ML17221A587: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
Line 17: Line 17:


=Text=
=Text=
{{#Wiki_filter:ATTACHMENTIMarked-upTechnicalSpecificationPageSt.LucieUnitl5-688012700148003pDRADOCN,0500@DR'P-EJW4/0I7/3 0~e.SlgShIM4gI13*~  
{{#Wiki_filter:ATTACHMENT IMarked-up Technical Specification PageSt.LucieUnitl5-68801270014 8003pDRADOCN,0500@DR'P-EJW4/0I7/3 0~e.SlgShIM4gI13*~  
~~I~~~,~~~~~~~~I~IetI~~~~~~~~~~~~'~~~'.~~II~~II~~~~l-~i~~~~~~~)~~sI~~~~~~I,~~~I~'~~I~~~I~~~~~,~~~~~~~~~~~~~~~~~~II~I'I~II~~~~i'ii~I''~~~~~~~I~~i~~~~~~~~~~i~~~I t
~~I~~~,~~~~~~~~I~IetI~~~~~~~~~~~~'~~~'.~~II~~II~~~~l-~i~~~~~~~)~~sI~~~~~~I,~~~I~'~~I~~~I~~~~~,~~~~~~~~~~~~~~~~~~II~I'I~II~~~~i'ii~I''~~~~~~~I~~i~~~~~~~~~~i~~~I t
ATTACHMENT2SAFETYEVALUATlONEJWOIOi7/e SAFETYEVALUATIONBackroundThecurrentlylicensedfuelenrichmentlimitatSt.LucieUnitIfortheexistingnewfuelstorageracks,spentfuelracksandfuelhandlingstructuresis40w/oU235.FloridaPowerandLightCompany(FPL)hassubmittedaproposedlicenseamendmentinsupportofre-rackingtheUnitIspentfuelpoolwithhighdensitystorageracks(FPLletterL-87-245,datedJune12,1987).Thatsubmittaladdressestherequiredanalysis,i.e.,criticality,thermalhydraulic,seismic,etc.insupportofreplacingtheexistingspentfuelracks.Thecriticalityanalysisinthere-racksubmittalsupportsanenrichmentlimitof4.5w/oU-235forthehighdensityspentfuelracks.Thecriticalityanalysisfortheexistingnewfuelstorageracksandfuelhandlingequipment(AppendixI)wasperformedseparatelyfromthere-rackanalysis.Thissubmittalsupportsincreasingtheenrichmentspecificationofthenewfuelstorageracktechnicalspecification(5.6.1.b)to4.5w/O'-235.FPLisrequestingtoincreasethemaximumenrichmentspecificationofthenewfuelstoragerackCriticalityTechnicalSpecification(5.6.1..b)atSt.LucieUnitIto<4.5w/oU-235.Thisproposedchangeallowsincreasedflexi6ilityinfuelmanagementandaccommodatesstorageofhigherenrichmentsforpossibleuseinfuture'cycles.SafetEvaluationTheanalysisoftheproposedincreaseinfuelenrichmenthasbeenaccomplishedusingcurrentlyacceptedcodesandstandardsasspecifiedintheSafetyAnalysisReport.Calculationsperformedforthehandlingandstorage(newfuelracks)of4.5w/oU-235enrichedfuelassembliesdemonstratethattheapplicablecriticalityacceptancecriteriaaremet.Calculationsperformedforthenewfuelstorageracksatvariousdegreesofmoderation,includingfullflooding,indicatethatthelimitingkeffoccursforamoderatorvoidfractionof0.91andhasavalueof0.974atthe95Kconfidencelevel.Thisvalueislowerthanthesafetycriterialimitof0.98quotedintheapplicablestandardsfornewfuelstorageracksunderoptimummoderationconditions.Criticalityca1culationswerealsoperformedforthefuelhandlingstructures(fuelelevator,upenderandtransfertube)atapoolwatertemperatureof68oF.Themostreactivesituationduringnormalfuelhandlingoperationswasconservativelyassumed
ATTACHMENT 2SAFETYEVALUATlON EJWOIOi7/e SAFETYEVALUATION BackroundThecurrently licensedfuelenrichment limitatSt.LucieUnitIfortheexistingnewfuelstorageracks,spentfuelracksandfuelhandlingstructures is40w/oU235.FloridaPowerandLightCompany(FPL)hassubmitted aproposedlicenseamendment insupportofre-racking theUnitIspentfuelpoolwithhighdensitystorageracks(FPLletterL-87-245, datedJune12,1987).Thatsubmittal addresses therequiredanalysis, i.e.,criticality, thermalhydraulic, seismic,etc.insupportofreplacing theexistingspentfuelracks.Thecriticality analysisinthere-racksubmittal supportsanenrichment limitof4.5w/oU-235forthehighdensityspentfuelracks.Thecriticality analysisfortheexistingnewfuelstorageracksandfuelhandlingequipment (Appendix I)wasperformed separately fromthere-rackanalysis.
