Method for measuring precipitation rate of radon

A technology of radon exhalation rate and measuring room, which is applied in the field of nuclear radiation detection, can solve the problems of low radon exhalation rate, and achieve the effects of improving reliability, reducing cost, and accurate radon exhalation rate

Inactive Publication Date: 2011-11-23
HENGYANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Since the radon concentration has been rising during the rapid measurement of the radon concentration, it is impossible for radon and its decay progeny polonium 218 to reach a balance. Therefore, the radon exhalation rate obtained by the existing calculation method is also low

Method used

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  • Method for measuring precipitation rate of radon
  • Method for measuring precipitation rate of radon
  • Method for measuring precipitation rate of radon

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Embodiment

[0048] Embodiment: a method for measuring radon exhalation rate, which includes a measurement process and a calculation process.

[0049] 1. Measurement process:

[0050] Such as figure 1 , figure 2 As shown, buckle the radon hood 5 on the surface of the medium to be measured, or put the medium into the collection chamber of the radon hood, wherein figure 1 It is a schematic diagram of the measurement process of the surface of the medium, figure 2 It is a schematic diagram of the measurement process of particulate matter 8 or massive 7 substances. Because radon atoms in the medium escape from the surface and enter the collection chamber of the radon hood 5 under the action of diffusion and seepage, the radon concentration in the collection chamber of the radon hood 5 changes. Pump 6 is pumped into measurement chamber 2 after the radon in the collection chamber of radon hood 5 is filtered through drying pipe 4 and filter membrane 3 at a constant flow rate, and the flow ...

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Abstract

The invention relates to a method for measuring the precipitation rate of radon, which comprises a measuring step and a calculating step. A radon collection cover is covered on the surface of a medium to be tested or the medium is put in the radon collection cover, a group of radon concentration data is obtained after measuring at time intervals, and the radon concentration data obtained by measure are fitted in a nonlinear way to obtain the precipitation rate of radon according to a formula (9); or measure data after 20 min are fitted in a nonlinear way to obtain the precipitation rate of radon according to a formula (10).

Description

Technical field [0001] The present invention involves a nuclear radiation detection technology, especially a method of measurement rate. Background technique [0002] In the air environment, the main methods of the medium surface are mainly precipitated on the surface of the medium surface.The activated carbon absorbing attached method is the adsorption of the activated carbon to precipitate, and the γ spectrum generated by adsorbing in the activated carbon is measured to measure the output rate. This method is measured for a long time and is not easy to automate;The average analysis rate for a period of time has important statistical significance and reference value.The use of cumulative electrostatic collection of electrostatic 氡 analyzers is widely used by its simple and fast and instant measurement.At present, the cumulative method uses a pupae to collect the medium, and then measures the change of the concentration of the concentration in the hood, and the measurement data i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/167
Inventor 谭延亮肖田周毅
Owner HENGYANG NORMAL UNIV
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