In the aerosol removal efficiency test of filtered containment venting system, the aerosol generator is used to produce the aerosols delivered to the main pipe of the filtered containment venting system under a system pressure of 1 to 6.5 MPa. The main ingredient of the aerosols is barium sulphate or titanium dioxide, with a mass median diameter of 1 micron and a geometric standard size distribution of 1~2; the concentration of the used aerosols should be held within a range of 50~900 mg/m³. Since existing generators are usually unable to generate and disperse the cohesive powders and unable to work in such a high pressure, a new kind of aerosol generator is designed, which can not only meet the requirements for the used aerosols but also realize the function of continuously providing powders in high pressure situation. Through experiments, it is shown that the relative error of the value of aerosols generated and transmitted by the new generator is less than 15%, and it can satisfy the requirement of the research.

severe accidents  /  filtered containment venting system  /  aerosols  /  aerosol generators