Evaluation of the expected doses of fire brigades at the Chornobyl exclusion zone in April 2015

Assessment of area and behavior of large wildfire in the Chornobyl Exclusion Zone (ChEZ) which has been burning during April 27 - 29, 2015. Levels of radionuclide contamination of combustible material show that expected effective dose of firefighters during one fire-line hour did not exceed 0.64 .Sv in case of external exposure and 0.37 .Sv in case of internal exposure. It is shown that the expected effective dose of internal exposure of firefighters during suppression of wildfires in ChEZ were below the dose from external exposure. At the moment exposure of ⁹⁰Sr and ²⁴¹Pu (along with ²³⁸-²⁴⁰Pu and ²⁴¹Am) make the most significant contribution to the internal dose of firefighters during forest and grassland fires suppression in the ChEZ.