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
Nuclear Criticality Safety
NCSD provides communication among nuclear criticality safety professionals through the development of standards, the evolution of training methods and materials, the presentation of technical data and procedures, and the creation of specialty publications. In these ways, the division furthers the exchange of technical information on nuclear criticality safety with the ultimate goal of promoting the safe handling of fissionable materials outside reactors.
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!
Latest Magazine Issues
Mar 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
April 2024
Nuclear Technology
Fusion Science and Technology
February 2024
Latest News
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?
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.