ML18037A080

Advises That Based on Review of Util 920615 Response to NRC Request for Addl Info Re Util 910729 Response to Generic Ltr 89-10 & Results of Util Review of procedures,100 Psi Appropriate Value for worst-case Differential Requirement

ML18037A080
Person / Time
Site:	Nine Mile Point
Issue date:	08/12/1992
From:	Menning J Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
References
GL-89-10, TAC-M77788, NUDOCS 9208190106
Download: ML18037A080 (8)

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Docket No. 50-410 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555 August 12, 1992 Hr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212

SUBJECT:

CONSIDERATION OF THE RESULTS OF NRC-SPONSORED TESTS OF MOTOR OPERATED VALVES NINE MILE POINT NUCLEAR STATION, UNIT 2 (TAC NO. H77788)

By letter dated July 29,

1991, Niagara Mohawk Power Corporation (NHPC) provided the NRC with a revised response to Supplement 3 to Generic Letter (GL) 89-10, "Consideration of the Results of NRC Sponsored Tests of Motor Operated Valves."

The revised response indicated that Unit 2 feedwater motor operated valves (MOVs) 21A and B would be required to operate against a

maximum differential pressure of 100 pounds per square inch (psi).

By letter dated March 12,

1992, the NRC requested NHPC to demonstrate that these HOVs will not be required to operate against a higher differential pressure and to notify the NRC staff, in writing, of the results of this effort.

NHPC responded to the NRC staff request in a letter dated June 15, 1992.

The NRC staff has completed its review of the NHPC response of June 15, 1992.

This review also considered information that NHPC personnel provided to NRC inspectors during the MOV team inspection on June 22-26,

1992, at Nine Mile Point Nuclear Station.

(The results of this inspection are documented in NRC Inspection Report Nos.

50-220/92-82 and 50-410/92-82.)

Specifically, the inspectors were advised that a

NMPC review of system operating procedures and emergency operating procedures indicated that feedwater HOVs 21A and B were not required to close against feedwater pump discharge pressure.

Based on the NMPC response of June 15,

1992, and the results of the NMPC review of procedures, the NRC staff agrees that 100 psi is an appropriate value for the worst-case differential pressure requirement for these valves.

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B. Ralph Sylvia August i2, 1992 As indicated in our letter of Harch 12,

1992, the NRC staff considers NHPC's response to Supplement 3 to GL 89-10 complete.

The NRC staff considers it appropriate for NHPC to address the HOVs applicable to Supplement 3 as part of its GL 89-10 program and schedule, unless further information dictates accelerated action.

Sincerely, John E. Henning, Project Hanager Project Directorate I-l Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation cc:

See next page

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Hr. B. Ralph Sylvia August 12, 1992 As indicated in our letter of March 12,

1992, the NRC staff considers NHPC's response to Supplement 3 to GL 89-10 complete.

The NRC staff considers it appropriate for NMPC to address the HOVs applicable to Supplement 3 as part of its GL 89-10 program and schedule, unless further information dictates accelerated action.

Sincerely, Original signed by:

cc:

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

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

Washington, DC 20005-3502 Hr. Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus

Syracuse, New York 12223 Resident Inspector Nine Mile Point Nuclear Station P. 0.

Box 126

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

Syracuse, New York 13202 Mr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212 Hs.

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

Albany, New York 12223 Supervisor Town of Scriba Route 8, Box 382

Oswego, New York 13126 Regional Administrator, Region I

U. S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 Charles Donaldson, Esquire Assistant Attorney General New York Department of Law 120 Broadway New York, New York 10271 Hr. Richard H. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue

Albany, New York 12210 Hr. Hartin J.

HcCormick Jr.

Plant Manager, Unit 2 Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation P. 0.

Box 32

Lycoming, New York 13093 Hr. Neil S.

Cams Vice President - Nuclear Generation Nine Mile Point Nuclear Station Niagara Mohawk Power Corporation P. 0.

Box 32

Lycoming, New York 13093

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