A flexible shielding method for highly radioactive foundation pits

A highly radioactive and radioactive technology, applied in the field of nuclear radiation, can solve the problems of personnel operation restrictions, high cost of shielding layer, and shielding of areas that cannot be radioactive, and achieve the effects of reliable process, simple operation, and reduced secondary waste generation

Active Publication Date: 2019-06-14
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that 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 cannot be fundamentally shielded

Method used

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  • A flexible shielding method for highly radioactive foundation pits
  • A flexible shielding method for highly radioactive foundation pits

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Embodiment

[0023] Such as figure 1 As shown, the present invention is a flexible shielding method for highly radioactive foundation pits, comprising steps:

[0024] Step 1) Make and process a matching shielding bag according to the size of the foundation pit 1 on site; the shielding bag is made by bonding the inner layer of rubber and the outer layer of canvas.

[0025] Step 2) Place a shielding bag above the radioactive objects in the foundation pit 1 that needs to be shielded; choose 6-8 mesh quartz sand as the shielding material 3, with a density of 2.6t / m 3 , bulk density 1.6t / m 3 .

[0026] Step 3) Then fill the shielding bag with shielding material 3 to form an overall shielding layer; shield the radioactive objects in the foundation pit 1 . 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.

[0027] Step 4) After constructing the shielding body and completing ...

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Abstract

The invention discloses a flexible shielding method for highly radioactive foundation pits, comprising the steps of: step 1) making and processing a matching shielding layer according to the size of the foundation pit on site; step 2) placing radioactive objects in the foundation pit to be shielded Place the shielding layer above; step 3) then fill the shielding material to form an overall shielding layer; shield the radioactive objects in the foundation pit. It successfully solves the problems of high exposure dose, long time consumption, and high material cost in the construction of temporary shields in high-radioactive places. The method of the present invention is feasible, reliable in process, safe and efficient, simple in operation, cost-saving, and reduces the amount of secondary waste generated. It ensures that the radioactive radiation level in the operating area of ​​the staff reaches an acceptable value, so that the construction work in this area can be successfully completed.

Description

technical field [0001] The invention relates to the field of nuclear radiation, in particular to a flexible shielding method for highly radioactive foundation pits. 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 cannot be fundamentally s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21F3/00G21F1/02E02D17/02
CPCE02D17/02G21F1/02G21F3/00
Inventor 徐江张劲松李文钰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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