Container dismantling device and method

Abstract

The present invention relates to a dismantling device for a container (10) having a peripheral wall (20) and an opening surrounded by the peripheral wall, a shielding lid (14) arranged above the opening, and a dismantling tool for cutting segments (42, 44, 46, 53, 56) from the peripheral wall. The dismantling is performed by gradually cutting a hollow cylindrical ring-shaped region of the peripheral wall into segments and then removing the segments. After removing the segmented hollow cylindrical ring-shaped region, the remaining leading edge of the peripheral wall becomes usable. The shielding lid has a lowering device for gradually lowering the shielding lid onto the leading edge that is each time usable.

Description

[Technical field]

[0001] The present invention relates to a device for dismantling vessels, in particular nuclear installation vessels, primarily reactor pressure vessels, which have a peripheral wall and an opening surrounded by the peripheral wall, a shielding cover arranged over the opening, and a dismantling tool for cutting segments from the peripheral wall, the dismantling being carried out in such a way that a hollow cylindrical ring-shaped region of the peripheral wall is cut into segments in stages and then the segments are removed, with the leading edge of the remaining peripheral wall becoming usable after removal of the segmented hollow cylindrical ring-shaped region.

[0002] The present invention also relates to a method for dismantling a vessel, in particular a nuclear installation, mainly a reactor pressure vessel, which has a peripheral wall and an opening surrounded by the peripheral wall, a shielding cover arranged over the opening, and a dismantling tool for cutting segments from the peripheral wall, in which the dismantling is carried out in such a way that a hollow cylindrical ring-shaped area of ​​the peripheral wall is cut into segments in stages and then the segments are removed, in which after the removal of the segmented hollow cylindrical ring-shaped area, the leading edge of the remaining peripheral wall becomes usable. [Background technology]

[0003] The device, or more specifically the method relating to the device, is in fact used for the removal of nuclear reactor pressure vessels.

[0004] During the decommissioning of a nuclear facility, particularly considerable efforts are required to dismantle and remove vessels, such as the reactor pressure vessel, which, due to their high radioactivity, must be taken care of to prevent the spread of contamination from the interior of the vessel to be dismantled to the surrounding area, as well as to protect the surrounding area from radiation emitted from inside the reactor pressure vessel.

[0005] The vessel is usually located in a pit that is enclosed at the top to allow for pneumatic regulation, with negative pressure regulation to limit escaping contamination.

[0006] The vessel is extremely heavy and removing it as a unit often poses problems, in which case the large weight of the vessel further necessitates removal of the containment vessel in order to utilize existing lifting equipment within the nuclear facility.

[0007] If it is desired to avoid the above disadvantages, lifting devices are located inside the containment vessel, with which the dismantled vessel pieces or segments can be lifted and then moved to a further processing station.

[0008] A disadvantage of the above method is that when removing the segments, the shielding lid, such as the shield plate, must be held within the containment vessel by existing lifting equipment, and therefore multiple lifting equipment is essentially required to remove the segments and hold the shielding lid at the same time. Summary of the Invention

[0009] The object of the invention is to further develop a device and a method of the type mentioned at the beginning in such a way that the dismantling of the container can be carried out using structurally simple means.

[0010] With this device, the above-mentioned object is fundamentally achieved in that the cover lid has a lowering device for lowering the cover lid stepwise onto the respective accessible leading edge.

[0011] A stand-alone system is provided that allows the position of the shielding lid to be adjusted relative to the vessel without the need for a separate lifting device, and more precisely, the shielding lid can be lowered to a desired extent using a lowering device that is integrated with the shielding lid and can be supported at the required extent of the leading edge of the vessel.

[0012] In this respect it is particularly provided that the lowering device has at least two supports, preferably three supports arranged offset from one another by 120°, via which the shielding lid can be supported.

[0013] In this case, the support must be a distal part of a cross member which is movable relative to the shielding lid via at least one movement mechanism, such as a cylinder, a spindle, a lifting mechanism like a rope winch, etc.

[0014] The movement mechanism with the support forms the lowering device, i.e. is part of the lowering device.

