Entergy Arkansas Incorporated's 988-megawatt (MW) Arkansas Nuclear One 02 Steam Turbine (ST) Unit at its Arkansas Nuclear One plant is returning from a refueling outage and running at 43%. This event is expected to end December 1. The 842-MW Arkansas Nuclear One 01 ST Unit went offline yesterday, November 29, as a feedwater pump tripped after causing pressure in the reactor coolant system.