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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.
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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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Latest News
Digital control system installed at China’s Linglong One
Earlier this month, the first digital control system was put in place at Linglong One, a small modular reactor demonstration project being built at the Changjiang nuclear power plant in Hainan Province. This is the world’s first land-based commercial SMR and is controlled by China National Nuclear Power Co. Ltd., a subsidiary of the China National Nuclear Corporation (CNNC).
E. Merzari, H. Ninokata, R. Mereu, E. Colombo, F. Inzoli
Nuclear Technology | Volume 175 | Number 3 | September 2011 | Pages 538-552
Technical Paper | NURETH-13 Special / Thermal Hydraulics | doi.org/10.13182/NT10-148
Articles are hosted by Taylor and Francis Online.
Three-dimensional bounded jets are important in a variety of engineering applications. In nuclear engineering they are present in critical parts of several types of reactors (e.g., high-temperature gas-cooled reactors and boiling water reactors). The simulation of parallel jets through steady-state computational fluid dynamics has often proved to be problematic, in particular, when identical jets are simulated. In the present work the simulation of parallel jet mixing by the unsteady Reynolds-averaged Navier-Stokes (URANS) methodology has been carried out. Such methodology has the potential to improve the results of steady-state simulations at a limited computational cost. The experimental setup of Kunz et al., consisting of five parallel pipe jets mixing in a rectangular confinement, has been chosen as a benchmark test because of its similarity to the geometry of the IRIS reactor.The ensemble-averaged time-dependent Navier-Stokes equations have been solved through the finite volume code STAR-CD 4.06.Several computational models, mesh types, and resolutions have been tried. The results confirm that steady-state calculations tend to underestimate the spreading (mixing) of the jets. In particular, the spreading is acceptable in the near inlet region, while a strong discrepancy is observed far from the inlet. The results of the transient simulations indicate a stable oscillatory behavior downstream from the jet inlets, and the results are in better agreement with the test data. Additional large-eddy simulation calculations performed with the code FLUENT 6.3.26 have also been carried out in order to provide further insight into the URANS methodology results.