The single-unit, 900 MW nuclear plant was shut off in May 2013 when a crack was found in the reactor vessel head.
Further evaluation of ultrasonic data gathered during a spring 2012 outage showed the flaw, which did not penetrate the vessel head wall. Duke Energy and NRC inspectors said there were no signs of any leaks and the public was never in any danger. Duke then shut down the unit to make repairs, and the NRC sent two inspectors out to the plant.
Duke Energy took control over the North Carolina power plant after its merger with Progress Energy was completed in 2012.
This story was originally published by Power Engineering online. It is republished with permission.