Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2013, Volume 16, Issue 1

Local Atmospheric Dispersion Assessment During a Potential Candu Severe Accident

Abstract

After nuclear power plants (NPPs) accidents in Cernobyl and Fukushima the radioactive plume has dispersed throughout the world, thus confirming the importance of evaluation the risk of the radioactive hazard  with respect to the public health. Although many numerical or mathematical dispersion models have been developed over time, they have various limitations in representing the real situation. It is, therefore, essential to reduce the sources of model uncertainties coming from various factors such as source intensity, the dispersion model or meteorological input data. The objective of this paper was to assess an advanced Gaussian Puff model – Atmospheric Dispersion Modeling System (ADMS) by comparison with a CFD (Computational Fluid Dynamics) Lagrange Particle Tracking (LPT) method and to use it for local scale dispersion studies of fugitive hazardous emissions. The source terms were established on the basis of the accident spectrum postulated in Final Safety Analysis Report for a CANDU6 NPP.