JP3174031B2 - Radioactive waste burial system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped structure constructed of a concrete structure for transporting a container (hereinafter referred to as a waste body) containing radioactive waste (hereinafter referred to as a buried facility). The present invention relates to a system for burying radioactive waste that is safely, reliably and densely stacked (hereinafter referred to as stationary).

[0002]

2. Description of the Related Art In radioactive waste burial facilities, liquids and fine sludge contaminated with radioactive materials, metal chips, etc. (hereinafter referred to as wastes), together with solidified materials such as cement and asphalt, can be used in drums, etc. It is in a form that can be buried by mixing into a container. These drums and other containers are stacked in, for example, 8 × 5 rows × 8 steps in a rectangular parallelepiped hole made of reinforced concrete and buried in the ground. A container such as a drum containing this type of radioactive waste is generally shown in FIG.
The burial facility as shown in FIG. 7 is buried so as to finally form. That is, a reinforced concrete structure (burial facility) 1 is constructed in a concave terrain formed by excavating the ground, and a space (hereinafter, referred to as a “space”) in which a square-shaped waste is placed.
2) are formed in a plurality of rows. In this section 2,
Containers 3 such as drums filled with radioactive waste as described above are stacked in a bale stack. Each gap of the stacked containers 3 such as drums is densely filled with a cement-based filler 4 such as mortar, so that water or the like is moved from the containers 3 such as drums or the outside of the burial facility. When invading, it prevents contact with it. Before the container 3 such as a drum can is fixed in the section 2, a concrete lid (hereinafter, referred to as an RC lid) is installed in an opening above the section 2. After the fixed amount container 3 is fixed and the cement-based filler 4 such as mortar is densely filled, the installation portion of the RC lid is R
After removing the C-lid, the opening of the section 2 is finished by casting concrete on site. Further, at least four rounds and the upper lid of the buried facility 1 having a reinforced concrete structure are covered with soil 5 having a high water-blocking property, and a soil covering 6 is further provided thereon.

In a burial facility having such a structure, in placing the container 3 such as a drum in the section 2 in the burying process, first, the RC lid installed on the upper surface of the section 2 is removed. This removal work is performed by
It is carried out using a bridge type crane which is installed so as to straddle the C-cover and straddle the buried facilities. Also, this R
The C lid is installed for the purpose of closing the opening on the upper surface of the section 2 and reducing the radiation dose emitted from the fixed waste body to the outside of the burying facility. Next, after the section 2 is opened, the wastes stored and transported in the shielding container equipped with the truck to the loading position of the crane are loaded and unloaded by the above-mentioned bridge-type crane, and ordered and densely packed in the section 2. Stack on. This stationary work is equipped with a telescopic type mast structure to suppress the cause of deterioration of the stationary accuracy such as load deflection due to the inertia force at the time of cargo handling and the bias of the suspended load center, and guarantees high operation accuracy. It is performed by a high precision automatic crane. Subsequently, after the predetermined amount of waste bodies have been placed in the section 2, in order to reduce the amount of radiation emitted outside the burying equipment and to provide a work floor for a filler filling operation and the like performed thereafter. The above-mentioned RC lid is installed again in the opening of the section 2 in the same manner as at the time of removal, and this is closed. Further, a filler supply pipe is inserted into the section 2 from a hole intentionally provided on the RC lid surface, and a cement-based filler 4 such as mortar is supplied to tightly fill the wastes in the section 2.

On the other hand, recently, it has been considered to dispose of wastes in a high radiation dose state by burying the wastes. The direction of the disposal is to create a tunnel-shaped space underground, and to construct burying facilities similar to the above in that space. The waste is to be placed and buried in the same procedure as described above. The concept of this buried facility is that, as shown in FIG. 18, a large number of buried facilities 8 are constructed in the space of the tunnel 7 artificially created underground in the longitudinal direction of the tunnel 7, and the outside of these buried facilities 8 Is surrounded by soil 5 having high water blocking properties, and a container 3 is provided in each burial facility 8.
After being stored, the cement-based filler 4 is densely filled inside with the RC lid 9 covered, and the soil 5 and the covering soil 6 having a high water-blocking property are loaded into the upper part of the RC lid 9 and backfilled. Is to do so. In this case, since the buried facility is constructed using the tunnel space created artificially underground, it is important to make the entire facility economical, and the buried facility is as wide as possible with respect to the size of the tunnel. In addition, it tends to increase the height. For this reason, the gap between the outer wall of the buried facility 8 and the inner wall of the tunnel 7 has a problem of workability, and the waste body 3 is fixed on the soil 5 or the like having a high water-blocking property when the buried facility 8 is constructed. Will be backfilled before. Also, the top of the buried facility 8 and the tunnel 7
It is desired that the space between the ceiling and the ceiling is as space-saving as possible from the viewpoint of economy.

[0005]

By the way, in each of the above-mentioned conventional techniques, for example, when the waste is in a state of a radiation dose high enough that no human is allowed to approach, or when the waste is subjected to radiation shielding to some extent, Even in some cases, the following problem arises when access is allowed only for a very short time from the viewpoint of radiation exposure protection. (1) If the crane breaks down for some reason during the stationary work of the waste, it is extremely difficult for people to approach to repair the crane, etc.
The crane cannot be repaired or restored. In other words, when one such event occurs, all subsequent work cannot be performed, and it becomes impossible to restart the work. (2) After placing the waste body, it is necessary for people to approach to fill the filling material into the section 2 and backfill the buried facilities with soil, etc. At the opening of the completed section 2, a closing lid such as an RC lid having a shielding function is required in order to reduce the amount of radiation emitted from the fixed waste body. Therefore, when handling the waste body described at the beginning, R
The C-cover installation work needs to be performed by a measure that does not require human assistance. (3) Since most of the radiation emitted from the waste has straightness, the closing lid such as the RC lid for the purpose of radiation dose reduction must be a single lid with no seam (in this case) The lid becomes heavier and it becomes difficult to handle), or if there is a seam, for example,
Lid-shaped lid that fits in an uneven shape (In this case, it is not possible to remove only the RC lid at an arbitrary location, so it is necessary to remove the extra lid, and unnecessarily raise the surrounding radiation dose state. ) Or a joint with a step joint shape (stepped shape) (in this case, there is the same problem as the above-mentioned uneven lid). However, a method of arranging a shielding material such as an iron material on the back of the joint (in this case, the stationary efficiency, that is, “total volume of waste buried in section 2 / volume of internal space of section 2”) Or a lid in which two lids are overlapped and arranged so that the joints of the lids in each layer are not located at the same position in the upper and lower layers (in this case, the waste is placed in a predetermined row). Must be removed when trying to set Is the number of lid and plural caused.) Since the required etc., problems in the structure of the conventional RC lid occurs. (4) It is considered that the radiation dose can be reduced by adding sufficient shielding to the waste. However, in this case, the volume occupied by the shielding material of the waste is larger than the volume of the waste. The idea of adding sufficient shielding capacity to this waste body reduces the efficiency of emplacement, and the waste disposal cost (= total cost for construction and operation of buried facilities / total volume of buried waste) ). In the conventional concept of a burial facility using a tunnel for burying and disposing of a waste body in a high radiation dose state (see FIG. 18), a gap between the outer wall of the burial facility and the inner wall of the tunnel is required when constructing the burial facility. At the same time, it is desirable that the space between the top of the buried facility and the tunnel ceiling should be space-saving as much as possible, as it will be backfilled with the above-mentioned soil that has high water-blocking properties. Therefore, when the conventional concept of a logistics machine such as a crane for placing a waste body is applied as it is, the following problem occurs. (5) In the conventional concept of a logistics machine such as a crane that places wastes, a bridge-type crane is used as the cargo handling machine that places wastes, and the traveling rails of the crane are moved from the buried facility at the bottom level of the buried facility. It is installed in a position farther away. However, it is physically impossible to apply this concept to the concept of a buried facility using the above tunnel because of the condition of the facility described above. We have to do it.

