Method for finely configuring thickness of shielding layer based on grid cutting

A configuration method and grid segmentation technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problem of high space occupation requirements for radiation shielding volume, achieve convenient and fast calculation process, reduce overall quality, save The effect of material waste

Active Publication Date: 2017-04-26
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a fine configuration method of shielding layer thickness based on grid division, which solves the problem of fine design of shielding layer with high requirements for radiation shielding volume space occupation and strict quality control

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  • Method for finely configuring thickness of shielding layer based on grid cutting
  • Method for finely configuring thickness of shielding layer based on grid cutting
  • Method for finely configuring thickness of shielding layer based on grid cutting

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] A Co-60 point source at a location such as figure 2 As shown, the source activity is 4000 Curies, and the allowable dose rate outside the shielding layer is I 0 = 0.25 mR / h. The protective layer of lead material is adopted, and the shielding surface size of the protective layer is 10m×4m.

[0036] In this case, the position of the point source is on the far left side, and the radiation dose field inside the shielding layer is extremely unevenly distributed on the plane of the shielding layer. The fine thickness configuration method of the shielding layer based on grid division of the present invention is adopted to carry out the shielding layer plane in this embodiment. Right-angle mesh division, and fine thickness configuration for each mesh body. The steps of this method include five steps.

[0037]In the first step, the Monte Car...

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Abstract

The invention provides a method for finely configuring the thickness of a shielding layer based on grid cutting. According to the method, a shielding layer model is subjected to right-angle grid cutting and the grid thickness is configured for achieving the purpose of finely configuring the thickness of the shielding layer. The method mainly comprises five steps for completing the fine configuration for the thickness of the shielding layer: (1) calculating the dosage field distribution on the inner side of the shielding layer by adopting a Monte Carlo particle transporting program and collecting the maximum value, minimum value and coordinate position of the dosage rate; (2) calculating the initial maximal thickness and minimal thickness of the shielding layer by adopting a half-value layer method; (3) confirming the increasing step length of the grid thickness by adopting a thickness/size adapting principle; (4) confirming the size step length of the grid along the coordinate direction by adopting a constant thickness step length method and calculating the grid cutting quantity; and (5) configuring the grid thickness according to the thickness step length and the grid position. The method provided by the invention is suitable for the occasions with limited volume of design space of the shielding layer and higher demand on the thickness space occupation of the shielding layer.

Description

technical field [0001] The invention belongs to the field of radiation shielding protection design and optimization, and in particular relates to a method for finely configuring the thickness of a shielding layer based on grid division. Background technique [0002] During the operation of the nuclear device, a large number of neutrons and γ-rays radiate to the surroundings. When the operation stops, the neutron-activated materials also emit γ-rays to the surroundings. The shielding layer is mainly to prevent the staff and equipment structural materials from being damaged by these radioactive radiation. The thickness of the radiation shield plays an important role in attenuating the radiation dose rate. The radiation shielding layer keeps the dose rate outside the shielding layer at a reasonable minimum level to ensure that the personnel dose does not exceed the dose equivalent limit specified in the national radiation protection standard. [0003] The traditional radiatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/00
Inventor 闫其龙吴宜灿俞盛朋党同强李廷
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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