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http://dx.doi.org/10.7733/jnfcwt.2019.17.1.1

Study of Soil Erosion for Evaluation of Long-term Behavior of Radionuclides Deposited on Land  

Min, Byung-Il (Korea Atomic Energy Research Institute)
Yang, Byung-Mo (Korea Atomic Energy Research Institute)
Kim, Jiyoon (Korea Atomic Energy Research Institute)
Park, Kihyun (Korea Atomic Energy Research Institute)
Kim, Sora (Korea Atomic Energy Research Institute)
Lee, Jung Lyul (Sungkyunkwan University)
Suh, Kyung-Suk (Korea Atomic Energy Research Institute)
Publication Information
Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT) / v.17, no.1, 2019 , pp. 1-13 More about this Journal
Abstract
The accident at the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) resulted in the deposition of large quantities of radionuclides over parts of eastern Japan. Radioactive contaminants have been observed over a large area including forests, cities, rivers and lakes. Due to the strong adsorption of radioactive cesium by soil particles, radioactive cesium migrates with the eroded soil, follows the surface flow paths, and is delivered downstream of population-rich regions and eventually to coastal areas. In this study, we developed a model to simulate the transport of contaminated sediment in a watershed hydrological system and this model was compared with observation data from eroded soil observation instruments located at the Korea Atomic Energy Research Institute. Two methods were applied to analyze the soil particle size distribution of the collected soil samples, including standardized sieve analysis and image analysis methods. Numerical models were developed to simulate the movement of soil along with actual rainfall considering initial saturation, rainfall infiltration, multilayer and rain splash. In the 2019 study, a numerical model will be used to add rainfall shield effect by trees, evaporation effect and shield effects of surface water. An eroded soil observation instrument has been installed near the Wolsong nuclear power plant since 2018 and observation data are being continuously collected. Based on these observations data, we will develop the numerical model to analyze long-term behavior of radionuclides on land as they move from land to rivers, lakes and coastal areas.
Keywords
Sediment transport; Soil erosion numerical modeling; Rainfall; Image processing analysis; Sieve analysis;
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