Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/6258698 |
| 报告编号 | PNL-3877; UMT-0203 |
| 来源ID | OSTI_ID: 6258698 |
| Simulation of water flow and retention in earthen-cover materials overlying uranium mill tailings | |
| Simmons, C.S.; Gee, G.W. | |
| 英文摘要 | The water retention characteristics of a multilayer earthen cover for uranium mill tailings were simulated under arid weather conditions common to Grand Junction, Colorado. The multilayer system described in this report consists of a layer of wet clay/gravel (radon barrier), which is separated from a surface covering of fill soil by a washed rock material used as a capillary barrier. The capillary barrier is designed to prevent the upward migration of water and salt from the tailings to the soil surface and subsequent loss of water from the wet clay. The flow model, UNSATV, described in this report uses hydraulic properties of the layered materials and historical climatic data for two years (1976 and 1979) to simulate long-term hydrologic response of the multilayer system. Application of this model to simulate the processes of infiltration, evaporation and drainage is described in detail. Simulations over a trial period of one relatively wet and two dry years indicated that the clay-gravel layer remained near saturation, and hence, that the layer was an effective radon barrier. Estimates show that the clay-gravel layer would not dry out (i.e., revert to drying dominated by isothermal vapor-flow conditions) for at least 20 years, provided that the modeled dry-climate period continues. |
| 出版年 | 1981 |
| 报告类型 | Technical Report |
| 语种 | 英语 |
| 国家 | 美国 |
| 来源学科分类 | 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS ; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; 54 ENVIRONMENTAL SCIENCES ; CLAYS ; RADIONUCLIDE MIGRATION ; RETENTION FUNCTIONS ; MILL TAILINGS ; COVERINGS ; FLOW MODELS ; ROCKS ; COLORADO ; ENVIRONMENTAL TRANSPORT ; EVAPORATION ; HYDRAULICS ; SIMULATION ; SOILS ; SORPTION ; SORPTIVE PROPERTIES ; WATER ; FLUID MECHANICS ; FUNCTIONS ; HYDROGEN COMPOUNDS ; MASS TRANSFER ; MATHEMATICAL MODELS ; MECHANICS ; MINERALS ; NORTH AMERICA ; OXYGEN COMPOUNDS ; PHASE TRANSFORMATIONS ; ROCKY MOUNTAIN REGION ; SOLID WASTES ; SURFACE PROPERTIES ; TAILINGS ; USA ; WASTES 053000* -- Nuclear Fuels-- Environmental Aspects ; 052002 -- Nuclear Fuels-- Waste Disposal & Storage ; 510301 -- Environment, Terrestrial-- Radioactive Materials Monitoring & Transport-- Soil-- (-1987) |
| URL | http://www.osti.gov/scitech/servlets/purl/6258698 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/263143 |
| 推荐引用方式 GB/T 7714 | Simmons, C.S.,Gee, G.W.. Simulation of water flow and retention in earthen-cover materials overlying uranium mill tailings,1981. |
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