COCOSYS is being developed and validated for the comprehensive simulation of severe accident propagation in containments of light water reactors.

steam concentration in konvoi type reactor calculated by COCOSYS

This system is to allow the simulation of all relevant phenomena, containment systems and conditions during the course of design basis accidents and severe accidents. In COCOSYS, mechanistic models are used as far as possible for analysing the physical and chemical processes in containments. Essential interactions between the individual processes, like e.g. between thermal hydraulics, hydrogen combustion as well as fission product and aerosol behaviour, are treated in a comprehensive way.





With such a detailed approach, COCOSYS is not restricted to relevant severe accident phenomena, but will also be able to demonstrate interactions between these phenomena as well as the overall behaviour of the containment.