NRC proposes radiation rules rewrite, keeps dose limits unchanged

The U.S. Nuclear Regulatory Commission proposed a major rewrite of its radiation-protection rules on July 1 while keeping public and worker dose limits unchanged. The proposal would replace the long-standing ALARA framework with clearer, more objective compliance requirements, a change that would touch nuclear plants, fuel-cycle facilities, hospitals, universities and industrial users of radioactive material.

The proposal would update 10 CFR Part 20, the main radiation-protection rule, alongside Part 50, which governs reactor licensing and includes Appendix I’s ALARA-related numerical design objectives for reactor effluents. Part 35, which covers medical use of byproduct material, would also be affected. The rewrite is meant to reduce unnecessary regulatory burden and bring the rules in line with current science and decades of operating experience, while shifting the system toward a more risk-informed and performance-based approach. That would give licensees more flexibility in how they evaluate exposures, manage occupational radiation and use modern dose-assessment methods.

Chairman Ho K. Nieh framed the move as a tightening of the rulebook, not a loosening of safety. “We’re raising the standard for regulatory clarity, not lowering the standard for safety,” he said. The proposal is part of a broader modernization push tied to executive orders and the ADVANCE Act, and it will take public comments for 45 days after publication in the Federal Register. The agency plans a public meeting during that comment period.

The agency last extensively revised Part 20 in 1991 after a 12-year rulemaking process, and those revisions took effect in 1994. In March, the agency was considering 28 rules in response to an executive order on reforming the commission, with final rules expected later in 2026.

Under the proposal, caregivers of patients receiving radioactive-material treatments could voluntarily accept higher doses, while preserving protections. Edwin Lyman of the Union of Concerned Scientists said ALARA has served as a conservative safeguard because low-dose risk is hard to measure precisely.