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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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August 2024
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Latest News
Constellation seeks rezone for property adjacent to Illinois plant
While no development details have been released, Constellation is asking to rezone 658.8 acres of land it owns around the Byron nuclear plant in Illinois for possible long-term use.
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).