Small Modular Reactors and the Big Questions of Cost & Waste - CleanTechnica

The article from CleanTechnica critically examines the claims surrounding Small Modular Reactors (SMRs) as a transformative technology for nuclear energy and decarbonization. While SMRs are promoted as cheaper, safer, faster to build, and easier to finance than traditional large reactors, a recent study published in Progress in Nuclear Energy challenges these assertions. Authored by experts Philseo Kim and Allison Macfarlane, the study analyzes both economic and waste management aspects of SMRs. It finds significant uncertainties and structural challenges, particularly highlighting that SMRs may have higher levelized costs of electricity (LCOE) than anticipated, often exceeding $100 per MWh, due largely to the loss of economies of scale inherent in smaller reactors. Real-world projects, such as NuScale’s canceled flagship plant, underscore these cost overruns. On the waste front, the study reveals even more concerning issues. SMRs could produce two to thirty times more spent fuel per unit of energy compared to conventional reactors, with smaller