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- Title
ヒドラジン水和物の濃度拡散挙動の観察.
- Authors
滝口広樹; 古谷正裕; 新井崇洋
- Abstract
Highly accurate measurement of thermal properties, reaction rates and mass transiers is necessary to grasp thermal flow characteristics of nuclear reactor plant because these properties are unsteadily sensitive to concentration, temperature, pressure and scale. On the real scale of the plant, however, there are problems such as the complexity of three-dimensional flow and the effect of convection. In this study, a novel technology that measures mass transfer and reaction rate of nuclear application material with high accuracy and high speed by applying microchannel which makes one-dimensional laminar flow, has developed. In this paper, a micro flow control system that can adjust flow with a minimum volume of 1µL/min. by a pressurized pump, was fabricated. In order to observe concentration diffusion of the flow field in real time, a near infrared spectroscopic visible observation device was developed and combined with the flow system. The mutual diffusion coefficient was measured for hydrazine hydrate, which is added for the purpose of preventing corrosion of secondary piping in nuclear power plant. It revealed that the absorption depends on the concentration near 1555 nm for Fourier transform near-infrared spectrophotometer. The diffusion coefficients of 5,10 and 20 wt% for hydrazine hydrate were quantified with the luminance profiles in the absorption peak wavelength.
- Publication
Japanese Journal of Multiphase Flow, 2019, Vol 33, Issue 1, p71
- ISSN
0914-2843
- Publication type
Article