SharePoint
Aide
Faire avancer la sûreté nucléaire

La Recherchev2

Publications

An atomistic modeling of the xenon bubble behavior in the UO2 matrix


Fermer

Authentification

Email :

Mot de passe :

​Journal of Nuclear Materials / Volume 444, issues 1-3, pages 153-160, janvier 2014

Type de document > *Article de revue

Mots clés >

Unité de recherche > IRSN/PSN-RES/SEMIA/LPTM

Auteurs > JELEA Andrei, PELLENQ Roland J-M., RIBEIRO Fabienne

Date de publication > 29/09/2013

Résumé

​The behavior of the xenon nanoinclusions/bubbles in the uranium dioxide (UO2) matrix and their influence on its swelling were investigated through atomistic simulation techniques. The pressure in bubbles of less than 2 nm in diameter, calculated using a virial equation that takes into account the xenon/matrix interactions, is larger than the pressure calculated in simulations of the equivalent density and temperature of super critical bulk xenon. The radial distribution function of confined xenon is characteristic of a dense (ρ > 4 g/cm3) glassy phase. The swelling of the UO2 induced by the intragranular bubbles is proportional to the Xe/U ratio but independent of the temperature.