Method and device for checking a welding seam present at one of the interior surfaces of a reactor pressure vessel

摘要

In a method and a device for testing a weld seam ( 8 ), located on the inner surface of a reactor pressure vessel ( 2 ), by which the outer circumference of an instrumentation nozzle ( 4 ) leading into the interior of this reactor pressure vessel ( 2 ) is welded onto the reactor pressure vessel ( 2 ), an ultrasound test probe ( 20 ) with a linear ultrasound transducer array ( 30 ) is inserted into the instrumentation nozzle ( 4 ), which ultrasound transducer array ( 30 ) is parallel to the central axis ( 12 ) of the instrumentation nozzle ( 4 ) in terms of its longitudinal direction, and is used to couple a transmitted ultrasound signal (S) into the instrumentation nozzle ( 4 ) in the region of the weld seam ( 8 ) and to receive a reflected ultrasound signal (R).