On December 20, 2025, the China National Nuclear Corporation (CNNC) announced that Chaotan One, the world’s first commercial supercritical carbon dioxide power generator, began commercial operations. Chaotan One is a joint effort developed by the CNNC and the Nuclear Power Institute of China (NPIC) and is the world’s first commercial 2×15 megawatt (MW) supercritical CO₂ waste-heat…