JPH11352295A - Suspension device of radioactive waste and burying equipment provide therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry waste into burying equipment safely, surely and tightly and lay under an environment, where radiation shield is sufficiently provided. SOLUTION: Burying equipment 40 making a suspension shield body 10 position above a radioactive waste 6, makes a suspension body 13 approach to the radioactive waste body 6 in the state opening an opening door 11 by a door opening mechanism 20, makes the suspension body 13 couple in the radioactive waste body 6 with a suspension detaching mechanism 30, and makes the radioactive waste body 6 draw and contain in the suspension shield body 10 together with the suspension body 13. After closing the opening door 11 with the door opening mechanism 20, the suspension shield body 10 is lifted up and carried. When it reaches the objective position, the opening door 11 is opened, the radioactive waste body 6 is pulled out, the suspension body 13 is removed from the radioactive waste body 6, and the radioactive waste body 6 is laid at a specified position.

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 hanging device for radioactive waste that is safely, reliably and densely stacked inside (hereinafter, referred to as stationary), and a burial facility provided with the hanging device.

[0002]

2. Description of the Related Art In radioactive waste burial facilities, liquids and fine sludge contaminated with radioactive materials, metal chips and the like (hereinafter referred to as waste) are transferred to drums and the like together with solidified materials such as cement and asphalt. It is in a form that can be buried by mixing into a container. These drums and other containers are stacked in a rectangular parallelepiped hole made of reinforced concrete and buried in the ground, for example, about 8 × 5 rows × 8 steps and buried in the ground. A container such as a drum containing this type of radioactive waste is generally shown in FIG.
It is buried in such a way that the burial facility as shown in Fig. 1 is finally formed. That is, a reinforced concrete structure 1 is constructed in a concave terrain formed by excavating the ground, and a space (hereinafter, referred to as a section) 2 in which a rectangular waste is to be placed.
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, and 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 placed in the section 2, a concrete lid (hereinafter, referred to as an RC lid) is provided in an opening above the section 2.
Is installed, but after a predetermined amount of the container 3 is fixed in the section 2 and the cement-based filler 4 such as mortar is densely filled, the installation part of the RC lid is used after removing the RC lid. ,
By pouring concrete in place, the opening of the section 2 is finished. Further, at least four circumferences 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 the burying facility having such a structure, when the container 3 such as a drum can is fixed 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 crane, and are densely and densely packed in the section 2. Stack on. This stationary work is equipped with a telescopic type mast structure for suppressing the cause of deterioration of the stationary accuracy such as load deflection due to the inertia force at the time of cargo handling and deviation of the suspended load center,
It is performed by a high-precision automatic crane that guarantees high operation accuracy. 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.

[0004]

However, in the above-mentioned conventional technology, for example, a waste body in a state of high radiation dose such that no human is allowed to approach or a waste body to which radiation shielding has been performed to some extent. Even in such a case, the following problem arises in the case where the approach is allowed only for a very short time from the viewpoint of protection from radiation exposure. (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 humans to approach to fill the filling material into the section 2 and backfill the buried facility with soil, etc. A lid such as an RC lid having a shielding function is required at the opening of the compartment 2 after the completion in order to reduce the amount of radiation emitted from the disposed waste body. Therefore, when handling the waste body described at the beginning, the RC lid installation work after the waste body placement must be performed by a measure that does not require human assistance. (3) Since most of the radiation emitted from the waste has a straight-line property, the lid such as the RC lid for the purpose of radiation dose reduction is a single lid with no seam (in this case, Makes the lid heavy and difficult to handle)
Alternatively, if there is a seam, for example, a lid having a seam shape that fits in an uneven shape (in this case, it is not possible to remove only the RC lid at an arbitrary position, so it is necessary to remove an extra lid. Yes, the surrounding radiation condition is unnecessarily high) or step joint type (stepwise)
(The same problem as the above-mentioned uneven lid)
A method in which the joints between the lids are linear, but a shield such as an iron material is arranged on the back of the joint (in this case, the installation efficiency, that is, “the total amount of waste buried in section 2” Volume / internal space of section 2), or a lid or the like which is arranged in such a manner that 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. A problem arises with the structure of a conventional RC lid. (4) It is considered that the radiation dose state can be reduced by adding sufficient shielding to the waste, but 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 to this waste reduces the efficiency of emplacement, and thus the disposal cost of waste (= total cost of construction and operation of buried facilities / total volume of buried waste) Will lead to an increase.

