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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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Fermi America looks to go public as NRC accepts COLA for AP1000s
Texas Tech University and Fermi America are now one step closer to realizing their massive vision for the Advanced Energy and Intelligence Campus in Amarillo, Texas, as the Nuclear Regulatory Commission has accepted the first two parts of its combined license application (COLA) for four Westinghouse AP1000s.
Niranjan Gudibande, Kannan Iyer
Nuclear Technology | Volume 196 | Number 3 | December 2016 | Pages 674-683
Technical Paper | doi.org/10.13182/NT16-40
Articles are hosted by Taylor and Francis Online.
Radioactive materials are transported in hollow steel casks filled with lead. The lead in these casks can melt in an accidental fire during transportation leading to an increase in its volume. This plastically deforms the steel shell housing the lead. When the cask subsequently cools after the fire is extinguished, voids will form in the solidified lead. This work deals with the simulation of solidification with void formation in these transportation casks. In these simulations, one has to deal with solid-liquid and void-material interfaces. Solid-liquid movement during solidification is treated using a modified enthalpy method. The void that is formed in the solidified lead is assumed to be a vacuum. Consistent with this assumption, the boundary conditions of zero pressure and zero stress are imposed on the interface. The growth of the void is handled using the volume of fluid method. The methodology is first benchmarked by comparing the simulations with some experimental results available in the literature. Simulations are then performed for solidification in the transportation cask to study the effect of orientation on the void formation. A methodology is then developed to quantify the overall shielding effectiveness of the cask in terms of the total amount of radiation leaked.