Tritium release from neutron-irradiated Li2O sintered pellets: isothermal annealing of tritium traps

Tritium release from neutron-irradiated Li2O: Transport in porous sintered pellets

“…specimens (d), which are irradiated by thermal neutrons up to a fluence of 4 × 10 20 n/m 2 , the temperature corresponding to the peak release rate is about 570 K. This suggests that the temperature of the peaks for the irradiated 71-86 T.D. specimens is independent on the porosity and the grain diameter, and the tritium trapped in the irradiation defects is released with recovering the defects by annealing [1].…”

“…The method for conducting the tritium release tests has been described in detail elsewhere [1,12]. Four kinds of specimens were used in tritium release tests: (a) 88% T.D.…”

“…specimens (a) irradiated by thermal neutron up to 2 × 10 23 n/m 2 in the temperature range of 583-665 K. Details of the experimental methods are described in Refs. [1,12]. Fig.…”

“…Therefore, for the 81% T.D. irradiated specimens (d), the rate-determining step of the tritium migration is considered to be annihilation of tritium trapping sites [1]. …”

“…Irradiation defects are considered to significantly affect the tritium release behavior and tritium inventory in the materials. It was indicate that the rate-determining step for tritium release is closely related to the recovery processes of irradiation defects [1].…”