ENS Event | |
|---|---|
04:00 May 28, 2009 | |
| Title | Part 21 Report - Air Circuit Breaker Deficiency |
| Event Description | The following information was received from Westinghouse via facsimile:
Westinghouse provided information pursuant to the requirements to 10 CFR 21 to report an issue concerning the failure of a Westinghouse DB-100 circuit breaker to close after a new manufacturing cotter pin was installed during refurbishment. Westinghouse has supplied the air circuit breaker at nuclear generating stations. When a DB-100 air circuit breaker failed to close on demand, the air circuit breaker was returned to Westinghouse to investigate the cause of this failure. The air circuit breaker was successfully cycled several times at Westinghouse before the failure to close was repeated. Upon discovery of the DB-100 circuit breaker failing to close, Westinghouse identified plants that have purchased safety related DB-75 and DB-100 circuit breakers and reviewed the configuration of available breakers and drawings. Westinghouse has notified the affected plants which are: R. E. Ginna, Indian Point Unit 2, Point Beach and H. B. Robinson. Westinghouse will be issuing a Nuclear Safety Advisory Letter (NSAL) documenting this issue. |
| Where | |
|---|---|
| Westinghouse Pittsburgh, Pennsylvania (NRC Region 1) | |
| Organization: | Westinghouse Electric |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+6.25 h0.26 days <br />0.0372 weeks <br />0.00856 months <br />) | |
| Opened: | Hank Sepp 10:15 May 28, 2009 |
| NRC Officer: | Vince Klco |
| Last Updated: | May 28, 2009 |
| 45100 - NRC Website
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Westinghouse with 10 CFR 21.21 | |
WEEKMONTHYEARENS 451002009-05-28T04:00:00028 May 2009 04:00:00
[Table view]10 CFR 21.21 Part 21 Report - Air Circuit Breaker Deficiency 2009-05-28T04:00:00 | |