KR100764093B1 - Storage and transfer vessel of capsules charged spent nuclear fuel rods - Google Patents

Abstract

A storage and transfer vessel of capsules charged with spent nuclear fuel rods is provided to reduce the frequency of transfer by simultaneously transferring a plurality of spent nuclear fuel rods to a slitting apparatus. A storage and transfer vessel of capsules charged with spent nuclear fuel rods includes a body(100), a storage rack, a capsule guide, a lid(200) and a hooking unit(300). The storage rack is received inside the body(100), and has a storage hole. The capsule guide is coupled at the storage hole, and guides the capsule which stores the spent nuclear fuel rods. The lid(200) opens and closes the body(100), and has a transfer knob(210) at the upper surface. The hooking unit(300) attaches/detaches the lid(200) to/from the body(100).

Description

STORAGE AND TRANSFER VESSEL OF CAPSULES CHARGED SPENT NUCLEAR FUEL RODS}

1 is a perspective view illustrating a storage and transfer container of a spent fuel rod loaded capsule of the present invention.

Figure 2 is a cross-sectional view showing the storage and transfer container of the spent fuel rod loaded capsule of the present invention.

3 is an exploded perspective view showing the structure of the capsule of the present invention.

Figure 4 is a perspective view for explaining the operating mechanism of the hooking unit of the present invention.

5 is an exploded perspective view showing a state in which the capsule is stored in the storage container of the spent fuel rod loaded capsule and the transfer container of the present invention.

<Explanation of symbols for main parts of the drawings>

10 ： Storage and transfer container of spent fuel rod loading capsule

100: body 110: storage rack

120: Capsule guide 200: Storage container lid

210: Transfer handle 300: Hook unit

400: capsule 420: separation cell

500: cap 600: spent nuclear fuel rod

The present invention relates to a container for storing and transporting spent fuel rod loaded capsules, and more particularly, to transfer several capsules storing the cut spent fuel rods at once, which may occur when transferring spent fuel rods. The present invention relates to a container for storing and transporting spent fuel rod-loaded capsules that can reduce the risk of work such as a safety accident.

Nuclear fuel refers to a substance that can be charged into a nuclear reactor and get energy available by chaining nuclear fission, and spent fuel refers to a substance remaining after nuclear fission.

There are roughly two ways to manage spent fuel. One method is to put spent nuclear fuel in rocks over 500 meters underground and thoroughly isolate it from the human ecosystem. This is called permanent disposal. Another method is to separate the recycled material from the spent fuel, reuse the fuel material and permanently dispose of the radioactive material.

In order to mechanically treat the spent fuel in the form of nuclear fuel rods, it is cut in units of 25 cm and moved to a processing space such as a hot cell, and then a slitting operation is performed to separate the fuel rods into a cladding tube and pellets.

The problems of this prior art are as follows.

First, when the slitting operation of the loaded spent fuel rods is completed, there is a need to repeat the operation of transferring and loading the used fuel rods one by one again. To carry one by one, not only takes a very long time, but also increases the operating costs.

Second, as the working time is delayed, the possibility of radioactive leaks from used nuclear fuel rods increases, increasing the risk of safety accidents.

Third, there is a problem in that the subsequent process of the slitting work is likely to be delayed together as the working time is long due to low transfer efficiency.

Fourth, if you carry spent fuel rods one by one, the risk of accidents due to mistakes during robot or manipulator operation, such as falling accidents, increases.

Therefore, the present invention is to solve the above problems, the storage and transfer container of spent nuclear fuel rod loaded capsule that can improve the work and transfer efficiency by transferring a plurality of capsules stored spent nuclear fuel rod to the slitting device at once In providing.

It is another object of the present invention to provide a storage and transfer container for spent nuclear fuel rod loaded capsules which can reduce the number of transfers and minimize the risk of falling during transfer.

Still another object of the present invention is to provide a storage and transfer container for a spent fuel rod loaded capsule that can temporarily store the capsule when the spent fuel rod is not stored in a hot cell.

It is still another object of the present invention to provide a storage and transfer container for spent fuel rod loaded capsules capable of storing capsules in which slitting operations are completed.

Another object of the present invention can be carried and loaded directly into the capsule after use of the spent fuel rods can prevent accidents due to mistakes during operation of the robot or manipulator, the spent fuel rods loaded capsule can improve the reliability of the operation To provide a storage and transport container.

