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
July 2025
Latest News
DOE on track to deliver high-burnup SNF to Idaho by 2027
The Department of Energy said it anticipated delivering a research cask of high-burnup spent nuclear fuel from Dominion Energy’s North Anna nuclear power plant in Virginia to Idaho National Laboratory by fall 2027. The planned shipment is part of the High Burnup Dry Storage Research Project being conducted by the DOE with the Electric Power Research Institute.
As preparations continue, the DOE said it is working closely with federal agencies as well as tribal and state governments along potential transportation routes to ensure safety, transparency, and readiness every step of the way.
Watch the DOE’s latest video outlining the project here.
J. A. Lonergan, D. F. Herring
Nuclear Technology | Volume 5 | Number 2 | August 1968 | Pages 79-84
Technical Paper and Note | doi.org/10.13182/NT68-A27955
Articles are hosted by Taylor and Francis Online.
A positron beam is produced and accelerated by an electron linear accelerator. The positrons annihilate in-flight when passed through a beryllium foil to produce nearly monoenergetic gamma rays with energies comparable with the positron energy and an energy spread essentially equal to the energy spread of the positron beam, i.e., 2%. Such a 10-MeV gamma-ray beam was collimated and directed at a slab of aluminum that had a thickness corresponding to one mean-free-path for 10-MeV gamma rays. The energy spectra at 0, 15, and 30° to the incident beam were measured with a NaI crystal. The results were integrated and compared with Monte Carlo calculations. The experiments and calculations agreed within the experimental uncertainty.