TXX-6141, Interim Deficiency Rept CP-86-79 Re Possible Overtightening of Contact Cartridge Terminal Screws on Westinghouse AR Relays.Initially Reported on 861107.Next Rept Will Be Submitted by 870128
| ML20215D719 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 12/05/1986 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| CP-86-79, TXX-6141, NUDOCS 8612170009 | |
| Download: ML20215D719 (1) | |
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Log # TXX-6141 File # 10110 908.3 TEXAS UTILITIES GENERATING COMPANY December 5, 1986
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WILLIAM G. COUNSIL I
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Mr. Eric H. Johnson. Director N
Division of Reactor Safety and Projects U. S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 OVERT 0RQUED WESTINGHOUSE AR RELAYS SDAR: CP-86-79 (INTERIM REPORT)
Dear Mr. Johnson:
On November 7,1986, we verbally notified your Mr. T. Westerman of a deficiency involving the possible overtightening of the contact cartridge terminal screws on the Westinghouse AR relays. This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e).
The specific issue involves the tool being used to tighten the terminal screws on the Westinghouse AR relays not being calibrated to the required accuracy.
Overtightening of the screws could possibly result in the deformation of the stationary contact assembly, reducing contact overtravel, which may result in loss of contact continuity.
We are continuing our evaluation and anticipate submitting our next report by January 28, 1987.
Very truly yours, llOL W. G. Counsil RDD/gj c - NRC Region IV (Original + 1 copy)
Director, Inspection & Enforcement (15 copies)
U. S. Nuclear Regulatory Commission Washington, D. C.
20555 8612170009 861205 DR ADOCK 0500 5
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