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| Investigation and Assessment of Tritium Concentration of Aquatic Environment Surrounding Haiyang Nuclear Power Plant |
| SU Yin-ping, LI Fu-sheng, LI Hai-liang, et al |
| Institute of Radiation Medicine, Shandong Academy of Medical Sciences, Jinan 250062 China |
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Abstract Objective To investigate tritium concentrations of aquatic environment surrounding Haiyang nuclear power plant,and make a analysis of the influencial factors of the tritium concentration;to assess the accumulated-effective dose of the residents surrounding nuclear power plant.Methods We collected 16 sample points,including surface water,groundwater,drinking water and sea water within 30km surrounding Haiyang nuclear power plant in wet period and dry period.The pretreatment and preparation of samples referred to the recommended methods of the national standards GB 12375-90.The low background liquid scintillation spectrometer is used to measure the tritium concentration.Result The average level of the tritium concentration of water samples was (0.62 ±0.163) Bq·L-1,the range of the tritium concentrations was from 0.27 Bq·L-1 to 0.93 Bq·L-1.The difference of the tritium concentrations between two different periods analyzed by the paired t test was considered statistically significant.(P < 0.05) The orders of the average tritium concentration of various types of water from high to low were surface water,groundwater,drinking water,seawater in wet period,and surface water,drinking water,groundwater,seawater in dry period.The accumulated-effective doses of the infants,adults,children who surrounding nuclear power plant were 0.015μSv·a-1,0.008μSv·a-1,0.007μSv·a-1,respectively.Conclusion The activity concentration of tritium in the aquatic environment 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)(2mSv),the accumulated-effective dose which residents suffered was in background level of radiation.
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Received: 03 January 2011
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