'tooccurwhentwoassembliesarelocated4inchesedgetoedgefromeachother.Theresultingkefffromthisscenariois0.929atthe95Kconfidencelevel.Forpostulatedaccidentssuchashavingtwoassembliesbyaccidentachieveabundletobundlespacingoflessthan4inches,creditmaybetakenforrealisticpoolconditions.Theseconditionsincludetakingcreditforsolubleboron(>1720ppm)presentinthepoolwater.Atthisboronconcentration,thekeffisreducedbyapproximately0.20,resultinginreactivitiesfarbelowthe0.95limit.Hence,postulatedaccidentsinthefuelhandlingsystemareoflittleconcernfromacriticalitysafetystandpoint.Basedontheforegoingdiscussion,itisconcludedthatthefuelelevatorupenderandtransfertubewillmeetthesafetycriterialimitofkeff<0.95.
Thissubmittal supportsincreasing theenrichment specification ofthenewfuelstorageracktechnical specification (5.6.1.b) to4.5w/O'-235.
ATTACHMENT3DETERMINATIONOFNOSIGNIFICANTHAZARDSCONSIDERATIONThestandardsusedtoarriveatadeterminationthatarequestforamendmentinvolvesnosignificanthazardsconsiderationareincludedintheCommission'sregulations,IOCFR50.92,whichstatesthatnosignificanthazardsconsiderationsareinvolvediftheoperationofthefacilityinaccordancewiththeproposedamendmentwouldnot(I)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or(2)createthepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated;or(3)involveasignificantreductioninamarginofsafety.Eachstandardisdiscussedasfollows:(I)Operationofthefacilityinaccordancewiththeproposedamendmentwouldnotinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.FPLhasidentifiedafuelassemblydropasapotentialaccidentscenariowhoseconsequenceswouldbeaffectedbytheproposedchange.Forthistypeofaccident,thecriticalityacceptancecriterionisnotviolated.Basedontheabove,itisconcludedthattheproposedamendmentwillnotresultinanincreaseoftheprobabilityorconsequencesofaccidentspreviouslyevaluated.(2)Vseofthemodifiedspecificationwouldnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Therequestedchangedoesnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluatedbecausetheplantconfigurationandthemannerinwhichitisoperatedremainthesame.Theproposedchangedoesnotconstituteanychangeintheproceduresforplantoperationorhardware.Inaddition,FPLhasevaluatedtheproposedtechnicalspecificationchangesinaccordancewiththeappropriateIndustryCodesandStandardsand,basedonthisevaluation,FPLfindsthattheproposedtechnicalspecif'icationchangedoesnotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.(3)Vseofthemodifiedspecificationwouldnotinvolveasignificantreductioninamarginofsafety.Theproposedchangedoesnotinvolveasignificantreductioninamarginofsafety.Thenewfuelstoragerackcalculatedkeffof0.974(95%confidencelevel)islowerthantheestablishedacceptancecriteriaof<0.98keff.The0.929keff(95%confidencelevel)calculatedforthefuelhandlingstructuresisalsoconsiderablylowerthantheestablishedacceptancecriteriaof<0.95keff.Theabovecalculatedneutronmultiplicationfactorsincludeallthenecessarybiasesanduncertainties.Asnotedabove,therequiredacceptancecriteria(<0.98keffunderoptimunmoderationconditionsand0.95underfullyfloodedconditionsforthenewfuelstorageracks,and<0.95keffforthefuelhandlingstructures)havebeenadheredtointhecriticalityanalysisperformedinsupportofthisproposedtechnicalspecificationchange.Specifically,theEJW4/0I7/5 