Americium plant test

Cold pilot-plant tests are presently in progress using 2-inch diameter pulsed plate columns in continuous countercurrent flow. Synthetic Zr-Al high-level waste loaded with 0.2 g/L Ce(III) is being used as feed and 20 volume % DHDECMP in 2 1 decalin-DIPB as extractant. Cerium is being used as an americium simulant. To date, three complete cycles have been run including a solvent recycle wash with Na2C03. No major problems have been encountered. 

Results of the pilot plant test of the 1iquid-1iquid solvent extraction test are shown in Table V. Only k Z of approximately 17 of americium strip product were used in the precipitation step. Decontamination from A1 and Mg was excel-... 

Fig. 7-12. Concentration ratios (ie, soil-to-plant transfer factors) for plutonium and americium at various sites associated with the US nuclear programme. Key to sites NTS, Nevada test site SR, Savannah River, South Carolina OR, Oak Ridge, Tennessee RF, Rocky Flats, Colorado NTS, Enewetak Atoll, South Pacific (from Dahlman et al., 1976).

Pilot plant scale testing of the extraction chromatography process is currently in progress at Rocky Flats Plant. When adequate testing of both the solvent extraction and extraction chromatography methods has been accomplished, the methods will be compared to see which has the greatest promise for recovering the americium from special MSE residues. 

There are many examples of the studies on SLM for nuclear applications in the literature. SLMs were tested for high-level radioactive waste treatment combined with removal of actinides and other fission products from the effluents from nuclear fuel reprocessing plants. The recovery of the species, such as uranium, plutonium, thorium, americium, cerium, europium, strontium, and cesium, was investigated in vari-ons extracting-stripping systems. Selective permeation... 

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