As you are no doubt aware if you are a regular reader of this blog, there have been quite a number of Event Reports this year where a nuclear reactor lost secondary containment by opening two doors at the same time. Today’s NRC Event Notification page has another containment loss story, this time not involving doors.
Early Sunday morning, workers at the Brunswick nuclear power plant in North Carolina found degraded roof drain piping in the Unit 2 reactor building. According to the Event Report:
Upon further investigation a rusted area 2 foot by 2 inches was found on the pipe. Several through wall holes were found in this rusted area and the remainder of the rusted area was allowing water to weep through.
Secondary containment was declared inoperable, but the reactor continues to operate at 100 per cent power.