ML17331A927

Provides Update to 930611 Initial Response to NRC Bulletin 93-002.Analysis Confirming That Subj Roughing Filters Will Remain Confined within Kidney Fans in Event of LOCA Inside Containment Encl

ML17331A927
Person / Time
Site:	Cook
Issue date:	08/06/1993
From:	FITZPATRICK E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	MURLEY NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:1188A, IEB-93-002, IEB-93-2, NUDOCS 9308110256
Download: ML17331A927 (46)

Text

ACCELERANT 0DOCUMENTDlSTRBU'r.'j.ox SX~"j.'j.'Xi REGULAINFORMATION DISTRIBUTIO YSTEM(RIDS)ACCESSION NBR:9308110256 DOC.DATE:

93/08/06NOTARIZED:

NODOCKET¹FACIL:50-315 DonaldC.CookNuclearPowerPlant,Unit1,IndianaM0500031550-316DonaldC.CookNuclearPowerPlant,Unit2,IndianaM05000316AUTH.NAMEAUTHORAFFILIATION FITZPATRICK,E.

IndianaMichiganPowerCo.(formerly Indiana6MichiganEleRECIP.NAME RECIPIENT AFFILIATION MURLEYDocumentControlBranch(Document ControlDesk)I

SUBJECT:

Providesupdateto930611initialresponsetoNRCBulletin93-002.Analysis confirming thatsubjroughingfilterswillremainconfinedwithinkidneyfansineventofLOCAinsidecontainment encl.DISTRIBUTION CODE:IE11DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:BulletinResponse(50DKT)NOTES:RECIPIENT IDCODE/NAME PD3-1PDINTERNAL:

AEOD/DOANRR/DRPW/OGCB NRR/DSSAN~II-2REGFI02GFILE01EXTERNAL:

NRCPDRCOPIESLTTRENCL1111111111111111RECIPIENT IDCODE/NAME DEAN,WNRR/DE/EMEB NRR/DRSS/PEPB NRR/DSSA/SRXB NRR/SCSBRES/DSIR/EIB NSICCOPIESLTTRENCL11111111111111DA,DiNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)

TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!DTOTALNUMBEROFCOPIESREQUIRED:

LTTR15ENCL15 InmanaMichiganPowerCompanyP.O.Box16631Coiumbus, OH43216Z'NDIANANICHI64NIaOMfERDonaldC.CookNuclearPlantUnits1and2DocketNos.50-315and50-316LicenseNos.DPR-58andDPR-74BULLETINNO.93-02'EBRIS PLUGGINGOFEMERGENCY CORECOOLINGSUCTIONSTRAINERS AEP:NRC:1188A

'.S.NuclearRegulatory Commission Attention:

DocumentControlDeskWashington, DC'0555August6,1993

DearDr.Murley:

ThepurposeofthisletteristoprovideanupdatetoourinitialresponsetoNRCBulletin93-02datedJune11,1993.Theinitialresponsenotedthatadditional timewasrequiredtoinvestigate thecapability ofventilation unitsinthecontainments ofCookNuclearPlanttocontainfibrousfiltersfollowing aLossofCoolantAccident(LOCA).Specifically, theContainment Auxiliary CleanupVentilation Units(kidneyfans)locatedinthebasementofthelowercompartment ofCookNuclearPlantcontainments neededtobeanalyzed.

Asstatedintheoriginalletter,theseweretheonlysourcesofthefibrousmaterialaddressed inthebulletinthatposedaconcernforblockingthecontainment recirculation sump.Ananalysishasbeencompleted thatconfirmsthatthesubjectroughingfilterswillremainconfinedwithinthekidneyfansintheeventofaLOCAinsidecontainment.

Asrequested byyourstaff,acopyoftheanalysisisincludedasanattachment tothisletter.Thisanalysisutilizedtheleakbeforebreakphilosophy, developed byWestinghouse aspartoftheresolution ofunresolved safetyissueUSI-A2.Leakbeforebreakisapplicable toCookNuclearPlantviaamendment no.76toUnit2andanNRCSERdatedNovember22,1985.loooaIAsindicated inouroriginalresponseletterreferenced above,thefiltersdiscussed

'havebeenfoundtobeunnecessary forthefunctionality oftheventilation units.CurrentplansaretoensuretheroughingfiltersareremovedfromUnit1duringthenextrefueling outagescheduled tobeginFebruary1994.IfUnit1isforcedintoanunplanned outageofsufficient durationpriortothisdate,everyeffortwillbemadetoensuretheremovaloftheroughingfilterssooner.Weverifiedbyinspection thattherewerenoroughingfiltersinUnit2duringtheforcedoutagewhichbeganAugust2,1993.9308ii0256 930806PDRADQCK050003i58PDR Dr.T.E.Murley-2-AEP:NRC:1188A Thisletterissubmitted pursuantto10CFR50.54(f)and,assuch,anoathstatement isattached.

Sincerely, r'~gpss)E.E.Fitzpatrick VicePresident ehAttachment CC:A.A.Blind-BridgmanJ.R.PadgettG.CharnoffNFEMSectionChiefJ.B.Martin-RegionIIINRCResidentInspector

-Bridgman COUNTYOFFRANKLINE.E.Fitzpatrick, beingdulysworn,deposesandsaysthatheistheVicePresident oflicenseeIndianaMichiganPowerCompany,thathehasreadtheforgoingresponsetoBulletin93-02:DebrisPluggingofEmergency CoreCoolingSuctionStrainers andknowsthecontentsthereof;andthatsaidcontentsaretruetothebestofhisknowledge andbelief.Subscribed andsworntobeforemethis~4dayof199~8OTARYUBLICplIh0)il'iLNOTSaiYF'UCUC.STQEOFOHIO ATTACHMENT TOAEP:NRC:1188A ANALYSISOFALOCAONTHEVENTILATION UNITS ATTACHMENT TOAEP:NR88APage1ANERlCANELECTRICPWKRDatoJuly29,1993sub)octEffeetofLossofCoolantAccident.

onVentilation UnitsHousingFibrousMaterials promT.J.CrawfordxoS.A.Hover~Responding toyourmemoofJune11,1993,wehaveanalyzedtheeffectsofaLOCAontheventilation units.Themaximumdifferential pressureacrosstheventilation unitswascalculated tobelessthan0.1psi.Thebreakoftheaccumulator linefeedingthecoldlegwasusedastheLOCA.Becauseofthe'Leak-before-break'riteria thedouble-ended cold-legbreakorcross-under legbreakwerenotconsidered astheLOCAscenario.

Directimpingement ordynamiceffectswerenotincludedsincetheaccumulator lineentersthecoldlegnearelevation 615andthenumber2steamgenerator anditsfoursupportcolumnsarebetweenthebreaklocationandtheventilation unit.Attachedforyourinformation andrecordretention isacopyofthecalculation.

Ifyouneedadditional information pleasedonothesitatetocontactmeat1284.cc:S.J.E.EDG.R.M.K.Brewer/J.B.Kingseed/S.A.HoverFitzpatrick BurrisJr.Guha/C.D.Olsen/FileN930601wattachment w/oIIw/oItw/oIfIntra-Syatom ATTACHMENT TOAEP:N188APage2May1980Jan1984,Rev1Dec1988,Rev2Calculation CoverSheetTechnical Assessment SectionJobNo.:N930601Title:Effect ofLossofCoolantAccidentonVentilation UnitsHousinFibrousMaterials orFiltersSystem:Emer encCoreCoolinPlant:D.C.CookFileNo.:Unit:162DesignBasis:~NA By:T.J.CrawfordReview:C.P.LinApproval:M.

