NRC-95-4545, Forwards Tables Developed to Assist Ongoing Review of AP600 Passive Containment Cooling Sys Design Basis Analyses (Dba). Tables Outline PCS DBA Methodology & Have Been Revised to Reflect Items Discussed in Recent Meetings W/Nrc

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Forwards Tables Developed to Assist Ongoing Review of AP600 Passive Containment Cooling Sys Design Basis Analyses (Dba). Tables Outline PCS DBA Methodology & Have Been Revised to Reflect Items Discussed in Recent Meetings W/Nrc
ML20091Q846
Person / Time
Site: 05200003
Issue date: 08/31/1995
From: Mcintyre B
WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To: Quay T
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NTD-NRC-95-4545, NUDOCS 9509060132
Download: ML20091Q846 (27)
v • d • e


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. Westinghouse

- Energy Systems -

Box 353 Pittsburg'i Pennsylvania 15230-0355 Electric Corporation '

'NTD-NRC-95-4545 DCP/NRC0392

-Docket No.: STN-52-003

' August 31,' 1995

)

Document Control Desk

. U.S. Nuclear Regulatory Commission

.. Washington, D.C. 20555 '

TATTENTION:

MR. T. R. QUAY

SUBJECT:

AP600 PCS DESIGN BASIS ACCIDENT "ROADMAPS"

~

Dear Mr. Quay:

4 The attachment to this letter provides several tables which were developed to assist the ongoing review of the AP600 Passive Containment Cooling System design basis analyses. The tables outline the PCS.

DBA methodology and have been revised to reflect items discussed in recent meetings between Westinghouse and the Containment Systems and Severe Accident Branch. This document was prepared in response to an NRC staff request and is intended to assist the review currently underway E

by the Containment Systems and Severe Accident Branch.'

Please contact me on (412) 374-4334 if you have any questions concerning this transmittal.

J g y,p Brian A. McIntyre, anag Advanced Plant Safety and Licensing

/nja -

1 Attachment -

~ ec:.

D.' Jackson, NRC J. Kudrick, NRC E. Throm, NRC

~ N. J. Liparuto, Westinghouse (w/o enclosures / attachments)

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1 9509060132~950831 POR. ADOCK.05200003 A _ _ __.

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Talde 1: PIRT Application to Eealuation Model: Inside Containnuent - AE 4 amies 9

PINT Mi== Bar APeet B Q ee ljw eg %Admeten Resetts How thmentatery b Medute Tirit Roses Repart fluesmetted to NRC Report Cauclustnes with Rempact to Meetund m

Em M M

rhensamesa ameer wGOTInc L Wlunie A Mainewsyonent H

Gas consaamens in she All seses Complete E5ects of LST includes air med WGOTHIC has been Governung equenons in Bounded I

Congrenstrie Gesses govermng equenons analyzed with NTD-NRC-W260 aushicompnnent seem, H ^

talidmard wee me LST WGOTHIC are a wiid WGOTHIC Encbase I: GOTHIC compressible gasses suprewnestion of Technical Manual describes are conctly inchsded compressible, govermng equations in gowning aquenons

' ' GOTHIC

behavuw, pas Uur's Manuel desenbes Mamanna Technical how as invoke various Specifiauion presswe used gasses in conpunction wah 05. GOTHIC selative hurnidery.

Quah6casion Report provides large dambew of sens wich air. hyeogen, and helkste ffTD-NRC45-4462 EPRI Report RA 93-10, GOTHIC Design Rev' w.

w Final Report WCAP-14382 validenes WGOTHIC with separate effects,inergrai sents wish g

seeara med air. M "

B. Buoyancy It Buoyancy Rwces are LST suernet Cornplete I.menped nondeling Saene injection point WOOTHIC has been

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inchsded in om hunped 4.o. yarn wc4Pw26 seperuse ovennines elewion and di,eciion vJid sed wie me Lsr y.

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parasneserjunction fews efern ses noncondensiNes above effects sess were governing erra%

WCAP-14382,for Dwegraf operanns deck theretiy perinreied E'-"~

Soesuded W

arsrs vehseing heas removat LST has prousypical

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blesses. asses freen vessel when PCS Insoyancydriving forces See benesJbe $ne IFA is I and covered the range Disuribuerd paramireer of Froude munters for snodeling shows good LOCA ag=mem wie 550 mode LST enadel.

Modelag of buoyancy and ensamanent is acceptable Page I of 6 Deer Last Moshfied: Augus 29,1995 4.09 pen

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Table 1: PIRT Appscatine to Evaluation Model:Isside Costainement. AN phases PIET

  • ==h sur AF400 BCs or I*ne af Wumdmelse Remaks New Uuum1mimsy is nendute Pheummama C

Pheesseum hGoduis im this Eweinastma Medet lemmend Phounemme endler WCAFT1 TIC i

C Fhm Fieht Subility L

Mising wishin de LST NTDERC-95-4439, Blowdown is the same Uppse asullower HT10THIC umodel has been

" - = -

j er SerenAcanon

-upper sannacuum and Mixing as siendmed passes.

maions of validmeed with die LST i

agious and saising Effects on APM0 Passne Long-serm LOCA en -

supresemed in die t.ST h w e m'

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j.

between the gper and Comainment Coolog drnes by buo>ent lowerponiansof the Sysnem DBA phnne and LST covers somednt t

WGOTIDC Applicatums rangeIbr AP600.

Sm 6earsfor 6ae TEA l

Doceanent MSLB h weg anined ACRST4I*'

ese to high velocity jet Meeems March 29 30, Diseduced paremmeter -

1995 (so be docunerneed in modehng shows gend lener repon) agreement with 350 l

node LST model.

Modehng of buoyancy a

and enerammient is

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acceptable.

1 II Surface A. Liquid FHm Hees M

T1iermal conducevity Chun & Seben Corupleie The Chun and Seben fuerrvel and esternal AB wahdenen pertenend Nomsnma wavy-laminar and Ne3 geteeNuct E

Transfer ofliquid Elm for Glas Wiseensin NTENRC-94-4100, denn provides a basis liquid Shn effects are widi WOOrlGCinchedes turbulent Chun and Seben since usinence t

temperenne drop Condensation

  • Liquid Film for Atmthernud wpresenend in the LST the seen eSect of Ehn esed as across aba is seinli Tests Model Validmeiens*

anductiviry.

temperanse drop apprqmase part of opent l

WCAP-14382 52 resiennoce B. Lhysid Filun L

Cnndensation en die LST WCAP.I3307 Ineernal Almsaresemble Preamypical swfaces WOOL' HIC model has been Shellsimpen modeled wish Boemided t

