|About this Abstract
||MS&T23: Materials Science & Technology
||Thermodynamics of Materials in Extreme Environments
||Thermodynamic Assessment of the MgCl2-NaCl-KCl-CsCl Pseudo-quaternary System for Calculation of Volatile Fission Product (Cesium) Behavior in Molten Chloride Reactors
||Clara M. Dixon, Juliano Schorne-Pinto, Mina Aziziha, Jorge Paz Soldan Palma, Theodore Besmann
|On-Site Speaker (Planned)
||Clara M. Dixon
Developing accurate thermochemical models to predict the behavior of the volatile fission product cesium under simulated accident conditions is integral to the development and licensing of any molten salt reactor (MSR). We are thus developing thermochemical models and values for cesium in molten chloride fuel salts, which are key to simulating their transport and behavior for accident analysis. The relevant pseudo-binary subsystems were assessed using reported values and the Computer CALculation of PHAse Diagrams (CALPHAD) methodology. These were then interpolated to generate pseudo-ternary subsystems which were optimized using previous measurements, together with the first known equilibria measurements made on MgCl2-KCl-CsCl and MgCl2-NaCl-CsCl in the current work for. The MgCl2-NaCl-KCl-CsCl pseudo-quaternary system was interpolated from the optimized binary and ternary parameter systems and the equilibrium vapor pressure of CsCl calculated for several MgCl2-NaCl-KCl-CsCl mixtures containing up to 5 mol% CsCl.