ML17229B044

St Lucie Unit 2,Cycle 11 Reactor Startup Physics Testing Rept. with 990304 Ltr

ML17229B044
Person / Time
Site:	Saint Lucie
Issue date:	03/02/1999
From:	KLEIN R M, STALL J A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-99-059, L-99-59, NUDOCS 9903110413
Download: ML17229B044 (28)

Text

CATEGORY1y.REGULATORY INFORMATION DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9903110413 DOC.DATE:

99/03/02NOTARIZED:

NOFACIL:50-389 St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAY&

.AUTHORAFFILIATION KLEIN,R.M.

FloridaPower&LightCo.STALL,J'.A.

FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DOCKETI05000389

SUBJECT:

"StLucie,Unit 2,Cycle11ReactorStartupPhysicsTestingRept."With990304ltr.DISTRIBUTION CODE:IE26DCOPIESRECEIVED:LTR 2ENCL[SIEE:ZITITLE:StartupReport/Refueling Report(perTechSpecs)NOTES:RECIPIENT ID,CODE/NAME PD2-3PDINTERNAL:

ACRSNRR/DSSA/SRXB/B EXTERNAL:

NOACCOPIESLTTRENCL11111111RECIPIENT IDCODE/NAME GLEAVES,W CSEERGN2FILE01NRCPDRCOPIESLTTRENCL111.11111NOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION, CONTACTTHEDOCUMENTCONTROIDESK(DCD)ONEXTENSION 415-2083TOTALNUMBEROFCOPIESREQUIRED:

LTTR8ENCL8 FloridaPowerStLightCompany,6351 S.OceanDrive,JensenBeach,FL34957@PIMarch4,1999L-99-05910CFR50.36U.S.NuclearRegulatory Commission ATTN:DocumentControlDeskWashington, DC20555Re:St.LucieUnit2Docket50-389PiinRPursuanttoSt.LucieUnit2Technical Specification 6.9.1.1,theenclosedsummaryreportofplantstartupandpowerescalation testingforCycle11isherebysubmitted.

Shouldyouhaveanyquestions, pleasecontactus.Verytrulyyours,J.A.StallVicePresident St.LuciePlantJAS/RLDII

Enclosure:

St.LucieUnit2,Cycle11ReactorStartupPhysicsTestingReport;March2,1999CC:RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant9903ii0413 990302PDRADOCK05000389' PDRanFPLGroupcompany

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XE'S'f"RE~Og<RX' ST.LUCIEUNIT2,CYCLE11REACTORSTARTUPPHYSICSTESTINGREPORTAuthorRayM.Reactngineering, S.LuciePlantDate.2zReviewedWalterD.MeadJr.ReactorEngineering, St.LuciePlantDateReviewedApprovedCarlG.O'Farrill ServisorofPFuEngineering C.AshtonPellReactorEngineering Supervisor, St.LuciePlantDate St.LucieUnit2,Cycle11StartupPhysicsTestingReportTableofContentsSectionTitlePaeIIIIIIIVVVIVIIVIIIIntroduction Cycle11FuelDesignCEADropTimeTestingApproachtoCriticality ZeroPowerPhysicsTestingPowerAscension ProgramSummaryReferences 45789101112ListofFiuresFiureTitlePaeCycle11CoreLoadingPatternInverseCountRatioPlot-ChannelBInverseCountRatioPlot-ChannelDPowerDistribution

-25%PowerPowerDistribution

-50%PowerPowerDistribution

-98%Power131414151617 0St.LucieUnit2,Cycle11StartupPhysicsTestingReportTableofContentscontListofTablesTableTitlePae12ApproachtoCriticality CEAGroup'Worth Summary1819 11 St.LucieUnit2,Cycle11StartupPhysicsTestingReportI.Introduction Thepurposeofthisreportistoprovideadescription ofthefueldesignandcoreload,andtosummarize thestartuptestingperformed atSt.LucieUnit2following theCycle11refueling.

TheStartuptestingverifieskeycoreandplantparameters areaspredicted.

Themajorpartsofthistestingprograminclude:1)Initialcriticality following refueling, 2)Zeropowerphysicstesting,and3)Powerascension testing.ThisCycle11StartupReportisbeingsubmitted inaccordance withTechnical Specification 6.9.1.1because:A.Fueldesignchangesweremade,introducing the"ValueAdded"pellet,theGuardianGridandconsequently eliminating longlowerend-capsThetestdatasatisfied allacceptance criteriaanddemonstrated generalconformance topredicted performance..

