ML17055C476

Advises That Proposal to Test Automatic Depressurization Sys Manually Operated Inhibit Switch in Accordance W/Section 6.8 of Administrative Controls Section of Tech Specs,Using Written Procedures Acceptable

ML17055C476
Person / Time
Site:	Nine Mile Point
Issue date:	10/01/1986
From:	Zwolinski J Office of Nuclear Reactor Regulation
To:	Mangan C NIAGARA MOHAWK POWER CORP.
References
TAC-61328, NUDOCS 8610080446
Download: ML17055C476 (4)

Text

October 1,

1986 Docket No. 50-220 Niagara Mohawk Power Corporation Attn:

Mr. C. V. Mangan Senior Vice President c/o Miss Catherine R. Seibert 300 Erie Boulevard West

Syracuse, New York 13202 DISTRIBUTION C~~

NRC PDR Local PDR J. Zwolinski BWD1 Rdg File R. Bernero OGC" SF1'H E. Jordan B. Grimes J. Partlow N. Thompson J. Kelly C. Jamerson ACRS (10)

T. Collins NMP File

SUBJECT:

AUTOMATIC DEPRESSURIZATION SYSTEM MASTER INHIBIT SWITCH (TAC 61328)

Re:

Nine Mile Point Nuclear Station, Unit No.

1 In a letter dated April 14, 1986, you informed the staff of your intentions concerning the testing requirements of the Automatic Depressurization System (ADS) master inhibit switch.

As a result of the review of TMI Item II.K.3. 18, you proposed to install a manual inhibit switch in the ADS logic circuitry.

The purpose of the switch is to facilitate operator response in accordance with the BWR Emergency Procedures Guidelines during various postulated events.

Incorporation of the inhibit switch permits the operator to block premature blowdown with a single action.

The manually operated inhibit switch was installed during the Spring 1986 refueling outage.

In light of both industry and Nuclear Regulatory Commission technical specification improvement programs, you have proposed to periodically test this switch outside of the purview of the technical specifications (TS).

Instead, the switch wi11 be tested using written procedures in accordance with Section 6.8, Procedures, of the Administrative Controls Section of the TS.

The staff has reviewed this activity and finds it acceptable.

Sincere ly, Original signed by:

John A. Zwolinski, Director BWR Project Directorate 81 Division of BWR Licensing cc:

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Mr. C. V. Mangan Niagara Mohawk Power Corporation Nine Mile Point Nuclear Station, Unit, No.

1 CC:

Troy B. Conner, Jr., Esquire Conner A Wetterhahn Suite 1050 1747 Pennsylvania

Avenue, N.

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Washington, D.

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20006 Frank R. Church, Sunervisor Town of Scriba R.

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Oswego, New York 13126 Niagara Mohawk Power Corporation ATTN:

Yr. Thomas Perkins Plant Superintendent Nine Mile Point Nuclear Station Post Office Box 32

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

Lycoming, New York 13093 John W. Keib, Esquire Niagara Mohawk Power Corpora'tion 300 Erie Boulevard West

Syracuse, New York 13202 Regional Administrator, Region I U. S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Mr. Jay Dunkleberger Division of Policy Analysis and Planning New York State Energy Office Agency Building 2 Empire State Plaza

Albany, New York 12223

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