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!
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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.
M. Coquerelle, J. Gabolde, R. Lesser, P. Werner
Nuclear Technology | Volume 16 | Number 1 | October 1972 | Pages 110-119
Technical Paper | Reactor Materials Performance / Material | doi.org/10.13182/NT72-A31180
Articles are hosted by Taylor and Francis Online.
The European Institute for Transuranium Elements has performed a series of mixed-oxide irradiation experiments in the Dounreay Fast Reactor. The main parameters varied were the O/M ratio of the fuel, radial fuel distribution, and fuel form. Three low burnup experiments with nine pins were terminated in 1969. Eight of the corresponding nine high burnup pins were removed from the reactor subsequently, after several intermediate nondestructive examinations. One pin is further irradiated. Three of the eight pins failed. The Inconel-625 claddings of the sound pins did not change their o.d. at a total neutron dose of 7.3 × 1022 n/cm2. The three pins of the DS-2 experiment, in which fuels with different O/M ratios have been irradiated to a burnup of 7.3 at.%, were examined destructively. A low initial O/M (1.94) led to a negligible attack of the cladding at a maximum temperature of 650°C, whereas fuel of stoichiometric composition corroded severely. No influence of the different O/M on the swelling was detected. The reduction of the O/M ratio to low values seems to increase the risk of central fuel melting.