In order to achieve the object of the present invention as described above, the storage and transfer container of the spent fuel rod loaded capsule of the present invention is the body that can accommodate the capsule storing the spent nuclear fuel rod and the inside of the main body to accommodate the capsule It includes a storage rack is formed with a storage hole, the capsule guide to guide the capsule is coupled to the storage hole in order to easily accommodate the capsule in the storage hole formed in the storage rack. In addition, the main body is opened and closed, the upper side is provided with a storage container lid having a transfer handle, the main body and the storage container lid is removable by the hooking unit.

The capsule provides space for accommodating a plurality of spent fuel rods. The capsule is externally formed with a capsule housing, and therein is formed a separation cell for arranging spent fuel rods in a vertical position and isolating each other. In addition, the lower surface of the capsule housing is formed with an outlet for discharging the selected spent nuclear fuel rods can be used to transfer the spent nuclear fuel rods discharged from the capsule to another device.

The separation cell has a cylindrical shape, and a plurality of isolation wings extending outwardly are formed to accommodate the cutting fuel rods respectively in the accommodation spaces between the isolation wings. Each of the cutting spent fuel cutting fuel rods may be accommodated in a receiving space between the recessed wings.

The hooking unit has a locking ring bar that protrudes in a pillar shape on the side of the main body, and has a hook shape, formed on the side of the storage container lid to support the locking ring coupled to the locking ring bar, and the binding lever and the binding lever coupled to the locking ring. To include a first projection and a second projection, when the storage container lid is coupled to the body so as not to be separated from each other.

The body and the lid of the container are open so that the capsule can be observed, and the part of the front is open. When storing the capsule containing the spent fuel rod inside, the storage status can be visually checked.

The storage rack is rectangular in shape and coupled across the inside of the main body, and a plurality of storage holes are formed on the surface thereof. In addition, two or more storage holes may be formed in order to store and transport the capsule in which a large amount of spent nuclear fuel rods are stored.

Capsule guide is coupled to the storage hole, the upper side is a shape having a larger cross-sectional area than the lower side, the specific shape is preferably a funnel shape. Like the storage hole, two or more capsule guides may be formed.

The transfer handle is rotatably coupled to the top surface of the reservoir lid to facilitate storage of the spent fuel rod loaded capsule and transport of the transfer container.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments.

1 is a perspective view showing the storage and transfer container of the spent fuel rod loaded capsule of the present invention.

As shown therein, the storage and transfer container 10 of the spent fuel rod loaded capsule includes a main body 100, a storage container lid 200, and a hooking unit 300.

The main body 100 has a first opening 130 is formed in a rectangular shape on a portion of the front surface. The inside of the main body 100 may be visually observed from the outside through the first opening 130. In addition, a storage space is formed inside the main body 100 to store a plurality of capsules in which a plurality of spent nuclear fuel rods are stored.

The storage container lid 200 may cover the upper side of the main body 100. The storage container lid 200 has a second opening 220 having a square shape in the same direction as the first opening 130. The inside of the storage container lid 200 can also be visually observed from the outside through the second opening 220. A transfer handle 210 is formed on the upper surface of the storage container lid 200 so as to transfer the storage and transfer container 10 of the spent fuel rod loaded capsule by an external device such as an in-cell crane. The transfer handle 210 is coupled to the storage container lid 200, it is designed to be rotated around the coupling portion to facilitate the transport of the spent fuel rod loaded capsule and storage container (10). Can be.

Hooking unit 300 is formed on the side of the main body 100 and the storage container lid 200. The hooking unit 300 has a locking ring bar 320 protruding in a pillar shape on the side of the main body 100, a hook shape on the side of the storage container lid 200, the locking ring bar 320 ) Is coupled to the locking ring 310 and the binding lever 330 of the locking ring 310 is formed. In addition, the binding lever 330 includes a first protrusion 340 and a second protrusion 350 to support the movement after rotation.

Figure 2 is a cross-sectional view showing the storage and transfer container of the spent fuel rod loaded capsule of the present invention.

As shown therein, the storage and transfer container 10 of the spent fuel rod loaded capsule 10 includes a main body 100, a storage container lid 200, a storage rack 110, a capsule guide 120, and a hooking unit. 300.

