Tritium release from lithium aluminate: can it be improved?

Out-of-pile tritium release study on Li4SiO4 pebbles from TRINPC-I experiments

“…The Li 4 SiO 4 pebbles are usually made by a melting and spraying method [6], whereas the irradiated pebbles provided in this work were made by a freeze-drying method. Previous investigations indicated that tritium release behavior is influenced by many factors, including grain size, pebble densities, impurities, closed porosity etc., all of which will be affected by the preparation conditions of the breeder pebbles [5,6,11,[14][15][16]. Usually, the diffusion speed of tritium in the grain bulk will slow down as the grain size, density and closed porosity of pebbles become larger.…”

Ceramic breeder materials: Status and needs

“…It is important to distinguish the rate-controlling step contributing to tritium release. The rate-controlling step has been obsetved to change from surface phenomena to diffusion as the grain size of the specimen increases and as temperature increases [42][43][44][45][46][47][48]. In order to address tritium release issues, one needs a firmer understanding of the mechanism through which hydrogen enhances tritium release.…”

First-principles study of the effect of dopants (Pd, Ni) on the formation and desorption of T2O from a Li2TiO3 (001) surface

“…17,18 In addition, doping of Mg or Pt in LiAlO 2 , the release of tritium at low temperature by reducing the desorption activation energy of tritium on the surface. 19 Furthermore, it was found that the effect of the catalyst on the isotopic exchange reaction of Li 2 TiO 3 was more pronounced than that of Li 4 SiO 4 . 16 In light of these experimental observations, it is vital to conduct theoretical studies on the effect of metal impurities on the Li 2 TiO 3 surface.…”