The US nuclear fleet remains a quiet workhorse of the power system, according to the Nuclear Energy Institute State of the Nuclear Industry assessment. The country operates 94 commercial reactors across 54 sites, with roughly 97 gigawatts of net generating capacity, and the fleet supplies close to 20 percent of all US electricity.

What distinguishes nuclear is how consistently it runs. The fleet operates at an average capacity factor near 92 percent, among the highest of any electricity source, meaning the reactors generate at or near full output the vast majority of the year. That reliability makes nuclear a steady source of firm, low-emission power that does not vary with weather or time of day.

The industry is now positioned for expansion after decades of flat growth. Federal targets call for raising US nuclear capacity from about 100 gigawatts today toward 400 gigawatts by 2050, supported by reactor uprates, restarts of shuttered plants, and a pipeline of advanced and small modular reactor designs. Demand from data centers and electrification is adding urgency to those plans.

The data underscores a sector that already provides one-fifth of the nation power from a small number of high-performing plants, and that is preparing to grow for the first time in a generation as electricity demand climbs. The combination of high reliability and renewed policy support places nuclear at the center of US grid planning.

Source: Nuclear Energy Institute - https://www.nei.org/news/state-of-the-nuclear-industry-2026