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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Update on Zaporizhzhia
Repairs have reportedly started to restore off-site power to Ukraine’s Zaporizhzhia nuclear power plant. About a month ago, the site lost connection to the grid for the 10th time during the Russia-Ukraine military conflict, according to Rafael Mariano Grossi, director general of the International Atomic Energy Agency.
Robert Zboray, Wilhelmus J. M. de Kruijf, Tim H. J. J. van der Hagen, Rizwan-uddin
Nuclear Technology | Volume 146 | Number 3 | June 2004 | Pages 244-256
Technical Paper | Thermal Hydraulics | doi.org/10.13182/NT04-A3503
Articles are hosted by Taylor and Francis Online.
The nonlinear dynamics of natural-circulation, boiling two-phase flows are investigated using a two-phase flow loop. Experiments have been carried out in the unstable operating region of the facility for various system pressures and for different frictions at the exit of the riser section. It appears that the boiling two-phase flow undergoes the well-known Feigenbaum scenario, the period-doubling route toward chaotic behavior. Evaluation of the recorded signals using nonlinear time series analysis methods indicates the occurrence of chaotic density-wave oscillations.