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Conference Spotlight
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.
Yigal Ronen, Samuel Carmona
Nuclear Science and Engineering | Volume 74 | Number 2 | May 1980 | Pages 84-94
Technical Paper | doi.org/10.13182/NSE80-A19625
Articles are hosted by Taylor and Francis Online.
Water breeder reactors based on thermal water reactors have the advantages of a well-proven technology, a wide operational experience, and an acceptable safety status, the latter from using water as a coolant and having a negative void coefficient. Water breeder reactors are now in operation for the 232Th-233U cycle and are being designed for the 238U-Pu cycle. This paper proposes a water breeder system in which two reactors operate in symbiosis, one using 238U-233U as fuel and producing plutonium, and the other using 232Th-Pu as fuel and producing 233U. Thus, each reactor feeds the other. From the breeding point of view, the combined system has an advantage over the separate 238U-Pu and 233Th-233U cycles.
