JPH1026694A - Overpack and device for welding it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable highly reliable welding work by remote control. SOLUTION: A groove 59 is circumferentially welded in a downward direction position by a welding torch 51, whereby multi-layer padding is performed endlessly and efficiently without stopping an arc to form a welding part 65 with a required thickness in a short time. Since a main body 74 of a container and the upper lid 55 are supported by a container supporting frame 5 through a spherical receiver 14, moreover, the leaning of a container holder 15 around the spherical receiver 14 allows the deformation due to welding distortion to be relieved even if the welding distortion occurs in the upper lid 55 during welding work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an overpack,
And an overpack welding device. More specifically, the present invention relates to an overpack and an overpack welding device capable of performing highly reliable welding by remote control.

[0002]

2. Description of the Related Art Radioactive materials (radioactive waste, spent fuel, etc.) with high, medium and low radioactivity levels are classified according to radioactivity levels (high, medium and low), and specially sealed corresponding to them. They are stored and stored in containers.

In order to store and dispose of radioactive waste in the deep underground layer and isolate it from the living sphere, the storage container formed by vitrifying the radioactive waste is surrounded by an overpack material such as metal ceramics and overpacked. And then carried into a geological disposal site, these are loaded into a disposal hole, and the surrounding area is filled with a buffer material such as bentonite to perform geological disposal.

[0004]

However, the above-described conventional overpack and overpack welding devices have the following problems.

[0005] That is, since the overpack containing the vitrified body is stored in the deep underground layer for a long period of time, it is necessary to have a strength enough to withstand high ground pressure.

For this reason, studies have been made to make the overpack thick so as to have high strength.

On the other hand, since the overpack is manufactured under a special environment of radiation, it is necessary to provide a structure that can be easily manufactured only by remote control.

However, since the overpack is thick as described above, the welding between the container body and the lid constituting the overpack is made to be a thick-walled welding, so that highly reliable welding can be performed by remote control. A device that can be used has not been developed. Further, an overpack having a structure suitable for the device has not been developed.

The present invention has been made in view of the above circumstances, and has as its object to provide an overpack and an overpack welding apparatus capable of performing highly reliable welding by remote control. .

[0010]

The first means of the present invention is as follows.
Cylindrical container body 5 capable of containing vitrified body 52 inside
4 and an upper lid 55 and a lower lid 56 which are welded and fixed to the upper and lower openings of the container body 54, and the upper lid 55 and the lower cover 56 can be fitted to the upper and lower openings of the container body 54. A disk-like shape having a fitting projection 58 at the center thereof and a groove forming notch 60 at the periphery thereof for forming a groove 59 between the upper and lower end surfaces of the container body 54; The present invention relates to an overpack characterized by the following.

In this case, the container body 54 is fitted with a cylindrical body covering material 62 on the outer periphery, and the upper lid 55 and the lower lid 56 are fitted with deep dish-shaped lid covering materials 63 and 64 on the outside. The thin ring-shaped welded covering materials 67 and 68 are fitted to the welded portions 65 and 66 between the container body 54 and the upper lid 55 and the lower lid 56, and the body covered material 62 and the welded covering material 67 are fitted. , 68, and the welding covering materials 67, 68 and the lid covering material 6
3, 64 may be fixed by welding.

The second means of the present invention is that a container support frame 5 which can be turned upside down so as to be in either a vertical state or a sideways state around a horizontal centering axis 4 is provided above the main body base 1. A container gripper 15 capable of holding a cylindrical container body 54 in a state where an upper lid 55 and a lower lid 56 are fitted into upper and lower openings of the container support frame 5 so as to be rotatable around its axial center position. And a container rotation driving device 28 for driving the container body 54 to rotate on the container support frame 5 about the axis.
In addition, the main body base 1 is provided with a welding machine support 37 for holding the welding torch 51 so as to be directed downward toward a groove 59 formed between the container body 54 and the upper lid 55. The present invention relates to an overpack welding apparatus characterized by the following.

In this case, the container holder 15 may be supported by the container supporting frame 5 via the spherical support 14.

Further, an inclination angle adjusting mechanism 9 for adjusting the inclination angle of the container supporting frame 5 in a state of lying down with respect to the main body base 1.
May be provided.

Further, the welding torch 51 may be attached to the welding machine support 37 via a torch moving mechanism 73.