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 developed.

(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 of the disposal of the waste body, a shielding material surrounding the waste body is provided so that the waste body cannot be seen from outside the hanging device. It was a hanging tool. This lifting tool is used to lift the waste that is transported while being stored in the shielding container of the truck with a crane,
The structure was such that the lower surface of the hanger was opened inside the hanger shield in a double-opened manner, and this opening could be opened after being connected to the shielding container of the truck. In addition, this opening and closing operation,
In order to eliminate malfunctioning events due to the failure of the power generation source, weights, pulleys, wires, etc., are operated without using a power source such as an electric motor so that the crane can be operated with the minimum lifting power required for lifting equipment. The mechanism uses a power transmission member such as a rope. (B) Without complicating the crane structure and the buried facility structure,
The crane must be able to handle the wastes and the lids such as RC lids that need to be handled by the same lifting device, and the shielding of the lids such as the RC lids should be considered. In order to eliminate the need for human intervention in the work and to place the waste compacts densely in the compartment, positioning guide rails are installed on the buried facilities, and the guide rails are placed on the lids such as RC lids and the hanging equipment side with the guide rails. Each of the guide rails is provided with a positioning guide boss, and various guide rails can be used for various purposes. (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 a high operation accuracy was required, according to the present invention, the effect of the positioning guide rail provided on the buried facility side and the positioning guide boss provided on the hanging tool main body beam. Thereby, the accuracy of the crane used can be made general purpose.

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.
In an environment where radiation shielding has been sufficiently applied, it can be safely, securely and densely transported and placed,
An object of the present invention is to provide a suspending device for radioactive waste having a structure that is rational and economical, and a burying facility equipped with the suspending device.

[0008]

A first aspect of the present invention is a hanging apparatus for lifting and transporting a radioactive waste body and placing the same in a buried facility, comprising a hanger shield for accommodating the radioactive waste body. An opening / closing door provided at the lower part of the hanging device shield so as to be openable and closable, a door opening / closing mechanism provided at the opening / closing door, and opening and closing the opening / closing door; The hanging tool main body engages with the radioactive waste, and a hanging tool engaging / disengaging mechanism provided on the hanging tool main body for engaging and disengaging the hanging tool main body with the radioactive waste. In the hanging device according to the first aspect, when lifting the radioactive waste, the hanging device shield is positioned above the radioactive waste and the opening / closing door is opened by the door opening / closing mechanism. Is brought close to the radioactive waste body, the hanging tool body is engaged with the radioactive waste body by the hanging tool engagement / disengagement mechanism, and this radioactive waste body is drawn into the hanging tool shield together with the hanging tool body to suspend the radioactive waste body. After the door is closed and closed by the door opening / closing mechanism, the lifting / closing door is lifted by the door opening / closing mechanism and transported. The radioactive waste is pulled out of the radioactive waste, and the hanging tool main body is separated from the radioactive waste by the hanging tool engaging / disengaging mechanism, and the radioactive waste is fixed at a predetermined position. Thereby, the radioactive waste can be handled smoothly in a state where the radioactive waste is surrounded by the hanger shield and securely shielded.

According to a second aspect of the present invention, the opening / closing door is configured to open and close inside the hanger shield. In the hanging device according to the second aspect, when the radioactive waste is stored, lifted and transported inside the hanging device shield, even if the opening and closing door is opened and closed, the opening and closing door is outside the hanging device shield. It does not protrude to the side, so the opening / closing door does not hinder the stationary work of the radioactive waste, it can work smoothly, and the hanging equipment shield is connected to a shielding container such as a truck After that, the opening / closing door can be opened / closed, and work can be performed in a state where the shielding effect is sufficiently ensured.

According to a third aspect of the present invention, a door opening / closing mechanism is provided on the hanger main body in the hanger shielding body so as to be able to move up and down, and the door opening / closing mechanism is provided on the door opening / closing weight. A door opening / closing rope for opening and closing the door, and a pulley provided on the hanging device shield and supporting and guiding the door opening / closing rope. In the hanging device according to the third aspect, when the hanging member body supporting the door opening / closing weight from below is lowered, the door opening / closing weight is also lowered, and the door supported and guided by the pulley. The opening / closing door is opened by the opening / closing rope, and when the hanging device main body is lifted, the door opening / closing weight is lifted, and the opening / closing door is closed. Thus, the opening / closing door can be smoothly opened / closed only by the lifting / lowering operation of the hanging tool main body.

