System and method for measuring evolution rate of radon
A technology of radon exhalation rate and measurement method, which is applied in the field of radon exhalation rate measurement system, can solve the problems of inability to measure measurement results, failure to solve the effects of leakage and back diffusion, and low measurement results, etc.
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[0048] The principle of radon extraction rate measurement:
[0049] 1. Measuring method of radon extraction rate
[0050] Automatic measurement of radon extraction rate Such as figure 1 As shown, start the sampling pump and use the QL / min flow rate to extract the radon-containing air ΔT (not less than 1 minute) in the measured environment. At this time, the radon concentration in the measuring room is the radon concentration in the radon room at the initial time t=0. C 0 , Then buckle a radon cover with a volume of (V-ΔV--ΔV1) and a bottom area of S on the surface of the measured medium with a radon extraction rate of J, and then pass a closed measuring chamber with a volume of ΔV through the two tubes The internal volume is ΔV1. The silicone tube is connected with the radon cover to form a loop. After collecting for a certain period of time T-ΔT, turn on the sampling pump to mix the radon chamber with the radon in the measuring chamber at a flow rate of QL / min for ΔT time. Th...
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