- hes inchaded in die LST validmerd widi she LST WGOTHIC enceed l*

Sestwhey/ Coverage sneerior surface of Wisconsin I.K. :

since -

s Condensation "r

in du slope is in escens of l*,

Sepersee eNects Condmanais on Tests PieunceofNoncendensible Droplet fonnation insdied in Wisconsin is seemrund so die utWST Ges-ENect of Swface impeowes mass transfer C-_

Tesa Bemeen of decytet Orientation,'Ph.D Thesis, fonussion neglecsed Univ.W' ecesia,1992 n

t C. tJaynd Fihn M

Liquid nine energy LST Compleie Subcootms is Prosorypical surfaces WGOTHIC needel has been Temperarmepecete -

Negligble. Ahn is as Enthalpy Tramport conservarton equerion Wisconsin WCAP-14382 514,2.5 negEgble compared to included in die LST waladmied via the LST and ilmough the considered in or near sansseion l

Condemation show equenons forliquid energy transpersed so Separane effects Waconsinr solution eenperanse Tests 6te hquid licld snadied in Wesconsin Teses WCAP-14190 Condensation Teses li Cage 2 of 6 Deer Last Moshfied. August 29,1995 4 09 pen i

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Tatde I: PIRT Application to balmation Model:Inside Containnwnt - AE phases PIRT Ramittet er AP648 BCs er l'seof Va5detta Resuets How thacertataty is I

I#'

Ptweeuwse C

2 Phrasemens tiedets in tids Ewelmenten Medel Handhed Phreeserna anser HCOTHIC D. Free Convecace L

McAdnam Fim Pime LST WCAP-14I90 page 2-7 Comwnve heat aimler Prosorypicalineemals ETX7THIC sendet has been A cesseroeme toss qrg.74; gaunded 6, Hem Tram 6er Correlaten WCAP 14326 page 4-t is noe significant in Range of validation validated with the LST maars ebe conserwarse 6ess WCAP-14382 $8 comperhon so ums defined in % CAP-mroe&seven as used mansfer 14382 $9.2 E Forced Convecnon L

Lusuped - Not needeled I.ST WCAPl4190 page 2-7 Convecu=e hear Proeteypkalipeermals WOOTHIC atodet has bece Ferced Lamped - Bounded WCAP-t 4326 page 4-t onester is see Range of validation validaard with she LST me ecnon hear samfer not by neglecnns forced

  • Hese Transfer WCAP-t4382 $4 signincant in deftned in WCAP-connadered amecnos coinpamen so mes 14382 39.2 r

Domihanee.

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F. Radiation Heat L

Not anodeled I.ST WCAP 14too page 2-8 Tempe store Prosorvpicalinermals stX THICmodelingof Not miodeled Bounded Tramfer diffewnces withus and armperamwe ariving LST orgtected radiativeheat rs are smsII forces inodeled im LST transfer enough that radiative heat tramfer is low G. Free Comecuce H

Heat and IET WCAP-14190 page 2 8 Mass vamtier Proeotypkalinternsis -

LST imemal dann as a A cassermanor 6 ems afo.741 Someded 6.

Mass Transtnr sness sansfer analogy Wisconsin WCAP-14326 63.8. 3 9,4.3 conservatively Wsed and semperature &hing seperme effeu assers she acesseef consernerse bass based on McAdams Condemation WCAP-14382 54.3. 8.2 incan-0.983 forces neodeled in LST Wisconsin Condenumon cervedanon is used eat plaar heat sansfer Teus e-o 187 Range of validation Tesis correlatine defmed ia % CAP-

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t4382 $9.2

.=_x._a H. Forced Convecnon L

Luiseped - Not modeled LST WCAP-14190 page 2-8 Mass mansfer Proeotypicalimenals '

Lesaped-Validsed WCAP-Lenaped - Nos modeled Boeunded 6y

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=cgteoungfarred IPfareassa WCAP-14326 63.8 conservanvety ksed and Froude numbers 14382 58 Mau Transfer CM snean-0.968 anodeled as LST Domiinsat only during fest mawcesse Tens e4203 Range of validation seconds of LOC 4 annaient

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denned ia WCAP-

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14382 $9.2 namesens Page 3 of 6 Deer Last Modified-August 29,1995 409pm '

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ef M Valldestemof Modunug PleT maakhus ter APeetBChor U""' V'8hl'" ma-as saew C=mesary b

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lashh EvelmansaMadet Phemesmuum ester WGryTIIIC III. Solids A. B-D Trennem H

GUTHIC conductors CYT1t NNRC44-4260 Uneof Ucinds with I-D Inernal LST heat sints WCAP 14382 shows SRP g edetmes are an BW-Cen6setian Heat used to anodelinerrnal LSY with

" GOTHIC C cesubscer for ineernal are modeled osmg validation resuka with apprenclL Transfer heat sinksinclude a l@

knernal heat Ama!ysis Package. Verven heat sinks in GOTHIC conductors imernal heme ssks snodeled Conservaarvely bounded anducten solution seks 3.4e, WIuenes I-t I t "

conservative and wish Uchida inr with Uctada ameenal prtyenies are used

%lume t 96 <hscribes the annesent =M SRP condensernt for AP900ineernal i

1-D conchscten wiutina guidehnes coseduceurs used Surface ares and wohsene of WCAP-14382 petmdes imernal heat seks me vahdemon wd LST conservmewety i

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.~ .. ~. - l Table 1: PIRT Application is Evaluation Model: Imide Containneemt - All phases PfRT adh Amr Art 00 BCs er t'se af %Bemelma Resehn Ilow LNucerealmey in Madmee h 9mmes Report Submined to NRC Report C ' - etah Reyect to Method g g Ptremanema an@mr WCOT1 TIC - I e g B. Condecnon H Climes indude l@ Congermon Complete. Thel @ ccmesceon 1-D con &scrue ined se WCAP-14382 94.1 l-D candisceas equation io Bonsided conducnon sendet used so dwaretral WCAP-14382 $23 shoes snodelis correedy stodel heat ermanfer ainanins ulidence of she l-pen of the Clime for conducuos through solwices the goversag equation and " inne through the LST shelt, D conducean equenons in. - used ice best r -- ccetssament shett discretuaison kr 4-D WOOD 11C which neglects the Cliene suhromane sansfer ihrough the sheit conducnon addissonni heas reeuwal ENects of degradunca of by ansamihal minrymme eine prm are ausduction freen dry as includedin anserrial wet surfaces. propermes. Comervaarse asserial PROPEN 5 umL IJuang I D conduenon <=nserewh mesiwn - anensihat conducnne nom dry m eet sayes. C. Form and Friction 1. Inser<magurunent Standard IFCAN4382 f60 t/sr afssenandless Smyyed $re fFA-Reurics amseg betwees Desmed cfrees g tenses losses experunentally drsm6cs mediods used so coefcsesias shrumgh effomer eger and kmer segious of suming bened kna modad LST grunneis eundssed crafhcients ..- a. ~ -when eming is a benett barreese suizang when iris a peamiry g$ce EtrA) Page 6ef 6 Done t ast Mod fied: Aegent 29,1995 4S9 pm

