The U.S. Nuclear Regulatory Commission on July 1 published a 339-page proposed rule that would cut industry compliance costs by an estimated $15.1 million to $22.2 million annually — the largest package in a reform push ordered by President Donald Trump's May executive order to overhaul NRC regulations by the end of 2026.

That order also made quadrupling the U.S. commercial nuclear reactor fleet by 2050 official federal policy. Combined with parallel rulemakings already underway, the package places the agency in what one analyst called "the busiest period… since the early days of the nuclear power industry."

What does the proposed rule actually change?

The regulation covers six major areas:

• Design approvals: removes expiration dates from standard design approvals
• Reporting: trims requirements for nonemergency event notifications
• Staffing: loosens reactor control room crew composition rules
• Seismic risk: modifies how plants assess earthquake hazards
• Licensing: lets developers alter designs mid-construction without NRC sign-off
• Environmental review: narrows scope to radiation-related impacts

"This is a wholesale revision of NRC rules and guidance," said Patrick White, an MIT-trained nuclear scientist and group lead in the Clean Air Task Force's nuclear energy practice. The NRC is "trying to look top to bottom and say, 'What changes do we need to make to the regulatory system if we want to accelerate deployment of nuclear?'"

Why does design flexibility matter?

The licensing overhaul targets delays that hit Westinghouse and partners building the first U.S. AP-1000 units at Plant Vogtle in Georgia during the 2010s and early 2020s. Lengthy NRC modification reviews pushed those reactors' delivery dates nearly a decade past original estimates.

Lara Nichols, a former Duke Energy executive now at law firm Troutman Pepper Locke, called the licensing update "one of the most potentially beneficial proposed changes" for developers. A comprehensive rewrite, she added, would let reactor builders avoid the Vogtle pattern.

What happens to the ALARA standard?

The most contested item is the proposed replacement of the agency's 40-plus-year-old "as low as reasonably achievable" (ALARA) radiation protection rule. The NRC's "graded approach" would let plant workers exceed the annual dose limit during outages, provided their five-year average stays below threshold.

NRC estimates the ALARA swap saves the industry $9.53 million annually — small against the multibillion-dollar cost of a single new reactor.

"Impacts of the proposed rule on costs are marginal," said Andrew Kleiman, an energy transition analyst at Wood Mackenzie. Industry-wide savings are "not likely enough to move the needle for any single project."

Could relaxed rules backfire?

White warned that scrapping ALARA, even without measurable safety gains, carries political weight. The change "becomes a major signaling issue," he said, because appearing to loosen radiological commitments could erode public confidence in NRC independence.

A parallel proposal would let license renewal and early site permit applicants seek "categorical exclusions" from full National Environmental Policy Act review. Holland & Knight attorneys Andy Kriha, Jason Hill and Elizabeth Leoty Craddock described the environmental revisions as "potentially transformative" in a July analysis.

Andrew Mauer, senior director of regulatory affairs at the Nuclear Energy Institute, said the trade group "supports efforts to enhance regulatory efficiency by retaining safety-significant requirements, reducing inefficient administrative burdens, and aligning NRC regulations with current practices and Executive Orders."

What decides what happens next?

The proposed rule is open for public comment. With only a handful of reactors under construction in the U.S. and few if any expected online before 2030, the regulatory package will test whether streamlined approvals can attract capital before a possible 2028 administration change reverses course.

"The NRC can be forced to change very, very quickly, but does that mean future administrations could change it in the other direction very quickly?" White asked. Any developer that files now, he added, is betting on rules that may not survive the next White House transition.