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Numerical Estimates of Seasonal Changes of Possible Radionuclide Dispersion at the Kori Nuclear Power Plants

고리 원자력 발전 단지 사고 발생에 따른 방사능 물질 확산 가능성의 계절적 특성 연구

  • Received : 2018.04.24
  • Accepted : 2018.05.05
  • Published : 2018.06.30

Abstract

To establish initial response scenarios for nuclear accidents around the Kori nuclear power plants, the potential for radionuclide diffusion was estimated using numerical experiments and statistical techniques. This study used the numerical model WRF (Weather Research and Forecasting) and FLEXPART (Flexible Particle dispersion model) to calculate the three-dimensional wind field and radionuclide dispersion, respectively. The wind patterns observed at Gijang, near the plants, and at meteorological sites in Busan, were reproduced and applied to estimates of seasonally averaged wind fields. The distribution of emitted radionuclides are strongly associated with characteristics of topography and synoptic wind patterns over nuclear power plants. Since the terrain around the power plants is complex, estimates of radionuclide distribution often produce unexpected results when wind data from different sites are used in statistical calculations. It is highly probable that in the summer and autumn, radionuclides move south-west, towards the downtown metropolitan area. This study has clear limitations in that it uses the seasonal wind field rather than the daily wind field.

Acknowledgement

Supported by : 부산대학교

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