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.
Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Arthur W. Dalton
Fusion Science and Technology | Volume 12 | Number 3 | November 1987 | Pages 409-415
Technical Paper | Tritium System | doi.org/10.13182/FST87-A25072
Articles are hosted by Taylor and Francis Online.
A cylinder of natural lithium carbonate, supported on a slab of graphite, was irradiated from above by a low-intensity source of 14-MeV neutrons and the tritium produced within it subsequently determined from measurements of beta activity. Results obtained for small lithium carbonate detectors highly enriched in 6Li (96%) or 7Li (99.9%) at six positions along the cylinder axis were compared with predictions based on three-dimensional Monte Carlo calculations and multi-group cross-section data. The experimental accuracy was sufficient to detect deviations from theory > 7% with a 95% level of confidence. On this basis, good agreement with theoretical predictions was obtained for the 7Li results. For the 6Li data, however, significant differences were observed in the lower half of the assembly. A detailed analysis indicated that these deviations could not be explained in terms of conceivable environmental perturbations of the neutron flux and may arise as a consequence of inadequate representation of anisotropic neutron scattering.