Transient testing of oxide fuels by spark plasma sintering and finite element analysis

Zhao, Dong; Broussard, Andre; Yao, Tiankai; Yan, Kevin; Ban, Heng; Lian, Jie

doi:10.1016/j.jeurceramsoc.2023.09.058

Journal of the European Ceramic Society

2024

DOI: 10.1016/j.jeurceramsoc.2023.09.058

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Transient testing of oxide fuels by spark plasma sintering and finite element analysis

Dong Zhao,

Andre Broussard,

Tiankai Yao

et al.

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2024

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Cited by 1 publication

References 33 publications

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Transient behavior of oxide fuels with controlled microstructure and Cr2O3 additive

Zhao,

Ban,

Yang

et al. 2024

npj Mater Degrad

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Microstructure and Cr2O3 doping profoundly impact the thermal-mechanical properties and fracture of oxides fuels. It is a challenge to study the transient behavior of nuclear fuels under loss-of-coolant-event (LOCA). In this study, the crack behavior of UO2 pellets with controlled grain structure and Cr2O3 doping was tested with rapid power ramping (300−900 °C per min) mimicking a prototypical LOCA heating profile. Dense micron-sized UO2 pellets display well-maintained integrity without cracking with the ramping up to 1500 °C at a heating rate of 8 °C per second. Fracture occurs in both pure and Cr2O3-doped dense nano-sized UO2 pellets. The Cr2O3 doped oxide fuel pellet with a larger grain size (~ 22.2 μm) displays the best performance under LOCA testing due to its highest thermal conductivity under high temperature. FEA calculations suggest a temperature gradient across the fuel pellet during transient testing, resulting in residual stress and cracking, which can be correlated with their thermal-mechanical properties.

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Transient behavior of oxide fuels with controlled microstructure and Cr2O3 additive

Zhao,

Ban,

Yang

et al. 2024

npj Mater Degrad

View full text Add to dashboard Cite

show abstract

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Transient testing of oxide fuels by spark plasma sintering and finite element analysis

Cited by 1 publication

References 33 publications

Transient behavior of oxide fuels with controlled microstructure and Cr2O3 additive

Transient behavior of oxide fuels with controlled microstructure and Cr2O3 additive

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