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.
Simon C. P. Wang, Clayton Collins, Samim Anghaie, E. Dow Whitney
Nuclear Technology | Volume 93 | Number 3 | March 1991 | Pages 399-411
Technical Paper | Material | doi.org/10.13182/NT91-A34534
Articles are hosted by Taylor and Francis Online.
Uranium fluoride gases are proposed as primary candidate fuels for ultrahigh-temperature gas core or vapor core reactor systems for a variety of space power applications. In these systems, the peak temperature of the fissioning gas can be as high as 5000 K and the inner wall temperature of the reactor cavity is within the range of 1000 to 2000 K. Two kinds of alumina, sapphire and polycrystal alpha alumina, and CaO partially stabilized zirconia are exposed to uranium hexafluoride gas in temperatures ranging from 973 to 1473 K and from 873 to 1073 K, respectively. Exposure tests are conducted in a UF6 flowing loop with an alumina reaction tube housed in a 1500 K electric-heated furnace.The reaction rates are measured using a discontinuous gravimetric method. The morphology of the exposed surfaces was observed by optical microscopy and scanning electron microscopy, and the reaction products were identified by X-ray diffraction and energy dispersive X-ray spectroscopy. Results indicate that alumina provides a relatively higher service temperature in UF6 environment. However, due to the highly reactive and chemically aggressive nature of UF6 at high temperatures, the maximum service temperature of alumina for a UF6-based gas core reactor is limited to 1273 K. Zirconia at temperatures above 973 K is not compatible with UF6.