4I4IIII'lIIIl4,4II\~FI4~II'W,tliIIII'4IgI44JrII4,~4II'I4~IIlII4FW~\'I4IIgtkll4'.FhI,IWIhIt4~l.I~IF44444,I4hlhtt,r4~~1444'4I'IIIIIII44IFW4I41IIWIII)'4I,4I~I~I4IW41Nh'WI4'I~I4I4'III~IWII~'uI'4'~4IIhflI411444I4'Im1'll-'.I*I 0.02keffand0.05keffcriticalitymarginofsafetyrequiredforthenewfuelstorageareaunderoptimummoderationandfullyfloodedconditionsrespectively,and0.05keffcriticalitymarginofsafetyrequiredforthefuelhandlingstructureshavebeenmaintained.Basedonthepreviousdiscussion,theproposedamendmenttoincreasetheallowablefuelU-235enrichmentinthenewfuelstorageracksandfuelhandlingequipmentwillnotinvolveasignificantreductioninamarginofsafety.Basedontheabove,'wehavedeterminedthattheamendmentrequestdoesnot(l)involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated,(2)createtheprobabilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated,or(3)involveasignificantreductioninamarginofsafety;andthereforedoesnotinvolveasignificanthazardsconsideration.EJWO/0I7/6 0p=<<I<<4i,<<l,<<UIII-<<~I4fl4>>I,,II4fIi~ffIfU<<ILI4~.4I4<<I<<~il~<<.4<<~4"~~'I.I,4,~<<44U'i''f4444Ul~''4II<<4<<<<~4il<<4<<"<<<<~ikll4L.~~3<<-<<<<
FPLisrequesting toincreasethemaximumenrichment specification ofthenewfuelstoragerackCriticality Technical Specification (5.6.1..b) atSt.LucieUnitIto<4.5w/oU-235.Thisproposedchangeallowsincreased flexi6ility infuelmanagement andaccommodates storageofhigherenrichments forpossibleuseinfuture'cycles.SafetEvaluation Theanalysisoftheproposedincreaseinfuelenrichment hasbeenaccomplished usingcurrently acceptedcodesandstandards asspecified intheSafetyAnalysisReport.Calculations performed forthehandlingandstorage(newfuelracks)of4.5w/oU-235enrichedfuelassemblies demonstrate thattheapplicable criticality acceptance criteriaaremet.Calculations performed forthenewfuelstorageracksatvariousdegreesofmoderation, including fullflooding, indicatethatthelimitingkeffoccursforamoderator voidfractionof0.91andhasavalueof0.974atthe95Kconfidence level.Thisvalueislowerthanthesafetycriterialimitof0.98quotedintheapplicable standards fornewfuelstorageracksunderoptimummoderation conditions.
Criticality ca1culationswerealsoperformed forthefuelhandlingstructures (fuelelevator, upenderandtransfertube)atapoolwatertemperature of68oF.Themostreactivesituation duringnormalfuelhandlingoperations wasconservatively assumed
'tooccurwhentwoassemblies arelocated4inchesedgetoedgefromeachother.Theresulting kefffromthisscenariois0.929atthe95Kconfidence level.Forpostulated accidents suchashavingtwoassemblies byaccidentachieveabundletobundlespacingoflessthan4inches,creditmaybetakenforrealistic poolconditions.
Theseconditions includetakingcreditforsolubleboron(>1720ppm)presentinthepoolwater.Atthisboronconcentration, thekeffisreducedbyapproximately 0.20,resulting inreactivities farbelowthe0.95limit.Hence,postulated accidents inthefuelhandlingsystemareoflittleconcernfromacriticality safetystandpoint.
Basedontheforegoing discussion, itisconcludedthatthefuelelevatorupenderandtransfertubewillmeetthesafetycriterialimitofkeff<0.95.
