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
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.
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
May 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
June 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Securing the advanced reactor fleet
Physical protection accounts for a significant portion of a nuclear power plant’s operational costs. As the U.S. moves toward smaller and safer advanced reactors, similar protection strategies could prove cost prohibitive. For tomorrow’s small modular reactors and microreactors, security costs must remain appropriate to the size of the reactor for economical operation.
Philippe J. Vernier, Philippe Solignac
Nuclear Technology | Volume 77 | Number 1 | April 1987 | Pages 82-91
Technical Paper | Heat Transfer and Fluid Flow | doi.org/10.13182/NT87-A33954
Articles are hosted by Taylor and Francis Online.
Our work was restricted to elementary models of condensation, coupling a laminar water film with an air-steam mixture boundary layer, under steady-state conditions, for some simple physical situations. We tested two categories of models. The models in the first category are merely the set of balance equations for which Sparrow’s numerical solutions have been replaced by Rose’s closed-form solutions. The models in the second category make use of correlations of mass transfer obtained by the Chilton-Colburn analogy and assumed closure laws concerning heat transfer across the film. The closed form of the solutions enabled us to propose numerical algorithms without integration, which we programmed in BASIC language. The differences we found between the results of the experiment and those of the models are systematic and positive, the calculated values being 50% less than the experimental results, on average. Comparing the abilities of the models, the situation of laminar-forced convection along a flat plate, whether the mixture is superheated or not, is the only situation where the model, using boundary layer theory, gives exact results. For the situation of turbulent free convection along a vertical wall, e.g., the containment wall of a pressurized water reactor system, the model, using the Chilton-Colburn analogy, gives only approximate results.