ML17320B024
| ML17320B024 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/06/1984 |
| From: | ALEXICH M P INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| To: | KEPPLER J G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| AEP:NRC:0745K, AEP:NRC:745K, NUDOCS 8405040264 | |
| Download: ML17320B024 (107) | |
Text
INDIANA8MICHIGANELECTRICCOMPANYP.O.BOX16631COLUMBUS,OHIO43216KJ'ILEcgpyiFebruary6,1984AEP:NRC:0745KDonaldC.CookNuclearPlantUnitNo.DocketNo.50-315LicenseNo.DPR-58STARTUPREPORTFORUNIT1CYCLE8PRIIPALSTAFF,RPD/RAMr.JamesG.Keppler,RegionalAdministratorU.S.NuclearRegulatoryCommissionOfficeofInspectionandEnforcementRegionIII799RooseveltRoadGlenEllyn,Illinois60137
DearMr.Keppler:
/RA~AOSGAORMSDRMASCSFileThisletteranditsAttachmenttransmitasummaryreportoftheUnit1Cycle8startupandpowerescalationtesting.Th1ssubmittalisbeingmade1ncompliancewithTechn1calSpecificationNo.6.9.F1,Items2and3.ThisdocumenthasbeenpreparedfollowingCorporateProcedureswhichincorporateareasonablesetofcontrolstoensureitsaccuracyandcompletenesspriortos1gnaturebytheundersigned.Verytrulyyours,eked'$1I<'iMPA/bgsM.P.AlexichVicePresidentcc:JohnE.DolanM'.G.Smith,Jr.-BridgmanR.C.CallenG.CharnoffE.R.Swanson,NRCResidentInspector-Bridgmani8~OSO~O2~~S~O~O~PDRADOCK050003i5P'PDRFEB81984 0~
Mr.JamesG.KepplerAEP:NRC:0745Kbc:J.G.Feinstein/J.M.Cleveland/W.L.ZimmermannH.N.Scherer,Jr./S.H.Horowitz/R.C.CarruthR.F.Hering/S.H.Steinhart/J.A.KobyraR.F.KroegerT.P.Beilman-BridgmanJ.A.DiBellaR.W.JurgensenB.H.Bennett/F.S.VanPelt,Jr.J.F.Stietzel-BridgmanJ.B.ShinnockD.Wigginton-NRCAEP:NRC:0856AAEP:NRC:0584ADC-N-6500 4JJf'C~~~~~>'II44I'-~~~5'~~~~~'4~4Kfg~49E4I~~~4III4 TABLEOFCONTENTSSECTIONTITLEIXXINTRODUCTIONCORELOADINGANDFUELINSPECTIONINITXALCRITICALITYIVaZEROPOWERPHYSICSTESTING,LOWLEAKAGELOADINGPATTERN(LP)INVERSECOUNTRATERATXO(ICRR)PLOTSHAPESFORUNXT1CYCLE8PROBLEMSASSOCXATEDWITHFLUXMAPPINGSYSTEMVaPOWERASCENSIONTESTINGPLANTCHEMISTRYHISTORYPLANTRADIATIONSURVEYSREACTORCOOLANTFLOWMEASUREMENTPLANTTHERMALPOWERCALIBRATION
IIntroductionTheUnit1Cycle7-8outagebegan'ithreactorshutdownonJuly16,1983,afteratwenty-eight(28)daypowercoastdownre-sultinginatotalcycle7burnupof10,446.8MWD/MTUandfinalboronconcentrationatessentiallyzeroppm.One-hundredper-cent(100%)RTPwasagainreachedonNovember7,1983.StartuptestingwascompletedonNovember8,1983,withafullpowerfluxmap.Thefuelshufflesequenceforthisoutagewasthetypicalshuffle.ThefuelshufflebeganonAugust18,1983,andwascompletedonAugust23,1983.Otherthantypicalmechanicalproblemsandonefuelshufflesequenceerror,theshufflewasuneventfulwithnodamagedfuelassembliesdetected.Atotalofeighty(80)WestinghouseOptimizedFuelAssembles(OFA)wereplacedinthecorewithsixty-eight(68)ofthesefuelassembliescontainingWetAnnularBurnableAbsorbers(WABA).ForthefirsttimeinUnit1,thefreshassemblieswereloadedintothecoreinalowneutronleakagepattern.Alsoforthefirsttime,asaaresultoftheWABAplacement,theirradiatedsecondarysourceswereplacedinfuelassembliesontheperipheryofthecorenearthesourcerangedetectors.Theplacementofthesecondarysourcesre-sultedinextensiveanalysisoftheireffectontheInverseCount,RateRatio(ICRR)duringtheapproachtocriticality.Theapproachtocriticalitystartedwithshutdownbankswith-drawalat0133hoursonOctober19,1983.Dilutiontowardcriticalitywashaltedat,approximately1700ppmpendingPlantManager'sapprovalpriortoenteringMode,2.AsaresultofaproblemwiththeRodPositionIndicators(RPI's),dilutiontocriticalityfrom1700ppmwasdelayedapproximatelythirty(30)hours.Dilutionresumedat1812hoursOctober20,1983,andcriticalitywasachievedat2103hours,October20,1983.Afterstabilizingthereactor,datawasobtainedtodeterminetheZeroPowerPhysicstestingrangeandthepointofnuclearheat,.ZeroPowerphysicstestingbeganat0600hoursonOctober21,1983,andincludedtheusualallrodsout(ARO)IsothermalTemperatureCoefficent,(ITC),controlrodworth,boronworthandboronendpointtestsalongwithAROfluxmap.ThemeasuredAROITCwasessentiallythesameasthedesignvalue,therefore,norodwithdrawallimitswererequiredtoensureanegativeMTCabove70%RTP.Allrodworthandboronendpointmeasurementscomparedfavorablywithdesignvalues.Powerascension'estingfollowed,startingonOctober24,1983,witha30%RTPfluxmap,followedbya48%RTPincore/excorecrosscalibration,ModeratorTemperatureCoefficient,DopplerPowerCo-efficient,hT/hPratiomeasurementsandseveralfluxmaps.Powerascensionwentsmoothlywiththeonlyuplannedholdbeingat95%RTP,asthethree-dimensionalanalyticalfactorswereunavailable forfluxmapprocessing.OnNovember4,1983,thethree-dimensionalanalyticalfactorswereusedinprocessingthe95%RTPfluxmapwhichresultedinanallowablepowerlevel(APL)greaterthan100%RTP.Thereactorpowerlevelwassubsequentlyincreasedto100%RTP.hIngeneral,allstartuptestswererelativelyroutine.Theywereconductedinatimelyandexpedientmannerandresultedinaccuratestartupinformationanddatathatcomparedfavorablywithdesignexpectationsandmetacceptancecriteria.Asstatedinsection6.9.1.2ofUnit1technicalSpecifica-tions,thetestsidentifiedintheFSARshallbeaddressedintheStartupReport.ThetestsintheFSARaretestswhichwereperformedatthebeginningofUnit1Cycle1.Notallthesetests,needtobeperformedonareloadcycle.TheFSARteststhatwererequiredtobeperformedonthisreloadcoreareaddressedinde-tailinthisreport.ThoseFSARtestsnotrequiredtobeperformedonthisreloadcoreareaddressedintheUnit1Cycle1StartupReport.
XICORELOADINGANDFUELINSPECTIONTheUnit1Cycle8fuelassemblyshufflesequencecommencedat1250hoursonAugust18,1983,andwascompletedat2245hoursonAugust23,1983.Eighty(80)depletedfuelassemblies(sixty-five[65]regionGandfifteen[15]regionH,allExxon15x15)wereremovedfromthecore.Thedepletedassemblieswerereplacedwitheighty(80)Westinghouse15x15(regionK)assemblies;TheWestinghousefuelassembliesareoftheOptimizedfuelassembly(OFA)designandmanycontaintherecentlydesignedpartlengthWetAnnularBurnableAbsorbers(WABA's).BoththeOFA'sandtheWABA'saredesignedtoincreasetheneutroneconomyandthecyclelengthofthecore.Westinghouse'ssafetyanalysisofthereloadfuelhasshowntheOFA'saremechanicallyandhydraulicallycompatiblewiththeExxonfuelassemblies,andwiththecontrolrodsandreactorinternalsinterfaces.AmoredetaileddescriptionofthenewOFA'sandWABA'sisintheattachedAppendixIXA.Theremainingone-hundred-thirteen(113)assembliesconsistedofforty-nine(49)regionHandsixty-four(64)regionJfuelassemblies,allExxon15x15.CoreloadingdiagramsforUnit1Cycle7andCycle8areshowninFiguresII.landII.2respectively.(Coreloadingpatterndiagrams,illustratingthedifferencebetweenCycle7'scorede-signandCycle8'snewlow-leakagecoredesign,areshowninFiguresII.3andII.4respectively.)Thefirstfuelshuffleproblemsoccurredat.approximately1330hours,onAugust18,1983.The"framedown"lightwouldnotactivatealthoughtheupenderframewasdown.andthewinchhadshutoff.Afterseveralseconds,thelightactivated,however,thewinchcablethenfelloffthewinchintothewater.Apparentlythecablehadunwoundtoapointsuchthatthe"ball"thatholdsitwasabletofallout.Adiverwassentdowntorepairthewinchwhilerepairsweremadetothe.limitandproximityswitches.Thesystemwasdeclaredoperableatapproximately0100hoursonAugust19,1983.Atapproximately0630hoursonAugust22,1983,anerrorwasdiscoveredinthefuelshuffleprocedure.AnunusualpatternfortheshufflehadbeennecessarybecauseofthenewWABAloadingpatternandtheadditionoftwo(2)newsecondarysources.Thispattern,however,wouldnotallowcoresubcriticalbehaviortobeproperlymonitoredonbothsourcerangechannelswhileanactivatedsecondarysource,SSS,wasabsentfromthecore.Minorchangestotheprocedurecorrectedtheerrorandtheshufflecontinued.ThisproblemagainoccurredinthesequenceinvolvingSS6andwashandledinsimilarmanner.
J'K Atapproximately0800hoursonAugust23,1983,aproblemdevelopedwiththefueltransfersystem.Thepneumaticsystemairpressuredroppedasthetransfercarttraversedfromcontainmenttothespentfuelpit.Later,thissameproblemdevelopedonthere-versepath.Aftermuchdiscussion,itwasdecidedtoresumetheshuffletocompletetheremainingsteps(approximately10)withoutrepairingthesystem.Problemslaterdevelopedwiththesolenoid,whichhadtoberepaired.Thefinalstepsconsumedagreatdealoftimeasthesystemfurtherdegraded.Atthistime,repairshavebeenmadetothetransfersystem.Thesolenoidhasbeenreplacedwithanewsolenoid.WestinghouseFuelAssemblyHandlingDeviationReports,FAHDR's,numberedapproximatelythesameastheCycle7fuelshuffle(27versus24).Withtheexceptionofthepreviouslynotedinci-dents,themajorityofthereportsinvolvedproblemsassociatedwiththeinsertionofassembliesintotheirspecifiedcoreposi-tionsbecauseofminorbowingorbecauseofin-placeassembliesleaningintoopencorelocations.SomeFAHDR'sweretheresultofminoradjustmentsofthemanipulatorcraneindex.Binocularinspectionofnewandirradiatedassembliestookplacebothinthecontainmentandinthespentfuelarea,thusoptimizinginspectionconditions.Allirradiatedassemblieswereobserved.fromasmanyanglesaspossibleastheywereremovedfromthecore.Additionally,thoseassembliesdischargedtothespentfuelpitandallnewassembliesunderwentamorethoroughinspectioninthespentfuelpit.Eachassemblywasslowlyrotated,thusallowingtheobserveramorecarefulinspection.Allassembliesplacedintothecorewereinspectedastheywereinsertedasafinalcheckforanydamage.Thebinocularinspectionoftheassembliesrevealednostructuraldamageorabnormalities.
