Method and device for testing an annular weld of a main coolant line connected to a reactor pressure vessel of a nuclear power plant

摘要

In a method and a device for testing an annular weld seam (10) of a main coolant line (4) connected to a reactor pressure vessel (2) of a nuclear power plant, a self-propelled submersible vehicle (12) is introduced into the open and flooded reactor pressure vessel (2) contains the inner peripheral surface of the main coolant line (4) and adjustable in the circumferential direction movable test device (20). The submersible vehicle (12) is retracted into the likewise flooded main coolant line (4) and fixed by radially extendable spreader arms (16) in the region of the weld seam (10). Subsequently, the test device (20) is set to weld (10) and moved along the weld (10) in the circumferential direction.