Nuclear reactor decommissioning system

Patent metadata

Field	Value
Publication number	US-2021183531-A1
Application number	US-201917257360-A
Country	US
Kind code	A1
Filing date	Jul 3, 2019
Priority date	Jul 6, 2018
Publication date	Jun 17, 2021
Grant date	—

Abstract

A nuclear reactor decommissioning system according to an embodiment includes a cutting device to cut a reactor, a lifting device inserted inside the reactor to lift the reactor, and a shielding device that is positioned between the reactor and the lifting device and blocks radioactive dust generated by the cutting device from spreading.

First claim

1 . A nuclear reactor decommissioning system, comprising
a cutting device to cut a reactor, a lifting device inserted inside the reactor to lift the reactor, and a shielding device that is positioned between the reactor and the lifting device and blocks radioactive dust generated by the cutting device from spreading.

2 . The nuclear reactor decommissioning system of claim 1 , wherein
the lifting device includes a coupling member coupled to the reactor, and an elevating device that is connected to the coupling member and elevates the reactor, and the shielding device includes a shielding tube including a plurality of cylindrical members of different diameters surrounding the elevating device, and a shielding plate positioned on an upper portion of the shielding tube and blocking the reactor from the outside.

3 . The nuclear reactor decommissioning system of claim 2 , wherein
the plurality of cylindrical members have a larger diameter as a distance from the elevating device increases, and respective end portions of the cylindrical member have catching projections to be caught by respective end portions of adjacent cylindrical members.

4 . The nuclear reactor decommissioning system of claim 3 , wherein
the catching projection includes an outer catching projection extending from the cylindrical member to the outside, and an inner catching projection extending from the cylindrical member to the inside.

5 . The nuclear reactor decommissioning system of claim 3 , wherein
when the reactor is lifted by the lifting device, at least some of the cylindrical members of the shielding tube are lifted together.

6 . The nuclear reactor decommissioning system of claim 2 , wherein
the shielding plate includes a plurality of ventilation parts positioned between the reactor and the outermost cylindrical member of the shielding tube.

7 . The nuclear reactor decommissioning system of claim 2 , wherein
the plurality of ventilation parts are formed along an edge of the shielding plate.

8 . The nuclear reactor decommissioning system of claim 2 , further comprising
a dust collecting device connected to the plurality of ventilation parts to collect the radioactive dust.

Assignees

• Korea Hydro & Nuclear Power Co

Inventors

• Hwang Young Hwan
• Lee Mi-Hyun
• Yoon Ju-Young
• Kim Cheon-Woo

Classifications

• G21C1/086

  Pressurised water reactors · CPC title

• G21D1/003 Primary

  Nuclear facilities decommissioning arrangements (decontamination arrangements, treating radioactively contaminated material G21F9/00) · CPC title

• Y02E30/30

  Nuclear fission reactors · CPC title

• G21F7/06

  Structural combination with remotely-controlled apparatus, e.g. with manipulators · CPC title

• Y02E30/00

  Energy generation of nuclear origin · CPC title