| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ribeiro Costa, Diogo
Westinghouse Electric (Sweden)
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2023Micromechanical modeling of single crystal and polycrystalline UO 2 at elevated temperaturescitations
- 2022Interface interactions in UN-X-UO2 systems (X = V, Nb, Ta, Cr, Mo, W) by pressure-assisted diffusion experiments at 1773 Kcitations
- 2022Coated ZrN sphere-UO2 composites as surrogates for UN-UO2 accident tolerant fuelscitations
- 2021Coated UN microspheres embedded in UO2 matrix as an innovative advanced technology fuel: early progress
- 2021Compatibility of UN with refractory metals (V, Nb, Ta, Cr, Mo and W): an abinitio approach to interface reactions and diffusion behaviorcitations
- 2021Towards high-fidelity fuel pellet fracture modelling in current and new fuel designs
Places of action
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report
Towards high-fidelity fuel pellet fracture modelling in current and new fuel designs
Abstract
Cracking of UO2 clearly requires detailed understanding of local microscopic and macroscopic stresses. Also, the structural details and their effects on the microcracking should be known. To improve the fuel fracture modelling, we have started the work towards binding the structural features of the pellets with the crack behaviour modelling. The report shows measurements of a standard pellet with EBSD techniques and reviews macroscopic stress behaviour in 2D horizontal plane for differently sized pellets applying the BISON fuel performance code. The SEM-EBSD results of a standard UO2 pellet showed a dense microstructure with small and round pores in inter- and intra-granular locations, which are characteristic of such a fuel. There was no preferential crystallographic orientation in the sample. The stress behaviour in the fuel pellets was modelled during different power-up ramp rates. The varying diameter of pellets did not show any particular differences in the stress behaviour, except for the maximum stress location due to reduced pellet-cladding gap. Introducing a macroscopic crack in the pellet caused localization of the stress and the smeared cracking model of the BISON code worked well.