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Abstract

Engineered clay barriers are proposed in the conceptual design of radioactive waste repositories in many countries since most clay types, especially smectites, have a very low hydraulic conductivity and exhibit excellent retardation capabilities for cationic radionuclides. Developed a model that describes the evolution of the microstructure of buffer clay prepared by compacting air-dry MX-80 powder under common pressure and saturating it with water under confined conditions. The derived models and parameters will assist in interpretation of bulk laboratory and field data from experiments on MX-80 clay and similar buffer materials, and selection of a suitable repository design. Most importantly, parameter variation can be made for optimizing the sealing ability of buffers and backfills.

Additional information

Authors: CLAT TECHNOLOGY (SE), ;VTT CHEMICAL TECHNOLOGY (FI), ;ZSR, ;UNIVERSITY OF HANNOVER (DE), ;KTH, ;DEPARTMENT OF CHEMISTRY (SE),
Bibliographic Reference: EUR 18950 EN (1999), 121pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-7312-9
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