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
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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.”
R. Giannella, M. Roccella
Fusion Science and Technology | Volume 18 | Number 2 | September 1990 | Pages 201-222
Technical Paper | Plasma Engineering | doi.org/10.13182/FST90-A29294
Articles are hosted by Taylor and Francis Online.
An analysis (in terms of different figures of merit) of the performances of several recently proposed tokamaks (IGNITOR, Compact Ignition Tokamak, IGNITEX, JIT, Enhanced Tokamak, Next European Torus, Candor) has been performed. The analysis was carried out according to different scaling laws and in various operating scenarios (temperature and density profile control, low and high energy confinement modes). In the plasma model, profile consistency between current density and temperature was assumed, taking into account neoclassical conductivity and the related physical constraints. The profiles obtained simulate the experimental data fairly well for both lower and higher collisional plasmas. A code was developed for this purpose that produces the stationary state contours for a given tokamak at different additional power levels once the scaling law is fixed. For a given machine, automatic analyses of these diagrams can be carried out for different confinement scaling laws and operating conditions. For a given scaling law and operating scenario, the code scans the configuration space looking for the “machines” capable of reaching ignition according to some simple technological constraints. The results for the most conservative situation are also shown.