TXX-6348, Interim Deficiency Rept CP-86-07 Re Svc Water Sys Leakage. Initially Reported on 860411.Pipe Coating Insp Completed on Accessible Piping in Train a Svc Water Sys W/Coating Repairs Implemented on Problem Areas.Next Rept Expected by 870715
| ML20205H457 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 03/26/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-86-07, CP-86-7, TXX-6348, NUDOCS 8704010061 | |
| Download: ML20205H457 (2) | |
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Log # TXX-6348 P9 File # 10110
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Ref # 10CFR50.55(e) b NELECTRIC EUi[',"k,,,
March 26, 1987 l
U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 SERVICE WATER SYSTEM LEAKAGE SDAR: CP-86-07 (INTERIM REPORT)
Gentlemen:
On April 11, 1986, we notified you by our letter logged TXX-4762 of a deficiency involving weld failure and coating degradation in the Service Water System which we deemed reportable under the provisions of 10CFR50.55(e). This is an interim report submitted to status corrective actions implemented on Unit I to date. Our latest interim report, logged TXX-6351 was submitted on January 30, 1987.
l Pipe coating inspections have been completed on the accessible piping in the Train "A" Service Water System with coating repairs implemented on the identified problem areas. Weld repairs have been implemented where previously identified.
The completion of design modification ECN-426, alleviates the l
erosion / corrosion effects associated with cavitation downstream of the 1-SW-023 valve for Train "A".
A fabricated pipe spool of ASTM 316 Stainless Steel has been installed downstream of the valve.
Insulating gaskets and sleeves provide electrical isolation between disimilar materials.
A Train "B" field weld in the stainless steel line 2-SW-1-302-150-3 (Ref. TXX-4762) has been radiographed and an ultrasonic test performed on the surrounding area. As a result of the above test and related deficiency a complete weld analysis will be performed when Train "B" is out of service.
i Presently Train "B" is scheduled to be out of service at the end of March 1987.
Further an investigation will be conducted to determine whether this problem is limited to the identified areas.
B704010061 870326 A
PDR ADOCK 05000445 B
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40 North Olhe Mrect l..H Ml Dallas, lenas 75201
' March 26, 1987 Page 2 of 2 A Service Water System inspection program similar to the above will be scheduled for Unit 2 after completion of the Unit I corrective actions.
SWEC Engineering (Boston) is performing a corrosion study to provide recommendations to alleviate corrosion problems in the service water system.
This report is scheduled to be issued by June 15, 1987.
We anticipate submitting our next report no later than July 15, 1987.
Very truly yours, tidb W. G. Counsil
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gy.
e G. S. Keeley o /-
Manager,NuclearL)densing i
I DAR:ef c - Mr. E. H. Johnson, Region IV Mr. D. L. Kelley, RI - Region IV Mr. H. S. Phillips, RI - Region IV
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