| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Thermodynamics of Materials in Extreme Environments
|
| Presentation Title |
Thermodynamic Investigation of Multicomponent Chloride Molten Salts for Spent Fuel Processing |
| Author(s) |
Liangyan Hao, Soumya Sridar, Elizabeth Sooby, Wei Xiong |
| On-Site Speaker (Planned) |
Liangyan Hao |
| Abstract Scope |
Pyroprocessing has been developed to recycle uranium from spent fuels and thus reduce radioactive wastes. To effectively monitor the change of thermodynamic properties and liquidus temperature for the molten salt electrolyte with composition, a multicomponent thermodynamic database for the KCl-LiCl-NaCl-UCl3-LnCl3 (Ln=La, Nd, Pr) will be established. Based on the SGTE Substance Database, fifteen binary systems have been optimized to satisfactorily reproduce experimental phase equilibria and thermodynamic properties data. Short-range ordering present in the liquid phase was described by the two-sublattice ionic model. Thermal analysis was firstly performed to study the phase equilibria in the KCl-NaCl-UCl3 and LiCl-NaCl-UCl3 systems and support the thermodynamic modeling. The established multicomponent database will contribute to the development of advanced reactors, such as small modular reactors. |