[15p-K508-1~19] 3.2 Information photonics and image engineering

3:30 PM - 3:45 PM JST(6:30 AM - 6:45 AM UTC)

[15p-K508-10] Crack visibility enhancement of remote visual testing on pressure vessels of nuclear reactors by balanced bright and dark field illumination

〇Takeshi Shimano¹, Takaaki Konishi¹, Jyunichiro Naganuma², Yoshiaki Nagashima² (1.Hitachi R&D, 2.Hitachi-GE N.E.)

Keywords:

VT inspection camera for nuclear reactors,balanced bright and dark field illumination

Remote visual testing (VT) is one of the important inspection items on pressure vessels of nuclear reactors. We propose balanced bright and dark field illumination to suppress the contrast of boundaries of scattering and mirror small regions to enhance the crack images to be inspected.