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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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!
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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.
Min Gao, Yi Shi
Nuclear Science and Engineering | Volume 199 | Number 2 | February 2025 | Pages 325-337
Note | doi.org/10.1080/00295639.2024.2363089
Articles are hosted by Taylor and Francis Online.
In this work, we develop a modified implicit Monte Carlo method for the frequency-dependent (multigroup) three-temperature (3T) radiative transfer equations. A new reformulation of the 3T model is utilized to deal with the coupling between the electron and ion energies. This will result in an effective scattering term, together with a combination source term of electron and ion energies, which can be resolved by the Monte Carlo simulations. The method is proven to retain the asymptotic preserving property in the limit where the electron-ion coupling coefficient tends to zero or infinity. Furthermore, numerical simulations confirm the unconditional stability of the new method as well as its ability to preserve the total energy conservation. Several numerical results are presented to showcase the efficacy of this new method.
