Key Takeaways
- Type One Energy is advancing a privately‑led fusion power plant design called the Infinity Two stellarator, using the former Bull Run Fossil Plant in Oak Ridge as a testbed.
- The project is backed by Breakthrough Energy Ventures, a fund founded by Bill Gates, and has formed the Infinity Fusion Consortium with AECOM and Tokamak Energy.
- AECOM will contribute engineering and infrastructure expertise, while Tokamak Energy will supply advanced magnet technology and manufacturing know‑how.
- Type One has submitted an early‑stage licensing application to the Tennessee Valley Authority (TVA) for its Oak Ridge work in early 2026.
- Both the U.S. and U.K. governments view commercially viable fusion as essential to meet rising energy demand and are supporting related initiatives.
- The consortium aims to deliver the United Kingdom’s first private fusion plant, positioning East Tennessee as a hub for next‑generation nuclear innovation.
Project Overview and Strategic Goals
On May 9, 2026, Type One Energy announced plans to build what its supporters hope will be the first privately funded fusion power plant in the United Kingdom. The initiative leverages the company’s Infinity Two stellarator fusion design, which Type One intends to adapt and scale through a newly formed partnership. By locating the early‑stage testing at the Tennessee Valley Authority’s (TVA) decommissioned Bull Run Fossil Plant near Knoxville, the firm aims to demonstrate that its stellarator concept can transition from laboratory experiments to a grid‑ready facility. The broader ambition is to close the gap between today’s fusion research and tomorrow’s commercial energy infrastructure, a goal echoed by Type One’s CEO, Chris Mowry.
Infinity Two Stellarator Design
At the heart of the consortium’s effort is Type One Energy’s Infinity Two stellarator, a magnetic confinement concept that twists the plasma‑controlling coils into a complex, three‑dimensional shape. Unlike the more common tokamak approach, stellarators can operate continuously without the need for large plasma currents, potentially reducing disruptive instabilities. Papers published by Type One in 2025 asserted that no fundamental scientific barriers prevent the Infinity Two design from achieving net‑positive energy output, provided engineering challenges related to magnet precision and heat management are solved. The design will serve as the reference model for the U.K. plant, guiding subsequent engineering, manufacturing, and integration work.
AECOM’s Engineering Contribution
AECOM, a global infrastructure consulting firm, joins the Infinity Fusion Consortium to supply the engineering and project‑management expertise required to translate a fusion concept into a functional power plant. According to a Type One press release, AECOM will handle civil works, plant layout, safety analysis, and the integration of fusion subsystems with conventional power‑generation systems such as turbines and heat exchangers. AECOM’s experience with large‑scale energy projects—including nuclear fission facilities and renewable‑energy grids—will help ensure that the stellarator design meets regulatory standards, construction timelines, and budget constraints while maintaining flexibility for future upgrades.
Tokamak Energy’s Magnet and Manufacturing Expertise
Tokamak Energy, an English fusion company renowned for its high‑temperature superconducting (HTS) magnet technology, will contribute its advanced magnet systems and manufacturing capabilities to the consortium. HTS magnets enable stronger magnetic fields at relatively lower power consumption, a critical factor for achieving the plasma pressures needed in a stellarator. Tokamak will also share its know‑how in precision winding, cryogenic cooling, and modular assembly, which are essential for producing the complex, non‑planar coil sets that define the Infinity Two stellarator. By combining Tokamak’s magnet prowess with AECOM’s engineering, the consortium aims to overcome one of the primary technical hurdles that has historically limited stellarator development.
Funding and Support from Breakthrough Energy Ventures
The project has secured financial backing from Breakthrough Energy Ventures (BEV), the climate‑focused investment fund founded by Bill Gates. BEV’s involvement signals confidence that the Infinity Two approach can achieve commercial viability within a realistic timeframe. Beyond capital, BEV provides strategic guidance, access to a network of experts in energy systems, and assistance navigating policy and regulatory landscapes. This support aligns with BEV’s broader mission to accelerate breakthrough technologies capable of delivering gigawatt‑scale, carbon‑free power—a goal that fusion, if realized, could uniquely satisfy.
Utilizing the Bull Run Fossil Plant as a Testbed
Type One has selected the TVA’s former Bull Run Fossil Plant in Oak Ridge as the physical site for early‑stage testing of its fusion systems. The decommissioned coal‑fired facility offers existing grid connections, cooling water infrastructure, and ample space for installing prototype stellarator components and associated diagnostics. By repurposing this brownfield site, the project minimizes new land disturbance and leverages existing utilities, reducing both environmental impact and upfront costs. The Bull Run location also places the effort within East Tennessee’s growing nuclear innovation corridor, fostering collaboration with nearby research institutions and supply‑chain firms.
Licensing Application and Development Timeline
In early 2026, Type One submitted an early‑stage licensing application to the TVA for its Oak Ridge work, marking a formal step toward regulatory approval for fusion‑related activities on the site. The application outlines safety protocols, radiation protection measures, and experimental plans for the Infinity Two stellarator prototype. While full commercial licensing will require additional milestones—such as achieving sustained plasma operation and demonstrating net energy gain—the early application reflects the company’s commitment to transparency and compliance with nuclear regulatory frameworks. Type One anticipates that iterative testing at Bull Run will inform subsequent design refinements ahead of the U.K. plant’s construction.
Government Interest in Fusion Energy
Both the United States and United Kingdom governments have expressed strong interest in accelerating fusion’s path to commercial viability, viewing it as a crucial component of future energy portfolios amid rising electricity demand and climate imperatives. In the U.S., the Department of Energy has increased funding for public‑private fusion partnerships, while the U.K.’s Fusion Strategy outlines ambitions to host a prototype fusion power plant by the 2040s. The Type One‑led consortium aligns with these national objectives, potentially serving as a demonstrator that bridges public research initiatives with private‑sector execution and investment.
Broader Partnerships and East Tennessee’s Nuclear Boom
Beyond the Infinity Fusion Consortium, Type One Energy has cultivated relationships with entities such as Commonwealth Fusion Systems, Pine Island New Energy Partners, and the TVA itself. These collaborations position the company at the forefront of a regional resurgence in nuclear innovation often termed the “East Tennessee nuclear boom.” By focusing on fusion—a technology distinct from the fission‑based reactors dominating today’s nuclear fleet—Type One aims to diversify the area’s energy expertise and attract high‑tech manufacturing, skilled labor, and ancillary services. Success in Oak Ridge could catalyze further investment in fusion‑related supply chains, positioning the region as a hub for next‑generation clean energy.
Outlook and Implications
If the Infinity Fusion Consortium succeeds in delivering a operational stellarator‑based power plant in the United Kingdom, it would represent a landmark achievement: the first privately funded fusion facility to contribute electricity to a national grid. Such a milestone would validate the feasibility of stellarator designs, encourage additional private capital inflow, and accelerate the broader transition toward carbon‑free baseload power. While scientific and engineering challenges remain, the coordinated effort of Type One, AECOM, Tokamak Energy, and Breakthrough Energy Ventures—supported by governmental enthusiasm and a receptive local ecosystem—offers a plausible pathway to turning fusion’s long‑standing promise into a tangible energy resource for the 2030s and beyond.
