Evaluation of Indoor Radon Activity Concentrations and Controls in Dwellings Surrounding the Gold Mine Tailings in Gauteng Province of South Africa

Paballo M. Moshupya (), Seeke C. Mohuba, Tamiru A. Abiye and Ian Korir
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Paballo M. Moshupya: School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa
Seeke C. Mohuba: School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa
Tamiru A. Abiye: School of Geosciences, University of the Witwatersrand, Johannesburg 2050, South Africa
Ian Korir: Centre for Nuclear Safety and Security, National Nuclear Regulator, Centurion 0046, South Africa

IJERPH, 2023, vol. 20, issue 21, 1-19

Abstract: Radon in dwellings is recognized as the primary source of natural radiation exposure to members of the public. In the West Rand District and Soweto in the Gauteng Province (South Africa), indoor radon ( 222 Rn) mapping was carried out to assess the exposure levels of radon in dwellings around gold and uranium mining tailings dams. This study was conducted predominately during warm and cold seasons, using the solid-state nuclear track detectors. In summer months, the indoor radon levels measured in all areas ranged from below the lower limit of detection to 71 Bq/m 3 , with a mean value of 29 Bq/m 3 , whereas in winter, the levels ranged between 11 and 124 Bq/m 3 , with a mean value of 46 Bq/m 3 . Higher indoor radon levels are found in colder months (winter season) than warmer months (summer season). However, no dwellings with indoor radon levels that exceed the WHO (2009) recommended reference level of 100 Bq/m 3 were found, except for one that was constructed directly on soil mixed with tailings material. It is recommended that residents should keep their indoor radon levels low through continuous ventilation so as to minimize the buildup of radon and the likelihood of increased health hazards associated with radon exposure.

Keywords: indoor radon (Rn-222); mine tailings; solid-state nuclear track detectors; South Africa (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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