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
August 2024
Nuclear Technology
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.”
Alex Wekhof, Richard R. Smith, Sidney S. Medley
Fusion Science and Technology | Volume 3 | Number 3 | May 1983 | Pages 462-470
Technical Note | Plasma Heating System | doi.org/10.13182/FST83-A20868
Articles are hosted by Taylor and Francis Online.
The peak energy, energy broadening, and neutral current fractions for the E, E/2, and E/3 energy components of the prototype Tokamak Fusion Test Reactor 120-keV deuterium neutral beam source were measured on the Neutral Beam System Test Facility at Lawrence Berkeley Laboratory using a 127-deg swept electrostatic energy analyzer provided by the Princeton Plasma Physics Laboratory. The results were compared with Doppler shift spectroscopy measurements, taking into account the different geometrical factors for both methods. The average neutral current fractions for the E, E/2, and E/3 atomic species components measured with the electrostatic analyzer and extrapolated to the target area were 0.35, 0.47, and 0.18, respectively, which agreed with the spectroscopic results to within 5%. For all species, a 1/e full-width energy broadening of ∆.E/E ≅ 4% was observed for an analyzer energy resolution of both ∼4 and 1%. This width is not in contradiction with the energy broadening expected due to Franck-Condon dissociation effects. The peak energies for the E, E/2, and E/3 components were within ∼4% of the rated values, but consistently on the low side of the standard deviation.