Further, the container supporting frame 5 may be provided with a slag removing jig 35 for removing slag on the overlay formed by the welding torch 51.

Further, the container support frame 5 may be provided with a heating device 30 for heating a groove 59 formed between the container body 54 and the upper lid 55.

According to the above means, the following effects can be obtained.

The container body 74 (the lower cover 56 is fitted to the container body 54) in which the vitrified body 52 is accommodated and the upper cover 55 is mounted between the container grippers 15 of the container support frame 5 which is made vertical. (Fixed by welding).

At this time, the container body 54 is provided with a body covering material 62.
Is fitted to the upper lid 55 and the lower lid 56,
64 may be fitted.

When the container body 74 is set on the container support frame 5, the container support frame 5 is turned obliquely and sideways.

When the container supporting frame 5 is laid down sideways,
The welding torch 51 attached to the upper end of the welding machine column 37 erected from the upper part of the main body base 1 is moved, and further, if necessary, the container supporting frame 5 is
Adjust the tilt angle of.

Accordingly, the welding torch 51 is directed downward and at an angle of half of the groove 59 with respect to the groove 59 formed between the upper lid 55 and the upper and lower end surfaces of the container body 54.
To make it head.

Further, the heating device 30 is moved closer to the groove 59 so as to heat the groove 59.

In this state, the container rotation driving device 28 is driven to rotate the container body 74.

Then, the container main body 74 attached to the container supporting frame 5 is rotated about the axial center position, so that the groove 59 is circumferentially welded with the welding torch 51 in a downward posture.

As described above, since the groove 59 is welded in a downward position, the work can be advanced in the atmosphere by using various arc welding such as MAG, TIG, and SAW. This eliminates the need to use a vacuum chamber as in the case of performing thick-wall welding using, for example, and can reduce equipment costs. In addition, it is possible to perform welding without defects such as microporosity and linear defects such as electron beam welding.

Further, by moving the slag removing jig 35 close to the overlay formed on the groove 59, the slag on the overlay surface can be automatically removed.

As described above, since the welding is performed in the circumferential direction while automatically removing the slag, the multi-layer building is performed endlessly and efficiently without stopping the arc, and the welded portion 65 having a required thickness can be formed in a short time. Can be formed.

Further, if the thick wall is welded as described above, in particular, it is unavoidable that welding distortion occurs in the upper lid 55, but the container body 74 and the upper lid 55 are not supported by the spherical support 14. Is supported by the container support frame 5 through
If welding distortion occurs in the upper lid 55 during welding, the spherical support 1
When the container holder 15 is tilted about the center 4, deformation due to welding distortion is released. Thus, the axis of the container body 54 is prevented from being shifted from the rotation shaft 13 due to welding distortion, and welding can be performed with high accuracy.

As described above, according to the overpack welding apparatus of the present invention, even in a special environment such as a radioactive atmosphere, it is possible to easily, reliably and accurately perform thick welding by remote control.

After the welding of the container body 74 and the upper lid 55 is completed, a welding portion covering material 67 is fitted to a welding portion 65 of the container main body 74 and the upper lid 55, and the body covering material 62 and the welding portion covering material 67, and the lid covering material 63 and the welded covering material 67 are welded with the welding torch 51 to form a container body 74.
And the material of the coating material are not mixed by welding so that the welded portions 65 and 66 are not made brittle.

As described above, an overpack is manufactured.

Further, in the overpack according to the present invention, since the upper lid 55 and the lower lid 56 have the same structure, the space between the container trunk 54 and the upper lid 55, and between the container trunk 54 and the lower lid 56 are formed. Can be welded with one overpack welding device.

Further, since the upper cover 55 and the lower cover 56 have a structure in which the fitting projections 58 are fitted into the container body 54, they can be easily assembled by fitting.

Further, the upper lid 55 and the lower lid 56 are formed with a notch 60 for forming a groove on the peripheral edge thereof, so that the container body 54 is formed.
Although the groove 59 is formed between the upper and lower ends of the groove, the groove 59 can be easily formed because the groove forming notch 60 is easily machined.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention.

The overpack welding apparatus according to the present invention has the following structure.

