The invention discloses a
solid-state
oxygen control device. The device comprises a container, a flow rate adjusting unit and a replenishment mechanism, wherein a
dissolution chamber for holding leadoxide
pellets is arranged in the container, and an inlet and an outlet which are communicated with the
dissolution chamber respectively are formed in two ends of the container; the flow rate adjustingunit is arranged on the container and used for controlling the flow rate of a
coolant in the container; the replenishment mechanism is connected with the
dissolution chamber to replenish the
lead oxide pellets for the dissolution chamber. By means of the arrangement of the replenishment mechanism and a return
pipe, the problem that current
solid state
oxygen control cannot realize online replenishment is solved, high-power
oxygen supply of a reactor device and online replenishment of the
lead oxide pellets are realized, the concentration of oxygen in the
coolant can be accurately controlled,so that a layer of dense
oxide film is formed on the surface of steel, lead-based
alloy is prevented from further penetrating into the steel, an anticorrosion effect is realized, key technical difficulties of a lead-based fast reactor or an ADS
system are overcome, and long-term
safe operation of an experimental loop and the lead-based fast reactor is ensured.