ATTACHMENT 3DETERMINATION OFNOSIGNIFICANT HAZARDSCONSIDERATION Thestandards usedtoarriveatadetermination thatarequestforamendment involvesnosignificant hazardsconsideration areincludedintheCommission's regulations, IOCFR50.92,whichstatesthatnosignificant hazardsconsiderations areinvolvediftheoperation ofthefacilityinaccordance withtheproposedamendment wouldnot(I)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated; or(2)createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated; or(3)involveasignificant reduction inamarginofsafety.Eachstandardisdiscussed asfollows:(I)Operation ofthefacilityinaccordance withtheproposedamendment wouldnotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.
FPLhasidentified afuelassemblydropasapotential accidentscenariowhoseconsequences wouldbeaffectedbytheproposedchange.Forthistypeofaccident, thecriticality acceptance criterion isnotviolated.
Basedontheabove,itisconcluded thattheproposedamendment willnotresultinanincreaseoftheprobability orconsequences ofaccidents previously evaluated.
(2)Vseofthemodifiedspecification wouldnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.
Therequested changedoesnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated becausetheplantconfiguration andthemannerinwhichitisoperatedremainthesame.Theproposedchangedoesnotconstitute anychangeintheprocedures forplantoperation orhardware.
Inaddition, FPLhasevaluated theproposedtechnical specification changesinaccordance withtheappropriate IndustryCodesandStandards and,basedonthisevaluation, FPLfindsthattheproposedtechnical specif'ication changedoesnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.
(3)Vseofthemodifiedspecification wouldnotinvolveasignificant reduction inamarginofsafety.Theproposedchangedoesnotinvolveasignificant reduction inamarginofsafety.Thenewfuelstoragerackcalculated keffof0.974(95%confidence level)islowerthantheestablished acceptance criteriaof<0.98keff.The0.929keff(95%confidence level)calculated forthefuelhandlingstructures isalsoconsiderably lowerthantheestablished acceptance criteriaof<0.95keff.Theabovecalculated neutronmultiplication factorsincludeallthenecessary biasesanduncertainties.
Asnotedabove,therequiredacceptance criteria(<0.98keffunderoptimunmoderation conditions and0.95underfullyfloodedconditions forthenewfuelstorageracks,and<0.95keffforthefuelhandlingstructures) havebeenadheredtointhecriticality analysisperformed insupportofthisproposedtechnical specification change.Specifically, theEJW4/0I7/5 4I4IIII'lIIIl4,4II\~FI4~II'W,tliIIII'4IgI44JrII4,~4II'I4~IIlII4FW~\'I4IIgtkll4'.FhI,IWIhIt4~l.I~IF44444,I4hlhtt,r4~~1444'4I'IIIIIII44IFW4I41IIWIII)'4I,4I~I~I4IW41Nh'WI4'I~I4I4'III~IWII~'uI'4'~4IIhflI411444I4'Im1'll-'.I*I 0.02keffand0.05keffcriticality marginofsafetyrequiredforthenewfuelstorageareaunderoptimummoderation andfullyfloodedconditions respectively, and0.05keffcriticality marginofsafetyrequiredforthefuelhandlingstructures havebeenmaintained.
Basedonthepreviousdiscussion, theproposedamendment toincreasetheallowable fuelU-235enrichment inthenewfuelstorageracksandfuelhandlingequipment willnotinvolveasignificant reduction inamarginofsafety.Basedontheabove,'we havedetermined thattheamendment requestdoesnot(l)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated, (2)createtheprobability ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated, or(3)involveasignificant reduction inamarginofsafety;andtherefore doesnotinvolveasignificant hazardsconsideration.
EJWO/0I7/6 0p=<<I<<4i,<<l,<<UIII-<<~I4fl4>>I,,II4fIi~ffIfU<<ILI4~.4I4<<I<<~il~<<.4<<~4"~~'I.I,4,~<<44U'i''f4444Ul~''4II<<4<<<<~4il<<4<<"<<<<~ikll4L.~~3<<-<<<<
APPENOIX1 1/Iy~f}}
APPENOIX1 1/Iy~f}}

