Tritium release from neutron-irradiated fube purged out by Ar-H2 or Ar at controlled temperature

Yuki Edao, Satoshi Fukada, Hidetaka Noguchi, Akio Sagara

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The rate of tritium released from temperaturecontrolled Flibe (a mixed molten salt of 2LiF + BeF2) after neutron irradiation was determined comparatively under two different conditions of Ar-H2 (10%) or Ar gas purge at a constant or linearly elevated temperature. Experimental rates of tritium release were analyzed based on its diffusion in Flibe and isotopic exchange between T atoms on surfaces and H atoms included in gaseous components. Gas released from Flibe had compositions of various ratios of HT to TF depending on the different conditions of Ar-H2 or Ar purge gas. The major molecular species of tritium released from Flibe after neutron irradiation was HT under the condition of the Ar-H2 purge and 300°C The rate of tritium release under the Ar-H2 purge was simulated well by the present analytical model. Although its chemical form immediately after the release was TF under the condition of Ar purge, it was changed to HT partly by interaction with metallic surfaces.

Original languageEnglish
Pages (from-to)140-151
Number of pages12
JournalFusion Science and Technology
Volume55
Issue number2
DOIs
Publication statusPublished - Jan 1 2009

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Materials Science(all)
  • Mechanical Engineering

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