Last Wednesday, the Nuclear Regulatory Commission received a Preliminary Notification concerning a mid-November scram at the Brunswick nuclear power plant in North Carolina. On November 16, operators scrammed the Unit 2 reactor from 7 per cent power due to a coolant leak. Brunswick declared a Notice of Unusual Event (NOUE) during the incident.
The Preliminary Notification said that an investigation of the event “determined that the unidentified leakage was the result of inadequate reactor reactor vessel head stud tensioning due to human performance issues dr]uring reactor vessel head assembly.
Brunswick is in the process of restarting Unit 2, and the NRC is monitoring activities at the site.