The Reactor Machine

While much of the West debates whether new nuclear power is worth the cost and the wait, China has quietly turned reactor construction into an industrial routine. It has had the world’s largest fleet of reactors under construction for nineteen consecutive years, and the lead is not close.^[4] As of mid-2026 it had roughly 37 reactors building, about 38 gigawatts of capacity, alongside some 64 already operating.^[1]

The pace is deliberate policy. Since 2022 the State Council has approved ten or more new reactors every year, ten in 2022 and 2023, eleven in 2024, ten in 2025, each wave worth on the order of $30 billion.^[2][3] The trajectory points at 110 gigawatts of installed capacity by 2030 and 200 by 2040.^[4]

The United States built the world’s nuclear industry and then stopped growing it. China is about to inherit the title of largest operator without a debate.

The symbolic crossing comes soon. China is projected to surpass the United States, today the world’s largest nuclear operator at around 97 gigawatts, in operating capacity around 2030, ending a lead America has held since the dawn of the atomic age.^[4]

One honest note keeps the scale in proportion. Despite the build-out, nuclear still supplied only about 5% of China’s electricity in 2023, roughly 435 of 9,548 terawatt-hours, a point we take up in a separate reality-check brief.^[1] And fleet counts move month to month, so any single figure should be read with its date.

The read for allocators

China’s nuclear build is the clearest demonstration anywhere of a capability the West has largely lost: constructing large, complex nuclear plants on schedule and at scale, repeatedly. That industrial muscle, standardised designs, serial construction, a complete domestic supply chain, is the asset, more than any single reactor. For investors it frames the sector as an execution story, not a technology gamble: the interesting exposure is the supply chain that makes serial construction possible, and the reactor designs China is now positioned to export. The West is relearning how to build; China never stopped, and is about to be paid the compliment of being the benchmark.