Revision as of 16:47, 29 June 2018

Proposed Tech Specs Increasing Enrichment Spec of New Fuel Storage Rack to 4.5 Weight Percent (W/O) U-235
ML17221A587
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 01/20/1988
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17221A586 List:
References
NUDOCS 8801270014
Download: ML17221A587 (13)


Text

ATTACHMENT IMarked-up Technical Specification PageSt.LucieUnitl5-68801270014 8003pDRADOCN,0500@DR'P-EJW4/0I7/3 0~e.SlgShIM4gI13*~

~~I~~~,~~~~~~~~I~IetI~~~~~~~~~~~~'~~~'.~~II~~II~~~~l-~i~~~~~~~)~~sI~~~~~~I,~~~I~'~~I~~~I~~~~~,~~~~~~~~~~~~~~~~~~II~I'I~II~~~~i'ii~I~~~~~~~I~~i~~~~~~~~~~i~~~I t

ATTACHMENT 2SAFETYEVALUATlON EJWOIOi7/e SAFETYEVALUATION BackroundThecurrently licensedfuelenrichment limitatSt.LucieUnitIfortheexistingnewfuelstorageracks,spentfuelracksandfuelhandlingstructures is40w/oU235.FloridaPowerandLightCompany(FPL)hassubmitted aproposedlicenseamendment insupportofre-racking theUnitIspentfuelpoolwithhighdensitystorageracks(FPLletterL-87-245, datedJune12,1987).Thatsubmittal addresses therequiredanalysis, i.e.,criticality, thermalhydraulic, seismic,etc.insupportofreplacing theexistingspentfuelracks.Thecriticality analysisinthere-racksubmittal supportsanenrichment limitof4.5w/oU-235forthehighdensityspentfuelracks.Thecriticality analysisfortheexistingnewfuelstorageracksandfuelhandlingequipment (Appendix I)wasperformed separately fromthere-rackanalysis.

Thissubmittal supportsincreasing theenrichment specification ofthenewfuelstorageracktechnical specification (5.6.1.b) to4.5w/O'-235.

FPLisrequesting toincreasethemaximumenrichment specification ofthenewfuelstoragerackCriticality Technical Specification (5.6.1..b) atSt.LucieUnitIto<4.5w/oU-235.Thisproposedchangeallowsincreased flexi6ility infuelmanagement andaccommodates storageofhigherenrichments forpossibleuseinfuture'cycles.SafetEvaluation Theanalysisoftheproposedincreaseinfuelenrichment hasbeenaccomplished usingcurrently acceptedcodesandstandards asspecified intheSafetyAnalysisReport.Calculations performed forthehandlingandstorage(newfuelracks)of4.5w/oU-235enrichedfuelassemblies demonstrate thattheapplicable criticality acceptance criteriaaremet.Calculations performed forthenewfuelstorageracksatvariousdegreesofmoderation, including fullflooding, indicatethatthelimitingkeffoccursforamoderator voidfractionof0.91andhasavalueof0.974atthe95Kconfidence level.Thisvalueislowerthanthesafetycriterialimitof0.98quotedintheapplicable standards fornewfuelstorageracksunderoptimummoderation conditions.

Criticality ca1culationswerealsoperformed forthefuelhandlingstructures (fuelelevator, upenderandtransfertube)atapoolwatertemperature of68oF.Themostreactivesituation duringnormalfuelhandlingoperations wasconservatively assumed

'tooccurwhentwoassemblies arelocated4inchesedgetoedgefromeachother.Theresulting kefffromthisscenariois0.929atthe95Kconfidence level.Forpostulated accidents suchashavingtwoassemblies byaccidentachieveabundletobundlespacingoflessthan4inches,creditmaybetakenforrealistic poolconditions.

Theseconditions includetakingcreditforsolubleboron(>1720ppm)presentinthepoolwater.Atthisboronconcentration, thekeffisreducedbyapproximately 0.20,resulting inreactivities farbelowthe0.95limit.Hence,postulated accidents inthefuelhandlingsystemareoflittleconcernfromacriticality safetystandpoint.

Basedontheforegoing discussion, itisconcludedthatthefuelelevatorupenderandtransfertubewillmeetthesafetycriterialimitofkeff<0.95.

