Electrochemical Measurement of CoO Solubility Product and Co Solubility in Molten Lead-Bismuth Eutectic by Solid-State Ionic Devices

Giacomo Gregori, Thomas Doneux, Jun Lim

    Research outputpeer-review

    2 Scopus citations


    The use of liquid Pb-Bi eutectic alloy (LBE) as primary coolant and spallation target in Lead-cooled Fast Reactors (LFRs) and Accelerator Driven Systems (ADSs) presents a corrosion challenge, as structural materials can release impurities, such as Fe, Cr, Ni and Co, into the coolant. These corrosion product impurities can react with dissolved oxygen, resulting in the formation of solid oxide particles that can block the critical flow channels in the core or heat-exchanger, compromising the safety of the reactor. Of particular concern is the additional radiological risk posed by cobalt, which can undergo neutron capture and be transmuted into the γ-emitter C 27 60 o . Therefore, it is essential to accurate assess the cobalt oxide solubility product and the cobalt solubility limit. In this work, we characterized the Co-O-LBE system through an electrochemical method that involved the coulometric titration of oxygen.

    Original languageEnglish
    Article number061505
    Number of pages5
    JournalJournal of The Electrochemical Society
    Issue number6
    StatePublished - 2023

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics
    • Surfaces, Coatings and Films
    • Electrochemistry
    • Materials Chemistry

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