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Table 1: PIRT Application to Evaluat PIRT Ranking for AP600 BCs or Module Test Bases Report Submitted to NRI Phenomena Containment Phenomena Models A. Multi-component H Gas constituents in the All tests Complete I I. Volume Compressible Gasses governing equations analyzed with NTD-NRC-94 4260 WGOTHIC : GOTHIC Technical Manual describe-governing equations : GOTHIC User's Manual describes how to invoke various gasses : GOTHIC Qualification Report provides large database of tests with air, hydrogen, and heliam NTD-NRC-95-4462 EPRI Report RA-93-10, GOTHIC Design Review, Final Report WCAP-14382 validates WGOTHIC with separate effects, integral tests with l steam and air,-and-helwm B. Buoyancy H Buoyancy forces are LST internal Complete included in the lumped boouyant WCAP-14326, Separate parameterjunction fows efects test governing equations '!uget ' ens WCAP-14382,for integral S::ge! a tests Med ter~ Pag) i of 6 I' I

ANSTEC APERTURE . CARD Also Available on Aperture Card Model: Inside Containment - All phases Applicability of LST Validation of Modeling Use of Validation Results How Uncertainty is Report Conclusions with Respect to Method in this Evaluation Model Handled Phenomena and/or WGOTHIC Effects of LST includes air and WGUTHIC has been Goveming equations in Bounded ! multicomponent steam, and be!!un-validated with the LST WGOTHIC are a valid l compressible gasses representation of tre correctly included compressible, 'in goveming equations multicomponent gas behavior Maximum Technical Specification pressure used in conjunction with 0% relative humidity. I

d. umped modeling Steam injection point WGOTHIC has been

": :n; 2nd cr2t!He&n E~

ty te A!9g-hvermixes elevation and direction validated with the LST ru!9; frem buey2ney

"! be pre >!ded !- honcondensibles above effects tests were dri e a > "' be studied 2pp!:r& : "fC? o c hperating deck thereby performed

- % "'Orn u!C Bounded keducing heat removal LST has prototypical

^pp!!rtic :"!C3 o prom vessel when PCS buoyancy driving forces See boxesfor line IMA. &s dominant and covered the range histributed parameter of Froude numbers for odeling shows good LOCA -greement with 550 hode LST model. pfodeling of buoyancy nd entrainment is ceptable. Date Last Modified: August 29,1995 4:09 pm r 1

>,w a,' Table 1: PIRT Application to Evalual PIRT Ranking for AP600 BCs or est ses Repon Submitted to p Phenomena Containment Phenomena Models C. Flow Field Stability L-Mixing within the LST NTD-NRC-95-4459, or Stratification containment upper Stratification and Mixing regions and mixing Effects on AP600 Passive between the upper and Containment Cooling lower portions of the System DBA containment WGOTHIC Applications Document ACRS T/H Subcommittee Meeting, March 29-30, 1995 (to be documented in letter report) II. Surface A. Liquid Film Heat M Thermal conductivity Chun & Seban Complete Transfer ofliquid film for film Wisconsin NTD-NRC-94-4100, temperature drop Condensation " Liquid Film Tests Model Validations" I WCAP-14382 {2 B. Liquid Film L Condensation on the LST WCAP-13307 Stability / Coverage interior surface of Wisconsin I.K. Huhtininemi, containment Condensation " Condensation in the Tests Presence of Noncondensib' Gas: Effect of Surface Orientation," Ph.D. Thesis' Univ. Wisconsin,1992 C. Liquid Film M Liquid film energy LST Complete Enthalpy Transport conservation equation Wisconsin WCAP-14382 92.4,2.5 Condensation show equations forliquid Tests film WCAP-14190

Page 2 of 6 -'

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ANSTEC APERTURE CARD Also Available on un Model: Inside Containment - All phases Applicability of LST Validation of blodeling Uw of Validation Results How Uncertainty is Report Conclusions with Respect to Afethod in this Evaluation 51odel Handled Phenomena and/or WGOTHIC Blowdown is the same Upper and lower WGOTHIC modelhas been "":ng end m2t!"c2 tion. Se~" '!rj te ~':n[ as standard plants. regions of containment validated with the LST rere!9n;; f cm buey2ncy 2nd break e!:e t '"! Se ce "" be:mdied pr~!d:d!- Long-term LOCA is represented in the LST d:!ven a driv;n by buoyant

- *e "!OMH!C-2pp!:c2!!cn: "!C ^ P plume and LST covers

^ pp!!c2:!^ : "'C ^ Bounded rang 2 for AP600. See boxesfor line IV.A MSLB is well mixed due to high velocity jet. Distriburd parameter modeling shows good agreement with 550 node LST model. Modeling of buoyancy and entr inment is acc:ptable. l The Chun and Seban Internal and external All validation performed Nominal wavy-laminar and Negligible effect data provides a basis liquid film effects are with WGOTHIC includes turbulent Chun and Seban since resistance for film thermal represented in the LST the small effect of film correlations used as across film is small conductivity. temperature drop appropriate part of total resistance Int:rnal films are stable Prototypical surfaces WGOTHIC model has been Shell slopes modeled with Bounded sinc 3 containment shell included in the LST validated with the LST WGOTHIC exceed 1* slope is in excess of 1*. Separate effects Condensate on containment Droplet formation studied in Wisconsin is returned to the IRWST improv s mass transfer Condensation Tests Benefits of droplet formation neglected Subcooling is Prototypical surfaces WGOTHIC model has been Temperature profile Negligible, film is at negligible compared to included in the LST validated via the LST and through film considered in or near saturation energy transported to Separate effects Wisconsin Condensation solution temperature liquid field studied in Wisconsin Testa Condensation Tests Date Last Modified: August 29,1995 4:09 pm c5Oct64 L 1

