期刊
APPLIED RADIATION AND ISOTOPES
卷 65, 期 7, 页码 849-857出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2007.01.022
关键词
drinking water; radiation dose; alpha-spectrometry; uranium; radium; Po-210
The radiological quality in some samples of drinking water collected in Italy has been evaluated in the paper. As far as the measured a or beta radionuclides are concerned, the doses for all the analysed samples of drinking water are in the range of 1.80-36.2 PSv yr(-1), all being well below the reference level of the committed effective dose (100 mu Sv yr(-1)) recommended by the WHO. As far as each measured alpha or beta radionuclide is concerned, the dose contributions for most of the analysed water samples are in this order: (210)po > Ra-228 > Ra-226 > U-234 > U-238 > Ra-224 > U-235, and Po-210 and Ra-228 can yield a significant contribution to the doses from the analysed drinking water samples. As far as the elements are concerned, the dose contributions are 48.0 +/- 27.9% from radium, 31.7 +/- 23.1 % from polonium, and 20.3 + 14. 1 % from uranium. The water samples, No. 2, 7, 13, and 15, can lead to a dose of > 10 mu Sv yr(-1) mainly due to the dose contribution from Po-210 and Ra-228, especially water samples No. 2 and 13. The obtained data can provide basic information for consumers and competent authorities regarding the internal exposure risk due to drinking water intake, and can possibly serve as a comparison when evaluating the dose contribution from artificial radionuclides released to the environment as a result of any human practices and accidents in the studied area. (c) 2007 Elsevier Ltd. All rights reserved.
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