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
Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
Meeting Spotlight
2025 ANS Annual Conference
June 15–18, 2025
Chicago, IL|Chicago Marriott 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
Jun 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
July 2025
Nuclear Technology
Fusion Science and Technology
Latest News
Smarter waste strategies: Helping deliver on the promise of advanced nuclear
At COP28, held in Dubai in 2023, a clear consensus emerged: Nuclear energy must be a cornerstone of the global clean energy transition. With electricity demand projected to soar as we decarbonize not just power but also industry, transport, and heat, the case for new nuclear is compelling. More than 20 countries committed to tripling global nuclear capacity by 2050. In the United States alone, the Department of Energy forecasts that the country’s current nuclear capacity could more than triple, adding 200 GW of new nuclear to the existing 95 GW by mid-century.
G. Giacchetti, C. Sari, C. T. Walker
Nuclear Technology | Volume 28 | Number 2 | February 1976 | Pages 216-225
Technical Paper | Fuel | doi.org/10.13182/NT76-A31562
Articles are hosted by Taylor and Francis Online.
The distribution of the actinides and the composition of metallic fission-product inclusions and oxide inclusions in a mixed-nitride fuel irradiated to 1.29% FIMA in a fast flux has been investigated using an electronprobe microanalyser. Plutonium enrichment was found at open and healed cracks, and a significant decrease in plutonium concentration was measured in the region of the central void. Metallic inclusions were detected in a band at a radial position r/r0 -0.7 to 0.8. The inclusions were of two types: intermetallic compounds of the form UMe3, where Me =ruthenium, rhodium, and palladium, and molybdenum-technetium alloys. Plutonium was absent in all inclusions examined. Oxide inclusions were observed in the outer part of the fuel at r/r0 > 0.5. These were also of two types. The first contained ∼5 wt% plutonium and was situated in the interior of the grains. The second had a plutonium concentration of ∼18 wt% and was found at grain boundaries. The plutonium concentration of both types of inclusions was lower than the nominal concentration of the fuel matrix. During irradiation oxide inclusions were formed in the outer part of the fuel by the oxidation of sesquinitride precipitates. The limit of plutonium solubility in uranium sesquinitride is proposed to be ∼5 wt%.
