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
Operations & Power
Members focus on the dissemination of knowledge and information in the area of power reactors with particular application to the production of electric power and process heat. The division sponsors meetings on the coverage of applied nuclear science and engineering as related to power plants, non-power reactors, and other nuclear facilities. It encourages and assists with the dissemination of knowledge pertinent to the safe and efficient operation of nuclear facilities through professional staff development, information exchange, and supporting the generation of viable solutions to current issues.
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
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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.
J. C. Manaranche, D. Mangin, L. Maubert, G. Colomb, G. Poullot
Nuclear Technology | Volume 50 | Number 2 | September 1980 | Pages 148-157
Technical Paper | Fuel Cycle | doi.org/10.13182/NT80-A32540
Articles are hosted by Taylor and Francis Online.
The Nuclear Safety Department of the French Commissariat à l’Energie Atomique has achieved an important experimental program relating to the criticality of 4.75-wt%-235U-enriched UO2 rods in water with various configurations. Two steps of this program are set out. The first one consisted of doing the parametric study of regular lattices of rods in a sodium nitrate solution (study connected with the problems raised by the dissolution of irradiated elements). The results obtained show the poisoning effect due to the nitrate ion at various concentrations. The second step concerns the study of the effect due to the interpositioning of hydrogenous materials between four 18 × 18 assemblies at 13.5-mm square pitch (study connected with the problems raised by the accidental sprinkling of a mist into a fuel storage). The results obtained allow one to determine the optimum theoretical moderation conditions for the storage of new fuel elements. In all cases the theoretical results are in good agreement with experimental results.
