Comparison of ultrasonic testing standards for welding seams in fusion reactors

The pre-service and in-service NDT of ITER and CFETR fusion devices shall be performed in according with RCC-MR-2007 SECTION 3 and NB/T 47013-2015, respectively. In this paper, conventional ultrasonic testing of butt joint welds in RCC-MR-2007 and NB/T 47013-2015 is compared from the aspects of applicable scope, surface preparation, probe parameter, calibration and reference block, scanning method, characterization of indications, so as to provide reference for designers to understand the corresponding standards and design optimization.