ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver 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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Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
L. E. Hansen, N. A. Wogman, R. W. Perkins, E. D. Clayton
Nuclear Technology | Volume 15 | Number 3 | September 1972 | Pages 422-430
Technical Paper | Radioisotope | doi.org/10.13182/NT72-A16039
Articles are hosted by Taylor and Francis Online.
Calculations were performed which indicate that thermal flux increases of a factor of 20 should be possible through the optimal use of fissile material regions surrounding 252Cf sources. For demonstration purposes, a subcritical system was assembled and used for trace element determination in marine life, terrestrial biota, and mineral specimens. This multiplying assembly consisted of PuO2 admixed with polystyrene and reflected with Plexiglas. Source neutrons were provided by a 200µg 252Cf source. A neutron flux amplification of about fivefold was achieved at the 252Cf source, while an amplification of some 40-fold was obtained 16 cm from the source where the majority of source exposures would be made.
