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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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
Fusion Science and Technology
Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
19th International Conference on Probabilistic Safety Assessment and Analysis (PSA 2025)
Technical Session|Sponsored by NISD
Tuesday, June 17, 2025|3:15–5:00PM CDT|Houston/Kansas City
Session Chair:
Robby Christian
Alternate Chair:
F. Gregory Hudson
Session Organizer:
David Grabaskas
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Recent Updates to the Dynamic Physical Security Risk Assessment Methodology for Light Water Reactors
3:15–3:35PM CDT
Robby Christian (Idaho National Laboratory), Steven Prescott (Idaho National Laboratory), Shawn W. St. Germain (Idaho National Laboratory), Vaibhav Yadav (Idaho National Laboratory), Christopher Chwasz (Idaho National Laboratory), Andrew E. Johnson (Rensselaer Polytechnic Institute)
Paper
The Value of Developing Quantitative Estimates of Attack Likelihood for Risk-Informed Security
3:35–3:55PM CDT
Tim Sande (Enercon Services, Inc.)
A Risk-Informed Framework for Managing Nuclear Facility Security Risks
3:55–4:15PM CDT
Greg Hudson (Metcalfe PLLC), Lon Dawson (Sandia National Laboratories), Rick Grantom (CR Grantom & Associates, LLC), Tim Sande (Enercon Services, Inc.), Ricky Summitt (Enercon Services, Inc.), Bob Youngblood (Idaho National Laboratory)
Evaluating Security Performance Indicators for Risk-informed Performance-based regulation in the Republic of Korea
4:15–4:35PM CDT
Hyunjoo Lee (Korea Institute of Nuclear Nonproliferation and Control), Subong Lee (Korea Insitute of Nuclear Nonproliferation and Control)
Performing Numerical Analysis of Cybersecurity Options Using Dynamic Risk Analysis Tool EMRALD
4:35–4:55PM CDT
Steven Prescott (Idaho National Laboratory), Emerald Ryan (Idaho National Laboratory), Courtney Otani (Idaho National Laboratory), Bri Rolston (Idaho National Laboratory), Justin Welch (Idaho National Laboratory)
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