St.LucieUnit2,Cycle11StartupPhysicsTestingReportII.cle11FuelDesinTheCycle11reloadconsistsentirelyoffuelmanufactured byAseaBrownBoveri-Combustion Engineering (ABB-CE).

The217assemblies oftheCycle11corearecomprised offuelfromfourbatches.Ofthese,64arefreshbatchNassemblies, 64areonce-burned batchMassemblies, 84aretwice-burned batchLassemblies and5are)hrice-burned batchKassemblies.

TheRegionNassemblies consistofnon-gadolinia fuelrods(4.1to4.45w/oUQ35enriched) andGadolinia (UOz-GDg03)'bearing fuelrods(Gadolinia burnableabsorberfuelrods,4or8w/ogadolinia homogeneously dispersed ina2.2to2.55w/oUQ35enrichedcarrier).

Themechanical designoftheRegionNfuelassemblies differsfromRegionsM,LandKinthefollowing ways:1)Thebottomgridisthelaserwelded"Guardian" grid.TheGuardiangridincorporates debrisstoppingfeatures.

TheotherfuelbatchesemployTIGweldedlowergrids.2)ThefuelrodlowerendcapswerechangedfromthelonglowerendcapdesigntoashorterdesignwhichworkswiththenewGuardiangrid.Thiseffectively shiftedtheactivefuel1.14inchesdownrelativetotheotherfuelassemblyregions.3)Theupperpelletstackspacerdiscwhichseparates thetopfuelpellet&omtheupperplenumspringwasdeleted.4)ThePlenumspringdesignwasmodifiedtoaccommodate thelongerplenumsize.5)Thefuelrodpelletdiameterwasincreased by0.0005inches,pelletdishvolumedecreased by69%,andthepellettheoretical densitywas.increased

&om95.25%to95.4%.6)Thetopspacergridincorporates backuparchesinallinteriorcellsasopposedtoonlytheperipheral cellsofpreviousfuelassemblydesigns.7)Theupperendfittingflowandhold-down plateswereslightlythickened'.

Thespringforcewasincreased forthefuelassemblyupperendfittingspringsPC/M98016adressedthemechanical, thermalhydraulic andneutronic impactoftheregionNfueldesignchanges.Evaluations performed byFPLandABB-CEfoundtheoperational impactofthefueldesignchangestobeacceptable.

Therewasnosafetyimpactduetothefueldesignchanges.Subsequent LowPowerPhysics,PowerAscension andShapeAnnealing Factor(SAF)testingsubstantiated theconclusions oftheevaluations.

St.LucieUnit2,Cycle11StartupPhysicsTestingReportII.cle11FuelDesincontinued NofuelhandlingissueswerenotedduetotheRegionNfuelassemblyupperendfittingchangesmentioned above.Theimpactoftheupperendfittingchangeshadbeenevaluated byFPLpriortothefuelreceipt.Thiswasaccomplished byfieldtestinganavailable RegionNdesignupperendfittingwithaPSL2newfuelgrapple.TheentireCycle11coreconsistsofdebrisresistant fuel(longlowerend-caporGuardiangrid).TheCycle11loadingpatternissimilartoCycle10.Cycle11employsalow-leakage fuelmanagement scheme'and is90degreesrotationally symmetric.

hTheCycle11coremapisrepresented inFigure1.Theassemblyserialnumbersandcontrolelementassembly(CEA)serialnumbersaregivenforeachcorelocation.

St.LucieUnit2,Cycle11StartupPhysicsTestingRepor'tIII.CEADroTimeTestinFollowing thecorereloadandpriortotheapproachtocriticality, CEAdroptimetestingwasperformed.

Theobjective ofthistestistomeasurethetimeofinsertion fromthefullywithdrawn position(upperelectrical limit)tothe90%insertedpositionunderhot,fullflowconditions.

TheaverageCEAdroptimewasfoundtobe2.29secondswithmaximumandminimumtimesof2.92secondsand0.90seconds,respectively.

Alldroptimeswerewithinthe3.1secondmaximumrequirement ofTechnical Specification 3.1.3.4.'InadditiontheCEAdroptimedistribution requirements forscramshape(averagedroptime<2.77secondsandmaximumdroptime<3.07seconds)specified inthereloadPC/M98016(Reference 6)weresatisfied.

