Skip to Main content Skip to Navigation
Conference papers

Calculations of thermodynamical properties of U3Si2

Johann Bouchet 1 Cyril Mouleux 1 Francois Bottin Alois Castellano 
1 LM2C - Laboratoire de Modélisation Multi-échelles des Combustibles
SESC - Service d'Etudes de Simulation du Comportement du combustibles : DEN/DEC/SESC
Abstract : Uranium silicide compounds, especially U3Si2, have been studied as a potential replacement for uranium dioxide fuel in pressurized water reactors. These compounds offer several superior properties as a larger thermal conductivity and a higher uranium density. The thermodynamical quantities (specific heat, thermal expansion and conductivity…) are crucial to drive the fuel design. They are directly related to the atomic vibrations and more specifically, they can be extracted from the phonon spectra and the crystal structure. In this work we calculate the phonon spectra of different structures of the U3Si2 compound, up to the meltin curve, by taking into account the anharmonic effects and by using the TDEP method[1]. The thermodynamical properties extracted from these phonon spectra will then be compared to the previous calculations and the available experimental data. We show that the unique features of the crystallographic structure of this compound drive its behaviour in temperature.
Document type :
Conference papers
Complete list of metadata

https://hal-cea.archives-ouvertes.fr/cea-03698081
Contributor : Contributeur MAP CEA Connect in order to contact the contributor
Submitted on : Friday, June 17, 2022 - 3:30:11 PM
Last modification on : Saturday, June 18, 2022 - 3:52:54 AM

Identifiers

  • HAL Id : cea-03698081, version 1

Collections

Citation

Johann Bouchet, Cyril Mouleux, Francois Bottin, Alois Castellano. Calculations of thermodynamical properties of U3Si2. Uranium Science, Jun 2021, online, United Kingdom. ⟨cea-03698081⟩

Share

Metrics

Record views

0