The influence of containment sprays on atmosphere behaviour is being investigated both experimentally and theoretically. Experiments are being performed on the TOSQAN and MISTRA experimental facilities.
The catalyst sheets (stainless steel coated with washcoat/platinum catalyst material) are arranged in parallel forming vertical rectangular flow channels. Such a set-up represents a box-type recombiner section of AREVA design.
The experiment objective was to study the physical phenomena that affect hydrogen distribution in the reactor containment such as: steam wall condensation, heat mass and momentum exchanges with the sump or with the containment spray systems.
TUBA (thermo-phoresis and diffusiophoresis) programme included experiments represented conditions expected in the SG tubes. Laminar flow was used in TUBA tests (TUBA-T: thermophoresis and TUBA-D: diffusiophoresis & thermo-diffusiophoresis).