FIGUREII.1,D.C..COOKUNIT1CYCLECORELOADINGDIAGRAM,(INITIAL>>CONDITIONS)RPNLKJHEC8AIIIII75I105lJ59lJibIII19I91lJ23lJ05I09I15lJ07IJ35I95IJ38I52aJ51IIe35I12&IR35IJ02IJ31I640II&7eR37IJ13I630IIIIIa90sR25IJ12I61&l94sJ47:104,'7IJbiIJ44a~aIIIII---2~89'R10I2&IR'3'3IIJ43eJ20I642I653II~IIIIl05l115l809l44IIJ09I609I635IH40IIIIIIl48IH49I'IR4&ISS&I638I603IIIII129ISbIR19IH17~IH14I65SIII818s72I618IH30IIsl&8sl84sH59sH22IR2&I648IIblIH21s41sR03s130s614IJ25IJ39IIIIIIIR29I11&I108I620e647IJO&IIIIIIII~70I03IR12a4&I&5lJ50IJ54I611IH19I65blR39l77'IH37IH5313I3&s42sH24sH57sHISIII101IR04l110I32IM48~645iJ28lJ42IIIIII33I605IIs~sIIIIIIIIII20IH&2I153I.RO&lH45l657IR20e63bI25IR24I29e&9I119J15l623~M15sH09IH28I155IR15IM41I6507'lIR17IbIH33sH34I632sJOIIIIIIIIIIIIIIIIIIIIII43Rlbi78s124IH39I643aJ27IJ52I99I15SI628IH47aQ7~22~R27I37iR28IJ48IJIOI613IHI2IH03I80IH04I74I113l98H27I627IH55IIIIIIs17'lbI55IR38'IHIOI654IbbIR551HliIBb5IR48I6&4I12SI85'3'e1&0IR07I73IJ24I625s602I6&3'IH2&R21I43IROBI10&659I604I631IJ30I~II~IIII~aIIIIIIII~II',04I845I71I92IcyIHOBI619IJ55IJ32IIsR40IH35I127I157I621~M4bI40s21I634IH&0IIQbe5&IR02s103s53IJ2&IJ03e637IH32IH23III97IHOb~IIIIISIIIIIl111IR44s02I122I14s814i15&IRQI.~J33~639IH43IH&3eH50I655IH44I6&1IIII~III&QIM31I154IR42IH25I60bs9&I11IR52I42~IH38IH20I617IJ041.0eIIIIIIIIIIIII805IIQ7I109I652IH29I607I50I93IJ&0IJ45IIIsi81IJ29IIs123isJ17s12e651I54siM&4IR3&eMOIII01IH42III23asH58I49I30sH51i'05IB2IR22I121IQBIHblI6&0IJ57IJ37IIIs159'IJ&3-IIs117sJ22IIIlRlls.125s629's615II,I102aMI3~&2~7&IH54eH3bI10IH07l831s6&2II120sR41a79I641a62&IH52--12~IIIIIIIIR47s'28s644eH02IR32I64&I,--13Ii'S5IBOII834I88IR30I27IR50~JSB~608s610~H5bI612IIIIIIIs85IR23a649IJ19II~IIIIIIIIIII45IlJ21IIII83I51JIBIJ41I59sJllI849'22IIIIIIs813l624I47eR51IJ&2I633IIs118lJ53I38s39IJ5&IJ34III&4IJ3&I100sJ14I18IJ40I58IJ&4~.e50I24iJ4&IJOSI34IJ49-1518090-t-2700IOIIIsaOsIMORN FIGUREIIe2D.C.COOKUiVIT1CYCLE8CORELOADINGDIAGRML(FINALCONDITIONS)"iRPNMLKJHGFEDCBA~III~~IIIIIllsIH20I03sJ54IIIIIII28IH02IR09IJ15I12PK13aX&0eII76ISS&I4PXOSZIS03ZLI4PX04ZI02ZLe23III1If26'12PKLO'35'12PKI7'37'I".PX32'25'I:PXI2'4'7J31'X79',J51:Ktl,'13;Xol:J44:X75:J47'HS&12PKLB,'331'1&FXOBI'R46I,I&PX25;RLS:l&PX12;R25:12PX22;R29,'2K48IJ06,'44,'32IX15IMQBIr40IJ09IXhbIJ3S'43~I~~I~~IeRIO'4I47ll&PK05l819lf&PXL9l59I34,'03112PK20l110J20~J36~J&2~XIOeJhb'lh~JlIIJ49IJ25IK&9IJ28eIIIII~Ie~s~~~~a~IIIIIII96~12PKI9~RI2I32I55el&PKIII153~91IR39~1&PK23I21~70IR04I12PK27I122eH38IK56IJIB~J42IHfOIK02~M45Ij05IHhlsX32IM&0IJ50IJ56IX54eH&3~Ie~IIIIIIII~IIIIIIII~~I,~III~804ZLeR24il&PK13'I71'l&PX09R2012PX04RO&12PK07eR15'l&PKLBI56Il&PKlhs817I806Z'65'43,'X39.'55,'X33:M52:K21:MLB:KLB:M19:X22:J03',K2&'J39',K73',IIIIIII~IIIIIII~II~4PK02ZI12PK21IR27I16PKQ&I828I12PX25I07'ISSI2I09I12PK15~I8I1&PK22IR16I12PK03I4PK07ZIIK67lKlbIH59IK43IH27IK13IJ48IJlbIJ07IK35IH47IK05IH14IK36IK49I~IIIIII'IIIIIIIIIl809ZLlR53ll&PK04lR07'28IR48IlllIR55I16IR38I106'2l'1&PK03lROBIBOLZLL8IK51IH48iK41IJ52IJ24IH26IJ33IH05IJOIIH16IJ30IJ26eK28iH29iK52IIIIIIIII~IIIIIIIIIIIIIIIIIII4PKOSZI12PKOBIR02116PKIOI97I12PKIII18I24IK76IK42IH54IK17IHQ&IK27IJ40IJOBIIIIIIIBQSZLlR44116PKOIl78I16PK24IR14I12PK29IROIIK45IJ17IKOBIJ27'IK23IHblIK04IH&4I92i12PK28I840I16PK20iR45I12PK31I4PKQIZI9IJ32IK09IH46IK31IH07IK37,'71IIIIII~III12PK02l842ll&PK15l2211&PK25lR52I807Z1110IX07IH21Ik2SIJIOIK30e'22IK64IIIIIIIIIIIIIeIIIIIIIIII~IIIIIIIIIIIIIIaIIIII93112PK23IR34I7S90IJ4SIKBOIJ58IJ59'12II3fIR41'i12PK14'IR30I16PK28IIH34IJ14IK47IJ&3IK38IIIIIIIIIIIe72s51el2PK03IR49IH30IJ41'K50IJ21II84IBIOZLIIH22IK61IIIIIII16PK02IR31I1&PK16~67i9SIR23I12PK09I121I.K24IJ23IK29IJ13'IJ38eJ19aK59IJ57Ia~IIIIII1$IIR50I16PK07aR47el6PK27IR32I12PK05IRllI29H12IK19IH39eK34IJ29IK53IJ04IH15IIIIIIf18a48a12PK24IR13I12PKOIIR51I12PK16IK20IM40IKO&IJ34IK70IJ53'49IISSSI129K78'17I4PK03ZIBOBZLehPKQ&Z>k&8IK&2IK57IIIIIIIIIIIIII87I12PK06IR05e08I98sl&PK2leR36ISSIII154I16PK17I66I50IR22el2PK26I69'33IK74'02IJ37'55IK12IH44'&4lH2S'03'tl~IJ60lJ&1IX63IH09f80I90-i-270I0IPIIIIaoPlIMPRTMtOFATHIMBLEPLUG
~ra5~~rrFxla@a@raarr>+{II8>~ii>paarK+{,.y~<aqua~rewra>]jg)~jaaae)3I@y~grg~)~(5~<4@@y~qg~al5I>ly~gi~5Q)5~()ggLLA~5@arringrra%rare FIGUREII.4D.C.COOKUNIT1CYCLE8CORELOADINGDIAGRMTN180'//r.+j,-'/u900.;.Y'.g/I270oIQ'/*/'.p/I*10121315RPNi1L~KJHGFEDCRegion800Enrichment:Region9-J-Region10A-K-RegionlPB-K2.9052.9033.33.6 pl4I AppendixIIAWestinhouse0timizedFuelAssemblies(OFA's)andWetAnnularBurnab'lePoisonAbsorbers(WABA's)Westinghouse,inordertodemonstratecompatibilityoftheOFAwithENCfuel,chosethefollowingapproach.ENC,ines-tablishingtheirfueldesign,demonstratedcompatibilitywiththeWestinghouseLOPARfuelusedinUnit1Cycle1.Westinghousehasshowncompatibilityofthe15x15OFAdesignwiththeLOPARdesign.Thus,compatitbilitybetweenOFAandENCfuelwasshown.ThepurposeofthenewOFAdesignwas.toimprovetheutili-zationofUraniumwhileallowingoperatingmarginstobemaintainedThe15x15OFAdesignissimilartothe15x15LOPAR(lowparasi-tic)designwhichwastheinitialUnit1fuel.ThemajordifferenceinthetwodesignsisthatthefiveintermediateinconelgridstrapsoftheLOPARfuelwerereplacedwithzircaloygridstraps.Theverylowthermalneutroncross-sectionofzircaloymakesitlessparasiticandhenceresultsinbetterneutroneconomy.Thezircaloystrapsarewiderandthickerthantheinconelgridstrapsinordertoduplicatetheinconelgridstrength.TheENCgridstrapsarebi-metallic,consistingofzircaloy-4strapswithinconelsprings.ThegridheightsofbothOFAandENCassembliesareequal.Acom-parisonofWestinghouse15x15OFAandExxon15x15assembliesappearinFigureII.5andTableII.l.TheOFArodsusethesamedesignastheLOPARrods.Asthezircaloygridstrapsarethickerthantheinconel,therehasbeenareductioningridstrapcellsize.ThisreductionresultedintheOFAguidethimbletubesinnerdiameterabovethedashpotbeingsmallerthantheENCthimbletubeinnerdiameter.Belowthedashpot,thedimensionsarethesame.Thereduceddia-meterprovidessufficientspaceforallinserts;however,theTechnicalSpecificationroddroptimelimithasbeenincreasedtoallowforanticipatedincreasesinroddroptimes.Allaccidentanalysesusedthelengthenedroddroptime.MinordifferencesbetweenENCassembliesandOFA'sinclude1)theoverallheightoftopandbottomnozzles,2)theadapterplateflow-slotconfigurationandholddownleafsprings.Thesedifferenceshavenoadverseaffectontheinteractionofthetwo(2)typesofassemblies.TheOFA'susea3-leafholddownspringdesign(aspreviouslyusedinLOPAR's)whichprovidesadditionalholddownforcemargincomparedtothe2-leafENCassemblyspring.TheOFAbottomnozzle,althoughsimilarindesigntotheENCbottomnozzle,hasareconstitutablefeature.Thisfeatureallowsittobeeasilyremoved.(SeeFiguieII.5)TheOFAdesignutilizedalockingcuptolockthethimblescrewofaguidetubeinplace,whereastheLOPARdesignutilizedalock-wire.Thisfeaturefacilitatesremoteremovalofthenozzleandrelockingofthethimblescrewsasthenozzleisreattached.
'aL<
TheburnupdependentrodbowfortheOFAdesignwasconserva-tivelyassumedtobethesameasfortheLOPARdesign.Significantrodbowismainlycaused'yrod-gridandpelletcladinteractionforcesandwallthicknessvariation.OFAfuelrodsandLOPARrodsarethesame,thuseliminatingtherodconsideration.GridforcesarereducedbecauseofthezircaloyspringsinOFA,thusrodbowcanbepredictedtodecrease.,Fuelrodcladdingwearisdependentongridsupportandflowenvironment.HydraulictestsbetweenENCandLOPARassembliesandOFAandLOPARassembliesshowedsimilarcrossflowsbetweenthetwosets.Theresultsshowedsmallcross-flowbetweenassembliesandnosignificantrodwearduetovibration.Extrapolationshowedthatcladwearwouldnotimpairfuelrodintegrity.ThepurposeofthenewWABAdesignwastoreduceresidualpoisonpenaltyattheendofcycle.Thisinturncould1)aidinreducinginitialboronconcentrationandthusmaintainanegativebeginningofcyclemoderatortemperaturecoefficeintand2)aidinextendingcyclelength.Additionally,the.WABA'saidinflatteningthepowerdistributionandincontrollingpowerpeaking.Theim-provedWABA'saredifferentfromtheolderburnablepoisonrodsinthefollowingways:1)aluminumoxide-boroncarbideisusedinsteadofBorosilicateglass,2)tubingsaremadeofzircaloyinsteadofstainlesssteel,3)theannularplenumcontainsheliuminsteadofairand4)theinnertubeisopen-endedallowingthereactorcoolantflowthroughitinsteadofbeingfilledwithair.Additionally,theWABArodsarereducedinlengthto123inchesanditscenterlineispositioned1.5inchesabovethefuelrodcenterline.ThusthedesignbenefitsoftheWABAarebetterneutroneconomyfromthelessparasiticzircaloytubes,theincreasedwaterfractioninthecellwhichincreasesthethermalfluxinthecellwhichincreasestheeffectofthepoisonandthereductionontheendofcycleboronpenalty.IIA-2 TableII.'1ComarisonofOFAandEHCAssemblDesinParameter15xl5M15xl5OptimizedFuelEHCFuelFuel'AssemblyLength,in.FuelRodLength,in.AssemblyEnvelope,in.CompatiblewithCoreInternalsFuelRodPitch,in.NumberofFuelRods/Ass'yNumberofGuideThimbles/Ass'yNumberofInstrumentationTube/Ass'yCompatiblewithMovableIn-CoreDetectorSystemFuelTubeMaterialFuelRodCladOD,in.FuelRodCladThickness,in.Fuel/CladGap,milFuelPelletDiameter,in.GuideThimbleMaterialGuideThimbleID,in."StructuralMaterial-FiveInnerGrids159.765151.858.426Yes0.563204201YesZircaloy-4,0.4220.02437.50.3659Zircaloy-40.499Zircaloy-4159.71152.078.426Yes0.563204201YesZircaloy-40'240.0307.50.3565Zircaloy-40.511Zircaloy-4StrapsInconelSprings"Above'ashpot
APPENDIXTable,II.g,'(coni:inued)Parameter15xl5WOptimizedFuelAssemblOesin15x15ENCFuelStructuralHaterial-TwoEndGridsInconelZircaloy-4Straps,InconelSpringsGridHeight,in.,OuterStraps,Valley-toValley2.252.25BottomNozzleTopNozzleHolddownSpringsReconstitutable3-leaf2-1eaf FIGUREII'SCHEhIATICOFWESTINGHOUSE15X16OFA159.765(W)REF.159.710(ENC)161.85(W)REF.152.07(ENCI2.738(W)REF.2.72(ENC)3LEAFSPRINGIW)2LEAFSPRING(ENC)3.55FWIREF.3.48(ENCI15331(W)REF,153.26(ENC)134.63REF.108.44REF.82.26REF66.06REFCGRIDTYP29.87REF6.668(W)REF.6.645(ENC)W-WESTINGHOUSE15X15OPTlhIIZEOFUELASSEhIBLY(OFA)DlhIENSIONENC~EXXONNUCLEARCOMPANY(ENC)15X15FUELASSEhIBLYOlhIENSIONNOTE:OFAANDENCASSEhIBLYhIIOGRIOSHAVEIDENTICALAXIALSPACINGSENCGRIDHEIGHT-2.25WESTINGHOUSETOPtcBOTTOMGRIDHEIGHTS~1.6WESTTNGHouSEhIIDGRIDHEIGHT~2.25ComparisonofENCFuelAssemblyDimensionsWithVlestinghouse15X15OFASchematic*GI$s1~t3'4 IIIINITXALCRITICALITYUnit1Cycle8achievedinitialcriticalityat2103hoursonOctober20,1983.TheAllRodsOut(ARO)Boronwascal-culatedtobe1572.4ppm,ascomparedtoadesignvalueof1534ppm.TheapproachtocriticalitybeganwiththewithdrawaloftheShutdownBanks.ShutdownBankwithdrawalbeganat0133hoursandwascompletedat0219hoursonOctober19,1983.Thenextstepwastowithdrawcontrolbanksinoverlap,asshowninFigureXII.l.Thewithdrawalofthecontrolbanksstartedat0240hoursandwasfinishedat0400hoursonOctober19,1983,withControlBankD-(CBD),at190Steps(CBDat.190Stepscorres-correspondedtoapproximately100pcmofnegativereactivitystillinsertedinthecore).At0420hours,afterthewithdrawalofCBDto190Steps,RCSdilutionbeganfromapproximately2220ppmtoapproximately1700ppm,at.adilutionrateof60gpm.BecauseoftheanticipatedbehaviorintheInverseCountRateRatio,ICRR,duetosecondarysourceplacementinthecoze,seeSectionIVc,thedilutionratewascutto30gpmat0600hoursonOctober19,1983.Dilutionwasstopped,pendingPlantManagersapprovaltoenterMode2,at1032hoursonOctober19,1983,ataboronconcentrationof1729ppm.WhileawaitingthePlantManagersapprovaltoenterMode2,ControlandInstrumentation(CGI)personnelperformedTHP6030IMP.038,A.R.P.X.CoilStackVoltageData.Duringtheperformanceofthisprocedure,four(4)rodpositionindicators(RPI's)weredeterminedtobeoutofspecification.Afteraholdapproximately30hours,duringwhichNuclearSectionpersonnelperformeda"glitch"testtoverifytheactualrodheightoftheRPI'sinquestionandC&IpersonnelcompletedarecalibrationofalloftheRPI's,permissiontodilutetocriticalwasgranted.Dilutiontocriticalwasreinitiatedatarateof45gpmat1812hoursonOctober20,1983.Mode2wasachievedat1930hoursandtheUnitwassubsequentlydeclaredcriticalat.2103hoursonOctober20,1983.TheReactor'sstablecriticalconditionswere-8CBDat169steps,fluxlevelat10amps,andaboronconcentrationof1552ppm.DuringthedilutiontocriticalXnverseCountRateRatio,ICRR,datavs.BoronConcentration,PrimaryWater,and.timewereplotted,andisshowninFiguresIII.2,III.3,andIII.4,respectively.-8AftertheReactorwasstabilizedat10amps,datawasob-tainedtodeterminetheZeroPowerPhysicsTestingRangeand,NuclearHeatingLevel.CBDwasmaneuveredbetween169and176Steps,atdifferentfluxlevels,inordertoobtainreactivitychanges,(seeTableXXX.1)Fromthedataobtained,the.ZeroPowerPhysicsTestingRangewasdeterminedtobefrom-8-73x10ampsto3x10amps.SeeFigureIII.5.NuclearHeatingwasdetermimedtobeatapproximately7x10am'ps.
