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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
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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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Jun 2025
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Nuclear Science and Engineering
August 2025
Nuclear Technology
July 2025
Fusion Science and Technology
Latest News
Nuclear fuel cycle reimagined: Powering the next frontiers from nuclear waste
In the fall of 2023, a small Zeno Power team accomplished a major feat: they demonstrated the first strontium-90 heat source in decades—and the first-ever by a commercial company.
Zeno Power worked with Pacific Northwest National Laboratory to fabricate and validate this Z1 heat source design at the lab’s Radiochemical Processing Laboratory. The Z1 demonstration heralded renewed interest in developing radioisotope power system (RPS) technology. In early 2025, the heat source was disassembled, and the Sr-90 was returned to the U.S. Department of Energy for continued use.
Technical Session|Sponsored by RPSD
Tuesday, June 15, 2021|12:00–1:45PM EDT
Session Chair:
Dominic Napolitano
Alternate Chair:
Amir A. Bahadori (Kansas State Univ.)
Session Organizer:
Michael Lorne Fensin
Staff Producer:
Julie Bry (ANS)
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Molten Salt Reactor Fission Source Characterization and Initial Shielding Analysis
Kyle Carberry (Georgia Institute of Technology), Bojan Petrovic (Georgia Institute of Technology)
Paper
Overview of the 2020 SCALE 6.2.4 Validation Report for Radiation Shielding Applications
Mathieu N. Dupont (ORNL), Douglas E. Peplow (ORNL), Cihangir Celik (ORNL), Georgeta Radulescu (ORNL), William A. Wieselquist (ORNL)
3D Model Visual Verification and Mesh-Based Data Analysis in Fulcrum
R. A. Lefebvre (ORNL), S. R. Johnson (ORNL), W. J. Marshall (ORNL), C. Celik (ORNL)
Modeling Additional Dose from Adding Uranium-232 to the Uranium Fuel Cycle
Joshua Rhodes (Univ. of Tennessee Knoxville), Brandon Grogan (ORNL), Alan Krichinsky (ORNL), Brad Patton (ORNL), G. Ivan Maldonado (Univ. of Tennessee Knoxville)
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