The role of major transport ways in dissemination the Chernobyl radionuclides, involved in the absorbed dose formation in thyroid gland

The paper presents the analysis of distribution of thyroid cancer cases in children and adolescents over the territory of Bryansk oblast as well as the analysis of factors influencing formation of the absorbed dose in thyroid gland after the Chernobyl accident. A special attention is paied to the role of major transport ways in radionuclides migration. The majority of thyroid cancers was found to occur in inhabitants of settlements situated near from the main railways and motor roads irrespective of mean levels of radioactive contamination of territories. Possible mechanisms underlying dispersion of radionuclides by transportation means are discussed. Predictions have been made and activities are proposed on further research and medical examination of population groups at risk formed with consideration of "transportation factor".