NRC Finalizes New Licensing Framework for Advanced Nuclear Reactors

• •NRC finalized 10 CFR Part 53 for advanced nuclear reactor licensing on March 25, 2026.
• •The new framework is risk-informed, technology-inclusive, and offers a flexible licensing pathway.
• •Probabilistic risk assessment (PRA) is central to the new regulatory approach.

On March 25, 2026, the Nuclear Regulatory Commission (NRC) finalized the rule for 10 CFR Part 53, establishing a risk-informed, technology-inclusive regulatory framework for commercial nuclear reactors. This new framework offers a voluntary, flexible licensing pathway for both new and existing reactor technologies, diverging from the more prescriptive Parts 50 and 52. The rule aims to facilitate the licensing of advanced reactor designs, including non-light-water reactors and small modular reactors, while maintaining safety standards. The NRC's efforts were influenced by the Nuclear Energy Innovation and Modernization Act (NEIMA) and Executive Order 14300, which directed a comprehensive review of regulatory practices. The new framework emphasizes probabilistic risk assessment (PRA) as central to safety and security planning, marking a significant shift in regulatory approach. The NRC's decision reflects a long-term commitment to modernizing nuclear regulation to accommodate diverse technologies and deployment scenarios. The implementation of Part 53 is expected to streamline the licensing process and encourage innovation in the nuclear sector.