ML20147B227

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Current Schedule for Submittal to NRC Staff of Required Rev ECCS Analysis & Associated Tech Spec Changes Is 780105.We Scheduled Rev Analysis for Subj Facil to Begin Late 781031
ML20147B227
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 10/03/1978
From: Naughton W
COMMONWEALTH EDISON CO.
To:
Office of Nuclear Reactor Regulation
References
NUDOCS 7810100025
Download: ML20147B227 (1)


Text

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~N I -

) Conuninw:cith Edison One First National Plaza. Chicago, Illinois I

( l N O,/Address Chicago,Reply Illinois to: Post Office Box 767 60690 l

1 October 3, 1978 l Director of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Zion Station Units 1 and 2 Schedule for Revised ECCS Evaluation NRC Docket Nos. 50-295 and 50-304 Reference (a): September 13, 1978 letter from A.

Schwencer to Cordell Reed requesting schedule for submittal of a revised ECCS evaluation for Zion Station

Dear Sir:

Per Reference (a) , Commonwealth Edison Company was requested to provide the NRC Staff with a schedule for sub-mittal of a revised analysis of ECCS cooling performance for Zion Station Units 1 and 2. This analysis is to be calculated in accordance with the revised Westinghouse ECCS evaluation model approved by the NRC Staff in August 1978.

Westinghouse has currently scheduled a revised analysis for the Zion units to begin in late October 1978.

Upon receipt of the results of this analysis Commonwealth Edison l

will prepare, review and approve the appropriate Zion Station Technical Specification changes associated with the revised analysis for submittal to the NRC Staff.

Based on the above, Commonwealth Edison's current

( schedule for submittal to the NRC Staff of the required revised ECCS analysis and its associated technical specification changes is January 5, 1979.

Very truly yours, g l >[ William F. Naughton Nuclear Licensing Administrator Pressurized Water Reactors l

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