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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
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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May 2025
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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
Technical Session|Sponsored by OPD
Wednesday, June 15, 2022|8:00–9:45AM PDT|San Simeon A
Session Chair:
Tim Crook (MCR Performance Solutions)
Session Organizer:
W. Neal Mann (ANL)
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Development of Principal Design Criteria of the Fast Modular Reactor
Chun Fu (General Atomics), Hangbok Choi (General Atomics), John Bolin (General Atomics)
Paper
A Simple Program to Estimate the Fast Modular Reactor Steady-State Closed Brayton Cycle Operating Parameters
Chun Fu (General Atomics), Matthew Virgen (General Atomics), Hangbok Choi (General Atomics), Robert W. Schleicher (General Atomics), John Bolin (General Atomics)
Thermal-Fluidic Safety Related Phenomena Identification for Horizontally Oriented Micro-HTGRs
T-Ying Lin (Kansas State), Hitesh Bindra (Kansas State), Piyush Sabharwall (INL), Richard Schultz (Idaho State), Masahiro Kawaji (City College of New York), Donald E. McEligot (Kansas State)
MELCOR Model Development of the General Atomics Fast Modular Reactor
Cole Dunbar (Univ. Wisconsin, Madison), Jun Wang (Univ. Wisconsin, Madison), WooHyun Jung (Univ. Wisconsin, Madison), Michael Corradini (Univ. Wisconsin, Madison)
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