Combined TRU-Sr extraction/recovery process

Technical Report · Thu Sep 09 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10109778· OSTI ID:10109778

Horwitz, E. Philip; Dietz, Mark L.; Diamond, Herbert; Leonard, Ralph A. ^[1]; Rogers, Robin D. ^[2]

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1. Argonne National Lab., IL (United States)
2. Northern Illinois Univ., De Kalb, IL (United States)

The combined TRU-SR extraction/recovery process is a new solvent extraction process that is designed to extract uranium, neptunium, plutonium, americium, strontium, and technetium from dissolved sludge obtained from Hanford waste storage tanks. The process utilizes a solvent formulation consisting of 0.2 M octyl(phenyl)-N,N-diisobutyl-carbainoylmethylphosphine oxide (CMPO), 0.2 M 4,4 inches (5 inches)-di-t-butylcyclohexanol8-crown-6 (DtBuCH18C6),-and 1.2 M diamyl amylphosphonate (DA[AP]) in an isoparaffinic hydrocarbon diluent. Distribution ratios of Am, Sr, and {Tc} (the least extractable constituents) from synthetic waste containing 3 M HN0{sub 3} are 40, 8, and 3, respectively. Selective backextraction of Np, Pu, Am, and Sr from U and {Tc} is achieved using a new carboxylic acid reagent. Uranium and technetium backextraction is achieved with 0.25 M Na{sub 2}CO{sub 3}. A flowsheet has been designed for testing the combined process in high speed centrifugal contactors. Synthetic dissolved sludge waste spiked with U, TRUs, {sup 85}Sr and {sup 99m}{Tc} will be used as the feed. A sufficient number of stages are utilized to remove > 99.99% of the TRUs and Sr and > 90% of the {Tc}.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10109778
• Report Number(s): ANL/CHM/CP-75735; CONF-930945-4; ON: DE93003979
• Resource Relation: Other Information: PBD: [1992]
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HIGH-LEVEL RADIOACTIVE WASTES
RADIOACTIVE WASTE PROCESSING
ALPHA-BEARING WASTES
URANIUM
SOLVENT EXTRACTION
NEPTUNIUM
PLUTONIUM
AMERICIUM
STRONTIUM
TECHNETIUM
HANFORD RESERVATION
ORGANIC SOLVENTS
NITRIC ACID
FLOWSHEETS
EXPERIMENTAL DATA
ORGANIC PHOSPHORUS COMPOUNDS
052001
400105
WASTE PROCESSING
SEPARATION PROCEDURES