POSITIONING METHOD AND POSITIONING DEVICE FOR STRUCTURE IN REACTOR

PROBLEM TO BE SOLVED: To provide a positioning method and a positioning device for a structure in a reactor, protecting a worker from exposure and also positioning a structure in a reactor in a reactor vessel with designated installation accuracy in suspending the structure in the reactor in the reactor vessel. SOLUTION: According to the positioning method for the structure 4 in the reactor, in inserting the structure 4 in the reactor in the reactor vessel 1, first misalignment of the cores of the outline circle of the structure 4 in the reactor and the outline circle of the reactor vessel 1 is detected. According to the detection result, the structure 4 in the reactor is displaced in the horizontal direction to correct the core misalignment. It is confirmed whether or not there is misalignment of the cores of the outline circle of the structure 4 in the reactor and the outline circle of the reactor vessel 1 after correction. COPYRIGHT: (C)2004,JPO&NCIPI