Stellaria featured prominently this week with progress on its advanced nuclear roadmap through a new collaboration in France. The company signed a Letter of Intent with the French Alternative Energies and Atomic Energy Commission, or CEA, to conduct a feasibility study for an “ALPHA” nuclear installation at the Cadarache research site.
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The proposed INB ALPHA facility would include a test mock-up, a fast-spectrum molten-salt liquid-fuel demonstration reactor, and a salt fabrication unit to support both prototype and demo operations. A specific zone at Cadarache has already been identified for assessment, signaling early movement on site selection and integration into France’s established nuclear R&D ecosystem.
Stellaria frames this LOI as a key milestone toward “Alvin,” a critical experiment targeted around 2030 that will run on the INB ALPHA platform. Alvin is intended to validate the company’s neutronics and thermohydraulic coupling models, a crucial step for licensing, safety cases, and transitioning from conceptual design to proven reactor performance.
Beyond Alvin, Stellaria’s roadmap references a larger follow-on project called “MegAlvin,” which would build on insights from the initial experiment and mark a longer-term scale-up phase. While these projects are still at the feasibility and planning stages, the collaboration with CEA provides early institutional validation and access to specialized infrastructure that could reduce development risk and capital intensity.
For investors and stakeholders, the INB ALPHA feasibility study and defined experimental pathway may offer greater visibility into Stellaria’s development timeline, even as revenue generation remains long-dated and contingent on successful demonstrations and regulatory approvals. Overall, the week marked a meaningful strategic step for Stellaria as it seeks to strengthen its position in fast-spectrum molten-salt reactor technology and future low-carbon baseload power markets.