ML20129G440

Part 21 Rept Re Failure of Inner Polar Connector Between Damper Bar Circuit on Generator Main Field.Cause of Failure Not Defined.Further Investigation Necessary

ML20129G440
Person / Time
Site:	Calvert Cliffs, Peach Bottom, Three Mile Island, Vermont Yankee, 05000000
Issue date:	05/29/1985
From:	Leusink H LOUIS ALLIS CORP. (DIV. OF MAGNETEK, INC.)
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-85, REF-PT21-85-268-000 PT21-85-268, PT21-85-268-000, NUDOCS 8506070269
Download: ML20129G440 (1)

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A Duon @ Muyd. rc 427 E. Stewart St., P.O. Box 2020, Milwaukee, WI 53201-2020 414-481-6000 TWX 910-262-3115 May 29, 1985 Dr. Thomas E. Murley U. S. Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

10CFR 21 - BG&E - Calvert Cliffs Generator Failure

Reference:

Telephone Notification 5/17/85 Letter to Dr. Murley dated 5/21/85

Dear Dr. Murley:

The nature of the casualty on the subject generator was a failure of the inner polar connector between the damper bar circuit on the generator main field.

At the present time the cause of this failure has not been defined and further investigation is necessary.

There are four sites that utilize generators of this type. They are as follows:

1. Vermont Yankee @ Vernon Station, Vernon, VI - 2 units

2. Philadelphia Electric, Peach Bottom 2 & 3 - 4 units

3. Baltimore Gas & Electric, Calvert Cliffs 1 & 2 - 3 units

4. Metropolitan Edison, Three Mile Island - 2 units Locations 2 and 4 were notified by others of the potentir 1 problem and have been in contact with Louis Allis for additional information. Location 1 above was notified by telephone on May 29, 1985 by the writer. The person contacted was Mr. Don Dyer, Operations Quality Coordinator.

At the present time Louis Allis engineering is reviewing the reports from the field in an effort to determine the cause of failure and will be forwarding that information to Fairbanks Morse / Colt Industries for their corrective action.

Sincerely, H. H. Leusink u Vice President, Engineering HHL:sd cc: Louis Allis Colt Industries E. H. Klessig M. Morlority, Manager Sales J. G. Borman B. Saylor, Vice President Quality Assurance A. B. Giesecke H. A. Schreiber 8506070269 850 PDR ADOCK 0 p ,7 g 5 lftp