[0011] Claim 4 of the present invention is directed to Claims 1 and 2,
Or a buried facility provided with the radioactive waste body hanging device according to 3, wherein the hanging device main body engaging with the radioactive waste body is configured to be detachable from a lid closing a buried space. . In the buried facility equipped with the radioactive waste body hanging device according to the fourth aspect, since the hanging device main body can be disengaged from the radioactive waste body as well as the lid, the same hanging device mechanism can be used. In addition, the lid can be opened and closed and the radioactive waste can be fixed. Thereby, the configuration of the embedded system can be made rational and economical.

[0012] Claim 5 of the present invention relates to an inner wall surface of the buried facility,
A guide means for vertically guiding the radioactive waste and the hanging tool body is provided between the radioactive waste and the hanging tool body. In the buried facility provided with the radioactive waste body hanging device according to the fifth aspect, the radioactive waste or the suspended body is guided by the guide means provided between the inner wall surface of the buried facility and the radioactive waste body and the hanging body. By guiding the tool body along the inner wall surface of the buried facility, the radioactive waste and the hanging tool body are guided smoothly and reliably. This allows
The crane that lifts the radioactive waste and the hanging tool main body can be made a general-purpose one instead of a high-precision one, and the mechanism that guides the radioactive waste and the hanging tool main body can also be used for the same purpose. Can be simplified.

According to a sixth aspect of the present invention, there is provided an inner wall surface of the buried facility,
A guide means is provided between the hanging member shield and the lid to guide the hanging member shield and the lid in the vertical direction. In the underground facility provided with the radioactive waste body hanging device according to claim 6, the hanging device shield or the guide is provided between the inner wall surface of the facility and the hanging device shield and the lid. By guiding the lid along the inner wall surface of the buried facility, the hanger shield is securely engaged with the inner wall surface of the buried facility and positioned, and the lid smoothly opens and closes the buried space. Thereby, the accuracy of the crane can be made general-purpose, and the mechanism for guiding the hanger shield and the lid can be used as well, and the configuration of the burying system can be rationalized accordingly.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and is a sectional view of a buried facility as viewed from the front, and FIG.
3 is a cross-sectional view of the buried facility as viewed from the side, and FIG.
5 is a cross-sectional view of the hanging device viewed from the front, FIG. 5 is a plan view of FIG. 4, FIG. 6 is a side view of FIG. 4, and FIG. In these figures, reference numeral 10 denotes a rectangular tubular hanging device shield, and an opening for carrying out and carrying in the substantially rectangular solid waste 6 located at a lower portion of the hanging device shield 10 is: An opening / closing door 11 is provided which pivots upward inside the hanging device shield 10 and opens like a double door. The door 11 has a door opening / closing mechanism 2 that opens and closes the door 11.
0 is linked.

A lifting wire rope 12 for raising and lowering the hanger shield 10 is connected to the upper surface of the hanger shield 10. Further, a rectangular plate-shaped hanging member body 13 which also functions as a shielding member is provided inside the hanging member shield 10 so as to be able to move up and down.
An elevating wire rope 14 for elevating and lowering 3 is inserted through the upper opening of the hanger shield 10 and connected thereto.

A door opening and closing mechanism 20 for opening and closing the opening and closing door 11
Is a frame-shaped door opening / closing weight 21 provided above and below the hanging tool main body 13 in the hanging tool shield 10, and the door opening / closing weight 21 is provided to open and close the opening / closing door 11. A door opening / closing wire rope 22, a top pulley 23 provided on the upper surface of the hanging device shield 10 and supporting and guiding the door opening / closing wire rope 22, and a top pulley 23 provided below the hanging device shield 10 and And a lower pulley 24 that supports and guides the wire rope 22.

Guide bosses 15 are provided at four corners (both ends of a pair of side surfaces orthogonal to the longitudinal direction of the hanger main body 13) of the hanger main body 13.
Below, is provided an elliptical cone-shaped twist lock 32 supported by a lock shaft 31 of the hanging member engaging and disengaging mechanism 30.
The twist lock 32 is connected to the hanger main body 13.
The lock shaft 31 rotates 90 degrees around the axis of the lock shaft 31 by a link mechanism or the like (not shown) using a motor or the like as a power source installed on the upper surface of the lock shaft 31.

