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Fusion Science and Technology
Latest News
Retrieval of nuclear waste canisters from a borehole
Borehole disposal of spent nuclear fuel (SNF) and high-level waste (HLW) uses off-the-shelf directional drilling technology developed and commercialized by the oil and gas sectors. It is a technology that has been gaining traction in recent years in the nuclear industry. Disposal can be done in one or more boreholes (including an array) drilled into suitable sedimentary, igneous, or metamorphic host rocks. Waste is encapsulated in specialized corrosion-resistant canisters, which are placed end to end in disposal sections of relatively small-diameter boreholes that have been cased and fluid-filled. After emplacement, the vertical access hole is plugged and backfilled as an engineered barrier.
S.T. McKillip, C.E. Bannister, E.A. Clark
Fusion Science and Technology | Volume 21 | Number 2 | March 1992 | Pages 1011-1016
Material; Storage and Processing | doi.org/10.13182/FST92-A29884
Articles are hosted by Taylor and Francis Online.
A prototype hydride storage bed was fitted with strain gages to measure strains occurring in the stainless steel bed vessel caused by expansion of the storage powder upon uptake of hydrogen. The strain remained low in the bed as hydrogen was added, up to a bed loading of about 0.5 hydrogen to metal atom ratio. The strain then increased with increasing hydrogen loading, up to the maximum loading ratio of ∼0.8. Different locations exhibited greatly different levels of maximum strain, suggesting that the powder does not flow as a fluid would to equalized the pressure. In no case was the design stress of the vessel exceeded.