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
Sep 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
October 2025
Nuclear Technology
September 2025
Fusion Science and Technology
Latest News
PR: American Nuclear Society welcomes Senate confirmation of Ted Garrish as the DOE’s nuclear energy secretary
Washington, D.C. — The American Nuclear Society (ANS) applauds the U.S. Senate's confirmation of Theodore “Ted” Garrish as Assistant Secretary for Nuclear Energy at the U.S. Department of Energy (DOE).
“On behalf of over 11,000 professionals in the fields of nuclear science and technology, the American Nuclear Society congratulates Mr. Garrish on being confirmed by the Senate to once again lead the DOE Office of Nuclear Energy,” said ANS President H.M. "Hash" Hashemian.
L. Bühler
Fusion Science and Technology | Volume 52 | Number 3 | October 2007 | Pages 595-602
Technical Paper | First Wall, Blanket, and Shield | doi.org/10.13182/FST07-A1553
Articles are hosted by Taylor and Francis Online.
In a systematic parametric study 3D MHD flows in expansions of rectangular ducts with different expansion ratios, expansion lengths, and various wall conductivities are analyzed for fusion relevant parameters in order to establish a data base useful for the design of liquid metal blankets for fusion reactors. In currently considered helium-cooled liquid metal blankets the liquid metal velocities are very small so that inertia is often negligible in comparison with the electromagnetic forces. In the core of the flow the major balance of forces establishes between pressure and Lorentz forces while viscous forces are confined to very thin boundary layers along the duct walls. Near the expansion an intense exchange of flow between the upstream and downstream cores with the corresponding side layers is observed. At the expansion a large fraction of the flow is carried by these thin layers along the side walls. This effect becomes more pronounced with decreasing the length of the expansion region. The three-dimensional flow near the expansion gives rise to additional electric currents, which are responsible for higher pressure drop compared with fully developed conditions. This additional pressure drop and the flow partitioning between cores and side layers are investigated in detail depending on the relevant governing parameters.