Diffusiophoretic and thermophoretic deposition of aerosols on surfaces in Light Water Reactor containments following severely degraded core accidents: Chapter 11

The diffusiophoretic deposition of aerosols on surfaces in Light Water Reactor containments following severely degraded core accidents can be calculated directly from the steam condensation rates obtained from thermal hydraulics analysis. This approach circumvents the difficulty of finding suitable diffusiophoretic boundary layer thicknesses and give approximate ranges of the boundary layer thickness to use when the steam condensation rates are not available. Examples are provided for a TMLB' accident sequence. For this accident sequence, the deposition of aerosols on surfaces due to thermophoresis is shown to be much smaller than that due to diffusiophoresis