Solvent Extraction and Ion Exchange · 2001 · 54 citations · 4 references
EngineeringChemical EngineeringEnvironmental EngineeringSeparation ProcessesWaste ManagementWater TreatmentWaste DisposalWaste TreatmentWastewater ChemistryActinide Extraction ChemistryActinide Separation ChemistryCross-contaminationCross-contamination ControlDecontaminationReprocessingSalinity RemovalTechnical Decontamination
Abstract The TRPO process for partitioning of actinides from Chinese high saline HLLW was studied. A hot test was carried out in a countercurrent mode with actual HLLW by using a miniature centrifugal contactor set. This highly saline HLLW was obtained from a reprocessing plant. The 30%(v/v) TRPO-kerosene was used as extractant. The feed solution was the 2.7 times diluted HLLW and its HNO3 concentration was 1.08 mol/L. The results of the hot test were very attractive. Actinides as well as 99Tc were effectively separated from the HLLW by TRPO extraction. The decontamination factors (D.F) for total α and 99Tc activities are 588 and 125 respectively. Am, Np/Pu, and U were well stripped by 5.5 mol/L HNO3, 0.6 mol/L H2C2O4 and 5% Na2CO3, respectively. Their separation was very efficient, and cross contamination was very low. After partitioning the HLLW become a non-α waste. Acknowledgments
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Nuclear Science And Techniques
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Tsinghua Science and Technology
Tsinghua Science & Technology · 2007 · 28 citations