That is, a pair of support members 3 are provided above the flat main body base 1 at intervals in the width direction 2 of the main body base 1, and a horizontal support member 3 extends in the width direction 2 between the support members 3. The raising / lowering central shaft 4 is inserted and arranged, and the container supporting frame 5 is pivotally supported by the raising / lowering central shaft 4 so as to be tiltable in the vertical direction, and is vertically attached to one end of the longitudinal direction 6 on the main body base 1. In this state, a vertical posture holding member 7 for supporting the bottom surface of the container support frame 5 is provided, and the back surface of the container support frame 5 is tilted obliquely and horizontally to the other end of the longitudinal direction 6 on the main body base 1. A lateral posture holding member 8 to be supported is provided, and the lateral posture holding member 8 is configured by a tilt angle adjusting mechanism 9 such as a cylinder.

The container support frame 5 has a substantially C-shape in which upper and lower arms 10 and 11 are extended toward the vertical posture holding member 7, and bearings 12 and 11 are provided on the upper and lower arms 10 and 11, respectively. Rotary axis 1
3. The container gripper 15 is attached via the spherical support 14.

A male screw 16 is formed at a portion of the rotation shaft 13 on the arm 10 side, which is upper when the container support frame 5 is made vertical, protruding from the container support frame 5.
A nut 17 for opening and closing the container gripper 15 is screwed onto the container.

A hanging piece, not shown, is engaged with the container supporting frame 5 by hooking a hook 18 of a crane (not shown) on both sides of the arm portion 10 which is upward when the container supporting frame 5 is turned upright. 19 are mounted.

Further, the container supporting frame 5 has a C-shaped body 2.
0, while supporting an overpack 21 described later so that the axis thereof coincides with the rotation shaft 13,
A driven wheel 22 and a driving wheel 23 for assisting the rotation of the motor are mounted via an arm 24, and a container rotation driving device 28 such as a motor is connected to the driving wheel 23 via a sprocket 25, a chain 26 and a sprocket 27. ing.

Further, a heating device 3 such as a high-frequency coil is placed on the container support frame 5 at a welding position 29 (on the side of the horizontal posture holding member 8) with respect to the set overpack 21.
0 is a position adjusting device 3 such as a bracket 31 and a cylinder.
2 so that the position of the overpack 21 can be adjusted in the radial direction 33 of the overpack 21.

In addition, a slag removing jig 35 such as a wire brush which can be moved toward and away from the welding position 29 by a rotating device 34 such as a motor is attached to the container supporting frame 5. A slag receiver 36 for receiving the slag removed by the tool 35 is provided.

A column 37 for a welding machine is erected on the upper side of the main body base 1 on the side of the horizontal posture holding member 8, and a horizontal turning drive device 3 such as a motor is provided at the upper end of the column 37 for the welding machine.
8. A horizontal swing arm 40 is provided via a horizontal swing shaft 39. The horizontal swing arm 40 is provided with a horizontal drive device 41 such as a motor, a horizontal ball screw 42, and a nut 43.
A traversing arm 44 extending in the up-down direction is provided, and an elevating drive device 45 such as a motor, a vertical ball screw 46, and a nut 47 are provided on the traversing arm 44. The welding torch 51 is provided downward through the device 49 and the vertically rotating arm 50, and constitutes a torch moving mechanism 73.

On the other hand, as shown in FIG. 3, the overpack 21 has a thick cylindrical body 54 made of carbon steel capable of accommodating a vitrified body 52 through a cushioning material 53 therein.
An upper lid 55 made of carbon steel is fixed to the upper end opening of the container body 54 by welding, and a lower lid 56 made of carbon steel is fixed to the lower opening of the container body 54 by welding.

The upper lid 55 and the lower lid 56 have the same structure. That is, the upper lid 55 and the lower lid 56 are
4 has a thick disc-like shape having a stepped portion 57 which can be locked to the inner peripheral corners of the upper and lower end openings at the center portion, and a container is provided at the peripheral portion thereof. A groove forming notch 60 for forming an L-shaped groove 59 between the upper and lower end surfaces of the body 54 is formed so as to be separated from the step 57.

Further, the outer periphery of the overpack 21 is covered with a corrosion-resistant coating 61 made of stainless steel, copper, titanium, a nickel-based alloy, or the like, and the corrosion-resistant coating 61 is a thin cylinder fitted on the outer periphery of the container body 54. Shaped body covering material 62
And thin-walled deep-plate-shaped lid covering members 63 and 64 to be fitted to the upper lid 55 and the lower lid 56, and a thin ring-shaped for covering the welded portions 65 and 66 formed on the groove 59. And a welded portion covering material 67, 68.

