‘1,000-year source’: China plans to fire up world-first accelerator-driven nuclear reactor

China is poised to activate the world's first megawatt-scale accelerator-driven subcritical reactor, a project led by the Chinese Academy of Sciences (CAS) and state nuclear enterprises. Dubbed the China Initiative Accelerator Driven System (CIADS), this prototype represents a radical shift in nuclear technology, designed not just for power generation but as a '1,000-year' energy solution. The core innovation is its ability to use a particle accelerator to sustain a subcritical nuclear reaction, which allows it to 'burn' nuclear waste as fuel. This addresses two of nuclear power's biggest challenges: fuel efficiency and long-term radioactive waste. The system is projected to go online in Guangdong province in 2027, marking a significant milestone in a field where only experimental projects have existed.

The CIADS reactor is engineered to utilize uranium with 100 times greater efficiency than current light-water reactors. Its most transformative feature is the transmutation of long-lived actinides—the most hazardous components of nuclear waste that remain dangerous for hundreds of thousands of years—into shorter-lived isotopes with a hazard lifespan reduced to less than a thousand years. Deputy director He Yuan of CAS's Institute of Modern Physics calls it the 'internationally recognised ideal approach' for waste treatment and fuel breeding. The installation of its critical superconducting particle accelerators is targeted for completion this year. If successful, this technology could redefine nuclear power as a near-permanent, green energy source, though it remains a prototype with no commercial systems yet operating globally.