How many nuclear reactors are operational globally as of June 2026?

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Global Operational Nuclear Reactors as of June 2026

As of June 9, 2026, there were 415 nuclear reactors operational worldwide, constituting 379.4 GW(e) of nuclear capacity and accounting for 9 percent of global electricity generation. These operational reactors are distributed across 31 countries.
Reactors in Operation and Capacity

The Power Reactor Information System (PRIS) maintained by the International Atomic Energy Agency (IAEA) reported that by June 9, 2026, 415 nuclear reactors were in operation globally. This operational fleet provided a total installed capacity of 379.4 gigawatts of electricity (GW(e)). This significant capacity contributed 9% to the world's electricity supply.
Leading Countries in Nuclear Power

Among the 31 countries operating nuclear reactors, the United States leads with the highest number, possessing 94 reactors. China follows with 60 operational reactors, and France operates 57. These three nations represent a substantial portion of the global nuclear power infrastructure.
Reactors Under Construction

In addition to operational reactors, the IAEA's PRIS data indicated that as of June 9, 2026, 73 nuclear reactors were under construction in 17 countries, with an anticipated capacity of 75.7 GWe. A separate report from Foro Nuclear, as of March 2026, noted 74 reactors under construction. China is also leading in this category with 37 reactors under construction, followed by India with 8 and Russia with 5.

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How many nuclear reactors are operational globally as of June 2026?

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