Radon acquisition device and method

Abstract

The invention discloses a radon acquisition device and a method. The device comprises an acquisition box, an acquisition rack and a sealing box. The acquisition box is a cylindrical acquisition box. Two shaft end faces of the cylindrical acquisition box are formed by filtering nets. The interior of the cylindrical acquisition box is filled with activated carbon. The hole diameter of one net hole of each filtering net is smaller than the particular diameter of the activated carbon. The acquisition rack comprises a trapezoid base. The short edge of the trapezoid base is connected with a collecting rack wherein the acquisition box is embedded. The sealing box is used for sealing the acquisition box in the non-sampling state therein. The sealing box comprises a box body and a box cover. The box body and the box cover are in threaded connection with each other to form a sealing space. According to the invention, it is achieved that the acquisition box carries out double faced acquisition; the thickness of the acquisition box is proper; the shielding effect of outer layer activated carbon on the radon adsorption ability of the inner layer activated carbon can be neglected; the whole activated carbon can be allowed to uniformly absorb radon; and the accuracy of measurement results is improved.

Description

technical field [0001] The invention belongs to the technical field of air radon measurement, and in particular relates to a radon collection device and method. Background technique [0002] Radon gas is a tracer, which can indicate underground mineral deposits, geological structures, earthquakes, etc. Therefore, radon gas measurement is widely used in mineral geology, hydrogeology, engineering geology, disaster geology, environmental geology, etc. The radioactivity of radon is harmful to human health. More than ten years ago, the U.S. Environmental Protection Agency (EPA) publicly pointed out in the magazine "NATURE" that radon is a public problem related to public health; radon exists as a natural radiation in Soil, brick, cement, granite and other major building decoration materials are considered to be the second most carcinogenic factor next to smoking. The World Health Organization has listed radon as one of the 19 most carcinogenic substances. [0003] Activated carb...

AI Technical Summary

Problems solved by technology

[0004] The traditional radon measuring activated carbon box has only one side in contact with the air, the collection efficiency is not high and the thickness is 3-5cm. The activated carbon on the top layer has a shielding effect on the adsorption of radon by the activated carbon on the bottom layer. More than the amount of radon adsorbed by the bottom layer, the uneven adsorption of radon on the entire activated carbon layer will deviate from the linear relationship between the amount of radon adsorbed by activated carbon and the radon concentration in the air, resulting in large errors in the measurement results

When the detector is measuring, the bottom with less adsorbed radon is attached to the probe, which makes the detection efficiency lower

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