| Autor: |
Sonia García-Gómez, Javier Giménez, Ignasi Casas, Jordi Llorca, Joan De Pablo, Albert Martínez-Torrents, Frederic Clarens, Jakub Kokinda, Luis Iglesias, Daniel Serrano-Purroy |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Nuclear Engineering and Technology, Vol 56, Iss 1, Pp 34-41 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1738-5733 |
| DOI: |
10.1016/j.net.2023.08.024 |
| Popis: |
This work presents experimental data and modelling of the release of Mo from high-burnup spent nuclear fuel (63 MWd/kgU) at two different pH values, 8.4 and 13.2 in air. The release of Mo from SF to the solution is around two orders of magnitude higher at pH = 13.2 than at pH = 8.4. The high Mo release at high pH would indicate that Mo would not be congruently released with uranium and would have an important contribution to the Instant Release Fraction, with a value of 5.3%.Parallel experiments with pure non irradiated Mo(s) and XPS determinations indicated that the faster dissolution at pH = 13.2 could be the consequence of the higher releases from metallic Mo in the fuel through a surface complexation mechanism promoted by the OH− and the oxidation of the metal to Mo(VI) via the formation of intermediate Mo(IV) and Mo(V) species. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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