From the point of view of clear demonstration of long-term safety, some of the long-lived intermediate-level wastes (ILW) are probably the most challenging of all waste types. Repository concepts for such wastes are reviewed with respect to optimization of operational procedures, post-closure performance, ease of making the safety case and costs. In particular, the advantages of designs incorporating a hydraulic cage and partitioning of wastes with different properties are discussed.
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McKinley, I.G., Kawamura, H., Neall, F.B. et al. Repository Design Optimization for Long-Lived ILW. MRS Online Proceedings Library 663, 843 (2000). https://doi.org/10.1557/PROC-663-843