| 摘要 |
<p>PURPOSE:To simplify a processing step and reduce costs by uniting a Tc stripping solution from a Tc stripping step set after a main extracting/cleaning step in a co-decontamination step of a reprocessing process, at a cleaning step of the precedent process. CONSTITUTION:In a co-decontamination step of a reprocessing purex process of spent fuel, septivalent technetium Tc (VII) extracted in a U-Pu organic product through the co-extraction of Zr, Pu and U is removed from the organic phase and discharged in a high-level water-phase waste liquid. For this purpose, a Tc stripping step is arranged after a main extracting/cleaning step in the co-decontamination process. The aqueous solution containing the stripped Tc is injected between a feeding stage of a feed liquid and a feeding stage of an extraction solvent in the main extracting/cleaning step, so that the Tc is discharged into the high-level water-phase waste liquid quantitatively.</p> |