St.LucieVnit2,Cycle11StartupPhysicsTestingReportIV.AroachtoCriticali Theapproachtocriticality involveddilutingfromasub-critical boronconcentration of1660ppmtoapredicted criticalboronconcentration of1441ppm.InverseCountRateratio(ICRR)plotsweremaintained duringthedilutionprocessusingwiderangechannelsBandD.RefertoFigures2and3forICRRinformation.

Table1summarizes thedilutionratesandtimes,aswellasbeginning andendingboronconcentrations.

'nitialcriticality forSt.LucieUnit2,Cycle11,wasachievedonDecember12,1998at06:29withCEAgroup5at60incheswithdrawn andallotherCEAsattheall-rods-out (ARO)position.

Theactualcriticalconcentration wasobservedtobe1473ppm.

St.tucieUnit2,Cycle11StartupPhysicsTestingReportV.ZeroPowerPhsicsTestinToensurethattheoperating characteristics oftheCycle11corewereconsistent withthedesignpredictions, thefollowing testswereperformed:

1)Reactivity ComputerCheckout; 2)AllRodsOutCriticalBoronConcentration; 3)Isothermal Temperature Coefficient Measurement; and4)CEAGroupRodWorthMeasurements.

Properoperation ofthereactivity computerisensuredbyperforming the"Reactivity ComputerCheckout".

Thispartofthetestingdetermines theappropriate testingrangeandchecksthatreactivity changesarebeingcorrectly calculated bythereactivity computer's internalalgorithms.

Thetestingrangeisselectedsuchthatthesignaltonoiseratioismaximized andthattestingisperformed belowthepointofaddingnuclearheat.Thereactivity calculation is.checkedby'erforming apositiveandnegativereactorperiodtestthroughrespective introduction ofaknownamountofpositiveandnegativereactivity.

Theresultsofthereactivity computercheckoutwerecomparedtotheappropriate predictions suppliedinthereloadPC/M98016(Reference 6).Satisfactory agreement wasobtained.

Themeasurement oftheall-rods-out (ARO)criticalboronconcentration wasperformed.

Themeasuredvaluewas1524.9ppmwhichcomparedfavorably withthedesignvalueof1491ppm(Reference 2).Thiswaswithintheacceptance limitsof+100PPM.Themeasurement oftheisothermal temperature coefficient wasperformed andtheresulting moderator temperature coefficient (MTC)wasderived.TheMTCwasdetermined tobe-1.630pcm/'Fwhichfellwellwithintheacceptance criteriaof+2.0pcm/'F.ofthedesignMTCof-1.938pcm/'F(corrected).

Thissatisfies Unit2Technical Specification 3.1.1.4whichstatesthattheMTCshallbelesspositivethan5.0pcm/;Fwhenreactorpowerislessthanorequalto70%ratedthermalpower.Rodworthmeasurements wereperformed usingtherodswapmethodology.

Thismethodinvolvesexchanging areference group,whichis.measuredbytheborationdilutiontechnique, witheachoftheremaining testgroups.Acomparison ofthemeasuredanddesignCEAreactivity worthsisprovidedinTable2.Thefollowing acceptance criteriaapplytothemeasurements made:1)Themeasuredvalueofeachtestgroup,orsupergroup

measured, iswithin+15%

or+100pcmofitscorresponding designCEAworths,whichever isgreaterand,2)Themeasureworthofthereference groupandthetotalworthforalltheCEAgroupsmeasurediswithin+10%ofthetotaldesignworth.Allacceptance criteriaweremet.

0 St.IucieUnit2,~cle11StartupPhysicsTestingReportVI.PowerAscension ProramDuringpowerascension, thefixedincoredetectorsystemisutilizedtoverifythatthecoreisloadedproperlyandtherearenoabnormalities occurring invariouscoreparameters (corepeakingfactors,linearheatrate,andtilt)forpowerplateausat25%,50%,andgreaterthan98%ratedthermalpower.Asummaryofthefluxmapsatthe25%,50%and98%powerlevelsisprovidedinfigures4,58c6.Thesefluxmapsareusedforcomparing themeasuredpowerdistribution withthepredicted powerdistribution.

