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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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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.
Technical Session|Sponsored by Advanced/Novel Materials
Monday, December 11, 2023|9:30–11:30AM CST|Galerie 5
Session Chair:
William F. Cureton (ORNL)
Alternate Chair:
Janelle P. Wharry (Purdue Univeristy)
Track Organizers:
Kevin Field (Univ. Michigan)
Grace Burke (INL)
Benjamin Sutton (Electric Power Research Institute (EPRI))
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Internal Restructuring of TRISO Fuel Layers During Irradiation
9:30–9:50AM CST
T.J. Gerczak (ORNL), G.W. Helmreich (ORNL), C. Griesbach (Univ. Wisconsin, Madison), D. Schappel (ORNL), J.D. Arregui-Mena (ORNL), R. Thevamaran (Univ. Wisconsin, Madison), J.D. Hunn (ORNL)
Paper
Modeling of TRISO Coating Layer Fracture due to Buffer Debonding
9:50–10:10AM CST
Wen Jiang (NCSU), William F. Skerjanc (INL)
Micro-Mechanical Response of SiC-OPyC Layers in TRISO Fuel Particles
10:10–10:30AM CST
Katherine Montoya (ORNL), Erik Herbert (ORNL), Danny Schappel (ORNL), Tyler Gerczak (ORNL), Christian Petrie (ORNL), Andrew Nelson (ORNL)
Thermomechanical Evaluation of Fracture Methods on TRISO Fuel Behavior
10:30–10:50AM CST
R.T. Sweet (INL), G. Singh (INL), J.A. Hirschhorn (INL), W. Jiang (INL)
Finite-Element-Based Thermomechanical Property Correlations for TRISO Fuels
10:50–11:10AM CST
Sam Heflin (LANL), Dan Kotlyar (Georgia Tech), Vedant Mehta (LANL), Holly Trellue (LANL)
Presentation Slides (Visible to Attendees)
Anisotropy of Pyrocarbon Layers in Irradiated TRISO Fuel
11:10–11:30AM CST
W.F. Cureton (ORNL), T.J. Gerczak (ORNL), G.W. Helmreich (ORNL), D.J. Skitt (ORNL), J.D. Hunn (ORNL)
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