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Observed Redox Potential Range of Li2BeF4 Using a Dynamic Reference Electrode

Brian Kelleher, Kieran Dolan, Mark Anderson, Kumar Sridharan

Nuclear Technology / Volume 195 / Number 3 / September 2016 / Pages 239-252

Technical Paper / dx.doi.org/10.13182/NT15-140

First Online Publication:August 6, 2016
Updated:September 1, 2016

A compact electrochemical probe has been used to measure the redox potential ranges of molten Li2BeF4, a candidate nuclear reactor coolant commonly referred to as flibe, via a dynamic beryllium reference electrode. This probe is capable of operating on a loop, but was used on a static system in salt at temperatures up to 600°C. The probe has been used to measure Li2BeF4 salt with observed redox potentials ranging from −1.792 ± 0.002 V to −0.465 ± 0.134 V, yielding individual errors as low as ± 4 mV, and weighted groupings with errors as low as ± 1 mV. The most reducing measurement taken with acceptable error was −0.962 ± 0.011 V. This probe can be adapted for use in many laboratory experiments using flibe and should be considered for any corrosion experiment supporting the development of a next-generation molten salt reactor.

 
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