[2K05-08] Accelerator & Beam Application 1

[2K08] Highway PC Bridge Inspection using 950keV/3.95MeV Portable X-ray/Neutron Source

*Jian Yang¹, Mitsuru Uesaka¹, Yuki Mitsuya¹, Katsuhiro Dobashi¹, Joichi Kusano², Yoshiyuki Iizuka³ (1. UTokyo, 2. Accuthera, 3. ATOX)

Keywords:X-ray, Nondestructive test, Linear Accelerator, Bridge Inspection, Structural Analysis

The 950keV and 3.95MeV portable LINAC-based X-Ray source is applied to cut-samples from a particular highway PC bridge in Japan. The advanced flat-panel detector adopts a longer data stacking time. For the first time, the inner structure of the 570mm-thick PC concrete, which is the typical thickness for highway PC bridges, is successfully visualized. The use of X-ray mesh collimators reduces soft X-ray scattering noises, which improves the X-ray image quality. Grout-filling flaws inside the PC sheath could be confirmed through the visualization as well. The guideline was proposed to a real PC bridge and maintenance could be applied based on the inspection result, and the thickness of the concrete and the rod diameters were also calculated.