ML17332A556
| ML17332A556 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 02/03/1995 |
| From: | INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
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| NUDOCS 9502130202 | |
| Download: ML17332A556 (19) | |
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ATTAQiMENT2TOAEP'NRC:1166/EXISTINGTECHNICALSPECIFICATIONPAGESMARKEDTOREFLECTPROPOSEDCHANGES9502130202950203PDRADQCK050003i5PPDR CI
~iEACTORCOOLANTSYSTEMSURVEILLANCEREQUIRE."KNTS2.Tubesinthoseareaswhereexperiencehasindicatedpotentialproblems'.Atubeinspection(pursuanttoSpecification4.4.5.4.a.8)shallbeperformedoneachselectedtube.Ifanyselectedtubedoesnotpermitthepassageoftheeddycurrentprobeforatubeinspection,thisshallberecordedandanadjacenttubeshallbeselectedandsubjectedtoatubeinspection.c~Inadditiontothesamplerequiredin4.4.5.2.b.lthrough3,alltubeswhichhavehadtheWcriteriaappliedwillbeinspectedintherollexpandedregion.Therollexpandedregionofthesetubesmaybeexcludedfromtherequirementsof4.4.5.2.b.l.d."Thetubesselectedasthesecondandthirdsamples(ifrequiredbyTable4.4-2)duringeachinse'rviceinspectionmaybesubjectedtoapartialtubeinspectionprovided:Thetubesselectedforthesamplesincludethetubesfromthoseareasofthetubesheetarraywheretubeswithimperfectionswerepreviouslyfound..2.Theinspectionsincludethoseportionsofthetubeswhereimperfectionswerepreviouslyfound./5e.Implementationofthesteamgeneratortube/tubespportplateinterimpluggingcriteriaforonefuelcycle(Cycle4requiresa100Xbobbincoilinspectionforhotlegtubesupportplateintersectionsandcoldlegintersectionsdowntothelowestcoldlegtubesupportplatewithknownouterdiameterstresscorrosioncracking(ODSCC)indications.Theresultsofeachsampleinspectionshallbeclassifiedintooneofthefollowingthreecategories:InsectionResultsC-1Lessthan5Xofthetotaltubesinspectedaredegradedtubesandnoneoftheinspectedtubesaredefective.C-2Oneormoretubes,butnotmorethan1Xofthetotaltubesinspectedaredefective,orbetween5XandlOXofthetotaltubesinspectedaredegradedtubes.C-3Morethan10Xofthetotaltubesinspectedaredegradedtubesormorethan1Xoftheinspectedtubesaredefective.COOKNUCLEARPLANT-UNIT13/44-8AMENDMENTNO.~,~,~,178 REACTORCOOPTSYSE'HSSURVE'ZLLANCREUTR:-.M:-NTSCont'uedbThesteamgeneratorshallbedeterminedOPERABLEaftercompletingthecorrespondingactions(pluggingorsleevingalltubesexceedingtherepairlimitandalltubescontainingthrough-wallcracks)requiredbyTable4.4-2.CeSteamgeneatortuberepairsmaybemadeinaccordancewiththemethodsdescribedineitherWCAP-12623orCEN-313-P.4.4.5.5eortsacb.Followingeachinserviceinspectionofsteamgeneratortubes,ifthereareanytubesrequiringpluggingorsleeving,thenumberoftubespluggedorsleevedineachsteamgeneratorshallbereportedtotheCommissionwithin15days.ThecompleteresultsofthesteamgeneatortubeinserviceinspectionshallbeincludedintheAnnualOperatingReportfortheperiodinwhichthisinspectionwascompleted.Thisreportshallinclude:1.Numberandextentoftubesinspected.2~Locationandpercentofwall-thicknesspenetrationforeach.indicationofanimperfection.C~de3.Identificationoftubespluggedorsleeved.ResultsofsteamgeneratortubeinspectionswhichfallintoCategoryC-3andequirepromptnotificationoftheCommissionshallbereportedpursuanttoSpecification6.9.1priortoresumptionofplantopeation.Thewrittenfollowupofthisreportshallprovideadescript'onofinvestigationsconductedtodeterminecauseofthetubedegradationandcorrectivemeasurestakentopreventrecurrence.Theresultsofinspectionsperformedunder4.4.5.2foralltubesinwhichthetubesupportplateinterimpluggingcriteriahasbeenappliedorthathavedefectsbelowtheF+distanceandwerenotpluggedshallbereportedtotheCommissionwithin15daysfollowingtheinspection.Thereportshallinclude:Listingofapplicabletubes.2~Location(applicableintersectionspertube)andextentofdegradation(voltage).e.TheresultsofsteamlinebreakleakageanalysisperformedunderT/S4.4.5.4.a.lOwillbereportedtotheCommissionpriortorestartforCycle~.l~COOKNUCLEARPLANT-UNIT13/44-12KKNDHENTNO.+S&g466p+iip178