Further, hanging metal fittings 7 to be engaged with the above-mentioned twist lock 32 are provided at the upper four corners of the radioactive waste body 6, and these hanging metal fittings 7 also serve as guide bosses. . As shown in FIG. 7, the hanging metal fitting 7 has a long hole 8 formed on the upper surface, and the elliptical cone-shaped twist lock 32 is inserted into the long hole 8 and rotated by 90 degrees. Thereby, the hanging metal 7 and the twist lock 32 are engaged with each other. Note that guide bosses 7 having the same configuration as the above-mentioned hanging metal fittings 7 are provided at the four lower corners of the radioactive waste body 6.

The burying facility 40 for burying the radioactive waste 6 is a square-shaped structure constructed of a concrete structure. Further, as shown in FIG. 1, a step portion 43 on which the first-layer RC lid 50 can be placed is provided above the inner wall surface 42 of the burying facility 40 which is parallel to the longitudinal direction of the radioactive waste body 6. As shown in FIG. 3, the first layer R is provided on the inner wall surface 44 and the partition 41 of the buried facility 40 which are orthogonal to the longitudinal direction of the radioactive waste body 6.
A step portion 45 that supports the C lid 50 and the second layer RC lid 51 is formed.

The first and second layers RC lids 50 and 51
Are arranged alternately so that their joints are not at the same location in the upper and lower layers. In addition, the first
On the upper surfaces of the layers and the second-layer RC lids 50 and 51, at positions corresponding to the twist locks 32 provided at the hanging body 13, hanging members 52 having the same structure as the hanging member 7 are provided, respectively. Have been.

The inner wall surface 44 and the partition wall 4 of the buried facility 40
1 is a guide boss (suspension fitting) 7 of the radioactive waste 6
And a guide rail 46 that engages with the guide boss 15 of the hanging body 13 to support the radioactive waste body 6 and the hanging body 13 in the horizontal plane in the left-right and front-rear directions, and guides the up-down direction. Is laid. The guide means is constituted by the guide bosses 7 and 15 and the guide rail 46.

Guide bosses 16 are provided at the lower four corners (both ends of a pair of side surfaces perpendicular to the longitudinal direction of the hanger shield 10) of the hanger shield 10. Further, a guide boss 53 is provided on a pair of side surfaces orthogonal to the longitudinal direction of the first layer and the second layer RC lids 50 and 51, respectively.
53 'are provided. On the other hand, the guide bosses 16, 53, 53 'are engaged with the inner wall surface 44 of the buried facility 40 and each step portion 45 of the partition wall 41, and the hanging device shield 1
A guide rail 47 that supports the 0 and each of the RC lids 50 and 51 in the horizontal plane in the left and right and front and back directions and guides them in the vertical direction is laid in the vertical direction. The guide bosses 16, 53, 53 'and the guide rail 47
The guide means is constituted by these.

In FIG. 1, reference numeral 62 denotes a crane running rail laid on the upper surface of the buried facility 40. The crane running on the crane running rail 62 allows the hanging tool shield 10 and the hanging tool body 13 to be moved. It can be raised and lowered and moved horizontally. The operation of the crane is performed by remote control using an ITV or the like.

Next, a description will be given of a case where the radioactive waste body 6 is fixed in the buried facility in the buried facility provided with the hanging device configured as described above. First, the first-layer RC lid 50 above the place where the radioactive waste 6 is to be placed is removed using the above-mentioned hanging device.

That is, the crane is operated without raising / lowering the lifting tool main body 13 to wind up the lifting tool shield 10 via the lifting wire rope 12. As a result, the hanger shield 10
And the lifting tool main body 13 are spaced apart from each other, whereby the door opening / closing weight 21 of the door opening / closing mechanism 20 is lowered with respect to the lifting tool shield 10 by its own weight. Each pulley 23, 2 is connected to the opening / closing weight 21 and
The lower opening / closing door 11 in the hanging device shield 10 is rotated upward through the door opening / closing wire rope 22 supported and guided by the door 4 to open like a double door.

When the hanging device shield 10 is further rolled up, the hanging device body 13 continues to descend even after the lowering of the door opening / closing weight 21 is stopped. Only the hanger main body 13 will appear.
Then, the first layer RC lid 5 from which the lifting tool body 13 is to be removed via the lifting wire rope 14 by operating the crane 5.
Place on top of 0. At this time, the twist locks 32 at the four corners of the hanging member main body 13 are inserted while being guided into the elongated holes 8 of the hanging members 52 of the first layer RC lid 50. Therefore, in this state, when the lock shaft 31 is rotated by 90 degrees by operating the electric motor of the suspender engaging / disengaging mechanism 30, the twist lock 32 and the suspender 52 are engaged, and the suspender body 13 and the first The layer RC lid 50 is firmly connected.

