学術雑誌論文 COMPARATIVE DOSIMETRY FOR RADON AND THORON IN HIGH BACKGROUND RADIATION AREAS IN CHINA

H.Kudo  ,  Tokonami, S.  ,  Omori, Y.  ,  Ishikawa, T.  ,  Iwaoka, K.  ,  Sahoo, S.K.  ,  Akata, N.  ,  M.Hosoda

167 ( 1-3 )  , pp.155 - 159 , 2015-11 , Oxford University Press
ISSN:0144-8420
内容記述
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 concen- trations were given as 124 + 78, 1247 + 1189 and 7.8 + 9.1 Bq m23, 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 a21. 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.

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