Experimental investigation of heat and mass transfers in a spray inside the TOSQAN facility for nuclear reactor containment safety
Emmanuel PORCHERON, Pascal LEMAITRE, Amandine NUBOER, Vincent ROCHAS, Jacques VENDEL - ICLASS-10 (International Conference on Liquid Atomization and Spray Systems), 27th august 2006 – 1st september 2006, Kyoto, Japan
TOSQAN is an experimental program undertaken by the Institut de Radioprotection et de Sûreté Nucléaire (IRSN) in order to perform thermal hydraulic containment studies. The TOSQAN facility is a large enclosure devoted to simulate typical accidental thermal hydraulic flow conditions in nuclear Pressurized Water Reactor (PWR) containment. The TOSQAN facility which is highly instrumented with non-intrusive optical diagnostics is particularly adapted to nuclear safety CFD code validation. The present work is devoted to studying the interaction of a water spray injection used as a mitigation mean to reduce containment pressure and to produce a mixing of air, steam and hydrogen induced by spray entrainment and condensation on droplet. In order to have a better understanding of heat and mass transfers between spray droplets and gases mixture, and to analyze mixing effects due to spray activation, we perform detailed characterization of the two phases flow.