ML17228A459

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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 NextEra Energy icon.png
Issue date: 09/30/1991
From:
ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY, ASEA BROWN BOVERI, INC.
To:
Shared Package
ML17228A456 List:
References
CEN-353(F)-S01, CEN-353(F)-S1, NUDOCS 9403070179
Download: ML17228A459 (18)


Text

SUPPLEMENT 1TOBORICACIDCONCENTOTIONREDUCTION EFFORTCEN-353(P)

TECHNICAL BASESANDOPERATIONAL ANALYSISSAINTLUCIENUCLEARPOWERPLANTUNIT1PREPAREDFORFLORIDAPOWER&.LIGHTCOMPANYBYABBCOMBUSTION ENGINEERING NUCLEARSERVICES9403070179 940222PDRADOCKOS00033S~P..PDR BoricAcidConcentration Reduction Eort.Sul.lTABLEOFCONTENTSCEN-353F1.02.03.040PURPOSEANDSCOPESUMMARYOFRESULTSTECHNICAL BASESFORREVISIONS 3.1REVISEDBAMTVOLUMEREQUIREMENTS 3.2REVISEDBASESSECTION3/4.

1.2REFERENCES

1012TABLESTABLE3-1BAMTBORATIONVOLUMETABLE3-2REQUIREDBAMTSTORAGEVOLUMEFIGURESFIG.3-1ST.LUCIE1MINIMUMBAMTVOLUMEvs.STOREDBAMTCONCENTRATION APPENDIXATECHNICAL SPECIFICATION INPUTFORST.LUCIEUNIT1A-1ABBCombustion Engineering NuclearServicesPage2of12 BoricAcidConcentration Reduction Eort.Sul.1CEN-353(F 1.0PurposeandScopeThepurposeofthisSupplement totheBoricAcidConcentration Reduction (BACR)reportis.toprovideanadjustment totheBoricAcidMakeupTank(BAMT)Volumeandconcentration requirements fortheSt.LucieUnit1Technical Specifications Section3.1.2.8.Thisadjustment isdueonlytorevisinganassumption thatwasmadeintheBACRReport,CEN-353(F),

Rev03.Thissupplement modifiesanoriginalassumption thattheBAMTwouldbeneededasthesourceoffluidfordepressurization oftheRCSfrom2200psiatotheHighPressureSafetyInjection (HPSI)pumpshutoffhead.Thedepressurization wouldrequireadditional inventory ifthemotoroperatedvalvebetweentheRefueling WaterTank(RWT)andthechargingpumpsuction,V2504,failedtoopenautomatically,and couldnotbeopenedmanually.

Oncethedepressurization

occurred, thecooldowncouldbecontinued usingfluidfromtheRWT.ThisrevisionnowassumesthatV2504canbeopenedmanually, therefore, theBAMTinventory neededtodepressurize totheHPSIpumpshutoffheadisnolongerrequired.

ThisresultsinrevisionoftherequiredBAMTborationvolumesandtheTechnical Specification BAMTstoragerequirements.

ThisSupplement isapplicable toSt.LucieUnit1only.RevisionoftheBAMTVolumerequirements willalsoresultinachangetotheBAMTvolumeslistedintheTechnical Specification BASESSection3/4.1.2.ThellBASESvalueswerepresented onpages32and33ofthereport.Inthereport,thetextoftheBasesinsertusedtheexactBAMTborationvolume,ratherthantheABBCombustion Engineering NuclearServicesPage3ofl2 BoricrlcidConcelurntion Reduction Eorr.Sul.iCEJV-353IF requiredstoragevolume.TheBASEStextwasrevisedtocorrespond totherequiredstoragevolumes,whichwereconservative.

Sincetheassumption changeofthiscalculation revisesthevolumeadjustment betweentheBAMTborationvolumeandtherequiredstoragevolume,theBASESinsertwillberevised.2.0SummarofResultsTheproposedTechnical Specification inputsforSt.LucieUnit1forSection3.1.2.8andBASESSection3/4.1.2arecontained inAppendixA.TherevisedvaluessuppliedinAppendixAarederivedinSection3.1and3.2below.3.0Technical BasesforRevisions 3.1RevisedBAMTVolumeRequirements Asstatedabove,thepurposeofthissupplement istodocumenttherevisionoftheadjustment betweentheBAMTborationvolumesandtheTechnical Specification BAMTstoragerequirements.