Therefore, as a result of intensive studies by the present inventors,
With the aim of solving these problems and making it a safer, more secure, more reasonable and economical burial facility,
The following structure and system were devised.

(A) In order to solve the above-mentioned problem (1), a crane that never fails or a crane provided with some alternative means for compensating for a single failure is solved by a single crane function. Thought comes to mind,
Under the absolute background that one occurrence of the event makes it impossible to continue the work thereafter, it must be said that the solution by this proposal is not easy. Therefore, in the present invention, as a safer and more reliable method, at any time during the waste transporting operation and the stationary operation, the waste is not exposed to the surrounding environment and is always protected in an environment where the waste is shielded. A shielding container in which a suspending device for carrying out the emplacement in the compartment 2 is provided inside a container body having a box-shaped shielding function so as to be handled;
As a means to protect the radiation emitted from the fixed waste body when the closing lid such as the lid is removed, the closing lid such as the RC lid can be attached and detached inside the box-shaped shielding structure, and the shielding container can be loaded and moved. And a transfer trolley. This shielding container is a hot cell (a building with sufficient shielding capacity and an enclosed space surrounded by shielding windows and equipped with various remotely-operable cargo-handling equipment, etc.) that can handle objects with high radiation doses. ), The waste to be placed in the compartment is to be raised and stored to a predetermined position in the shielding container after engaging with the hanger in the shielding container, and the lower door of the shielding container is closed. The structure is such that the waste in the shielding container is always placed in the shielded environment without exposing it to the surrounding environment. The transportation to the buried facility is carried out by loading the shielding container together with the transportation vehicle. The lifting and lowering device of the hanger in the shielding container is provided outside the shielding container in order to easily repair and recover even if a failure occurs in a driving mechanism such as a power generation source such as an electric motor. We arranged those mechanisms on the ceiling of the building. As a result, the ceiling portion of the shielding container main body has a minimum through-hole for allowing the wire rope for lifting / lowering the lifting tool (the lifting / lowering rope) to pass therethrough, but the shielding for the waste body lifting tool is sufficient. Ability,
And between the inner surface of the shielding container and the waste hanging equipment,
By installing an auxiliary shield on the inner surface of the shielding container, it protects the radiation emitted from the waste body engaged with the hanging equipment, and further assists to surround the upper side and the side of the through hole in the ceiling of the shielding container. Install a shield,
The structure protects radiation that may leak from the through hole. In the above shielding container, there is a twist lock opening / closing device (waste body engaging / disengaging mechanism) as a sole drive mechanism on the waste body hanging device, and this device is used when the waste body is fixed in the compartment. In the event of a failure (that is, the twist lock does not open with the waste engaged), repair the waste by re-inserting it in the shielding container and transporting the shielding container to the hot cell equipment inside the building. There is no problem because such measures can be easily taken. The above-mentioned transport trolley includes a trolley with a hanger (a hanger traversing trolley) capable of attaching and detaching a closing lid such as an RC lid installed on a section in a box-shaped shielding structure. The shielding container is structured to be loaded at a predetermined position where work is to be performed according to the arrangement of the waste bodies in the compartment. The traversing carriage driving device (the lifting / lowering hanging implement horizontal moving mechanism) for operating the above-mentioned hanging carriage traversing cart is R
At the timing when a high radiation dose state is obtained when the closing lid such as the C lid is removed from the compartment, consider the response to the occurrence of a failure and attach the equipment to the carriage so that it can be maintained. In this configuration, only a transmission medium such as a chain is installed in the carrier. In addition, if the lifting device for lifting and lowering the lifting device and the twist lock opening / closing device of the lifting device for removing and removing the lid are broken in the state where the closing lid such as the RC lid is lifted, the above-mentioned shielding container may be used. After confirming that the lower door is closed, it is possible to cope with the situation by performing a repair at a safe position in terms of the radiation dose state by running the carrier with the closing lid such as the RC lid lifted. In addition, the ceiling of the transport trolley is a detachable shielding cover, and prior to the attachment and detachment of the closing lid such as the RC lid and the loading of the shielding container, a waste body to be disposed in the future in a work plan. A series of emplacement operations are performed by removing the shielding lid corresponding to the arrangement. The removal of the shielding lid is performed by a shielding container transfer crane described later.
The shielding lid removed in this way is temporarily placed at a position where there is no obstacle on the ceiling of the transporting cart. (B) RC to be installed in a section with an emphasis on radiation protection
As with the conventional facilities, the closures such as the lids are made to have straight joints between the lids. However, a method of arranging a shielding material such as iron (shielding backup material) on the back of the joints, And easy to handle. In the case of this method, it is necessary to set the disposal body stationary arrangement so as to avoid the presence of the above-mentioned shielding material. The number of closing lids such as RC lids that need to be removed when trying to place the body can be kept to one. on the other hand,
It is also conceivable to adopt a structure in which two lids are stacked as described above and the joints of the lids in each layer are arranged so as not to be in the same place in the upper and lower layers. In this case,
A plurality of lids need to be removed, which makes it difficult to design a means for protecting radiation emitted from inside the compartment when removing a closing lid such as an RC lid of the compartment where the waste is already set. In addition, a closing guide such as an RC cover is provided with a positioning guide to eliminate the need for human intervention and to safely and securely attach / detach the closing cover such as the RC cover to / from the compartment, and a positioning guide for fitting the guide is provided. The guide rail is embedded in the side wall of the buried facility. (C) Conventionally, in order to stack wastes densely and increase the placement efficiency, a telescopic type mast structure for suppressing a cause of deterioration of the placement position accuracy, such as deflection of the load caused by bias of the suspension load center, has been adopted. Although a high-precision automatic crane provided and guaranteeing high operation accuracy was required, according to the present invention, it is used due to the effect of the positioning guide rail provided on the buried facility side and the positioning guide provided on the waste body hanging tool. The accuracy of the cargo handling machine can be general purpose. (D) In order to solve the problem of (5) above and make the burial facility more reasonable and economical, in the present invention, the top of the burial facility and the tunnel ceiling are unnecessarily used in the length direction of the tunnel. In order not to make the gap between them large, a shielding container transfer crane is installed only at a fixed point near the tunnel entrance, and the shielding container transfer crane is used to transport the shielding container containing the transported waste. The carrier was loaded on a trolley, and the transport trolley was moved using a traveling rail laid on the top of the side wall of the buried facility, so that the waste could be moved in the longitudinal direction of the buried facility. In addition, the shielding container transfer crane must be traversed,
The traveling crane has movements in three directions of lifting and lowering, and the hanging equipment of the transfer crane can be handled by one hanging equipment for both the shielding container and the shielding lid of the transport trolley, The structure and arrangement of the hanging parts on the cargo handling object side are the same.

The present invention has been made in view of the above circumstances, and an object of the present invention is to dispose a waste body in a buried facility.
To provide a radioactive waste burying system that can be safely, reliably and densely transported and placed in an environment where radiation shielding is sufficiently applied, and that has a reasonable and economical structure. is there.

