ML19209B545

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Responds to 790424,0504 & 0620 Ltrs Reporting Results of Seismic Reanalysis of Reactor Coolant Piping Per IE Bulletin 79-07.Matter Resolved.Safety Evaluation Encl
ML19209B545
Person / Time
Site: Nine Mile Point, Cook  Constellation icon.png
Issue date: 06/22/1979
From: Schwencer A
Office of Nuclear Reactor Regulation
To: Dolan J
INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
Shared Package
ML18136A035 List:
References
NUDOCS 7910100089
Download: ML19209B545 (2)


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.C, UNITED STATES

! E, 4.- '7i NUCLEAR REGUi_ATORY COMMISSICN

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June 22,1979 Occket Nos. 50-315 and 50-316 Mr. Jchn E. Dolan, Vice President Indiana and Michigan Electric Company Indiana and Michigan Power Company Post Office Box 18 Bowling Green Station New York, New York 10004

Dear Mr. Dolan:

This letter is submitted in response to your latters dated April 24, May 4, and June 20, 1979 which provided documentation on the results of the seismic piping stress reanalysis for the D. C. Cook Pcwer Station, Unit Nos.1 and 2 in connection with IE Bulletin 79-07.

We have reviewed your reanalysis techniques and the results of the reanalysis and find them acceptable.

In subsequent discussicns,with Westinghouse on computer code verification, Westinghouse has agreed to solve a set of benchmark problems using WESTDYN and to provide the NRC a prcblem for confircatory analysis.

For computer code verification, we find this acceptable.

A copy of our evaluation addressing this matter is enclosed.

Si ncerely, p'&

a A. Schwencer, Chief Operating Reactors Branch =,l Division of 0;erating Reactors Enci sure:

Safe:

Evaluation Recor.

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age 79108 0 ii

s Mr. Jchn Dolan

r. diana and Michigan Electric Comcany
r. diana anc M.ichigan Pcwer Company June 22,1979 cc:

Mr. Rcbert W. Jurgensen Chief Nuclear Engineer American Electric Pcwer Service Corporation 2 Brcadway "ew Ycrk, New Ycrk 10004 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trewbridge 1800 M Street, N.W.

Washington, D. C.

20036 Citizens for a Better Envirer. ment 59 East Van Suren Street Chicage, Illinois 50605 Maude Res;cn Palenske Memorial Library 500 Market Street St. Jcsech, Michigan 49085 Mr. D. Shaller, Plant Manager Donald C. Cock Nuclear Plant P. O. Scx 458 Bridgman, Michigan 49106 Mr. R. Masse Donald C. Cock Nuclear Plant P. O. Box 458 Bridgman, Michigan 49106 300RORGlEL 113l 356