Installation device of reactor repair device and method

Patent metadata

Field	Value
Publication number	US-10134494-B2
Application number	US-201414762562-A
Country	US
Kind code	B2
Filing date	Jan 27, 2014
Priority date	Jan 31, 2013
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

In an installation device of a reactor repair device and a method, an installation pole (111) connected with an upper portion of a water jet peening device (101), a lifting device (112) that can suspend and support an upper portion of the installation pole (111) and can lift the installation pole (111) from a work floor (121), a moving device (113) that can move the lifting device (112) in two directions intersecting in a horizontal direction, and a position adjustment device (114) that can move the installation pole (111) in the horizontal direction in a state where the installation pole (111) is supported by the lifting device (112).

First claim

The invention claimed is:

1. A method of installing a reactor repair device to an instrumentation nozzle provided in a hemispherical portion of a reactor vessel, the method comprising the steps of:
suspending and supporting an upper portion of an installation jig connected to an upper portion of the reactor repair device from a work floor;
performing temporary positioning of the reactor repair device with respect to the instrumentation nozzle by moving the installation jig in a first and a second direction intersecting in a horizontal plane;
performing actual positioning of the reactor repair device with respect to the instrumentation nozzle by moving the installation jig in the second direction; and
mounting the reactor repair device to the instrumentation nozzle by lowering the reactor repair device connected with the installation jig,
wherein the method further comprising:
(i) suspending and supporting the reactor repair device 101 connected to the installation jig 111 by a first crane 123
(ii) moving the reactor repair device 101 to a predetermined position, and
(iii) switching suspension of the installation jig 111 to a second crane 127 while keeping a load of the reactor repair device 101 connected to the installation jig 111 supported by the first crane 123 .

2. The method of installing a reactor repair device according to claim 1 , the method comprising
successively performing the actual positioning and the mounting of the reactor repair device with respect to the instrumentation nozzle by slightly moving the reactor repair device in the second direction while lowering the reactor repair device.

3. The method of installing a reactor repair device according to claim 1 wherein the step (iii) further comprising:
iv) connecting the second crane with a suspension switch metal fitting that connects the first crane with the installation jig;
v) lowering the first crane and raising the second crane; and
vi) releasing the connection between the first crane and the suspension switch metal fitting.

Assignees

• Mitsubishi Heavy Ind Ltd

Inventors

• Minamiyama Akio
• Nishitsuji Yutaka
• Okimura Koji
• Hinami Kazuyuki
• Hamamoto Tomochika
• Konno Takao

Classifications

• G21C13/036

  the tube passing through the vessel wall, i.e. continuing on both sides of the wall · CPC title

• G21C19/02

  Details of handling arrangements · CPC title

• G21C17/01

  Inspection of the inner surfaces of vessels · CPC title

• Y10T29/49719

  Seal or element thereof · CPC title

• G21C19/207 Primary

  Assembling, maintenance or repair of reactor components (G21C3/334 takes precedence) · CPC title