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
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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.
W. Van Snyder
Nuclear Technology | Volume 209 | Number 11 | November 2023 | Pages 1840-1858
Note | doi.org/10.1080/00295450.2023.2205551
Articles are hosted by Taylor and Francis Online.
In April 1961, Atomic Power Development Associates (APDA) produced the “Summary of the APDA Fuel Development Programs.” Chapter XVII described a paste fuel concept. The report noted that there are “advantages inherent in a mobile-fueled reactor.” Patent number 3,169,117, entitled “Nuclear Reactor Paste Fuel Composition,” was issued on May 9, 1961. In May 1964, Argonne National Laboratory produced the “Catalog of Nuclear Reactor Concepts.” The chapter concerning paste fuels concluded: “The few paste-fuel concepts developed to date and the present early stages of such developments show that considerably more work probably will be required before the paste-fuel concept can be considered for commercial development.” This monograph enlarges upon and quantifies the APDA concept, which appears not to have been pursued. Additional passive safety concepts that might also eliminate the need for control assemblies are described. Several important consequences of continuously processed fuel that are not discussed in the APDA report are described in this paper, in particular, that the “iodine pit” startup control instability can be eliminated.
