Device disposal method and device manufacturing method

Abstract

To provide a device disposal method that suppresses the burden accompanying disposal processing with respect to an installation facility, and to provide a device manufacturing method.SOLUTION: In a device disposal method, in a carry-out process (step S20), a device 50 arranged in a radiation environment where radiation rays have acted is carried out from an installation facility 100. Further, in a dismantling process (step S130), dismantling work of the device 50 is performed at a place 110 other than the installation facility 100. Accordingly, at the installation facility 100 where the device 50 is used to be installed, dismantling work of the device 50 no longer has to be performed after conducting the carry-out process. At the other place 110, there are no width restrictions during operation of the device 50, as in the installation facility 100, thereby allowing dismantling of the device 50 to be performed in an environment suitable for dismantling work. Thus, the burden accompanying disposal processing with respect to the installation facility 100 can be suppressed.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for disposing of equipment and a method for manufacturing equipment. [Background technology]

[0002] Conventionally, a known example of equipment installed in an installation facility is the equipment shown in Patent Document 1. The equipment shown in Patent Document 1 is a self-shielded cyclotron that generates radiation during operation, and therefore, when it is disposed of, it is necessary to dispose of activated parts of the equipment and surrounding materials as radioactive contaminants. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-160462 A Summary of the Invention [Problem to be solved by the invention]

[0004] Here, the above-mentioned equipment was dismantled in the cyclotron room of the installation facility. However, because the cyclotron room is small, it was difficult to dismantle the activated parts. In addition, because the dismantling work was loud, it was difficult to dismantle the radioactive pharmaceutical manufacturing equipment during daytime diagnosis, for example, when the equipment was installed in a facility such as a hospital where a quiet environment was required. This caused a problem of a large burden on the installation facility associated with the disposal process.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an equipment disposal method and an equipment manufacturing method that can reduce the burden associated with disposal on the installation facility. [Means for solving the problem]

[0006] In one embodiment, the equipment disposal method of the present invention is an equipment disposal method for disposing of equipment to be disposed of that is located at an installation facility, and includes a removal process for removing the equipment that is located in a radiation environment where radiation is present from the installation facility, and a dismantling process for dismantling the equipment at a location other than the installation facility.

[0007] In this equipment disposal method, in the removal process, the equipment placed in a radiation environment where radiation has acted is removed from the installation facility. In the dismantling process, the equipment is dismantled at a location other than the installation facility. In this way, after the removal process is performed, it is no longer necessary to dismantle the equipment at the installation facility where the equipment was installed. At the other location, there is no restriction on the size of the equipment during operation, as there is at the installation facility, and the equipment can be dismantled in an environment suitable for dismantling work. As a result, the burden on the installation facility associated with disposal processing can be reduced.

[0008] The device may be placed in a closed space having a radiation shielding function in the installation facility. In the closed space, the amount of radiation shielding materials is minimized, making the space narrow. Therefore, it is difficult to dismantle the device in the closed space. Therefore, the effect of dismantling the device in another place is significant.

[0009] In the closed space, a first member installed on the floor and a second member as a device installed on the first member are placed, and the second member may be at least partially radioactive and attached to the first member by a mounting means that allows the second member to be disassembled. Therefore, the second member to be removed can be easily disassembled from the first member installed on the floor and removed from the closed space.

[0010] The second member may include a yoke, a magnetic pole, and a vacuum box that are connected to each other by a connecting member in a disassembling manner. The yoke, the magnetic pole, and the vacuum box can be easily disassembled by removing the connecting member. This makes it easier to carry out the components out of the closed space by disassembling them into each component in a short time without generating dust.

[0011] The second member includes a self-shield that covers the yoke, the magnetic pole, and the vacuum box and has a radiation shielding ability, and the self-shield may be configured by combining a plurality of disassembled parts. In this case, the self-shield can also be easily disassembled into parts, so that it can be easily carried out from the closed space.

[0012] The closed space may have an outlet large enough to carry out the largest component among the disassembled components of the second member, or the closed space may be provided with an outlet large enough to carry out the largest component, and the component may be carried out from the outlet. In this way, if the second member is disassembled into each component, each component can be easily carried out from the outlet without generating dust due to collision with the wall of the closed space, etc.

[0013] The disassembled components of the second member may be carried out in the order of those arranged closest to the carrying-out port. In this case, it is possible to prevent the generation of dust or the like caused by the components being carried out colliding with other components and being crushed.

[0014] In other locations, the equipment may be dismantled and the parts separated for disposal based on their degree of activation, reducing the amount of waste because the more activated parts can be selectively discarded.

[0015] In other locations, radioactive parts of the device that generate a radiation dose above a certain level can be identified, cut out, and discarded. In the closed space of the installation facility, the space itself is radioactive, making it difficult to identify, but in other locations, accurate identification can be made.

[0016] The activated parts may be identified by core boring, in which case it will be possible to identify the activated parts within the device and then separate them.

[0017] The equipment disposal method may include a transport step of transporting the equipment from the installation facility to another location while shielding the equipment from radiation generated from the equipment. In this case, leakage of radiation from the equipment can be suppressed when the equipment is transported from the installation facility to the other location.

[0018] The other location may have a dismantling area for dismantling the device, which is covered with a scattering suppression member to suppress scattering of dust. In this case, in the dismantling area, work can be performed while suppressing scattering of dust when dismantling the device.