NuclearHeatingdeterminationismadebyobservingadecayinthereactivitytraceonthe,reactivitymeterstripchart.Atthesametime,anincreaseinRCStemperatureisnoted,asthefluxisslowlyraised.Thephysicstestingrangeistypicallyapproximatelytwo(2)decadesabovetheybackgroundlevel,andapproximatelyone(1)decadebelowNuclearHeating.Theybackgroundismeasuredpriortotheintroductionofpositivereactivityfortheapproachtocritical.Atlowerfluxlevelsthereactivitychangesisaffectedbysmallvariationsinflux.SeeFigureIII.5.Thisisduetothefact.thatthebackgroundremainsconstantwhilethefluxcanbevaried.Atlowerfluxlevelsthebackgroundismorepredominate.Asthefluxisincreased,thebackgroundbecomeslesssignificant.Aplateauisreachedwherethebackground,doesnothaveasigni-ficanteffectontheobservedreactivity.
TableIII.1SubcriticalDataInducedcurrentwith1000.Vappli'ed=+0.14x10.amp90$'value=0.126x10amp-8508value=0.07x10'mpZeroPowerPhsicsTestRaneDataFluxLevel,amsCBDinitialposition169steps,CBDfinalposition176steps(~p,pcm,forvariouscompensatingcurrents)Disconnected50%value90%value5x10-81x10x10x105x10x102x1021.624.326.126.S26.5.,25.725.624.525.527.026.025.725.426.027.726.226.026.025.-224.725.026.2526.4CBDinitialposition203steps,finalCBDposition211steps"0.3x1026.127.027.4-0.3x1025.8NuclearHeatinLevelFluxLevel=7x10ampsZeroPowerPhsicsTestinRane*FluxRange=0.03x10ampto0.3x10amp*Duetothequalityofthedataobtained,nocompensatingcurrentwasrequiredduringzeropowerphysicstesting.
'1i'4yT FIGUREXIT..1ss,r(r,'sI'<'sI1.09,Il!8<!-76.2.00>>'<s:<I'>>I:sr,'I,>'a~',20,s,s.)r<rICRRvs.CONTROLBANKWITHDRAWALINOVERLAPUNIT1CYCLE8STARTUP!!<1(<<!}P>>2!Ifs!ij!h<!<'i<>>rmrs>>!>>s<f<<fr!<Hpj1,'jjjj!;IIf!i:r!I<h1)h!a,ps!:8!r<Hs<.'<<1r>>>><ls.:<<1I'Hi<>>rpjsillIrasr'<<!lj:(}!1'rIf[IQl!,s[r!i!!ai<l<<Ir<h:<.V<<j'<<<<0!}!fjs[<<;tp!V.,<Prjr<<.[lr.Ifj!,)jI:ljIP:<lljarsp.If>>Vrlap<>>jj!<r!i:r.!siih!hi'jhiHf<lhif!j'it!s<<>>!ii<<:IH>>jHH(j').'pihastConservativeMonn.'l<lil1st<ls1<:I'1<Jrp<<'s>>,I!1T<,sIrpllh,p<siI.1[sj:j!h!h.I!Nil',)V<<f!sHs!(1:ljsrfjssa!!'1ir8tr<rr;sr<g<1IHist!s!jr>>IIr<r<!a<~'hi>>j'f,'IP>>s'srHIs<<'.rIpr!.<I<<HIs<<jp<rs1!1,,!,'<(i!'Pjhrrj[H!<j'[!s'<Hir)!,J<<j!<rI!H!rl>>!,rj<jh<hHH!<<sIjp>>'<P'H<!P}I'f!hjlh!(isI'(II!),1Is<Hfjp'.!iit'Ijjpr,j,>>I<<rlsi'Ih!<<<I4s'V's!1I.prls<s<>>rh<1hlhhspI:If<j<ItI!<!!fr[N<>><r<.<Hll.1!ii<lll!;[",'r!Iil1<i[fj<j<<sp!!!ri!jHIhj::fi'jl(0<!!I'Hl<'tljll)I!rlllii:ip!ii'Ifi:.isrpjp<f[Tii:!I>>jIs[s>>pjl',,ll',Hj)j};,'!1Hl'psI<j<H}<<jt'Illf!LIV!sl8!li'arr')1!t',!j.H}'Vr!iPhss<<)<p<)+rils<<r(~<>>fi<'Ijp(jjPilisr}ir;4sr!<sr'<<V!rfs!I<'ll)lf(ljl!'if!rlar,<lifi<I'i}!}lII!Ilis!<I<}<Is:rr<<'s.r<[11:f>>fiiii}ifjuljh<!rpi'j!Isa}<,Np!i.:.a!jii}Ij(j,r<<s'r'f<<h[<<,!Hi!>>r<<>>I,<<8!HH<<fri.fiffi}!Ii<<<'jr:,(!!!h:![fr1[i<rl'!l:;ilt8!!p<<1[r[pi<l<>>ih!jl[T[a!)llpij)jl'1)Vl,is!l.[I'I+j<<)>>j!11<>>ls<<'<s<j!1<,(..rr-..!jf!(<<r<r!!.I'<F.H!)sr<ps;1IP!Hpj'T!}!!:.<}'j}!:I<f'ilp'firil}<+}<}[11!i<N0)!(<<!.s[<.!!!jl<<:i<L<s,>>rls<<(<<jji'<liiHs!s(:(f+lrlr.<r!hs<f'<<'<f!iiij(~T}i,~[j)I!>><.tI<H<}jljjfi'P}!h!>>t<<lpif!rhlifr;r>>!r<!t!ji;[htj8<1!I!lii'lIfH!!'r>>~.Ir)hl}r<<flsp,>><IhH'<!'pH1!i!!'H,<vi<hHrr1[.1if'iHfihHi<>>!<<<j!!<!sj'"'jjsV<!<1:V.'<Hi!I!Ip1)[slha!<<3i!ah<>>,!<<'!H![.ir,!sHI!>>rj<hr:!f:HH':Hh:<hh!r<<rHVi>>0lj;1tfi'I!ff<H>>I!'Ht)lipsa'h',;>>IHHhjll)jhl'<r;'!<sI"ss'Vrlsjsr>>,'>>,<I!"'r:<<,'r<.Hlr:PPs~s<aI}>>!hr(!Ir<!H.<7!Ils>><r!i<<(!IIhl!<<fsii[H[H1$}<[!!f!s}(I![PIprjp>>:'>>'!<jp!!<r:I!'ijI>>if[i!r<r!'1<<jp}fl:<!!!ijr!!r,H<1',Iiil's[1(!!:Hs~1!jir'",.r!I,h!jirr'V",rhhrih<'!<s:<Ls<:(<<sHlI<!<<EIIp'<!!!<<I~}HIh!T'.:1>>.<'<<<Hisf.0'<sH<1llI'hll(j!<1jH!'j!fiiii'r!!li'i>>>>>>>>s<jli)rsrHj!JJj<j<<h1<'!s<H!1w)rHr<>>>>hi!!<<<ls<hlH0.'![f,.h'!11<IPtrj!g(<<<II<'jss1!'.a1jr:<ri~'1!'p!1!)j>><llj<hj!>>r<hli}jH'I!t.1!H!!'hrls'l}s!P,J->f}L'[I<H!!<1rpt'.1<<rV<<p<i<p;sr<<ip<<,sr>><0r<'<V<V<r<l)sIIH<sP;lj)lV<ij[<>><tr.rrIf:j,!}1l}<>>I:f!Hll((lsp!P:>>r':1<r<<vrf<<T!i!1rH!I!t!jhsjiiii:p<V<s'!j:!<<<.Ijijs;iI'.:<l<<'<jrr<<rErH<!Isl'>>I(p!P!f)P!s![<sl1!ffl!.:<.1j}hr:!'1!r.Hs)jjji!!}jt<!j!!!If)'ir:,H!hsljl8foal:<<J}r!<'.t'!'lr1)1s)<H<'j)<(j}!'j'1!:sL<}i<j}',}1!ji1~<!H!'1!!<.r>><I'lj"r'}!j'I>>,<<r~rlssar<<:.8!<If(>>:!I>><ripV<rsr)(i!!j}';'.ri'p!'.2<."f!j!P,:V.Hliji}j.<ri'.r:!I:,Ilr;>><i}<1[<H!>>I1st'.Vi)[<'Hp[riV<<HH.!gj'jH!,.<rf<<<<<i'fijT<<<jf<<P',r!<<p'r<}8<<}!}:)H!r!,:<Vr'rs<.H<<)r<<I1<:(I,>>,<I<!;<!'>>:!l'(ist!sr>>rh>><<h<sslp>>jpPlfr~>>'Iltf}f:<!<V<<'0<)i(~j'r<!-"ILIs[!<<j<<I!jl>><hsfl!IV!r'8:ilH!j0r.:1![5<>>:<vlh<j<<<<(<!.j1:l,';!!:':,"Hjj'I'!h!I'1}<<1'(rHp'rrEil<P<!Hlifilr:r<<1pl<hjjl.<VI;rl.<1<'!jp<<1:H<j:I,H!jj}!i!f'<fss:H!s<>>p}tjl1[<)i'>>'li'jVr<f!jt!fili<lrp[<}iiihlpjsss!)r<<s'srppl<sr.<H<Ir!rs'r<'<<>>r<<I<sl![h<I<!lsIlh}IIIijf!hlf!}IIip,'ihr('jpjt!NisrI'lf0'!<ir'<<<Hj<0jli!<!I!<<llilt<111'rIIhlli([1If.'f'~'l!<jiI!I'f[f}lljrilli!IIs'pij!;[1<j(l},!jllj;r"r(ipt<r<pjlj'!.Is<'!<V<<'(I<hII,!IIIIlli!IjI>><.sipih:'HffhHt!s['iPf,ijljilfjlji!>>I'pPVq}j'(irh2;sli',N<<<}<!!.I!Vrs<'hf!j:i!<ss'.1[!alfI(<s)r<(<fr:)<Ps)I<if),j}h!fj<<s<riHh(!j!i:It!!Hj!!i'!'(lj8l<prs!jH!'if,.'<r,r<<l,s[;(sa!1<sV<180200sraissr<a<s~a60I!!,.1:!'ih800140j~sass<&JJ<020160Jr<lvJs440V220CBA0ir012Samar.<~sJSjl>><fjaslH401608200<r:680100120.~<,lr~<A<ssrt..9<<<>>r<3>asr>.r.T'hT.>>~-.~:T910CAA,0204060(IQ100120140160180200220CBCj.hs'l'ps<lhr8!sh<1H!!HHlr!)'I:s<8!IVH('8!(HH<<<s(sh>><aha('<Sar((1!~<LTL<:<H!(0"L<p(1f+Q20406080100120s<<<H<,'!H<<<I!<r<<H<<<h<H<<8<<<<8<<<<,!1<<Itassa~aaa~ss~r<r<V<<<r'irr<'>>r<<'<tr'r<'jl'llj!'[I<H<220CBQ!}[I<<!j}I!}[iI[if!s~>>j:ji'ir":1401s<jgll',00}'II~'0!t<.<Ir<0!;jhl,l1'j!!j[hj!!Ti.,IPsrf<<(ss0200.Is'!t'ai!rf'rr<<rlgsl!'fsIjpj!'iij<<iIll'fl,'ir!r<<<1<t'<<<>><<<<!iH!Hh<<<r<<rtI!r<S[(a<[,<<,!Th0RodPosition(steps)inOverlap}li(1sff!'<:(li!)l!i!Ij!s'.[~!tIss Itg~0i0,n~' FXGUREXXI.21.04UNIT1CYCLE8ICRRvs.BORONCONCENTRATIONp5-~9.8~I,~~7J~54'3.24I~1722002100200019001800BORONCONCENTRATION(pPm)1700160ypL]5001523CBD8190Stops 'I~4 FIGUREIII.3UNIT1CYCLE8ICRRvs.PRIHARYWATER(thosandsofgallons)jtjhIlI~~I!IppedStodiluio10I1I101819F7/20PRIHARYWATER(thousandsofgallons)2222,92426/26.1280h UI~4tPl4P 1.0PURZXIX.4UNIT1CYCLE8ICRRVS.TINE0.0.0.0.o0M0cddi02hurs00.0.0.0400050006000700080009001000001900200021002200230024002500260010/19/83Dilutiontime(hours)10/20/83 PIGUREIII.5Unit1Cycle8II)F(-"1'>(4(-tVQNocompensationcurrentF50%comp.current90%comp.current%!QttQi-.F'=Ittttr~.FIt=':LL=I'",iit~~.I~~=.F=-r(-.=(=-"i==-~=I~t-t1x10~~IIt~~I'II'~~IIIINuclearHeat-FIFER(t!I-.itII-IIr.tt'1.I.=*~'1==~I1x107..~~~t'!'I'M+ttItwFFI'Pirl.(l-81z10tt.r(rI'.~--~~IFI=:I:PWIIFt~IIlt;t-F.'I~g('(t(ItAt'i;.Ei:-1=I1x10-'I~~t~III~-:E=~P20Reactivity(pcm)~t~253035 IVaZEROPOWERPHYSICSTESTINGZeropowerphysicstestingcommencedat0600hoursonOctober21,1983,andwascompletedonOctober22at1025hours.Thetestingprogramconsistedof1)AROIsothermalTemperatureCoefficient2)AROFluxMap3)IndividualControlBankWorths4)BoronEndpointsandBoronWorths5)ControlBanks.WorthinOverlapThetestingprogramwasroutineandwascompletedwithnoproblems.Thedatapresentedinthefollowingtablesandfiguresshows'compliancewithdesignvaluesandacceptancecriteria.TheModeratorTemperaturecoefficientcalculatedfromtheAROITCtestswas2.81pcm/F,therefore,norodwithdrawallimitswererequiredtoensureanegativeMTCabove70%RTP.AllcontrolbankrodworthdatapresentedherehasbeenadjustedinaccordancewithWestinghouse'srodconfigurationg/gcorrectionfactors.ThedesigndatautilizedinthisreporthasbeentakenfromWestinghouse'sUnit1Cycle8CorePhysicsCharacteristics,WCAP-10376.TheZeroPowerPhysicstestingisperformedforthefollowingreasons:2)3)TodeterminetheMTCandtherefore,assuretheMTCislessthantheTechnicalSpecificationof5pcm/Fbelow70%RTP.Tomeasurecontrolrodworthstoassureanadequateshutdownmargin.Toensurepowerdistributioniscloseenoughtodesignvaluestopermitpowerescalation.AsummaryofthemeasureddataanddesignpredictionsisgiveninTableIVa.lwithmoredetaileddatapresentedinthefollowingtablesandfigures:ParameterBoronEndpointsRodWorthsBoronWorthsIsothermalTemperatureCoefficientPowerDistribution,ARO,HZPRelativeErrorsinTheoreticalFactors,HZP,ARONuclearPeakingFactorsforEnthalpyRise,HZP,ARONuclearPeakingFactorsforHeatFlux,HZP,ARORelativeErrorsinFH,fromTheoreticalFactors,HZP,AROTableIVa.2IVa.3IVa.4'Va.5IVa.6IVa.7IVa.8IVa.9IVa.l0IVa-1 Thegraphicalresultsoftheintegralrodworthsandreactivityvs.boronconcentrationaregivenasfollows:ReactivityInsertedvs.BoronConcentrationIntegral&DifferentialOverlapRodWorth,HZP,BOCIntegralSDifferentialWorthofControlBankD,HZP,BOCIntegralGDifferentialWorthofControlBankC,HZP,BOCIntegral6DifferentialWorthofControlBankB,HZP,BOCIntegralaDifferentialWorthofControlBankA,HZP,BOCFicCureIVa.lIVa.2IVa.3IVa.4IVa.5IVa.6IVa-2 TableIVaslD.C.CookUnit1Cycle8SummaryofZeroPowerPhysicsDataAROCBDinCBCin(Din)CBBin(C<Din}CBAin(B,C,Din)BORONENDPOINTDesin(m)15341407132812641135Measured(m)1578.71450.51374.21293.01168.2CBDCBC(D.in)CBB(C,Din)CBA(B,C,Din)ControlBanksTotal.ControlBanksOverlapRODWORTH11687255961190367936791191.3740.1609.71207.03748.13683.8lc*CorrectedMeasured(cm)*1201.3741.3610..11179.63732.33668.2HZPBOLBORONWORTHDesin(cm/m)-9.22Measured(cm/m)-9.13HZPBOLITCDesin(cm/'F)0.71Measured(cm/'F)0.70FLUXMAPSHZPAROF~~~DesictnMeas.1.5321.6296~@~*DesicenMeas.2.0272.2964F(Cozeav)~esicenMeas.1.3211.3546*AdjustedforWestinghouserodconfiguration8/Xcorrectionfactors.**Measured,unpenalized. TableXVa.2Unit1Cycle8StartupTests1.BoronEndpointDataRODCONFIGURATIONAROAROCB(ppm)INDIVIDUAL1572.41585CB(ppm)DESXGN15341534hC(ppm)MEASURED-DESIGN,38.451AROavgCBDXNCBCINCBBINCBAIN1578.71450.51374.21293.01168.21534140713281264113544.743.546.229.033.21Theboronendpointisthejustcriticalboronconcentrationfortheparticularrodconfiguration.