~~~~~REACTORCOOLANTSYSTEMO>ERATIONALLEAKAGEIMITINGCONDITIONFOROPERATION3.46.2ReactorCoolantSystemleakageshallbelimitedto:a.'oPRESSUREBOUNDARYLEAKAGEtb.1GPMUNZDENTZFZEDLEAKAGEtCoe.600gallonsperdaytotalprimary-to-secondary..leakage,.throughallsteamgeneratorsand150allonsperdaythroughanyonesteamgeneratorforFuelCycle4I10GPMIDENTIFIEDLEAKAGEfromtheReactorCoolantSystem,Seallineresistancegreaterthanorequalto2.27E-1ft/gpm~and,1GPMleakagefromanyreactorcoolantsystempressureisolationvalvespecifiedinTable3.4-0.APPLICABILITYMODESlg2,3and4.<<<<~CTION:a.b.CoWithanyPRESSUREBOUNDARYLEAKAGE,beinatleastHOTSTANDBYwithin6hoursandin'COLDSHUTDOWNwithinthefollowing30hours.WithanyReactorCoolantSystemleakagegreaterthananyoneoftheabovelimits,excludingPRESSUREBOUNDARYLEAKAGE,reducetheleakageratetowithinlimitswithin4hoursorbeinatleastHOTSTANDBYwithinthenext6hoursandinCOLDSHUTDOWNwithinthefollowing30hours.Withanyreactorcoolantsystempressureisolationvalve(s)leakagegreaterthantheabovelimit,exceptwhen:Theleakageislessthanorequalto5.0gpm,and2~Themostrecentmeasuredleakagedoesnotexceedthepreviousmeasuredleakage<<byanamountthatreducestheTosatisfyALARArequirements,measuredleakagemaybemeasuredindirectly(asfromtheperformanceofpressureindicators)ifaccomplishedinaccordancewithapprovedproceduresandsupportedbycomputationsshowingthatthemethodiscapableofdemonstratingvalvecompliancewiththeleakagecriteria.Specification3.4.6.2.eisapplicablewithaveragepressurewithin20psiofthenominalfullpressurevalue.COOKNUCLEARPLANTUNIT13/44-16AMENDYZNTNO.46&,+66,].78OrderdatedApril20,1981
~~~JVREACTORCOO~TSYSBASES34.4.5SEAMGENERATORSTUBEINTEGRITYTheSurveillanceRequirementsforinspectionofthesteamgeneratortubesensurethatthestructuralintegrityofthisportionoftheRCSwill'bemaintained.Theprogramforinserviceinspectionafsteamgeneratortubesi.sbasedonamodificationofRegulatoryGuide1-83,Revision1.Znserviceinspectionofsteamgeneratortubingisessentialinordertomaintainsurveillanceoftheconditionscifthetubesintheeventthatthereisevidenceofmechanicaldamageorprogressivedegradationduetodesign,manufacturingerrors,orinserviceconditionsthatleadtocorrosion.Znserviceinspectionofsteamgeneratortubingalsoprovidesameansofcharacterizingthenatureandcauseofanytubedegradationsothatcorrectivemeasurescanbetaken.Theplantisexpectedtobeoperatedi.namannersuchthatthesecond-arycoolantwillbemaintainedwithinthosechemistrylimitsfoundtornegligiblecorrosionofthesteamgenezatortubes.Zfthesrycoolantchemistryi.snotmaintainedwithintheseparameterlimitcalizedcorrosionmaylikelyresultinstresscorrosioncracking.Theentofcrackingduri.ngplantoperationwouldbelimitedbythelimi.onofsteamgeneratortubeleakagebetweentheprimarycoolantsystemesecondarycoolantsystem.Theallowabeprimary-to-secondaryleakts150gallonsperdaypersteamgeneratorforonefuelcycle(Cycle.Axialorcircumferent'allyorientedcackshavingaprimary-.to-secondaryleakagelessthanthislimitduringoperationwillhaveanadequatemarginofsafetyto.'withstandtheloadsimposedduringnormaloperationandbypostulatedaccidents.Leakageinexcessofthislimitwillrequireplantshutdownandaninspection,duringwhichtheleakingtubeswillbelocatedandpluggedorrepaired.AsteamgeneatorwhileundergoingcreviceflushinginMade4isavailablefordecayheatremovalandisoperable/operatinguponreinstatementofauxiliaryormainfeedflowcontrolandsearncontrol.Wastage-typedefectsareunlikelywiththeallvolatiletreatment(AVT)ofsecondaycoolant.However,evenifadefectofsimilartypeshoulddevelopinservice,itwillbefoundduringscheduledinservicesteamgeneratortubeexaminations.Pluggingorsleevingwillberequiredforalltubeswithimperfecionsexceeding.therepairlimitwhichisdefinedinSpecification4.4.5.4.a.Steamgeneratortubeinspectionsofoperatingplantshavedemonstratedthecapabilitytoreliablydetectdegradationthathaspenetrated20%oftheoriginaltubewallthi.ckness.Tubesexperiencingouterdiameterstresscorrosioncrackingwithi.nthethicknessofthetubesupportplatesarepluggedorrepairedbythecriteriaof4.4.5.4.a.10.COOKNUCLEARPLANT-UNIT1B3/44-2aAYENDMENTNO.403,@Seesk66s178
~~~~~,~Ie REACTORCOOLANTSYSTEMBASESMaintaininganoperatileakagelimit,of150gpdpersteamgenerator(600gpdtotal)forFuelcycle4willminimizethepotentialforalargeleakageevent,duringsteamlinezeakunderLocAconditions.BasedontheNDEuncertainties,bobbincoilvoltagedistributionandcrackgrowthratefromthepreviousi.nspection,theexpectedleakratefollowingasteamlineruptureislimitedtobelow12.6gpmwhichwi.lllimitthecalculatedoffsitedosestowithin10percentof10CFR100guidelines.Leakageintheintactloopsislimitedto150gpd.Zftheprojectedendofcycledistributionofcrackindicationsesultsinprimary-to-secondaryleakagegreaterthan12.6gpminthefaultedloopduringapostulatedsteamlinebreakevent,additionaltubesmustberemovedfromserviceinordertoreducethepostulatedprimary-to-secondazysteamlinebreakleakagetobelow12.6gpm.PRESSUREBOUNDARYLEAKAGEofanymagnitudei.sunacceptablesinceitmaybeindicativeofanimpendinggrossfailureofthepressureboundary.ShouldPRESSUREBOUNDARYLEAKAGEoccurthroughacomponentwhichcanbeisolatedfromthebalanceoftheReactorCoolantSystem,plantoperationmaycontinueprovidedtheleakingcomponentispromptlyisolatedfromtheReactorCoolantSystemsinceisolationremovesthesourceofpotentialfailure.TheSurveillanceRequirementsforRCSpzessureIsolationValvesprovideaddedassuranceofvalveintegritytherebyreducingtheprobabilityofgrossvalvefailureandconsequentintersystemLOCA.LeakagefromtheRCSPressureIsolationValvesisIDENTIFZEDLEAKAGEandwillbeconsideredasaportionoftheallowedlim'it.34.4.7CH=MZSTRYThelimitationsonReactorCoolantSystemchemi.stryensurethatcorzosionoftheReactorCoolantSystemisminimizedandreducesthepotent'alforReactorCoolantSystemleakageorfailureduetostresscorrosion.MaintainingthechemistrywithintheSteadyStateLimitsprovidesadequatecorrosionprotectiontoensurethestructuralintegrityoftheReactorcoolantSystemovertheli.feoftheplant.Theassociatedeffectsofexceedi.ngtheoxygen,chlor:de,andfluoridelimitsaretimeandtemperaturedependent.CorrosionstudiesshowthatoperationmaybecontinuedwithcontaminantconcentrationlevelsinexcessoftheSteadyStateLimits,uptotheTransientLimits,forthespecifiedlimitedtimein"ervalswithouthavingasi.gnificant,effect.onthestzucturalintegrityoftheReactorCoolantSystem.ThetimeintervalpermittingcontinuedoperationwithintherestrictionsoftheTransientLimitsprovidestimefortakingcorrectiveactionstorestorethecontaminantconcentrationstowithintheSteadyStateLimits.COOKNUCLEARPLANTUNIT1B3/44-4AHENDHENTNO88g%44q178
