Conveying container for fast reactor MOX fuel component

Abstract

The invention relates to a conveying container of a fuel component, in particular to a conveying container for a fast reactor MOX fuel component. The conveying container structurally comprises a cylinder body component, wherein a middle penetrating component used for accommodating the fuel component is arranged in the cylinder body component; a compression end cover is arranged on the end part of the cylinder body component; the cylinder body component comprises an inner cylinder, a middle cylinder and an outer cylinder; the compression end cover is divided into two layers; the first layer of compression end cover is fixedly connected with the inner cylinder of the cylinder body component to form a first layer of containing boundary of radioactive substances; the second layer of compression end cover is fixedly connected with the middle cylinder of the cylinder body component to form a second layer of containing boundary of the radioactive substances; a shielding body and a heat isolating layer are arranged between the middle cylinder and the outer cylinder. The conveying container has better shielding property, containing property, buffering property and heat isolating property; the requirement on transportation of the radioactive substances by regulations can be met; in the whole transportation process, the MOX fuel component can be kept in a subcritical state.

Description

technical field [0001] The invention relates to a transport container for fuel assemblies, in particular to a transport container for fast reactor MOX fuel assemblies. Background technique [0002] Russia is the only country with fast reactors in operation in the world. Only fast reactors in operation can transport and put fuel assemblies into the reactor. Fast reactor fuels include UO2 and MOX. Among them, MOX fuel is more radioactive, and its transportation container The structure needs stronger shielding function, and at the same time, it must pass the "test to verify the ability to transport under normal conditions" and "the test to verify the ability to transport under accidental conditions". Russia's fast reactor MOX fuel assembly transport container has a rectangular cross-section, and the stress state of the cylinder is not as good as that of a circular cylinder. Because the transport container has to withstand a series of severe accident test conditions, the transp...

AI Technical Summary

Problems solved by technology

Because the transport container has to withstand a series of severe accident test conditions, the transport container needs better buffer capacity. In the Russian fast reactor MOX fuel assembly transport container, there is no good buffer device between the fuel assembly and the transport container, and the fuel assembly directly Installed in the bulkhead hole in the barrel of the transport container, which is not conducive to the protection of fuel assemblies

During the falling process of the transport container itself, the outer cylinder and the end need less rigid structural parts to improve the buffer capacity, while the inner cylinder needs better rigidity to reduce the amount of deformation and improve the tolerance. Russia's MOX fuel assembly The outer cylinder and the end of the transport container have no good deformation space, and do not have good cushioning performance

Russia's MOX fuel assembly transport container has no insulation layer and has limited ability to mitigate accidents under fire accident conditions

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