Semianalytical solutions of radioactive or reactive transport invariably-fractured layered media: 1. Solutes

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In this paper, semianalytical solutions are developed for the problem of transport of radioactive or reactive solute tracers through a layered system of heterogeneous fractured media with misaligned fractures. The tracer transport equations in the non-flowing matrix account for (a) diffusion, (b) surface diffusion, (c) mass transfer between the mobile and immobile water fractions, (d) linear kinetic or equilibrium physical, chemical, or combined solute sorption or colloid filtration, and (e) radioactive decay or first-order chemical reactions. The tracer-transport equations in the fractures account for the same processes, in addition to advection and hydrodynamic dispersion. Any number of radioactive decay daughter ... continued below

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Moridis, George J. October 10, 2001.

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In this paper, semianalytical solutions are developed for the problem of transport of radioactive or reactive solute tracers through a layered system of heterogeneous fractured media with misaligned fractures. The tracer transport equations in the non-flowing matrix account for (a) diffusion, (b) surface diffusion, (c) mass transfer between the mobile and immobile water fractions, (d) linear kinetic or equilibrium physical, chemical, or combined solute sorption or colloid filtration, and (e) radioactive decay or first-order chemical reactions. The tracer-transport equations in the fractures account for the same processes, in addition to advection and hydrodynamic dispersion. Any number of radioactive decay daughter products (or products of a linear, first-order reaction chain) can be tracked. The solutions, which are analytical in the Laplace space, are numerically inverted to provide the solution in time and can accommodate any number of fractured and/or porous layers. The solutions are verified using analytical solutions for limiting cases of solute and colloid transport through fractured and porous media. The effect of important parameters on the transport of {sup 3}H, {sup 237}Np and {sup 239}Pu (and its daughters) is investigated in several test problems involving layered geological systems of varying complexity.

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  • Journal Name: Water Resources Research; Journal Volume: 38; Journal Issue: 12; Related Information: Journal Publication Date: 12/20/2002

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  • Report No.: LBNL--45871
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 861176
  • Archival Resource Key: ark:/67531/metadc787151

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  • October 10, 2001

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  • Dec. 3, 2015, 9:30 a.m.

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  • April 1, 2016, 7:50 p.m.

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Moridis, George J. Semianalytical solutions of radioactive or reactive transport invariably-fractured layered media: 1. Solutes, article, October 10, 2001; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc787151/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.