Radiological assessment of gamma and radon dose rates at former uranium mining tunnels in Egypt
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Radiological assessment was carried out at the mining tunnels (El Missikat and EL Aradiya tunnels) in Egypt due to exposure to radon (222Rn), thoron (220Rn) and gamma radiation. 222Rn/220Rn measurements were carried out with two techniques; instantaneous (active) and discriminative (passive) radon and thoron solid-state nuclear track detectors were used for longer representative measurements. The detectors were exposed for a long time inside the tunnels. The results showed that radon and thoron in general, are very high due to non-ventilation drafts inside the tunnels and gamma radiation was low. The total annual effective doses exceeded the permissible limit 20 mSv year−1. According to IAEA recommendations, the two tunnels are regulated and controlled areas. A radiation hazard could be associated with exceptional situations, such as elevated exposures to ionizing radiation at tunnels, so work within these tunnels must be prevented until the application of IAEA regulation for radiation protection standards. The exposure for radon and thoron gases for a long time can damage the body cells and cause cancer.
KeywordsRadon gas U mining Radon Thoron Gamma
Compliance with ethical standards
Conflict of interest
The author declares that there are no conflicts of interest.
- Abu Dief A (1985) Geology of uranium mineralization in El-Missikat area. Eastern Desert, EgyptGoogle Scholar
- Biira S, Kisolo AW, D’ujanga FM (2014) Concentration levels of radon in mines, industries and dwellings in selected areas of Tororo and Busia districts, Eastern Uganda. Adv Appl Sci Res 5:31–44Google Scholar
- El-Tahir MA (1985) Radioactivity and mineralization of granitic rocks of El-Erediya occurrence, Eastern Desert, EgyptGoogle Scholar
- UNSCEAR (2010) Sources and effects of ionizing radiation—exposures of the public and workers from various sources of radiation—UNSCEAR 2008 Report, United Nations PublicationGoogle Scholar