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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.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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.”
T. Sugiyama, Y. Asakura, T. Uda, K. Kotoh
Fusion Science and Technology | Volume 48 | Number 1 | July-August 2005 | Pages 163-166
Technical Paper | Tritium Science and Technology - Tritium Science and Technology - Detritiation, Purification, and Isotope Separation | doi.org/10.13182/FST05-A904
Articles are hosted by Taylor and Francis Online.
At the National Institute for Fusion Science experimental studies on hydrogen isotope separation by a cryogenic Pressure Swing Adsorption (PSA) process have been carried out in order to apply it to the system of vacuum pumping-gas treatment for the D-D burning experiments of the Large Helical Device. Breakthrough behavior of D2 in a H2-D2 mixture flowing through a synthetic zeolite 5A-type packed-bed column at 77.4 K is examined by using a cryogenic PSA apparatus. The test column used is 40 mm inner diameter. It is filled with spherical adsorbent particles of 2 mm at an amount of 700 g on a dry basis. The hydrogen mixture including D2 at a concentration of 1 % is used in this experiment. The breakthrough curves obtained by the experiments are accurately simulated by theoretical curves calculated for the system exhibiting the Henry type adsorption. Overall effective mass transfer coefficients are obtained from the comparison of experimental curves with analytical ones. The coefficients increase monotonously with superficial velocity. The sequential operations of PSA, such as adsorption, desorption and pressurization is carried out for several times. It is confirmed that breakthrough curves are reproducible after several repetitions of operation.