The United States has established itself as the global leader in small modular nuclear reactor (SMR) development, with 28 siting announcements as of 2026, according to data from the National Public Utilities Council and the Nuclear Energy Agency. This commanding position puts American projects ahead of the next four closest competitors combined, underscoring the nation's strategic push to expand its nuclear energy infrastructure through next-generation reactor technology.
Small modular reactors represent a significant shift in nuclear energy development, offering potential advantages in scalability, safety, and deployment flexibility compared to traditional large-scale nuclear plants. The concentration of SMR projects in the United States reflects substantial private and public sector investment in the technology, which is widely viewed as critical to meeting long-term energy demands and climate objectives.
While the U.S. holds a substantial lead in announced SMR sites, industry observers note that not all reactor designs achieve widespread transparency. According to the Nuclear Energy Agency, only 78 of 129 SMR designs currently being tracked are publicly reported, suggesting the competitive landscape may be more crowded than publicly visible data indicates.