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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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!
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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.”
M.A. Lomidze, A.E. Gorodetsky, A.P. Zakharov
Fusion Science and Technology | Volume 28 | Number 3 | October 1995 | Pages 1211-1216
Tritium Properties and Interaction with Material | Proceedings of the Fifth Topical Meeting on Tritium Technology In Fission, Fusion, and Isotopic Applications Belgirate, Italy May 28-June 3, 1995 | doi.org/10.13182/FST95-A30574
Articles are hosted by Taylor and Francis Online.
In the model two states for accumulated hydrogen (soluble and molecular) are suggested. Under ion irradiation three reactions (events) take place: recombination of soluble hydrogen on irradiated surface; accumulation of molecular hydrogen; molecular percolation. The first reaction describes recombination under and after irradiation. The second reaction describes molecular hydrogen accumulation as statistical packing of the “traps”. The third one describes molecular percolation as a capturing of one more incoming particle in already packed “trap”, that is accompanied by the reemission of H2, by the devastation of the “trap”, and by the increasing of the irradiated surface. Under steady state for molecular accumulation and surface formation, recombination flux approaches the value of incoming flux and no percolation acts take place. Molecular accumulation approaches the steady state prompter than surface formation. The cross sections for (helium/hydrogen) emission changing over hydrogen to helium beam and vice versa were calculated. Simulation of the model coincides with the experimental data of hydrogen retention, reemission, and post-implanted release.