Result of UT verification test for Stainless Steel through weld deposit
永田 義昭 Yoshiaki NAGATA 長谷川 勝広 Katsuhiro HASEGAWA 久米田 正邦 Masakuni KUMEDA 稲垣 哲彦 Tetsuhiko INAGAKI 中田 親秀 Chikahide NAKADA 太田 隆 Takashi OHTA 田口 豊信 Toyonobu TAGUCHI 米谷 豊 Yutaka KOMETANI 清水 康 Yasushi SHIMIZU 三橋 忠浩 Tadahiro MITSUHASHI 東海林 一 Hajime SHOHJI 山口 篤憲 Atsunori YAMAGUCHI 杉林 卓也 Takuya SUGIBAYASHI 小林 輝男 Teruo KOBAYASHI
Phased array UTStainless steelStress Corrosion CrackingUltrasonic Testing
BWR owners and plant fabricators have been making efforts to decrease the ISI parts where UT is difficult to be conducted. For that purpose, UT verification test for both detection and sizing qualification through deposit of pipe weld joint started in 2009 and will last until 2011. In 2009, UT verification test for stainless steel pipe weld joint has been performed. Test samples are stainless steel pipes with welds and sizes are 600A.350A.150A with EDM notches and/or SCC cracks. Angle beam methods and phased-array angle beam methods have been applied. The detection test shows that there are no failure to detect and no false call. The length sizing test shows that RMS errors of SCC crack length are within the ASME acceptance criteria. So, it is clarified that each method has the enough qualification for UT through deposit of stainless steel pipe weld joint. These tests have been witnessed and evaluated by JAPEIC as the third body.