An analysis of the radionuclide diffusion rule at a radioactive site

Abstract

To master the microfield transmission and diffusion law of radionuclides in a nuclear accident in a radioactive operating place, two typical diffusion models of radionuclides under ventilation and exhaust conditions are established by using the computational fluid dynamics (CFD) modeling method. The simulation results show that the directions of transmission and diffusion, as well as the range of atmospheric dispersion factors, are greatly influenced by various radionuclides and different ventilation and exhaust conditions in a microfield environment. The emergency response personnel should take various protective measures to effectively reduce the personal effective dose. The CFD modeling method could effectively simulate the transmission and diffusion of the radionuclides in a microfield environment.