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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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International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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
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Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Junichi Miyazawa, Suguru Masuzaki, Hiroshi Yamada, Ryuichi Sakamoto, Byron Jay Peterson, Mamoru Shoji, Nobuyoshi Ohyabu, Akio Komori, Osamu Motojima, LHD Experimental Group, Peter Grigull, Yuehe Feng, Kent McCormick, Francesco Sardei, Yuri Igitkhanov, W7-AS Team
Fusion Science and Technology | Volume 50 | Number 2 | August 2006 | Pages 192-200
Technical Paper | Stellarators | doi.org/10.13182/FST06-A1235
Articles are hosted by Taylor and Francis Online.
Self-sustained detachment, named the Serpens mode (Self-regulated plasma edge 'neath the last closed flux surface), has been observed in the Large Helical Device (LHD), which is equipped with an intrinsic open helical divertor, in spite of the low divertor neutral pressure of order 10-3 Pa. Other states of detachment are also observed; one is transient partial detachment, observed only in the gas puff port during massive gas puffing, and another is complete detachment, which takes place when the hot plasma boundary shrinks below the last closed flux surface. The Serpens mode is categorized as a subset of complete detachment, but with large fluctuations in the divertor flux and H signal, which result from a rotating radiation belt called the serpent. In this paper, these are compared with experimental observations of partial detachment and multifaceted asymmetric radiation from the edge (Marfe) in a modular stellarator, Wendelstein 7-AS (W7-AS). There are many similarities between transient partial detachment in LHD and partial detachment in W7-AS and, especially, between the Serpens mode in LHD and Marfe in W7-AS.