ML20147C656

Forwards Request for Addl Info Discussed During 871110 Telcon Re Util 870120 Proposed Tech Spec Change Re Surveillance Requirements for Power Lockout of Accumulator Isolation Valves.Response Requested within 30 Days

ML20147C656
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	01/12/1988
From:	Chan T Office of Nuclear Reactor Regulation
To:	Cockfield D PORTLAND GENERAL ELECTRIC CO.
References
TAC-64533, NUDOCS 8801190308
Download: ML20147C656 (3)

Text

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January 12, 1988 Docket No. 50-344 Mr. David W. Cockfield Vice President, Nuclear Portland General Electric Company 121 S.W. Salmon Street Portland, Oregon 97204

SUBJECT:

TROJAN PROPOSED TECHNICAL SPECIFICATION CHANGE REGARDING SURVEILLANCE REQUIREMENTS FOR POWER LOCK 0UT OF THE ACCUMULATOR ISOLATION VALVES (LCA 150, TAC NO. 64533)

By letter dated January 20, 1987, Portland General Electric Company'(PGE) requested a change to the Trojan Technical Specifications regarding the disconnection of power from the accumulator isolation valve operators.

By letter dated October 2, 1987, PGE responded to the staff's July 28, 1987 request for additional infomation on this subject, und on November 10, 1987, provided supplerrental information in a telephone conference.

The enclosure to this letter requests information which was discussed during the telephone conference, and is provided for the purpose of record.

We ask that you provide the requested infomation t Itained in the enclosure within 30 days from receipt of this letter, or provide an alternate schedule for doing so within 15 days.

Sincerely, original signed by Terence L. Chan, Project Manager Project Directorate V Division of Reactor Projects - III, IV, Y and Special Projects Office of Nuclear Reactor Regulation i

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Enclosure:

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Mr. David W. Cockfield Portland General Electric Company Trojan Nuclear Plant cc:

Senior Resident Inspector U.S. Nuclear Regulatory Commissien Trojan Nuclear Plant Post Office Box 0 Rainier, Oregon 97048 Michael J. Sykes, Chairman Board of County Commissioners Columbia County St. Helens, Oregon 97501 Mr. William T. Dixon Oregon Department of Energy Salem, Oregon 97310 Regional Administrator, Region Y U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 k'elnut Creek, California 94596 e

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TROJAN NUCLEAR PLANT PROPOSED TECHNICAL SPECIFICATIch CHANGE REGARDING SURVEILLANCE REQUIRENENT5 FOR POWER LOCK 00T OF THE ACCUMULATOR ISOLATION VALVfS On a November 10, 1987 phone conversation, the staff discussed with you the details for implementing License Change Application 150 which consists of a proposed technical specification amendment and the addition of reans for locking out control power to the accumulator isolation valves from the control room. As a result of that converstion, the staff finds it needs confirt,ation of information to finalize its review of this item.

1.

Verify that correct operation of the lockout switch contact will be tested at least once every 12 months during the shutdown. The Trojan Technical Specification should be revised to include this action.

2.

Provide a discussion of the independence of the slider contacts which provide the lockout function on the accumulator isolation valve control switch to the rotating contacts which provide the operating function.

Describe any single electrical or mechanical failure that could simultaneously cause the lockout contacts and operating contacts (in the valve close circuit) to close or remain closed when the switch is placed in the lockout position.

3.

Reference an operating procedure which controls the removal of the i

blocking collar from the accurulator isolation control switch when it is in the lockout position, i

4 Provide a discussion of the alarms available in the control room that alert the operator to an accumulator isolation valve that is not in the fully open position. Are the power supplies and limit switches to these alarms independent of those which provide valve position indication at e

j the accumulator isolation valve control switch?

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