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http://dx.doi.org/10.1016/j.net.2017.10.002

Characteristics of regional scale atmospheric dispersion around Ki-Jang research reactor using the Lagrangian Gaussian puff dispersion model  

Choi, Geun-Sik (Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute)
Lim, Jong-Myoung (Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute)
Lim, Kyo-Sun Sunny (Environmental Radioactivity Assessment Team, Korea Atomic Energy Research Institute)
Kim, Ki-Hyun (Department of Civil & Environmental Engineering, Hanyang University)
Lee, Jin-Hong (Department of Environmental Engineering, Chungnam National University)
Publication Information
Nuclear Engineering and Technology / v.50, no.1, 2018 , pp. 68-79 More about this Journal
Abstract
The Ki-Jang research reactor (KJRR), a new research reactor in Korea, is being planned to fulfill multiple purposes. In this study, as an assessment of the environmental radiological impact, we characterized the atmospheric dispersion and deposition of radioactive materials released by an unexpected incident at KJRR using the weather research and forecasting-mesoscale model interface program-California Puff (WRF-MMIF-CALPUFF) model system. Based on the reproduced three-dimensional gridded meteorological data obtained during a 1-year period using WRF, the overall meteorological data predicted by WRF were in agreement with the observed data, while the predicted wind speed data were slightly overestimated at all stations. Based on the CALPUFF simulation of atmospheric dispersion (${\chi}/Q$) and deposition (D/Q) factors, relatively heavier contamination in the vicinity of KJRR was observed, and the prevailing land breeze wind in the study area resulted in relatively higher concentration and deposition in the off-shore area sectors. We also compared the dispersion characteristics between the PAVAN (atmospheric dispersion of radioactive release from nuclear power plants) and CALPUFF models. Finally, the meteorological conditions and possibility of high doses of radiation for relatively higher hourly ${\chi}/Q$ cases were examined at specific discrete receptors.
Keywords
Atmospheric Dispersion of Radioactive Materials; California Puff; Ki-Jang Research Reactor; weather research and forecasting;
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