ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Mathematics & Computation
Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
June 2025
Nuclear Technology
Fusion Science and Technology
May 2025
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.
Kiyoshi Yoshikawa, Yasushi Yamamoto, Hisayuki Toku, Akira Kobayashi, Toru Okazaki
Fusion Science and Technology | Volume 15 | Number 4 | July 1989 | Pages 1541-1559
Technical Paper | Energy Storage, Switching, and Conversion | doi.org/10.13182/FST89-A25343
Articles are hosted by Taylor and Francis Online.
A 5-yr study of beam direct energy conversion was performed at the Kyoto University Institute of Atomic Energy to clarify the essential features of direct energy recovery from monoenergetic ion beams so that the performance characteristics of energy recovery can be predicted reasonably well by numerical calculations. The study used an improved version of an electrostatically electron-suppressed beam direct converter originally proposed by Lawrence Livermore National Laboratory. Secondary electron suppressor grids were added, and a helium ion beam was used with typical parameters of 15.4 keV, 90 mA, and 100 ms. By adopting negatively biased secondary electron suppressor grids, the energy recovery efficiency increased from 72 ± 4 to 87 ± 6% even at relatively high pressures of 10−2 Pa, based on three independent measurements of the incident ion current, including a newly developed “in situ” measurement by a Rogowski coil sensor. The operational region could also be extended to more high-pressure regions. A comparison of experimental results with numerical results by the two-dimensional Kyoto University Advanced DART (KUAD) code, including evaluation of atomic processes, shows excellent agreement. Adoption of the mesh-type electron suppressor instead of the solid suppressor results in further improvements in the beam direct energy recovery.
