Separation of Am-Cm from NaNO/sub 3/ waste solutions by in-canyon-tank precipitation as oxalates
- 1 September 1981
- report
- Published by Office of Scientific and Technical Information (OSTI)
Abstract
A process for the purification of Am-Cm residues was developed specifically for application in Savannah River Plant (SRP) canyon tanks. These Am-Cm residues were collected from several campaigns to produce plutonium containing high isotopic concentrations of /sup 240/Pu. An initial purification from Al/sup 3 +/ had already been accomplished by a solvent extraction process. The product of this process was contaminated with NaNO/sub 3/ as a result of entrainment of the solvent extraction NaNO/sub 3/ scrub solution. To produce an acceptable feed solution for a later pressurized cation exchange chromatography separation and purification step, the bulk of the NaNO/sub 3/ must be removed. This purification process includes formic acid denitration, adjustment of contaminating cations by evaporation and water dilution, and oxalate precipitation of the actinides and lanthanides.Keywords
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