Characterization of the Thermal Conductivities of UO_2 Fuel Pellets with Aligned Molybdenum Metal Particles

摘要

In this study, the thermal conductivities of Mo microcell and microplate UO_2 were characterized and presented enhanced the thermal conductivities of the pellets. Mo metal cell walls and dispersed microplates were aligned working as heat conducting paths in the pellet. Therefore, the thermal conductivity of the UO_2 pellet in radial direction could be enhanced, which can lead to reduce thermal gradient of the pellet when in operation in a reactor. Considering the outstanding fuel pellet characteristics, both of Mo microcell and microplate UO_2 pellets are promising fuel concept of ATF pellets in near future.