[0019] The activated portion determined elsewhere may be transported to a disposal area, and the rest of the device may be transported to a recycling area, in which case the activated portion is disposed of and the rest of the device may be recycled without disposal in the recycling area.

[0020] The equipment manufacturing method of the present invention is an equipment manufacturing method for manufacturing new equipment at an installation facility after disposing of equipment that has been placed at the installation facility and is to be disposed of, in which after the equipment that has been placed in a radiation environment where radiation is present is removed from the installation facility, the new equipment is manufactured in the radiation environment of the installation facility while the equipment is being dismantled at a location different from the installation facility.

[0021] In this device manufacturing method, the device that is placed in a radiation environment where radiation acts is carried out from the installation facility. Also, the dismantling work of the device is carried out at a location other than the installation facility. In this way, after the device is carried out, it is no longer necessary to carry out the dismantling work of the device at the installation facility where the device was installed. At the other location, unlike the installation facility, there is no restriction on the size of the device during operation, and the device can be dismantled in an environment suitable for the dismantling work. Here, at the installation facility after the device to be disposed of is carried out, the next work can be carried out. Therefore, while the device is being dismantled at a location other than the installation facility, a new device is manufactured in the radiation environment of the installation facility. As a result, it is possible to manufacture the next new device in the radiation environment without having to wait for the device to be dismantled. As a result, the burden on the installation facility associated with the disposal process can be suppressed. Effect of the Invention

[0022] According to the present invention, it is possible to provide an equipment disposal method and an equipment manufacturing method that can reduce the burden associated with disposal on the installation facility. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram showing a facility for carrying out an equipment waste treatment method according to an embodiment of the present invention. [Diagram 2] 1 is a cross-sectional view of the RI production apparatus 1 in a plan view. [Diagram 3] 1 is a cross-sectional view of the RI production apparatus 1 as seen from the front. [Figure 4] FIG. 2 is an exploded perspective view of the accelerator showing the vacuum box disassembled so that the inside can be seen. [Diagram 5] FIG. 1 is a diagram showing an example of a layout in which a RI production device equipped with a self-shielding is arranged in a building of a PET facility. [Figure 6] FIG. 1 is a diagram showing an example of a layout in which a RI production device without self-shielding is arranged in a building of a PET facility. [Figure 7] FIG. 2 is a process diagram showing the procedure of an apparatus disposal method. [Figure 8] FIG. 1A is a process diagram showing the process for transporting components of the device from an installation facility to another location, and FIG. 1B is a process diagram showing the work content at the other location and the installation facility. [Figure 9] FIG. [Figure 10] FIG. 2 is an enlarged schematic view showing a portion of the factory site. [Figure 11] FIG. 2 is an enlarged schematic diagram of the reuse plant area and waste storage facility. [Figure 12] FIG. 1 is an enlarged schematic diagram of the disassembly area. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, a detailed description will be given of an apparatus waste treatment method according to an embodiment of the present invention with reference to the drawings. In the description, the terms "upper" and "lower" may be used, which correspond to the upper and lower directions in the drawings.

[0025] The equipment disposal method according to this embodiment is a method for disposing of equipment 50 to be disposed and placed in an installation facility 100. Fig. 1 is a schematic diagram showing a facility for carrying out the equipment disposal method according to this embodiment. As shown in Fig. 1, in the equipment disposal method, the equipment 50 to be disposed is carried out from within the radiation environment of the installation facility 100, and dismantling work of the equipment 50 is carried out at another location 110 different from the installation facility 100. The radiation environment is an environment where radiation acts, and refers to the range of radiation generated during the operation of the equipment 50.

[0026] In this embodiment, an RI manufacturing device 1 is adopted as the device 50 to be disposed of. A PET facility 101 is adopted as the installation facility 100. The PET facility 101 is a facility where medical procedures are performed using radioisotope (RI) testing agents used in PET (Positron Emission Tomography). The PET facility 101 has a building 102 in which the RI manufacturing device 1 is installed. Of the PET facility 101, the RI manufacturing device 1 to be disposed of is carried out of the building 102. Of the building 102, the portion that has become radioactive due to the use of the RI manufacturing device 1 is dismantled and handed over to an RI association or the like.

[0027] The removed RI manufacturing equipment 1 is transported to a factory 111, which is another location 110 different from the PET facility 101. The factory 111 includes a reuse factory 112 and a waste storage facility 113. The reuse factory 112 is a factory that removes reusable parts from the RI manufacturing equipment 1. The reuse factory 112 includes a take-back point 114 and a sorting point 116. The take-back point 114 is a place that takes back the transported RI manufacturing equipment 1. The sorting point 116 is a place that disassembles the RI manufacturing equipment 1 and separates the disassembled components based on the degree of activation. At the sorting point 116, the components of the RI manufacturing equipment 1 are separated into those to be reused and radioactively contaminated materials. The waste storage facility 113 is a facility that stores activated waste. The waste storage facility 113 includes a radioactively contaminated material storage facility 117. The radioactive contaminated material storage 117 is a place for storing radioactive contaminated material separated from the RI production device 1. The radioactive contaminated material stored in the radioactive contaminated material storage 117 for a predetermined period of time is handed over to the RI Association.