[0015] In order to enable problem-free dismantling, the invention provides in an inventive development that a flat plate element having the shape of a ring, or more precisely a partial ring, is arranged on the outside of the shielding lid so as to be rotatable relative to the shielding lid, from which element a dismantling tool emerges.

[0016] In particular, and likewise according to an original invention, it is provided that a flat plate element, which may be called annular plate, has a cutout, the extent of which in the circumferential direction is greater than the extent of one segment in the circumferential direction.

[0017] The radial extent of the cutout must be at least the same as, or at least approximately the same as, the radial extent of the plate element on the outside of the shielding lid.

[0018] The shielding lid has a disk shape with a flat plate element extending radially beyond the periphery of the lid.

[0019] In particular, the diameter of the cover lid is smaller than the inside diameter of the container, but nevertheless there is only a small gap between the inside of the container and the surroundings in which it is located, i.e. the gap between the cutout in the annular plate and the container edge, i.e. the container periphery, since the gap between the cover lid and the container is otherwise covered by a flat plate element, which may be called annular plate, from which the dismantling tools emerge.

[0020] In this case, it is particularly provided that a support device for a dismantling tool extends along the inner border of the cutout.

[0021] Since the extent of the cutout is larger than the extent of one segment, i.e. the segments are cut out according to the extent of the cutout, problem-free cutting of the peripheral wall can be performed, in which case the dismantling tool can be moved in the X, Y and Z directions, so that cuts extending in the axial, radial and circumferential directions are performed in the required range, and the segments are separated by said cuts.

[0022] The segments are also lifted through the cutouts.

[0023] Demolition tools may be mechanically and / or thermally actuated demolition tools, examples of which include gas cutters, plasma cutters and milling tools.

[0024] By rotation of the annular plate from which the dismantling tools emerge, the tools can be positioned at the desired area of ​​the peripheral wall of the container so as to perform the required cuts.

[0025] In this case, it is particularly provided that the plate element is supported against the shielding lid via a rotary bearing.

[0026] The invention is directed to the dismantling of a vessel of a nuclear installation, in particular a reactor pressure vessel, having a peripheral wall and an opening surrounded by the peripheral wall, with a shielding cover arranged above the opening and with a dismantling tool for cutting out segments from the peripheral wall, the dismantling being carried out in such a way that a hollow cylindrical ring-shaped area of ​​the peripheral wall is cut into segments in stages and then the segments are removed, the leading edge of the remaining peripheral wall becoming usable after the removal of the segmented hollow cylindrical ring-shaped area, the dismantling being carried out by the following steps: - separating the segments of the first region, which has a hollow cylindrical ring shape with the cover lid placed on the opening, in such a way that vertical or longitudinal separation cuts are formed between the segments, running in the longitudinal direction of the container, and horizontal or bottom separation cuts are formed, running on the bottom side, except for at least two segments that are support segments; - removing the segments separated by the vertical or lengthwise and horizontal or bottom separation cuts, while maintaining support of the shielding lid on at least two remaining support segments; - supporting the shielding lid on the leading edge of the peripheral wall formed by the removal of the segments, by means of a lowering device emerging from the shielding lid; - forming horizontal or bottom separation cuts in at least two remaining support segments; - removing the support segment; and - Lowering the shielding lid onto the leading edge using a lowering device. Also featured is a method for dismantling a container, including:

[0027] In this case, it is specifically provided that, in order to form the segments, first a vertical or longitudinal separation cut and / or a horizontal or bottom separation cut is partially performed, followed by cutting off the remaining areas between the segments and the peripheral wall.

[0028] Preferably, the remaining areas should be provided in the corner areas of the segment to be cut off.

[0029] To remove a segment, it is only necessary to first move the segment radially relative to the container in an area that corresponds to the contact area between the lowering device and the container edge. Lifting of the segment can then take place along the container's longitudinal axis. Thus, only small spatial requirements are required between the container and the shield surrounding it in order to remove the segment.

[0030] To remove a segment, a notch in the annular plate is aligned with the segment so that the segment can be lifted through the notch.

