Mathematical model for evaluating the suitability of a low-level radioactive waste site [electronic resource].

Published:: Argonne, Ill. : Argonne National Laboratory, 1982.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: Pages: 24 : digital, PDF file
Additional Creators:: Argonne National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

A mathematical model intended to study the one-dimensional transport of radionuclides in a non-homogeneous soil system under saturated-unsaturated and isothermal conditions is presented. The model is composed of two modules: the first to calculate the pressure distribution enabling one to compute velocities and soil moisture; the second to calculate the migration of species by considering the major processes associated with the transport phenomena of a dissolved substance in porous media, i.e., advection, mechanical dispersion, molecular diffusion, radioactive decay, and sorption, assuming a linear equilibrium isotherm. The numerical method of solving both flow and solute equations used here is the finite-element method based on the weighted residual technique. The flow equation is solved by the Bubnov-Galerkin method. The solute equation is solved by a Petrov-Galerkin type method. The model allows for a variety of boundary conditions; e.g., infiltration, drainage and/or evaporation. A test case involving the movement of a non-reacting ionic species is used to validate the model. Use of the model is illustrated by the analysis of the movement Sr-90 and Cs-137 and H-3 (as water) from a low-level solid-waste disposal trench subject to a steady rate of rainfall.

Report Numbers:

E 1.99:conf-820303-44
conf-820303-44

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Note:

Published through SciTech Connect.
02/01/1982.
"conf-820303-44"
"DE83008659"
Waste management conference, Tucson, AZ, USA, 8 Mar 1982.
Gureghian, A.B.; Sedlet, J.

Funding Information:

W-31-109-ENG-38

View MARC record | catkey: 14150434