The company temporarily shut down the unit 2 of the nuclear plant on 6 February following detection of momentary power interruption at the water level control system.
During the outage, the plant personnel performed additional maintenance activities including replacing four relief valve actuators and other work that cannot be performed while the unit is operating.
Located approximately 60 miles southwest of Chicago, Dresden Generating Station comprises two nuclear energy units that can produce more than 1,900MW at full power, enough to power more than 1.2 million homes.
Unit 1 of the nuclear station was retired in 1978.
US-based power generator Exelon has about 35,000MW of owned capacity comprising clean and low-cost power generation fleets.