K.GuhaDate:~726 93ethod:4~~C.<>48.4Date:7>3Date:~7~VJTableofContentsPacae1.Problem2.Conclusion 3Procedure

---

4.Assumption(s) 5.Content(s) a.Compartment Energyb.InitialCompartment Massesc.FlowRatesBetweenCompartments d.NewCompartment Massese.NewThermodynamic StateofSuperheated Compartments f.NewThermodynamic StateofSaturated Compartments g.HeatTransfertoContainment Wallsh.HeatTransferWithinContainment Walls1010126.Reference(s) 7.Attachment(s).

1315 ATTACHMENT TOAEP:N188APage3TECHNICAL ASSESSMENT CALCULATION VERIFICATION CHECKLIST Page0of'SQReviewer:

Q~Sectionlleneger:

J~tt-~+Date:Reviewofthecalculation shallincludeevaluation againstthefollowing questions:

YESNOBasisforDetermination 1.Wasanappropriate methodused?2.Aretheresultsreason-ablecomparedtotheinput?~rMfCJl<l-~SOS.3.Aretheresultsnumerically correct?4.Aretheequations usedcorrectandthereference documented?

5.Werethecorrectinputsusedandtheirsourcesdocumented?

cprP~56.Aretheassumptions reasonable andproperlydocumented (including appro-priatereferences andadequatejusti-fication)?

7.Isthecalculation acceptable?

P<sM><~~oVg-ATTACHMENT TOAEP:N1188AI~VPage4EFFECTOFL.O.C.A.ONVENTILATION UNITS1.PROBLEMInamemoofJunell,1993(Ref; 1),Mr.S.A.HoverofNuclearOperations requested Technical Assessment toanalyzetheeffectsoftheaccumulator legbreakLOCAblowdownforcesontheContainment, Auxiliary Cleanup(Ventilation)

Unitlocatedinthebasementoflowercontainment attheD.C.CookPlant.Thepurposeoftheanalysisistodetermine thedifferential pressurethatmaybeexertedontheventilation unitduringaLOCA,andwouldbeusedbyStructural Engineering todetermine theabilityofunitstocontainfibrousfiltermaterials.

ITheanalysiswouldbeinresponsetoNRCbulletin93-02andwouldbeusedtosupportcontinued operation untilthenextrefueling outage.

ATTACHMENT TOAEP:188A~<</5Q2.CONCLUSION Themaximumdifferential pressureacrossthecleanuporventilation unitswascalculated tobelessthan0.1psi.Thebreakoftheaccumulator linefeedingthecoldlegwasusedastheLOCA.Becauseofthe'Leak-before-break'riteria thedouble-ended cold-legbreakorcross-under leg-break werenotconsidered astheLOCAscenario.

Direct,impingement ordynamiceffectswerenotincludedsincetheaccumulator lineentersthecoldlegnearelevation 615andthenumber2steamgenerator anditsfoursupportcolumnsarebetweenthebreaklocationandtheventilation unit(Refs; 8&20).Theunitsitsonelevation 598andisabout10feethigh,bringingthetopoftheunittoelevation 608.Thepressureandtemperature werecalculated forthevariouscontainment compartments.

Theinitial'ressure, temperature, andrelativehumiditywere14.7psia,90.0F,and100%respectively.

Theinitialtemperature oftheicecondenser was27.0F.Thecomputerprogramwrittenforthisanalysis(LOCA01) wascheckedforreasonableness byusingittoanalyzethedouble-ended coldlegbreakwiththeappropriate initialpressureandtemperatures, andcomparing itwiththeWestinghouse TMDresultsandtheMPRAssociates resultsdisplayed onpIV-19ofRef.5.Theresultsaretabulated below.PeakSub-Compartment Pressure(psia)

LOCA01MPRTMDPeakDeckDifferential Pressure(psi)

LOCAOlMPRTMD29.026.023.98.48.38.6TheLOCA01programcalculates aslightlymoreconservative pressureanddifferential pressure.

Therelatively closeagreement ofLOCAOlwithTMDandMPRprovidesadditional confidence intheresultsofthepresentanalysisoftheventilation unit.

ATTACHMENT TOAEP:N1188A/'gopage63.PROCEDURE A.Obtainthedimensions oftheairfiltering unit(Ref.

2),thedistances betweentheunitandthecranewall,theunitandthebiological shield,theunitandtheceiling,andthetwoelevations.

Calculate flowareaforsteam/water mixturearoundtheairunit.B.Obtainthediameteroftheaccumulator lineandthemaximumblowdownflowratefromit(Fig.2-3,Ref.3).Usearealistic valueoftemperature forcoldlegwatertocalculate thedensityandqualityofthesteam-water mixturethatwouldbereleased.

C.Obtainnecessary.

inputdata.MuchofthiswastakenfromRefs.4,5,6,7,8.Thisincludedthedimensions ofthecontainment

building, sub-compartment volumes,flowareasbetweencompartments, wallsurfaceareasandthicknesses, andmassandareaofmetalinthecompartments.

D.Dividethecontainment buildingintotwelvesub-compartments orregions.Thelowercompartment wasdividedintosixregions.Thetwofan-accumulator rooms,thereactorcavity,andtheinstrument roomwerefourmoreregions.Theicecondenser andtheuppercompartment weretwomoreregions.E.Dividethecontainment wallsintoslabsornodesofincreasing thickness fromthesurfacetotheinterior.

F.Writeacomputerprogramtocalculate thethermodynamic statesandproperties ineachcompartment, andtheflowofairandsteamamongcompartments.

Thiswasdonebyincorporating someofthetechniques usedint:heMARCHprogram(Ref.

9).G.Makethenecessary calculations andtabulatetheresults.

ATTACHMENT TOAEP:N188A4.ASSUMPTIONS

~(~J~Page~77/7.qf>>A.Thecontainment buildingmaybeaccurately represented asalowercompartment dividedintosixregionsseparated byasteamgenerator orthefiltering unit,thedeadendedregionsandreactorcavity,theicecondenser andtheuppercompartment, foratotaloftwelveregions.B.Thepressureandtemperature wereuniformthroughout eachcompartment.

Theairandsteamorwatervaporformedahomogeneous mixture.C~Theflowrateofairandsteamamongcompartments couldbeadequately modelledusingaformofcompressible flowequation(p 3-5,Ref.10)withanappropriate flowcoefficient, flowareaopening,specificvolumes,andthepressuredifference betweenthecompartments.

Thisequationincludesanacceleration pressurelossaswellasformlosses.'Theflowcoefficients wereobtainedfromRefs.485.Theflow.coefficient forthepassageformedbythefiltering unitwascalculated usingRef.12,p335-335.

AswasdoneinRef.6,theflowcalculated foreachtimestepwaslimitedsomewhatbyarestriction factortoeliminate theexcessive changesincompartment massineachtimestep,andtheresulting largepressureoscillations thatwouldbeobservedwithoutit.Ref.6calculated thenumberofmolesofairandvaporthatmustbetransferred tobringthepressureoftwoadjacentcompartments toanequilibrium pressure.

