Radioactive waste separation method and cutting and separation device

Abstract

To provide a radioactive waste separation method and a cutting / separating device, which allow for efficiently generating non-radioactive waste (NR) from radioactive waste.SOLUTION: A radioactive waste separation method of the present invention comprises subjecting radioactive waste with contaminated portions on surfaces thereof to: a cutting blade inserting step for preventing machined product from touching cutting blades of a milling cutter, end mill and the like contaminated by being in contact with contaminated surfaces of the radioactive waste to prevent contamination of the machined product; and a separation step for preventing the post-cutting machined product from touching scattered shavings to prevent contamination of the machined product.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radioactive waste separation method and cutting and separation device that separates contaminated or previously contaminated areas (hereinafter simply referred to as contaminated areas) from radioactive waste generated from nuclear power plants, etc., to produce non-radioactive waste (hereinafter simply referred to as NR). [Background technology]

[0002] Decommissioning of aging nuclear power plants that have been in operation for many years generates a large amount of radioactive waste. However, radioactive waste requires long-term management, and reducing the amount of radioactive waste is the key to reducing costs and work. Traditionally, the amount of radioactive waste has been reduced by utilizing the clearance system, but since most of the radioactive waste generated at nuclear power plants is metal material that is only contaminated on the surface, it is possible to reduce the amount of radioactive waste by separating the surface contamination and turning it into NR.

[0003] One method for separating metal surfaces is to cut the surface using a cutting blade, which is one of the machining methods. When cutting with cutting blades such as ordinary milling cutters or end mills, cutting chips are generated and accumulate on the workpiece. However, when cutting the surface of contaminated radioactive waste, the resulting cutting chips are radioactive waste, and when they accumulate on the workpiece, they contaminate the uncontaminated internal metal after separation. Conventional methods for removing cutting chips include the technologies disclosed in Patent Documents 1 and 2. The cutting bar disclosed in Patent Document 1 has a blower fan attached to the rotating shaft of the cutting bar, so that the air generated when the cutting bar rotates hits the cutting chips. In addition, the device disclosed in Patent Document 2 has an agitator attached to the rotating part of the milling cutter, which can come into contact with and remove the cutting chips that accumulate on the workpiece during cutting.

[0004] However, the technologies disclosed in Patent Documents 1 and 2 are based on the assumption that the cutting chips generated during cutting will temporarily accumulate on the workpiece, and therefore even if a workpiece from which the contaminated areas have been removed, i.e., an NR, can be produced, the contaminated areas will immediately come into contact with the workpiece, causing the workpiece to become contaminated. Furthermore, when the cutting blades of milling cutters, end mills, etc. come into contact with contamination, they contaminate the workpiece. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-199230 [Patent Document 2] Patent No. 6296006 Summary of the Invention [Problem to be solved by the invention]

[0006] The problem that the present invention aims to solve is, in view of the problems of the above-mentioned conventional technology, to provide a radioactive waste separation method and cutting and separation device that separates contaminated parts from radioactive waste and efficiently produces NR. [Means for solving the problem]

[0007] As a first means for solving the above problems, the present invention provides a method for treating radioactive waste having contaminated areas on its surface, a process of fixing the contaminated part of the radioactive waste in an upright position using a fixing stand equipped with a fixture having a metal claw that is hooked onto the edge of the radioactive waste that is in contact with the mounting surface and a mounting groove that is formed in a grid pattern on the mounting surface and can fix the metal claw at any point on the mounting surface via a fastening means; a cutting step for cutting blades of milling cutters, end mills, etc. that have been contaminated by coming into contact with contamination on the surface of radioactive waste, to prevent the cutting blades from coming into contact with the workpiece and contaminating the workpiece; a separation process for preventing the scattered cutting chips from coming into contact with the workpiece after cutting and contaminating the workpiece; The object of the present invention is to provide a method for separating radioactive waste, which comprises the steps of: According to the first means, by cutting off the contaminated areas on the surface of the radioactive waste, NR can be efficiently produced from the radioactive waste, thereby realizing a reduction in the volume of the radioactive waste. Furthermore, even if the steel plate of the radioactive waste is flat or curved, it can be fixed to the mounting surface of the fixed frame.

[0008] As a second means for solving the above problem, the present invention provides the separation method according to the first means, The radioactive waste having a contaminated area on its surface Follow a step of inserting the cutting blade into the surface adjacent to the contaminated surface; a step of blowing off the cutting chips with air to separate them so that they do not come into contact with the workpiece; The object of the present invention is to provide a method for separating radioactive waste, which comprises the steps of: According to the second means, NR can be produced efficiently and reliably from radioactive waste, and the volume of radioactive waste can be reduced.

