadingBranchReadingJRBuchanan, OHNL93Abernathy, DTIEWNoore,LDTSkovholt, L:ORTJCarter, L:ORRO(3)OGCVStelloJGalloJSaltzman FLIngramHINueller JWagner,OCWOM.lier, DRAPCollins, L:OLBDLZiemann, L:ORBg2.82........

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FormhFC-318(Rev.9.53)LCM0240CRI3C@31311423I320204 II i;,'iagarn lfohawkPowerCorporation February20,1974ccw/enclosure:

J.BruceHacDonald, EsquireDeputyCommissioner andCounsel.NewYorkStateDepartment ofCommerceandCounseltotheAtomicEnergyCouncil99Washington AvenueAlbany,NewYork12210ArvinE.Upton,EsquireLeBoeuf,Larry,Leiby6HacRae.1757NStreet',N.W.Washington, D.C.20036AnthonyZ.Roisman,EsquireBerlin,RoismanandKessler1712NStreet,N.W.Washington, D.C.20036Hr.DonaldX.Gleason,ChairmanCountyOfficeBuilding/>6EastBridgeStreetOswego,NewYork13126Hr."Robert P.Jones,Supervisor TownofScribaR.D.II4Oswego,NewYork13126OswegoCityLibrary~~

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ADVISORYCOMMITTEE ONREACTORSAFEGUARDS UNlTEDSTATESATOMlCENERGYCOMMlSSlON WASHINGTON, D.C.R054bFebruary12,1974Hanorable DixyLeeRayChaiznsnU.S.AtaoiaEmmgyGmni'ssion 545458dxJect:HEX'ORCCNGENEBALELECXREC8XSPGELXESX(ÃK)RHEZQADUSE'earDx'.BaysAtits166thmeeting,XhhemLxy7<<9,1974ttheAdvisoryCGHlAittee anReactorSafeguazds campleted agexxericreviewofthedesignandex.-pandpeeiarxtlaxxce ofGeneralElectric8xSfuelbuncllestobesplayedinpartialandfullcarereloadsinboilingwaterreaclurs.

Thesetopicswerediscussed atthe165thACRSmeetingonJanuary10-12,1974t555'te',,~,5574,andinDenver,Colorado, anJanuary24,1974.DuringitsravinestheOmmi.ttee hadthebermCit.ofdiscussians withrepresentatives oftheGenamlZXa~icGxnpxxzy, theAECRegu3atozy Staff,andofthedocu-maxtslistedbeld.TheGeneralElectricSxSfuelassalhlyconsistsof63fuelxoclsplusoneunfueled; water-fle@,spacex"~ptxxre xodinasctuareSx8bundlearraywithina-squaxmchannelbox.ThedesignofthefuelxcdsandfuelxcdbundleintheSxSreloadfuelassemblyis,exceptfardiffexencesinthelength.ofthefuelandgasplenam,thesameasinthe8x8fuelBSSHllbly used3Ilthe~6bo113LIlg waterxitorconceptreferredtointheCaanittee's n~ofSex~her21,1972.TheSxSfuelbundlesareinterchangeable inGeneralElectricboilingwaterreactorswiththepeeviously used7x7bundles.Xhgeneral,thethexualmarginstofueldamagedesignbasesaregreaterfarSxSfuelthanfar'x7fuel.%hedesignvalueafthelinearheatgemmation ratefarnormalopexmtion is33.4kw/ftfarSxSfueland17.5to18.5lee/ftfar.7x7fuelspecificpowerisslightlygreaterfarthe8xSfuelthanforthe7x7fuel.TheGenera.ElectricCatapanybelievesthe3xeerlinearheatgeneration rateandslightlygreaterratioofcladtlxxc1cness toxaddietershouMresultinfeweefailuresinSxSftxelthanin7x7fuel.AlthoughthehyQraulic resistaxxce ofSx8bunDesisslightlygreaterthanthatof7x7buxxllm,thethecal-hydraulic pex-faxmanceofboxeseitherpartially orfullyloadedwithSxSassemblies isnotchsgnlded relativetocaresloadedwith7x7assemblies.