[0031] Further details, advantages and features of the invention emerge - alone and / or in combination - from the claims, the features which can be seen from the claims, as well as from the description of preferred embodiments which can be seen from the following drawings, in which: [Brief description of the drawings]

[0032] [Figure 1] FIG. 2 is a partial principle diagram of a container. [Diagram 2] 2 is a view of the container according to FIG. 1 after a longitudinal separation cut has been carried out. [Diagram 3] FIG. 3 is a view of the container according to FIG. 2 after the bottom separation cut has been performed. [Figure 4] FIG. 4 shows the container according to FIGS. 1 to 3 after a number of longitudinal and bottom separation cuts have been carried out. [Diagram 5] FIG. 5 is a view of the container according to FIGS. 1 to 4 after removal of the segments, with the support segments remaining. [Figure 6] FIG. 6 is a view of the container according to FIGS. 1 to 5 with the lowering device lowered. [Figure 7] FIG. 7 is a view of the container according to FIGS. 1 to 6 after removal of the support segment. [Figure 8] FIG. 8 is a view of the container according to FIGS. 1 to 7 with the shielding plate lowered onto the container edge. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] With the aid of the figures, the inventive dismantling system of a vessel 10 will be explained, which is particularly intended for reactor pressure vessels used in nuclear power plants. The vessel is usually located in a pit whose opening side is protected by a shielding plate, which may be placed directly on the top opening of the vessel, which may have a cylindrical shape in some cases.

[0034] However, the present invention is not limited to nuclear reactor pressure vessels.

[0035] The pit itself is pneumatically enclosed, with a negative pressure being generated in order to prevent the spread of contamination in the reactor building. A packaging station, for example, can also be provided in the pneumatic containment.

[0036] Inside the pneumatic containment vessel there is also lifting equipment, such as a crane, to be able to lift the segments cut from the vessel, thereby avoiding the need to use existing lifting equipment outside the containment vessel itself, which would otherwise require opening the containment vessel.

[0037] The present invention essentially departs from the above-mentioned prior art, except that the segmentation of the vessel 10 is carried out in such a way that, despite the staged dismantling, a standalone system for covering the vessel 10 is available and therefore no separate lifting equipment is required, and at the same time it is intended to allow problem-free removal of the segments even in tight space situations, in particular with lifting equipment arranged in the pneumatic containment vessel.

[0038] FIG. 1 shows a partial principle diagram of a container 10 with a flange-like edge 12 extending toward the opening side, which surrounds the opening, which is covered by a shielding lid 14, which is a circular shielding plate with a peripheral shape that should correspond to the inner shape of the container 10 in the opening area.

[0039] As will become apparent particularly from FIGS. 4 to 8, the shielding plate 14 rests on the edge 18 of the container 10 via a strip-shaped band 16 extending therefrom.

[0040] The diameter of the shielding plate 14 is smaller than the inner diameter of the container 10. Nevertheless, sufficient shielding is provided by covering the gap between the container inner wall 21 and the shielding plate 14 via an annular plate 22 from which tool support devices 24 for dismantling tools 26 emerge. The annular plate 22 is rotatably mounted on the shielding plate 14.

[0041] As becomes clear from the drawing, the width of the annular plate 22 is selected so that its outer side can extend essentially in line with the circumferential surface of the edge 12 and at the same time overlap the outer edge of the shielding plate 14, except for the cutout 28, in the region of which the tool support device 24 for the dismantling tool 26 is located.

[0042] Thus, although there is only a small gap between the peripheral wall 20 of the container 10 and the interior space of the container 10, this does not mean that contamination diffusion can occur.

[0043] 1 furthermore shows the supports 30 which are hook-shaped parts of the crossbeams 32. In this embodiment, three interconnected beams 32 are provided, the connections between which can be transverse to the longitudinal axis of the container 10. The individual beams 32 are connected to the drives - in this embodiment via cylinders - whose outer housings 34, 35, 36 are shown in principle.

[0044] Three beams 32 with three supports 30 - corresponding to three cylinders - are arranged offset by 120° overall, using which the shielding plate 14, and thus the annular plate 22 with the dismantling tools 26, are gradually lowered onto the edge of the container wall 20 formed by the removal of segments, as described below.

[0045] As a result, a lowering device extending from the shield 14 becomes available, thereby providing a stand-alone system for covering the interior of the vessel 10 as the dismantling of the vessel progresses.