Inthepreviousrevisiontothisreport,manualoperation ofV2504(themotoroperatedvalvebetweentheRWTandthechargingpumpsuction)wasnotassumedforapostulated failuretoopenautomatically.

SinceRWTwaterwouldberiBBColnbustion Engineering nuclearServicesPnge4of12 BoricAcidConcentration Reduction Eort.Sul.1CEN-353(F unavailable throughtheCVCSforcooldownwithV2504'closed, additional waterinventory requirements wereimposedontheBAMTstoallowfordepressurization oftheRCSdowntoHPSIshutoffhead(1200psia)usingauxiliary spray.Avolumeadjustment of1000gallonswasused,tocoverthe905.9gallonsrequiredforthedepressurization (CEN-353(F),

Rev.03,Page29).Theborationvolumeswereadjustedbyroundinguptothenext50gallonsandthenadding1000gallonstocoverthedepressurization volume.Manualhandwheel operation ofmotoroperatedvalveV2504isacceptable forSt.LucieUnit1cooldownscenarios.

Revisingthisassumption willmaketheSt.LucieUnit1analysisagreewiththeUnit2analysisforthisassumption.

Withmanualoperation ofV2504,adjustment oftheborationvolumetoincludethevolumefordepressurization willnolongerberequired.

InCEN-353(F),

Rev.03,theBAMTborationvolumesforeachcombination ofBAMTandRWTconcentrations wasprovidedinTable2-34onpage73.ThesevaluesarerepeatedinTable3-1below.ABBCotnbustion Engineering NuclearServicesPage5of12 BoricAcidConcentration Reduction Eort,Sul.iTABLE3-1CEJV-353FBORICACIDMAKEUPTANKMINIMUMBORATIONVOLUMESVSSTOREDBORICACIDCONCENTRATION FORMODES1,2,3AND4MINIMUMVOLUME(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.

Tobeconsistent withUnit2,500gallonswillbeaddedtotheSt.LucieUnit1BAMTborationvolumestodefinetherevisedTechnical Specification BAMTStoragevolumerequirements.

Theborationvolumes;vill beroundeduptothenext50gallons,and500gallonswillbeaddedforconservatism.

Theresulting RequiredBAMTStorageVolumesarecontained inTable3-2andareplottedinFigure3-1.Figure3-1providestherevisedstoragerequirements toreplaceFigure2-6onpage82ofthemainreport.ABBCombustion Engineering NuclearServicesPage6ofl2

BoricAcidConcentration Reduction Eort.SuI.lCEN-353/'F TABLE3-2MINIMUMBORICACIDMAKEUPTANKVOLUMEVS.STOREDBORICACIDMAKEUPTANKCONCENTRATION MINIMUMVOLUME(GALLONS)

BAMTatwt,%172018502000RWTatRWTatRWTatRWTat2150RWSTat2300ppmppmppmppmppm2.50870082507750725065502.75750071506650610054503.00670062005750530047003.253.505950540056005100505046504650425042003750FP&Lcurrently requeststhatonlyonecurvebepresented intheRequiredBAMTVolumecurve,Technical Specification Figure3.1-1,ratherthanthefamilyofcurvesforvariousRWTconcentrations.

FP&LrequeststhatonlythecurvefortheRWTat1720ppmbeprovided.

ThenewTechnical Specification Figure3.1-1iscontained inAppendixA.ABBCotnbustion Engineering NttclearServicesPage7of12 BoricAcidConcentration Reduction Eort.Sul.lCEN-353(F SincethenewRequiredBAMTvolumescanbecontained inonetankforthefullrangeofboricacidconcentrations, someofthetextforTechnical Specification Section3.1.2.8canbedeleted.Whenthevolumerequirement forthefullrangeofconcentrations couldnotfitinonetank,thecurrentspecification requiredaboricacidconcentration between3.2-3.5weightpercent.Therevisedspecification iscontained inAppendixA.ABBCombustion Engineering NuclearServicesPage8of12 BoricAcidConcentration Reduction EortSu>~l.ICEN-353FFIGURE3-1ST,LUCIE1IVIINBAMTVOLUMEvsSTOREDBAMTCONCENTRATION Q7g~60~52.62.83.03.2STOREDBAMTCONC(wt%boricacid)3.43.6~1720PPM~1850PPM~2000PPM~2150PPM~2300PPMIHRWTINRWTINRWTINRWTIHRWTABBCombustion Engineering NuclertrSetvicesPage9ofl2 BoricAcidConcentration Reduction Eort.Sul.lCEN-353(F 3.2Technical Secification BASESSection3/4.1.2TheTechnical Specification BASESSection3/4.1.2wasoriginally presented onpages32and33ofCEN-353(F),

