Dominion Virginia Power returned its Unit 2 nuclear reactor at the North Anna power plant in Louisa County back to full power after fixing a leak.
Figures from the U.S. Nuclear Regulatory Commission showed Unit 2 reached 100 percent of operating capacity on Wednesday.
The unit, a large network of tubes that takes water used for steam in the power production process and condenses it back into water, powered down to 84 percent of capacity last Friday after officials found leaks in a water-condensing unit.
Unit 1, the other reactor at North Anna, has remained at full power.
North Anna generates 1,806 megawatts from its two units — enough electricity to power 450,000 homes. Unit 1 began commercial operation in June, 1978 and Unit 2 followed in December 1980.
North Anna is in Louisa County in central Virginia, northwest of Richmond. They named the facility after the North Anna River, which the government dammed to form the 9,600-acre Lake Anna reservoir and the 3,400-acre Waste Heat Treatment Facility, which provides cooling water for the station.