In this state, the lifting tool main body 13 is raised by the lifting wire rope 14.

Then, the lifting tool body 13 lifted in this manner is further transferred in a horizontal direction and lowered to a predetermined place. As a result, the first layer RC lid 50 comes into contact with the mounting place. Next, the twist lock 32 is rotated by 90 degrees by the hanging member engagement / disengagement mechanism 30 to release the engagement state between the first layer RC lid 50 and the hanging member body 13, and then the lifting member body 13 is lifted.

By performing such an operation once or twice, the predetermined first layer RC lid 50 is removed, and the second layer RC lid 51 that needs to be removed is completely exposed. Here, the second layer RC lid 51 located at a position adjacent to the inner wall surface 42
In this case, the first-layer RC lid 50 immediately above it is completely exposed if removed by one operation, but the other second-layer RC lid 51 is removed.
In this case, it is necessary to remove a pair of adjacent first-layer RC covers 50 above the second-layer RC cover 51, and thus two operations are required.

When the first-layer RC lid 50 is removed and the target second-layer RC lid 51 is exposed, the removal of the second-layer RC lid 51 is performed in the same manner as the above-mentioned removal of the first-layer RC lid 50. Perform the same procedure as described above. That is, first, the hanger shield 10 is wound up, and the hanger main body 13 is lowered in a state where the hanger main body 13 is exposed and placed on the second layer RC lid 51.

Next, the twist lock 32 is rotated by 90 degrees to engage with the hanging member 52 of the second layer RC cover 51, and then together with the second layer RC cover 51 engaged with the hanging member body 13, the hanging member body is formed. 13 is moved up to the place where the second layer RC lid 51 is placed.

After the second-layer RC lid 51 is removed in this manner, the radioactive waste 6 that is stored and transported in the shielding container equipped with the truck to the loading position of the crane is removed.
The buried facility 4 which is lifted by the hanging device of the present embodiment.
Place within 0. That is, first, the hanging tool shield 10 is placed on the shield container by a crane,
By lowering the hanger main body 13, the door opening / closing mechanism 20 is operated, and the opening / closing door 11 is pivoted upward inside the hanger shield 10 to open in a double-opening manner. Open the upper surface.

In this case, the opening structure on the upper surface of the shielding container provided with the truck has no problem in placing the hanging device shield 10 on the shielding container, and the hanging device main body 13 from the upper surface of the shielding container is not hindered.
Any opening / closing mechanism may be used as long as the mechanism allows access to the object. However, a structure in which the upper surface of the shielding container can be opened after the hanging device shield 10 and the shielding container are vertically connected. preferable.

In this way, in a state where the hanging member shield 10 and the inside of the shielding container provided with the truck are in communication with each other, the hanging member body 13 is still lowered, so that the hanging member body 13 is moved into the radioactive waste in the shielding container. 6. As a result, the twist lock 32 of the hanging member body 13 is inserted into the elongated hole 8 of the hanging metal member 7 of the radioactive waste body 6. The waste body 6 is engaged.

Then, the lifting tool main body 13 is lifted, and the radioactive waste body 6 is lifted and pulled into the hanging tool shield 10 from the shielding container with the lifting of the hanging tool main body 13. Further, by pulling up the hanger main body 13 to an upper position inside the hanger shield 10, the door opening / closing weight 2 is lifted.
1 is lifted, and the opening / closing door 11 is rotated downward and closed.
As a result, the radioactive waste body 6 is housed in the hanging implement shield 10 and is shielded from the outside.

In this state, the lifting tool main body 13 is further raised to lift up the lifting tool shield 10 and the radioactive waste 6 engaged with the lifting tool main body 13 existing inside the lifting tool shielding body 10, thereby obtaining the above-mentioned buried facility. 40 each of the above R
The C is transported to the opening with the lids 50 and 51 removed. At this time, the lifting wire rope 12 for lifting and lowering the hanging implement shield 10 is kept in tension so as not to hinder the above-mentioned operation. Then, the hanging implement shield 10 is connected to a pair of second
It is placed on the layer RC lid 51. In this case, the guide boss 16 of the hanging implement shielding body 10 has an inner wall surface 44 and a partition wall 4.
The guide rail 47 for the second layer RC cover 51 formed on the first step portion 45 is fitted into the guide rail 47 and guided by the guide rail 47, so that it can be lowered smoothly and positioned at a predetermined position without fail. Is placed.

