ML17331B196

Control Rod Misalignment Analysis.

ML17331B196
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Issue date:	09/30/1993
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9ATTACHMENT 4TOAEP'NRC'1182 CONTROLRODMISALIGNMENT ANALYSIS9401270040 940117'PDR,ADGCK05000315'

.,'DR

DONALDCeCOOKNUCLEARPLANTCONTROLRODMISALIGNMENT ANALYSISSEPTEMBER 1993AMERICANELECTRICPOWERSERVICECORPORATION

COLUMBUS, OHIO TABLEOFCONTENTSIntroduction andDefinition ofTerms........................1 1.1Introduction 1.2Definition ofTerms2.ARPITechnical Secification

................................3 2.1ProblemDescription 2.2ProblemSolution333~RodMisalinmentConcerns..................................

53.1Reactivity Control3.2ControlRodMisoperation 3.3RodE)ection3.4PowerOperation withMisaligned Rod55784~PowerDistribution Analses.................................9 4.1AnalysisMethods4.2Misalignment Calculations 4.3LoadFollowTransients 4.4Unit1Applicability 101114155.Technical Secification ChanesandImlementation

.........16 5.1Technical Specification Changes5.2Technical Specification Implementation 16186.~Summa'...................................................20 78.References

.................................................65 INTRODUCTION ANDDEFINITION OFTERMS1.1Introduction l'heDonaldC.CookNuclearPlantconstructed andoperatedbytheAmericanElectricPowerCompanyislocatedalongtheeasternshoreofLakeMichiganinBridgman, BerrienCounty,4Michigan.

Thereactorisaclosed<<cycleg pressurized, lightwatermoderated andcooledsystem,andusesslightlyen-richeduraniumoxidefuel.TheUnit1reactorisdesignedtoproduce3250MW~~andUnit2isdesignedtoproduced3411MW~.Thisreportdescribes theresultoftheanalysesperformed tomodifytherodpositionindication systemtechnical specifications.

1.2Definition ofTermsThefollowing listofsymbols,termsandabbreviations willbeusedconsistently throughout thisreportsBOLMOLEOLMWD/MTURCCAARPIT/SRTPPDILBeginning ofLifeMiddleofLifeEndofLifeMegawattdayspermetrictonneofuraniummetal(represents burnupoffuel)RodClusterControlAssemblies (typeofcontrolrodsused)=AnalogRodPositionIndication (typeofsystemusedtodetermine theaxialpositionofindividual controlrods)Technical Specification RatedThermalPowerPowerDependent Insertion Limit(represents insertion limitsforcontrolbanks)

APLAROQpopcmstepAllowable PowerLevel(Monthlysurveillance determines thispowerlevel.Thispowerlev-elassuresthatlimitsonheatfluxhotchan-nelfactorsareprotected.)

AllRodsOutChangeinreactivity (dp=lnk,/Qwherek,andQareeigenvalues obtainedfromtwocalculations)

Percentmille(areactivity changeof1pcmequalsareactivity changeof10~)Aunitofcontrolrodtravelequalto0.625inchppmk(Z)HFPHZPCAOCPartspermillionbyweight(specifies chemi-calshimboronconcentration)

Heatfluxhotchannelfactor(maximumrodpoweratanyaxialleveldividedbyaveragerodpoweratthataxiallevel)Enthalpyrisehotchannelfactor(maximumrodpowerdividedbyaveragerodpower)F<normalized tothemaximumvalueallowedatanycoreheightHotFullPowerHotZeroPowerConstantAxialOffsetControl(powerdistribution controlprocedure) 2.ARPZTECHNICAL SPECIFICATION 2.1ProblemDescritionThecurrentTechnical Specifications (T/Ss)allowanindividual RodClusterControlAssembly(RCCA)tobemisaligned fromthebankdemandpositionifthemisalignment islessthan12steps.AsstatedintheNRCletterdatedOctober28,1979(Reference 1-letterfromA.Schwencer, NRCtoJ.Dolan,AEP),Westinghouse performed safetyanalysesforcontrolrodmisalignment upto24stepsatthetimeofthedevelopment oftheStandardTechnical Specifications.

TheletteralsonotedthattheAnalogRodPositionIndication (ARPI)systemisdesignedtoanaccuracyof12steps.Thus,inordertoguarantee arodmisalignment oflessthan24steps,theindicated ARPIreadingsmustbenolargerthan12steps.Experience withtheARPIsystemhasshownthattheindicated misalignment couldbegreaterthan12steps.Itshouldbenotedthattherewasnoevidenceofactualmisalignment inthemajorityofcases.Procedures areinplacetodealwithactualrodmisalignment whenitoccurs.InordertoreducetheactionitemsimposedduetothecurrentT/Slimits,itisnecessary tochangetheT/Stoallow18stepmisalignment.

Therefore, analysesmustbeperformed for30step(18stepindicated

+12stepuncertainty) misalignment.

2.2ProblemSolutionTheT/Ssallowreactoroperation withthecontrolrodsatPowerDependent Insertion Limit(PDIL).TheT/Ssalsopro-videlimitsforpeakingfactorsF<andFm,.Asthepowerlevelislowered,thelimitsforF<andFz,increaseaccord-ingto:

a.F~U'/Pb.F>,~[1+0.2(1-P))orF<<~[1+0.3(l-P))wherePisthefraction ofRatedThermalPower.Theseincreases inthelimitforF<andF>,canbeusedforaccommodating increased RCCAmisalignment atalowerpowerlevel.Thatis,at85%RTP,thelimitforpeakingfactor,F<<increases by15%.Analysesmustshowthattheincreaseinpeakingfactorduetoa30-stepmisalignment (18stepindicated

+12stepuncertainty) islowerthan15%.Ifitis,thenaT/Srequirement of18stepsispossibleuptoapowerlevelof85%RTP.At100%RTP,thecurrentlevelofmisalignment of24steps(12stepindicated

+12stepuncertainty) ismaintained.

IfthemeasuredF<andF>,at100%RTParesmallerthanthecorresponding limitsat100%RTP,thenthesemarginscanbeusedforaccommodating largerthan12-step(indicated) misalignments.

Thiscanbedetermined onamonthlybasisincon)unction withincorefluxmapping.Theadvantage ofthisprocedure isthattheinitialcondi-tionsfortransients areunaffected.

RODMISALIGNMENT CONCERNS3.1Reactivit ControlItisnecessary atalltimestomaintainenoughreactivity outofthecoretosafelycoverthepowerdefectwithasuitablemarginallowedforaccidents.

Inordertomaintainthisrequiredshutdownmargin,arodbankPowerDependent Insertion Limit(PDIL)isset.Theamountofreactivity associated withthisinsertion limitiscalledtherodin-sertionallowance.

RCCAswhicharemisaligned inwardfromtheirbankdemandpositionwilladdtotherodinsertion allowance.

Thereactivity ofamisaligned group(mis'aligned by30steps)wascalculated tobelessthan120pcm(Table3.1-1).Thisissubstantially lessthantheexcessshutdownmargingenerally available.

Tables3.1-2and3.1-3showexcessshutdownmarginforpastcyclesinbothunits.TheIUnit1PDILwillbechangedtomatchtheUnit2PDILatthebeginning ofcycle14.Figures3.1-1and3.1-2showtheUnit1andUnit2PDILsrespectively.

BymakingthePDILsimilarforbothunits,theUnit2analysesdetailedinthisreportcanalsobeappliedforUnit1.3.2ControlRodMisoerationTheworstcasecontrolrodmisoperation accidenthasbeenpreviously analyzed(Reference 2,3)andfoundthatapplica-bleacceptance criteriaaremet.

Amisoperation ofcontrolrodsisdetectedby<a0b.c~d~changeinpowerlevelasseenbythenuclearinstrumen-tationsystemasymmetric powerdistributions asseenbythenuclearinstrumentation systemorcoreexitthermocouples rodbottomlightroddeviation alarmReactorprotection forcontrolrodandcontrolbankdropeventisprovidedbythepowerrangeneutronfluxhighnega-tiveratetrip.Thisprotection isaugmented bythefollow-ingalarms:lowlevelandlow-lowlevelrodinsertion limit.AdroppedRCCAbankresultsinareactivity insertion great>>erthan500pcmwhichwillbedetectedbythepowerrangeneutronfluxnegativeratetripcircuitry.

ForadroppedRCCAeventinautomatic rodcontrolmode,therodcontrolsystemdetectsadropinpowerlevelandiniti-atesbankwithdrawal.

Powerovershoot mayoccurduetothisafterwhichthecontrolsystemwillinsertthebanktore-storenominalpower.Powerovershoot isnotimpactedsincetheexistinganalysisassumedRCCAdropfromAROposition.

Theimpactduetopowerdistribution isminimalsincetheadditional misalignment ofsixstepsisallowedonlyifthereissufficient margininF<andFz,atfullpower.Powerdistribution calculations wereperformed andaredetailedinSection4.Znthecaseofstatically misaligned RCCA,ananalysiswasperformed bythevendortoshowthattheDNBRdoesnotfall i<~eyIft belowthelimitvalue.Themostseveremisalignment withrespecttoDNBRatsignificant powerlevelsarisefromcasesinwhichoneRCCAisfullyinserted, orwherecontrolbankDisfullyinsertedwithoneRCCAfullywithdrawn.

Multipleindependent alarms,including abankinsertion limitalarm,alerttheoperatorwellbeforethepostulated conditions areapproached.

Theanalysiswasperformed withcontrolbankDdeeplyinsertedasthecriteriaonDNBRandpeakingfactorwillallow.Tobeconservative, thePDILforUnit1willbemovedupbysevenstepstoaccommodate thepossiblesix-stepIImisalignment

[SeeFigure3.1-2.Allowedinsertion of182stepsatHFPwaschangedto189stepsatHFP.]Acontrolrodwhichismisaligned fromitsbankatPDZLcanslightlyincreasetheavailable ejectedrodworth.Calcula-tionswereperformed atHZPandHFPconditions.

AnHZPmis-alignment isnotaconcernsincethecalculation isper-formedforrodejectionfromafullyinsertedposition.

Atfullpowerconditionsg anincreaseinworthoflessthan30pcm(119pcm-:4=29.75pcm)inrodworthwascalculated.

Sinceadequatemarginexistsbetweenthecalculated pelletenergydeposition andtheacceptance

criteria, themisalignment presentsnoconcerninthisarea.Are-analysisoftheEOLHZProdejectioneventwasperformed toaccountforeffectsofoperation downto50%powerforextendedperiodsoftime(Reference 10).Specifically, there-analysis addressed increases intheejectedrodworthandhotchannelfactor.Theresultsshowedaveragefuelpelletenthalpyandfuelcentertemperature tobebelowlimits.

3.4Power0erationwithaMisalinedRodTheNSSSvendorhasperformed safetyanalysesforcontrolrodmisalignments upto24stepsfromthebankdemandpositiontoshowthatthemisalignment willnotcausepowerdistributions worsethanthelimits.Operation withanRCCAsignificantly misaligned fromitsbankdemandpositionwouldnormallybedetectedandpromptlyrealigned.

Intheunlikelyeventthatoperation withacontrolrodmis-alignment ofgreaterthan24stepswouldoccur,theimpactonpowerdistribution wouldbeofconcern.TheincreaseinpeakingfactorsduetosingleRCCAmisalignment maybesmallbutmisalignment ofonegroupofRCCAsmaycontribute toincreases inpeakingfactors.Powerdistributions withcontrolrodmisalignment of30stepsweretherefore evaluated indetail,andtheresultsarepresented inSection4ofthisreport.

4.POWERDISTRIBUTION ANALYSESNeutronic analyseswereperformed toevaluatetheimpactofRCCAmisalignment onsteadystatepowerdistributions andnormaloper-ationaltransients suchasload-follow operations.

Calculations weredoneforbothinwardandoutwardmisalignments fromthede-mandcounterposition.

Currenttechnical specifications requirethatthereactoroperation berestricted toa+5%axialoffsetbandaboutatargetaxialoffset(CAOCoperation).

Thisrestriction controlstheaxialpowerdistribution andminimizes transient xenoneffectsontheaxialpowerdistribution.

ThereactorisoperatedbelowanAllowable PowerLevel(APL)whichassuresthatthepowerdistributions arisingfromoperation underthisstrategywillmeetthelimitonheatfluxhotchannelfactor.Thetechnical specification onquadrantpowertiltratioassuresthattheradialpowerdistribution doesnotdeviatesubstantially fromthemeasuredsteadystatepowerdistribution betweenfluxmaps.Therefore limitsonaxialoffsetandadrantowertiltratioarevitaltomaintainin satisfactor owerdistribution andas-surethatmostoftheRCCAmisalinmentsaredetectedandcor-rectedinatimelmanner.

4.1AnalsisMethodTheprincipal toolusedinthesecalculations istheWestinghouse ANCcode(Reference 6)exercised inathree-dimensional mode.Fullcoreandquartercoremodelswereusedfortheanalyses.

Inthismodel,eachfuelassemblyisdescribed byfournodesintheXYplaneand26axialnodes.Themacroscopic cross-sections forANCweregenerated byPHOENIX-P (Reference 7).Thecalculations wereperformed byWestinghouse usingapprovedmethodology.

ANCalsohasthecapability ofcalculating discretepinpowerandpinburnupfromthenodalinformation.