Reference numerals 69 and 70 denote welding portions between the body covering material 62 and the welding portion covering materials 67 and 68, and reference numerals 71 and 72 denote welding portions between the lid covering materials 63 and 64 and the welding covering materials 67 and 68. , 74
Is a container body formed by fitting the lower lid body 56 to the container body 54 and fixing it by welding.

Next, the operation will be described.

As a step before enclosing the vitrified body 52 in the overpack 21, the lower lid 56 with the lid coating 64 fitted on the container body 54 with the body coating 62 previously fitted. The container body 74 is made by welding and fixing, and by welding and fixing the welding portion covering material 68 between the lid portion covering material 63 and the trunk portion covering material 62. The space between the container body 54 and the lower lid body 56, and the space between the lid covering material 63 or the body covering material 62 and the welded covering material 68 will be described later using the overpack welding apparatus according to the present invention. It can be welded in the same way as it does.

Further, the upper lid 5 fitted with the lid covering material 63
5 and a welding portion covering material 67 are prepared.

When the vitrified body 52 is sealed in the overpack 21, the vitrified body 52 is housed in a container body 74 formed by welding and fixing the lower lid 56 to the container body 54 using a manipulator (not shown). After filling the cushioning material 53 between the container body 74 and the vitrified body 52,
The fitting projection 58 of the upper lid 55 with the lid covering material 63 fitted therein is fitted into the upper end opening of the container body 54.

In this state, as shown by a virtual line in FIG.
Using the manipulator, the container main body 74 in which the vitrified body 52 is accommodated and the upper lid 55 is attached is set on the container support frame 5 which is made vertical by supporting the bottom surface by the vertical posture holding member 7. .

More specifically, it is screwed into a male screw portion 16 formed at a portion of the rotation shaft 13 on the arm portion 10 which is located above the container supporting frame 5 when the container supporting frame 5 is lengthened and which protrudes from the container supporting frame 5. The container gripper 15 is opened by loosening the nut 17, and the container body 54 fitted with the body covering material 62 is disengaged from the container gripper 15.
Then, the container body 54 is supported by the driven wheel 22 and the drive wheel 23, and the nut 17 is tightened to set the container gripper 15 to be closed.

At this time, the container body 54 is supported by the driven wheels 22 and the driving wheels 23 so that the axis of the container body 54 coincides with the rotation axis 13. This allows
The position of the container body 74 can be easily adjusted.

When the container body 74 is set on the container support frame 5, hooks 18 of a crane (not shown) are engaged with hanging pieces 19 attached to both side portions of the upper arm portion 10 of the container support frame 5, The container support frame 5 is tilted obliquely and horizontally as shown by the solid line, and the back surface of the container support frame 5 is supported by the lateral posture holding member 8.

When the container supporting frame 5 is laid down sideways,
By driving a horizontal turning drive device 38 such as a motor mounted on the upper end of a support column 37 for a welding machine erected on the side of the horizontal posture holding member 8 on the upper part of the main body base 1, the horizontal turning shaft portion 39 is used for horizontal turning. The arm 40 is turned horizontally, and the horizontal turning arm 4
Drive a traversing drive device 41 such as a motor attached to
The traversing arm 44 extending in the vertical direction is traversed via the horizontal ball screw 42 and the nut 43, and the elevating drive device 45 such as a motor attached to the traversing arm 44 is driven. Is moved up and down, and a vertically rotating drive device 49 such as a motor attached to the vertically moving body 48 is driven, and the welding torch 51 is vertically rotated through a vertically rotating arm 50.

Further, if necessary, the inclination angle of the container supporting frame 5 is adjusted by using an inclination angle adjusting mechanism 9 such as a cylinder of the lateral posture holding member 8.

Thus, the welding torch is directed downward and at half the angle of the groove 59 with respect to the L-shaped groove 59 formed between the upper lid 55 and the upper and lower end surfaces of the container body 54. Make sure 51 is facing you.

Further, a position adjusting device 32 such as a cylinder is provided.
The heating device 30 such as a high-frequency coil is welded to the welding position 2 of the groove 59 with respect to the set overpack 21.
9, the groove 59 is heated.