EmeableicyLee.RayFebruary12,1974SincetheU-235enrichnents fortheindivMmQ.

fuelrods,thenumberl~tlh~lllggtlhd, Ithratioaresimilax'n theSxSand7x7designs,theneutnnicbehaviorofthetsmdesignsisnotsignificantly diffanmt.

Theintexnally locatedwaterxodintheSxSdesignreducesxod-to-xod powerpeaking.Sincethenextmania andthemal~rauLic characteristics ofSxSand7x7fuelhuxG.esaresimilar,thoraxbehaviorunderahnoxnsloperatianal t'\PlbWbl.

Ih~fl'hdcantxolxoddrop,'uel

handling, andsteamlinebreakacx68ents arenatexitedtobesignificantly different forthetwofueldesigns.II~51'WWW,'lkU'tV~h~waterreactors, andtheRegulatory Staffhaveperfamtect analysesofthebehaviorof8x8fuelinseveralmixedandfullyreloadedcca~undertxansient andaccidentcxmditions.

TheseanalysesymBictthat,,farboilingwatermectxuwwhichhavejetpumps,thepeakcladtemperatures duringapo.~~tedlarge-break IQCAusingtheXnterimAcceptance CriteriaaxelessforSxSthanfor7x7assariblies.

ERwmrer,forlargepostulated breaksinnan-)etpumpplantsandfarsmallandintexaectiate sizebreaksfarallplants,thepr~x8peakcladtemperatures areinthesamerangefarbothSxSa+i7x7fuel.Consequently, indivtitual reviewsbytheRegu-latoryStaffoftheequiperfarmmce ofSxSreloadfuel,incluKLng plantmpecific systemeffectsazxlanysignificant corefuelloadLingil1bIIfhIfwHth8xSfueltodeteexnine limitsanreactoroperating conditiorm.

TheCce-mitteewishestobeirdhraedconcerning theresultsofthesereviewsfortheinitialSxSfuelload:tngs ineachoftheseveralGeneralElectricboilingwaterreactarproductlines.TheRegulatory Staffplanstousetheresultsofrecentlycanducted N~~~8~~~I'llanalytical nedelsfarSxBfuel.TheQanaittee wishestobekeptinfcemd.IlE!fS16 andhun31eswhosedesignsbrac]setthedimensians oftheSxSfuelandantheperfarmance ofcarescantaining mixbmesofassaablies withdifferent rmobersandsizesoffuelrcds.Althoughmechanical testshavebeenperfaxned'an 8xSfuelassemblies anRcampanents todaaanstrate theirintegri.ty, additional teststovex'ifyspacergridstrengthhavebeenrequested bytheRegulatory Staff.Thismattershouldberesolvedinaninersatisfactary totheRecpQatoxy Staff.

~~lyRIMmableDixyLeeHayFehrum~12,1974TheAneealElectricCaqxmyhasplannedaprecgamofbothpre-andpost-inmHatian enauninatians tomonitortheperformance of8xSfuel!!!!~!.1lprogramandwishestobekeptinformed.

TheHegulatory Staffiscurrently revhm9xgthetreatment.

ofuncextaintiesintheestablishment andmmi;toring ofoperating limitsfarboilingwaterreactors.

TheCcxanittee wishestobekeptinfarneQ.

He-evaluation ofcareoperating limitswillbenecessary asaresultoftherecentlygcanulgated Accephmce CriteriaforEmergency CoreCoolingSystems.TheGanmittee vrishestobekeptinfarrneci.

The~tteebelievesthat,withduereganltotheabavecomments, incluQiLng theindividual reloadreviewsbytheHegulatory Staffwhichwilladdressspecificplantfeatures, theGenera.Electric8x8fuelassanblies areacceptable foruseinthereloadofGeneralElectricboilingwaterxeactxam.

&E.m.H.StrattonChaixaenStBefezences attached.

