Sensitivity analysis of integrated radionuclide transport based on a three-dimensional geochemical/geophysical model
- Los Alamos National Lab., NM (United States)
This report presents preliminary transport calculations for radionuclide movement at Yucca Mountain. These calculations are used to study the sensitivity of radionuclide migration to uncertainties in several factors that affect transport through porous media. These factors include spatial distribution of sorption coefficients, recharge rate, dispersivity length scale, radionuclide species, and source term. The simulations were run with TRACRN (Travis and Birdsell), a finite-difference porous flow and radionuclide transport code developed for the Yucca Mountain Site Characterization Project. Approximately 30,000 nodes are used to represent the unsaturated and saturated zones underlying the potential repository in three dimensions. Transport calculations for {sup 99}Tc, {sup 135}Cs, and {sup 129}I are presented. Calculations such as these are used to study the effectiveness of the site`s geochemical barriers at a mechanistic level, to determine the sensitivity of radionuclide transport to various transport mechanisms and parameters, and to help guide the geochemical site characterization program. 12 refs., 41 figs., 1 tab.
- Research Organization:
- Los Alamos National Lab., NM (United States)
- OSTI ID:
- 139667
- Report Number(s):
- LA--12325-C; CONF-9009350--; ON: DE92041241
- Country of Publication:
- United States
- Language:
- English
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