Method for measuring radon emanation rate by adopting two-stage method
A technology of radon exhalation rate and two-stage method, which is applied in the field of nuclear radiation detection, can solve the problems of low radon concentration, impossibility to reach equilibrium, low radon exhalation rate, etc.
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Embodiment 1
[0066] Embodiment 1: A method for measuring radon exhalation rate, which includes a measurement process and a calculation process.
[0067] 1. Measurement process:
[0068] Such as figure 1 , figure 2 As shown, buckle the radon hood 5 on the surface of the medium to be measured, or put the medium into the collection chamber of the radon hood, wherein figure 1 It is a schematic diagram of the measurement process of the surface of the medium, figure 2 It is a schematic diagram of the measurement process of particulate matter 8 or massive 7 substances. Because radon atoms in the medium escape from the surface and enter the radon collecting hood 5 under the action of diffusion and seepage, the radon concentration in the radon collecting hood 5 changes. The pump 6 pumps the radon in the radon hood 5 at a constant flow rate through the drying pipe 4 and the filter membrane 3 to filter out the progeny and then pumps it into the measurement chamber 2 at a flow rate of 0.5-2 li...
Embodiment 2
[0086] Embodiment 2. A method for measuring radon exhalation rate, which includes a measurement process and a calculation process.
[0087] 1. Measurement process:
[0088] Such as figure 1 , figure 2 As shown, buckle the radon hood 5 on the surface of the medium to be measured, or put the medium into the collection chamber of the radon hood, wherein figure 1 It is a schematic diagram of the measurement process of the surface of the medium, figure 2 It is a schematic diagram of the measurement process of particulate matter 8 or massive 7 substances. Because radon atoms in the medium escape from the surface and enter the radon collecting hood 5 under the action of diffusion and seepage, the radon concentration in the radon collecting hood 5 changes. The pump 6 pumps the radon in the radon hood 5 at a constant flow rate through the drying pipe 4 and the filter membrane 3 to filter out the progeny and then pumps it into the measurement chamber 2 at a flow rate of 0.5-2 li...
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