ML17056C260

Ack Receipt of Util 920924 Response to Generic Ltr 92-04, Resolution of Issues Re Reactor Vessel Water Level Instrumentation in Bwrs. Concludes That Guidance Provides Appropriate Info for Operators

ML17056C260
Person / Time
Site:	Nine Mile Point
Issue date:	02/11/1993
From:	Capra R Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
References
GL-92-04, GL-92-4, TAC-M84291, TAC-M84292, NUDOCS 9302190349
Download: ML17056C260 (8)

Text

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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205554001 February 11, 1993 Docket Nos.

50-220 and 50-410 Mr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation 301 Plainfield Road

Syracuse, New York 13212

SUBJECT:

RESPONSE

TO GENERIC LETTER 92-04, "RESOLUTION OF THE ISSUES RELATED TO REACTOR VESSEL WATER LEVEL INSTRUMENTATION IN BOILING WATER REACTORS" (TAC NOS.

M84291 AND M84292)

This letter acknowledges receipt of Niagara Mohawk Power Corporation's (NMPC's) response to Generic Letter (GL) 92-04, dated September 24, 1992.

GL 92-04 was issued by letter dated August 19, 1992, to all operating Boiling Water Reactor (BWR) Licensees.

GL 92-04 requested licensees to promptly assess the impact on their facilities of potentially erroneous level indication due to non-condensible

gases, and to implement compensatory measures and long term corrective actions as necessary.

We find acceptable:

(1)

NMPC's review and acceptance of the BWR Owners'roup (BWROG) generic analysis as being applicable to the Nine Mile Point Nuclear Station, Units 1 and 2.

(2)

NMPC's endorsement of the BWROG commitment, outlined in its letter dated August 12, 1992, regarding schedule and plans for actions to address postulated errors in BWR water level instrumentation.

(3)

NMPC's endorsement of the BWROG's Emergency Procedures Committee guidance, letter dated August 19, 1992.

This letter provides guidance for operator action in the event of level indication errors due to non-condensible gases during reactor pressure vessel (RPV) depressurization.

We also understand that you have sensitized your operators to these potential errors consistent with the BWROG guidance.

(4)

NMPC's commitment to implement the longer term BWROG finding resulting from their experimental and analytical programs on a

schedule consistent with the BWROG program, as documented in their letter of August 12,

1992, and discussed at the October 29,

1992, meeting with the NRC.

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Mr. B. Ralph Sylvia February ll, 1993 On October 23,

1992, the BWROG approved refined operator guidance developed by the Emergency Procedures Committee, sent to your staff on October 16,

1992,

,for response to instrument errors due to non-condensible gases.

We feel that this guidance provides appropriate information for operators to adequately identify and deal with potentially inaccurate RPV level instrumentation, and expect that this or equivalent guidance, has been incorporated into your station operations.

Should you have any questions, please contact the Unit No.

1 Project Manager, Donald S. Brinkman, at (301) 504-1409 or the Unit No.

2 Project

Manager, John,Menning, at (301) 504-1406.

Sincerely, cc:

See next page

%mrna. C~

Robert A. Capra, Director Project Directorate I-1 Division of Reactor Projects I/II Office of Nuclear Reactor Regulation

Hr. B. Ralph Sylvia Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station Unit Nos.

1 and 2

CC:

Hark J. Wetterhahn, Esquire Winston

& Strawn 1400 L Street, NW Washington, DC 20005-3502 Supervisor Town of Scriba Route 8, Box 382

Oswego, New York 13126 Hr. Neil S.

Cams Vice President Nuclear Generation Niagara Mohawk Power Corporation Nine Nile 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 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 Hs.

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

Albany, New York 12223 Hr. Kim Dahlberg Unit 1 Station Superintendent Nine Mile Point Nuclear Station Post Office Box 32

Lycoming, New York 13093 Mr. Hartin J.

McCormick Jr.

Plant Manager, Unit 2 Nine Mile Point Nuclear Station Post Office Box 32

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

Syracuse, New York 13212 Hr. Richard Goldsmith Syracuse University College of Law E. I. White Hall Campus

Syracuse, New York 12223 Hr. Richard H. Kessel Chair and Executive Director State Consumer Protection Board 99 Washington Avenue

Albany, New York 12210

Hr. B. Ralph Sylvia February 11, 1993 On October 23,

1992, the BWROG approved refined operator guidance developed by the Emergency Procedures Committee, sent to your staff on October 16,

1992, for response to instrument errors due to non-condensible gases.

We feel that this guidance provides appropriate information for operators to adequately identify and deal with potentially inaccurate RPV level instrumentation, and expect that this or equivalent guidance, has been incorporated into your station operations.

Should you have any questions, please contact the Unit No.

1 Project Manager, Donald S. Brinkman, at (301) 504-1409 or the Unit No.

2 Project Hanager, John Henning, at (301) 504-1406.

Sincerely, Original signed by:

cc:

See next page DISTRIBUTION:

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Docket File NRC

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