Method for cutting a nuclear reactor and loading the cut material.

Abstract

The present invention relates to a method for cutting a nuclear reactor and loading the cut material, and includes the steps of: cutting the nuclear reactor through a plurality of steps to prepare the cut material; classifying the cut material into a plurality of loading shapes; and loading the cut material into a packaging container according to the loading shape, wherein the packaging container includes an outer container, an inner container, and a cover, and the loading step includes the steps of: preparing the outer container; housing the inner container in the outer container; and attaching the cover to the top of the inner container.

Description

Technical Field

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[0001] The present invention relates to a method for cutting a nuclear reactor and loading the cut pieces.

Background Art

[0002] When the operation of a nuclear power plant ends, if the nuclear power plant needs to be decommissioned, the nuclear reactor must also be decommissioned.

[0003] Nuclear reactors are generally made of carbon steel, which becomes radioactive due to neutrons, and most of them are very low-level and low-level radioactive waste. After precisely cutting a nuclear reactor that is very low-level and low-level radioactive waste, the development of cutting technology and packaging technology for safely disposing it at a disposal site are the core technologies for safe decommissioning.

Summary of the Invention

[0008] The cut material is placed in the inner container by underwater cutting, and the inner container is cylindrical, and may have numerous through holes formed on its sides and bottom to allow for the discharge of the liquid introduced when the cut material is placed inside.

[0009] The packaging container further includes an auxiliary cover that is attached to the cover, the cover being a grout port with a recessed area in the center and a number of mounting grooves formed in the recessed area, the auxiliary cover having a number of protrusions on its bottom surface, the auxiliary cover being housed in the recessed area of ​​the cover and the protrusions being inserted into the mounting grooves.

[0010] The packaging container may further include a transport container in which at least one pair of the outer containers are housed, and a transport container cover that covers and finishes the top of the transport container.

[0011] The transport container may also conform to the specifications of 1.6m[W] × 3.4m[L] × 1.2m[H].

[0012] The frame portion of the cover can be bolted to the outer container by bolting means. [Effects of the Invention]

[0013] According to the present invention, a method for cutting a nuclear reactor and charging the cut material is provided. [Brief explanation of the drawing]

[0014] [Figure 1] This is a flowchart illustrating a method for cutting a nuclear reactor and loading the cut material according to one embodiment of the present invention. [Figure 2] This figure shows the reactor cutting process in a method for cutting a reactor and charging the cut material according to one embodiment of the present invention. [Figure 3]This is an exploded perspective view of a packaging container in a method for cutting a nuclear reactor and charging the cut material according to one embodiment of the present invention. [Figure 4] Figure 3 is a perspective view showing the assembled configuration. [Modes for carrying out the invention]

[0015] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The advantages and features of the present invention, and how to achieve them, will become clear with reference to the embodiments described in detail below, along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and can be realized in a variety of different forms, but these embodiments are provided to make the disclosure of the present invention complete and to fully inform a person with ordinary skill in the art to which the invention belongs, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0016] Referring to Figure 1, a method for cutting a reactor and loading the cut material according to one embodiment of the present invention will be described.

[0017] First, the reactor is cut through several processes to prepare the cut pieces (S100).

[0018] Figure 2 shows the reactor cutting process in a method for cutting a reactor and loading the cut pieces according to one embodiment of the present invention. The reactor (RV) can be cut into seven main sections using the L-cut cutting method, taking into account its geometric structure. The cutting may be performed underwater or using a laser or the like.

[0019] The seven sections of the cutting process are divided according to the height of the reactor, and are shown as the seven sections labeled 1 through 7 on the right side of Figure 2. The outlet nozzle and inlet nozzle are set up to be separate processes.

[0020] Next, classify the cuttings into a plurality of loading shapes (S200).

[0021] Although the cuttings generated in each process are loaded into rectangular packaging containers, considering the size and shape of the cuttings, they are classified into a total of 28 loading shapes and divided into 50 packaging containers for loading. The outlet nozzle is loaded by dividing into two packaging boxes of the same loading shape and one packaging box of a different loading shape, and the inlet nozzle is loaded by dividing into two packaging boxes of the same loading shape and another two packaging boxes of the same loading shape.

[0022] What structures are loaded into the packaging container, what is the mass of the cuttings, what is the total mass after cement grouting, what is the total radioactivity, etc. are recorded, and these are utilized as essential materials for the disposal compliance inspection after being sent to the disposal site.

[0023] Next, load the cuttings into the packaging container according to the loading shape (S300).

[0024] Referring to FIGS. 3 and 4, a packaging container for nuclear power plant cuttings (hereinafter referred to as "packaging container 100") according to an embodiment of the present invention includes an outer container 110, an inner container 120, a cover 130, an auxiliary cover 140, a transport container 150, and a transport container cover 160.

[0025] The outer container 110 of the packaging container 100 has an internal space of a predetermined shape. The inner container 120 of the packaging container 100 has an internal space of a predetermined shape. The inner container is housed in the outer container 110.