Next, by lowering the hanging body 13, the opening / closing door 11 is opened, and by continuing the lowering of the hanging body 13, the radioactive waste body 6 engaged with the hanging body 13 is removed. It is taken out from the hanging tool shield 10 and fixed at a predetermined position. In this case, since the guide bosses 15 and 7 formed on the hanging implement body 13 and the radioactive waste body 6 are guided along the guide rails 46 formed on the inner wall surface 44 and the partition wall 41, respectively. And the radioactive waste body 6 descends smoothly, and the radioactive waste body 6 is securely placed.

As described above, when the radioactive waste body 6 is fixed at a predetermined position, the engagement state by the twist lock 32 is released, and the hanging tool main body 13 and the hanging tool shield 10 are separated from the radioactive waste body 6. . When the operation of placing the radioactive waste body 6 by the hanging device according to the present embodiment is completed, the second-layer RC cover 51 and the first-layer RC cover 50 are sequentially placed in the embedding facility 40.
Over the opening, and close the opening. In this operation, the above-described operation for removing the RC lids 50 and 51 may be performed in the reverse order, and thus the description is omitted.

According to such a procedure, the radioactive waste 6 stored and transported in the shielding container equipped with the truck is provided.
Can be smoothly and securely fixed at a predetermined position of the buried facility 40. In this case, the radioactive waste 6
Is from the shielding container equipped with the truck to the inside of the buried facility 40,
Since it is stored and carried in the hanger shield 10, it can be transported in a safer form by being isolated from the outside.

Further, since the door 11 is opened upward inside the hanger shield 10, the door 11 does not protrude below the hanger shield 11, and in particular, a shielding container equipped with a truck. At the time of delivery work of radioactive waste 6 from
When the radioactive waste 6 is placed at the opening of the buried facility 40, the opening and closing operation of the opening and closing door 11 is performed by other equipment or each RC.
There is no hindrance to the structure of the buried facilities such as the lids 50 and 51, and there is no hindrance to the work.

Further, since the opening / closing door 11 is opened / closed by the lifting / lowering operation of the door opening / closing weight 21 of the door opening / closing mechanism 20 with the lifting / lowering of the hanging body 13, the lifting / lowering wire rope 14 for operating the hanging body 13 is moved. The opening / closing door 11 can be smoothly opened / closed only by power, without requiring a special power for the opening / closing door 11 such as a motor. The door opening / closing mechanism 20 utilizes the landing operation of the hanging implement shield 10 on a shielded container equipped with a truck, on each of the RC lids 50 and 51, or on the top end structure of the buried facility 40. A push rod may be provided extending below the hanger shield 10, and a gear mechanism that converts the pushing force of the push rod into an opening operation of the opening and closing door 11 may be used. Needless to say, the door 11 may be opened and closed using a power source such as an electric motor.

Further, the twist lock 32 of the hanging member engaging and disengaging mechanism 30 is provided not only for the hanging metal member 7 of the radioactive waste 6
The hanging members 7, 52 having the same structure are used so as to be engaged with the hanging members 52 of the respective RC lids 50, 51, and the respective hanging members 7, 52 are used.
Are arranged so as to be the same, the work of placing the radioactive waste body 6 and the opening and closing work of each of the RC lids 50 and 51 can be easily performed by the same hanging member mechanism. The configuration can be reasonably and economically constructed.

As guide means, a guide rail 46 formed on the inner wall surface 44 of the buried facility 40 and the partition wall 41 is provided.
And each guide boss 1 of the hanging body 13 and the radioactive waste 6
Guide bosses 1 having the same structure so that
Since the guide bosses 5 and 7 are used and the arrangement relationship of the guide bosses 15 and 7 is common, a single guide rail 46 is also used to guide the lifting tool body 13 and the radioactive waste body 6 when ascending and descending. And a very rational and economical configuration can be achieved.

In this case, in the present embodiment, guide bosses 7 which are also used as hanging metal fittings are provided at the upper four corners of the radioactive waste body 6, and at the lower four corners of the radioactive waste body, The guide boss 7 having the same configuration as the guide boss 7 has been described. However, even when these guide bosses 7 are not provided on the radioactive waste 6, the guide boss 15 is provided on the hanging member body 13 of the present invention. Is provided, when the guide boss 15 and the guide rail 46 are engaged with each other, it is possible to set the target densely, and the radioactive waste body 6 can be smoothly placed at a predetermined position.

