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Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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Commercial nuclear innovation "new space" age
In early 2006, a start-up company launched a small rocket from a tiny island in the Pacific. It exploded, showering the island with debris. A year later, a second launch attempt sent a rocket to space but failed to make orbit, burning up in the atmosphere. Another year brought a third attempt—and a third failure. The following month, in September 2008, the company used the last of its funds to launch a fourth rocket. It reached orbit, making history as the first privately funded liquid-fueled rocket to do so.
Joseph L. Bottini, Sabrina Hammouti, David Ruzic, Caleb S. Brooks (Univ of Illinois)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 440-448
Boiling heat transfer is an effective method for transferring heat from system components, enabling high heat transfer rates from minimal surface superheats. While it is effective, two-phase heat transfer offers added complexities to single-phase heat transfer caused by the addition of deformable interfaces, dissimilar fluid properties, and phase transition. The critical heat flux (CHF) marks the upper limit of safe operation for many boiling heat transfer systems, and its prediction is essential to ensure safe operation. While much effort has been devoted to studying boiling heat transfer and CHF, the characteristics of the surface, such as wettability and roughness, influence the boiling heat transfer, but are not well understood. Heat transfer surfaces of varying wettability and roughness have been prepared, characterized, and subjected to flow experiments up to CHF to study the role the surface properties have in flow boiling heat transfer. The surfaces were prepared using a high-power laser to texture the surface altering the wettability and roughness. Increasing the roughness and decreasing the wettability are found to have competing effects on both the boiling curves and the CHF points. The onset of nucleate boiling (ONB) points are delayed for the lesswetting surfaces, and the CHF value is lower. An increase in roughness for the textured surface causes earlier ONB and increases CHF, but the CHF values are lower than for the original, polished surface. The roughness and wettability are demonstrated to be influential properties on both the boiling heat transfer and the CHF point, and are not well captured by the existing CHF models.