%~~ Table 1: PIRT Application to Evaluc PIRT Ranking for AP600 BCs or Module Test Bases Report Submitted to NR Phenomena Containment Phenomena Models D. Free Convection L McAdams Flat Plate LST WCAP-14190 page 2-7 Heat Transfer Correlation WCAP-14326 page 4-1 ": ed Cen"ec% WCAP-14382 {8 E. Forced Convection L lamped - Not modeled LST WCAPl4190 page 2-7 Heat Transfer D:~!buted a:! p!:te WCAP-14326 page 4-1 forced cen'ect!^, WCAP-14382 58

xed cc zection I

F. Radiation Heat L Not modeled LST WCAP-14190 page 2-8 Transfer G. Free Convection H Lu ped - Heat and LST WCAP-14190 page 2-8 Mass Transfer mass transfer analogy Wisconsin WCAP-14326 63.8,3.9, C based on McAdams Condensation WCAP-14382 {4.3,8.2 flat plate heat transfer Tests correlation Di~!buted "e2! 2nd-d e t:2n er2n2!egy-ut n; ee n':xed convec*:c-ce~eht!c-H. Forced Convection L bumped - Not modeled LST WCAP-14190 page 2-8 Mass Transfer D!stibut ' "e t 2nd Wisconsin WCAP-14326 $3.8 curft:2n er2n2!c;y Condensation d b 'ed en Oct phte Tests forced c^~ e:tien '- the- -,:-ed c^~ ecde' ee ehtie-Page 3 of 6

ANSTEC APERTURE CARD Also Availabis on in Model: Inside Containment - All phases Applicability of LST Validation of Modeling Use of Validation Results llow Uncertainty is Report Conclusions with Respect to Method in this Evaluation Model IIandled Phenomena and/or WGOTIIIC Convective heattransfer Prototypical intemals WGUTHIC model has been A conservative bias of0.741 Bounded by is not significant in Range of validation validated with the LST times the nominal conservative bias comparison to mass defmed in WCAP-correlation is used transfer 14382 $9.2 Convective heat Prototypical intemals WGOTHIC model has been Lun: ped - Forced bump *.1 - Bounded transfer is not Range of validation validated with the LST convection heat transfer not by neglecting forced significant in defined in WCAP-considered convection comparison to mass 14382 69.2 D!P-ibuted "c:r n2! h D "-ibu'ed - i transfer p!2:e co-e!2!!cn Bernded by rede URG*Mm*y T:mperature Prototypical intemals WGOTHIC modeling of Not modeled Bounded diff;rene:s within and temperature driving LST neglected radiative heat containment are small forces modeled in LST transfer enough that adiative heat transfer is low Mass transfer Prototypical intemals LST internal data as a A conservative bias of0.741 Bounded by conservitively biased and temperature driving separate effect times the nominal conservative bias mean-0.983 forces modeled in LST Wisconsin Condensation correlation is used o-0.187 Range of validation Tests defmed in WCAP-14382 69.2 l Mass transfer Prototypical intemals Lumped - Validated WCAP-Lumped - Not modeled Bounded by cons:rv-tively biased and Froude numbers 14382 58 Di~-!buted "" e d neglectingforced mean=0.968 modeled in LST Dominant only during first cen ec"c co-44atiop-convection a 0.203 Range of validation see of LOCA transient see."n;; fee 2nd fened-l defined in WCAP-A xd ""n2n en!y sow /ecden % #- l 14382 59.2 degamuesonh4 cene-:2:! ce %s 1 Date Last Modified: August 29,1995 4:09 pm C ~Cc(^)3J 3fF'- ,D ( f -----

~~ Table 1: PIRT Application to Evalua PIRT Ranking for AP600 BCs or 3g g,,, Test Bases Report Submitted to NR Phenomena Containment Phenomena Afodels III. Solids A.1-D Transient 11 GOTHIC conductors CVTR NTD-NRC-94-4260 Conduction Heat used to modelinternal LST with " GOTHIC Containment Transfer heat sinks include a 1-D internal heat Analysis Package, Versior conduction solution sinks 3.4e, Volumes 1-111," Volume I, $6 describes thi 1-D conduction solution used. WCAP-14382 provides validation with LST Page 4 of 6 { b~

ANSTEC APERTURE

CARD Also Available on Aperture Card 1

nn Mod:li Inside Containment --All phases i Applicability of LST Validation of Modeling F Ud Validation Results How Uncertainty is Method Report Conclusions with Respect to . In this Evaluation Model Handled i Phenomena and/or WGOTHIC Use of Uchida with I-D Internal LST heat sinks - WCAP-14382 shows SRP guidelines are an Bounded conductor for internal-are modeled using validation results with acceptable approach. heat sinks is GOTHIC conductors internal heat sinks modeled Conservatively bounded conservative and with Uchida for with Uchida material properties are used consistent with SRP condensation for AP600 internal guidelines. conductors. Surface area and volume of Internal heat sinks are conservatively underestimated. ) l f I i Date Last Modified: August 29,1995 4 09 pm 50PS6D 3Z# U 1

n-Table 1: PIRT Application to Evalua' PIRT. Ranking for -AP600 BCs or gg Test Bases Report Submitted to NR Phenomena -' Containment Phenomena Models IV. Inter-A. Convection L Goveming equations LST NTD-NRC-95-4459, Module for lumped parameter Stratification and Mixing; volumes connected Effects on AP600 Passive withjunctions and Containment Cooling node-to-node System DBA connections for WCAP-14382 $5.3 distributed parameter WGOTHIC Applications Document WCAP-14190 69 I J Page 5 cf 6 ? ~~

i i ANSTEC . APERTURE CARD Also Avstlable on [ Aperture Card i Modeh Inside Containment - All phases 1 Applicability of LST Validation of Modeling Use of Validation Results . How Uncertainty is Report Conclusions with Respect to Method in this Evaluation Model Handled Phenomena and/or WGOTHIC. Erscaling shows MSLB Applicable to above Mixing biased toward worst Restrict mixing between Bounded by biasing expected to be wcIl deck circulation and casefor each accident. upper and lower regions of mixing in mixed. Flow area heat and mass transfer A sensitivity using nominal containment when mixing is conservative restriction in evaluation correlation validation Jow area in the AP6CO will a benefit (LOCA second directionfor each modellimits steam LSThas been used to. be providedin the peak) accident access to below deck develop rationalefor Applications WCAPto during short MSLB bounding approach on quannfy conservative bias. j releases ' mixing. Lumped - Overmixing t penalins heatand mass transfer when PCS is j dominant (LOCA longterm) _ l Distributed - 375 node I LST !: suf& : My acc== ! has slight bias towards ov;rmixing - can bias mixing with flow areas LOCA blowdown 7 pressurites SG compartment suficiently to drivefow throughout lower compartments. Natural j circulation develops post-blowdown ( t I~ t f l I f I r Date Last Modified: August 29,1995 4:09 pm i i s Rsoc'060 D Z' i

