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
Thermal Hydraulics
The division provides a forum for focused technical dialogue on thermal hydraulic technology in the nuclear industry. Specifically, this will include heat transfer and fluid mechanics involved in the utilization of nuclear energy. It is intended to attract the highest quality of theoretical and experimental work to ANS, including research on basic phenomena and application to nuclear system design.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
May 2025
Nuclear Technology
April 2025
Fusion Science and Technology
Latest News
Norway’s Halden reactor takes first step toward decommissioning
The government of Norway has granted the transfer of the Halden research reactor from the Institute for Energy Technology (IFE) to the state agency Norwegian Nuclear Decommissioning (NND). The 25-MWt Halden boiling water reactor operated from 1958 to 2018 and was used in the research of nuclear fuel, reactor internals, plant procedures and monitoring, and human factors.
Arpita Datta, N. Sivaraman, T. G. Srinivasan, P. R. Vasudeva Rao
Nuclear Technology | Volume 182 | Number 1 | April 2013 | Pages 84-97
Technical Paper | Reprocessing | doi.org/10.13182/NT13-A15829
Articles are hosted by Taylor and Francis Online.
A single-stage dual-column chromatographic technique has been developed in this study for separation and determination of lanthanides in a uranium matrix. A 5-cm-length reversed-phase column coated with tri-n-octylphosphine oxide (TOPO) was connected in series to a 10-cm-length reversed-phase monolithic column (dynamically modified into a cation exchange column) to accomplish individual isolation of lanthanides from the uranium matrix. The proposed technique eliminates the step of uranium matrix removal for the determination of lanthanides. Samples with a lanthanide-to-uranium ratio (1 part lanthanide to 105 parts uranium) were directly injected into the dual column for the quantitative determination of lanthanides without uranium matrix removal. In some studies, samples of lanthanides in the uranium matrix could be injected as much as 45 times consecutively into a high-performance liquid chromatography system for determination of lanthanides without any uranium elution. The retention behavior of Pu(IV), Pu(III), Am(III), and fission products was also investigated on the TOPO-coated support. The single-stage dual-column chromatographic technique was demonstrated for the determination of fission products such as La and Nd in the dissolver solution of pressurized heavy water reactor spent fuel for the measurement of atom percent fission burnup. The technique can also be employed to estimate lanthanide impurities in samples of UO2 (1 part lanthanide to 106 parts uranium) without removal of the uranium matrix.