TableIVa.3UNXT1CYCLE8STARTUPTESTSRODNORTHDATA(inpcm)Banke/~1MeasuredCorrectedDesign%ErrorWorthWorthWorthCBDCBCCBBCBA1191.3740.1609.71207.01201.3741.3610-11179.611687255961190+2.77+2.20+2.31-0.88CONTROLBANKSTOTALCONTROLBANKSlNOVERLAP/3748.13683.83732.33668.236793679+1.43-0.291.AdjustedforWestinghouseg/XConfigurationCorrectionFactors.TablesA.lbandA.lc,Unit1Cycle8DesignManual(WCAP-10376).CorrectedWorth-DesinWorthCorrectedWorth )~'~~~L~~~)~~~~~~~0~~~~~~'0~~~~eI~~~~~~I~~~~~~~~i~~)-oo~a~- TableIVa.5Unit1Cycle8StartupTests'ROIsothermalTemperatureCoefficientDESIGNHEATUPITC(pcmlF)COOLDOWNAUERAGEERROR*ITCERROR*ITCERROR*'0-71,+-3.00.670.040.75"0.040.710.00.71+3.00.580.130.78-0.070:68/0.03*Error=Design-Measured TableXVa.6Unit1Ccle8HIPPowerDistributionCBD(steps)NBHFTBHAxialOffset(~)108-01226-2.29642.48353.83101.62961.927818.933PMeasured,penalizedby1.05and1.03NMeasured,upenalizedTTechnicalSpecificationLimit TableXVa.7V41080110>21/'832WRTPBOLillZPtAROt3DAtlALYTICALFACTORSRELATIVEERRORSAEP-TilltlBLLDATA6IMDETECTORTHEORETICALFACTORS'CALC.-tlCAS.)illCA.)FORAXIALCONFIGURATION2S.LKtttttttttttt-0.045tttttt0.031tttttttttttt-0.00Vtttttt-0.065tttttttttttttttttttttttttttttttttttttttttttttttttttttt-0.059tttttttttttttttttt0.010tttttt0.001f0.0080.033tttttt>ttttttttttttttttt-0.0115tttttttttttttttttttttttttttt0.060tttttttttttttttttt0.036tthttt-0.009tttttt-0.+!7tttttttttttt0.073ttttttttttttttttttttttt>>tttttttttttttttttt-0.029<<tttt7tttttttttttttttttt0.009tttttttttt0.077ttttttt'ttttt0.068tttttttttttt0.006tttttttr8tttttttttttt-0.061tttttttttttttttttt0.069tttttttttttt0.071tttttt-0'26-0.0'll-0-0359tttttt-0.053tttttttttttttttttttttttttttttttttttttttttttttttt0.0'l'ltttttttttttttttttt-0.069'l0tttttttttttttttttttttttt0.0'l2tttttt0.036tttttttttltttttttttttttt0.0'llll-0.025tttttttttttttttttt0.051tttttttttttttttttttttttttttttt0.073tttttttttttttttttt-002613tttttttttttttttttttttttttttttt-0.002tttttttttttt0.026tttttttttttt0.005tttttt0.018tttttttttttt-0.0610'20tttttttttttttttttttttttttttttttttttt-0.017tttttt-0.005ttttttl5-0.038tttttttttttt-0.07Vtttttttttttttttttt~1)THENFANVALUEa0.0029ANDTHESTANQQRDDEVIATIONs0.0'139FORTHEABOVE'l6VALUESTHENEANOFTHEABSOLUTElYALUESa00365ŽEtlhxltlUNtlAGNITUDEg00765AT7-lTHrHnvHrrAA'9~~~ TablelVa.a1080110/21/832'4RTP&OLIHZPtAROs3D-ANALYT?CALFACTORSAEP-THTN&LCtATABINUCLEARPEAKTNGFACTORSFORENTHALPYRISEFORASSEtlBLAGESINTHEPIIMERNORNALIZATION0.I011.0V'I1.1931.2671.2161.0850~'t170.2'l80.5601.09'I1.2511.'l301.1201~'I'l71.3191~12'I0.5610.25V0<<2500~6671.125'I,1371.3210.9951.23'I0.9871.31&I.1551.I't70.6790.2560<<565I~1211.'I121.I'I6I~0381:1701.0771~I'l21.0561.18't1.13'I1.155057650<<'tOI1.1061~I't&I~1780.8631.0030.8330.9980.839I,0160.8821.18'II.1821~1260~'t1261.0'171.2601.3071.0391.0'IO0.8081.0170.7861.0380.8171.0021.08'I1.3101.2861.07371,1561.V090.9891.1230.8271.03'50.9100.87V0.92V1.02V0.8VS1.1290.9561.V051.18981.2'l&I.113'IIO1.0960.9750.7630.8760.6910.&770.76't0.9661~0931.2151.0821~25791.1961.'I'lI~018I.IV&0.8331.0VI0'250.8900.9301.0300.&361.1260'731't371.231101~0831<<298I~3181~022I~0290~830I~0520.7891~07'I0~8191~017I~0271~2881~2801~092110,'l101.I'511~1581.1500.8701.0250.83V0.9960.8'l31.035'I.&531.1't&1.1'IO1.1360.'lll0.5721V81.1221~1591.0311.I'IOI1.0991<<132I~0'l71<<1651<<1191<<1320<<567130<<2520.6791.1V61.1501~3130.9&V1'380'891~3191l9F1'l90'750<<255IIV~0.2510.56$1~11112651~'t651~1031~'t25'I2721<<1210.5700.2560.'ll61~1021~2171.2&V1.2051~0900,'V06 TableIVa.91080110/21/832XRTPBOLtHZPtAROt3D-ANALYTTCALFACTORSAEP-THIIIBLEDATANUCLEARPfAKINGFACTORSFORHEATFLUXtFSUBQtFORASSEIIBLAGESINTHEPOIIERNORNALIZATIONRPCBA0.5'l91.I'I21.6361.7'I&1.6791~5170.577I20~3'IO0.7651.'l9'I'l.7131.935l.5111.9681.8091.5500.77'I0.3'l70.339'0.9091.5331.5331.7791.3311.6501.3181.79'I-1.5931.5780.9310.3500~76I1~$201~5021@5461~3881~'5531e1371~517'Ie4121~6361~5661.5780~78250~'5'I&1.5011.5501.5931.W31.3291.1101.3391.1191.3561~1801.6361~59V1.5270.5591.'l611.7191.7501.3911.3791.0821.3781.0531.3931.09'I1.3V61.'I'l&1.7521.7'l51.'l691~6101.9111.3251.'l961.1031.3951.2391.1971~250I~383I~121I.'I9812701.&921.6P51.7231.5071.6631.4751.3'l51.0351.2120.941l.1981.0271.29'I1.V511.62'I1.'l561.72'I9'1.6'I'I1,9521.3681.'5331.1'121.I03'1.26I1.22.1.2'191.3801.1061.I&71.29V1.9'Vl1.700101.'l921.7721.7691.3711.3691.'1131.'l311.07'It.'l601.0911.3'l&1.37'I~1.7171.7351.508110.5601.563'1.5681.5561.1711'711.1221.360'l.1371.3901.1'l71.5611.5'l11.5450'61120.7771.5651.5241.5721.389I'5'l11.4961.5301.'l201.5911.538'I~5500.771130.3'I'I0.9231.560'I.5691~7761.3301.67313VI1.7911.5691.5670.92'I0.3VB'0.3'l60.7771'2717'l22.0181~51'I1.9551511.5370.7830.351'50.5771.5'l51.7031.8061.6791.52V0.558 1TableXVa.l010801IO/21i832WRTPBOLiHZP)AROr3D-AIIALYTICALFACTORSAEP-1IllliBI.EDATARELATIVEERRORSINFSUBDELTAHCALCULATEDFROIIkCIGHTEDTHEORETICALFACTORS'CALC~-tlEAS.)<HEALPNtlLBA0.001-0.001-0.03'I-0.056-0.052-0.039-0.0360.0280.0150.0150.001-0.0'I2-0.063-0.053-0.051-0'120.0'120F0050.0230.0230.0320.028-0.029-0.03I.0.059-0.026-0.027.0.0120.0120.005-0.001Oo0060.0360.0320.0'I50.027-0.037-0.015-0.01'I0.0090'110.0'll0.006-O.OIH50.0020.0050.0'l80.0160.0580.06'I0.0'I'I-0'160.0360.0510.0350.011-0.011-0.013-0'266-0.00'I-0,006-0.0190.0250.0270.0690.0700.0390.0'l90.0570.065-0.017-0.021-0.026-0.0287-0.003-0.027-0.028O.OOV0.0510.0530.0750.0670.0600.06'I0.029-0.0020.006-0'250.031-0.0'12-0.057-0.063.0.0320.0070.0700.0650.0690.0650.0690'16-0.030-0.0'I'I-0.031-0+0'l9-0.037-0.0'l9-0.056-0.0190.0'l30'.0'l60.0580.0'l90.0520.057O.OVO0.001-0'12-0'V6-0'6V10-0.037-0,035-0'270.0'I20.0380.0'll0.0350.0350.01'I0.05'I0.0500'38-0.005-0.022-0.0'I'S~110~0200~0350~0100~0ll0~0l90~0ti0~0t2001I0~0310~0320~0690~0I30~0260~0220~02312-0,0080.0120.0220~0330.033-0.012-0.035-0.0050.0180.0270'250.0260.001130.0110.00'I0F0130.017-0.02'I-0.023-0.062-0.028-0.0280~0180.0110.010-0.0000.0180~001-0.000-0.010-0065-0.0'IB-0.038-0~016-0.009-0.00'I-0.00'LI-0.035-0.053-0.053-0.069-0.0'l3"0.0'I'I-0.010THFNEANVALUE*00033ANDTHESTANDARDDEVTATION*0.0365FORTHEABOVE193VALUESNEANOFTHEABSOLUTEVALUESI0.0307~THENAXINUNIIAGttITUDE>0.0751AT7-J.THEtlAX~NEG.>-0'686AT15-HL. 4V~ FIGUREIVa.2Unit1Cycle8DifferentialandIntegralRodWorthinOverlapI++--))350016.0IC300014'L4012.0'EOoi,i,l~250010'"020008.0-:006.0.i-1SOO"910004.02.0-500i,Li:0.0400120160200'CBBA,:K::L-;iI:4080120160200T1%I,i&f~lZl";,IStepsWithdrawnCBB120160200408CBC012O0160200228CBD .;.4000380036004V'IGUREXVa.'-NyB%--'XXReactivityInserted44Rvs~BoronConcentrationUnit.134003200gg..30002800RNfrfRINK<<j%R'~<<N4f+f.B!:+4.g"g4~Z!TH+2600'4)jI<<MA=I!f~'aeLt<<"li)p!gg't4'I2400tgt~+'XtIra~I1LL<<+4+A~MeasuredSlope=-9.13220020001800I<<Lj!<<:ph<<+,~pPjN1'"Hh~~NVNkN.%+ŽNSNR4P-XI~Itler$14'I<<Ifta~~4~II-P'ref~~\f4~~i41III~~~r<<SZre<<tHW1(~I1~IH:!i-Rj,'600~QF@Ti~X+~+t~rfrra~-1~e+~IPl.4HX'.14001200~X>jR~tre+~r>>1It4<<I4-~~4.~~4+fr~I~~~-I-tr<<earL~rf1<<fl.<<4<<f4%>>44~!<<I--<<t-tj~<<<<4<<<<K'.7<<!~4Design:4Slope=-9.22~~'~ItIePIt.m4<<<<<<IpfI-~~<<telIIPI~44>>eIa-IIl-flIf-I4-1~f<<~.Ii<<4~-4'L.e>>rtfarlh>>~~4~+r4<<444.<<>>rpPH~<<pg+4N),0(61000800f4f<<Ilasoo400lf~Ittr~~1~~*~~P'It.~+I~~~ffeas~p4~I~I~Ie-!.-~Ie~I~~e~~'I~4a-.~~I~fl~teaea1~I~~~:~I=e1II~r~~~~4~IIfeet.a'~*~~>>I~~4~~'Ile+41>>1~~III~I!~~I414th~~~1f~~~~~IIef4~~~~a-~~t~>>~'~~~tI~I<<'1~~~4~1tl~~II~~'4~~~'I~eerf<<IIa~~4I~~~~4~~"'tI~~I~eeII-'I1<<~~I~~~4l~4~I~~~-~4~~1aI4~l<<>>4~411~I~-t>>-I.1<<e~l~~~~*4~.-11~,ee~4.Pe4~'peI.*~~~~~a<<<<t44~~I~~le~II>>a.44-~~~Pt<<44-4Pt~~~e<<H~I~.t4-fI~<<~ae~~II~II'Ie4~a~I~~t+e+4LILNIP~~~<<~"I~I~~~I<<l-a~~~~ar~ta~1~I~~~~~I~~~Ifarl~1~~heII'I~~I~~~~~1~~tI~~4~"tt~.~-r~rr~4~~>>14~~~4~'IPi~I~~if4<<!I!I-lPjVpl!I<<I4t~jj!'j)4lrfI~N.i.-:ijj*teal.!i!!~ltl!ILI200iNRh~I<<f~~~ftf~t1~~a~~Ire$~4<<~1ii~~4~ee~~l=t!;I,'.~f~4~~~~IaI~I~I~rr~4~~ea'~te44~e't'IeI~4~+I<<t~1pe4rrpee~fIr<<'~!'I-'IWrfr!-r!4--.f~~t-'~Ite~I~jf~f+~f<<I4~I!t~-!-4~4~~<<4Iel~41+~+rf44~f'.Lef4e.~tffl~1~10100et'~t<<1~~el~~1~4~~~<<IP~iL4-I~~tf1~~t4r<<I'<<tL,,I4!I&eI~I0110012001300140015001600BoronConcentration(oom)1700, FIGUREIVa.3GR10STRhPSD.C.CookUnit1Cycle8DifferentialandIntegralRodNorthofD-Bank,HZP.BOC37.778.8120.5162.4204.312001100]010009CL0E8CL0-o60584390080070006005004oo300200100aoaoooooooooooooooaoaoamPJP7WlA(DWKlCDa~M07WlnlDWCOCOo~OJCUPJD-BankStepsNithdrawn V~hwre FIGUREIVa.4D.C.CookUnit1Cycle8DifferentialandIntegralRodWorthofC-Bank.HZP.BOCGRIDSTRhPS37.77e.eI20.5162.4204.3800700600ED5L0050000400300"O2001000ooooooooooooooooooooooocoMcowlAQ3MG)0)n~MolwlAcoMcDolo~cUcU(U(VNNC-BankStepsWithdrawn ~T FIGUREIVa.5D.C.CookUnit1Cycle8OifferentialandIntegralRodNorthofB-Bank,HZP.BOCGR10STRAPS37.778.6120.5]62.4204.3700600ECLE0CL40'U0lY30r882Cl5000400300"100oaaoaaooooooooooooooooocoRp)<ss>(0cDo~NFirt'(0>coso~(UNPJNPJB-BankStepsWithdrawn 4FlGUREIVa.-6D.C.CookUnit1Cycle8DifferentialandIntegralRodNorthofA-Bank.HZP.BOCGRl0STRhPS37.7l20.5]62.4204.3120011001010009CLCL8EL0605L839008007000600500400e;30020010000DD00000000000000PJmMlA(0MCDCD0~CUm~lAU300003COOPJOQCOCV(UMA-BankSteps'Nithdrawn 'aiY .IVbLowLeakaeLoadinPattern(LP)3ThecoredesignforUnit1Cycle8ischaracterizedasalowleakagedesign.BycomparingtheUnit1Cycle7andUnit1Cycle8designmanualcoreloadingdiagrams,thedifferencebecomesapparent.-ThecoreperipherylocationsinCycle7werecomposedentirelyoffreshassemblies.Incontrast,theCycle8coredesignincludesonceandtwiceburnedfuelloadedintoperipherylocations.Acomparisonofthetwo(2)loadingpatternscanbeseeninFiguresIVb.laandIVb.lb.Theeffectofloadinglower"worth"fuelintothecoreperipheryistocausetheselocationstorunatalowerpowerascomparedtothepreviouscycle.ThisisillustratedquitewellinFigureIVb.2(seeattachments).Thisfigurewasobtained'irectlyfrompowerdistributionmapsfromthecycledesignmanuals.Thevalueslistedrepresentrelativeassemblypowers.Avalueof1.00indicatesanassemblyproducingapowerequaltotheaverageassemblypower.Itfollowsthatavaluelessthan1.00isalowpowerassemblyandavaluegreaterthan1.00ahighpowerassembly.ItcanbeseenfromFigureIVb.2thatforthesamepowerleveltheperipheryassembliesforCycle8areproducingsignificantlylesspowerthanthesamelocationsinCycle7.InFigureIVb.3acomparisoncanbeseenofactualmeasured,powerdistributionsfor90%RTPconditionswithburnupsof152-and168-fortheU1C7andU1C8coresres-MWDMWDMTUMTUpectively.ThefigurewasobtainedfromafluxmapoutputmapofthenuclearenthalpyrisehotchannelfactorF>H.ByNdefinition,F~representsessentiallytheidenticalquantityasNthecomputergeneratedrelativeassemblypowersshowninFigureIVbAcomparisonofFiguresIVb.2andIVb.3showexcellentagreement.