High-level liquid waste large tank cutting method and system

Abstract

The invention discloses a high-level liquid waste large tank cutting method and system, a large tank is installed in an equipment room, and the method comprises the steps that S1, a first hole is formed in the top end of the equipment room; s2, forming a first open hole in the top of the large tank according to the first open hole, so that a cutting tool can extend into the large tank; s3, cutting the vertical pipeline in the large tank to release the operation space in the large tank; and S4, the top, the side wall and the bottom of the large tank are cut in sequence, and cut blocks formed after cutting are taken out through a second opening of the equipment chamber. According to the application, the area of the opening in the top end of the equipment chamber can be reduced, so that the risk of diffusion of a radioactive substance from the opening in the top end of the equipment chamber to the external environment is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a method and a system for cutting a large tank of high-level radioactive waste liquid. Background Art

[0002] High-level waste tanks are used to temporarily store high-level waste liquid. Usually, high-level waste tanks are installed in equipment rooms, which have good radiation shielding performance and can effectively prevent radioactive substances from spreading outward.

[0003] When decommissioning a large tank of high-level liquid waste, it is necessary to cut the tank into smaller, easier-to-handle components. Due to the high level of residual radioactivity inside the tank, close access by personnel must be strictly restricted to ensure personnel safety. Therefore, the cutting of high-level liquid waste tanks is usually done by remote control.

[0004] However, in the prior art, when a remote-control cutting method is used, a larger hole is usually opened at the top of the equipment room, which increases the risk of radioactive substances spreading from the hole at the top of the equipment room to the external environment. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a method and system for cutting a large tank of high-level radioactive liquid waste in view of the above-mentioned deficiencies in the prior art. By using this method, the area of ​​the top opening of the equipment room can be reduced, thereby reducing the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment.

[0006] In a first aspect, the present invention provides a method for cutting a large can of high-level radioactive liquid waste, wherein the large can is installed in an equipment room, comprising:

[0007] S1. Open the first opening at the top of the equipment room;

[0008] S2. A first opening is formed on the top of the large tank according to the first opening so that the cutting tool can extend into the interior of the large tank;

[0009] S3. Cut the vertical pipe inside the large tank to release the operating space inside the large tank;

[0010] S4. Cut the top, side wall and bottom of the large tank in sequence, and take out the cut pieces through the second opening in the equipment room.

[0011] In some embodiments, the first opening is located at the center of the top of the equipment room, and step S2 specifically includes:

[0012] The top of the large tank is cut according to the first opening of the equipment room, and a first opening having the same size as the first opening is formed at a position aligned with the first opening.

[0013] In some embodiments, step S3 specifically includes:

[0014] S31. Cutting the bottom of the vertical pipe;

[0015] S32. Cut the remaining vertical pipes piece by piece from bottom to top until they are close to the bottom of the tank top, so that the vertical pipes are cut into multiple sections.

[0016] In some embodiments, step S4 specifically includes:

[0017] S41. Cutting the top of the large tank from below the tank top to cut out a plurality of first blocks;

[0018] S42. Take the first block out from the second opening; wherein the second opening is located at the top of the equipment room and does not overlap with the first opening;

[0019] S43. Cutting the side wall of the large tank to cut out a plurality of second blocks;

[0020] S44. Taking out the second block from the second opening;

[0021] S45. Cutting the bottom of the large tank to cut out a plurality of third blocks;

[0022] S46. Take out the third block from the second opening.

[0023] In some embodiments, step S32 specifically includes:

[0024] Cut the vertical pipe section by section from bottom to top until it is close to the bottom of the tank top, so that the vertical pipe is cut into multiple sections and multiple first residual sections remaining on the top of the large tank;

[0025] Step S41 specifically includes:

[0026] Cut the top of the large tank and the first residual section from below the tank top, so that the top of the large tank is cut into a plurality of first blocks and a plurality of second residual sections remaining on the side wall of the large tank;

[0027] Step S43 specifically includes:

[0028] Cutting the side wall of the large tank and the second residual segment, so that the side wall of the large tank is cut into a plurality of second blocks and a plurality of third residual segments remaining at the bottom of the large tank;

[0029] Step S45 specifically includes:

[0030] The bottom of the large tank and the third residual segment are cut so that the bottom of the large tank is cut into a plurality of third blocks.

