Development of exhaust filters to be used under extreme conditions

The investigations of stainless steel deep bed filters were continued under various working conditions. Measurement obtained with uranium as a test aerosol resulted in decontamination factors between 10.000 and 20.000 for particle sizes of 0.07 to 0.15 μm respectively. In order to investigate the influence of humidity and droplets, a special filter consisting of a pre-filter and a main-filter was used. Measurement of the decontamination factors obtained for various air velocities and simultanous spraying droplets did not show any influence on the deposition behaviour of the filter. At the clean air side no water could be detected. (orig./DG)