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Flexible shielding method for high-radioactive foundation pit

A highly radioactive and radioactive technology, applied in the field of nuclear radiation, can solve the problems of high cost of shielding layer, shielding of non-radioactive areas, and personnel operation restrictions, and achieve the effects of simple operation, reduced secondary waste generation, and reliable process

Active Publication Date: 2017-11-14
NUCLEAR POWER INSTITUTE OF CHINA
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  • 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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  • Flexible shielding method for high-radioactive foundation pit

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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 a high-radioactive foundation pit. The method comprises the following steps: (1) manufacturing and processing a mated shielding layer according to the size of a field foundation pit; (2) putting the shielding layer on a to-be-shielded radioactive object in the foundation pit; and (3) filling a shielding material to form an integral shielding layer to shield the radioactive object in the foundation pit. The method successfully solves the problems of high staff radiated dose, long duration, high material cost and the like of a temporary shielding construction in a high-radioactive place, is feasible, reliable in process, safe and efficient, the operation is simple, the cost can be saved and the secondary pollution production can be alleviated, so that the radioactive level of staff in the operation area can reach an acceptable value, and the construction operation in the area can be smoothly 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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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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