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Scientists in South Korea recently broke a record in a nuclear fusion experiment. For 48 seconds, they sustained a temperature seven times that of the sun’s core.

But generating commercially viable energy from nuclear fusion still remains more science fiction than reality. Meanwhile, its more reliable sibling, nuclear fission, has been powering our world for many decades.

In this graphic, we visualized the top producers of nuclear energy by their share of the global total, measured in terawatt hours (TWh). Data for this was sourced from the Nuclear Energy Institute, last updated in August 2022.

Which Country Generates the Most Nuclear Energy?

Nuclear energy production in the U.S. is more than twice the amount produced by China (ranked second) and France (ranked third) put together. In total, the U.S. accounts for nearly 30% of global nuclear energy output.

However, nuclear power only accounts for one-fifth of America’s electricity supply. This is in contrast to France, which generates 60% of its electricity from nuclear plants.

Another highlight is how China has rapidly grown its nuclear energy capabilities in the last decade. Between 2016 and 2021, for example, it increased its share of global nuclear energy output from less than 10% to more than 14%, overtaking France for second place.

On the opposite end, the UK’s share has slipped to 2% over the same time period.

Meanwhile, Ukraine has heavily relied on nuclear energy to power its grid. In March 2022, it lost access to its key Zaporizhzhia Nuclear Power Station after Russian forces wrested control of the facility. With six 1,000 MW reactors, the plant is one of the largest in Europe. It is currently not producing any power, and has been the site of recent drone attacks.

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