Exposure to 222Rn in ten underground mines in Iran.
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.
Ghiassi-Nejad
M
M
National Radiation Department, Iranian Nuclear Regulatory Authority, Tehran. ghiassi@mailcity.com
Beitollahi
M M
MM
Fathabadi
N
N
Nasiree
P
P
D000327:Adsorption; D000396:Air Pollutants, Radioactive / Q000032:analysis*; D002606:Charcoal; D003031:Coal; D007492:Iran; D007854:Lead; D008345:Manganese; D008906:Mining; D016273:Occupational Exposure; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods; D011886:Radon / Q000032:analysis*; D012588:Scintillation Counting
D000396:Air Pollutants, Radioactive; D003031:Coal; D002606:Charcoal; D007854:Lead; D008345:Manganese; D011886:Radon