Thenumberofmolestotransferwascalculated forthelargestflowpassageareaforacompartment; flowthroughsmallerareaswasthenbasedonflowthroughthislargestarea.Thepresentcalculation usedaverysmalltimestep(0.0001 sec)toutilizeasimplerestriction factor(/1.4),andavoidcalculating molestransferred andflowsbasedonlargeandsmallvolumesandflowareas.D.Flowofliquidorwaterbetweenadjacentcompartment floorswasalsocalculated usingaweirflowtypeequationwiththedifference inwaterdepth.ThismethodwasalsousedinRef.16.E.Theairwastreatedasanidealgas.Thevalueofconstantpressurespecificheatwasassumedconstantat0.240Btu/ibm/F.

Thevalueofconstantvolumespecificheatwasalsoassumedconstantandwascalculated usingCv=Cp-R/778.16.Theinternalenergyofairwasafunctionoftemperature only.F.Thesteam/water vaporwasalsotreatedasanidealgaswhencalculating thenumberofmolesinacompartment oritsaveragemolecular weight.Steamproperties weretakenfromRef.11.G.Thecontainment wallsweresemi-infinite slabs,andheattransferonlyoccurredperpendicular tothethickness.

Thewallswereinsulated ontheoutsidesurface.Theycouldabsorbheatfromtheair/vapor mixture,butcouldnotlooseheattotheoutside.

ATTACHMENT TOAEP:N188A/Page8~)'~/eaH.Thefloorbetweentheupperandlowercompartments wastreatedasawallinsulated atthecenterline."Eachroomcouldaccesshalfthewallthickness.

Thewallsseparating thelowercompartment fromthedead-ended regionwastreatedthesame.Thewallsbetweentheuppercompartment andtheicecondenser wereneglected.

J.Themetalequipment intheloweranduppercompartments wasalsomodelledasaslab,andheatflowandtemperature werecalculated similarly totheconcretewalls.K.Thetemperature ofcontainment airwasinitially 90F,thepressurewas14.7psia,andtherelativehumiditywas100%.L.Thetemperature ofthecontainment wallswasinitially 90F.M.Allicecondenser lowerplenuminletdoorsandoutletintermediate deckdoorswereassumedtobeopen.N.Theicecondenser basketsandiceweretreatedasawallwithheattransferbeingcalculated asin.itemF.Theheattransferred fromthesteam/air mixturetotheicewascalculated ateachtimestep.Thecorresponding amountoficemeltwasthencalculated.

O.Emissivity ofthegasmixturetothewallswas0.3P.Nocreditwasallowedforthecontainment spraysystem.OTHERINPUTS/DATA Thecompartment volumes,wallsurfaceareas,thicknesses, physicalproperties, etc.weretakenfromRefs6and7.Thewallsurfaceareaswerere-apportioned forthenewvolumesbasedontheamountofperimeter orarccoveredbythevolume(Ref.

8).Thesearelistedinthecomputeroutput.Thecontainment wallsaredescribed intheAttachments.

Onlyaportionofthefloorsurfaceareabetweentheuppercompartment andthelowercompartment wasconsidered.

Theinsidediameteroftheaccumulator linewas8.75inches(Ref.

19)andthemaximumblowdownflowratefromitwastakenas24400lb/sec/ft**2 (Fig.2-3,Ref.3).Thisvaluecorresponds tothemassfluxat2250psiaand540F,theconditions ofcold-legsaturated liquid.Itwaskeptconstantfortheentiretransient toassureaveryconservative flowrate.Forcomparing theLOCA01programagainsttheWestinghouse TMDresults(Ref.

4)andtheMPRAssociates results(Ref.

5),thecoldlegdiameterusedwas31inches,theblowdownflowrateusedwas9882.777, andthetemperature was534.6F.Thesevaluesgavethe103,600lb/hrand530btu/ibminputsrespectively ofpIV-2,Ref.5.

ATTACHMENT TOAEP:N188AP4g/<9/g~Thenumberoficebasketswas1944;'theirlengthwas48feet,;theirdiameterandpitchwere12and14inchesrespectively (Ref.18).Thesurfaceofthewallsandotherstructures withintheicecondenser compartment wereneglected.

Naturalconvection andcondensation heattransfercoefficients betweenthewallsandthesteam/air mixturewerecalculated usingtheequations ofpp6-13to6-16(Ref.

9)Radiation heattransferwasalsoincluded.

Wheresteam/air velocities werehighenoughforcedconvection heattransferwasincludedusingRef.13,p148forthewallsandpl76fortheicebaskets.Heattransferthroughtheslabwallswasmodelledbydividingeachwallintoadjacentlayersofvaryingthickness, usingpp6-15and6-16(Ref.9).'Theicecondenser wasinitially at27F,anditcontains2,370,000 lbsoficealsoat27F.Iceproperties werefromRef.14.

ATTACHMENT TOAEP:N1188A'/>uPage105.CONTENTSA.COMPARTMENT ENERGY..Thetotalinternalenergyofeachcompartment wascalculated usingtheFirstLawofThermodynamics foranopensystem.Thechangeinenergyequalsthemassflowofenthalpyinminusthemassflowofenthalpyoutminustheheattransferred tothewalls.Thenewinternalenergywascalculated insubroutine ENERGYusingU2=mi*hi-me*he-Q+UlEachflowrateinandoutwasaveragedovertwotimestepsusingmi=(mi(2)+mi(1))/20B.INITIALCOMPARTMENT MASSESTheinitialvolumeoftheicewascalculated usingRef.14with,theinitialicemass.Thevolumeofairandvaporintheicecondenser wasprovidedinRefs.6or7.Thetotalvolumeoftheicecondenser wascalculated byaddingthevolumesoficeandair.VTOT(1,7)

=W(1,5)*VICEwhereW(1,7)=IcemassVICE=specificvolumeoficeVTOT(3I7)VTOT(2g7)+VTOT(1I7)whereVTOT(3,7)

VTOT(2,7)

VTOT(1,7) 7totalicecondenser volumeairandvaporvolumeicevolumetheicecondenser compartment identification no.Theinitialwatervapormassineachcompartment, including theicecondenser, wascalculated usingthesteamtableswithinitialpressure, temperature, relativehumidity, andopenorvoidcompartment volume.W(2,NC)=VTOT(2,NC)

/VGT(T(NC))*(RH(NC)/IOO.)whereVTOT(2,NC)

=openvolumeVGT(T(NC)')

=specificvolumeofvaporattemperature T(NC)RH(NC)=relativehumidity ATTACHMENT TOAEP:N188A(P%Pagell7/~~/gsTheinitialairmassineachcompartment wascalculated usingtheidealgaslawwithpartialpressureofair,temperature, andopenvolume.W(4,NC)=P(2,NC)*144.*VTOT(2,NC)

/R/(T(NC)+460.)whereP(2,NC)=partialpressureofair=totalpressure-partialpressureofwatervaporR=idealgasconstantforairC.FLOWRATESBETWEENCOMPARTMENTS Theflowrateofgasorvaporbetweenadjacentcompartments wascalculated usingp3-5,Ref.10F()=((2.0*gc*144.*DP()*AREA()**2

)/(2.0*dv()+KLS()*v()))**1/2whereDP()AREA()KLS()v()dv()pressuredifference betweencompartments flowareaflowlosscoefficient averagespecificvolumeofmixturedifference betweenv()betweencompartments Theamountofairandvapormasstransferred ineachtimestepwascalculated usingDF()=F()*TS/DPDFSwhereTS=timestepDPDFS=aflowlimitingfactor(1.4) formultipleflowpathsthrougheachcompartment tohelpavoidpressureoscillations andwhichhelpedbenchmark theprogramagainsttheTMDandMPRresults.Theflowof'iquidwaterbetweenadjacentcompartments wascalculated usingaversionoftheweirflowequationofp479,Ref.15.F(l,NP,)=Cflw*rho*Width*(Z(NF(NP))

