Dissolution of low burn-up (33 GWd·t-1) spent nuclear fuel at alkaline and hyperalkaline pH
The release of some key radionuclides during the dissolution of a low burnup spent nuclear fuel (33 GWd·t-1) was measured in two leaching experiments under oxidizing conditions and in alkaline to hyperalkaline pH. The results were compared to the ones obtained in a previous experiment with the same...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/446055 |
| Acceso en línea: | https://hdl.handle.net/2117/446055 https://dx.doi.org/10.1016/j.net.2025.103783 |
| Access Level: | acceso abierto |
| Palabra clave: | Spent nuclear fuel Hyperalkaline pH Uranium Actinides Caesium e particles Àrees temàtiques de la UPC::Enginyeria química |
| Sumario: | The release of some key radionuclides during the dissolution of a low burnup spent nuclear fuel (33 GWd·t-1) was measured in two leaching experiments under oxidizing conditions and in alkaline to hyperalkaline pH. The results were compared to the ones obtained in a previous experiment with the same fuel but with a higher burnup (63 GWd·t-1). Uranium, plutonium and neptunium had a faster release at low burnup, caesium a slower release and the release of molybdenum and technetium did not almost depend on burnup. The experiment at pH = 13.5 showed a possible precipitation of uranium, plutonium and neptunium and much higher molybdenum and technetium release than at alkaline pH, pointing to a higher dissolution of the e-particles at high pH. |
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