Tennessee grants Type One Energy first commercial fusion operating license for Bull Run site

On September 2, 2026, Tennessee made nuclear energy history. The Department of Environment and Conservation handed Type One Energy the first commercial fusion machine operating license in the state — cleared for the company’s Bull Run site.

The milestone landed months after the Nuclear Regulatory Commission proposed expanding its regulatory framework to cover the growing range of fusion machine designs under the National Materials Program. That move set the stage for exactly this kind of state-level licensing to happen.

Tennessee issues first commercial fusion license to Type One Energy

The Tennessee Department of Environment and Conservation — TDEC — gave Type One Energy the green light to operate a commercial fusion machine at Bull Run, making it the first commercial fusion operating license ever issued in the state.

Type One Energy’s Bull Run project is now an early test case, and how it proceeds will likely shape how other states handle similar applications down the road.

The timing matters beyond state lines. It’s also the first license of its kind issued after the NRC put forward its proposed rule on an augmented byproduct material framework earlier this year. Tennessee didn’t just make local history — it became the first state to act under the new regulatory conditions the NRC is still working to establish nationally. Type One Energy’s Bull Run site now sits at the center of a regulatory first, having cleared a licensing process that, until very recently, had no clear federal template behind it.

NRC regulatory proposal set the stage for state-level licensing

The NRC published its proposed rule in February 2026, with the stated goal of expanding the augmented byproduct material framework to cover what it described as “the wide variety of anticipated fusion machine designs” across the National Materials Program.

That breadth matters. Fusion technology isn’t one thing — different companies are chasing different machine designs, tokamaks, inertial confinement systems, stellarators, and others — and the regulatory language needed to reflect that diversity. A framework built around a single design would go stale fast as the sector evolves.

The National Materials Program is the mechanism that lets states regulate certain radioactive materials under NRC oversight. It’s a cooperative structure: states take on regulatory responsibility, but within boundaries the NRC defines. When the NRC proposes expanding that framework, it effectively opens the door for states to license activities that weren’t clearly covered before. Tennessee walked through that door before the proposed rule is even finalized.

Implications for the commercial fusion industry

What happened in Tennessee isn’t just a paperwork milestone. It signals that commercial fusion energy in the US is moving from theoretical to procedural — from “when will this be regulated?” to “here’s the license.”

That shift carries real weight. Companies developing fusion machines now have a concrete example of what state-level licensing under the NRC’s evolving framework can actually look like, and Type One Energy’s navigation of the process could become a reference point for other states watching fusion projects take shape within their borders.

If state-level licensing under the National Materials Program becomes a repeatable model, it could accelerate how quickly fusion projects move toward operation. Rather than waiting for a single federal pathway to fully mature, companies may be able to work through state agencies already equipped to handle radioactive materials regulation. Type One Energy’s Bull Run project is now an early test case, and how it proceeds will likely shape how other states handle similar applications down the road.

Background: Fusion regulation and the National Materials Program

Fusion has long occupied an awkward regulatory space. Unlike fission reactors, which carry decades of established NRC oversight, fusion machines don’t produce the same radioactive byproducts or carry the same chain-reaction risks — a distinction that has historically made it unclear how, and under whose authority, they should be licensed.

The National Materials Program lets states regulate certain radioactive materials with NRC oversight rather than direct NRC control. Thirty-nine states currently operate as what the NRC calls “Agreement States,” having signed agreements with the commission to take on that regulatory role. Tennessee is one of them.

For fusion, the core problem has been that the existing framework simply wasn’t written with fusion machines in mind. The NRC’s February 2026 proposed rule attempts to fix that — bringing fusion devices clearly within scope of what states can license, and doing so flexibly enough to cover the range of machine types currently in development. The proposal is still working through the rulemaking process, but Tennessee’s action shows that states aren’t necessarily waiting for the final rule before moving, at least where the proposed framework provides enough clarity to act.

A commercial fusion machine at Bull Run

Here’s what happened: TDEC issued Type One Energy a license to operate a commercial fusion machine at Bull Run — the first in Tennessee’s history and the first issued following the NRC’s February 2026 proposed rule to expand the augmented byproduct material framework under the National Materials Program.

That proposal was designed to create regulatory room for the full range of fusion machine designs anticipated across the industry. Tennessee’s move suggests that room is already being used. Whether other states follow quickly will depend on how their own regulatory agencies read the proposed framework — and how closely they’re watching what unfolds at Bull Run.

Kelly Lippke

Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.