ML17258A451

Responds to 810107 Request for Evaluation of Refueling Water Storage Tank Per SEP Topics III-6 & III-11, Seismic Design Considerations. Review of Other SEP Topics Could Influence Final Mod.Implementation Schedule Will Follow

ML17258A451
Person / Time
Site:	Ginna
Issue date:	01/14/1982
From:	Maier J ROCHESTER GAS & ELECTRIC CORP.
To:	Crutchfield D Office of Nuclear Reactor Regulation
References
TASK-03-02, TASK-03-04.A, TASK-03-06, TASK-03-11, TASK-3-11, TASK-3-2, TASK-3-4.A, TASK-3-6, TASK-RR NUDOCS 8201190146
Download: ML17258A451 (4)

Text

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JOHN E. MAILER Wce PresIOent T

N Ac@A oh' January 14, 1982 (

Director of Nuclear Reactor Regulation Attention:

Mr. Dennis M. Crutchfield, Chief Operating Reactors Branch No.

5 U.S. Nuclear Regulatory Commission Washington, D.C.

20555

Subject:

SEP Topics III-6 and III-ll, "Seismic Design Considerations" R.

E. Ginna Nuclear Power Plant Docket, No. 50-244

Dear Mr. Crutchfield:

We have evaluated the Refueling Water Storage Tank as required by your letter dated January 7,

1981 (open issue C5) and as addressed in our response dated March 23, 1981.

Our structural analysis, utilizing the very conservative assumptions of Regulatory Guide 1.60 for response spectrum and Regulatory Guide 1.61 for damping values, indicates overstresses in the tank wall, attach-ment bracket, and anchor bolts.

An earlier analysis of the

RWST, transmitted via a letter from Leon D. White, Jr. to Dennis L. Ziemann dated February 12,

1980, noted that the RWST design meets the intent of the original FSAR.

Nevertheless, modifi-cations will be made to the RWST design to upgrade into more current criteria.

Rochester Gas and Electric is not at this time able to make a commitment regarding the exact nature of the modification, nor the time schedule.

As part of the

SEP, the review of certain other topics could influence the final modification.

These topics include III-4.A, "Tornado Missiles" and III-2, "Wind and Tornado Loadings."

In keeping with the philosophy of the Systematic Evaluation

Program, RGRE will define modifications to the RWST, addressing seismic as well as other considerations of differences from current criteria, during the course of the Ginna Integrated Assessment.

Following the definition of the integrated modifications, a schedule for implementation will be proposed.

('OOIS9OIe DR gggcg 820iiy 0>00Op44 PDp Very truly yours, POTS le

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