Chinese scientists have achieved a significant nuclear breakthrough by successfully refueling a thorium-based reactor while it remains operational, according to reports from Chinese state media.

The experimental 2-megawatt thermal reactor, which came online in June 2024, represents the revival of technology originally developed and abandoned by the United States in the mid-20th century. The milestone was revealed during a closed meeting at the Chinese Academy of Sciences, where project leaders shared results demonstrating the reactor's ability to be refueled without shutdown -- a capability conventional uranium reactors lack.

Though small compared to MIT's 6-megawatt research reactor, this achievement shows China's accelerating nuclear ambitions. The country has surpassed France in nuclear generation and recently approved 10 new reactors worth over $27 billion in investment. This thorium reactor joins other revived nuclear concepts, including molten-salt cooling systems and high-temperature gas reactors, as developers look to the past for solutions to advance nuclear energy's future.

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