- ~. 4 Table 1: PIRT Application to Evalua i PIRT Ranking for AP600 BCs or 3,g,g, Test Bases Report Submitted to N$ Phenomena Containment Phenomena Afodels 1 l B. Conduction -H Climes include I-D Comparison Complete. conduction model used to theoretical WCAP-14382 62.5 shows-for conduction through - solutions the governing equation ad containment shell discretization for 1-D conduction - I C. Form and Friction L Inter-compartment Standard WCAP-14382 f6.0 ] l Losses losses experimentally describes methods usedis: based loss modelLST coefficients I = ,i - Page 6 of 6 M

l} ANSTEC APERTURE CARD-Also Available on n Models Inside Containment - All phases. Aperture Card Applicability of LST - Validation of Modeling Use of Validation Results How Uncertainty is Report Conclusions with Respect to - Methos in this Evaluation Model Handled . Phenomena and/or WGOTHIC. The 1-D conduction 1 D conduction used to WCAP-14382 $4.1 1-D conduction equation is Bounded modelis correctly model heat transfer contains validation of the l-part of the Clime programmedinto through the LST shell, D conduction eqi:ations in subroutines used for heat . hich neglects the Clime subroutine transfer through the shell. WGOTHIC w additional heat removal Effects of degradation of by azimuthal inorganic zine pain:are conduction from dry to includedin material wet surfaces, properties. Conservative material properties used. Using 1-D conduct?on conservatively neglects azimuthal conduction from dry to wet stripes. Use ofstandardloss Simplifed See IVA. Restrict mlxing between Boundefects of coefelents through representation oflower upper andlower regions of mixing. grating is validated compartments containment when mixing is a benefit. Increase mixing when it is apenalry, (See IVA.) d 3 i Date Last Modified: August 29,1995 4:09 pm c$ c 060. 'O

Table 2: PIRT Application to Evaluation Model: Outside Containment - LOCA All Phases PIRT Ranking AP600 BCs or Test Bases Report Submitted to NRC Report Conclus PhW,e6.w.e6 for M Phenomena External Models Flow Path O Module Volume A. Multi-H Gas constituents All tests analyzed Complete Effects of rnulti component in the goveming with WGOTHIC NTD-NRC-94-4260 component con compressible equations : GOTHIC Technical Manual

  • gasses are cori describes the goveming equations included in gov gasses : GOTHIC User s Manual equations.

describes how to invoke various gasses : GOTHIC Oualification Report provides a large database of tests with air, hydrogen, and helium. NTD-NRC-954462 EPRI Report RA-93-10, GOTHIC Design Review, Final Report WCAP-14382 validates WGOTHlO with separate effects and integral tests with steam, air, and helium gases.

  • R:chbn -!! M m2'dr *e e~ rect tjp^grapW2! rrer.
  • Westinghouse will expedite revised documentation which addresses Peer Review results.

B. Buoyancy H Buoyancy forces LST without fan Complete The external as are included in the running WCAP-14382 97.2.2 identifies the relevant predictions pro lumped parameter . Hugot tests priority test LST with fan off to support comparisons tc - junction -Eded 2~4 external annulus modelling. ^2r--d'c eg-with LST-and a governing Obg "- tects equations

  • Siegel and Norris WCAP-f4326 f 3.f,3.3 unced9t!ct c:

20 0 -- ~' * = tests NTD-NRC-94-4083

DBA,

_ NRC PCS Meeting W: Externalsepar with buoyarwy flows are valid, Tc b Eru~C As part of the Applications Report. Deern ent the sensitivity to Kloss (uniform and nonuniform) and nominal delay Weak sensitive time walbe confirmed using the final (unt!xt,. nd o evaluation enodel. has bwn shn

e ANSTEC APERTURE CARD Date last modified: August 28,1995 Also Ava11abb en a r ar+tren (Srd Applicability of LST with Validatior, of Modelling Method Use of Validation Results in How Uncertainty n Respect to Phenomenon and/or WGOTHIC Evaluation Model is Handled mgj; 4 LST includes air, steam, and WCAP-14382 provides validation of Governing equations in WCaOTHIC '- d f d E -- ^ posible heliurn extemal annulus modelling are a valid representation of r rit; ly methods. compressible, multi-component gas behavior. Bounded hg Maximum Tech Spec value of environment temperature is used as the boundary condition in WGOTHIC models. plus All 7 baseline and 7 WGOTHIC has been validated with The extemal annulus is modelled Nominalloss confirmatory LST in the HWRF LST 214.1 with natural convection with pressure boundary conditions coefficient is e program were run with the fan drMng the annulus flows in WCAP-at the inlet and collet, such that the used. ment off. 14382 $5,6,7,8. irnposed AP is 5 equal 4e the external density head driving force. Weak sensitMty seisted one The LST priority test 214.1 (fan Thus, the initial annulus air flow is to bas coefficient. Aho off) has been used for conservatively established at a validation. slightly negative value (directed Conservative downward in the annulus). initial air flow bounds r effects The momentum equation is solved, postulated Iven balancing the buoyancy driving annulus flow d. head with the unrecoverable losses start-up concerns. through the annulus, to f(loss uniturm) h b Ih V"brd

.c/ e PIRT Ranking AP600 BCs or Test Bases Report Submitted to NRC Report Cor c Phenomenon for M Phenomena External Models Flow Path C. Flow field L External flow path . LST riser Complete Potential for stability or is a 1D hydraulic . Extemal flow ICD-NRC-954414 recirculation af. stratification model path AP test RAI 952.102 response: downcomerir . Eckert and WCAP-14190, Section 7.2 and 7.3 provide total air flow at ' Diaguila momentum and energy scaling for justification. operating condt

  • Siegel and Norris neglighle since

. Hugot WCAP-14382, $8 provides validation using 1 D minimalenen flow path for annulus, momentum in downcomer. Te b ' " ?#-% PW Prd rent"My ?e m~r(un':: mend Small sensitivit) nerun"-l 2~'

na! "^'r' F

large Kloss effe See block on line above for loss coefficient My rests. Cornplete Justification fh Fog in annulus NTD-NRC-94-4100 Enclosure 1 effect of fog in " Radiation Heat Transfor Through Fog in the since effect of d PCCS Air Gap" capture by fo; has a negligtile the annulus airj temperature : overestimates. transfer to tho Effect of wind-Uterature Complete Quantificatio induced NTD-NRC-94-4166 for recirculatiq recirculation and "AP600 Containment Plume investigation" and thermally q stratiNed atmosphere to : atmosphere is cooling rates - neglected bounding recirq fraction, and a-sensitivity show significant conta pressure effedj Effect of wind-Wind tunnel tests Complete. Oscillating flo induced turbulence NTD-NRC 954467 case site with 14 is neglected " Analysis cf AP600 Wind TunnelTesting for positive mean i PCS Heat Removal" coeffeient sligh increase heat rates from cot Less severe tej more positive q coefficiente s signreant inor heat removal. e i 9 mete