The main body 100 has a first opening 130 is formed on the front surface, the internal storage space can be visually observed from the outside, the storage rack 110 is accommodated in the internal storage space. The storage rack 110 has a quadrangular shape and is coupled across the inside of the main body 100, and thirteen storage holes 115 may be formed on a surface thereof. However, the present invention is not limited thereto and may be formed in various numbers by changing sizes of the main body 100 and the storage rack 110. Each of the storage holes 115 may be inserted and fixed with a capsule 400 storing the spent nuclear fuel rods.

In order to easily insert the capsule 400 into the storage hole 115, the capsule guide 120 having a funnel shape is formed in the storage hole 115. The capsule guide 120 is formed in the upper side, the inner diameter is reduced toward the lower side, due to this shape can serve to guide the capsule 400 is easily accommodated in the storage rack (110).

The upper portion of the main body 100 is open and may cover the storage container lid 200 to safely transport and store the capsule 400. A second opening portion 220 is formed on a portion of the front surface of the storage container lid 200 so that the inside of the storage container lid 200 can be visually observed from the outside. The upper side of the storage container lid 200 is coupled to the transfer handle 210, it is possible to rotate around the coupling portion.

In order to couple the main body 100 and the storage container lid 200, one hooking unit 300 is formed on each side of the main body 100 and the storage container lid 200.

3 is an exploded perspective view illustrating the structure of one capsule of the present invention.

Referring to this, the capsule 400 for storing the spent nuclear fuel rod 600 includes a capsule housing 410, a separation cell 420 and the outlet 430, the capsule 400 Cap 500 for conveying can be formed separately. The capsule housing 410 may form an appearance of the capsule 400 and accommodate the separation cell 420 therein.

The separation cell 420 inserted into the capsule 240 makes a space in which the spent nuclear fuel rod 600 can be mounted at approximately 60 degree intervals, and a plurality of spent nuclear fuel rods 600 between the mounting spaces 424. Isolation blades 422, each of which can be isolated, are formed extending in the outward direction. The isolation wings 422 may be continuously formed in the longitudinal direction of the separation cell 420, or two may be partially formed at both ends as in the present embodiment.

The isolation blades 422 are formed at approximately 60 degree intervals so that a total of six spent nuclear fuel rods may be mounted, but the present invention is not limited thereto, and the number of angles or angles of the isolation wings 422 may be adjusted to use various numbers. After the nuclear fuel rod 600 may be designed to be mounted. Part of the lower surface of the capsule 400 is cut off and the discharge port 430 is formed so that the nuclear fuel rods 600 are cut out after use.

The spent nuclear fuel rods 600 are inserted one by one into the mounting space 424 between the isolation blades 422, and the nuclear fuel rods after cutting are inserted into about 20 to 30 cm. The cap 500 is mounted on the upper end of the spent nuclear fuel rod 600, the cap 500 is coupled to the upper end of the capsule 400. However, the cap 500 is coupled to the upper end of the capsule 400 during transport, but is separated and operated after the transfer of the capsule 240 is completed.

The cap 500 is composed of a cap body 510 and a cap handle 520 coupled to the cap body 510. The cap body 510 is detachably coupled to the capsule 400, and the cap handle 520 is formed to be easily handled by a robot or a remote manipulator.

Hereinafter, the operation and effects of the storage and transfer container of the spent fuel rod loaded capsule of the present invention will be described. 4 is a perspective view illustrating the operation mechanism of the hooking unit of the present invention, Figure 5 is an exploded view showing the capsule is stored in the storage container of the spent fuel rod loading capsule and the storage container of the present invention Perspective view.

