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
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!
Latest Magazine Issues
Jul 2024
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Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Four million nuclear jobs by 2050: Who will do them?
Industry leaders from around the globe met this month to discuss the talent development that will be necessary for the long-term success of the nuclear industry.
The International Conference on Nuclear Knowledge Management and Human Resources Development, hosted by the International Atomic Energy Agency, was held in Vienna earlier this month. Discussed there was the agency’s forecast for nuclear capacity to more than double—or hopefully triple—by 2050 and the requirement of more than four million professionals to support the industry.
S. Mostafa Ghiaasiaan
Nuclear Technology | Volume 81 | Number 1 | April 1988 | Pages 28-38
Technical Paper | Fission Reactor | doi.org/10.13182/NT88-A34076
Articles are hosted by Taylor and Francis Online.
A model was developed to simulate thermal-hy-draulic phenomena in the downcomer and lower plenum of a pressurized water reactor during reflooding. The system dynamics were formulated in terms of a set of time-dependent ordinary differential equations that were integrated numerically. A model was developed to simulate the oscillatory flow in the downcomer-lower plenum-core system. A numerical procedure was devised for solving the governing global momentum equation. This procedure is shown to be numerically stable and computationally efficient. The developed model for downcomer and lower plenum was coupled to the core thermal-hydraulic model, and predictions were made for FLECHT-SET experimental data. The results compared well with the experiment.
