Thermal conductivity of U–Mo/Al dispersion fuel: effects of particle shape and size,stereography, and heat generation |
| |
Authors: | Tae Won Cho Yeon Soo Kim |
| |
Affiliation: | 1. School of Mechanical and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 689-798, Republic of Korea;2. Argonne National Laboratory, 9700 S. Cass Ave, Argonne, IL 60439, USA |
| |
Abstract: | This paper describes the effects of particle sphericity, interfacial thermal resistance, stereography, and heat generation on the thermal conductivity of U–Mo/Al dispersion fuel. The ABAQUS finite element method (FEM) tool was used to calculate the effective thermal conductivity of U–Mo/Al dispersion fuel by implementing fuel particles. For U–Mo/Al, the particle sphericity effect was insignificant. However, if the effect of the interfacial thermal resistance between the fuel particles and Al matrix was considered, the thermal conductivity of U–Mo/Al was increased as the particle size increases. To examine the effect of stereography, we compared the two-dimensional modeling and three-dimensional modeling. The results showed that the two-dimensional modeling predicted lower than the three-dimensional modeling. We also examined the effect of the presence of heat sources in the fuel particles and found a decrease in thermal conductivity of U–Mo/Al from that of the typical homogeneous heat generation modeling. |
| |
Keywords: | U–Mo/Al dispersion fuel thermal conductivity particle shape particle size interfacial thermal resistance stereography heterogeneous heat generation |
|
|