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Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
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