[0046] The dismantling tool 26 can be a mechanical or thermally actuated tool, such as a gas cutter, a plasma cutter or a cutting tool, for example a saw, to name just a few examples of dismantling tools. The dismantling tool 26 can be moved axially, radially and circumferentially as shown in the figure in order to carry out the separating cut in the desired area. To this end, the tool 26 can be moved along the tool support device 24 on the one hand. On the other hand, as can be clearly seen from the figure, a holder 25 emerges from the tool support device 24 in order to be able to move the dismantling tool 26 axially.

[0047] If the lowering device or beam 32 with the support 30 is movable in the longitudinal direction of the container 10 via a cylinder, other drive devices such as a spindle or wire rope hoist are also possible.

[0048] In Fig. 1 the state is shown before the start of the segmentation. The dismantling tool 26 is in the starting position, in which, when it is actuated, a vertical cut is made starting from the upper edge 18, as can be seen from Fig. 2. The axial (vertical) or longitudinal separation cut 38 is visible. It is also clear that the dismantling tool 26 has been moved in the holder 25 in the direction of the longitudinal axis of the container 10 - downwards in the figure.

[0049] In Fig. 3, after the axial or longitudinal separation cut 38 has been made, a bottom or horizontal separation cut 40 is made in the circumferential direction, in which the dismantling tool 26 remains in its position in the holder 25 and is moved clockwise in the drawing on the tool support device 24, the guide surfaces of which have a curvature corresponding to the curvature of the container 10.

[0050] After making the bottom or horizontal cut 40, a second axial separation cut is made extending toward the edge 18 to create a segment 42. Similarly, multiple segments are formed, some of which are designated by reference numerals 42, 44, 46, as shown in FIG.

[0051] The segments 42, 44, 46 are separated by both vertical or axial separation cuts and by bottom or horizontal separation cuts, which are designated by the reference numerals 38, 48, 50, 52 for the axial separation cuts and 40, 54, 55 for the horizontal or bottom separation cuts.

[0052] In this embodiment, further segments 53, 56 extend at intervals of 120°, which may have the same dimensions as segments 42, 44, 46, in which the bottom, i.e. horizontal, separation cut has not been made for the time being or has not been made completely, so that these segments 53, 56 continue to be fixedly connected to the peripheral wall 20 of the container 10.

[0053] Regardless of the above, when making the axial and bottom separation cuts, the latter must first be performed in such a way that the connections between each other and to the peripheral wall 20 remain partially intact, so that there is no risk that the segments may become displaced when the separation cuts are made.

[0054] The segments 42, 44, 46, 53, 56 shown in Fig. 4 together with the other coplanar segments form a hollow cylindrical ring as a whole. To remove the ring, the segments 42, 44, 46 with the partial axial separation cuts 38, 48, 50, 52 and the horizontal separation cuts 40, 54, 55 are first completely separated from the vessel wall 20 and the adjacent segments 53, 44, 46, 42, 44, 56, respectively, and then removed using a lifting tool. For this purpose, the cutouts 28 of the annular plate 22 are aligned on the segment to be removed, after which the separation cuts of the segment are performed and the segment is lifted vertically, unless this concerns a segment which first requires a radial movement, i.e. above which the support 30 (Fig. 1) or the strip 16 (Fig. 4) extends.

[0055] On the segments 53, 56, which may be called support segments, that are not completely detached, the shielding plate 14 with the instrument support device 24 remains, so that further segments 42, 44, 46 can be removed without any problems. This situation is shown in FIG.

[0056] After removal of the detached segments 42, 44, 46 - similar segments being located in the non-visible area of ​​the container 10 - the lowering device with the support 30 is actuated so that the support 30 is lowered and supported on the edge 58 resulting from the removal of the detached segments 42, 44, 46 in the peripheral wall 20 of the container 10. On this basis, the lowered support 30 is visible in FIG.

[0057] By lifting the shield 14 and thus decoupling the strip-shaped support 16 from the support segments 53, 56, the latter can be released and therefore removed. This can be seen in Figure 7. The beams 32, 66 with supports 30, 68 supported on the edge 58 of the peripheral wall 20 of the container 10 can be seen.

