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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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!
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NEI chief executive highlights “unlimited potential” for nuclear in state of the industry address
Korsnick
In the Nuclear Energy Institute’s annual State of the Nuclear Energy Industry report, NEI president and CEO and Maria Korsnick expressed optimism about the nuclear industry and she issued a call to action.
Her address was part of NEI’s Nuclear Energy Policy forum. The forum, being held in Washington, D.C., on May 20 and May 21, brings together industry leaders, policy stakeholders, and clean energy experts to discuss nuclear advocacy. Korsnick’s remarks focused on the private capital flowing into the industry, progress on regulatory reform and new nuclear technology, and how the U.S. is trying to take the lead on the global nuclear stage.
“We are here at an unprecedented time in our industry history,” Korsnick said. “I’m proud to say that the nuclear industry has a future of unlimited potential.”
T. J. Williamson, R. W. Albrecht
Nuclear Science and Engineering | Volume 37 | Number 1 | July 1969 | Pages 41-58
Technical Paper | doi.org/10.13182/NSE69-A20897
Articles are hosted by Taylor and Francis Online.
A general model is developed for numerical calculations of neutron slowing down parameters and functions in homogeneous media of any composition. The model is based on a representation of slowing down as a discrete time, discrete state Markov process. It is shown that the weighting function normally used in calculating elements of a multigroup stepping array is not optimal for discrete calculations. An improved weighting function is developed and used to define a model for Markovian transition probabilities. The relation defining Markov n-step transition matrices is utilized to generate stepping matrices that are consistent, accurate, and stable regardless of energy range or time step width. This relation is also used to develop a calculational technique in which a stepping matrix follows the neutron pulse downward in energy, greatly extending the energy range and number of states or groups that may be used in a single calculation. The model is evaluated by comparing the solutions it produces to certain exact solutions of the slowing down equation. It is, in turn, used to evaluate some asymptotic and approximate analytical solutions of the slowing down equation and to explore some problems in slowing down theory.
