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- Centre National de la Recherche ScientifiqueFR67 papers
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5 papers · 2 filters
Influence of the U3O7 domain structure on cracking during the oxidation of UO2
Lionel Desgranges, Hervé Palancher, M. Gamaléri +5
Cracking is observed when a UO_{2} single crystal is oxidised in air. Previous studies led to the hypothesis that cracking occurs once a critical depth of U_{3}O_{7} oxidised layer…
Shot-Peening of Pre-Oxidized Plates of Zirconium: Influence of Residual Stress on Oxidation
Laura Raceanu, Virgil Optasanu, Tony Montesin +2
The present study deals with oxidation behavior under residual stress of shot-peened plates of "commercially pure" zirconium exposed for 30 min at 650 C. The influence of the shot-…
Simulation of Metal/Oxide Interface Mobility: Effects of Mechanical Stresses on Geometrical Singularities
Virgil Optasanu, Laura Raceanu, Tony Montesin
During the last decade, an increasing importance has been given to the feedback of mechanical stresses on the chemical diffusion and, further, on corrosion. Many works point the ac…
Pre-Stressed Sub-Surface Contribution on Bulk Diffusion in Metallic Solids
Laura Raceanu, Virgil Optasanu, Tony Montesin +1
Our recent modelling works and corresponding numerical simulations realized to describe the UO2 oxidation processes confirm the theory showing that an applied mechanical strain can…
Specific Aspects of Internal Corrosion of Nuclear Clad Made of Zircaloy
Jean-Baptiste Minne, Lionel Desgranges, Virgil Optasanu +3
In PWR, the Zircaloy based clad is the first safety barrier of the fuel rod, it must prevent the dispersion of the radioactive elements, which are formed by fission inside the UO2…