[0028] Next, the configuration of the RI manufacturing apparatus 1, which is the device 50 to be disposed of, will be described with reference to Figs. 2 to 4. Fig. 2 is a cross-sectional view in plan view of the RI manufacturing apparatus 1. Fig. 3 is a cross-sectional view in front view of the RI manufacturing apparatus 1. Fig. 4 is an exploded perspective view of the accelerator 2, in which the vacuum box 44 is disassembled so that the inside can be seen.

[0029] As shown in Fig. 2 and Fig. 3, the RI manufacturing apparatus 1 includes a target device 10. The RI manufacturing apparatus 1 manufactures radioisotopes (RI). The RI manufacturing apparatus 1 can be used, for example, as a cyclotron for PET, and the RI manufactured by the RI manufacturing apparatus 1 is used, for example, to manufacture radiopharmaceuticals (including radiopharmaceuticals) that are radioisotope-labeled compounds (RI compounds). Examples of radioisotope-labeled compounds used in PET examinations (positron emission tomography examinations) in hospitals and the like include: 18 F-FDG (fludeoxyglucose), 18 F-FLT (fluorothymidine), 18 F-FMISO (fluorosonidazole), 11 C-raclopride, etc.

[0030] The RI production apparatus 1 illustrated in Fig. 2 to Fig. 4 is a so-called self-shielded particle accelerator system, and includes an accelerator 2 that accelerates charged particles, and a self-shield 6 that is a radiation shield (wall) that surrounds the accelerator 2 to shield it from radiation. In an internal space S formed so as to be surrounded by the self-shield 6, in addition to the accelerator 2, a target device 10 used to produce RI, a vacuum pump 4 for creating a vacuum inside the accelerator 2, and the like are disposed. Furthermore, in the internal space S, accessories necessary for the operation of the accelerator 2, auxiliary equipment used to cool the target device 10, and the like are disposed.

[0031] The accelerator 2 is a so-called vertical cyclotron. As shown in Fig. 4, the accelerator 2 has a pair of magnetic poles 42, a vacuum box 44, and an annular yoke 46 surrounding the pair of magnetic poles 42 and the vacuum box 44. A portion of the pair of magnetic poles 42 is inserted into the vacuum box 44, and the upper surfaces of the pair of magnetic poles 42 face each other with a predetermined gap therebetween within the vacuum box 44. Particles such as protons and deuterons are accelerated in the gap between the pair of magnetic poles 42. The accelerated particles are emitted from a side surface 45 of the vacuum box 44 as a charged particle beam B (see Figs. 2 and 3).

[0032] As shown in FIGS. 2 and 3, the target device 10 receives a charged particle beam B irradiated from an accelerator 2 to produce RI, and contains a raw material (e.g., target water; 18 The accelerator 2 is provided with a target shield 7. The target device 10 is covered with a target shield 7 provided in the accelerator 2.

[0033] The self-shield 6 is composed of a plurality of parts, and is formed so as to cover the accelerator 2 and the target device 10. The self-shield 6 is a structure in which the accelerator 2 and the target device 10 are arranged, and in which RI is produced by irradiating the target with a charged particle beam B from the accelerator 2. The self-shield 6 is a structure for blocking radiation generated during the RI production and preventing it from leaking outside the self-shield 6.

[0034] 2, the self-shield 6 includes sidewalls 11 and 12 opposed to each other in the irradiation direction of the charged particle beam B, and sidewalls 13 and 14 opposed to each other in the horizontal direction perpendicular to the irradiation direction of the charged particle beam B. The sidewalls 11 and 12 are disposed so as to be spaced apart from each other, and the sidewalls 13 and 14 are disposed so as to be spaced apart from each other. One end of each of the sidewalls 13 and 14 is connected to both ends of the sidewall 11, and the other end of each of the sidewalls 13 and 14 is connected to both ends of the sidewall 12. As a result, the internal space S of the self-shield 6 is surrounded on all four sides by the sidewalls 11, 12, 13, and 14 without any gaps.

[0035] 3, the upper end of the hand-held shield 6 is closed by an upper wall portion 15. That is, the upper end of the side wall portions 11, 12, 13, and 14 is connected to the upper wall portion 15. The lower end of the side wall portions 11, 12, 13, and 14 is placed on a floor 16. As a result, the internal space S surrounded by the side wall portions 11, 12, 13, and 14 is sealed by the upper wall portion 15 and the floor 16 without any gaps in the vertical direction.

[0036] Next, referring to FIG. 5, an example of a layout in which the RI manufacturing device 1 equipped with the self-shielding 6 is arranged in a building 102 of a PET facility 101 will be described. FIG. 5(a) shows a side view of the layout. FIG. 5(b) shows a plan view of the layout. The building 102 has a cyclotron room 70. Inside a wall 71 that separates the cyclotron room 70, a closed space 75 is further formed, which is surrounded by a wall 76 and a ceiling 77 that shield radiation. The wall 76 is made of a material that has a function of shielding radiation, such as concrete. Thus, the RI manufacturing device 1 is arranged in the closed space 75 that has a function of shielding radiation in the PET facility 101. The thickness of the wall 76 and the ceiling 77 is set to, for example, about 0.6 to 0.8 m.

