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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.”
Jinhui Liu, Fangyu Gu
Nuclear Technology | Volume 140 | Number 2 | November 2002 | Pages 164-168
Technical Paper | Nuclear Plant Instrumentation, Control, and Human-Machine Interface Technologies | doi.org/10.13182/NT02-A3330
Articles are hosted by Taylor and Francis Online.
This paper presents a new mass and energy estimating method for loose parts (LPs) combining the Karhunen-Loève (K-L) transform and neural network theories in the frequency domain. The detection of LPs was performed using simulated acoustic sensors mounted on the wall of a simulator of a reactor vessel. The impact events were simulated by simple pendulums. The data sampled in the time domain was changed to power spectral densities in the frequency domain using the fast Fourier transform. Then, the K-L transform was used to compress the original information. The final feature space's dimensions can be much less than the original ones. And, the original information remains as much as possible. The experiment showed that the impact characteristics of the LPs could be exactly depicted in the compressed feature space. The calculated mass values were approximately equal to the actual ones.