JP2011209157A - Method and device for disassembling apparatus or facility, inside of which is contaminated with radioactive material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve disassembly of an apparatus or a facility, inside of which is contaminated with radioactive materials, in a state being housed in a housing body, which prevents the leakage of radioactive materials, from outside of the housing body and to reduce the volume of the secondary waste.SOLUTION: A tent 40 that can be reduced in the lateral direction of a glove box 12 is used. The glove box 12 is laid on the bottom section 42 of the tent and a support frame 30 is installed. The tent upper section 44 having the glove 48 is installed on the tent bottom section 42, and a disassembly device 50 is installed in the tent 40, and the tent upper section 44 is attached to the support frame 30 so that the reduction is guided to the lateral direction. The tent 40 is formed by bonding the tent upper section 44 and the tent bottom section 42, and a drum can 19 is connected to the tent 40 so as to be communicated in airtight state. The glove box 12 is disassembled by operating the disassembly device 50 using a glove 48 and stored in the drum can 19. The tent 40 is reduced in the lateral direction and is stored in the drum can 19.

Description

  The present invention relates to a method and an apparatus for dismantling an apparatus or equipment whose interior is contaminated with radioactive substances.

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

JP 2003-2001148 A

  By the way, the glove box used when processing a radioactive contaminant is known. Since the inside of such a glove box for treating radioactive contaminants is contaminated with a radioactive substance, it is necessary to accommodate the glove box in a container that prevents leakage of the radioactive substance when the glove box is disassembled. Here, by using a glove bag as described in Patent Document 1 as a container, an operator can disassemble the glove box from the outside of the container.

  In this case, since the inside of the glove bag as a container is contaminated with radioactive substances when the glove box is disassembled, the glove bag itself can be treated as radioactive waste, that is, secondary waste after disassembly of the glove box. This increases the capacity of secondary waste. However, in Patent Document 1, no consideration is given to processing the glove bag itself.

  In view of the above circumstances, the present invention dismantles an apparatus or facility whose interior is contaminated with radioactive substances, such as a glove box for treating radioactive pollutants, in a state of being accommodated in a container that prevents leakage of radioactive substances. It is an object of the present invention to provide a dismantling method and apparatus capable of working from the outside of the container and reducing the volume of secondary waste.

  In order to solve the above problems, a dismantling method according to the present invention is a dismantling method for disassembling a device or equipment whose interior is contaminated with a radioactive substance in a state of being accommodated in a container that prevents leakage of the radioactive substance, Using the container that can be reduced in a predetermined horizontal direction, placing the device or equipment on the container bottom that forms the bottom of the container, and placing the container in the predetermined direction A step of installing a support that can be supported to guide the reduction, and an upper portion of the housing that constitutes an upper portion of the housing and that is provided with a glove for performing work in the housing from outside the housing. Installing on the bottom of the body, attaching the upper part of the container to the support so that the shrinkage in the predetermined direction is guided, and joining the upper part of the container and the bottom of the container Body forming A step of connecting the waste storage container so as to communicate with the inside of the container in an airtight state, a step of disassembling the device or equipment using the glove, and storing the waste in the waste storage container; A step of reducing the container in the predetermined direction; and a step of storing the container reduced in the predetermined direction in the waste container.

  In the dismantling method, a bellows that can be reduced in the predetermined direction may be used as the container. The dismantling method may include a step of installing the container bottom on a floor having a vibration isolating function. Further, the disassembling method may include a step of installing a damper that supports the device or equipment between the device or equipment and the support.

  In order to solve the above problems, a dismantling apparatus according to the present invention is a dismantling apparatus including a container that accommodates a device or facility that is contaminated with a radioactive substance in a state that prevents leakage of the radioactive substance. The container is formed so as to be able to be reduced in a predetermined horizontal direction and constitutes a bottom part of the container, and a container bottom part on which the device or equipment is placed on an upper surface, and an upper part of the container. A glove for performing work inside the container from outside the container is joined to an upper part of the container connected so that the waste container communicates in an airtight state. And a support that supports the reduction in the direction.

