This study identified the potential exposure of the workers in the coal mine Tusnica. The results of the investigation showed increased activity of brown coal up to 1060(88 Bq kg-1 for 238U, 976(30 Bq kg-1 for 226Ra and 118(31 Bq kg-1 for 232Th. Dose rate measurements ranged from 0.07 to 0.25 íSv h-1. The annual ED, taking into account external exposure to ambient gamma radiation and internal exposure due to inhalation of the resuspended dust, would be 1.6 mSv a-1. The results presented lead to the conclusion that Tusnica coal mine contains brown coal with significant radioactivity, indicating that the working hours in the area should be regulated and the use of respiratory protective equipment is obligatory.
Authors: Vidic, A.; Ilic, Z.; Deljkic, D.; Adrovic, F. ;Full Source: Radiation Protection Dosimetry 2011, 144(1-4), 672-674 (Eng) ;