[2I01-07] Fast Reactor Fuel Development

[2I05] The measurement of thermal conductivity of MOX including simulated FPs and impurities

*Yuta Horii¹, Shun Hirooka¹, Masato Kato¹, Hiroki Uno², Masahiro Ogasawara², Tetsuya Tamura², Tadahisa Yamada², Kazuyuki Okumura¹ (1. JAEA, 2. Inspection Development)

Keywords:MOX, thermal conductivity, simulated FP, impurity, low-decontaminated fuel

As part of studies on physical properties of low-decontaminated fuel pellets, simulated FPs (Sm₂O₃ and Nd₂O₃) and impurities included at such as fuel fabrication process (Al₂O₃ and SiO₂) were added to MOX, and their effects on thermal conductivity were evaluated. Addition of Sm₂O₃ and Nd₂O₃ in MOX, that can be solutionized, decreased thermal conductivity whereas addition of Al₂O₃ and SiO₂, that don't make a solid solution with MOX, increased thermal conductivity.