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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.
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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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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.”
Jae Seung Song, Nam Zin Cho
Nuclear Technology | Volume 119 | Number 2 | August 1997 | Pages 105-111
Technical Paper | Fission Reactor | doi.org/10.13182/NT97-A35379
Articles are hosted by Taylor and Francis Online.
An axial xenon oscillation model is developed for pressurized water reactor analysis. The model employs an equation system for axial difference parameters that is derived from xenon and iodine balance equations coupled with two-group, one-dimensional neutron diffusion equations. To treat nonlinear xenon-flux-coupled terms, the spatial distributions of xenon, iodine, and flux are expanded by the Fourier sine series. The equation with respect to the axial difference parameters can be analytically solved with the initial condition related to axial power difference, which can be measured in the reactor. The axial power difference variation during xenon oscillation is directly obtained, and it provides a prediction of xenon oscillation behavior. The accuracy of the model is verified by benchmark calculations with a three-dimensional reference core calculation code and measured data from a core startup test at Yonggwang Unit 3.