High-safety spent fuel storage grillwork

Abstract

The invention belongs to the technical field of spent fuel safety, and particularly relates to a high-safety spent fuel storage grillwork which comprises a plurality of storage grids which are isolated by partition plates (2) and distributed in an array mode, a sleeve (1) used for storing spent fuel assemblies (5) is arranged in each storage grid, the sleeves (1) are perpendicular to the ground, and a plurality of circulation holes (6) are formed in the side walls of the sleeves (1). According to the high-safety spent fuel storage grillwork, gas in the spaces of the storage units (3) and the interlayers (4) flows through the circulation holes (6) in the sleeve (1) to form natural circulation to take away waste heat of the exposed part of the spent fuel assemblies (5); cooling of the spentfuel assembly (5) is guaranteed, a large amount of radioactive release caused by melting down of the spent fuel assembly (5) is avoided, and thus the storage safety of the spent fuel assemblies (5) isguaranteed.

Description

Technical field [0001] The invention belongs to the technical field of spent fuel safety, and particularly relates to a high-safety spent fuel storage grid. Background technique [0002] Spent fuel, also known as irradiated nuclear fuel, is nuclear fuel that has been exposed to radiation and has been used. It is usually produced by nuclear reactors in nuclear power plants. Spent nuclear fuel contains a large amount of radioactive elements, so it is radioactive. If not properly treated, it will seriously affect The environment and the health of people exposed to them. After the accident at the Fukushima nuclear power plant in Japan, the safety of the spent fuel pool has attracted widespread attention from the nuclear power industry at home and abroad. After the spent fuel pool loses its cooling, the waste heat of the spent fuel assembly will cause the water in the spent fuel pool to evaporate and the water level will drop. After the spent fuel assembly is exposed, the water in th...

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Problems solved by technology

[0003]Aiming at the problems existing in the current spent fuel storage grid, that is, when the spent fuel pool loses cooling and exposes the spent fuel assembly, the cooling condition of the exposed part of the spent fuel assembly is sharp Deterioration is not enough to take away the waste heat of the exposed part of the spent fuel assembly, which will eventually lead to the rising and melting of the spent fuel and the release of a large amount of radioactivity. The purpose of the present invention is to provide a high-safety storage rack for spent fuel The exposed part of the fuel assembly can rely on the natural circulation of air to take away the waste heat and ensure the cooling of the spent fuel assembly, thus ensuring the safety of spent fuel storage

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