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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.
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2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
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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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Former Exelon CEO Chris Crane remembered for “transformational milestones”
Crane
Exelon announced that Chris Crane, the company’s former chief executive, passed away on Saturday in Chicago at the age of 65.
Crane served as the company’s president and CEO from 2012 until his retirement in December 2022. During his tenure, he steered the energy company through several transformational milestones, including the successful mergers with Constellation Energy in 2012 and Pepco Holdings in 2016, creating the largest utility business by customer count in the United States.
In 2022, with the spin-off of Constellation as the generation and retail side of energy business (with the largest U.S. nuclear fleet), Crane led the creation of a stand-alone transmission and delivery energy company.
Joseph J. Cambareri (NCSU), Jun Fang (ANL), Andre Gouws, Igor A. Bolotnov (NCSU)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 335-340
Understanding the dynamics behind bubbly flows is critical to the analysis of a pressurized water reactor (PWR) system, but there are still phenomena within bubbly flows that are not fully understood. Utilizing direct numerical simulations (DNS) coupled with interface tracking methods (ITM), high-fidelity numerical data can be extracted from bubbly flow simulations for use in the development of closure laws and mechanistic models. With the use of a bubble tracking algorithm that can record information specific to individual bubbles within the flow, numerical data can be gathered on a fundamental level. State-of-the-art high performance computing (HPC) facilities were used to simulate two-phase, turbulent flow within the subchannel of a PWR for both a simple subchannel geometry and one with a spacer grid and mixing vanes included. A statistical analysis of the numerical data gathered from these simulations can then be studied to discover the dependency of bubble dynamics upon flow conditions. Bubbles can be split into groups in relation to their distance to the wall, and the dependency of quantities such as the relative velocity or the drag coefficient upon the distance to the wall can be investigated. This work splits previously generated numerical data into seven bubble groups for further statistical analysis, as well as dividing the subchannel into “quadrants” to check for time averaged imbalances in bubble population resulting from geometric influences. These post processing techniques seek to offer insight into the physics behind bubbly flow conditions.