Applications of Thermochemical Modeling in Molten Salt Reactors

Theodore M. Besmann; Juliano Schorne-Pinto; Mina Aziziha; Amir M. Mofrad; Ronald E. Booth; Jacob A. Yingling; Jorge Paz Soldan Palma; Clara M. Dixon; Jack A. Wilson; Donny Hartanto

doi:10.3390/ma17020495

Applications of Thermochemical Modeling in Molten Salt Reactors

Theodore M. Besmann, Juliano Schorne-Pinto, Mina Aziziha, Amir M. Mofrad, Ronald E. Booth, Jacob A. Yingling, Jorge Paz Soldan Palma, Clara M. Dixon, Jack A. Wilson, Donny Hartanto

Research and Test Reactor Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The extensively evaluated and consistent thermodynamic database, the Molten Salt Thermal Properties Database—Thermochemical (MSTDB-TC), was used along with additional thermodynamic values from other sources as examples of ways to examine molten salt reactor (MSR) fuel behavior. Relative stability with respect to halide potential and temperature for likely fuel and fission product components were mapped in Ellingham diagrams for the chloride and fluoride systems. The Ellingham diagrams provide a rich, visual means for identifying halide-forming components in proposed fuel/solvent salt systems. Thermochemical models and values from MSTDB-TC and ancillary sources were used in global equilibrium calculations to provide compositions for a close analysis of the behavior of a possible Molten Chloride Salt Fast Reactor and a Molten Salt Reactor Experiment-type system at high burnup (100 GWd/t). The results illustrated the oxidative nature of burnup in MSRs and provided information about redox behavior and possible control.

Original language	English
Article number	495
Journal	Materials
Volume	17
Issue number	2
DOIs	https://doi.org/10.3390/ma17020495
State	Published - Jan 2024

Funding

This research was supported by the U.S. DOE Office of Nuclear Energy, the Nuclear Energy Advanced Modeling and Simulation Program; the Molten Salt Reactor Program; and the Nuclear Energy Universities Program, project DE-NE0008985.

Keywords

CALPHAD
fission products
molten salts
redox

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title = "Applications of Thermochemical Modeling in Molten Salt Reactors",

abstract = "The extensively evaluated and consistent thermodynamic database, the Molten Salt Thermal Properties Database—Thermochemical (MSTDB-TC), was used along with additional thermodynamic values from other sources as examples of ways to examine molten salt reactor (MSR) fuel behavior. Relative stability with respect to halide potential and temperature for likely fuel and fission product components were mapped in Ellingham diagrams for the chloride and fluoride systems. The Ellingham diagrams provide a rich, visual means for identifying halide-forming components in proposed fuel/solvent salt systems. Thermochemical models and values from MSTDB-TC and ancillary sources were used in global equilibrium calculations to provide compositions for a close analysis of the behavior of a possible Molten Chloride Salt Fast Reactor and a Molten Salt Reactor Experiment-type system at high burnup (100 GWd/t). The results illustrated the oxidative nature of burnup in MSRs and provided information about redox behavior and possible control.",

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AU - Mofrad, Amir M.

AU - Booth, Ronald E.

AU - Yingling, Jacob A.

AU - Paz Soldan Palma, Jorge

AU - Dixon, Clara M.

AU - Wilson, Jack A.

AU - Hartanto, Donny

PY - 2024/1

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AB - The extensively evaluated and consistent thermodynamic database, the Molten Salt Thermal Properties Database—Thermochemical (MSTDB-TC), was used along with additional thermodynamic values from other sources as examples of ways to examine molten salt reactor (MSR) fuel behavior. Relative stability with respect to halide potential and temperature for likely fuel and fission product components were mapped in Ellingham diagrams for the chloride and fluoride systems. The Ellingham diagrams provide a rich, visual means for identifying halide-forming components in proposed fuel/solvent salt systems. Thermochemical models and values from MSTDB-TC and ancillary sources were used in global equilibrium calculations to provide compositions for a close analysis of the behavior of a possible Molten Chloride Salt Fast Reactor and a Molten Salt Reactor Experiment-type system at high burnup (100 GWd/t). The results illustrated the oxidative nature of burnup in MSRs and provided information about redox behavior and possible control.

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Applications of Thermochemical Modeling in Molten Salt Reactors

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Keywords

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