Abstract
The study estimated the radiological exposure levels in a mining area for miners in the Beylikova-Sivrihisar (Turkey) complex ore site containing 238U, 226Ra and 232Th. Sixty samples were collected from the study area based on a geologic map. The radionuclide activities were measured using a 78.5% efficient n-type HPGe detector. The measured mean activities were 1871±38Bqkg-1 for 238U, 1749±5Bqkg-1 for 226Ra, 3467±9Bqkg-1 for 232Th and 309±2Bqkg-1 for 40K. From the measured results, the external effective dose was calculated to be max. 3.80±0.03mSv y-1 (mean: 2.04±0.03mSv y-1) for inside gallery and max. 7.59±0.05mSv y-1 (mean: 4.08±0.05mSv y-1) for outdoor. Additionally, the external exposure index was calculated to be Hex=33.5±0.2(mean: 18.2±0.3) and internal exposure index to be Hin=45.9±0.3 (mean: 22.9±0.4). The results indicate that additional radiation protection measures should be taken during the mining process if an opencast mining is implemented in Beylikova complex ore deposit.
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