NuFuel & MMSNF 2015

First Workshop on Research into Nuclear Fuel in Europe
and Materials Modeling and Simulation for Nuclear Fuels Workshop
Karlsruhe, Germany, November 16th to 18th, 2015

Updated: Tue 08 Dec 2015, 14:27

Talk 1.3: Synthesis and Oxidation Testing of U-Si-Al Ternary Compounds

Elizabeth Sooby, J. T. White, D. D.Byler, A.T. Nelson, and K. J. McClellen
  • Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM USA

Abstract

Uranium silicide intermetallic compounds are currently under investigation by the DOE-NE Advanced Fuels Campaign as candidate accident tolerant nuclear fuel concepts. While some compounds in this system offer benefits compared to reference UO2, they have been shown to display poor oxidation resistance and pellet cracking. It is hypothesized that introducing an additional compositional degree of freedom by exploring U-Si-X (X=Al or Ti) ternary systems may provide the means to design a candidate nuclear fuel which optimizes the benefits of each binary. Reported here are the fuel synthesis techniques and metallurgical processing of these U-Si-Al ternaries. In addition the preliminary oxidation results of a series of ternary compounds, beginning with the known U3Al2Si3 system will be presented.