Forthepurposesofthepowerascension, theacceptance criteriarequirestheRMSvalueofthepowerdeviation belessthanorequalto5%.Inaddition, forthe25%and98%plateaus, theindividual assemblypowersshouldbewithin10%ofthepredicted power(both)andtherelativepowerdensity(RPD)shouldbewithin0.1RPDunitsofpredicted forthe25%powercase.Thesecriteriaweresatisfied.

AShapeAnnealing Factor(reference 5)testwasperformed inconjunction withthepowerascension (reference 3).Thistestwasnecessitated bythereplacement oftheReactorProtection SystemChannel"D"theLinearPowerRangeDetectorandthechangeintheactivefuelstackheightintroduced withtheRegionNfuel.ThemeasuredShapeAnnealing Factorswereinstalled intheLinearPowerRangeDetectorinstrument circuitsasrequiredbythereloadPC/M98016(Reference 6).Additionally, calorimetric, nuclear,anddeltaTpowercalibrations wereperformed ateachpowerplateaupriortoadvancing reactorpowertothenexthigherlevelspecified byprocedure.

10 0St.LucieUnit2,Cycle11StartupPhysicsTestingReportVII.SummaruCompliance withtheapplicable Unit2Technical Specifications wassatisfactory andallacceptance criteriaweremet.11 St.LucieUnit2,Cycle11StartupPhysicsTestingReportVIII.References 1)"InitialCriticality, "Pre-Operational Procedure 2-3200088 2)"ReloadStartupPhysicsTesting,"Pre-Operational Procedure 32000913)"ReactorEngineering PowerAscension Program,"

Pre-Operational Procedure 32000924)St.LucieUnit2Technical Specifications.

5)"ShapeAnnealing FactorTest,"Pre-Operational TestProcedure 32000936)St.LucieUrit2Cycle11ReloadPC/M89801612 St.LucieUnit2,Cycle11StartupPhysicsTestingReportFIGURE1CYCLE11CORELOADINGPATTERNYXIiM11IM27N28L74101M49L95N23L4263M22IIIIIL66M04L65N2743M52N5217L07M38205L02N39122L86N20M4555N29L59N02201111L91N09L5073NOSL78N4911219L20M33'M69105N45L25N623275L12MOTK7967N43L30N556318L35M60M56110WV~TSIIIIIIPMKHIIIIIIIIIIIIIL41L97L76L47-21IIIIIIIIIII-'r'-'-i-'-'-18 IIhIM24M48N18M26M10L8410N1528L62L04N3523M35L06N40M54N262003415L11N48L22N04L93478N42114N30L88202II'-17II-~-~-16IIM62118L61N14L688M06L27M32L80N1029119107N54113M58K78N56M68N34L52515N06M44M01115L55M39203N57L73M41M55M5933204104L34N36M2110015-'-'-14-'13-'-'-12-'1-'-'-10-'-'-'-8'L43L71M8121M63M83L57N63L316N1625N46L011L94N5330M66L13M37M50206K73M65N64K80M08704460L75N44L08N247213M64M82L70N60L24109116L72M42207N61L54M40M70M3452208108L21N41hl28121FE0C'BAM02N07L53N337116M67N5814K77N59M57N47L79649N01M51M1212-'"'-'-6L69N21120L60N11L8120M31102M05L28M61L5131103N1241L90N22L837-'-'-'-5L89N31209L92N0876L23N3827L10N37L33N03L5822117N32L644210L63N17M533L85M09N5174M25L05N1369M36L03N50M46N1921179M47N25M23M03L6726L873L46L77L96L40AssemblySerial¹XXXInsertSerial¹¹¹13

St.LucieUnit2,CycleilStartupPhysicsTestingReportFIGLRE2.WIDERANGECHANNELBBORONDILUTION0.9.0.80.70.60.50.40.30.20.1010002000300040005000,600070008000OAu.OII$DILUTCDFIGURE3.WIDERANGECHAN%LDBORONDILUTION0.90.80.70.6K0.550.40.30.20.1.010002000300040005000800070008000OALLONSOILUTKD14 0

