ML19260C878

Submits Clarification of Util Status on Degraded Voltage Mods.Will Submit Second Level Coincident Logic Design W/ Required Supporting Analysis & Documentation for Review, Comment & Approval by 800303

ML19260C878
Person / Time
Site:	Rancho Seco
Issue date:	01/24/1980
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Reid R Office of Nuclear Reactor Regulation
References
TAC-10968, NUDOCS 8002060330
Download: ML19260C878 (1)

Text

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SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 s street, Box 15830, sacramento, California 95813; (916) 452-3211 January 24, 1980 Director of Nuclear Reactor Regulation Attention:

Mr. Robert W. Reid, Chief Operating Reactor, Branch 4 U.S. Nuclear Regulatory Commission Washincton, D.C. 20555 Docket No. 50-312 Rancho Seco Nuclear Generating Station, Unit No. 1

Dear Mr. Reid:

A clarification of the District's status on the degraded voltage modifications has been reouested by the NRC Staff. This informat.on is listed below.

The District's October 17, 1979 and December 6,1979 letter, in response to the NRC's August 8,1979 letter, is based on the existing onsite emergency distribution system at Rancho Seco.

It does not include the second level of coincident logic required by the NRC's June 3,1977 letter.

The purpose of the October 17, 1979 letter and the December 6, 1979 letter, was to demonstrate the adequacy of the District's existing system while the design and installation of the new system was progressing.

The District will submit to the NRC by March 3,1980, the second level coincident logic design with all required supporting analysis and documentation for review, coment, and approval. This letter will address all issues raised by the NRC in their June 3,1977 and August 8,1979 letters.

Sincerely, b b hWM chn J. Mattinoe Assistant General Manager and Chief Engineer 1933 081 Ao6 s

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8002060