[0037] In the closed space 75, a first member 51 installed on the floor and a second member 52 as the device 50 installed on the first member 51 are arranged. The second member 52 is a member in which at least a part is activated. The activation degree of the second member 52 may be higher than that of the first member 51. In this embodiment, the second member 52 is higher in activation degree than the first member 51, but the relationship of the activation degree of the second member 52 with respect to the first member 51 is not limited to this. It is sufficient that at least a part of the second member 52 is activated. In the example shown in FIG. 5, a stand 53 installed on the floor of the closed space 75 is adopted as the first member 51. The RI production device 1 having a self-shield 6 is adopted as the second member 52. The second member 52 is attached to the first member 51 by a disassembling attachment means. The disassembly-possible mounting means is a means that can release the fixation between the second member 52 and the first member 51 without destruction (cutting, crushing, chipping, etc.), and various fasteners such as bolts are used. The base 53 is formed with a guide portion 55 (see also FIG. 5(b)) for opening and closing a part of the self-shield 6. The guide portion 55 is formed by forming a groove on the upper surface of the base 53 and attaching a member for sliding the self-shield 6. As shown in FIG. 6, a means for stably disposing the second member 52 on the rail 54 is also a disassembly-possible mounting means. At least a part of the second member 52 is radioactive. For the RI production device 1 equipped with the self-shield 6, as shown in FIG. 6, the rail 54 protruding from the floor may be used as the first member 51. For the RI production device 1 not equipped with the self-shield 6, the base 53 on which the guide portion 55 is formed as shown in FIG. 5 may be used as the first member 51.

[0038] The second member 52 includes a yoke 46, a magnetic pole 42, and a vacuum box 44 that are removably connected to each other by a connecting member (see FIG. 4). The connecting member is a mechanical connecting means such as a bolt, and is a member that can be released without being destroyed. As described above, the self-shield 6 is constructed by combining a plurality of disassembled parts.

[0039] The closed space 75 is provided with an exit 78 of a size that allows the largest component of the disassembled components in the second member 52 to be carried out. In the example shown in FIG. 5(b), the exit 78 is provided in one of the four wall portions 76. In addition, when the self-shield 6 is provided, the wall portion 76 is not radioactive, so the exit 78 may be formed by simply destroying the wall portion 76. In addition, the closed space 75 may be provided with the exit 78. In this case, the exit 78 may be an existing door of the closed space 75. The disassembled components in the second member 52 are the yoke 46, the magnetic pole 42, the vacuum box 44, and each part of the self-shield 6. Among these, the one with the largest external dimensions is the largest component. The part of the self-shield 6 is an example of the largest component. The size of the exit 78 is set to a size that the largest component does not collide with the edge of the exit 78.

[0040] Here, the closed space 75 is formed according to the size of the RI production equipment 1, and in addition to the size of the RI production equipment 1 itself, a space is secured for an aisle for workers to pass through (to access the accelerator 2). However, the closed space 75 is so large that it is not possible to fully operate the equipment used for chipping. Note that chipping refers to breaking down structures such as concrete walls and dirt floors, or scraping the surface to arrange the shape.

[0041] Next, referring to FIG. 6, an example of a layout in which the RI producing device 1 without the self-shield 6 is arranged in a building 102 of a PET facility 101 will be described. FIG. 6(a) shows a side view of the layout. FIG. 6(b) shows a plan view of the layout. When the RI producing device 1 does not have the self-shield 6, the accelerator 2 is arranged in an exposed state in the closed space 75. Therefore, the thicknesses of the walls 76, ceiling 77, and floor 79 that surround the closed space 75 and shield against radiation are thicker than those shown in FIG. 5. For example, the thicknesses of the walls 76, ceiling 77, and floor 79 are set to about 1.3 to 2.2 m.

[0042] 6, a rail 54 installed on the floor of the closed space 75 is used as the first member 51. The RI production device 1 without the self-shield 6 is used as the second member 52. The second member 52 is attached to the first member 51 by a disassembling attachment means. The second member 52 is stably disposed on the rail 54, so that the first member 51 and the second member 52 are attached in a disassembling manner.

[0043] In the example shown in Fig. 6, an exit port 78 large enough to carry out the largest component is provided in the closed space 75. The exit port 78 is provided by destroying one of the four walls 76. In this case, the inside of the wall 76 is chipped to pulverize the activated portion and collect the dust. After that, the wall 76 is destroyed from the outside to provide the exit port 78.

[0044] Next, the procedure of the device disposal method will be described with reference to Fig. 7. Fig. 7(a) is a process flow diagram showing the processing content in the PET facility 101, and Fig. 7(b) is a process flow diagram showing the processing content in the factory 111.

[0045] As shown in Fig. 7(a), in the PET facility 101, an exit port 78 is formed in the closed space 75 (step S10). If the closed space 75 does not have an exit port 78, the exit port 78 is formed by destroying the wall 76. If the closed space 75 has an exit port 78, the exit port 78 is formed by opening the door. When the activated portion is pulverized by chipping the inside of the wall 76, the dust is collected and disposed of.

[0046] Next, the RI manufacturing apparatus 1, which is the apparatus 50, is carried out from the carry-out port 78 of the closed space 75 and transported to the factory 111 (step S20: carrying-out process). When carrying out, the apparatus 50 may be jacked up from below and moved by sliding it on rollers. Alternatively, it may be moved by a hand-pushed cart. Once the apparatus 50 is outside the closed space 75, it may be hoisted by a crane.

