ML19309B051

Advises That Info Requested in NRC Re Reassessment of Steam Generator & Reactor Coolant Pumps Support Matl to Be Submitted by 780131.Details Re Sys Mods, Providing Overpressure Protection to Be Submitted by 780228

ML19309B051
Person / Time
Site:	Rancho Seco
Issue date:	12/22/1977
From:	Mattimoe J SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:	Reid R Office of Nuclear Reactor Regulation
References
TAC-6710, NUDOCS 8004020527
Download: ML19309B051 (1)

Text

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$SMUD SACRAMENTO MUNICIPAL UTILITY DISTRICT O 6201 S street, Box 15830, Escramento, California 95813; (916) 452-3211 December 22,1977, ;c/T 1,-

Direc' Jr of Nuclear Reactor Regulation Attention:

Mr. Robert W. Reid, Chief n

Operating Reactors, Branch 4

' EO U. S. Nuclear Regulatory Commission

/.' s Washington, D. C.

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'.'A Docket No. 50-312 Rancho Seco Nuclear Generating

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Station, Unit No.1

Dear Mr. Reid:

Your letter of September 14, 1977 requested information for a reassessmene of the Rancho Seco Unit No.1 steam generator and reactor coolant pumps support materials. The Sacramento Municipal Utility District replied on October 19, 1977 stating that we could provide this information by December 31, 1977.

The Babcock & Wilcox Company, which is developing this data for the District, has recently informed us that they will require an additional 30 days.

We now expect that this data can be provided by January 31, 1978.

In another letter dated November 2,1977, you requested additional details on our proposed system modifications which will provide reactor vessel overpressure protection. We.1ow estimate it will require an additional 60 days to provide the information in the detail you requested and therefore expect to submit the items requested by February 28, 1978. This time is required to complete the detailed design of these proposed modifications. This level of effort has not been expended to date because the District is waiting for NRC approval of this proposed design change,'since we consider it an unreviewed safety question pursuant to 10 CFR 50.59.

Sincerely yours,

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I J. J. Mattimoe Assistant General Manager and Chief Engineer f " ^

,- 7 AN ELECTRIC SYSTEM S ". R V I N G MoRE THAN 600,000 IN THE HEART OF C ALIF0 R N B A

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