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- W4299805087 abstract "• Experiments and modeling of Integral pressurized water reactor (iPWR) accidents. • “Loss of containment isolation” severe accident simulated in MELCOR. • Experiments on containment thermal stratification and aerosol deposition behavior. • Diffusiophoresis primary fission product deposition mechanism. • Total deposition rates impacted by development of steam layering. Integral pressurized water reactor (iPWR) designs employing submerged, high-pressure steel containment vessels rely on water in the outer operating pool as the primary heat sink during an accident. This drives very strong steam condensation, and along with it, strong diffusiophoretic deposition rates for fission product aerosols. In this study, a loss-of-containment isolation accident is proposed and simulated with MELCOR, where the strong condensation/diffusiophoresis is the last barrier preventing direct radionuclide releases to the environment. This is supported by experiments that measured the thermal stratification, steam condensation rates, and aerosol deposition rates that would be experienced in a prototypic, iPWR-like geometry. The development of the steam layer, whose thickness was proportional to steam injection rates, impacted the aerosol deposition by limiting the area over which condensation-driven diffusiophoresis could occur. Diffusiophoresis was still confirmed to be the primary mechanism for aerosol deposition, with observed rates that were in line with established theory." @default.
- W4299805087 created "2022-10-03" @default.
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- W4299805087 date "2022-11-01" @default.
- W4299805087 modified "2023-09-24" @default.
- W4299805087 title "Aerosol retention within submerged Containment-Type iPWRs: Experiments and modeling" @default.
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- W4299805087 doi "https://doi.org/10.1016/j.nucengdes.2022.111994" @default.
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