en.Wedoany.com Reported - On August 10, the international standard ISO 19991:2026, "Fusion Technology — Experimental Magnetic Confinement Fusion Facilities — Supersonic Molecular Beam Injection Fueling Technology for Fusion Devices," led by China, was officially released. Previously, during the final voting process, all 12 countries, including France, Germany, and Russia, cast affirmative votes. This is the first ISO international standard in the field of fusion fueling and the second ISO international standard in the fusion domain led by the Southwestern Institute of Physics (SWIP) under the China National Nuclear Corporation (CNNC).
Supersonic molecular beam injection (SMBI) fueling technology is a key fuel supply technology for controlled nuclear fusion devices. This technology, an original advanced fusion fueling technique developed in China, forms high-speed, directional molecular beams through adiabatic gas expansion. It features high speed, strong directionality, relatively high fueling efficiency, and low particle recycling, significantly enhancing the fuel control capability of fusion devices. It has been applied in more than ten magnetic confinement fusion experimental devices both domestically and internationally.
Under the guidance of the China International Nuclear Fusion Energy Program Execution Center, coordinated and organized by CNNC, led by SWIP in drafting, and supported by the Nuclear Industry Standardization Institute of the CNNC Strategic Planning and Research Institute, the project team successively completed stages including project initiation, working group draft, committee draft, international standard draft, and final international standard draft. Around contents such as system boundaries, key parameters, pressure safety, tritium-related requirements, and inspection methods, multiple rounds of international technical discussions and opinion coordination were organized. After more than two years, an international consensus was ultimately reached and officially released. This achievement embodies the research team's years of continuous deep cultivation and iterative innovation in the field of supersonic molecular beam technology, representing the fruitful result of long-term scientific research and engineering practice.
Technical lead Xiao Guoliang stated that this international standard transforms China's original technology and cross-device application experience into measurable, verifiable, and reusable international technical rules, marking a significant leap for supersonic molecular beam fusion fueling technology from original research and device application to international standardization.
In 2023, ISO 4233:2023, "Reactor Technology — Nuclear Fusion Reactors — Hot Helium Leak Testing Methods for High-Temperature Pressure-Bearing Components of Fusion Reactors," led by SWIP under CNNC, was officially released, becoming the first ISO international standard in the nuclear fusion field. The release of this international standard further demonstrates China's sustained advantages in fusion technology innovation, engineering validation, and international standardization.
The release of this international standard showcases China's active role in nuclear fusion fueling technology and enhances China's voice in the field of international standardization. In the next steps, SWIP will carry out standard promotion and implementation verification, promote the standardized application of supersonic molecular beam technology in relevant fusion devices, and actively participate in the construction of the international fusion standard system, contributing more Chinese technology and Chinese standards to global fusion energy research and development and engineering.