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1stt)tt1)OOU;et)SAAA1I'"Le powerDIN)ttn4)oh colllpNtlonyhalDeNtptn4aIn4IItllUSM)4OSN0410~SN4STCMTS4AN4AN4DNNM)I4ANI5tI4DIIAlsACI4AU1$1IJNIJDD4)NOlt1ISNUcl44UIACDUNI44)IUAct4lltIISN44mNtIANICU4411NLUOIJTC4404cISNLIU44nINISNIJN4mlSCDAll4ANILiteLISI4DUUtIDNlect~ANILiteIJDI4411INISNISN4ACCcUCISNIJU4AN4101~Jcs~JS)44U)StIS'ISN44NUSIANIDU44U~A50~N)44UIN1450IANS441SINISN1Ale4JN)05MSO~sttOJNIUU)0IJII44NI44)IUlLIN1)0044NUlACI44UInIJN)ill44N111ISN44m151JisTi4AINlnIJN)Sic~A4C)TCION)ANMllUSUNLli)~ADIln)DNims~AelInISNLilt4ADCitssnsn4DUNtIJN4JUlclLUDLlcl44UlitIS)0U)A44NIUIS)I)SIC4ANClll1$14L)ll4)NINDISNL)$5~AULNJN~JlIUtISNISU~41$USillsu1I4DO)UIISleISU4DN151)Am)ACI4mll)lAel~DtlINUOD)DUODOTIctLINLIN~mcicsLUOUSC~ANNSUNLIU~AUNlIDIOIOAUN)UNLNI~AltN)INNMUillLUDUNaln)COUCOLUTMCIUtIUDLIN~ANCUTISN~JNUCJC1M45ltIJ01~40$UtUNIJU0DUUlIANOJU~AllUIUN)IDUMl1UCLeisutlMUUSUNIlnl~415I4DDSUlUle)lt)~41$Ul)ANISU~lnUlIJaiUN~ANINISNLU)~JltlitUNLIN44MUT)NIMUUlLNDIDTSamlUILU4unSJU04)IUlISNINI~AltINlsn1451~DUJlAltOOUSNIDN1451~lotNCJleltl~AIINSLlmun~JUletUDOIsn't~AU10$LlnL15)F4111stIODtt)lieISN44N5IJNIJ)C~ANIDNID)IMl)IONAll~AltIJNIDCS4SITNce1451MstIIONIDC)~ANTlmeIJN~4UISNLUC~litUNIN)~405JSDNINNSIIJIOIJNUNID)IONOMstitLINLINMDCLln11$1MUTTISNISUMU~DNICSNJtl~AntnLUISINMIC1450ISN~ANCJ14Jn~AmI~ACI1ACIODNLNDuc1DANIISNUU44CIL)14u1)4ANIUlsUSC~AetILXOlit)OD0$lieAtt~AllIJDDISN~AOS1IDIOu1I4ANIIJNLIN4lalIsleIst4ANILINLUC44NI)litLIlc440IIANIDU~DUulaunMNIANIAN~ACILlleUN4mtACOJTI4lnILNO4JUllnLIN44llIS)0IJle44Num'JIC4)INIJltIDU4AUIIACI141$Msl)JltISN44NltlmsLml44011seeIJU4AIUIUU4ml5ATOI44UASDAC)4411UIllsLUS4DUIDNUNS.4415IISNIJN4llcLINl)N44DCltLiteLIU4)mUIJN)ST)4ANSltISNIJN44)0ICI)CDIACI44)I1$UNLml4mlN44UUJDI4514JUNLUDIJll4411ScsJU4)NItIJNJcsIJNJct44N,44014$0ACD4JNRMSDevlatlon:

1.25'A$10JNITJ'n4401MNIslell4NC4DNtnamcor0oetecaonsystemNonerameoerDooencsxt,natoaevuaonsnoamosNs0manorchamIoas@,anameetmereqeremems aDAI4snntormea amesaenaospercecapowertntpcmewemememepoweraceansmntestpmefmh,17 0..ISt.IucieUnit2,Cycle11StartupPhysicsTestingReportTable1Approach.to Criticality DilutionRate132gpm88gpm44gpmInitialBoronConcentration 166015911491FinalBoronConcentration 159114911473DilutionTime(minutes)

~21707518 00St.LucieUnit2,Cycle11StartupPhysicsTestingReportTable2CEAGroupWorthSummaryCEAGroupReference GroupB1&23,4&5TotalMeasuredWorth(pcm)2140.69~1427.651724.4817627054.84Design*Worth(pcm)2070.001417169117126890PercentDifference

-3.30.-0.75-1.94-2.84-2.34*Reference 2Percentdifference

=(Design-Measured)/(Measured)

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