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
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
May 2025
Nuclear Technology
Fusion Science and Technology
Latest News
TerraPower begins U.K. regulatory approval process
Seattle-based TerraPower signaled its interest this week in building its Natrium small modular reactor in the United Kingdom, the company announced.
TerraPower sent a letter to the U.K.’s Department for Energy Security and Net Zero, formally establishing its intention to enter the U.K. generic design assessment (GDA) process. This is TerraPower’s first step in deployment of its Natrium technology—a 345-MW sodium fast reactor coupled with a molten salt energy storage unit—on the international stage.
Masaaki Uchida, Michio Ichikawa
Nuclear Technology | Volume 51 | Number 1 | November 1980 | Pages 33-44
Technical Paper | Fuel | doi.org/10.13182/NT80-A32554
Articles are hosted by Taylor and Francis Online.
Three Zircaloy-clad UO2 test fuel rods were irradiated at 50 kW/m to a burnup of 15 000 MWd/MTU with an in-pile rod diameter scanning device, and cladding deformations were measured at various power and bumup levels. Major mode of deformation was ridging at pellet interface positions. Magnitude and relevant power levels for various modes of cladding deformation were found to be strongly dependent on initial pellet-cladding gap size. During the first approach to power, smaller gap size caused larger cladding deformation; however, the effect was reversed at higher burnup. Cladding diametral deformation was found to be dictated not only by local thermal expansion of a single pellet, but also by long-range axial force in the pellet stack. In the first power cycle, cladding deformations caused by power ramp were found to decrease during subsequent power holding, but their rate was much reduced at high burnup.