[0031] In some embodiments, the method further comprises:

[0032] S01. Determine the first threshold and the second threshold according to the size of the second opening;

[0033] S02. Determine the length of the first block, the length of the second block, and the length of the third block according to a first threshold, and determine the width of the first block, the width of the second block, and the width of the third block according to a second threshold.

[0034] In some embodiments, the method further comprises:

[0035] A third opening is arranged at the top of the equipment room to connect the third opening to the exhaust gas purification system outside the equipment room. When the first opening and / or the second opening in the equipment room is opened, the airflow direction at the third opening is controlled to flow from the equipment room to the exhaust gas purification system, so that the airflow direction at the first opening and / or the second opening flows from outside the equipment to inside the equipment room.

[0036] In a second aspect, the present invention further provides a high-level radioactive waste can cutting system, wherein the can is installed in an equipment room, and the system comprises:

[0037] A hole-opening device, used for opening a first hole at the top of the equipment room;

[0038] A first cutting device, used to form a first opening on the top of the large can according to the first opening, so that a cutting tool can extend into the interior of the large can;

[0039] The second cutting device is used to cut the vertical pipe inside the large tank to release the operating space inside the large tank;

[0040] The third cutting device is used to cut the top, side wall and bottom of the large tank in sequence;

[0041] The taking-out device is used to take out the cut blocks formed after cutting through the second opening of the device chamber.

[0042] In some embodiments, the first cutting device uses a laser cutting tool; the second cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool; and the third cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool.

[0043] In some embodiments, the first opening is located at a central position of a top portion of the equipment chamber.

[0044] The method for cutting a large tank of high-level liquid waste of the present invention can release the operating space inside the large tank by opening the first opening at the top of the equipment room, forming the first opening at the top of the large tank, and cutting the vertical pipe inside the large tank, and then cut the top of the large tank, the side wall of the large tank, and the bottom of the large tank in turn, and take out the cut pieces formed after cutting through the second opening of the equipment room, which can reduce the area of ​​the top opening of the equipment room, thereby helping to reduce the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A flow chart of a method for cutting a large tank of high-level radioactive liquid waste provided by an embodiment of the present invention;

[0046] Figure 2 A flowchart of an application example of a method for cutting a large tank of high-level radioactive liquid waste provided by an embodiment of the present invention;

[0047] Figure 3 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0048] Figure 4 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0049] Figure 5 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0050] Figure 6 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0051] Figure 7 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0052] Figure 8 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0053] Fig. 9 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0054] Fig.10 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0055] Fig.11 A schematic structural diagram of a large tank in a method for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention;

[0056] Fig.12A structural diagram of a control device for cutting a large tank of high-level radioactive liquid waste provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make those skilled in the art better understand the technical scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and Examples. It should be understood that the specific embodiments described herein are only intended to explain the application, rather than to limit the application. For those skilled in the art, the application can be implemented when some details in these specific details are not needed. The following description of the embodiments is only for providing a better understanding of the application by illustrating the examples of the application.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0059] In the related art, when a remote-controlled cutting method is used, the top of the large tank is usually cut as a whole first. This cutting method requires opening a hole at the top of the equipment room with an area roughly the same as the top of the large tank. The top of the equipment room is basically in a fully open state, resulting in the area of ​​the hole at the top of the equipment room being too large, increasing the risk of radioactive substances spreading from the hole at the top of the equipment room to the external environment.

[0060] The inventors have found that a vertical pipe for cooling high-level waste liquid when storing it is installed inside the large tank, and the vertical pipes are densely distributed inside the large tank. By opening a first opening at the top of the equipment room and forming a first opening at the top of the large tank, and then cutting the vertical pipe inside the large tank, the operating space inside the large tank can be released, so that it is convenient to cut the top, side wall and bottom of the large tank from inside the large tank. Thereby, the area of ​​the top opening of the equipment room can be reduced, which is conducive to reducing the risk of radioactive substances spreading from the top opening of the equipment room to the external environment.

