Search

KR-102964275-B1 - MODULAR CUTTING DEVICE FOR CUTTING OF LATCH ASSEMBLY OF NUCLEAR REACTOR

KR102964275B1KR 102964275 B1KR102964275 B1KR 102964275B1KR-102964275-B1

Abstract

One embodiment of the present invention provides a modular cutting device for cutting a latch assembly of a nuclear reactor, comprising: a base portion; a plurality of cutting heads installed to move independently on the base portion; a first fixing portion installed on the base portion and including a first fixing chuck that is rotatable while fixing one end of the latch assembly; a second fixing portion installed on the base portion facing the first fixing portion and including a second fixing chuck that is rotatable while fixing the other end of the latch assembly; a rotary motor for rotating the first fixing chuck or the second fixing chuck; and a plurality of supporting portions installed on the base portion and supporting a plurality of cutting positions of the latch assembly.

Inventors

  • 김해웅
  • 박광수
  • 김창규
  • 김인후

Assignees

  • 두산에너빌리티 주식회사

Dates

Publication Date
20260513
Application Date
20240626

Claims (10)

  1. As a modular cutting device for cutting a latch assembly of a nuclear reactor, Base section; A plurality of cutting heads installed to move independently on the base portion; A first fixing part including a first fixing chuck that is installed on the base part and is rotatable while fixing one end of the latch assembly; A second fixing part including a second fixing chuck that is installed on the base part so as to face the first fixing part and is rotatable while fixing the other end of the latch assembly; A rotary motor for rotating the first fixed chuck or the second fixed chuck; and It includes a plurality of support members installed on the base member and supporting a plurality of cutting positions of the latch assembly; The above latch assembly is, External pipe; and It includes an inner pipe installed inside the outer pipe with a spring interposed between it and the outer pipe, and A modular cutting device characterized in that, before the plurality of cutting heads cut the entire cross-section of the latch assembly when the latch assembly is stopped, some of the plurality of cutting heads first cut only the outer pipe of the latch assembly when the latch assembly is rotated.
  2. In paragraph 1, A modular cutting device characterized in that the plurality of cutting heads cut the plurality of cutting positions of the latch assembly simultaneously or individually.
  3. delete
  4. delete
  5. In paragraph 1, A modular cutting device characterized in that each of the above-mentioned plurality of cutting heads can be operated remotely.
  6. In paragraph 5, A modular cutting device further comprising one or more cameras for monitoring multiple cutting positions of the above latch assembly.
  7. In paragraph 1, A modular cutting device further comprising a byproduct collection unit for collecting byproducts generated when cutting the above latch assembly.
  8. In Paragraph 7, The above base part is composed of a base frame with a space formed inside, and A modular cutting device characterized in that the above-mentioned byproduct collection unit is positioned in a space within the base frame.
  9. In paragraph 1, A modular cutting device characterized in that the base part, the plurality of cutting heads, the first fixing part, the second fixing part, and the plurality of supporting parts are each individually formed and assembled.
  10. In Paragraph 9, A modular cutting device characterized in that the above-mentioned base part is composed of a plurality of detachable parts.

Description

Modular cutting device for cutting of latch assembly of nuclear reactor The present invention relates to a modular cutting device, and more specifically, to a modular cutting device in which a plurality of cutting heads can independently cut a latch assembly at different locations for cutting a latch assembly of a nuclear reactor, which is capable of remote control to prevent worker exposure to radiation, and which can be disassembled and assembled to facilitate the movement of the cutting device. The reactor's latch assembly is a structure located on the upper part of the hemispherical reactor head; for example, 50 latch assemblies may be installed in the reactor head. The reactor's control rod drive mechanism (CRDM) is installed inside these latch assemblies, and for this purpose, the latch assembly generally has a hollow pipe structure. In particular, the latch assembly is a structure that becomes radiated within the containment building during operation and is classified as radioactive waste. In order to be disposed of in a radioactive waste drum (e.g., a 200-liter drum), it must first be separated from the control rod drive mechanism (CRDM) and then cut. At this time, the cutting equipment must be designed to operate in a radioactive environment, and worker exposure during cutting must be minimized. In addition, cutting equipment must be transported into the containment building and installed at a designated work site. However, since elevators in the containment building generally have a load capacity of 300 kg or less and sufficient passageways are not provided, there is a problem that it is difficult to move the cutting equipment inside the containment building if it is too large. FIG. 1 is a perspective view illustrating a modular cutting device according to one embodiment of the present invention. Figure 2 is a top view of the modular cutting device of Figure 1. FIG. 3 is a schematic cross-sectional view showing the latch assembly of FIG. 1 separated. FIG. 4 is an exploded perspective view showing the base part of FIG. 1 in an exploded state. Figure 5 is a perspective view showing the cutting head of Figure 1 separated. FIG. 6 is a perspective view showing the first fixed part of FIG. 1 separated. FIG. 7 is a perspective view showing the second fixed part of FIG. 1 separated. FIG. 8 is a perspective view showing the support portion of FIG. 1 separated. Fig. 9 is a perspective view showing the byproduct collection unit of Fig. 1 separated. Hereinafter, a preferred embodiment of the modular cutting device of the present invention will be described with reference to the attached drawings. Furthermore, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intention or practice of the user or operator; additionally, the following embodiments are not intended to limit the scope of the present invention but are merely exemplary details of the components presented in the claims of the present invention. To clearly explain the present invention, parts unrelated to the description have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Throughout the specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may additionally include other components. In addition, components referred to as '~parts' throughout the specification may consist of two or more components combined into a single component, or a single component may be divided into two or more components based on more detailed functions. Furthermore, each component described below may additionally perform some or all of the functions performed by other components in addition to its primary function, and it goes without saying that some of the primary functions performed by each component may be exclusively performed by other components. Referring to FIGS. 1 to 9, a modular cutting device (1) according to one embodiment of the present invention will be described. The modular cutting device (1) of the present invention is a device for cutting a latch assembly (10) of a nuclear reactor and includes a base part (100), a plurality of cutting heads (200), a first fixing part (300), a second fixing part (400), a rotary motor (500), and a plurality of support parts (600). The base portion (100) is intended to support the components of the cutting device, and in this embodiment, it is made of a base frame with an internal space. However, it is not limited thereto, and depending on the case, the base portion (100) may be made of a flat base plate. A plurality of cutting heads (200) are installed on the base portion (100) so as to be able to move independently. That is, a plurality of cutting heads (200) are individually installed on the base portion (100) so that they can move independently without affecting