Small modular reactors, or SMRs, have moved from a niche engineering concept to a genuine investment category over the past several years. Unlike traditional nuclear plants, which are built on-site over many years, SMRs are designed to be manufactured largely in a factory and shipped to their final location.
That manufacturing approach is the core pitch: smaller, standardized units should in theory be cheaper and faster to build than a single large custom reactor, and easier to site incrementally as demand grows.
Skeptics note that the technology remains largely unproven at commercial scale, with most projects still in the permitting or early construction phase. Cost estimates have also crept upward as early projects have moved from paper to construction, echoing a pattern seen in traditional nuclear builds.
Proponents counter that even a modest cost premium may be worth it for utilities seeking a reliable, always-on power source to pair with intermittent renewables — a role SMRs are increasingly being positioned to fill.