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
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.
J. A. Horak, T. H. Blewitt
Nuclear Technology | Volume 27 | Number 3 | November 1975 | Pages 416-438
Technical Paper | Material | doi.org/10.13182/NT75-A24315
Articles are hosted by Taylor and Francis Online.
The concentrations of lattice point defects produced by thermal-neutron and fast-neutron irradiation of copper, nickel, iron, titanium, and palladium at 4.5 K have been measured resisto-metrically, and the values are compared with the theoretically predicted values. For thermal-neutron irradiation the ratio of the predicted to measured concentration of defects ranged from a minimum of 1.0 for titanium to a maximum of 4.5 for palladium; for fast-neutron irradiation this ratio ranged from 2.3 for titanium to 6.5 for copper. On postirradiation is ochronal annealing no stage II or V are present in copper after thermal-neutron irradiation, but both these stages are present after fast-neutron irradiation. Both nickel and titanium exhibit more than 100% recovery, super-recovery, after thermal-neutron irradiation. The super-recovery is attributed to the irradia-tion-induced supersaturation of vacancies that provide the enhanced diffusion required for the precipitation of impurity atoms from the lattice. Little or no enhanced diffusion is observed after fast-neutron irradiation of nickel and titanium.