Extraction-Scrub-Strip test results from the interim Salt Disposition Program Macrobatch 9 Tank 21H qualification samples

Peters, T.¹ 

[1] Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

关键词: SOLVENT EXTRACTION;    CESIUM;    TANKS;    SALTS;    SOLUTIONS;    SAVANNAH RIVER PLANT;    SOLVENTS;    DECONTAMINATION;    RADIOACTIVE W;   

DOI  :  10.2172/1240866
RP-ID  :  SRNL--STI-2016-00078
PID  :  OSTI ID: 1240866
Others  :  TRN: US1600685

美国|英语

来源: SciTech Connect

【 摘 要 】

Savannah River National Laboratory (SRNL) analyzed samples from Tank 21H in support of qualification of Macrobatch (Salt Batch) 9 for the Interim Salt Disposition Program (ISDP). The Salt Batch 9 characterization results were previously reported. An Extraction-Scrub-Strip (ESS) test was performed to determine cesium distribution ratios (D_(Cs)) and cesium concentration in the strip effluent and decontaminated salt solution (DSS) streams; this data will be used by Tank Farm Engineering to project a cesium decontamination factor (DF). This test used actual Tank 21H material, and a blend solvent prepared by SRNL that mimics the solvent composition currently being used at the Modular Caustic-Side Solvent Extraction Unit (MCU). The ESS test showed acceptable performance with an extraction D_(Cs) value of 52.4. This value is consistent with results from previous salt batch ESS tests using similar solvent formulations. This compares well against the predicted value of 56.5 from a recently created D_(Cs) model