[0009]

According to the first aspect of the present invention, there is provided a radioactive waste burying system for lifting a radioactive waste, transporting the radioactive waste, and placing the radioactive waste in a buried facility, wherein the shielding container stores the radioactive waste. And, the shielding container is mounted on the upper surface, and a transport vehicle that travels on the burying equipment, and a transfer means for mounting the shielding container on the transport vehicle, the shielding container is provided at the lower part of the container body An opening / closing door is provided so as to be openable and closable, an opening / closing door opening / closing mechanism is provided on the opening / closing door, and a waste body hanging tool that engages with the radioactive waste body is provided in the container body so as to be able to move up and down. A waste body lifting device elevating mechanism for lifting and lowering the waste body lifting device is provided on the tool. A mechanism is provided, and the transport trolley is , The lower portion of the shield structure is opened,
A shielding lid is detachably provided on an upper part of the shielding structure, and inside the shielding structure, a lid attaching / detaching hanging tool which engages with a closing lid for closing the buried facility is vertically movable and horizontally movable. In addition to the above, the lid-removing hanger, the lid-removing hanger elevating mechanism for elevating the lid-removing hanger and the lid-removing hanger horizontal moving mechanism for horizontally moving the lid-removing hanger are provided. On the other hand, on the other hand, the lid detaching / hanging device is provided with a closing lid engaging / disengaging mechanism for engaging / disengaging the engaging portion of the lid attaching / detaching hanging component with the closing lid, and the transfer means comprises the shielding container. A container hanger for lifting and lowering the container hanger is provided on the container hanger, and a container hanger for horizontally moving the container hanger. While the horizontal movement mechanism is provided respectively In the container hanger, the engagement portion of the container hanger is characterized in by comprising engaging disengaging shielded container engaging and disengaging mechanism is provided on the shielding container. According to the first aspect, the engaging portion of the waste body hanging tool is engaged with the radioactive waste body by the waste body engaging / disengaging mechanism, and the radioactive waste body is shielded together with the waste body hanging tool by the waste body hanging tool elevating mechanism. With the container housed in the container body and the opening / closing door opening / closing mechanism closing the lower opening / closing door of the container main body, the engaging portion of the container hanging tool is engaged with the shielding container by the shielding container engaging / disengaging mechanism of the transfer means. Then, the shielding container is transferred together with the container hanging device by the container lifting device raising / lowering mechanism and the container lifting device horizontal moving mechanism, and the shielding container is placed on the upper surface of the transport trolley, where the shielding cover has been removed in advance and opened. At the same time, the carrier truck is moved to a predetermined position of the buried facility, and the engaging portion of the cover attaching / detaching hanging device is engaged with the closing cover of the buried facility by the closing cover engaging / disengaging mechanism of the carrier vehicle. Lifting mechanism and lid removal In the state where the closing lid is lifted together with the lifting / removing hanging tool by the lifting tool horizontal movement mechanism and retracted in the horizontal direction, the shielding container located above the portion where the closing lid has been removed and opened. The lower opening / closing door is opened by the opening / closing door opening / closing mechanism, and the radioactive waste body is lowered by the waste body lifting / lowering mechanism to be fixed at a predetermined position of the buried facility. Then, after placing the radioactive waste body, the engagement state between the radioactive waste body and the waste body hanging device is released, the waste body hanging device is returned into the shielding container, the opening and closing door of the shielding container is closed, and Then, the closing lid being retracted is returned to the buried facility side to close the opening, and the shielding container is returned to the original position together with the carrier.

[0010] According to a second aspect of the present invention, the waste body lifting device lifting mechanism comprises a mechanism body installed outside the container body and a lifting rope connecting the mechanism body and the waste body lifting device. It is characterized by the following. According to the second aspect, the maintenance of the mechanism main body is performed by installing the mechanism main body other than the elevating rope of the waste body lifting device elevating mechanism connected to the waste body hanging device outside the container body of the shielding container. It can be performed in a state of being isolated from the inside of the main body, and even if the radioactive waste is stored in the main body of the container, radiation protection is surely performed.

A third aspect of the present invention is characterized in that the waste-body suspending device has a sufficient shielding ability. According to the third aspect, even when the radioactive waste is hung below the waste hanger by the waste hanger having sufficient shielding ability, the radiation emitted from the radioactive waste is reliably emitted. Shield.

A fourth aspect of the present invention is characterized in that a guide means for vertically guiding the waste body hanger is provided between the waste body hanger and the burying facility. According to the fourth aspect, the guides provided between the waste body hanging tool and the buried facility easily guide the waste body hanging tool in the buried facility in the vertical direction, so that the radioactive waste body can be smoothly guided. Is set in the buried facility.

A fifth aspect of the present invention is characterized in that a positioning means for mounting the shielding container at a predetermined position of the transporting vehicle is provided between the shielding container and the transporting vehicle. In this case, the positioning means provided between the shielding container and the transport trolley ensures that the shielding container is placed at a predetermined position on the transport trolley.

According to a sixth aspect of the present invention, a horizontal movement mechanism for the hanging device for detaching and attaching the lid is connected to a chain driving mechanism installed outside the shielding structure, and the chain driving mechanism and the hanging device for detaching and attaching the lid. And a formed chain. According to the sixth aspect of the present invention, a chain drive mechanism other than the chain of the lid removal / attachment hanger horizontal movement mechanism connected to the lid removal / attachment hanger is installed outside the shielding structure of the transport vehicle. Maintenance can be performed in a state in which it is isolated from the inside of the shielding structure, and work can be performed with sufficient shielding performance.

A seventh aspect of the present invention is characterized in that a guide means for vertically guiding the closing lid is provided between the closing lid and the burying equipment. According to the seventh aspect, the closing lid is easily guided in the up-and-down direction by the guiding means provided between the closing lid and the buried facility, and the closing lid is smoothly detached and attached to the buried facility. You.

An eighth aspect of the present invention is characterized in that a shielding backup material is provided between the closing lids of the buried facility or between the shielding lids of the shielding structure. According to this aspect, the shielding backup material provided between the closing lids of the buried facilities or between the shielding lids of the shielding structure ensures the space between the closing lids of the burying equipment or between the shielding lids of the shielding structure. To shield.

According to a ninth aspect of the present invention, the container hanger also serves as a hanger to be engaged with the shielding lid. In this ninth aspect, by engaging the container hanger not only with the shielding container but also with the shielding lid, the transfer of the shielding container and the attachment / detachment of the shielding lid are shared by the same hanging member,
The configuration of the underground system is simplified, and a reasonable and economical underground system is constructed.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a side view of FIG.
4 is a front view of the shielding container transfer crane, FIG. 5 is a side view of a state where the container hanging device of FIG. 4 is fitted to the traveling vehicle, and FIG. 6 is a state where the container hanging device of FIG. 4 is lowered from the traveling vehicle. Side view of the
7 is a front view of the shielding container, FIG. 8 is a plan view of FIG. 7, and FIG.
FIG. 10 is a cross-sectional view of FIG. 8 as viewed from the side, FIG. 10 is a cross-sectional view of the lower opening / closing door portion of the shielding container, FIG. 11 is a cross-sectional view of the transport cart as viewed from the front, FIG.
FIG. 14 is a plan view of the transport cart of FIG. 12, except for a ceiling portion of the transport cart of FIG. 12, FIG. 15 is a plan view of the transport cart of FIG. FIG. 4 is a perspective view of a hanging member engaging / disengaging portion.

In these figures, reference numeral 20 denotes a gate-shaped fixed gantry, and a yard transport vehicle 21 can enter and leave at the lower center of the fixed gantry 20.
The yard transportation vehicle 21 is configured such that a shielding container (shielding container) 30 for disposing of a waste body is placed on its loading platform. Further, a pair of traverse rails 22 are laid on the upper surface of the fixed gantry 20, and a shielding container transfer crane (transfer means) 4 is mounted on these traverse rails 22.
0 is provided so as to be able to run.

The shielding container transfer crane 40 is shown in FIG.
As shown in FIG. 6 to FIG. 6, traveling wheels 401 are rotatably provided on the lower legs of the movable gantry 400.
01 is connected to a drive mechanism 402 for driving the traveling wheels, and a container hanger horizontal movement mechanism 42 is movably provided on the upper surface of the movable gantry 400. An elevating mechanism 44 is provided, and the elevating wire rope 440 of the container hanger elevating mechanism 44 is provided.
The container hanger 46 is connected to the
And a twist lock device (shielding container engaging and disengaging mechanism) 47 is connected to the device.

