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| Hygienic Evaluation and the Effective Annual Dose Level of Residents Caused by the Well Water Which Gross α Activity Being Beyond the National Standard |
| ZHAO Xin-Chun, MA Yi-Long, LEI Jia-Jie, QIN Zhi-Ying, ZHOU Yan, XIE Ping |
| Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028 China |
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Abstract Objective To estimate the effective radiation annual dose level of residents caused by the well which gross α activity is beyond the national standard,and evaluate the health affection on residents that ingesting the well water consistently. Methods Estimates of the effective annual dose and evaluate of the health effect by using the related knowledge of radiation dosimetry. Results If residents drink the well water for Long-term,the effective annual dose they accumulated ranges for 0.22~0.80 mSv/a and the mean value is 0.44 mSv/a, single radionuclide 226Ra and the contribution to the annual dose is estimated to be 0.10~0.35 mSv/a which were higher than the drinking water guidance level 0.1mSv/a. Conclusion The content of 226Ra is high in the well and exceeds the guidance level of radioactive nuclide concentration recommended by WHO on health effects caused by drinking water. 226Ra is a highly toxic radioactive species. If residents drinking it for long-term it will cause hazards on their health.
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Received: 25 April 2016
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