Demonstrates ultrafast uranium extraction in spent nuclear fuel reprocessing, indicating high efficiency and low energy consumption.
An oscillating feedback microreactor (OFM) featuring a multimicroporous inlet was designed to intensify radionuclide extraction during spent nuclear fuel reprocessing. This reactor ingeniously combines predispersion via microporous injection with further droplet fragmentation through intense chaotic convection. Flow visualization experiments and the Villermaux–Dushman protocol revealed that at a flow rate of 160 mL/min, the mixing index surged to nearly 100%, achieving remarkably fast micromixing in just 0.85 ms. Pressure drop (Δ P ) and energy consumption ( ε ) were rigorously evaluated, and the OFM boasts remarkably low Δ P and ε . Nitric acid and radioactive uranium extraction experiments further unveiled extraordinary performance. The impact of total flow rate, flux ratio, nitric acid concentration, and TBP volume fraction on extraction efficiency E and mass transfer coefficient ka was thoroughly investigated. E reached a maximum of 97.38% within just 0.235 s, highlighting the OFM’s remarkable potential for rapid liquid–liquid extraction in spent fuel reprocessing.
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He et al. (2026) studied this question.
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