Rt : Radioactive-retardation-reaction-transport- Program for the Simulation of Radioactive Waste

We present a software-tool for the simulation of a transport and reaction model for a potential waste scenarios of a radioactive waste-disposals. We introduce the complex model for the transport-, reactionand sorption-processes. The model is based on systems of linear convection-diffusiondispersion-reaction equations with equilibrium sorption. The discretisation is done with finite volume discretisation and a reconstruction with higher order polynoms. The convection-reaction term is explicit discretised with embedded analytical solutions. The diffusion-dispersion-term is discretised with implicit methods and the solvers use the BiCGStab with multi-grid methods. We focus us to the simulation of a 2d and 3d test case which we present with different gridand time-step-refinements. The potential waste scenario for 2d and 3d is discussed. At the end we will discuss the further works.