TXX-4465, Interim Significant Deficiency Rept SDAR-174 Re Unauthorized & Undocumented Welding Repairs to Pipe Support & Two Cable Tray Supports.Initially Reported on 850322.Structurally Impaired Support to Be Replaced by 850501

Interim Significant Deficiency Rept SDAR-174 Re Unauthorized & Undocumented Welding Repairs to Pipe Support & Two Cable Tray Supports.Initially Reported on 850322.Structurally Impaired Support to Be Replaced by 850501

ML20116F809
Person / Time
Site:	Comanche Peak
Issue date:	04/19/1985
From:	Wells J TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Hunter D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
SDAR-174, TXX-4465, NUDOCS 8505010246
Download: ML20116F809 (2)

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TEXAS UTILITIES GENERATING COMPANY M KYWAY TOWER . 400 NORTH OLIVE MTHEET, L.ll. MI .1,ALLAN, TEXAM 73201 April 19, 1985 TXX-4465 Mr. D.R. Hunter, Chief Reactor Project Branch 2 U.S. Nuclear Regulatory Commission Office of Inspection & Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket No.: 50-446 Arlington, TX 76012 COMANCHE PEAK STEAM ELECTRIC STATION UNAUTHORIZED SUPPORT REPAIRS QA FILE: CP-85-14, SDAR-174 FILE N0.: 10110

Dear Mr. Hunter:

In accordance with 10CFR50.55(e), we are submitting the enclosed written report of actions taken to correct a deficiency regarding an uninvolved employee that identified some unauthorized repairs made to a hanger. This deficiency was originally reported to your Mr. D. Hunnicutt on March 22, 1985.

Supporting documentation is available at the CPSES site for your Inspector's review.

Very truly yours, 8505010246 B50419 b PDR ADOCK 05000446 S PDR ,J[R. Wells

,/ Director, Quality Assurance JRW:tig Attachment cc: NRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement (15 copies)

U.S. Nuclear Regulatory Commission Washington, DC 20555

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r TXX-4465 4/19/85 Page 2 .

ATTACHMENT UNAUTHORIZED SUPPORT REPAIRS Description As a result of an unsolicited observation made by an employee to TUGCo Management, unauthorized and undocumented welding repairs have been identified.

Evaluation by site persorinel has concluded the concern involves a pipe support and two (2) cable tray supports. Analysis by site Engineering has concluded the structural integrity of the pipe support and one (1) cable tray support is not impaired as a result of the repair. The remaining cable tray support, however, will require disposition.

The unauthorized repair involves base metal defects of indeterminate quality.

The cable tray support provides assurance that Class IE cable installations remain intact during a seismic event. Failure of this support could result in overstressed or failure conditions for the associated electrical systems.

The affected supports have been documented by site nonconformance reports.

A recent survey by site construction management has revealed the concern is isolated.

Safety Implications In the event the defects had remained undetected, operator actions could be adversely affected during accident conditions.

Corrective Action In accordance with the nonconformance report, the support has been dispositioned for rework. The affected support member will be replaced. These activities should be completed no later than May 1, 1985.

Please note, the process documents involved in this deficiency are as follows:

A) Pipe Support FW-2-096-432-C62R, NCR-M-15,965, and B) Cable Tray Supports CTH-11549 & 9760, NCR-M-85-200233

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