[0047] At this time, the yoke, the magnetic poles, and the vacuum box are disassembled by removing the connecting members between them. If the device has a self-shield 6, the self-shield 6 is disassembled into each part. Each of the disassembled components of the device 50 is carried out in order starting from the one located closest to the carrying-out port 78.

[0048] Once all the components of the device 50 have been removed from the closed space 75, they are transported from the PET facility 101 to the factory 111 by vehicle or the like.

[0049] Next, processing for disposal of the building 102 is carried out (step S30). At this time, the walls 76, ceiling 77, and floor 79 of the closed space 75 after the device 50 is carried out are destroyed by chipping or the like. The radioactive material is collected, packed into drums, and handed over to the RI Association.

[0050] As shown in Fig. 7(b), the factory 111 receives the transported device 50 (step S110). In the factory 111, activated parts of the device 50 that generate a radiation dose equal to or greater than a predetermined value are identified (step S120). Based on the identification results, the device 50 is dismantled (step S130: dismantling process). Each dismantled part is separated based on the degree of activation and disposed of (step S140).

[0051] In step S130, the activated parts are cut out based on the discrimination result, and in step S140, the cut out parts are disposed of as radioactive contaminated material. Non-activated parts are reused. The yoke, which is a mass of iron material of the device 50, and the self-shielding shield 6, which is a mass of concrete, are dismantled by cutting work using a wire saw or the like and chipping work to scrape off the surface. Of the dismantled parts, those that are activated are stored in a radioactive contaminated material storage facility. In step S120, the activated parts may be identified by, for example, core boring.

[0052] Here, a method of determining the activated parts of the self-shield 6 by core boring will be explained. In order to confirm the state of activation in the depth direction of the self-shield 6, core boring is performed at multiple locations (for example, about 10 locations) from inside the self-shield 6 to obtain concrete samples. These core samples are sliced ​​in the depth direction, and each sample is crushed into granules, and the amount of radioactivity is measured with a radiation detector to identify the radioactive nuclides. Once the distribution of radioactivity in the depth direction is known, it is possible to determine from the radioactivity concentration which parts are radioactive. The parts determined to be radioactive are chipped and separated as radioactive contaminated material.

[0053] Next, referring to FIG. 8(a), a process for transporting components of the device 50 from the installation facility 100 to another location 110 (from the PET facility 101 to the factory 111) will be described. As shown in FIG. 8(a), the transport worker receives the components of the device 50 from the PET facility 101 (step S210). At this time, the transport worker loads the components 59 of the device 50 onto the loading platform 301 of the transport vehicle 300 (see FIG. 9). In the loading platform 301, the components 59 of the device 50 are covered with a shielding member 80 that shields radiation generated from the components 59. The shielding member 80 is not particularly limited as long as it is a member that can shield radiation and can cover the components 59. For example, a sheet having radiation shielding properties may be adopted as the shielding member 80. The sheet is not particularly limited, but for example, a sheet containing lead may be adopted. For example, the components 59 are wrapped in multiple layers of vinyl or the like, and then covered with a lead sheet. The lead sheet may be about 1 to 2 mm thick and may have a size of, for example, about 1 m x 1 m or 0.5 m x 0.5 m. A simple thin plate-like member of lead (without impurities) may be used as the lead sheet. The shielding member 80 is not limited to a sheet-shaped member, and the components 59 may be separated by a partition plate having a shielding function. For example, the components 59 may be separated by a partition plate capable of supporting the lead sheet. In step S210, the amount of radiation leaking from the components 59 is measured, and if the amount meets a predetermined standard, transportation is performed. The method of measuring radiation is not particularly limited, and may be measured at the location of the exit 302 of the loading platform 301, for example.

[0054] Next, the component 59 of the device 50 is transported from the installation facility 100 to the other location 110 while shielding radiation generated from the component 59 of the device 50 (step S220: transport process). The transport vehicle 300 moves from the installation facility 100 to the other location 110 together with the device 50. As described above, during transport, the transport is performed in a state in which leakage of radiation from the loading platform 301 is suppressed. Next, when the transporter arrives at the other location 110, the transporter hands over the component 59 of the device 50 (step S230).

[0055] As a result, component 59 of device 50 can be transported while suppressing leakage of radiation from loading platform 301 to the outside. Conventionally, component 59 was placed in a drum, but if the amount of radiation leaking exceeded a predetermined value, it had to wait in a designated space in the hospital until the radiation level decreased. However, in this embodiment, component 59 of device 50 is covered with shielding member 80, so there is no need to wait in the hospital, and the space in the hospital can be used effectively.

[0056] As shown in FIG. 8(b), after the device 50 arranged in a radiation environment where radiation has acted is carried out from the installation facility 100, a new device 50 may be manufactured in the radiation environment of the installation facility 100 while a processing operation (step S410) of the device 50 is being performed in another location 110 different from the installation facility 100. In the installation facility 100, parts for the new device 50 are carried in the closed space 75 (step S310). Next, in the closed space 75, the new device 50 is assembled. The operations of steps S310 and S320 are performed at the same timing as the processing operation 410 in the other location 110, but it is not necessary for all the operations in both locations to be performed at the same time, and it is sufficient that the timing from the start to the end of the operations overlaps even partially. The processing operation 410 may include the operations of steps S110 to S140 shown in FIG. 7(b).