[0061] Based on this, in order to solve the problems of the prior art, the present invention proposes that this embodiment provides a method for cutting a large tank of high-level radioactive liquid waste to reduce the area of ​​the top opening of the equipment room and reduce the risk of radioactive substances spreading from the top opening of the equipment room to the external environment.

[0062] Embodiment 1:

[0063] like Figure 1 As shown, this embodiment provides a method for cutting a large tank of high-level radioactive liquid waste, comprising steps S1 to S4:

[0064] Step S1. Open a first opening at the top of the equipment room.

[0065] Here, the equipment room is used to install a large tank of high-level waste liquid, and the material used in the equipment room can be a material with good radiation shielding performance, such as concrete. In some embodiments, the equipment room is arranged below the ground, and the large tank of high-level waste liquid is installed in the equipment room during service, and the equipment room can effectively prevent the radioactive material in the large tank of high-level waste liquid from spreading to the environment outside the equipment room.

[0066] It should also be noted that the shape of the top of the equipment room can be determined according to the shape of the high-level radioactive liquid waste tank. For example, for a high-level radioactive liquid waste tank with a rectangular shape, the equipment room can be in the shape of a rectangular block, and the top of the equipment room is rectangular; for a high-level radioactive liquid waste tank with a cylindrical shape, the equipment room can be in the shape of a cylinder, and the top of the equipment room is circular.

[0067] The number of the first openings may be one or more (for example, one of three, four, six, etc.). When the number of the first openings is one, the first opening may be opened at the center of the top of the equipment room; when the number of the first openings is more than one, multiple first openings may be opened symmetrically at the top of the equipment room.

[0068] In some embodiments, the number and position of the first openings can be determined based on the length of the robotic arm of the cutting tool. Specifically, if the length of the robotic arm is extended enough to cover the maximum length of the line through the center of the large tank (for example, when the large tank is a cylinder, the maximum length of the line through the center of the large tank is the diameter of the large tank; when the large tank is a cuboid, the maximum length of the line through the center of the large tank is the length of the horizontal diagonal of the large tank), then a first opening is opened at the center of the top of the equipment room. If the length of the robotic arm is not extended enough to cover the maximum length of the line through the center of the large tank, in order to fully cover the operating area of ​​the large tank, 3, 4, 6, etc., first openings can be symmetrically opened at the top of the equipment room.

[0069] like Figure 4As shown, a first opening A is opened at the top of the equipment room 11. The length of the robot arm 31 is extended enough to cover the maximum length L of the center line of the large tank, and a first opening A is opened at the center position of the top of the equipment room.

[0070] It should also be noted that the shape of the first opening can be rectangular or circular. In some embodiments, the first opening is set to be rectangular to meet the requirement that the manipulator of the cutting device can easily enter and exit the device room.

[0071] Step S2. Form a first opening on the top of the large can according to the first opening, so that a cutting tool can extend into the interior of the large can.

[0072] Here, the first opening is used to allow the cutting tool to extend into the interior of the large tank. The cutting tool comprises a mechanical arm and a tool head, and the tool head can be a laser cutting tool head and its system, a hydraulic shear tool head or other tool heads.

[0073] During implementation, a first opening having the same size as the first opening can be formed at a position aligned with the first opening, or a first opening smaller than the first opening can be formed, as long as the formed first opening allows the cutting tool to extend into the interior of the large can.

[0074] like Figure 4 As shown, a first opening 25 is formed on the top 21 of the large can according to the first opening A, so that the cutting tool 31 can extend into the interior of the large can.

[0075] Step S3: cutting the vertical pipe inside the large tank to release the operating space inside the large tank.

[0076] Here, the vertical pipe is an internal hollow structure. During the service period of the tank (when storing high-level waste liquid), there is coolant inside the vertical pipe inside the tank to cool the high-level waste liquid. The vertical pipes inside the tank are densely distributed. After the cutting tool is inserted into the tank, the vertical pipes are cut to release the operating space inside the tank. It can be understood that the operating space inside the tank is the operating space required for the extension of the robotic arm.

