A way to limit the corrosion in the Molten Salt Reactor concept: the salt redox potential control

作者：Gibilaro M^*; Massot L; Chamelot P

来源：Electrochimica Acta, 2015, 160: 209-213.

DOI：10.1016/j.electacta.2015.01.142

• redox potential control
• Molten Salt Fast Reactor
• U

The possibility of controlling the salt redox potential thanks to a redox buffer in the Molten Salt Fast Reactor was investigated, the goal was to limit the oxidation of the reactor structural material. Tests were performed in LiF-CaF2 at 850 degrees C on two different redox couples to fix the salt potential, Eu(III)/Eu(II) and U (IV)/U(III), where the first one was used as inactive system to validate the methodology to be applied on the uranium system. A metallic reducing agent (Gd plate for Eu, and U plate for U system) was inserted in the salt, leading to a spontaneous reaction: Eu(III) and U(IV) were then reduced. Eu(III) was fully converted into Eu(II) with metallic Gd, validating the approach. On the U system, the U(IV)/U(III) ratio has to be set between 10 and 100 to limit the core material oxidation: addition of metallic U decreased the concentration ratio from the infinite to 1, showing the feasibility of the salt redox potential control with the U system.

• 出版日期2015-4-1