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
Aerospace Nuclear Science & Technology
Organized to promote the advancement of knowledge in the use of nuclear science and technologies in the aerospace application. Specialized nuclear-based technologies and applications are needed to advance the state-of-the-art in aerospace design, engineering and operations to explore planetary bodies in our solar system and beyond, plus enhance the safety of air travel, especially high speed air travel. Areas of interest will include but are not limited to the creation of nuclear-based power and propulsion systems, multifunctional materials to protect humans and electronic components from atmospheric, space, and nuclear power system radiation, human factor strategies for the safety and reliable operation of nuclear power and propulsion plants by non-specialized personnel and more.
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
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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.
Zhong Chen, Zi Jia Zhao, Zhongliang Lv, Yanyun Ma
Nuclear Technology | Volume 206 | Number 4 | April 2020 | Pages 637-650
Technical Note | doi.org/10.1080/00295450.2019.1653151
Articles are hosted by Taylor and Francis Online.
A water-flooded-core accident is a serious potential accident for high-temperature gas-cooled reactors (HTGRs). In this technical note, based on two different water-flooded-core scenarios, preliminary neutronics analysis was performed on a typical HTGR. Preliminary temperature-effect analysis is carried out as well. It is found that the neutron-slowing ability is the key for the effective multiplication factor of the HTGR core. More importantly, when the water-flooded-core accident occurs, the HTGR might return back to supercritical with the core temperature decreasing even if it is safely shut down at high operation temperature.