TheF<~andF~+thusobtainedisshowninTables4.2-1through4.2-14.Itshouldbenotedthatasfarasthisanalysisisconcerned, weareinterested inchangesinF<ratherthanabsolutevaluesofF<.TheUnit2,Cycle9ANCmodelwasusedfortheRPIanalysissinceUnit2corehasaxialblanketsandtherefore moreconservative calculation fromapeakingfactorstandpoint.

Also,theF<andFz<T/Slimitsareslightlymorerestrictive fortheremaining ANFfuelinunit2.Inordertoshowthatthecalculational toolsusedintheanalysisarereasonable, theUnit2,Cycle9ANCmodelwasdepletedandresultsofthepowerdistribution andboronletdowncalculations werecomparedtothemeasuredvalues.ThisisshowninAppendixA.Theloadingpatternandcontrolrodlocations forUnit2,Cycle9areshowninFigures4.1-1and4.1-2.Theloadingpatternandcontrolrodlocations forUnit1,Cycle13are

showninFigures4.1-3and4.1-4.4.2MisalinmentCalculations Thefirststepwastodetermine apowerlevelatwhichthepeakingfactorincreaseduetoRCCAmisalignment of30steps(18stepindicated

+12stepuncertainty) couldbeaccommo-dated.Therefore, misalignment calculations fromPDILwereperformed.

ThequestionofmultipleRCCAmisalignment wasaddressed byanalyzing misalignments ofgroupsofRCCAsinthecontrolbank(Groups1and2inControlBankD).Groupmisalignment wasconsidered sinceitismorerealistic toassumethattheRCCAsinonegroupwouldmis-stepratherthandifferent RCCAsfromdifferent groupswouldmis-step.

However,somesingleRCCAmisalignment calculations werealsoperformed.

Especially, misalignment ofRCCAH-8wasinvestigated sinceitisinthemiddleofthecoreandwillbedifficult todetectthroughmonitoring excoredetectorquadranttilt.First,thechangeinpeakingfactorsduetooperation atlowerpowerlevelswithoutRCCAmisalignments wasinvestigated.

AsseeninTable4.2-1,peakingfactorsF<andFz<donotchangesubstantially withpowerchangeaslongasthereactoroperation isonCAOC.Misalignment calculations werethenperformed at85%RTP.Themisalignment effectofasingleRCCAH-8andthemisalignment effectofgroup1and2wereinvestigated.

FromTable4.2-2,itcanbeseenthatthemaximumincreaseinF<is4.7%andmaximumincreaseinF~,is2.1%.Similarcalculations atMOLgaveamaximumincreaseof6.6'tinF<and0.7%inF>,(Table4.2-3).EOLcalculations yieldedanincreaseof7.4%inF<and0.9%inF>,(Table4.2-4).

Asnotedinprevioussection,theequations governing thelimits(ANFfuel)forF<andF~areasfollows:~e2.1xP(z)PF~(=1.49[1+0.2(1-P))

Therefore, thelimitsat85%RTPwillbe:FLac$5%RlP~247FIJmh$$%RTPItisevidentthatthelimitforF<increased by17.6%andthelimitforF~increased by2.6%at85%RTP.Therefore, a+18stepsmisalignment isacceptable uptoapowerlevelof85'%TPeOthersensitivity runswerealsomadeforsimilarRCCAmis-alignments fromdifferent D-bankpositions otherthanPDIL.Resultsofmisalignment calculations fromD-bankpositionof215stepsisshowninTable4.2-5.Table4.2-6showstheresultsofcalculations at50%RTPwithcontrolbankatPDIL(i.e.,Dat94.5stepsandCat222.5steps).ThemaximumincreaseinF<inthesecalculations wasfoundtobe7.3%andmaximumincreaseinF>,wasfoundtobe2.7%.Fullcoreanalysisforinvestigating singleRCCAmisalign-mentwasperformed.

RCCAsH-12andD-12weremisaligned 30stepsfromAROandPDILandincreases inF<andFz,.noted.

12 S

FromTables4.2-7,itcanbeseenthatF<increased by1.7%andFz,increased by0.9%.Thisisaccommodated bytheincreases inlimitsat85%RTP.ItshouldalsobenotedthattheimpactofRCCAH-8misalignment onpeakingfactorissmall.Therefore, itcanbeconcluded thata18-stepmisalignment upto85%RTPcanbetolerated.

Thenextstepwastoperformsensitivity calculations todetermine theadditional misalignment (above12stepsindi-cated)allowedatpowerlevelsbetween85%RTPand100%RTP.Forthis,misalignment calculations wereperformed for24steps(12stepindicated

+12stepuncertainty),

27steps(15stepindicated

+12stepuncertainty),

and30steps(18stepindicated

+12stepuncertainty).

Thesecalculations at100%RTPwereperformed forthefollowing RCCAsincon>>trolbankD:H-8,RCCAsinGroup1andRCCAsinGroup2.Resultsfromthesecalculations areshowninTables4.2<<8through4.2-10.Sensitivity runsweremadeforasimilarmisalignment casefromaD-bankpositionof215stepsratherthanfromPDIL.ResultsareshowninTables4.2-11and4.2-12.ReviewoftheseresultsshowsthatthechangeinF<is2.2%andFz,is0.4%.Thesechangesaresimilartothechangeinpeakingfactorsduetomisalignment fromPDIL.TheeffectofasingleRCCAmisalignment (D-12,K-14,H-12 andK-8)onpeakingfactorsisshowninTable4.2-13;asseenbefore,theimpactissmall.TheincreaseinF<duetoanadditional misalignment ofthreestepsovertheexisting12step(indicated) misalign-13 mentwasfoundtobe0.9%.Theincreaseduetoanaddition-almisalignment ofsixstepswasfoundtobe1.6%.Additional load-follow calculations indicateanincreaseof3.4%.Sincetheanalysiswasperformed foratypicalcyclegtheF<marginnecessary isincreased to6%forconservatism.

Thismeansthatifamarginof6%inF<exists,thenanadditional misalignment ofsixsteps(i.e.,totalof18steps-indicated) isallowedat100%RTP.AsfaraspeakingfactorFz,isconcerned, a0.5%increaseoverthe12-stepmisalignment caseisnoted.Load-follow calculations indicatethata0.8%marginisrequired.

Thiswastheincreasecalculated forthe18-stepcaseoverthe12stepcase.Znconclusion, itcanbementioned thatiftherequirements giveninT/s3.1.3.1aresatisfied, T/SlimitsonF<andF~,willnotbeviolatedevenwithan18-step(indicated) misalignment.

SincetheTSlimitlnconditions foroera-tionsarenotviolatedtheinitialconditions assumedinaccidentanalsesarenotviolated.

4.3Load-Follow Transient withRCCAMisalinmentEffectofload-follow maneuverandmisalignment onpeakingfactorswasinvestigated.

Axialpowerdistribution whichcouldbeobtainedduringaload-follow operation wasobtainedbyskewingtheEOLxenondistribution tothebottom.Thisisaconservative assumption sincetypicalload-follow underCAOCruleswillnotgiveaskewedxenondistribution asthis.AnoptionintheANCcodewasusedtogettheskewedxenondistribution.

14-TheresultsoftheanalysisisshowninTables4.3-1through4.3-3.TheeffectofsingleRCCAH-8misalignment issmallasbefore.ThechangeinF<duetogroupmisalignment wasfoundtobe3.4%.4.4Unit1Alicabilit

'heanalysesinprevioussectionswereperformed forUnit2(3411MWt)whichconsistsof17x17fuelassemblies.

TheUnit1core(3250MWt)consistsof15x15fuelassemblies.

Bothunitshave12feetcoresconsisting of193assemblies.

Thedifference inthefueltypeisnotconsidered tobesig-nificantforthistypeofanalysis.

Moreover, theUnit1PDZLhasbeenmoveduptomatchtherevisedUnit2insertion limitshowninFigure3.1-1.SincetheT/Ssallowa12-stepmisalignment forbothunitscurrently, regardless ofthefueltypeorpowerlevel,andsincethePDILwillbethesameforbothunits,theanalysesperformed forUnit2isapplicable forUnit1.Asensitivity studyusingthePHOENXX/ANC modelforUnit1,Cycle13showsthattheresponseduetorodmisalignment isalmostthesameasthatinUnit'.AsshowninTable4.4-1,BOLcalculations forUnit1yieldedachangeof6.2%and1.1%forF<andFz<<respectively.

AlthoughthechangeinF<isslightlyhigherinUnit1comparedtoUnit2,suchdifferences areexpectedandareaccounted forintheF<marginnecessary toachieve18stepmisalignment atfullpower.

TECHNICAL SPECIFICATION CHANGESANDIMPLEMENTATION 5.1Technical Secification ChanesFromtheanalysesdetailedinSection4.0,itcanbeseenthattheincreaseinpeakingfactorF<duetoanRCCAmisalignment of30steps(18stepindicated

+12stepuncertainty) islessthan8%andtheincreaseinF>,islessthan3%.Theseincreases inpeakingfactorscanbeaccommodated atapowerlevelof85%RTP.Therefore, therevisedT/SsallowRCCAmisalignments of+18steps(indicated) uptoapowerlevelof85%RTP.[ThecurrentT/Ssallowrodmisalignment of+12steps(indicated) upto100%RTP.)AnalysisdetailedinSection4alsoshowsthata3.4%margininF<isnecessary toaccommodate amisalignment of30steps(18stepsindicated

+12stepuncertainty) atfullpower.Thatis,F<increases by3.4%foran18-step(indicated) misalignment comparedtoa12-step(indicated) misalignment.

Forconservatism, thisisincreased torequireamarginof6%inFg,ThecurrentT/Sbasisreferences a4%F>,marginforuncertainties arisingfromabnormalperturbations inradialpowershape.Thisanalysisshowsthata0.8%margininF~,isrequiredtotakeintoaccountan18-step(indicated) misalignment.

Therefore, theconservative requirement of4%marginisretainedandisadheredtoinastrictmannerbyspecifying thisrequirement inT/Sfigure3.1-4(Appendix B)~

ItshouldbenotedthatthemargininF<isthatavailable beyondtheexpectedtransient F<andiscomputedinthefol-lowingway:F<(measured-steady state)F<(penalized)

F<(transient)

F<(limit)FM=FqMX1.03X1.05FgwX1~03X1+05XV(Z)Fq"Xk(Z)marginFxk(Z)Fzx1.03x1.05xV(Z)Comparedwiththedefinition ofAPLinT/S3.2.6,themargindefinedaboveisessentially theAPL.Notethatthemargincalculated iswithrespecttothelimitat100%RTP.InasimilarmannerthemargininF~,(definedasR)iscalculated inthefollowing way:F>,(measured-steady state)F~)(limit)=F~iNFUmh100%RTP hllmarginRFLimfc100%RTPhHNF~HTherefore, iftheAPLgiveninthemonthlyincorefluxmapis106%andifthevalueofR(margininFz,)is1.04,thenanadditional six-stepmisalignment isallowedabove85%RTP.IftheAPLislower,thenaloweramountofmisalignment isallowed.Thisisgraphically showninT/S17 Figure3.1-4.Sinceanewrodinsertion limitwasusedintheanalysis/

theunit1PDZLwillbechangedtoreflectthelimitusedintheanalysisatthebeginingofcycle14.TheupdatedT/SpagesforbothunitsaregiveninAppendixB.18 p8ge 5.2Technical Secification Imlementation AsseeninSection5.1,theupdatedT/Ssallowarodmis-alignment of+18stepsforpowerlevelslessthanorequalto85%RTP.Above85%RTP,thelevelofmisalignment allowedisbasedonthepeakingfactorsobtainedfromthemonthlyincorefluxmaptaken.Forthis,theplantprocedure, "Surveillance ofcorepowerdistribution limit/"(**1EHP4030STP.330and**2EHP4030STP.330)willberevisedtoprovidetheallowedrodmisalignment onamonthlybasis.TheincorefluxmapgivesthevaluesforAPLandF>,andfromT/SFigure3.1-4,theadditional rodmisalignment isobtained.

Forexample,ifanincorefluxmaptakenat98%RTPgivesthefollowing:

FolclMRdhH1.40APL103%Therefore,

~mimit1000hHHeaaurod~he1.491.404$1.064

SincethevalueofRobtainedisgreaterthan1.04,fromT/SFigure3.1-4,foranAPLof103%,amisalignment of15stepsisobtainedforpowerlevelsgreaterthan85%RTP.Znordertoassistthereactoroperatorlndetermining theallowedrodmisalignment, aplotasshownbelowmaybeprovided.

ALLONfEDRODMISALIGNMENT ARM(STEPS)262016-6-00204060RATEDTHERMALPOWER(%)80100 6,SUMMARYRCCAmisalignments upto30steps(18stepsindicated

+12stepsuncertainty) wereevaluated forimpactonpeakingfactorsandreactivity worths.Areviewoftheresultsofthetransient analysesshowedthatadequateconservatism existsintheanalysestoabsorbthepenalties associated withincreased rodmis-alignment.

Asaconservative measure,thepowerdependent inser-tionlimit(PDIL)willbemovedslightlyupwards.Powerdistributions wereevaluated understeadystateandload-followconditions withrodmisalignment of30steps(18stepsindicated

+12stepsuncertainty) showedthattheincreaseinpeakingfactorscouldbeaccommodated atorbelow85%RTP.Calculations alsoshowedthatabove85%RTP,amisalignment of30steps(18stepsindicated

+12stepsuncertainty) couldbeaccommodated iftheAPLisatleast106%andthemargininFz,isatleast4%.Itshouldbenotedthattypicalplantoperation iswithcontrolrodsessentially withdrawn fromthecoreandunderconstantaxialoffsetcontrol.Also,thequadranttiltismonitored.

