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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
G. J. Bernstein, D. E. Grosvenor, J. F. Lenc, N. M. Levitz
Nuclear Technology | Volume 20 | Number 3 | December 1973 | Pages 200-202
Technical Note | Chemical Processing | doi.org/10.13182/NT73-A31358
Articles are hosted by Taylor and Francis Online.
A centrifugal contactor of unique design has been developed for solvent extraction processing of high-plutonium-content fuels. The unit has a vertically suspended rotor that has a 4-in. inside diameter and is 15 in. long (with a 12-in.-long separating zone). Aqueous and organic phases are fed into the annulus between the contactor casing and the spinning rotor and are mixed by skin friction. The mixture flows down the annulus and then up through an orifice in the bottom of the rotor. The phases are separated by centrifugal force as they flow up the inside of the rotor and are discharged at the top. Separating capacities (throughput) ranged from 4.5 gal/min at 2000 rpm to 15 gal/min at 3500 rpm. Essentially 100% stage efficiency was demonstrated in extraction and stripping of uranium between nitric acid and 30% tri-n-butyl phosphate in n-dodecane diluent. The basic annular-mixer design is suitable for contactors with larger or smaller diameters.