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Method and device for measuring soil potential radon concentration using electrostatic collection method

An electrostatic collection method and radon concentration technology, which is applied in the field of nuclear radiation detection, can solve the problems of low numerical accuracy, inability to accurately obtain soil potential radon concentration, and failure to consider leakage and back-diffusion effects.

Active Publication Date: 2018-12-25
HENGYANG NORMAL UNIV
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Problems solved by technology

However, there are still some problems in this method: when using a radon meter to measure the radon production rate in soil, leakage and back-diffusion effects are not considered; in addition, according to the calculation method of this scheme, the important data soil porosity η adopts the soil porosity The type look-up table can be approximated or taken back to the laboratory for measurement. The accuracy of the value is not high, which will lead to large errors in the obtained data, and the soil potential radon concentration cannot be accurately obtained.

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  • Method and device for measuring soil potential radon concentration using electrostatic collection method
  • Method and device for measuring soil potential radon concentration using electrostatic collection method
  • Method and device for measuring soil potential radon concentration using electrostatic collection method

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[0069] In order to make the objectives, technical solutions and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with examples. It should be understood that the embodiments described in this specification are only for explaining the present invention, not for limiting the present invention, and the specific parameter settings of the embodiments can be selected according to local conditions and have no substantial impact on the results.

[0070] The invention relates to a method for measuring soil potential radon concentration by electrostatic collection method, which includes a sampling process and a measurement and calculation process.

[0071] S1. Sampling process:

[0072] Utilize a steel ring knife of volume V with a ring knife handle connected by a thread (see figure 1 ), cut the soil in its natural state, and fill it with soil samples. Do not shake from side to side so that the...

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Abstract

The invention provides a method and a device for sampling and measuring surface soil to obtain soil potential radon concentration by using an electrostatic collection emanometer. The method comprisesa sampling process and a measuring and calculating process, and can quickly obtain an accurate soil potential radon concentration by a simple calculation method. A measurement system is closed by a sealing cover to form a closed loop gas path measurement device to improve the accuracy of the measurement. When measuring the production rate of radon and soil porosity for sampled soil, the decay, leakage and anti-diffusion effects of the radon are taken into consideration. An electrostatic collection manometer is used, the concentration of the radon is deduced reversely by the concentration of Po-218, and the accurate soil potential radon concentration is quickly calculated by using a nonlinear fitting algorithm, which saves measurement time since it is needless to wait for the concentrationof the radon in a measurement device to be stable.

Description

technical field [0001] The invention relates to a nuclear radiation detection technology, in particular to a method and a device for sampling and measuring surface soil by using an electrostatic collection radon measuring instrument to obtain the concentration of soil potential radon. Background technique [0002] Rocks and soils contain natural radioactive element uranium (radium), and the parent element uranium (radium) decays to produce radioactive radon gas. The chemical element radon, also known as radon, is a chemical element. The usual elemental form of radon is radon gas, which is a colorless, odorless, tasteless inert gas and is radioactive. When people inhale it, the decayed alpha particles of radon can cause radiation damage in the human respiratory system and cause lung cancer. [0003] Soil radon concentration is closely related to the indoor radon level of low-rise buildings and the radon level of underground buildings. Before design and construction, the soi...

Claims

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Application Information

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