The U.S. Nuclear Regulatory Commission (NRC) sent two specialized inspectors to Duke Energy (NYSE: DUK)’s Harris nuclear power plant in North Carolina after a quarter-inch flaw was found on the reactor vessel head on May 15, according to Power Engineering.
The single unit, 900 MW nuclear power plant was shut down after further evaluation of ultrasonic data gathered during a 2012 spring refueling outage showed the flaw near a nozzle on the vessel head. There was no evidence of leaking and the flaw did not penetrate the vessel head wall.
The inspection team will develop a timeline, review Duke Energy’s actions leading up to the finding of the flaw, examine previous testing records and evaluate repair plans. On-site inspections are expected to take a week-and-a-half.