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Nuclear power plants' net capacity in the U.S. 1975-2019

This statistic shows the net summer capacity of operable units in the United States between 1975 and 2019. In 2019, this figure stood at around 98 terawatts. According to the source, the term net summer capacity describes the steady hourly output that generating equipment is expected to supply to system load - excluding auxiliary power - as demonstrated by test at the time of summer peak demand. Auxiliary power of a typical nuclear power plant is about five percent of gross generation.

Net summer capacity of nuclear power plants in the United States from 1975 to 2019 (in billion kilowatts)*

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Release date

March 2020


United States

Survey time period

1975 to 2019

Supplementary notes

* As of year end.
** Estimated figure
Beginning in 2011, monthly capacity values are estimated in two steps: 1) uprates and derates are added to specific months; and 2) the difference between the resulting year-end capacity and final capacity is allocated to the month of January

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Statistics on "Nuclear power in the U.S."

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