Device and method for quickly measuring effective diffusion coefficient of radon in film through static collection method

An electrostatic collection method and diffusion coefficient technology, applied in the field of nuclear radiation detection, can solve the problems of long time and achieve the effect of high radon concentration, accurate diffusion coefficient, and simple structure

Active Publication Date: 2019-04-19
HENGYANG NORMAL UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing measurement method only measures the effective diffusion coefficie...

Method used

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  • Device and method for quickly measuring effective diffusion coefficient of radon in film through static collection method
  • Device and method for quickly measuring effective diffusion coefficient of radon in film through static collection method
  • Device and method for quickly measuring effective diffusion coefficient of radon in film through static collection method

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Embodiment

[0057] Embodiment, the device for quickly measuring the effective diffusion coefficient of radon in thin film materials by the electrostatic collection method radon measuring instrument, including a measurement chamber 1, an electrostatic collection method radon measuring instrument 2, a main pump 3, an annular sealing gasket 4, and a first cylinder with an opening at one end Shaped air intake cavity 5, a second cylindrical air intake cavity 6 with one end open, an auxiliary pump 7 and a standard radon chamber 8.

[0058] The measuring chamber 1 includes a threaded cylindrical barrel 1-1 at both ends and threaded end caps 1-2 connected to the two ends of the cylindrical barrel 1-1. On the wall of the cylindrical barrel 1-1 The air outlet joint 1-1-1 and the air intake joint 1-1-2 are symmetrically arranged, the inner diameter of the cylindrical cylinder 1-1 is D1, and the threaded end cap 1-2 is provided with an annular groove 1-2-1, An annular sealing gasket 4 is installed in...

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Abstract

The invention provides a device and a method for quickly measuring an effective diffusion coefficient of radon in a film material through a static collection method. A first cylindrical air inlet chamber and a second cylindrical air inlet chamber in the measuring device are respectively mounted on threaded end covers at two ends of a measuring chamber. An air outlet joint on the measuring chamberis connected with an air inlet end on a radon measuring instrument. An air outlet end on the radon measuring instrument is connected with the air inlet end of a main pump. The air outlet end of the main pump is connected with an air inlet joint on the measuring chamber. An air outlet of a standard radon chamber is connected with the air inlet joint of the first cylindrical air inlet chamber. The air outlet joint of the first cylindrical air inlet chamber is connected with the air inlet end of an auxiliary pump. The air outlet end of the auxiliary pump is connected with the air inlet joint of the second cylindrical air inlet chamber. The air outlet joint of the second cylindrical air inlet chamber is connected with the air inlet of the standard radon chamber. In measurement, film plates abut against two ends of the cylindrical cylinder, and furthermore compression and sealing by a threaded end cover are performed. After measurement, the effective diffusion coefficient of the radon in the thin film material is quickly obtained through calculation.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a device and method for quickly measuring the effective diffusion coefficient of radon in a thin film by using an electrostatic collection method radon measuring instrument. Background technique [0002] Radon is a radioactive inert gas harmful to the human body. Radon in the air environment mainly comes from the precipitation on the surface of the medium. Due to mine radiation protection and indoor radon pollution, it is necessary to use a dense film to prevent radon from entering the working and living environment. The effective diffusion coefficient of radon in the film can be used to evaluate the barrier performance of the film to radon. The existing method for measuring the effective diffusion coefficient of radon in the film is generally to use a film to divide the inner cavity of the measurement chamber into two measurement chambers, wherein One measur...

Claims

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Application Information

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IPC IPC(8): G01T1/167
CPCG01T1/167
Inventor 袁红志谭延亮
Owner HENGYANG NORMAL UNIV
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