Experimental research on aerosols collection performance of self-priming venturi scrubber in FCVS |
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| Affiliation: | 1. Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan;2. Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;1. Department of Nuclear Science and Technology, Xi''an Jiaotong University, Xi''an City 710049, China;2. Key Laboratory Advanced Reactor Engineering and Safety, Ministry of Education of China, China;1. The Japan Atomic Power Company, 1-1,Kandamitoshiro-cho, Chiyoda-ku, Tokyo 105-0004, Japan;2. Genden Information System Company, 2-4 Chiyoda-ku, Tokyo 105-0004 Japan;3. Tokyo Institute of Technology, 2-12-N1-9 Ookayama, Meguro-ku, Tokyo 152-8550, Japan;1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;2. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Insistute of China, Chengdu, China |
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| Abstract: | The self-priming venturi scrubber is the key component of filtered containment venting system to removal radioactive products during severe accident in nuclear power plant. In this paper, the collection performance of aerosols in the venturi scrubber is researched with experiment. The results indicate that the retention performance is closely related to the operating conditions and structures, and this relation is more closely for the removal of particle size under 0.5 μm. The retention efficiency in a venturi scrubber increase with improving of both gas velocity and injection flow rate, and the influence of gas velocity on efficiency is more effective at low injection flow rate. The venturi scrubber with a long throat length or small diffuser angle performs excellent retention performance for small size aerosols. In condition of gas velocity higher as Uavg = 200 m/s and the sufficient injection flow rate, the retention efficiency maintains upon 99% for the aerosol that size range from 0.1 μm to 10 μm. The pressure loss of the venturi scrubber increase slightly with extending the length of throat, and also with reducing diffuser angles. The removal efficiency is usually at the expense of the energy loss, while the higher aerosol retention efficiency corresponds to bigger pressure loss. |
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| Keywords: | Self-priming venturi scrubber Aerosols Retention performance Filtered containment venting system |
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