ML20133F023

Summary of 850724 Meeting W/Util,Cmf Assoc & S&W Re Depth & Extent of Preliminary Analysis Required to Support Interim Resolution of Hydrogen control-degraded Core for Facility

ML20133F023
Person / Time
Site:	River Bend
Issue date:	07/31/1985
From:	Stern S Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8508080105
Download: ML20133F023 (6)

Text

O KfCuq 8 kg UNITED STATES

[ NUCLEAR REGULATORY COMMISSION

7. 4: j WASHINGTON, D. C. 20555

%%****,/

JUL 31 GB5 Dccket I;o. 50-458 Applicant: Gulf States Utilities Company (GSU) ,

J Facility: River Benc Station (RBS)

Subject:

• Meeting Sumary - Hydrogen Control The participants met to discuss the depth and extent of the prelininary analysis required to support interin resolution of hyorogen control -

degraded core for River Bend Statior. (RSS).

The staf f and GSU differed over the validity of GSU use of the interr'ediate volume temperature profile, where few hydrogen burns occur, in determining the survivability of essential ecuipment. The staff's concern was that the current CLASIX-3 r.odeling is not capable of providing spatial dependent hydrogen burning. GSU's basic premise was that the final analysis including the quarter scale test was the appropriate vehicle for resolving nost issues raised by the staff.

All parties agreed the support of a September 9-11, 1955 ACRS teeting on t'his topic was a feasible goal provided:

1) GSU would reexamine their equipment survivability analyses to ascertain how many burns could specific equipment survive under " conservative" assumptions.

2) GSU would expand their equipnent survivability assessment to include cables and transmitters.

3) GSU would reexamine assumptions behind the drywell break case and report back to the staff.

4) GSU would specify which scenarios would be considered in their final j analysis.

1

5) GSU would supply Items 1 through 4 to the staff, on the docket, by August 5, 1985.

6) CSB (Kudrick) RSB (Rosenthal) and EQb (Garg) agreed that if the inputs specified above were receivec by August 5,- 1985, a staff report on GSU's preliminary analysis would be completeo by August 19, 1985.

l l

^

8500000105 850731 t PDR ADOCK O y4B

-. - +,

4 i

l

7) Mr. Rosenthal with concurrence by Mr. Notafrancesco emphasized that the staff preliminary evaluation would identify the limitations of GSU analysis and the staff continued efforts to resolve the hydrogen issue.

All parties' agreed that G5U would limit their preliminary analysis to the inter-acciate containment volume and not incluce upper containment. GSU also agrced to provide the staff with a description of nodifications made to the CLASIX-2

] Code prior to the ACRS neeting. ,

i

/ 1  ;

,i ,

l UK. ,I H

{ St ph . Ster , k;ect flanager j Licensing Branch Nc. 2 Division of Licensing 4

I 1

I 1

]

1 4

1

)

/

e 4

i i

L

7/24/85 NRC & GSU Meeting en Hydrogen Control for River Benc Station Attendees Name Organization " Tele Stephen Stern NRC/NRR/DL/LB2 492-8349 Brian Sheron NRC/NRP/ESI/RS 492-7460 Allen Notafrancesco NRC/NRR/USI/CSB 492-9407 Jack Rosenthal NRC/NRR/DSI/RSB 492-9447 Eddie R. Grant GSU 654-3334 JdCk Kudrick NRC/DSI/CSB 492-9496 K. I. Parczewski NRC/DE/CHEB 492-E593 Farouk Eltcuila NRC/CSB/DSI 492-9482 Hukam Garg NRC/DE/EQB 492-E208 G. M. Fuls CMF Assoc. (904)246-3495 Ed Goodwin Stone & llebster Eng. Corp (609)482-3881 Erwin Zoch GSU (504)635-6094 J. E. Booker GSU (409)B39-2181 Marvin Ecrris GSU (504)635-6084

/

lir. killiam J. Cahill, Jr.

Gulf States Utilities Company ,

River Bend Nuclear Plant l

l 1

cc:  !

Troy B. Conner, Jr. , Esq. Ms. Linda B. Watkins/Mr. Steven Irving Correr ar.d 1.'etterhahn Attorney at Law 1747 Pennsylvania Avenue, hb 35b hapoleon Street Kashington, D.C. 20006- Baton Rouce, Louisiana 70802 i hr. killiam J. Reed, Jr. Nr. David 7aloudek Director - Nuclear Licensing Nuclear Energy Division Gulf States Utilities Company Louisiana Department of l'

P. O. Box 295.1 Er.vironraental Quality Beaumont, Texas 77704 P. O. Box 14690 Baton Rouge, Louisiana 70898 Richard M. Troy, Jr., Esq.

Assistant Attorney General in Charge Mr. J. David McNeill, III State of Louisiana Departtent of Justice William G. Davis, Esq.

234 Loyola Avenue Department of Justice hew Orleans, Louisiana 70112 Attorney General's Office

' 7434 Perkins Road i

Resident Inspector Baton Rouge, Louisiana 70E00 P. O. Box 1051

j. St. Francisville, Louisiana 70775 H. Anne Plettinger 3456 Villa Rose Drive i Gretchen R. Rothschild Baton Rouge, Louisiana 70E06 Louisianians for Safe Energy, Inc.

i 1659 Glenmore Avenue Baton Rouge, Louisiana 70775 James W. Pierce, Jr. , Esq.

P. O. Box 23571

Baton Rouge, Louisiana 70893 f

Regional Administrator, Region IV U.S. Nuclear Regulatory Connission Office of Executive. Director for Operations i 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 4

O 4

l I

~

. 3-

7) Mr. Rosenthal with concurrence by Mr. Notafrancesco emphasized that the staff preliminary evaluation would identify the linitations of GSU analysis and the staff continued efforts to resolve the hydrogen issue.

All parties agreed that GSU would limit their preliminary analysis to the inter- I mediate contaiorent volune and not include upper containment. GSU also agreed to provide the staff with a description of rmdifications made to the CLASIX-3 Code prior to the ACRS meeting.

Stephen Stern, Project flanager Licensing Branch No. 2 Division of Licensing Distribution Docket file NRC PDR Local PDR PRC System liSIC LBr2 Reading Dewey, OELD, SStern, UButler EHylton I

O l

9 e

LBt hL/Pil 0512Q' LB#2/DL/BC E

SSdWn KudrKk WButler 07/}0(/85 07f /85 07g/85 u

1 l

Jet .) 1 1955

7) lir. Rosenthal with concurrence by Mr. Notafrancesco craphasized that the staff preliniiliary evaluation would identify the linitations of GSU analysis ana the staff continued efforts to resolve the hydrogen issue.

All parties agreed that GSU Would limit their preliminary aralysis to the inter-nediate ccntainnent volune and not include upper containment. GSU also agiu.c te previde the steff with a descriptici, of racdifications nade to the CLASIX-S Code prior to the ACRS necting.

] Stepher. Stern, Project !!ariager Licensing Branch t;c. 2 Division of Licensing Distribution Docket file flRC PDR Local PDR PPC Sjstero 151C LBa2 Reading Dewey, OELD, SSterr, l'Eutler Eliyl ton l t

\ .

LBe L DSihj Lbr2/DL/BC

~

SSd r. /Pl1 Kudr$ck WButler 07/p/85 07/- /85 07g/85

_. __ _ -