Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8080273 | Journal of Environmental Radioactivity | 2018 | 6 Pages |
Abstract
The NE-OBT (Non-Exchangeable Organically Bound Tritium) in the soil plays a significant role in tritium migration and transformation. In order to further understand the NE-OBT activity in the soil, the particle size, vertical profile and spatial distribution of the NE-OBT activities in the soil were determined around the Qinshan Nuclear Power Plant (NPP) in China. The experimental results indicated that the NE-OBT preferred to concentrate in the soil particle sizes of 53-250â¯Î¼m within the soil depth of 5â¯cm-25â¯cm. The NE-OBT activity showed significantly vertical variations, however, its largest activity did not appear at the surface soil (0-5â¯cm). Meanwhile, the NE-OBT had a significant spatial distribution, its activity decreased with the increasing distance from the NPP, especially from the HWRs. In this study, the NE-OBT activities have no significant relationship to the organic matter content in the soil. But the vertical profile distribution of the NE-OBT activity has a strong correlation with the NE-OBT/HTO ratio in the soil, which reflect the capability of living organisms converting HTO into NE-OBT. According to these analyses, we supposed that the NE-OBT in the soil may be derived from the microbial transformation of HTO.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
Qin Zhang, Lin Du, Zhong-qin Dai, Yu-hua Ma, Lai-lai Qin, Ke Deng, Zhao-wei Ma, Guo Yang, Jia-yu Liu, Wei Liu,