Back to Search Start Over

Effective thermal conductivity model of porous polycrystalline UO2: A computational approach

Authors :
Bohyun Yoon
Kunok Chang
Source :
Nuclear Engineering and Technology. 54:1541-1548
Publication Year :
2022
Publisher :
Elsevier BV, 2022.

Abstract

The thermal conductivity of uranium oxide (UO2) containing pores and grain boundaries is investigated using continuum-level simulations based on the finite-difference method in two and three dimensions. Steady-state heat conduction is solved on microstructures generated from the phase-field model of the porous polycrystal to calculate the effective thermal conductivity of the domain. The effects of porosity, pore size, and grain size on the effective thermal conductivity of UO2 are quantified. Using simulation results, a new empirical model is developed to predict the effective thermal conductivity of porous polycrystalline UO2 fuel as a function of porosity and grain size.

Details

ISSN :
17385733
Volume :
54
Database :
OpenAIRE
Journal :
Nuclear Engineering and Technology
Accession number :
edsair.doi...........8c57212f8df29d92e660d72a8417e89e