TXX-6576, Interim Deficiency Rept CP-87-20 Re Cracked Porcelain Bus Connectors for 6.9 Kv Transformers.Initially Reported on 870617.Caused by Overtorquing of Connection Hardware. Evaluation Continuing.Next Rept Will Be Submitted by 870828
| ML20235V636 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/17/1987 |
| From: | Counsil W, Keeley G TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-20, TXX-6576, NUDOCS 8707230253 | |
| Download: ML20235V636 (1) | |
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a-M Log # TXX-6576
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File # 10110 d
908.3 r
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Ref. # 10CFR50.55(e) 1ERELECTRIC wmi m c. counsu -
July 17, 1987 Eucative Vwe President U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington,.D.C. ~20555
SUBJECT:
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS. 50-445 AND 50-446 CRACKED PORCELAIN CONNECTORS ON 6.9 KV TRANSFORMERS SDAR: CP-87-20 (INTERIM REPORT)
Gentlemen:
On_ June 17,.-1987, we verbally notified your Mr. S. H. Phillips of a deficiency involving cracking identified in the porcelain bus connectors for 6.9 kV transformers.
Investigation determined the cracks to be due to overtorquing
- of-the connection hardware. This deficiency could possibly result in insulator failure during a seismic event. This is an interim report of a potentially reportable item under the provisions of 10CFR50.55(e).
Our evaluation of this issue is continuing. We expect to submit our next report by August 28, 1987.
Very truly yours, W.'G. Counsi By:
G. S. Keeley
& L Manager, Nuclear Licenyng WJH/wjh c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) 8707230253 870717 PDR ADOCK 05000445 5
$W 4
400 North Olive Street LB 81 Dallas, Texas 75201
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