Distribution of non-exchangeable organically bound tritium activities at the surface soil around Qinshan Nuclear Power Plant
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The tritium deposited in the soil formed the non-exchangeable organically bound tritium (NE-OBT). Most of the NE-OBT locates at the surface. In this study, higher NE-OBT activity appeared at the sampling sites in the prevailing wind direction. The distribution of NE-OBT activity in soil particle with different particle size implied that the NE-OBT might originate from soil organic matter. According to the correlation analyses, in the soil with particle size less than 53 μm, the NE-OBT might originate from soil organic matter, and in the soil with particle size between 250 and 2000 μm, it originated from HTO.
KeywordsNon-exchangeable organically bound tritium (NE-OBT) distribution Surface soil Particle size Non-exchangeable organically bound tritium (NE-OBT)/HTO ratio
The authors would like to thank the colleagues from CNNC Nuclear Power Operations Management Co. Ltd for the help sampling soils.
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