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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
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Man-Shik Song, Paul J. Turinsky
Nuclear Science and Engineering | Volume 101 | Number 2 | February 1989 | Pages 117-132
Technical Paper | doi.org/10.13182/NSE89-A23601
Articles are hosted by Taylor and Francis Online.
An improved understanding of boiling film dynamics as it relates to energetic steam explosions during degraded core conditions in light water reactors is developed. Several models have been developed and used to predict the characteristics of film boiling when a molten fuel drop suddenly comes into contact with water. An incompressible model and an approximate compressible model, utilizing Gilmore’s equation, are developed consistent with past works and are determined to have several shortfalls. To improve the treatment of compressibility effects, a model employing Lagrang-ian equations is developed. This improved model predicts that applying an external pressure pulse can make a stable film go unstable and decreasing water subcooling stabilizes film oscillations; both predictions are consistent with experimental observations. However, the improved model predicts stable film boiling at low melt temperatures that cannot support such boiling. Modeling Taylor surface instability effects at the water/steam interface indicates that the surface area change due to this surface instability can stabilize the film oscillations.