Transfer container for dry storage of nuclear power plant spent fuel

Abstract

The invention discloses a transfer container for dry storage of nuclear powder plant spent fuel. The transfer container comprises a barrel body, a top cover arranged on the upper end face of the barrel body and a bottom cover arranged on the lower end face of the barrel body. The top cover and the barrel body are detachably and fixedly connected. The wall of the barrel body is of a hollow interlayer structure and comprises an inner barrel wall, an outer barrel wall and an inner cavity defined by the inner barrel wall and the outer barrel wall. The inner cavity is filled with a lead layer and a boron-containing resin plate layer. A middle shell wall is arranged between the lead layer and the boron-containing resin plate layer for partition. A waveform heat transfer plate is arranged in the boron-containing resin plate layer and makes face contact with the outer barrel wall and the middle shell wall. Compared with the prior art, the transfer container for dry storage of nuclear powder plant spent fuel has a reliable neutron shield function and excellent heat conducting property, can provide structural protection and radiation shield for a fuel storage pot when fuel is loaded in the fuel storage pot and can achieve the transfer function from the fuel storage pot to a concrete storage container.

Description

technical field [0001] The invention belongs to the field of nuclear power plant spent fuel dry storage, and more specifically, the invention relates to a transfer container for nuclear power plant spent fuel dry storage. Background technique [0002] After the spent fuel is unloaded from the reactor core of the nuclear power plant, it needs to be stored in the supporting storage pool in the nuclear power plant. Dry storage can only be carried out when the radioactivity and decay heat of the spent fuel are reduced to allowable conditions. During dry storage, spent fuel assemblies first need to be loaded into fuel storage tanks, which are generally of thin-walled structure, so it is necessary to load the fuel storage tank into a transfer container with a shielding function for loading spent fuel After the spent fuel assembly is loaded, the fuel storage tank is welded and sealed, and is transferred to the storage site along with the transfer container, and then the fuel storag...

AI Technical Summary

Problems solved by technology

However, this design will lead to lower overall strength of the transfer container, and, in case of accidents such as overturning or falling of the transfer container, the water jacket may be damaged, resulting in partial failure of the shielding function of the transfer container

In addition, due to the low thermal conductivity of water, the water layer in the water jacket cannot form effective natural convection, so its thermal conductivity is also weak.

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