ATTACHMENT 3DETERMINATION OFNOSIGNIFICANT HAZARDSCONSIDERATION Thestandards usedtoarriveatadetermination thatarequestforamendment involvesnosignificant hazardsconsideration areincludedintheCommission's regulations, IOCFR50.92,whichstatesthatnosignificant hazardsconsiderations areinvolvediftheoperation ofthefacilityinaccordance withtheproposedamendment wouldnot(I)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated; or(2)createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated; or(3)involveasignificant reduction inamarginofsafety.Eachstandardisdiscussed asfollows:(I)Operation ofthefacilityinaccordance withtheproposedamendment wouldnotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.

FPLhasidentified afuelassemblydropasapotential accidentscenariowhoseconsequences wouldbeaffectedbytheproposedchange.Forthistypeofaccident, thecriticality acceptance criterion isnotviolated.

Basedontheabove,itisconcluded thattheproposedamendment willnotresultinanincreaseoftheprobability orconsequences ofaccidents previously evaluated.

(2)Vseofthemodifiedspecification wouldnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.

Therequested changedoesnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated becausetheplantconfiguration andthemannerinwhichitisoperatedremainthesame.Theproposedchangedoesnotconstitute anychangeintheprocedures forplantoperation orhardware.

Inaddition, FPLhasevaluated theproposedtechnical specification changesinaccordance withtheappropriate IndustryCodesandStandards and,basedonthisevaluation, FPLfindsthattheproposedtechnical specif'ication changedoesnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.

(3)Vseofthemodifiedspecification wouldnotinvolveasignificant reduction inamarginofsafety.Theproposedchangedoesnotinvolveasignificant reduction inamarginofsafety.Thenewfuelstoragerackcalculated keffof0.974(95%confidence level)islowerthantheestablished acceptance criteriaof<0.98keff.The0.929keff(95%confidence level)calculated forthefuelhandlingstructures isalsoconsiderably lowerthantheestablished acceptance criteriaof<0.95keff.Theabovecalculated neutronmultiplication factorsincludeallthenecessary biasesanduncertainties.

Asnotedabove,therequiredacceptance criteria(<0.98keffunderoptimunmoderation conditions and0.95underfullyfloodedconditions forthenewfuelstorageracks,and<0.95keffforthefuelhandlingstructures) havebeenadheredtointhecriticality analysisperformed insupportofthisproposedtechnical specification change.Specifically, theEJW4/0I7/5 4I4IIII'lIIIl4,4II\~FI4~II'W,tliIIII'4IgI44JrII4,~4II'I4~IIlII4FW~\'I4IIgtkll4'.FhI,IWIhIt4~l.I~IF44444,I4hlhtt,r4~~1444'4I'IIIIIII44IFW4I41IIWIII)'4I,4I~I~I4IW41Nh'WI4'I~I4I4'III~IWII~'uI'4'~4IIhflI411444I4'Im1'll-'.I*I 0.02keffand0.05keffcriticality marginofsafetyrequiredforthenewfuelstorageareaunderoptimummoderation andfullyfloodedconditions respectively, and0.05keffcriticality marginofsafetyrequiredforthefuelhandlingstructures havebeenmaintained.

Basedonthepreviousdiscussion, theproposedamendment toincreasetheallowable fuelU-235enrichment inthenewfuelstorageracksandfuelhandlingequipment willnotinvolveasignificant reduction inamarginofsafety.Basedontheabove,'we havedetermined thattheamendment requestdoesnot(l)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated, (2)createtheprobability ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated, or(3)involveasignificant reduction inamarginofsafety;andtherefore doesnotinvolveasignificant hazardsconsideration.

EJWO/0I7/6 0p=<<I<<4i,<<l,<<UIII-<<~I4fl4>>I,,II4fIi~ffIfU<<ILI4~.4I4<<I<<~il~<<.4<<~4"~~'I.I,4,~<<44U'if4444Ul~4II<<4<<<<~4il<<4<<"<<<<~ikll4L.~~3<<-<<<<

APPENOIX1 1/Iy~f