This,coupledwiththefactthatactualcontrolrodmisalinmentsarerareshowsthatthisanalsisisconservative.

Anactualcon-trolrodmisalinmentwouldberomtlrealineduonverifica-tionofitsosition.Basedonthis,thetechnical specification changesgiveninthisreportdonotincreasetheprobability ofanaccidentordecreasesafetymarginspreviously established.

21 TABLE3.1-1RODWORTHCALCULATION Bank/Group Rodworth(pcm)DeltapcmControlBankD9189248.3ControlBankD8189,Grou28159ControlBankD9189,Group19159367.7349.6119.4101.322

~'

TABLE3.1-2UNIT1SHUTDOWNMARGINParameter Cycle101213NetRodWorth[(ARI-1)*0.9]

HFPRequirement 66206399338035006170350059135807297029565837296857642970587054795743339029042274573322935736576823192461RequiredShutdownMarginExcessShutdownMargin16001750164011491750920175017501193110117501119175010441600160016008809751869160018401600160018171707Note:Allreactivity valuesinpcm23 TABLE3.1-3UNIT2SHUTDOWNMARGINParameter CcleNetRodWorth[(ARI-1)*0.9)HFPRequirement 566032805130323052105484547133603150315054093150590856264779274031292324RequiredShutdownMarginExcessShutdownMargin1600780160030016001600160025073472116006592000160016001168897855Note:Allreactivity valuesinpcm TABLE4'-1UNIT2CYCLE9EOLDINTOHOLDTARGETAODescription 100%RTP,ARO75%RTP,DinfortaretAO50%RTP,DinfortargetAO25%RTP,DinfortargetAOl.696l.64416031.6541.4231.4091.4441.483

~'

TABLE4.2-2UNIT2CYCLE9BOL85%RTP30STEPSFROMPDIL18+12RodPositionAROD8PDIL(160.7D8PDIL,H-88190.7D8PDIL,H-88130.7D9PDIL,GP29190.7D9PDIL,GP29130.7D8PDIL,GP18190.7D8PDIL,GP19130.7DeltaFDeltaFz,1.8322.0392.0272.0441.9542.1341.9702.1174.7%1.4751.4651.4931.4491.4901.4561.4401.4962.1%Notes1)ControlBankDLocations Group1:D4,D12,M12,M4Group2:H4,D8,H12,M8,HS2)DeltaF<6DeltaF~,isthepercentdifference betweenhighestvalueandvalueforthecasewithD-bankatPDIL

~~'I TABLE4.2-3UNIT2CYCLE9MOL85%RTP30STEPSFROMPDIL18+12RodPositionAROD8PDZL160.7D8PDZL,H-89190.7D9PDZL,H-89130.7D9PDZL,GP29190.7D9PDIL,GP29130.7D9PDZL,GP19190.7D9PDZL,GP19130.7DeltaFDeltaF~,1.7402.1822.1582.2062.0262.3262.0502.3066.6't1~4741.4741.4731.4751.4701.4831.4841.4750.7%27 I~

TABLE4.2-4UNIT2CYCLE9EOL85%RTP30STEPSFROMPDIL18+12RodPositionAROD8PDZL160.7D9PDZL,H-89190.7D9PDZLiH-89130.7D8PDZL,GP28190.7D9PDZL,GP28130.7D8PDIL,GP18190.7D9PDZL,GP19130.7DeltaFDeltaF>,1.6972.2252.1912.2532.0362.3892.0612'687.4%1.4091.4121.4241.4171.4151.4191.4101.4150.9%

TABLE4.2-5UNIT2CYCLE9EOL85%RTP30STEPSFROM215STEPS18+12RodPosh.tion AROD8215STEPSD8215,H-89231D9215,H-89185D8215,GP29231D8215,GP29185D9215,GP19231D8215,GPl8185DeltaFDeltaF>,l.6971.6401.6641.6071.6881.7591.654l.7277~3't1.4091.4041.4141.3961.4131.4031.4001.4422~7't TABLE4.2-6UNIT2CYCLE9BOL50%RTP30STEPSFROMPDIL18+12RodPositionD850%PDIL(94.5)C950%PDIL222.5DGC950'tPPDILDGP2964'DGC950'tPPDILDGP28124.5D&C950'tPPDILCGP28192.52.5972.6152.4792.7021.4891.5111.4761.495DeltaFDeltaF~4.0%1.5%30 41 TABLE4i2-7UNIT2CYCLE9EOL85%RTP30STEPSFROMPDIL18+12RodPositionAROD8PDIL160'D8PDIL,D-12 9130.7D8PDIL,K-14 9195.0D9PDIL,H-1281307D8PDIL,K-88195~01.6972.2252.2622.2452.2572.2391.4091.4121.4251.4181.4231.416DeltaFDeltaF~,17%0.9%31 I

TABLE4.2-8UNIT2CYCLE9EOL100%RTP24STEPSFROMPDIL12+12RodPositionAROD8PDIL189.0D9PDZL,H-89213D9PDIL,H-89165D8PDZL,GP28213D8PDZL,GP29165D8PDZL,GPl9213D8PDZL,GPl9165DeltaFDeltaF~,1.6962'692.0402.0991.90622201.9342.1987~3't1.4231.3961.4481~3911.4421.3921.3851.4213~7't32 TABLE4.2-9UNIT2CYCLE9EOL100'%TP27STEPSPROMPDIL15+12RodPosi.tion AROD8PDIL189D9PDIL,H-89216D9PDIL,H-89162D9PDIL,GP29216D8PDIL,GP28162D9PDIL,GP19216D8PDIL,GP19162DeltaFDeltaF~1.6962.0692.0352.1031.8912.2381.9212.2168.2%1.4231.3961.4531.3921.4471.3931.3871.4244.1%33 TABLE4.2-10UNIT2CYCLE9EOL100%RTP30STEPSFROMPDIL18+12RodPositionF&AROD8PDIL189D8PDIL,H-89219D9PDIL,H-88159D9PDILiGP29219D8PDIL,GP28159D9PDIL,GP19219D9PDIL,GP18159DeltaFDeltaFz,1.6962.0692.0332'061.8842.2541.9172.2308~9't1.4231.3961.4551~3921.4491.3541.3881.4264.2%

0tIll TABLE4.2-11UNIT2CYCLE9EOL100'%TP24STEPSFROM215STEPS12+12RodPositionAROD8215STEPSD8215,H-89231D9215,H-89191D8215,GP28231D9215,GP29191D8215,GP19231D8215,GP19191DeltaFDeltaF~,1.6961.7371.7321.7691.7131.90717201.8769.8%1.4231.4191~4281.3811.4271.3861.4161.4461.9%35 0EI TABLE4.2-12UNIT2CYCLE9EOL100%RTP30STEPSFROM215STEPS18+12RodPositionAROD8215STEPSD9215,H-89231D8215,H-89185D9215,GP29231D9215,GP29185D8215,GP19231D9215,GP18185DeltaFDeltaF~1.6961'371.7321'771.7131'451.7201.91112'%1.4231.4191.4281.3821.4271.3891.4161.45223%36

TABLE4.2-13UNIT2CYCLE9EOL100%RTP30STEPSFROMPDIL18+12RodPositionAROD8PDIL189.0D8PDIL,D-12 9159.0D8PDIL,K-14 8195.0D8PDIL,H-12 9159.0D8PDIL,K-89195.01.6962.0692.1092.0912.1072.0881.4231.3961.4051.4011.4001.394DeltaFDeltaF~,1.9%0.7%37 TABLE4.3-1UNIT2CYCLE9EOL100%RTP24STEPSFROMPDIL12+12LOAD-FOLLOW MODERodPositionD8PDIL189D8PDIL,H-89213D8PDIL,H-89165D8PDIL,GP29213D9PDIL,GP29165D9PDIZ,GPl9213D8PDIL,GP19165DeltaFDeltaF~<2.1081.6851.7431.6491.9041.6371.8121.67313.0%1.4091.4001.4421.4061.4341.4081.3961.4043.0%38 TABLE4.3-2UNIT2CYCLE9EOL100%RTP30STEPSFROMPDIL18+12LOAD-FOLLOW MODERodPosit'.on D8PDIL189D9PDIL,H-89219D9PDIL,H-88159D9PDIL,GP29219D8PDIL,GP29159D8PDIL,GP18219D8PDIL,GPl8159DeltaFDeltaFz,2.1081.6851.7641.6481.9621.6761.8441.67316.4%14091.4001.4531.4071.4451.4101.4001.4083.8%

TABLE4.3-3UNIT2CYCLE9EOL100%RTP30STEPSFROM215STEPS18+12LOAD-FOLLOW MODERodPositionAROD8215STEPSD8215,H-88185D8215,H-89231D9215,GP28185D8215,GP28231D6215,GP19185D8215,GPl9231DeltaFDeltaF~<2.1082.0441.9842.0731.8192.0991.9362.0552.7%1.4091~4031.3911.4151.4021.4131.4471.3983.1%

TABLE4.4-1UNIT1CYCLE13BOL85%RTP30STEPSFROMPDIL18+12STEPSRodPositionAROD8PDIL(160.7)D8PDIL,H-89190.7D9PDIL,H-88130.7D9PDIL,GP28190.7D8PDIL,GP29130.7D8PDIL,GP18190.7D8PDIL,GP19130.7D8PDIL,B109190o7D8PDIL,B109130i7DeltaFDeltaF~1.5561.7811.7561.8041.6711.8921.6971.8681.7591.8026.2%1.3811.4261.4301.4221.4191.4381.4151.4421.4411.4401.1%Note:ControlBankDLocations:

Group1:F2,B10,K14,P6Group2:B6,F14,P10,K2,H8 RODGROUPINSERTION LIMITSvs.POWERUNIT-2STEPS(0.545,231) 2004BANKC(1.0,189) 150,128)1004BANKD50(0)00'.20.40.60.8FRACTlONOFRATEDTHERMALPOWERFigure3.1-1 Figure4.l-2CONTROLANDSHOTDOMNRODLOCATIONS

'PNNLKJHGFE0CBA180'789O~9SASaDSCCDDSCDSD270SADSABDSEISDDSABANKSASBS8SABC0OoNUMBEROFRODCLUSTERS454I FIGURE4.1-1900COOKNUCLEARPLAN1UNIT2CYCLE9CORELOADINGPATIZRNRPNMLKJHGFEDC8AIIIIIII10810899118118118118118118911811811810A118911810A99108108910810811A'0A1,1810811A10A11811811810A10A1.1A11A10810A11A10A11A108.11A10810A'1811A11A118911810810811A10A10810A11A10A10A10A1189.10811A10810A118108'11A'0B118910811810B10A11A10A9118910410A11A118910A11810C1.1810A'0811A108118910A11810810811810811A10B31810811/'IOA11811830A1-1A11A10810A11A'0810A10A10A1081.1A10811A10A11A11A.10A108MB11A10A.1'IA10A11811810811891011A11A-111OA10A1181210A118911811899911810A11811810810891081181181181089-131181189991081500LEGENDRR:REGIONIDENTIFIER

~~II RODGROUPINSERTION LIMITSvs.POWERUNIT-3STEPS(0.545,231) 200~4BA(1.o,1sg) 150(o,12s)100rrr%BANKD5000(o,o)0.20.40.60.8FRACTIONOFRATEDTHERMALPOWERFigure3.1-2

FIGURE4.1-3D.C.COOKUNIT1CYCLE13CORELOADINGPATTERNRPN'lLKJHGFEDC8A13814A14814A14814A13813813814A15A15815815814814815A14A15815A14A14A15814815815A14815813814A13815A15813815814814A15A13815A14A15A15A14A14815A14814A13815A15A14A14A15A15815A148158138-514A15814813815A13A15A14A15A13A15A13814815814A.-614815A14A90o14A15814A14815A14A15A14A15A14814814A15A14A15A13A15813A15813A13815815813A15A14A15A14A15A14814814A15A14A15A14A15814A15A14A-81489148-714A15814813815A13A15A14A15A13A15A13814815814A-1013815814815A15815A14A15A14A15A13814A15A14814A14815A15A13814A15A15A14A14815815815A1381213814A13815814814815A15815814A15A"14A14A15815A14815814815815815A14A13813814A14814A14814A138LEGENDp0R':REGIONIDENTIFIER

"-46-'

Fi.gure4.1-4ControlRod'attern forOonaldC.Cook1RPNMLKJH180GFE0,CBAAbsorberMaterial'g-In-CdSA789010SgSASASOsASB27O'21314.15BANKSASBSCS~ACscOoSYMBOLNUMBEROFROOCLUSTERS8~848489 7."APPENDICES AppendixA:AppendixB:Unit;2,Cycle9ANCModelTechnical Specification Pages APPENDIXAUNIT2CYCLE9ANCMODELResultsoftheUnit2,Cycle9coredesignusingWestinghouse codesystemPHOENIX-P/ANC andmethodology arecomparedtomeasureddata.TheresultsfromtheZeroPowerPhysicsTestingaregiveninTablesA-l,A-2,andA-3.HFPcriticalboronobtainedfromANCwascomparedtothemeasuredcriticalboronandisshowninFigureA-l.Itshouldbenotedthatthesmalldeviation fromthedesigndataisduetotheboron-10depletion phenomena.

TheBOLandMOLradialassemblypowerdistributions aregiveninFigureA-2andA-3.ReviewofthesedataindicatethattheANCmodelisadequateforpowerdistribution analyses.

