ML19269C804

Confirms 790123 Commitments Re Methodology to Be Used to Combine Loads That Occur When Multiple Safety Relief Valves Actuate:Design Will Accommodate Actuation of 19 Valves at Once,Ge Mark III Containment Design Will Be Used

ML19269C804
Person / Time
Site:	Black Fox
Issue date:	02/02/1979
From:	Ewing T PUBLIC SERVICE CO. OF OKLAHOMA
To:	Varga S Office of Nuclear Reactor Regulation
References
6212.125.3500.2, NUDOCS 7902120209
Download: ML19269C804 (3)

Text

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6212 DIN 8-014-355

]a7 PUBLIC SERVICE COMPANY OF OKLAHOMA

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A CENTRAL AND SOUTH WEST COMPANY k

x P O BOX 201/ TULSA. OKLAHOMA 74102 / (918) 583-3611 Q?

Public Service Company c f Oklahcma February 2, 1979 s

Black Fox Station File: 6212.125 3500.21L SRV Bubble Oscillation Loads Docket STN 50-556 and STN 50-557 Office of Nuclear Reactor Regulation Division of Project Management Light Water Reactors Branch No. 4 U. S. Nuclear Regulatory Commission Washington, D. C.

20555 Attn: Steven A. Varga, Chief Gentlemen:

During our meeting of January 23, 1979 with Dr. Roger Mattson, Director, Division of Systems Safety, Applicants agreed to provide a commitment related to the methodology to be used for combining the loads that vueur when multiple safety relief valves (SRV's) actuate, specifically loads from oscillating bubbles in the suppression pool. On the basis of that discussion and agreement Applicants commit to the following:

1) Containment structures will be designed to accommodate the loads associated with the simultaneous actuations of all 19 SRV's with all the bubbles assumed to oscillate n phase in the suppression pool.

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2) Design of the affected equipment and components will be done utilizing those techniques described in the G.E. Report 22A4365 " Interim Containment Loads Report - Mark III Containment" Revision 2 (ICLR Rev. 2) Appendix M and revised as a result of the regulatory staff's generte review, currencly underway and to be completed the first quarter of 1980. The ICLR Rev. 2 is contair.ed on the Black Fox Station docket as Appendix 3C to the PSAR, Amendment 14 dated February 2, 1979.

7902120 209 I> CENTRAL AND SOUTH WEST CYSTEM f

E""J7cn Wgnj Light gsyc ggge Company of OManoma gye e ge n},1 gytc Power pgst Tege 'punties Po th g

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Public Service Company of Oklahoma February 2, 1979 Black Fox Station File:

6212.125.3500.21L SRV Bubble Oscillation Loads Page 2 Docket STN 50-556 and STN 50-557

3) Affected equipment and components will not be permanently installed until the generic resolution of the staff review of ICLR Rev. 2 is available (during the first quarter 1980) for use in design.

In the event that the ultimate staff resolution is not forthcoming by April 1, 1980, Applicants will proceed with installation of affected equipment and components at their own risk taking into consideration interim st "' reports of methodology acceptability.

We believe that these commitments fairly refle:t the sense of our meeting.

Very truly yours,

[

um T. N. Ewing Manager, BFS Nuclear Project TNE:VLC:fd Attachment

BLACK FOX STATION SERVICE LIST XC:

L. Dow Davis, Esquire Joseph R. Farris, Esquire William D. Paton, Esquire John R. Woodard, III, Esquire Colleen Woodhear Esquire Green, Feldman, Hall & Woodard Counsel for NRC i:sff 816 Enterprise Building U. S. Nuclear Regt latory Commission Tulsa, Oklahoma 74103 Washington, D. C.

20555 Andrew T. Dalton, Esquire Mr. Cecil Thomas 1437 South Main Street, Suite 302 U. S. Nuclear Regulatory Commission Tulsa, Oklahoma 74119 Phillips Building 7920 Norfolk Avenue Mrs. Ilene H. Younghein Bethesda, Maryland 20014 3900 Cashior Place Oklahoma City, Oklahoma 73112 Mr. Jr.n A. Norris Environmental Projects Branch 3 Mr. Lawrence Burrell U.S. Nuclear Regulatory Commission Route 1 Box 197 Phillips Building Fairview, Oklahoma 73737 7920 Norfc,lk Avenue Bethesda, Maryland 20014 Mrs. Carrie Dickerson Citizens Action for Safe Energy Inc.

Mr. William G. Hubacek P. O. Box 924 U.S. Nuclear Regulatory Conmission Claremore, Oklahoma 74017 Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76012 Mr. Gerald F. Diddle General Manager Associated Electric Cooperative, Inc.

P. O. Cox 754 Sprintfield, Missouri 65801 Mr. Maynard Human General 'lanager Western Icrmers Electric Cooperative P. O. Box 429 Anadarko, Oklahoma 73005 Michael I. Miller, Esq.

Isham, Lincoln & Beale One 1st National Plaza Suite 4200 Chicago, Illinois 60603 Mr. Joseph Gallo Isham, Lincoln & Beale 105017th Street N.W.

Washington, D. C.

20036

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