-Z(NT(NP))

)/12.whereCflwrhoWidthZ(NF,)Z(NT,)weirflowcoeff;takenlargetoaccommodate inertia.densityofwater.acharacteristic widthbetweenadjacentcompartments.

depthofwaterin'from'ompartment, largerthanZ(NT,)

ATTACHMENT TOAEP:N1188A'/'3q~dP~s~>>7/z(z~Theflowofenthalpypertimestepfromacompartment wascalculated usingDH(j,NP)=DF(j,NP)*H(j,NC)whereH(j,NC)=theenthalpyoffluidtypejincompartment NCDF(j,NP)=massflowpertimestepalongflowpathNPj=liquid,vapor,andairD.NEWCOMPARTMENT MASSES..Thenewmassesofliquid,vapor,andairwerecalculated usingtheamountsofmasstransferred averagedoverthelasttwotimestepsusing,W(j,NC)=W(j,NC)+(DF(j,in,1)+DF(j,in,2))/2.0)(DF(jioutg1)

+DF(jgoutg2)

)/2')whereDF()?inout1,2massflowpertimestepliquid,vapor,andairflowpathintothecompartment flowpathfromthecompartment

previous, presenttimestepForgasflowthe'flowfrom'ompartment wasalwaysatapressuregreaterthanthe'flowinto'ompartment.

Pressureineachcompartment wascheckedeachtimesteptoidentifyfromandtonumbers.For1'iquidflowthe'flowfrom'ompartment hadagreaterdepthofliquidthanthe'flowinto'ompartment.

ATTACHMENT TOAEP:N1188APIV/PgPage13~)~~/>>E.NEWTHERMODYNAMIC STATEOFSUPERHEATED COMPARTMENTS Thenewpressure, temperature, etc.,ofeachsuperheated compartment following theadditions orremovalsofmassandenergywascalculated bybalancing thetotalvolumewithcomponent(vapor andair)volumes,andbalancing totalenergywithcomponent, energy.Thisgavetwoequations(

volumeandenergy)andtwounknowns(

totalpressureandtemperature

).Thesystemwassolvedbyiteration withaNewton-Raphson technique fornon-linear equations, (pp37-39,Ref.17)Thetwoequations wereexpressed asthefollowing twofunctions, Gl(P2,T2)

=VTOT(3,NC)

-(Mg*Vg(P9,T2)

+Ma*Va(Pa,T2)

)/2.0G2(P2,T2)

=U(4,NC)-(Mg*Ug(Pg,T2)

+Ma*Ua(T2)

)whereVTOT(3,NC)

U(4,NC)P2,T2Pg,PaMg,Vg,UgMa,Va,Uacompartment totalvolumecompartment totalenergynewtotalpressureandtemperature partialpressureofvapor,airmass,specificvolume,andspecificenergyofvapormass,specificvolume,andspecificenergyofairAdditional properties suchasspecificenthalpy, xelativehumidity, etc.werethencalculated usingthenewP2andT2.F.NEWTHERMODYNAMIC STATEOFSATURATED COMPARTMENTS Thenewpressure, temperature, etc.,ofeachsaturated compartment following theadditions orremovalsofmassandenergywascalculated bybalancing thetotalenergywithcomponent energy.Thisgaveoneequation(

energy)andoneunknown(temperature

).Thesystemwassolvedbyiteration withthebisection technique.(

p18,Ref.17)Theenergybalanceequationwasexpressed asthefollowing

function,

=compartment totalenergy=newtemperature

=massofliquid,vapor,andair=internalenergyofliquid,vapor,airGl(T2)=U(4,NC)-(Mf(T2)*Uf(T2)

+Mg(T2)*U9(T2)

+Ma*Ua(T2)

)whereU(4,NC)T2Mf,Mg,MaUf,Ug,UaAdditional properties suchaspressure, specificenthalpy, relativehumidity, etc.werethen'calculated usingthenewT2andthesaturated properties.

ATTACHMENT TOAEP:N188AG-HEATTRANSFERTOCONTAINMENT WALLS(SLAB)

Heattransfertotheslabwallsbynaturalconvection andcondensation wascalculated basedonthemethodsofRef.9,pp6-13,6-15.Aradiation heattransfercoefficient andaforcedconvection coefficient werealsoincludedforthiscalculation.

Atotalheattransfercoefficient wascalculated bysummingtheindividual heatflows.qt=qc+qn+qr'qfht*(Tb-Tw)=hc*(Tsat-Tw)+hn*(Tb-Tw)+hr*(Tb-Tw)+hf*(Tb-Tw)Solvingforhtgives,ht=hc*(Tsat-Tw)/(Tb-Tw)+hn+hr+hfwhereqtqc,qn,qr,qf hthc,hn,hr,hf Tb,Tsat,Tw totalheatflux(Btu/hr/ft**2) heatfluxduetocondensation, naturalconvection, radiation, andforcedconvection.

totalheattransfercoefficient(Btu/hr/ft**2/F) heattransfercoefficients duetocondensation, naturalconvection, radiation, andforcedconvection.

bulkandsaturation temperatures ofgasmixtureandwallsurfacetemperature.

Condensation wasassumedtooccuronlyifthewalltemperature waslessthanthedewpointtemperature.

ATTACHMENT TOAEP:N1188AH.HEATTRANSFERWITHINCONTAINMENT WALLS(SLABS) g/t./v)+!zg~~Thewallsweredividedintoadjacentslabsornodesofincreasing thickness asperRef.9.Theheattransfercoefficient forconduction heattransferbetweenadjacentslabswascalculated usinght(n)=k/(x(n)-x(n-1))whereht(n)=totalheattransfercoefficient(Btu/hr/ft**2/F) nodenx(n)=locationorcoordinate ofnodenk:=thermalconductivity ofconcrete(Btu/hr/ft/F)

Theconduction heattransferenteringnodenfromnode(n-1)ontheleft)wascalculated using,qw(n')=ht(n)*(Tw(n-1)-Tw(n))Andtheconduction heattransferleavingnodentonode(n+1).ontheright)wascalculated using,qw(n+1)=ht(n+1)*(Tw(n)-Tw(n+1))Thetemperature changeofthefirstnodewascalculated usingaheatbalance:DTw(l)=(QWavg-qw(2))*TS/(rho*dx(l)*Cp)whereQWavgqw(2)TSrho,Cpdx(1)(qt(TS=1)+qt(TS=2))/2.0timeaveragedheatfluxenteringsurfaceofnodel.conduction heatfluxleavingnode1tonode2timestepsizedensityandheatcapacityofconcreteorsteel.thickness ofcontrolvolume,node1Thetemperature changesoftheothernodeswascalculated inasimilarmannerusing:DTw(n)=(qw(n)-qw(n+1))*TS/(rho*dx(n)*Cp)whereqw(n)=heatfluxleavingnoden-1andenteringnodenqw(n+1)IIIInIIIIn+1dx(n)=thickness ofcontrolvolume,noden ATTACHMENT TOAEP:N188A6.REFERENCES 76~))q1~MemoofMay27,1993,fromS.A.HovertoT.J.Crawford, titled'EffectofFibrousMaterialonRecirculation PumpScreen'.2~3.DrawingNo.107C-890301-H, fromAmericanAirFilterCo.,Inc.,Louisville, Ky.,1972.Larson,J.R.,SystemAnalysisHandbook, NUREG/CR-4041, EGG-2354, Revision1,November, 1985.4.5.6.UpdatedF.S.A.R.forD.C.CookPlant,Tables14.3.4-15, 14.3.4-16, andFigure14.3.4-18 MPRAssociates, Inc.,IceCondenser Containment Independent AnalysisProgramFinalReport,MPR-340,April,1972.Technical Assessment Sectioncalculation N-921001, Containment BuildingPressureandTemperature inEventofDHRFailureWhileinMid-LoopOperation, January,1993.7~8.9.Containment DataCollection

Notebook, D.C.CookNuclearPlantI.P.E.,preparedbyFauske6Associates, Inc.,January,1992.A.E.P.drawings12-3181-14, 1-5688-10, and1-5699-10.