-49 TABLEA-1HZPMODERATOR TEMPERATURE COEFFIC1ENT Temperature MTC-MTC547F0.14pcm/'FTABLEA-2HZPRODWORTHMEASUREMENT Bank%ErrorCBD0.19CBC-3.02CBB-7.06CBA-4.79SBD-6.03SBC-4.92SBB-1.62SBA.-10.14TOTAL-3.86TABLEA-3HZPBORONENDPOINTMEASUREMENT BankCMeanCDeolyaBSARO6.9ppmCBDIn8.7ppm Unit2Cycle9BoronLetdownCurve1300120011001000*0~A0009008007006005004003002001000123CriticalBoron-DesignCurveMeasuredData456789101112131415161718Burnup(GWD/MTU)

FIGUREA-2D.C.COOKUNIT2CYCLE9BOCHFPPOWERDISTRIBUTION H0.8130.8060'07+1.3941.3820.0121.2541.2190.0351012131415l.1111.120-0.009+1.33513220.013+1.1251.0810.044+0.9740.980-0.006+1.2101.2070.0030.4120.426-0.014+1.2191.1680.051+1.1941.198-0.004+1.3051.2930.012+1.1331.139-0.006+1.1891.190-0.001+0.4110.419-0.0081.0141.032-0.0181.243'1.2330.0101.1321.0840.0481.1841.1780.006+l.1911.197-0.0060.4880.507-0.0191.1481.159-0.011-+1.2531.2490.004+1.0231.031-0.008-+1.1471.1470.000+0.3260.336-0.010D1.0031.004-0.001--+1.0721.102-0.030+0.9200.924-0.004+0.5000.517-0.0170.2560.267-0.011STANDARDDEVIATION

=0.020POWERLEVELCYCLEBURNUP100489MWD/MT1.1011.0980.003MAP209-10ANCDIFFERENCE 152 FIGUREA-3D.C.COOKUNIT2CYCLE9MOC90%RTPPOWERDISTRIBUTION H0.7710776-0.00510121314151.3361.3250.011+0.9680.973-0.005+1.3301.3190.011+10171.031-0.014+0.9050.925>>0.020+1.2521.2360.016+0.4490.464.-0.015+1.0381.055-0.0171.0221.0180.004+1.0961.105-0.009+1.3591.3390.0201'761.0750.0011.2671.2600.0070.4540.463-0.009+0.9460.947-0.0011.3731.3530.020+1.0691.079-0.010+1.1221.1160.0061.2701.2660.0040'450.556-0.011+1.1571.165-0.008+1.3621.372-0.010+1'101.013-0.003-+1.1671.177-0.010+0.3550.366-0.011D1.0271.035-0.008+1.2531.2420.0110.9280.9260.002+0.5760.583-0.0070.2920.303-0.011+STANDARDDEVIATION

=0.011POWERLEVEL904CYCLEBURNUP9247MWD/MT1.1011.0980.003MAP-209-28 ANCDIFFERENCE

-53 APPRNDIXBTECHNICMI SPECIFICATION PAGES REACTIVITY CONTROLSYSTEMS3413MOVABLECONTROLASSEMBLIES GROUPHEIGHTLIMITINGCONDITION FOROPERATION 3.1.3.1Allfulllength(shutdown andcontrol)rodsshallbeOPERABLEwithallindividual indicated rodpositions withintheallowedrodmisalignment oftheirgroupstepcounterdemandpositionasfollows:oforTHERMALPOWERlessthanorequalto85XofRATEDTHERMALPOWER,theallowedrodmisalignment isJ18steps,andoforTHERMALPOWERgreaterthan85XofRATEDTHERMALPOWER,theallowedrodmisalignment isJ12stepsorasdetermined fromFigure3.1-4.Figure3.1-4permitsforanallowedrodmisalignment from~13steps(forAPLequalto101X)to+18steps(forAPLgreaterorequalto106X)providedthevalueofR(definedinFigure3.1-4)isgreaterthanorequalto1.04.APPLICABILITY:

MODES1*and2*ACTION'.Withoneormorefulllengthrodsinoperable duetobeingimmovable asaresultofexcessive frictionormechanical interference orknowntobeuntrippable, determine thattheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1issatisfied within1hourandbeinHOTSTANDBYwithin6hours.b.Withmorethanonefulllengthrodinoperable ormisaligned fromthegroupstepcounterdemandpositionbymorethantheallowedrodmisalignment, beinHOTSTANDBYwithin6hours.c.Withonefulllengthrodinoperable duetocausesotherthanaddressed byACTIONa,above,ormisaligned fromitsgroupstepcounterdemandpositionbymorethantheallowedrodmisalignment, POWEROPERATION maycontinueprovidedthatwithinonehoureither:1.TheaffectedrodisrestoredtoOPERABLEstatuswithintheabovealignment requirements, or2.Theaffectedrodisdeclaredinoperable andtheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1issatisfied.

POWEROPERATION maythencontinueprovidedthat:a)Areevaluation ofeachaccidentanalysisofTable3.1-1isperformed within5days;thisreevaluation shallconfirmthatthepreviously analyzedresultsoftheseaccidents remainvalidforthedurationofoperation undertheseconditions, and*SeeSpecialTestExceptions 3.10.2and3.10.4COOKNUCLEARPLANT-UNIT13/41-18AMENDMENT NO.45,Q8,420 REACTIVITY CONTROLSYSTEMSLIMITINGCONDITION FOROPERATION Continued b)TheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1isdetermined atleastonceper12hours,andc)Apowerdistribution mapisobtainedfromthemovableincoredetectors andF~(Z)andF~areverifiedtobewithintheirlimitswithin72hours,andd)EithertheTHERMALPOWERlevelisreducedtolessthanorequalto75XofRATEDTHERMALPOWERwithinonehourandwithinthenext4hoursthehighneutronfluxtripsetpointisreducedtolessthanorequalto85XofRATEDTHERMALPOWER,ore)Theremainder oftherodsinthegroupwiththeinoperable rodarealignedtowithintheallowedrodmisalignment oftheinoperable rodwithinonehourwhilemaintaining therodsequenceandinsertion limitsasspecified intheCOLR;theTHERMALPOWERlevelshallberestricted pursuanttoSpecification 3.1.3.5duringsubsequent operation.

SURVEILLANCE REUIREMENTS 4.1.3.1.1 Thepositionofeachfulllengthrodshallbedetermined tobewithinthegroupdemandlimitbyverifying theindividual rodpositions atleastonceper12hoursexceptduringtimeintervals whentheRodPositionDeviation Monitorisinoperable, thenverifythegrouppositions atleastonceper4hours.4.1.3.1.2 Eachfulllengthrodnotfullyinsertedinthecoreshallbedetermined tobeOPERABLEbymovementofatleast8stepsinanyonedirection atleastonceper31days.4.1.3.1.3 Theallowedrodmisalignment forTHERMALPOWERgreaterthan85XofRATEDTHERMALPOWERshallbedetermined inconjunction withthemeasurement ofAPLasdefinedinSpecification 4.2.6.2.COOKNUCLEARPLANT-UNIT1P3/41-19AMENDMENT NO.420, ALLOWEDRODMISALIGNMENT ABOVE85%RTPFIGURE3.1-420STEPS19171615ApplicablewhenRL'I%LITo>1.04id'%TP13WereR=FN100101102103104105106107108APLCOOKNUCLEARPLANT-UNIT13/41-19bAmendment No.

REACTIVITY CONTROLSYSTEMSPOSITIONINDICATOR CHANNELSLIMITINGCONDITION FOROPERATION 3.1.3.2Allshutdownandcontrolrodpositionindicator channelsandthedemandpositionindication systemshallbeOPERABLEandcapableofdetermining therodpositions withintheallowedrodmisalignment specified inSpecification 3.1.3.1.APPLICABILITY:

MODES1and2.ACTION'.Withamaximumofonerodpositionindicator channelpergroupinoperable either:1.Determine thepositionofthenon-indicating rod(s)indirectly bythemovableincoredetectors atleastonceper8hoursandimmediately afteranymotionofthenon-indicating rodwhichexceeds24stepsinonedirection sincethelastdetermination oftherod'sposition, or2.ReduceTHERMALPOWERtolessthan50XofRATEDTHERMALPOWERwithin8hours.b.Withamaximumofonedemandpositionindicator perbankinoperable either:1.Verifythatallrodpositionindicators fortheaffectedbankareOPERABLEandthatthemostwithdrawn rodandtheleastwithdrawn rodofthebankarewithinamaximumoftheallowedrodmisalignment ofeachother,atleastonceper8hours,or2.ReduceTHERMALPOWERtolessthan50XofRATEDTHERMALPOWERwithin8hours.SURVEILLANCE REUIREMENTS 4.1.3.2Eachrodpositionindicator channelshallbedetermined tobeOPERABLEbyverifying thedemandpositionindication systemandtherodpositionindicator channelsagreewithintheallowedrodmisalignment atleastonceper12hoursexceptduringtimeintervals whentheRodPositionDeviation Monitorisinoperable, thencomparethedemandpositionindication systemandtherodpositionindicator channelsatleastonceper4hours.COOKNUCLEARPLANT-UNIT13/41-20AMENDMENT NO.~

POWERDISTRIBUTION LIMITSBASES34.22and3423HEATFLUXHOTCHANNELFACTORANDNUCLEARENTHALPYRISEHOTCHANNELFACTORThelimitsonheatfluxhotchannelfactor,andnuclearenthalpyrisehotchannelfactorsensurethat1)thedesignlimitsonpeaklocalpowerdensityandminimumDNBRarenotexceededand2)intheeventofaLOCAthepeakfuelcladtemperature willnotexceedthe2200'FECCSacceptance criterialimit.Eachoftheseismeasurable, butwillnormallyonlybedetermined periodically, asspecified inSpecifications 4.2.2.1,4.2.2.2,4.2.3,4.2.6.1and4.2.6.2.Thisperiodicsurveillance issufficient toensurethatthehotchannelfactorlimitsaremaintained provided:

a.Controlrodsinasinglegroup'movetogetherwithnoindividual rodinsertion differing bymorethan+18stepsfromthegroupdemandposition(allowedrodmisalignment:

)forpowerlevelslessthanorequalto85XofRATEDTHERMALPOWER.Forpowerlevelsgreaterthan85XofRATEDTHERMALPOWER,theallowedrodmisalignment isfromJ12to~18steps,whichisdependent ontheAllowable PowerLevelandtheratioofF~limitat100XofRATEDTHERMALPOWERtomaximummeasuredF~asindicated inFigure3.1-4.b.Controlrodgroupsaresequenced withoverlapping groupsasdescribed inSpecification 3.1.3.5.c~Thecontrolrodinsertion limitsofSpecifications 3.1.3.4and3.1.3.5aremaintained.

d.Theaxialpowerdistribution, expressed intermsofAXIALFLUXDIFFERENCE, ismaintained withinthelimits.Therelaxation inF~asafunctionofTHERMALPOWERallowschangesintheradialpowershapeforallpermissible rodinsertion limits.F~willbemaintained withinitslimitsasspecified intheCOLR,providedconditions (a)through(d)abovearemaintained.

WhenanF<measurement istaken,bothexperimental errorandmanufacturing tolerance mustbeallowedfor.5Xistheappropriate allowance forafullcoremaptakenwiththeincoredetectorfluxmappingsystem,and3Xistheappropriate allowance formanufacturing tolerance.

WhenF~~ismeasured, experimental errormustbeallowedfor,and4Xistheappropriate allowance forafullcoremaptakenwiththeincoredetection system.This4Xmeasurement uncertainty hasbeenincludedinthedesignDNBRlimitvalue.Thespecified limitforF~alsocontainsanadditional 4Xallowance foruncertainties.

Thetotalallowance isbasedonthefollowing considerations:

COOKNUCLEARPLANT-UNIT1B3/42-4AMENDMENT NO.M,IRAN, REACTIVITY CONTROLSYSTEMS3413MOVABLECONTROLASSEMBLIES GROUPHEIGHTLIMITINGCONDITION FOROPERATION 3.1.3.1Allfulllength(shutdown andcontrol)rodsshallbeOPERABLEwithallindividual indicated rodpositions withintheallowedrodmisalignment oftheirgroupstepcounterdemandpositionasfollows:oforTHERMALPOWERlessthanorequalto85KofRATEDTHERMALPOWER,theallowedrodmisalignment is+18steps,andoforTHERMALPOWERgreaterthan85XofRATEDTHERMALPOWER,theallowedrodmisalignment is~12stepsorasdetermined fromFigure3.1-4.Figure3.1-4permitsforanallowedrodmisalignment fromJ13steps(forAPLequalto101X)toJ18steps(forAPLgreaterorequalto106X)providedthevalueofR(definedinFigure3.1-4)isgreaterthanorequalto1~04.APPLICABILITY:

MODES1*and2*~CTION:a.Withoneormorefulllengthrodsinoperable duetobeingimmovable asaresultofexcessive frictionormechanical interference orknowntobeuntrippable, determine thattheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1issatisfied within1hourandbeinHOTSTANDBYwithin6hours.b.Withmorethanonefulllengthrodinoperable ormisaligned fromthegroupstepcounterdemandpositionbymorethantheallowedrodmisalignment, beinHOTSTANDBYwithin6hours.c.Withonefulllengthrodinoperable duetocausesotherthanaddressed byACTIONa,above,ormisaligned fromitsgroupstepcounterdemandpositionbymorethantheallowedrodmisalignment, POWEROPERATION maycontinueprovidedthatwithinonehoureither:1.TheaffectedrodisrestoredtoOPERABLEstatuswithintheabovealignment requirements, or2.Theaffectedrodisdeclaredinoperable andtheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1issatisfied.

