Laboratory stabilization/solidification of tank sludges: GAAT, OHF, and combined tank sets
| Autor: | C.H. Mattus, R.D. Spence |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Conservation of Natural Resources
Environmental Engineering chemistry.chemical_element Management Monitoring Policy and Law engineering.material Waste Disposal Fluid Selenium Metals Heavy Thallium Resource Conservation and Recovery Act Waste Management and Disposal Nuclear Physics Waste management business.industry Grout Environmental engineering Radioactive waste General Medicine Oak Ridge National Laboratory Mercury (element) Waste treatment chemistry Facility Design and Construction Radioactive Waste Storage tank engineering Laboratories business Sludge |
| Zdroj: | Journal of Environmental Management. 70:203-214 |
| ISSN: | 0301-4797 |
| DOI: | 10.1016/j.jenvman.2003.12.004 |
| Popis: | Highly radioactive, mixed-waste sludges that have been collected at Oak Ridge over several decades are being combined for treatment and disposal. Stabilization of the sludges in the different tank sets was tested prior to the proposed combination and treatment. This paper, which follows a previous article on the Melton Valley Storage Tank/Bethel Valley Evaporator Storage Tank set, documents the testing of the Gunite and Associated Tank and Old Hydrofracture Facility tank sets, as well as the combined sludges of all the Oak Ridge National Laboratory tank sets; the third paper on this subject will discuss efforts to maximize the sludge loading. The grout formulations were tested in the laboratory with surrogates. A wet-sludge loading of 60 wt% resulted in strong wasteforms with no free water and gave a volume increase of about 30–40 vol%. The Resource Conservation and Recovery Act metals included in the surrogate testing were silver, cadmium, chromium, lead, selenium, thallium, zinc, and mercury. The grout formulations stabilized these metals within the Universal Treatment Standards limits. In addition, a grout leachability index of about 10.0–12.0 was measured for both 85Sr and 137Cs, meeting the recommended requirement of >6.0. |
| Databáze: | OpenAIRE |
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