Development of Fuel Debris Inspection Methods using Air-Coupled UltrasoundAri Hamdani, Hiroshige Kikura, Shun Kimura, Keisuke Tsukada, Daisuku Sasa and Shuichi OomoriE3S Web Conf., 42 (2018) 01015DOI: https://doi.org/10.1051/e3sconf/20184201015