The unit was returned to service on Saturday, Oct. 26, following planned maintenance on the system that cools the unit’s generator. The generator transforms the mechanical energy of the spinning turbine into electrical energy. It is on the non-nuclear side of the plant.

This type of maintenance can only be performed when the unit is not operating.

Dresden Generating Station is approximately 60 miles southwest of Chicago. The station’s two operating units can produce more than 1,800 megawatts net of electricity, enough to power 1.2 million average homes. Dresden Unit 1, which began commercial operation in 1960 and was retired in 1978, has been designated a Nuclear Historic Landmark by the American Nuclear Society.