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  • Title: Exposure to 222Rn in ten underground mines in Iran.
    Author: Ghiassi-Nejad M, Beitollahi MM, Fathabadi N, Nasiree P.
    Journal: Radiat Prot Dosimetry; 2002; 98(2):223-5. PubMed ID: 11926373.
    Abstract:
    Concentrations of 222Rn were measured in ten non-uranium underground mines in Iran, including three metal mines and seven coal mines. Two active techniques were applied for these measurements (1) activated charcoal and (2) scintillation cell. A maximum mean concentration of 1.33 kBq.m(-3) was found in the Robat-Karim manganese mine with a hot spot of 12 kBq.M(-3), while the concentration in the Venarge-Qom manganese mine was less than 10 Bq.m(-3), leading to annual effective dose equivalents of 8.3 mSv and (0.06 mSv respectively. The mean concentration levels of 222Rn in coal mines were found to be almost 500 Bq.m(-3), leading to annual effective dose equivalent of 3 mSv.
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