JP5759713B2 - Device or method for dismantling equipment or equipment that is internally contaminated with radioactive material - Google Patents

Description

  The present invention relates to an apparatus and a method for dismantling an apparatus or facility whose inside is contaminated with a radioactive substance.

  There is known a glove bag in which a container for storing harmful organic substances can be wrapped and sealed, and a glove for manual work from the outside is provided (see, for example, Patent Document 1). Since the glove bag is formed of a flexible sheet and deforms due to external pressing force, the glove bag is used to manually process the harmful organic matter without exposing the harmful organic matter to the outside. can do.

  Also, a glove box that can seal contaminants and harmful substances and is provided with the glove is known (see, for example, Patent Document 2). The glove box is formed of a soft film and used in a state of being hung on a frame, and can be removed from the frame, folded and discarded after use.

  Furthermore, a glove box in which a radioactive substance can be sealed and provided with the glove is known (see, for example, Patent Document 3). In the glove box, the glove is attached to the glove port so that the glove box can be replaced while keeping the sealed state of the glove box.

JP 2003-200148 A Japanese Utility Model Publication No. 3-42599 Japanese Utility Model Publication No. 6-57585

  By the way, when dismantling a glove box for treating radioactive contaminants, the inside of the glove box is contaminated with a radioactive substance. Therefore, the glove box needs to be stored in a sealed space to prevent leakage of the radioactive substance. Here, by using the glove bag described in Patent Document 1 and the glove box described in Patent Document 2, the glove box to be dismantled is housed in the sealed space inside thereof, so that the operator can move from the outside of the sealed space. You can dismantle the glove box.

  Here, when the glove port is supported by the glove bag or the glove box, a relatively large load such as the weight of the glove port or the force of the operator acts on the glove bag or the glove box. On the other hand, the glove bag described in Patent Document 1 and the glove box described in Patent Document 2 are formed of a flexible sheet and a flexible film, respectively, and have low rigidity. For this reason, when a glove port is supported by a glove bag or a glove box, the glove port is moved at the time of work, for example, the stability of the glove is lowered, and workability is deteriorated.

  The present invention has been made in view of the above circumstances, and a glove port to which a glove is attached when disassembling an apparatus or facility whose inside is contaminated with a radioactive substance without using the glove to leak the radioactive substance. It is an object of the present invention to improve the stability and improve the workability of the dismantling work.

  In order to solve the above-mentioned problem, a dismantling apparatus according to the present invention is a dismantling apparatus for disassembling an apparatus or equipment that is contaminated with a radioactive substance in a sealed space that seals the radioactive substance, Fixed to the dismantling tent that houses the device or equipment in the sealed space inside, a tent frame that supports the dismantling tent from the outside, a glove for dismantling work inserted into the sealed space, and the tent frame And a glove port to which the base of the glove is attached.

In the dismantling apparatus, the glove port may be detachable with respect to the tent frame, and the glove may be provided so as to be able to advance and retreat with respect to the sealed space. There may be provided a connecting member that connects the tent and the globe port and seals between the tent and the glove port and is extensible toward the outside of the dismantling tent .

  In the dismantling apparatus, the connecting member may be joined by welding to the globe port.

  In order to solve the above problems, a disassembly method according to the present invention is a disassembly method for disassembling an apparatus or facility that is contaminated with a radioactive substance in a sealed space that seals the radioactive substance. A tent is supported by a tent frame from the outside, and the apparatus or equipment is installed in the sealed space inside, and a glove for dismantling work is inserted into the sealed space. Attaching a root portion to the glove port, and fixing the glove port to the tent frame.

In the dismantling method, the glove port is detachably fixed to the tent frame, the glove is removably inserted into the sealed space, and the dismantling tent and the glove port are connected to the dismantling tent. A connection member that can be extended outward may be connected to seal between the dismantling tent and the globe port.

  The dismantling method includes the step of removing the glove port from the tent frame, and moving the glove port from the sealed space by moving the glove port to the opposite side of the dismantling tent while extending the connection member. A step of retracting, and a step of sealing a portion of the connecting member closer to the dismantling tent than the globe and cutting the portion.

