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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
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.”
Dong-Yuan Sheng, David Mauritzson, Sven Perzon (Westinghouse Electric Sweden), Karen Fujikawa, Bobby Bakshi (Westinghouse)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 351-356
A full scale test program was designed to study the slip joint leakage flow instability. A number of cases were tested with different operating conditions and slip joint modifications (simulated wear). A Slip Joint Extension (SJE) design, developed by Westinghouse (WEC) that stabilizes the leakage flow was designed and installed. The design is applicable to a BWR/4 configuration. It is found that the vibration level with the WEC SJE installed is much lower than the baseline case and the high level vibration frequency seen in the baseline data is not presented with the fix installed.
A 3D CFD model is used to study the flow phenomena in the narrow gaps of slip joint. The result shows that leakage mass flow decreases and turbulence kinetic energy decrease significantly with the SJE design. This means that the extension of gap flow passage can effectively decrease the flow fluctuations to suppress the leakage-flow-induced vibration. The experimental and CFD results confirmed that the SJE offers a low-cost, low-risk effective solution that eliminates jet pump flow-induced vibration (FIV) by changing the flow across the slip joint from divergent (unstable) to convergent (stable).