ML20211H954

Requests That Dec 1987 Commitment Date Be Extended to Prior to Return to Power Following 1988 Refueling Outage to Complete Installation of Remote Shutdown Panel.Reasons for Extension & App R Commitments Affected by New Panel Listed

ML20211H954
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	02/18/1987
From:	Cockfield D PORTLAND GENERAL ELECTRIC CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
TAC-55560, NUDOCS 8702260340
Download: ML20211H954 (3)

Text

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M M g Portland General BectricCoiripray David W. Cockfield Vice President, Nuclear February 18, 1987 Trojan Nuclear Plant Docket 50-344 License NPF-1 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington DC 20555

Dear Sir:

Remote Shutdown Panel Modification In a letter dated September 14, 1984, PCE informed the NRC that several proposed alternative shutdown modifications described in the Appendix R Review Report of July 1984 could potentially impact the existing design of the auxiliary feedwater (AFW) control panel (also referred to as the C-160 panel or remote shutdown panel). It was indicated that a design study had been initiated to determine the optimal approach for providing the Appendix R alternative shutdown function. PGE committed to complete this study in April 1985, and all C-160-related modifications by December 1987.

The design study was completed in April 1985. Based on the results of that l study, it was decided to install a new remote chutdown panel (RSP) at a different location. The objective of this new design is to alleviate maintenance, operational and human factor deficiencies with the existing RSP and to increase the reliability of the AFW System, as well as to I incorporate Appendix R design commitments for alternative shutdown. In 1984, it was anticipated that a complete redesign could be accomplished by the end of 1987. However, the extent of the complexities involved in a l

complete redesign and the delays experienced in the vendor delivery I schedule were not fully evident.

l It has now become apparent that in order for the new RSP to be installed and achieve full operational status without compromising its safety function, an extension of the original commitment date is needed. PGE proposes to complete installation of the new RSP and related Appendix R modifications and achieve full operational status prior to return to power operation following the 1988 refueling outage (approximately June 1988).

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' Since Plant shutdown will commence in early April for the 1988 outage, this extension represents an approximate three-month deferral of the original l proposed schedule with the Plant in operation.

g 8702260340 EI70218 4 0 DR ADOCK 0500 l, '

121 S W S& mon Street. PortLnt OregcA 97204

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W W BBCitiCM Document Control Desk February 18, 1987 Page 2 The reasons for the extension are as follows:

1. In order to meet the December 1987 commitment, certain connections for the new RSP must be installed during the 1987 refueling outage. The 1987 refueling outage commences on April 1, 1987 and is planned to end on June 2, 1987. The vendor shipping schedule allows no margin for error or delay. The current shipping schedules for various equipment, which have already been delayed once, varies from early March to mid-April. A mid-April delivery allows no margin for recovery from any manufacturing errors or shipping damage. It is possible that additional delays could occur.

2. The original equipment delivery dates coincided with the 1987 outage.

2 However, the required drawing generation by the vendor has been delayed, which has further delayed the issuance of PCE detailed

, construction packages (DCPs). Although the engineering DCPs will arrive onsite prior to the outage, there will be little time available onsite to plan construction activities. Also, the short time available for DCP issuance may not allow the engineers adequate time to consider all engineering / construction requirements.

l 3. Testing of and training on the new RSP will require a major effort.

The test instructions will be extensive and will involve considerable time and coordination between several departments. Final test instruc-tions cannot be written until DCPs are available. The training will

, require a great deal of time in both the preparation and implementation.

Appendix R commitments affected by the new RSP, and interim compensatory measures, include the following:

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+ Installation of a decouple switch for the turbine-driven AFW pump.

Compensatory measures: hourly fire patrol of cable spreading room.

+ Installation of RCS hot- and cold-les temperature indication.

Compensatory measures: hourly fire patrol of cable spreading room and procedure for monitoring RCS wide-range temperature via RTDs from outside the control room.

+ Provision of a calibrated pressurizer level indication independent of control room / cable spreading room. Compensatory measures: hourly fire patrol of cable spreading room.

• Installation of a self-cooling unit in the existing RSP location.

4 Compensatory measures: hourly fire patrol in vicinity of AFW pump and C-160 panel rooms; also, recent experience has demonstrated acceptable C-160 panel room temperatures without room cooling. t i

W Gewurd MCortyxvi)r Document Control Desk February 18, 1987 Page 3 These compensatory measures are in existence and will be continued until completion of installation of the new RSP. In addition, written procedures for temporary hookup of neutron source range flux are in place and will be continued.

Please let me know if additional information is needed.

Sincerely.

c: Mr. John B. Martin Regional Administrator, Region V U.S. Nuclear Regulatory Commission Mr. Rob Barr Resident Inspector-Trojan Nuclear Plant Mr. David Kish, Acting Director State of Oregon Department of Energy i

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