Preparation method and product of net-structured uranium dioxide/molybdenum composite nuclear fuel pellet

The invention discloses a preparation method and a product of a net-structured uranium dioxide/molybdenum composite nuclear fuel pellet, and aims at solving the defects that the thermal conductivity of uranium dioxide and the retention property of a fission product are insufficient when the uranium dioxide is existed as nuclear fuel of a light-water reactor. According to the invention, through themodification treatment on uranium dioxide raw material powder, nearly spherical uranium dioxide microspheres with a large size are obtained; fine molybdenum powder with excellent nuclear performanceis added; a low-energy ball-mill powder mixing method is adopted to change the distribution state of the molybdenum powder in a uranium dioxide matrix; in the process, the fine molybdenum powder is uniformly adhered on the surfaces of the uranium dioxide microspheres to form uranium dioxide microspheres coated with molybdenum powder, and the uranium dioxide remains original size and shape; and finally, a discharge plasma s