[0009] As a third means for solving the above problems, the present invention provides the separation method according to the second means, a separating step of moving the cutting blade from above to below so that the scattering and falling cutting chips do not come into contact with the workpiece after cutting; The object of the present invention is to provide a radioactive waste separation method characterized by including a cover to prevent the cutting chips from coming into contact with the workpiece after cutting due to unexpected scattering. According to the third means, contact due to unexpected random scattering of cutting chips can also be prevented, improving the reliability of generating NR from radioactive waste.

[0010] As a fourth means for solving the above problems, the present invention provides a method for separating radioactive waste, characterized in that, prior to the separation method in the second or third means, it includes a step of decontaminating the contamination on the surface of the radioactive waste in cases where it is expected that the contamination on the surface of the radioactive waste will scatter in particulate form. According to the fourth means mentioned above, it is possible to prevent particulate contamination on the surface from scattering due to vibration during separation, etc., and NR can be reliably generated even in cases where contamination of the processed product by particulate radioactive material on the surface of the radioactive waste is expected.

[0011] The present invention provides a fifth means for solving the above problems, A fixed stand that fixes the contaminated surface of the radioactive waste in an upright position, A cutting machine that moves back and forth and up and down relative to the fixed stand and cuts the workpiece so that the cutting chips generated during the separation processing of the radioactive waste do not come into contact with the workpiece; Equipped with , The fixed stand is provided with a claw metal fitting that is hooked onto the edge of the radioactive waste that is in contact with the mounting surface, and a fixing jig having a mounting groove that is formed in a grid pattern on the mounting surface and can fix the claw metal fitting at any point on the mounting surface via a fastening means. The object of the present invention is to provide a cutting and separating device for radioactive waste, characterized in that According to the fifth means, cutting chips generated during separation do not accumulate on the workpiece or come into contact with the workpiece, and NR can be efficiently produced from radioactive waste. Furthermore, even if the steel plate of the radioactive waste is flat or curved, it can be fixed to the mounting surface of the fixed frame.

[0012] As a sixth means for solving the above problems, the present invention provides the fifth means, The scattered cutting chips Machining surface The present invention provides a cutting and separating device for radioactive waste, which is characterized by having an air blowing section that blows air from behind the cutting blade of the cutting machine to blow away the cutting chips generated during the cutting process so that they do not come into contact with the radioactive waste. According to the sixth means, NR can be produced efficiently and reliably from radioactive waste, and the volume of radioactive waste can be reduced.

[0013] As a seventh means for solving the above problems, the present invention provides the fifth or sixth means, a mechanism for processing the cutting blade downward from the upper end so that the cutting chips generated during the separation process do not come into contact with the workpiece; The object of the present invention is to provide a radioactive waste cutting and separation device characterized in that cutting chip covers are provided above, on both sides of the cutting blade of the cutting machine so that the cutting chips generated do not come into contact with the processing surface. According to the seventh means, contact due to unexpected scattering of cutting chips can also be prevented, improving the reliability of generating NR from radioactive waste.

[0015] The present invention is a first method for solving the above problems. 8 As a means of Seventh In the means of The fixed stand is rotatably mounted on a movable table, The object of the present invention is to provide a radioactive waste cutting and separation device characterized in that the movable table is mounted on a table base so as to be slidable in a direction perpendicular to a vertical plane passing through the rotation axis of the cutting machine. The above item 8 According to this method, the curved steel plate of radioactive waste can be efficiently cut along the curved surface by rotating the fixed stand relative to the cutting machine. Also, the radioactive waste can be moved in a direction perpendicular to the vertical plane passing through the rotation axis of the cutting machine, i.e., in a horizontal direction, and the cutting work can be performed in one fixing operation without having to be re-fixed. [Effects of the Invention]

[0016] According to the present invention, by cutting off the contaminated areas on the surface of radioactive waste, NR can be efficiently produced from the radioactive waste, thereby realizing a reduction in the volume of the radioactive waste. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a plan view of a cutting and separating device for radioactive waste according to the present invention; [Figure 2] 1 is a front view of a cutting and separating device for radioactive waste according to the present invention. [Figure 3] 1 is a side view of a cutting and separating device for radioactive waste according to the present invention. [Figure 4] 1 is a perspective view of a cutting and separating device for radioactive waste according to the present invention; [Figure 5] FIG. [Figure 6] FIG. [Figure 7]This is an explanatory diagram of the exhaust stack being lowered in the exhaust stack dismantling area. [Figure 8] This is an explanatory diagram of the cutting and transportation of exhaust stacks in the exhaust stack dismantling area. [Figure 9] FIG. 10 is an explanatory diagram of receiving and cutting in the separation area. [Figure 10] FIG. 10 is an explanatory diagram of a separation process for a separation area. DETAILED DESCRIPTION OF THE INVENTION

