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Data from the International Atomic Energy Agency revealed that 416 nuclear power reactors with a total installed net generating capacity of 376 gigawatts (GW) were active worldwide in June 2025, according to the U.S. Energy Information Administration. Just five countries currently account for 71% of the world's nuclear generation capacity. Those countries and their total net generating capacity are as follows: the U.S. (97 GW), France (63 GW), China (55 GW), Russia (27 GW), and South Korea (26 GW).
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