Numerical modeling of flow and transport processes in a fractured-porous rock system

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Authors:Baca, R. G.; Arnett, R. C.; King, I. P.
Author Affiliations:Primary:
Rockwell Hanford Oper., Richland, WA, United States
Resour. Manage. Assoc., United States
Source:No.RHO-BWI-SA-113, 15p. Availability: Rockwell Hanford Oper., Richland, WA, United States
Publication Date:1981
Note:In English. 16 refs.
Summary:The theoretical framework of these models is based on the fundamental conservation laws for mass and energy. The rock mass is described as a continuum, whereas large-scale, discrete geohydrologic features are described on a noncontinuum basis. Transport of heat through the water-rock system is modeled in a fully coupled manner with groundwater flow. Migration of dissolved nuclides is modeled by accounting for the transport processes of advection, dispersion/diffusion, sorption, and chain decay. A Galerkin finite-element approach is used in conjunction with a Newton-Raphson method to solve the set of governing equations. The numerical models were applied in a parametric and sensitivity modeling study to evaluate the basic waste isolation characteristics of the Columbia River basalts beneath the Hanford Site, near Richland, Washington. Selected simulation results are presented which show the time-dependent response of the basalt waste isolation system over long-term periods.—Modified report abstract.
Subjects:Advection; Basalts; Diffusion; Engineering geology; Finite element analysis; Fractures; Ground water; Igneous rocks; Isotopes; Mathematical models; Movement; Porous materials; Radioactive decay; Radioactive isotopes; Radioactive waste; Statistical analysis; Surveys; Transport; Volcanic rocks; Waste disposal; Benton County Washington; Franklin County Washington; Grant County Washington; Hanford Site; Richland Washington; United States; Washington; Dispersion; Repositories
Coordinates:N462000 N464500 W1191500 W1195000
Record ID:1983035410
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute.
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