[0018] Embodiments of the radioactive waste separation method and cutting and separation device of the present invention will be described in detail below with reference to the drawings. The radioactive waste of the present invention is steel plates cut from exhaust stacks, piping equipment, etc. of nuclear power plants. The steel plates have contaminated areas on their surfaces where radioactive contaminants adhere, and come in flat or curved shapes with a curvature (R) (hereinafter sometimes referred to as curved steel plates). In this embodiment, the radioactive waste that has been cut and separated from the contaminated areas is called NR (sometimes referred to as processed product).

[0019] [Radioactive waste cutting and separation device 10] Fig. 1 is a plan view of the radioactive waste cutting and separation device of the present invention (fixed stand omitted). Fig. 2 is a front view of the radioactive waste cutting and separation device of the present invention (fixed stand omitted). Fig. 3 is a side view of the radioactive waste cutting and separation device of the present invention. Fig. 4 is a perspective view of the radioactive waste cutting and separation device of the present invention. As shown in the figure, the radioactive waste cutting and separation device 10 of the present invention is equipped with a fixed stand 20 that fixes the radioactive waste steel plate 12 in an upright position, and a cutting machine 50 that moves back and forth and up and down relative to the fixed stand 20 to cut the steel plate 12 so as not to come into contact with the contaminated parts separated during the separation process.

[0020] (Fixed stand 20 side) The fixed stand 20 is a stand that can fix the steel plate 12 or curved steel plate 13 of radioactive waste in an upright position so that the surface (the main surface on which the contaminated area is attached) is perpendicular to the cutting blade. The fixed frame 20 has the steel plate 12 or the curved steel plate 13 fixed to the mounting surface of the frame body using a fixing jig 22 and a pressing jig 29 . 5 is an explanatory diagram of the fixing jig. The fixing jig 22 has an attachment groove 24, a metal claw 26, and a fastening means 28. The mounting grooves 24 are attached to both ends of the fixed base 20 and are provided in a grid pattern in the vertical and horizontal directions on the mounting surface of the fixed base 20. The cross-sectional shape of the mounting grooves 24 is formed in a T-shape so that the bolt heads of the fastening means 26 described below can fit and slide.

[0021] Claw metal fitting 26 is a commercially available clamp, and consists of a right-angled triangular body, swivel pads on both ends of the body, bolt holes on the right-angled parts of the body, and semi-cylindrical washers. One end of the body is placed on the mounting surface, and the other end is placed so as to hook onto the edge of steel plate 12, and a T-slot nut of fastening means 28 (described later) is inserted into the bolt hole to secure it in place. The fastening means 28 consists of a stud bolt, a flange nut, and a T-slot nut, and the T-slot nut can be fitted into the mounting groove 24 and slid within the groove to any position. The stud bolt can be inserted into the bolt hole of the claw metal fitting 26 and screwed onto the flange nut, allowing one end of the claw metal fitting 26 to be hooked onto the edge of the steel plate 12 and fixed in place. The clamp jig 29 is provided near the center of the mounting surface and consists of an H-shaped steel 29a and a channel steel 29b that are aligned along the height direction of the steel plate 12, and is attached so as to clamp the steel plate 12 and the curved steel plate 13 near their centers to suppress vibrations that occur during cutting. Note that when cutting the area clamped by the clamp metal fittings 29, the clamp metal fittings are removed.

[0022] By combining a plurality of such fixing jigs 22 and holding jigs 29, the steel plate 12 or curved steel plate 13 can be fixed to the mounting surface of the fixed frame 20. The fixed base 20 is provided on a movable table 30. The movable table 30 is a rectangular frame in plan view, and has an advancing / retreating moving section 32 and a rotating section 36 for the fixed base 20 provided on the upper surface. The forward / backward moving section 32 has a slider 33 provided with a swivel section 36 (described later), a slide rail 34 that moves the slider 33 forward / backward, and a drive motor 35 . The swivel unit 36 ​​has a fan-shaped swivel base 37 to which the fixed base 20 is attached, and a swivel shaft (rotation shaft) 38 provided at the main part of the fan shape. The swivel base 37 can be swiveled within a predetermined angle range by a drive motor or manually. The moving table 30 is mounted on a table stand 40. The table stand 40 is made up of a slide rail 42 that extends in a direction perpendicular to the rotation axis of the cutting machine, and a drive motor 44. The moving table 30 is attached to the slide rail 42 and can move back and forth along the rail.

