Estimation of Radiological Hazards Due to Natural Radionuclides from the Rosterman Gold Mine Tailings, Lurambi, Kakamega, Kenya
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Date
2020
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Radiation Protection Dosimetry
Abstract
Radiological hazards associated with naturally occurring radionuclides in materials from Rosterman gold mine were assessed by
analysis of 30 samples. The gamma-ray spectrometric analysis of tailing samples reported an average activity concentration
of 263 ± 13, 123 ± 6 and 84 ± 4 Bq kg−1 for 40K, 232Th and 226Ra, respectively. The average absorbed dose rate was
124 ± 6 nGy h−1, while the annual effective dose of 0.4 ± 0.02 mSv y−1 for indoor and 0.3 ± 0.01 mSv y−1 for outdoor were
reported. The mean and range of radiological parameters (external and radium equivalent) calculated from the tailing samples
were within the permissible limits and hence mining of gold at Rosterman has no significant radiological health implication on
the miners and the surrounding population.
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Citation
Wanyama, C. K., Masinde, F. W., Makokha, J. W., & Matsitsi, S. M. (2020). Estimation of radiological hazards due to natural radionuclides from the Rosterman gold mine tailings, Lurambi, Kakamega, Kenya. Radiation Protection Dosimetry, 190(3), 324-330. doi:10.1093/rpd/ncaa113