  In the dismantling method, the connecting member may be joined by welding to the globe port.

  According to the present invention, when disassembling a device or facility whose inside is contaminated with a radioactive substance without leaking the radioactive substance using a glove attached to the glove port, the stability of the glove port is improved, and the dismantling is performed. The workability of the work can be improved.

It is a front view which shows the demolition apparatus which concerns on one Embodiment. It is a side view which shows the dismantling apparatus which concerns on one Embodiment. It is a front view which shows a glove port. It is a fragmentary sectional side view which shows a part of glove port by a side cross section, and shows another part by a side surface. It is a sectional side view which shows a glove port. It is an expanded sectional view which expands and shows a joining member. It is a front view which shows a glove port. It is a fragmentary sectional side view which shows a part of glove port by a side cross section, and shows another part by a side surface. It is a sectional side view which shows a glove port. It is an expanded sectional view which expands and shows a joining member. It is a fragmentary sectional side view for demonstrating the method of removing a glove. It is a fragmentary sectional side view for demonstrating the method of removing a glove.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view illustrating a dismantling apparatus 10 according to an embodiment, and FIG. 2 is a side view illustrating the disassembling apparatus 10. As shown in these drawings, the dismantling apparatus 10 includes a tent frame 30, a dismantling tent 40 that is supported by being suspended by the tent frame 30 and that accommodates a glove box 20 to be dismantled, and a glove 12 for dismantling work. And glove ports 50 and 60 to which the globe 12 is attached, respectively. The front side in the depth direction in FIG. 1, the left side in FIG. 2 is referred to as the front side, and the opposite side is referred to as the rear side.

  The dismantling tent 40 accommodates dismantling tools such as nibblers and saws used for dismantling the glove box 20. In addition, the glove box 20 is a transparent box whose inside is a sealed space, and accommodates equipment contaminated with radioactive substances. A plurality of working gloves having the same configuration as that of the glove 12 are provided on the side surface of the glove box 20, and the plurality of gloves are inserted into the glove box 20. The operator can work in the glove box 20 by inserting an arm into the glove.

  The tent frame 30 is a rectangular parallelepiped steel frame installed on the floor surface on which the glove box 20 is placed, and each of the four columns 32 has four upper portions, a central portion, and a lower portion. The beams 33, 34 and 35 are connected to each other.

  The dismantling tent 40 is a rectangular parallelepiped hollow body made of a flame-retardant soft and highly airtight sheet material such as a flame-retardant soft vinyl chloride film. The dismantling tent 40 is formed by sealingly sealing a bottom portion 40A on which a glove box 20 is placed and a top portion 40B having an open lower end, and a sealed space 41 inside. Is forming. Moreover, the tent 40 can be crushed and folded by being formed of a flexible material. Furthermore, since the tent 40 is formed of a transparent or translucent material, the inside thereof can be visually recognized.

  A number of string passage holes are formed at the edge of the dismantling tent 40, and a string 46 inserted through the string passage hole is tied to the tent frame 30. Accordingly, the dismantling tent 40 is stretched over the tent frame 30 and supported in a suspended state. Further, a pair of left and right gloves 12 are disposed on the front surface and the rear surface of the dismantling tent 40, respectively. Each glove 12 is a cylindrical member extending inside the dismantling tent 40, and the tip of the cylindrical member has a shape resembling a hand. The operator can work in the dismantling tent 40 by inserting his arm into the globe 12. A plurality of pairs of globes 12 may be provided on the front and rear surfaces of the dismantling tent 40.

  The glove ports 50 and 60 are arranged side by side on the front side and the rear side of the tent frame 30. The globe port 50 is formed in an annular shape and is supported by the middle beam 34 on the front side and the rear side of the tent frame 30 via a pair of columnar fixing fittings 52. The pair of fixing brackets 52 are arranged in parallel to the left and right so as to extend vertically, and are fixed by being fastened to the middle beam 34 on the front side and the rear side of the tent frame 30 with bolts. The globe port 50 is disposed between the pair of fixing brackets 52 and is fixed to the pair of fixing brackets 52 by fastening with bolts.

