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In situ control of oxygen partial pressure in a buffered UO2 fuel: A manufacturing process

hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorKHAIR, Mira
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorRIGLET-MARTIAL, Chantal
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorMATHERON, Pierre
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorLÉCHELLE, Jacques
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorPALANCHER, Hervé
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorILTIS, Xavière
hal.structure.identifierCEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) [CEA-DES (ex-DEN)]
dc.contributor.authorTARISIEN, Nicolas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorHEINTZ, Jean-Marc
dc.date.issued2020
dc.identifier.issn0955-2219
dc.description.abstractEnAn innovative laboratory process making use of the specific properties of solid redox buffers was developed for producing O2 self-regulated UO2 fuel samples. The method was optimized using Molybdenum and Niobium oxide buffers. The starting materials were first mixed with the UO2 powder, then pressed into pellets and finally sintered in a quasi-closed vessel at 1670 °C under strictly controlled oxygen potential using appropriate solid redox buffers. Speciation of Mo and Nb was characterized using Scanning Electron Microscopy (SEM) combined with Energy Dispersive X-ray spectroscopy (EDX) as well as X-ray Diffraction (XRD). Using this optimized procedure, both oxido-reducing forms of the O2 buffer incorporated into the UO2 specimens were preserved during sintering, allowing an in situ control of the O2 partial pressure inside the material. The processing methodology, the laboratory experimental set-up, the sintering procedure and the characteristics of the final oxygen buffered UO2 fuel are described. This work opens the path to representative laboratory studies related to the redox dependent behavior of irradiated fuels in reactor.
dc.language.isoen
dc.publisherElsevier
dc.subject.enMolybdenum
dc.subject.enNiobium
dc.subject.enUranium
dc.subject.enOxide
dc.subject.enFuel
dc.subject.enThermodynamics
dc.subject.enOxido-reduction
dc.subject.enOxygen buffer
dc.subject.enRedox buffer
dc.subject.enO2 regulation
dc.subject.endopant
dc.title.enIn situ control of oxygen partial pressure in a buffered UO2 fuel: A manufacturing process
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jeurceramsoc.2019.11.005
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of the European Ceramic Society
bordeaux.page1626-1638
bordeaux.volume40
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-02481021
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02481021v1
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