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In this study, concentrations of tritiated water(HTO) and non-exchangeable organically bound tritium(NE-OBT) and the NE-OBT/HTO ratios were determined in soil around Qinshan Nuclear Power Plant(NPP), Zhejiang, China, and their vertical profile and spatial distribution were investigated. Results showed variations in both the HTO and NE-OBT concentrations in the vertical profile. The HTO concentrations generally decreased firstly and then increased with the increasing depths, but the trend was not significant. The NE-OBT concentrations in the surface soils(0–5 cm) were considerably lower than those in the deep soils(5–25 cm) at all the sites. The NE-OBT/HTO ratios also show a variable vertical profile, initially increasing and then decreasing with increasing soil depth.Both the HTO and NE-OBT concentrations decreased with the increasing distance to the HWRs in deep soil layers(5–25 cm), revealing that the released tritium from the NPP affected the spatial distribution.
In this study, the concentrations of tritiated water (HTO) and non-exchangeable organically bound tritium (NE-OBT) and the NE-OBT / HTO ratios were determined in soil around Qinshan Nuclear Power Plant (NPP), Zhejiang, China, and their Results showed variations in both the HTO and NE-OBT concentrations in the vertical profile. The HTO concentrations generally decreased first and then increased with the increasing depths, but the trend was not significant. The NE-OBT concentrations in the surface soils (0-5 cm) were considerably lower than those in the deep soils (5-25 cm) at all the sites. The NE-OBT / HTO ratios also show a variable vertical profile, initially increasing and then then decreasing with increasing soil depth.Both the HTO and NE-OBT concentrations decreased with the increasing distance to the HWRs in deep soil layers (5-25 cm), revealing that the released tritium from the NPP affected the spatial distribution.