Three-dimensional numerical simulation of tritium migration in a preselected area of high-level radioactive waste disposal repository

In order to research the nuclide migration behavior in a preselected area of high-level radioactive waste disposal repository in China, theoretic models of groundwater flow and nuclide migration are built, correlative parameter conditions including medium parameters, boundary conditions and initial conditions are ascertained, and three-dimensional numerical simulation of tritium migration is carried out by developing the module of FEMWATER in the software of GMS. The nuclide concentration data in different time and place are obtained and the distribution curves of nuclide concentration along with time at all observation points are also gotten. The simulation results accord with the monitoring results well on the whole, which shows that the simulation is successful.