Of the 32 countries in which nuclear power plants operate, onlyFrance,Slovakia,UkraineandBelgiumuse them as the source for a majority of the country's electricity supply as of 2021. Other countries have significant amounts of nuclear power generation capacity. By far the largest nuclear electricity producers are theUnited Stateswith 779,186GWhof nuclear electricity in 2023, followed byChinawith 406,484 GWh.[2]As of the end of 2023, 418 reactors with a net capacity of 371,540MWewere operational, and 59 reactors with net capacity of 61,637 MWe were under construction.[11]Of the reactors under construction, 25 reactors with 26,301 MWe were inChinaand 7 reactors with a capacity of 5,398 MWe were inIndia.[12][failed verification]