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.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Deep geologic repository progress—2025 Update
Editor's note: This article has was originally published in November 2023. It has been updated with new information as of June 2025.
Outside my office, there is a display case filled with rock samples from all over the world. It contains a disk of translucent, orange salt from the Waste Isolation Pilot Plant near Carlsbad, N.M.; a core of white-and-bronze gneiss from the site of the future deep geologic repository in Eurajoki, Finland; several angular chunks of fine-grained, gray claystone from the underground research laboratory at Bure, France; and a piece of coarse-grained granite from the underground research tunnel in Daejeon, South Korea.
Augusta Airoldi, Giovanna Cenacchi
Fusion Science and Technology | Volume 19 | Number 1 | January 1991 | Pages 78-85
Technical Paper | Plasma Engineering | doi.org/10.13182/FST91-A29317
Articles are hosted by Taylor and Francis Online.
The influence of a few parameters on the possibility of reaching ignition in the Ignitor device is analyzed using a 1½-dimensional equilibrium transport code. The models adopted for electron and ion thermal diffusivities scale with the net power input to the plasma components. No auxiliary heating is considered besides that due to alpha particles. In the operative scenario examined, the plasma current (Ip = 10 MA) and the toroidal field (BT = 11.1 T) are maintained for 4 s. The importance of density profile shaping is pointed out together with the influence of current density peaking. Sensitivity to specified assumptions is also analyzed and the limit values, still guaranteeing ignition, for different parameters are determined.