~2~Anassemblyproducinglesspowerisundergoingfewerfissionspersecondand,therefore,producingfewerneutronspersecond.'asedontheneutrondiffusionlength,peripheralassembliescanbeshowntobethesignificantcontributorstoneutronleakagefluxfromthecore.Basedonthecorepowerdistributionmapsandthetwo(2)importantstatementsaboveit,becomesapparentthatatthesamepowerleveltheCycle7corehadamuchgreaterleakagefluxthantheCycle8core.Sinceallnuclearinstrumentationprotectivefunctionssuppliedbytheexcoreinstrumentsrelyontheleakageflux,itwasimportanttoconsiderthelowleakagecoredesigneffectsontheexcoredetectors.'fparticularconcernwasobtainingamethodtogenerateexcoredetectorcalibrationfactorsforinitialstartup.Workonthisproblemwaspursuedindepend-entlyatD.C.Cook,AEPSCandWestinghouse.IVb-1 Alloftheapproacheswerequitesimilar,usinganequationofthegeneralform:I8I7xNk3.=1Ni=1p3.8c78/7p3.7I8=CalculatedCycle8current,at0.0-oA.O.I7=Cycle7currentfromlastIn/Exat0.0$A.O.3.k=AssemblyiweightingfactorP8=AssemblyiCycle8power3.P=AssemblyiCycle7powerR8/7=WeightingratioThisequationessentiallyrepresentsaratioofintegratedcornerpowerwhichwillconsequentlyrepresentaratioofleakagefluxes.TheapproachactuallyusedfortheprobleminvolvedusingEOCUlC7excorecurrentsgeneratedbythelastIncore/Excorecalibrationandanappliedweightedratio.Com-paringtheresultsoftheirindependentstudies,D.C.Cook,AEPSCandWestinghouseagreedto'alsoapplyageometric,weight-ingfactor(k)basedonthenumberofexposedfaces.Assem-blieswithtwo(2)exposedfaceswereassignedavalueof1,one(1)exposedfaceavalueof1/3,and0exposedfacesavalueof1/6.ThesevalueswerethenmultipliedbytheappropriatecomputergeneratedrelativeassemblypowerforBOC8andbymeasuredpowerdistributionforEOC7.ThentakingtheratioBOCSofthesevalues(-)theweightingratiowasfoundtobe0.5645.EOC7Alsoofconcernforinitialstartupwastheeffectofthelowleakagecoredesignontripsetpoints.Theinitialcali-brationfactorobtainedfromtheanalysispreviouslydiscussedensuredconservativeoperationofpowerrange(PR)excoredetectorswithrespect-totripsetpoints.Toensureconservatismofthepowerrangetripsetpointduetouncertaintyoftheinitialcali-bration,thePRtripwassetat80%RTPuntilafterthe50%IV.b-2 Incore/Excorecalibration.Thenormalsetpoint.is109%RTBasedontheexpectedpowerdistributiononthe0and180flats,theIntermediateRange(IR)tripsetpointswerenotexpectedtobeaffectedsignificantlybythelowleakagecoredesign.TomonitortheaffectontheIRdetectors,step8.20wasaddedto**12THP6040PER.359,ZeroPowerandAscens'ionTesting.ThissteprequiredIRdetectorcurrentreadingstakenatvarioushTpowerlevels.TheIRcurrentwasplottedversushTpowertoensureourIRtripsetpointof255RTP(30%maximumallowed)wasnotviolated.FigureIVb.4isthedatathatwastakenduringpowerascension.IVb-3 1Q+ RPIIIIFIGUREIVb.laUnit1Cycle7CoreLoadingDiagramRl11CX411CfC0C8hFIGUREIVb:.1bUnitlCycle8CoreLoadingDiagramff~1804X~X:.".-CX456X91CXXX~ilyfhlV'01213+h>>lCil1iZ.i)1RCPICCh>>.SRS>>C$1CII)PCPIChCHCPICC1~QRc91on9-J2.903RC5RDC8OcRc5jon8HEnrchn>>290515~-Region10R-RRC5'o:1108K3.33>>6 FIGUREIV'b-2ComparisionofpredictedRelativepowerDistribution.916.911.0851.11.975.941.541.08.8841.10.8251.12.8800.97.9081.086.9771.11941.0021.2201.131.201.2161.0251.20.961.1591.2040.951.131-0911.2251.141.09.8830.941.1111.221.217.9041.231.16.929.8441.1561.081.162.951.2041.131.022.971.2001.23.9521.1331.05.885.8251.101.121.14.941.2241.1101.091.221.197.9511.221.15.949.8881.161.15.8891.0251.15.71.911.620.58.281.091.8831.132.6461.05.40.911.58.620~28.880.9080.971.051.217,9291.231.01.904.8441.16.951.051.01.95.40U1C7HFP150MWDMTUU1C8HFP100-MNDMTU*AssembliesconsideredtoaffectexcorePRdetectors ,.FXGUREIVb.3ComparisonofMeasuredRelativePowerDistribution.8401.0S1.8871.0731.048*1.0331.0731.084-9941.222.9201.1821.1931.1801.068.934.9991.194.9161.0681.2291.1861.182.9301.0221.179.9441.1291.1791.0451.129.943.9251.1241.1601.1641.2551.0791.2391.188.828.8831.170.999.901.175.9501.2611.125.8991.2491.157.9781.1181.1521.057.8501.081,.8791.036.796.956.626.398.9221.1651.1271.155.824.9011.182.950.8861.1751-0061.261.850.8791.0811.0301.2591.2451.0791.1881-127.980l.'2491.152.9011.1201.1511.057.796.626.956.396.9781.129.9051.140.876.577.904.8711.140.5781.007.603.712.277.604.277U1C7Map51190%RTP;152MWDNTUF,>measuredU1CBMapg890%RTP;168MWDMTUFHmeasuredN ~~00~'0a'IIA1~~0~~~I~0 IVcIPlotShaesforUnit1le8DuetoconstraintsimposedbyRCCAandBPRAlocationsintheUnit1Cycle8coredesign,therewereonlyafewlocationsinwhichsecondaryneutronsourcescouldbeplaced.Itcanbeseenfromthecoreloadingpatternsinthefuelshuffleportionofthisreportthatthesourceswentfromalocationtwoassembliesinfromthecoreedgeat,H3andH15tothecoreperipherylocations(F15andKl)intheCycle7toCycle8~,transition.Thismovementputthesecondarysourcesclosertothesourcerange(SR)nuclearinstrumentation.'heSRdetectorsareusedtomonitorsubcriticalmultiplicationduringplantshutdownandapproachestocriticality.WhenthesourcesweremovedfromtheirCycle7toCycle8locationsanincreaseincountsof20to30timeswasobservedonthesourcerangeinstruments.Basedonthisinformation,anin-vestigationbyD.C.CookNuclearEngineeringpersonnelwas,initiatedtostudytheeffectsofthissourcerangeplacementonICRR(1/M)plotsusedduringapproachestocriticality.AnICRRplotissimplytheICRR(initialcountscounts)plottedversusanyparameterthatincreaseskftowardcriticality.SomeexamplesofICRRplotsaregiveninFigureIVc.l.Theplotisconsideredconservativeifitunderpredictscriticalityandnon-conservativeifitoverpredietscriticalconditions.Inasituationwherethesourcerangedetectorisdominatedbyartificialsourceneutrons,anon-conservativeshapecanbeexpected.ThesecondaryneutronsourcedominatestheSRdetectorandthedetectorcannotdetectchangesincoreneutronpopulationaccurately.Thisissometimesreferredtoassourceshine.ThesourcesinUnit1Cycle8aresituatedinsuchafashion.AsimplerelationshipwasestablishedtocalculatetheICRRvaluesfordifferentvaluesofbaselinecounts.ThemodelwasbasedondatafromUnit1Cycle7initialcriticality.ThefollowingequationwasusedtogeneratepredictedcurveshapesforUlC8initialapproachtocriticality:AC0ICRR=AC+M0A=ConstantwhichtheUlC7baselineismultipliedby(ex.10x,20x,etc.).C=UlC7baselinecountsM=U1C7multiplicationatsomedilutionlevel.(counts-baseline)Basedonthisanalysis,theexpectedcurveshapeswerequitenon-conservative.Tocompensateforthisexpectedeffect,two(2)cutsindilutionratewereaddedto**12THP6040PER.357togiveoperatorsaslowerapproachtocriticality.InanticipationIVc-1 offuturestartupsfollowinggianttrip,anewsourcerangede-tectorN-33awasinstalled90fromthecurrentdetectorlocations.ItisimportanttonotethatwhencriticalityisclosethecountsonN33awillbeapproximatelyequaltoChannelsN31andN32.FiguresIVc.2andIVc.3representactualdatatakenfrom(N31orN32)andN33arespectively.,IVc-2 FIGUREIVc.l,ICRRPlotShapesICRRNon-conservativeIdealConservative1DecreasingBoronConcentration FlGUREXVc.21.0~$~UNITICYCLE8ICRRvs.BORONCONCENTRATION~97;!I.6-3.222002100200019001800BORONCONCENTRATION(PPm)1700160)5001523CDD8190Steps ~~Ilg4' FIGURE1.0SPARESOURCERAIICE(XnfolnntionOn)V)UNIT1CYCLE8ICRRvs.PRIHARYWATER(thousandsofgallons)It)Il:Itii.6.atati'tihattfl)s)}i)iti).3~2St0cdI'iionu'tat17I510galsL4I*$18101c14161319.7/20DDTMhDYWhtt$DDlihwtenntlttItfntt1lnntt12222.92428 IVdProblemsAssociatedwithFluxMainSstemOnOctober18,1983,duringZeroPowerPhysicsTesting,thefluxmappingsystemleakdetectionalarmbegantoalarminter-mittently.An,EmergencyJobOrderwaswrittentoinvestigatewhethertherewasaleakingthimbleoramalfunctioninthealarmsystem.Uponenteringthesealtablearea,waterwasobservedflowingfromdetectorC'sten-pathrotary,transferdevice(seeFiguresIVd.landIVd.2).Thetechniciansinvestigatingthesitua-tionconductedatemperaturedeterminationontheguidetubesrunningfromdetectorC'sten-pathrotarytransferdevicetotheisola-tionvalvesand.foundthimbleJ-1tobeleaking(seeFigureIVd.3).TheJ-1isolationvalvewassubsequentlyclosedandthewaterflowceased.Aninspectionoftheten-pathrotarytransferdevicesasso-ciatedwiththeotherfive(5)detectorswasconductedonOcto-ber19,1983,todetermineifboratedwaterhad"backedup"thoseten-pathrotarytransferdevicedrains.Allsix(6)ten-pathrotarytransferdevicedrainsareconnectedtoacommonlinewhichcontainstheleakdetector.Waterwasfoundinthree(3)ofthefive(5)ten-pathrotarytransferdevices.Asthepotentialexistedforwatertohavegottenintotheboreofthethimblesassociatedwiththeseten-pathrotarytransferdevices,andthedetectorCten-pathrotarytransferdevice,NUSCorporationwascontractedtodewaterandair-drythesethimblesasaninterimstepuntiltheycouldbeproperlycleaned.OnOctober26and27,1983,betweenfluxmapsofthePowerAscension50%Incore/ExcoreCalibration,NUSCorporationdewateredandair-driedthethimblesassociatedwiththefour(4)ten-pathrotarytransferdeviceswhichcontainedwater.Onlythenine(9)thimblesofC'sten-pathrotarytransferdevicehadwaterwithintheirthimblebore.Nowaterwasdischargedfromthethimblesassociatedwiththethree(3)otherten-pathrotarytransferdevices.Duringthedewateringandair-drying,onOctober27,1983,aproblemarosewiththimbleH-3(seeFigureIVd.3).Duringthedewatering/air-dryingprocesstheisolationvalvesofthesuspectthimblesweredisconnectedfromtheguidetubeframeassembly(seeFigureIVd.2).WhenH-3'sisolationvalvewasdisconnected,thereactorcoolantsystempressureforcedthethimbleapproxi-matleyfourandone-half(4.5)inchesoutofthecorethroughthesealtablemiddlehighpressureseal(seeFigureIVd.4).Theiso-lationvalvewassecuredtotheguidetubeframeassemblyviaropeandthedewatering/air-dryingoftheremainingthimbleswascompleted.