  Similarly, the globe port 60 has an annular shape and is supported by the middle beam 34 on the front side and the rear side of the tent frame 30 via a pair of fixing fittings 62. The pair of fixing brackets 62 are arranged in parallel to the left and right so as to extend vertically, and are fixed by being bolted to the middle beam 34 on the front side and the rear side of the tent frame 30 with bolts. The globe port 60 is disposed between the pair of fixing brackets 62 and is fixed to the pair of fixing brackets 62 by fastening with bolts.

  3 is a front view showing the glove port 50, FIG. 4 is a partial side cross-sectional view showing a part of the glove port 50 in a side cross-section, and the other part in a side view, and FIG. It is a sectional side view which shows this by a side section. As shown in these drawings, the globe port 50 includes an outer ring 54 fixed to a pair of fixing fittings 52 and an inner ring 56 press-fitted into the outer ring 54.

  The outer ring 54 is a ring-shaped member made of a synthetic resin such as vinyl chloride, and a flange portion 54 </ b> A projecting outward is formed at one axial end portion. The inner ring 56 is a ring-shaped member made of a synthetic resin such as polyethylene, and the large-diameter portion 56 </ b> A on one end side in the axial direction (the dismantling tent 40 side) is press-fitted into the outer ring 54. Further, a small diameter portion 56B having a smaller diameter than the large diameter portion 56A is formed on the other axial end side of the inner ring 56 (on the opposite side of the dismantling tent 40). Here, a pair of O-rings 57 are arranged between the large-diameter portion 56A and the outer ring 54, and the large-diameter portion 56A and the outer ring 54 are sealed in an airtight state by the O-ring 57. Yes.

  In addition, the globe 12 is inserted through the inner ring 56 with its tip end directed toward the dismantling tent 40, and the base portion of the globe 12 is folded back and covered with the outer peripheral surface of the small diameter portion 56B. ing. In addition, a pair of O-rings 58 and a fastening bracket 59 are disposed on the outer peripheral surface of the inner ring 56. A pair of O-rings 58 is arranged on the inner peripheral side of the fastening bracket 59, and the root portion of the globe 12 is sandwiched between the pair of O-rings 58 and the outer peripheral surface of the small diameter portion 56B. The pair of O-rings 58 and the small diameter portion 56 </ b> B are tightened in a state where the root portion of the globe 12 is sandwiched. As a result, the space between the root portion of the globe 12 and the small diameter portion 56 </ b> B is sealed in an airtight state by the O-ring 58.

  An opening 40C for inserting the globe 12 is formed on the front surface and the rear surface of the dismantling tent 40, and the flange portion 54A and the peripheral portion of the opening 40C of the dismantling tent 40 are connected to each other. The members 70 are connected in an airtight state. Thereby, the sealing performance of the dismantling tent 40 is ensured.

  The connecting member 70 is a cylindrical member made of a flame retardant soft synthetic resin such as a flame retardant soft vinyl chloride, and includes a bellows structure portion 72, and can be expanded and contracted when the bellows structure portion 72 is bent and stretched. An opening edge portion on one end side of the connecting member 70 in the expansion / contraction direction is joined to the peripheral edge portion of the opening portion 40 </ b> C of the dismantling tent 40, and an opening edge portion on the other end side is joined to the globe port 50. Here, the fixing bracket 52 is disposed in the vicinity of the opening 40C of the dismantling tent 40, and the gap between the globe port 50 and the opening 40C of the dismantling tent 40 is narrow. For this reason, the connection part 70 is distribute | arranged between the glove port 50 and the dismantling tent 40 in the state which reduced the bellows structure part 72 to the maximum.

