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.
Explore membership for yourself or for your organization.
Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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
Oct 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
November 2025
Nuclear Technology
October 2025
Fusion Science and Technology
Latest News
Russia withdraws from 25-year-old weapons-grade plutonium agreement
Russia’s lower house of Parliament, the State Duma, approved a measure to withdraw from a 25-year-old agreement with the United States to cut back on the leftover plutonium from Cold War–era nuclear weapons.
A. Isaev, J. Felbinger, C. Evrim, R. Kulenovic, E. Laurien (Univ of Stuttgart)
Proceedings | 2018 International Congress on Advances in Nuclear Power Plants (ICAPP 2018) | Charlotte, NC, April 8-11, 2018 | Pages 325-334
Turbulent and stratified mixing flows can cause thermal fatigue in nuclear power plant piping systems. In order to diminish the investigation effort of thermal mixing flow phenomena, a geometrically similar isothermal Mixed Fluid Interaction (MFI) mixing tee using a sodium chloride solution to model the cold heavy branch pipe fluid is built. The purpose of the MFI experiments is to predict the flow phenomena in the vertical thermal mixing Fluid Structure Interaction (FSI) T-junction configuration at the University of Stuttgart. Due to limited optical accessibility of the FSI facility a numerical similarity comparison of the flow phenomena occurring in both experimental setups (MFI/FSI) is essential. Thus, Large Eddy Simulations are carried out which are experimentally validated by applying the Particle Image Velocimetry and Planar Laser Induced Fluorescence measurement techniques and as well as benchmark data. The similarity investigation confirms the usage of three characterizing parameters for the adaption of relevant physical boundary conditions to the FSI setup (branch pipe Reynolds number (??????), mixing Richardson number (????) and momentum ratio (????)). Thereby, the evidenced similarity ensures the utilization of the cold mixing experimental setup for the visual prediction of flow patterns occurring in the hot mixing FSI facility.