An extreame disposition method for low-level radioactive wastes using supercritical water (3)
| Autor: | Yoshinobu Shiokawa, Hiroshi Tomiyasu, Ki Chul Park, Yuji Sugita, Hidetsugu Okada, Wataru Sugiyama, Tomoo Yamamura |
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| Rok vydání: | 2005 |
| Předmět: |
Materials science
Trace Amounts Precipitation (chemistry) Radiochemistry Energy Engineering and Power Technology chemistry.chemical_element Radioactive waste Supercritical fluid chemistry.chemical_compound Nuclear Energy and Engineering chemistry Reagent Oxidizing agent Hydroxide Safety Risk Reliability and Quality Waste Management and Disposal Cobalt |
| Zdroj: | Progress in Nuclear Energy. 47:448-453 |
| ISSN: | 0149-1970 |
| DOI: | 10.1016/j.pnucene.2005.05.046 |
| Popis: | Disposition of low-level radioactive wastes has been performed in supercritical water with RuO 2 as a catalyst without the addition of any oxidizing materials. These wastes arose from nuclear power plants etc. , constituting of nonflammable organic materials, such as fire resistant sheeting and rubber gloves. We investigated the distribution behavior of iron and cobalt attached to nonflammable organic materials, in solid, liquid and gas phases during the decomposition of this method. The distributions of these elements under various conditions (initial amounts) were determined by using their radioisotopes as simulated low-level radioactive wastes in order to ease the detection of trace amounts of elements even in solid and gas phases. Iron and cobalt were found only in the solid phase when non-radioactive iron hydroxide was added as a precipitation reagent before the supercritical-water reaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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