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Experimental modelling of the near-field thermal regime in a nuclear-fuel waste disposal vault |
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| Authors: | HS Radhakrishna KC Lau AM Crawford |
| Institution: | 1Ontario Hydro, Civil Research, Toronto, Ont. M8Z 5S4, Canada 2Department of Civil Engineering, University of Toronto, Toronto, Ont. M5S 1A4, Canada |
| Abstract: | Experiments have been performed to study the thermal performance of a backfilled disposal vault in which the waste containers are emplaced in boreholes and surrounded by a bentonitesand buffer. The near-field thermal regime in a buffer-backfill disposal vault in which the nuclear fuel waste is emplaced in canisters, is studied by one-eight scale experimental models. The thermal performance of the buffer and backfill are examined in a thermal drying environment prior to the ground water recharge of the disposal vault. The formation of shrinkage cracks in the buffer due to drying and the response of these shrinkage cracks to the rewetting condition and their influence on the near-field thermal regime are assessed. |
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