RUTHERFORD BACKSCATTERING TO MEASURE CORROSION LAYERS ON GLASSES FOR LONG-TERM STORAGE OF RADIOACTIVE WASTE
The method considered safest for isolation of nuclear waste is vitrification (solidification in a glass - or glass ceramic - matrix) with long-term storage in stable geological repositories. Borosilicate glasses are candidates for this purpose on a worldwide scale. Though it is very unlikely that water will ever have access to these repositories, the leaching (corrosion in aqueous solutions) of glasses is studied. Rutherford backscattering of beams of charged particles (e.g. He ions of 2-3 MeV energy) is shown to be a versatile technique to study surface layers and to obtain information on their thickness and composition. The method is non-destructive and can be applied to layers with thicknesses in the range of about 0.1 to 2 mum. Results for nuclear waste glasses leached in H-2O or in quinary salt solution (Q-brine) with and without presence of material from the metal container are presented. Presence of steel is shown to greatly enhance leaching rates by preventing glass components to become saturated in the leachant.
Bibliographic Reference: 3. ARBEITSTAGUNG ANGEWANDTE OBERFLAECHENANALYTIK JUELICH (GERMANY), MAY 8-11, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31714 ORA
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Record Number: 1989123006600 / Last updated on: 1987-01-01
Available languages: en