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High-temperature gas-cooled reactors (HTGR) represent an advanced nuclear reactor technology. In the primary loop of such reactors, helium serves as the coolant, and the control of helium quality is of paramount importance for ensuring the safety and efficient operation of the reactor. This paper centers on the helium quality control technology within the primary loop of HTGRs, with the objective of guaranteeing the safe and efficient operation of these reactors. The research methodology combines theoretical and practical approaches, comprehensively employing techniques such as literature review, systematical analysis, experimental testing, and verification through actual case studies. It conducts a comprehensive examination of the characteristics of HTGRs and the significance of helium quality, analyzes the factors influencing the helium quality in the primary loop, presents the development history and current mainstream control methods of helium quality control technology, and puts forward the following research achievements: Based on the research of the equivalent diffusion coefficient of moisture in carbonaceous materials, the initial installation heating and dehumidification technology including “vacuum pumping—condensation—adsorption” dehumidification, primary loop anti-condensation, and primary loop non-nuclear parameter elevation is proposed; through the study of the impurity composition in the primary loop, the multi-impurity synchronous purification commissioning technology is developed; by investigating the generation and movement mechanism of graphite dust, the graphite dust online treatment technology is devised; in light of the characteristics of high temperature and minute impurity content of the helium medium in the primary loop, the helium monitoring and analysis technology is optimized. Subsequently, taking the HTGR in Shidao Bay, Shandong Province of Huaneng as an example, the application of the above technologies is elucidated. Finally, by summarizing the research findings, the crucial importance of this technology for the development of HTGRs is underscored. Simultaneously, the future development trend is envisioned, and the key research directions and potential application fields in the future are proposed.

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Research on Helium Quality Control Technology in the Primary Circuit of High-Temperature Gas-Cooled Reactors

  • 会议论文

  • 发表日期：

    2026年

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  • Zhenjiang Li,
  • Guangjian Chen,
  • Yingjie Zhu,
  • Lei Ma,
  • Yijie Yan,
  • Miaomiao Wang,
  • Chongxi Chang,
  • Wenming Yang

摘要

High-temperature gas-cooled reactors (HTGR) represent an advanced nuclear reactor technology. In the primary loop of such reactors, helium serves as the coolant, and the control of helium quality is of paramount importance for ensuring the safety and efficient operation of the reactor. This paper centers on the helium quality control technology within the primary loop of HTGRs, with the objective of guaranteeing the safe and efficient operation of these reactors. The research methodology combines theoretical and practical approaches, comprehensively employing techniques such as literature review, systematical analysis, experimental testing, and verification through actual case studies. It conducts a comprehensive examination of the characteristics of HTGRs and the significance of helium quality, analyzes the factors influencing the helium quality in the primary loop, presents the development history and current mainstream control methods of helium quality control technology, and puts forward the following research achievements: Based on the research of the equivalent diffusion coefficient of moisture in carbonaceous materials, the initial installation heating and dehumidification technology including “vacuum pumping—condensation—adsorption” dehumidification, primary loop anti-condensation, and primary loop non-nuclear parameter elevation is proposed; through the study of the impurity composition in the primary loop, the multi-impurity synchronous purification commissioning technology is developed; by investigating the generation and movement mechanism of graphite dust, the graphite dust online treatment technology is devised; in light of the characteristics of high temperature and minute impurity content of the helium medium in the primary loop, the helium monitoring and analysis technology is optimized. Subsequently, taking the HTGR in Shidao Bay, Shandong Province of Huaneng as an example, the application of the above technologies is elucidated. Finally, by summarizing the research findings, the crucial importance of this technology for the development of HTGRs is underscored. Simultaneously, the future development trend is envisioned, and the key research directions and potential application fields in the future are proposed.