~i'~~J~ATTACHMENT3TOAEP:NRC:1166$PROPOSEDREVISEDTECHNICALSPECIFICATIONPAGES r~~r EACTORCOOLANTSYSTSURVEILLANCEREUIREMENTSContnued2.3.TubesinthoseareaswhereexperiencehasindicatedpoCentialproblems.Atubeinspection(pursuantCoSpecification4.4.5.4.a.8)shallbeperformedoneachselectedtube.Ifanyselectedtubedoesnotpermitthepassageoftheeddycurrentprobeforatubeinspection,thisshallberecordedandanadjacenttubeshallbeselectedandsubjectedtoatubeinspection.c~Inadditiontothesamplerequiredin4.4.5.2.b.lthrough3,alltubeswhichhavehadtheWcriteriaappliedwillbeinspectedintherollexpandedregion.Therollexpandedregionofthesetubesmaybeexcludedfromtherequirementsof4.4.5.2.b.l.d.Thetubesselectedasthesecondandthirdsamples(ifrequiredbyTable4.4-2)duringeachinserviceinspectionmaybesubjectedtoapartialtubeinspectionprovided:Thetubesselectedforthesamplesincludethetubesfromthoseareasofthetubesheetarraywheretubeswithimperfectionswerepreviouslyfound.2.Theinspectionsincludethoseportionsofthetubeswhereimperfectionswerepreviouslyfound.e.Implementationofthesteamgeneratortube/tubesupportplateinterimpluggingcriteriaforonefue1cycle(Cycle15)requiresa100%bobbincoilinspectionforhotlegCubesupportplateintersectionsandcoldlegintersectionsdowntothelowestcoldlegtubesupportplatewithknownouterdiameterstresscorrosioncracking(ODSCC)indications.~Theresultsofeachsampleinspectionshallbeclassifiedintooneofthefollowingthreecategories:Cate~ox~C-lC-2C-3InsectonResultsLessthan5%ofthetotaltubesinspectedaredegradedtubesandnoneoftheinspectedtubesaredefective.Oneormoretubes,butnotmorethan1%ofthetotaltubesinspectedaredefective,orbetween5Sand10$ofthetotaltubesinspectedaredegradedtubes.Morethan10%ofthetotaltubesinspectedaredegradedtubesormorethan1$oftheinspectedtubesaredefective.COOKNUCLEARPLANT-UNIT13/44-8AMENDMENTNO.'OS,454,446,477-,
EACTORCOOLANTSYSTEMSSURVEILLANCEREUIREMENTSContinuedb.c~ThesteamgeneratorshallbedeterminedOPERABLEaftercompletingthecorrespondingactions(pluggingorsleevingalltubesexceedingtherepairlimitandalltubescontainingthrough-wallcracks)requiredbyTable4.4-2.SteamgeneratortuberepairsmaybemadeinaccordancewiththemethodsdescribedineitherWCAP-12623orCEN-313-P.4.4.5.5R~eortsa.b.Followingeachinserviceinspectionofsteamgeneratortubes,ifthereareanytubesrequiringpluggingorsleeving,thenumberoftubespluggedorsleevedineachsteamgeneratorshallbereportedtotheCommissionwithin15days.ThecompleteresultsofthesteamgeneratortubeinserviceinspectionshallbeincludedintheAnnualOperatingReportfortheperiodinwhichthisinspectionwascompleted.Thisreportshallinclude:l.Numberandextentoftubesinspected.2.Locationandpercentofwall-thicknesspenetrationforeachindicationofanimperfection.C.d.e.3.Identificationoftubespluggedorsleeved.ResultsofsteamgeneratortubeinspectionswhichfallintoCategoryC-3andrequirepromptnotificationoftheCommissionshallbereportedpursuanttoSpecification6.9.1priortoresumptionofplantoperation.Thewrittenfollowupofthisreportshallprovideadescriptionofinvestigationsconductedtodeterminecauseofthetubedegradationandcorrectivemeasurestakentopreventrecurrence.Theresultsofinspectionsperformedunder4.4.5.2foralltubesinwhichthetubesupportplateinterimpluggingcriteriahasbeenappliedshallbereportedtotheCommissionwithin15daysfollowingtheinspection.Thereportshallinclude'.1.Listingofapplicabletubes.2.Location(applicableintersectionspertube)andextentofdegradation(voltage).TheresultsofsteamlinebreakleakageanalysisperformedunderT/S4.4.5.4.a.l0willbereportedtotheCommissionpriortorestartforCycle15.COOKNUCLEARPLANT-UNIT13/44-12AMENDMENTNO.403,446,477, r~p04~&4.
