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Generation III+nuclear power plants,especially those with capacity over 1100 MWe,implement considerably larger forged components than previous plant designs.The manufacturing process requires new non-destructive inspection techniques to ensure the quality of these critical parts.Indeed,due to the long sound paths,conventional ultrasonic(UT)techniques cannot provide adequate detectability of the reference reflectors required by the existing codes.Also,some standards require multiple angle beams to be applied in addition to the straight beam inspection,and this leads to long inspection times.The innovative concept of a semi-flexible 2D array probe has been introduced to overcome the limitations of conventional UT techniques.The performance of this new probe type has been extensively validated on representative test specimens.Also,dedicated software tools have been developed to facilitate the generation and use of DGS sizing diagrams for a wide range of conventional and phased array probes,including semi-flexible 2D array probes.The tools help heavy forging manufacturers to demonstrate compliance with existing codes based on the Equivalent Reflector Size(ERS)evaluation method.This paper addresses the implementation and validation of this new inspection solution for large rotor forgings.Software simulations,as well as detectability measurements and data acquisitions on representative test specimens will be presented,and compared with conventional UT performance.Various aspects of the hardware and software specification will be addressed,as well as the potential reduction of the total inspection time.