POWEROPERATION maythencontinueprovidedthat:a)Areevaluation ofeachaccidentanalysisofTable3.1-1isperformed within5days;thisreevaluation shallconfirmthatthepreviously analyzedresultsoftheseaccidents remainvalidforthedurationofoperation underthese.conditions, and*SeeSpecialTest,Exceptions 3.10.2and3.10.3COOKNUCLEARPLANT-UNIT23/41-18AMENDMENT NO.40, REACTIVITY CONTROLSYSTEMSLIMITINGCONDITION FOROPERATION Continued b)TheSHUTDOWNMARGINrequirement ofSpecification 3.1.1.1isdetermined atleastonceper12hours,andc)Apowerdistribution mapisobtainedfromthemovableincoredetectors andF<(Z)andF~areverifiedtobewithintheirlimitswithin72hours,andd)EithertheTHERMALPOWERlevelisreducedtolessthanorequalto75XofRATEDTHERMALPOWERwithinonehourandwithinthenext4hoursthehighneutronfluxtripsetpointisreducedtolessthanorequalto85XofRATEDTHERMALPOWER,ore)Theremainder oftherodsinthegroupwiththeinoperable rodarealignedtowithintheallowedrodmisalignment oftheinoperable rodwithinonehourwhilemaintaining therodsequenceandinsertion limitsasspecified intheCOLR;theTHERMALPOWERlevelshallberestricted pursuanttoSpecification 3.1.3.6duringsubsequent operation.

SURVEILLANCE REUIREMENTS 4.1.3.1.1 Thepositionofeachfulllengthrodshallbedetermined tobewithinthegroupdemandlimitbyverifying theindividual rodpositions atleastonceper12hoursexceptduringtimeintervals whentheRodPositionDeviation Monitorisinoperable, thenverifythegrouppositions atleastonceper4hours.4.1.3.1.2 Eachfulllengthrodnotfullyinsertedinthecoreshallbedetermined tobeOPERABLEbymovementofatleast8stepsinanyonedirection atleastonceper31days.4.1.3.1.3 Theallowedrodmisalignment forTHERMALPOWERgreaterthan85XofRATEDTHERMALPOWERshallbedetermined inconjunction withthemeasurement ofAPLasdefinedinSpecification 4.2.6.2.COOKNUCLEARPLANT-UNIT23/41-19AMENDMENT NO.40, ALLOWEDRODMISALIGNMENT ABOVE85%RTPFIGURE3.1-420STEPS19161514AVVlicablewhenR>1.0413WereR=100101102103104105106107108APLCOOKNUCLEARPLANT"UNIT23/41-208Amendment No.

REACTIVITY CONTROLSYSTEMSPOSITIONINDICATOR CHANNELSLIMITINGCONDITION FOROPERATION 3.1.3.2Allshutdownandcontrolrodpositionindicator channelsandthedemandpositionindication systemshallbeOPERABLEandcapableofdetermining therodpositions withintheallowedrodmisalignment specified inSpecification 3.1.3.1.APPLICABILITY:

MODES1and2.ACTION'.Withamaximumofonerodpositionindicator channelpergroupinoperable either:1.Determine thepositionofthenon-indicating rod(s)indirectly bythemovableincoredetectors atleastonceper8hoursandimmediately afteranymotionofthenon-indicating rodwhichexceeds24stepsinonedirection sincethelastdetermination oftherod'sposition, or2.ReduceTHERMALPOWERtolessthan50KofRATEDTHERMALPOWERwithin8hours.b.Withamaximumofonedemandpositionindicator perbankinoperable either:I1.Verifythatallrodpositionindicators fortheaffectedbankareOPERABLEandthatthemostwithdrawn rodandtheleastwithdrawn rodofthebankarewithinamaximumoftheallowedrodmisalignment ofeachother,atleastonceper8hours,or2.ReduceTHERMALPOWERtolessthan50XofRATEDTHERMALPOWERwithin8hours.SURVEILLANCE REUIREMENTS 4.1.3.2Eachrodpositionindicator channelshallbedetermined tobeOPERABLEbyverifying thedemandpositionindication systemandtherodpositionindicator channelsagreewithintheallowedrodmisalignment atleastonceper12hoursexceptduringtimeintervals whentheRodPositionDeviation Monitorisinoperable, thencomparethedemandpositionindication systemandtherodpositionindicator channelsatleastonceper4hours.COOKNUCLEARPLANT-'UNIT23/41-21AMENDMENT NO.40 POWERDISTRIBUTION LIMITSBASES3422and342.3HEATFLUXHOTCHANNELFACTORANDNUCLEARENTHALPYRISEHOTCHANNELFACTORThelimitsonheatfluxhotchannelfactor,andnuclearenthalpyrisehotchannelfactorensurethat1)thedesignlimitsonpeaklocalpowerdensityandminimumDNBRarenotexceededand2)intheeventofaLOCAthepeakfuelcladtemperature willnotexceedthe2200FECCSacceptance criterialimit.Eachoftheseismeasurable butwillnormallyonlybedetermined periodically asspecified inSpecifications 4.2.2.1,4.2.2.2,4.2.3,4.2.6.1and4.2.6.2.Thisperiodicsurveillance issufficient toensurethatthelimitsaremaintained provided:

a.Controlrodsinasinglegroupmovetogetherwithnoindividual rodinsertion differing bymorethan~18stepsfromthegroupdemandposition(allowedrodmisalignment) forpowerlevelslessthanorequalto85XofRATEDTHERMALPOWER.Forpowerlevelsgreaterthan85XofRATEDTHERMALPOWER,theallowedrodmisalignment isfromJ12to~18steps,whichisdependent ontheAllowable PowerLevelandtheratioofF~limitat100XofRATEDTHERMALPOWERtomaximummeasuered F~asindicated inFigure3.1-4.b.Controlrodgroupsaresequenced withoverlapping groupsasdescribed inSpecification 3.1.3.6.coThecontrolrodinsertion limitsofSpecifications 3.1.3.5and3.1.3.6aremaintained.

d.Theaxialpowerdistribution, expressed intermsofAXIALFLUXDIFFERENCE, ismaintained withinthelimits.F~willbemaintained withinitslimitsasspecified intheCOLRprovidedconditions a.throughd.abovearemaintained.

Therelaxation ofF~asafunctionofTHERMALPOWERallowschangesintheradialpowershapeforallpermissible rodinsertion limits.Theformofthisrelaxation forDNBRlimitsisdiscussed inSection2.1.1ofthisbasis.WhenanF<measurement istaken,bothexperimental errorandmanufacturing tolerance mustbeallowedfor.5Xistheappropriate allowance onF<forafull,coremaptakenwiththeincoredetectorfluxmappingsystemand3Xif-theappropriate allowance formanufacturing tolerance.

COOKNUCLEARPLANT,-UNIT2B3/42-4AMENDMENT NO.8R, 8'REFERENCES 1.U.S.NuclearRegulatory Commission Letter,A.Schwencer (NRC)toJ.Dolan(AEP),October19,1979.2."ReducedTemperature andPressureOperation forDonaldC.CookNuclearPlant,Unit1-Licensing Report,"WCAP-11902/

October1988.3."Vantage5 ReloadTransition SafetyReportforDonaldC.CookNuclearPlantUnit2",Revision2,September 1990.4~5."PowerDistribution ControlandLoadFollowing Procedures,"

WCAP-8385, September 1974."ExxonNuclearPowerDistribution ControlforPressurized WaterReactors-Phase2,"XN-NF-77-57, January1978.6."ANC-AWestinghouse AdvancedNodalComputerCode",WCAP-10965-P-A, December1985.7."Qualification ofthePHOENIX-P

/ANCNuclearDesignSystemforPressurized WaterReactorCores"gWCAP11596@December1987.8."D.C.CookNuclearPlantUnit2Technical Specifications-AppendixAtoLicenseNo.DPR-74."9."D.C.CookNuclearPlantUnit1Technical Specifications-AppendixAtoLicenseNo.DPR-58."10."DonaldC.CookNuclear,PlantUnit2Cycle9,ReloadSafetyEvaluation",Revision 1,October199366 it.

ATTACHMENT 1TOAEP:NRC0692CVResponsetoRequestforAdditional Information Regarding GenericLetter92-08,"Thermo-Lag 330-1FireBarry.ers,"

pursuantto10CFR50.54(f)-DonaldC.CookNuclearPlant,Units1and2

'rT~

IsfCaAttachment 1toAEP:NRC:0692CV Page1Thenumberedresponses providedbelowcorrespond totheassociated numberedreporting requirement inthegenericletter.Thermo-Lag FireBarrierConfigurations andAmountsB.RequiredInformation 1.DescribetheThermo-Lag 330-1barriersinstalled intheplanttoa0b.C~d.e.meet10CFR50.48orAppendixRto10CFRPart50,supportanexemption fromAppendixR,achievephysicalindependence ofelectrical systems,meetacondition oftheplantoperating license,satisfylicensing commitments.

2~Forthetotalpopulation ofThermo-Lag firebarriersdescribed underItemI.B.1,submitanapproximation of:a0Forcabletraybarriers:

thetotallinearfeetandsquarefeetof1-hourbarriersandthetotallinearfeetandsquarefeetof3-hourbarriers.

b.Forconduitbarriers:

thetotallinearfeetof1-hourbarriersandthetotallinearfeetof3-hourbarriers.

C~Forallotherfirebarriers:

thetotalsquarefeetof1-hourbarriersandthetotalsquarefeetof3-hourbarriers.

'd~Forallotherbarriersandradiantenergyheatshields:thetotallinearorsquarefeetof1-hourbarriersandthetotallinearorsquarefeetof3-hourbarriers, asappropriate forthebarrierconfiguration ortype."

Attachment 1toAEP:NRCs0692CV Page2RESPONSEThermo-Lag firebarriersareinstalled inordertocomplywith10CFR50AppendixR,SectionIII.G.2.a andc.Severalofthese1-hourfirebarriersareinstalled toencloseintervening combustibles.

Thermo-Lag panelsarealsousedintheconstruction ofaradiantenergybarrierbetween10kVAisolimiter trains(nonAppendixRequipment locatedoutsidecontainment).

AsmallamountofThermo-Lag materialisusedonthestructural supportofAppendixRinstrumentation locatedinsidecontainment.

Neitheroftheseapplications isintendedasaratedfirebarrier.Thermo-Lag installations atCookNuclearPlantaretypically installed usingacombination ofpreformed panels,conduitpreshapes, andtrowelapplications.

Thermo-Lag materials areusedtowrapconduit,cabletray,pullboxes,andjunctionboxes.Thermo-Lag panelsareusedintheconstruction ofonefreestandingwallandtoprotectthehotshutdownpanelsineachcontrolroom.CookNuclearPlantusesonly12-inch-wide cabletrayswhicharesixinchesdeep.Insomelocations, uptofourtraysareinstalled sidebysideandenclosedtogetherwithinoneboxedenclosure.

Conduitsarewrappedwithconduitpreshapes inmostcases.Insomeareas,severalconduitsareenclosedinacommonboxedenclosure usingpreformed panels.Thermo-Lag paneljointsandconduitpreshapejointsareprebuttered andcoveredwithanadditional layeroftrowelgradematerial.

Racewayinterferences suchassupportsandnon-Appendix Rtraysandconduitsarewrapped18inchesfromthepointofcontactwiththeraceway.Descriptions ofeachThermo-Lag 330-1barrierinstalled inCookNuclearPlantanditsintendedpurposeareprovidedinAttachment

2.

Attachment 1toAEP:NRC:0692CV Page32.Thedataprovidedbelowisanestimation ofthetotallinearfeetandsquarefeetofThermo-Lag firebarriermaterials installed atCookNuclearPlantUnits1and2.Theapproximate squarefeetofcabletrayandotherfirebarriersisbasedupontheoutsidebarrierdimensions andincludesonlythatportionofafirebarrierthatcouldbeexposedtoafire.Forexample,foraverticalcabletraymountedagainstawall,thesideofthetrayadjacenttothewallisnotincludedintheapproximation ofsquarefeetfortheassociated firebarrier.Cabletraybarriers:

onehourbarriersare370linearfeetonehourbarriersare1850squarefeetthreehourbarriersare0linearfeetthreehourbarriersare0squarefeetb.Conduitbarriers:

onehourbarriersare930linearfeetthreehourbarriersare100linearfeetC~Otherfirebarriers:

onehourbarriersare120squarefeetthreehourbarriersare800squarefeetd~Otherbarriersandradiantenergyshieldss(Onenon-Appendix Rradiantenergyshieldlocatedoutsideofcontainment) totalsquarefootageis75

\I\~

Attachment 1toAEP:NRC:0692CV Page4"II.Important BarrierParameters B.ReiredInformation Statewhetherornotyouhaveobtainedandverifiedeachoftheaforementioned parameters foreachThermo-Lag barrierinstalled intheplant.Ifnot,discusstheparameters youhavenotobtainedorverified.

Retaindetailedinformation onsiteforNRCauditwheretheaforementioned parameters areknown.2~Foranyparameter thatisnotknownorhasnotbeenverified, describehowyouwillevaluatethein-plantbarrierforacceptability.

3~ToevaluateNUMARC'sapplication

guidance, anunderstanding ofthetypesandextentoftheunknownparameters isneeded.Describethetypeandextentoftheunknownparameters atyourplantinthiscontext."

