The United States operates the largest commercial nuclear power fleet in the world, according to data from the US Energy Information Administration. US utilities run 94 nuclear reactors with a combined net generating capacity of nearly 97 gigawatts, ahead of France with 57 units and 63.0 gigawatts, China with 57 units and 55.3 gigawatts, and Russia with 36 units and 28.6 gigawatts.

Nuclear power accounts for about 19 percent of US power sector electricity generation. The American fleet consists of 54 power plants, each operating between one and four units, spread across the lower 48 states; Alaska and Hawaii have no nuclear plants.

Plant Vogtle in Georgia is the largest nuclear power plant in the country, with four reactors and roughly 4.5 gigawatts of total generating capacity. Vogtle took the top spot after Georgia Power added one reactor in 2023 and another in 2024, each with 1.1 gigawatts of capacity. Before that expansion, the 3.9-gigawatt Palo Verde plant in Arizona held the title of largest US nuclear facility. At the other end of the scale, the R.E. Ginna plant in New York is the smallest, with a single 0.6-gigawatt reactor.

The two new Vogtle units and one reactor at Watts Bar in Tennessee are the only new US nuclear reactors to enter service in recent decades, underscoring how concentrated recent capacity growth has been in the Southeast.

Source: U.S. Energy Information Administration -- https://www.eia.gov/todayinenergy/detail.php?id=65104