Nuclear power plants undergo both planned outages, usually for maintenance and refueling, and unplanned outages, which include weather-related disruptions and early retirements.
June capacity outages averaged 6.1 GW per day and peaked at 8.3 GW. Nuclear capacity outages peaked in June because some reactors were still offline at the end of the spring refueling and maintenance season. Capacity outages this past summer exceeded those in summer 2022 by more than 25%. nuclear generating capacity averaged 3.1 gigawatts (GW) per day during the summer of 2023 (June 1 through August 31), a return to 2021 levels.
Energy Information Administration, Status of U.S.
