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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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.”
Salman M. Alshehri (Missouri S&T/KACST), Ibrahim A. Said (Alexandria Univ/Rice Univ), Muthanna H. Al-Dahhan (Missouri S&T/KACST/Alexandria Univ/Rice Univ), Shoaib Usman (Missouri S&T)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 670-681
Multiphase Reactors Engineering and Applications Laboratory (mReal) at Missouri S&T has designed, developed, and tested a dual channel module. The facility represents a scaled down prismatic modular reactor to mimic pressurized conduction cooldown (PCC) accident scenario for the prismatic modular reactor with a reference to High-Temperature Test Facility at Oregon State University (OSU-HTTF). The current facility was constructed to investigate a plenum-to-plenum (P2P) natural circulation heat transfer through two channels for different coolants (working fluid) at high operating pressure of 413.7 kPa. The natural circulation heat transfer in terms of temperature fields and heat transfer coefficients across the core of current facility (i.e., channels) has been investigated at constant outer surface temperature of upper plenum and downcomer channel (278.15 K) under nonuniform heating center peaking step (approximating cosine shape) using an advanced fast response heat transfer technique. Results showed that a net inner surface temperature gain along the riser channel by 84, 95, 98 and 150K for carbon dioxide, nitrogen, argon, and helium respectively. Also, an average increasing of centerline temperature along the riser channel is observed by 110, 133, 151 and 204 K for carbon dioxide, nitrogen, argon and helium, respectively. Furthermore, the current results show a common heat transfer coefficients trend for all coolants along the riser channel; the local heat transfer coefficient decrease with axial location from the entrance (Z/L = 0.044) until a minimum value at Z/L = 0.279 and after this position, the local heat transfer coefficient starts to increase again till Z/L= 0.591 (laminarization effects). And finally, heat transfer coefficient decrease from Z/L= 0.591 till the exit into the upper plenum. However, it was observed that heat transfer coefficients for helium was higher than all other gases for the entire riser channel and remained positive for much higher heights. In the laminarization effects region (0.279