I a Applicabuity of LST wth Validation of Modelling Method Use of Validation Results in How Uncertainty Respect to Phenomenon and/or WGOTHIC Evaluation Model is Handled MA The downcomer Ibw area is large External flow path is modelled as Negligible effect to act as a reservoir within which 10 lumped paramotor o aflect SuccessfulmodelHng of the pressures can equakte, providing a Weak sensitsvty 600 extemalannulus with a 10 lbw relatively uniform inlet for the to exterral loss wb path shows abihty of fD model annulus. % d *O & p2 b coetticient shows pr: b to predict rieerphenomena, potiliable Since heat transfer and pressure is not tensitive to momentum in the downcoiner, ,eiamo io ihe,iser, is so. mama. ANSTEC post *,ed D inhebitors to the possibility of downcomer A D C D Tl[ra instabilities is insignificant. Flowis Ms 6 BT s w extemalibw. > fairfy primarily one4imensionalin nature; therefore, use of 10 flow path is h justriable. Also Avatiable on Since fury devolpped turbulent flow A p M TO D id develqpe in annulus before the battle heats sp, there is no potential for hot-baffle-induced flow instablity to impachpeeue start-tp of annulus air flow. glecting Database consistent with Effect of fog neglected in WGOTH10 Negligible effect on answers Negligible effect nulus AP600 expectations for models kntion extemalannulus conditions. AP600 Pfect on heat fle. potential LST was run in no wind (<5 External pressure boundary Assumption of no recirculation due Negligible effect f effluent mph) conditions condition is unadjusted for these to these effects has negligble sified effects impact on pressure prediction ect ntion sulting i no - rnent or wor t Not applicable External pressure boundary Assumption of no wind is t'aunding Bounded et condition is unadjusted for these for pressure prediction ed effects nov;l

iment, ins with d

ws in c5000M 3 , S

PIRT Ranking AP600 BCs or Test Bases Report Submitted to NRC Report Conclusi Phenomenon for M Phenomena External Models Flow Path IL tiodule Surfeos A. Liquid film M Thermal Chun and Seban Complete The Chun and F heat transfer conductivity of NTD-NRC-94-4100, Enclosure 2 data provides a j liquid film for film "Uquid Film Model Validation" film thermal con temperature drop. WCAP-14382 $2 The liquid filrn temperature dro 9 :Eng,, '-

'""6r

'_::n'"-' g:.:_3 g -- w g.m:9 g

_ um B. Liquid filen H

Shell water . Full scale, cold Complete. Tests with wate stability / coverage coverage fractions 1/8 sector tests surfaces tp to 4 and applied flow WCAP-12665, f3.1 showed that thd rate . Hot LST without delay, h measured NTD-NRC-94-4247 quenching a hq coverage " Method for Determining Film Flow Coverage cold water. Eva for the APG(d Passive Containment Cooling films do not bec = Westinghouse System" unstable, even I flat plate film dryout [ evaporation tests NTD-NRC-94-4286 "Supplementalinformation on AP600 PCS Water coverage

  • Vendor Film Flow Coverage Methodology," including and sidewalls at agelcontamination sensitivity to 3/4 and 1/2 of bounding SSAR function of tirne' information sesse coverages showing wellaway from any cliffs bound (F ure (

9 in performance. scale data and. data from LST. SSAR Rev. 4 Preliminary Markup 6.2.1.f.3 model has best} summarizes water coverage assumptions. with cold and N tests, and bouri NTD-NRC-94-4083 data. _/NRC PCS Meeting W Weak sensitivty to PCS flow rate, water Model adeqw,St coverage fraction, PCS time delay was conservatively a show n. for effects of ag using a vMs4 T:5: E: M she wetting angl '! d~ ep-" en :"c' ' zg 2nd newsurface. Q - nte." " increases the p< the surface and; ^- M~;--de ' :: - : b; en Metry increases wet:ir ua emp d.!: 9:;!2nned Surface contam be minimal bag inspection arwl 4 criteria. Sensits using afproxid and 1/2 ancL4 I bounding SSAf values show the AP600 pressur is relatively inst further reduc coverage belcw bounding minirt evaluation medd

Applicability of LST with Validation of Modelhng Method Use of Validation Results in How Uncertainty Respect to Phenomenon and/or WGOTHIC Evalu:= tion Model is Handled r, W t-3 h Internal and external liquid film AH validation performed with Nominal Chun and Seban Negligible effect []for effects are represented in the WGONO sicludes the small effect correlation is used, accounting for since resistance tivity. LST. of tdm temperature drop. wavy laminar and turbulent liquid across film is fams. smaB part of total i resistance. )small N Heated LST data has been Water coverage is an input The validated conservative water Bounded /. used to assess heat flux effect boundary condition to the coverage model is used to calculate jewet on coverage fraction. WGOTHIC code. A Top-to-bottom input boundary conditions for the stack" of climes is used to model PCS DBA Evaluation Model ) XJ wth Measured coverage fractions each of the wetted and dryportions Cfing on the LST were used as input of the extemalshell. Coverage Bounding minimum water coverage p boundary conditions in the fractions are used to determine the fractions are used j l > total WGOTHIC validation runs to maximum value of potentially wetted validate cooling rate prediction shell heat transfer surface area models with test data. input to the WGOTHlc c#mes a n=pg f% ) dome model. Coverage for the dome at f% O E lau%r ,og and,nid, eve,s a as,v,ned,o be APERTURE ased to 40% to bound fur scale cold test a fu. data. who,e,he m a e enou," CARD ated that film stabiktydoes notlimit l]

coverage, Also Ava!!atte on meted The wetted cross sectionalarea of Apertute Card test the balance of the wettedportion where fRm stability limMs coverago is obtahed from 26.f 7 hrs in Table 4 of NTD-NRC-944247, where

%nts 100% dome coverage values show lGy that film stability does not Smit eten ' dome coverage. The Table 4 50 values have not been adjusted to 3 account for the reduced evaporatio's blty of associated with the assumed 40% h coverage on the dome. Therefore, the coverage traction assumed in l _ the DBA bounds all times during the ints will PCS DBA aning Weak sensitivRy to the input water y S'4 coverage shows that minor I perturbations in this assumption do byetage not knpact pressure predictions. Y mponse hvo to lin kalues. O c3 cgqq_

.e f 9 PIRT Ranking AP600 BCs or Test Bases Report Subrnitted to NRC Report Conch Phenomenon for M Phenomena External Models Row Path SheB wetting time

  • Full scale, cold NTD-NRC-94-4083 Weak sensit&i

_NRC PCS Meeting flow rate, wate W delay 1/8 sector tests fraction, PCal MThe discussion in the boxes to the was showrt right will be provided in the applications report. C. Liquid film M Uquid film energy Large Scale Tests Complete inclusion of ca subcooling conservation WCAP-14382 $2.4,2.5 show equations for term in energh equation liquid film accounts for liq subcooling sffq dome heat fhn Free convecti D. Free L Mixed convection . Hugot tests Complete transfer ca convection heat correlation which

  • Eckert and WCAP-14190 transfer reduces to the Diaguila tests Quantifies AP600 fraction of heat removed by in the AP600i McAdams
  • Siegel and Norris convective heat transfer.
ru fer :

correlation, at high tests !26 28% Gr/Re #, with

  • Westinghouse NTD-NRC-95-4397 5:r:'er~'.

