ML17228A459

Suppl 1 to Boric Acid Concentration Reduction Effort Technical Bases & Operational Analysis St Lucie Nuclear Power Plant Unit 1.

ML17228A459
Person / Time
Site:	Saint Lucie
Issue date:	09/30/1991
From:	ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC.
To:
Shared Package
ML17228A456	List: ML17228A455 ML17228A457 ML17228A458 ML17228A459
References
CEN-353(F)-S01, CEN-353(F)-S1, NUDOCS 9403070179
Download: ML17228A459 (18)

Text

SUPPLEMENT1TOBORICACIDCONCENTOTIONREDUCTIONEFFORTCEN-353(P)TECHNICALBASESANDOPERATIONALANALYSISSAINTLUCIENUCLEARPOWERPLANTUNIT1PREPAREDFORFLORIDAPOWER&.LIGHTCOMPANYBYABBCOMBUSTIONENGINEERINGNUCLEARSERVICES9403070179940222PDRADOCKOS00033S~P..PDR BoricAcidConcentrationReductionEort.Sul.lTABLEOFCONTENTSCEN-353F1.02.03.040PURPOSEANDSCOPESUMMARYOFRESULTSTECHNICALBASESFORREVISIONS3.1REVISEDBAMTVOLUMEREQUIREMENTS3.2REVISEDBASESSECTION3/4.

1.2REFERENCES

1012TABLESTABLE3-1BAMTBORATIONVOLUMETABLE3-2REQUIREDBAMTSTORAGEVOLUMEFIGURESFIG.3-1ST.LUCIE1MINIMUMBAMTVOLUMEvs.STOREDBAMTCONCENTRATIONAPPENDIXATECHNICALSPECIFICATIONINPUTFORST.LUCIEUNIT1A-1ABBCombustionEngineeringNuclearServicesPage2of12 BoricAcidConcentrationReductionEort.Sul.1CEN-353(F1.0PurposeandScopeThepurposeofthisSupplementtotheBoricAcidConcentrationReduction(BACR)reportis.toprovideanadjustmenttotheBoricAcidMakeupTank(BAMT)VolumeandconcentrationrequirementsfortheSt.LucieUnit1TechnicalSpecificationsSection3.1.2.8.ThisadjustmentisdueonlytorevisinganassumptionthatwasmadeintheBACRReport,CEN-353(F),Rev03.ThissupplementmodifiesanoriginalassumptionthattheBAMTwouldbeneededasthesourceoffluidfordepressurizationoftheRCSfrom2200psiatotheHighPressureSafetyInjection(HPSI)pumpshutoffhead.ThedepressurizationwouldrequireadditionalinventoryifthemotoroperatedvalvebetweentheRefuelingWaterTank(RWT)andthechargingpumpsuction,V2504,failedtoopenautomatically,andcouldnotbeopenedmanually.Oncethedepressurizationoccurred,thecooldowncouldbecontinuedusingfluidfromtheRWT.ThisrevisionnowassumesthatV2504canbeopenedmanually,therefore,theBAMTinventoryneededtodepressurizetotheHPSIpumpshutoffheadisnolongerrequired.ThisresultsinrevisionoftherequiredBAMTborationvolumesandtheTechnicalSpecificationBAMTstoragerequirements.ThisSupplementisapplicabletoSt.LucieUnit1only.RevisionoftheBAMTVolumerequirementswillalsoresultinachangetotheBAMTvolumeslistedintheTechnicalSpecificationBASESSection3/4.1.2.ThellBASESvalueswerepresentedonpages32and33ofthereport.Inthereport,thetextoftheBasesinsertusedtheexactBAMTborationvolume,ratherthantheABBCombustionEngineeringNuclearServicesPage3ofl2 BoricrlcidConcelurntionReductionEorr.Sul.iCEJV-353IFrequiredstoragevolume.TheBASEStextwasrevisedtocorrespondtotherequiredstoragevolumes,whichwereconservative.SincetheassumptionchangeofthiscalculationrevisesthevolumeadjustmentbetweentheBAMTborationvolumeandtherequiredstoragevolume,theBASESinsertwillberevised.2.0SummarofResultsTheproposedTechnicalSpecificationinputsforSt.LucieUnit1forSection3.1.2.8andBASESSection3/4.1.2arecontainedinAppendixA.TherevisedvaluessuppliedinAppendixAarederivedinSection3.1and3.2below.3.0TechnicalBasesforRevisions3.1RevisedBAMTVolumeRequirementsAsstatedabove,thepurposeofthissupplementistodocumenttherevisionoftheadjustmentbetweentheBAMTborationvolumesandtheTechnicalSpecificationBAMTstoragerequirements.Inthepreviousrevisiontothisreport,manualoperationofV2504(themotoroperatedvalvebetweentheRWTandthechargingpumpsuction)wasnotassumedforapostulatedfailuretoopenautomatically.SinceRWTwaterwouldberiBBColnbustionEngineeringnuclearServicesPnge4of12 BoricAcidConcentrationReductionEort.Sul.1CEN-353(FunavailablethroughtheCVCSforcooldownwithV2504'closed,additionalwaterinventoryrequirementswereimposedontheBAMTstoallowfordepressurizationoftheRCSdowntoHPSIshutoffhead(1200psia)usingauxiliaryspray.Avolumeadjustmentof1000gallonswasused,tocoverthe905.9gallonsrequiredforthedepressurization(CEN-353(F),Rev.03,Page29).Theborationvolumeswereadjustedbyroundinguptothenext50gallonsandthenadding1000gallonstocoverthedepressurizationvolume.ManualhandwheeloperationofmotoroperatedvalveV2504isacceptableforSt.LucieUnit1cooldownscenarios.RevisingthisassumptionwillmaketheSt.LucieUnit1analysisagreewiththeUnit2analysisforthisassumption.WithmanualoperationofV2504,adjustmentoftheborationvolumetoincludethevolumefordepressurizationwillnolongerberequired.InCEN-353(F),Rev.03,theBAMTborationvolumesforeachcombinationofBAMTandRWTconcentrationswasprovidedinTable2-34onpage73.ThesevaluesarerepeatedinTable3-1below.ABBCotnbustionEngineeringNuclearServicesPage5of12 BoricAcidConcentrationReductionEort,Sul.iTABLE3-1CEJV-353FBORICACIDMAKEUPTANKMINIMUMBORATIONVOLUMESVSSTOREDBORICACIDCONCENTRATIONFORMODES1,2,3AND4MINIMUMVOLUME(GALLONS)BAMTatwt%17201850RWTatRWTatRWTat2000RWTatRWTat21502300ppmppmppmppmppm2.502.753.003.253.508194.57703.9.6966.86607.96185.45689.85406.05065.44887.74535.67221.16129.95235.24594.04130.16714.56019.35577.74946.84769.94187.74130.13650.93713.23213.1DuringtheSt.LucieUnit2BACRanalysis,500gallonswereaddedtotheBAMTborationvolumesforconservatism.TobeconsistentwithUnit2,500gallonswillbeaddedtotheSt.LucieUnit1BAMTborationvolumestodefinetherevisedTechnicalSpecificationBAMTStoragevolumerequirements.Theborationvolumes;villberoundeduptothenext50gallons,and500gallonswillbeaddedforconservatism.TheresultingRequiredBAMTStorageVolumesarecontainedinTable3-2andareplottedinFigure3-1.Figure3-1providestherevisedstoragerequirementstoreplaceFigure2-6onpage82ofthemainreport.ABBCombustionEngineeringNuclearServicesPage6ofl2

