ML17059A316

Discusses BWROGs Submittal of NEDO-31558 Position on NRC Regulatory Guide 1.97,Rev 3,Requirements for Post-Accident Neutron Monitoring Sys, in Regard to Section 6.2 of GL 82-33

ML17059A316
Person / Time
Site:	Nine Mile Point
Issue date:	05/23/1994
From:	Brinkman D Office of Nuclear Reactor Regulation
To:	Sylvia B NIAGARA MOHAWK POWER CORP.
References
RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, TAC-M69209, NUDOCS 9405310031
Download: ML17059A316 (8)

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Docket No. 50-220 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, O.C. 2055&0001 May 23, 1994 Mr. B. Ralph Sylvia Executive Vice President, Nuclear Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.

Box 63

Lycoming, New York 13093

SUBJECT:

ACCEPTABILITY OF POST-ACCIDENT NEUTRON FLUX MONITORING INSTRUHENTATION AT NINE MILE POINT NUCLEAR STATION UNIT NO.

1 (TAC NO. H69209)

Section 6.2 of Generic Letter 82-33 requested applicants and licensees to provide a report on their implementation of Regulatory Guide (RG) 1.97.

The Boiling Water Reactors Owners Group responded by submitting NED0-31558, "Position on NRC Regulatory Guide 1.97, Revision 3, Requirements for Post-Accident Neutron Monitoring System," which proposed alternative'riteria for neutron flux monitoring instrumentation in lieu of the Category 1 criteria stated in the RG.

In a safety evaluation dated January 13, 1993, the NRC staff concluded that the criteria of NEDO-31558 were acceptable.

By letter dated April 15, 1993, the staff requested Niagara Mohawk Power Corporation (NHPC) to review the Nine Mile Point Nuclear Station Unit No.

1 (NHP-1) neutron flux monitoring instrumentation against the criteria of NEDO-31558 and document the results of NHPC's review.

NHPC was also requested to review the emergency operating procedures to assure that there is no plant-specific role for neutron flux monitoring that differs from that identified in NED0-31558.

NMPC's letter of June 18, 1993, provided the results of NHPC's review.

In this letter NHPC made a commitment to calculate the instrument loop accuracy and either meet NEDO-31558 accuracy criteria or provide appropriate supporting justification for deviating from the criteria.

NHPC also stated that the role of neutron flux monitoring at NHP-1 is essentially the same as that at all other boiling water reactors (BWRs).

The staff completed its review of NHPC's June 18, 1993, submittal and concluded, in a letter dated February 10, 1994, that the post-accident neutron flux monitoring instrumentation at the NHP-1 meets the criteria of NEDO-31558 and is, therefore, an acceptable alternative to the guidance in RG 1.97.

By letter dated May 2,

1994, NHPC provided the results of the instrument loop accuracy calculation and a justification for deviating from the NEDO-31558 I

accuracy cr iteria.

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

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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. Louis F. Storz Vice President Nuclear Generation Niagara Hohawk Power Corporation Nine Mile Point Nuclear Station P.O.

Box 63

Lycoming, New York 13093 Resident Inspector U.S. Nuclear Regulatory Commission P.O.

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. Richard B. Abbott Unit 1 Plant Manager Nine Nile Point Nuclear Station P.O.

Box 63

Lycoming, New York 13093 Mr. David K. Greene Manager Licensing Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.

Box 63

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 Yor k Department of Public Ser vice Power Division, System Operations 3 Empire State Plaza

Albany, New York 12223 Hr. Hartin J. HcCormick, Jr.

Vice President Nuclear Safety Assessment and Support Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station P.O.

Box 63

Lycoming, New York 13093

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Hr. B. Ralph Sylvia May 23, 1994 Based on NHPC's determination that the role of neutron flux monitoring at NHP-1 is essentially the same as that at all other BWRs, the staff concludes that the criteria of NEDO-31558 is applicable in lieu of the Category 1

criteria in RG 1.97.

The staff has completed its review of NHPC's Hay 2, 1994, submittal and concludes that the deviations from NEDO-31558 specified in NMPC's submital are acceptable.

Therefore, the post-accident neutron flux monitoring instrumentation at NHP-1 is an acceptable alternative to the guidance in RG 1.97.

Sincerely, cc:

See next page Donald S. Brinkman, Senior Project Manager Project Directorate I-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation

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C Mr. B. Ralph Sylvia May 23, 1994 Based on NMPC's determination that the role of neutron flux monitoring at NMP-1 is essentially the same as that at all other BWRs, the staff concludes that the criteria of NEDO-31558 is applicable in lieu of the Category 1

criteria in RG 1.97.

The staff has completed its review of NMPC's May 2, 1994, submittal and concludes that the deviations from NEDO-31558 specified in NMPC's submital are acceptable.

Therefore, the post-accident neutron flux monitoring instrumentation at NMP-1 is an acceptable alternative to the guidance in RG 1.97.

Sincerely, I

0glGINAl SlGNED QY cc:

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

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