Thermal diffusion of tritium in Nb metal

Masayasu Sugisaki, Kazuya Idemitsu, Satoru Mukai, Hirotaka Furuya

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18 Citations (Scopus)


Thermal diffusion phenomena of tritium in Nb metal are studied for temperatures between 100°-300°C. Some special types of apparatus and samples are developed to determine the distribution of tritium in the transient state of the thermal diffusion. By least squares fitting of the experimental data to the theoretical curve based on irreversible thermodynamics, the heat of transport, Q*, and the diffusion coefficient, D, of tritium at an average temperature of 200°C are determined to be 18.0 kJ/mol and 1.6 x 10-5 cm2/sec, respectively. The importance of the thermal diffusion phenomena is discussed in connection with tritium permeation through the first wall of a nuclear fusion reactor.

Original languageEnglish
Pages (from-to)1493-1497
Number of pages5
JournalJournal of Nuclear Materials
Issue numberC
Publication statusPublished - 1981
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • General Materials Science
  • Nuclear Energy and Engineering


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