CTORC0SYSOPERATIONALLEAKAGEIMTINGCONDITIONOROPERATION3.4.6.2ReactorCoolantSystemleakageshallbelimitedto:a.b.c~d.e.NoPRESSUREBOUNDARYLEAKAGE,1GPMUNIDENTIFIEDLEDGE,600gallonsperdaytotalprimary-to-secondaryleakagethroughallsteamgeneratorsand150gallonsperdaythroughanyonesteam.generatorforFuelCycle15,10GPMIDENTIFIEDLEAKAGEfromtheReactorCoolantSystem,Seallineresistancegreaterthanorequalto2.27E-1ft/gpm~and,1GPMleakagefromanyreactorcoolantsystempressureisolationvalvespecifiedinTable3.4-0.~ACTI0a.b.C.WithanyPRESSUREBOUNDARYLEAKAGE,beinatleastHOTSTANDBYwithin6hoursandinCOLDSHUTDOWNwithinthefollowing30hours.WithanyReactorCoolantSystemleakagegreaterthananyoneoftheabovelimits,excludingPRESSUREBOUNDARYLEAKAGE,reducetheleakageratetowithin,limitswithin4hoursorbeinatleastHOTSTANDBYwithinthenext6hoursandinCOLDSHUTDOWNwithinthefollowing30hours.Withanyreactorcoolantsyst:empressureisolationvalve(s)leakagegreaterthantheabovelimit,exceptwhen:1.,Theleakageislessthanorequalto5.0gpm,and2.Themostrecentmeasuredleakagedoesnotexceedthepreviousmeasuredleakage*byanamountthatreducestheTosatisfyALARArequirements,measuredleakagemaybemeasuredindirectly(asfromtheperformanceofpressureindicators)ifaccomplishedinaccordancewithapprovedproceduresandsupportedbycomputationsshowingthatthemethodiscapableofdemonstratingvalvecompliancewi.ththeleakagecriteria.Specification3.4.6.2.eisapplicablewithaveragepressurewi.thin20psiofthenominalfullpressurevalue.COOKNUCLEARPLANT-UNIT13/44-16AMENDMENTNO.462,466,~OrderdatedApri.l20,1981 I~~r(tV"tt~I'P,l EACORCOOSYSTBASES3445STEAMGENERATORSTUBEINTEGRITYTheSurveillanceRequirementsforinspectionofthesteamgenerator.tubesensurethatthestructuralintegrityofthisportionoftheRCSwillbemaintained.TheprogramforinserviceinspectionofsteamgeneratortubesisbasedonamodificationofRegulatoryGuide1.83,Revision1.Inserviceinspectionofsteamgeneratortubingisessentialinordertomaintainsurveillanceoftheconditionsofthetubesintheeventthatthereisevidenceofmechanicaldamageorprogressivedegradationduetodesign,manufacturingerrors,orinserviceconditionsthatleadtocorrosion.InserviceinspectionoRsteamgeneratortubingalsoprovidesameansofcharacterizingthenatureandcauseofanytubedegradationsothatcorrectivemeasurescanbetaken.Theplantisexpectedtobeoperatedinamannersuchthatthesecond-arycoolantwillbemaintainedwithinthosechemistrylimitsfoundtoresultinnegligiblecorrosionofthesteamgeneratortubes.Ifthesecondarycoolantchemistryisnotmaintainedwithintheseparameterlimits,localizedcorrosionmaylikelyresultinstresscorrosioncracking.Theextentofcrackingduringplantoperationwouldbelimitedbythelimitationofsteamgeneratortubeleakagebetweentheprimarycoolantsystemandthesecondarycoolantsystem.Theallowabeprimary-to-secondaryleakrateis150gallonsperdaypersteamgeneratorforonefuelcycle(Cycle15).Axialorcircumferentia'ilyorientedcrackshavingaprimary>>to-secondaryleakagelessthanthislimitduringoperationwillhaveanadequatemarginofsafetytowithstandtheloadsimposedduringnormaloperationandbypostulatedaccidents.'eakageinexcessofthislimitwillrequireplantshutdownandaninspection,duringwhichtheleakingtubeswillbelocatedandpluggedorrepaired.AsteamgeneratorwhileundergoingcreviceflushinginMode4isavailablefordecayheatremovalandisoperable/operatinguponreinstatementofauxiliaryormainfeedflowcontrolandsteamcontrol.Wastage-typedefectsareunlikelywiththeallvolatiletreatment(AVT)ofsecondarycoolant.However,evenifadefectofsimilartypeshoulddevelopinservice,itwillbefoundduringscheduledinservicesteamgeneratortubeexaminations.Pluggingorsleevingwillberequiredfora'lltubeswithimperfectionsexceedingtherepairlimitwhichisdefinedinSpecification4.0.5.4.a.Steamgeneratortubeinspectionsofoperatingplantshavedemonstratedthecapabilitytoreliablydetectdegradationthathaspenetrated20%oftheoriginaltubewallthickness.Tubesexperiencingouterdiameterstresscorrosioncrackingwithinthethicknessofthetubesupportplatesarepluggedorrepairedbythecriteriaof4.4.5.4.a.lO.COOKNUCLEARPLANT-UNIT1B3/44-2aAMENDMENTNO.403,454,446,~
p(lgoi,I4~~sym REACTORCOOLANTSYSTEMBASESMaintaininganoperatingleakagelimitof150gpdpersteamgenerator(600gpdtotal)forFuelCycle15willminimizethepotentialforalargeleakageeventduringsteamlinebreakunderLOCAconditions.BasedontheNDEuncertainties,bobbincoilvoltagedistributionandcrackgrowthratefromthepreviousinspection,theexpectedleakratefollowingasteamlineruptureislimitedtobelow12.6gpmwhichwilllimitthecalculatedoffsitedosestowithin10percentof10CFR100guidelines.Leakageintheintactloopsislimitedto150gpd.Iftheprojectedendofcycledistributionofcrackindicationsresultsinprimary-to-secondaryleakagegreaterthan12.6gpminthefault'edloopduringapostulatedsteamlinebreakevent,additionaltubesmustberemovedfromserviceinordertoreducethepostulatedprimary-to-secondarysteamlinebreakleakagetobelow12.6gpm.PRESSUREBOUNDARYLEAKAGEofanymagnitudeisunacceptablesinceitmaybeindicativeofanimpendinggrossfailureofthepressureboundary.ShouldPRESSUREBOUNDARYLEDGEoccurthroughacomponentwhichcanbeisolatedfromthebalanceoftheReactorCoolantSystem,plantoperationmaycontinueprovidedtheleakingcomponentispromptlyisolatedfromtheReactorCoolantSystemsinceisolationremovesthesourceofpotentialfailure.TheSurveillanceRequirementsforRCSPressureIsolationValvesprovideaddedassuranceofvalveintegritytherebyreducingtheprobabilityofgrossvalve'failureandconsequentintersystemLOCA.LealcagefromtheRCSPressureIsolationValvesisIDENTIFIEDLEAKAGEandwillbeconsideredasaportionoftheallowedlimit.3447CHEMISTRYThelimitationsonReactorCoolantSystemchemistryensurethatcorrosionoftheReactorCoolantSystemisminimizedandreducesthepotentialforReactorCoolantSystemleakageorfailureduetostresscorrosion.MaintainingthechemistrywithintheSteadyStateLimitsprovidesadequatecorrosionprotectiontoensurethestructuralintegrityoftheReactorCoolantSystemoverthelifeoftheplant.Theassociatedeffectsofexceedingtheoxygen,chloride,andfluoridelimitsaretimeandtemperaturedependent.CorrosionstudiesshowthatoperationmaybecontinuedwithcontaminantconcentrationlevelsinexcessoftheSteadyStateLimits,uptotheTransientLimits,'forthespecifiedlimitedtimeintervalswithouthavingasignificanteffectonthestructuralintegrityoftheReactorCoolantSystem.ThetimeintervalpermittingcontinuedoperationwithintherestrictionsoftheTransientLimitsprovidestimefortakingcorrectiveactionstorestorethecontaminantconcentrationstowithintheSteadyStateLimits.COOKNUCLEARPLANT-UNIT1B3/44-4AMENDMENTNO.53,444,~
~,r~~ll