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
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
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.
Bruce A. Pregger, Charles S. Olsen
Nuclear Technology | Volume 87 | Number 4 | December 1989 | Pages 875-883
Technical Paper | TMI-2: Decontamination and Waste Management / Material | doi.org/10.13182/NT89-A27681
Articles are hosted by Taylor and Francis Online.
A scanning electron microscope is used to investigate techniques for performing microanalysis of highly radioactive material from the Three Mile Island Unit 2 reactor. Wavelength dispersive X-ray (WDX) spectrometer methods allow quantitative analysis of metallic and oxide phases in samples with radiation fields of up to 60 R/h (contact β-γ). It is found that sputtered gold provides an unexpectedly useful specimen coating for remote analysis, being easily applied and forming more uniform layers than evaporated carbon, and proving compatible with quantitative point analysis. Through a combination of electron imaging, shielded energy dispersive spectrometry, WDX dot mapping, and quantitative WDX point analysis, it is possible to obtain data on core metal oxidation, trace concentration fission product distribution, and phase composition for core temperature estimation.
