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
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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
Jul 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
August 2024
Nuclear Technology
Fusion Science and Technology
Latest News
ARPA-E announces $40 million to develop transmutation technologies for UNF
The Department of Energy’s Advanced Research Projects Agency–Energy (ARPA-E) announced $40 million in funding to develop cutting-edge technologies to enable the transmutation of used nuclear fuel into less-radioactive substances. According to ARPA-E, the new initiative addresses one of the agency’s core goals as outlined by Congress: to provide transformative solutions to improve the management, cleanup, and disposal of radioactive waste and spent nuclear fuel.
T. Höhne, D. Lucas
Nuclear Science and Engineering | Volume 194 | Number 10 | October 2020 | Pages 859-872
Technical Paper | doi.org/10.1080/00295639.2020.1764265
Articles are hosted by Taylor and Francis Online.
This technical paper presents an application of the GEneralized TwO Phase flow (GENTOP) model for phase transfer and discusses the submodels used. Boiling of a heated surface under atmospheric conditions is simulated by the multifield computational fluid dynamics (CFD) approach. Subcooled water in a generic pool is heated up first in the near-wall region leading to the generation of small bubbles. Farther away from the bottom wall, larger bubbles are generated by coalescence and evaporation. The CFD simulation is based on the recently developed GENTOP concept. It is a multifield model using the Euler-Euler approach, and it allows the consideration of different local-flow morphologies, including transitions between them. Small steam bubbles are handled as dispersed phases, while the interface of large gas structures is statistically resolved. The multiscale simulation of the transitions from small bubble to larger structures during boiling in a pool is now feasible. However, the GENTOP submodels need a constant improvement and a separate, intensive validation effort using CFD-grade experiments.