ML17335A358
| ML17335A358 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 12/03/1998 |
| From: | INDIANA MICHIGAN POWER CO. |
| To: | |
| Shared Package | |
| ML17335A357 | List: |
| References | |
| NUDOCS 9812080046 | |
| Download: ML17335A358 (27) | |
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ATTACHMENT2ATOAEP:NRC:09000TECHNICALSPECIFICATIONSPAGESMARKEDTOSHOWPROPOSEDCHANGESREVISEDPAGESUNIT13/46-27B3/46-4'P8i208004b98i203PDR 3/4LIMITINGCONDITIONSFOROPERATIONANDSURVEILLANCEREQUIREMENTS3/4.6CONTAINMENTSYSTEMSSURVEILLANCEREUIREMENTSContinued4tD'aEO'ostgCd)C4OQCJ4C5OOOo~gyOcrtclstggO~O~rnCtgsts~Q~styOBBca3.48gW4E0gigQtshallbeconstitutedofonebasketeachfromRadialRowsI,2,4,6,8and9(orfromthesamerowofanadjacentbayifabasketfromadesignatedrowcannotbeobtainedforweighing)withineachbay.Ifanybasketisfoundtocontainlessthan1333poundsofice,arepresentativesampleof20additionalbasketsfromthesamebayshallbcweighed.Theminimumaverageweightoficefromthe20additionalbasketsandthediscrepantbasketshallnotbeless,than1333pounds/basketata95%levelofconfidence.Theicccondensershallalsobesubdividedinto3groupsofbaskets,asfollows:Group1-baysIthrough8,Group2-bays9through16,andGroup3-bays17through24.TheminimumaverageiceweightofthesamplebasketsfromRadialRowsI,2,4,6,8and9ineachgroupshallnotbelessthan1333pounds/basketata95%levelofconfidence.Theminimumtotalicecondensericcweightata95%levelofconfidenceshallbecalculatedusingallicebasketweightsdeterminedduringthisweighingprogramandshallnotbclessthan2,590,000pounds.+gVerifying,byavisualinspectionofatieastinvefioutAptutsegeepericecondenserbay,thattheaccumulationoffrostoriceonflowbetweenicebasketsandpastlatticeramesisrestricttoanommalthicknessof3/8inches.Ifonefiow+ssage-perbayisfoundtohaveanaccumulationoffrostoricegreaterthanthisthickness,arepresentativesampleof20additionalfloromthesame++bayshallbevisuallyinspected.IftheseadditionalflowIaesagesarefoundacceptable,thcsurveillanceprogrammayproceedconsideringthesingl'cdeficiencyasuniqueandacceptable.MorethanonerestrictedflowpaseegggperbayisevidenceofabnormaldegradationAtleastonceper40monthsbyliftingandvisuallyinspectingtheaccessibleportionsofatleasttwoicebasketsfromeach1/3oftheicecondenserandverifyingthattheicebasketsarefreeofdetrimentalstructuralwear,cracks,corrosionorotherdamage.Theicebasketsshallberaisedatleast12feetforthisinspection.Atleastonceper18monthsbyverifying,byavisualinspection,ofeachicecondenserbay,thattheaccumulationoffrostoriceonthelowerplenumsupportstr'uctures~tunungvane'srestrictedtoanominalthicknessof3/8inches.Anaccumulationoffrostoricegreaterthanthisthicknessisevidenceofabnormaldegradationoftheicecondenser.andwillrequirea100%inspectionofthatbaytodetermine,bycalculation,thatthctotalflowpassageblockageislessthanthe15%assumedintheanalysisoflowersubcompartmentpressurizationfollowinga,LOCAorMSLB.Gys&rswK/44ghw~~a/~COOKNUCLEARPLANT-UNIT1Page3/46-27AMENDMENT408,AQUA,438,444,220 3/4BASES3/4.6CONTAINMENTSYSTEMS'3/4.6.5'ICECONDENSERTherequirementsassociatedwitheachofthecomponentsoftheicecondenserensurethattheoverallsystemwillbeavailabletoprovidesufficientpressuresuppressioncapabilitytolimitthecontainmentpeakpressuretransienttolessthanl2psigduringLOCAconditions.3/4.6.5.1ICEBEDTheOPERABILITYoftheicebedensuresthattherequirediceinventorywillI)bedistributedevenlythroughthecontainmentbays,2)containsufficientborontoprecludedilutionofthecontaininentsumpfollowingtheLOCAand3)containsufficientheatremovalcapabilitytocondensethereactorsystemvolumereleasedduringaLOCA.Theseconditionsareconsistentwiththeassumptionsusedintheaccidentanalyses.Theminimumweightfigureof1333poundsoficeperbasketcontainsa5%conservativeallowanceforicelossthroughsublimation.Intheeventthatobservedsublimationratesareequaltoorlowerthandesignpredictionsafterthreeyearsofoperation,theminimumicebasketsweightmaybeadjusteddownward.Inaddition,thenumberoficebasketsrequiredtobeweighedeach18monthsmaybereducedafter3yearsofoperationifsuchareductionissupportedbyobservedsublimationdata.3/4.6.5.2ICEBEDTEMPERATUREMONITORINGSYSTEMTheOPERABILITYoftheicebedtemperaturemonitoringsystemensuresthatthecapabilityisavailableformonitoringtheicetemperature.Intheeventthemonitoringsystemisinoperable,theACTIONrequirementsprovideassurancethattheicebedheatremovalcapacitywillberetainedwithinthespecifiedtimelimits.COOKNUCLEARPLANT-UNITIPageB3/4&4AMENDMENT480,220