NUREG/CR-3988, BMI-2115, MARCH2CodeDescription andUsersManual.10.Steam,ItsGeneration andUse.,40thed.,Babcock6WilcoxCompany,Barberton, Ohio,1992.A.S.M.E.SteamTables,Thermodynamic andTransport Properties ofSteam,2nded.,1967.12.13.Idelchik, I.E.,andFried,E.,FlowResistance:

ADesignGuideforEngineers.,

Hemisphere Publishing Co.,NewYork,1989.Holman,J.P.,HeatTransfer, 3rd.ed.McGraw-Hill BookCo.,NewYork,1972.14.Perry,R.H.,andChilton,C.H.,ChemicalEngineer's

Handbook, 5thed.,Table3-275.15.Streeter, V.L.,FluidMechanics, 5thed.,McGraw-Hill BookCo.,NewYork,1971.16.Technical Assessment Sectioncalculation N-920101, FireProtection WaterStorageTanksforUnit16Unit2atD.C.CookPlant,January,1992.

ATTACHMENT TOAEP:N188A17.Grove,W.E.,BriefNumerical Methods.,

Prentice-Hall, Inc,1966.18.Variouswrittencommunications betweenNuclearSafetySectionandTechnical Assessment(Attached).

19.Verbalcommunications betweenS.A.HoverofNuclearOperations andT.J.CrawfordofTechnical Assessment.

20.TubecoInc.,drawing1-51-31,isometric pipedrawing.

ATTACHMENT TOAEP:N188APage18J>pf~7.ATTACHMENTS A.SketchofContainment withCompartments andFlowPathsB.Descriptions ofCompartment VolumesandContainment WallsorSlabsC.FlowDiagramofComputerProgramLOCA01.D.SelectedReferences.

E.ProgramListingofLOCA01.F.Programoutputsfor;accumulator legbreak(d=8.75),

runtime=0.1112seccoldlegbreak(d=31.),

runtime=0.2752sec ATTACHMENT TOAEP:N188A"'"(w~Page19ljgoREACTORCOOLANTSYSTEMCOMPARTMENT AREA,NO.3DOORICECONDENSER

~):<c)~STEAMGENERATOR 2'ogr')~~Cl3AREA2DOOR~t/~~AvV1')e$,iCh~~~'VC'l3~aARE.NO.4D~~~~~H)0+~'v~r-~~)~(r%~~l-l\ui:C~i~rORr~~~,~(y)AREANO.IDOREACTORCOOLANTSYSTEMRUPTURE~k~s~l,5~..a..~.~~IrC~FLOV/'UCT UNDERNEATH REFUELLING CANAL~AREAjlNO.5DOOR>().~7zs'eJ+(z.2Y'vrlai3-.'/0<>~V<q=2yu~vVyP>5.X"Q~PLANTDESIGN-PLANVIE%VSECTIONOFREACTORCCO3ANTSYSTEM.iCOhiPARTi.fENT

~O.7)Qvryg ATTACHMENT TOAEP:N188A0fg)00lIP/g~f'age20~Jz.~gg~ee0,F1NCOMPARTMENT

/'(.6Ir'v1CCUPPERCOKPARTISTg561TK33(01CCQrIIS,QIIC.G.iQr1CCJg~o/p<8FiNCDllPMWKNT

~/O0g.-~

ATTACHMENT TOAEP'NRC'1188A Page21=9~~$SG)Rgb~..-vg27<$0i=7)ltu'0~i~M~7lq0=)~"7~/vh=)~'tIC30MSA=)o9oo'4/i""SG3QiC.)VSY9bP~Zgo3)ro>g=)Z41~>~7RD4IC4>7'r$3~wŽn)(JjA-))3Irti:i-rSGDUCTR5IC54=72.2,Z4'o,i0~)5c.REACTORCONTAINMENT SUBVOLUMES ANDF'LOWPATHS ATTACHMENT TOAEP:1188ACOMPARTMENT NUMBERSANDVOLUMES(Refs.

4a5)</ppPage22~~/~~No.Description BreakregioninLowerCompartment betweenRefueling CanalandSteamGenerator No.2(S/G2)VolumebetweenS/G2andVentilation Unit.Volume(ft**3)27250.19000.VolumebetweenVentilation UnitandS/G3VolumebetweenS/G3andS/G4VolumebetweenS/G4andS/G1VolumebetweenS/G1andRefueling Canal19000.90000.38000.22500.IceCondenser(void volume)UpperCompartment DeadEndedRegionHousingAccumulators 2and3126940.745896.27450.10DeadEndedRegionInstrument RoomDeadEndedRegionHousingAccumulators 1and417111.27450.12ReactorCavity19731.

ATTACHMENT TOAEP:N188APage23z/z~g>DESCRIPTION OFCONTAINMENT WALLSORHEATSINKSLABS(Refs.

45:5)No.Description SurfaceArea(ft**2)Thickness (ft)RemovesHeatFromCmpt1BetweenCmpts1a'nd92BetweenCmpts2and93BetweenCmpts3and9\4BetweenCmpts4and95BetweenCmpts4and106BetweenCmpts47BetweenCmpts7andllIand78BetweenCmpts5andll9BetweenCmpts6andll10BetweenCmpts9and111BetweenCmpts9and212BetweenCmpts9and313BetweenCmpts9and414BetweenCmpts10and515BetweenCmpts11and416BetweenCmptslland517BetweenCmpts11and618InteriorofCmpt119InteriorofCmpt220InteriorofCmpt321InteriorofCmpt422InteriorofCmpt523InteriorofCmpt624FloorofCmpt125FloorofCmpt21392.915.1006.1336.3165.1301.293148.1878.1288.1392.915.1006.1336.3165.1301.1878.1288.508.244.269.1549.501.447.539.259.3.0/23.0/23.0/23.0/23.0/23.0/2N/A3.0/23.0/23.0/2J3.0/23.0/23.0/23.0/23.0/23.0/23.0/22.252.252.252.252.252.255.005.0010 ATTACHMENT TOAEP:N188APage2426,FloorofCmpt327FloorofCmpt428FloorofCmpt529FloorofCmpt630BetweenCmpts1and831BetweenCmpts2and8285.1641.531.474.2511.1301.32BetweenCmpts333BetweenCmpts4Iand8and81327.7654.34BetweenCmpts5and82477.35BetweenCmpts6and82208.36BetweenCmpts8and12511.37BetweenCmpts8and21301.'t38BetweenCmpts8and31327.39BetweenCmpts8and4,7654.40BetweenCmpts8and52477.41BetweenCmpts8and62208.42BetweenCmpt8andOutside24567.43BetweenCmpt9andOutside4829.44BetweenCmpt10andOutside3288.45BetweenCmptllandOutside4640.5.005.005.00F002.875/22.875/22.875/22.875/22.875/22.875/22.875/22.875/22.875/22.875/22.875/22.875/23.53.53'3.51046MetalinCmpt147MetalinCmpt248MetalinCmpt349MetalinCmpt450MetalinCmpt551MetalinCmpt652MetalinCmpt89479~4556.5009.28889.9349.8334.38435.0.1340.1340.1340.1340.1340.1340.012 ATTACHMENT TOAEP:N188Ac/pPage257/re/~~DESCRIPTION OFFLOWPATHS/AREAS BETWEENCOMPARTMENTS(REFS.