  FIG. 6 is an enlarged cross-sectional view showing the joining member 70 in an enlarged manner. As shown in this figure, the bellows structure portion 72 has a plurality of annular sheet materials 72A suitable for heat welding, such as vinyl chloride, arranged in a bellows shape, and the adjacent sheet materials 72A are connected to a bellows peak portion. It is formed by welding with a trough. In addition, cylindrical portions 74 and 76 made of a material suitable for heat welding such as vinyl chloride are welded to one end and the other end of the connecting member 70 in the expansion and contraction direction, respectively. The opening edge of the cylindrical portion 74 is welded to the peripheral edge of the opening 40C of the dismantling tent 40 made of a material suitable for heat welding such as vinyl chloride, and the opening edge of the cylindrical portion 76 is chlorided. It is welded to the flange portion 54A of the outer ring 54 made of a material suitable for heat welding such as vinyl.

  7 is a front view showing the glove port 60, FIG. 8 is a partial side cross-sectional view showing a part of the glove port 60 in a side cross-section, and the other part in a side view, and FIG. It is a sectional side view which shows this by a side section. As shown in these drawings, the glove port 60 is fixed by being sandwiched between the outer ring 64 that is formed into two parts by the flange 63 and the ring 65, rather than the connection member 80 being welded to the outer ring 64. The point is different.

The outer ring 64 includes an annular plate-like flange 63 made of a synthetic resin such as polyethylene fixed to a pair of fixing fittings 62, and a ring 65 made of a synthetic resin such as polyethylene fastened to the flange 63 with a bolt. ing. Ring 65 has a flange portion 65A which is fastened superimposed flange 63 with bolts, and the annular portion 65B of the large-diameter portion 5 6A of the inner ring 5 6 is press-fitted is configured that is formed integrally. The small-diameter portion 56B of the inner ring 56 protrudes from the annular portion 65B to the opposite side of the dismantling tent 40. Here, a pair of O-rings 57 are arranged between the large-diameter portion 56A and the circular tubular portion 65B, and the large-diameter portion 56A and the annular portion 65B are sealed in an airtight state by the O-ring 57. Has been.

  Here, the glove port 60 and the peripheral edge portion of the opening 40C of the dismantling tent 40 are connected in an airtight state by the connection member 80, so that the sealing property of the dismantling tent 40 is ensured. The connecting member 80 is a cylindrical member made of a flame retardant soft synthetic resin such as flame retardant soft vinyl chloride, and includes a bellows structure portion 82 that expands and contracts when the bellows structure portion 82 bends and stretches. An opening edge portion on one end side of the connecting member 80 in the expansion / contraction direction is joined to the peripheral edge portion of the opening portion 40 </ b> C of the dismantling tent 40, and an opening edge portion on the other end side is joined to the globe port 60.

  Further, the fixing bracket 62 is disposed in the vicinity of the opening 40C of the dismantling tent 40, and the interval between the globe port 60 and the opening 40 of the dismantling tent 40 is narrow. For this reason, the connection member 80 is disposed between the globe port 60 and the dismantling tent 40 in a state where the bellows structure portion 82 is reduced to the maximum.

FIG. 10 is an enlarged cross-sectional view showing the connecting member 80 in an enlarged manner. Sheet As shown in this figure, the bellows structure 82, like the bellows structure 7 2, a plurality of annular sheet material 82A that is suitable for heat welding of vinyl chloride or the like is arranged in a bellows, flanked The members 82A are formed by welding the bellows peak and valley portions. Further, a peak portion 84 having a mountain shape in cross section made of a material suitable for heat welding such as vinyl chloride is welded to one end of the connecting member 80 in the expansion / contraction direction. Further, the opening edge of the bellows structure portion 82 is welded to the peripheral edge of the opening 40C of the dismantling tent 40, and the opening edge of the peak portion 84 is sandwiched between the flange 63 and the ring 65.

  Here, the flange 63 and the flange portion 65A of the ring 65 are fastened by bolt fastening, and an O-ring 68 is provided on the flange portion 65A so as to face the opening edge of the peak portion 84. Thereby, the opening edge part of the peak part 84 is being fixed to the glove port 60 in the airtight state.

  11 and 12 are partial side sectional views for explaining a method of removing the globe 12. In addition, although the method of removing the globe 12 attached to the globe port 50 will be described as an example, the globe 12 attached to the globe port 60 is also removed by the same method.

