NRC Proposes Scrapping 50-Year-Old Radiation Safety Rule
A radiation safety principle has governed every American nuclear plant since 1975. It could be gone within the year.
The fight over whether that's overdue reform or a dangerous rollback is already underway.
The Nuclear Regulatory Commission proposed Wednesday to eliminate the "As Low As Reasonably Achievable" standard, known as ALARA. It would be replaced with objective, fixed dose limits.
The proposal will be open for public comment for 45 days before a final rule is issued.
What ALARA Actually Requires
ALARA has required nuclear plant operators to keep radiation exposure below legal limits whenever reasonably possible. That's more than just staying under the ceiling.
In practice, operators sometimes had to justify spending millions on additional shielding. This applied even when doses were already well below regulatory limits.
NRC Chairman Ho Nieh framed the change as a clarity measure, not a safety rollback. "This rulemaking is raising the bar on clarity in our regulations," he told reporters. "It is not lowering the bar on our safety standards."
He said the shift to determinate limits would give reactor developers "a very clear picture" of shielding and design requirements upfront. That replaces an open-ended obligation to keep reducing exposure indefinitely.
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Where ALARA Actually Came From
The standard traces back further than most people realize. Its scientific foundation is the Linear No-Threshold model.
That model holds that any radiation dose, however small, carries a proportional cancer risk. There is no safe floor, according to the theory.
The model originated from geneticist Hermann Muller's 1927 experiments on fruit flies. It was formally adopted as US regulatory doctrine through the National Academy of Sciences' 1956 BEAR report.
Critics now call that a Cold War-era decision made under scientific uncertainty, not definitive evidence. The NRC built ALARA on top of the model in 1975.
Today, the NRC's inflation-adjusted dollar value for reducing radiation risk sits at an all-time high. It's roughly $7,100 per rem per person, about two-thirds higher than the agency's 1995 figure.
Industry groups argue that inflated calculation, combined with inconsistent enforcement, has pushed operators into costly modifications. Some of those cuts reduced exposure to levels already lower than a cross-country flight delivers.
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Part of a Much Bigger Push
Wednesday's proposal isn't happening in isolation. It stems directly from Executive Order 14300, which Trump signed in May 2025.
That order was one of four aimed at quadrupling US nuclear capacity to 400 gigawatts by 2050. The country's 94 currently operating commercial reactors generate roughly 100 gigawatts today.
The order explicitly called the Linear No-Threshold model and ALARA "flawed." It directed the NRC to adopt science-based, determinate radiation limits instead.
The Department of Energy moved first. Energy Secretary Chris Wright signed a January memo stripping ALARA from all DOE directives and regulations.
That memo cited a July 2025 Idaho National Laboratory report. The report recommended eliminating ALARA requirements below the standard 5,000 millirem annual worker dose limit.
The DOE change only applies to the department's own reactors and its 11-project Reactor Pilot Program. That program bypasses NRC review entirely and is racing toward a July 4, 2026 criticality deadline.
Wednesday's NRC proposal would extend a similar approach across nearly the entire US commercial nuclear industry.
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The Case Against Eliminating It
Edwin Lyman, director of nuclear power safety at the Union of Concerned Scientists, says the NRC has technically reaffirmed the scientific consensus. No radiation dose is entirely risk-free, he notes — even as the agency moves to weaken the mechanism built around that consensus.
"In eliminating its use of the ALARA principle, the agency's sweeping new proposed rule would allow nuclear facility workers and the general public to be exposed to higher levels of cancer-causing radiation just to save the nuclear industry money," Lyman said. He added the change "will only increase the disease burden at a time when cancer rates are already rising among younger people."
Kathryn Huff, a former DOE official now at the University of Illinois, offered a more measured warning. "ALARA has been the foundation of radiation protection philosophy for 50 years," she said. "Removing it doesn't mean standards disappear, but it changes the optimization framework."
Not every nuclear company is rushing to drop it either. Oklo, the Sam Altman-backed reactor startup, has publicly committed to ALARA-based protection regardless of what the NRC ultimately decides.
The Case For Changing It
Mike Lewandowski, president of the Health Physics Society, argues the current system has become detached from its own risk math. "We don't have scientific certainty," he said of low-dose radiation effects.
He pointed to cases where companies were sent back to redesign plans that already met dose limits. The pursuit of reductions went "far below" any demonstrated benefit, he said. "Every penny of that cost gets shifted to the ratepayer."
Nieh said the NRC isn't being directed by the White House to reach a specific outcome. The agency is simply working within the timeline set by Trump's executive order.
He doesn't expect current operating reactors to make major changes if the rule is finalized. But he said the clearer dose framework should help new reactor designs move through shielding and materials decisions faster.
What Happens Next
The proposal is one of 28 total rule changes the NRC has under consideration in response to the 2025 executive order. The broader package is required to reach final form by November.
A separate NRC proposal on reactor licensing streamlining was also introduced this week. Changes to security standards floated last month have also drawn criticism — the Union of Concerned Scientists says those changes would weaken protections against terrorist attacks on nuclear facilities.
Public comments on the radiation rule are open for 45 days from Wednesday's announcement.
TL;DR
- The NRC proposed eliminating the ALARA radiation protection standard used since 1975
- The change would replace it with objective, fixed dose limits rather than an open-ended reduction requirement
- It stems from a May 2025 Trump executive order aimed at quadrupling US nuclear capacity by 2050
- Critics including the Union of Concerned Scientists warn it could raise cancer risk to save industry costs
- Public comments are open for 45 days before a final rule is issued
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World News Correspondent
Rachel Hayes reports on international affairs, geopolitics, and breaking world news. Based in London, she covers stories shaping the UK and global political landscape.