RESPONSEThelistof24parameters ofimportance forutilities'se providedintherequestforadditional information isanexcerptfromaJuly1993NUMARCletter.Sincethattime,PhaseItestinghasbeencompleted andotherparameters ofimportance identified.

NUMARCprovidedalistof27parameters ofimportance inaJanuary14,1994,lettertoutilities.

PlannedNUMARCPhase2testingcouldidentifyfurtherparameters ofimportance, ordemonstrate thatsomeofthesepreliminary parameters arenotsignificant.

WhenthefinalcontentoftheNUMARCApplication Guideisfinalized andacceptedbytheNRC,wewilldetermine ifadditional parameter identification effortsarenecessary.

Wehaveconducted walkdowns ofeachinstallation toobtainorconfirmobservablc/

physicaldataanddeveloped as-builtsketcheswhereformaldrawingsdidnotexist.Thesesketchesanddrawings, togetherwithinstallation procedures andspecifications, addressamajorityofthe24barrierparameters listedinpartII.A.foreachinstallation.

Attachment 1toAEP:NRC:0692CV Page5Thefollowing parameters haveeithernotbeenobtainedorhavenotbeenverifiedforsomeinstallationss Parameter I8AirdropsSomeparameters internaltothefirebarriersystemhavenotbeenverifiedinallcases.Forexample,airdropdesignsareestablished byourdesignstandards.

However,ithasnotyetbeenverifiedthatcabletraytoconduitjunctions wereinstalled tothesestandards.

Parameter I9Baselinefirebarrierpanelthickness Panelthickness hasnotbeenverifiedforeveryinstallation.

Acheckofmaterialinstockandalimitedcheckofsomeinstalled panelsfoundthickness tobe0.625inches.Parameter f18ButtjointsorscoredandgroovedjointsTheinstallation procedure allowedfortheuseofbuttjointsorscoredjointsforcabletrayenclosures.

However,discussions withthesupervisor inchargeoftheThermo-Lag installations revealedthatvirtually allboxedenclosures usingThermo-Lag panelswereinstalled usingprebuttered buttjointsduetolimitedworkingspaces.Walkdowns haveconfirmed thisinstallation technique wherethejointwasvisible.2~Parameters ofimportance thatarenotpresently knownorverifiedwillbeevaluated usingoneormoreofthefollowing options:assumelimitingconditions, e.g.,pre-buttered buttjointsversusscoreandfoldjoints,b.reviewsofcontractor workpractices andprocedures throughdocumentation ortestimony, Ily Attachment 1toAEPsNRC:0692CV Page6c~reviewofreceiptinspection andinstallation documentation, d.destructive examination ofbarriersonasamplebasistoobtaininformation onconstruction techniques ormaterialthickness, ore.visualobservations whereappropriate.

Yourletteralsoprovidesaneightitemlistingofparameters ofimportance concerning cableprotected byfirebarriers.

Itisnotclearthatconsideration oftheseparameters wouldbenecessary formostbarriers; therefore, significant effortstoobtainthelistedparameters, ordescribehowbarrierswillbeevaluated inabsenceoftheseparameters, maybeun)ustified.

Totheextentthatfiretestresultsaresatisfactory onthebasisoftemperature, asprovidedforinthedrafttestandacceptance

criteria, webelieveresearching, atthistime,fortheNRClistingofcableperformance parameters tobeevaluated shouldbelimitedtothepercentage cablefillincabletrays(subsetofitem4oftheNRC8itemlisting),

whichrelatestoenclosedthermalmassandbarrierperformance.

Consideration oftheremaining listedcableparameters (items1,2,3,5,6,7and8)willbedeferreduntilthescopeofcablefunctionality verification becomesclear.Webelievethisinterpretation ofthereporting requirements ofyourletterisconsistent withtheguidanceprovidedbytheNRCviaourtelephone conversation withNRRStaffonJanuary12,1994,onthistopic.Iffiretestsdemonstrate temperature criteriaexceedances, oneoptionalapproachtoresolution, asprovidedintheNRCdrafttestandacceptance

criteria, wouldbetoevaluatecablefunctionality attheelevatedtemperatures.

Inthiscase,determination ofcableperformance atelevatedtemperature (item8)wouldbenecessary, usingcableperformance testdataorinformation forspecificinstalled cabletypes(items1,2,3gand7oftheNRClisting).

However,NRChasyettofinalizerequirements forcable LLII~I' Attachment 1toAEP:NRC:0692CV Page7functionality evaluation, noraretestresultsyetavailable thatwouldclearlyindicatethescopeofsuchevaluations.

Thedegreeandconservatism ofcablefunctionality evaluation requirements impliedbytheNRClistingofcableparameters, anddiscussed inproposedSupplement 1toGeneric'etter86-10,significantly exceedtheoriginalrequirements ofGenericLetter86-10.Ztems4,5,and6oftheNRClistingaddressissuesrelativetopotential cable/barrier contactforcabletrays.Thisisanunresolved industryissueatthistime,andbarrierinspection inthisregardwouldbedifficult orimpossible.

Barriercontactwouldbemostlikelytooccurinsituations oflargecablefills.However,thelargecablefillsalsoprovidesignificant thermalmassthatcouldimprovebarriersystemperformance andmitigatetheeffectofcablesincontactwiththebarrier.NUMARChasagreedtoprovideadditional thermocouples, belowthecabletrayrungsinthePhase2cabletrayteststoprovideinformation toaddressNRCconcernsrelativetopotential contactofcableswiththecoldsideofthefirebarriers.

Further,notethatasmallpieceofSealtempcloth(NRCitem6)wasusedonlyinNUMARCtestNumber1-4(24"steelcabletraywithairdrop,,three hourtest),anddidnotimpactperformance'r useability ofthetest.Potential cable/barrier contactisnotexpectedforCookNuclearPlantcabletraysduetothetypeoftrayused.Thesetrayshaveacontinuous expandedmetalbottomwhichwouldpreventanycablesagging.Nosignificant saggingofthe'topportionofthefirebarrierislikelysincetraysareonlytwelveincheswide.3.Seeresponseto1and2above.

I~r IrW~IAttachment 1toAEP:NRC:0692CV Page8"III.Thermo-La FireBarriersOutsidetheScoeoftheNUMARCProcrramB.RequiredInformation Describethe,barriersdiscussed underItemI.B.1thatyouhavedetermined willnotbeboundedbytheNUMARCtestprogram.2~Describetheplant-specific corrective actionprogramorplanyouexpecttousetoevaluatethefirebarrierconfigurations particular totheplant.Thisdescription shouldincludeadiscussion oftheevaluations andtestsbeingconsidered toresolvethefirebarrierissuesidentified inGL92-08andtodemonstrate theadequacyofexistingin-plantbarriers.

3.Ifaplant-specific fireendurance testprogramisanticipated, describethefollowing:

a~Anticipated testspecimens.

b.Testmethodology andacceptance criteriaincluding cablefunctionality."

RESPONSESeveralThermo-Lag configurations existatCookNuclearPlantwhicharedifferent fromthosecurrently includedinthescopeoftheNUMARCtestprogram.Someadditional barriersmayfalloutsideoftheexpandedNUMARCtestprogramdepending upontheconfigurations testedandthefinalcontentoftheApplication Guideline.

Configurations currently believedtobeoutsidetheNUMARCprogramcanbedividedintocableracewaybarriersandnoncableracewaybarriers.

Thefollowing providesadescription ofeachofthesebarriers.

CableRacewaBarriersaeInsomecases,twoormore12inchwidecabletrayswereinstalled sidebysideatCookNuclearPlantratherthanusinga24inchor36inchwidetray,asusedintheNUMARCtestingconfigurations.

Inseveralcases,four12inchwidetrays Attachment 1toAEP!NRC:0692CV Page9wereinstalled inthismannerandprotected witha48inchwideboxedenclosure constructed ofThermo-Lag, panels.b.Severalirregularly shapedboxed'enclosures wereinstalled atCookNuclearPlantasfirebarriersforcabletrayjunctions.

Fortheseconfigurations, ametalpanwasfabricated inthefieldtoaccommodate the)unctionofseveralcabletrays.Thesepanswerefabricated invarioussizessuchas5feetby2feetand3.5feetby3.5feet.TheThermo-Lag enclosures protecting thesepanswereconstructed usingtechniques similartothoseusedforcabletrayswiththeexception thatboltswereusedtoconnectthebottomThermo-Lag panelstothepanstoprovidesupportforthepanels.C~Thermo-Lag panelswereusedtoconstruct three-hour firebarriersaroundseveralpilasters inthedieselgenerator rooms(FireZones15and19).Thepilasters areofconcreteconstruction andarephysically apartofthedieselgenerator roomwalls.Eachpilastercontainsseveralconduitswhichhavebeenembeddedbelowapproximately twoinchesofconcrete.

Twolayersofapproximately onehalfinchthickThermo-Lag panelswereattachedtotheoutsideofeachpilaster.

~NonCableRacewaBarriersd0Awallconstructed toseparate(i.e.,provideafirebarrierbetween)thecomponent coolingwater(CCW)pumpsconsistsoftwo1/2inchthickThermo-lag panelsseparated bya1/4inchthickexpandedmetalstiffener.

Thewallisapproximately 36feetlongand78incheshigh.TheThermo-Lag panelswereoverlapped toprovideprotection fortheboltsattaching thepanelstothemetalstuds.

~)0 Attachment 1toAEP:NRC:0692CV Page10e.Thehotshutdown(HSD)panelswereoriginally i.nstalled tocomplywiththerequirements of10CFR50,AppendixAGeneralDesi.gnCri.terion 19,andareusedtoprovideshutdowncapability fromoutsidethecontrolroomfordesignbasisconsiderations otherthanAppendixRfires.TheUnit1HSDpanelisintheUnit2controlroomandtheUnit2HSDpanelisintheUnit1controlroom.TheHSDpanelsaresteelenclosures approximately 12feet6incheswide,5feetdeepand8feethigh.A3-hourfirebarrierwasconstructed aroundtheHSDpanelstoensurethatfiresexternaltothepanelsdonotdamageinternalwiringandfiresinternaltothepaneldonotspreadoutside.Thewallswereconstructed ofconcreteblockandsteelcolumnswithaThermo-Lag trowelgradecoatingonthesteelmembers.Theroofwasconstructed inamannersimilartotheCCWpumproomwallinthattwoapproximately 1/2i.nchthickThermo-Lag panels,separated andstiffened byexpandedmetal,weremountedonsteelbeamsanchoredtothetopoftheblockwall.Accesstoeachpanelisviaasteelroll-upfiredooracrossthefrontofthepanel.Asupplemental

response, whichidentifies cableracewaybarriersoutsidetheNUMARCprogramscope,willbeprovidedtotheNRC.Thisresponsewilltakeintoconsideration theresultsofNUMARC'sexpandedgenerictestprogramifundertaken.

NUMARCisalsoinitiating actionstofacilitate sharedtestingofinstallations thatcannotbepractically considered underthegenericprogramscopebutmaybecommontoseveralfacilities.

Ztisexpectedthatamatrixofsharedtestscouldbedeveloped andprovidedtotheindustry.

NUMARCisscheduled toprovideadditional information toutilities inthisregardbyApril1,1994.Therefore, asupplemental responsewillalsobeprovidedfornoncableracewaybarrierswhichwilltakeintoconsideration thepotential forfutureplantspecificorsharedtesting.

Attachment 1toAEP:NRC:0692CV Page11Thesupplemental responsetoItemZZI.B.1willbeprovidedtotheNRCwithin60daysfollowing receiptoftheNUMARCApplication Guideline.

263.Theplant-specific plantobeusedforevaluation oftheaboveconfigurations hasnotbeenestablished atthistime.Thisplanwillbelargelydependent onwhetherornotthescopeoftheNUMARCtestprogramwillbeexpandedtocoversomeoralloftheaboveconfigurations.

NUMARChasstatedthatadditional information willbeprovidedtoutilities inthisregardbyApril1,1994,andtheApplication Guideline willbefinalbymid-April 1994.OurresponsetoItemsZZI.B.2andZII.B.3willbeprovidedtotheNRCwithin60daysfollowing receiptoftheApplication Guideline.

Thiswillallowtimetoassessthefinalgenericprogramscope,andthepotential forsharedtesting,bothofwhichcouldreduceoreliminate theneedforplantspecificcorrective actions,particularly firetesting."IV.AmacitDeratinB.Recpxired Information Forthebarriersdescribed underItemI.B.1,describethosethatyouhavedetermined willfallwithinthescopeoftheNUMARCprogramforampacityderating, thosethatwillnotbeboundedbytheNUMARCprogram,andthoseforwhichampacityderatingdoesnotapply.2.Forthebarriersyouhavedetermined fallwithinthescopeoftheNUMARCprogram,describewhatadditional testingorevaluation youwillneedtoperformtoderivevalidampacityderatingfactors.3.Forthebarrierconfigurations thatyouhavedetermined willnotbeboundedbytheNUMARCtestprogram,describeyourplanforevaluating whetherornottheampacityderatingtestsrelieduponfortheampacityderatingfactorsusedforthoseelectrical components protected byThermo-Lag 330-1(forprotecting thesafe-shutdown capability fromfireortoachievephysicalindependence of Attachment 1toAEP:NRC:0692CV Page12electrical systems)arecorrectandapplicable totheplantdesign.Describeallcorrective actionsneededandsubmitthescheduleforcompleting suchactions.4.IntheeventthattheNUMARCfirebarrier'estsindicatetheneedtoupgradeexistingin-plantbarriersortoreplaceexistingThermo-Lag barrierswithanotherfirebarriersystem,describethealternative actionsyouwilltake(andthescheduleforperforming thoseactions)toconfirmthattheampacityderatingfactorswerederivedbyvalidtestsandareapplicable tothemodifiedplantdesign."RESPONSEIntheearly1980's,weexpandedourampacityderatingprogramtoconsiderThermo-Lag installations atCookNuclearPlant.Thisprogramwasappliedtoallwrappedcableracewayscontaining powercables.Acomputermodelwasdeveloped basedonAmericanInstitute ofElectrical Engineers (AIEE)transaction paper57-660,byNeher,McGrath,andBullertocalculate thetemperature riseintheconductor, heatgeneration perfoot'ofraceway,andampacity.

