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.