In the present embodiment, the hanging metal fittings 7 provided at the upper four corners of the radioactive waste 6 are provided.
Need not necessarily be provided at this position. In short, there is no problem as long as a suspender having a suspending function that substitutes for the suspender 7 exists at a position that substitutes for the installation position. However, in this case, in order to make the entire system rational and economical, it is desirable that the RC lids 50 and 51 have the same system and arrangement.

Further, as guide means, a guide rail 47 formed on the inner wall surface 44 of the buried facility 40 and the step portion 45 of the partition wall 41, the hanger shield 10, and the respective RC lids 50 and 51 are provided.
The guide bosses 16, 53, 53 'having the same structure are used so that the guide bosses 16, 53, 53' can be engaged with the guide bosses 16, 53, 53 '. As a result, the single guide rail 47 can also serve as a guide for lifting and lowering the hanger shield 10 and the respective RC lids 50 and 51, and a rational and economical system configuration can be achieved. is there.

Further, when the opening / closing door 11 is closed, the hanging tool main body 13 is located above the hanging tool shield 10, so that the hanging tool main body 13 can be provided with a shielding function. The shielding property of the upper part of the shielding body 10 is maintained. Therefore, even in the event that a failure occurs in the electric motor for rotating the twist lock 32 of the hanging member engaging / disengaging mechanism 30 disposed on the hanging member main body 13, maintenance can be easily and safely performed. .

[0048]

According to the first aspect of the present invention, there is provided a hanger shield for accommodating a radioactive waste body, an opening / closing door provided at a lower portion of the hanger shielding body, and provided on the opening / closing door. A door opening / closing mechanism for opening and closing the opening / closing door, a hanger main body provided on the hanger shielding body so as to be able to move up and down, and engaging with the radioactive waste body; And a hanging device engaging and disengaging mechanism for engaging and disengaging the main body to and from the radioactive waste, so that when lifting the radioactive waste, the hanging device shield is positioned above the radioactive waste and a door opening and closing mechanism is provided. With the opening / closing door open, bring the hanger main body close to the radioactive waste body, engage the hanger main body with the radioactive waste body by the hanger engaging / disengaging mechanism, and suspend this radioactive waste body together with the hanger main body. Pull it into the tool shield,
After storing the radioactive waste in the hanging device shield and closing the door by the door opening and closing mechanism, the lifting device shield is lifted and transported, and when it reaches the target position, the door opening and closing mechanism is opened. By pulling out the radioactive waste from the hanger shield, and by detaching the hanger main body from the radioactive waste by the hanger engaging / disengaging mechanism, the radioactive waste is fixed to a predetermined position, thereby shielding the radioactive waste from the hanger. It can be handled smoothly in a state where it is surrounded by the body and securely shielded. Therefore, the waste can be safely, reliably and densely transported and placed in the buried facility in an environment where the radiation is sufficiently shielded.

According to a second aspect of the present invention, since the opening / closing door is configured to open and close inside the hanging device shield,
When storing, lifting and transporting the radioactive waste inside the hanging device shield, even if the door is opened and closed, the opening and closing door does not protrude out of the hanging device shield. The work can be carried out smoothly without disturbing the stationary work of the radioactive waste, and the opening / closing door can be opened / closed after the hanging equipment shield is connected to a shielding container such as a truck. Thus, the work can be performed in a state where the shielding effect is sufficiently secured.

According to a third aspect of the present invention, there is provided a door opening / closing mechanism, wherein the door opening / closing mechanism is provided on the hanger main body in the hanger shield so as to be able to move up and down, and the door opening / closing weight is provided on the door opening / closing weight. It is composed of a door opening / closing rope for opening and closing the door and a pulley provided on the hanging device shield and supporting and guiding the door opening / closing rope, so that the door opening / closing weight is supported from below. When the hanging device main body is lowered, the door opening / closing weight is lowered, and the door opening / closing door is opened by the door opening / closing rope supported and guided by the pulley. Is lifted and the opening and closing door is closed, so that the opening and closing door can be smoothly opened and closed only by the lifting and lowering operation of the hanging member main body. Therefore, no special power source is required, the opening and closing operation of the opening and closing door can be performed safely and reliably, and a very rational configuration can be achieved.

