Stakeholder Consensus on Proposed Part 53 Major Topics

The Nuclear Regulatory Commission (NRC) developed a new licensing framework for commercial nuclear reactors, as mandated by the Nuclear Energy Innovation and Modernization Act. The rule should be technology-inclusive, risk-informed, and performance-based and comply with the purpose of NEIMA: to “develop the expertise and regulatory processes necessary to allow innovation and the commercialization of advanced nuclear reactors.”

Over the past several years of development, several topics related to the Part 53 proposed rule have received significant attention from stakeholders, NRC staff, Commissioners, and Congress.

The proposed Part 53 rule was posted to the Federal Register for comment in October 2024. A diverse set of organizations worked together to develop a consensus on recommendations, including non-governmental organizations, government agencies, national laboratories, consultants, technology developers, and industry groups.

There is broad consensus among engaged stakeholders on major topics in the Part 53 proposed rule that the NRC should revise, as detailed in this public comment. This comment does not provide input on every provision in the proposed rule—the most critical regulatory issues where consensus was achieved are prioritized.

The successful deployment of advanced nuclear technologies depends on a regulatory framework that is risk-informed, performance-based, and technology-inclusive. While Part 53 represents an important step toward modernizing reactor licensing, this stakeholder consensus has highlighted areas where improvements are necessary to ensure clarity, efficiency, and effectiveness of implementation.

The NRC should incorporate these recommendations to align Part 53 with NEIMA’s intent, reduce unnecessary regulatory burdens, and provide a clear pathway for innovative nuclear technologies. The Commission should also consider this stakeholder consensus when considering the Part 53 proposed rule and providing direction to the NRC staff on further development. By addressing stakeholder concerns and refining the rule, the NRC can create a regulatory environment that supports the safe, timely, and cost-effective deployment of advanced reactors.