Evaluation of the expected doses of fire brigades at the chornobyl exclusion zone in april 2015

Abstract

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 μSv in case of external exposure and 0.37 μSv 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 ad 241Pu (along with 238-240Pu and 241Am) make the most significant contribution to the internal dose of firefighters during forest and grass-land fires suppression in the ChEZ.