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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.
Dov Ingman, Amos Notea
Nuclear Technology | Volume 72 | Number 1 | January 1986 | Pages 99-104
Technical Paper | Radioisotopes and Isotope | doi.org/10.13182/NT86-A33758
Articles are hosted by Taylor and Francis Online.
The definition of edge is essential for dimension extraction from radiographic testing. One of the straightforward techniques for edge enhancement is the use of the derivative operator. This technique is analyzed for various types of edges on the basis of general definition of the edge. The radiographic response is considered as a convolution of ideal image with a blurring function. The types of edges responding to the technique with sufficient accuracy are found, while in other cases this technique is not recommended. The derivative approach is demonstrated for the localization of edges in a calibrated reactor fuel element tested by neutron radiography. The radiograph is digitized with an automatic microdensitometer, and the limitations of the method are shown for pellet axial and radial edges.
