Pei, CuixiangLiu, HaochenQiu, JinxingLiu, TianhaoChen, Zhenmao2019-11-142019-11-142019-06-24Pei C, Liu H, Qiu J, et al., (2019) Progress on the ultrasonic testing and laser thermography techniques for NDT of tokamak plasma-facing components. Theoretical and Applied Mechanics Letters, Volume 9, Issue 3, May 2019, pp. 180-1872095-0349https://doi.org/10.1016/j.taml.2019.03.011https://dspace.lib.cranfield.ac.uk/handle/1826/14731During manufacturing and operation, different kinds of defects, e.g., delamination or surface cracks, may be generated in the plasma-facing components (PFCs) of a Tokamak device. To ensure the safety of the PFCs, various kinds of nondestructive testing (NDT) techniques are needed for different defect and failure mode. This paper gives a review of the recently developed ultrasonic testing (UT) and laser thermography methods for inspection of the delamination and surface cracks in PFCs. For monoblock W/Cu PFCs of divertor, the bonding quality at both W-Cu and Cu-CuCrZr interfaces was qualified by using UT with a focus probe during manufacturing. A noncontact, coupling-free and flexible ultrasonic scanning testing system with use of an electromagnetic acoustic transducer and a robotic inspection manipulator was introduced then for the in-vessel inspection of delamination defect in first wall (FW). A laser infrared thermography testing method is highlighted for the on-line inspection of delamination defect in FW through the vacuum vessel window of the Tokamak reactor. Finally, a new laser spot thermography method using laser spot array source was described for the online inspection of the surface cracks in FW.enAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Plasma-facing componentPlasma-facing componentsUltrasonic testingLaser thermographyDelaminationSurface crackArticle