Combining extractant systems for the simultaneous extraction of transuranic elements and selected fission products

Conference · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5202072

Horwitz, E P

A stand alone acid-side SX process for removal of uranium and transuranic elements (Np, Pu, Am) from nuclear waste (TRUEX) has been widely reported in the last five years. Recently, an acid-side SX process to extract and recover {sup 90}Sr from high-level nuclear waste (SREX) has also been reported. Both the TRUEX and SREX processes extract {Tc} to a significant extent although not as efficiently as TRUs and Sr. Ideally, one would like to have a process that can extract and recover all actinides, as well as {sup 99}Tc, {sup 90}Sr and {sup 137}Cs. Such a process would remove the most toxic long-lived isotopes as well as the long-lived fission product that readily migrates and the major heat producing isotopes. The basic problem in designing an SX system to remove such a wide range of elements is that no single ligand is capable of coordinating selectively to elements with such widely differing chemical properties. Possible solution to multielement extraction is to mix two extractants with totally different properties into a single process solvent formulation. 2 figs., 3 tabs., 4 refs.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5202072
• Report Number(s): ANL/CP-73631; CONF-9107153-2; ON: DE91018546
• Resource Relation: Conference: Hanford separations workshop, Richland, WA (United States), 23-25 Jul 1991
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
CESIUM 137
SOLVENT EXTRACTION
STRONTIUM 90
TECHNETIUM 99
TRANSURANIUM ELEMENTS
URANIUM
HIGH-LEVEL RADIOACTIVE WASTES
MIXED SOLVENTS
TRUEX PROCESS
ACTINIDES
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CESIUM ISOTOPES
DISPERSIONS
ELEMENTS
EVEN-EVEN NUCLEI
EXTRACTION
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATERIALS
METALS
MIXTURES
NUCLEI
ODD-EVEN NUCLEI
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
RADIOISOTOPES
SEPARATION PROCESSES
SOLVENTS
STRONTIUM ISOTOPES
TECHNETIUM ISOTOPES
WASTES
YEARS LIVING RADIOI
YEARS LIVING RADIOISOTOPES
400105* - Separation Procedures
052001 - Nuclear Fuels- Waste Processing