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The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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Proving DRACO will deliver
The United States is now closer than it has been in over five decades to launching the first nuclear thermal rocket into space, thanks to DRACO—the Demonstration Rocket for Agile Cislunar Orbit.
C. R. Walthers, E. M. Jenkins, D. W. Sedgley, T. H. Batzer, S. Konishi, S. O'Hira, Y. Naruse
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1811-1813
Impurity Control and Plasma-Facing Component | Proceedings of the Ninth Topical Meeting on the Technology of Fusion Energy (Oak Brook, Illinois, October 7-11, 1990) | doi.org/10.13182/FST91-A29606
Articles are hosted by Taylor and Francis Online.
In 1988, a prototypical vacuum system was added to the Tritium Systems Test Assembly (TSTA) at Los Alamos National Laboratory. Since then various pumping scenarios, which might be expected in a fusion reactor, have been performed without any serious shortcomings being apparent in the use of compound cryopumps as reactor high vacuum pumps. Last year, the question of whether a compound pump was necessary was addressed in a pair of runs in which deuterium helium mixtures were pumped on a single 4K activated charcoal panel. In these tests, the condensing stage of the pump was maintained at 77K and did not contribute to pumping either deuterium or helium. Results were very encouraging: in both tests the charcoal readily pumped helium until a max loading of 0.4 T 1 cm−2 of helium on charcoal was attained. Helium speed was not affected by deuterium which may have been pumped by either a condensing or sorbing mechanism or by a combination of both. In addition, the helium loading at saturation was 0.4 T 1 cm−2 even though the D2/He ratio was doubled between runs. Conjecture about why the charcoal helium capacity was constant led to the pump operation described in this paper. It was felt that measurement of helium capacity after careful deuterium preloads might help to explain the mechanism involved in co-pumping of a condensible and a noncondensible on a single 4K cryosorber surface. This paper presents the results of series of helium capacity runs preceded by a range of deuterium preloads and attempts to explain the mechanism involved.