Nuclear Fission
One country is building more than six times the reactor capacity of its nearest rival.
74 reactors are under construction worldwide. China alone accounts for 37 of them — roughly 42.9 GW of capacity, more than six times India or Russia, the next-closest countries. The U.S., France, and Canada had zero reactors under construction as of September 2025.
Standings
37 reactors under construction (~42.9 GW) — more than six times the capacity being built in India or Russia. On pace for ~100 GW of installed capacity by around 2030, which would make it the largest nuclear power nation by capacity.
Six reactors under construction — the second-most of any country, though a fraction of China’s total capacity.
One of only two countries (with China) that started new reactor construction in 2025, and completed a new reactor that year alongside China and India.
Key facts
- 74 reactors under construction worldwide as of Feb 2026; China has 37 of them — World Nuclear Association / Statista aggregation
- The U.S., France, and Canada had zero reactors under construction as of Sept 2025 — World Nuclear Report
How this ranking was determined
Ranked directly by reactor count and capacity under construction — the most concrete, least-ambiguous metric of the categories tracked here.