  As shown in FIG. 11, when removing the globe 12, first, the bolts that fix the fixture 52 and the globe port 50 are removed. Next, as shown in the drawing, the glove port 50 is moved to the opposite side of the dismantling tent 40 while the bellows structure portion 72 of the connection member 70 is extended. Thereby, the globe 12 is extracted from the dismantling tent 40.

  Next, as shown in FIG. 12, in a state where the globe 12 is moved toward the globe port 50, the portion of the bellows structure portion 72 closer to the dismantling tent 40 than the globe 12 is pressurized and heated, so that this portion is Weld in a closed state. As a result, the sealing portion 70 </ b> A is formed in a part of the connection member 70 closer to the dismantling tent 40 than the globe 12. Therefore, a sealed space 71 for accommodating the globe 12 is formed on the connection member 70 on the globe port 50 side. Further, the opening 40C of the dismantling tent 40 is sealed by the sealing portion 70A.

  Then, the connection member 70 is cut so as not to open the sealing portion 70A at the position of the sealing portion 70A. As described above, the glove 12 can be detached from the dismantling device 10 while keeping the inside of the dismantling tent 40 in a sealed state and sealing the glove 12 in the connecting member 70. The globe 12 removed from the dismantling device 10 is discarded together with the globe port 50 and the connection member 70.

  As described above, in the disassembling apparatus 10 according to the present embodiment, the glove ports 50 and 60 attached to the root portion of the globe 12 are fixed to the tent frame 30. That is, the glove 12 for dismantling work is not supported by the soft dismantling tent 40, but is supported by the tent frame 30 that is a steel frame and has higher rigidity than the dismantling tent 40. Thereby, since the weight of the glove ports 50 and 60, the operator's force, and the like can be received by the tent frame 30, the glove ports 50 and 60 are prevented from moving during work, and the stability of the glove 12 during work is improved. Therefore, workability can be improved. Further, since it is possible to prevent a large load from acting on the dismantling tent 40, damage to the dismantling tent 40 can be prevented.

  Further, in the dismantling apparatus 10 according to the present embodiment, the glove ports 50 and 60 are detachable from the tent frame 30, and the glove 12 is provided so as to be able to advance and retreat with respect to the sealed space 41 in the dismantling tent 40. ing. Further, the dismantling tent 40 and the globe ports 50 and 60 are joined and sealed between the connecting members 70 and 80 that can be expanded and contracted in the advancing and retreating direction of the globe 12.

  Thereby, at the time of work, since the connection member 70 can be contracted and the glove ports 50 and 60 can be brought close to the dismantling tent 40, the globe 12 can be inserted deeper into the dismantling tent 40. . Further, when removing the glove 12 from the dismantling device 10, the connection member 70 can be extended to separate the glove ports 50, 60 from the dismantling tent 40, so that the glove 12 can be extracted from the dismantling tent 40. In addition, a space for performing the above-described sealing operation, cutting operation, and the like can be secured between the dismantling tent 40 and the globe ports 50 and 60. Further, an opening 40C for inserting the globe 12 is formed in the dismantling tent 40, and a sealing space by the connection member 70 and the globe port 50 and a sealing by the connection member 80 and the globe port 60 are formed outside the opening 40C. By forming the space, leakage of radioactive material from the opening 40C can be prevented.

  Further, in the disassembling apparatus 10 according to the present embodiment, the joining member 70 and the flange portion 50A of the globe port 50 which are both made of a material suitable for heat welding are joined together by welding. Here, the outer ring 54 of the globe port 50 can be made thinner as compared to the case where the joining member 80 is sandwiched and fixed between a pair of members like the globe port 60. Here, since the globe port 50 becomes industrial waste after the end of the work, it is possible to obtain an effect that the volume of industrial waste can be reduced.

  Moreover, in the dismantling apparatus 10 which concerns on this embodiment, after completion | finish of the dismantling operation | work of the glove box 20, the process which removes the glove ports 50 and 60 from the tent frame 30 is implemented, and then the glove ports 50 and 60 are connected. A step of retracting the globe 12 from the dismantling tent 40 is performed by moving the members 70 and 80 to the opposite side of the dismantling tent 40 while extending. And the site | part of the tent 40 for disassembly rather than the globe 12 of the connection members 70 and 80 is sealed, and the process of cut | disconnecting the sealing part 70A is implemented. Thereby, while keeping the inside of the dismantling tent 40 in a sealed state, the globe 12 can be removed from the dismantling apparatus 10 in a state where the globe 12 is sealed in the connecting member 70.

