The "safest fuel
on Earth*"
*According to the U.S. Department of Energy, "Triso Particles: The Most Robust Nuclear Fuel on Earth."
Uranium core
Porous carbon buffer
High-density carbon
Silicon carbide
Triso* Particles
The fuel is made from enriched uranium, packaged in the form of "Triso" particles: a uranium core coated in carbon and ceramic layers (all measuring less than 1 mm in diameter).
These particles are considered to be the "safest fuel in the world."
*Tri-isotopic structural particles
These particles are considered to be the "safest fuel in the world."
*Tri-isotopic structural particles
Graphite compacts
In the core of a Jimmy micro-reactor, the TRISO particles are contained in compacts: a mixture of a graphite matrix and TRISO particles.
Triso particles mixed withthe graphite matrix
Graphite matrix
A fuel cycle that ensures safety and waste management.
Supply
The core of a Jimmy microreactor uses uranium fuel sourced from established Western suppliers.
Enrichment
The uranium must then be enriched to a level of between 10% and 20%. For its first generators, Jimmy has signed a contract with Urenco to carry out this enrichment process.
(Learn more)
(Learn more)
Manufacturing of Triso particles and compacts
The enriched uranium is processed into TRISO fuel particles. In the long term, Jimmy will be able to carry out this process at its industrial platform in Le Creusot. For its first generators, Jimmy will rely on Western suppliers with proven expertise in this process.
Use in the core of
the micro-reactor
the micro-reactor
For a generator with an operational lifespan of 20 to 30 years, refuelling is scheduled every five years.
Control and management
of waste
of waste
Jimmy's generator is designed to ensure that the radioactive waste it produces can be managed cost-effectively through France's existing waste management system. For example, our fuel assemblies are designed to be either disposed of directly in deep geological repositories or reprocessed, depending on government requirements.
Jimmy has also optimised its design to minimise the amount of radioactive waste generated: it would take 200 Jimmy generators to increase France's annual radioactive waste production by just 1%.
Jimmy has also optimised its design to minimise the amount of radioactive waste generated: it would take 200 Jimmy generators to increase France's annual radioactive waste production by just 1%.
