  The physical features of distribution of the small dispersive coal dust
particles and the adsorbed radioactive chemical elements and their isotopes in
the absorber with the granular filtering medium with the cylindrical coal
granules were researched in the case of the intensive air dust aerosol stream
flow through the iodine air filter (IAF). It was shown that, at the certain
aerodynamic conditions in the IAF, the generation of the acoustic oscillations
is possible. It was found that the acoustic oscillations generation results in
an appearance of the standing acoustic waves of the air pressure (density) in
the IAF. In the case of the intensive blow of the air dust aerosol, it was
demonstrated that the standing acoustic waves have some strong influences on
both: 1) the dynamics of small dispersive coal dust particles movement and
their accumulation in the IAF; 2) the oversaturation of the cylindrical coal
granules by the adsorbed radioactive chemical elements and their isotopes in
the regions, where the antinodes of the acoustic waves are positioned. Finally,
we completed the comparative analysis of the theoretical calculations with the
experimental results, obtained for the cases of: 1) the experimental
aerodynamic modeling of physical processes of the absorbed radioactive chemical
elements and their isotopes distribution in the IAF; and 2) the
gamma-activation spectroscopy analysis of the absorbed radioactive chemical
elements and their isotopes distribution in the IAF. We made the innovative
propositions on the necessary technical modifications with the purpose to
improve the IAF technical characteristics and increase its operational time at
the nuclear power plant (NPP), going from the completed precise
characterization of the IAF parameters at the long term operation.
