| Abstract |
| The severe accident of Tokyo Electric Power’s Fukushima Dai-ichi Nuclear Power Plant occurred on 11th, March 2011. This accident released a significant quantity of radionuclides into the environment and three of the plant's six reactors suffered core meltdowns. For a practical revitalization of the disaster countries suffered from radioactivity, some academic approach will take an important role in innovative decommission with a practical science back grounded by academic. From the viewpoint, we have been establishing a new academic field called "Revitalizics". Related with robot measurement engineering in “Revitalizics”, in this research, we propose to use ultrasonic sensor to measure the flow field in the reactor and to map out the location of the fuel debris in the reactor. We will explore a method known as the Ultrasonic Velocity Profiler which can measure fluid velocity profiles and also explore advanced ultrasonic array imaging, Aperture Synthesis method, to inspect the shape and state of the fuel debris. For decommissioning purpose, we designed a robot manipulation system for the ultrasonic sensor transportation considering the condition inside the reactor such as high radiation environment. In addition, we have designed and build lab-based replicas of the immersed regions of the reactor. This apparatus was used to test the ultrasonic measurements and their robotic system. |
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| Biographical Sketch |
| Dr. Hiroshige Kikura is currently Associate Professor of Laboratory for Advanced Nuclear Energy at Tokyo Institute of Technology in Japan. Prior to joining at Tokyo Institute of Technology 1999, he worked at LSTM, University Erlangen-Nuremberg, Germany and Paul Scherrer Institute (PSI), Switzerland, from 1993 - 1999. His researches are on nuclear safety, thermal hydrodynamics, process instrumentation, transportation of radioactive materials, vitrified waste storage, deep geological repository, solar energy system, solar power system, robotic measurement, revitalizics. He has authored or co-authored more than 900 publications (124 technical journals, 4 books, 370 international conferences, 410 national conferences), has 20 patents. He is a member or a chair in several committees at the Japan Society of Mechanical Engineers (JSME), Atomic Energy Society of Japan (AESJ), the Visualization Society of Japan (VSJ), the Japan Society for Multiphase Flow (JSMF), and so on. In addition, he is engaged in an editor board member of several journals. |
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