JP5783875B2 - 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.

  A glove bag or a glove box is known which can enclose and seal an object contaminated with a harmful substance such as a radioactive substance and is provided with a glove for manual work from the outside (for example, Patent Documents 1 to 3). reference). By using such a glove bag or glove box, an object contaminated with a harmful substance can be manually processed without leaking the harmful substance to the outside.

  Further, in the glove box described in Patent Document 3, a glove is attached to a glove port provided with an inner ring for sealing so that the glove can be exchanged while keeping the sealed state in 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 disassembling a glove box for treating radioactive contaminants, the glove box is contaminated with radioactivity, and thus needs to be stored in a sealed space in order to prevent leakage of radioactive substances. Therefore, a dismantling target glove box can be disassembled from outside the sealed space by installing a dismantling tent large enough to accommodate the dismantling target glove box and inserting the glove into the tent. .

  Here, when exchanging the glove of the tent, in order to prevent leakage of radioactive material, it can be exchanged while maintaining the sealed state of the connection part between the glove and the tent, as in the glove box described in Patent Document 3. It is necessary to. However, in the glove box described in Patent Document 3, in order to prevent leakage of harmful substances to the outside when replacing the glove, the inner ring is provided in multiple layers, and the configuration of the glove port is complicated. In addition, the glove port is heavy, and a load is applied to the tent.

  The present invention has been made in view of the above circumstances, and it is possible to replace a glove in a state in which leakage of radioactive materials is prevented without complicating and increasing the weight of the connection part between the dismantling tent and the glove. It is what makes it a subject.

  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, A tent that forms the sealed space and accommodates the device or equipment, a tent provided with an opening for inserting a glove into the sealed space, a replacement glove, and an edge of the opening in the tent A glove connection body that is connected to each other in a sealed state, and the glove connection body is an endless belt-like sheet material configured to be able to reverse the front and back, and an opening edge of the glove connection body and an edge of the opening in the tent An endless belt-like body that can be joined and inserted into the tent, and reversed from the state and projecting out of the tent, and the endless belt in a state of projecting out of the tent An annular sheet material projecting on the outer peripheral side from the body, comprising a welding margin of the root side of the glove for the exchange of state everted is welded, the.

  In the dismantling apparatus, a plurality of the globe connection bodies may be provided in a state where the endless belt-like bodies are overlapped.

  Further, the dismantling method according to the present invention is a dismantling method in which the dismantling apparatus is used to dismantle the apparatus or equipment, and is sealed at the base of a used glove connected to the edge of the opening in the tent. A step of attaching a fastener, a state in which the glove connector is protruded out of the tent, and a base side of the replacement glove in an inverted state is welded to the welding margin of the glove connector, Cutting the used glove by operating a tool prepared in the tent through a glove provided in the vicinity of the glove on the tip side of the sealing tool, the replacement glove, and the replacement glove A step of inverting the front and back of the glove connector welded to the glove and pushing it into the tent, and removing the sealing tool from the replacement glove.

  ADVANTAGE OF THE INVENTION According to this invention, the replacement | exchange of the glove in the state which prevented the leakage of the radioactive substance can be enabled, without making the connection part of the tent for dismantling and the glove complicated and heavy.

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 sectional side view which expands and shows the glove | globe of a use condition and a glove | globe connection part. It is a sectional side view which expands and shows the glove | globe connection part at the time of replacing | exchanging a glove. It is a figure which shows the procedure which replaces | exchanges a used glove and the glove for replacement | exchange. It is a figure which shows the procedure which replaces | exchanges a used glove and the glove for replacement | exchange. It is a figure which shows the procedure which replaces | exchanges a used glove and the glove for replacement | exchange. It is a figure which shows the procedure which replaces | exchanges a used glove and the glove for replacement | exchange.

  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 the glove box 20 to be dismantled, and a dismantling work glove. 12 and a globe connecting portion 50 for connecting the globe 12 to the tent 40 in an exchangeable manner. 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.

  In the tent 40, a disassembly tool (not shown) such as a nibler or a saw used for disassembling the glove box 20, a cap 16 (see FIGS. 4 to 7) described later, and the like are accommodated. 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 work gloves (not shown) used for work in the glove box 20 are provided on the side surface of the glove box 20.

  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 and 35 are connected to each other.

  The 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. In addition, the 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 to form a sealed space 41 therein. doing. 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 tent 40, and a string 46 inserted through the string passage hole is tied to the tent frame 30. Thereby, the tent 40 is stretched around the tent frame 30 and supported in a suspended state.

  A plurality of globes 12 are arranged vertically and horizontally on the front surface and the rear surface of the tent 40, respectively. Each globe 12 is a tubular member made of a flame-retardant soft and highly airtight sealing material such as a vinyl acetate film, and is connected to the tent 40 via a globe connection portion 50. In addition, a urethane hand portion 13 simulating a hand is provided at the tip of each globe 12, and an operator can perform an operation in the tent 40 by inserting an arm into the globe 12. it can.