In the container hanging tool horizontal moving mechanism 42, a running rail 420 parallel to the traverse rail 22 is laid on the upper surface of the moving gantry 400.
The first traveling vehicle 421 is provided so as to be able to travel thereon, and the second traveling vehicle 423 is mounted on a traveling rail 422 laid on the first traveling vehicle 421 in a direction perpendicular to the traveling direction of the first traveling vehicle 421. The driving mechanisms 424 and 425 are provided so as to be able to travel along the traveling vehicles, and cause the traveling vehicles 421 and 423 to travel.
Are connected to each other to form a schematic configuration.

The container lifting / lowering mechanism 44 includes an electric motor 441 on the second traveling carriage 423 and an electric motor 441.
, And four rotating drums 443 connected to the gear box 442, respectively, and the lifting wire rope 440 is wound around each of the rotating drums 443. Things. Then, the first and second traveling vehicles 4
An opening and a through-hole for hanging the elevating wire rope 440 are formed in each of 21, 21 and 423.

The container hanging device 46 is provided with a rectangular plate-shaped hanging device main body 460 in which the lower end of each of the lifting wire ropes 440 is connected to a square portion, and rotatably provided with the hanging device main body 460 inserted. Twist lock (engagement part) 461
And the subject. This twist lock 4
As shown in FIG. 16, 61 has a lower end portion formed in an elliptical cone shape, and is connected to the twist lock opening / closing device 47 installed on the upper surface of the hanging tool main body 460. The twist lock opening / closing device 47 causes the twist lock 461 to rotate 90 degrees around its axis.

At both ends of the upper surface of the hanger main body 460, a pair of truncated conical hanger anti-sway posts 462 are provided, respectively.
62, on the lower surface of the second traveling vehicle 423,
A hanging tool steadying guide 426 is provided. And
Each of the hanging member steadying posts 462 is configured to be able to fit into these hanging member steadying guides 426.

As shown in FIGS. 1 to 10, the shielding container 30 is provided with a pair of opening and closing doors 301 at the lower part of a rectangular cylindrical container body 300 so as to be openable and closable in a horizontal direction. An opening / closing door opening / closing mechanism 32 is connected to the container body 300, and a waste body hanger 34 that engages with the rectangular solid waste (waste body) 23 is provided inside the container body 300 so as to be able to move up and down. 34, a waste body lifting device elevating mechanism 36 is provided. On the waste body lifting device 34, a twist lock opening / closing device (disposal) for engaging the twist lock (engaging portion) 341 of the waste body lifting device 34 with the waste body 23 is provided. A body engagement / disengagement mechanism) 35 is provided and schematically configured.

The two doors 301 are formed so that the portions opposing each other are formed in a stepped shape and are fitted to each other, so that when the doors are closed, sufficient shielding performance can be obtained. ing. The opening / closing door opening / closing mechanism 32 includes a motor 320 installed at a lower portion of the outer surface of the container body 300 and a transmission mechanism 3 connected to the motor 320.
21 and a ball screw mechanism 322 connected to the transmission mechanism 321 and penetrating the container body 300 and connected to the opening / closing door 301 therein.

The transmission mechanism 321 transmits the rotation of the electric motor 320 to the ball screw shafts 323 of the ball screw mechanisms 322 via the gear box 325, the rotating shaft 326 and the gear box 327. In these ball screw mechanisms 322, ball nuts 324 screwed to the respective ball screw shafts 323 are attached to both ends of the respective opening / closing doors 301.
3 is converted into a linear motion of the ball nut 324 in a direction along the axis of the ball screw shaft 323, so that each door 301 opens and closes in the horizontal direction.

Each of the doors 301 and the container body 30
A linear guide 328 is provided between the linear guide 328 and the lower part of the door 301 so that each of the open / close doors 301 smoothly moves horizontally by being guided by the linear guide 328.

The above-mentioned waste body lifting / lowering mechanism 36 includes an electric motor 360, a gear box 361 connected to the electric motor 360,
61; two rotating drums 362 connected to the rotating drum 61; a gear box 363 connected to these rotating drums 362;
The rotating drum 3 connected to these gear boxes 363
64, and these rotating drums 362,
Elevating wire rope 3 wrapped around each 364
The lower end of the through hole 30 is formed in the through hole 30 formed in the container body 300.
2 and a rectangular plate-shaped hanging member main body 340 of the waste body hanging member 34
It is connected to four places on the upper surface of.

The waste body suspending device 34 includes the suspending device main body 34.
0 and a twist lock (engaging portion) 341 rotatably provided in a state where the hanging tool main body 340 is inserted. As shown in FIG. 16, the lower end of the twist lock 341 is formed in an elliptical cone shape as shown in FIG. 16, and the twist lock opening / closing device installed on the upper surface of the hanging tool main body 340 is provided. 47 is connected to a twist lock opening / closing device 35 having the same configuration as that of the twist lock opening / closing device 35. Then, the twist lock opening / closing device 35 causes the twist lock 341 to rotate 90 degrees around its axis.

At the four corners of the upper surface of the waste body 23, opposite to the twist lock 341, twist lock hardware 24 having an elongated twist lock hole 240 is mounted. The twist lock 341 is fitted into and engaged with the hole 240.

Further, trapezoidal positioning guides 342 are provided on both end surfaces of the hanging tool main body 340, and the positioning guides 342 are fitted on the inner surface of the container main body 300 in opposition to the positioning guides 342. A guide rail 303 is formed vertically.

Further, a pair of lifting frames 304 is installed on the upper surface of the container body 300 on the side of the rotating drums 362 and 364 so as to straddle the rotating drums 362 and 364. A slot-shaped twist lock hole 308 for engaging the twist lock 461 of the container hanging tool 46 on the upper surface of the frame 304.
(See FIG. 8).

Further, as shown in FIG. 9, an auxiliary shield 305 is provided on the inner surface of the container main body 300 at the upper stop position of the hanger main body 340, and is provided on the upper surface of the container main body 300. Are rotating drums 362, 36
An auxiliary shielding body 306 is installed so as to cover 4.

A traveling rail 403 parallel to the traveling rail 422 is laid under the moving frame 400 of the shielding container transfer crane 40, and a side wall of the burying equipment 60 adjacent to the shielding container transfer crane 40. A traveling rail 600 connected to the traveling rail 403 is laid on the top. And these running rails 403, 600
Above, a transport carriage 50 is provided so as to be able to travel.

As shown in FIGS. 11 to 15, the transport carriage 50 has an opening at the lower part and a large number of shielding lids 50 at the upper part.
A rectangular tubular shielding structure 501 which is detachably provided in a state in which 0 is lined up, and which is provided inside the shielding structure 501 so as to be movable up and down and horizontally movable,
A lid detachable hanging tool 52 that engages with an RC lid (blocking lid) 601 that closes the cover 0, and a lid detachable suspender lifting mechanism that is provided on the lid detachable suspending tool 52 and that moves the lid detachable suspending tool 52 up and down. 54
A lid removal / removal hanger horizontal movement mechanism 56 provided in the lid removal / removal hanger lifting mechanism 54 for horizontally moving the lid removal / removal hanger elevation mechanism 54 together with the lid removal / removal hanger 52; Provided on the hanging tool 52,
Of the twist lock (engaging portion) 521 of the RC lid 601
Twist lock opening / closing device that locks / unlocks (closed lid lock / unlock mechanism)
53.

The hanger horizontal moving mechanism 56 for detaching and attaching the lid is provided on a traversing rail 502 laid on the inner surface of the shielding structure 501 so as to be able to travel in a direction perpendicular to the traveling direction of the shielding structure 501. A horizontal trolley 560, a pair of chains 561 having both ends connected to the front and rear ends of the horizontal trolley 560, a sprocket 562 provided on the outer end surface of the shielding structure 501, and winding the chains 561, respectively. A transmission mechanism 563 connected to the sprocket 562; and an electric motor 564 connected to the transmission mechanism 563 and driving each of the chains 561.
And a chain guide 565 that is provided above the traversing rail 502 and that supports the upper portion of each of the chains 561 from below and prevents the chain 561 from hanging down.

