ENS Event | |
|---|---|
04:00 Mar 18, 2010 | |
| Title | Defect Concerning Failure of Relay to Release When De-Energized |
| Event Description | The following was received via facsimile:
The defect prevents the relay contacts from changing state when required during postulated events. This failure could preclude components from going to their desired accident state upon receipt of an engineered safety features actuation signal. There have been no reports to date of relay contacts failing to properly change state when the relay goes from a deenergized to an energized state. Westinghouse shipped Palo Verde a total of 120 Cutler Hammer Type ARD 660UR DC Relays. Westinghouse Repair, Replacement and Automation Services (RRAS) has been working with Palo Verde and Eaton-Cutler Hammer to identify and correct the cause of these relay failures. POC: J. A. Gresham, Secretary Safety Review Committee Westinghouse Electric Company LLC Nuclear Services P.O. Box 355 Pittsburgh, Pennsylvania 15230-0355 (412) 374-4643 |
| Where | |
|---|---|
| Westinghouse Electric Company Pittsburg, Pennsylvania (NRC Region 1) | |
| Organization: | Westinghouse Electric Company |
| Reporting | |
| 10 CFR 21.21 | |
| Time - Person (Reporting Time:+28.62 h1.193 days <br />0.17 weeks <br />0.0392 months <br />) | |
| Opened: | James A. Gresham 08:37 Mar 19, 2010 |
| NRC Officer: | Dong Park |
| Last Updated: | Mar 19, 2010 |
| 45776 - NRC Website | |
Westinghouse Electric Company with 10 CFR 21.21 | |
WEEKMONTHYEARENS 457762010-03-18T04:00:00018 March 2010 04:00:00
[Table view]10 CFR 21.21 Defect Concerning Failure of Relay to Release When De-Energized ENS 456972010-02-12T05:00:00012 February 2010 05:00:00 10 CFR 21.21 Interim Report Concerning an Issue in Sump Blockage Generic Tests 2010-03-18T04:00:00 | |