5 Countries That Produce the Most Nuclear Energy

#1 United States

2021 Nuclear Production, TWh: 771.64

The United States ranks #1 on our list of 18 Countries That Produce the Most Nuclear Energy given its nuclear production of 771.64 TWh in 2021 which is around 20% of the total electricity generated in the country for the year. In terms of generation, the United States produces its nuclear power from 92 nuclear reactors across 53 power plants.

Although the United States has many nuclear reactors, the country isn’t building many new ones given that nuclear reactors can cost $5 billion to $10 billion to build versus wind and solar which is far cheaper and more competitive than grid energy in many places.

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