Confinement barrier efficiency of a gloves box in accidental operating conditions.
C. Prévost*, J. Lacan, 19th Congrès Français sur les aérosols, 10-11 décember 2003, Paris.
The purpose of the study carried out at the Institut de Radioprotection et de Sûreté Nucléaire (IRSN) consists in quantifying both the intensity and the kinetics of polluting agents propagation phenomenon when a gloves box is used under incident condition that is in this particular case, the breakage of static confinement by a sudden breakdown of a glove or a bag. In nuclear industry, the operator protection is normally assumed by the dynamic confinement technique. The present paper concerns applications of gas and aerosol tracers in order to determine coefficients of back dissemination of a polluting agent in many different configurations; optical techniques (PIV and LDA) are applied too: these non intrusive investigation methods allow to understand the air flow structure and behaviour near the opening. Finally, the results highlight the presence of a significant back dissemination of a polluting agent whatever is his nature; we do not demonstrate influence marked with the nature of the tracer used.