[2E01-07] Evaluation of physical properties of nuclear fuel

[2E03] Defect equilibria, electrical conductivity and oxygen diffusion

*Masato Kato¹, Hiroki Nakamura¹, Masashi Watanabe¹, Masahiko Machida¹ (1. Japan Atomic Energy Agency)

Keywords:PuO2, CeO2, defect equilibria

PuO₂ and CeO₂ have a fluorite structure and oxygen nonstoichiometric compound, which have similar thermal and mechanical properties. Property change in nonstoichiometric region was evaluated using results of DFT calculation and oxygen potential measurement and constructed Brouwer’s diagram. This diagram showed to be consisted among defect equilibria, electrical conductivity and oxygen diffusion coefficient.