France’s Nuclear Reactor Maintains 90 Million°F Plasma for a Record-Breaking 22 Minutes, 17 Seconds — A Major Fusion Milestone France has achieved a historic breakthrough in nuclear fusion research by sustaining plasma at nearly 90 million°F (50 million°C) for an unprecedented 22 minutes and 17 seconds. The achievement was recorded at the WEST Tokamak, operated by the French Alternative Energies and Atomic Energy Commission (CEA), marking a critical step toward practical fusion energy. Fusion re