Method of adjusting radon exhalation rate and effective decay constant by using radon chamber

A technology of radon precipitation rate and decay constant is applied in the field of nuclear radiation detection, which can solve the problems of insufficiency and the like, and achieve the effect of simple measurement device and measurement method.

Active Publication Date: 2022-06-21
HENGYANG NORMAL UNIV
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  • Abstract
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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 device. It is not sufficient to compare only under a certain effective decay constant condition, and it is necessary to be able to adjust the effective decay constant arbitrarily. method

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  • Method of adjusting radon exhalation rate and effective decay constant by using radon chamber
  • Method of adjusting radon exhalation rate and effective decay constant by using radon chamber
  • Method of adjusting radon exhalation rate and effective decay constant by using radon chamber

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Embodiment 1

[0047] Embodiment 1. A device for adjusting the radon precipitation 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 collection cover 4, a pump 5, a dense material plate 6, an air outlet connector 7, an air intake Joint 8, radon chamber 9, adjustable micro pump 10 and flow meter 11.

[0048] 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 tube 3 through a pipeline, the other end of the drying tube 3 is connected to the radon collecting cover 4 through a pipeline, and one end of the pump 5 is connected through a pipeline. The pipeline is connected to the measuring chamber of the measuring instrument 1, the other end of the pump 5 is connected to the radon collecting cover 4 through the pipeline, the gas outlet joint 7 and the gas inlet joint 8 are res...

Embodiment 2

[0050] Embodiment 2, adopt the device that utilizes radon chamber to adjust radon precipitation rate and effective decay constant as described in embodiment 1 to adjust radon precipitation rate standard device radon precipitation rate and the method for effective decay constant, including conventional radon precipitation rate measurement process And utilize the radon chamber to regulate the process of the radon precipitation rate and the effective decay constant of the radon precipitation rate standard device, and its concrete measurement process is as follows:

[0051] A, conventional radon precipitation rate measurement process

[0052] The routine radon extraction rate measurement process is as attached figure 2 As shown, the radon collecting cover 4 with one side of the opening is buckled on the surface of the medium to be measured, because the radon atoms in the medium escape from the surface and enter the radon collecting cover 4 under the action of diffusion and seepage...

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Abstract

A device and method for adjusting radon exhalation rate and effective decay constant by using a radon chamber, one end of the filter membrane in the device is connected to the measuring room of the measuring instrument through a pipeline, the other end of the filter membrane is connected to a drying pipe through a pipeline, and the other end of the drying pipe is passed through The pipeline is connected to the radon collecting hood, one end of the pump is connected to the measuring chamber of the measuring instrument through the pipeline, the other end of the pump is connected to the radon collecting hood through the pipeline, the gas outlet joint and the air inlet joint are respectively installed on the dense material plate, and the gas outlet joint passes through the pipeline It is connected with an adjustable micropump, the other end of the adjustable micropump is connected with a flowmeter through a pipeline, the other end of the flowmeter is connected with a radon chamber through a pipeline, and the other end of the radon chamber is connected with an air inlet joint through a pipeline. The measurement method includes the conventional radon exhalation rate measurement process and the process of using a radon chamber to adjust the radon exhalation rate and effective decay constant of the radon exhalation rate standard device. By adjusting the flow rate of the adjustable micropump in the device, the radon exhalation rate can be adjusted and the effective decay constant.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a method for adjusting the radon precipitation rate and effective decay constant of a radon precipitation 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 media such as soil. There are many methods and instruments for measuring the radon precipitation rate on the surface of the medium. Since the radon precipitation rate on the surface of the medium such as soil varies greatly with the changes of the temperature, humidity and air pressure of the environment, the accuracy and reliability of the method and instrument for measuring the radon precipitation rate on the medium surface need to be independent of the environment. Standard device for radon release rate for changes in temperature, humidity and air pressure. Some researchers have proposed to use the change...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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