  In the dismantling apparatus, the container may be a bellows that can be reduced in the predetermined direction. Moreover, the said dismantling apparatus may have a floor which has a vibration proof function and in which the said container bottom part and the said apparatus or installation are installed. Furthermore, the dismantling apparatus may include a damper that is installed between the apparatus or equipment and the support and supports the apparatus or equipment.

  According to the above dismantling method and apparatus, when disassembling a device or facility whose interior is contaminated with a radioactive substance in a state where it is accommodated in a container that prevents leakage of the radioactive substance, work is performed from the outside of the container. And secondary waste volume can be reduced.

It is a perspective view which shows a glove box dismantling apparatus. It is a perspective view which shows the state which reduced the tent to the horizontal direction. It is a perspective view which shows the state which accommodated the folded tent in the drum can. It is a front view for demonstrating the glove box disassembly method. It is a front view for demonstrating the glove box disassembly method. It is a front view for demonstrating the glove box disassembly method. It is a front view for demonstrating the glove box disassembly method. It is a front view for demonstrating the glove box disassembly method.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a glove box dismantling apparatus 10 according to the present embodiment. As shown in this figure, a glove box dismantling apparatus 10 includes a vibration isolating floor 20, a support frame 30 as a support installed on the vibration isolating floor 20, a glove that is supported by the support frame 30 and is to be dismantled. A tent 40 serving as a housing for housing the box 12 and a dismantling device 50 used for disassembling the glove box 12 serving as a device or equipment housed in the tent 40 and contaminated inside by a radioactive substance.

  The glove box 12 has a horizontal dimension indicated by X in the figure (hereinafter referred to as X direction) as a predetermined horizontal direction, a dimension in the depth direction indicated by Y in the figure (hereinafter referred to as Y direction), and the figure. It is larger than the dimension in the height direction (hereinafter referred to as Z direction) indicated by the middle Z, and the dimension in the Z direction is larger than the dimension in the Y direction. Further, the glove box 12 is installed in a box body 14 (see FIGS. 5 and 6) that includes a floor plate 16 and a top plate 18 joined by a pillar (not shown).

  The anti-vibration floor 20 includes a steel-made rectangular floor portion 22 and four anti-vibration rubbers 24 that support the floor portion 22. The longitudinal direction of the floor portion 22 coincides with the X direction. Moreover, each anti-vibration rubber | gum 22 is provided corresponding to each of the four corners of the floor part 22, and reduces the vibration transmitted to the floor part 22 from the ground.

  The support frame 30 includes four support columns 32, two beam portions 34 extending in the longitudinal direction of the vibration isolation floor 20, and a connecting beam portion 36 that connects the longitudinal center portions of the two beam portions 34. I have. Each column 32 is arranged corresponding to each of the four corners of the floor 22 and is fastened to the floor 22 with bolts. The two beam portions 34 are arranged side by side in the Y direction, and each beam portion 34 connects the upper end portions of the two support column portions 32 arranged in the longitudinal direction of the vibration isolation floor 20. The longitudinal end of the beam 34 and the upper end of the column 32 are fastened with bolts. Moreover, the longitudinal direction center part of the beam part 34 and the longitudinal direction edge part of the connection beam part 36 are fastened with the volt | bolt.

  The tent 40 is a substantially rectangular parallelepiped hollow body, and has a bellows structure that can be expanded and contracted in the longitudinal direction (X direction) of the anti-vibration floor 20. The tent 40 has a dimension in the X direction larger than a dimension in the Y direction and a dimension in the Z direction. Further, the tent 40 has a dimension in the Z direction larger than a dimension in the Y direction. That is, the longitudinal direction of the tent 40 matches the longitudinal direction of the glove box 12.

