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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.V. Golubev, S.V. Razin, A.V. Vodopyanov, V.G. Zorin
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 288-291
Oral Presentations | doi.org/10.13182/FST99-A11963869
Articles are hosted by Taylor and Francis Online.
Essential increase of operation efficiency of electron cyclotron resonance (ECR) multi-charged ion (MCI) sources (that is the increase of the average charge number and current of ion beams) is connected with possibility to achieve more dense plasma and to achieve so called quasi-gasdynamic regime of the plasma confinement in mirror traps using RF radiation with higher frequency. Results of experimental investigation of ion charge state distribution in a pulsed ECR source of MCI with pumping by millimeter wave radiation of powerful gyrotron are presented in the paper. Millimeter wave radiation with maximum power W=130 kW, frequency f=37.5 GHz and pulse duration up to 1.5 ms is used in the experiments. The charge state distribution maximum corresponded to argon charge (+13)-(+15). Total ion saturation current density of the probe achieved 2 A/cm2.