BEHAVIOR OF RARE-EARTHS AND ACTINIDES IN SOLUTION DURING AQUEOUS ALTERATION OF R7T7 NUCLEAR WASTE GLASS AT 90-DEGREES-C - INVESTIGATION IN A DYNAMIC LEACHING SYSTEM

Authors
MENARD O ADVOCAT T MICHARD A
Citation
O. Menard et al., BEHAVIOR OF RARE-EARTHS AND ACTINIDES IN SOLUTION DURING AQUEOUS ALTERATION OF R7T7 NUCLEAR WASTE GLASS AT 90-DEGREES-C - INVESTIGATION IN A DYNAMIC LEACHING SYSTEM, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 321(1), 1995, pp. 17-23
Citations number
9
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
321
Issue
1
Year of publication
1995
Pages
17 - 23
Database
ISI
SICI code
1251-8050(1995)321:1<17:BORAAI>2.0.ZU;2-K
Abstract
The dissolution of the CEA's R717 glass by phosphate, carbonate and su lphate solutions was investigated under dynamic conditions. The La, Ce , Nd, Ttl and U concentrations were measured in the leachates before a nd after filtration to 450 and 1.8 nm. The very small fraction of rare earths and thorium entering solution was fixed on colloids. Uranium w as found mainly in free form, and its solubility was enhanced by the p resence of carbonates, which formed stable complexes.