Test Plan for Solvent Extraction Data Acquisition to Support Modeling Efforts

Rutledge, Veronica ; Christensen, Kristi ; Garn, Troy ; Law, Jack

Idaho National Laboratory

关键词: Modeling;    Mass Transfer;    Diffusion;    Truex Process;    Coalescence;   

DOI  :  10.2172/1009152
RP-ID  :  INL/EXT-10-20687
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1009152

美国|英语

来源: UNT Digital Library

【 摘 要 】

This testing will support NEAMS SafeSep Modeling efforts related to droplet simulation in liquid-liquid extraction equipment. Physical characteristic determinations will be completed for the fluids being used in the experiment including viscosity, density, surface tension, distribution coefficients, and diffusion coefficients. Then, experiments will be carried out to provide data for comparison to the simulation’s calculation of mass transfer coefficients. Experiments will be conducted with solutions used in the TRansUranic EXtraction (TRUEX) process extraction section. The TRUEX process was chosen since it is one solvent extraction system currently proposed for the separation of actinides and lanthanides from used nuclear fuel, it is diffusion limited, testing can be performed using non radioactive lanthanides to evaluate mass transfer. The extraction section involves transfer of one or more lanthanide species from an aqueous solution to an organic solvent. Single droplets rising by buoyancy will be studied first. Droplet size and number of species transferred will be varied independently to provide mass transfer coefficients as a function of each variable. An apparatus has been designed specifically for these experiments. In order to get more accurate measurements of droplet size, contact time, time of droplet formation, and possibly droplet breakup and coalescence, a high speed camera will be utilized for these experiments. Other potential experiments include examining the effects of jetted droplets and shear flow on the mass transfer coefficients.