A growing pipeline of small modular reactors and microreactors is taking shape across the United States, according to tracking data from the US Energy Information Administration. The designs range from compact microreactors intended for remote sites and industrial users to utility scale small modular reactors meant to plug into the main grid.

The near term milestones cluster in the second half of the decade. The first wave of new build US small modular reactors is expected to reach operation between about 2029 and 2032. Ahead of those deployments, developers are moving through design approvals and construction permits, building the regulatory foundation for a broader rollout.

Individual projects illustrate the pace. Aalo aims to reach first criticality with its test reactor by mid 2026 and to deploy a commercial unit by 2029, while other developers advance toward first firm orders. The staggered timeline reflects the years of licensing, supply chain development, and construction required before advanced reactors contribute meaningful generation.

The push is tied to rising electricity demand and a search for reliable, dispatchable, carbon free supply. Advanced reactors require high assay low enriched uranium, a specialized fuel that the federal government is working to produce domestically. As more designs clear regulatory review and secure customers, the data points to a decade in which advanced nuclear moves from demonstration toward commercial operation across multiple US sites.

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