Themodelconsiders thatallcablesintheracewaywereenergized withthemaximumsteadystatecurrent.Atestprogramwasdeveloped tovalidatethecomputermodel.Aseriesoftestrunssimulating representative as-builttrayandconduit,configurations wereconducted atourCantonTestLab.Theresultsofthetestsvalidated theanalytical computermodel.Thetestingwasconducted underrigidlaboratory

controls, withtestprocedures, andwithengineering supervision andreview,however,itwasnotundertheauspicesofa10CFR50AppendixBqualityassurance program.

Attachment 1toAEP:NRC:0692CV Page13Thecalculations usingthiscomputermodelconfirmed thatthecableracewaydesignatCookNuclearPlantincludedsufficientmargintoaccommodate thetemperature riseresulting fromwrappingracewayswithThermo-Lag.

Wedonotbelievethatanyadditional testingorevaluation isnecessary toderivevalidampacityderatingfactorsforthesecableracewaysinstalled atCookNuclearPlant.WewillreviewtheNUMARCprogramforampacityderatingwhenitismadeavailable.

Intheeventthatfirebarriertestsindicatetheneedtoupgradeexistingin-plantbarriersortoreplaceexistingThermo-Lag barrierswithanotherfirebarriersystem,wewillmakeadetermination astowhethertouseNUMARC'sampacityderatingprogramorourownprogram.WewillinformtheNRCoftheampacityprogramtobeusedforfirebarrierupgradesorreplacements within90daysfollowing receiptoftheNUMARCAmpacityTestReport.~IgAlternatives B.RequiredInformation Describethespecificalternatives available toyouforachieving compliance withNRCfireprotection requirements inplantareasthatcontainThermo-Lag firebarriers.

Examplesofpossiblealternatives toThermo-Lag basedupgradesincludethefollowing.

Upgradeexistingin-plantbarriersusingothermaterials.

2~ReplaceThermo-Lag barrierswithotherfirebarriermaterials orsystems.3~Reroutecablesorrelocateotherprotected components.

4,Qualify3-hourbarriersas1-hourbarriersandinstalldetection andsuppression systemstosatisfyNRCfireprotection equipment."

llll+~lc0 Attachment 1toAEP:NRC:0692CV Page14RESPONSETheselection ofspecificalternatives available forachieving compliance withNRCfireprotection requirements inplantareasthatcontainThermo-Lag firebarrierswilldependonanumberoffactors.Threecurrently undefined factorsmustbeconsidered indetermining whetherupgradesusingadditional Thermo-Lag materials arepractical, andwhatalternatives wouldbemostappropriate incaseThermo-Lag upgradescannotbedeveloped.

Testandacceptance criteriahavenotbeenfinalized andissuedbyNRC.Proposeddraftcriteriacontainnewconservatism infiretestmethodsandacceptance criteriathatcouldaffectthescopeandcomplexity ofupgradestoinstalled barriers.

Thecontentofthefinalcriteria, andtheresulting impactonutility-specific actionplans,isuncertain.

2.CompletePhase2testsresultswillnotbeknownuntilthemid-March timeframe.Resultsofbaseline(asinstalled) andupgradedtestconfigurations fromPhase2mustbeconsidered todetermine appropriate utilityactionplanstoaddressspecificconfigurations.

Moreover, furthergenerictestingmaybeundertaken following Phase2,asnotedpreviously.

3.TheNUMARCApplication Guideline, tobefinalized bymid-April, willincludeamatrixofimportant performance parameters andboundingconditions.

Discussion withNRCwillbenecessary toreachagreement ontheselection ofcomparison parameters andboundingconditions.

TheresultsoftheseNRCinteractions willdefinethefinalcontentandwoulddirectlyimpactthegenericapplicability ofagiventesttoaninstalled configuration.

Attachment 1toAEP:NRC:0692CV Page15Yourletterprovidesonlyapartiallistingofresolution alternatives.

Threeadditional alternatives areprovidedbelow.Otherresolution alternatives maybepossible.

Further,"it shouldbenotedthatimplementation ofalternative solutions maybeconsidered evenifupgradeshavebeensuccessfully tested.Potential alternatives includethefollowing.

1~Re-evaluation ofengineering analysesusedfordetermination ofAppendixRsafeshutdownpathways, equipment, andactions,couldprovideabasisforreduction inthescopeofprotected circuitsandtheirassociated firebarriers.

2~Exemption requestscouldbesubmitted basedupontheuseoffiremodelingincon)unction withbaseline(non-upgraded) testresultstodemonstrate adequateprotection fortheinstalled hazard.Inconjunction withtheabove,probabilistic safetyanalysis(PSA)couldbeusedasanexemption basis,bydemonstrating insignificant coredamagefrequency impacts,assumingbarrierinoperability.

3.Re-evaluation oflicensing commitments thatmayexceedtherequirements ofpertinent regulations maybeundertaken.

Duringourreviewofthisissue,wenotedthatseveralconduitsandcabletrayswhichwerewrappedwithThermo-Lag materials nolongerrequireprotection fromfire.Thisconclusion wasmadepossiblebyacombination ofdesignchangesandtheremovalofseveralcomponents fromthelistofsafeshutdownequipment.

Theneedtoretainexistingfirebarrierinstallations willcontinuetobeevaluated asapartofourongoingefforttorevalidate ourcurrentsafeshutdownanalysis.

Attachment 1toAEP:NRC:0692CV Page16"VI.Schedules B.RequiredInformation Submitanintegrated schedulethataddresses theoverallcorrective actionschedulefortheplant.Ataminimum,thescheduleshouldaddressthefollowing aspectsfortheplant:implementation andcompletion ofcorrective actionsandfirebarrierupgradesforfirebarrierconfigurations withinthescopeoftheNUMARCprogram,2~implementation andcompletion ofplant-specific

analyses, testing,oralternative actionsforfirebarriersoutsidethescopeoftheNUMARCprogram."

RESPONSEBecauseoftheuncertainties notedintheabovediscussion ofNRCItemsIIIandVabove,submittal ofanintegrated schedulethataddresses theoverallcorrective actionprogramfortheplantisnotpossibleatthistime.WhilethescopeoftheNUMARCtestprogramforPhase1and2isknown,whatwillultimately be"bounded" isafunctionoftheoutcomeofthetests,andthefinalcontentoftheApplications Guide.Inaddition, NUMARCisconsidering anexpansion oftheplannedtestprogramscope.Considerable information concerning theresultsofcurrently plannedNUMARCtests,expansion oftheNUMARCtestprogram,andthecontentoftheApplications Guidewillbecomeavailable inApril.Thisinformation willdirectlyimpacttheoverallcorrective actionscheduleforCookNuclearPlant.Wewillprovidetherequiredscheduleinformation totheNRCwithin60daysfollowing receiptoftheApplication Guideline.

"VII.SourcesandCorrectness ofInformation Describethesourcesoftheinformation providedinresponsetothisrequestforinformation (forexample,fromplantdrawings, qualityassurance documentation, walkdowns orinspections) andhowtheaccuracyandvalidityoftheinformation wasverified."

Attachment 1toAEP:NRC:0692CV Page17RESPONSENumerousdifferent sourceswereemployedtoprovidetheresponsetothisrequestforinformation.

Ama)orityoftheinformation concerning firebarrierdescriptions andparameters wascontained inThermo-Lag installation piocedures andspecifications andverifiedthroughfieldwalkdowns.

Othersourcesofinformation thatwereconsulted includequalityassurance documentation contained indesignchangepackagesunderwhichtheThermo-Lag firebarrierswereinstalled, designdrawingsofspecificfirebarriers, anddiscussions withcontractor personnel responsible forThermo-Lag installation.

Ourampacitytestingwasconducted underrigidlaboratory controlsg withtestprocedures, andwithengineering supervision andreview;however,itwasnotundertheauspicesofa10CFR50AppendixBqualityassurance program.

IIIig00, ATTACHMENT 2TOAEP:NRC:0692CV ResponsetoRequestforAdditional Information Regarding GenericLetter92-08,"Thermo-Lag 330-1FireBarriers,"

pursuantto10CFR50.54(f)-DonaldC.CookNuclearPlant,Units1and2Descriptions ofThermo-Lag 330-1BarriersInstalled inCookNuclearPlant AEP:NRC:0692CV Attachment 4Pagelof~BarrierNo.~~FireRatingEnclosedracewayConduit{C)/Tray{T)

Size{inches)Barrierlength(ft)23Description Area(sq.ft)-c"PiPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowBarrierNo.Enclosedracewayco-(FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)/0Area(sq.ft)A'8Description AZMIc'c=Z)/75EZWdPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described below AEP:NRC:0692CV Attachment f2Page?of~3BarrierNo.~~EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Area(sq.ft)Description PRC7-AB/Wrw2OPurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowBarrierNo.EnclosedracewayB-/FireRatingConduit(C)/Tray(T)

Size(inches)t'z~z~zQ2~YBarrierlength(ft)Description Ru7--C'c.Area(sq.ft)S'~o~oj=aWCfgMoBUDZoPurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 4Pageof~BarrierNo.EnclosedracewayoxP-ZR"FireRaCingConduit(C)/Tray(T)

/aRSize(inches)t~ZwZMgBarrierlength(ft)Description Cc,cKcMCCCSLYArea(sq.ft)W/MBTD~r/oP~c'ffSec'QPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowBarrierNo.EnclosedracewayPut.cBo7-ZRP82FireRatingConduit(C)/Tray(T)

/RSize(inches)Bb&-SCZQ4.zBarrierlength(ft)Description C.Area(sq.ft)EnJcccosczdsFOPz-ZP8-9Purpose~Physicalindep'endence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

AEP:NRC:0692CV Attachment 42PageWof38BarrierNo.EnclosedracewayFireRating/A'8Conduit(C)/Tray(T)

Size(inches)Area(sq.ft)Description PwCI=A821CA.

IEDwcRDiCSw~rIzM3D=Cc~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowBarrierNo.EnclosedracewayFireRatingConduit(C)/Tray(T) f-lg+Size(inches)Barrierlength(ft)Description p3Area(sq.ft)=FR-(cAML=zoC'u'IgacPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baaeduponfieldwalkdowns AEP:NRC:0692CV Attachment 4~Page~of~~BarrierNo.~~Enclosedraceway7Z-/FireRatingConduit(C)/Tray(T)

Size(inches)C./Barrierlength(ft)Description 3cr'A3C/0Area(sq.ft)~Z%Awe<Zoreomgoa'/r8~e9Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.28EnclosedracewayFireRatingConduit(C)/Tray(T)Size(inches)Barrierlength(ft)'escription C'onrc/ZArea(sq.ft)Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described below4Note:Dimensions providedareestimates baseduponfieldwalkdowns

AEP:NRC:0692CVAttachment 0P-Page4ofD8BarrierNo.EnclosedracewayMC<FireRatingI-//8Conduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description CuuArea(sq.ft)7/cWPurposeX'hysical independence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.Enclosedraceway8PSR.FireRating/-4RConduit(C)/Tray(T)

Size(inches)C.Barrierlength(ft)Description CnJJDArea(sq.ft)/7BR~AAH~~PurposeXPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baaeduponfieldwalkdowns AEP:NRC:0692CV Attachment 0RPage~of~BBarrierNo.~~FireRating/-Wi8Enclosedraceway8-rv+a-~Conduit{C)/Tray(T)

Size(inches)Barrierlength{ft)Description

~4MrOA/iArea(sq.ft)~~WAj~w~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.PireRatingEnclosedracewayae-c'9Barrierlength(ft)Conduit{C)/Tray{T) 7Area(sq.ft)Size(inches)IZrZ~Z~Z.reDescriptionTwasvgYZC-g-C/+Z~/PIZ'~7~+

c-ls(D-c.-L.AOA3RDPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

~.Jt AEP:NRC-0692CV Attachment 42PagePof~BarrierNo.EnclosedracewayGeozB-Z,FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)7Ccovn).Area(eg.ft)8'>3)Description

~ST.94EZ/0IPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.Enclosedraceway8'do~Z->FireRating(Conduit(C)/Tray(T)

CSize(inches)Barrierlength(ft)Description Area(sq.ft)hf~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attach<gent 4Page"fof~~~BarrierNo.SA'nclosed racewaysocoG-zEood5-ZSZ&adI-2&oPeaFireRatingConduit(C)/Tray(T)

CCCSize(inches)Barrierlength(ft)/SArea(sq.ft)A/ADescription V~Ie/vsLw&MDw&zowL)~-eea&cNa~i=PurposeYPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.5BEnclosedraceway8G-FireRatingConduit(C)/Tray(T)