The transmission mechanism 563 transmits the rotation of the electric motor 564 to each sprocket 562 via a gear box 566 and a rotating shaft 567, whereby the chain 561 wound around each sprocket 562 is transmitted. When driven, the traversing carriage 560 to which both ends of the chain 561 are connected runs along the traversing rail 502. An auxiliary shielding body 568 is provided on the outer end surface of the shielding structure 501 while covering the sprockets 562.

The lifting / lowering mechanism 54 for lifting and removing the lid is an electric jack. The motor 540 provided on the upper surface of the traversing truck 560, the gear box 541 connected to the motor 540, and the gear box 541 are connected. And a lifting shaft 543 that is connected to the gear box 542 and that moves up and down while penetrating the traversing carriage 560.

The hanging device 52 for detaching and attaching the lid is provided with the lifting shaft 54.
The main body is composed of a rectangular plate-shaped hanging member main body 520 connected to the lower end of 3 and a twist lock 521 rotatably provided with the hanging member body 520 inserted. As shown in FIG. 16, the lower end of the twist lock 521 is formed in an elliptical cone shape as shown in FIG.
Twist lock opening / closing device 4 installed on the upper surface of
It is connected to a twist lock opening / closing device 53 having the same configuration as that of 7, 35. Then, the twist lock opening / closing device 53 causes the twist lock 521 to rotate 90 degrees around its axis.

On the upper surface of each shielding lid 500, a twist lock metal 24 having an elongated twist lock hole 240 is mounted so as to face the twist lock 461 of the container hanging tool 46. Twist lock hole 24
The twist lock 461 fits into and engages with zero. The twist lock 461 also engages with the twist lock hole 308 formed in the lifting frame 304 of the shielding container 30 described above.

On the lower surface of the trolley 560 and outside of the hanger main body 520, a hanger storage guide 503 for housing the hanger main body 520 is attached in a hanging state. Further, the shielding lid 5 of the shielding structure 501 is provided.
Between 00, there is a shielding backup material 50 made of iron or the like.
4 are provided.

Further, on the upper surface of the shielding structure 501, on both sides of each shielding lid 500, positioning pins 505 each having a truncated cone shape are provided. A positioning hole 307 that matches the positioning pin 505 is formed in a protruding portion facing the positioning pins 505 and protruding laterally from both end surfaces of the container body 300 of the shielding container 30. These positioning pins 5
The positioning means for placing the shielding container 30 at a predetermined position of the transport carriage 50 is constituted by the positioning hole 05 and the positioning hole 307.

A burial facility 60 for burying the waste body 23
Is a square-shaped structure constructed of a concrete structure, and includes a plurality of partition walls 602 orthogonal to the traveling rail 600.
The interior buried space is divided into many. Further, a step portion 604 for mounting and supporting the RC lid 601 is formed on the inner wall surface 603 and the partition wall 602 of the burying facility 60 which are orthogonal to the longitudinal direction of the waste body 23.

The step 604 is provided with the RC lid 601.
Guide rails 606 that engage with trapezoidal positioning guides 605 formed on both end surfaces of the cover 601 and guide the RC lid 601 in the vertical direction are laid in the vertical direction. The positioning guide 605 and the guide rail 606 constitute guide means for guiding the RC lid 601 in the vertical direction.

Further, the inner wall surface 603 of the buried facility 60
A guide rail 607 that engages with the positioning guide 342 of the waste body hanging tool 34 of the shielding container 30 and guides the waste body hanging tool 34 in the vertical direction is laid on the partition wall 602 in the vertical direction. The positioning guide 342 and the guide rail 607 constitute guide means for vertically guiding the waste body hanging tool 34 in a state where the waste body 23 is suspended.

Further, each RC of the buried facility 60
Between the lids 601, a shielding backup material 608 made of an iron material or the like is provided. On the other hand, on the upper surface of each of the RC lids 601, the twist lock 52
The twist lock hardware 24 having the elongated twist lock hole 240 is mounted opposite to the twist lock hole 1, and the twist lock 521 is fitted into and engaged with the twist lock hole 240.

The twist lock 34 of the waste hanging member 34
1 is a twist lock opening / closing device 35 which is a waste body engaging / disengaging mechanism which engages with the twist lock hole 240 of the twist lock hardware 24 of the waste body 23, and the twist lock 4 of the container hanging tool 46.
Twist lock opening / closing device 47 which is a shielding container engaging / disengaging mechanism which engages 61 with twist lock hole 308 of lifting frame 304 of shielding container 30 or twist lock hole 240 of twist lock metal 24 of shielding lid 500 of carrier 50, or The twist lock 521 of the lid attaching / detaching hanging tool 52 is replaced with the twist lock hardware 24 of the RC lid 601.
Since the twist lock opening / closing device 53, which is a closing lid engaging / disengaging mechanism that engages with the twist lock hole 240, has the same configuration, the twist lock opening / closing device 53 will be described as a representative here. Twist lock opening / closing device 3
Descriptions of 5 and 47 are omitted.

The twist lock opening / closing device 53 is the same as that shown in FIG.
As shown in FIG. 5, an electric cylinder 530 rotatably provided in a horizontal plane on the upper surface of the hanging device main body 520 of the lid attaching / detaching hanging device 52, a sliding rod of the electric cylinder 530, and a pair of twist locks 521. And a link mechanism 531 for connecting. Then, by moving the sliding rod of the electric cylinder 530 forward and backward, each twist lock 521 is
It is designed to rotate 90 degrees about their axis.

In the radioactive waste burying system configured as described above, when the waste body 23 is to be fixed in the burying facility 60, first, the transport carriage 50 is placed in the movable mount 400 of the shielding container transfer crane 40. While waiting for
The shielding lid 50 at a predetermined position among the shielding lids 500 provided above the shielding structure 501 of the transport carriage 50.
Remove 0. That is, an operation of removing the shielding lid 500 at a position corresponding to the RC lid 601 of the burying equipment 60 that needs to be opened to carry the waste body 23 is performed.

The removing operation of the shielding cover 500 is performed by first rotating the rotary drum 443 via the gear box 442 by the electric motor 441 of the container lifting / lowering mechanism 44 to wind up the lifting wire rope 440 to lift the container. The container hanging tool 46 is raised, and the hanging tool steadying post 462 of the container hanging tool 46 is fitted into the hanging tool steadying guide 426 provided on the lower surface of the second traveling vehicle 423, and the container hanging tool 46 is moved to the second traveling vehicle. The container hanger 46 is transported by the first and second traveling carts 421 and 423 of the container hanger horizontal movement mechanism 42 while being fixed to the container 423 so as not to swing.
0 is located above the shielding lid 500 to be removed.

In this case, the above-mentioned hanging member steady rest post 462 is used.
Is formed in the shape of a truncated cone, even if there is a slight horizontal deviation between the hanging member steadying post 462 and the hanging member steadying guide 426, the frustoconical shaped hanging member steadying post 462 is formed. The suspension guide 426 is guided to the inclined surface of, and the suspension post 462 easily fits into the suspension guide 426.

Next, by the container lifting / lowering mechanism 44,
The container hanging tool 46 is lowered, and the twist lock 461 of the container hanging tool 46 is inserted into the twist lock hole 2 of the shielding cover 500.
After the twist lock 461 is rotated by 90 degrees about the axis thereof by the twist lock opening / closing device 47 after the fitting, the twist lock 461 is engaged with the twist lock hardware 24, and the container hanger 46 is The shielding lid 500 is connected.

