Abstract
We have developed a chemical separation technique that allows the radiochemical determination of the californium α-decay content in Department of Energy (DOE) high level wastes from the Hanford and Savannah River sites. The chemical separation technique uses a series of column extraction chromatography steps that use Eichrom Industries' lanthanide and actinide +3 oxidation state selective Ln-resin® and the transuranic selective +4 oxidation state TRU-resin® to obtain intermediate product phases in dilute nitric acid. The technique has been demonstrated on three types of authentic DOE high and low level waste samples. We obtain discrimination from Pu α-activity by a factor of over 200 and from 244Cm α-activity by a factor approaching 1700. Californium recoveries are measured by addition of a 249Cf spike and are in the range of 50% to 90% in the synthetic samples and are in the range of 1.4% to 48% for the authentic DOE waste samples.
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