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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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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.”
Kohtaro Ueki, Masayoshi Kawai
Nuclear Technology | Volume 132 | Number 2 | November 2000 | Pages 281-289
Technical Paper | Radiation Protection | doi.org/10.13182/NT00-A3144
Articles are hosted by Taylor and Francis Online.
The 14-MeV neutron streaming experiment with three straight ducts is analyzed with the cell flagging technique of the MCNP code. The contributions of neutrons passing through the flagging cell located at the duct inlet and entering the detectors located in the duct are identified quantitatively. Furthermore, the streaming paths of neutrons entering in the duct inlet are cleared by the analysis.As an application of the cell flagging technique, a neutron streaming system with two-bend cylindrical duct in a thick concrete shield is prepared, and the flagging cells are located around the duct. The contributions of neutrons passing the flagging cells to the detector located at the duct outlet are cleared, and effective compensation shields to reduce the neutron dose-equivalent rate at the duct outlet are obtained by replacing some of the flagging cells with the NS-4-FR shield. Moreover, it is expected that the equilibrating contribution from each flagging cell to the dose-equivalent rate at the duct outlet is the essential function to make an effective compensation shielding system with neutron streaming.