To estimate annual average concentrations in Korean dwellings and the effective dose to the general public, nationwide surveys on radon were conducted in 1989, 1999-2000 and 2002-2005. The total number of dwellings was about 5600. A survey of thoron and its decay products was also conducted in 2002-2005. In 2008-2009, a new radon survey in 1100 public buildings was conducted. The annual arithmetic (AM) and geometric (GM) means of indoor radon concentration in total were 62.1 ± 66.4 and 49.0 ± 1.9 Bq m(-3), respectively. The annual AM and GM means of indoor thoron concentrations were 40.4 ± 56.0 and 10.7 ± 2.9 Bq m(-3), respectively. The radon and thoron concentrations in detached houses were much higher than those in apartments. The locations of the high radon or thoron houses seem to be correlated with the concentrations of their parent nuclides in surface soil. The mean individual doses of radon and thoron were calculated to be 1.65 and 0.17 mSv y(-1), respectively.

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Radon Measurement by Alpha Particle Track Method

National radon survey in Korea.

ABDULLAH, A.; FAZAL-UR-REHMAB (Atomic Energy Minerals Center, Lahore (Pakistan)): Selection of most appropriate gamma-ray peak for the estimation of thorium in natural rocks/ores samples. (English). p. 419-426. In: HANIF, J.; QUADEER, R. (eds.). Pakistan Atomic Energy Commission, Islamabad (Pakistan). Directorate of Nuclear Safety and Radiation Protection. Spectroscopy for material analysis. Islamabad (Pakistan). Scientific Information Division. PINSTECH P.O. Nilore Islamabad Pakistan. 1995. 512 p. [2. National Symposium on Modern Trends in Contemporary Chemistry. Islamabad (Pakistan). 4-6 Apr 1995]. (RN 27:073919).

Radon Measurement by Alpha Particle Track Method

Citations

National radon survey in Korea.

Environmental radiochemistry and radioactivity

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