Skip to Main content Skip to Navigation
Journal articles

A variable-gap model for helium bubbles in nickel

Abstract : In nuclear fission reactors, the amount of helium produced in materials by transmutation reactions at the end of the lifetime may reach several thousands of atomic parts per million (appm). Such high levels of helium production can impact the evolution of microstructures, particularly by forming helium bubbles. To better understand the role of helium on the stability of bubbles, a "variable-gap model" was parametrized with molecular dynamics (MD) calculations performed in nickel. This model predicts binding energies in a good agreement with MD values, especially for large bubbles. For very small bubbles, the influence of magic number sizes and faceting is more complex than can be described with the model. For these cases, it is proposed to use MD values directly.
Complete list of metadata

https://hal-cea.archives-ouvertes.fr/cea-03507803
Contributor : Contributeur Map Cea Connect in order to contact the contributor
Submitted on : Monday, January 3, 2022 - 1:30:05 PM
Last modification on : Thursday, January 6, 2022 - 3:37:09 AM

File

 Restricted access
To satisfy the distribution rights of the publisher, the document is embargoed until : 2022-11-04

Please log in to resquest access to the document

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Miroslav Fokt, Gilles Adjanor, Thomas Jourdan. A variable-gap model for helium bubbles in nickel. Computational Materials Science, Elsevier, 2022, 202, pp.110921. ⟨10.1016/j.commatsci.2021.110921⟩. ⟨cea-03507803⟩

Share

Metrics

Les métriques sont temporairement indisponibles