Claim 4 of the present invention is directed to Claims 1 and 2,
Or a buried facility provided with the radioactive waste body hanging device according to 3, wherein the hanging device main body engaging with the radioactive waste body is configured to be detachable from a lid closing a buried space. Therefore, since the hanging tool main body can be disengaged not only from the radioactive waste body but also from the lid, the opening / closing operation of the lid and the stationary work of the radioactive waste can be performed by the same hanging mechanism. Therefore, the configuration of the radioactive waste burying system can be made rational and economical.

According to a fifth aspect of the present invention, there is provided an inner wall surface of the buried facility,
Since the guide means for vertically guiding the radioactive waste and the hanging tool main body is provided between the radioactive waste and the hanging tool main body, the inner wall surface of the buried facility and the radioactive waste and the hanging tool main body are provided. By guiding the radioactive waste or the hanging tool main body along the inner wall surface of the buried facility by the guide means provided between them, the radioactive waste and the hanging tool main body can be guided smoothly and reliably. Therefore, the crane that lifts the radioactive waste and the hanging tool main body can be a general-purpose one instead of a high-precision one, and the mechanism that guides the radioactive waste and the hanging tool main body can also be used as a unit. The configuration can be simplified.

According to a sixth aspect of the present invention, there is provided an inner wall surface of a buried facility,
Since the guide means for vertically guiding the hanger shield and the lid is provided between the hanger shield and the lid, the inner wall surface of the buried facility and the hanger shield and the lid are provided. By guiding the hanger shield or the lid along the inner wall surface of the buried facility by the guiding means provided between them, the hanger shield is securely engaged with the inner wall surface of the buried facility to be positioned. The buried space can be smoothly opened and closed by the lid. Therefore, the accuracy of the crane can be made general-purpose, and the mechanism for guiding the hanger shield and the lid can be used as well, so that the configuration of the burying system can be rationalized.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and is a cross-sectional view of a buried facility as viewed from the front.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view of the buried facility as viewed from a side.

FIG. 4 is a cross-sectional view of the hanging device viewed from the front.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a side view of FIG.

FIG. 7 is a perspective view of a hanging member engaging / disengaging portion.

FIG. 8 is a perspective view of a conventional buried facility.

[Explanation of symbols]

 Reference Signs List 6 Radioactive waste 7 Hanger (guide boss) 10 Hanger shield 11 Opening / closing door 13 Hanger body 15, 16, 53, 53 'Guide boss 20 Door opening / closing mechanism 21 Door opening / closing weight 22 Door opening / closing wire rope 23 Top Pulley 24 Lower pulley 30 Hanging device engaging / disengaging mechanism 40 Buried facility 41 Partition wall 44 Inner wall surface 46, 47 Guide rail 50 First layer RC lid 51 Second layer RC lid 52 Hanging fitting

Claims (6)

[Claims] 1. A hanging device for lifting and transporting a radioactive waste body and placing it in a buried facility, comprising: a hanging device shield for storing the radioactive waste material; The provided door, a door opening / closing mechanism provided on the door, and a door opening / closing mechanism for opening / closing the door, and a hanging member main body provided on the hanging member shield so as to be vertically movable and engaged with the radioactive waste body And a suspender engaging / disengaging mechanism provided on the suspender main body and engaging and disengaging the suspender main body with the radioactive waste body. 2. The hanging device for a radioactive waste according to claim 1, wherein the opening / closing door is configured to open and close inside the hanging device shield. 3. A door opening / closing mechanism, wherein the door opening / closing mechanism is provided above and below the hanging device main body in the hanging device shield, and the door is provided on the door opening / closing weight and opens and closes the opening / closing door. The hanging device for a radioactive waste body according to claim 1 or 2, further comprising an opening / closing rope and a pulley provided on the hanging device shield and supporting and guiding the door opening / closing rope. 4. A buried facility equipped with the radioactive waste body hanging device according to claim 1, wherein the hanging device main body engaging with the radioactive waste body is provided on a lid for closing the buried space. A buried facility provided with a hanging device for radioactive waste, characterized in that it is configured to be detachable. 5. A guide means for vertically guiding the radioactive waste and the hanging tool main body between the inner wall surface of the buried facility and the radioactive waste and the hanging tool main body. Item 6. A buried facility comprising the radioactive waste body hanging device according to Item 4. 6. A guide means is provided between the inner wall surface of the buried facility and the hanger shield and the lid to guide the hanger shield and the lid in the vertical direction. Item 4
Or a buried facility provided with the radioactive waste hanging device according to 5.