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
Aug 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
No impact from Savannah River radioactive wasps
The news is abuzz with recent news stories about four radioactive wasp nests found at the Department of Energy’s Savannah River Site in South Carolina. The site has been undergoing cleanup operations since the 1990s related to the production of plutonium and tritium for defense purposes during the Cold War. Cleanup activities are expected to continue into the 2060s.
T. Takeda, E. Wachi
Nuclear Science and Engineering | Volume 81 | Number 4 | August 1982 | Pages 551-557
Technical Note | doi.org/10.13182/NSE82-A21445
Articles are hosted by Taylor and Francis Online.
An approximate method for calculating the interference of neutron streaming between different regions (drawers) in fast critical assemblies is described by applying the well-known Benoist formula to super cell problems. The interference effect on the diffusion coefficient was numerically evaluated and the results are compared with those obtained by Yoshida’s method. Sodium void worths in control rod positions (control rod follower channel) relative to the sodium-filled channel are calculated on the basis of diffusion theory with the interference effect and compared with the results obtained from transport calculations. The comparison reveals that the inclusion of the interference effect improves the calculational accuracy remarkably.