ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
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.
Werner Brandt, Michael D. D’Agostino, Anthony J. Favale
Nuclear Technology | Volume 11 | Number 1 | May 1971 | Pages 99-104
Technical Paper | Instrument | doi.org/10.13182/NT71-A30907
Articles are hosted by Taylor and Francis Online.
An alpha-particle gas densitometer is described with an instrument response that can be tailored to given specifications by shaping the energy distribution of the radioactive alpha source. Relations are derived to establish the connection between a specified densitometer response and the corresponding source distribution. Shaped sources can be constructed by mounting contoured baffles on alpha sources. The operation of the densitometer is demonstrated experimentally for a linear and a logarithmic instrument response to air density variations.
