The Jimmy generator
Jimmy's thermal generators are based on high-temperature nuclear micro-reactors (HTR) that produce decarbonized heat. This technology has been known since the 1960s. It is proven and renowned for its ability to provide heat and for its high safety standards.
The features
- 25m x 25m x 25m
- Required land area: ~2500 m²
- Up to 500°C
- Thermal power: 10, 15, or 20 MW
- Greenhouse gases avoided: up to 40,000 tons of CO2 equivalent per year (vs. gas)
- 20 years
- One or two reloading operations over the lifespan
(many defense-related confidential information)
-The generator is located in a enclosed area, with access through a security gate, monitored 24/7
-The generator's building is made of reinforced concrete
Operation of the generator
The primary circuit extracts heat from the core of the micro-reactor and cools it through the circulation of pressurized helium.
It is a high-temperature micro-reactor (HTR), cooled by a helium heat transfer fluid and moderated by graphite. Heat is generated inside this micro-reactor through the nuclear fission reaction.
They are inserted above the core of the micro-reactor and can be inserted to control its reactivity. They act as the brake and accelerator of the micro-reactor.
The heat exchanger transfers heat to a secondary circuit. It ensures perfect sealing between the two circuits.
The secondary circuit uses CO2 and allows connection to the industrial heat circuit. A cold loop originates from the industrial site, then is heated by the CO2 circuit to a temperature of up to 450°C.
Intrinsic safety
Thanks to fundamental properties that allow the generators to withstand any internal or external disruption:
Graphite acts as a moderator and enables the storage and passive removal of residual heat in the event of the micro-reactor shutdown.
The Triso particles, which make up the fuel of the micro-reactor, contain 99.9% of the fission products, even in the event of an accident.
Any significant increase in temperature "smothers" the micro-reactor.
The legacy of HTR reactors
Decades of feedback and experience.
