Effect of nuclear heat caused by the 6Li(n,α)T reaction on tritium containment performance of tritium production module in High-Temperature Gas-Cooled reactor for fusion reactors

Yuki Koga, Hideaki Matsuura, Kazunari Katayama, Teppei Otsuka, Minoru Goto, Shimpei Hamamoto, Etsuo Ishitsuka, Shigeaki Nakagawa, Kenji Tobita, Satoshi Konishi, Ryoji Hiwatari, Youji Someya, Yoshiteru Sakamoto

Research output: Contribution to journalArticlepeer-review

Abstract

Tritium is required for research and development activities for the deuterium–tritium (DT) fusion reactor and fueling the DEMOnstration Power Station (DEMO). However, tritium is a very rare nuclide and must be produced artificially. Tritium production by loading Li compounds (Li rods) into burnable poison holes of a high-temperature gas-cooled reactor (HTGR) has been proposed (H. Matsuura, et al., Nucl. Eng. Des. 243 (2012) 95–101.). Al2O3 and Zr are used to prevent tritium leaks. Nuclear reaction heat caused by the nuclear reaction (e.g., 6Li(n,α)T reaction) can cause a spatial temperature profile in the Li rods and may change its tritium containment performance, because Al2O3 and Zr performance strongly depend on these temperatures. The effect of nuclear reaction heat by the 6Li(n,α)T reaction on the tritium containment performance of the Li rods was evaluated by simulation. The temperatures of the Li rods for the high-temperature engineering test reactor (HTTR) and gas turbine high-temperature reactor 300 (GTHTR300) increased by 36 K and 46 K, and the leaked tritium decreased by 32% and 37% via nuclear reaction heat, respectively.

Original languageEnglish
Article number111584
JournalNuclear Engineering and Design
Volume386
DOIs
Publication statusPublished - 2022 Jan

Keywords

  • Fusion reactor
  • HTGR
  • Nuclear reaction heat
  • Tritium production
  • Tritium production module

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Safety, Risk, Reliability and Quality
  • Waste Management and Disposal
  • Mechanical Engineering

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