連載講座—事例から学ぶ燃焼物理Ⅰ
福島第一原子力発電所原子炉建屋の爆発現象の画像解析による検討
2012 年 54 巻 167 号 p. 28-32
詳細
2012 年 54 巻 167 号 p. 28-32
Explosions of reactor buildings were recorded by a TV crew monitoring Fukushima-Daiichi Nuclear Power Plant after the large earth quake on March 11, 2011. Two series of images are analyzed with image processing. X-t diagrams constructed from these images are used to estimate the velocities of moving objects. The spatial length are determined from the heights of buildings in these images. The time interval of images is also determined from the video frame rate. Based on the obtained velocities, the flame propagation velocities, decompression wave velocity, and fragment initial velocities are estimated. The overpressures of two explosions are estimated based on the fragment initial velocities. The obtained flame propagation velocities are lower than the speed of sound. The estimated overpressures are 27 kPa for Unit 1, and 149 kPa and 193 kPa for Unit 3.