4&5)No.Description FlowArea(ft**2)LossCoeff1FromCmpt1to22FromCmpt2to33FromCmpt3to94FromCmpt3to45From'Cmpt 6FromCmpt4to56to57FromCmpt,1to68FromCmpt2to99FromCmpt9to1010FromCmptllto10llFromCmpt5toll12FromCmpt4to1213FromCmpt1to714FromCmpt2to715FromCmpt3to716FromCmpt4to717FromCmpt5to718FromCmpt6to719FromCmpt7to8,20FromBreakLineto1635.01079.077.0585.0585.0635.072.077.010.010.0154.0144.0122.072.0'2.0487.0155.0155.02003.00.40.3000.1704.2000.3400.3400.3001.4504.2003.0003.0004.2001.5000.8900.8900.8900.8900.8900.8901.430N/A ATTACHMENT TOAEP:N1188AWallsandRelatedCompartments; file=LOCA01 AreasarefromHALFLP02&N.O.D.notebook'>(3"Page26Walls1:8betweenL.C.andD.E.ALC:=12280.iRC~~~~gq6(g$Arco:=32.1+21.1+23.2+30.8'+73.0+30.0+43.3+29.7/ciI/Q/11IArco=283.232.1A:=-'LCArco21.1A:=-'LCArco23'A:=-'LCArco30.8A:=-ALC4'rco43.3A:=-ALCArco73.0A:=-'LCArco29.7A:=-ALCArco30.0A:=-'LCArcoWall7isIceBasketsinProgramLOCAOIA9'.=293148.g((~-gWalls10:17betweenD.E.andL.C.j2:=10..17(j2-9)J>ltM=QI9Q~Q)1I))gWalls18:23areXnteriorofL.C.>I(.~=Iz.Arci:=43.9+21.1+23.2+133.8+43.3+38.6A18:=3517.43.9A:=-'1818'rci21.1A:=-~A18Arci23'A:=-'A18Arci133.8A21AISArci43.3A:=-A1822'rci38.6A:=-.'18Arci ATTACHMEMT TOAEP:N188AWalls24:29areFloorofL.C.A24:=3728.y~c.y~~>ri<-l)Cm=43.9A:=-.A2424Arci21.1A:=-.A24Arci3A:=-A2423-226'rci133.8ArciA:=-.A2443.328Arci38.6A:=-A24Arcil'I('.)m=/43.9A:=-.A30Arciz21.1A:=-A30ArciWalls30:35arebetweenL.C.andU.C.A30:=16246.+1139.323~2A:=-A30Arci133.8Arci43.3A:=-.'3034Arci38.6A:=-.'30ArciWalls36:41arebetweenU.C.andL.C.j3:=36..41(j3-6)l>c~=4<8Wall42isbetweenU.C.andOutsideA42'=24567.)'lc.m=8Walls43:45arebetweenD.E.andOutsideA43:=12757.(234.-126.8)Ared1((30.0+43.3+29.7)45ArcoA43/~73.0A:=-'4344Arcon:=43..45Sum:=7AnSum=12757 ATTACHMENT TOAEP:N188AWalls46:51areMetalinL.C./SoPage28A4:=65616.~/"h~p/c.~43.9A:=-.'A4646ArciZ-21.1A:=-.A46Arci3232A:=-.'A4648Arci133.849Arcin:=46..5143.3A:=-.A46ArciSSum:=AnA:=-..A4638.6ArciISum=65616Wall52isMetalinU.C.A52'.=38435.SummaryofWallAreasnl:=1..9n2:=10..17n3:=18..23n4:=24..29nl1391.907914.9291005.9891335.5373165.3951300.8471877.5561287.839293148)3J'I7n21391.907)O)3Ig)5)I))914.9291005.9891335.5371300.8471877.5561287.8393165.395A508.05244.188268.4911548.452501.106446'13)&KQ5)z3n4538.53258.838284.5991641.35531.169473.514z.YxlE7z'Pn5:=30..35n6:=36..41n7:=42..45n8:=46..52n5303)7L333bg3g2511.3571207.0531327.1877654.2052477.0342208.164n62511.3571207.0531327.1877654.2052477.0342208.1643L7775359'0L//n7245674828.9213288.3514639.728lf+v/7n89478.5864555.7675009.18528889.177 9349.0388334.24738435bY7yV~5eX)

ATTACHMENT TOAEP:N1188ACOMPUTERPROGRAMLOCA01/9pPage29+/2r/~MAINF,L,LT,NREADTEND,LEDTCalcWR,.LWCALLINITLUHVALSI'NITLSMETALDO135NC=1,NCMPTCALLCLOSE1(NC) 135CALLCLOSE2CALLCLOSE31234CALLENERGYSATESTDO137NC=1,NCMPTIFLSPRHTTHENCALLTEMPl(NC)

ELSEIFNC=7THENCALLTEMP7(NC)

ELSECALLTEMP2(NC) 137CALLSLABCALLFLOWSIF()GOTO1234CALLWRIT1IF()CALLWRIT2IF()."PLOT1(M)IF()"PLOT2(M)DATASL,F,LT,NS,NIIIIIINITLF,LT,NCalcbreakflowareaCALLSOLID()CALLFCONVC1(HF())

CalcW(l:4,1:12),

P(1:3,1:12) andMOLES(),MWC()forallCMPTS1:12EstimateTRCSUHVALSF,NCalcv(),h(),u()forNCMPTSINITLSF,SL,NSCalcDX(),HT()SETTW(NS)=T(NC)

DTW(NS)=0.0 forallslabs.ENERGYF,LT,NCalcU(4,NC=l:12) mi*hi-me*he-Q(NC)+U(4,NC)forallCmptsSetQ(l:12)=0.0, willcalcinSLABIJSOLID()(Ti,vs,hs)Calcvs,hsoficeTEMP1(NC)

F,SL,L,LT,NCalcnewT,P,v,hforNCMPTifitissuperheated.

CALLCLOSE1(NC)

TEMP2(NC)

B,F,L,LT,NCalcnewT,P,v,hforNCMPTifitissaturated.

-CLOSE1forCLOSEEDITSTEMP7(NC)

B,F,LT,NCalcnewT,P,v,andWMELT(2)CalcW(l:3,7),

u()VTOT(),h,etc.,FT7=F(1:,NP,)

forcondensed vapor.CALLCLOSE1(NC)

ATTACHMENT TOAEP:N188ALOCA01..continued...

