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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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Latest News
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.
Yoichi Watanabe, Jacob Appelbaum, Isaac Maya
Nuclear Science and Engineering | Volume 110 | Number 2 | February 1992 | Pages 109-127
Technical Papers | doi.org/10.13182/NSE92-A23881
Articles are hosted by Taylor and Francis Online.
The combination of a gaseous core fission reactor with a magnetohydrodynamic (MHD) generator can lead to more efficient conversion of fission energy to electricity than can conventional conversion systems. A system concept currently being investigated utilizes uranium tetrafluoride (UF4) as fuel and potassium or potassium fluoride (KF) as the working fluid. The electrical conductivity of the gas greatly influences the performance of the MHD generator. It is possible to enhance the electrical conductivity by taking advantage of fission fragment ions born in the fissile gas-working gas mixture. To study and quantify this effect, a chemical reaction model as well as a physical model are developed. The governing rate equations and an electron energy balance equation are numerically solved for steady-state and spatially homogeneous cases. The electrical conductivity of a UF4-K/KF gaseous mixture is shown to be a function of neutron flux at representative gas conditions (2500 K and 1 atm). The enhancement is achieved because of the rise in electron temperature due to fission fragment heating.
