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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.
K. Wisshak, F. Käppeler
Nuclear Science and Engineering | Volume 69 | Number 1 | January 1979 | Pages 39-46
Technical Paper | doi.org/10.13182/NSE79-A21283
Articles are hosted by Taylor and Francis Online.
The neutron capture cross sections of 240Pu and 242Pu were measured in the energy range from 50 to 250 keV, using 197Au as a standard. Neutrons were produced via the T(p,n) reaction with the Karlsruhe 3-MV pulsed Van de Graaff accelerator. Capture events were detected by a Moxon-Rae detector. A flight path as short as 66 mm was used in the measurements to obtain a sufficient signal-to-background ratio. An overall uncertainty of 7 to 11% was obtained for 240Pu and of 10 to 15% for 242Pu. In the region of overlap between 50 and 90 keV, the presented data agree with our previous results. They confirm the existing data for 240Pu. Discrepancies up to 30% for 240Pu and 242Pu were found in the evaluated ENDF/B-IV files while KEDAK 3 fits reasonably well to the experimental data.
