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 8–12, 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
December 2025
Nuclear Technology
November 2025
Fusion Science and Technology
Latest News
Energy Secretary to speak at the 2025 ANS Winter Conference & Expo
In less than two weeks, the American Nuclear Society’s second annual conference of the year, the 2025 ANS Winter Conference & Expo, will come to Washington, D.C.
Today, ANS is announcing that Energy Secretary Chris Wright will be joining the list of nuclear leaders slated to speak at the conference.
Click here to register for the meeting, which will take place November 9–12 in Washington, D.C., at the Washington Hilton. Be sure to do so before November 7 to take advantage of priority pricing.
P. T. Hansson, L. R. Foulke
Nuclear Science and Engineering | Volume 17 | Number 4 | December 1963 | Pages 528-533
Technical Paper | doi.org/10.13182/NSE63-A18443
Articles are hosted by Taylor and Francis Online.
Measurements of the spatial dependence of the zero power transfer function of the reactor NORA have been performed, using a local reactivity perturbation. Spatial effects were observed for frequencies higher than the break frequency β/l, and the wave nature of the flux space-time variation has been recognized. A theoretical interpretation based on two-group diffusion theory is given by solution of the equations by the finite difference method on an analogue computer. The qualitative agreement between theory and experiment is good.