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Device and method for adjusting radon exhalation rate and effective decay constant of radon exhalation rate standard device

A radon exhalation rate and standard device technology, which is applied in the field of nuclear radiation detection, can solve problems such as inadequacy, and achieve the effect of simple measurement devices and measurement methods

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 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

Method used

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  • Device and method for adjusting radon exhalation rate and effective decay constant of radon exhalation rate standard device
  • Device and method for adjusting radon exhalation rate and effective decay constant of radon exhalation rate standard device
  • Device and method for adjusting radon exhalation rate and effective decay constant of radon exhalation rate standard device

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Effect test

Embodiment 1

[0049] Embodiment 1, the device for adjusting radon exhalation rate standard device radon exudation rate and effective decay constant, including measuring instrument 1, filter membrane 2, drying pipe 3, collecting radon cover 4, pump 5, dense material plate 6, outlet joint 7, Air intake connector 8, air-flow radon source 9, adjustable micropump 10 and flow meter 11.

[0050] 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 pipeline 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 pipeline, the gas outlet joint 7 and the air inlet joint 8 are respectively installed on the den...

Embodiment 2

[0052] Embodiment two, adopt the device that regulates radon extraction rate standard device radon extraction rate and effective decay constant as described in embodiment one to adjust the method for radon extraction rate standard device radon extraction rate and effective decay constant, including conventional radon extraction rate The measurement process and the process of using the flow-type radon source to adjust the radon exhalation rate and effective decay constant of the radon exhalation rate standard device, the specific measurement process is as follows:

[0053] A. Conventional radon exhalation rate measurement process

[0054] The routine radon exhalation rate measurement process is as attached figure 2As shown, the radon collecting hood 4 with an opening on one side 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, resulti...

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Abstract

The invention discloses a device and a method for adjusting radon exhalation rate and effective decay constant of a radon exhalation rate standard device. One end of the filter membrane in the device 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, and the other end of the drying pipe is connected with a radon collecting cover through a pipeline; one end of the pump is connected with a 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, and the other end of the adjustable micro pump is connected with the flowmeter through a pipeline; the other end of the flowmeter is connected with the gas flow type radon source through a pipeline, and the other end of the gas flow type radon source 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. Herein, 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 exhalation rate standard device by using a flow-type radon source. 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 rese...

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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