About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials and Chemistry for Molten Salt Systems
|
Presentation Title |
Molecular Structure of Molten Fluoride Salts for Nuclear Energy by Diffraction Measurements
and Ab–initio Simulations |
Author(s) |
David Sprouster, G Zheng, D Olds, S-C Lee, Y Zhang, B Khaykovich |
On-Site Speaker (Planned) |
David Sprouster |
Abstract Scope |
There has been a resurgence of Molten–Salt Nuclear Reactor (MSR) concepts. Designers of MSR’s need detailed knowledge of the molten salt properties and predictive models. Properties of interest include molecular structure and speciation for the salt components and impurities. In this work, we discuss our coupled experiment and modelling efforts aimed at validating fast–acting models that can handle molten salts with a large number of chemical elements to predict properties as a function of composition and temperature. In particular, the molecular structure as described by Pair–Distribution Functions (PDF) underlines the solubility, thermodynamic, and transport properties of the melts. Here, we report on our recent PDF measurements of FLiNaK with added fission product (CsF) or redox control agent (ZrF4). We find that ZrF4 and CsF additions lead to complex phases and non-trivial melting behavior. Our approach has been crucial in verifying and validating high–quality numerical models of molten salts. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Modeling and Simulation, |