BoricAcidConcentrationReductionEort.SuI.lCEN-353/'FTABLE3-2MINIMUMBORICACIDMAKEUPTANKVOLUMEVS.STOREDBORICACIDMAKEUPTANKCONCENTRATIONMINIMUMVOLUME(GALLONS)BAMTatwt,%172018502000RWTatRWTatRWTatRWTat2150RWSTat2300ppmppmppmppmppm2.50870082507750725065502.75750071506650610054503.00670062005750530047003.253.505950540056005100505046504650425042003750FP&LcurrentlyrequeststhatonlyonecurvebepresentedintheRequiredBAMTVolumecurve,TechnicalSpecificationFigure3.1-1,ratherthanthefamilyofcurvesforvariousRWTconcentrations.FP&LrequeststhatonlythecurvefortheRWTat1720ppmbeprovided.ThenewTechnicalSpecificationFigure3.1-1iscontainedinAppendixA.ABBCotnbustionEngineeringNttclearServicesPage7of12 BoricAcidConcentrationReductionEort.Sul.lCEN-353(FSincethenewRequiredBAMTvolumescanbecontainedinonetankforthefullrangeofboricacidconcentrations,someofthetextforTechnicalSpecificationSection3.1.2.8canbedeleted.Whenthevolumerequirementforthefullrangeofconcentrationscouldnotfitinonetank,thecurrentspecificationrequiredaboricacidconcentrationbetween3.2-3.5weightpercent.TherevisedspecificationiscontainedinAppendixA.ABBCombustionEngineeringNuclearServicesPage8of12 BoricAcidConcentrationReductionEortSu>~l.ICEN-353FFIGURE3-1ST,LUCIE1IVIINBAMTVOLUMEvsSTOREDBAMTCONCENTRATIONQ7g~60~52.62.83.03.2STOREDBAMTCONC(wt%boricacid)3.43.6~1720PPM~1850PPM~2000PPM~2150PPM~2300PPMIHRWTINRWTINRWTINRWTIHRWTABBCombustionEngineeringNuclertrSetvicesPage9ofl2 BoricAcidConcentrationReductionEort.Sul.lCEN-353(F3.2TechnicalSecificationBASESSection3/4.1.2TheTechnicalSpecificationBASESSection3/4.1.2wasoriginallypresentedonpages32and33ofCEN-353(F),Rev.03.ThepurposeofthatsectionwastodeterminethenewBAMTandRWTvolumevaluesfortheTechnicalSpecificationBASESsection.ThesectionusedtheBAMTborationvolumesasinputstodeterminetherequiredRWTvolumeforthecooldowndependingontheBAMTconcentrationused.ItalsodeterminedtheRWTvolumerequiredifnoBAMTvolumewasused.WhiletheactualBAMTBorationVolumevalueswereusedinthesection,therevisedtextoftheBASESSectionshouldreporttheBAMTStorageVolumeRequirementsasthevolumeused.SincetheBAMTStorageVolumeRequirementsaregreater,thisisconservative.TheBAMTStorageVolumesareusedtomaketheBASESSectionconsistentwiththeBAMTStorageVolumescontainedinFigure3.1-1andTechnicalSpecificationSection3.1.2.8'.SincetheTechnicalSpecificationBAMTStorageVolumeRequirementswererevisedinSection3.1above,TheBASESSectionshouldberevisedtocorrespondtothenewBAMTStorageVolumeRequirements.SincetheBAMTBorationVolumeswereusedtocalculatetheRWTvolumerequirements,andtheBAMTBorationVolumeshavenotchanged,thereisnoneedtorevisetheRWTvolumerequirements.rhBBCombustionEngineeringNuclearServicesPage10of12 BoricAcidConcentrationReductionEort.Sul.lCEN-353FTherevisedtextfortheBASESSectionisasfollows:"TheborationcapabilityofeithersystemissufficienttoprovideaSHUTDOWNMARGINfromalloperatingconditionsof2000pcmafterxenondecayandcooldownto200degreesF.Themaximumboration'apabilityrequirementoccursatEOLfromfullpowerequilibriumxenonconditions.ThisrequirementcanbemetforarangeofboricacidconcentrationsontheBoricAcidMakeupTanks(BAMTs)andRefuelingWaterTank(RWT).Thisrangeisboundedby5400gallonsof3.5weightpercent(6119ppmboron)boricacidfromtheBAMTsand17,000gallonsof1720ppmboratedwaterfromtheRWTto8700gallonsof2.5weightpercent(4371ppmboron)boricacidfromtheBAMTsand13,000gallonsof1720ppmboratedwaterfromtheRWT.Aminimumof45,000gallonsof1720ppmboronisrequiredfromtheRWTifitistobeusedtoboratetheRCSalone."ThistextiscontainedinAppendixA.ABBCombustionEngineeringNuclearServicesPagellof12 BoricAcidConcentrationReductionEort.Suol.lCEN-353(FJ