[0058] When the shielding plate 14 with the annular plate 22 is supported on the edge 18, the annular plate 22 is moved with respect to the cutout 28 so that the bottom sides of the support segments 53, 56 are separated from the peripheral wall 20, and thus horizontal cuts 62, 64 are performed.

[0059] The shielding plate 14 with the rotatably formed annular plate 22 is then lowered by means of a lowering device so that the strip-shaped support 16 can be placed on the edge 58, whereby the previously described procedure can be carried out again, thus gradually removing the hollow cylindrical ring formed by the segments of the container 10 and thereby dismantling the container. The invention as originally claimed in the present application is set forth below. [1] A vessel (10) for dismantling a nuclear installation, primarily a reactor pressure vessel, comprising a peripheral wall (20) and an opening surrounded by the peripheral wall, a shielding lid (14) arranged above the opening, and a dismantling tool (26) for cutting out segments (42, 44, 46, 53, 56) from the peripheral wall, the dismantling being carried out in such a way that a hollow cylindrical annular region of the peripheral wall is cut into segments in stages and then the segments are removed, the remaining peripheral wall having a leading edge (58) becoming usable after the removal of the segmented hollow cylindrical annular region, characterized in that the shielding lid (14) comprises a descent device (30, 32, 66, 68) for gradually lowering the shielding lid onto the leading edge (58) which is respectively usable. Container dismantling equipment. [2] The lowering device (30, 32, 66, 68) has at least two supports (30, 68), mainly three supports arranged at 120° offset from each other, through which the shielding lid (14) can be supported. Characterized by: [1] The apparatus described in. [3] The support (30, 68) is a distal end portion of a cross member (32, 66) that is movable relative to the shielding cover (14) via at least one moving mechanism such as a cylinder, a spindle, or a rope winch. Characterized by: 1. The device according to claim 1 or 2. [4] A flat plate element (22) having a circular ring shape, or more precisely, a partial circular ring shape, is arranged on the outside of the shielding lid (14) so ​​as to be rotatable relative to the shielding lid, and a dismantling tool (26) protrudes from the element. Characterized by: An apparatus according to at least one of claims [1] to [3]. [5] The shielding lid (14) has a disk shape, and the flat plate element (22) extends radially beyond the periphery of the lid. Characterized by: 1. An apparatus according to at least one of claims 1 to 4. [6] The flat plate element (22) has a notch (28), the range of which in the circumferential direction is greater than the range of one of the segments (42, 44, 46, 53, 56) in the circumferential direction. Characterized by: 1. An apparatus according to at least one of claims 1 to 5. [7] The radial extent of the cutout (28) is at least the same as, or at least approximately the same as, the radial extent of the flat plate element (22) on the outside of the shielding lid (14). 1. An apparatus according to at least one of claims 1 to 6. [8] A tool support device (24) for the dismantling tool (26) is disposed along the inner boundary of the cutout portion (28). Characterized by: 1. An apparatus according to at least one of claims 1 to 7. [9] The demolition tool (26) is a mechanically or thermally operated demolition tool, such as a gas cutter, a plasma cutter, a cutting tool, or a grinding tool. Characterized by: 1. An apparatus according to at least one of claims 1 to 8.

[10] The diameter of the shielding cover (14) having a flat plate shape is smaller than the diameter of the opening of the container (10). Characterized by: 1. An apparatus according to at least one of claims 1 to 9.

[11] The plate element (22) is supported against the shielding lid (14), for example via roller mounts or other suitable bearings guided in rails of the plate element. Characterized by: An apparatus according to at least one of claims 1 to 10.

