Radionuclide Transport Through Different Routes Near a Deposition Hole for Spent Nuclear Fuel

V-M.S. Pulkkanen[1]

[1]VTT, Technical Research Centre of Finland, Espoo, Finland

Radionuclide transport modeling is a part of the research concerning geological disposal of spent nuclear fuel. Typically, the transport models near a single deposition hole focus on the reactions of nuclides, while the model geometry and the flow of groundwater are often simplified. In this paper, instead, a radionuclide transport model in a detailed 3D geometry with no reactions is introduced. The aim is to study the effects of the geometry and realistic flow fields on the nuclide transport. The groundwater flow is modeled with the continuity equation and Darcy's law, whereas the mass transport problem of a nuclide reduces to a general convection-diffusion problem. This paper focuses on development of the model instead of the final results