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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.
Peter Hofmann, Mario Enrique Markiewicz, José Luis Spino
Nuclear Technology | Volume 90 | Number 2 | May 1990 | Pages 226-244
Technical Paper | Matetial | doi.org/10.13182/NT90-A34417
Articles are hosted by Taylor and Francis Online.
The chemical reaction behavior of B4C absorber material with stainless steel 1.4919 (Type 316) and Zircaloy-4 is studied in the 800 to 1600 C temperature range. The reaction kinetics for both systems can be described by parabolic rate laws. Above 1000°C, the reaction zone growth rates in the B4C/stainless steel system are about two orders of magnitude higher than those in the B4C/Zircaloy-4 system. The compatibility specimens are quickly and completely liquefied at temperatures ≥1250°C for the B4C/stainless steel reaction couples and temperatures ≥1650°C for the B4C/Zircaloy-4 reaction couples. In both reaction systems, liquefaction occurs below the melting points of the components.
