Spent fuel transportation and storage container

Abstract

The invention discloses a spent fuel transportation and storage container. The spent fuel transportation and storage container comprises a drum body, an upper inner seal cover, an outer shell, heat-conductive parts, an upper outer seal cover and a lower outer seal cover, wherein the drum body has a hollow structure with an opening; the interior of the drum body is provided with a lead layer; the upper inner seal cover is arranged on the drum body and used for sealing the opening; the outer shell has a hollow tubular structure and sleeves the exterior of the drum body, and an annular cavity isformed between the outer shell and the drum body; the heat-conductive parts are connected with and arranged between the outer shell and the drum body and separates the annular cavity into a pluralityof unit cavities; a neutron absorbing layer is filled in the interior of each unit cavity; each heat-conductive part is formed by overlaying and connection of at least two metal parts with different heat conductivities; the upper outer seal cover seals an upper opening of the outer shell; and the lower outer seal cover seals a lower opening of the outer shell. According to the invention, through dual-layer protection of the drum body and the outer shell, anti-radiation protection of the lead layer and the neutron absorbing layers, and heat-dissipation protection of the heat-conductive parts, the spent fuel transportation and storage container provided by the invention has good shielding effects, is safe and stable, and can be used for transportation and storage.

Description

technical field [0001] The invention relates to a radioactive material transport container, in particular to a spent fuel transport storage container for transporting and storing spent fuel. Background technique [0002] Nuclear power plants rely on the fission reaction of fuel assemblies to generate electricity. After a period of fission reaction, with the consumption of uranium in the fuel rods, the fuel assemblies cannot meet the power requirements of the power station and will be taken out of the core and become spent fuel. The spent fuel is temporarily stored in the spent fuel pool of the nuclear power plant. The capacity of the spent fuel pool is limited. It is necessary to transport the spent fuel out of the nuclear power plant for storage or reprocessing before the capacity of the pool is saturated. However, the subsequent storage or reprocessing site is far away from the nuclear power plant, and the transportation time is also very long. At the same time, affected b...

AI Technical Summary

Problems solved by technology

[0003] With the replacement and upgrading of nuclear fuel, the spent fuel transport containers currently used cannot fully meet the transportation requirements of new high-burnup spent fuel, and the spent fuel transport containers currently used by nuclear power plants are all single-function transport containers, which cannot store spent fuel for a long time. Load high burnup spent fuel assemblies with small load

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