A prototype probe system with a hybrid optical fiber scope was designed for inspecting and repairing heat exchanger tubes in fast breeder reactors (FBRs). It comprises a laser processing head combined with an eddy current testing unit. Ultrashort laser pulse ablation is used to remove workhardened layers. And spot laser welding is used to repair cracks. This system is both a safe and economical option for the maintenance of FBRs ...
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