In this state, the container hanger lifting mechanism 44 and the container hanger horizontal movement mechanism 42 are sequentially operated to
Is lifted together with the shielding lid 500, moved horizontally, and further lowered to remove the shielding lid 500 to open a predetermined position on the upper surface of the shielding structure 501, and to attach the shielding lid 500 to the shielding structure 5
The waste body 23 is placed on the shielding lid 500 at a position on the upper surface of the waste body 23 which does not interfere with the work of placing the waste body 23.

Next, the twist lock 461 is turned around the axis by 90 degrees by the twist lock opening / closing mechanism 47.
After turning the twist lock 461 and the twist lock hardware 24 to release the engagement state, the container hanger 46 is raised by the container hanger elevating mechanism 44 and the hanger steadying post 462 is hung. The container hanging tool 46 is fixed to the second traveling carriage 423 by being fitted again into the stop guide 426.

In this state, the yard transport vehicle 21 loaded with the shielding container 30 in which the waste 23 is stored enters the lower part of the center of the fixed base 20. In this case, in the shielding container 30, a twist lock opening / closing device 35 is used in advance in a hot cell.
By engaging the twist lock 341 of the waste body hanging tool 34 with the twist lock hardware 24 of the waste body 23, the waste body 23 combined with the waste body hanging tool 34 is stored, and the opening / closing door opening / closing mechanism is provided. By 32, the opening / closing door 301 at the lower part of the shielding container 30 is closed.

When the premises transportation vehicle 21 stops at the center lower portion of the fixed base 20, the container hanger 46 is horizontally moved by appropriately operating the container hanger horizontal movement mechanism 42 and the container hanger elevating mechanism 44. And lowered, and the shielding container 30 loaded on the premises transport vehicle 21
The twist lock 461 of the container hanging tool 46 is fitted into the twist lock hole 308 formed in the lifting frame 304 of the lifting frame 304. Subsequently, the twist lock 461 is rotated by 90 degrees around its axis by the twist lock opening / closing device 47, and the The lock 461 is engaged with the lifting frame 304 of the shielding container 30, and the container hanging tool 46 is connected to the shielding container 30.

Next, in this state, the container lifting / lowering mechanism 4
4 and the container hanger horizontal movement mechanism 42 are sequentially operated to raise the container hanger 46 together with the shielding container 30 in which the waste body 23 is stored, move the container hanger horizontally, and then lower it. Then, the shielding container 30 is placed on the transport trolley 50 so as to close the opening of the transport trolley 50.

In this case, the shielding structure 501 of the carrier 50 is inserted into the positioning holes 307 formed in the shielding container 30.
The positioning pin 505 provided on the trolley 50 is fitted, whereby the positioning is performed smoothly, and the shielding container 30 is surely placed at a predetermined position of the transport carriage 50.

Further, since the positioning pin 505 on the side of the transport vehicle 50 is formed in a truncated cone shape and the positioning hole 307 of the shielding container 30 is formed in a shape matching the positioning pin 505, the shielding between the transport vehicle 50 and the shield is performed. Container 30
Even if there is a slight horizontal deviation between them, the positioning pin 505 is easy to fit into the positioning hole 307, and while the positioning pin 505 fits into the positioning hole 307, the gap between the two. The displacement is corrected, and finally, the shielding container 30 is accurately positioned and mounted on the carrier 50.

In this state, the engagement between the container hanger 46 and the shielding container 30 is released by the twist lock opening / closing device 47, and the container hanger 46 is raised and retracted by the container hanger lifting mechanism 44. Then, the transport carriage 50 with the shielding container 30 placed on the upper surface is moved along the traveling rails 403 and 600 and transported to the place where the waste is to be placed in the buried facility 60.

When the carrier 50 stops at the place where the waste is to be placed in the buried facility 60, the operation of opening the RC lid 601 of the buried facility 60 located below the shielding container 30 placed on the carrier 50 is performed. Do. That is, the trolley 560 is moved along the traversing rail 502 by moving the chain 561 by the electric motor 564 of the horizontal moving mechanism 56 for detaching and attaching the lid, thereby removing the RC lid 6.
The lid removal / removal hanger 52 is positioned above the lid 01 together with the trolley 560 of the lid removal / removal hanger elevating mechanism 54 and the lid removal / removal hanger horizontal movement mechanism 56.

Next, the motor 540 of the lifting / lowering mechanism 54 for lifting and removing the lid removes the lifting shaft 543 together with the lifting tool 52 for removing and attaching the lid.
21 is fitted into the twist lock hole 240 of the twist lock metal 24 of the RC lid 601. Then, the twist lock 521 is engaged with the twist lock hardware 24 by the twist lock opening / closing mechanism 53, and the lid attaching / detaching hanging tool 52 and the RC
After connecting the lid 601, the lid removing / hanging hanging tool 52 in a state where the RC lid 601 is hung is raised by the lid attaching / detaching hanging tool lifting / lowering mechanism 54, and is stored in the hanging tool storage guide 503.

Subsequently, the trolley 560 is moved in the horizontal direction by the horizontal moving mechanism 56 for the lid-removing / removing device, and the lid-removing / removing device 52 is retracted to the side together with the RC lid 601. At this time, since the lid attaching / detaching hanging tool 52 is stored in the hanging tool storage guide 503, the movement in the horizontal direction is restricted, and the hanging tool 52 swings in the horizontal direction with the movement of the trolley 560. The transport is performed with the RC lid 601 suspended smoothly.

In this state, the pair of doors 301 is horizontally opened in a direction away from each other by the door opening / closing mechanism 32 of the shielding container 30. Thereby, the shielding container 30
Since the path for lowering the waste body 23 into the burying facility 60 is secured, the waste body hanger 34 in a state where the waste body 23 is hung is lowered by the waste body hanger elevating mechanism 36.

When the waste body 23 is fixed at a predetermined position of the buried facility 60, the twist lock opening / closing mechanism 35
Thus, the engaged state between the waste body hanging tool 34 and the waste body 23 is released, the waste body hanging tool elevating mechanism 36 raises the waste body hanging tool 34, and the shielding container 30
Put back inside. Next, the opening / closing door 301 is closed, the trolley 560 is horizontally moved, and the lid-removing hanging tool 52 with the RC lid 601 suspended is positioned above the opening of the buried facility 60. By lowering the detachable hanging tool 52, the RC
The lid 601 is fitted.

Subsequently, the engagement between the lid removing / removing hanger 52 and the RC lid 601 is released by the twist lock opening / closing mechanism 53, and the lid removing / removing hanger 52 is raised by the lid removing / removing hanger elevating mechanism 54. After being stored in the hanger storage guide 503, the transport trolley 50 is returned to the shielding container transfer crane 40 side, the shielding container 30 on the transport trolley 50 is unloaded by the shielding container transfer crane 40, and the waste In preparation for carrying in the next shielding container 30 in a state where 23 is stored.

As described above, in the hot cell, the waste 23 stored in the shielding container 30 is removed from the burial facility 6.
It is smoothly set within 0. In this case, the waste body 23 is stored in the shielding container 30 until the waste body 23 is transferred to a position above the stationary place of the burying equipment 60. Further, the work of attaching and detaching the RC lid 601 at this stationary place is carried out by the transport vehicle. 50 shielding structure 501 and the shielding container 30
Since the work of placing the waste body 23 inside the buried facility 60 is performed via the shielding structure 501, the waste body 23
Is reliably transferred from the hot cell into the burying facility 60 and set in an environment where it is isolated from the outside and sufficiently protected from radiation.

Further, positioning guides 342 formed on both end surfaces of the hanging member main body 340 of the waste body hanging member 34 are fitted into the guide rails 303 in the container main body 300 and the guide rails 607 of the burying equipment 60 to smoothly guide them. Therefore, when the waste body hanging tool 34 moves up and down in the shielding container 30 or the buried facility 60, it is guided in the vertical direction without swinging in the horizontal direction.

