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The interaction between spherical fuel elements and graphite components in pebble-bed high-temperature gas-cooled reactors (PBHTGR) inevitably leads to the generation of graphite dust. Mechanical wear caused by the movement of graphite components is identified as the primary source of graphite dust. This dust is initially generated in the core region, feed pipes, or discharge pipes. A portion of the dust is carried by helium out of the core into the fuel handling system, subsequently flowing through hot gas ducts, evaporators, and the main helium blower. This study analyzed the temperature, load, and moving distance conditions during graphite component wear in PBHTGRs. By comparing experimental data on fuel element wear rates from existing literature, the annual graphite dust generation in PBHTGRs is conservatively estimated to be 20.52 kg/(year reactor).

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Research on the Assessment Method of Graphite Dust Generation in High-Temperature Gas-Cooled Reactor

  • 会议论文

  • 发表日期：

    2026年

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  • Ruonan Guo,
  • Guofeng Tan,
  • Jin Shi,
  • Zhende Zhou,
  • Songyang Liu,
  • Qin Zhou,
  • Yangcong Dai,
  • Zhu Wang,
  • Yujia Hong,
  • Xingwang Tang,
  • Chao Li,
  • Xuelin Li,
  • Lang Wang,
  • Jinsong Guo,
  • Zuxuan Xu

摘要

The interaction between spherical fuel elements and graphite components in pebble-bed high-temperature gas-cooled reactors (PBHTGR) inevitably leads to the generation of graphite dust. Mechanical wear caused by the movement of graphite components is identified as the primary source of graphite dust. This dust is initially generated in the core region, feed pipes, or discharge pipes. A portion of the dust is carried by helium out of the core into the fuel handling system, subsequently flowing through hot gas ducts, evaporators, and the main helium blower. This study analyzed the temperature, load, and moving distance conditions during graphite component wear in PBHTGRs. By comparing experimental data on fuel element wear rates from existing literature, the annual graphite dust generation in PBHTGRs is conservatively estimated to be 20.52 kg/(year reactor).