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Sasaki, Kota*; Yusa, Noritaka*; Wakai, Takashi; Hashizume, Hidetoshi*
Electromagnetic Nondestructive Evaluation (XVIII), p.244 - 251, 2015/06
Times Cited Count:0 Percentile:0.05Sasaki, Kota*; Yusa, Noritaka*; Wakai, Takashi; Hashizume, Hidetoshi*
Hozengaku, 12(1), p.81 - 86, 2013/04
This study reports the development of a new microwave probe for the nondestructive testing of a pipe. Three-dimensional finite element simulations are carried out to optimize the profile of a microwave probe, whose results show that a probe with elliptic profile enables smaller reflection at the probes as well as much better single-mode propagation inside the pipe than conventional ones. Experimental validations are carried out using a straight brass pipe with an inner diameter of 39 mm and a total length of 2 m. The results of the experiments clearly demonstrate that the new microwave probe provides clearer signals due to simulated rectangular wall thinning.
Sasaki, Kota*; Liu, L.*; Yusa, Noritaka*; Wakai, Takashi; Hashizume, Hidetoshi*
Proceedings of 1st International Conference on Maintenance Science and Technology for Nuclear Power Plants (ICMST-Tokyo 2012) (CD-ROM), 2 Pages, 2012/11
Sato, Tsukasa*; Ebara, Shinji*; Hashizume, Hidetoshi*; Yusa, Noritaka*; Yuki, Kazuhisa*; Aizawa, Kosuke; Yamano, Hidemasa
no journal, ,
To clarify a flow pattern in a multiple elbow pipe of cold-leg in sodium-cooled fast reactor, the 1/7 scale flow experiment was performed as the first step to measure the flow velocity distribution in a single elbow pipe under Re=110 by using the PIV technique.
Sasaki, Kota*; Yusa, Noritaka*; Hashizume, Hidetoshi*; Wakai, Takashi
no journal, ,
This study reports applicability evaluations of microwave inspection technique for cracks on inner wall of metal pipes. The experiment is carried out using the straight brass pipe with a diameter of 11.0 mm and the total length of 18.5 m and artificial slits simulating cracks. Experimental result shows significantly large reflections from the slit compared with no flaw, thereby confirming the detectability of this method for cracks in a metal pipes.