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Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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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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Can hydrogen be the transportation fuel in an otherwise nuclear economy?
Let’s face it: The global economy should be powered primarily by nuclear power. And it probably will by the end of this century, with a still-significant assist from renewables and hydro. Once nuclear systems are dominant, the costs come down to where gas is now; and when carbon emissions are reduced to a small portion of their present state, it will become obvious that most other sources are only good in niche settings. I mean, why use small modular reactors to load-follow when they can just produce that power instead of buffering it?
Min Seop Song, Eung Soo Kim (Seoul Natl Univ), Jae Ho Jeong (KAERI)
Proceedings | Advances in Thermal Hydraulics 2018 | Orlando, FL, November 11-15, 2018 | Pages 531-546
The wire-wrapped pin bundle is the most commonly adopted form of the fuel assembly in SFRs. It is challenging to measure the local flow velocity field experimentally because of its narrow channel and complex internal shape. In this study, the refractive indices of the fluid and the test-section are matched and the flow field in the SFR wire-wrapped 19-pin bundle is visualized using optical measurement techniques such as PIV/LDV and compared with the RANS-based computational fluid dynamic (CFD) analysis. According to the turbulence intensity and the pressure drop measurements, it is observed that the flow regime changes from the transition regime to the fully turbulent regime when the Re number is more than 13,000. In addition, the pressure drop measurement results are compared with the CFD analysis for various turbulence models, and it is found that the BSL-RSM model predicts the experimental results the most accurately. The velocity distribution obtained in the edge sub-channel using PIV is also compared with the CFD results. As a result, the flow and vortex shapes are very similar to each other qualitatively. However, some discrepancies are observed quantitatively in the region where the channel thickness is narrow. The main reason is considered to be attributed to the pin location error, the refraction of light and the velocity averaging due to the thickness of the laser sheet incident on the thin channel during the experiment. Further investigation is on-going for analysis of flow in interior subchannel.