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
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
June 2025
Nuclear Technology
Fusion Science and Technology
May 2025
Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Kozo Gonda, Koichiro Oka
Nuclear Technology | Volume 64 | Number 1 | January 1984 | Pages 14-18
Technical Paper | Chemical Processing | doi.org/10.13182/NT84-A33322
Articles are hosted by Taylor and Francis Online.
A second heavier organic phase of tetravalent plutonium nitrate (plutonium third phase) was investigated on the formation requirement and the accumulation process in mixer-settlers, with 30% tributylphosphate (TBP) in n-dodecane. The amount of TBP of the third phase, which split from the organic phase, was twice as great as that of the source organic phase and was saturated with plutonium and nitric acid. The plutonium and nitric acid in the third phase were regulated in concentration by a relation of the solubility product, which gives the minimum of plutonium and nitric acid necessary to form the third phase. From the minimum of nitric acid, 185 g/ℓ of plutonium was estimated as the maximum concentration in the third phase, which agreed with the experimental data in another report. The accumulation process of the third phase in mixer-settlers was simulated with the use of a distribution relation of plutonium between the third phase and ∼30% TBP organic phase. The simulated results agreed well with the actual results of the plutonium concentration, the volume, and the distribution profile in stages, on the assumption that 5% of the plutonium third phase formed in the organic phase splits to the plutonium third phase and stays at the aqueous/organic interface of mixer-settlers.