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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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. AL
Nuclear Technology | Volume 69 | Number 2 | May 1985 | Pages 178-185
Chemical Processing | doi.org/10.13182/NT85-A33629
Articles are hosted by Taylor and Francis Online.
A new procedure has been developed to decontaminate carbonate wash streams relevant to the Purex process from alpha-emitting actinides (238U, 237Np, 240Pu) and the fission products (95Zr, 144Ce, 106Ru). The actinides, forming with Na2CO3 carbonato complexes, for example, [UO2(CO3)3]4-, [NpO2(CO3)3]4-, and unstable Pu(IV) complexes, are retained on the weakly basic anion exchanger resin Bio Rex 5. Plutonium(IV) forms complexes or precipitates nearly completely, when standing for some time or heating up to 70°C. The precipitate can be separated from the carbonate solution by a 2-µm filter mounted in front of the column. Neptunium and the fission products coprecipitate partially at the same time and therefore are also retained. Uranium and the species (neptunium and fission products) remaining in the filtrate are also removed by the Bio Rex 5 column, whereby the effluent of the column is decontaminated to >99%. The recovery of the actinides and fission products from the resin and the filter is performed with three column volumes of 4MHNO3 >99%.
