芬兰钻井水中镭-226和镭-228的活度浓度。
Activity concentrations of 226Ra and 228Ra in drilled well water in Finland.
作者信息
Vesterbacka P, Turtiainen T, Heinävaara S, Arvela H
机构信息
STUK-Radiation and Nuclear Safety Authority, PO Box 14, 00881 Helsinki, Finland.
出版信息
Radiat Prot Dosimetry. 2006;121(4):406-12. doi: 10.1093/rpd/ncl067. Epub 2006 Jun 15.
The activity concentrations of (226)Ra and (228)Ra in drinking water were determined in water samples from 176 drilled wells. (226)Ra activity concentrations were in the range of <0.01-1.0 Bq l(-1) and (228)Ra activity concentrations in the range of <0.03-0.3 Bq l(-1). The mean activity concentration of (226)Ra and (228)Ra were 0.041 and 0.034 Bq l(-1), respectively. High radium activity concentrations in drinking water were rare. Only 2-4% of the drilled wells exceeded a (226)Ra concentration of 0.5 Bq l(-1) and 1-2% of the wells exceeded a (228)Ra concentration of 0.2 Bq l(-1). These are the activity concentrations that cause a 0.1 mSv annual effective dose for users of drinking water. The maximum annual effective doses from (226)Ra and (228)Ra for users of drilled wells were 0.21 mSv, and 0.16 mSv respectively. The elevated activity concentrations of (226)Ra and (228)Ra did not occur simultaneously in the same groundwaters and the correlation between (226)Ra and (228)Ra was small.
测定了176口钻井水样中饮用水中（226）镭和（228）镭的活度浓度。（226）镭的活度浓度范围为<0.01 - 1.0 Bq l⁻¹，（228）镭的活度浓度范围为<0.03 - 0.3 Bq l⁻¹。（226）镭和（228）镭的平均活度浓度分别为0.041和0.034 Bq l⁻¹。饮用水中镭活度浓度高的情况很少见。只有2 - 4%的钻井中（226）镭浓度超过0.5 Bq l⁻¹，1 - 2%的井中（228）镭浓度超过0.2 Bq l⁻¹。这些是会给饮用水使用者带来0.1 mSv年有效剂量的活度浓度。钻井使用者从（226）镭和（228）镭获得的最大年有效剂量分别为0.21 mSv和0.16 mSv。（226）镭和（228）镭的活度浓度升高并非同时出现在同一地下水中，且（226）镭与（228）镭之间的相关性较小。
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