Casting type hollow cylindrical radiation shielding device

Abstract

The invention relates to the technical field of nuclear facility radiation protection, and concretely relates to a casting type hollow cylindrical radiation shielding device. In order to effectively solve the problem of hot spot shielding at a vertical radioactive plug and a blind plate of a nuclear power plant, better apply radiation shielding measures, and start from the radiation protection optimization management requirement of the power plant, it is necessary to design and manufacture a special radiation shielding device which meets the radiation protection requirement in the aspect of shielding performance, has high safety and convenience, and can obviously reduce the radiation dose of shielding operators. Left side shielding modules and right side shielding modules in the device are both semi-cylinders and are connected through front and rear lock catches to form a sleeve; and the left side shielding modules and the right side shielding modules are the same in height, and the left side shielding modules and the right side shielding modules with different heights form a short sleeve assembly, a long sleeve assembly and a bottom end sleeve assembly respectively.

Description

technical field [0001] The invention relates to the technical field of nuclear facility radiation protection, in particular to a cast hollow cylindrical radiation shielding device. Background technique [0002] Almost all the radioactivity in the PWR nuclear power plant comes from the active area of ​​the reactor fuel assembly. With the operation of the nuclear power plant, the corrosion and activation products are continuously deposited on the equipment, valves, and inner walls of the main system and its auxiliary systems, forming some radioactive The point or local position of the radiation is often called a radioactive hot spot (abbreviated as a hot spot). The radiation levels of these hot spots are relatively high and difficult to eliminate. The strong penetrating radiation formed is the main reason for the increase of radiation levels in some workshops or areas of nuclear power plants. Other workers in the plant cause small dose accumulations, thereby increasing the co...

AI Technical Summary

Problems solved by technology

[0004] – The dose rate of hot spots is high, and the shielding performance of soft lead screen materials commonly used in power plants is limited, making it difficult to achieve the ideal shielding effect;

[0005] – There is no effective shielding device, it is difficult to fix the hot spot directly by using shielding material, and because the shielding material is usually heavy, it will cause a heavy safety impact on the pipeline and affect the safety of the process system equipment of the nuclear power plant;

[0006] – Using scaffolding as a support and then suspending the shielding material, the operation time is long, the radiation dose to the operator is large, and it needs to occupy a large space. It is extremely inconvenient to temporarily dismantle and reinstall

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