IN-REACTOR PIPING WORK DEVICE AND IN-REACTOR PIPING WORK METHOD

摘要

A horizontally moving stage (8, 9) is mounted on a cylindrical structure (7) within a reactor pressure vessel (1), travels horizontally along the surface of the cylindrical structure (7) by wheels, and is positioned above an in-reactor pipe (3) by the operation of the horizontally moving stage (8, 9). A hollow mast (10) is carried by the horizontally moving stage (8, 9), and is expandable and contractible in a standing position. When the mast (10) is in the standing position, a probe (13) is movable within the mast and performs work in the proximity to the inner surface of the in-reactor pipe (3). A cable (14) passes through the mast (10) to be connected to the probe (13).