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.
Explore membership for yourself or for your organization.
Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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
Aug 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
September 2025
Nuclear Technology
August 2025
Fusion Science and Technology
Latest News
Ho Nieh nominated to the NRC
Nieh
President Trump recently nominated Ho Nieh for the role of commissioner in the Nuclear Regulatory Commission through the remainder of a term that will expire June 30, 2029.
Nieh has been the vice president of regulatory affairs at Southern Nuclear since 2021, though he is currently working as a loaned executive at the Institute of Nuclear Power Operations, where he has been for more than a year.
Nieh’s experience: Nieh started his career at the Knolls Atomic Power Laboratory, where he worked primarily as a nuclear plant engineer and contributed as a civilian instructor in the U.S. Navy’s Nuclear Power Program.
From there, he joined the NRC in 1997 as a project engineer. In more than 19 years of service at the organization, he served in a variety of key leadership roles, including division director of Reactor Projects, division director of Inspection and Regional Support, and director of the Office of Nuclear Reactor Regulation.
Werner Faubel, Sameh A. Ali
Nuclear Technology | Volume 86 | Number 1 | July 1989 | Pages 60-65
Technical Paper | Radioactive Waste Management | doi.org/10.13182/NT89-A34282
Articles are hosted by Taylor and Francis Online.
The technical feasibility of partitioning concentrated nitric acid intermediate-level waste (ILWC) solutions from the Purex process into a small volume of high-level waste and a large volume of low-level waste using sorption methods is demonstrated for 1-ℓ batches. Cesium-134 and 137Cs are selectively separated with a decontamination factor (DF) greater than 1 × 105 in a newly developed “suspended-bed” column filled with the microporous inorganic exchanger ammonium molybdophosphate. The 125Sb and the actinides and lanthanides with a 3+ valence state are retained with DFs between 40 and 1000 on metal oxides of antimony and manganese and on an extraction column containing n-octyl(phenyl) N,N-diisobutyl carbamoyl methyl phosphine oxide, respectively. Ruthenium-106 and 60Co are removed in a column loaded with dimethyl glyoxime and have DFs greater than 20. The amount of secondary wastes arising from absorber materials is calculated to be 300 kg for a 350 t/yr reprocessing plant with an ILWC volume of ∼0.5 m3/t of heavy metal.
