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
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
Jul 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
August 2025
Nuclear Technology
Fusion Science and Technology
Latest News
ANS joins others in seeking to discuss SNF/HLW impasse
The American Nuclear Society joined seven other organizations to send a letter to Energy Secretary Christopher Wright on July 8, asking to meet with him to discuss “the restoration of a highly functioning program to meet DOE’s legal responsibility to manage and dispose of the nation’s commercial and legacy defense spent nuclear fuel (SNF) and high-level radioactive waste (HLW).”
Subhash Saini, Feroz Ahmed, L. S. Kothari
Nuclear Science and Engineering | Volume 52 | Number 3 | November 1973 | Pages 402-405
Technical Note | doi.org/10.13182/NSE73-A19487
Articles are hosted by Taylor and Francis Online.
A variational method particularly suitable for the pulsed-neutron problem was suggested by Ahmed et al.; in this method, one needed the exact solution of the eigenvalue equation for two values of the buckling. In the modification we suggest, no solution of the eigenvalue equation is required; however, compared to the earlier method our results are a little less accurate. A similar variational method has also been developed for the case of neutron diffusion. As examples, we have studied the decay of a neutron pulse and neutron diffusion in beryllium and beryllium oxide blocks.