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
Robotics & Remote Systems
The Mission of the Robotics and Remote Systems Division is to promote the development and application of immersive simulation, robotics, and remote systems for hazardous environments for the purpose of reducing hazardous exposure to individuals, reducing environmental hazards and reducing the cost of performing work.
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.
John C. Wesley, the U. S. ITER Home Teama
Fusion Science and Technology | Volume 21 | Number 3 | May 1992 | Pages 1380-1388
International Thermonuclear Experimental Reactor | doi.org/10.13182/FST92-A29916
Articles are hosted by Taylor and Francis Online.
Design features and performance parameters for HARD — the high-aspect-ratio (A = 4) International Thermonuclear Engineering Reactor (ITER) design variant developed by the U. S. ITER Team — are presented. The HARD design makes it possible for ITER to achieve both the ignition/extended-burn and the steady-state/technology-testing performance goals set forth in the ITER Terms of Reference. These performance capabilities are obtained in a device that is otherwise similar in concept, size and cost to the low-aspect-ratio (A = 2.8) ITER design defined during the ITER Conceptual Design Activity (CDA). HARD is based on the same physics and engineering guidelines as the CDA design and achieves the same ignition performance (ignition margin evaluated against ITER-89P confinement scaling) with inductively-driven plasmas as ITER CDA, but with much greater margin for inductive sustainment of the pulse duration. With non-inductive current drive, HARD operates at lower plasma current and higher plasma density and bootstrap current fraction than ITER CDA, is less constrained by beta limit and divertor considerations, and has increased peaking of the neutron wall load at the test module location. These factors give HARD a much better potential than ITER CDA to achieve the steady-state operation and 1 MWa/m2 technology-testing fluence goals of the ITER objectives.