Estimation of Lifetime Fatality Risk from Indoor Radon in Some Offices in a Nigerian University

O. M. Oni ； G. A. Isola ； O. O. Oladapo ； E. A. Oni

《Research Journal of Environmental and Earth Sciences》 4卷2期 (2012/02) Pp. 131-133

並列摘要

This study aims at estimating the lifetime cancer risk from the determination of ^(222)Rn concentration level in some offices in Ogbomoso, Southwestern Nigeria. The measurement of the indoor ^(222)Rn concentration levels at some offices in Ladoke Akintola University of Technology (LAUTECH) Ogbomoso, Nigeria was carried out using an active electronic radon gas detector, safety Pro3 (model HS71512) between February and July 2011. The result of the measurement showed that the average radon concentration is 26.3±4.17Bq/m^3. This value translated to an annual effective dose of 0.13mSv/y and lifetime fatality risk of 9.94×10^(-6). These values which were found to be higher than values reported for some countries were however lower than the world average value and below the recommended action level. Thus, the results of this work have shown that the exposure to indoor radon at the offices considered is of low risk of fatal cancer occurrence due to radon inhalation.

並列關鍵字

Active radon gas detector ； cancer risk ； LAUTECH ； radon inhalation