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A key issue for the permanent disposal of high level waste is the development of predictive models for the long-term performance. These models have to be based on a reliable database and a sound scientific understanding of the phenomena of importance for long term storage. The work performed in the laboratories of the author deals with property measurements on three waste glasses doped with either 0.5 or 1.5 weight % (244)Cm and stored for up to 10 years. The properties, measured as a function of time (damage level), were volume changes (swelling), leaching behaviour, hardness, Young's modulus and fracture toughness, and He release. The results are compared with literature data on other waste glasses and with results from ion implantation. It is shown that, within the parameter range investigated, no significant negative effects of alpha-decay were observed.

Additional information

Authors: MATZKE H, JRC Karlsruhe (DE)
Bibliographic Reference: Paper presented: CEA-Valrho Summer Workshop, Scientific Research for High-Performance Containment, Méjanne le Clap (FR), August 31-September 7, 1997
Availability: Available from (1) as Paper EN 41079 ORA
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