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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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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.
Tsunetaka Banba, Takashi Murakami
Nuclear Technology | Volume 70 | Number 2 | August 1985 | Pages 243-248
Technical Paper | Radioactive Waste Management | doi.org/10.13182/NT85-A33648
Articles are hosted by Taylor and Francis Online.
Soxhlet-type leaching experiments were carried out for 200 days and the leaching solutions analyzed by inductively coupled plasma spectroscopy and atomic absorption spectroscopy. The data of the solution analysis and the results of our previous study on the surface layers revealed the fact that elements in the waste glass were classified into three groups and were released into solution in accordance with the following mechanisms: Group I contained sodium, cesium, potassium, boron, and molybdenum; the release of the group I elements was controlled by diffusion and decomposition processes in the glass. Group II contained manganese, iron, nickel, zirconium, yttrium, lanthanum, cerium, neodymium, samarium, and dysprosium; the release of the group II elements was controlled by solubility of the sheet silicate formed in the surface layers. Group III contained silicon, aluminum, calcium, strontium, barium, magnesium, and chromium; the release of the group III elements was controlled by diffusion and decomposition processes in the glass, and was also affected by formation of the sheet silicate.