Top 10Updated 2026年4月17日
Top 10 Countries by Operating Nuclear Power Plants
This ranking is based on data from the IAEA and global energy agencies as of 2026, counting the number of currently operating nuclear power reactors worldwide. The distribution of nuclear energy reflects national energy independence strategies and the ongoing global transition toward low-carbon power generation.
Current #1
United States
Interesting Facts & Summary
Key Facts and Trends:
- The Leader: The United States remains at the top due to its massive, established nuclear fleet, although its pace of adding new reactors has stabilized.
- Growth Driver: China is currently the primary driver of global nuclear growth, leading the world in both active construction and commissioning speed.
- European Divergence: France maintains the highest share of electricity from nuclear power, while Germany has completely phased out its nuclear program, marking a drastic shift in energy policy.
Nuclear power remains a critical tool for meeting global climate goals, with its role becoming increasingly prominent in future energy portfolios.
| Rank | Country | Operating Units | Key Characteristic |
|---|---|---|---|
United States | 94 | World's largest nuclear fleet | |
China | 58 | Leading in new reactors under construction | |
France | 56 | Nuclear-centric energy structure | |
| 4 | Russia | 36 | Mature technology and active exporter |
| 5 | South Korea | 27 | Highly nuclear-dependent energy policy |
| 6 | Japan | 22 | Phased restarts after Fukushima |
| 7 | Canada | 19 | Primarily uses CANDU reactor technology |
| 8 | India | 18 | Actively developing domestic nuclear tech |
| 9 | Ukraine | 15 | Maintaining operation during wartime |
| 10 | United Kingdom | 9 | Decommissioning and fleet replacement |
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