One test in an Oregon State University lab just stripped 90 percent of the radioactivity out of simulated used nuclear fuel. The team built the nuclear fuel reprocessing method around a chemical the industry mostly abandoned decades ago: ammonium fluoride. Here’s what this breakthrough means for the rest of us.
Start with the problem it solves. Nuclear plants produce used fuel that stays dangerously radioactive for thousands of years. Most of it just sits on-site today, sealed in steel and concrete casks. That’s because the standard recycling process, PUREX, is expensive and touchy. Its solvents break down under radiation, so plants dilute everything with huge volumes of liquid to limit the damage. That drives up cost and leaves behind even more waste.
A Chemistry Trick That Skips the Radiation Problem
Alexander Chemey, an assistant professor of nuclear science and engineering at Oregon State, led the team. Instead of pulling plutonium and uranium apart the traditional way, they dissolved simulated used fuel in a concentrated ammonium fluoride solution. Different elements dissolve at different rates in that mixture, so the fission products that make fuel dangerous separate out almost on their own.
“They all have one thing in common: they are very susceptible to radiation damage,” Chemey said of existing reprocessing methods.
Ammonium fluoride barely reacts to radiation, unlike the solvents PUREX depends on. A plant using it might need less liquid and less shielding to run safely. The method also keeps uranium, plutonium, and other actinides bundled together, rather than splitting plutonium out on its own. That makes the leftover material far less useful to anyone building a weapon, a real safety upgrade, not a footnote.
Why This Should Matter to Your Electric Bill and Your Backyard
Picture Denise, a retired schoolteacher who’s lived twenty minutes from a nuclear plant in South Carolina for thirty years. Every year or two, the plant adds another sealed cask of used fuel to its storage pad, because there’s still nowhere permanent for it to go. Projects like Deep Isolation’s borehole disposal work are finally giving some fuel a permanent underground home. Cheaper, safer reprocessing could shrink how much fuel needs one in the first place, meaning fewer casks piling up near people like her.
That has a dollar figure attached. Because the federal government never built a permanent waste site, it has already paid nuclear utilities more than $7 billion, funded by taxpayers, to cover on-site storage costs, and that bill grows every year fuel keeps sitting in casks. A process needing less shielding, liquid, and specialized equipment could shrink that bill over time. Reused fuel also means less fresh uranium to mine and enrich, saving money and time upfront.
The Nuclear Fuel Reprocessing Race Is Just Getting Started
This is proof-of-concept work, published in Communications Chemistry this September, not a running plant. Next up: larger material quantities, then eventually real used fuel instead of a lab stand-in. That’s still years away from anything commercial.
Oregon State isn’t racing alone. A California company called Curio is developing its own used-fuel recycling process, NuCycle, backed by the Department of Energy’s ARPA-E program and aiming for a demonstration facility later this decade, according to Pulse 2.0. It builds on other efforts too, like the AI-assisted cleanup work at Hanford. Between labs, startups, and cleanup crews, used-fuel recycling is starting to look like a real race, not a dead end.
Watch whether this process holds up once it meets fuel that’s actually been through a reactor core, not a simulated batch in a beaker. If it does, the used fuel piling up at plants nationwide might finally have somewhere better to go than a concrete pad.