ENS Event | |
|---|---|
04:00 Jun 22, 2023 | |
| Title | Part 21 Interim Report - Failure of Curtiss Wright Supplied Safety Related Relay |
| Event Description | The following is a summary of the Part 21 report provided by Curtiss Wright:
On June 20, 2023, Duke Energy sent a letter to Curtiss Wright (CW) to formally notify them that a Tyco (Agastat) relay had failed. Duke Energy had identified certain contacts that were found sticking in the open position. The relay was returned to CW for evaluation; however, CW could not duplicate the failure. As the relay is questionable for reliable service, CW is having the relay returned to Tyco for their evaluation. Once the evaluation is complete, the current report will be updated. CW anticipates an update to the notification with final results by October 15th. Affected plant: Catawba
The following information was provided by Curtiss Wright via email: The relay was subsequently returned to TYCO for their evaluation. TYCO tested the relay with and without the LL auxiliary switch option and could not duplicate the failure. In all tested conditions, the relay performed within manufacturer specifications, and with no contact binding. As the noted failure could not be reproduced by Curtiss-Wright or TYCO, there is no evidence of part malfunction and thus no further evaluation or notification applies. Notified RDO2 (Miller) and Part 21/50.55 Reactors |
| Where | |
|---|---|
| Curtiss Wright Flow Control Co. Cincinnati, Ohio (NRC Region 3) | |
| Organization: | Curtiss Wright Flow Control Co. |
| Reporting | |
| 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
| Time - Person (Reporting Time:+1353.28 h56.387 days <br />8.055 weeks <br />1.854 months <br />) | |
| Opened: | Tim Franchuk 13:17 Aug 17, 2023 |
| NRC Officer: | Karen Cotton-Gross |
| Last Updated: | Oct 5, 2023 |
| 56683 - NRC Website | |
Curtiss Wright Flow Control Co. with 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component | |
WEEKMONTHYEARENS 568212023-08-30T07:00:00030 August 2023 07:00:00
[Table view]10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 - Inconsistent Potentiometer Resistance Values ENS 566832023-06-22T04:00:00022 June 2023 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 Interim Report - Failure of Curtiss Wright Supplied Safety Related Relay ENS 559602022-04-24T04:00:00024 April 2022 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Part 21 Report - Potential Defect in Quick Disconnect Connector Cable Assemblies ENS 509002015-03-17T04:00:00017 March 2015 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Interim Part 21 Report - Potential Test Induced Defect in a 0867F Main Steam Safety Relief Valves ENS 489962013-05-03T04:00:0003 May 2013 04:00:00 10 CFR 21.21(a)(2), Interim Report for Comply or Defect in Component Interim Part 21 Report of Potential Defect in a Relief Valve Bellows 2023-08-30T07:00:00 | |