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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.”
Thomas V. Prevenslik
Fusion Science and Technology | Volume 36 | Number 3 | November 1999 | Pages 309-314
Technical Paper | doi.org/10.13182/FST99-A111
Articles are hosted by Taylor and Francis Online.
Sonoluminescence (SL) observed in the collapse of bubbles in liquid H2O may be explained by the Planck theory of SL, which finds basis in quantum mechanics and relies on the bubble walls to be blackbody surfaces as originally envisioned by Planck. By this theory, the source of SL is the electromagnetic (EM) radiation field of the bubble wall described by the absorption (and emission) spectra of liquid H2O from ultraviolet (UV) at ~254 nm to soft X rays. During bubble collapse, the resonant frequency of the bubble cavity always increases. If the resonant frequency coincides with the EM radiation field, cavity quantum electrodynamics (QED) induces EM radiation at that frequency to be emitted from the bubble wall. Subsequently, the emitted EM radiation is absorbed. But cavity QED inhibits the spontaneous emission of any EM radiation absorbed at a frequency lower than the current bubble resonant frequency. Instead, the absorbed EM radiation may accumulate to be released as SL photons or it may be converted to free electrons either directly by the photoelectric effect or indirectly by the microwaves generated as the bubble collapses. By any combination of these processes, the collective EM radiation in the bubble wall is effectively focused on the gases within the bubble in the manner of a variable frequency UV to soft X-ray laser. A limited number of deuterium-deuterium (D-D) fusion events is suggested for ambient temperatures near the freezing point. Planck energies in excess of 10 keV/D2O vapor molecule are found as the D's in the low-density plasma are forced together under bubble wall collision pressures of ~200 atm. For a 20-kHz acoustic drive frequency, the thermal heating is of the order of a few microwatts, but neutrons should be detectable.