E characteristic LST - dry external Supporting information for the Use of Forced length in Gr heat transfer Convection in the AP600 PCS Annulus See 9-!ery number based on

~r ^- F e channel diameter WCAP-f 4326 separate effects tests validation The mixed ca correlation pn data with a cc mean bias of, p ~e
  • ~,

Applicability of LST with Validation of Modelling Method Use of Validation Results in How Uncertainty s Respect to Phenomenon and/or WGOTHIC Evaluation Model is Handled l i >PCS LST 219.1 has water onto hot input Boundary Condition delay tirie Since the outer surface temperature Bounded verag) surface and thermocouple produces a conservative result. does not increase skynificantlyis not-hot until after water reaches the delay temperatures show the surface readily rewets during the high Earlier water application does not containment sheIIsurface in real t flow portion of the non-adversely impact air flow initiation time, cold tests are acceptable to prototypical oscillating flow, because there is wodf be a net determine delay times. Delay time improvoment in due to evaporative to wet the external surface is Vidootapes of a shakedown cooling. conservatively bounded by using g yp y LST with a somewhat higher time to reach steady state coverage M5W s 0%# flow rate show water behavior The effect on annulus air fractions from the cold full scale i E applied to 240F surface. The temperature and vapor content of test. This conservative delay time observations showed that the water applied to the surface is thus neglects integratedheat } advancing film front sizzled as explicitly modeled in WGOTHIC 1D removal during about f 06 minutes it was boiled away, and readily annulus calculation. A sensitivity of actual water application during flowed down as wide strpes based on actual chronology with the period when steady state film Also Availa >!oon after the surface fell below the earlier wetting will be provided in coverage is develqping. w**a Aporturo i ?ctd leidentrost temperature. the Applications report. surf:ce!c p^r:Me M: net df 22; H ~~~' Time delay used bounds all postulated effects retiv) LST covers range of liquid film WCAP-14382, p. 8-6 discusses WGOTHIC uses an appropriate set Negligible effect uation subcooling expected for valids%n of LST heat flux of governing equations for liquid since mechanism f film AP600. distrbution predictions over the film. Subcooling accounts for a accounts for only 'on LST dome. small fraction (-5%) of the AP600 small fraction of heat removal. AP600 heat Although a majority of the LST removal. have higher fractions of energy removed by subcooling than AP600, the LST is valid for dowloping a bounding approach for AP600 vakdation ehhysics and phenomena since a scalable liquid film enthalpy transport model is used. 4 eat Once the outer shellheats tp Mixed convection correlation Mixed convection correlation

  • !^ # 'e:"c?

oglected to at least 2F above ambient, provides good agreement with reduces to forced convection at 'r. the AP600 annulus operates in annulus conditions in the LST. high low Gr/Re21, consistent with Bounded ma# forced convection. expectation for AP600 annulus conddions. ut LST ineWdes tests with and A conservative bias of 0.83 times without fan on, covering the annulus from mbcedf.oo the nominal correlation is used. Hmsfer convection through forced convection dominated regimes. >ction

ts the erv:tiv) c5DC'0!

L [

-p 4 4 PIRT Ranking AP600 BCs or Test Bases Report Submitted to NRC Report Conclui Phenomenon for M Phenomena External Models Flow Path E. Forced L Mixed convection . Hugot tests Complete Forced convec convection heat correlation which . Eckert and WCAP-14190 transfer domin transfer reduces to the Disguila tests Quantifies AP600 fraction of heat removed by AP600 niser. ei Colburn correlation . Siegel and Norris convective heat transfer.

tr9 S:"

2 'rM tarfre at low Gr/Re.7 tests . Westinghouse WCAP-14326, $3.1, 3.2, 3.3, 3 A, 3.5, and 4.1 STC dry flat plate shows validation of the correlations with The mixed c:m tests separate effects tests correlation is b conservative d . Westinghouse LST - dry extemal mean over tie heat transfer a relatively lary t due to large m uncertainty writl W AS F. Radiation heat L Wall-to-wall . Westinghouse Complete Dry extemal vi transfer radiant heat STC dry flat plate WCAP-14382, $2.5 describes the radiant heat transfer is vafw transfer tests transfer model used in Climes . Dry LST G. Free Empirical . Gilliland and Complete h4e+w convection mass correlation for the Sherwood b Ere :: "r:" hem ?:rfer kansfee transfer Sherwood number, evaporation tests which is derived . Westinghouse NTD-NRC-954397 The annulus is by dimensional STC flat plate Supporting Information for the Use of Forced by forced cond analysis using the evaporation tests Convection in the AP600 PCS Annulus mass transfe outer she// hos Reynold's analogy . University of and Coburn) Wisconsin WCAP-14326 separate effects tests validation least 2Fabcf factors. condensation tests during the traj l H. Forced H Empirical . Gilliland and Complete. AP600 showa convection mass correlation for the Sherwood NTD-NRC-954397 in forced convi transfer Sherwood number, evaporation tests " Supporting Information for the Use of Forced dominant regh{ which is derived . Westinghouse Convection in the AP600 PCS Annulus" by dimensional STC flat plate Correlation b, analysis using the evaporation tests C--fr*c. conservative ( Reynold's analogy . University of WCAP-14326 gives correlation ($2.0,2.1), reasonable cg and Coburn j Wisconsin entrance effect used for separate effect test the range. i factors. condensation tests ($2.2), and correlation validation with tests p = 0 9?? ) Application of a ($3.6, 3.7).