FLOWSB~PLI1~FISLgLTILINSetNF(N)=NCFT(N,1),

DFRX()=1.0, SetF(...,1)=

F(...,2),

DF(...,1)=DF(

,2)DH(...,l)=DH(...,2)

F(...,.2)=0.0, DF(...,2)=0.0, DH(,2)=0.CalcZ(NC),F(l,NP,.)

forliquidCalcF(4,NBK,.),

thenF(l:2,),DF(l:2,),DH(1:2,)forthebreakflowpath.CalcDP(),DV,,VBAR,F(4,NP,.)

allflowpathsCalcPLPS(),NSNL(),DN(),DFRX(),allpaths.CalcDF(1,NP,.)

&DH(1,NP,.)

CalcDF(4,NP,.)

basedonDF(4,1,.),

variousNPCalcF(2:3,NP,),

DF(2:3,NP,.),

&DH(2:3,NP,.)

CalcW(3:4,NC),

MOLES(),MWC()forallcompartments NC=1,12CLOSE3forCLOSEEDITSTVOL(NC)F,LTSLABAIBIFgSLILTINS~NSetQW(NS,1)=QW(,2)

QW(NS,2)=0.0 CalcASFR,TDEW,T CALLFCONVC(HF)

CalcHN,HC,HT,QWTW,Q(NC)forslabsNS=1,52CLOSE2forCLOSEEDITSMETALFISLgLTgNSCalcWMTL,DXMformetalequipslabsNS=46,52asDATAinINITLSWRITlAIBINSILTWriteT,P,U,H,W,F,DF,DH,QWgQgTW(ND=l,NS=1:52) forallCMPTSWRIT2A,LTWriteTW(ND=l:S,NS=1:52)

CalcemptT*usingVTOT(3,NC) andW(2:3,NC);

usedinSBRSSLAB&SATESTPLOT1(M)PLPlotsP(3,1:12)

&T(1:12)vsTimePLOT2(M)PLPlotsP(3,1:12) onfinerscaleSATESTF,L,LT,NCalcU(NC)abovesaturated; IsNCsaturated?

FCONVIFI.SLILTININSCalc'crossareaofeachemptforREno-ENTRYFCONVC(HF)CalcHF(1:52)foreachslab.

P0QrrrrATTACHMENT TOAEP:N1188ArrrPage7Yipesz~>6'P~~~lv'4>"~I9!1ere3>y.gs)~J).+/fp-p~zgVvf+~v(~hQQ'07lg>"vggSg(~~PryT59~-PPg~"/27-<@0~-(55m(S'")tC>o'~9lv)-)ZebraAT)v-('tv$0-7/,)(gyes9>))Jj-(33.1].)ql>7pvj)

ATTACHMENT TOAEP:N188A/Page327gtyf~:lBodiesofdifferent shapesinatube;three-dimensional low;Sm/F,<0.3[29,38)Diagram10-9~osSmlFo2r"o1.15cx',1--po/(1rSmlFo)DowodmRe'-@NameofabodyandschemeConvexhemispherewup (withoutsrdm~endphne)Sm---m4Dragcoefflcient c>>Re'=4X10',c>>=0.36;Re'=SX10',c>>=0.34;r~0.5forr,seeDiagram10-17fdmHemispher~one Sm=-m4WoFoZO'e'=1.35X10';cx=0.088;r~0.5Concavehemispherewup (withoutTomendplane)Sm=-m4Re'=4X10;c>>=1.44;Re'5X10',cx=1.42;r~1.54mdm'onekemisphere Sm=-m-4Wo,FopZO'e'=1.35 X10',c>>=0.16;r~0.5Circularsmoothcylinderinaflow~~dmparalleltotheaxisSm---m-4r/dm081234567cx1.00.910.850.850.870.900.950.99r~1.0Q(o)Ws!0ZO4.06'0t/der333 g~0~~~I~~~~~~~t~I.~~sI~9~~ItItIIItI'IIIIII'rleIItI'tI'IPi~5~t~~I~IIIIIIII-lmII~II'III'I~~.'~r~mamlaÃ855~~~~~~II~Fs~IIIIIIIlieIIII ATTACHMENT TOAEP:NI188APage34DISPLAYCOMPONENT DATACOMPONENT NO.:1-PP-45-2 COMPONENT TYPE:PUMP-CENTRIFUGAL SIZEANDUNITS:88500GALLONS/MINUTE PLANTSYSTEM:REACTORCOOLANTCABLESYSTEM:FUNCTIONAL NAME:REACTORCOOLANTPUMPg2UNIT:1BUILDING:

CONTAINMENT FLOORELEVATION:

598ROOM:LOWERCONTAINMENT, QUADRANTNO.2FEGFEGBOUNDARY:

10202jg12RCP(REACTORCOOLANTPUPAGE1OF21CONTAINMENT AZIMUTH:130CONTROLPANEL:1-RCPOTHERLOCATIONONSOUTHEAST SIDEOFSTEAMGENERATOR g2-OME-3-2 INFORMATION:

ENTERNEXTCOMPONENT NO.:PF3/15=DISPLAY NEXTCOMPONENT PF5/17=DISPLAY ASSEMBLYDATAPF9/21=SYSTEM MENUPRINTERID:PAGENO.:PF4/16=PRINT ALLDATA-WITHM&ENOS.:NPF6/18=DISPLAY M&EDATAPF8/20=PAGE FORWARDPF12/24=EXIT LUg4 ATTACHMENT TOAEP:N1188APage35FDBM043DISPLAYCOMPONENT DATAPAGE1OF9COMPONENT NO.:1-SI-170-L2 COMPONENT TYPE:VALVE-CHECKSIZEANDUNITS:10INCHPLANTSYSTEM:RESIDUALHEATREMOVALCABLESYSTEM:FUNCTIONAL NAME:ACCUMULATOR TANKOME-6-2OUTLET&ECCSTOREACTORCOOLANTLOOPg2COLDLEGCHECKVALVEUNIT:1BUILDING-CONTAINMENT FLOORELEVATION:

617CONTAINMENT AZIMUTH-140ROOM:LOWERCONTAINMENT, QUADRANTNO.2FEG:FEGBOUNDARY:

102.00RCS(REACTORCOOLANTSYSTEMCONTROLPANEL:OTHERLOCATIONINFORMATION:

BETWEENREACTORCOOLANTPUMPg1-PP-45-2 ANDTHESHIELDWALL,2FEETBELOWTHE617ELEVATION PLATFORMENTERNEXTCOMPONENT NO.:PF3/15=DISPLAY NEXTCOMPONENT PF5/17=DISPLAY ASSEMBLYDATAPF9/21=SYSTEM MENUPRINTERID:PAGENO.:PF4/16=PRINT ALLDATA-WITHM&ENOS.:NPF6/18=DISPLAY M&EDATAPF8/20=PAGE FORWARDPF12/24=EXIT LUP4 f14,Jll'VJla4441 jJVllia~Jilt@~skVV4'1ACUiCJLAT1.MCD 7/28/93jO$C4Vp.l*************************************************************

• CALCULATION CHECK**MaximumDifferential PressureacrosstheVentilation Unit**byC.P.Lin**************************************************************

