Continuous measurement device and measurement method for radon exhalation rate

Abstract

The invention discloses a continuous measurement device and a measurement method for the radon exhalation rate. The continuous measurement device comprises a radon measurer, wherein the radon measurercomprises a gas storage tank; the continuous measurement device further comprises a controller and a radon collection hood; the radon collection hood is a hood body; a flow guide plate is arranged atthe inner top of the hood body; the size of the gas storage tank is 10% less than that of the radon collection hood; a gas feeding pipe is arranged at one end of the radon collection hood, and a gasdischarging pipe is arranged at the other end of the radon collection hood; the radon measurer is arranged on the gas discharging pipe, and is connected with the controller; the continuous measurementdevice further comprises an air flow measurement and control unit, a drying system, a sensor group, a GPRS system and a power supply unit. The continuous measurement device can change the state of the environment of a measurement position; the humidity of measured gas is controlled by the drying system; the gas with high gas flow becomes uniform through the flow guide plate; the radon concentration in the radon collection hood is adjusted through a controllable gas pump, so that a measurement process is in a state free of interference caused by the humidity, the radon concentration and a radon inverse diffusion coefficient, and the measurement precision is improved.

Description

Technical field [0001] The invention relates to a radon extraction rate measuring device and a measuring method, and in particular to a continuous radon extraction rate measuring device and a measuring method. Background technique [0002] The measurement of radon evolution rate plays an important role in the field of radiation environment, especially in the decommissioning of uranium mines and mine tailings monitoring. The continuous monitoring of radon evolution rate is also widely used in the fields of geological disasters and geological exploration. At present, the continuous monitoring device for radon extraction rate is mainly based on the flow-gas principle for monitoring. [0003] According to the description of Sun Ke et al. in the prior art, the monitoring equipment for the flow-gas radon coefficient rate is mainly composed of a radon gas meter, an air pump and a radon cover. Sun Ke and others used the alpha guard instrument as the measurement host to complete the radon...

AI Technical Summary

Problems solved by technology

The host has no remote data transmission capability, and the staff needs to be on duty to operate, and a single-pump filter chamber is used for sampling, which is difficult to achieve the goal of optimizing the radon measurement error optimization

However, the invention patent applied by Xiao Detao et al. adopts continuous cumulative measurement. For the measurement of high-concentration radon gas release rate, the measurement result of radon gas release rate is affected by back diffusion.

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