US nuclear electricity generation decreased for a second consecutive year in 2021, by 1.5% year over year to 778 million MWh, accounting for 19% of electricity generation, the Energy Information Administration reported.
US nuclear power plants ran at an average 93% capacity last year, which helped offset some power generation losses stemming from the shutdown of Unit 3 of the Indian Point nuclear station in in New York state.
Capacity factors measure how much of the time units operate, and nuclear units tend to be run more of the time than almost all other electricity-generating technologies. The EIA said the US nuclear power fleet has achieved an average annual capacity factor of at least 90% in every year since 2012.
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