ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
Reactor Physics
The division's objectives are to promote the advancement of knowledge and understanding of the fundamental physical phenomena characterizing nuclear reactors and other nuclear systems. The division encourages research and disseminates information through meetings and publications. Areas of technical interest include nuclear data, particle interactions and transport, reactor and nuclear systems analysis, methods, design, validation and operating experience and standards. The Wigner Award heads the awards program.
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!
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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.
Walter E. Clark, William B. Howerton
Nuclear Technology | Volume 49 | Number 2 | July 1980 | Pages 209-213
Nuclear Fuel Cycle | Fuel Cycle | doi.org/10.13182/NT80-A32483
Articles are hosted by Taylor and Francis Online.
Barium iodate, which is used as the vehicle for storing 129I in Portland cement concrete, is subject to radiolytic reduction to iodide. This could result in an increase in the leach rate of129I during storage due to the reduction of insoluble iodate to soluble iodide. The measured G value (ions of I- per 100 eV or per 1.602 × 10-17 J) was found to be 0.083 for concrete containing 9.05 wt% iodine. The reduction resulting from internal irradiation alone is quite small; only ∼0.21% of the stored 129I would be reduced in 1000 yr.