INSERTFORPAGEB3/46-4(Unit1)\Thecontainmentsub-compartmentanalysesassumesa15%blockagethroughouttheicecondenserflowpaths.Theminimumicecondenserflowareathrougheachbayoccursatthelatticeframesupportelevations,andincludesthenetopenareaatthesesupportelevations.Thisincludestheflowarealeftbetweenthecranewallandthecontainmentwallinsidesurfaces,aftersubtractingouttheareasfortheicecondenserequipmentatthatelevation,thatincludesicebasketsfullofice,latticeframe,latticeframecolumns,wallpanelairductsandwallpanelcradlesandotherappurtenances.Insummary,aflowchannelconsistsoftheannularareaoutsideofeachbasketandone-halfofthetriangularareasformedbythelatticesupportsbetweenbaskets,suchthatthesumoftheseareasaroundeachbasketequalsthetotalflowareainthebay.Flowchannelsinradialrowsoneandnineincludetheareabetweenthebasketandthecontainmentandcranewallrespectively.Thereareatotalof81flowchannelsineachbay-onepericebasket.Theselectionofoneflowchanneleachfromradialrows1and9assuresthattheinspectionshouldincludethoseareaswhere,basedonexperience,itisexpectedtoseefrostbuild-upfirst.The3/8"frostoriceaccumulationinaflowchannelcriterionprovidesonlyanindicatoroficecondensercondition.Thelatticeframethicknessis3/8",andtherefore,thisdimensionprovidesaconvenientvisualreferenceduringflowchannelinspections.Frostoricebuildupinexcessof3/8"shallbeevaluatedbyselectingafurtherrepresentativesampleof20flowchannelsthatspiraloutwardfromtheaffectedflowchannel.Thissamplepopulationassuresthattheareasaroundandadjacenttotheblockedchannelarealsoinspected.Morethanonerestrictedflowchannelperbayrequiresa100%inspectionofthebayandcalculationtoensurethatthe15%blockagelimitismet.Becausetheminimumicecondenserflowareaineachicecondenserbayoccursatthelatticeframesupportelevations,theinspectionofthelowerinletplenumsupportstructuresandturningvanes,topdeckfloorgratingandintermediatedeckalsoprovidesonlyanindicatoroftheoverallicecondensercondition.The3/8"thicknesscriterionprovidesathresholdtoprovidereasonableassurancethatanyfrostoricebuildupiscorrectedwellbeforethe15%blockageassumptionisapproachedintheseareas.
ATTACHMENT2BTOAEP:NRC:09000TECHNICALSPECIFICATIONSPAGESMARKEDTOSHOWPROPOSEDCHANGESREVISEDPAGESUNIT2
3/4LIMITINGCONDITIONSFOROPERATIONANDSURVEILLANCEREQUIREMENTS3/4.6CONTAINMENTSYSTEMSSURVEILLANCEREUlREMENTSContinued4'OtDCO'OCtgCOCOOO'aOOOOCtgOOjlyVlOQ~CtoCO~cnCtgcntnOtyP.Cc,shallbeconstitutedofonebasketeachfromRadialRows1,2,4,6,8and9(orfromthesamerowofanadjacentbayifabasketfromadesignatedrowcannotbeobtainedforweighing)withineachbay.Ifanybasketisfoundtocontainlessthan1333poundsofice,arepresentativesampleof20additionalbasketsfromthesamebayshallbeweighed.Theminimumaverageweightoficefromthe20additionalbasketsandthediscrepantbasketshallnotbelessthan1333pounds/ba'sketata95%levelofconfidence.Theicecondensershallalsobesubdividedinto3groupsofbaskets,asfollows:Group1-bays1through8,Group2-bays9through16,andGroup3-bays17through24.TheminimumaverageiceweightofthesamplebasketsfromRadialRows1,2,4,6,8and9ineachgroupshallnotbelessthan1333pounds/basketata95%levelofconfidence.3.Theminimumtotalicecondensericeweightata95%levelofconfidenceshallbecalculatedusingallicebasketweightsdeterminedduringthisweighingprogramandshallnotbelessthan2,590,000pounds.Verifying,byavisualinspectionofatteastjttwetlowgpassegeepericecondenserbay,thattheaccumulationoffrostoriceonflowbetweenicebasketsandpastlatticeramesisrestricttoanoaunalicknessof3/8mches.Ifoneflowjgssage-perbayisfoundtohaveanaccumulationof.frostoricegreaterthanthisthickness,arepresentativesampleof20additionalfloromthesamebayshalbevisu~lyinspect~.Iftheseaddition~flow~mmearefoundacceptable,thesurveillanceprogrammayproceedconsideringthesingledeficiencyasuniqueandacceptable.MorethanonerestrictedflowpassageperbayisevidenceofabnormaldegradationAtleastonceper40monthsbyliftingandvisuallyinspectingtheaccessibleportionsofatleasttwoicebasketsfromeach1/3oftheicecondenserandverifyingthattheicebasketsarefreeofdetrimentalstructuralwear,cracks,corrosionorotherdamage.Theicebasketsshallberaisedatleast12feetforthisinspection.Atleastonceper18monthsbyverifying,byavisualinspection,ofeachicecondenserbay,thattheaccumulationoffrostoriceonthelowerplenumsupportstiucturesandgturnmgvan'srestrictedtoanominalthicknessof3/8inches.Anaccumulationoffrostoricegreaterthanthisthicknessisevidenceofabnormaldegradationoftheicecondenser.andwillrequirea100%inspectionofthatbaytodetermine,bycalculation,thatthetotalflowpassageblockageislessthanthe15%assumedintheanalysisoflowersubcompartmentpressurizationfollowingaLOCAorMSLB.vV&tlapnate,/Q44Cj~nna/XCOOKNUCLEARPLANT-UNIT2Page3/46-36AMENDMENTQO,42$,204 3/4BASES3/4.6CONTAINMENTSYSTEMS3/4.6.4COMBUSTIBLEGASCONTROL'L~TheOPERABILITYoftheequipmentandsystemsrequiredforthedetectionandcontrolofhydrogengasensuresthatthisequipmentwillbeavailabletomaintainthehydrogenconcentrationwithincontainmentbelowitsflammablelimitduringpost-LOCAconditions.Eitherrecombinerunitiscapableofcontrollingtheexpectedhydrogengenerationassociatedwith:I)'zirconium-waterreactions;2)radiolyticdecompositionofwater;and3)corrosionofmetalswithincontainment.ThesehydrogencontrolsystemsareconsistentwiththerecommendationsofRegulatoryGuide1.7,"ControlofCombustibleGasConcentrationsinContainmentFollowingaLOCA,"March1971.Theacceptancecriterionof10,000ohmsisbasedonthetestbeingperformedwiththeheaterelementatanambienttemperature,butcanbeconservativelyappliedwhentheheaterelementisatatemperatureaboveambient.3/4.6.5ICECONDENSERTherequirementsassociatedwitheachofthecomponentsoftheicecondenserensurethattheoverallsystemwillbeavailabletoprovidesufficientpressuresuppressioncapabilitytolimitthecontainmentpeakprcssuretransienttolessthan12psigduringLOCAconditions.3/4.6.5.1ICEBEDTheOPERABILITYoftheicebedensuresthattherequirediceinventorywillI)bedistributedevenlythroughthecontainmentbays,2)containsufficientborontoprecludedilutionofthecontainmentsumpfollowingtheLOCAand3)containsufficientheatremovalcapabilitytocondensethereactorsystemvolumereleasedduringaLOCA.Theseconditionsareconsistentwiththeassumptionsusedintheaccidentanalyses.Theminimumweightfigureof1333poundsof,iceperbasketcontainsa5%conservativeallowanceforicelossthroughsublimation.Intheeventthatobservedsublimationratesareequaltoorlowerthandesignpredictionsafterthreeyearsofoperation,theminimumicebasketsweightmaybeadjusteddownward.Inaddition,thenumberoficebasketsrequiredtobeweighedeach18monthsmaybereducedafter3yearsofoperationifsuchareductionissupportedbyobservedsublimationdata.3/4.6.5.2ICEBEDTEMPERATUREMONITORINGSYSTEMTheOPERABILITYoftheicebedtemperaturemonitoringsystemensuresthatthecapabilityisavailableformonitoringtheicetemperature.Intheeventthemonitoringsystemisinoperable,theACTIONrequirementsprovideassurancethattheicebedheatremovalcapacitywillberetainedwithinthespecifiedtimelimits.COOKNUCLEARPLANT-UNIT2PageB3/464AMENDMENT4,444,104,207 