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
2027 ANS Winter Conference and Expo
October 31–November 4, 2027
Washington, DC|The Westin Washington, DC Downtown
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
Nov 2024
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
December 2024
Nuclear Technology
Fusion Science and Technology
November 2024
Latest News
Disney World should have gone nuclear
There is extra significance to the American Nuclear Society holding its annual meeting in Orlando, Florida, this past week. That’s because in 1967, the state of Florida passed a law allowing Disney World to build a nuclear power plant.
Osamu Mitarai, Hiroki Hasuyama, Yoshihisa Wakuta
Fusion Science and Technology | Volume 21 | Number 4 | July 1992 | Pages 2265-2283
Technical Paper | Special Issue on D-He Fusion / D-3He/Fusion Reactor | doi.org/10.13182/FST92-A29720
Articles are hosted by Taylor and Francis Online.
Ignition characteristics in deuterium-tritium (D-T) and D-3He tokamak reactors with spin-polarized fuels are presented by using the ignition access condition based on the generalized saddle point in the representation of . Enhancement of the D-T fusion cross section due to parallel spin polarization with respect to the magnetic field can reduce the confinement enhancement factor required for reaching ignition by ∼20% if fusion particle loss is not induced by the anisotropic fusion particle distribution. Spin polarization is thus effective when a D-T reactor is marginal for ignition. In D-3He fusion, it is more advantageous to use spin-polarized fuel in the heating phase than in the case of D-T fusion. The ignition toroidal beta value can be reduced by spin polarization from 12 ± 0.8 to 5.3 ± 0.5% in D-3He = 2:1 plasma and from 17 ± 0.5 to 6.5 ± 0.2% in D-3He = 1:1 plasma. The auxiliary heating power to reach ignition, which is rather large for D-3He fusion, can be reduced by a factor of 2 to 3 compared with the unpolarized case. For example, in the D-3He Tokamak Reactor, 350 MW of auxiliary heating power for D:3He = 2:1 and Ti(0)/Te(0) = 1 without spin polarization can be reduced to 190 MW with complete polarization of the deuterium and 3He ions. The deuterium-deuterium fusion suppression effect, if it exists, does not alter the ignition condition much. Various problems related to the spin polarization scheme are also discussed.
