Abstract
In this work, the permeability of the radioactive aerosol particles through different types of Petryanov filters is studied. The experiments were performed with standard radon box, special diffusion battery and AIP-2 cascade impactor. During the experiments a significant breakthrough is observed for different aerosol filters. The various size modes of the radioactive aerosols passing throw the filter are studied. At low aerosol concentration, the penetration of 1 nm approximately 1% and for 20 nm is varied from 12 to 20%. The different types of filters prevented all unattached radon decay products and the most size activity became with AMTD ~ 10 nm. At high aerosol concentration, the activity of unattached fraction nearly deleted. The activity of aerosols with AMTD ~ 10 nm is increased. The filters prevented all particles higher than 0.8 µm.
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