Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2172/5318373 |
| 报告编号 | ORNL/TM-8990 |
| 来源ID | OSTI_ID: 5318373 |
| Field demonstration of in situ treatment of buried low-level radioactive solid waste with caustic soda and soda ash to immobilize /sup 90/Sr | |
| Spalding, B.P. | |
| 英文摘要 | A low-level radioactive solid waste disposal trench was injected on four occasions with solutions of caustic soda, soda ash, caustic soda, and lime/soda ash, respectively. Because investigations had indicated that /sup 90/Sr could be coprecipitated with soil calcium carbonate by treatment with soda ash, this demonstration was undertaken as a test of its technical feasibility. After concentrations of /sup 90/Sr and water hardness decreased within the intratrench monitoring wells; one well at the foot of the trench decreased from over 100 to a persistent level of less than 10 kBq of /sup 90/Sr per liter. Recharge of /sup 90/Sr from the trench to a sump immediately below was reduced by about 90%. Water hardness and /sup 90/Sr concentrations were strongly correlated through time within each monitoring well, indicating that /sup 90/Sr behaved as a tracer for soil calcium and magnesium. The disappearance of /sup 90/Sr from the trench water, therefore, was an in situ water softening. Soil samples retrieved from the trench indicated that as much as 98% of the total /sup 90/Sr was present as a coprecipitate with calcium carbonate. The hydrologic characterization of this trench indicated an average void space of 41% and an average trench-wall hydraulic conductivity of 3.4 x 10/sup -7/ m/s. Sampling of the trench's discharge contamination plume indicated that it had resulted from a combination of subsurface seepage and bathtub overflow during infrequent periods of intense precipitation. A generic assessment of soda ash treatment indicated that treatment would be most effective for soils of high cation exchange capacity with either low (< 20%) or high (> 80%) basic cation saturation of that cation exchange capacity. |
| 出版年 | 1984 |
| 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 ; GROUND WATER ; RADIONUCLIDE MIGRATION ; RADIOACTIVE WASTE DISPOSAL ; LOW-LEVEL RADIOACTIVE WASTES ; STRONTIUM 90 ; DIFFUSION ; FIELD TESTS ; UNDERGROUND DISPOSAL ; ALKALINE EARTH ISOTOPES ; BETA DECAY RADIOISOTOPES ; BETA-MINUS DECAY RADIOISOTOPES ; ENVIRONMENTAL TRANSPORT ; EVEN-EVEN NUCLEI ; HYDROGEN COMPOUNDS ; INTERMEDIATE MASS NUCLEI ; ISOTOPES ; MANAGEMENT ; MASS TRANSFER ; MATERIALS ; NUCLEI ; OXYGEN COMPOUNDS ; RADIOACTIVE MATERIALS ; RADIOACTIVE WASTES ; RADIOISOTOPES ; STRONTIUM ISOTOPES ; TESTING ; WASTE DISPOSAL ; WASTE MANAGEMENT ; WASTES ; WATER ; YEARS LIVING RADIOISOTOPES 053000* -- Nuclear Fuels-- Environmental Aspects ; 052002 -- Nuclear Fuels-- Waste Disposal & Storage ; 520301 -- Environment, Aquatic-- Radioactive Materials Monitoring & Transport-- Water-- (1987) |
| URL | http://www.osti.gov/scitech/servlets/purl/5318373 |
| 资源类型 | 科技报告 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/263560 |
| 推荐引用方式 GB/T 7714 | Spalding, B.P.. Field demonstration of in situ treatment of buried low-level radioactive solid waste with caustic soda and soda ash to immobilize /sup 90/Sr,1984. |
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