The United States has dozens of small modular reactors and microreactors in development, according to tracking data from the Energy Information Administration, even though no such reactor has yet reached commercial operation in the Western world. The pipeline spans utility-scale small modular reactors and smaller microreactors aimed at industrial sites, remote locations, and data center power.

The development data shows a sector clustered around a handful of leading designs. NuScale Power holds full design certification from the Nuclear Regulatory Commission, Kairos Power obtained the first construction permit issued for an advanced reactor, and TerraPower has broken ground on its first advanced reactor in Wyoming. Industry trackers count at least 66 companies across roughly 15 countries actively working on small modular and advanced nuclear technology, with the United States among the most active markets.

Timelines extend across the rest of the decade. Several United States demonstration projects target initial operation around 2030, with fuel supply, specifically the availability of high-assay low-enriched uranium, cited as a constraint that has pushed some schedules later. Corporate and utility offtake agreements, including deals tied to data center and grid demand, have begun to underpin the economics. The data depicts a development phase marked by licensing milestones and early construction rather than commercial output.

Source: U.S. Energy Information Administration -- https://www.eia.gov/todayinenergy/detail.php?id=67584#smr-data