Understanding the behavior of tritium release from ceramic breeder materials is important for the design of solid breeding blanket and tritium recovery system in a fusion reactor.In this study,the kinetics of tritium release process in neutron-irradiated Li4SiO4 ceramic pebbles was analyzed by diffusion,first and second order desorption models.In the isothermal annealing experiment at 600℃ under He+0.1%H2 purge gas,the tritium release rate could be reproduced well only by first order desorption model.The desorption activation energy was estimated to be~196 kJ/mol.