Preparation method of nuclear fuel pellet including thermal conductive metal and the nuclear fuel pellet thereby

摘要

The present invention relates to a method of manufacturing a nuclear fuel sintered body including a thermally conductive metal and a nuclear fuel sintered body manufactured thereby, and more particularly to a method of manufacturing an oxide fuel granule having a TD (theoretical density) of 30 to 45% One); Mixing the oxide fuel particles produced in step 1 with the thermally conductive metal powder (step 2); The step (step 3) of forming a shaped body by molding the oxide fuel granules in which the thermally conductive metal powder is mixed in the step 2; And a step of sintering the shaped body of step 3 (step 4). The present invention also provides a method of manufacturing a nuclear fuel sintered body including the thermally conductive metal mesh. Since the method for manufacturing a nuclear fuel sintered body including a thermally conductive metal according to the present invention uses a thermally conductive metal rather than a metal oxide directly, sintering can be performed in the same reducing gas atmosphere as a conventional sintering process, And has an excellent compatibility with commercial manufacturing processes. Further, since there is no oxide liquid phase formation and reduction step, the distribution homogeneity of the metal material in the sintered body is excellent, and thus, a sintered fuel body in which metal nets and microstructures are uniformly distributed from the inside to the outside of the sintered body can be manufactured.