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New helium equation of state for pressurized nanobubbles in UO$_2$: matrix calculated via molecular dynamics simulations

Abstract : During storage helium atoms accumulate in spent fuel via a-decay. These helium atoms may cluster into nanoscopic bubbles (c.f. opposite Figure), which could change the physical properties of spent fuel. To estimate the impact of such bubbles, it is essential to possess a good thermodynamical model for helium interacting with the surrounding matrix including states at high pressures and temperatures. Therefore, MD simulations are carried out to establish a new equation of state (EOS) for helium in nanobubbles embedded in UO$_2$ matrix.
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https://hal-cea.archives-ouvertes.fr/cea-02400205
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Submitted on : Friday, February 21, 2020 - 10:10:23 AM
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Long-term archiving on: : Friday, May 22, 2020 - 12:43:53 PM

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  • HAL Id : cea-02400205, version 1

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Laurent van Brutzel, Alain Chartier. New helium equation of state for pressurized nanobubbles in UO$_2$: matrix calculated via molecular dynamics simulations. NUMAT 2018 - The Nuclear Materials Conference, Oct 2018, Seattle, United States. ⟨cea-02400205⟩

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