H-3'sisolationvalveremainedtiedtotheguidetubeframeassemblyuntilNovember30,1983.PriortothecleaningoftheUnit'sthimblesbyNUSCorporation,plantpersonnelreseatedtheH-3thimbleandtightenedthemiddlehighpressureseal.ThimblecleaningwascompletedonDecember1,1983.Ivd-2
0~Il-s~II-44I~I~8~g~laQeQaQa<,<ii:"i'i~rrl1r~0~sg~~)l' To5PathRotaryTransferDevices-10PathRotaryTrasferDevicesGuideTubeFrameAssembly~///i//GuideTubessolationUalvesI]-HighPressureSealsSealTableFIGUREIVd.2SEALTABLEAREA V ~~0)~~~~~S~~SLSl~~SLSl'1~jLgLSL1r~L'P4~'llSL1r~L~rAhALrr~L~r~~~1'Ir~L~rSl~rS'L~rIL~~~Lr~IL'Ir~aSL'IrjLSl'I~S~~l1rSL~rSL1~SL1~SL1r~L1r~l~1~lrSL1rILrr4L'1FSL~L~rS~SL'1~SLlrS~~~~I~~a~~~~~~)~~S~~~'~~I~~~oI~1 eq 5/16in.FlareFittingUnionConnectorHexBody(5/16"flarex5/16")UpperSeal(5/16")9IChDistancebetweenthesecompression-CompressionHutnutswasapproxi-(5/16")mately4.5inches.LowerSeal(5/8"or3/4")'hrinkTubingMiddleSeal(5/16")ReducingUnionHexBody(5/16"x5/8")or(5/16"x3/4")CompressionHut'(5/8"or3/4")SealthroughwhichThimblewasforcedbyRCSPressure.Thimble(0.301"O.D-X0.201"I-D.)Conduit(5/8"or3/4")OPERATIONALPOSITIONFIGUREIVd.4SEALTABLEHIGHPRESSURESEAL VaPOWERASCENSIONTESTINGTheUnit1,Cycle8powerascensiontestingcommencedat1221hoursonOctober24,1983,and,wascompletedat1021hoursonNovember8,1983.FigureVa.ldisplaysthepowerascensiontestingprogramasafunctionoftime.Thepowerascensiontestingconsistedofthefollowing:1)Corepowerdistributionmeasurements2)Incore/excoredetectorcrosscalibration3)MTC,DPC,AT/hPtestingFluxmapswereobtainedatvariouspowerlevelsinthecourseofpowerascension.Mapsweretakenatapproximately30%,48%,68%,89%,95%and100%RTP.ThepowerdistributionswerecalculatedbytheDETECTORcode,usingdataobtainedwiththeincoremoveabledetectorsystemandanalyticalfactorssuppliedbyWestinghouse.Forallofthefluxmaps,thepowerdistributionmeasurementswereincompliancewithTechnicalSpecificationlimits.AsummaryofthepeakingfactorsatthementionedpowerlevelsisgiveninTableVa.l.At30%RTP,afluxmapwastakenwithcontrolbankDpositionedatthe100%RTPRodInsertionLimit(182stepsonCBD).ThefluxmapwastakenwiththisconfigurationtoverifythattheRodInsertionLimitsneednotberevised.ResultsofthismaparegiveninTableVa.l.At48%RTP,four(4)fullcorefluxmaps,108-03,04,05,and06,wereobtainedwithaxialoffsetsrangingfrom-26.88%to21.30%.Thereduceddataofthefour(4)fluxmapswasusedfortheincore/excoredetectorcrosscalibration.FiguresVa.2throughVa.5givetheexcorecurrentvs.theincoreaxialoffsetforchannelsN-41throughN-44FigureVa.6showstheincoreaxialoffset,vs.theexcoreaxialoffsetforchannelsN-41throughN-44.TableVa.2givesthecalculateddetectorupperandlowercurrents,atselectedincoreaxialoffsets,usingtheleastsquarefitprogram.AfterCGIcalibratedtheNIS,makinguseofthereduceddata,powerwasraisedtoapproximately68%RTP.Powerwasheldconstantfor24hourstoconditionthefuelandtoobtainafluxmap.Afterthe24hourhold,theMTC,DPC,andhT/LPtestswereconducted.TheMTCandDPCtestswereperformedbycontrolrodsubstitution.FortheMTC,controlbankD,CBD,wasinsertedorwithdrawnwhileholdingpowerconstant'hichresultedinatemperaturechange.IntheDPCtest,thetemperaturewasheldconstantforCBDinsertionorwith-drawalwhichresultedinapowerchange.ThechangesintemperatureandpoweralongwiththereactivitychangeduetorodinsertionorwithdrawalwereusedtocalculatetheMTCandDPC.The~T/~Ptestwasperformedbyincreasingordecreasingturbineloadtoacquireatemperatureandpowerchangesimultaneously.TableVa.3givesasummaryoftheMTC,DPCandhT/hPtestsresults. TheMTCtestwasperformedtoassureanegativemoderator'emperaturecoefficientexistswhenpowerisraisedabove70%RTP.TheDopplerPowerCoefficienttestwasperformedtocomparemeasureddata,tothedesign.hTThePtestwasperformedtocheckdata.consistency.Bycomparingthemeasured-tothemeasured(--)andthemeasuredhTMTCQPDPC(gp)tothemeasured(--),acheckonthere1iabi1ityofthehT'PCmeasurementscanbemade.TheETCisderivedfromthemeasuredMTC.SeeTableVa.3.DuetotheintroductionoftheWABA'sinCycle8,theAmericanElectricPowerServiceCorporation,AEPSC,deteminedthattheuseofthree-dimensional,3-D,theoreticalfactorswasnecessaryforprovidingabetterestimateofthemeasuredlocalheat,fluxfactorsPriortopowerascension,plantpersonnelandAEPSCpersonneldetectederrorsintheWestinghousegenerated3-Dtheoreticalfactors.Con-sequently,the89%RTPfluxmapwasanalyzedusingtheconventionalWestinghousegeneratedtwo-dimensional,2-D,theoreticalfactors.AsrecommendedbyWestinghouse,thefollowingpenaltieswereappliedtotheheatfluxhotchannelfactors,F,TechnicalSpecification0'imitswhenusingthe2-Dtheoreticalfactorsduringpowerascension:2)3)15%reductioninthePlimitforthetopandbottomten,10,percent.ofthecore,2%reductionforthenext10%,and1%reductionforthecentersixty,60,percentofthecore.TheAllowablePowerLevel,APL,ofthe89%RTPfluxmapwassufficienttoallowpowerascensionto95%RTP.OnNovember4,1983,Westinghouseprovidedaset,ofcorrected3-Dtheoreticalfactors.Afterathoroughreviewofthe3-Dtheoreticalfactors,byAEPSC,the89%RTPand95tRTPfluxmapswerereprocessedusingthecorrected3-Dtheoreticalfactors.TheAPLofthe89%RTPand95%RTPfluxmaps,whenusingthecorrected3-Dtheoreticalfactors,wassuffi-cientlyhighenoughtoallowpowerascensionto100%RTP.Promanincorepowerdistributionstandpoint,powerascensionwentwell,withlittletimelostduetoAPL(AllowablePowerLevel)restrictions.Va-2 PowerAscensionTestingTableVa.lUnit1Cycle8COREPOWERDISTRIBUTION~Ma108.02108-03108-07108-08108-08108-09108-10Power(%)304868898995100A.O.(0)-5.983-3.4551.719-2.262-2.292-1.428-2.568FPenalized02.1483~1.96111.79501.80061-76561.72631-7238FLQ3.94003.93012.85562.19642.21842.08381.9726APL(%)480.988.295.596.399.2101.1102.3hH1.51461.44551.41961.39441.36391.36871.3612.FLhH1.80331.72361.63481.54011.54011.51441.4906Penalized=MeasuredValuex1.05x1.03L=TechnicalSpecificationLimitAPL=AllowablePowerLevel1=2DFactorsfor50%,BOL2=2DFactorsforHFP,penalizedK(Z)3=3DFactors4=APLcalculatedfor+5%TargetBand5=FCFM108-02wasobtainedatthe100%RodInsertionLimit C~~TableVa.2Unit1Cycle.8.INCOREANDEXCOREDET.CAL10/26/83-10/27/83BASEDONMAPS10803,04,05and06DETECTORCURRENTSINpAMPSCALCULATEDFROMTHELEASTSQUAREFITIncoreAxialOffsetsUPPERCURRENTSFORDETECTOR41-30.069.5917-20.0-10.00.010.020.0.30.074.826880.061985.297090.532295.7673101.0024UPPERCURRENTSFORDETECTOR4291.022398.3774105.7325113.0877120.4428127.7979LOWERCURRENTSFORDETECTOR42133.3245125.3725117.4205109.4685101..516593.5645LOWERCURRENTSFORDETECTOR41113.9109106.679299.447492.215784.983977.752270.5205135.153185.6125UPPERCURRENTSFORDETECTOR4394.2801.101.7934109.3067116.8201LOWERCURRENTSFORDETECTOR43133.9680125.8832117.7983109.7135124.3335101.628693.543885.4590131.8468139.3602UPPERCURRENTSFORDETECTOR4485.072992.010698.9483105.8860112.8237119.7613126.6990LOWERCURRENTSFORDETECTOR44130.8142122.9700115.1258107.281699.437491.593183.74 TableVa.3SummaryofMTC,DopplerCoefficientandhT/hPTest.Dataat<70%RTPUnit1Cycle8MTC(pcm/'F)DPC(pcm/%)R(F/8)Rc5(oF/%)-1.14-10.33-8.42-4.73-2.64-10.88-4.49-2.52-l.67-6.24-3.50-2.59-2.01-10.61-6.38-3.58Desicen-2.961-ll.251-5.282-3.002Deviation3-0.95-0.641.100.58NOTES:1~Valueswerecalculatedfromthevendor'sdesignreport,AROcondition2Valueswerecalculatedusingavailablemeasuredtestresults(i.e.,MTC,DPC,etc.)3Deviation=Designvalue-Measureddata4RhTDPC(DolerPowerCoefficienthPMTCModeratorTemp.Coefficient5R,hT'PCDolerPowerCoefficienthPETCIsothermalTemp.CoefficientITC=MTC+DPC=-3.54pcm/'FDPC=-1.53pcm/'F ~~FIGUREVa.1Unit1Cycle8PowerAscensionvs.Time100907060500OldI-LdA000LoL00Ld.CLaddCQ00LOO'dCLdEI~~.CaCI'UM'UILwlA0OII-Mi0Itl&IOiwlCOCII0)OL00vrCaoL00ItldEaIIILOIIIIIIIIIIIIIIICCnQQw~colII,47,4JLl,L0'~'dUC0000DOA00L0LOlJ3'0EUCwKcaoLCPPDPQ~IOCwawood~ao~oc~L0CwocaC<LOZ0Q00OAOV)0IwX0~J3M~QJDNUwoV)8DB0CIOQWIdCO0fOL0XawcaoUloI'tlVIdI-0ao4~UQCIoIIIIIIIIIC).ClIIXIOCAaNaUldLpDlC0OlClICOCIIII0O0La.D04CL0dC0M0LnO.IlldOldC~0D0x0AILI0LdEp0LIC0ILOIC)CI100ICIIIIIIIIIIEJ:0D0IIIIE'ILlII02021222324,25262728293031,12345678October1983November1983 ~A -FIGUREVa.2ExcoroCurrentvsZncoreA.O".N41~)~~~~~~~~tijijIt~~IHiP.!i)~etItejIf'lij(jlj:.IHl(I'.HiH}I'.ieetiie'<(!I"i!le>1)0i)tUpperExcoreCurrentQLleLoweIrExcoreCurretQ7'Ifl..H!H)!H.'HH(iil~'I-~150flallj!H~I~'I~I!10II!i)1j(i!H!Hfjj!!i~eeIl:i)HifljHitefHi!Ii'li!ItI!:;i(~II'li!!fliliiiiililiiltiiiiii:('HHf'f)(~Hi0~0!It~I!H)!\f~~tj';i.::i:I!140tt~~~le,101!>lI)!iiiiiH!i!fiiil(~0)0>/e11!iiHi)HHlI~~!0.jfQJitilij!i!iLe!)l)jif!0if)!HHif)0~elIe~Hl~~~~!0)'"FF:~1~tI~ll)I)0If~1~~0fan0~11l)t000!LL:'~t!~~~'iii~~~I~~~~!I!10ejj~~!!iHt..'l~0t'Uti'I'j!!!~~~ej!t~~(~~~~~~>0~~~lfs~0~:1)00~>(~120i'I!~'('tff'~'st!Ij0(~I.!I~~Ul~0'1tt~i'!.f0(!~~0::tjj.!0~~I~0++!iii++'++)\~I~r)()00!HHisc0l4Hlti(~0I\~~~'1!ls>(~~110O00oX100j!:j!;tI!ii!H!.it)le~)1~~I~~i~e>l!!'IIe~~0~~Hf~I>1st"'!I.Hfi!IIllHijl.'l!Hi)H!HI~~r~~>~~I1~~ii)i!ii)!~et~I~~I~(0~0>~~I~~~<<j~~~0'>1lti!~IIa!i)>I~~!190r:=::j=I~~I~~~~I~~~1e'tje!el!~~!iiei~>!I~'i!ii!ili"~I~~TT.i!I~isttit!;f:~le>~'00iiH!!i!!fH~al~i~80!jtl(j'0.tt)t!j!I(~~000I!ate~~~~I~0~0'liH~~!!I~~::.I~0I-~HiiH!HH)0i~1~~)11;100f!!Hj:I!!IlHl!jI070:s::l7~itili>l'.!!iHiff!Hiff1I~~f~"!ttt~0~I10~~0)0iii~I~I~~~II~iH'lf-'.:ihi,'H!I!ijjjeljH'ate~~ate0~0~I~ili0~1~~~0~>I~I~~~~Iel60-20-100IncoreAxialOffset(".I-30C~~~~i!!)~~Iltete:ill~~l~~~(I'.It:~~'~t~1~~01~1~0!~~~~!tf~>!iI>>0(0I1~1I~~~~0liejHi'itlrejti;I',t::>I)re~01~~;!I!>I~ifiiif'i!';ii1!II~~1~1!i!H!!ii)!!!ffiiiili!i"lii01\\~I~0~~~~(01>.Hli!~~~~~!)0!1'(ies)~~i~~)!!:IjgQjte:I(~~~ICf~ft~~~~~1;~0~0\~ee~110V!r!(~!~~f~I('1~it~~~))H:.)!I:~~\~~~(iiiliH!:!~0~'>~~1~~(!jitjIHI.'I'(i~~iI'!!?ji'lli:.!ij)~~Hi"I!Iiii!~0~~I~I~a!i10++~~e~~0~~~>(s~~>l~~0~~~ie~fan++~!++t~~0~I~!ets~(~~~~~~~~~\~1*I0~~~~~I\~II0~er~~~ai)~~0~0~u\1~II~00I0~eri~~"!0~=-~~~t~~0fo'rei;I!!i:::I0"\0~~tltei20~0"~0'0*P.0~~~~~Unit1Cycle8001~0e-0'~30 150140130120110Oo010090'07060N-42ai'I".4!:jaj-~I:4!I4~~~~I:::'..:UpperExcoreCurrentO!