ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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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Nuclear Science and Engineering
June 2024
Nuclear Technology
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Latest News
Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
Bartlomiej Z. Wierzbicki, Steven P. Antal, Michael Z. Podowski
Nuclear Technology | Volume 158 | Number 2 | May 2007 | Pages 261-274
Technical Paper | Nuclear Reactor Thermal Hydraulics | doi.org/10.13182/NT07-A3841
Articles are hosted by Taylor and Francis Online.
The ability to predict the shape of gas/liquid interface is important for various multiphase flow and heat transfer applications. Specific issues of interest to nuclear reactor thermal hydraulics include the evolution of the shape of bubbles attached to solid surfaces during nucleation, bubble/surface interactions in complex geometries, etc. The development of an innovative approach to model the time-dependent shape of gas/liquid interfaces is discussed. The proposed approach combines a modified level-set method with an advanced computational fluid dynamics code, NPHASE. The coupled numerical solver can be used to simulate the evolution of gas/liquid interfaces in two-phase flows for a variety of geometries and flow conditions.The novel aspects of the work include the development of direct coupling between the level-set algorithm and the finite-volume code NPHASE, the development of a novel mass conservation algorithm for the level-set method, the analysis of the influence of fluid physical properties on the predicted bubble flow conditions, and the use of a three-dimensional model to simulate gas bubble flow in channels of various geometries and orientations.