ENS Event | |
|---|---|
21:59 Aug 3, 2020 | |
| Title | Part 21 Report - Defect of Masoneilan 8012N-3C Electropneumatic Positioner |
| Event Description | The following was received from the licensee:
On August 3, 2020, Entergy Operations, Inc. (Entergy) completed an evaluation of a deviation at Waterford 3 which concluded the condition constitutes a defect pursuant to 10 CFR 21. The Waterford 3 Site Vice President was notified of the result of this evaluation on August 10, 2020. The Masoneilan 8012N-3C electropneumatic positioner installed on Emergency Feedwater Valve EFW-223A locked during as-found diagnostic testing. Failure analysis concluded that the condition was due to an internal failure of the magnet-coil assembly due to the magnet base had poor solder joints. This has been attributed to a manufacturing defect. Entergy concluded that this condition could affect the ability to properly respond to an Emergency Feedwater Actuation Signal / Main Steam Isolation Signal if present on any of the four air operated Emergency Feedwater to Steam Generator flow control valves; therefore, it could have created a substantial safety hazard. Licensees affected: Waterford. The licensee notified the NRC Resident Inspector. Notified R4DO and the Part 21 group via email. |
| Where | |
|---|---|
| Waterford Steam Electric Station Killona, Louisiana (NRC Region 4) | |
| Organization: | Waterford Steam Electric Station |
| Reporting | |
| 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect | |
| Time - Person (Reporting Time:+163.1 h6.796 days <br />0.971 weeks <br />0.223 months <br />) | |
| Opened: | Maria Zamber 17:05 Aug 10, 2020 |
| NRC Officer: | Thomas Herrity |
| Last Updated: | Aug 10, 2020 |
| 54827 - NRC Website | |
WEEKMONTHYEARENS 548272020-08-03T21:59:0003 August 2020 21:59:00
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