In 2021, for the second consecutive year, U.S. nuclear electricity generation declined, according to the US Energy Information Administration. Domsetic nuclear power plants’ ouput totaled 778 million megawatthours. 1.5% less than the previous year. Six nuclear generating units with a total capacity of 4,736 megawatts (MW) have retired since the end of 2017. Three more reactors with a combined 3,009 MW of capacity are scheduled to go dark in the coming years. Utilities will need to boost production from other energy sources in order to accommodate the onoing drops.