[0057] Next, a specific example of the configuration and work content of a factory 111, which is another location 110, will be described in detail with reference to Fig. 10 to Fig. 12. Fig. 10 is an enlarged schematic view showing a part of the site of the factory 111. The factory 111 includes an operation test area 210 (reuse area), a building 220, a reuse factory area 200, and a waste storage facility 113 (disposal area).

[0058] The operation test area 210 has an accelerator room and an irradiation room for irradiating particle beams accelerated by an accelerator. In the operation test area 210, the reusable items 140 separated in the reuse factory area 200 can be incorporated into the equipment and an operation test can be performed to investigate the usability. The building 220 includes an accelerator use area 221 (reuse area) and a receiving point 114. The accelerator use area 221 is an area where the accelerator 2 is used. The receiving point 114 is a place for receiving the radioactive material 141 (constituent element 59 of the equipment 50) from the transport vehicle 300 (see FIG. 9). The radioactive material 141 received at the receiving point 114 is carried into the reuse factory area 200. In the reuse factory area 200, the constituent elements 59 of the equipment 50 are separated into reusable items 140 and waste 142 according to the amount of radiation. The reuse factory area 200 has the functions of the collection point 114 and the sorting point 116 in Fig. 1. In the waste storage facility 113, waste 142 is stored.

[0059] A specific example of the reuse factory area 200 will be described in more detail with reference to FIG. 11. FIG. 11 is an enlarged schematic view of the reuse factory area 200 and the waste storage facility 113. As shown in FIG. 11, the reuse factory area 200 includes a reuse processing factory 201, a reuse item storage area 202, and an investigation room 203. The reuse processing factory 201 is a factory that separates the received radioactive material 141 into reuse items 140 and waste 142 by performing reuse processing. The reuse processing factory 201 includes a dismantling area 204. The reuse item storage area 202 is a place for storing the separated reuse items 140. The investigation room 203 includes a contamination inspection room for performing contamination inspection, a measurement room for measuring radiation, and the like.

[0060] A specific example of the dismantling area 204 will be described in more detail with reference to FIG. 12. FIG. 12 is an enlarged schematic diagram of the dismantling area 204. For comparison with the dismantling area 204, FIG. 12 shows the closed space 75 of the PET facility 101. As shown in FIG. 12, the dismantling area 204 is an area for dismantling the device 50, covered with a scattering suppression member 205 to suppress scattering of dust. The scattering suppression member 205 is not particularly limited as long as it can suppress scattering of dust caused by the dismantling work of the device 50, and for example, a vinyl sheet, a partition, or the like may be adopted. A ventilation device 206 is provided in the dismantling area 204 to ventilate the area and collect the scattered dust. Note that the dust is also a radioactive material, and therefore there is a health problem if the worker inhales it. Therefore, the ventilation device 206 can not only simply discharge the dust to the outside, but also collect the dust by providing a filter. In the dismantling area 204, processing equipment 207 for dismantling each component 59 of the device 50 is provided. The processing equipment 207 is equipment for performing cutting work such as a wire saw, equipment for performing chipping work, etc. In the dismantling area 204, a large space SP for performing dismantling work is secured. In the space SP, each component 59 of the dismantled device 50 is placed. The waste 142 (activated parts) identified in the dismantling area 204 is transported to the waste storage facility 113, which is a disposal area, and the reusable items 140 (parts excluding the activated parts) of the device 50 are stored in the reusable items storage area 202 and then transported to the operation test area 210 and the accelerator use area 221, which are reuse areas.

[0061] As shown in FIG. 12, inside the closed space 75 of the PET facility 101, the gap GP1 between the device 50 and the wall is very narrow, making it difficult to secure a working space (about 1 m) for chipping or the like. On the other hand, the dismantling area 204 of the other place 110 has a sufficiently large space secured compared to the closed space 75. Therefore, in the dismantling area 204, work can be performed more efficiently than when dismantling work is performed in the closed space 75. Also, since the closed space 75 is a dedicated space for operating the device 50, there may be cases where the lighting fixtures are insufficient and it is dark for work. On the other hand, the dismantling area 204 is a region whose main purpose is work, so it is bright. Since the closed space 75 is a part of a medical facility, noise cannot be made and the working time is limited, making it difficult to work. On the other hand, since the dismantling area 204 is a region within a large factory, work can be performed without worrying about making noise and with reduced constraints on the working time. The closed space 75 does not have the equipment necessary for dismantling and does not have any dust processing facilities. On the other hand, in the dismantling area 204, necessary equipment can be installed, and dust processing equipment can also be installed.

[0062] Next, the operation and effect of the equipment disposal method according to this embodiment will be described.

[0063] First, as a comparative example, a case where the dismantling work of the device 50 is performed in the closed space 75 of the installation facility 100 will be described. The RI manufacturing device 1 includes a yoke (about 20 tons of iron material), a self-shield (about 100 tons of concrete), and the like, and therefore cutting work using a wire saw or chipping work is required to dismantle these. However, in order to minimize the amount of radiation shielding material, the closed space 75 is usually limited to the minimum space required to install the RI manufacturing device 1. For example, as shown in Figs. 5 and 6, in consideration of the range of movement of the guide part 55 and the rail 54, only the space for installing the RI manufacturing device 1 and the space for the passage through which the worker passes are secured in the closed space 75. Therefore, the closed space 75 is a rather narrow space for performing cutting work or chipping work. In addition, since the dust generated during the work is radioactive material, it is necessary to collect and process it with a dust collector in order to prevent internal exposure of the worker and scattering outside the controlled area. Furthermore, because cutting and chipping operations generate noise, hospitals undergoing diagnosis are forced to limit operations to holidays and nighttime, and if there are hospitalization facilities nearby, measures must be taken to deal with the noise. Also, drums filled with radioactive contaminated material cut up within the facility for shipment to the RI Association must have their surface dose reduced to a certain value or lower before they can be handed over to the RI Association. For this reason, it is necessary to reduce the amount of radiation generated by the RI production device 1 that has been discontinued, and it is necessary to cool it down (wait for a certain period of time). For these reasons, there is a problem in that the burden of waste disposal on the installation facility 100 is large.