INSERTFORPAGEB3/46-4(Unit2)lThecontainmentsub-compartmentanalysesassumesa15%blockagethroughouttheicecondenserflowpaths.Theminimumicecondenserflowareathrougheachbayoccursatthelatticeframesupportelevations,andincludesthenetopenareaatthesesupportelevations.Thisincludestheflowarealeftbetweenthecranewallandthecontainmentwallinsidesurfaces,aftersubtractingouttheareasfortheicecondenserequipmentatthatele'vation,thatincludesicebasketsfullofice,latticeframe,latticeframecolumns,wallpanelairductsandwallpanelcradlesandotherappurtenances.Insummary,aflowchannelconsistsoftheannularareaoutsideofeachbasketandone-halfofthetriangularareasformedbythelatticesupportsbetweenbaskets,suchthatthesumoftheseareasaroundeachbasketequalsthetotalflowareainthebay.Flowchannelsinradialrowsoneandnineincludetheareabetweenthebasketandthecontainmentandcranewallrespectively.Thereareatotalof81flowchannelsineachbay-onepericebasket.Theselectionofoneflowchanneleach,fromradialrows1and9assuresthattheinspectionshouldincludethoseareaswhere,basedonexperience,itisexpectedtoseefrostbuild-upfirst.The3/8"frostoriceaccumulationinaflowchannelcriterionprovidesonlyanindicatoroficecondensercondition.Thelatticeframethicknessis3/8",andtherefore,thisdimensionprovidesaconvenientvisualreferenceduringflowchannelinspections.Frostoricebuildupinexcessof3/8"shallbeevaluatedfurtherbyselectingafurtherrepresentativesampleof20flowchannelsthatspiraloutwardfromtheaffectedflowchannel.Thissamplepopulationassuresthattheareasaroundandadjacenttotheblockedchannelarealsoinspected.Morethanonerestrictedflowchannelperbayrequiresa100%inspectionofthebayandcalculationtoensurethatthe15%blockagelimitismet.Becausetheminimumicecondenserflowareaineachicecondenserbayoccursatthelatticeframesupportelevations,.theinspectionofthelowerinletplenumsupportstructuresandturningvanes,topdeckfloorgratingandintermediatedeckalsoprovidesonlyanindicatoroftheoverallicecondensercondition.The3/8"thicknesscriterionprovidesathresholdtoensurethatanyfrostoricebuildupiscorrectedwellbeforethe15%blockageassumptionisapproachedintheseareas.
ATTACHMENT3ATOAEP:NRC:09000PROPOSEDTECHNICALSPECIFICATIONSPAGESREVISEDPAGESUNIT1 3/4LIMITINGCONDITIONSFOROPERATIONANDSURVEILLANCEREQUIRIMENTS3/4.6CONTAINMENTSYSTEMSSurveillance.ReuirementsContinuedshallbeconstitutedofonebasketeachfromRadialRows1,2,4,6,8and9(orfromthesamerowofanadjacentbayifabasketfromadesignatedrowcannotbeobtainedforweighing)withineachbay.Ifanybasketisfoundtocontainlessthan1333poundsofice,arepresentativesampleof20additionalbasketsfromthesamebayshallbeweighed.Theminimumaverageweightoficefromthe20additionalbasketsandthediscrepantbasketshallnotbelessthan1333pounds/basketata95%levelofconfidence.Theicecondensershallalsobesubdividedinto3groupsofbaskets,asfollows:Group1-bays1through8,Group2-bays9through16,andGroup3-bays17through24.TheminimumaverageiceweightofthesamplebasketsfromRadialRows1,2,4,6,8and9ineachgroupshallnotbelessthan1333pounds/basketata95%levelofconfidence.Theminimumtotalicecondensericeweightata95%levelofconfidenceshallbecalculatedusingallicebasketweightsdeterminedduringthisweighingprogramandshallnotbelessthan2,590,000pounds.Verifying,byavisualinspectionofatleastfourflowchannelspericecondenserbay,thattheaccumulationoffrostoriceonflowchannelsbetweenicebasketsandpastlatticeframesisrestrictedtoanominalthicknessof3/8inches.Flowchannelswillbeselectedasfollows:twoatrandomfromradialrows2through8andoneeachfromradialrows1and9.Ifoneflowchannelperbayisfoundtohaveanaccumulationoffrostoricegreaterthanthisthickness,arepresentativesampleof20additionalflowchannelsfromthesamebayshallbevisuallyinspected.Iftheseadditionalflowchannelsarefoundacceptable,thesurveillanceprogrammayproceedconsideringthesingledeficiencyasuniqueandacceptable.Morethanonerestrictedflowchannelperbayisevidenceofabnormaldegradationandwillrequirea100%inspectionofthatbaytodetermine,bycalculation,thatthetotalflowpassageblockageislessthanthe15%assumedintheanalysisoflowersubcompartmentpressurizationfollowingaLOCAorMSLB.Atleastonceper18monthsbyverifying,byavisualinspection,ofeachicecondenserbay,thattheaccumulationoffrostoriceonthelowerinletplenumsupportstructuresandtamingcanes,onthetopdeckfloorgratingandontheintermediatedeck,isrmtrictedtoanominalthicknessof3/8inches.Anaccumulationoffrostandicegreaterthanthisthicknessisevidenceofabnormaldegradationoftheicecondenser.Atleastonceper40monthsbyliftingaridvisuallyinspectingtheaccessibleportionsofatleasttwoicebasketsfromeach1/3oftheicecondenserandverifyingthattheicebasketsarefreeofdetrimentalstructuralwear,cracks,corrosionorotherdamage.Theicebasketsshallberaisedatleast12feetforthisinspection.COOKNUCLEARPLANT-UNIT1Page3/46-27AMENDMENT408,4Skp488,444p220 