Abstract
Highly dilute metal ions can aggregate in a high-temperature ionic-liquid medium and form long-lived clusters. The unexpected finding, which is the result of a study that combines experiment and modeling, sheds light on the early stages of corrosion in molten salt reactors (MSRs). MSRs are a next-generation, high-efficiency nuclear power plant technology in which nuclear fuel contained in a high-temperature salt circulates through the reactor in the liquid state. By running roughly 500 °C higher than today’s solid-fuel commercial reactors, MSRs promise to boost thermodynamic efficiency. More than 50 years after researchers began studying MSRs, however, the technology remains under development. One reason is that molten salts can corrode reactor vessels, slowly leaching chromium from alloys that otherwise perform well. To probe the corrosion process at the atomic level, Alexander S. Ivanov of Oak Ridge National Laboratory and coworkers used X-ray scattering and theoretical simulations to study the behavior of
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