SPENT FUEL STORAGE UNIT AND STACKED SPENT FUEL STORAGE DEVICE

摘要

A spent fuel storage unit (200) and a stacked spent fuel storage device, the spent fuel storage unit (20) comprising a storage module (21), and a plurality of corner posts embedded into a plurality of edges of the storage module (21) respectively. An accommodating cavity (210) is provided inside the storage module (21); the storage module (21) is provided with a front surface and a back surface that face each other. The plurality of corner posts comprise a first corner post (22) corresponding to the front surface of the storage module (21) and a second corner post (23) corresponding to the back surface of the storage module (21). The first corner post (22) is provided with an air intake hole (24) in communication with the accommodating cavity (210), and the back surface of the storage module (21) is provided with an air outlet hole (26) in communication with the accommodating cavity (210). The air intake hole (24), the accommodating cavity (210), and the air outlet hole (26) are sequentially connected to form a heat dissipation channel that allows air to pass through and carries away decay heat from a fuel assembly. By means of the improved design of the spent fuel storage unit (20), stacking arrangement with the spent fuel storage unit (20) as the basic unit is made possible, and meanwhile, each storage unit (20) is able to implement distributed and independent air intake and centralized exhaust, thus enabling multi-level stacked assemblies and dense storage of spent fuel having a high thermal load.