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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!
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Nuclear Science and Engineering
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Fusion Science and Technology
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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
Technical Session|Sponsored by NCSD
Wednesday, November 16, 2022|10:00–11:45AM MST|Copperwood
Session Chair:
James C. Bunsen
Alternate Chair:
Leah Berman
Session Organizer:
Benjamin Martin
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Genetic Algorithm Optimization of Experiment Design for Targeted Uncertainty Reduction on the 35Cl (n,p) Cross Section
10:00–10:20AM MST
Alexander Amedeo DePillis (Univ. Tennessee, Knoxville), Vladimir Sobes (Univ. Tennessee, Knoxville), Sandra Bogetic (Univ. Tennessee, Knoxville), J. Wesley Hines (Univ. Tennessee, Knoxville)
Paper
Maximizing the Loading of the H-Canyon Used Nuclear Fuel Dissolvers
10:20–10:40AM MST
Hannah Hyslop (Univ. Tennessee, Knoxville), Nathan Devine (Savannah River Nuclear Solutions), Joshua Butler (Y-12 Nat'l Security Complex), Tracy Stover (GE-Hitachi Nuclear Energy)
Fraction Critical and k-effective
10:40–11:00AM MST
Robert D. Busch (Univ. New Mexico)
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