Generalized results of individualized exposure doses reconstruction for the subjects of Ukrainian State Register of persons, affected to Chornobyl accident

Since 2007, the department of dosimetry of NRCRM has been working for to supply the Ukrainian State Register ( SRU ) of persons affected due to Chornobyl accident by exposure doses estimations. As of now, the individualization of doses has been performed for nine districts located in Kyiv, Zhytomyr, Rivne and Chernihiv region. The structure of raion-specific models used for the reconstruction of individualized doses was described in detail in the previous 19-th issue of this Journal (2014). The choice conditions for persons from the SRU using which for each raion there was formed a contingent of persons for whom the dose could be reconstructed. During the period of 2007- 2015, the individualized dose was reconstructed for 244226 persons in 9 districts, representing ∼ 58% of all registered in the SRU inhabitants of the districts. The calculation results were transferred to the SRU in formats adapted to the common database structure of the SRU. For each person who satisfied the conditions of selection there were estimated: 1) possible absorbed internal exposure dose of the thyroid by radioiodine in 1986 (assuming that the person in 1986 lived in the same village where he/she was enlisted in the SRU); 2) annual doses of external, internal and total exposure of the whole body for a period of observation in the SRU; 3) total exposure dose of whole body accumulated during the period of observation in the SRU; 4) the total cumulative dose of feasible exposure during the period since 1986 till the decision to be registered in the SRU. There are presented the generalized results of the SRU subjects distribution for different districts in dependence on intervals of doses accumulated at different periods after the accident. The raion matrix tables show the dynamics of accumulation of doses by the SRU subjects both for their stay on the account and for the period of their possible residence in the settlement of registration since 1986. The directions for further research to be implemented for increasing the number of persons for whom it is possible to calculate individualized dose have been formulated