  FIG. 3 is an enlarged side sectional view showing the globe 12 and the globe connection portion 50 in use. As shown in this figure, the globe connecting portion 50 is welded to the edge of the circular opening 44 of the tent 40, and the globe 12 is welded to the globe connecting portion 50. The illustrated globe 12 is welded to the globe connection portion 50 when the tent 40 is manufactured, and is replaced with a replacement globe 12 ′ (see FIG. 4) when broken.

  The globe connection section 50 includes a plurality of (for example, five as shown) connection bodies 51, 52, 53, 54, and 55. The connection bodies 51 to 55 are endless belt-like bodies 51C to 55C formed in an endless belt shape (that is, a short cylindrical shape) with a flame-retardant soft and highly airtight sheet material such as a vinyl acetate film, and the tent 40 side. There are provided welding margins 51A to 55A and welding margins 51B to 55B respectively welded to the opening edge and the opening edge on the opposite side. The welding allowances 51A to 55A are annular sheet materials projecting from the endless belt-like bodies 51C to 55C to the outer peripheral side. Further, the welding allowances 51B to 55B are annular sheet materials projecting from the endless belt-like bodies 51C to 55C to the inner peripheral side in the state shown in FIG. 3, and are formed in a polygonal shape (for example, an octagonal shape).

  Endless belt-like bodies 51C to 55C are provided so as to overlap in the radial direction, endless belt-like body 51C is provided on the outermost peripheral side, and endless belt-like bodies 52C, 53C, 54C, and 55C are arranged in the order of outer circumference to inner circumference It is provided to overlap. Here, the lengths of the endless belts 51C to 55C are different, the endless belt 51C on the outermost peripheral side is the longest, and the endless belts 52C, 53C, 54C, and 55C are in a predetermined length (for example, 30 mm each). ) It will be shorter.

  The welding allowances 51A to 55A are welded to the edge of the opening 44 in the tent 40 directly or via other welding allowances 51A to 55A. That is, the welding allowance 51A is welded directly to the edge of the opening 44 in the tent 40, and the welding allowance 52A is welded on the welding allowance 51A. The welding allowance 53A is welded onto the welding allowance 52A, the welding allowance 54A is welded onto the welding allowance 53A, and the welding allowance 55A is welded onto the welding allowance 54A.

  A base portion of the globe 12 is provided with a welding allowance 14 having a polygonal shape (for example, octagonal shape) extending in the inner diameter direction, and the welding allowance 14 is welded to the welding allowance 51B. The welding allowances 51B to 55B are arranged inside the tent 40, and are arranged from the inside to the outside of the tent 40 in the order of the welding allowances 51B, 52B, 53B, 54B, and 55B.

  FIG. 4 is an enlarged side cross-sectional view of the globe connection portion 50 when the globe 12 is replaced. As shown in this figure, the connection bodies 52 to 55 of the globe connection portion 50 are pulled out and protrude out of the tent 40 by being turned over from the state of being pushed into the tent 40 shown in FIG. In this state, the longest connection body 52 is provided on the innermost peripheral side, and the connection bodies 53, 54, and 55 are provided in an overlapping manner from the inner peripheral side to the outer peripheral side. The welding margins 52B to 55B are arranged outside the tent 40, and are arranged in the order of the welding margins 52B, 53B, 54B, and 55B from the far side to the near side with respect to the tent 40.

  As shown in FIG. 4, the replacement glove 12 ′ is turned upside down with respect to the use state, that is, the welding allowance 14 is projected from the root portion to the outer peripheral side, and the welding allowance 14 is set to the welding allowance 52 </ b> B. It can connect to the connection body 52 by welding to. At the same time, the welding operation of the replacement globe 12 ′ and the connection body 52 is performed with the cap 16 attached to the base of the used globe 12 to be replaced. Here, the cap 16 is a sealing tool for sealing the base portion of the used globe 12 to be replaced, and is sealed by sandwiching the base portion of the globe 12 with a pair of opposing elastic pieces. .

  5-8 is a figure which shows the procedure which replace | exchanges the used glove 12 and replacement | exchange glove 12 'which needed to be replaced | exchanged by having been used and damaged. As shown in FIG. 5, first, the cap 16 is attached to the base of the used globe 12 to be replaced, and the base of the globe 12 is sealed. Here, the cap 16 is installed in the tent 40 and the work is performed using the globe 12 installed next to the used globe 12 to be replaced.

  Next, as shown in FIG. 6, the replacement globe 12 ′ is welded to the connection body 52. At that time, first, the connection bodies 52 to 55 are turned over and pulled out of the tent 40. And the sealer 60 welds both the polygon welding allowance 14 'and the welding allowance 52B for each side. Here, the sealer 60 is a welding machine provided with a pair of opposed rod-shaped heating bodies, and these paired heating bodies are heated under pressure by sandwiching the welding allowance 14 'and the welding allowance 52B. Can be welded.

  Next, as shown in FIG. 7, the used globe 12 to be replaced is cut from the root portion. Here, a tool for cutting the glove 12 is installed in the tent 40, and the glove 12 is cut by operating the tool through the glove 12 installed next to the used glove 12 to be replaced. To do.

