Device and method for scaling coefficient of radon measuring instrument with activated carbon box

Abstract

The invention discloses a device and a method for scaling coefficient of a radon measuring instrument with an activated carbon box. The device comprises a constant-temperature and constant-humidity box, a radon collecting box, uranium ore, a sealing box, the activated carbon box, three air valves, and a radon concentration measuring system, wherein the radon collecting tank and the sealing box arearranged in the constant-temperature and constant-humidity box; the uranium ore is arranged in the radon collecting tank; the activated carbon box is arranged in the sealing box; a first plastic flexible guide pipe is connected between the radon collecting tank and the sealing box in a penetrating way; a second plastic flexible guide pipe is connected between the sealing box and a first connecting port of the radon concentration measuring system; a third plastic flexible guide pipe is connected between the sealing box and a second connecting port of the radon concentration measuring system; the middle sections of the first plastic flexible guide pipe and the second plastic flexible guide pipe are connected with a fourth plastic flexible guide pipe; the first plastic flexible guide pipe, the second plastic flexible guide pipe and the fourth plastic flexible guide pipe are respectively connected with the first air valve, the second valve and the third air valve. The device has the advantages that the cost is lower, the operation is simple and convenient, the scaling cycle is short, and the result is accurate.

Description

technical field [0001] The invention belongs to the technical field of radon measurement in air, and in particular relates to an instrument coefficient calibration device and method for measuring radon with an activated carbon box. 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 rado...

AI Technical Summary

Problems solved by technology

However, the preparation of standard radon chambers is complicated and expensive, and most units or teams that need to measure radon do not have the conditions to have standard radon chambers

Sending out the scale is a commonly used calibration or calibration method for measuring instruments, but the activated carbon box radon measurement system includes a shielded gamma energy spectrum measurement system, which cannot be sent out because it is too bulky, so the activated carbon box cannot be sent out for calibration. , which greatly limits the popularization and application of activated carbon box radon measurement method

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