Field studies and modeling of chemical processes in the unsaturated zone
Technical assistance is being provided to Nuclear Materials Safety and Safeguards of the Nuclear Regulatory Commission to evaluate the validity of several guidelines listed in 10 CFR Part 61 for the future burial of low-level radioactive waste. Those guidelines include the requirement that the burial site shall be capable of being modeled. Both laboratory- and field-scale studies are being conducted under unsaturated moisture conditions and under steady-state and unsteady-state flow conditions. This paper reviews the kinds of present experiments in low-level radioactive waste disposal in development at the Los Alamos National Laboratory. Major emphasis is on some of the initial ... continued below
Polzer, W.L. & Fuentes, H.R. January 1, 1985.
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Los Alamos National Laboratory
Place of Publication: New Mexico
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Technical assistance is being provided to Nuclear Materials Safety and Safeguards of the Nuclear Regulatory Commission to evaluate the validity of several guidelines listed in 10 CFR Part 61 for the future burial of low-level radioactive waste. Those guidelines include the requirement that the burial site shall be capable of being modeled. Both laboratory- and field-scale studies are being conducted under unsaturated moisture conditions and under steady-state and unsteady-state flow conditions. This paper reviews the kinds of present experiments in low-level radioactive waste disposal in development at the Los Alamos National Laboratory. Major emphasis is on some of the initial analyses of data for laboratory sorption experiments and for field transport tests. Brief reference is made to leaching and transport studies. Laboratory batch equilibrium sorption studies suggest that adsorption of nonconservative tracers can be described in terms of two empirical constants; one gives an indication of the average K/sub d/ for all adsorption sites and the other gives an indication of the spread of individual K/sub d/'s about the average K/sub d/. This information can be translated into a ''chemical dispersion'' under dynamic flow and equilibrium sorption conditions that is in addition to the traditionally accepted physical dispersion. Laboratory nonequilibrium sorption studies suggest that nonequilibrium models may be needed to model the transport of the nonconservative tracers cobalt and cesium; equilibrium models should be suitable to model strontium transport. Analyses from field-scale studies indicate that conservative tracers can reasonably be modeled with a one-dimensional advective-dispersive equation for steady flow. 12 figs., 1 tab.
NTIS, PC A02/MF A01.
- Alkali Metal Isotopes
- Alkali Metals
- Alkaline Earth Isotopes
- Alkaline Earth Metals
- Bench-Scale Experiments
- Beta Decay Radioisotopes
- Beta-Minus Decay Radioisotopes
- Cesium 137
- Cesium Isotopes
- Cobalt 60
- Cobalt Isotopes
- Days Living Radioisotopes
- Electron Capture Radioisotopes
- Environmental Transport
- Even-Odd Nuclei
- Experimental Data
- Field Tests
- Hours Living Radioisotopes
- Intermediate Mass Nuclei
- Internal Conversion Radioisotopes
- Isomeric Transition Isotopes
- Isotope Applications
- Low-Level Radioactive Wastes
- Mass Transfer
- Mathematical Models
- Medium Temperature
- Minutes Living Radioisotopes
- Numerical Data
- Odd-Even Nuclei
- Odd-Odd Nuclei
- Organic Compounds
- Organic Polymers
- Petroleum Products
- Radioactive Materials
- Radioactive Waste Disposal
- Radioactive Wastes
- Radionuclide Migration
- Separation Processes
- Sorptive Properties
- Strontium 85
- Strontium Isotopes
- Surface Properties
- Tracer Techniques
- Waste Disposal
- Waste Management
- Years Living Radioisotopes 053000* -- Nuclear Fuels-- Environmental Aspects
STI Subject Categories
- 7. annual participants information meeting: DOE Low-Level Waste Management Program, Las Vegas, NV, USA, 3 Oct 1985
Unique identifying numbers for this article in the Digital Library or other systems.
- Other: DE86000794
- Report No.: LA-UR-85-3489
- Report No.: CONF-8510175-1
- Grant Number: W-7405-ENG-36
- Office of Scientific & Technical Information Report Number: 5063928
- Archival Resource Key: ark:/67531/metadc1062007
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Office of Scientific & Technical Information Technical Reports
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- January 1, 1985
Added to The UNT Digital Library
- Jan. 22, 2018, 7:23 a.m.
Description Last Updated
- Feb. 2, 2018, 11:55 a.m.
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Polzer, W.L. & Fuentes, H.R. Field studies and modeling of chemical processes in the unsaturated zone, article, January 1, 1985; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1062007/: accessed January 16, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.