First, the spent fuel rods 600 are extracted from the spent fuel assembly at the post-irradiation test facility, and then the spent fuel rods (not shown) cut at intervals of 25 cm are encapsulated in a capsule 400 in a Padirac cask. ) Is transferred to a hot cell of a test equipment test facility designed to shield high radioactive material. Here, the capsule 400 can be loaded using a remote control to the storage rack 110 accommodated in the storage and transfer container 10 of the spent fuel rod loaded capsule. At this time, the capsule 400 is guided by the capsule guide 120 coupled to the storage hole 115 can be safely loaded in the storage rack 110 accommodated in the main body 100. Since the storage hole 115 and the capsule guide 110 are formed in thirteen, the maximum number of the capsules 400 that can be stored in the main body 100 is thirteen. Here, up to six spent nuclear fuel rods (not shown) may be accommodated in a separation cell (not shown) formed in the capsule 400. Therefore, the maximum number of spent fuel rods (not shown) that can be stored in the storage and transfer container 10 of one spent fuel rod loaded capsule is 78. When the loading of the capsule 400 in the storage and transfer container 10 of the spent fuel rod loaded capsule 10 is completed, the hook of the in-cell crane installed in the hot cell is fastened to the transfer handle 210 of the storage container lid 200. Thereafter, the storage container lid 200 is lifted upward and then moved down to the upper side of the main body 100.

When the storage container lid 200 is lowered to the upper side of the main body 100, the binding lever 330 formed on the hooking unit 300 is rotated 180 degrees clockwise by a remote controller to the lock ring bar 320. Combining the lock ring 310. In this case, the rotated binding lever 330 may be placed over the first protrusion 340 so as not to shake during transportation.

When the lock of the storage container lid 200 is completed, the hook of the in-cell crane is hooked to the transfer handle 210 of the storage container lid 200 to store and transport the spent fuel rod loaded capsule 10. Transfer the cutting fuel rod to near the slitting device.

In the slitting apparatus, the storage container lid 200 is separated from the main body 100 for the slitting operation of the spent fuel rods. To this end, the locking lever 330 may be rotated counterclockwise to separate the locking ring bar 320 from the locking ring 310 to unlock the hooking unit 300. At this time, the binding lever 330 may be placed over the second protrusion 350 so as not to shake.

When the lock of the storage container lid 200 is released, the hook of the in-cell crane installed in the hot cell is hooked on the transfer handle 210 and lifted upward to open the storage container lid 200. When the storage container lid 200 is opened, the capsule 400 is picked up by a remote manipulator and mounted on a seating plate formed in the slitting device, and then the slitting operation of the fuel rod (not shown) is performed.

When the slitting operation of the spent nuclear fuel rod loaded in the capsule 400 in the slitting device is completed, the empty capsule is loaded into the storage rack 110 using a remote controller. When the loading of the empty capsule is completed, the container 200 is closed and then transported. As an example of transfer, an in-cell crane may be used to transfer to the vicinity of the rear door, load it into a padlock lock cask, and transport it to a post-irradiation test facility.

By configuring in this way, it is possible to transport a plurality of capsules 400 to the slitting device at a time to improve the work and transfer efficiency. In addition, the number of transfers is reduced, thereby reducing the risk of falling, which can give the user confidence due to safe work. In addition, as the working time is shortened, the possibility of leakage of used nuclear fuel rods is increased, which reduces the risk of safety accidents, and transfers spent nuclear fuel rods that are transferred to the subsequent process of slitting operation due to high transfer efficiency. It can work. In addition, by transporting a plurality of spent nuclear fuel rods at once, it is possible to reduce the risk of accidents caused by mistakes during operation of the robot or manipulator, such as falling accidents.

Therefore, according to the present invention, instead of transferring the spent nuclear fuel rods one by one, there is an effect of improving the work and transfer efficiency by transferring a plurality of slitting devices.

In addition, it is possible to transfer a plurality of spent fuel rods to the slitting device at once, thereby reducing the number of transfers.

In addition, the total number of transfers is reduced, thereby reducing the risk of accidents due to mistakes during robot or manipulator operation such as falling accidents during transfer.

In addition, the shortening of the transfer time enables the rapid processing of subsequent processes and has the effect of reducing the operating costs for operating the system.

In addition, the working time is reduced, there is an effect that can reduce the likelihood of leakage, such as radiation from the spent nuclear fuel rods.

In addition, there is an effect that can be utilized as a temporary storage of the spent fuel rods when the spent fuel rods do not slitting the capsules stored in the hot cell.

In addition, there is an effect that can be recovered by storing the empty capsule after the slitting operation of the capsule stored spent nuclear fuel rods.

In addition, there is an effect that can provide reliability to the user by transporting a large amount of capsules quickly and safely.