= 0 *??

correction for mass transfer rate Once the oute gives the tp to at least ' AP600 forced ambient, the 4 convection mass annulus opera transfer correlation forced convg i WM

w-, Applicability of LST with Vardation of Modelling Method Use of Valdation Results in How Uncertainty Respect to Phenomenon and/or WGOTHIC Evaluation Model is Handled yat Dry LST has dominant ar.nulus WCAP 14382, $3.2.1,4.2 provide " M e!e~ M ^-(9 h M 2:cd U~ cd2My gn heat removal by convection summaries of the validation. Oc=creatF e W20) e ~' in (:c2"c-) h "!GOW!C, & cme

  • ~! ce pts 4w

= c!:med +f htal The LSTarxf separate effects Although the comparisons with data tests cover the range of AP600 show high scatter, it is attrbutable A conservative bias of 0.83 times ' unc~^&t;. Reynokfs numbers. to high instrument uncertainty with kne nominal correlation is used. fon small AT. The lack of any trend ir. Bounded 2.4% the mean over the range indicates Convective heat transfer is not a the the correlation is reasonable as a dominant signifwant-heat removal k Q pe, with basis for mass transfer analogy. mechanism for AP600 DBA.

atter Mass transfer validation, covering AP' :.RTURE g

n trement AT an order of magnitude higher, I kJ iall AT. shows much less scatter, 4, Nsc Avelistle on heat V:rying fractions of dry shell WCAP-14382 $7 shows selection of Conservative prcperty values are Bounded Ap arturo Card ti. surface aro included for all wet LST and $8 shows validation used in AP600 DBA. tests. The dry LST cases results. tr nsfer a large fraction of heat by radiation to the baffle. M Se^!::e cere::*:^- Seat See ! ce eer:=$c-h::t trent!= Scc!!cc cere=* % h:2t* crc!ce 51~;!T"'^ :"c" transies WCAP-14382 A conservative bias of 0.83 times Bounded pinated LSTincludes tests with and summarizes WGOTHIC separate the nominal correlatic n is used. M wkhout fan on, covering the effects validation results ($3.2.1, e the anr:ulus from mixed 4.4) p to at convection through forced bient convection dominated regimes. rt. perate LSTcerec 2 goc!^Ps00 WCAP 14382 Forced convection correlation, ' c' + d !r - ~'e in Gre e2r!: 9 29 ~; ter!c = " c"* summarizes WGOTHIC separate modified for mixed convection uneodainty t'c != cun9v3 effects validation results ($3.2.1, effects to allow transient startup, is 4.4) appropriate for AP600. U=cd2My 4 6.4% LSTincludes tests with and (x2"~) b wdhout fan on, covering the A conservative bias of 0.83 times En:cq~2t~' 2e over cnnulus from mixed the nominal correlation is used. n c!cmcd+f convection through forced ~^ unca'&r;. convection dominated regimes. ":&ne! ::::c'2ti^n (c:?h irhercn* cc=ce::th:c bb:) e-~' in Bounded WCAP-14382 ?!GOT9!C. ell heats LST'c! & *~* A " cyce c ibove

rge e!.^Psa^

9^^1! vip )0 Predictions of total evaporatim rn (p. B-3) and wall heat aux (p. C-6) validate models m ?. Integral soiting r l ~ l l

l PIRT Ranidng AP600 BCs or Test Bases Report Submitted to NRC Report Conclus Phenomenon for M Phenomena External Models Row Path a= Ill Module ScNs A.1 D transient H GOTHIC CVTR NTD-NRC-94-4200 Use of Uchid I conduction heat conductors used " GOTHIC Containment Analysis Package, sinks is consan transfer to rnodel a few Version 3.4e, Volumes 1-111," Volume 1, $6 consistent wi#h external concrete describes the ID corduction solution used. guidelines. heat rJnks, using the GOTHIC 1D WCAP-14382 provides vafdation with LST corduction solution IVs inter Nodk A. Convews M Governing LST without the External flow rate and AT comparisons For tests witto equations for fan operating between WGOTHIC and LST have been operating, extei lumped parameter validate ability to presented at several meetings. These will be rate and AT is i volumes calculate natural provided in a letter report. well. connected with convective flows junctions N7D-NRC-944083 Pressure resso Sensiti"ities to external Kloss, both uniform relatively inson and non-uniform, as well as sensitivity to air loss coefficioni inlet blockages up to 50% were provded at system is self-c the March 17,1994 NRC PCS meeting. The highly non relation of evar As part of the Applications report, these rate with surfac sensitivities will be confirmed with evaluated temperature re< using the final Evaluation Model. increased evap cooling with on moderata suita temperature uw B. Conduction H Climes include 10 Comparison to Complete. The 1D conduc conduction model theoretical WCAP-14382 $2.5 shows the governing is correctly pro < used for s 1,tions equation and discretization for ID conduction, into WGOTHIC conduction as well as model validation, through containmort shall ./ %

Applicabilit, of LST with Validation of Modelling Method Use of Validation Results in How Uncertainty 5 Respect to Phonomenon end/w WGOTHIC Evaluation Model is Handled host Not applicable GOTHIC Oualification Report shows Conservatively bounded material Bounded recnd validation for the GOTHIC 1D properties are used for AP600 P conductor, extemal conductors Surface area and volume of heat sinks are conservatively underestimated. ANSTE ] APERTU 1E CARD Also AvcIlab!c on Aperturo Car he f:n LST without the fan operating For tests without the fan operating A 1D lumped parameter model is Negligible effect flow ar a applicable for vhlidation of external flow rate and AT is used with an input nominalloss due to weak Seted .tural convective flows predicted well. coefficient in WGOTHIC analyses. sensitivity to external Kloss through the annulus with the 1D annulus flow model. Buoyancy driven flows are balanced >b by the form and friction losses. p to nce the ' cting. o par ition l 5 in tiv0 tses. 1 model 1D conduction used to model WCAP-14382, $4.1 contains 1D conduction equation is psrt of Conservatively rnmed heat transfer through the LST validation of the 1D conduction the Clime subroutines used for heat bounded material shell, which reglects the equations usod in Clime transfer through the shell. properties are used for AP600 additional heat removal by subroutirws. azimuthai conduction from dry Using 10 conduction conservatively containment shell. to wet surfaces. neglects azimuthal conduction from dry to wet stripes. Conservative material properties are used. Effoca of degradation seneskenet inorganic zine paint are included in j material properties. C C% L

-p h ese8* Rankin AP600 BCs or Test Bases Report Submitted to NRC Report Conclusi PIRT for M' g Phenomena Phenomenon External Models Flow Path C. Form and H External flow path Air flow path AP Cortplete Loss coefficient friction losses hydraulic test. -t/6 scale See tr Se 5'-+c en Mr : !f :~' a' a external flow oa resistance See also the Gne addressing item I.C.

  • Extemal flowpath is a 10 hydrauGc model.'

NTD-NRC-9H083 Senskivities to extemalIQoss, both uniform and non+nifonn, as wellas sensitivity to air hiet blockages sp to 50% were provided at to March 17,1994 NRC PCS meetity. 1; ~ ~.,

e..-_._...~. I ApplicabAity of LST with Validation of Modelling Method Use of Validation Results in - How Uncertainty Respect to Phenomenon and/or WGOTHic Evaluation Model is Handled LST - used constant loss coefficient Nominal loss coeffkierd used; lack Negligible effect for all predictions of sensitivity due to weak sensitivity to extemal Kloss ANSTEC APERTURE CARD Also Avaltable on Aperturo Card cs ce g 3 _ ;,_}}

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