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
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
September 2024
Nuclear Technology
August 2024
Fusion Science and Technology
Latest News
Construction begins on Kairos’s fluoride salt–cooled test reactor
Earlier today, on a site in Oak Ridge, Tenn., that was formerly home to the K-33 Gaseous Diffusion Plant, Kairos Power marked the start of construction on its low-power demonstration reactor. Named Hermes, the 35-MWt test reactor claims status as the first Gen IV reactor to be approved for construction by the Nuclear Regulatory Commission and the first non–light water reactor to be permitted in the United States in more than 50 years.
M. Matsukawa, H. Ninomiya, H. Horiike, N. Hosogane, R. Yoshino
Fusion Science and Technology | Volume 21 | Number 3 | May 1992 | Pages 1624-1629
Plasma Engineering | doi.org/10.13182/FST92-A29952
Articles are hosted by Taylor and Francis Online.
This paper describes the design modifications to the plasma feedback control system, including power supply, for the Upgrade of JT-60. One of the major design issues was to be able to change the kind of control command for the thyristor converter from voltage to current and vice versa at any time during the discharge. Another one was to adopt a faster control system with 250µs response for stabilization of plasma vertical position, even in plasmas with high elongation of 1.8. These modifications improved the plasma controllability especially at initiation and made protecting the poloidal field coil system easier when the plasma disrupts. The high flexibility of the control system led to the achievement of a 4MA plasma after only 2 weeks of JT-60U operation.