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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
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
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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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.
J. Miyazawa, H. Yamada, R. Sakamoto, H. Funaba, K. Y. Watanabe, S. Sakakibara, K. Ida, M. Goto, T. Morisaki, S. Murakami, S. Inagaki, LHD Experiment Group
Fusion Science and Technology | Volume 58 | Number 1 | July-August 2010 | Pages 29-37
Chapter 3. Confinement and Transport | Special Issue on Large Helical Device (LHD) | doi.org/10.13182/FST10-A10790
Articles are hosted by Taylor and Francis Online.
Global energy confinement in the Large Helical Device has been proved to be comparable to those of tokamaks in ELMy H-mode. It shows a gyro-Bohm-like property as seen in international stellarator scalings. This implies that the anomalous transport dominates the neoclassical transport. At least in the configurations with small helical ripples, no significant collisionality dependence predicted by the neoclassical theory has been observed. Confinement degradation compared with the international stellarator scalings often takes place in the plasmas with high peripheral density. In many cases, this is due to the shallow penetration of heating beams. Adding to this, deviation from gyro-Bohm can be caused by the emergence of a "weak temperature dependence" of the thermal diffusivity. It depends on the plasma parameters whether this weak temperature dependence deteriorates or improves the thermal transport. The central pressure that is also an important parameter for envisioning a fusion reactor is not necessarily proportional to the global confinement. The central pressure is insensitive to the variation of magnetic configuration that strongly affects the global confinement.