DIFFUSIOPHORESIS OF FISSION PRODUCT AEROSOL IN AN LWR CONTAINMENT AFTER CORE MELTDOWN
Diffusiophoresis is shown to be one of the important fission product aerosol removal processes from the warm, humid atmosphere of the LWR containment under post- meltdown conditions. A critical literature review of the theoretical and the experimental research on diffusiophoresis is given. It is concluded that for large aerosol particles diffusiophoresis most likely is diffusion-slip modified Stefan flow conditioned. Experimental data on diffusiophoresis are of a limited nature both qualitatively and quantitatively. A number of experiments under relevant conditions of diffusiophoresis and thermophoresis for large particles are presented. Good agreement with diffusion-slip modified Stefan flow conditioned diffusiophoresis is obtained. The theories by Stetter (pure Stefan flow i.e. mean molar velocity) and Whitmore and Meisen (mean mass velocity) are shown to yield upper and lower limits respectively for the particle deposition velocities by diffusiophoresis.
Bibliographic Reference: EUR 11376 EN (1987) MF, PP 39, ECU 4.00, BLOW-UP COPY, ECU 4.50, AVAILABILITY: EUROFFICE, LUXEMBOURG, BP 1003, GDL
Availability: Can be ordered online
Record Number: 1989126083800 / Last updated on: 1989-05-01
Available languages: en