"High-Precision Analysis Technology and Engineering Application of Multi-Physics, Multi-Scale, Strongly Coupled High-Temperature Gas-Cooled Reactor" Passes Scientific and Technological Achievement Appraisal, Reaching Internationally Leading Level

On August 7, the China Nuclear Energy Association organized a scientific and technological achievement appraisal meeting in Beijing for the "High-Precision Analysis Technology and Engineering Application of Multi-Physics, Multi-Scale, Strongly Coupled High-Temperature Gas-Cooled Reactor." Ye Qizhen, academician of the Chinese Academy of Engineering, served as the leader of the project review panel. The expert group unanimously agreed to pass the achievement appraisal, recognizing it as reaching an internationally leading level. Xu Weiqiang, General Manager of the Nuclear Energy Research Institute, attended the meeting, and Liu Wei, Director of the Reactor Engineering Institute, delivered a special report.

This achievement was completed through five years of joint research by Huaneng Nuclear Energy Technology Research Institute and Xi'an Jiaotong University, targeting world-class challenges such as strong multi-physics coupling in the core of pebble-bed high-temperature gas-cooled reactors, limited in-core temperature measurement points, and complex bypass flow paths. For the first time internationally, it established an integrated multi-physics analysis system, forming three core technologies. The achievement innovatively proposed a neutron penetration probability conservation method, built a fully coupled fluid-thermal-solid solution framework, and established a quantitative bypass flow characterization system, effectively overcoming multiple industry technical challenges and filling technical gaps in related fields. According to expert appraisal, this achievement achieves independent and controllable core analysis tools for high-temperature gas-cooled reactors, reaching an internationally leading level, consolidating China's technological advantage, and providing important support for energy security, dual-carbon implementation, and industrial promotion of the reactor type.

Currently, this achievement has been successfully applied to the world's first commercially operated Huaneng Shidaowan High-Temperature Gas-Cooled Reactor Demonstration Project. Since 2024, it has continuously supported key work such as dual-reactor operation tracking calculations and fuel reloading scheme optimization, with application results receiving high recognition. This achievement holds complete independent intellectual property rights, with a cumulative total of 21 authorized invention patents, 44 accepted patents, 7 software copyrights, and 24 academic papers published.