4.0REFERENCES

4.1ABB-CECalculation607784-MPS-1CALC-001,Revision00,"St.LucieUnit1InputtoTechnicalSpecifications3.1.2.8and4.1.2.8",dated9/25/90.4.2ABB-CECalculationF-MPS-CALC-002,Rev.00,"InputtoSt.LucieUnit1TechnicalSpecificationSystemBases",dated9/26/91.4.3StLucieUnit1TechnicalSpecifications,throughAmendment122,dated5/03/93.4.4ABB-CECalculationF-MECH-CALC-016,Rev.00,"FP&LSt.Lucie1RevisionofTechnicalSpecificationSection3.1.2.8andBASES3/4.1.2",dated10/21/93.ABBCombustionEngineeringNuclearServicesPagel2of12 BoricAcidConcentrationReductionEort.Sul.lCEN-353(F)APPENDIXATechnicalSpecificationInputforSt.LucieUnit1ABBCombustionEngineeringNuclearServicesPageA-lof5 BoricAcidConcentrationReductionEurt.Surl.lCEN-353FFIGURE3.1-1ST.LUCIE1lVIINBAMTVOLUMEYSSTOREDBAMTCONCENTRATION9,000V)O8,000GJCD(8700)ACCEPTABLEOPERATION(7500)~7,000O)I-~e,oooZ'6700)UNACCEPTABLEOPERATION(6960)5,000(6400)2.42.62.833.23.43.6(4646PPM)(5245ppM)(6g44PPM)(4196PPM)(4896PPM)(55g6ppM)(62g4ppM)STOREDBAMTCONC(wt%boricacid)ST.LUCIE-UNITI3/41-1/ABBCombustionEngineeringNuclearServicesPageA-2of5

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