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
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
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.
Donald J. Dudziak, R. A. Krakowski
Nuclear Technology | Volume 25 | Number 1 | January 1975 | Pages 32-55
Technical Paper | Reactor | doi.org/10.13182/NT75-A24347
Articles are hosted by Taylor and Francis Online.
Induced radioactivity and afterheat in fusion reactor blanket structures and magnetic coils are essential inputs for environmental impact studies. These quantities have been calculated for a reference theta-pinch reactor (RTPR) and compared with results reported for other fusion reactors and typical fast fission reactors. Major indepen-dent variables considered in the RTPR analysis were structural material (Nb—1% Zr, V—20% Ti), 14.1-MeV neutron wall loading (0.2 to 6.7 MW/m2), operating time (1 to 20 yr) and time after shutdown (0 to 30 000 yr). For a given operating time large radioactivity contributions from 95Nb render higher [Ci/W(th)J and {Ci/[W(th)yr]} values at higher wall loadings and <1 yr after shutdown. At long times after shutdown this dependence is reversed and represents an advantage relative to long-term radwaste storage. Activity from V— 20% Ti is insensitive to wall loading or operating time. For either material, afterheat power densities are about two orders of magnitude lower than for fission reactors.
