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A simulation of helium migration along a ring dislocation in uranium dioxide is done. Two sets of He interaction potentials are compared, fundamentally differing in the strength of binding of the atom to uranium ions. Helium diffusion coefficients are obtained at temperatures from 375 to 1000 K. Исследование выполнено при финансовой поддержке РФФИ в рамках научного проекта № 16-52-48008 ИНД_оми.