[12] A method for dismantling a vessel (10) of a nuclear installation, primarily a reactor pressure vessel, comprising a peripheral wall (20) and an opening surrounded by the peripheral wall, a shielding cover (14) arranged over the opening, and a dismantling tool (26) for cutting out segments (42, 44, 46, 53, 56) from the peripheral wall, the dismantling being carried out in such a way that a hollow cylindrical ring-shaped area of ​​the peripheral wall is cut into segments in stages and then the segments are removed, the remaining peripheral wall having a leading edge (58) becoming usable after the removal of the segmented hollow cylindrical ring-shaped area, the method comprising the steps of: cutting the segments (42, 44, 46, 53, 56) of the first region, which has a hollow cylindrical ring shape with the shielding lid (14) placed over the opening, in such a way that axial or vertical separation cuts (38, 48, 50, 52) extending longitudinally of the container (10) between the segments and horizontal or bottom separation cuts (40, 54, 55) extending to the bottom side, except for at least two segments (53, 56) which are support segments, are formed; removing said segments (42, 44, 46, 53, 56) separated by an axial or vertical separation cut and a horizontal or bottom separation cut while maintaining support of said shielding lid (14) on at least two remaining support segments; supporting said shield lid on said leading edge (58) of said peripheral wall (20) formed by the removal of said segments using a lowering device (30, 32, 66, 68) extending from said shield lid; forming a horizontal or bottom separation cut in said support segment; removing the support segment; and lowering the shielding lid onto the leading edge using the lowering device; A method for dismantling a container, comprising:

[13] To form the segments (42, 44, 46, 53, 56), first axial or longitudinal separation cuts (38, 48, 50, 52) and / or horizontal or bottom separation cuts (40, 54, 55) are partially made, followed by cutting the remaining areas between the segments and the peripheral wall (20). Characterized by: The method described in

[12] .

[14] the remaining areas are provided in the corner areas of the segments (42, 44, 46, 53, 56) to be cut off; Characterized by: The method described in

[13] .

[15] The support (30, 68) of the descending device contacts the leading edge of the peripheral wall (20) through a radial range that is slightly smaller than the width of the leading edge (58). Characterized by: The method according to at least one of

[12] to

[14] .

[16] using a lifting device to first radially displace the segments (42, 44, 46, 53, 56) according to the radial extent of their contact, and then lift them along the longitudinal axis of the vessel (10) in order to remove the segments (42, 44, 46, 53, 56); Characterized by: The method according to at least one of

[12] to

[15] .

[17] The segments (42, 44, 46, 53, 56) are lifted through the cutouts (28) of the annular flat-plate element (22) through which the dismantling tools (26) emerge, and the annular flat-plate element is rotatably arranged relative to the shielding lid (14) and projects radially beyond the lid. Characterized by: The method according to at least one of

[12] to

[16] .

Claims

1. A container dismantling device for dismantling a container (10) having a peripheral wall (20) and an opening surrounded by the peripheral wall, the dismantling being carried out in a manner of cutting a hollow cylindrical ring-shaped area of ​​the peripheral wall into segments in stages and then removing the segments, in which, after the removal of the segmented hollow cylindrical ring-shaped area, a leading edge portion (58) of the peripheral wall remaining becomes usable, the device comprising a shielding cover (14) arranged above the opening and a dismantling tool (26) for cutting out the segments (42, 44, 46, 53, 56) from the peripheral wall, characterised in that the shielding lid (14) has a lowering device (30, 32, 66, 68) for lowering the shielding lid stepwise onto the leading edge (58) which is each time available for use. Container dismantling equipment.

2. the vessel (10) being a reactor pressure vessel of a nuclear facility; The device according to claim 1 , characterized in that

3. The lowering device (30, 32, 66, 68) has at least two supports (30, 68) through which the shielding lid (14) can be supported. Characterized by:

3. Apparatus according to claim 1 or 2.

4. the supports are three supports arranged at 120° offset from one another; 4. The device according to claim 3, characterized in that

5. The support (30, 68) is a distal portion of a cross member (32, 66) that is movable relative to the shielding lid (14) via at least one moving mechanism, such as a cylinder, a spindle, or a rope winch. Characterized by:

5. Apparatus according to claim 3 or 4.

6. A flat plate element (22) having a shape of a ring, or more precisely, a partial ring, is arranged on the outside of the shielding lid (14) so ​​as to be rotatable relative to the shielding lid, and a dismantling tool (26) protrudes from the element. Characterized by:

6. Apparatus according to any one of claims 1 to 5.

7. The shielding lid (14) has a disk shape, and the flat plate element (22) extends radially beyond the periphery of the lid. Characterized by:

7. The apparatus of claim 6.

8. The flat plate element (22) has a notch (28) whose circumferential extension range is greater than the range of one of the segments (42, 44, 46, 53, 56) in the circumferential direction. Characterized by:

8. Apparatus according to claim 6 or 7.

9. the radial extent of the cutout (28) is at least the same as, or at least approximately the same as, the radial extent of the flat plate element (22) on the outside of the shielding lid (14), 9. The apparatus of claim 8.

