ML20247H641

Advises That 890816 Revisions to ATWS Mitigation Sys Acceptable W/Requirements of 10CFR50.62(c)(1)

ML20247H641
Person / Time
Site:	Byron, Braidwood, 05000000
Issue date:	09/12/1989
From:	Olshan L Office of Nuclear Reactor Regulation
To:	Kovach T COMMONWEALTH EDISON CO.
References
NUDOCS 8909200051
Download: ML20247H641 (3)

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?t September 12, 1989 y

' Docket Nos.. 50.454, 50-455, 50-456, and 50-457 J

Mr. Thomas J. Kovach I

i Nuclear Licensing Manager

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Commonwealth Edison Company P.O. Box 767 Chicago, Illinois 60690

SUBJECT:

ATWS RULE (10 CFR 50.62) - BYRON /BRAIDWOOD By letter dated August 16, 1989, you identified four revisions'to the ATWS mitigation system that we approved. These revisions'are the result of human factors engineering reviews that you had not finished when we wrote our Safety Evaluations.

We have ' reviewed the revisions proposed in your August 16, 1989 letter and find them acceptable. With these revisions, we still conclude that the ATWS design you have proposed is in compliance with the ATWS Rule requirements of 10 CFR 50.62, paragraph (c)(1).

Sincerely, 8%

A Leonard N. 01shan, Project Manager Project Directorate III-2 Division of Reactor Projects III, IV, V, and Special Projects cc:

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i September.' 12, 1989.

Docket flos. 50-454, 50-455, 50-456, and 50-457 Mr. Thomas J. Kovach Nuclear Licensing Manager

' Commonwealth Edison Company P.O. Box 767 Chicago, Illinois 60690

SUBJECT:

. ATWS RULE (10 CFR 50.62) - BYRON /BRAIDWOOD By letter dated August 16, 1989, you identified four revisions to the ATWS mitigation system that we approved. These revisions are the result of human factors engineering reviews that you had not finished when we wrote our Safety Evaluations.

We have reviewed the revisions proposed in your August 16, 1989 letter and find them acceptable. With these revisions, we still conclude that the ATWS de, sign you have proposed is in compliance with the ATWS Rule requirements of 10CFR50.62, paragraph (c)(1).

Sincerely,

/6 Leonard N, 01shan, Project Manager Project Directorate III-2 Division of Reactor Projects III, IV, V, and Special Projects cc:

L. Tran DISTRIBUTION Docket file PDIII-2 r/f NRC & Local PDRs MVirgilio LLuther PShemanski LKokaj ko OGC EJordan ARCS (10)

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September 12, 1989 Docket Nos. 5(bj54, 50-455, 50-456,' and 50-457 Mr. Thomas J. Kovach Nuclear Licensing Manager Commonwealth Edison Company P.O. Box 767 Chicago, Illinois 60690

SUBJECT:

ATWSRULE(10CFR50.62)-BYRON /BRAIDWOOD By letter dated August 16, 1989, you identified four revisions to the ATWS mitigation system that we approved. These revisions are the result of human factors engineering reviews that you had not finished when we wrote our Safety Evaluations.

We have reviewed the revisions proposed in your August 16, 1989 letter and find them accfiptable. With these. revisions, we still conclude that the ATWS design you have proposed is in compliance with the ATWS Rule requirements of 10CFR50.62, paragraph (c)(1).

Sincerely,

/6 Leonard N. Olshan, Project Manager Project Directorate III-2 Division of Reactor Projects III, IV, V, and Special Projects cc:

L. Tran DISTRIBUTION Docket file PDIII-2 r/f NRC & Local PDRs MVirgilio LLuther PShemanski LKokajko OGC EJordan ARCS (10)

PDIII-2 2

PDIII PDIII-2 L01shan SSands LLuthe PShemanski 9/ q /89 9/ ~]' /89 9/// /89 9/ /2./89

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