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
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
April 2025
Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Yasuhiro Suzuki
Fusion Science and Technology | Volume 59 | Number 3 | April 2011 | Page 626
Appendix A | Fourth ITER International Summer School (IISS2010) / Extended Abstracts | doi.org/10.13182/FST11-A11707
Articles are hosted by Taylor and Francis Online.
The stellarator and heliotron are alternate candidates for magnetically confined fusion devices. A major difference is the source of the rotational transform [iota] = 1/q. In tokamaks, the rotational transform [iota] is produced by coupling the symmetric toroidal field and the poloidal field produced by the plasma current along the toroidal direction. Strictly speaking, the tokamak configuration can be assumed to be a two-dimensional (2-D) system. Note that the rotational transform does not exist for the vacuum. For stellarator and heliotron configurations, the rotational transform is produced by the shaping of flux surfaces. To shape flux surfaces, the vacuum magnetic field is produced by external coils with helical-winding laws. This means the vacuum magnetic field produced for the vacuum is intrinsically three dimensional (3-D). Thus, the plasma current is not required to make flux surfaces. This characteristic is an advantage. Since the plasma current is not necessary, disruptions do not appear and steady-state operation is possible. However, because of the 3-D plasma responses, experimental and theoretical studies become more complex.
