ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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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
Jan 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.
2023 ANS Student Conference Speaker
Julie Ezold has 30 years’ experience in the nuclear sciences and is currently the Californium-252 Program Manager; a multi-million-dollar enterprise that includes the production of Berkelium-249, Einsteinium-253, and other trans-curium products. These trans-curium products have been used in the discovery of a new element, Element 117, aptly named Tennessine. Previously she was the Radioisotope Production and Operations Section Head; responsible for managing the production and optimization of all radioisotopes that are in a continuing and sustained state of demand and production beyond the research and development phases. Ms. Ezold has actively supported nuclear science educational activities through the Nuclear Science and Engineering Directorate’s Educational Outreach Committee, K-2 Science Club, Mentor Program, and others. Ms. Ezold holds a BS, Nuclear Engineering from Rensselaer Polytechnic Institute and a Masters, Nuclear Engineering, from North Carolina State University. Her master’s research, “Determination of Iodine-129 Production in Light Water Reactors”, was conducted at the High Flux Isotope Reactor at ORNL. After completing her master’s, she joined the staff at ORNL and has held positions in engineering, waste management, criticality safety, and isotope production. Ms. Ezold has been an active ANS member since 1988; where she is currently serving on the Board of Directors and is Chairperson of the Scholarship Policy and Coordination Committee.
Last modified March 24, 2023, 9:27am EDT
