China's nuclear power expansion has played a central role in the global energy landscape over the last decade. The 2025 world nuclear electricity generation total set a new record at 2,845 terawatt-hours, but the details highlight how the entire increase was due to just one nation. In the past year alone, China increased its output by 34 terawatt-hours, and over the last ten years, it contributed 314 terawatt-hours out of the total global gain. This rapid growth has positioned China as the driving force behind the new nuclear record.
The Statistical Review of World Energy confirms the rise, showing a 30 terawatt-hour, or 1.3%, increase in 2025 compared to 2024. However, outside of China, nuclear output remained stagnant or decreased. This pattern highlights the unbalanced nature of global nuclear growth. For example, the 2025 record of 2,845 terawatt-hours is only 1.5% higher than the previous peak set in 2006, even though nearly two decades have passed. Despite this, nuclear power has finally surpassed its old high, though the progress has been slow.
China's Decade-Long Impact
Looking at the decade between 2015 and 2025 provides a clearer perspective on the changes. During that period, global nuclear output increased by 270 terawatt-hours, but 314 terawatt-hours of that came from China. That means, without China's significant contribution, the rest of the world actually produced less. This fact demonstrates how much the global nuclear industry now depends on the development in a single country.
The shift in nuclear power production is most visible in the Asia-Pacific region. Between 2015 and 2025, nuclear output in the region grew from 420 terawatt-hours to nearly 845 terawatt-hours. This more-than-doubling of production has reshaped the global energy map, with China at the center of this transformation. In addition to its own rapid expansion, the region benefits from contributions from Japan and South Korea.
Meanwhile, North America experienced a slight decline, with nuclear generation dropping from 952 terawatt-hours in 2015 to 921 terawatt-hours in 2025. Europe faced a sharper reduction, with output falling from 968 terawatt-hours to 759 terawatt-hours, representing a 22% drop in a decade. These regional differences show how China's rise in nuclear power has influenced the global energy balance.
U.S.
The U.S. Maintains Leadership
The United States remains the world's leading nuclear electricity producer, generating 826 terawatt-hours in 2025. This accounts for 29% of the global total. However, U.S. output has remained nearly unchanged since 2015, when it produced 839 terawatt-hours. In contrast, China's nuclear power generation has grown from 171 terawatt-hours to 485 terawatt-hours over the same period, at an average annual growth rate of almost 11%.
China's rise means the gap between it and the U.S. is narrowing. In 2025, China produced 485 terawatt-hours, or 17.1% of the global total, compared to the U.S. 826 terawatt-hours. If this growth continues, China could overtake the U.S. in nuclear power production within the next five years.
Other Global Nuclear Trends
France and Japan also saw increases, though not as dramatic as China's. Japan, still recovering from the aftermath of the Fukushima disaster, increased its nuclear output to 94 terawatt-hours, but that is far below the 292 terawatt-hours it produced in 2010. France recorded a gain of 9.6 terawatt-hours, bringing its total to 390 terawatt-hours, though this is still lower than its output in 2015.
Growth from countries like Russia, South Korea, and Canada supported the overall numbers. However, these gains were partially offset by declines in other regions. Countries such as the UK, South Korea, and Sweden saw drops in nuclear generation, while Taiwan and Belgium experienced significant reductions. This mix of gains and losses reflects the uneven nature of nuclear power expansion worldwide.
The global nuclear landscape is evolving rapidly. While the U.S. remains the dominant nuclear power, China's rapid expansion is shifting the balance. As the world watches, Asia may become the new center of nuclear growth, potentially redefining the future of clean energy production.