As described above, although described with reference to the preferred embodiment of the present invention, those skilled in the art various modifications and variations of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims (17)

main body; A storage rack accommodated in the main body and having a storage hole; A capsule guide coupled to the storage hole and guiding a capsule storing spent nuclear fuel rods; A storage container lid for opening and closing the main body and having a transfer handle on the upper surface thereof; And Hooking unit for detaching the storage container lid and the main body; A spent fuel rod loaded capsule storage and transport container with a. The method of claim 1, The capsule is a storage and transfer container of the spent fuel rod-loaded capsule characterized in that it accommodates a plurality of cut spent fuel rods to form a receiving space therein. The method of claim 1, The capsule is Capsule housing; A separation cell accommodated in the capsule housing to arrange the spent nuclear fuel rods in a vertical state and to isolate the spent nuclear fuel rods from each other; And A discharge port formed on the lower surface of the capsule housing and discharging the selected spent fuel rod; Storage and transfer container of the spent fuel rod loaded capsule, characterized in that it comprises a. The method of claim 3, The separating cell has a cylindrical shape, and a plurality of isolation wings extending outwardly are formed to accommodate the cutting fuel rods in the receiving spaces between the isolation wings, respectively. . The method of claim 3, wherein The separating cell has a cylindrical shape, and a plurality of recessed wings recessed inwardly are formed to store the spent fuel cutting fuel rods in the receiving space between the recessed wings, respectively. And transfer container. The method of claim 1, The hooking unit Lock ring bar protruding in the shape of a column on the side of the main body; A hook shape, the lock ring being formed on the side of the container lid and coupled to the lock ring bar; A binding lever coupled with the locking ring; And First and second protrusions supporting the binding lever; Storage and transfer container of spent fuel rod loaded capsule comprising a. The method of claim 1, The main body and the storage container lid storage and transfer container of the spent fuel rod-loaded capsule, characterized in that the front portion is opened so that the capsule is observable. The method of claim 1, The storage rack is a quadrangular shape of the storage and transfer container of the spent nuclear fuel rod-loaded capsule, characterized in that coupled to the inside of the main body and a plurality of storage holes formed on its surface. The method of claim 1, The capsule guide is a funnel shape, the upper side has a larger cross-section than the lower side, the spent fuel rod loading capsule storage and transfer container. The method of claim 1, The capsule guide is a storage and transport container of the spent nuclear fuel rod-loaded capsule, characterized in that formed at least two or more. The method of claim 1, The transfer handle is a storage and transfer container of the spent fuel rod loaded capsule, characterized in that coupled to the rotatable relative to the upper surface of the storage container lid. A main body with a portion of the front open; A storage rack coupled to the inside of the body as a quadrangle and having a plurality of storage holes formed on a surface thereof; A capsule guide coupled to the storage hole as a funnel shape and guiding a capsule storing the spent fuel rod; A storage container lid having a part of the front surface opened and opening and closing the main body; A transfer handle coupled to the upper surface of the reservoir lid to be rotatable; And Hooking unit for detaching the storage container lid and the main body; A spent fuel rod loaded capsule storage and transport container with a. The method of claim 12, The capsule provides space for accommodating a plurality of cut spent fuel rods. Capsule housing; A separation cell accommodated in the capsule housing to arrange the spent nuclear fuel rods in a vertical state and to isolate the spent nuclear fuel rods from each other; And A discharge port formed on the lower surface of the capsule housing and discharging the selected spent fuel rod; Storage and transfer container of the spent fuel rod loaded capsule, characterized in that it comprises a. The method of claim 13, The separating cell has a cylindrical shape, and a plurality of isolation wings extending outwardly are formed to accommodate the cutting fuel rods in the receiving spaces between the isolation wings, respectively. . The method of claim 13, The separating cell has a cylindrical shape, and a plurality of recessed wings recessed inwardly are formed to store the spent fuel cutting fuel rods in the receiving space between the recessed wings, respectively. And transfer containers. The method of claim 12, The hooking unit Lock ring bar protruding in the shape of a column on the side of the main body; A hook shape, the lock ring being formed on the side of the container lid and coupled to the lock ring bar; A binding lever coupled with the locking ring; And First and second protrusions supporting the binding lever; Storage and transfer container of spent fuel rod loaded capsule comprising a. The method of claim 12, The capsule guide is a storage and transport container of the spent nuclear fuel rod-loaded capsule, characterized in that formed at least two or more.

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