出版社：The International Institute for Science, Technology and Education (IISTE)
摘要：In this work liquid scintillation analysis was used to measure the concentration of 222 Rn in three sources of water around Ririwai Artisanal Tin mine. The annual effective dose due to 222 Rn concentration in surface water source and Domestic water were also determined. The result shows that the tailing bearing water has the highest 222 Rn concentration of 3.04±0.14 Bq/L followed by surface water source with 222 Rn concentration of 2.51±0.13 Bq/L while the Domestic water has the lowest 222 Rn concentration of 2.23±0.11 Bq/L. The results also indicated that the annual effective dose due to the 222 Rn concentration is higher in surface water with 13.05±0.55 mSv/year than in Domestic water with 11.11 ± 0.44mSv/year. The mean 222 Rn concentration obtained in this work is lower than 10.00Bq/L recommended by WHO and UNSCEAR. Also in this study the annual effective dose obtained is lower than the maximum permissible of 0.1mSv/year recommended by UNSCEAR.
关键词：Radionuclide; activity concentration and annual effective dose
