TEST SYSTEM SUPPORT FOR TESTING THE CONNECTION AREA OF PRESSURE TANK, IN PARTICULAR REACTOR PRESSURE TANK OF NUCLEAR POWER PLANTS, WITH ULTRASOUND

摘要

Test system carrier for ultrasonic testing of pressure vessels, the carrier being supported at the end of a telescopic tube for executing stroke and rotary motions in or about the axis of a nozzle, the telescopic tube being adjustably mounted on the central mast of a central-mast manipulator so as to be adjustable in elevation and rotatable about the axis of the central mast as well as about its own axis includes, in combination, an inner-periphery test-head carrier displaceable along the axis of a nozzle and radially thereto for ultrasonically testing seams formed in the nozzle and seams between pipe connections and the nozzle as well as zones adjacent thereto; a tiltable lever, test head means carried by the lever, the lever being movable so as to bring the test head means into contact with surfaces at the end of the nozzle, the corner of the nozzle and the inner periphery of the nozzle and movable in test tracks within the entire respective peripheral angle nozzle thereof; the pivot axis of the lever being shiftable axially away from the telescoping tube, and the angular position of the lever with respect to the telescoping tube being variable for contacting the respective test tracks, the lever being controllably movable into an inward folded-up seat position so that the test system carrier with the inner-periphery test-head carrier is axially displaceable unobstructedly through the nozzle.