ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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!
Latest Magazine Issues
May 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
June 2025
Fusion Science and Technology
Latest News
High-temperature plumbing and advanced reactors
The use of nuclear fission power and its role in impacting climate change is hotly debated. Fission advocates argue that short-term solutions would involve the rapid deployment of Gen III+ nuclear reactors, like Vogtle-3 and -4, while long-term climate change impact would rely on the creation and implementation of Gen IV reactors, “inherently safe” reactors that use passive laws of physics and chemistry rather than active controls such as valves and pumps to operate safely. While Gen IV reactors vary in many ways, one thing unites nearly all of them: the use of exotic, high-temperature coolants. These fluids, like molten salts and liquid metals, can enable reactor engineers to design much safer nuclear reactors—ultimately because the boiling point of each fluid is extremely high. Fluids that remain liquid over large temperature ranges can provide good heat transfer through many demanding conditions, all with minimal pressurization. Although the most apparent use for these fluids is advanced fission power, they have the potential to be applied to other power generation sources such as fusion, thermal storage, solar, or high-temperature process heat.1–3
2020 ANS Virtual Winter Meeting Plenary Session Speaker
Integrated Security Solutions
Associate Labs Director
Sandia National Laboratories
As Associate Labs Director for Integrated Security Solutions, Andrew McIlroy provides leadership and management direction for Sandia’s California Laboratory and the Energy and Earth Systems Center, which includes staff in New Mexico, Texas, and Alaska. In addition, he has primary responsibility for Sandia’s Energy and Homeland Security mission portfolio, as well as for California weapon systems and component engineering. Previously, Andy was Director of the Energy and Homeland Security Program Management Center and Deputy Associate Labs Director for Integrated Security Solutions. In this role, Andy led business operations for Integrated Security Solutions and managed Sandia’s Energy and Homeland Security Program portfolio. Andy’s Sandia career began in 1991 as a Combustion Research Facility postdoctoral researcher. He joined The Aerospace Corporation in 1993 and returned to Sandia in 1997 as a technical staff member in the Combustion Chemistry and Diagnostics Department. Andy served as Manager for both the Combustion Chemistry and Diagnostics and the Reacting Flows Research departments, Senior Manager for Chemical Sciences, and Acting Director of the Materials Science Center. As Senior Manager for Livermore Valley Open Campus (LVOC) Development, Andy developed the physical and operational infrastructure for LVOC, a joint initiative of Sandia and Lawrence Livermore National Laboratory to create an accessible, common campus to foster domestic and international partnerships with industry and academia. Andy also created programs to take advantage of the LVOC. Andy became Senior Manager for Science-Enabled Engineering and led Verification and Validation for Sandia’s Advanced Simulation and Computing Program. As Deputy Chief Technology Officer for Sandia and Director of Research Strategy and Partnership, Andy led Sandia’s Laboratory Directed Research and Development Program, academic and industrial partnerships, and tech transfer programs. Andy has a bachelor’s degree in chemistry with honors and distinction from Harvey Mudd College and a PhD in chemical physics from the University of Colorado. He cochaired the Department of Energy’s (DOE’s) Basic Research Needs Workshop for Clean and Efficient Combustion of 21st-Century Transportation Fuels, coordinated the DOE Workshop on Predictive Simulation for Internal Combustion Engines, and has authored 40 peer-reviewed journal articles.
Last modified November 4, 2020, 11:33am EST