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Division Spotlight
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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!
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Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Edward F. Splitt, Won-Ho Choe
Fusion Science and Technology | Volume 18 | Number 2 | September 1990 | Pages 273-280
Technical Paper | Plasma Heating System | doi.org/10.13182/FST90-A29299
Articles are hosted by Taylor and Francis Online.
A Monte Carlo simulation is developed to model minority ion transport and fundamental-mode (n = 1) ion cyclotron resonance heating (ICRH) in asymmetric magnetic field geometries. A discrete event model is used to superimpose resonance-heated nonadiabatic changes in a test ion's magnetic moment on a Coulomb pitch angle scattering model. The ion drift orbit equations of motion are set in a magnetic flux coordinate system that separates fast motion along the field lines from slow motion across the lines. The effects of ICRH on minority ion transport are investigated for 3He in stellarator plasmas. The energy distribution functions of these radio-frequency (rf)-heated ions develop high-energy tails as a result of a preferential gain in velocity in the direction perpendicular to the ambient magnetic field. Estimates of neoclassical flux surface diffusion coefficients indicate that ion losses in an rf-heated stellarator plasma can be an order of magnitude larger than non-ICRH losses. This can be attributed to an rf-increased fraction of trapped ions, which results in increased neoclassical transport across the toroidal flux surfaces.