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
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
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
BWXT will scout potential TRISO fuel production sites in Wyoming
BWX Technologies Inc. announced today that its Advanced Technologies subsidiary has signed a cooperation agreement with the state of Wyoming to evaluate locations and requirements for siting a potential new TRISO nuclear fuel fabrication facility in the state.
Michael W. J. Lewis, Charles S. Campbell
Nuclear Technology | Volume 55 | Number 2 | November 1981 | Pages 460-469
Technical Paper | Materials | doi.org/10.13182/NT55-460
Articles are hosted by Taylor and Francis Online.
Steam generators for liquid-metal fast breeder reactors may be subject both to fretting wear as a result of flow-induced vibrations and to wear from larger amplitude sliding movements caused by thermal changes. Wear under these conditions is strongly adhesive so that in tests simulating the larger amplitude sliding of tubing through support plates, mechanical interaction of the wear scars results in high pseudo-friction forces for ferritic steels at the extremities of movement. With austenitic steel combinations in such tests, less wear is found but at temperatures above 500°C static adhesion after a period of dwell can give increased axial forces to initiate sliding, for example, up to three times the contact force at 560°C. A number of test mechanisms have been developed to evaluate the impact, impact-slide, and rubbing fretting behavior of these materials in sodium. With hemisphere-on-flat geometry, specific wear rates for austenitic steel combinations in impact-slide increase with temperature and decrease with time, while specific wear rates for ferritic steel combinations are approximately an order of magnitude greater (10−14 to 10−13 m3/Nm). In rubbing fretting, wear rates are broadly similar for austenitic and ferritic steel combinations. Specific wear rates decrease with slip amplitude and are of the order of 3 × 10−16 m3/Nm at 10 µm and 3 × 10−15 m3/Nm in excess of 100 µm.