China is building nuclear reactors faster than any country on Earth, and the numbers keep getting bigger. According to the National Bureau of Statistics’ year-end communique on economic and social development, the country’s nuclear power capacity reached 125 gigawatts by the close of 2025. On top of that, reports indicate Beijing has greenlit seven more reactor units, further cementing its position as the dominant force in global nuclear construction.
But the headline figure deserves a closer look. The 125 GW number almost certainly bundles together reactors already feeding electricity into the grid, units still under construction, and projects that have been approved on paper but have not broken ground. The distinction matters enormously: as of early 2026, the International Atomic Energy Agency’s Power Reactor Information System lists China with roughly 60 to 65 GW of operating nuclear capacity across about 58 to 60 reactors. The gap between that figure and 125 GW represents billions of dollars in steel, concrete, and engineering work that has yet to produce a single kilowatt-hour.
A building spree with few parallels
China’s nuclear expansion has accelerated sharply since 2022, when the State Council began approving new reactor batches at a pace not seen since the pre-Fukushima era. In 2024 alone, 11 new units received construction approval. Most of the new builds use the domestically designed Hualong One pressurized water reactor, a third-generation design that China has also exported to Pakistan and marketed to countries across the Middle East and Southeast Asia.
The scale of the buildout has already reshaped global rankings. China surpassed France in 2024 to become the world’s second-largest nuclear power producer by electricity generation, trailing only the United States. If current construction timelines hold, China is on track to overtake the U.S. within the next decade.
The seven additional reactors referenced in recent reporting appear to reflect the latest approval batch, though no primary State Council decision notice or regulatory construction permit list has been published in English as of May 2026. Until those documents surface, the specific sites, reactor designs, and commissioning dates for the new units remain unconfirmed.
Why it matters beyond electricity
Beijing is not treating nuclear power as a single-purpose tool. In late 2024, the China Atomic Energy Authority and the National Development and Reform Commission jointly released an action plan to push nuclear technology into medical isotope production, industrial inspection, environmental monitoring, and advanced materials manufacturing. The involvement of both agencies signals that nuclear is being woven into China’s broader industrial policy, not just its power grid.
On the legal front, China’s representative to the IAEA confirmed at a March 2026 Board of Governors meeting that new nuclear energy and safety legislation is entering into force. The diplomatic statement, delivered through China’s mission in Vienna, reaffirmed Beijing’s commitment to peaceful nuclear use and cooperation with international safeguards. The statement did not detail whether the new laws focus primarily on safety oversight, liability, export controls, or waste management, leaving analysts to wait for the full Chinese-language statutes.
The gap between ambition and output
For climate modelers and energy planners, the distinction between operating capacity and pipeline capacity is not academic. Operating nuclear plants displace coal and natural gas around the clock, delivering firm, low-carbon baseload power. A reactor that exists only as an approved project on a planning commission’s desk does none of that. China still generates roughly 60% of its electricity from coal, and every year of delay in bringing a nuclear unit online is a year that coal continues to fill the gap.
There are real-world constraints that could slow the buildout. Global supply chains for reactor-grade steel, large forgings, and enriched uranium are tight. Skilled nuclear construction labor is finite, and quality assurance demands are unforgiving. The CAEA-NDRC action plan’s emphasis on coordinated innovation and industrial upgrading suggests policymakers recognize these bottlenecks, but acknowledging a problem and solving it are different things.
What disaggregated data would reveal
China’s nuclear ambitions are genuine, well-funded, and backed by the highest levels of government. The 125 GW figure is real as an official statistic. But until Beijing publishes a transparent breakdown showing how much of that total is already generating power, how much is under active construction, and how much remains on the drawing board, the number tells an incomplete story. Readers tracking China’s energy transition should watch for disaggregated data from the NBS or the China Nuclear Energy Association, which typically publishes more granular operational statistics, to separate what is running today from what is still a blueprint.
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*This article was researched with the help of AI, with human editors creating the final content.
