On the melting behaviour of uranium/plutonium mixed dioxides with high-Pu content: A laser heating study
| Autor: | M. Rini, N. Dupin, F. De Bruycker, Christine Guéneau, R.J.M. Konings, Dario Manara, Rachel Eloirdi, K. Boboridis |
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| Rok vydání: | 2011 |
| Předmět: |
010302 applied physics
Nuclear and High Energy Physics Controlled atmosphere Argon Analytical chemistry Mineralogy chemistry.chemical_element 02 engineering and technology Solidus Liquidus 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Plutonium Nuclear Energy and Engineering chemistry 13. Climate action 0103 physical sciences Melting point General Materials Science 0210 nano-technology Energy source MOX fuel |
| Zdroj: | Journal of Nuclear Materials. 419:186-193 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2011.08.028 |
| Popis: | The melting behaviour of mixed uranium–plutonium dioxides (MOX) has been investigated by laser heating under controlled atmosphere in the PuO 2 -rich composition range (with amount-of-substance fraction x (PuO 2 ) ⩾75%). The observed solidus/liquidus points are in agreement with the newly measured melting point of pure plutonium dioxide (3017 K). They suggest the existence of a minimum freezing temperature at a composition x (PuO 2 ) between 50% and 80%, in contrast with earlier research carried out with traditional furnace heating methods. The current results have been obtained under optimised experimental conditions aimed at maintaining the integrity and original composition of the samples throughout the laser heating cycles. With this goal in mind, experiments have been carried out under controlled gas pressure (pressurised air or argon) and short time duration ( 2− x compositions in equilibrium with the gas phase. |
| Databáze: | OpenAIRE |
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