Definition
A small modular reactor (SMR) is an emerging class of nuclear fission reactor with a rated electrical output below 300 megawatts (MWe)—a fraction of a conventional gigawatt-scale plant. The defining idea is modularity: rather than custom-building a massive reactor on site, SMRs are designed to be manufactured in a factory and shipped to the installation site as prefabricated units, with the option to add modules as demand grows.
Why SMRs are discussed for mining and compute
SMRs promise continuous, 24/7 baseload power that, unlike solar or wind, does not depend on weather. That makes them attractive for energy-hungry, always-on loads—data centers, hydrogen production, district heating, and, by extension, large-scale Bitcoin mining and AI compute. A mine co-located with an SMR could absorb the reactor's full output around the clock and flex down when the grid or other customers need power, helping justify the reactor's economics during ramp-up.
Status and caveats
SMRs remain largely pre-commercial. Most designs are still in licensing, demonstration, or early deployment, and questions about cost-per-megawatt, regulatory approval, fuel supply, and timelines are unresolved. For now the SMR-plus-mining pairing is a forward-looking thesis rather than an operating reality, though it fits the broader pattern of co-locating flexible loads with clean baseload generation.
D-Central tracks SMRs as a long-horizon energy option alongside more mature paths. See related entries on geothermal mining and microgrid.
In Simple Terms
A small modular reactor (SMR) is an emerging class of nuclear fission reactor with a rated electrical output below 300 megawatts (MWe)—a fraction of a…