Temperature and Concentration Dependence of Tritium Release Behavior from Solidified LiF-PbF2 Pellet Irradiated by Thermal Neutron

Nobuyoshi SAITO; Kokichi TSUNEKAWA; Ryuzo TAKAGI; Kazutaka KAWAMURA

doi:10.3327/jnst.23.253

Temperature and Concentration Dependence of Tritium Release Behavior from Solidified LiF-PbF₂ Pellet Irradiated by Thermal Neutron

Nobuyoshi SAITO, Kokichi TSUNEKAWA, Ryuzo TAKAGI, Kazutaka KAWAMURA

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Keywords: fusion reactors, blanket materials, tritium, molten salt, lithium fluoride, lead fluoride, irradiation, neutron multiplier, thermal neutron beams, release, diffusion, concentration

JOURNAL FREE ACCESS

1986 Volume 23 Issue 3 Pages 253-257

DOI https://doi.org/10.3327/jnst.23.253

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Abstract

Thin pellets of the LiF-PbF₂ system with no porosity were irradiated by thermal neutron. Then release experiment of tritium produced in the pellets was carried out at some constant temperatures. Thus diffusion coefficients of tritium in the LiF-PbF₂ system were estimated to obtain an activation energy of diffusion, which was found to be 0.51 eV at LiF mole fraction of 0.467. It was also observed that decrease of LiF concentration in the pellet brings increase of diffusion coefficient of tritium.

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