ALIGNMENT METHOD AND APPARATUS FOR NUCLEAR REACTOR HEAD BOLT HOLE

摘要

PURPOSE: An alignment method for nuclear reactor head bolt holes and an apparatus thereof are provided to enable a worker to align bolt holes provided at a nuclear reactor head while checking the alignment with own eyes using a laser beam not needing to go down to the bottom of a cavity, thereby preventing safety accidents. CONSTITUTION: An alignment apparatus comprises a body(2) which is mounted in a bolt hole of a head at the top of a nuclear reactor; a laser beam generator holder(3) which is combined to the center of the body; and a laser beam generator(4) which is combined at the laser beam generator holder. A protrusion(20) of the body is combined in the bolt hole of the head. The laser beam generator holder is mounted in a screw hole(24) at the center of the body.