Similarly, the positioning guides 605 formed on both end surfaces of the RC lid 601 are guided by being fitted into the guide rails 606 of the step portion 604 of the buried facility 60. The lid 601 does not swing in the horizontal direction, and the RC lid 601 can be raised and lowered smoothly.

Further, the shielding lid 5 of the shielding structure 501
00, or between the RC lids 601 of the buried facility 60,
Since shielding backup materials 504 and 608 are provided, respectively, between shielding lids 500 or RC lid 6.
01, sufficient shielding performance is ensured, and only by attaching and detaching one shielding lid 500 or RC lid 601, the minimum area required for the operation is opened, and the stationary work of the waste body 23 is performed. Can be performed smoothly.

Further, the shielding container transfer crane 40
Is configured so that it can be used for both the operation of transferring the shielding container 30 and the operation of attaching and detaching the shielding cover 500 of the transport trolley 50, so that the configuration of the burying system is simplified accordingly.

Further, a lifting mechanism 36 for lifting the waste body of the shielding container 30 includes an electric motor 360, a gear box 361, a rotating drum 362, and a gear box 3 on the upper surface of the container body 300.
Since the 63 and the rotating drum 364 are installed, the maintenance of the waste lifting device 36 can be performed in a state in which the maintenance is shut off from the inside of the container main body 300, and even if the waste 23 is stored in the container main body 300. Radiation protection is ensured.

In this case, a through hole 302 for inserting the lifting wire rope 365 is formed on the upper surface of the container main body 300, but the hanging body 340 of the waste hanging apparatus 34 has a sufficient shielding ability. At the same time, an auxiliary shield 305 is provided on the inner surface of the container body 300 corresponding to the upper stop position of the hanging tool body 340, and the lifting wire rope 36
Since the auxiliary shielding body 306 is provided in a state of covering the rotating drums 362 and 364 connected to the fifth, radiation shielding is surely performed.

Further, the horizontal moving mechanism 56 for the attachment / detachment / removal of the lid of the transport carriage 50 includes a sprocket 562 and a transmission mechanism 563.
In addition, since the motor 564 is installed on the outer end face of the shielding structure 501, maintenance of the hanging / moving device 56 for detaching and attaching the lid can be performed in a state where the maintenance is interrupted from the inside of the shielding structure 501. At this time, the insertion hole of the chain 561 wound around the sprocket 562 is inserted into the shielding structure 501.
However, since the auxiliary shielding body 568 is provided so as to cover this hole, sufficient shielding performance is ensured.

As described above, according to the present embodiment, the shielding container transfer crane 40 is provided adjacent to the buried facility 60, and moves on the buried facility 60 by the shielding container 3.
Since the transport carriage 50 is mounted with zeros, the space above the burying equipment 60, which needs to be secured at the time of placing the waste body, can be minimized. Therefore, when burying the waste body 23 using a tunnel or the like, it is not necessary to secure extra space as compared with the case where the crane moves above the burying equipment 60, and an economical and rational configuration is achieved. can do. In this embodiment, the buried facility 60
As the closing lid 601 for closing the lid, the description has been made using the RC lid. However, the present invention is not limited to this. For example, if the material of the lid can achieve the intended radiation shielding performance and the strength of the lid,
Anything is fine.

[0077]

According to a first aspect of the present invention, there is provided a shielding container for storing a radioactive waste body, and the shielding container is placed on an upper surface.
And a transfer vehicle that runs on the buried facility, and transfer means for mounting the shielding container on the transfer vehicle, wherein the shielding container is provided at the lower part of the container body with an openable and closable door, which can be opened and closed. And a waste body hanging device that engages with the radioactive waste body is provided in the container body so as to be able to move up and down, and the waste body hanging device is configured to dispose the waste body hanging device up and down. While the body suspender elevating mechanism is provided, the waste body suspender is provided with a waste body engaging / disengaging mechanism for engaging and disengaging the engaging portion of the waste body suspender with the radioactive waste body. , The lower part of the shielding structure is opened,
A shielding lid is detachably provided on an upper part of the shielding structure, and inside the shielding structure, a lid attaching / detaching hanging tool which engages with a closing lid for closing the buried facility is vertically movable and horizontally movable. In addition to the above, the lid-removing hanger, the lid-removing hanger elevating mechanism for elevating the lid-removing hanger and the lid-removing hanger horizontal moving mechanism for horizontally moving the lid-removing hanger are provided. On the other hand, on the other hand, the lid detaching / hanging device is provided with a closing lid engaging / disengaging mechanism for engaging / disengaging the engaging portion of the lid attaching / detaching hanging component with the closing lid, and the transfer means comprises the shielding container. A container hanger for lifting and lowering the container hanger is provided on the container hanger, and a container hanger for horizontally moving the container hanger. While the horizontal movement mechanism is provided respectively In the container hanger, since the engagement portion of the container hanger is characterized in by comprising engaging disengaging shielded container engaging and disengaging mechanism is provided on the shielding container,
The engaging portion of the waste body hanging tool is engaged with the radioactive waste body by the waste body engaging / disengaging mechanism, and the radioactive waste body is stored together with the waste body hanging tool in the container body of the shielding container by the waste body hanging tool elevating mechanism, With the opening / closing door opening / closing mechanism closing the opening / closing door at the lower part of the container body, the shield hanging container engaging / disengaging mechanism of the transfer means engages the engaging portion of the container hanging tool with the shielding container, and the container lifting / lowering mechanism The shielding container is transferred together with the container hanging device by the lifting device horizontal moving mechanism, and the shielding container is placed on an opened portion of the upper surface of the transport vehicle with the shielding lid removed in advance, and the transport vehicle is buried in the facility. To a predetermined position, and the engaging portion of the hanging device for attaching and detaching the lid is engaged with the closing lid of the burying equipment by the mechanism for engaging and disengaging the closing cover of the transporting trolley. By moving mechanism In a state where the closing lid is lifted together with the hanging device for attaching and detaching the lid and retracted in the horizontal direction, the lower opening and closing door of the shielding container located above the portion where the closing lid is removed and opened is opened and closed. Opened by the opening and closing mechanism, the radioactive waste body is lowered by the waste body lifting device elevating mechanism and fixed at a predetermined position of the buried facility, so that the radioactive waste body is buried in the buried facility in an environment where radiation shielding is sufficiently performed. , It can be safely, securely and densely transported and placed. In this case, since the transfer means is provided adjacent to the buried facility and moves on the buried facility, it is a transport trolley in which a shielding container in which a radioactive waste body is stored is placed on the upper surface. The space above the buried facilities, which needs to be secured during body placement work, can be minimized. Therefore, when burying radioactive waste using a tunnel or the like, there is no need to secure extra space compared to when a crane for transporting radioactive waste moves above the burial facility, making it economical and economical. A reasonable configuration can be adopted.

According to a second aspect of the present invention, the waste body lifting device elevating mechanism comprises a mechanism body installed outside the container body and a lifting rope connecting the mechanism body and the waste body lifting device. Since the mechanism body other than the lifting rope of the waste body lifting device elevating mechanism connected to the waste body hanging device is installed outside the container body of the shielding container, maintenance of the mechanism body is It can be performed in a state of being isolated from the inside of the container body, and even if radioactive waste is stored in the container body, radiation can be reliably protected.

The third aspect of the present invention is characterized in that the waste hanging member has a sufficient shielding ability.
Even if the radioactive waste is hung below the waste hanger by a waste hanger with sufficient shielding capacity,
The radiation emitted from the radioactive waste can be reliably shielded.

A fourth aspect of the present invention is characterized in that a guide means for vertically guiding the waste body hanging tool is provided between the waste body hanging tool and the burying facility.
The guide means provided between the waste body hanging tool and the buried facility guides the waste body hanging tool vertically along the buried facility so that the radioactive waste can be guided smoothly. It can be securely placed in the interior.

