POSTED 18.10.21

EASL - Fatigue risk evaluation of a pressure vessel plug subject to flow induced vibration

The steam generator channel head on a pressurised water reactor forms part of the reactor coolant pressure boundary and is of high nuclear safety duty. Failure of the channel head is considered intolerable. There is the potential for vibration of the drain plug due to coolant flow to result in fatigue induced failure of the channel head drain penetration weld