中性子束計測ハウジング向け渦電流探傷検証試験
概要
We verified that the eddy current testing (ECT) has the enough detectability for defects on the heat affected zone (HAZ) in welding of in-core monitor (ICM) housing inner surfaces for a special inspection involved in long-term operation. It is presumed that a detectability of ECT is decreased because a HAZ of ICM housing inner surfaces is deformed by welding. We conducted full-scale defect detection tests using the simulated ICM housing specimen with the welded part, the rotational ECT probe and the probe moving equipment and confirmed that the ECT detected defects of 0.5 mm in depth despite the existence of inner surface deformations.
