Renaissance Fusion

Renaissance Fusion, headquartered in Grenoble, is continental Europe's first stellarator company. It uses HTS sheets laser-etched into custom coil shapes and liquid-lithium curtain walls to absorb plasma heat and breed tritium — a fundamentally different stellarator manufacturing and blanket approach.

Manufacturable modular stellarator architecture lets a European industrial supply chain build fusion plants without a sovereign tokamak megaproject.

Global electricity demand is entering an unprecedented growth phase driven by AI infrastructure, data centers, transport electrification, industrial decarbonization, water desalination, and advanced manufacturing. Solar suffers intermittency, wind capacity-factor variability, natural gas carbon emissions, conventional nuclear cost and deployment speed, and batteries energy-density and duration limits. The world requires a new source of clean, dispatchable baseload energy. Fusion represents the ultimate energy source — the challenge is making it commercially practical.

Two innovations: laser-patterned HTS sheets replace winding bespoke 3D coils, and a flowing lithium curtain replaces solid first-wall components. Both target the manufacturability bottleneck.

Deuterium-tritium fusion releases ~80% of its energy as 14.1 MeV neutrons, which deposit their kinetic energy in a surrounding blanket. The heat drives a conventional steam (Rankine) or supercritical-CO₂ (Brayton) turbine.

The most thoroughly understood fusion fuel cycle, highest cross-section at achievable temperatures, and proven back-end engineering (steam turbines are 19th-century technology). Trade-offs: neutron-induced materials damage, tritium handling, ~33–40% Carnot-limited efficiency.

Modular manufacturing across the European industrial base eliminates the megaproject premium that has burdened previous fusion programmes.

Stellarator fusion plants built by Europe's industrial supply chain.

Make stellarators manufacturable.

• Laser-patterned HTS coil yield
• Liquid-lithium wall flow stability in magnetic field (MHD drag)

1. 2023

   €16M seed extension