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A research activity to develop a suitable treatment and conditioning process for spent solvent, issuing from a reprocessing plant, is described. The potentialities of the combination of distillation with wet-oxidation by hydrogen peroxide have been investigated. The result of the distillation is the reduction of the waste volume, producing a non-contaminated distillate (mainly kerosene and alchyl-benzenes), to be incinerated conventionally without containment, and a bottom residue (tributyl-phosphate and tri-caprylamine), containing all the activity, to be treated by wet-oxidation. The result of the wet-oxidation is the transformation, at low temperature and pressure, of the spent organic material into inorganic substances in aqueous solution. The oxidative decomposition of TBP and TCA produces mainly carbon dioxide, water, and phosphoric and nitric acids. The research programme has been carried out in the framework of the five year EC programme (1990-94) on management and storage of radioactive waste. All the experimental tasks are described and the main achievements are reported.

Additional information

Authors: LUCE A, ENEA-Eurex, Saluggia (IT);TROIANI F, ENEA-Eurex, Saluggia (IT)
Bibliographic Reference: EUR 16196 EN (1995) 80 pp., FS, ECU 10
Availability: (2)
ISBN: ISBN 92-827-0151-4
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