Development of Fuel Debris Inspection Methods using Air-Coupled Ultrasound

Japan has decided to start fuel debris removal on 2021. Therefore, before starting retrieval of the fuel debris, investigation of location, shape, and also properties of fuel debris have to be performed. In this study, air-coupled ultrasound technique had been developed in order to visualize of fuel...

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Bibliographic Details
Published in:E3S web of conferences 2018-01, Vol.42, p.1015
Main Authors: Hamdani, Ari, Kikura, Hiroshige, Kimura, Shun, Tsukada, Keisuke, Sasa, Daisuku, Oomori, Shuichi
Format: Article
Language:English
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Summary:Japan has decided to start fuel debris removal on 2021. Therefore, before starting retrieval of the fuel debris, investigation of location, shape, and also properties of fuel debris have to be performed. In this study, air-coupled ultrasound technique had been developed in order to visualize of fuel debris. Firstly, simulated fuel debris was represented by stone and experiment was done in laboratory scale. Flat and focused air-coupled ultrasound were used as a sensor to get echo signals of the target surface. Results showed that both flat and focused sensor successfully reconstructed the flat surface image in good spatial resolution. However, flat air-coupled transducer shown unstructured. On the other hand, focused air-coupled ultrasound shown good performance when target surface was unstructured. Therefore, it was recommended to used focused sensor when target surface was unstructured like simulated fuel debris.
ISSN:2267-1242
2267-1242
DOI:10.1051/e3sconf/20184201015