Flow and transport calculations of Yucca Mountain using tough2 and FEHM

摘要

This paper presents simulations of unsaturated groundwater flow and radionclide transport at Yucca Mountain using the numerical codes TOUGH2 and FEHM.The simulations test the proposed methodology for coupling flow and transport in the upcoming Total Systems Performance Assessment-Viability Assessment (TSPA-VA).The simulations also reveal the sensitivity of transport results to different weighting schemes for hydraulic conductivities used in liquid flux calculations.Results indicate that coupling TOUGH2 and FEHM is a viable method for simulating flow andtransport at Yucca Mountain,and modified upstream weighting scheme is proposed to simulate the flow fields.