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| Investigation and Analysis of Strontium Concentration of Drinking-water Surrounding Haiyang Nuclear Power Plant |
| YANG Xin1,2, CHEN Ying-min1, XU Jia-ang1, ZHANG Lin1 |
1. Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 250062 China;
2. School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences |
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Abstract Objective To investigate strontium concentrations of Drinking-water surrounding Haiyang nuclear powerplant, and make a analysis of the influencial factors of the strontium concentration; to assess the accumulated-effective dose of the residents surrounding nuclear power plant. Methods We choose 10 sample points, including surface water、groundwater and drinking water within 30 km surrounding Haiyang nuclear power plant in wet period and dry period,collecting 87 samples for all. The pretreatment and preparation of samples referred to the recommended methods of the national standards (GB 12375-90). The FJ2603G low background liquid β-spectrometer is used to measure the strontium concentration. Results The average level of the strontium concentration of water samples was (4.96 ±1.6) mBq·L-1,the range of the strontium concentrations was from 1.21~9.12 mBq·L-1. The difference of the strontium concentrations between two different periods analyzed by the paired t-test was considered non-statistically significant(P > 0.05). The orders of the average strontium concentration of various hydrographic period from high to low in drought period:tap water > ground water > surface water,as groundwater > tap water > surface water in high flow period. The accumulated-effective doses of groundwater、tap water、surface water which surrounding nuclear power plant were 0.104、0.103、0.095 μSv·a-1, respectively. Conclusion The activity concentration of strontium in the drinking-water surrounding Haiyang nuclear power plant was at the lower level than that of others'; according to the limited value that is regulated by basic standards for protection against ionizing radiation and fo the safety of radiation sources(GB 18871-2002) (1 mSv),the accumulated-effective dose which residents suffered was in background level of radiation.
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Received: 27 March 2014
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