Simulation of radionuclide diffusion in a dry storage of spent fuel under accident condition

摘要: Abstract The prediction of radionuclide diffusion is one the indispensable factors for nuclear emergency decision. So far, it still short an accurate simulation in a spent fuel storage. Compared with atmosphere, airflow inside dry-storage always turbulent state ventilation system, and process dry storage very complex. Therefore, choice appropriate model key point to estimate dispersion In this paper, concentration equation consideration room wind field, wall condition features updated simulate four vents. A three-dimensional radioactive obtained based on standard k-e turbulence model. results reveal that combined gives reasonable description under accident so as provide more actual information early consequence assessment.