TXX-6533, Final Deficiency Rept CP-86-79 Re over-torqued Westinghouse AR Relays.Initially Reported on 861107.Design Change Authorization Being Prepared to Increase Allowable Range for Relays.Item Found Not Reportable Per 10CFR50.55(e)

Final Deficiency Rept CP-86-79 Re over-torqued Westinghouse AR Relays.Initially Reported on 861107.Design Change Authorization Being Prepared to Increase Allowable Range for Relays.Item Found Not Reportable Per 10CFR50.55(e)

ML20215J398
Person / Time
Site:	Comanche Peak
Issue date:	06/19/1987
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-86-79, TXX-6533, NUDOCS 8706240421
Download: ML20215J398 (1)

Text

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nlELECTRIC une 19, 1987 )

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U.' S. Nuclear Regulatory Commis'sion ATTN: Document Control Desk Washington, DC '20555'

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) ,

DOCKET NOS. 50-445 AND 50-446- '

OVER-TORQUED WESTINGH0USE AR RELAYS' SDAR:. CP-86-'79 (FINAL REPORT)

Gentlemen:

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. Our last interim report logged was TXX-6363 dated March 30, 1987.

- Specifically, the terminal screws had a specified torque requirement of 9.5

.0.5 inch-pounds. The torque wrench used at CPSES would have allowed a range of 9.5 1.5 inch-pounds. We have received an evaluation from Westinghouse, the ' supplier of the relays, which concludes that a torque range of 8 to 11

. inch-pounds is acceptable and will not affect the equipment operability or its qualified'11fe. Operability of the installed conditions has been confirmed by the-Start-up test group.

A Design Change Authorization is currently in preparation to increase the allowable range to 8 to 11 inch pounds for the subject Westinghouse AR relays.

The change will also be incorporated into site specifications and drawings.

We have concluded that had this condition remained uncorrected, no adverse condition regarding the safety of plant operations would exist. This issue is not' reportable under the provisions of 10CFR50.55(e).

Documentation supporting this position is available at CPSES for your inspectors' review.

Very truly yours, L

7 W. G. Counsil RDD/dl c - R. D. Martin, Region IV q Resident' Inspectors, CPSES (3) 8706240421 870619M ,

PDR ADOCK 05000445 / 3 0

S PDRs

@ North Olive Street LB 81 Dallas, Texas 75201 Il