The formation of current internal exposure doses of the Ukrainian Polissia rural population

This work aimed to identify the specifics and trends of the development of the internal exposure dose (137Cs) of the rural population in Ukrainian Polissia. WBC-measurements were carried out in 2005-2013. Settlements of the Vyshgorod district of Kyiv region and Naroditsky district of the Zhytomyr region were selected for the research. Experimental data were processed using OriginPro 9 and Microsoft Excel 2016. The assumption about several distribution laws for each of the studied data sets was made based on the results of the descriptive statistics of mathematical data samples. The approximation of experimental data revealed an exponential distribution for one sample and attributes of both lognormal and normal distributions for the second one. The problem of exceeding the permissible level of internal exposure doses is relevant mainly for the rural population of Ukrainian Polissia. The novelty of the research is the valuation of objective laws of the formation of current internal exposure doses (by 137Cs) of the Ukrainian Polissia rural population. It was established that in the remote period after the Chornobyl accident an exponential distribution of internal exposure doses of the population is observed in rural settlements of Ukrainian Polissia. This indicates changes in the patterns of the formation of the radiation burden on local residents, which can be explained by the socio-demographic, environmental, and economic factors inherent with each settlement. Due to the nonuniform influence of these factors, the differentiation of settlements on the habitudes of the formation of internal exposure doses of the population takes place. The influence of various factors on the dose formation requires further in-depth study not only within the settlements but even also individual families.