A radioactive flexible shielding device for foundation pits and its shielding bag

A technology of shielding device and shielding bag, which is applied in the field of nuclear radiation, can solve the problems of high exposure dose to personnel, limited operation of personnel, high cost of shielding layer, etc., and achieve the effect of reliable process, feasible method and cost saving

Active Publication Date: 2019-02-22
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of using lead bricks to build the shielding layer is high, and personnel still need to be close to the operation during the construction and dismantling process; using personnel to operate in the mobile shielding body, personnel operations are limited, and the radioactive area cannot be fundamentally shielded
At the same time, the process of dismantling the shielding body is complicated, and it cannot be dismantled quickly, and the personnel are exposed to a large dose of radiation.

Method used

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  • A radioactive flexible shielding device for foundation pits and its shielding bag
  • A radioactive flexible shielding device for foundation pits and its shielding bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 2 As shown, a flexible shielding device for highly radioactive foundation pits includes a foundation pit 1, a shielding bag 2 and a shielding material 3. According to the size of the foundation pit 1 on site, a matching shielding bag 2 is made and processed; Place a shielding bag 2 above the radioactive objects in the foundation pit 1; form a shielding layer by blowing air into the shielding bag 2, and then fill the shielding material 3 to form an overall shielding layer; shield the radioactive objects in the foundation pit 1. Shielding material 3 selects 6-8 mesh type quartz sand with a density of 2.6t / m 3 , bulk density 1.6t / m 3 . When the radioactive dose at the central position of the pit mouth is less than 100 μSv / h, the shielding thickness of the shielding material 3 piled up shall be reached.

[0025] Such as figure 2 As shown, the present invention uses a method for using a shielding bag for radioactive flexible shielding of foundation pits,...

Embodiment 2

[0033] Such as figure 1 As shown, a shielding bag used for radioactive flexible shielding of foundation pits of the present invention includes an inflatable bag body, the inflatable bag body 4 is used to hold the shielding material 3, the inflatable bag body 4 is a square hollow structure, and the inflatable bag body 4 It is formed by bonding and sewing the inner layer of glue and the outer layer of leather canvas, and the top surface of the inflatable bag body 4 is provided with a filling shielding material port 5 . Fill the shielding material 3 into the inflatable bag body 4 through the filling shielding material port 5 . An inflation port 6 is connected to one side of the port 5 for filling the shielding material, and the inflatable bag body 4 is inflated through the inflation port 6 . The left side, the right side and the bottom surface of the inflatable bag body are provided with a plurality of pulling up pull wires 7 . The front, rear and bottom surfaces of the inflata...

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Abstract

The invention discloses a radioactive flexible shielding device for foundation pits and a shielding bag thereof. The body is made of glued inner layer glue and leather outer layer canvas, and the upper surface of the inflatable bag body is provided with a port for filling shielding materials. The problem of difficult folding of the shielding bag, high cost, and difficulty in recycling in the construction of temporary shielding bodies in high-radioactive places has been successfully solved. The method of the present invention is feasible, reliable in process, safe and efficient, and cost-saving. Guaranteed shielding bag carding construction, recycling.

Description

technical field [0001] The invention relates to the field of nuclear radiation, in particular to a radioactive flexible shielding device for foundation pits and a shielding bag thereof. Background technique [0002] Among the many nuclear facilities in our country, there are a large number of maintenance work and facilities, equipment, and workshops that need to be decommissioned. During the operation, personnel need to enter the facility for close-range operation. Some factories have high radioactive doses and need temporary shielding, while traditional shielding methods generally use lead bricks to build the shielding layer or personnel enter the mobile shielding body for operation. The cost of using lead bricks to construct the shielding layer is high, and personnel still need to be close to the operation during the construction and dismantling process; using personnel to operate in the mobile shielding body, personnel operations are limited, and the radioactive area cann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02G21F3/00
CPCE02D17/02G21F3/00
Inventor 徐江李文钰张劲松李振臣毛常磊童刚刘懋袤张永康王帅王建强余兴平马志鹏赵俊徐强
Owner NUCLEAR POWER INSTITUTE OF CHINA
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