A.InputInformation

ORIGIN:=1i:=1..2j:=1..31;Region1-regionbetweenrefueling canalandsteamgenerator No2,inwhichtheaccumulator linebreaks.Volume,V:=27250(ft3)1Flowpath(11)totheregionbetweensteamgenerator No2andventilation unit,Area,A:=635(ft2)l,lFlowpath(12)throughrefueling canal,Area,A:=72(ft2)1,2Flowpath(13)toicecondenser throughinletdoors,Area,A:=95(ft2)1,32.Region2-regionbetweemsteamgenerator No2andventilation unit,Volume,V:=19000(ft3)2Flowpath(21)totheregionbetweenventilation unitandsteamgenerator No3,Area,A:=1079(ft2)2,1Flowpath(22)toicecondenser throughinletdoors,Area,A:=64(ft2)2I2Flowpath(23)todeadendregionhousingaccumulators 2and3,Area,A:=77(ft2)2/33.LowerContainment Conditions Plc:=14.7(psia)Tlc:=90(F)Watervaporpartialpressure, PwAirpartialpressure, PaWatervapormasscontained inRegionPw.144~V1MwMw=i1545-~(Tlc+460)18Airmasscontained inRegion1and2,Pa-144~VRHlc:=100.0:=0.698:=Plc-Pw1and2,Pa=14.002t58-018140.4533(lb)Mai1545-(Tlc+460)28.97I1873.167I Ma=L1306.061]

(lb)

ATTACHMENT TOAEP:N188AB.FlowPathResistance 36y:=12.8--2:=1.0UsingCx:=0.702Sm1.FlowPaththroughSteamGenerator

fromIdel'Chik P.335,FO:=1203dm:=11.5lDO:=23.2DOPage37p2Sm:=dm.1Sm=414y=1.2.3333RES:=1.15-Cx-FOSm1-r-FO221--3DORES=0.95FO-SmK:=RES.1,1FOK=0.408l,l2.FlowPaththroughVentilation UnitfromIdel'Chik P.335,FO:=1203dm:=9.91:=13.8Sm:=dm1DO:=51.84DOdmy~y=20.9722UsingCx:=1.11z:=1.5Sm.3333Sm=136.62RES:=1.15.Cx.FOSm1FO221--3DORES=0.146FO-SmK:=RES-2,1FOK=0.1152,13.FlowPaththroughRefueling CanalEntrancelossandvelocityhead,K:=1+0.51,2Dh=7.299Cranewallthickness, FromIdel'Chik, P.144,10.411DhK:=K2,21,3K:=2.591,34.FlowPaththroughIceCondenser InletDoorsLowerinletdooropening,84"x91.5" Hydraulic

diameter, 4(8491.5)1Dh2(84+91.5)121:=3 ATTACHMENT TOAEP:N1188APage38p35.FlowPathtoDeadEndedHousingAccumulators 2a3FromFSARTable14.3.4-16, K:=4.22/3C.Assumptions 1.Pressures intheareasoutsideofregion1a2arethesame.2.FromTomscalculation resultsforregion1,airintheregion1and2isdepletedin0.3sec.4.Allthesteamgenerated intheregion1iscarriedoutthroughflowpaths.D.FlowCalculations 1.Region1Criticalflowratefromaccumulator linebreak,-D:=8.75(in)RCScoldlegconditions, Pres:=2250(psia)Tres:=541(F)hrcs:=536.07(Btu/lb)From"SystemAnalysisHandbook",

mf:=24400(lb/sec/ft 2)2nDMFR:=mf.-MFR=412Steamgeneration, hrcs-58.018Gs:=MFR1100.8-58.018Airdepletion rate,Ma1SaSa10.31Steam/air mixturedensity,Gs+Sa141.019.10(lb/sec)36.244F10(lb/sec)3Gs=4.671.10(lb/sec)MWSaGs11828.97Plc144MW=22.9771p=0.057(lb/ft3)1pa11545-~(Tlc+460)MH1****Assumeregion1&2pressure****Pl:=0.211(psiaboveoutsidepressure)

P2:=0.033(psiaboveoutsidepressure)

ATTACHMENT TOAEP:1188APage39P.4Pressuredifferential acrossflowpaths,DP:=P1-P21,1DP:=PlDP:=Pl1,21,3Steam/air flowthroughaflowpathcanbecalculated bythefollowing

equation, DP.p.144.2-32.2MFR:=A0l,jl,jKl,jFlowratioofpath(1,2)and(1,3)to(l,l),Al,jDPl,jKl,jFR1,FRl,j0.0640.065DPl,lA1,1Kl,lflowratethrouh3MFR=9.667.10l,lMFRSteam/air gpath(1,1),Gs+Sa1(lb/sec)Kl,jMFR.FRjPressuredifferential acrossflowpaths,2DP1,'Pl(j2A.pl,j12.32.21440.2110.2113Sa=9.8831022.Region2IncomingsteamflowfromRegion1,Gs3STi:=MFRSTi=4.137'0l,lGs+Sa1IncomingairflowfromRegion1,AIRi:=MFR-STi1,1Airdepletion rateinRegion2,Ma2Sa:=-+AIRi20.3(lb/sec)(lb/sec)(lb/sec)

ATTACHMENT TOAEP:N188APage40p.5Steam/air mixturedensity,STi+Sa2MW=24.5542MWDp.p1442.32.2MFR:=Aa2/j2/jK2/Flowratioofpath(2,2)&(2,3) to(2,1),2SaSTi21828.97Plc144pp=0.061(lb/ft3)215452-~(Tlc+460)MW2Steam/air flowthroughaflowpathcanbecalculated bythefollowing

equation, A2/FR2/jA2,1StK2,1K2/gtethrFR2/0.0120.012(2/1)/4MFR=1.369102,1MFR2,1earn/airflowraoughpathSTi+Sa2(lb/sec)jPressuredifferential acrossflowpaths,2K2/DP2/g2A~p2/g2MFRFR232.2144DP2/0.0330.033IDifferential pressureacrossventilation unitislessthan0.1psiI ATTACHMENT TOAEP:N188APage41AMERlCANKLECTRlCPOWKRDataJuly30,1993subjectCookNuclearPlantContainment

Building, EL.598'-93/8"HV-CFTVentilation UnitsFromC.E.Shute/.L.BallToJ.B.Eingseed/S.

A.HoverNEDShasperformed aGT-STRUDL finiteelementanalysisofthefilterhouseportionoftheHV-CFTventilation unitsasrequested byS.A.HoverinhisJune16,1993memo.Theanalysisfoundthatthefilterhousecanwithstand ajetimpingement pressureof0.25psibasedonthecapacityoftheflooranchorage andof1.13psibasedonthecapacityofthehousing.TheTechnical Assessment Sectionhasestablished thatthemaximumpressurethattheunitscanbeexpectedtoreceiveislessthan0.10psi.Therefore, theHEPAfiltershousedinsidetheboxwillnotbedislodged intheeventofaLOCAorsteamlinebreak.Theoriginaldesigncriteriaforthefilterhouserequiredthatitbeabletowithstand ajetimpingement pressureof2psi.TheabovefindingsbyNEDSshowpressures muchlessanditshouldbenotedthatNEDSdidnotuseaconservative approachintheiranalysis.

Duringthenextrefueling outages,awalkdownwillbeperformed byNEDStogatheradditional structural dataonthesefilterhouses.Recommendations willthenbemadeformodifications necessary tobringthesestructures uptotheiroriginaldesignrequirements.

ApprovedbyrcJcclANRccIa-Maner'clearDesign-Structural Er,Analytical CES/JAR:dmxc:J.A.Kobyra/R.

C.Armstrong Refstru'thv+ftms Intra4ystam