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China Claims World-First Thorium Reactor Breakthrough

China’s 2 MW thorium molten salt reactor in the Gobi Desert demonstrates thorium-to-uranium conversion, validating thorium’s potential as a safe, sustainable nuclear fuel source.

  • In April this year, Chinese Academy of Sciences researchers added fresh fuel to a 2 megawatt liquid‑fuelled thorium molten salt reactor in the Gobi Desert, achieving thorium‑to‑uranium conversion six months later.
  • International estimates and local studies indicate China, a national resource holder, has thorium reserves lasting tens of thousands of years, with some local scientists estimating fuel for 60,000 years and Bayan Obo mining district yielding 1 million tons.
  • As a fourth-generation reactor type, molten salt reactors use high-temperature molten salt coolant with water-free, low-pressure operations, while thorium-232 transmutes into uranium-233 for a self-sustaining breeding cycle.
  • China has produced all key reactor components domestically to build an independent supply chain, and the institute aims to complete a 100-megawatt thermal prototype by 2035, researchers say.
  • The breakthrough could reshape the future of clean nuclear energy by enabling safer fission with less waste and no water‑use cooling, strengthening China's thorium molten salt reactor programme in next‑generation nuclear research.
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MIT Technology Review broke the news in Boston, United States on Thursday, May 1, 2025.
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