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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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Latest News
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.
Jon M. Rodabaugh
Nuclear Technology | Volume 87 | Number 4 | December 1989 | Pages 1117-1121
Late Paper | TMI-2: Decontamination and Waste Management / Radioactive Waste Management | doi.org/10.13182/NT89-A27703
Articles are hosted by Taylor and Francis Online.
When the Three Mile Island Unit 2 core failed, molten core material melted through the peripheral region of the core support structure and flowed outside the normal confines of the core region into a normally inaccessible area behind the baffle plates. This molten core material flowed completely around the circumference of the core region and down into the lower head of the reactor vessel. As a result of this material relocation, a significant portion of the core support assembly must be disassembled to recover this material.
