ML19309B068

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Forwards Safety Evaluation Supporting 770209 re-evaluation of ECCS Cooling Performance.Approves Application of Model
ML19309B068
Person / Time
Site: Rancho Seco
Issue date: 05/03/1977
From: Reid R
Office of Nuclear Reactor Regulation
To: Mattimoe J
SACRAMENTO MUNICIPAL UTILITY DISTRICT
Shared Package
ML19309B069 List:
References
NUDOCS 8004020673
Download: ML19309B068 (2)


Text

H ISTRIBUTION:

M. Mendonca NRC PDR D. Neighbors Local PDR

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MAY 3 1977 ORB #4 Rdg.

VStello KRGoller TJCarter Docket No.:

50-312 RWReid e

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'9 Sacramento Municipal Utility District DEisenhut ATTN: Mr. J. J. Mattimoe TBAbernathy Assistant General Manager JRBuchanan and Chief Engineer ACRS(16) 6201 S Street Gray File P.O. Box 15830 Sacramento, California 95813 Gentlemen:

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By letter dated February 9,1977 you submitted a reevaluation of tne ECCS cooling performance for Rancho Seco Unit No. 1 in response to F

our December 7,1976 letter. Our evaluation of your submittal is contained as an enclosure to this letter.

Based on our review, we conclude that your February 9,1977 submittal satisfies the requests contained in our December 7.1976 letter. We concluded in a February 18, 1977 letter from S. A. Varga (NRC) to K. E. Suhrxe (B&W) that the revised nucleate boiling lockout logic results in a model which is wholly in conformance with 10 CFR 50 Appendix K.

We find that the application of this model is appropriate for Rancho Seco Unit No. 1.

p l-Sincerely, I

Robert W. Reid, Chief i

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Operating Reactors Branch #4 t

Division of Operating Reactors j-f Enclosure l-i cc w/ enclosure:

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ss Sacramento four.icipal Utility District cc: David S. Kaplan, Secretary and General Counsel

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Sacramento, California 95313 me Business and l'unicipal Department

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