Roadmap for thermal property measurements of Molten Salt Reactor systems

Assessment of Molten Eutectic LiF-NaF-KF Density through Experimental Determination and Semiempirical Modeling

“…To estimate the density of LiF-NaF-KF, a model using RK expansion was applied . The methodology for density estimation is explained by Agca et al and Mcmurray et al Accordingly, the density equation for the liquid mixture (ρ mix ) is composed of two terms: the ideal and excess behavior. Equation shows the density of the molten salt mixture. The ideal behavior term (ρ id ) comes from the additive nature of the volume as a physical property, whereas ρ ex is the term to account for the deviation from the ideal density behavior.…”

“…To estimate the density of LiF-NaF-KF, a model using RK expansion was applied. 51 The methodology for density estimation is explained by Agca et al 20 and Mcmurray et al 10 Accordingly, the density equation for the liquid mixture (ρ mix ) is composed of two terms: the ideal and excess behavior. Equation 2shows the density of the molten salt mixture.…”

“…The Redlich–Kister (RK) expansion has been previously applied for empirical property predictions of density by extrapolation on endmember and pseudo-binary salt mixtures . These semiempirical models provide a tractable formulation that can be easily integrated into thermal systems codes and analysis software, allowing the community to readily evaluate the properties of different salt mixtures. , RK and similar semiempirical models also have the potential to be used in data screening efforts that focus on the identification of errant, outlier data in pseudo-binary or higher-order mixtures.…”

“…One factor limiting the development of these hightemperature fluid systems is insufficient knowledge of temperature-dependent thermophysical and chemical properties for many salt mixtures. 10 Although a variety of molten salts may be used in different energy systems, all systems will require knowledge of the salt mixture's thermophysical properties for the design and optimization of components. For example, density is required for estimating thermal storage capacity, as well as mass flow calculations.…”

Density Measurements of Various Molten Sodium, Magnesium, Potassium, and Uranium Chloride Salt Compositions Using Neutron Imaging

“…Data from Mochinaga et al have significantly higher thermal expansion terms in their density data on the UCl 3 -rich side, as also shown by an experimental/semi-empirical study from Parker et al 37 and an ab initio molecular dynamics study by Andersson et al 38 Parker et al's theoretical density plots between molten NaCl−UCl 3 indicate slight positive deviation from ideality, as opposed to negative deviation from RK model results in this study. 37 The calculated RK density relations are provided in Table 2, and the methodology used is outlined in a study by McMurray et al 39 The linear relations are regressed from the RK model equation for simplicity. Plots of the density equations are provided in Figure S2 in the Supporting Information and show substantial deviation from ideal behavior except for the NaCl− KCl mixture.…”