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Division Spotlight
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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!
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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.
Vladimir E. Semenov, Artem N. Smirnov, Andrey Turlapov
Fusion Science and Technology | Volume 35 | Number 1 | January 1999 | Pages 398-402
Poster Presentations | doi.org/10.13182/FST99-A11963893
Articles are hosted by Taylor and Francis Online.
A new model is developed for an electron-cyclotron-resonance-heated plasma confinement in an open mirror magnetic trap. The model is based on the simultaneous study of noncollisional kinetics of electrons and gas dynamics of ions. At the trap center, the electron distribution function is approximated by bi-Maxwell distribution (with effective temperatures T⊥ and T‖ – mean energies of the transverse and longitudinal to the magnetic field motion). Within the model framework the ion confinement time as well as the axial distribution of the ambipolar potential and plasma density has been investigated both numerically and analytically. The confinement time and potential profile are very much dependent on the electron distribution anisotropy and, in strongly anisotropic case, on the ion temperature. The ambipolar potential changes qualitatively while the ratio T⊥/T‖ exceeds a certain threshold value. Below the threshold, the potential falls off monotonously along the trap axis outwards from the trap center. After the threshold is exceeded, there appears a potential peak between the center and the plug. This potential peak retards ion escape through the plug and provides quite different confinement of ions with different charges in an ECR ion source.