According to officials at Southern Nuclear, the NRC was notified at 2:46 a.m. Wednesday of a fire alarm in the Unit 2 reactor’s ventilation panel in an auxiliary building.
“Fire pumps activated and the site’s fire brigade was dispatched,” the company’s summary said. “State and local emergency officials were notified in addition to the NRC. The system operated as designed and employees responded as trained.”
An investigation is under way to determine why the sensor falsely indicated a fire.
The unusual event notice is the lowest of four NRC emergency classifications. The alert was terminated at 3:41 a.m.