Organic Separation Test Results

Russell, Renee L. ; Rinehart, Donald E. ; Peterson, Reid A.

关键词: Organic compounds;    complexants;    solvents;    simulant;   

DOI  :  10.2172/1158501
RP-ID  :  PNNL-23643
RP-ID  :  RPT-66611-001 Rev 0.
PID  :  OSTI ID: 1158501
Others  :  Other: 830403000

美国|英语

来源: SciTech Connect

【 摘 要 】

Separable organics have been defined as ???those organic compounds of very limited solubility in the bulk waste and that can form a separate liquid phase or layer??? (Smalley and Nguyen 2013), and result from three main solvent extraction processes: U Plant Uranium Recovery Process, B Plant Waste Fractionation Process, and Plutonium Uranium Extraction (PUREX) Process. The primary organic solvents associated with tank solids are TBP, D2EHPA, and NPH. There is concern that, while this organic material is bound to the sludge particles as it is stored in the tanks, waste feed delivery activities, specifically transfer pump and mixer pump operations, could cause the organics to form a separated layer in the tank farms feed tank. Therefore, Washington River Protection Solutions (WRPS) is experimentally evaluating the potential of organic solvents separating from the tank solids (sludge) during waste feed delivery activities, specifically the waste mixing and transfer processes. Given the Hanford Tank Waste Treatment and Immobilization Plant (WTP) waste acceptance criteria per the Waste Feed Acceptance Criteria document (24590-WTP-RPT-MGT-11-014) that there is to be ???no visible layer??? of separable organics in the waste feed, this would result in the batch being unacceptable to transfer to WTP. This study is of particular importance to WRPS because of these WTP requirements.