Induced radioactivity of commercial isotropic graphites for high heat flux tiles

T. Shikama, H. Kayano, M. Fujitsuka, T. Tanabe

研究成果: Article査読

3 被引用数 (Scopus)

抄録

It used as the plasma-facing material in the next-generation fusion devices, graphite will induce radioactivity in impurities in the graphite. This study was carried out to evaluate the amount of radiologically significant impurities in commercial isotropic graphite tiles. Special attention is given to the benefits of purification by halogen treatment. Graphite tiles from seven Japanese companies were irradiated in JMTR to neutron fluences up to 7.7 × 1024 n/m2 fast (E > 0.1 MeV) and 1 × 1025 n/m2 thermal (E < 0.683 eV) at about 450 K. Subsequent γ-ray spectroscopy revealed that major impurities contributing to the induced radioactivity are the IIId, IVa, Va elements and rare earth elements. The origins of these impurities are suggested and the effects of halogen treatment on the reduction of these impurities are analyzed.

本文言語English
ページ(範囲)209-213
ページ数5
ジャーナルJournal of Nuclear Materials
179-181
PART 1
DOI
出版ステータスPublished - 1991
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 材料科学(全般)
  • 原子力エネルギーおよび原子力工学

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