  Here, the tent 40 is formed by joining a tent bottom part 42 as a container bottom part laid on the floor part 22 and a tent upper part 44 as a container upper part covering the front, rear, left and right side surfaces and the upper surface of the glove box 12. Is formed. The tent upper portion 44 is formed in a rectangular shape with an open bottom surface, and an opening edge portion on the bottom side of the tent upper portion 44 and a peripheral edge portion of the tent bottom portion 42 are welded.

  Moreover, the tent upper part 44 is comprised by joining the rectangular sheet | seat which each comprises an upper surface and the front and back, right and left side surfaces. For this reason, a joining margin is provided at a corner of the tent upper portion 44.

  A plurality of through holes 44A are formed at predetermined intervals in the X direction at the joining margins existing at the upper end of the tent upper portion 44 and at both ends in the X direction. One end side of the S-shaped hanger 46 is hooked in the through hole 44A. The other end of the hanger 46 is hooked on the beam portion 34 of the support frame 30. Thereby, the tent upper part 44 is supported in the state suspended from the beam part 34 by the hanger 46.

  In addition, a plurality of globes 48 are arranged at predetermined intervals in the Z direction and the X direction of the tent upper portion 44 on the side portion of the tent upper portion 44. Each globe 48 is a cylindrical member that is integrally formed with the side portion of the tent upper portion 44 and extends into the tent 40, and the tip of the cylindrical member has a shape resembling a hand. An operator can work in the tent 40 by inserting his arm into the glove 48. The predetermined interval at which the globe 48 is arranged is set so that there is no space in the tent 40 where the worker cannot work.

  The disassembling apparatus 50 includes a tool 52 for disassembling the glove box 12 such as a nibbler or a saw, and a tool support 54 that supports the tool 52. The tool support 54 is installed on the floor board 16.

  Here, as shown in the drawing, a pair of dismantling devices 50 are installed side by side in the X direction. Thereby, the dismantling of the glove box 12 can be performed simultaneously from both sides in the X direction of the glove box 12.

  The glove box dismantling apparatus 10 includes two dampers 60 installed between the connecting beam portion 36 and the top plate 18 (see FIG. 5), an air pressure adjusting device 62 that adjusts the internal pressure of the tent 40, and a tent. 40 is provided with a pipe 64 for discharging the dismantled material, which connects the interior of 40 and the drum 19 as a waste container in an airtight state.

  One end portion of each damper 60 is attached to one end portion and the other end portion in the longitudinal direction of the connecting beam portion 36, and the other end portion of each damper 60 is attached to the top plate 18 with the tent upper portion 44 sandwiched therebetween. It is in contact with the top surface. Here, each damper 60 urges the top plate 18 downward. As a result, the box body 14 and the glove box 12 are pressed against the anti-vibration floor 20 by the urging force of the two dampers 60. That is, the box body 16 and the glove box 12 are supported from above by the damper 60 and are prevented from falling.

  The atmospheric pressure adjusting device 62 is arranged in the center portion in the X direction on the front surface of the tent upper portion 44 in the Y direction in the drawing. The atmospheric pressure adjusting device 62 includes an exhaust fan and an air supply fan connected in an airtight state to the tent 40 by a pipe 63, and adjusts the internal pressure of the tent 40 to a negative pressure.

  One end of the pipe 64 is connected in an airtight manner to the X direction central portion of the front surface of the tent upper portion 44 in the Y direction in the figure. The other end of the pipe 64 is connected to the drum 19 in an airtight state. The inner diameter of the pipe 64 is set to be large enough to pass the dismantled product of the glove box 12. The pipe 64 is formed of a material that can be cut at an intermediate portion of the pipe and welded to the cut portion, so that the pipe 64 can be divided at the intermediate portion of the pipe and the cut portion can be sealed.

  FIG. 2 is a perspective view showing a state in which the tent 40 is reduced in the X direction. As shown in this figure, after the glove box 12 is disassembled and discharged from the tent 40, the bellows-structured tent 40 is moved in the X direction by the amount the glove box 12 is disassembled along the beam portion 34 of the support frame 30. It becomes possible to reduce to. Therefore, as shown in the figure, the tent 40 can be folded down in the X direction.

