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  • 1 Institute of Radiation Protection National Research Center for Environment and Health D–85764 Neuherberg Germany
  • | 2 Radiation and Nuclear Safety Authority (STUK) P.O. Box 14 FIN 00881 Helsinki Finland
  • | 3 University of Helsinki Department of Chemistry, Laboratory for Radiochemistry P.O. Box 55 FIN 00014 Helsinki Finland
  • | 4 Institute of North Industrial Ecology Problems Fersman St. 14 Apatity 184200 Murmansk Region Russia
  • | 5 Central Kola Expedition 23 Komsomolskaya St. 184280 Monchegorsk Murmansk Region Russia
  • | 6 Geological Survey of Finland, (GTK) P.O. Box 77 FIN 96101 Rovaniemi Finland
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The industrial pollution of an ecosystem, e.g., by heavy metals, might also affect the behavior of fallout radionuclides in the soils of these areas. To study such effects, we determined at various distances from the huge copper-nickel smelters at Monchegorsk on the Kola Peninsula (Russia) and at a reference site: (1) the vertical distribution of fallout 137Cs,90Sr and239+240Pu in the soil, (2) the corresponding residence half-times in different soil horizons, and (3) the resulting external gamma-dose rates at these sites in 1 m height due to 137Cs in the soil. The data show that the residence half-times and the partitioning of the fallout radionuclides among the various soil horizons depend significantly on the extent of the heavy metal pollution at the sites. The resulting external gamma-dose rate in 1 m height due to 137Cs in the soil is, however, rather similar at the various sites.