  Next, as shown in FIG. 8, the replacement glove 12 welded to the welding allowance 52 </ b> B is turned over and pushed into the tent 40, so that the cap 16 is pushed and removed from the root of the remaining glove 12. The tip of 51 is opened. Then, the connection body 52 is turned over and further pushed into the tent 40 together with the globe 12, and the connection bodies 53 to 55 are turned over and pushed into the connection body 52.

  As described above, the used globe 12 to be exchanged and the exchange globe 12 'are exchanged. Next, when the globe 12 is exchanged, the exchange globe 12' is connected to the connection body 53. Next, it is welded to the connection body 54, and finally, it is welded to the connection body 55. That is, in the disassembling apparatus 10 according to the present embodiment, the four globe replacement connectors 52 to 55 are provided, so that the globe 12 can be replaced four times.

  Here, by sealing the base part of the used globe 12 to be replaced with the cap 16, it is possible to prevent the radioactive substance from leaking outside the tent 40 through the used globe 12 to be replaced. Further, welding margins 52A to 55A provided over the entire circumference of the endless belt-like bodies 52C to 55C are welded over the whole circumference of the edge of the opening 44 of the tent 40 so as to cover the whole circumference of the endless belt-like bodies 52C to 55C. By welding the welding allowances 52B to 55B provided to the welding allowance 14 'provided over the entire circumference of the base part of the replacement globe 12', the replacement globe 12 'and the connecting bodies 52 to 55 are used. The glove connection 50 can be sealed. Furthermore, the outside of the replacement glove 12 ′ in the inverted state, that is, the side on which the operator puts his / her hand does not touch the air in the tent 40.

  Therefore, the globe 12 can be exchanged in a state in which leakage of the radioactive material is prevented without requiring a complicated structure such as a complicated sealing mechanism or a detachable mechanism in the globe connecting portion 50. Moreover, since the globe connection part 50 can be comprised with a flame-retardant soft sheet | seat material and the glove port which is a heavy article can be made unnecessary, the load concerning a tent 40 can be reduced and the mechanism which supports a glove port can also be made unnecessary. . Furthermore, since the glove connection part 50 can be reduced in weight, restrictions on the number of installations and installation locations of the globes 12 due to the load applied to the tent 40 can be reduced, and the number of installations of the globes 12 and the degree of freedom of installation locations are expanded. can do.

  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 case where the contaminated glove box is disassembled has been described. However, 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. In the above-described embodiment, the globe 12 attached to the tent 40 is first welded to the connection body 51, but the globe 12 may be directly joined to the edge of the opening 44 of the tent 40. Furthermore, the number of the connecting bodies 51 to 55 may be determined as appropriate according to the number of replacements of the globe 12, and when the number of replacements is one, two or one may be provided.

10 dismantling device, 12, 12 'globe, 13 hands, 14, 14' welding allowance, 16 cap (sealing tool), 20 glove box (device or equipment contaminated with radioactive material inside), 30 tent frame, 32 pillar, 33, 35 beam, 40 tent, 40A bottom, 40B top, 41 sealed space, 42 string through hole, 44 opening, 46 string, 50 globe connection, 51, 52, 53, 54, 55 connection body (globe Connection body), 51A, 52A, 53A, 54A, 55A, 51B, 52B, 53B, 54B, 55B Welding allowance, 51C, 52C, 53C, 54C, 55C Endless belt, 60 Sealer

Claims (3)

A dismantling device for disassembling a device or equipment contaminated with radioactive material inside in a sealed space for sealing the radioactive material,
A tent that forms the sealed space and accommodates the device or equipment, and a tent provided with an opening for inserting a glove in the sealed space;
A glove connector for connecting the replacement glove and the edge of the opening in the tent in a sealed state;
The globe connector is
It is an endless belt-like sheet material configured so that it can be turned upside down, and its opening edge is joined to the edge of the opening in the tent and inserted into the tent, and the tent is turned upside down from the state. An endless belt that can assume a state of protruding outward,
An annular sheet material projecting from the endless belt-like body in the state of projecting out of the tent to the outer peripheral side, and a welding allowance for welding the base side of the replacement glove in an inverted state;
A dismantling device comprising:   The disassembling apparatus according to claim 1, wherein a plurality of the globe connection bodies are provided in a state where the endless belt-like bodies are overlapped. A dismantling method for disassembling the apparatus or equipment using the disassembling apparatus according to claim 1 or 2,
Attaching a seal to the base of a used glove connected to the edge of the opening in the tent;
A state of projecting the globe connection body out of the tent and welding the base side of the replacement globe in an inverted state to the welding allowance of the globe connection body;
Cutting the used glove by operating a tool prepared in the tent through a glove provided in the vicinity of the glove on the tip side of the sealing tool;
The replacement glove and the glove connection body welded to the glove are reversed and pushed into the tent, and the sealing tool is removed from the replacement glove,
A dismantling method comprising:

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