[0077] like Figure 4 As shown, after the cutting tool 31 is extended into the interior of the large tank, it uses the vertical direction as the rotation axis to cut from the vertical pipe close to the center of the large tank to the vertical pipe close to the side wall of the large tank, gradually releasing the operating space inside the large tank.

[0078] Step S4. Cut the top, side wall and bottom of the large tank in sequence, and take out the cut pieces through the second opening of the equipment room.

[0079] Here, the second opening of the equipment room is located at the top of the equipment room, and it can be an opening that does not overlap with the first opening to facilitate the simultaneous cutting of large cans and the removal of cut pieces, thereby improving work efficiency; in some embodiments, the second opening can also be an opening that overlaps with the first opening to reduce the area of ​​the opening at the top of the equipment room.

[0080] During the implementation, the cutting tool can be used to cut the top of the large tank from the inside to the top, further freeing up the operating space. After the top of the large tank is cut, the side wall and the bottom of the large tank are cut, thereby completing the cutting operation of the entire large tank. Finally, the cut pieces formed after cutting are taken out through the second opening of the equipment room for subsequent transportation and processing.

[0081] like Figure 4 , Figure 5 As shown, the top 21, the side wall 23 and the bottom 24 of the large tank are cut in sequence, and the cut pieces formed after cutting are taken out through the second opening B of the equipment room.

[0082] It should also be noted that the shape of the second opening can be rectangular or circular, or other shapes. In some embodiments, the shape of the second opening is rectangular, which is the same as the shape of each cut block formed after cutting, so as to facilitate the removal of each cut block from the equipment room. In some embodiments, the shape of the second opening is circular, and a circular standard container is placed into the equipment room through the second opening. During the cutting process, each cut block can be temporarily placed in the circular standard container. After any part (the top of the large tank, the side wall of the large tank, and the bottom of the large tank) is cut, the circular standard container temporarily storing the cut blocks of this part is taken out from the second opening, so as to reduce the number of times the second opening is opened to take out the cut blocks, thereby improving work efficiency.

[0083] In this embodiment, by opening the first opening at the top of the equipment room, forming the first opening at the top of the large tank, and cutting the vertical pipe inside the large tank, the operating space inside the large tank can be released, and then the top, side wall, and bottom of the large tank are cut in turn, and the cut blocks formed after cutting are taken out through the second opening in the equipment room, the area of ​​the top opening of the equipment room can be reduced, which is beneficial to reducing the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment.

[0084] In some embodiments, the first opening is located at the center of the top of the equipment room, and step S2 specifically includes:

[0085] The top of the large tank is cut according to the first opening of the equipment room, and a first opening having the same size as the first opening is formed at a position aligned with the first opening.

[0086] Here, the size of the first opening of the equipment chamber may be the size required in the horizontal direction for the cutting tool to extend into the interior of the large tank. For example, the size of the first opening may be the maximum diameter of the telescopic shaft (telescopic sleeve) of the cutting device. Accordingly, the size of the first opening may be the maximum diameter of the telescopic shaft of the cutting device so that the cutting tool can extend into the interior of the large tank.

[0087] In some other embodiments, the size of the first opening is the minimum diameter size of the telescopic shaft of the cutting device, that is, as long as the cutting device can be extended into the interior of the large tank.

[0088] In this embodiment, by cutting the top of the large tank and forming the first opening, the cutting tool can be easily inserted into the interior of the large tank and cut the large tank from inside the large tank, thereby reducing the area of ​​the top opening of the equipment room, which is beneficial to reducing the diffusion of radioactive substances from the top opening of the equipment room to the external environment.

[0089] In some embodiments, step S3 specifically includes steps S31 to S32:

[0090] Step S31: Cut the bottom of the vertical pipe.

[0091] Here, the vertical pipes are laid out using the top of the tank for support, e.g. Figure 4 As shown, the vertical pipes are bent at the top of the tank to form condensation pipes that are interconnected inside the pipes, so as to cool the high-level waste liquid inside the tank during its service.

[0092] It is understandable that by cutting the bottom of the vertical pipe first, the support effect of the top of the large tank on the vertical pipe can be utilized to reduce the vibration of the vertical pipe cutting process and improve the cutting quality of the vertical pipe.

