ML20024B523

Summary of 790426 Meeting W/Nrc Re Review of Analytical Methods & Results Which Support Ability to Predict Small LOCA Reactor Sys Responses

ML20024B523
Person / Time
Site:	Crane
Issue date:	04/26/1979
From:	Labelle D BABCOCK & WILCOX CO.
To:	Womack E BABCOCK & WILCOX CO.
References
TASK-07, TASK-7, TASK-GB GPU-0291, GPU-291, NUDOCS 8307090078
Download: ML20024B523 (4)

Text

r

, ~2-- - -k a

l G-

'l higq3

p.i b

,3q y,

[.'JEBASCOCK&WILCOXCOMPAtlY R. O. V 0 S E*JRJ E l4 POWER GE:; ERAT 10:1 GS.0UP

. i,q, sM i

M. ". SCSACA

.Ts

• l o M c-

.f, pg$ /*g C. D. MCRGA:

(

.h F.

NOEMM Y.

A.

/uCx. .:2:AcrR. Ptr.T DESIc':

Frwa i

ins.n.:

I o. ti tamtr. 't2NAcrR. TAITTT ANM.YSIS File No.

S i

Cust.

or Ref.

620-WA /T3. 93

)

rT 7 Date i

Sucj.

s-s t

s... ? -r-o est s t-m 177 FA Pt_nTS 9:00 A.M.

APRIL 26. 197 l v i........... -......

A MIETUC '"ITd NRC EAS ATTENDQ IN BE!~!.ISDA CN 4/26/79. THE FURPCSE OF THIS 1EETINC VAS TE REVIEV 0F' E&W MALY!ICAL 2fETECOS XO RESL1TS WHICH SUPPORT OTR A3ILI!T TO PRDICT S' TALL LOCA REkCTOR STSTDi RESPONSE TEE AREAS OF REVIE7 INCIrDD TEE IMI-2 UCIDDT PRDICTION MD SMALL PRD! ART SYSTCt BREAKS SUCH AS T/.AT DESCRI3D IN TEE C. 'CICELSON CORRESPONDUCI 40 IN RECDT SUE".ITTALS SUP?CRTINC OCONIE AGILIARY FEDWATER SYSTDt DESICN. TE PRE 1-CIPAL NEC RIPRESDhATITIS WERE R. MATISON, E. CASE. AND I. ROS::!LOCZT.

NRC VAS PP.D'.ARILY DiTERESTD IN Whr.act.R TEE EfI-2 UCIDDT EAD SEAYEN OCR CONFIDDiCE IN OUR SMALL ERIAK M0DILS NQ kt.:.w t TEE S&W TRANSIDT CrMPUTER CODES VT.RI CAPA3LE OF PEOFERLT PRIDICIC;G OTF-509'.AL OCCURRENCES OTER

~

TEAN TEOSE FRESL"!LT DESCRIED IN TEE SAR. IN MY OFD* ION, TEE L&W TEAM DID M EICELLDT JOB 07. C0:.TINCINC NRC THAT k"E STILL EAVE TEE PROPER TOOLS IN TdE CADDS, CRAFT AND TRAF CODES FOR CCMPLETE COVERACE OF TRANSIIhT STSTDi RESPONSE FOR ANT PEISD.7LT CONCEITD CTF-NCF2'.AL SCCARIOS. TEIS ETTORT WAS ENHANCED BT SENCE'.GI 0F CX:DS XO CF.ATT TOR TEE OtI-2 TRK;SIDT CONSEQUENCES AND D2 TECENICAL SOCONESS OF TEE MODELS AND RESL*LTS P107IDD FOR S.ALL BREAK LOCA E7ALUATIO'.:5.

~

NRC DC.TIFIED DIE FOLLO*.T*.1;C NEAR TE..'t IEQUESTS TOI ADDITIONAL 9

INFORMATICN:

1) SC;CIC' ARK OF CCOT CAPA3*LITY TO PKDICT SYSTDt RESPONSES

~

Qy 2

- - s i.

s.__...

.,va. _m

~

" " 8* 8" "

8307090078 790426 Claaffes $flapif0 CSR PDR ADOCK 05000289 tv p

HOL ff0

k

~ - -

..i.........,__

m

.1p MI?.O TO E. A. WOMAC/.

CO i

. NRC MIET*l:0 0:s C?I?.ATI:.0 l...

177 FA PU.';!S APRIL 26, 1979 9:00 A.M.

%'l PACE TJO i

i Venua.

i i

l S.ESULTC;C FRC:t ASTM:2T?.IC EFAT RIMOVAL CO';DITIONS El l

THE STErf CC;IRATORS AGAINST 0?IRATI2iG P'GT DATA.

1. .M SEQUC; TIE FILL OF STEMf GC; IRA!CRS FCLLO7C;C LOSS OF

~~

FIDk*ATER AT ONE OF TEE OPERATING PLA'.TS L'AS 2.ICCCCOD BY NEC.

(I EXPECT NRC k~ILL REQTEST Mu'T MORE ANALYSES OF TEIS AS*CO'.ITRIC :AICRE.)

2) PRESSI.'UZER REI.IEF VEVE 0? IRA 3ILITT COER STE.:y. RC Tk'0-PEASE LIQUID ELEASE. 53C VAS ?RD;CIPALLY Ihr:,ISTED Ei B&W'S OPERATC;G CPERIC;CE WITd TEE PORY n~D CCOE SAFETIES, EASIS FOR SINGLE FAIL'JRE ASSLYJTICKS, MO VALVE FIEJ CHARACTERISTICS. TdET l'AY REQTIRE n.ur. X ETALCATION OF BACK PRESSURE t. ::. CTS FROM TEE QUI 5CR TIG" 05 VEVE RELIEF FLO*J.

