Fuel storage tank for dry type storage of spent fuel of nuclear power plant

Abstract

The invention discloses a fuel storage tank for dry type storage of spent fuel of a nuclear power plant, which aims at solving the technical problem of higher difficulty in the top cap covering process under water in the existing fuel storage tank structure. The fuel storage tank comprises an opening container, a top cap and a sealing ring, wherein the top cap comprises a shielding cap and an air intake assembly, the shielding cap is matched with an opening of the container, and the air intake assembly is arranged on the shielding cap; a water drainage notch and an annular groove are dug in the shielding cover, and the annular groove is used for placing the sealing ring; the container comprises a bottom plate, a cylinder body, a water drainage assembly, a support structure and hanging lugs, one end part of the cylinder body is in sealed welding with the bottom plate, the water drainage assembly is arranged at the inside wall of the cylinder body, the support structure is used for supporting a fuel basket, and the hanging lugs are used for supporting the shielding cap; when the shielding cap is hung at and covers the other end part of the cylinder body, the air intake assembly is used for providing an air intake passage for the cylinder body, and the water drainage assembly is butted with the water drainage notch, and is used for draining the liquid out of the container. The fuel storage tank has the advantages that the operation difficulty in covering the top cap under water is decreased, and the spent fuel assembly can be reliably loaded and stored.

Description

Technical field [0001] The invention relates to the technical field of dry storage of spent fuel in nuclear power plants, in particular to a fuel storage tank for dry storage of spent fuel in nuclear power plants. Background technique [0002] At present, the mainstream dry storage solution for spent fuel in nuclear power plants is a concrete silo-type storage solution, and its basic containers include fuel storage tanks and concrete silos. Among them, the fuel storage tank is used to load spent fuel components to contain radioactivity. It is generally a steel sealed container filled with a certain pressure of inert gas to provide an inert storage environment for the spent fuel components; the fuel storage tank is placed in a concrete silo, The concrete silo provides the functions of shielding and physical isolation, and passively derives the heat released inside the fuel storage tank. [0003] The main function of the fuel storage tank is to provide sealing, contain radioactive m...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the existing fuel storage tank structure is difficult to cover under water, this application provides a fuel storage tank for dry storage of nuclear power plant spent fuel, which can greatly reduce the water pressure during the top cover. It can also reliably load and store spent fuel assemblies under the operational difficulty

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