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.
Explore membership for yourself or for your organization.
Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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!
Latest Magazine Issues
Oct 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
November 2025
Nuclear Technology
October 2025
Fusion Science and Technology
Latest News
Oak Ridge museum to host Nuclear Science Week events
The Smithsonian-affiliated American Museum of Science & Energy in Oak Ridge, Tenn., is partnering with the East Tennessee Economic Council (ETEC) to celebrate Nuclear Science Week from Monday, October 20, to Friday, October 24.
F. Zylbersztejn, H. N. Tran, I. Pázsit, P. Filliatre, C. Jammes
Nuclear Science and Engineering | Volume 177 | Number 2 | June 2014 | Pages 203-218
Technical Paper | doi.org/10.13182/NSE13-41
Articles are hosted by Taylor and Francis Online.
The subject of this paper is the calculation of the neutron noise induced by small-amplitude stationary radial variations of the core size (core expansion/compaction, also called core flowering) of a large sodium-cooled fast reactor. The calculations were performed on a realistic model of the European Sodium Fast Reactor (ESFR) core with a thermal output of 3600 MW(thermal), using a multigroup neutron noise simulator. The multigroup cross sections and their fluctuations that represent the core geometry changes for the neutron noise calculations were generated by the code ERANOS. The space and energy dependences of the noise source represented by the core expansion/compaction and the induced neutron noise are calculated and discussed.