A fifth aspect of the present invention is characterized in that positioning means for placing the shielding container at a predetermined position of the transporting vehicle is provided between the shielding container and the transporting vehicle. By positioning the shielding container at a predetermined position of the transport vehicle by the positioning means provided between the shield container and the transport vehicle, the radioactive waste in the shield container is transported through the transport vehicle into the burial facility. The radioactive waste can be smoothly lowered together with the waste suspender without any trouble in lowering the radioactive waste when the radioactive waste is fixed.

According to a sixth aspect of the present invention, a horizontal movement mechanism for a hanging device for attaching and detaching a lid is connected to a chain driving mechanism installed outside a shielding structure, and between the chain driving mechanism and the hanging device for attaching and detaching a lid. And a chain drive mechanism other than the chain of the lid removal / attachment hanger horizontal movement mechanism connected to the lid removal / attachment hanger outside the shielding structure of the transport trolley. By installing the chain drive mechanism, maintenance of the chain drive mechanism can be performed in a state in which it is isolated from the inside of the shielding structure, and work can be performed with sufficient shielding performance.

A seventh aspect of the present invention is characterized in that a guide means for vertically guiding the closing lid is provided between the closing lid and the burying equipment. By guiding the closing lid vertically in the buried facility by the guide means provided between the facility and the facility, the closing lid of the buried facility can be detached smoothly and reliably.

The eighth aspect of the present invention is characterized in that a shielding backup material is provided between the closing lids of the buried facility or between the shielding lids of the shielding structure. Alternatively, the shielding backup material provided between the shielding lids of the shielding structure can reliably shield the space between the closing lids of the buried facilities or the shielding lids of the shielding structure. In addition, these shield backup materials can secure the minimum space required for transporting radioactive waste by opening and closing only one closing lid or shielding lid, and open the extra space. And it is easy to implement radiation shielding measures.

A ninth aspect of the present invention is characterized in that the container hanger also serves as a hanger to be engaged with the shielding lid. Therefore, the container hanger can be used not only for the shielding container but also for the shielding lid. By engaging, the same hanging device can be used for both transfer of the shielding container and attachment and detachment of the shielding lid, simplifying the configuration of the burial system, and constructing a rational and economical burial system. can do.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a front view of the shielding container transfer crane.

FIG. 5 is a side view showing a state where the container hanging tool of FIG. 4 is fitted to a traveling vehicle.

FIG. 6 is a side view showing a state where the container hanging tool of FIG. 4 is lowered from the traveling carriage.

FIG. 7 is a front view of the shielding container.

FIG. 8 is a plan view of FIG. 7;

9 is a cross-sectional view of FIG. 8 as viewed from the side.

FIG. 10 is a sectional view of a lower opening / closing door portion of the shielding container.

FIG. 11 is a cross-sectional view of the transfer cart as viewed from the front.

FIG. 12 is a cross-sectional view of FIG. 11 as viewed from the side.

FIG. 13 is a plan view of the transport vehicle shown in FIG.

FIG. 14 is a plan view of the transport cart of FIG. 12 excluding a ceiling portion.

FIG. 15 is a plan view of the transporting vehicle of FIG.

FIG. 16 is a perspective view of a hanging member engaging / disengaging portion.

FIG. 17 is a perspective view of a conventional buried facility.

FIG. 18 is a cross-sectional view of a buried facility using a conventional tunnel.

[Explanation of symbols]

 Reference Signs List 23 Radioactive waste (waste body) 30 Shielding container for placing waste body (shielding container) 300 Container body 301 Opening / closing door 32 Opening / closing door opening / closing mechanism 34 Waste hangers 341, 461, 521 Twist lock (engaging portion) 35 Twist lock Opening / closing mechanism (waste body engaging / disengaging mechanism) 36 waste body lifting / lowering mechanism 365 lifting / lowering wire rope (raising / lowering rope) 40 shielding container transfer crane (transfer means) 42 container lifting / lowering horizontal movement mechanism 44 container lifting / lowering mechanism 46 Container hanging tool 47 Twist lock opening / closing mechanism (shield container engaging / disengaging mechanism) 50 Carriage cart 500 Shielding lid 501 Shielding structure 504, 608 Shielding backup material 52 Lid removing / attaching hanging tool 53 Twist lock opening / closing mechanism (Covering lid engaging / disengaging mechanism) 54 Lifting / lowering mechanism for hanging / removing hanging device for lid 56 Horizontal moving mechanism for lifting / removing hanging device for lid 561 Chain 60 Buried facility 601 RC lid (blocking lid)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G21F 9/36

Claims (9)

(57) [Claims] 1. A radioactive waste burying system for lifting and transporting a radioactive waste body and placing it in a burying facility, comprising: a shielding container for storing the radioactive waste body, and the shielding container placed on an upper surface; And a transfer vehicle that runs on the buried facility, and transfer means for mounting the shielding container on the transfer vehicle, wherein the shielding container is provided at the lower part of the container body with an openable and closable door, which can be opened and closed. A door opening and closing mechanism is provided in
And while the waste body hanging tool that engages with the radioactive waste body in the container body is provided so as to be able to move up and down, the waste body hanging tool,
While a waste body lifting device elevating mechanism for raising and lowering the waste body hanging device is provided, the waste body hanging device has a waste body engaging / disengaging mechanism for engaging and disengaging the engaging portion of the waste body hanging device with the radioactive waste body. Wherein the lower part of the shielding structure is opened, and a shielding lid is detachably provided on the upper part of the shielding structure,
And inside the shielding structure, while a lid detachable hanging device that engages with the closing lid that closes the buried facility is provided so as to be able to move up and down and horizontally movable, and the lid detachable hanging device,
While a lid detachable hanging device lifting mechanism for raising and lowering the lid detaching hanging device and a lid detaching and hanging device horizontal movement mechanism for horizontally moving the lid detaching and attaching device are provided, A closure lid engaging / disengaging mechanism is provided for engaging and disengaging the engaging portion of the lid attaching / detaching hanging implement with the closing lid, and the transfer means is capable of moving the container suspending implement engaging with the shielding container up and down and horizontally. The container hanger is provided so as to be movable, and the container hanger is provided with a container hanger lifting mechanism for raising and lowering the container hanger and a container hanger horizontal movement mechanism for horizontally moving the container hanger, respectively. And a shielding container engaging / disengaging mechanism for engaging and disengaging the engaging portion of the container hanging tool with the shielding container. 2. The waste body lifting device lifting mechanism comprises a mechanism body installed outside the container body, and a lifting rope connecting the mechanism body and the waste body lifting device. Item 8. The radioactive waste burying system according to Item 1. 3. The radioactive waste burying system according to claim 1, wherein the waste suspender has a sufficient shielding ability. 4. The radioactive waste according to claim 1, wherein a guide means for vertically guiding the waste body hanger is provided between the waste body hanger and the buried facility. Body burial system. 5. A positioning device for mounting said shielding container at a predetermined position of said transporting vehicle between said shielding container and said transporting vehicle. Radioactive waste burial system. 6. A horizontal movement mechanism for a hanging device for detaching and attaching a lid, comprising a chain drive mechanism installed outside the shielding structure, and a chain connected between the chain driving mechanism and the hanging device for detaching and attaching the lid. Claims 1 and 2, characterized in that
The radioactive waste burying system according to claim 3, 4, or 5. 7. The device according to claim 1, wherein a guide means for vertically guiding the closing lid is provided between the closing lid and the burying equipment. Radioactive waste burial system. 8. The shielding backup material according to claim 1, wherein a shielding backup material is provided between the closing lids of the buried facility or between the shielding lids of the shielding structure. Radioactive waste burial system. 9. The container hanger also serves as a hanger to be engaged with the shielding lid.
The radioactive waste burying system according to 5, 6, 7 or 8.