ML20138M999

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Submits Addl Info Re Alternative Shutdown Capabililty for Computer & Control Room.Procedure C.13B to Change Pressurizer Level as Required by Analysis Will Be Revised by 860201
ML20138M999
Person / Time
Site: Rancho Seco
Issue date: 10/30/1985
From: Reinaldo Rodriguez
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To: Thompson H
Office of Nuclear Reactor Regulation
References
RJR-85-527, TAC-52291, NUDOCS 8511050004
Download: ML20138M999 (1)


Text

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h asuun SACRAMENTO MUNICIPAL UTILITY DISTRICT 'J 6201 S Street P.0, Box 15830 Sacramento CA 958521830.(916) 452 3211 AN ELECTRIC SYSTEM SERVING THE HEART OF CAUFORNIA RJR 85-527 October 30, 1985 DIRECTOR OF NUCLEAR REACTOR REGULATION ATTENTION: HUGH L THOMPSON JR DIRECTOR DIVISION OF LICENSING US NUCLEAR RFOULATORY COMMISSION WASHINGTCN DC 20555 DOCKET 50-312 RANCHO SECO NUCLEAR GENERATING STATION UNIT NO. 1 ADDITIONAL INFORMATION ON ALTERNATIVE SHUTDOWN CAPABILITY FOR COMPUTER AND CONTROL ROOM In a September 27, 1985 letter the District committed by November 1, 1985, to have a boric acid pump repair procedure in place or have an analysis that justifies the use of the present procedure without a boric acid pump repair procedure. The District's analysis shows that the required 1 percent delta k/k shutdown margfn can be maintained for Cycle 7 until the end of life by revising Procedure C.13B, "Cooldown from Hot Shutdown to Cold Shutdown with a Fire in the Contro Room" to require the pressurizer' level be increased to 225 inches when RCS temperature is below 4000F. This analysis further shows that this change is not required until 310 effective full power days into Cycle 7 and that a boric acid pump repair procedure is not required. By February 1, 1986, the District will revise Procedure C.13B to change pressurizer level as required by the analysis.

If you have any questions concerning this submittal, please contact Larry Young at Rancho Seco.

TJ V A R. J. ODRIGUE ASSISTANT GENE'P HANAGER, NUCLEAR r

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