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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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Fusion Science and Technology
Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Franco Alladio, Paola Batistoni, Alessandro Mancuso
Fusion Science and Technology | Volume 22 | Number 4 | December 1992 | Pages 474-481
Alpha-Particle Special | doi.org/10.13182/FST92-A30083
Articles are hosted by Taylor and Francis Online.
The properties of alpha-particle confinement of l = 2 stellarat ors have been studied as a function of the aspect ratio (3 < R/a < 12). A collisionless orbit calculation has been performed numerically for stellarator configurations obtained by winding the helical currents on circular-cross-section tori with a constant pitch in toroidal coordinates. All the configurations studied exibit pronounced separatrixlike features that also rotate with constant pitch in toroidal coordinates. The fraction of alpha particles contained within the last closed magnetic surface rapidly increases with the aspect ratio and is >80% for R/a > 4. The escaping alpha particles cross the separatrix within narrow helical strips around the X-point path when it is between the inboard and the top of the torus. The particle motion is also followed outside the last closed magnetic surface. When the boundary (i.e., the surface where the helical currents flow) is sufficiently far from the plasma, the escaping alpha particles are found to remain trapped in the X-point region.