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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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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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
Vogtle-3 shuts down for valve issue
One of the new Vogtle units in Georgia was shut down unexpectedly on Monday last week for a valve issue that has since been investigated and repaired. According to multiple local news outlets, Georgia Power reported on July 17 that Unit 3 was back in service.
Southern Company spokesperson Jacob Hawkins confirmed that Vogtle-3 went off line at 9:25 p.m. local time on July 8 “due to lowering water levels in the steam generators caused by a valve issue on one of the three main feedwater pumps.”
Yehong Liao, Karen Vierow
Nuclear Technology | Volume 167 | Number 1 | July 2009 | Pages 13-19
Technical Paper | NURETH-12 / Thermal Hydraulics | doi.org/10.13182/NT167-13
Articles are hosted by Taylor and Francis Online.
In modeling condensation from vapor-gas mixtures with the heat and mass transfer analogy, there are two parallel methods in the literature to account for variable property effects: (a) the property ratio scheme using an empirical factor as a multiplier for the mass flux and (b) the reference property scheme using reference properties to calculate the mass flux. The current work focuses on the reference property scheme and establishes its relation to the property ratio scheme. From condensation boundary layer analysis, the current work proposes a reference mixture composition and a reference mixture temperature, which can be used for calculation of a variety of reference thermodynamic and transport properties. It is demonstrated that the empirical factor in the property ratio scheme used widely in the literature can be obtained from the reference property scheme derived in the current work, and thus, the two parallel methods to account for variable property effects are equivalent. A common mistake in using the reference mixture composition is highlighted as part of this investigation. The reference property scheme presented herein has a theoretical basis and is more accurate over a wide range of conditions than the empirical property ratio scheme. Finally, the reference property scheme is extended to multicomponent gases.