[0064] In the apparatus disposal method according to the present embodiment, in the carrying-out step (step S20), the apparatus 50 arranged in a radiation environment where radiation has acted is carried out from the installation facility 100. In addition, in the dismantling step (step S130), the apparatus 50 is dismantled at another location 110 different from the installation facility 100. In this way, after the carrying-out step, it is no longer necessary to dismantle the apparatus 50 at the installation facility 100 where the apparatus 50 was installed. At the other location 110, unlike the installation facility 100, there is no restriction on the size of the area during operation of the apparatus 50, and the apparatus 50 can be dismantled in an environment suitable for dismantling. As described above, the burden on the installation facility 100 associated with disposal processing can be reduced.

[0065] By receiving the RI manufacturing apparatus 1 at the factory 111, dismantling work can be performed using dedicated equipment within the factory. This makes it possible to provide the necessary work space and equipment for workers, improving safety. Also, at the installation facility 100, there is no need to perform work within the facility other than work performed during removal, reducing the impact on the facility. Furthermore, the radiation dose on the surface of the RI manufacturing apparatus 1 to be removed must be reduced in accordance with regulations for transportation, but this is easier than reducing the surface dose of a drum, which is subject to size and weight restrictions for delivery to the RI Association, and the cooling period can be relatively short.

[0066] The device 50 may be placed in a closed space 75 having a radiation shielding function in the installation facility 100. The closed space 75 is a narrow space in order to minimize the amount of radiation shielding materials. Therefore, it is difficult to dismantle the device 50 within the closed space 75. Therefore, the effect of dismantling the device 50 in another location is significant.

[0067] In the closed space 75, a first member 51 placed on the floor and a second member 52 as an apparatus 50 provided on the first member 51 are arranged, and the second member 52 is at least partially radioactive, and may be attached to the first member 51 by a removable attachment means. Therefore, the second member 52 to be removed can be easily removed from the first member 51 placed on the floor and removed from the closed space 75.

[0068] The second member 52 may include a yoke 46, a magnetic pole 42, and a vacuum box 44 that are connected to each other by a connecting member in a disassembling manner. The yoke 46, the magnetic pole 42, and the vacuum box can be easily disassembled by removing the connecting member. This makes it easier to carry out the components out of the closed space 75 by disassembling them into each component in a short time so as not to generate dust.

[0069] The second member 52 includes a self-shielding shield 6 that covers the yoke 46, the magnetic pole 42, and the vacuum box 44 and has a radiation shielding ability, and the self-shielding shield 6 may be configured by combining a plurality of disassembled parts. In this case, the self-shielding shield 6 can also be easily disassembled into parts, so that it can be easily carried out from the closed space 75.

[0070] The closed space 75 may have an exit 78 large enough to carry out the largest component among the disassembled components of the second member 52, or an exit 78 large enough to carry out the largest component may be provided in the closed space 75, and the component may be carried out through the exit 78. In this way, if the second member 52 is disassembled into each component, each component can be easily carried out through the exit 78 without generating dust due to collision with the wall 76 of the closed space 75 or the like.

[0071] The disassembled components of the second member 52 may be carried out in the order of those arranged closest to the carry-out opening 78. In this case, it is possible to prevent the generation of dust and the like caused by the components being carried out colliding with other components and being crushed. In addition, it is easy to secure space during the chipping operation, and the generation of dust and the like can be prevented.

[0072] At another location 110, the device 50 may be disassembled and each of the disassembled parts may be separated and disposed of based on the degree of activation, thereby reducing the amount of waste, since the parts with a high degree of activation may be selectively disposed of.

[0073] In the other location 110, activated parts of the device 50 that generate a radiation dose equal to or greater than a predetermined value can be identified, and the activated parts can be cut out and discarded. In the closed space of the installation facility 100, the space itself is activated, making it difficult to make such identification, but in other locations, accurate identification can be made.

[0074] The activated portion may be identified by core boring. In this case, it is possible to identify the activated portion within the device 50 and then separate it.

[0075] The equipment disposal method may include a transport step of transporting the equipment 50 from the installation facility 100 to another location 110 while shielding radiation generated from the equipment 50. In this case, when the equipment 50 is transported from the installation facility 100 to the other location 110, leakage of radiation from the equipment 50 can be suppressed.

[0076] The other location 110 may have a dismantling area 204 for dismantling the device 50, which is covered with a scattering suppression member 205 to suppress scattering of dust. In this case, in the dismantling area 204, work can be performed in a state in which scattering of dust is suppressed when dismantling the device 50.

