FirstEnergy Corp.’s single-unit, 908 MW Davis-Besse nuclear power plant in Ohio automatically shut down June 29 after workers found a problem with a terminal box that powers one of four reactor coolant pumps, according to the Toledo Blade.
During the trip, a feedwater valve did not respond as expected and was placed in manual control, according to a report with the U.S. Nuclear Regulatory Commission (NRC). All other systems have functioned as designed, according to Power Engineering.
Workers said there was a problem with electrical wiring that connects the box to a motor that runs one of four pumps, the article said. The wiring must be repaired and there is no word on when the reactor is expected to return to service.
FirstEnergy is an energy company headquartered in Akron, Ohio. Its FENOC subsidiary also operates Beaver Valley Power Station in Shippingport, Pa., and Perry Nuclear Power Plant in Perry, Ohio.