Abstract
To ensure the quality of assessment calculations for the geological disposal of high level radioactive waste, it is necessary to simulate substance transportation in the grand water under the detailed configurations. Such large-scale problems are usually computed in parallel environments. Developments of parallel analysis program require a remarkable labor and time, but it can be made easy by utilizing the plug-in function of GeoFEM. In this study, the parallel FEM analysis code for the substance transport simulator in the porous media using GeoFEM was developed.