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Hygrothermal Performance of an Engineered Clay Barrier

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Abstract

A series of laboratory experiments was conducted to establish the heat-induced moisture movement in a bentonitic clay buffer. The buffer material is proposed as an engineered barrier to isolate a heat-emitting high-level nuclear fuel waste container from its emplacement borehole located in a deep rock repository. In the experimental simulation, the hygrothermal phenomena are initiated by a cylindrical heater placed within the compacted buffer material in a borehole centrally located in a granite block. The experimental results illustrate the time-dependent distribution of temperatures within the rock mass and the residual moisture distribution at the termination of the experiment.

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Acknowledgments

This work was funded by the CANDU Owner's Group (COG).

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Authors and Affiliations

  1. Department of Civil Engineering, Carleton University Ottawa, Ontario, Canada, K1S 5B6

    A. P. S. Selvadurai

  2. AECL Research, Uhiteshell Laboratories, Pinawa, Manitoba, Canada, R0E 1L0

    S. C. H. Cheung

Authors
  1. A. P. S. Selvadurai
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  2. S. C. H. Cheung
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Selvadurai, A.P.S., Cheung, S.C.H. Hygrothermal Performance of an Engineered Clay Barrier. MRS Online Proceedings Library 212, 475–481 (1990). https://doi.org/10.1557/PROC-212-475

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  • DOI: https://doi.org/10.1557/PROC-212-475

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