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KMID : 0364920050300040161
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Journal of Radiation Protection and Research
2005 Volume.30 No. 4 p.161 ~ p.165
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Assessment of the terrestrial gamma radiation dose in Korea
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Choi Seok-Won
Yun Ju-Yong
Kim Chang-Kyu
Rho Byung-Hwan
Lee Jong-Seong
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Abstract
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The gamma-ray dose rates in air at 233 locations in Korea have been determined. The contribution to the gamma-ray dose rates in air due to the presence of {232}Th-series, {238}U-series and {40}K is as follows: 47.3% (36 nGyh {-1}){232}Th-series 14.5% (11 nGyh {-1}) {238}U-series and 38.2% (29 nGyh{-1}) {40}K. The mean gamma-ray dose rate theoretically derived from {232}Th-series, {238}U-series and {40}K was 76{pm}17 nGyh {-1}. This corresponds to an annual effective dose of 410 {mu}Sv and an annual collective dose of 18900 person-Sv for all provinces under study. The results have been compared with other global radiation dose.
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KEYWORD
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natural radiation, gamma-ray dose rate, annual effective dose, annual collective dose, Korea
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