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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
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Hyoung Tae Kim, Hee Cheon No
Nuclear Technology | Volume 119 | Number 1 | July 1997 | Pages 98-104
Technical Note | Heat Transfer and Fluid Flow | doi.org/10.13182/NT77-A35397
Articles are hosted by Taylor and Francis Online.
The improvement of RELAP5/MOD3.1 code predictive capability for steam condensation on an inclined surface is investigated. In modeling the secondary condensers with RELAP5, two problems were encountered with respect to condensation in vertically stacked tube walls: the capability for turbulent film condensation and the effect of the wall node size on the prediction of condensation heat transfer coefficients (HTCs). The code original model based on the Nus-selt model for laminar film condensation is extended to the turbulent film condensation by introducing two previously developed models into the code. The code is further improved to properly take into account the condensation length over many nodings. To eliminate the dependence on the node size in predicting the condensation HTC of the code, film Reynolds numbers at each node are calculated recursively to track the growing condensate film thickness along the condensation length. The modified version is tested under idealized boundary conditions and with the simulation of secondary condensers and is compared with an analytical solution and the original code. It turns out that the simulation results by this modified version are independent of the node size and are in better agreement with the analytical solution than those by the original one.