Nuclear Power Capacity by Country (2025)
Ekim 2025
The Big Five Dominate Global Capacity
Five countries account for 71% of global nuclear capacity.
The United States tops the list with 97 GW across 94 reactors. France ranks
second at 63 GW, a result of its historic policy to standardize and scale
nuclear after the 1970s oil shocks. China follows at 55 GW. Russia (27 GW) and
South Korea (26 GW) round out the top five.
|
Country |
Net Capacity (GW) |
Number of Reactors |
|
United States |
97 |
94 |
|
France |
63 |
57 |
|
China |
55 |
57 |
|
Russia |
27 |
36 |
|
South Korea |
26 |
26 |
|
Ukraine |
13 |
15 |
|
Canada |
13 |
17 |
|
Japan |
13 |
14 |
|
India |
8 |
21 |
|
Spain |
7 |
7 |
|
Sweden |
7 |
6 |
|
United Kingdom |
6 |
9 |
|
United Arab Emirates |
5 |
4 |
|
Finland |
4 |
5 |
|
Czech Republic |
4 |
6 |
|
Belgium |
4 |
4 |
|
Pakistan |
3 |
6 |
|
Switzerland |
3 |
4 |
|
Rest of World |
18 |
28 |
Reactor Count vs. Reactor Scale
France and China both operate 57 reactors, yet France’s capacity is higher
at 63 GW versus China’s 55 GW. The gap points to average reactor size, capacity
uprates, and fleet composition. France’s standardized designs and efficiency
upgrades push more net output per unit. China’s fleet includes a mix of older
and newer designs, with several units commissioned in the past decade.
However, as China ramps larger Gen III+ reactors, this capacity
differential could narrow quickly. Currently, nearly half of
the world’s nuclear power under construction is located in China.
Emerging Players
Emerging players are also reshaping the nuclear map: the United Arab
Emirates has reached 5 GW with just four reactors, while Finland and the U.K.
maintain smaller but strategic fleets. Similarly, India has steadily expanded
its nuclear capacity over recent decades, operating 21 reactors with a combined
net capacity of 9 GW.
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