$!jt-LowerExco.'HreCurrent5,..!,)I~~tta;!!.:;:.i)i!!iil~11a}::~\~~~I~-H!Hi)HIil++HlHt)"~i-.).Hi::;;1hiif.4~iI~111*Itti!!iiliHl!)$44~H!"4~\~4~~I~\~4~~~1~II~I::1:$:i)'HI*-)144Hj.::."~~~)I,"~~~\~4~~~t$>!j!t'4!i)++a~~I~44~~'4~>>4'.I:++I:II:Ilal~IHi!'f!Hi!fii'!!:!t~44~~ifl'4~~~~.':.'l!jt)f!!Ij!"ji)i4~I1jl~))1!4jjlIji4>!~~~4-20FIGUREVa.3ExcoreCurrentvsIncoreA.O.jiiHifl~4Hlij~Bl1.$HlIiiliifiiHlHt)HHii!liiiiff!IIi)~H1'JAKEjHH!jrlahtT)$ifffiif.Iii!iliHfiilHl'iI>l'HH',HiHlliliHji.jjjHiI.flIPi'Iif'!ijLH~~4l)litit~~Hii!"!Hi!IHl~1~I>4)Hf!iifiIiH!HHIHl!Hi!iHliHHIHiHiii!!HfilHiHi}jHiiHHiilif!jH!!HHiiH)IHjl"fi!~~~41~~~HHHi$)t~~~I~l~)tt.j)HH!f'fH!HfIHjfiH!!fil!H!H!H!Hi!H~)~,:t.lH~)T),!I:N'>>fji!it))Hifi)fB!H!HIIlf!iHHH))$HiHI~~~~44)1)i~~!f.!I!)!Itj',}t>141:1~)~tt~~'I!I!HiiiHi~))loI<<lo~~4!1~iii!~'..I!'!'.!IfiiigiHi):j)'jfII))I!~~~,!~$1a':ltl!I~t~I~1~!iiillH!:.',)Iifi'i!H$)'ttHit)~~~~)II~I~~~I~HlH!~~~tliHi$1!~~:IIVI!Hat~~>4!41!~'J~~tj!;IfI!41~4$)H1$;t~~~~!'-'HiHiHiH~Tt>4!-)4)il!~>tatI4~4I~~:ll~~II~I41$I;>>~~!)I>~4~~I~ioo444iHHlHiHitiTI!~1$~~~4~~~~~~~$))Hj~~~II4$1'I~at~~~~~~~I~f~~tI!41lao)I~I~~tllff!f'ti!I!II~~~>IIt~~iti>!i!tit!iJHI~~>~~~~~~~~t~II~II~4!~Iot!14~>at1)$~~jH!H}})~~l~!i!iH!~1I~!$!I~Itlt~Ito1',f')ii:HHIiH~)4)IHi4~44)HHiilialtHij!j0TncorcAxialOffsetIt)-10~rttj!ifo~iH\>~I~I~1Ii~~I)~a.'l4~~i4vo~4I~~~~iHoa~I~at!iH~F4I~Ivol~\,~~~~4~~~~~I~I!Iilt~~\4!I4~~)$1~~~4~~4ootij!ta)!H!iHHi4~Iftoii,'HHl!It~)~~~11~~!~~Hj)I)!Hi!I1aII>~~~II~4~4I~~!ii!ii'.1':I!~\~4~fHl)t~~l>~I!H~tl'itt~*~~1~4~tolit$$1attal:~~t~~1!!i:I~1la~~)5>j!110~otF4'a!'4~)~~t)~:at~~!a~~~$~~4tta~4!)I~ol~I~~I~~I~~;~I~~$L't~1~11~~tl4~Nl!~II+~~~~">~!4~~~I~~1~:~)4~4~I!)44.",!~~~~~~t~~~~I~4~if!iii$)1$!I'4~~~~~4$$I~t~~I$1,~~~44l~I4$1>4~Ii)~)'I~14at~\~4~'4~$4~4~t~~~~~~tia~~~~?li~'II~a~4~)ta~44~~~I~-~~~~~a>~~I"~Ja'aa~1~~1;$I~~~~I-~~~'~~t4!~=.~~I~~*4r.~!~I~~~'4~~=-"~~~~~~~~I'$420~4Unit1Cycle8i$:j."t'~\~4~~4~:1$:-~~I~~~4Hl-$!I4~~)~~'4"~i~.!*$$$4~Ir:-e*~!~I~*~=I-~~=30 0i O000XMN-43t:::~~~~150~120~~100i."iH:I~9080700~~60-30-.:.1.':;.:.:jgi::.ii;!j!HHjji!jjjUpperExcoreCurrents1:LowerExcorcCurrcnt.-'.:D.!I.i.4!...,..I.i:~'~0~~~~'-!ji~~~4'~~'~~e'II\!~~4IIjiH!I'H-"i":*Hj.~~~0~~!-r~I't+~I~~~~~HI-1!H'"LL"~IiHij~!~~~I~t1~~~~-204I1FIGUREVa.4:ExcoreCurrentvsIncoreA.O.H!1tl!i!>>~Htt1::~~0!~I~~~0~~tff~ttlIVeelt.'I:!HiHt4~I~~~~~~~!tftl'1,'anIattloitjfiH~~~~~~~~}PIH!Hii'fHtf:ffffI!!:i!fj!~elI~~~tl~tr~~I~~!HHt!i!iiii!i!iiHiftoHt~!lel~~Ie~~~~~~~\Ire~i1,HIHliif~~jjetttti!10~I~iH!iiii:'llI!1IHHi4~~'1~~rltf~tl:I'i0'HHt01'I11'~JjjIil!Iji}ijiiHiII!iililiIilI!~~!HHiiffefieliijj!!iliiiiif1Hli!IiH!H~~\~I~~~~H!H!Hi,'!iH}Hl1!ijil!itj~~I~I~t~1H!H!HliiiH~Ifbiti'IHflil!Iffijffi;iHIH~~H!HffliHjlijVH!!IlliiH!Hfli!H!il}HHl'lf~~1HififeH'!IHl~~~I~4!~~~Hf~I~Hi~1~'I!0~1Hi~I4tii!IljlHj"1!f1HlI~~fjeI~~ij!11~~It!Hffi!:;If'11!IHt!iiHIIHH!HlH!'f!1!iii"f~~f~IoftHlfi!-'"!I'0~~Hllij~itfHii!t~~~~~I~HHf1~4I~fj!HiHi!!IiiiiiHHi!ifijfi:jijlflf~i!II~eleiI~~!0!iiiHH!Hi~~1<<t~fttfii!H11.'"~!1fjiiiifHI14~j!elitf1!jiiiiejiffe!ififH:fjH!I~~HlHltel~~IttfHi1!fertl!~~jiifiiHl!IljHi.Hi~0iH!i!~tf~i'~4!jtH'}!!B'Ii!10!~ei~~~Htt4~t!H~~4~~~te~4~~~0~f~~~~Ji~1"'i'l'l'if!HB!.".1I~I~44~~!i!!itH;-'.r~~04~~I'!~~~~4!It!~I~IIt.!Ilt14!1!4itl\~~I~.::jliift1:!jtt~~0~~~~t~t~4lrt~0~0~~I~I~~Ij!IHi4~!I:~!~I~++!H~~t~~~~tt~~~jH!1!!liiii1!cia~~IilIteI:Ijjetfftiieeft.'1"'tti'I!i'tiH~~~41~.1~Ilt~~~I!!1~~~11~~1tH~~IH~\I~1++~~I~Hf~~~~I~~~~~!~fej!Hljf:1'tj1:!'11t.'!~'et~.HfIt!it!HjiH!i}~1~\~!~tttHi~4IHHt!!ji!1fft0~1Htitit!~It~4Hot1Ce'!'1!11!te!fiifififi!fH!11!liijii!iii!IfiitH~to~ItetIl.IH~I~I~~01~~~~~~~~100ZncoreAxialOffset(%)-10~'I\~te~~I~1.ee~~jlttjlIj!i"'1!:l.flii!ti!jttt~at~~I1!H!jji~~tjf~~~rr~~~~tet~~0!~0~~I~~~~00~t\I~~~It00~~I~~~!t~~4'tII0~Hi0~1II~~0f~~I~fref~~~I~=++10~!~~Ilje\~~1411'\~~~~~~~~~~0I~1~~'tle~~::0!.:I0~~t~20~~~f~4~!~-~~Unit1Cycle8~4~~~1~001~:~~-~~4I*-~=~=~'.:::"-'L".30 J4 44~150140.~130.-,'.I:::.'-~4~-"*120a.rl.~.it110V0440oX100:-:I.'-::.3:i:90;1}a8070::(H:::f60-30r~-3313~UpperExcoreCurrentQH;HLowerExcorCurren'IiH)li:il:!I~~3~~~II3(e1~11(let3"'Iiif!:I'.~~43I~~~t~~43~~~Itee<<~~~~t~~~I~'(~"43i'!i!Hi~~I~~~t~~I~~~lt:,1!3~I31'.:.34'i'!"tI:!33)~~++~~~4~~!1:la~~3">>~t="t1~~4++i::3.11131;::I(j?I~~~I~!(tlt\~~~H!lHieltt~I~~~4~I~~~~4~~4-20iillilHfH!i!I.HH!iiil~~lllHl!!f4l~.iliiHiH!4~'I4~1~I~~~41.3!I~II:IH!it!>r"3U3eel\~4~\~t~jt~~~~~I~er~~.3341IIogHif!)ilItFlGUREVa5.~:IExcoreCurrentvsIncoreA.O.ijii!i!Hi)i!fff))H\I'4illil4~1reHfff1I.')}fHifr!!tH~I~:H!'Il'H)HHIHrIHHlHi!ilH)ifiliHi'HtftHHIHljllHI5H!HlU)B!HiHIHIjHlH)IHl'H'HHll(IIH1)l'iiHii!HfiHfiH3)iiiii!filiffflHf!HHiHI!3fijfHHIii!I,fHliH'H)H:ltH'f'lllHiH)lI:f)H!!)h!ii!HlHIii!t~~HiIiiiHiiHi!)lH!!fi!f3illHi)H;H!:iiII~~~!tiHli)~I~IIIHilfiH!at,'.iHjlfiI~~flilH!!HiHH!tfIlft;t3!titfIHI:3tllHltt}33~4~I~~~~IHiif)1)tfti!!h!iiHlIHtttIif~(1)Hi),",,',jItl}II,oftffiI!3iHli!Ili~))(iil~1~~l~Hi"jHiH!!ii!ilI~IiHIII~iH!14HifitilihIltet~HlHiHifftIHlflett!Il';tt~~~~lhiHI!3~f~f~ilHtj.ltie:tllf~;,3I~atet~1~~~~1~~H)I~~)H)!iI~~I~3i!';Ij'.,elih~~~tllI:i!h!t)H!iH!I!)HHlHi!3333!HfH~eti!iHH!H!11t~~~h:!i!iH!Hi0!i':.!f~~~~~~~tt)HflHfHjfHiHt)'llliiH~tttt;I!1Hitt41~4!131Hfit!HIjjjiI!.IKiiiHill!)tj~fIHfltiHi~~43!I~~~~331rtliHi!HfHf~H!IIH)H)HHHf-300IneereAX!nltlffrtrt~lif~ttI~3!~~43HiHfIliHt~"~I~I~~I~~~~1~r.I'.l.l3,.~14at~~~t)e~4ii!HiIHHl4~13~H!!!lII'1~I~if!!iiffIH11~hlff'.)Hill;tllijIHIt~tllHjtiltf~etftttf~~I~i!)Hi!ff1~~~I~~~~4~~!IlHfI~~\'eetjo'..)Ief:,!i)H3)!H)(toih!ii!H~Iete!'iI!iI~~I~I~:(C3~"~131tif)Hiiiihii!91I~~H:i"tt~~'I~~4'HPi"'i.3.:":fi;3;of~ij!)H~111~~~~at.-Veiit:13I~:j!:!3!It~I~!f3~ll~Iif~~Hii!i~tl:ft!Iieif"I:,lil'll!Il!H!at~H)IHilIHft!tel4*~I~i!Iiii!!iHi)II!lillHI~~e!11tiltl!~;)ii!!Hii:IH~I~~4rt3I'.IHl103~~~~(3114~~'1\~444~113~\~I~4r~~I~\~~~\rtetoatett(I'!4I'II;Ii!iiHIf)I)I!~I~4~ft3:i!I3::."-'I:-;-:4~1I~~~f('I'I~~~~~~4~I~~~4I~1~I4~et4'~~~~~3~"~-ih~~~~4t("II~*~~I"~4~3(I;li20~I13.I~4:4(11'~~Unit1C18~1~to";Ia~tr~4.31~'I=I!.~1'1ertrI441~::!I:3:34~3I:~4~~I:.~4~*431334~-~~*I~~~4)4*~~144~~~~30 'P>AI"f FIGURE.Ua.6",50~*440*'.'Ii'02010cs040Ss00-10~-20::IP~-I-30~~=~40.-50,.-30*ilLEGEND::N410.;-N42QN43dk'44P~"si~~~~II~~~-20~4~'II~*~~I,~)ft~~~~~~~~~~t:i~to~~~~I~<<lt~4iall!i~I~~~~~~leI~~I~t~te>o4~IIsI~I4~~44~~~*I~4tHI~4~ltI~~~ItleIncoreAxialOffsetvsExcoreAxialOffsetti'fiiii<<iti~~Jjjt~il!Ii!IfQHiIH!!H)HHI'tlte.jiHH1fiifti!I!iifiiIi))HH!iiiilt,lH!)H!H'!.ffiHiHiHHji!i~~~Hili!iHiIHHji)ilft:Hr,il!H!H!IH!Iif:.HiliiitHlif!iiiH!ss~ttlt~4)Hl)jg!sfljlsi!iif!iiifl!:!iiH>~ItIetsillf4\~\Hl'iiil'~liI!tl)iI-'If)jt!IellHefej.'i!Il!'Iifi'iiHtt')!lii!iH!ii!ijiH!bI~iii!H!Htlsl)i)iflf!ff!iI!iliillilfiTl!Jtt~I~!ii'll"t~fli!HiHiH~Iiii!Hlaitfl~~~~~~~1iHililiiiiHfji!i4!Ill!4!il~4~~)~!~~4~~IIii;ttt~I4~iilii!!H!H~I~1!:te~I~~~4'++llItsI~s~I\~tt4~II~tstfI}i1!'it'Iil'HHiI}!ifiHi!Hi~4!Ii~~sit!il~~~~I!I!HIa!aHl~~~I~tt~~~'4~~~>4!H"iHi)sF;f~~~elsit~~I~~tll~~eil4a!I~~~~1iH~4'.-~~I41~~~ii,Itlie}I!iH.itJW:ot4"!i~~'I4I'loT.~t1!~!tlI~~sH'!r!IiIHf~\ti~!~~I~~i~I,~~~iH!iiI~~I~fjelf~~~t'e!ltt4~~~~I~titl~~4I~~it~~I~:::j~~~t!!alt"tpt!!iHi~~~4~I>!~itIltItt~~~~I~tI4~'IjI~~e~4it4I>~It~~*~~I~!i!\*~414~~~~~I~~~~stHifi!HI~tl'I!~:444~~~.itI"iiHli!Jii~llri~~~~I~It~~i"'"lli~I~t~!i~~4,s;tl~i~~4~I4!!~~I~~~t~ili:iltil!HI!Ifiii!H!Hi~Is~s~-~iliiH~~~~t),'~~~I4~I!II~ls>it~I~:~ii~~I~i!~!ifI4stI'!iiH}H~taI~JjH4'ttt!ilHHl~ee!H.11)Hlii!ilI:,II~..;:!iHill~~fte~~~I~~I~~il>>I~~~ftt~~I~ilii1illlijHl~4ilj-100Excorrh.O.('l.liHHii~~~~ti:~~4fl:tN~~jHI~til!etl~11t~t~!II4~t~'~~4~~it~tite!:~I~~~~~sIis!~It~IaI~ttt~4~I!1H!4~~~sI~~~I'i~elf~~I~t~!~~of!~';te~~~II~II~IHlt:tet~~I~t!Hli'et'!4104~~~~~~~~\~~~i~~tt4at!"iii't:j!ii!ii!!i)4~~~t~~>iHI!H"..i:.!i!:.!",~~t~-'1I~~I4~4~4~I*--:'-sj'.:~~I~~~~~~I4"P~Ifitttefl:~~letIjH~~~~~~!\~i~:~I~~~~IjI'Hii:tH~~:it'~I~if~Irl'4jr!4~4~~I20as44<<~Ia.'.'~'I]~II-~I~stUnit1Cycle8~"~~e~~I~~I~~*~s*!Itx'~'0 VbPlantChemisHistoTheUnit1refuelingoutagebeganonJuly16,1983.Priorto'hisrefuelingoutage,thereactorcoolantsystemactivitiesingeneral,anddoseequivalentiodine-131inparticular,werequite'ow.Doseequivalentiodine-131wasapprox.1.00x10-'Ci/cc.Nofueldefectsorleaksweresuspected.Aftertheshutdown,mmimumcoolantsystemdoseequivalentiodine-131was1.20x10-pCi/cc.Reactorcoolantsystemdegassingwascompletein39hoursinpreparationfortherefuelingandinpm~cular,theadditionofhydrogenperoxideforCo-58solubilization.Oncedegassedandthereactorcoolantsystemlessthan180'F,30%hydrogenperoxidewasaddedtotheprimarycoolantto"cleanup"thecore.Atotaloffour(4)gallonsof30%hydrogenperoxidewasaddedwithamaximumdetectedreactorcoolantCo-58activityof1.14vCi/cc.Cleanupviama~mm>CVCSletdownpurificationflawtookapprox.52hoursofcriticalpathtimandresultedintheremvalofjustover300curiesofCobalt-58.Thisstandardcleanupoperationresultsinthesteamgeneratorarearadiationlevelsremainingatrelativelylowlevelscycleaftercycle.Maximumradiationleveldetectedwas8R/hr.Followingthis"cleanup",theunitcontinuedintoitsrefuelingoperation.Reactorcoolantsystemmonitoringduringthesubsequentstartuphasdetectednonewsourceofactivityandthefuelintegrityseemsassoundasthepreviouscycle.Thesecondarysystemchemistrypriortoshutdownwasfairlygood.Minimaladverseaffectwasnotedduetocondenserinleakagebasedonspecificationsineffectduringthatcycle.Steamgeneratorlimitsduringthiscyclewere<2.0pmhocationconductivitywith<100ppbsodiumcontamination.Steamjetairejectorflowwas25-30scfmactualwithnospecificationineffect.Whenthenewsecondarycyclespecificationsweredrafted,theywereaninitialefforttoneetalltheSteamGeneratorOwnersGroupGuidelinespublishedbyEPRI.Thenewspecificationsincludedreductionofthesteamgeneratorcationconductivityto1.5Rnho's,steamgeneratorsodiumto20ppbandestablisheda10scf'mlimitonthesteamjetairejector,antingotherchanges.Inordertomeetthenew,rrorerestrictivepoweroperationspecifications,limitswerewrittenforvariousstepsduringthestartup.Forexample,priortoenteringmme2,priortoturbineroll,30%,50$,and75-opower.The75%powerspecificationswerelateramnendedtobeineffectat.80%powerorgreater.Pullpoweroperation,asfarassecondarychemistryspecifications,wasdefinedatgreaterthan80%power.Asisstandardpracticeduringrefuelingoutages,thesteamgeneratorsweresludgelancedtoremveaccumulateddepositsfromthetubesheet.Thisoperationsucceededinxeaaving445,140,445,and140lbs.ofsludgefromsteamgeneratorsllthrough14. Asameansofachievingthesenewspecifications,aprogramofsteamgeneratorcreviceflushingwasinitiatedinmade4.Thisbasicallyinvolvesrapiddepressurizationofthesteamgeneratorswhileat280-300'F,causingagitation(boiling)atthetubesheet,andhopefullyinthecrevices.Theexactproceduralmethodforperformingthisactivityremainsinquestion;severalmethodswereattemptednotonlyatthissitebutbyotherutilitiesandno"standard"mthodexiststodate.