[en] The effect of electron irradiation on the creep and evolution of the zirconium nanostructure obtained by the SPD method and previously relaxed by ultrasound is studied. It has been shown that the electron irradiation (with a dose of D = 5∙10¹⁹ cm^-2 and energy E = 10 MeV) does not change the character of the deformed zirconium nanostructure, but initiates the return processes at the grain boundaries and in the border areas, which leads to the softening of the material. The previously relaxation of internal stresses by ultrasound allows one to preserve a sufficiently high level of the strength and plasticity of nanostructured Zr after electron irradiation by reducing the intensity of dynamic recrystallization and activating an additional slip system in the creep process at 670 K. (author)