lW44AI'sIl 3/4BASES3/4,6CONTAINMENTSYSTEMS3/4,6.5ICE.CONDENSERTherequirementsassociatedwitheachofthecomponentsoftheicecondenserensurethattheoverallsystemwillbeavailabletoprovidesufficientpressuresuppressioncapabilitytolimitthecontainmentpeakpressuretransienttolessthan12psigduringLOCAconditions.3/4.6.5.1ICEBEDTheOPERABILITYoftheicebedensuresthattherequirediceinventorywill1)bedistributedevenlythroughthecontainmentbays,2)containsufficientborontoprecludedilutionofthecontainmentsumpfollowingtheLOCAand3)containsufficientheatremovalcapabilitytocondensethereactorsystemvolumereleasedduringaLOCA.Theseconditionsareconsistentwiththeassumptionsusedintheaccidentanalyses.Theminimumweightfigureof1333poundsoficeperbasketcontainsa5%conservativeallowanceforicelossthroughsublimation.Intheeventthatobservedsublimationratesareequaltoorlowerthandesignpredictionsafterthreeyearsofoperation,theminimumicebasketsweightmaybeadjusteddownward.Inaddition,thenumberoficebasketsrequiredtobeweighedeach18monthsmaybereducedafter3yearsofoperationifsuchareductionissupportedbyobservedsublimationdata.Thecontainmentsub-compartmentanalysisassumesa15%blockagethroughouttheicecondenserflowpaths.Theminimumicecondenserflowareathrougheachbayoccursatthelatticeframesupportelevations,andincludesthenetopenareaatthesesupportelevations.Thisincludesthefiowarealeftbetweenthecranewallandthecoritainmentwallinsidesurfaces,aftersubtractingouttheareasfortheicecondenserequipmentatthatelevation,thatincludesicebasketsfullofice,latticeframe,latticeframecolumns,wallpanelairductsandwallpanelcradlesandotherappurtenances.Insummary,aflowchannelconsistsoftheannularareaoutsideofeachbasketandone-halfofthetriangularareasformedbythelatticesupportsbetweenbaskets,suchthatthesumoftheseareasaroundeachbasketequalsthetotalfiowareainthebay.Flowchannelsinradialrowsoneandnineincludetheareabetweenthebasketandthecontainmentandcranewallrespectively.Thereareatotalof81flowchannelsineachbay-onepericebasket.Theselectionofoneflowchanneleachfromradialrows1and9assuresthattheinspectionshouldincludethoseareaswhere,basedonexperience,itisexpectedtoseefrostbuild-upfirst.The3/8"criterionforfrostoriceaccumulationinaflowchannelprovidesonlyanindicatoroficecondensercondition.Thelatticeframethicknessis3/8"and,therefore,thisdimensionprovidesaconvenientvisualreferenceduringflowchannelinspections.Frostoricebuild-upinexcessof3/8"shallbeevaluatedfurtherbyselectingarepresentativesampleof20flowchannelsthatspiraloutwardfromtheaffectedfiowchannel.Thissamplepopulationassuresthattheareasaroundandadjacenttotheblockedchannelarealsoinspected.Morethanonerestrictedflowchannelperbayrequiresa100%inspectionofthebayandcalculationtoensurethatthe15%blockagelimitismet.Becausetheminimumicecondenserfiowareaineachicecondenserbayoccursatthelatticeframesupportelevations,theinspectionofthelowerinletplenumsupportstructuresandturningvancs,topdeckfloorgratingandintermediatedeckalsoprovidesonlyanindicatoroftheoverallicecondensercondition.The3/8"thicknesscriterionprovidesathresholdtoensurethatanyfrostoricebuildupiscorrectedwellbeforethe15%blockageassumptionisapproachedintheseareas.3/4.6.5.2ICEBEDTEMPERATUREMONITORINGSYSTEMTheOPERABILITYoftheicebedtemperaturemonitoringsystemensuresthatthecapabilityisavailableformonitoringtheicetemperature.Intheeventthemonitoringsystemisinoperable,theACTIONrequirementsprovideassurancethattheicebedheatremovalcapacitywillberetainedwithinthespecifiedtimelimits.COOKNUCLEARPLANT-UNITIPageB3/464AMENDMENT480,RRO