Comparative dosimetry for radon and thoron in high background radiation areas in China.
The present study focuses on internal exposure caused by the inhalation of radon and thoron progenies because the internal exposures have not yet been clarified. For their dose assessment, radon, thoron and thoron progeny concentrations were measured by passive monitors over a long period (for 6 months). Consequently, radon, thoron and equilibrium equivalent thoron concentrations were given as 124 ± 78, 1247 ± 1189 and 7.8 ± 9.1 Bq m(-3), respectively. Annual effective doses are estimated to be 3.1 ± 2.0 mSv for radon and 2.2 ± 2.5 mSv for thoron. Total dose are estimated to be 5.3 ± 3.5 mSv a(-1). The present study has revealed that the radon dose was comparable with the thoron dose, and the total dose was ∼2 times higher than the worldwide average.
Graduate School of Health Sciences, Hirosaki University, Hirosaki, Japan.
H
H
Kudo
Institute of Radiation Emergency Medicine Hirosaki University, Hirosaki, Japan tokonami@hirosaki-u.ac.jp.
S
S
Tokonami
Fukushima Medical University, Fukushima, Japan.
Y
Y
Omori
Fukushima Medical University, Fukushima, Japan.
T
T
Ishikawa
Institute of Radiation Emergency Medicine Hirosaki University, Hirosaki, Japan.
K
K
Iwaoka
National Institute of Radiological Sciences, Chiba, Japan.
S K
SK
Sahoo
National Institute for Fusion Science, Toki, Japan.
N
N
Akata
Graduate School of Health Sciences, Hirosaki University, Hirosaki, Japan.
M
M
Hosoda
Institute of Radiation Emergency Medicine Hirosaki University, Hirosaki, Japan.
P
P
Wanabongse
Graduate School of Health Sciences, Hirosaki University, Hirosaki, Japan.
C
C
Pornnumpa
National Institute of Radiological Protection, Beijing, China.
Q
Q
Sun
National Institute of Radiological Protection, Beijing, China.
X
X
Li
Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.
S
S
Akiba
D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor; D001417:Background Radiation; D002681:China; D006801:Humans; D000069079:Radiation Exposure / Q000032:analysis*; D011834:Radiation Monitoring / Q000379:methods*; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
D000396:Air Pollutants, Radioactive; D011886:Radon