In this state, a container rotation driving device 28 such as a motor is driven to drive the sprocket 27, the chain 26,
The drive wheels 23 are rotationally driven via the sprockets 25.

Then, the drive wheel 23 attached to the C-shaped body portion 20 of the container support frame 5 and attached via the arm 24 is rotated, and the overpack 21 is rotated about the axial position. Using the welding torch 51, the groove 59 is circumferentially welded in a downward posture.

As described above, the L-shaped groove 59
MAG, TIG, SAW
Work can be carried out in the atmosphere using various types of arc welding, such as electron beam welding, eliminating the need to use a vacuum chamber as in the case of performing thick wall welding using electron beam welding, etc., and reducing equipment costs Will be able to do that. In addition, it is possible to perform welding without defects such as microporosity and linear defects such as electron beam welding.

Further, the slag on the surface of the overlay is automatically removed by moving the slag removing jig 35 such as a wire brush close to the overlay formed on the groove 59 by a rotating device 34 such as a motor. , Can be dropped on the slag receiver 36.

As described above, since the circumferential welding is performed while automatically removing the slag, the multi-layer building is performed endlessly and efficiently without stopping the arc, and the welded portion 65 having a required thickness can be formed in a short time. Can be formed.

When the thick wall is welded as described above, in particular, it is unavoidable that welding distortion occurs at the upper lid 55, but the container body 74 and the upper lid 55 are not supported by the spherical support 14. Is supported by the container support frame 5 through
If welding distortion occurs in the upper lid 55 during welding, the spherical support 1
When the container holder 15 is tilted about the center 4, deformation due to welding distortion is released. Thus, the axis of the container body 54 is prevented from being shifted from the rotation shaft 13 due to welding distortion, and welding can be performed with high accuracy.

As described above, according to the overpack welding apparatus of the present invention, even in a special environment such as a radioactive atmosphere, it is possible to easily and reliably perform high-thickness welding by remote control.

After the welding of the container body 74 and the upper lid 55 is completed, a welding portion covering material 67 is fitted to a welding portion 65 between the container main body 74 and the upper lid 55, and the body portion covering material 62 and the welding portion covering material 67, and the lid covering material 63 and the welded covering material 67 are welded with the welding torch 51 to form a container body 74.
And the material of the corrosion-resistant coating 61 are not mixed by welding so that the welded portions 69 to 72 do not become brittle.

As described above, the overpack 21 is manufactured.

Further, the overpack 21 according to the present invention
Since the upper lid 55 and the lower lid 56 have the same structure, between the container body 54 and the upper lid 55,
And the lower lid 56 can be welded by one overpack welding device.

Further, since the upper lid 55 and the lower lid 56 have a structure in which the fitting projections 58 are fitted into the container body 54, they can be easily assembled by fitting.

Further, the upper lid 55 and the lower lid 56 are formed with a notch 60 for forming a groove at the peripheral edge thereof, so that the container body 54 is formed.
Although the L-shaped groove 59 is formed between the upper and lower end surfaces, the groove forming notch 60 is easily machined, so that the groove 59 can be easily formed.

It should be noted that the present invention is not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention.

[0077]

As described above, according to the overpack and overpack welding apparatus of the present invention, the following excellent effects can be obtained.

1) Since the groove 59 is welded in a downward position, the work can be performed in the atmosphere by using various arc welding such as MAG, TIG, and SAW. This eliminates the need to use a vacuum chamber as in the case of performing thick-wall welding, thereby reducing equipment costs. In addition, it is possible to perform welding without defects such as microporosity and linear defects such as electron beam welding.

2) Since slag is automatically removed by the slag removal jig 35 and circumferential welding is performed,
It is possible to efficiently and endlessly build a multilayer without stopping the arc, and to form the welded portion 65 having a required thickness in a short time.

3) In thick-wall welding, in particular, it is unavoidable that welding distortion occurs in the upper lid 55, but the container body 74 and the upper lid 55 are connected to the container support frame 5 via the spherical support 14. Because of the support, even when welding distortion occurs in the upper lid 55 during welding, the container gripping tool 15 is tilted about the spherical support 14, so that deformation due to welding distortion is released, and thus welding distortion occurs. As a result, the axis of the container body 54 is
3 can be prevented and welding can be performed with high accuracy.

