Automatic flaw detector for welded joint of reactor pressure vessel

摘要

(57) [Abstract] [Purpose] An object is to provide an automatic flaw detector for a weld joint of a reactor pressure vessel, which is capable of easily performing flaw detection in a narrow working space in an inclined portion of a support leg or the like. A reactor pressure vessel 1 having a welded joint portion 3 along the circumferential direction at or near an inclined portion 2 of a support leg 1c or the like, and a travel provided outside the welded joint portion 3 so as to surround it. A road 6, a traveling vehicle 7 traveling along the traveling path 6, an inclination of the traveling vehicle 7 along the inclined portion 2 orthogonal to the welded joint portion 3, and movable in the inclination direction. It is characterized in that it is provided with an arm 8 provided in the above and a probe 9 that is provided so as to be movable along the arm 8 and performs flaw detection of the weld joint portion 3.