A UO2 crystal plasticity model [1] has been developed to take into account the thermally activated gliding and the interaction/recovery creep at high temperature. The proposed improvements allow a physically based modelling of a double-kink mechanism for the computation of the thermally activated gliding strain rate. Concerning the interaction/recovery creep, an effective strain rate is introduced in link with the travelling time of dislocations during their interactions with multiplication and dynamic/static recovery mechanisms. The static recovery allows us to make the link with the annihilation of dislocations induced by climbing.