[3M05-09] Thermal Properties of Oxide Fuels

[3M06] Measurement of Thermal Expansion and Specific Heat of CaF₂

*Ryota Tsuchimochi¹, Masato Kato¹, Shun Hirooka¹, Taku Matsumoto¹, Hiroki Uno², Masahiro Ogasawara², Hiromasa Sugata² (1. Japan Atomic Energy Agency, 2. Inspection Development Company Ltd.)

Keywords:CaF2, Specific heat, Thermal expansion

Lattice parameter and specific heat of CaF₂ which forms the same crystal structure as actinide oxides, were measured by using high-temperature X-ray diffractmeter and differential scanning calorimetry. We confirmed that the specific heat of CaF₂ explicity shows the effect of Excitation term on top of the heat capacity at constant volume and dilatational term. The analysis of the specific heat will be discussed together with the measured data.