| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for shortening operations of replacement of control rods, replacement of nuclear instrumentation, inspections in a shared period, and installation and removal of a nozzle plug, which are critical constructions in a periodic inspection of a boiling water type nuclear power plant since it is desired to shorten a period of the periodic inspection in order to raise facility use rate of the nuclear power plant. <P>SOLUTION: In operations of replacement of control rods, replacement of nuclear instrumentation, inspections in a shared period, and installation and removal of a nozzle plug of a nuclear power plant, operation time is shortened by simultaneously executing underwater operations in a nuclear reactor at three or more parts by using boxes for operations, additionally installing platforms to operate in the XY direction to a fuel assembly handling device or a temporary trestle, etc. <P>COPYRIGHT: (C)2012,JPO&INPIT |
