RSS feed source: US Energy Information Administration
In-brief analysis
August 11, 2025
Five countries account for more than two-thirds of the world’s total nuclear electricity generation capacity. The United States has the most capacity, followed by France, China, Russia, and South Korea, based on International Atomic Energy Agency (IAEA) data as of June 2025. Globally, 416 nuclear power reactors are operating in 31 countries, with a total installed net generating capacity of 376 gigawatts (GW).
The development of nuclear power plants for commercial electricity generation began in the United States in the late 1950s with the commissioning of the Shippingport Atomic Power Station in Pennsylvania. Most of the operating U.S. nuclear generating capacity was constructed between 1967 and 1990.
Electric utilities in the United States currently operate 94 nuclear reactors, and the country is the world’s largest producer of nuclear electricity. Domestically, nuclear
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