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Division Spotlight
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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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August 2024
Nuclear Technology
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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.”
H. Vincke, D. Forkel-Wirth, H. G. Menzel, S. Roesler, C. Theis, M. Widorski, K. Hatanaka, H. Yashima, T. Nakamura, S. Taniguchi, N. Nakao, A. Tamii
Nuclear Technology | Volume 168 | Number 1 | October 2009 | Pages 5-10
Detectors | Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 1) / Radiation Protection | doi.org/10.13182/NT09-A9092
Articles are hosted by Taylor and Francis Online.
Radiation monitoring during operation of CERN's high-energy accelerators in general, and the Large Hadron Collider and its experiments in particular, poses a major challenge due to the stray radiation fields, which are characterized by a complex particle composition and a wide range of energies. In order to monitor ambient doses around workplaces and inside the machine tunnel, high-pressure ionization chambers (so-called IG5) and air-filled ionization chambers under atmospheric pressure (PMI) will be used. Because of the complexity of the radiation field, standard gamma or neutron radiation sources are not applicable to accurately calibrate monitors used in such environments. Hence, the use of Monte Carlo simulation programs like FLUKA is indispensable to obtain an appropriate monitor calibration. Following this idea the response of the aforementioned monitors to mixed particle fields ranging from thermal energies to several giga-electron-volts was simulated. Because neutrons are the main contributor to total dose at many locations around the accelerators, dedicated neutron experiments were carried out at the Research Center for Nuclear Physics, Osaka University, utilizing quasi-monoenergetic beams of 250 and 392 MeV to benchmark the simulated detector responses. Good agreement was found at 392 MeV, whereas at 250 MeV the calculations predicted considerably higher readings of the detector than the ones observed experimentally.