ASSESSMENT OF TRITIUM CONTAMINATION LEVELS OF SNOW COVER AROUND THE MAYAK PRODUCTION ASSOCIATION
Study on the concentration of tritium in snow cover in the Mayak PA impact zone was performed in 2004-2005. The study covered an area within a radius of more than 30 km from the site. Variability of radionuclide concentrations in melt water was determined in the range from 6 ro 256 Bq / l. Dependence of the tritium concentration in snow on the distance as well as on the part of the world was identified. The concentration of tritium in all samples of melt water exceeded both the global level (1 Bq / l) and the mancaused level (5 Bq/ l) that is an evidence of the MPA contribution to the contamination of the area under study with tritium.