CSize(inches)Barrierlength(ft)/'6Description CeveVM~/CA/~i/.r+H~t=//S/C'KArea(sq.ft)GZ)oC'cmic~~8DLap/~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns JJ AEP:NRC:0692CV Attachment 4Page~Oof~8BarrierNo.~~EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)O'-GPAzea(sq.ft)Description

~i~zuI<>+<>~>+~u<>+>><44<<~n/v+tcAtL~M~TZ<1Lt/C~-/7P"are'g7SZd<S.Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EnclosracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafetdownsystemsEnclosure ofintervening combustibles forApdixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment f2Page~(of~~~BarrierNo.d4FireRating/&'REnclosedracewayConduit(C)/Tray(T)

Size(inches)/2Barrierlength(ft)Area(sg.ft)sO4//Description rh'Z-d2sA.]2VER'rIcal7eav>zggAvgsAJCVALLc=.D 4ikz-co4-PPi27RAY5UC48CLW5QPc=Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EnclodracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sg.ft)PurposePhysicalindependence ofAppendixRsafhutdownsystemsEnclosure ofintervening combustibles forendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:,Dimensions providedareestimates baseduponfieldwalkdowns

'lJ AEP:NRC-0692CV Attachment 4~Page~2ofARBarrierNo.7A'~FireRating/0REnclosedracewayConduit(C)/Tray(T)Size(inches)Barrierlength(ft)//.3Description Causa'zv~~HAArea(sq.ft)A'rfPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.EnclosedracewayConduit(C)/Tray(T)

Size(inches)FireRating/NNBarrierlength(ft)Description Area(sq.ft)WAPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed'n AppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns JI9IAEP:NRC:0692CV Attachment 02.Page~of~BarrierNo.FireRatingEnclosedraceway,Conduit(C)/Tray(T)

Size(inches)3C7-ro'IDescription coloi,LSArea(sq.ft)7aZPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EncloracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafehutdownsystemsEnclosure ofintervening combustibles forAendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 4~Page~ofZRBarrierNo.8'A~~FireRatingf'b8EnclosedracewayConduit(C)/Tray(T)

Size(inches)Barrierlength{ft)rGDescription 5c'caHoArea{sq.ft)sz-PAdezsPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.FireRatingEnclosedracewayConduit(C)/Tray(T)

Size(inches)'7GH-/)~<5Description

~~isE<3eDcIc57etP.cuArea(sq.ft)IfoA3iZ/7cMSPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

AEP:NRC:0692CV Attachment 0+Page/of~BarrierNo.P~~~FireRatingD4R'nclosed racewayConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description uu/L857Area(sq.ft)C-.WZCDD&0A/D~WQHC~UClPGFLAs7Co&-~r~~~c~Vw~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption request,Otherreason,described belowBarrierNo.FireRatingDff'NEnclosedraceway8~o2'-IQ~o(ooZR-(.8'3'E-1o6-(Pease,-rConduit(C)/Tray(T)

C'C.Size(inches)Barrierlength(ft)Description univ-ssPLISPv'MNmPA3=zNArea(sq.ft)mCoc=VL,n%cooPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns I

I1IAEP:NRC:0692CV Attachment 4P-page/&of~BarrierNo.EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Area(sq.ft)Description ARMTc.ZO<ice+C,CSMPurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixR~Discussed inAppendixRexemption request.Otherreason,described belowrierNo.EnclosracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)Purposephysicalindependence ofAppendixRsafehutdownsystemsEnclosure ofintervening combustibles forendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 4P-Page~lofZ~BarrierNo.'04EnclosedracewayFireRatingConduit.(C)/Tray(T)

Size(inches)Barrierlength(ft)Area(sq.ft)P.g844ll'(ZDAURL5)

Description EnJCz05~ILLSC/CzASISr5HC'owe'RcWZ'LY v"sPv'h'4'<&'PAGc.P~6MAC.SF/FPEhfc=

R~PurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EncloracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafeutdownsystemsEnclosure ofintervening combustibles forAendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdovns AEP:NRC:0692CV Attachment f~Page~ofBS'arrier No.//AEnclosedracewayPsoR-(FireRating/H'RConduit(C)/Tray(T)

Size(inches)CC.0Barrierlength(ft)Description dca&uj7-8FtlLc.urH'cMIPpeMrs//APEWHgPhM.Purpose)CPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption request,Otherreason,described belowBarrierNo.Enclosedraceway7P-FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)PArea(sq.ft)Description Coarct27"MWA%PcZO~rvg~~$/ggP~,ITPMKPAcCPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment f2Page/'/of3~BarrierNo.//MFireRating/ACEnclosedraceway&55G-2'PclCLConduit(C)/Tray(T)

Size(inches)/eABarrierlength(ft)Area(sq.ft)Description bFchlDCC/7R/7P'P'/'/hPurposeXPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EncloracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafestdownsystemsEnclosure ofintervening combustibles forAppdixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment.

4P-Page2>of~BarrierNo.EnclosedracewayQBZ-CVOFireRatingConduit(C)

/Tray(T)Size(inches)Barrierlength(ft)~Description

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Size(inches).Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafeutdownsystemsEnclosure ofintervening combustibles forApndixRDiscussed inAppendixRexemption requestOtherreason,described below.Note:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 02Page~Zof~BBarrierNo.~34~~FireRating1H0EnclosedracewayConduit(C)/Tray(T)

Size(inches)~A/Barrierlength(ft)Description Area(sq.ft)l~EA)CC.OS@

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Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafeutdownsystemsEnclosure ofintervening combustibles forAendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

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AEP:NRC:0692CV Attachment 42Page82of~~BarrierNo.I9AEnclosedracewayS-79Q-ZFireRatingIConduit{C)/Tzay(T)

Size{inches)Barrierlength(ft)Area(sg.ft)Description Co4bgr7Pdcs/APE5o'sc=DPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.Enclosedraceway87PCR"2.FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)aOArea(sg.ft)Description C'ounir7z~wdwPmPurposeXPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 02PageP9of~BarrierNo.~~IICFireRating/A'C.Enclosedraceway0IBQ8-ZConduit{C)/Tray{T)

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Size(inches)Barrierlength(ft)Description Area(sq.ft)Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldMalkdowns 1I AEP:NRC:0692CV Attachment 42Page2'fof~BarrierNo.~~Enclosedraceway4ww~Conduit(C)/Tray(T)

Size(inches)Barrierlength(ft)S,~Area(sq.ft)IIDescription F44'/<2<<aeHOEACHoSuREsrtZPurposePhy'sical independence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixxemption request-Otherreason,described belowBarrierNo.IEnclosedracewayConduit(C)/Tray(T)

Size(inches)FireRating/HHBarrierlength(ft)Description Area(sq.ft)Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

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Size(inches)/2/WBarrierlength{ft)Description MD7<8Y5C'cMWNIocr44cYTM7DAIAAKC'tnCSedit.st=IoA3VCRadccRe5V'APurposeYPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption recpxestOtherreason,described belowBarrierNo.Enclosedracewayig~aConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)/PCOSa8573'~PL~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure of.intervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns 4~~'iAEP:NRC:0692CV Attachment 42Page2bofB~.~kA~~FireRatingl~4Enclosedracewayrt'2-PConduit(C)/Tray(T)

Size(inches)IZBarrierlength(ft)Description Area(sq.ft)Ei~rL=rn/PurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.FireRatingEnclosedracewayConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)A3Description aHIzen~cr<A;ScrSc-as'rD-0C.L-Lr5r~CPurposePhysicalindependence ofAppendixRsafeshutdownsystems~Enclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns IJ AEP:NRC:0692CV Attachment 02.Page~2.of~BarrierNo.l7~FireRatingllk~Enclosedraceway280'tR-ZConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Area(sq.ft)Description ConcuIIPREsHhl'BQ Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.FireRatingEnclodracewayConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Area(sq.ft)Description Purposephysicalindependence ofAppendixRsafeutdownsystemsEnclosure ofintervening combustibles forAendixRDiscussed in'Appendix Rexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns I~

AEP:NRC:0692CV Attachment 42Page28of~~~BarrierNo./~4EnclosedracewayP-FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)7+Description Cow&QIcArea(sq.ft)/MPewus~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.Enclosedraceway7BRQ.B9/EP4-2FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)A'4Area(sq.ft)Description wh/C'CQSccLO54RRso~o0a.SeZvIoUPCoW/7Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC:0692CV Attachment 0P-Page29of~BarrierNo.~~EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)uLBarrierlength(ft)AfhArea(sq.ft)Description Z4<<~En/Ccosud~

usr<5~srPurposeXPhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo./8~EnclosedracewayFireRating///WConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description 4+2-Cs8-7AWYEPrlCArea(sq.ft)Pu&SSr2)~gSrbEmls&Qo~-APNEA5Co4ke-LdAZLiBANAASPurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns CJc~1 AEP:NRC-0692CV Attachment 42Page~Oof~BarrierNo.~~FireRating/EnclosedracewayA-C'onduit(C)/Tray(T) jSize(inches)/EIZBarrierlength(ft)Area(sq.ft)Description K~wv2+emnuess<y~RAY5VtCL~A351COOl.izTASinStoaLc)I'TttopBJC)b-(9O'o~PBP~7eAY'+X-~2fRcth)5too&APRR~AYS-~VECf&s-mi(w~z.houaa5.Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowarrierNo.FireRatingEnclodracewayConduit(C)/Tray(T)

Size(inches)~oBarrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsashutdownsystemsEnclosure ofintervening combustibles forendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

~~

I~II%~a0AEP:NRC:0692CV Attachment 02Page~of~BarrierNo.~~Enclosedraceway2Hz-CC3FireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description

%A-aA-R.L4oiA-Cai>>=8slD-8DPici~f6%sC5.-PurposePhysicalindependence ofAppendixRsafeshutdownsystems~Enclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowBarrierNo.EnclosedracewayFireRatingConduit(C)/Tray(T) ll+(cSize(inches)Barrierlength(ft)3&Description fledzArea(sq.ft)OX~(0PurposePhysicalindependence ofAppendixRsafeshutdownsystems~Enclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baaeduponfieldwalkdowns kg(~I AEP:NRC-0692CV Attachment.

42.PageS8of~BarrierNo.20~~EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)z/2Barrierlength(ft)/Area(sq.ft)//Description

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Size(inches)Barrierlength(ft)Description Area(sq.ft)2.Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

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Size(inches)Barrierlength(ft)2.Area(sq.ft)I2.Description

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Size(inches)Barrierlength(ft)Description Area(sq.ft)l2.0S~av-lK4)l~@J~-u~rv~sx>~8Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed "inAppendixRexemption recpxestOtherreason,described belowI'ote:Dimensions providedareestimates baseduponfieldwalkdowns

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AEP:NRC:0692CV.Attachment 42,PageB~of~BarrierNo.2.0G~~EnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft).75"(w.("(~>Description PMSOPPOPTE.DoaE+ouLL,fP-Ce'BoA=bEA3CLo7SZPAL=.LS.PurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowrrierNo.EncldracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRfeshutdownsystemsEnclosure ofintervening combustibles 2rAppendixRDiscussed inAppendixRexemption requesOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns 54~C e~,AEP:NRC-0692CVAttachment 42.PageBSof~.BarrierNo.2.oQ~~Enclosedraceway-C.52-IFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description

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/Tray(T)Size(inches)Barrierlength(ft)2Description MueArea(sq.ft)'TPO.uR;Lok)Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns

,<<,2)~~PAEP:NRC:0692CVAttachment 42Page~0of&~BarrierNo.2.1~~Fire"Rating'HPEnclosedracewayConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)S'~C.iO2JS.Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described below*************************************

BarrierNo.(8R,FireRatingEnclosedracewayConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)2.S'7~9~Purpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns AEP:NRC-0692CVAttachment f2Page~Bof98BarrierNo.W2.ClEnclosedracewayFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)N'A'rea(sq.ft)/ZDescription Z/vCAX'-c~/AX'-p/Eggyuk'uALLpurpose~Physicalindependence ofAppendixRsafeshutdownsystemsEnclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described below***+*+*****+****'k********************

BarrierNo.2.2.BFireRatingEnclosedracewayS-CConduit(C)/Tray{T)

Size{inches)~2./ZBarrierlength(ft)A'AArea(sq.ft)/Description A~cÃCZSuWC/AZ/'AcWMOONh)DdHWgW4AZZPurpose~Physicalindependence ofAppendixRsafeshutdownsystems~Enclosure ofintervening combustibles forAppendixRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baaeduponfieldwalkdowns

~AI AEP:NRC:0692CVAttachment 42-Page98'f~BazzierNo.FireRatingAAEnclosedracewayX2.Conduit(C)/Tray(T)

Size(inches)~ABarrierlength(ft)Area(sq.ft)35'75'Ã6'</7 Description HA'~4~~Ra~Rw+7Ara+W ZSr~S/nfQAvSAr&d&4&</5'.PurposePhysicalindependence ofAppendixRsafeshutdownsystemsEnclosuze ofintervening combustibles fozAppendixRDiscussed inAppendixRexemption request,~Otherreason,described below~$'oXZa/&c7-ro nrCE'f'CBarrierNEnclosedzacewFireRatingConduit(C)/Tray(T)

Size(inches)Barrierlength(ft)Description Area(sq.ft)PurposePhysicalindependence ofAppendixRsafeshuownsystemsEnclosuze ofintervening combustibles forAppen'xRDiscussed inAppendixRexemption requestOtherreason,described belowNote:Dimensions providedareestimates baseduponfieldwalkdowns E~~