| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for setting a reference line for use in accurately and stably fixing a vibration-preventing bar in a short time. <P>SOLUTION: An intersection point of a tube plate 5 disposed at an end 2a of a body 2 of a steam generator and a normal 2x on the surface of the tube plate 5 represents the origin point of a coordinate system. A method includes the step of setting at least three reference points 50 around the normal 2x at positions closer to the other end 2b of the body 2 than the origin point, and measuring the coordinates of the reference points 50 in the coordinate system; the step of defining the coordinates of the points on the normal 2x positioned at the other end 2b based on the coordinates of the reference points 50 for setting a reference line which overlaps the coordinates and is orthogonal to the normal 2x, and calculating the coordinates of the two points which overlap the reference line; and the step of causing laser light passing through the coordinates of the two points to be emitted. <P>COPYRIGHT: (C)2012,JPO&INPIT |
