Which Countries Are Building The Most Nuclear Reactors?

When it comes to nuclear construction sites worldwide, Iran has been under the most scrutiny over the past decade. However, for the sheer multitude of nuclear reactors under construction, nowhere can compete with China. 24 of them were under construction there as of July 01 2015 while a further 27 were operational. Russia is in second place with 8 reactors being built while India rounds off the top three with 6. The US has 5 nuclear plants under construction with 99 operational. According to the World Nuclear Industry Status Report 2015, there are 62 active building sites globally, the highest number since 1990.

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This chart shows nuclear reactors under construction and operational worldwide as of 1 July 2015

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Number of nuclear reactors under construction worldwide as of September 2026, by region
Number of nuclear reactors in operation and under construction worldwide as of January 2017, by country*
Number of nuclear reactors under construction worldwide as of September 2026, by country
Number of planned nuclear power reactors worldwide as of September 2026, by country
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Electric capacity of nuclear reactors under construction worldwide in June 2025, by country (in megawatts)
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Number of nuclear reactor construction starts worldwide from 1954 to 2024

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