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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.
Claus Petersen, Gerhard Schanz, Siegfried Leistikow
Nuclear Technology | Volume 80 | Number 1 | January 1988 | Pages 161-172
Technical Paper | Advanced Light Water Reactor / Fission Reactor | doi.org/10.13182/NT88-A35556
Articles are hosted by Taylor and Francis Online.
To investigate the potential of the austenitic 15Cr-15Ni steel DIN Material No. 1.4970 as fuel cladding material for an advanced pressurized water reactor (APWR), rod and tube samples were mechanically tested under inert and oxidizing conditions by uniaxial loading and internal pressure up to 1200°C, to receive recent information about its safety potential under emergency cooling conditions. Uniaxial strength values are not influenced by test atmosphere. The total strain is quite low up to 950°C and increases sharply above this temperature to a maximum of ∼80% at 1100°C. The uniaxial creep strength shows a transition to more pronounced temperature and time dependence at 800°C, which is due to recrystallization. Creep rupture strain, which remains around 20% below 950°C, rises above that temperature to a level of 80 to 90%. Steam oxidation slightly decreases burst creep strength, mainly due to metal consumption, and markedly decreases the circumferential strain, especially due to the pronounced tendency to localized deformation at cracks through the defective oxide scale. Even then the circumferential strain of steel tubes is not small enough to meet reactor safety considerations with respect to the emergency cooling of a densely packed APWR core.
