These Countries Are Building The Most Small Modular Nuclear Reactors

The U.S. is leading the world in small modular nuclear reactor (SMR) development with 28 siting announcements, as of 2026.

This graphic, via Visual Capitalist's Cody Good, in partnership with the National Public Utilities Council, shows which countries are building the most SMRs.

The U.S. Leads Global SMR Development

With 28 siting announcements, the U.S. has more SMR projects in development than the next four countries combined.

Source: The Nuclear Energy Agency

Only 78 of 129 SMR designs being tracked by the NEA are publicly reported in the digital dashboard. The rest have either requested not to be included or are not under active development.

Across the U.S., national laboratories lead in siting announcements (7), followed by a three-way tie among utilities, universities, and SMR developers (5 each).

Why Small Modular Reactors Matter

SMRs are a critical clean-energy technology that are cheaper and more flexible than READ MORE AT SOURCE »