Method and device for optionally adjusting radon exhalation rate and effective decay constants

A decay constant and adjusting device technology, applied in the field of simulating radon precipitation, can solve the problem that the radon precipitation rate and the effective decay constant cannot be adjusted arbitrarily, and achieve the effect of simple and practical structure

Active Publication Date: 2014-01-08
HENGYANG NORMAL UNIV
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Problems solved by technology

[0016] But there is a problem in existing radon extraction rate standard device 10, because the porosity of gypsum board 10-3 and the porosity on foamed plastics board 10-2 are fixed, so the radon extraction rate of radon extraction rate standard device 10 and effective The decay constant cannot be adjusted arbitrarily

Method used

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  • Method and device for optionally adjusting radon exhalation rate and effective decay constants
  • Method and device for optionally adjusting radon exhalation rate and effective decay constants
  • Method and device for optionally adjusting radon exhalation rate and effective decay constants

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Embodiment Construction

[0043]A method for arbitrarily adjusting the radon exhalation rate and effective decay constant. During the measurement process, the solid radon source 7 is placed on the panel 1-1 of the adjustment device 1, and the opening collection radon cover 8 in the existing measurement device is buckled on the adjustment device. On the panel 1-1 of the device 1, a plurality of small holes 1-1-1 are arranged on the panel 1-1 of the regulating device 1, and the effective decay constant is adjusted by controlling the opening and closing of the small holes 1-1-1, and the The radon exhalation rate is adjusted by using solid radon sources 7 with different source intensities. Assuming that there are 9 small holes 1-1-1 on the panel 1-1 of the regulating device 1, the aperture is 0.5mm, and the leakage coefficient of each small hole 1-1-1 is , if there are three small holes 1-1-1 blocked, the effective decay constant is:

[0044] (4)

[0045] The adjusting device 1 us...

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Abstract

The invention provides a method and device for optionally adjusting radon exhalation rate and effective decay constants. During measurement, a solid radon source is placed on the plane of the adjusting device, an opening radon collecting cover of an existing device on the plane of the adjusting device, a plurality of small holes are formed in the plane of the adjusting device, the effective decay constants are adjusted by controlling the small holes to open and close, and the radon exhalation rate is adjusted by using the solid radon sources with different source strengths; the number of the small holes in the plane of the adjusting device is N, the diameter of the hole ranges from 0.1mm to 1mm, and the leakage coefficient of each hole is lambda leak1; if n small holes are sealed, the effective decay constants are calculated through a formula (4): lambda e = lambda + (N-n)* lambda leak1. The adjusting device adopted by the method comprises a plane and an adjusting plate.

Description

technical field [0001] The invention relates to a nuclear radiation simulation method and device, in particular to a method and device for simulating radon precipitation. 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. [0003] Existing radon exhalation rate standard device 10 such as attached Figure 11 As shown, it includes a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01T1/167
Inventor 谭延亮刘典文袁红志
Owner HENGYANG NORMAL UNIV
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