Real-time monitoring of uranium concentration in NaCl–MgCl2–UCl3 molten salt.

Real-time monitoring of uranium concentration in molten salt reactors (MSR) is crucial for reactor operation and safety. However, conventional analytical methods cannot provide accurate results when uranium concentrations exceed approximately 4 wt%. We report an electrochemical technique based on repeating chronoamperometry (RCA) for precise and accurate measurements of uranium concentrations > 10 wt% in a NaCl–MgCl2–UCl3 molten salt. Uranium concentration was measured in a molten salt containing 5–12.5 wt% of uranium chloride with high precision and a linearity close to 1. The RCA technique can be used for measuring the concentration of nuclear fuel in MSRs. [ABSTRACT FROM AUTHOR]