Electromotive force measurements of U-Zr alloys in LiCl-KCl-UCl3 melt

Electromotive force measurements of U-60Zr (79.6 at.% Zr) and U-77Zr (89.7 at.% Zr) alloys in LiCl-KCl-UCl3 melt were carried out in temperature range 670-800 K for determining d f G degrees UZr 2 , the temperature dependence of which was expressed as d f G degrees UZr 2 ( kJ/mol-atom ) = (-59.29 +/- 1.37) + (32.0 +/- 1.9) x 10-3T(K) Correlation suggested stability of S-UZr2 to be higher than what is currently accepted in literature, which is based on its enthalpy of formation at 298.15 K. Cyclic voltammetry with U-Zr alloys as working electrode was also performed in potential range -1.50 to -0.50 Vin LiCl-KCl-UCl3 melt for exploring onset potential of dissolution of uranium and zirconium to address consequences of higher stability of UZr2 on spent metal fuel dissolution.