  FIG. 3 is a perspective view showing a state in which the folded tent 40 is stored in the drum can 19. As shown in this figure, the tent 40 can be folded down to such an extent that it can be stored in the drum 19.

  4 to 8 are front views for explaining a method for disassembling the glove box 12. FIG. As shown in FIG. 4, first, in the dismantling method, a step of manufacturing the vibration-proof floor 20 is performed. In this step, the vibration isolating floor 20 is manufactured by attaching the vibration isolating rubber 24 to the four corners of the floor 22.

  Next, a step of placing the glove box 12 on the tent bottom 42 is performed. In this step, the tent bottom 42 is laid on the floor 22. Next, as shown in FIG. 5, the box 14 containing the glove box 12 is lifted by a suspension device. Further, before or after lifting the box 14, the anchor attached to the floor plate 16 of the box 14 is removed. Next, in a state where the box body 14 is lifted, the anti-vibration floor 20 on which the tent bottom 42 is laid is inserted under the box body 14. Then, the box body 14 is lowered onto the anti-vibration floor 20 so that the box body 14 is within the range where the tent bottom 42 is laid.

  Next, as shown in FIG. 6, a step of installing the support frame 30 is performed. In this step, the support column 32 is fastened to the floor portion 22 of the vibration-isolating floor 20 with bolts, and the support column 32, the beam portion 34, and the connecting beam portion 36 are fastened with bolts.

  Next, a process of installing the tent upper part 44 on the tent bottom part 42, installing the pair of dismantling devices 50 in the tent 40, and attaching the tent 40 to the support frame 30 is performed. In the step, first, a pair of dismantling devices 50 are installed at both ends of the tent bottom 42 in the X direction. Next, the tent upper portion 44 is installed on the tent bottom portion 42 so as to cover the upper surface of the box body 14 and the glove box 12 and the front, rear, left and right side surfaces. Then, the tent 40 is suspended from the beam portion 34 of the support frame 30 using a plurality of hangers 46. At this time, one end side of the hanger 46 is hooked in the through hole 44 </ b> A of the tent upper portion 44, and the other end side of the hanger 46 is hooked on the beam portion 34.

  Next, a process of forming the tent 40 by joining the tent upper portion 44 and the tent bottom portion 42 is performed. In this step, the opening edge part on the bottom side of the tent upper part 44 and the peripheral part of the tent bottom part 42 are welded by thermocompression bonding or the like.

  Before carrying out the process, the pipe 63 connecting the atmospheric pressure adjusting device 62 to the tent 40 and the pipe 64 connecting the drum can 64 to the tent 40 are joined in an airtight state by welding to the upper part 44 of the tent 40. Keep it.

  Next, a step of installing the pair of dampers 60 between the connecting beam portion 36 and the top plate 18 is performed. In the step, one end of each damper 60 is attached to one end and the other end in the longitudinal direction of the connecting beam portion 36, and the other end of each damper 60 is attached to the top plate 18 with the tent upper part 44 interposed therebetween. Apply to the top surface.

  Next, a process of connecting the drum 19 to the tent 40 is performed. In this process, the drum 64 is joined to the tent 40 in an airtight state by joining the pipe 64 joined to the tent upper portion 44 to the drum 19 in an airtight state.

  Next, as shown in FIG. 7, a step of disassembling the glove box 12 and storing it in the drum can 19 is performed. In this step, the dismantling work of the glove box 12 starts from both sides in the X direction of the glove box 12 and proceeds to the center side. In the dismantling work, the operator dismantles by operating the tool 52 with the arm put in the glove 48 and cutting or squeezing the glove box 12. The dismantled product is discharged to the drum can 19 through the pipe 64.

