05000334/LER-1981-006, Forwards Updated LER 81-006/03X-1.Detailed Event Analysis Encl

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Forwards Updated LER 81-006/03X-1.Detailed Event Analysis Encl
ML20054M062
Person / Time
Site: Beaver Valley
Issue date: 06/28/1982
From: Williams H
DUQUESNE LIGHT CO.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20054M063 List:
References
ND1SS1:567, NUDOCS 8207090207
Download: ML20054M062 (3)


LER-2081-006, Forwards Updated LER 81-006/03X-1.Detailed Event Analysis Encl
Event date:
Report date:
3342081006R00 - NRC Website

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Telephone (412) 4564000 Nuclear Division P O. Box 4 Shippingport, PA 15077 6 June 28, 1982 NDISS1:567 Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 LER 81-06/03X-1 Mr. R. C. Ilaynes, Regional Administrator United States Nuclear Regulatory Commission Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr.11aynes:

In accordance with Appendix A, Beaver Valley Technical Specifications, the following Licensee Event Report is submitted:

LER 81-06/03X-1, Technical Specification 3.6.3, Emergency Core Cooling Systems.

Very truly yours,

%A II. P. Willia m Superintendent Attachment c 'f' 8207090207 820628 }g /

PDRADCCK05000g S

1 Mr. R. C. Haynes June 28, 1982 NDISSI:567 Page 2 cc: Director Of Management & Program Analysis-United States Nuclear Regulatory Commission Washington, D. C. 20555 J. Hultz, Ohio Edison Director, Office of Inspection and Enforcement Headquarters United States Nuclear Regulatory Commission Washington, D. C. 20555 W. J. Ross, BVPS Licensing Project Manager l United States Nuclear Regulatory Commission Washington, D. C. 20555 W. M. Troskoski, Nuclear Regulatory Commission, BVPS Site Inspector Mr. Alex Timme, CAPCO Nuclear Projects Coordinator, . Toledo Edison Records Center, Institute of Nuclear Power Operations, Atlanta, Georgia C. E. Muckle, Factory Mutual Engineering, Pittsburgh Arthur Alford, Stone & Webster / Boston i

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Attachment to LER 81-06/03X-1 Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 To alleviate further heat tracing problems, the following actions have been taken:

1) A member of the Operations Support Group has been assigned to review the Weekly Heat Trace Log and assure required tests and/or repairs are scheduled. He has also been assigned to monitor Maintenance Department records for each circuit to identify potential problematic circuits. These circuits will be evaluated for possible changes to their alarm setpoints.
2) Alarm and control setpoints for the Refueling Water Storage Tank and piping were reset to allow the heet trace circuits to operate without unnecessary alarms.
3) Problem circuits previously identified were checked daily until their reliability was reestablished. Presently all annunciator panels are checked weekly and alarms are investigated immediately.
4) An evaluation of the type of heat trace in use is r.ow conducted for each circuit as conditions warrant replacement.
5) To ensure continued reliable performance, the Operations Support Group has been assigned to coordinate with the Maintenance Group to schedule a check-out of all heat trace circuits once a year prior to the cold weather season. The check-out includes the verification of control and alarm setpoints, an inspection of insulation integrity, the resealing of junction box covers as required, and the energizing of all circuits to assure their continuing operability.
6) Drawings illustrating circuit locations were generated for all- permanent circuits. A master list which provides setpoint and physical location information, organized by annunciator panels is maintained and updated by the Operations Support Group. The current updated list has been inserted in the Operating Manual. A priority circuit list was generated for the Maintenance Department as to which circuits require more immediate attention in the event of multiple circuit failures. System circuits exposed to severe weather conditions and circuits for 12% Boric Acid systems are examples of high priority items.
7) Circuits that had been frequently alarming were evaluated and alarm setpoints changed as necessary to eliminate the purely nuisance alarms.

The implementation of these actions has resulted in significant improvement in heat trace performance. No safety-related equipment had to be declared inoperable due to the loss of heat trace during the past winter season.