[0023] (Cutting machine 50 side) FIG. 6 is an explanatory diagram of the cutting machine. The cutting machine 50 is a cutting machine equipped with a drive motor 52 and a cutting blade (milling cutter or end mill) 53 on a rotary shaft. The cutting machine 50 is attached to a frame body 60. The cutting machine 50 has a cutting chip cover 51 attached to both side surfaces and the top surface along the outer periphery of the cutting blade. The cutting chip cover 51 is formed in a fan shape when viewed from the front, and can prevent cutting chips generated during cutting from scattering onto both side surfaces and the top surface. An air blowing section 54 that blows air is provided above the cutting blade of the cutting machine 50. The air blowing section 54 is equipped with a blower and a blowing nozzle, and blows air from behind the cutting blade during cutting, blowing away the resulting cutting chips so that they do not adhere to the workpiece.

[0024] The frame body 60 is a box-shaped frame provided at a position opposite the mounting surface of the fixed base 20. The frame body is equipped with an elevator section 62 that can move the cutting machine 50 in the vertical direction, and an advancing / retreating section 64 that can move the cutting machine 50 forward and backward in a direction to approach or move away from the fixed base 20. The elevator section 62 and the advancing / retreating section 64 can be, for example, a drive motor and a slide rail. The radioactive waste cutting and separation device 10 configured as described above fixes the cut radioactive waste steel plate 12 or curved steel plate 13 to the fixed frame 20 using the fixing jig 22 and the holding jig 29. Specifically, after the steel plate 12 or curved steel plate 13 is leaned against the mounting surface of the fixed frame 20, the swivel pads of the claw fittings 26 are hooked onto the left, right, top and bottom edges of the steel plate 12, and the T-slot nut of the fastening means 28 fitted into the mounting groove 24 is moved to an arbitrary position and fixed using a flange nut.

[0025] In the case of a curved steel plate 13, large gaps occur between both ends and the mounting surface, so it is recommended to temporarily fasten the plate with a clamping jig 29 starting from the center of the steel plate where the gap is small. The fixed base 20 is moved to the cutting start position (origin), which is the center position between the fixed base 20 and the frame body 60. The cutting machine 50 is moved to the upper end of the steel plate 12, approached the steel plate 12, and cutting is performed from above to below. As shown in Figure 6, the cutting blade contacts the steel plate 12 or curved steel plate 13 with the side of the cutting blade contacting the contaminated area, and the tip of the cutting blade contacts the end face of the steel plate or curved steel plate 13, cutting from an uncontaminated area deeper than the contaminated area (this is called the cutting blade setting process in this embodiment). This prevents contamination of the NR generated by the cutting blade during cutting, maintaining a contamination-free state. The cutting chips generated during cutting are prevented from scattering above and on both sides of the cutting chip by the cutting chip cover 51, and basically fall by gravity without adhering to the workpiece. There is a risk that the generated cutting chips will fly toward the workpiece, but the air blower 54 provided behind the cutting blade can blow them away to prevent them from adhering to the workpiece. After the cutting blade reaches the bottom end of the steel plate 12, the cutting machine 50 is moved away from the steel plate 12 and upward. During this time, the moving table is moved laterally across the steel plate according to the cutting length of the cutting blade. The above operations are repeated until the contaminated portion of the steel plate 12 can be removed. Furthermore, in the case of a curved steel plate 13, after the cutting blade reaches the bottom end of the curved steel plate 13, the cutting machine 50 is moved away from the curved steel plate 13 and upward. During this time, the steel plate is rotated by a predetermined angle using the swivel unit 36 ​​of the fixed frame 20 according to the cutting length of the cutting blade. The above operations are repeated until the contaminated portion of the curved steel plate 13 can be removed.

