Routine testing of radioactive aerosol filters

A method is described for state routine testing of radioactive aerosol filters used in nuclear engineering in DDR. Standard polydispersed aerosola with the particle size less than 1 μ are used. The dispersion of aerosols is measured before and behind the filter to determine the filtration factor as a function of the particle size. As an example a fiber glass filter and NaCl aerosola are considered. The performance testing is conducted at the filter productivity of 650 m3/hr. The maximum filtration factor has been found to correspond to the approximate particle size of 0.15 μ. The filtration factor depends strongly on the particle size