[G] Thermodynamics, Phase equilibriua, Phase diagram

[196] Thermodynamic Investigation of Ni Addition Influence on the Activity of Zr in Fe-Zr Liquid Phase at 1600℃

*Weirong YANG¹, Ayumi Itoh², Shintaro Yasui^2,3, Yoshinao Kobayashi^1,3 (1. School of Materials and Chemical Technology, Tokyo Institute of Technology, 2. Laboratory for Zero-Carbon Energy, Tokyo Institute of Technology, 3. Laboratory for Materials and Structures, Tokyo Institute of Technology)

Keywords:Fukushima Daiichi Nuclear Power Station、severe accident、decommissioning、Fuel debris、high temperature thermodynamic、metallic solution

In this study, the activity of Zr in the ternary liquid phase was measured by the chemical equilibrium method with Ag as reference metal. A decrease in Zr activity was found with the addition of Ni.