10. a tool support device (24) for the dismantling tool (26) is disposed along the inner boundary of the cutout portion (28); Characterized by:

10. Apparatus according to claim 8 or 9.

11. The dismantling tool (26) is a mechanically or thermally actuated dismantling tool. Characterized by:

11. Apparatus according to any one of claims 1 to 10.

12. The apparatus of claim 11 , wherein the dismantling tool is a gas cutter, a plasma cutter, a milling tool or a grinding tool.

13. The diameter of the shielding lid (14) having a flat plate shape is smaller than the diameter of the opening of the container (10). Characterized by:

13. Apparatus according to any one of claims 1 to 12.

14. the plate element (22) is supported against the shielding lid (14) via roller mounts or other suitable bearings guided in rails of the plate element; Characterized by: Apparatus according to claim 6 or 7 or 8 or 9 or any one of claims 10 to 13 which recites claim 6 or 7 or 8 or 9.

15. A method for dismantling a container (10) having a peripheral wall (20) and an opening surrounded by said peripheral wall, said dismantling being carried out in such a way that a hollow cylindrical ring-shaped area of ​​the peripheral wall is cut into segments in stages and then the segments are removed, whereby after the removal of the segmented hollow cylindrical ring-shaped area, a leading edge (58) of the peripheral wall remaining becomes usable, said method comprising: a dismantling device comprising a shielding lid (14) arranged above the opening and a dismantling tool (26) for cutting out segments (42, 44, 46, 53, 56) from the peripheral wall, Steps in the procedure below cutting off the segments (42, 44, 46, 53, 56) of the first region, which has a hollow cylindrical annular shape with the shielding lid (14) placed over the opening, in such a way that axial or longitudinal separation cuts (38, 48, 50, 52) extending longitudinally of the container (10) between the segments and horizontal or bottom separation cuts (40, 54, 55) extending to the bottom side, except for at least two segments (53, 56) which are support segments, are formed; removing the segments (42, 44, 46, 53, 56) separated by an axial or vertical separation cut and a horizontal or bottom separation cut while maintaining support of the shielding lid (14) on at least two remaining support segments; supporting said shielding lid on said leading edge (58) of said peripheral wall (20) formed by the removal of said segments using a lowering device (30, 32, 66, 68) extending from said shielding lid; forming a horizontal or bottom separation cut in said support segment; removing the support segment; and lowering the shielding lid onto the leading edge using the lowering device; A method for dismantling a container, comprising:

16. the vessel (10) being a reactor pressure vessel of a nuclear facility; The method according to claim 15, characterized in that

17. To form the segments (42, 44, 46, 53, 56), first axial or longitudinal separation cuts (38, 48, 50, 52) and / or horizontal or bottom separation cuts (40, 54, 55) are partially performed, followed by cutting the remaining areas between the segments and the peripheral wall (20). Characterized by:

17. The method according to claim 15 or 16.

18. the remaining areas are provided in the corner areas of the segments (42, 44, 46, 53, 56) to be cut off; Characterized by:

20. The method of claim 17.

19. The support (30, 68) of the lowering device contacts the leading edge of the peripheral wall (20) through a radial range that is smaller than the width of the leading edge (58). Characterized by:

19. The method according to any one of claims 15 to 18.

20. using a lifting device to first move the segments radially according to the radial extent of their contact and then lift them along the longitudinal axis of the vessel (10) in order to remove the segments (42, 44, 46, 53, 56); Characterized by:

20. The method according to any one of claims 15 to 19.

21. The segments (42, 44, 46, 53, 56) are lifted through the cutouts (28) of the annular flat plate element (22) through which the dismantling tools (26) emerge, the annular flat plate element being rotatably arranged relative to the shielding lid (14) and projecting radially beyond the lid. Characterized by:

21. The method according to any one of claims 15 to 20.

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