ATTACHMENT3BTOAEP:NRC:09000PROPOSEDTECHNICALSPECIFICATIONSPAGESREVISEDPAGESUNIT2 43/4LIMITINGCONDITIONSFOROPERATIONANDSURVEILLANCEREQUIREMENTS3/4.6CONTAINMENTSYSTEMSSURVEILLANCEREUIREMENTSContinuedshallbeconstitutedofonebasketeachfromRadialRows1,2,4,6,8and9(orfromthesamerowofanadjacentbayifabasketfromadesignatedrowcannotbeobtainedforweighing)withineachbay.Ifanybasketisfoundtocontainlessthan1333poundsofice,arepresentativesampleof20additionalbasketsfromthesamebayshallbeweighed.Theminimumaverageweightoficefromthe20additionalbasketsandthediscrepantbasketshallnotbelessthan1333pounds/basketata95%levelofconfidence.Theicecondensershallalsobesubdividedinto3groupsofbaskets,asfollows:Group1-bays1through8,Group2-bays9through16,andGroup3-bays17through24.TheminimumaverageiceweightofthesamplebasketsfromRadialRows1,2,4,6,8and9ineachgroupshallnotbelessthan1333pounds/basketata95%levelofconfidence.Theminimumtotalicecondensericeweightata95%levelofconfidenceshallbecalculatedusingallice'basketweightsdeterminedduringthisweighingprogramandshallnotbelessthan2,590,000pounds.Verifying,byavisualinspectionofatleastfourflowchannelspericecondenserbay,thattheaccumulationoffrostoriceonflowchannelsbetweenicebasketsandpastlatticeframesisrestrictedtoanominalthicknessof3/8inches.Flowchannelswillbeselectedasfollows:twoatrandomfromradialrows2through8andoneeachfromradialrows1and9.Ifoneflowchannelperbayisfoundtohaveanaccumulationoffrostoricegreaterthanthisthickness,arepresentativesampleof20additionalfiowchannelsfromthesamebayshallbevisuallyinspected.Iftheseadditionalflowchannelsarefoundacceptable,thesurveillanceprogrammayproceedconsideringthesingledeficiencyasuniqueandacceptable.Morethanonerestrictedflowchannelperbayisevidenceofabnormaldegradationandwillrequirea100%inspectionofthatbaytodetermine,bycalculation,.thatthetotalflowpassageblockageislessthanthe15%assumedintheanalysisoflowersubcompartmentpressurizationfollowingaLOCAorMSLB.Atleastonceper18monthsbyverifying,byavisualinspection,ofeachicecondenserbay,thattheaccumulationoffrostoriceonthelowerplenumsupportstructuresandturningvanes,onthetopdeckfloorgratingandontheintermediatedeck,isrestrictedtoanominalthicknessof3/8inches.Anaccumulationoffrostoricegreaterthanthisthicknessisevidenceofabnormaldegradationoftheicecondenser.Atleastonceper40monthsbyliftingandvisuallyinspectingtheaccessibleportionsofatleasttwoicebasketsfromeach1/3oftheicecondenserandverifyingthattheicebasketsarefreeofdetrimentalstructuralwear,cracks,corrosionorotherdamage.Theicebasketsshallberaisedatleast12feetforthisinspection.COOKNUCLEARPLANT-UNIT2Page3/46-36AMENDMENT90,485,%4 3/4BASES3/4.6CONTAINMENTSYSTEMS3/4:6.4COMBUSTIBLEGASCONTROLTheOPERABILITYoftheequipmentandsystemsrequiredforthedetectionandcontrolofhydrogengasensuresthatthisequipmentwillbeavailabletomaintainthehydrogenconcentrationwithincontainmentbelowitsflammablelimitduringpost-LOCAconditions.Eitherrecombinerunitiscapableofcontrollingtheexpectedhydrogengenerationassociatedwith1)zirconium-waterreactions,2)radiolyticdecompositionofwaterand3)corrosionofmetalswithincontainment.ThesehydrogencontrolsystemsareconsistentwiththerecommendationsofRegulatoryGuide1.7,"ControlofCombustibleGasConcentrationsinContainmentFollowingaLOCA,"March1971.3/4.6.5ICECONDENSERTherequirementsassociatedwitheachofthecomponentsoftheicecondenserensurethattheoverallsystemwillbeavailabletoprovidesufficientpressuresuppressioncapabilitytolimitthecontainmentpeakpressuretransienttolessthan12psigduringLOCAconditions.3/4.6.5.1ICEBEDTheOPERABILITYoftheicebedensuresthattherequirediceinventorywill1)bedistributedevenlythroughthecontainmentbays,2)containsufficientborontoprecludedilutionofthecontainmentsumpfollowingtheLOCAand3)containsufficientheatremovalcapabilitytocondensethereactorsystemvolumereleasedduringaLOCA.Theseconditionsareconsistentwiththeassumptionsusedintheaccidentanalyses.Theminimumweightfigureof1333poundsoficeperbasketcontainsa5%conservativeallowanceforicelossthroughsublimation.Intheeventthatobservedsublimationratesareequaltoorlowerthandesignpredictionsafterthreeyearsofoperation,theminimumicebasketsweightmaybeadjusteddownward.Inaddition,thenumberoficebasketsrequiredtobeweighedeach18monthsmaybereducedafter3yearsofoperationifsuchareductionissupportedbyobservedsublimationdata.Thecontainmentsub~mpartmcntanalysisassumesa15%blockagethroughouttheicecondenserflowpaths.Theminimumicecondenserflowareathrougheachbayoccursatthelatticeframesupportelevations,andincludesthenetopenareaatthesesupportelevations.Thisincludestheflowarealeftbetweenthecranewallandthecontainmentwallinsidesurfaces,aftersubtractingouttheareasfortheicecondenserequipmentatthatelevation,thatincludesicebasketsfullofice,latticeframe,latticeframecolumns,wallpanelairductsandwallpanelcradlesandotherappurtenances.Insummary,aflowchannelconsistsoftheannularareaoutsideofeachbasketandone-halfofthetriangularareasformedbythelatticesupportsbetweenbaskets,suchthatthesumoftheseareasaroundeachbasketequalsthetotalflowareainthebay.Flowchannelsinradialrowsoneandnineincludetheareabetweenthebasketandthecontainmentandcranewallrespectively.Thereareatotalof81flowchannelsineachbay-onepericebasket.Theselectionofoneflowchanneleachfromradialrows1and9assuresthattheinspectionshouldincludethoseareaswhere,basedonexperience,itisexpectedtoseefrostbuild-upfirst.The3/8"criterionforfrostoriceaccumulationinaflowchannelprovidesonlyanindicatoroficecondensercondition.Thelatticeframethicknessis3/8"and,therefore,thisdimensionprovidesaconvenientvisualreferenceduringflowchannelinspections.Frostoricebuild-upinexcessof3/8"shallbeevaluatedfurtherbyselectingarepresentativesampleof20flowchannelsthatspiraloutwardfromtheaffectedflowchannel.Thissamplepopulationassuresthattheareasaroundandadjacenttotheblockedchannelarealsoinspected.Morethanonerestrictedflowchannelperbayrequiresa100%inspectionofthebayandcalculationtoensurethatthe15%blockagelimitismet.COOKNUCLEARPLANT-UNIT2PageB3/4&4AMENDMENT4,464,204,2%
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3/4BASES3/4,6CONTAINMENTSYSTEMSBecausetheminimumicecondenserflowareaineachicecondenserbayoccursatthelatticeframesupportelevations,theinspectionofthelowerinletplenumsupportstructuresandturningvanes,topdeckfloorgratingandintermediatedeckalsoprovidesonlyanindicatoroftheoverallicecondensercondition.The3/8"thicknesscriterionprovidesathresholdtoensurethatanyfrostoricebuildupiscorrectedwellbeforethe15%blockageassumptionisapproachedintheseareas.3/4.6.5.2ICEBEDTEMPERATUREMONITORINGSYSTEMTheOPERABILITYoftheicebedtemperaturemonitoringsystemensuresthatthecapabilityisavailableformonitoringtheicetemperature.Intheeventthemonitoringsystemisinoperable,theACTIONrequirementsprovideassurancethattheicebedheatremovalcapacitywillberetainedwithinthespecifiedtimelimits.COOKNUCLEARPLANT-UNIT2PageB3/46-5AMENDMENT4,464,204,2%
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ATTACHMENT4TOAEP:NRC:09000EVALUATIONOFSIGNIFICANTHAZARDSCONSIDERATION Attachment4TOAEP:NRC:09000Page1EvaluationofSinificantHazardsConsiderationTheLicenseehasevaluatedthisproposedamendmentanddeterminedthatitinvolvesnosignificanthazardsconsideration.Accordingto10CFR50.92(c),aproposedamendmenttoanoperatinglicenseinvolvesnosignificanthazardsconsideration,ifoperationofthefacilityinaccordancewiththeproposedamendmentshouldnot:1.involveasignificantincreaseintheprobabilityofoccurrenceorconsequencesofanaccidentpreviouslyevaluated;2.createthepossibilityofanewordifferentkindofaccidentfromanypreviouslyanalyzed;or3.involveasignificantreductioninamarginofsafety.TheLicenseeproposestoreviseT/S4.6.5.1b.3and4.6.5.1c,"IceCondenser,IceBed,"anditsassociatedbasesforunits1and2.Theproposedchangeswouldrevisethesurveillanceforicecondenserflowchannelstoprovidereasonableassurancethatblockageofflowchannelsisdetectedandevaluatedtothemaximumanalyzedblockageof15%.ThebasesarerevisedtoreflectthechangestotheT/Sandtoclarifytheintentofadditionalrepresentativesamplingwhenblockedchannelsaredetected.Thedeterminationthat'thecriteriasetforthin10CFR50.92aremetforthisamendmentrequestisindicatedbelow.1.Doesthechangeinvolveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated?Theicecondensersystemisusedtomitigatetheconsequencesofanaccidentandhasnoimpactontheinitiationofanyevaluatedaccidents.Therefore,changingtheflowchannelsurveillancedoesnotincreasetheprobabilityofanevaluatedaccident.Theproposedchangestotheflowchannelsurveillanceprovideadditionalassurancebeyondcurrentrequirementstoprovidereasonableassurancethatthemaximumanalyzedblockageof15%isnotexceeded.Therefore,thechangedoesnotrepresentanincreaseintheconsequencesofanaccidentpreviouslyevaluated.2.Doesthechangecreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated?Theproposedchangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanyaccidentpreviouslyevaluated.Theicecondenserhasnofunctionduringnormaloperation.Itisapassivesystemthatfunctionsafteran Attachment4TOAEP:NRC:09000Page2accidenthasalreadyoccurred.Theproposedchangetotheicecondenserflowchannelsurveillancedoesnotalterphysicalcharacteristicsoftheicecondenser,nordoesitchangethefunctionoftheicecondenser.Nonewfailuremechanismsareintroducedbythischange.Therefore,itwasconcludedthattheproposedchangesdonotcreatethepossibilityofanewordifferentkindofaccidentfromanypreviouslyevaluated.3.Doesthechangeinvolveasignificantreductioninamarginofsafety?Theproposedchangetotheicecondenserflowchannelsurveillanceprovidesadditionalassurancethattheicecondensershouldcontainthe'inimumanalyzedflowarea.Byensuringtheminimumanalyzedareaisalwaysavailable,inherentmarginsduetoconservativeassumptionsinthecalculationaremaintained.Theseconservativeassumptionsinclude,forexample,takingnocreditforiceorfrostblockagebeingblownclearduringtheaccidentandassumingonlyonedimensionalflowthroughtheicebedwithnocredittakenforcrossflow.Therefore,thesechangesdonotinvolveasignificantreductioninamarginofsafety.Insummary,basedupontheaboveevaluation,theLicenseehasconcludedthatthesechangesdonotinvolveasignificanthazardsconsideration.
4L ATTACHMENT5TOAEP:NRC:09000ENVIRONMENTALASSESSMENT Attachment5toAEP:NRC:09000Page1EnvironmentalAssessmentTheLicenseehasevaluatedthislicenseamendmentrequestagainstthecriteriaforidentificationoflicensingandregulatoryactionsrequiringenvironmentalassessmentinaccordancewith10CFR51.21.TheLicenseehasdeterminedthatthislicenseamendmentrequestmeetsthecriteriaforacategoricalexclusionsetforthin10CFR51.22(c)(9).Thisdeterminationisbasedonthefactthatthischangeisbeingproposedasanamendmenttoalicenseissuedpursuantto10CFR50thatchangesarequirementwithrespecttoinstallationoruseofafacilitycomponentlocatedwithintherestrictedarea,asdefinedin10CFR20,orthatchangesaninspectionorasurveillancerequirement,andtheamendmentmeetsthefollowingspecificcriteria.(i)Theamendmentinvolvesnosignificanthazardsconsideration.Asdemonstratedinattachment4,thisproposedamendmentdoesnotinvolveanysignificanthazardsconsideration.(ii)Thereisnosignificantchangeinthetypesorsignificantincreaseintheamountsofanyeffluentthatmaybereleasedoffsite.Asdocumentedinattachment1,therewillbenochangeinthetypesorsignificantincreaseintheamountsofanyeffluentsreleasedoffsite.(iii)Thereisnosignificantincreaseinindividualorcumulativeoccupationalradiationexposure.IITheproposedchangeswillnotresultinsignificantchangesintheoperationorconfigurationofthefacility.Therewillbenochangeinthelevelofcontrolsormethodologyusedforprocessingofradioactiveeffluentsorhandlingofsolidradioactivewaste,norwilltheproposalresultinanychangeinthenormalradiationlevelswithintheplant~Therefore,therewillbenoincreaseinindividualorcumulativeoccupationalradiationexposureresultingfromthischange.
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