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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.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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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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.
Ezio Bittoni, Marcel Haegi
Fusion Science and Technology | Volume 22 | Number 4 | December 1992 | Pages 461-469
Alpha-Particle Special | doi.org/10.13182/FST92-A30081
Articles are hosted by Taylor and Francis Online.
The diffusion coefficient for the fast alpha particles produced in a thermonuclear plasma is derived numerically for the case of a magnetic field perturbed by ripple and magnetohydrodynamic (MHD) helical modes. It is found that this diffusion coefficient varies monotonously with the amplitude of the magnetic perturbations and that the transition from the classic to the stochastic regime occurs smoothly. The ripple perturbations as well as the MHD perturbations essentially affect the trapped-particle orbits. It is shown that above an MHD perturbation amplitude of some 10−3 of the total magnetic field, severe fast alpha-particle losses must be expected. Parametric studies have shown the dependence of the MHD helical diffusion coefficient on the amplitude of the perturbation, the helical mode number, and the energy of the alpha particles. An analytic expression for the MHD diffusion coefficient, based on these scalings, is proposed.