Rev.03.Thepurposeofthatsectionwastodetermine thenewBAMTandRWTvolumevaluesfortheTechnical Specification BASESsection.ThesectionusedtheBAMTborationvolumesasinputstodetermine therequiredRWTvolumeforthecooldowndepending ontheBAMTconcentration used.Italsodetermined theRWTvolumerequiredifnoBAMTvolumewasused.WhiletheactualBAMTBorationVolumevalueswereusedinthesection,therevisedtextoftheBASESSectionshouldreporttheBAMTStorageVolumeRequirements asthevolumeused.SincetheBAMTStorageVolumeRequirements aregreater,thisisconservative.

TheBAMTStorageVolumesareusedtomaketheBASESSectionconsistent withtheBAMTStorageVolumescontained inFigure3.1-1andTechnical Specification Section3.1.2.8'.

SincetheTechnical Specification BAMTStorageVolumeRequirements wererevisedinSection3.1above,TheBASESSectionshouldberevisedtocorrespond tothenewBAMTStorageVolumeRequirements.

SincetheBAMTBorationVolumeswereusedtocalculate theRWTvolumerequirements, andtheBAMTBorationVolumeshavenotchanged,thereisnoneedtorevisetheRWTvolumerequirements.

rhBBCombustion Engineering NuclearServicesPage10of12 BoricAcidConcentration Reduction Eort.Sul.lCEN-353FTherevisedtextfortheBASESSectionisasfollows:"Theborationcapability ofeithersystemissufficient toprovideaSHUTDOWNMARGINfromalloperating conditions of2000pcmafterxenondecayandcooldownto200degreesF.Themaximumboration'apability requirement occursatEOLfromfullpowerequilibrium xenonconditions.

Thisrequirement canbemetforarangeofboricacidconcentrations ontheBoricAcidMakeupTanks(BAMTs)andRefueling WaterTank(RWT).Thisrangeisboundedby5400gallonsof3.5weightpercent(6119ppmboron)boricacidfromtheBAMTsand17,000gallonsof1720ppmboratedwaterfromtheRWTto8700gallonsof2.5weightpercent(4371ppmboron)boricacidfromtheBAMTsand13,000gallonsof1720ppmboratedwaterfromtheRWT.Aminimumof45,000gallonsof1720ppmboronisrequiredfromtheRWTifitistobeusedtoboratetheRCSalone."Thistextiscontained inAppendixA.ABBCombustion Engineering NuclearServicesPagellof12 BoricAcidConcentration Reduction Eort.Suol.lCEN-353(F J

4.0REFERENCES

4.1ABB-CECalculation 607784-MPS-1CALC-001, Revision00,"St.LucieUnit1InputtoTechnical Specifications 3.1.2.8and4.1.2.8",

dated9/25/90.4.2ABB-CECalculation F-MPS-CALC-002, Rev.00,"InputtoSt.LucieUnit1Technical Specification SystemBases",dated9/26/91.4.3StLucieUnit1Technical Specifications, throughAmendment 122,dated5/03/93.4.4ABB-CECalculation F-MECH-CALC-016, Rev.00,"FP&LSt.Lucie1RevisionofTechnical Specification Section3.1.2.8andBASES3/4.1.2",

dated10/21/93.

ABBCombustion Engineering NuclearServicesPagel2of12 BoricAcidConcentration Reduction Eort.Sul.lCEN-353(F)

APPENDIXATechnical Specification InputforSt.LucieUnit1ABBCombustion Engineering NuclearServicesPageA-lof5 BoricAcidConcentration Reduction Eurt.Surl.lCEN-353FFIGURE3.1-1ST.LUCIE1lVIINBAMTVOLUMEYSSTOREDBAMTCONCENTRATION 9,000V)O8,000GJCD(8700)ACCEPTABLE OPERATION (7500)~7,000O)I-~e,oooZ'6700)UNACCEPTABLE OPERATION (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/ABBCombustion Engineering NuclearServicesPageA-2of5

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