Honorable DDTLeeRayPebruary12,1974203Q45.6."Dresden3NuclearPowerStation,SecondReloadLicenseSuhnittal",

GeneralElectricCo.,NuclearPuelD@lartment, SepteInber 1973@andSuppleIRRIt AgRR%6her17~1973~Supplement B~DeceH58K' p1973Supplatent C,Decanber6,1973;Supplement D,Deliber17,1973;Supplement EcDe~Mr17'973'upplement PrJanuazp's 1974'upplement G,Januaxy9~1974)Supplement H,January'23, 1974"NineMilePointUnit1-SemndRefueling",

P.D.RayIImdtoA.Giambusso, September 14,1973'NineMi1ePointUnit1SafetyAnalysisforType5andType6ReloadPuelgNiagaraHat'uvr8c Power~aratiang October15,1973"NineMilePointUnitlrPartlcNan<<Proprietary ResponseandPart2,Proprietary Respanse,"

Jamlary15,1974Monticello NuclearGenerating PlalltgPexlIBnent PlantChangestoAccamncdate F~ilibrium CoreScramReactivity Insertian Charac-teristics",

January23,1974NED0-20103, "QerumalDesignInfoxIoatian forGeneralElectricBoilingWaterReactorReloadFuelCamellcing inSpriIlg,'74",September 1973H.E.Wi11iamsan aIldD.C.Ditmore,"Experience with.HWRFuel9hroughSeptarher 1971",NED0-10505, May1972GEAP-4059, "Vibration ofPuelRodsinP~elPlow",E.P.Quinn,July1962708Letter,J.A.HindstoV.Nmre,'ebruary 4,1974,"P~lrietary Infoxmation, SxSPuelWearTests"X~.JA,HindstoVMoorePehnlary41974SXSPue1Sur-veillance PIugramNEM-10735, "Densification Cansiderations inHNRFuelDesignandPerfoxmallce",

D.C.DitmareandRB.E13dns,Decaaber1972/Supplement 2,"Response toAECQuestions, NEW&-10735 Apri11973"(Proprietary) gSupplement 2,"Response toAK'.Questions, NEDDY-10735 Supplement 1",May1973'Proprietary),

Supplement 3,"Respanse toAECQuestions, NEDH10735@Supplement 1gJune,1973(Proprietary),

Supplement 4g"Responses toAECQuestions NEXT-10735",

tuly1973,(Proprietary) fSupplement 5'g',DensifxcatiaIl.

Consideratians 1nHNRFuel'gJuly1973(Proprietary).g SUpplements 6j7gaIKlSgFuelDensificatiaIl EffectsanGeneIzLElectricHoiUingWaterPpm~Fuel"~

a~'v~~

~~Q~Hceozab3a Dixy'eeRayFebruary12,1974,References

'contend)

NEDO20181'uppl6fMlt 1gDecember3t1973(Pxoprj~~)

g~GAPIII"AJ4xM.forthePrediction ofPelletConductance inBNRFuelRods"10."Technical ReportanDensification ofGm~ElectricReat'~Fuels",U.S~AtomicEntryCamaission, August23,1973,and"Supple>rent 1totheTechnical ReportonDensification ofCanexalElectricReactorFuels",December14,197311."Sensitivity Stayon~6FuelBuntsResponsetoaPoshQated IDGE,C.M.MaserandR.W.Grume,Deaeaher197312.NEIPr10801,"Mod~theE+/6Los~&Dcelant Accident" CoreSprylyandBottxxnFloodix@HeatTransferEffectiveness",

J..D.DuncanandJ.E.Leenaxd,'Maxch1973,and"Response toAECRet:gmstforAdditional Information anNEDE-10801",

May19739'mpa5.etary),

13,.ME0-10993, "CoreSprayandBottcmFloodingEffectiveness inthe~6"gJ.D.DurbanandJ.E.Leceard,Segteaher 197314."CoreTkmenal'Analyses ofaStainless SteelCladHeaterRodBundle",C.M.userandR.W.Griebe,December197315."StatusRepI~'ntheGeneralElectricCompanySx8FuelAssembly",

January18,1974,USAECRegu1atory Staff16."Technical ReportontheGeneralElectricOarttpany SxSFuelAssembly",

February5,1974,USMCRegulatory Staff~ff~~L~A 0