Spatiotemporal distribution of the atmospheric 14C around Ningde NPP. (October 2022)

• Record Type: Journal Article
• Authors: Huang, Yan-Jun; Sun, Xue-Feng; Yang, Zong-Zhen; Lin, Ming-Gui; Guo, Gui-Yin; Tao, Nai-Gui
• Is Part Of: Journal of environmental radioactivity. Volume 251/52(2022)
• Publication Date: 2022-10
• Subjects: Ningde nuclear power plant -- Environmental radiation monitoring -- Atmospheric 14C; Radioactivity -- Periodicals; Radiation, Background -- Periodicals; Radioecology -- Periodicals; Radioactive pollution -- Periodicals; Environmental Pollutants -- Periodicals; Radioactive Pollutants -- Periodicals; Radioactivity -- Periodicals; Radioécologie -- Périodiques; Pollution radioactive -- Périodiques; Fond de rayonnement -- Périodiques; 539.752
• DOI: 10.1016/j.jenvrad.2022.106958
• Languages: English
• ISSNs: 0265-931X

Abstract

Abstract: In this paper, the sampling and monitoring methods of atmospheric 14 C around Ningde NPP were presented, and the variations and trends during 2013–2021 were statistically analyzed and comparatively studied with worldwide reported values around NPPs. Meanwhile, the correlation study with the gaseous effluent emission amount from Ningde NPP was analyzed, and the spatial distribution of the atmospheric 14 C around Ningde NPP was simulated with the atmospheric release based on the long-term meteorological parameters with the plume diffusion model. It was shown that the average specific activity of atmospheric 14 C at each sampling site ranged from 229 to 230 mBq/gC, and the weak evidence of influence on the nearest sampling site from the release of the NPP could be observed. Seasonal variations of 14 C specific activity were analyzed, and it was shown that, except for the site 1.7 km from the NPP, the specific activity of the atmospheric 14 C was higher in summer and autumn and lower in winter and spring. Besides, it was shown that the excess 14 C for long-term monitoring results around the NPP was consistent with the simulated values on the order of magnitude. Graphical abstract: Image 1 Highlights: Trends of specific activities of atmospheric 14 C around Ningde NPP were statistically analyzed and comparatively studied. A slight correlation between the 14 C level in the nearby sites and the monthly emissions to air was observed. Weak seasonal trends of the atmospheric 14 C were analyzed with the control site. The long-term monitoring values are in agreement with the simulated values on the order of magnitude.