[0077] The activated parts determined in the other location 110 may be transported to a disposal area, and the parts of the device 50 other than the activated parts may be transported to a reuse area. In this case, the activated parts are disposed of in the disposal area, and the parts other than the activated parts may be reused without being disposed of in the reuse area. In addition to non-activated parts (parts other than the activated parts), it may be determined that parts that are activated but do not pose a problem in reuse due to the shape of the item, such as a self-shield and a yoke, are to be reused.

[0078] The equipment manufacturing method according to this embodiment is an equipment manufacturing method for manufacturing new equipment 50 at the installation facility 100 after disposing of equipment 50 to be disposed of that has been placed at the installation facility 100, in which after the equipment 50 that has been placed in a radiation environment where radiation is present is removed from the installation facility 100, the new equipment 50 is manufactured within the radiation environment of the installation facility 100 while dismantling work for the equipment 50 is being carried out at another location 110 different from the installation facility 100.

[0079] In this device manufacturing method, the device 50 arranged in a radiation environment where radiation acts is carried out from the installation facility 100. Also, the dismantling work of the device 50 is carried out at another location 110 different from the installation facility 100. In this way, after the device 50 is carried out, it is no longer necessary to carry out the dismantling work of the device 50 at the installation facility 100 where the device 50 was installed. At the other location, unlike the installation facility 100, there is no restriction on the size of the device 50 during operation, and the device 50 can be dismantled in an environment suitable for the dismantling work. Here, the installation facility 100 after the device 50 to be disposed of is carried out can carry out the next work. Therefore, while the dismantling work of the device 50 is being carried out at the other location 110 different from the installation facility 100, a new device 50 is manufactured in the radiation environment of the installation facility 100. As a result, it is possible to manufacture the next new device 50 in the radiation environment without having to wait for the device 50 to be dismantled. As a result, the burden on the installation facility 100 associated with the disposal process can be suppressed.

[0080] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and may be modified within the scope that does not change the gist of the invention described in each claim.

[0081] For example, the second member does not have to be an RI production device. For example, a beamline of a charged particle beam, a BT magnet, a gantry of a device for irradiating a proton beam, a BNCT device, or the like may be adopted as the second member.

[0082] The layouts shown in FIG. 5 and FIG. 6 are merely examples and may be modified as appropriate. [Explanation of symbols]

[0083] 6...self-shielding, 42...magnetic pole, 44...vacuum box, 46...yoke, 50...apparatus, 51...first component, 52...second component, 75...closed space, 78...exit, 100...installation facility, 110...other locations, 113...waste storage facility (disposal area), 204...dismantling area, 210...operational test area (recycling area), 221...accelerator use area (recycling area).

Claims

1. 1. A method for disposing of equipment to be disposed of at an installation facility, comprising the steps of: a carrying out step of carrying out the device disposed in a radiation environment where radiation has acted, from the installation facility; a dismantling step of dismantling the equipment at a location different from the installation facility.

2. The equipment disposal method according to claim 1 , wherein the equipment is placed in a closed space having a radiation shielding function in the installation facility.

3. A first member installed on a floor and a second member serving as the device provided on the first member are disposed in the closed space, At least a portion of the second member is radioactive; 3. The method of claim 2, wherein the second member is attached to the first member by a releasable attachment means.

4. The method for disposing of equipment according to claim 3 , wherein the second member includes a yoke, a magnetic pole, and a vacuum box that are removably connected to each other by a connecting member.

5. the second member includes a self-shield having a radiation shielding ability, the self-shielding covering the yoke, the magnetic pole, and the vacuum box; The method for disposing of a device according to claim 4 , wherein the self-shield is constructed by combining a plurality of disassemblable parts.

6. 5. The equipment disposal method according to claim 4, wherein the closed space has an outlet large enough to transport the largest component among the disassembled components of the second member, or the closed space is provided with an outlet large enough to transport the largest component, and the component is transported from the outlet.

7. The method for dismantling an equipment according to claim 6 , wherein the dismantled components of the second member are discharged in order of proximity to the discharge outlet.

8. 2. The method for disposing of equipment according to claim 1, wherein, at said other site, said equipment is dismantled, and each of the dismantled parts is separated and disposed of based on the level of activation.

9. 2. The method for disposing of equipment according to claim 1, further comprising the steps of: identifying, at said other location, an activated portion of said equipment that generates a radiation dose equal to or greater than a predetermined value; and cutting out and disposing of said activated portion.

10. The method for disposing of equipment according to claim 9, wherein the activated portion is identified by core boring.

11. 2. The equipment disposal method according to claim 1, further comprising a transport step of transporting the equipment from the installation facility to the other location while shielding the equipment from radiation generated by the equipment.

12. 9. The method for disposing of equipment according to claim 8, wherein the other place has a dismantling area for dismantling the equipment, the dismantling area being covered with a scattering suppression member to suppress scattering of dust.

13. 10. The method for disposing of an equipment according to claim 9, further comprising the steps of: transporting the activated portion determined at the other location to a disposal area; and transporting the rest of the equipment excluding the activated portion to a recycling area.

14. 1. An equipment manufacturing method for manufacturing new equipment at an installation facility after disposing of equipment to be disposed of at the installation facility, comprising: An equipment manufacturing method, comprising: after removing the equipment, which has been placed in a radiation environment affected by radiation, from the installation facility, manufacturing the new equipment in the radiation environment of the installation facility while processing work on the equipment is being performed at a location different from the installation facility.

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