抄録
As revealed by Fukushima Daiichi nuclear disaster, countermeasures against severe accident in nuclear power plants are an urgent need. In particular, from the view point of protecting containment and suppressing the diffusion of radioactive materials, it is most important to develop the device which allows filtered venting of contaminated high pressure gas. In the filtered venting system that used in European reactors, so called venture scrubbers are used to realize filtered venting without any power supply. However, mechanism of venturi scrubber including effects of gas flow rate and shape of venturi tube is understood insufficiently in the previous study In the present study, to understand flow behavior in ventun scrubber and mechanisms of scrubbing by venturi tube, both experiment and numerical simulation are being performed. In this paper, by air-water experiment under atmospheric condition, self-priming of liquid and behavior of droplet generation m venturi tube were observed by high-speed camera.
