Foldable radiation shielding device

Abstract

The invention belongs to the field of nuclear radiation, and particularly relates to a foldable radiation shielding device. Shielding materials in the prior art are heavy and occupy large space. According to the foldable radiation shielding device in the invention, square connectors of two single-head ratchet wheel supporting arms are inserted into square inserting grooves in L-shaped connectors of tail end connecting supporting arm components, and the two ends of a transverse connecting rod are connected with the L-shaped connector sides of the two single-head ratchet wheel supporting arms through screws B; and square connectors of ratchet wheels at one ends of two double-end ratchet wheel supporting arms are inserted into square grooves in L-shaped connectors of the tail end connecting supporting arm components respectively, and then square connectors of ratchet wheels at the other ends of the two double-end ratchet wheel supporting arms are inserted into square grooves in L-shaped connectors above single-end ratchet wheel supporting arm side components respectively. The device has outstanding advantages in the aspects of safety performance, stability performance, convenience performance, personnel radiation dose control and the like.

Description

technical field [0001] The invention belongs to the field of nuclear radiation, and in particular relates to a foldable 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 hotspots 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 collective dose of the plant as a wh...

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Problems solved by technology

[0004] – The shielding method in which the shielding material directly covers the hot spot is more convenient to operate and the radiation dose to the operator is less, but since the shielding material is usually heavy and difficult to fix, it may cause damage to the hot spot equipment and affect the safety of the nuclear power plant process system, Currently being gradually replaced;

[0005] – The method of setting up scaffolding as a support and then suspending the shielding material can avoid the load on the equipment pipeline, but it needs to occupy a large space, the workload is heavy, the operation time is long, the radiation dose received by the operator is large, and other departments are required. Pre-built scaffolding is less effective, and it is extremely inconvenient to temporarily dismantle and reinstall if necessary

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