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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.”
K. Oishi, Y. Ikeda, C. Konno, H. Maekawa, T. Nakamura
Fusion Science and Technology | Volume 10 | Number 3 | November 1986 | Pages 579-584
Fusion Nucleonics Experiments | Proceedings of the Seveth Topical Meeting on the Technology of Fusion Energy (Reno, Nevada, June 15–19, 1986) | doi.org/10.13182/FST86-A24806
Articles are hosted by Taylor and Francis Online.
Irradiation of concrete aggregates by 14 MeV neutrons was performed to investigate the activation characteristics of concrete, and to verify the calculation code system THIDA using the FNS facility. From the result it was proven that 42K, 24Na, 43K, 48Sc, 47Ca, 46Sc, and 54Mn, in half life order, make an important contribution to the total activity. In addition, a comparison between experiment and calculation was made. For 24Na and 54Mn, whose cross sections were well estimated, good agreement between experiment and calculation was obtained, which proved the validity of the calculational code. For reaction rates caused by calcium and titanium isotopes, however, calculational results that differed from experimental ones between −20 % to +40 % were obtained. This inconsistency was caused by the uncertainty of the cross section around 14 MeV, because the incident neutron energy was almost 14 MeV. Cross section measurements around 14 MeV of these reactions were performed systematically. Since all samples, except 48Ca, were separated isotopes and were irradiated in the same irradiation field, highly precise data with small relative error could be obtained. Consequently, calculations were performed again using measured cross section values, and then agreement between experiment and calculation was improved with ± 10 %.