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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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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Senate EPW Committee to hold Nieh nomination hearing
Nieh
The Senate Environment and Public Works Committee will hold a nomination hearing Wednesday for Ho Nieh, President Donald Trump’s nominee to serve as commission at the Nuclear Regulatory Commission.
Trump nominated Nieh on July 30 to serve as NRC commissioner the remainder of a term that will expire June 30, 2029, as Nuclear NewsWire previously reported.
Nieh has been vice president of regulatory affairs at Southern Nuclear since 2021, though since June 2024 he has been at the Institute of Nuclear Power Operations as a loaned executive.
A return to the NRC: If confirmed by the Senate, Nieh would be returning to the NRC after three previous stints totaling nearly 20 years.
Faten N. Al Zubaidi, Kyle L. Walton, Robert V. Tompson, Tushar K. Ghosh, Sudarshan K. Loyalka
Nuclear Technology | Volume 205 | Number 7 | July 2019 | Pages 951-963
Regular Technical Paper | doi.org/10.1080/00295450.2019.1573618
Articles are hosted by Taylor and Francis Online.
The total hemispherical emissivity of A508/A533B alloy steels was measured for conditions of interest in nuclear plant safety. The effect of long-term oxidation on the emissivity of A508/A533B was simulated by oxidizing test samples using a three-zone tube furnace at temperatures of 573 and 773 K. An apparatus built and operated in compliance with the American Society for Testing and Materials C835-06 testing standard was used to measure the total hemispherical emissivity for the following surface conditions: (1) mirror-like polished (unoxidized), (2) polished surface oxidized in air, (3) wire-cut electrical discharge machining (EDM), and (4) EDM-cut surface oxidized in air. The emissivity of polished (unoxidized) A508/A533B strips varied from 0.16 to 0.24 within the temperature range from 552 to 1180 K. Increasing the oxidation time of polished A508/A533B from 10 to 100 h at 573 K provided slight increase in emissivity, whereas increasing the oxidation temperature from 573 to 773 K for a 10-h duration provided over a threefold increase in emissivity. EDM-cut surfaces had an emissivity of 0.51 at 464 K to 0. 54 at 845 K due to the inherent roughness and the presence of a recast layer and possible oxidation layer. Oxidizing EDM-cut A508/A533B in air at 573 K increased the emissivity compared to the unoxidized EDM-cut A508/A533B, but no additional increase in emissivity occurred from 500- to 1000-h durations. Further oxidation of A508/A533B oxidized at 573 K for 1000 h for an additional 500 h at 773 K resulted in spallation of the oxide layer. The emissivity of the sample with loose oxide removed had similar emissivity for EDM-cut A508/A533B at 537 K.