(EPRIishopingto.issueastandardnathodfortestinginMarch,1984.)Thecreviceflushingactivitiescreateda48hourholduntiltheflushingwascomplete.Startupandpowerascensionwasdelayedduetoholdscausedbythenewchemistryspecifications.Operationaleqmriencegainedduringthisinitialapplicationofthenewsecondary-systemspecificationsshouldbeusedtominimizeholdsinfuturestartups. VcPLANTRADIATIONSURVEYSTheadequacyoftheshieldingdesignforthereactorandassociatedprimarycoolantsystemwasverifiedduringtPeinitialplantstart-up.Surveysduringsubsequentstart-upswereperformedforthefollowingpurposes:1.Verifytheadequacyofanyradiationandshieldingthathasbeensig-,nificantlymodifiedsincethelaststart-up.2.Verifytheadequacyofradiationshieldingsystemsthathavebeensignificantlymodifiedsuchthatthesourcetermmayhavechanged,thuschangingtheshieldingadequacy.3.Verifythatgeneralplantradiationlevelshavenotsignificantlychangedduetovariationsinsourcesthatmayhavebeenaffectedbyfeedchanges.Nosignificantmodificationsweremadetoprimaryshieldingortheprimarycoolantsystemssuchthatthesourcetermforexistingshieldingwouldhavebeenchanged.Asinpastrefuelingperiods,surveysofaccessibleareaswereperformedduringthetransferoffuelfromtherefuelingcavity,throughthetransfertube,andintothespentfuelpool.Nosignificantdifferenceswerefoundfromprevioussimilarsurveys.However,becauseoftherateatwhichfuelmovesthroughthetransfertube,therewassomedoubtthatallareasofra-diationleakagehadbeenidentified.Inanefforttolocateanyradiationleaksthatmightonlyexistforafewsecondsduringnormaltransfertubeus-age,aspentfuelelementwas"parked"invariouslocationsofthetransfertubetoallowamorethoroughsearchforradiationleakagepoints.Increaseswereseeninsidesomeofthealreadypostedhighradiationar-eas,especiallyintheannulusneartheReactorCoolantDr'ainTank."Onthe633'evel,atthejunctionoftheContainmentdomeandtheAuxiliaryBuilding,maximumlevelswentfrom0.2mR/hrto50mR/hrwithfuelinthetransfertube.ThemostsignificantradiationlevelincreaseswerenotedinsidetheCon-tainmentBuildingatthe612'reabetweentheicecondenserwalls.Duringthetimethefuelbundlewasatrestinthetransfertube,theshieldwallsoneithersideofthetransfertubereadamaximumof17R/hr.Althoughthetime-weightedaverageexposureratewithfuelmovingnorma'Ilythroughthetubewouldnotrequirepostingthearea,ropeboundarieswereestablishedsuchthatoutsidetheboundariestheinstantaneousdose-ratewaslessthan100mRem/hr.TheroutinesurveysandShieldSurveyconductedatthestart-upfollowingrefuelingdidnotshowsignificantdifferencesfrompreviousstart-upsurveys. .""VdReactorCoolantFlow~sureaentTheprimarypurposeofthistestwastodeterminethetotalreactorcoolantflowrateindependentofthereactorcoolantflowtransmitters.Thereactorcoolantflowratewascomputedfromasteamgeneratorheatbalancecalculationutilizingsteamgeneratorsecondarysideparamters.lnaddition,it,wasalsothepurposeofthistesttorecalibratethereactorcoolantflowelbowtapdifferentialtransmitters,as~red,basedonthecomputedreactorcoolantflowratesand'elbowtapdifferentialpressuredata.Thetotalcoolantflowratewasdeterminedatboththe48%,68%and100%levelsofreactorthernelpower.ThetablebelowindicatesthatthetotalreactorcoolantflowratefellwithintheacceptableregionoftheTechnicalSpecificationGraph3/4.2-11.TableVd.lComputedReactorCoolantSystemFlowratesat48%,68%and100%ReactorThermalOututLoopNlLoopN2LoopN3LoopN4TotalFlowrateFlow848%3.42x10883.94x1083.55x1083.38x10814.28x10Flow968%(I/hr)3.52x10883.92x1083.61x1083.48x10814.53x10Flow9100%(I/hr)3.43x10883.82x108378x1083.61x10814.40x10TableVd.2AverageValueofPlantParametersUsedinFlowDeterminationParameterBCSPressureRCSTHot(F)RCSTCold(P)MainSteamPressure(psia)FeedwaterPressure(psia)FeedwaterTemperature(F)PeedwaterPlow(PPH),Value94882232570.4541.3878.3898.1370.91530696.Value868%2234580.4539.7840.9867.5401.02292028.Value9100%2232595.6537.4789.6827.5433.73510713.Thecomputedreactorcoolantflowratesandtheelbowtapdifferentialpressuredata,obtainedaspartofthe100%powerdataset,wereusedtorecalibratethereactorcoolantflmrelbowtapdifferentialtransmitters. Eachreactorcoolantloopflowratewascomputedbyperformingheatbalancecalculationsaroundtheshellandtubesideoftheloop'sassociatedsteamgenerator.AsisshowninFigureVe-1steamgeneratorprimaryandsecondarysidepressureandtenperaturedatawassimultaneouslytrendedtoprovidetherequiredinputstotheheatbalanceequations.Alloftherequireddatawasobtainedwhiletheunitwasinasteadysta'teaudeofoperationandsteamgeneratorbio@downwassecured.Thefeedwaterflow,correctedforspecificweightofthefluidandassociatedpipingcharacteristics,wascalculatedfromtheventuridifferential.Thesteamgeneratorthermaloutputwasthencaqputedfrcmthefeedmterflowandtheassociatedincreaseinenthalpy.Finally,thisthermaloutputvaluewastransferredtotheprimarysidewhereitwasusedinconjunctionwiththereactorcoolantenthalpydroptocalculatereactorcoolantflmr.Thetotalreactorcoolantflowwassimplythesumoftheindividualloopflowrates.TableVd.lsulu.-izesthecalculatedflowrates.ThetotalHCSflowratewasverifiedbyNuclearSectiontofallwithintheacceptableregionofTechnicalSpecificationGraph3/4.2-11.TableVd.2liststheprimaryandsecondarysideplantparamteraveragevaluesusedinthereactorcoolantflowdeterminations.Thereactorcoolant.flowdeterminationwasmadeat48%,68%,and100%powerlevels.Ateachleveltheflowdeterminationandthereactorcoolantflowelkstapdifferentialpressuredata(trendedsimultaneouslywiththepressureandtemperaturedatausedintheheatbalanceequations)wereusedtoevaluatetheaccuracyoftheelbowtapdifferentialtransmitters.ThecurrenttrippointfortheindicatedRCSflowis93%.SincetheactualBCSflowisgreaterthantheindicatedflowthe93%trippointisconservativeandatransmitterrecalibrationwasagaindeemedunnecessary.Vd-2 0/fglA .VePantThermalPowerCalibrationThepurposeofthistestwastodeterminereactorthermalpowerbymeasuringsecondarysystemfeedwaterflowandsteamparamters,andtoverifytheaccuracyofthefollowingcomputeroutputs:1.Reactorthermalpower2.Feedwaterflows3.Feedwatertemperatures4.NuclearpowerrangeinsUmrentationByneasuringthesecondarysideparanatersthereactorthermaloutputcanbecalculated.Theparametersthataremeasuredforthispowerdeterminationarefeedwaterflow,feedwatertemperature,feedwaterpressure,andsteampressure.Thepcarerdeterminationhasbeencompleted,atpowerlevelsof48%,68%and100%.8PowerCouterValue(U-lll8)CalculatedValue48%68~o100%47.8667.9099.5047.3767.3699.09Duringtheinitialpoorerascension-programthereactorthermaloutputwascalculatedatvariouspcwerlevelsbyrreasuringsecondarysideparameters.TheseparamtersaresuranarizedinTableVe.l.Bymeasuringthefeedwaterparametersbeforethesteamgeneratorsandthesteamparametersafter,theannuntofenergyaddedbythesteamgeneratorswasdetermined.Theenergygainedbythesteamsideofthesteamgeneratoristheequivalentenergygivenoffbythereactorcoolantsystem.Byknowingtheheattransferredbyeachofthefoursteamgenerators,thetotalheataddedtothesecondarysideofthereactorcoolantsystemisdetermined.Thistotalheataddedtothesecondarysideminustheheat,addedbyRCPoperationandRCSsystemlossesistheactual.reactorpower.Allmeasurementstakenforthisthermalpcwerrreasurerrentwerefrominstrumentscalibratedspecificallyforthistestindependentofcomputerpoints.Thepressuremeasurementswere.readusingdeadweighttesters,feedwaterflowsweremeasuredatthelocaltransmitterforeachloopandtemperatureswerereadusingthexaxeouplesinstalledintestwellsforeachloop'sfeedwaterpiping.Beforethetestisbegunthesteamgeneratorblcwdownisisolatedandallplantparametersareasstableaspossible.Theseconditionsprevailedthroughoutthetest.Thecomputerthermalpowerismonitoredduringtheactualthermalpcwertest.Afterthetestiscompleted,acczrgxrrisonismadebetweenthecomputervalueandtheactualrraasuredvalue. THERMALPGKRCALIBRATIONDATA~oPOKERFKPRESSURE(PSIA)mTEMPERATURE(F)Sm.PRESSURE(PS')ADULATEDCGWVXKRUALUE(U-lll8)~247.3767.3699.0947.8667.9099.50897.72866.42827.68897.72866.52826.48898.22898.82369.70866.52867.52400.24825.38830.58433.31371.20401.45434.42371.49370.34401.79400.80434.21433.00878.7841:5788.6877.9840.4785.9878.1.878.3839.4842.1783.2789.6TABLEUe;1 ~rFlGUREVeal'nchsSteanPressRCTcPessReac-o<ogle=-"Flow'pete~--'-p'o~Peac.orCoolantOuthH~RCPressThSteamGeneratorSteamOuthfF'IFM.TempPress.QQ'Ha0Reac.orC'oolantInFeedwaterIn1Fad.iazarFio:grata=!li=(3B.i)d-'cFa(VY)(Via30)'~i-(alaiklhere:.d=throatdiameterofventuri{inches)C=coefficient"ef-dischargeFa=venturithermalexpansionfac.orY=specificweightoffeedwatr(-.";/ft-)<H20=dierenialpressureacrossventuri(inches)D=pipediameteratinletpressure,tap(inches)2.SteanCeneratorThermalOuput=Bs=lI(n-hf)>!here,:hs=enthalpyofsteam(BTU/.=.)hf-"enthalpyoffeedwater(BTU/.-".)3.ReacorCoolantLoopFlow=Bs/(hH-hc),Where:hH=enthalpyhotleg(BTU/'-)hc=enrhalpycoldleg(STU/;":)4.TotalReactorCoolantLoopFlow=sumof.heloopilows I.'WJ}}