  Then, a step of reducing the tent 40 in the X direction of the glove box 12 is performed. In this step, the bellows-structured tent 40 is reduced in the X direction of the glove box 12 as the dismantling operation of the glove box 12 proceeds and the X direction length of the glove box 12 is reduced. The process may be repeated every time the dismantling operation of the glove box 12 progresses and the length of the glove box 12 in the X direction is reduced by a predetermined length, or the dismantling operation of the glove box 12 is completed. You may implement after. Further, the dismantling apparatus 50 is dismantled after the dismantling work of the glove box 12 is completed.

  Then, as shown in FIG. 8, after the disassembly of the glove box 12 is completed, a process of storing the tent 40 in the drum can 19 is performed. In this step, the tent 40 is housed in the drum can 19 in a state where the tent 40 is maximally reduced in the X direction and folded. Here, when the height of the folded tent 40 is higher than the height of the drum can 19, the tent 40 is folded up and down and the entire tent 40 is stored in the drum can 19.

  As described above, according to the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, the operator operates the tool 52 in a state through the glove 48 provided in the tent 40 to operate the glove box 12. Can be dismantled. That is, the worker can disassemble the glove box 12 accommodated in the tent 40 from the outside of the tent 40. Therefore, the operator can carry out the dismantling work of the glove box 12 accommodated in the tent 40 without wearing the explosion-proof protective clothing.

  Here, when an operator works in the tent 40 because the weight of the A-bombed protective clothing is large and the work in the room contaminated with radioactive substances should be suppressed in a short time. It is necessary to keep working time short. On the other hand, according to the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, the worker can work outside the tent 40, and therefore, the working time constraint can be relaxed.

  In addition, when an operator enters and works in the tent 40, it is necessary to separately install a facility for preventing leakage of radioactive materials for entering and leaving the room, in which the worker attaches and removes the protective clothing for the explosion, Larger equipment. However, according to the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, since the operator can work outside the tent 40, the facility for preventing leakage of radioactive materials for entering and leaving the room can be eliminated. Increase in size can be suppressed.

  Moreover, since the container which accommodates the glove box 12 to be disassembled is contaminated with radioactive material, it is necessary to treat it as secondary waste. When working in the tent 40, the tent 40 increases in size because of securing a space for the operator to enter. This increases the volume of secondary waste. However, according to the dismantling method and apparatus 10 of the glove box 12 according to the present embodiment, since the worker can work outside the tent 40, a space for the worker to enter in the tent 40 can be made unnecessary, and the facility has a large size. Can be suppressed. Thereby, the volume of secondary waste can be reduced.

  Moreover, according to the dismantling method and apparatus 10 of the glove box 12 according to the present embodiment, the tent 40 can be reduced in the X direction and folded. Thereby, the volume of secondary waste can be further reduced.

  In the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, the tent 40 can be easily reduced in the X direction by using the bellows structure that can be reduced in the X direction. Therefore, handling of the tent 40 can be facilitated.

  In the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, the movement and expansion / contraction of the tent 40 in the X direction is guided by the support frame 30. Thereby, the tent 40 can be reduced more easily in the X direction. Therefore, handling of the tent 40 can be further facilitated.

  Further, in the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, the glove box 12 is installed on the anti-vibration floor 20 having the anti-vibration function. Thereby, earthquake resistance at the time of carrying out the dismantling work of the glove box 12 can be improved.

  In the method and apparatus 10 for disassembling the glove box 12 according to the present embodiment, a damper 60 that supports the glove box 12 is installed between the glove box 12 and the support frame 30. Thereby, earthquake resistance at the time of carrying out the dismantling work of the glove box 12 can be further improved. Moreover, the stability of the attitude of the glove box 12 can be improved.

  Here, the damper 60 is disposed in the center portion in the longitudinal direction of the glove box 12, and the point of action of the downward load on the glove box 12 is set in the center portion in the longitudinal direction of the glove box 12. Thereby, the glove box 12 can be supported by the few dampers 60 without biasing the load distribution. Accordingly, it is possible to further improve the earthquake resistance when the glove box 12 is being dismantled. Moreover, the stability of the attitude of the glove box 12 can be further improved.

