ML17056B493

Forwards Supplemental Safety Evaluation Accepting Licensee Response to Staff 910701 SE Re Station Blackout Rule

ML17056B493
Person / Time
Site:	Nine Mile Point
Issue date:	11/06/1991
From:	Brinkman D Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
Shared Package
ML17056B494	List: ML17056B493 ML17056B495
References
TAC-M68570, NUDOCS 9111140201
Download: ML17056B493 (6)

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Docket No. 50-220 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 November 6, 1991 Mr. B. Ralph Sylvia Executive Vice Pres ident, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212

SUBJECT:

STATION BLACKOUT RULE SUPPLEMENTAL SAFETY EVALUATION - NINE MILE POINT NUCLEAR STATION UNIT NO. I (TAC NO. 68570)

On July 21, 1988, the Code of Federal Regulations 10 CFR Part 50, was amended to include a

new Section 50.63, entitled, "Loss of All Alternating Current Power," (Station Blackout).

The station blackout (SBO) rule requires that each light-water-cooled nuclear power plant be able to withstaJId and recover-from an SBO of specified duration.

The SBO rule also requires that information defined in the rule be provided to the staff for review.

By letters dated April 13, 1989, April 3, 1990, April 16, 1990, and January 24,

1991, and by teleconference on October 9, 1990, between Mr. Nick Spagnoletti of your staff and the NRC staff, Niagara Mohawk Power Corporation (NMPC) responded to the SBO rule.

The NRC staff's Safety Evaluation (SE) pertaining to NMPC's initial responses was transmitted to you by letter dated July I, 1991.

The NRC staff found the proposed method of coping with an SBO to be acceptable, subject to the satisfactory resolution of several recommendations which were itemized in the staff's SE.

NMPC responded to the staff's SE, and specifically to the recommendations, by letter dated August 1, 1991.

The NRC staff has reviewed NMPC's responses to the July 1, 1991, SE and has determined the responseq acceptable as detailed in the enclosed Supplemental Safety Evaluation (SSE).

NMPC should maintain all analyses and related information in the documentation supporting the SBO submittals for further inspection ahd'ssessment as may be undertaken by the NRC to audit conformance with the SBO rule.

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Ra 1 ph Sy 1 via November 6, 1991 Please notify the NRC in writing when NMPC has completed and implemented all

analyses, evaluations, and procedural changes committed to by NMPC.

This completes our review relative to TAC No. 68570.

This requirement affects fewer than nine respondents and, therefore, is not subject,to Office of Management and Budget review under P.L.96-511.

S incerely,

Enclosure:

Supplemental Safety Evaluation cc w/enclosure:

See next page Donald S. Brinkman, Senior Project Manager Project Directorate I-I Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

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Hr. B. Ralph Sylvia Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit No.

1 CC:

Mr. Mark J. Wetterhahn, Esquire Winston 5 Strawn 1400 L Street, NW.

Washington, D.C.

20005-3502 Supervisor Town of Scriba Route 8, Box 382

Oswego, New York 13126 Mr. Joseph F. Firlit Vice President - Nuclear Generation Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093 Resident Inspector U.S. Nuclear Regulatory Commission Post Office Box 126

Lycoming, New York 13093 Mr. Gary D. Wilson, Esquire Niagara Mohawk Power Corporation 300 Erie Boulevard West

Syracuse, New York 13202 Regional Administrator, Region I U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia; Pennsylvania 19406 Ms.

Donna Ross New York State Energy Office 2 Empire State. Plaza 16th Floor

Albany, New York 12223 Hr. Kim Dahlberg Unit I Station Superintendent Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093 Mr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212 Charlie Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, New York 10271 Hr. Paul D. Eddy State of New York Department of Public Service Power Division, System Operations 3 Empire State Plaza

Albany, New York 12223