ML20247F810
| ML20247F810 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/07/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-89-010, CP-89-10, TXX-89669, NUDOCS 8909180278 | |
| Download: ML20247F810 (2) | |
Text
_
4 i *;. '
g Log # TXX-89669
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File # 10110 C
C CP-89-010-7UELECTRIC' Ref. #
R50.55(e)
September 7, 1989 Executive Vice President U. S. Nuclear. Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHE, PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET HOS. 50-445 AND 50-446
- AUXILIARY FEEDWATER PUMP MOTOR FAN BOLTS SDAR: CP-89-010.(FINAL REPORT)
Gentlemen:
On May '22, 1989. TU Electric notified the NRC via report logged TXX-89286 of a deficiency involving the bolts used to secure the auxiliary feedwater pump.
-motor fans to the rotor.
Specifically, carbon steel bolts were substituted in place of the originally supplied silicon / bronze bolts.
After 'arther evaluation, it has been determined that this condition is not reportable under the provisions of 10CFR50.55(e).
The carbon steel bolts were marked with the standard Grade 5 marking, and testing confirmed them to be Grade 5 as marked.
Westinghouse has. indicated that there would have been no safety concern if Grade 5 carbon steel bolts were used.
Further, Westinghouse stated that there-is no time limit on using the carbon steel bolts, but that they should be replaced with silicon bronze bolts to reduce the potential for electrical arcing. Although arcing and burned paint were identified on the subject motors, correspondence with Westinghouse has determined that the condition that caused the burned paint and arcing would not have affected the safe operation of the motor.
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TXX-89669 September 7,'1989 Page 2 of 2 Based.on the above, it is concluded that this condition does not meet the
. criteria for. deportability under the provisions of 10CFR50.55(e).
Although not required for the ' safe operation.of the plant, the subject bolts have been removed from Trains "A" and "B" Auxiliary Feedwater (AFW) pump. motor fans and have been replaced with silicon / bronze bolts.
Sincerely.
~
6 William J.
ahill, Jr.
JLR/vid c - Mr. R. D. Martin. Region IV Resident Inspectors. CPSES (3)