[0026] [Radioactive waste separation method] A separation method using the radioactive waste cutting and separation device of the present invention having the above-described configuration will be described below. The separation method of this embodiment will be described as an example of its application to a site where metallic radioactive waste (exhaust stacks) generated by a nuclear power plant, only the surface of which is contaminated, is being dismantled. The work areas are a dismantling area and a separation area, which is a space slightly away from the dismantling area. Figure 7 is an explanatory diagram of the lifting and lowering of the exhaust stack in the dismantling area. Figure 8 is an explanatory diagram of the large cutting and transportation of the exhaust stack in the exhaust stack dismantling area. Figure 9 is an explanatory diagram of the receiving and cutting of the load in the separation area. Figure 10 is an explanatory diagram of the separation process in the separation area.

[0027] (Exhaust stack dismantling area) The exhaust stack 1 is decontaminated. In the decontamination process of this embodiment, various methods can be used depending on the state of adhesion of radioactive waste. Commonly known decontamination methods include blasting and water jetting. By decontaminating before the separation process, it is possible to prevent contamination of the processed product due to scattering of particulate radioactive material attached to the surface during separation, and NR from which contaminated areas have been removed can be reliably produced in the separation process described below. Decontamination can be carried out either before or after the operation of cutting the exhaust stack into a ring from above and lowering it into the demolition area using crane 2 (see Figure 7). The suspended exhaust stack is cut into multiple large sections along its axis for the primary cut. The primary cut radioactive waste 3 is transported to the separation area by truck 4 (see Figure 8).

[0028] (separated area) The large-scale radioactive waste 3 is received by a crane 2 and cut into pieces (see Figure 9). The cutting process consists of a cutting blade insertion process for radioactive waste with contaminated areas on its surface, which prevents the cutting blades of milling cutters, end mills, etc. that are contaminated by coming into contact with the workpiece and contaminating it, and a separation process, which prevents scattered cutting chips from coming into contact with the workpiece after cutting and contaminating it. Specifically, the process involves fixing radioactive waste with contaminated areas on its surface with the contaminated side upright, and inserting a cutting blade from the side adjacent to the contaminated side, and then separating the cutting chips by blowing them away with air so that they do not come into contact with the workpiece. In addition, a separation process is provided in which the cutting blade moves from top to bottom to prevent the scattering and falling cutting chips from coming into contact with the workpiece after cutting, and a cover is provided to prevent unexpected scattering of cutting chips from coming into contact with the workpiece after cutting.

[0029] The contaminated portion of the steel plate 12 cut by the radioactive waste cutting and separation device 10 is separated (see FIG. 10). After being roughly cut, the cut steel plate 12 or curved steel plate 13 of radioactive waste is fixed to the fixed frame 20 using a fixing jig 22 and a holding jig 29. The fixed frame 20 is moved to the cutting start position (origin), which is the center position between the frame body 60 and the fixed frame 20. The cutting machine 50 is moved to the upper end of the steel plate 12, in other words, the cut end face, and approaches the steel plate 12 to cut from above downward. At this time, the cutting blade comes into contact with the contaminated portion of the steel plate 12 or curved steel plate 13, with the side of the cutting blade coming into contact with the contaminated portion, and the tip of the cutting blade comes into contact with the cut end face of the steel plate or curved steel plate 13, cutting from an uncontaminated area deeper than the contaminated portion. This prevents contamination with NR generated by the cutting blade during cutting, maintaining a contaminated state. The chips generated during cutting are prevented from scattering above and on both sides of the cutting blade by the chip cover 51, and basically fall due to gravity without adhering to the workpiece. Although there is a risk that the chips will fly toward the workpiece, the air blower 54 provided behind the cutting blade can blow them away so that they do not adhere to the workpiece. After the cutting blade reaches the bottom end of the steel plate 12, the cutting machine 50 is moved upward away from the steel plate 12. During this time, the moving table is moved laterally across the steel plate according to the cutting length of the cutting blade. This operation is repeated until the contaminated portion of the steel plate 12 is removed. Furthermore, in the case of a curved steel plate 13, after the cutting blade reaches the bottom end of the curved steel plate 13, the cutting machine 50 is moved upward away from the curved steel plate 13. During this time, the steel plate is rotated by a predetermined angle using the swivel unit 36 ​​of the fixed frame 20 according to the cutting length of the cutting blade. This operation is repeated until the contaminated portion of the curved steel plate 13 is removed.

