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The research programme objectives are to set up a treatment with inorganic exchangers which aims at reducing by at least a factor of 10 the released activity of strontium 90, antimony 125 and ruthenium 106 in effluents, which have been already treated by chemical precipitation in the COGEMA reprocessing plant in La Ague (in case of an increase of pollution release into the Channel). The best removal of strontium and antimony is achieved by the metatitanic acid (trade name G3). The treatment can be performed in one step at pH 9 with a strontium decontamination factor (DF) of the order of 15 and an antimony DF close to 30, or in two steps at pH 12 (strontium removal), then at pH 5 (antimony removal) with higher DFs. Sodium borohydrure (SBH) and copper allow ruthenium decontamination with a DF close to 20. The addition of metals in acidic media is less efficient (DF of the order of 10). A three step treatment has been proposed. Solid-liquid separation can be achieved by a microfiltration process using a Carbosep M20 membrane. Finally, the treatment has been investigated for a 5 litre active effluent as an efficiency proof of the study.

Additional information

Authors: FEDERICI V, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);TAMBURINI A, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR);LILLO M, CEA, CEN Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: EUR 16842 FR (1996) 93pp., FS, ECU 11.50
Availability: Available from the (2)
ISBN: ISBN 92-827-6466-4
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