TRISO Fuel

The Power of the Particle:
Fueling tomorrow’s reactors

 

What is TRISO Fuel?

TRistructural ISOtropic (TRISO) coated fuels start with a uranium kernel, which is coated with three layers of pyrolytic carbon and one layer of silicon carbide. These coatings encapsulate all product radionuclei under all operating conditions. TRISO particles can be formed into numerous fuel element geometries thus supporting multiple advanced reactor designs and concepts.

TRISO Development Center

X-energy is currently manufacturing uranium oxide/carbide (UCO) based kernels, tristructural isotropic (TRISO) particles, and fuel pebbles at a 5,000-sq. ft. pilot fuel facility located at Oak Ridge National Laboratory (ORNL) as part of the DOE Advanced Reactor Concept 2015 Cooperative Agreement. This DOE Project allows X-energy to move from Pilot toward a FOAK fuel facility that serves advanced reactors with HALEU requirements, TRISO-based fuel forms, and Accident Tolerant Fuel.

X-energy is working to design, finance, and license their TRISO-X Commercial Fuel Fabrication Facility, scheduled to begin commercial-scale fuel production in the 2023-2024 timeframe.

Our mission is to be a U.S. Nuclear Regulatory Commission (NRC) regulated Category II TRISO-based fuel fabrication facility that supports the coming fleet of advanced reactors and helps extend operation of existing light water reactors (LWRs)

Pebble Fuel: Fueling Tomorrow’s Advanced Reactors

  • Carbon and ceramic layers prevent release of radioactivity
  • TRISO particles maintain individual integrity independent of their particles
  • Graphite surrounding the TRISO particles moderates the reaction
  • UCO TRISO coated particles act like pressure vessels to retain fission products

Clean

Complement renewables on hybrid grids

Safe

Meltdown proof / Walkaway safe

Secure

On-site spent fuel storage

Affordable

Less construction time