[0030] After the separation process, the contaminated area and NR are separated and collected. In addition, for radioactive waste with contaminated areas on the surface, if the dose is low in a preliminary dose survey, for example, if the contaminated areas can be sufficiently removed in the separation process to produce NR, the decontamination process can be omitted and only the cutting and separation process can be carried out. This will reduce the cost and shorten the time required for the radioactive waste separation process. According to the present invention, the dose of radioactive waste can be reduced by the decontamination process, thereby reducing exposure in the subsequent cutting and separation processes. In addition, the amount of cutting in the separation process can be reduced, NR can be efficiently produced from radioactive waste, and the volume of radioactive waste can be reduced. The above describes the preferred embodiments of the present invention. However, the present invention is not limited to the above embodiments and various modifications are possible within the scope of the gist of the present invention. Furthermore, the present invention is not limited to the combinations shown in the embodiments, but can be implemented in various combinations. [Explanation of symbols]

[0031] 1 Exhaust stack 2 Crane 3. Radioactive waste 4 Tracks 10 Radioactive waste cutting and separation equipment 12 Steel plate 13 Curved steel plate 20 Fixed stand 22 Fixture 24 Mounting groove 26 Claw metal fittings 28 Fastening means 29 Clamp 29a H-beam 29b Channel steel 30 Mobile Table 32 Advance / retreat moving part 33 Slider 34 Slide rail 35 Drive motor 36 Swivel section 37 Swivel 38 Swivel Axis 40 Table Stand 42 Slide rail 50 cutting machine 51 Cutting chip cover 52 Drive motor 54 Blower 60 Frame body 62 Lifting section 64 Advance / retreat moving part

Claims

1. For radioactive waste with contaminated areas on the surface, a process of fixing the contaminated part of the radioactive waste in an upright position using a fixing stand equipped with a fixture having a metal claw that is hooked onto the edge of the radioactive waste that contacts the mounting surface and a mounting groove that is formed in a grid pattern on the mounting surface and can fix the metal claw at any point on the mounting surface via a fastening means; a cutting step for cutting blades of milling cutters, end mills, etc. that have been contaminated by coming into contact with contamination on the surface of radioactive waste, to prevent the cutting blades from coming into contact with the workpiece and contaminating the workpiece; a separation step for preventing the scattered cutting chips from coming into contact with the workpiece after cutting and contaminating the workpiece; A method for separating radioactive waste, comprising:

2. In the radioactive waste separation method according to claim 1, a step of inserting the cutting blade into the radioactive waste having a contaminated portion on its surface from a surface adjacent to the contaminated surface; a step of blowing off the cutting chips by air so as to prevent the cutting chips from coming into contact with the workpiece; A method for separating radioactive waste, comprising:

3. In the radioactive waste separation method according to claim 2, a separation step of moving the cutting blade from above to below so that the scattering and falling cutting chips do not come into contact with the workpiece after cutting; A radioactive waste separation method characterized by providing a cover to prevent unexpected scattering of the cutting chips from coming into contact with the workpiece after cutting.

4. A method for separating radioactive waste, characterized in that, prior to the method for separating radioactive waste described in claim 2 or claim 3, a process for decontaminating the surface of the radioactive waste is included if it is expected that the contamination on the surface of the radioactive waste will scatter in particulate form.

5. A fixed stand that fixes the contaminated surface of the radioactive waste in an upright position; a cutting machine that moves back and forth and up and down relative to the fixed frame and cuts the workpiece so that cutting chips generated during the separation treatment of the radioactive waste do not come into contact with the workpiece; Equipped with, A radioactive waste cutting and separation device characterized in that the fixed base is equipped with a claw metal fitting that is hooked onto the edge of the radioactive waste that is in contact with the mounting surface, and a fixing jig that has a mounting groove formed in a grid pattern on the mounting surface and that can fix the claw metal fitting at any point on the mounting surface via a fastening means.

6. 6. The radioactive waste cutting and separation device according to claim 5, A radioactive waste cutting and separation device characterized by having an air blower that blows air from behind the cutting blade of the cutting machine to blow away the cutting chips generated during the cutting process so that the scattered cutting chips do not come into contact with the processing surface.

7. The radioactive waste cutting and separation device according to claim 5 or 6, a mechanism for processing the cutting blade downward from the upper end so that the cutting chips generated during the separation process do not come into contact with the workpiece; A radioactive waste cutting and separation device characterized in that cutting chip covers are provided above, on both sides of the cutting blade of the cutting machine to prevent the cutting chips from coming into contact with the processing surface.

8. The radioactive waste cutting and separating device according to claim 5, claim 6 or claim 7, The fixed stand is rotatably mounted on a movable table, A radioactive waste cutting and separation device characterized in that the moving table is mounted on a table stand so as to be slidable in a direction perpendicular to a vertical plane passing through the rotation axis of the cutting machine.

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