Method for controlling radon concentration of Rn/Tn mixed radon chamber
A control method and hybrid technology, which is applied in the direction of various fluid ratio control, etc., can solve the problems of short life, difficult radon and daughter body dynamic stability and uniform distribution, etc.
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[0045] Embodiment 1: The present invention will be described in more detail through the drawings and specific embodiments below.
[0046] For a newly built Rn / Tn mixed radon chamber, before using this method, the effective half-life of radon emanation in the mixed chamber must be calculated through experiments and the effective half-life of thoron in the mixing chamber .
[0047] The method of measuring the effective half-life of radon emanation is to first fill a certain amount of radon emanation into the mixed radon chamber, then turn off the source of radon emanation and the control system to make the radon emanation in the mixing chamber naturally attenuate. Use the radon emanation measuring instrument to monitor continuously for more than 4 days, and substitute the monitoring data into formula (7) to calculate the effective half-life of radon emanation in the mixing chamber .
[0048] ………………………………(7)
[0049] In formula (7), is the measurement time, unit ; ...
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