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Division Spotlight
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
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2025)
February 3–6, 2025
Amelia Island, FL|Omni Amelia Island Resort
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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Latest News
Senate committee hears from energy secretary nominee Chris Wright
Wright
Chris Wright, president-elect Trump’s pick to lead the U.S. Department of Energy, spent hours today fielding questions from members of the U.S. Senate’s committee on Energy and Natural Resources.
During the hearing, Wright—who’s spent most of his career in fossil fuels—made comments in support of nuclear energy and efforts to expand domestic generation in the near future. Asked what actions he would take as energy secretary to improve the development and deployment of SMRs, Wright said: “It’s a big challenge, and I’m new to government, so I can’t list off the five levers I can pull. But (I’ve been in discussions) about how to make it easier to research, to invest, to build things. The DOE has land at some of its facilities that can be helpful in this regard.”
E. E. Lewis
Nuclear Science and Engineering | Volume 102 | Number 2 | June 1989 | Pages 140-152
Technical Paper | doi.org/10.13182/NSE89-A23639
Articles are hosted by Taylor and Francis Online.
Variational nodal methods for neutron transport are modified to reduce the angular coupling between spatial nodes without a commensurate loss of accuracy. In both one and two dimensions, the interface conditions of the variational principle allow near Pn accuracy to be obtained with only Pn−2 interface coupling. As a result, the dimension of the nodal response matrix is reduced by a factor of 2, and the number of arithmetic operations required for solution by a factor of 4. In the small spatial mesh limit, the resulting Pn, n−2 approximation retains accuracy near the Pn approximation used within the node rather than reverting to the Pn−2 interface approximation. Two-dimensional P3,1 transport calculations demonstrate that the variational nodal approximations are not subject to the flux depression suffered by other interface current nodal transport methods in problems dominated by streaming diagonal to the coordinate directions.