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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.
R. E. Olson, G. A. Chandler, M. S. Derzon, D. E. Hebron, J. S. Lash, R. J. Leeper, T. J. Nash, G. E. Rochau, T. W. L. Sanford, N. B. Alexander, C. R. Gibson
Fusion Science and Technology | Volume 35 | Number 2 | March 1999 | Pages 260-265
Technical Paper | doi.org/10.13182/FST99-A11963934
Articles are hosted by Taylor and Francis Online.
We describe designs of hohlraums and capsules for both ignition (∼1–10 MJ) and high yield (up to ∼200 MJ) Z-pinch driven indirect-drive ICF concepts. Two potential Z-pinch hohlraum configurations – 1) the “static wall” or “on-axis” hohlraum; and 2) the “imploding liner” or “dynamic” hohlraum – are considered. Both concepts involve cryogenic, DT-filled capsules (∼2–4 mm in diameter) with Be or CH ablators (O, F, and Cu are currently being considered as dopants). Both types of hohlraums involve a Helium and/or CH foam fill. In the static wall hohlraum concept, the ICF capsule is isolated from the x-ray generation region. Advantages in the areas of capsule drive symmetry and diagnostic access might be gained from this arrangement. In the dynamic hohlraum, the ICF capsule has a direct view of the stagnation radiation. The potential advantage would result from the higher x-ray intensity and larger total capsule absorbed energy.