The US government’s dangerous rush to produce new plutonium pits

As the National Nuclear Security Administration pushes to dramatically accelerate plutonium pit production, it is cutting safety corners, bypassing fiscal oversight, and risking nuclear instability—all to fix a problem that elite scientists say doesn’t exist.

Bulletin, By Dylan Spaulding, Curtis T. Asplund, October 22, 2026

This summer, the National Nuclear Security Administration (NNSA) reversed its initial decision to withhold an unclassified summary of a study on the aging of plutonium in US nuclear weapons by JASON, a group of elite scientists advising the Pentagon. Far from revelatory, the brief JASON study is more notable for its consistency with earlier assessments that found the US stockpile’s plutonium is aging slowly, but not at a level that calls into question present weapons performance.

This latest assessment stands in contrast to the NNSA’s ambitions for accelerating US efforts to revive plutonium pit production—the cores of thermonuclear weapons. Recent developments indicate that the NNSA is pursuing a variety of means to speed up the program and demonstrate ambitious production capabilities. These calls come amid a lack of transparent requirements, before the project has demonstrated mature performance, and without integrated cost and schedule estimates. At the same time, congressional and independent oversight show troubling signs of erosion.

Accelerating a program that was already facing steep challenges comes with immense risks that must be weighed against actual national security needs. Rushing toward production threatens worker and community safety and increases costs. It is also likely to prove strategically destabilizing. The United States doesn’t need to build new warheads to maintain its land-based nuclear force, unless it dangerously seeks to load more warheads into its ballistic missiles.

If plutonium aging is not an imminent threat to the present stockpile—and by extension to US nuclear deterrence—accelerated pit production therefore signals that the United States is dangerously hurtling toward renewed nuclear competition in contravention of its legal obligations as a state party to the Nuclear Non-Proliferation Treaty.

It doesn’t have to be that way: Viable alternatives exist that would reduce strain on the US nuclear complex and reduce the risks and costs of the program itself. These alternatives would be more conducive to future arms control and nonproliferation efforts. But they have only one potentially elusive requirement: Restraint.

When no news is good news. The most recent JASON study on plutonium aging is the group’s third such assessment. In their first 2006 study, they concluded that most pits “have credible minimum lifetimes in excess of 100 years.” Pits in the current stockpile are roughly 37 to 48 years old. An updated summary in 2019 found that “in general, studies on [plutonium] aging and its impacts on the performance of nuclear-weapon primaries have not been sufficiently prioritized over the past decade.” The group then recommended further experimentation to quantify the effect of aging on weapons performance, along with establishing pit production capabilities “as expeditiously as possible.” The latter comment undoubtedly cast a sense of urgency over the issue, especially on Capitol Hill. But it could also be interpreted as a rebuke of Los Alamos National Laboratory’s insufficient investment in the science of plutonium aging and in its lack of commitment to maintaining previously authorized capabilities following the forced closure of Rocky Flats after an FBI raid in 1989. More recently, in 2011, a nuclear near-miss—involving mishandled rods of plutonium for a photo shoot—also resulted in a multi-year shutdown of Los Alamos’s plutonium facility and the resignation of criticality safety officers, raising further concern.

The latest JASON study conducted in 2025—of which only a three-page executive summary was released in August—reaffirms that plutonium is aging slowly, posing no imminent risk to the viability of the existing stockpile. The study repeats the recommendation that pit production capacity be re-established, but it does so without the urgency of the 2019 report. Instead, it makes clear that new production “may be needed to provide options to mitigate any future age-related issues,” noting that the NNSA has faced delays in executing key experiments that will help inform aging effects……………………………………………………………………………………………………………………………………………………………………………………………..

As the recent JASON report shows, the existing US nuclear arsenal is not presently at risk of age-related degradation. The study does not support a requirement to manufacture 80, much less 205 pits per year. Having the capability to produce plutonium pits also does not require that they be deployed in new designs—a move that will only invite international response, increased countermeasures, and encourage an arms race that no one can win. An oversized plan for pit production driven by geopolitical uncertainty rather than technical need may ultimately prove more dangerous and more costly than a restrained approach defined by sound planning. The consequences, like those of running before walking, could be dire.https://thebulletin.org/2026/10/the-us-governments-dangerous-rush-to-produce-new-plutonium-pits/?utm_source=ActiveCampaign&utm_medium=email&utm_content=US%20government%20s%20dangerous%20rush%20to%20produce%20new%20plutonium%20pits&utm_campaign=20261019%20Monday%20Newsletter%20%28Copy%29