Preliminary Rate Expressions for Analysis of Radionuclide Migration Resulting from Fluid Flow Through Jointed Media [chapter]

Kenneth L. Erickson
1980 Scientific Basis for Nuclear Waste Management  
f$& A theoretical and experimental basis is being developed for analysis of radionuclide transport in jointed geologic media. Batch equilibration end rate experiments involving samples of Eleana argillite and tertiary silicic tuffs in contact with solu tions containing Cs, Sr, or ?m indicated that rost radionuc?-desorptior. '.-.as associated with the surfaces of very snail intergranular regions and that the rate of sorption was controlled by diffusion of the nuclides into such regions. Based on
more » ... h regions. Based on these ex perimental results, the continuity equations for radionuclides in the mobile and immobile phases were reduced to a model analogous to Rosen'c equations for packed beis and vere solved similarly. U..ir.~ the model and experimental data, limited radionuclide-transport analyses were made which indicated that important parameters con trolling transport include the intergranulsr porosity and njelide penetration depth, fracture plate spacing and length, fluid velocity, _ and sorption distribution coefficient. Many of these parameters represent physical quantities or processes which can be quantified y'/yl^ the laboratory. However, fluid velocities and fracture plate sp«eir.gs and lengths must be obtained from the field, and methods must be developed to establish reliable bounds for such field-determined parameters.
doi:10.1007/978-1-4684-3839-0_87 fatcat:fnajzanx2bde3ghdtptmgy4jhe