Detrapping behavior of tritium trapped via hot atom chemical process in neutron-irradiated ternary lithium oxides

Release kinetics of tritium generated in lithium-enriched Li2+xTiO3 by thermal neutron irradiation

“…In addition, release temperature of Peak 2 is close to that of annihilation of irradiation defects for Li 2 TiO 3 . It is expected that the irradiation defects would act as tritium trapping sites in lithium ceramics [11]. It is also reported that the annihilation of irradiation defects would trigger the release of tritium from lithium ceramics [12,13].…”

Irradiation effects and hydrogen behavior in H2+ and He+ implanted γ-LiAlO2 single crystals

“…The accumulation of point defects, formation of extended defects and presence of gas species in LiAlO 2 are expected to affect the structural stability, thermomechanical properties, and tritium migration. Previous studies of LiAlO 2 reported in the literature have addressed technical issues of structural defects, volume swelling, micro-cracking, tritium detrapping, diffusion and release using various radiation sources, including x-rays and -rays [4,5], electrons [6,7], neutrons [8][9][10][11][12], and ions [13][14][15]. Modeling of tritium transport [16][17][18] and molecular dynamics (MD) calculations of threshold displacement energies [19], defect production [20,21] and Li diffusion [22] have also been carried out.…”

Dependence of gamma-ray dose on annihilation processes of irradiation defects in Li2TiO3

“…Here, it was reported that the activation energy of oxygen diffusion as 0.41 eV [5], and this value was a little smaller than the defects. If the process 1 was rate-determining process of annihilation behavior for irradiation defects, activation energy of annealing for irradiation defects could be constant.…”

“…3 shows the correlation between the amounts of E -center and O-related defects as a function of annealing temperature. It was reported that the annihilation process of irradiation defects might be attributed to oxygen recovery to E -center via the oxygen diffusion, and to diffusion of trapped electrons which acts as radical scavengers [5]. Moreover, E -center and O-related defects referred as Frenkel pair [11] and it was considered that the annihilation processes of these defects were proceeded by recombination of E -center and O-related defects.…”

“…Especially, from the viewpoint of stable operation of the reactors, it is necessary to study the correlation between the irradiation defects and tritium behavior. In our previous studies, Oyaidzu et al reported that the annihilation of irradiation defects triggered of tritium release at some of lithium ceramics [5,6]. On the other hand, the irradiation defects are generated by two processes.…”