Radiation-induced gaseous admixture oxidation in the droplet phase |
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| Institution: | 1. Department of Nuclear Engineering and Management, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan;2. Nuclear Professional School, The University of Tokyo, 2-22 Shirakata, Tokai-mura, Ibaraki, 319-1188, Japan;3. Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSN-RES, SCA, 91192, Gif-sur-Yvette, France;1. School of Nuclear Science and Technology, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;2. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an, Shaanxi, 710049, China;1. College of Science, China Three Gorges University, No. 8, Daxue Road, Yichang 443002, China;2. College of Mechanical and Power Engineering, China Three Gorges University, No. 8, Daxue Road, Yichang 443002, China;3. China Nuclear Power Operation Technology Corporation, LTD, Wuhan of Hubei Prov, China |
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| Abstract: | The theoretical estimations of the possibility of gaseous admixture removal processes by radiation-induced chemical reactions in water aerosols were made. The ranges of droplet size (R) and dose rate in liquid phase (I) for admixture removal in kinetic regime were estimated. The experiments for SO2 and NO removal by E-beam irradiation of air with aerosol droplets in a one-pass flow system have been carried out (P=1 atm, T=285–340 K). The dependencies of the impurities removal efficiencies on aerosol volume fraction (L), T and dose rates have been obtained. At R=10–100 μm, L⩾10-4, I⩽10 kGy s-1 the extreme removal rates for SO2≈103 ppm s-1 and for NO=100–200 ppm s-1 were achieved. For initial SO2 content ≅1000 ppm and NO≅300 ppm the removal efficiency of 90–95% was achieved at dose 5–10 kGy and L=2−3×10-4. |
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