Development and Field Practical Performance of Smart Array Probe
前田 功太郎 Kotaro MAEDA 下根 純理 Junri SHIMONE 赤川 純一 Junichi AKAGAWA 永田 泰章 Yasuyuki NAGATA 原田 豊 Yutaka HARADA 瀬良 健彦 Takehiko SERA 平野 伸朗 Shinro HIRANO
Array ProbeEddy Current TestingJEAG4208Nondestructive TestingSteam GeneratorStress Corrosion CrackingTransmit-Receive Type Probe
In 1999, NEL developed the transmit-receive type ECT array probe for steam generator (SG) tubing, called “X-probe”, in cooperation with foreign firms. Recently NEL has developed the advanced ECT array probe, “Smart Array Probe”, characterized with a significantly improved resolution for circumferential cracks. The doubled channels in the circumferential mode have greatly improved the circumferential resolution of Smart Array Probe. With all the circumferential mode channels on the same circle, there is no need for axial position correction of inspection data. This report describes both the field practical performance and the compliance assessment to a Japanese SG-ECT guideline “JEAG4208” of Smart Array ECT System, composed of Smart Array Probe, pusher-in-tester “OMNI-200”, and NEL’s ECT Analysis System.