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.
William L. Whittemore
Nuclear Technology | Volume 5 | Number 2 | August 1968 | Pages 85-90
Technical Paper and Note | doi.org/10.13182/NT68-A27956
Articles are hosted by Taylor and Francis Online.
A large segment of neutron scattering measurements is performed with the cold-filter energy-gain scattering technique. A technique is proposed for deriving the same scattering information using time-of-flight energy-loss scattering technique but with significantly increased counting efficiency. This improvement is achieved using a standard neutron beam chopper and results from the use of the entire thermal spectrum from the reactor instead of 2% of the spectrum as in usual cold beam applications. A careful optimization of the proposed technique should increase the efficiency of data acquisition by at least a factor of 10.