Engineering topics

Hebden, Andrew S.

Publications and source records attributed to Hebden, Andrew S..

3 records

DOE OSTI2015

UV-Vis Spectroscopy as a Tool for Safeguards; Instrumentation installation and fundamental data collection

Two spectrophotometric process monitors, one optimized for high concentration (approximately 10 g/L) and one for trace levels (approximately 10 ppm),were developed at Argonne and installed at the SRS H-Canyon facility for field testing. These systems were built of Commercial-Off-The-Shelf components utilizing a custom, facility-specific hardware interface. The systems directly provide a qualitative measurement of process chemistry (i.e. valence state). With appropriate calibrations the systems could provide quantitative data. Laboratory tests were performed to determine the spectrophotometric molar absorptivity coefficients for relevant actinide and transition metals of interest.

36 MATERIALS SCIENCE↗

DOE OSTI2013

Documenting Dual-Column Experiment with Mini-SHINE Solution

Argonne National Laboratory (Argonne) is assisting SHINE Medical Technologies (SHINE) in developing a production method and recovery and purification processes for molybdenum 99 (Mo-99) using an accelerator-driven, subcritical target consisting of an aqueous uranyl-sulfate solution. An integral part of the process is the development of a column for the separation and recovery of Mo-99, followed by a concentration column to reduce the product volume from 15–25 L to <1 L prior to entry into the low-enriched uranium (LEU)-Modified Cintichem purification process. Argonne has developed plant-scale column designs for the initial Mo-recovery column and the concentration column.

Stepinski, Dominique C.↗

DOE OSTI2010

Mechanical Stability Study

Argonne National Laboratory (Argonne), in collaboration with the BioSeparations Laboratory at Purdue University, is helping Babcock and Wilcox Technical Services Group develop the Medical Isotope Production System (MIPS), which will use an aqueous homogenous reactor (AHR) for the domestic production of 99 Mo. Roughly 200 L of low enriched uranium (LEU, 19.75% U-235) as a uranyl nitrate solution will be irradiated and passed through a column, which has been pre-equilibrated with nitric acid, for 2 hours. Column sizes have been predicted for the plant-scale production of 99 Mo by using Purdue University’s Versatile Reaction Separation (VERSE) simulator and experimental data provided by Argonne. In the plant, these columns will undergo multiple loading/washing/stripping cycles to purify 99 Mo from batches of irradiated LEU solutions. Since the previous report was distributed, the selection of sorbents to be used in the columns has been reduced to three titania-based sorbents. This report describes the results from mechanical stability studies that were performed to test the pressure drop and sorbent resistance to stress under relevant process conditions.

Krahn, Elizabeth O.↗