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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
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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May 2025
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Latest News
El Salvador: Looking to nuclear
In 2022, El Salvador’s leadership decided to expand its modest, mostly hydro- and geothermal-based electricity system, which is supported by expensive imported natural gas and diesel generation. They chose to use advanced nuclear reactors, preferably fueled by thorium-based fuels, to power their civilian efforts. The choice of thorium was made to inform the world that the reactor program was for civilian purposes only, and so they chose a fuel that was plentiful, easy to source and work with, and not a proliferation risk.
Technical Session|Sponsored by NCSD|Cosponsored by NNPD
Wednesday, November 16, 2022|8:00–9:45AM MST|Copperwood
Session Chair:
Kristan Wessels
Alternate Chair:
David G. Erickson
Session Organizer:
Theresa E. Cutler
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Generating Models of the Flattop Critical Assembly for Benchmark Experiments with Python
8:00–8:20AM MST
A. Hauck (LANL), K. Stolte (LANL), T. Grove (LANL), N. Whitman (LANL), T. Cutler (LANL), R. Sanchez (LANL), J. Lamproe (LANL), D. Hayes (LANL)
Paper
Modeling Approach to Critical in the Upcoming CERBERUS Experiment
8:20–8:40AM MST
Zachariah Lemke (LANL), Kelsey Amundson (LANL), Theresa Cutler (LANL), Nicholas Whitman (LANL)
Hybrid Particle Swarm-Interpolation Algorithm for Improved Critical Experiment Design
8:40–9:00AM MST
Cole Kostelac (Missouri Univ. Science and Technology), Nicholas Thompson (LANL), Ayodeji Alajo (Missouri Univ. Science and Technology), Noah Kleedtke (LANL), Rene Sanchez (LANL)
Rossi-Alpha Analysis of Thermal/Epithermal eXperiments Optimized for Polyethylene Thermal Neutron Scattering
9:00–9:20AM MST
Caiser A. Bravo (LANL), Jesson D. Hutchinson (LANL), George E. McKenzie (LANL), Theresa E. Cutler (LANL), Travis J. Grove (LANL), Alex McSpaden (LANL), Rene G. Sanchez (LANL)
Prompt Neutron Decay Constant Measurements at the Inherently Safe Subcritical Assembly
9:20–9:40AM MST
Daniel Siefman (LLNL), W. Zywiec (LLNL), S. Varghese (LLNL), O. Pakari (Univ. Michigan), David Heinrichs (LLNL)
Presented by Ruby Araj (LLNL)
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