  In the present embodiment, the disassembling work of the glove box 12 is started from both sides in the X direction of the glove box 12 and progressed to the center side. As a result, the damper 60 disposed in the center portion in the X direction of the glove box 12 can remain until immediately before the dismantling work is completed, and the fall of the glove box 12 can be suppressed until immediately before the dismantling work is completed. it can. Moreover, the downward load application point with respect to the glove box 12 by the damper 60 can be continuously arranged in the longitudinal center of the glove box 12 during the dismantling operation. However, the operation may start from one end side of the glove box 12 in the X direction and proceed to the other end side.

  In the present embodiment, the tent 40 is configured to be reduced only in one horizontal direction. However, the tent 40 may be configured so that it can be reduced not only in one horizontal direction but also in the height direction. Thereby, the tent 40 can be folded down further and the secondary waste can be further reduced in volume.

  Furthermore, although the case where the glove box is disassembled has been described in the present embodiment, the present invention is not limited to this, and the present invention is not limited to this, but also when disassembling other devices or equipment whose interior is contaminated with radioactive substances. Applicable.

10 glove box dismantling device, 12 glove box, 14 box, 16 floor plate, 18 top plate, 19 drum can, 20 anti-vibration floor, 22 floor portion, 24 anti-vibration rubber, 30 support frame, 32 strut portion, 34 beam portion, 36 connecting beam part, 40 tent, 42 tent bottom part, 44 tent upper part, 44A through hole, 46 hanger, 48 glove, 50 dismantling device, 52 tool, 54 tool support part, 60 damper, 62 atmospheric pressure adjusting device, 63 piping, 64 Piping

Claims (8)

A dismantling method for disassembling a device or facility that has been contaminated with radioactive material inside in a state of being accommodated in a container that prevents leakage of the radioactive material,
Using the container that can be reduced in a predetermined horizontal direction,
Placing the device or equipment on the bottom of the container constituting the bottom of the container;
Installing a support that can support the container so as to guide the reduction in the predetermined direction;
An upper part of the container, which forms an upper part of the container and is provided with a glove for performing work in the container from the outside of the container, is installed on the bottom of the container and supports the upper part of the container Attaching to the body to guide the reduction in the predetermined direction;
Joining the upper part of the container and the bottom of the container to form the container;
Connecting the waste container so as to communicate with the inside of the container in an airtight state;
Disassembling the device or equipment using the globe and storing the device or facility in the waste container;
Reducing the container in the predetermined direction;
Storing the container reduced in the predetermined direction in the waste storage container;
A dismantling method comprising:   The dismantling method according to claim 1, wherein a bellows that can be reduced in the predetermined direction is used as the container.   The dismantling method of Claim 1 or Claim 2 provided with the process of installing the said container bottom part on the floor which has a vibration proof function.   The disassembly method according to any one of claims 1 to 3, further comprising a step of installing a damper that supports the device or equipment between the device or equipment and the support. A dismantling device comprising a container that accommodates a device or facility that has been contaminated with a radioactive material in a state that prevents leakage of the radioactive material,
The container is formed so as to be able to be reduced in a predetermined horizontal direction, constitutes a bottom part of the container, constitutes a container bottom on which the device or equipment is placed on an upper surface, and constitutes an upper part of the container. A glove is provided for working inside the container from outside the container, and the waste container is connected to the upper part of the container connected so as to communicate in an airtight state.
A support that supports the container so as to guide the reduction in the predetermined direction;
A dismantling device comprising:   The dismantling apparatus according to claim 5, wherein the container is a bellows that can be reduced in the predetermined direction.   The dismantling apparatus of Claim 5 or Claim 6 provided with the floor which has a vibration isolating function and in which the said container bottom part and the said apparatus or installation are installed.   The dismantling apparatus according to any one of claims 5 to 7, further comprising a damper that is installed between the apparatus or facility and the support and supports the apparatus or facility.

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