A new kind of nuclear reactor
The Stellarium is a Fast Breeder Reactor (FBR) and Molten Salt Liquid Core (MLC) reactor based on chloride salts (NaCl) and operates in natural convection. It's a multi-fuel, iso-generator reactor that produces as much fissile material as it consumes. It can be fueled by uranium, plutonium, or thorium depending on the chosen specification.
Choisissez le vôtre
Que votre industrie ait besoin d’électricité, de chaleur, ou des deux, Stellaria vous propose le réacteur adapté.
110MWe
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170MWe
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Électricité
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Biofuel
500 M3
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Chaleur
500 MWth
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Configurations
Notre offre est modulaire et évolutive, voici plusieurs configurations de démarrage selon votre industrie.
Configuration 01
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Configuration 02
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Simulez votre réacteur
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Use cases
E-fuel, fertilizer and hydrogen production
The challenge
The industry needs redundant, flexible electricity that's available 24 hours a day. Gas currently meets high-temperature steam requirements (over 500 degrees). Stringent ATEX requirements demand the highest level of safety in electricity generation. The share of energy in the added value is significant, requiring a stable and low price. Approximately 30% of the consumption can be electrified (motor), and the rest is provided by heat.
Solution
Only a production source that is tolerant of explosive zones and capable of cogenerating high-temperature heat and dispatchable, decarbonized electricity can meet this requirement.
Added value
We supply modules of 180 MWe, some of which generate electricity and others produce steam at 600 degrees. Our underground installation is compatible with Seveso and ATEX plants.
Replacing coal and gas power stations
The challenge
According to scientific studies, air pollution from coal-fired power plants is responsible for thousands of premature deaths every year. In 2024, more than 250 plants were still operating in Europe, often consuming more than 100 tonnes of coal per hour.
Solution
Stellaria transform existing sites into renewable fissile energy production centers for centuries. We are using the same supercritical steam turbines as conventional coal-fired power plants, with similar high temperatures.
Added value
This means you can swap out the burners in coal-fired power plants for Stellarium units while preserving the site and personnel. Over 20 years, you'll save 10 million tonnes of coal. The high flexibility in ramping production up and down also allows for the replacement of gas power plants.
Datacenters power supply
The challenge
According to Accenture and S&P 2022, global datacenter power will grow from 65 GW to 187 GW by 2035, with 29% dedicated to AI. Datacenters are getting bigger to meet the growing demand: up to 1 GW dispatchable and decarbonized per site. These sites must also be near urban areas and Internet/electric hubs.It takes between 5 and 12 years in Europe to get 200 MW of dispatchable power from constrained grid operators.
Solution
To supply datacenters with decarbonised energy, local, modular production is needed to match the growth in server demand. It must also take into account the environmental and social constraints of semi-urban areas , i.e. absolute safety, zero CO2 emissions and minimal water consumption.
Added value
Our highly modular solution, from 100 MWe to 1 GWe, can be adapted as sites grow. It provides datacenters with a definitive, stand-alone solution and feeds into the surrounding power grid.
Why should you choose Stellaria?
1.
For safety
The reactor operates at low pressure using simple, passive physical principles : the molten salt containing the fissile material is set in motion by its own heating and the heat flow extracted by the heat exchangers. It also has four safety barriers; less than 1 mSv is measured at the end.
2.
For competitiveness
Responsiveness and independence are the keys to competitiveness. As flexible as a gas-fired power station and with ultra-dispatchable native power, the Stellarium can be easily integrated as close as possible to the infrastructures it serves.
3.
For sustainability
Stellaria reuses plutonium, as well as uranium and thorium, materials that are abundantly available in France. This ensures low and stable energy prices and the security of energy supply necessary for a sustainable future.
4.
For flexibility
Stellarium adapts to any power, whatever the demand. It is the missing link in balancing electricity grids between large baseload power plants and intermittent energy sources.
On the electrical grid side, installing in high-voltage areas is easy and helps balance peak demand to avoid blackouts. The Stellarium can manage high-power stop-and-go operations associated with industrial processes for electro-intensive industrial customers.