[1M01-04] Atmospheric Dispersion

[1M01] Performance evaluation of atmospheric dispersion model ensemble for plume arrival prediction performance near the nuclear power plant

*Yusaku Kiriyama¹, Hiromi Yamazawa¹, Jun Moriizumi¹ (1. Nagoya Univ.)

Keywords:FDNPP accident, Atmospheric radioactivity concentration, Emergency application

Using the calculation results of multiple atmospheric dispersion models, we examined the method of predicting the arrival of plumes at locations near the nuclear site at the time of the nuclear accident. Using the calculation results of nine models submitted to the international model comparison project, ensemble mean and safety time margin were introduced to predict plume arrival at four locations within the area corresponding to UPZ, which is about 30 km from the NPP.