4) According to the overpack welding apparatus of the present invention, even in a special environment such as a radioactive atmosphere, it is possible to easily and reliably perform thick welding by remote control with high accuracy.

5) Overpack 21 according to the present invention
Since the upper lid 55 and the lower lid 56 have the same structure, between the container body 54 and the upper lid 55,
And the lower lid body 56 can be welded by one overpack welding apparatus.

6) Since the upper lid 55 and the lower lid 56 have a structure in which the fitting projections 58 are fitted into the container body 54, they can be easily assembled by fitting.

7) The upper lid 55 and the lower lid 56 are formed with a notch 60 for forming a groove at the peripheral edge thereof, so that an L-shaped groove 59 is formed between the upper and lower end surfaces of the container body 54. However, since the groove forming notch 60 is easily machined, the groove 59 can be easily formed.

[Brief description of the drawings]

FIG. 1 is a partially cut-away schematic side view of an example of an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a schematic side view of the overpack of FIG. 1 with a part cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body base 4 Inversion center axis 5 Container support frame 9 Inclination angle adjustment mechanism 14 Spherical support 15 Container gripper 28 Container rotation drive device 30 Heating device 35 Slag removal jig 37 Welding machine column 51 Welding torch 52 Vitrified body 54 Container trunk 55 Upper lid 56 Lower lid 58 Fitting projection 59 Groove 60 Groove forming notch 62 Trunk covering 63, 64 Lid covering 65, 66 Welding 67, 68 Welding covering 73 73 Torch Moving mechanism

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B23K 37/047 502 G21F 9/36 501C G21F 9/36 501

Claims (8)

[Claims] 1. A cylindrical container body (54) capable of accommodating a vitrified body (52) therein, and an upper lid (55) and a lower lid fixed by welding to upper and lower openings of the container body (54). (5
6), the upper lid body (55) and the lower lid body (56) have a fitting projection (58) at the center thereof which can be fitted to the upper and lower openings of the container body (54), The container body (5
4) An overpack having a disk shape having a groove forming notch (60) for forming a groove (59) between upper and lower end surfaces. 2. A container body (54) having a cylindrical body covering material (62) fitted around the outer periphery thereof, and an upper lid body (55) and a lower lid body (56) having a deep dish-shaped lid covering material (62). 63) and (64) are fitted to the outside, and a thin ring-shaped welded portion covering material (65) (66) is welded to the welded portions (65) and (66) of the container body (54) and the upper lid (55) and the lower lid (56). 67) and (68) are fitted, and between the trunk portion covering material (62) and the welding portion covering materials (67) and (68), and between the welding portion covering materials (67) and (68) and the lid portion covering material ( 6
3. The overpack according to claim 1, wherein the gap between the overpack and (64) is fixed by welding. 3. A container support frame (5) is provided on the upper part of the main body base (1) so that the container support frame (5) can be tilted so as to be in either a vertical state or a horizontal state about a horizontal tilt center axis (4). A cylindrical container body (5) in which an upper lid (55) and a lower lid (56) are fitted into upper and lower openings of a container support frame (5).
4) A container gripper (15) capable of holding the container rotatably about its axial center is mounted, and a container rotation for rotating the container body (54) about the axis on the container supporting frame (5). The drive device (28) is attached, and the welding torch is further attached to the main body base (1) so as to face down toward a groove (59) formed between the container body (54) and the upper lid (55). Welder support (51) holding (51)
7) An overpack welding apparatus comprising: 4. The overpack welding apparatus according to claim 3, wherein the container gripper (15) is supported on the container support frame (5) via a spherical support (14). 5. An overpack welding apparatus according to claim 3, wherein an inclination angle adjusting mechanism (9) capable of adjusting an inclination angle of the container support frame (5) in a state of being laid down on the body base (1) is provided. . 6. The overpack welding apparatus according to claim 3, wherein the welding torch (51) is attached to the welding machine support (37) via a torch moving mechanism (73). 7. A welding torch (5) is provided on the container support frame (5).
The overpack welding apparatus according to any one of claims 3 to 6, further comprising a slag removal jig (35) for removing slag on the overlay formed by the method (1). 8. The container support frame (5) is provided with a heating device (30) for heating a groove (59) formed between the container body (54) and the upper lid (55). 8. The overpack welding apparatus according to any one of claims 7 to 7.