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.
Werner Faubel, Sameh A. Ali
Nuclear Technology | Volume 86 | Number 1 | July 1989 | Pages 60-65
Technical Paper | Radioactive Waste Management | doi.org/10.13182/NT89-A34282
Articles are hosted by Taylor and Francis Online.
The technical feasibility of partitioning concentrated nitric acid intermediate-level waste (ILWC) solutions from the Purex process into a small volume of high-level waste and a large volume of low-level waste using sorption methods is demonstrated for 1-ℓ batches. Cesium-134 and 137Cs are selectively separated with a decontamination factor (DF) greater than 1 × 105 in a newly developed “suspended-bed” column filled with the microporous inorganic exchanger ammonium molybdophosphate. The 125Sb and the actinides and lanthanides with a 3+ valence state are retained with DFs between 40 and 1000 on metal oxides of antimony and manganese and on an extraction column containing n-octyl(phenyl) N,N-diisobutyl carbamoyl methyl phosphine oxide, respectively. Ruthenium-106 and 60Co are removed in a column loaded with dimethyl glyoxime and have DFs greater than 20. The amount of secondary wastes arising from absorber materials is calculated to be 300 kg for a 350 t/yr reprocessing plant with an ILWC volume of ∼0.5 m3/t of heavy metal.
