Investigation on boron carbide oxidation for nuclear reactor safety: Experiments in highly oxidising conditions
| Autor: | A. Constant, N. Cocuaud, D. Drouan, D. Jacquemain, C. Dominguez |
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| Přispěvatelé: | Institut de Radioprotection et de Sûreté Nucléaire (IRSN) |
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Partial pressure
Nuclear and High Energy Physics 020209 energy Kinetics Pellets chemistry.chemical_element 02 engineering and technology Activation energy Boron carbide 7. Clean energy complex mixtures law.invention chemistry.chemical_compound Nuclear reactors Flow velocity law Oxidation 0202 electrical engineering electronic engineering information engineering General Materials Science Argon [PHYS]Physics [physics] Kinetic models Chemistry food and beverages Steam partial pressure Atmospheric temperature range Nuclear reactor 021001 nanoscience & nanotechnology humanities Steam Nuclear Energy and Engineering Chemical engineering 13. Climate action Mixtures 0210 nano-technology Nuclear chemistry |
| Zdroj: | Journal of Nuclear Materials Journal of Nuclear Materials, 2008, 374 (3), pp.473-481. ⟨10.1016/j.jnucmat.2007.10.004⟩ |
| DOI: | 10.1016/j.jnucmat.2007.10.004⟩ |
| Popis: | The oxidation kinetics of boron carbide pellets were investigated in steam/argon mixtures in the temperature range 1200-1800 °C for steam partial pressures between 0.2 and 0.8 bar and total flows (steam + argon) between 2.5 and 10 g/min resulting in gas velocities from 1.01 to 5.34 m/s. A kinetic model for boron carbide pellet oxidation depending on temperature, steam partial pressure and flow velocity is obtained. The activation energy of the oxidation process was determined to be 163 ± 8 kJ/mol. The strong influence of temperature and steam partial pressure on the boron carbide oxidation kinetics is confirmed. The obtained data suggest the coexistence of two kinetic regimes, one at 1200 °C and the other at 1400-1800 °C, with different dependence on steam partial pressure. © 2007 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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