Device and method for adjusting radon exhalation rate and effective decay constant by using radon chamber

A technology of radon exhalation rate and decay constant, which is applied in the field of nuclear radiation detection, can solve problems such as insufficiency, and achieve the effect of simple measurement method

Active Publication Date: 2021-08-31
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] It is not sufficient to test the accuracy and reliability of the method and instrument for measuring the radon exhalation rate on the surface of the medium on a standard de...

Method used

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  • Device and method for adjusting radon exhalation rate and effective decay constant by using radon chamber
  • Device and method for adjusting radon exhalation rate and effective decay constant by using radon chamber
  • Device and method for adjusting radon exhalation rate and effective decay constant by using radon chamber

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Experimental program
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Effect test

Embodiment 1

[0048] Embodiment 1. A device for adjusting radon exhalation rate and effective decay constant by using a radon chamber, including a measuring instrument 1, a filter membrane 2, a drying tube 3, a radon collecting hood 4, a pump 5, a dense material plate 6, an air outlet joint 7, and an air inlet Joint 8, radon chamber 9, adjustable micro pump 10 and flow meter 11.

[0049] One end of the filter membrane 2 is connected to the measuring chamber of the measuring instrument 1 through a pipeline, the other end of the filter membrane 2 is connected to the drying pipe 3 through a pipeline, the other end of the drying pipe 3 is connected to the radon collecting hood 4 through a pipeline, and one end of the pump 5 passes through The pipe is connected to the measuring room of the measuring instrument 1, the other end of the pump 5 is connected to the radon collecting cover 4 through the pipe, the gas outlet joint 7 and the air inlet joint 8 are respectively installed on the dense materi...

Embodiment 2

[0051] Embodiment two, adopt the device that utilizes radon chamber to regulate radon exhalation rate and effective decay constant as described in embodiment one to adjust radon exhalation rate standard device radon exhalation rate and the method for effective decay constant, comprise conventional radon exhalation rate measurement process And the process of using the radon chamber to adjust the radon exhalation rate and the effective decay constant of the radon exhalation rate standard device, the specific measurement process is as follows:

[0052] A. Conventional radon exhalation rate measurement process

[0053] The routine radon exhalation rate measurement process is as attached figure 2As shown, the radon collecting hood 4 with one opening is buckled on the surface of the medium to be measured, and the radon atoms in the medium escape from the surface and enter the radon collecting hood 4 under the action of diffusion and seepage, resulting in the change of the radon conc...

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Abstract

The invention discloses a device and a method for adjusting radon exhalation rate and effective decay constant by using a radon chamber. In the device, one end of a filter membrane is connected with a measuring chamber of a measuring instrument through a pipeline, the other end of the filter membrane is connected with a drying pipe through a pipeline, the other end of the drying pipe is connected with a radon collecting cover through a pipeline, and one end of a pump is connected with the measuring chamber of the measuring instrument through a pipeline; the other end of the pump is connected with the radon collecting cover through a pipeline, the gas outlet connector and the gas inlet connector are respectively installed on the compact material plate, the gas outlet connector is connected with the adjustable micro pump through a pipeline, the other end of the adjustable micro pump is connected with the flow meter through a pipeline, and the other end of the flow meter is connected with the radon chamber through a pipeline; the other end of the radon chamber is connected with the gas inlet connector through a pipeline. The measurement method comprises a conventional radon exhalation rate measurement process and a process of adjusting the radon exhalation rate and the effective decay constant of the radon exhalation rate standard device by using the radon chamber. Therefore, the radon exhalation rate and the effective decay constant can be adjusted by adjusting the flow rate of the adjustable micro pump in the device.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a device and method for adjusting the radon exhalation rate and effective decay constant of a radon exudation rate standard device by using a radon chamber. Background technique [0002] Radon in the air environment mainly comes from the precipitation on the surface of soil and other media. There are many methods and instruments for measuring the radon precipitation rate on the surface of the medium. Since the exhalation rate of radon on the surface of soil and other media varies greatly with the change of the temperature, humidity and air pressure of the environment, it is necessary to check the accuracy and reliability of the method and instrument for measuring the exudation rate of radon on the surface of the media, without being affected by the environment. Radon exhalation rate standard device for temperature, humidity and air pressure changes. Some researchers pr...

Claims

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Application Information

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IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 谭延亮袁红志范钟凯胡滔林芬莫贻香谢若梅袁帅刘帅彬
Owner HENGYANG NORMAL UNIV
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