AN EXPERIMENTAL STUDY OF FACTORS IN THE RECOVERY OF PLUTONIUM FROM COMBUSTIBLE WASTES TREATED BY INCINERATION, PYROLYSIS AND OTHER PROCESSES
e.g. PuO-2, Pu(NO-3)-4, (U, The work described in this report is concerned with the incineration and pyrolysis of plutonium contaminated combustible wastes, the leaching of the ashes and chars and the subsequent treatment of the leach solutions. A range of ashes and chars have been prepared from a range of plutonium contaminated materials covering a variety of combustible materials (e.g. PVC, neoprene, Hypalon) and plutonium contaminants Pu)O-2]. Treatment temperatures in the range of 550- 900 degrees C have been investigated, the best results being obtained at or below 700 degrees C with pyrolysis followed by char oxidation being the favoured process. A number of methods for treatment of the leach solutions have been considered and some have been investigated experimentally. Extraction of plutonium and americium with tributylphosphate (TBP) from a leach solution conditioned to 0.1 M H**+ / 5 M NO**-3- has been studied. The key stage has been found to be the conditioning step where precautions must be taken to ensure that plutonium containing precipitates and non-extractable plutonium are not formed. Consideration has also been given to treatment of the americium-containing raffinates from a high acid TBP extraction and some methods have been investigated. A range of simple washing experiments have been carried out in order to compare the process with incineration - pyrolysis.
Bibliographic Reference: EUR 9302 EN (1984) FS, 171 P., BFR 550, EUROFFICE, LUXEMBOURG POB 1003
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Record Number: 1989123019200 / Last updated on: 1987-01-01
Available languages: en