  In addition, the above-mentioned embodiment is for making an understanding of this invention easy, and does not limit this invention. It goes without saying that the present invention can be changed and improved without departing from the gist thereof, and that the present invention includes equivalents thereof.

  For example, in the above-described embodiment, the connection members 70 and 80 are provided with the bellows structure portions 72 and 82, respectively. However, the connection members 70 and 80 are configured to be extendable and retractable in the advancing and retreating direction of the globe 12. Good. In the above-described embodiment, the connection members 70 and 80 are provided. However, when the glove 12 is provided integrally with the dismantling tent 40 and the opening 40C does not exist in the dismantling tent 40, the connecting members 70 and 80 are provided. May not be provided.

  Further, in the above-described embodiment, the globe ports 50 and 60 having different configurations are provided, but only one of the globe ports 50 and 60 may be provided. Furthermore, although the case where the contaminated glove box is disassembled has been described in the above-described embodiment, the present invention is not limited to this, and other devices or equipment whose interior is contaminated with radioactive substances other than the contaminated glove box are disassembled. It can also be applied to cases.

10 dismantling device, 12 globe, 20 glove box (device or equipment contaminated with radioactive material inside), 30 tent frame, 32 columns, 33-35 beams, 40 dismantling tent, 40A bottom, 40B top, 40C opening, 41 Sealing space, 42 String through hole, 46 String, 50 Globe port, 52 Fixing bracket, 54 Outer ring, 54A Flange, 56 Inner ring, 56A Large diameter, 56B Small diameter, 57, 58 O-ring, 59 Fastening bracket , 60 globe port, 62 fixing bracket, 63 flange, 64 outer ring, 65 ring, 65A flange portion, 65B annular portion, 68 O-ring, 70 connecting member, 70A sealing portion, 71 sealed space, 72 bellows structure portion, 72A sheet material, 74, 76 cylindrical part, 80 connecting member, 2 bellows structure section, 82A sheet material 84 Yamabe

Claims (7)

A dismantling device for disassembling a device or equipment contaminated with radioactive material inside in a sealed space for sealing the radioactive material,
A dismantling tent that houses the device or equipment in the sealed space inside;
A tent frame that supports the dismantling tent from the outside;
A glove for dismantling work inserted into the sealed space;
A glove port fixed to the tent frame and attached to the base of the glove;
A dismantling device comprising: The glove port is detachable from the tent frame,
The glove is provided so as to be able to advance and retreat with respect to the sealed space,
The disassembling apparatus according to claim 1, further comprising a connecting member that connects the dismantling tent and the glove port and seals between them, and is extensible toward the outside of the dismantling tent .   The disassembling apparatus according to claim 2, wherein the connecting member is joined to the globe port by welding. A dismantling method for disassembling a device or equipment that is contaminated with radioactive material inside in a sealed space that seals the radioactive material,
Installing a dismantling tent supported from the outside by a tent frame so that the device or equipment is accommodated in the sealed space inside;
Inserting a glove for dismantling work into the sealed space, attaching a base portion of the glove to a glove port, and fixing the glove port to the tent frame;
A dismantling method comprising: The glove port is detachably fixed to the tent frame,
The glove is inserted into the sealed space so as to be able to advance and retract,
The said dismantling tent and the said globe port are connected with the connection member which can be extended toward the outer side of the said dismantling tent, and the space | interval of the said dismantling tent and the said globe port is sealed. Dismantling method. Removing the glove port from the tent frame;
Retreating the glove from the sealed space by moving the glove port to the opposite side of the dismantling tent while extending the connecting member;
Sealing the part on the side of the dismantling tent from the globe of the connecting member, and cutting the part;
A dismantling method according to claim 5.   The disassembly method according to claim 5 or 6, wherein the connection member is joined to the globe port by welding.

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