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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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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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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.
Hiroshi Noguchi
Fusion Science and Technology | Volume 27 | Number 2 | March 1995 | Pages 56-61
doi.org/10.13182/FST95-A11963805
Articles are hosted by Taylor and Francis Online.
The conversion reaction of tritium gas to tritiated water in dry air has been studied using low–concentration tritium gases which have three different hydrogen isotope compositions. The conversion was directly proportional to a ratio of radioactivity of T2 to that of total tritium. This demonstrates that the T2 decay process is predominant for the conversion reaction at low initial tritium concentrations. First-order rate constants for the reaction in dry air are found to be independent of initial tritium concentration. A model to predict the rate constant of the production of tritiated water from T2 in dry air has been developed. The modeling results show that the T2 decay process is predominant at low concentrations, while O+ and N2+ ions formed through tritium beta-ray induced reactions play important roles at high concentrations.