3) DEVELOPME'iT OF A MIK;S TO SC;CELGK COLIS FOR KATi;RAL CIR-

=.

CULATION PRD ICTION.

4) DEVELOP 2C;[ OF EMIRCE;CT 0?IRATING CRIMIA FOR TEE EA2CLDiG OF S*.ALL BRIAK LOCA LCNC TF.??. OPERAICR ACTIONS.

'.I EI?ECT l

NRC TO EXTCO TdI STTDY OF OPE 3ATOR ACTIONS INTO ALL B2ANCEES l

0F TEE LOF'J EVC'T "'REE A:O PERFA?S FOLLC'J 03 WITd ETINT TREE i

l RETIEW OF STEAM LI.NE SIFAK 2 0 STEAX CCEIRATCR TU3E RCPTURE.)

5) ANALYSIS OF WO7.ST CASE SMM:. SKE.G LCCA ASS".2tINO LOSS CF ALL FECWAS TO TdE ST. CCiEFATORS MQ SD;CLI FAILCRE VITHI.3 l

ONE EPI STREiC. THIS CCIRIS?O:OS TO TEE "S*.*RP/ SLURP" APPROACE

(

TO CORE C00LD;G.

~

50 ?ARTICCLAR CRCC;CT WAS ASSICND TO TdE S'JD".ITTAL CF TdIS WORK EXCEPT FOR ITDf 4.

IT AF?!.GS T:Ja! NRC WILL REQi;!KE ITD! 4 A2O OUR RESPONSE f

f

,..s c

i s..e..v..t-.r.

.i.. 0-

-.' ~

i

.{.

177 FA P'.*0;!S

.s r-.. n.

. 6. '. C. 'o 's 9 '. .A...

e

.u-s

0.,

ca.: c..

f I

I i

W.E; PF.C;0M72;A OCCL*?J.:2;G AT OU?, PLA:.'TS FJ.7I 50T s

I e

BIEN P.'CIOUSLY ??.IDICID ST C;1 C0;IS.

'.*I X"ST i

e.

i ALSO BE CC::CI?;;ID TiiAT CC;IS DIS!O:.73 FC? CC::-

l SIIVATIVE 200';3I';O 12;;* YSIS C;2; LIKI'.TS PRIDICT f

"3EST ISTD:ATI." CC:;3IIIC:;5.

D'.1/kn b

M.b d

• 9 f

O F

i

a

.g

.,,/'

'I~

..o..

_ c. r...

... ~..

I y.

o y

c.o;...

.C,. r r..r, s

.s

._a.

3.,....S

, 1 r.. r.

/JRI*. 25, 1979 9:7. A.M.

PACI TiCIII l

~~..n*.*.Y'u".w-~'.."_s*.I'".*S*.**.**...'.".".,*.*~t.'. '. E..

T O T*e* E..'.".2_" *w"". LI..?.".#. AS

""'.J.T. c.

a ACTIONS k..:. RIS?EC !3 C?EF. ATE;G 177 FA PLX.TS.

I Di CONSIOTEA!IC: OF THISE DISCCSSIC::S L'I!H NIC A'O FUTURE Di?AO:

a i

ON THE SAFITT E;EYSIS MEA, THE FOLLOWING LO::C TE?Ji ACTICNS SE",CLD BECO::I A PART CF 00?. ?!.UO.~n;0 L'!!H ?.I0ARDS TO %*ALYTICAL CA?ASILITY:

1 l

1) A T.;D LOOP CA',35 MODEL VITH I2CIPE:OE;T S!EM: CC;I3ATOR EEC DE'_UQ CAPASILITY AN3 ISDI?CCC;T LOOP NATU?.U. CIK-I l

C:"LATION CAPA3ILITY.

t BASIS - NRC IS QUITE CCNCI?2;ID k'ITH ASSTXIT?.IC EEAT RC?OTAL I

IN THE O!SG'S.

PESC;TLY, k"?. ARE RESTRICTED TO THE TRAP 2 MQ C?. AFT Co :ES FOR TWO LOOP ANA1.YSIS. TEE PRC?OSD CFJ5GES LZ.L3 FF.orIDE X"CE FASTER COMPUTE.R T!MI.S A53 M.LC7 US TO DO A 2CJCH E::RE FITC;SIVE m*DT 0F BOTR AST)2*ITRIC MO NATUF.U. CI?.CL*LATION CONDITICNS, ES?ICIALLY 17 A S:'.U.L LOC 5'IS NOT PRESC.T.

2) NON-IQ:ILI5K-'.7. PRISSURI";ER M': EL FOR TFJJ 2 MQ CRAFT.

EASIS - THIS C:-;GCE IS ALEA3! PLXO;ID FCR TEISE CC3ES, BUT IS REU*C DELATD BY crdIA 7.iI-2 ACIIVITT. AS A RE-SULT OF TEIS :'.EETING WITH :.*RC, tdt.Y AV. FLLLY AWARE TEAT tdt.SE CODES ARE CIFICIb;T U; TEEIR PRDICIICN OF INSUICE EFTECIS TECM ECS EI.A L*? ON PRESSURIIER PRESSCRI.

3) EI?r;SION OF C"1 PRCC7J2t TO 3C;C.".J.RK STST.?'T CODES k'ITH CPERA-TING PLANT DATA.

BASIS - NRC EAS SEC*.7i CONCT?5 TEAT 15'J ICES NOT HAVE BC;CE-MARF.S SUP?CRTC;C :'J5Y OF ITS CC::E CPTIO:;S AND CAPA3ILITY.

.TEUS, L'E ARE HICFJ.,Y VULNEF.*. ELE TO ISSCES S;CH AS T20$E RAISD IN !;iIS MEITI.0 AICUT N;ALY!ICAL CREDI3ILI!Y f

1 l

I