[0026] Note that the cover 130 of the packaging container 100 is attached to the upper side of the inner container 120. The inner container 120 houses the cuttings 10. The inner container 120 prevents the outer container 110 from directly contacting the cuttings 10 and causing damage or deformation.

[0027] The cut material contained in the inner container 120 includes low-level or very low-level radioactive waste. The cut material can be contained in the inner container 120 by underwater cutting.

[0028] The inner container 120 is cylindrical and allows for the discharge of liquid that is introduced when the cut material 10 is placed inside. For this purpose, the inner container 120 has numerous through holes formed on its sides and bottom.

[0029] The auxiliary cover 140 of the packaging container 100 is attached to the cover 130. The cover 130 is a grout port, with an indented area 131 formed in the center. Numerous mounting grooves 132 and 133 are formed in the indented area 131.

[0030] The auxiliary cover 140 has numerous protrusions formed on its bottom surface. The auxiliary cover 140 is housed in the recessed area 131 of the cover 130, and the protrusions are inserted into the mounting grooves 132 and 133.

[0031] The transport container 150 for the packaging container 100 accommodates at least one pair of outer containers 110. The transport container cover 160 for the packaging container 100 is finished by covering the top of the transport container 150.

[0032] The transport container 150 includes a transport container 150 with dimensions of approximately 1.6m [W] x approximately 3.4m [L] x approximately 1.2m [H]. The top frame portion of the cover 130 is bolted to the outer container 110, for example, by bolting means.

[0033] The cut pieces may be stored in the inner container 120 individually or in groups of the same type. Alternatively, the cut pieces may be stored lying down at the bottom of the inner container 120. Furthermore, the cut pieces may be prepared and stored in different sizes.

[0034] Referring to Figure 4, the transport container 150 is formed in a rectangular structure.

[0035] The assembly method for packaging cut materials for nuclear power plants is as follows:

[0036] The inner container 120 is housed in the outer container 110. A cover 130 is attached to the top of the inner container 120.

[0037] Here, the inner container 120 contains the cut material, preventing the outer container 110 from coming into direct contact with the cut material 10 and causing damage or deformation.

[0038] The cut material is placed in the inner container 120 by underwater cutting. The inner container 120 is a cylindrical body, and numerous through holes are formed on its sides and bottom to allow for the discharge of the liquid that is introduced when the cut material is placed inside.

[0039] Furthermore, an auxiliary cover 140 is attached to the cover 130. The cover 130 is a grout port, with an indented area 131 formed in the center, and numerous mounting grooves 132 and 133 formed in the indented area 131.

[0040] The auxiliary cover 140 has numerous protrusions formed on its bottom surface. The auxiliary cover 140 is housed in the recessed area 131 of the cover 130, and the protrusions are inserted into the mounting grooves 132 and 133.

[0041] Here, at least one pair of outer containers 110 are housed in the transport container 150. The transport container cover 160 covers the top of the transport container 150. The top frame portion of the cover 130 is attached to the outer container 110.

[0042] The present invention, as described above, provides a method for establishing a reactor cutting process and for classifying and packaging the resulting cut material by part and weight, which is an extremely important technology for promoting economical and safe nuclear power plant decommissioning.

[0043] Embodiments of the present invention have been described above with reference to the attached drawings, but those with ordinary skill in the art to which the present invention pertains will understand that the present invention can be carried out in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not limiting.

Claims

1. A method for cutting a nuclear reactor and charging the cut material, The stage in which the reactor is cut through multiple processes to prepare the cut pieces; The step of classifying the cut pieces into multiple stacking shapes; and The step includes loading the cut pieces into a packaging container according to the aforementioned stacking shape, The aforementioned packaging container includes an outer container, an inner container, and a cover. The aforementioned loading stage is The stage in which the outer container is prepared; The step of housing the inner container in the outer container; and A method comprising the step of attaching a cover to the top of the inner container.

2. The method according to claim 1, wherein the inner container houses the cut material and prevents the outer container from coming into direct contact with the cut material and causing damage or deformation.

3. The method according to claim 2, wherein the cut material includes low-level or very low-level radioactive waste.

4. The cut pieces are placed in the inner container by cutting them underwater. The method according to claim 1, wherein the inner container is cylindrical, and a number of through holes are formed on the side and bottom surfaces, respectively, for the discharge of liquid introduced when the cut material is placed inside.

5. The packaging container further includes an auxiliary cover that is attached to the cover, The cover is a grout port, with a recessed area formed in the center, and a number of mounting grooves formed in the recessed area. The auxiliary cover has numerous protrusions formed on its bottom surface. The method according to claim 1, wherein the auxiliary cover is housed in the recessed area of ​​the cover and the protruding portion is inserted into the mounting groove.

6. The aforementioned packaging container is A transport container in which at least one pair of the aforementioned outer containers are housed, The method according to claim 1, further comprising a transport container cover that covers and finishes the top of the transport container.

7. The method according to claim 6, wherein the transport container includes a transport container having dimensions of 1.6 m [W] × 3.4 m [L] × 1.2 m [H].

8. The method according to claim 1, wherein the upper frame portion of the cover is bolted to the outer container by bolting means.

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