[0093] It should also be noted that if Figure 4 As shown, the bottom of the vertical pipe can be cut by reciprocating the telescopic shaft 32 as the rotation center to cut off each vertical pipe, gradually cut the vertical pipe close to the side wall of the large tank, and release all the working space at the bottom of the vertical pipe inside the large tank.

[0094] Step S32: The remaining vertical pipes are cut section by section from bottom to top until they are close to the bottom of the tank top, so that the vertical pipes are cut into multiple sections.

[0095] Here, the cutting method can be laser cutting or electric hydraulic shears. In some embodiments, the cutting method is laser cutting, and for vertical pipes of different sizes and corresponding cutting parameters: for Φ57×4mm pipes, the cutting speed range is 300mm~1200mm / min, and the air pressure is 4~10bar; for Φ108×5mm pipes, the cutting speed range is 300mm~900mm / min, and the air pressure is 4~12bar. When using electric hydraulic shears to cut Φ57×4mm pipes, the cutting speed range is 300~1800mm / min.

[0096] During implementation, the robotic arm is gradually lifted upwards through the telescopic sleeve, and the cutting head at the front end of the robotic arm cuts the vertical pipe section by section until it is close to the bottom of the tank top, releasing all the working space inside the large tank.

[0097] In this embodiment, by first cutting the bottom of the vertical pipe and then cutting the vertical pipe section by section from bottom to top, the supporting effect of the top of the large tank on the vertical pipe can be utilized to reduce the vibration of the vertical pipe cutting process and improve the cutting quality of the vertical pipe.

[0098] In some embodiments, step S4 specifically includes steps S41 to S46:

[0099] Step S41: Cut the top of the large can from below the can top to cut out a plurality of first blocks.

[0100] Here, the structure of the top of the large tank includes a thicker structure (such as an I-beam, etc.) and ordinary steel. In some embodiments, the ordinary steel on the top of the large tank is cut, and then the thicker I-beam is cut to reduce the difficulty of cutting.

[0101] In some embodiments, the structure of the large tank top and the corresponding cutting parameters are as follows: ①, 8mm stainless steel tank top, cutting speed range 300mm~1800mm / min, air pressure 2~8bar; ②, the close contact part between I-beam and 8mm stainless steel tank top, cutting speed range 60mm~600mm / min, air pressure 4~12bar.

[0102] When implementing, Figure 4 As shown, the mechanical arm 31 is lifted to below the tank top by the telescopic sleeve 32, and drives the cutting tool head 33 to move so as to cut off the top of the large tank.

[0103] Step S42. Take out the first block from the second opening; wherein the second opening is located at the top of the equipment room and has no overlap with the first opening.

[0104] Here, the second opening is located at the top of the equipment room and has no overlap with the first opening, that is, the large can cutting and the block removal operations can be carried out simultaneously to improve the operating efficiency.

[0105] It can be understood that taking out the first block from the second opening also provides working space for the subsequent cutting of the side wall of the large tank.

[0106] Step S43: Cut the side wall of the large tank to cut out a plurality of second blocks.

[0107] Here, the block cutting of the side wall of the large tank includes cutting in two dimensions: horizontal and vertical: the cutting in the horizontal direction can be carried out in several times, and the arc surface corresponding to each horizontal cutting can be 30 to 300°; when cutting in the vertical direction, the cutting trajectory is from bottom to top.

[0108] The side wall of the large tank is a stainless steel plate with a thickness of 6 to 8 mm. In some embodiments, the cutting parameters of the side wall of the large tank are as follows: the cutting speed ranges from 300 mm to 1800 mm / min, and the air pressure ranges from 2 to 8 bar.

[0109] Step S44: Take out the second block from the second opening.

[0110] It can be understood that taking out the second block from the second opening can provide working space for the subsequent cutting of the bottom of the large tank.

[0111] Step S45: cutting the bottom of the large tank to obtain a plurality of third blocks.

[0112] Here, when using laser to cut the bottom of a large tank, the cutting parameters are as follows: cutting speed range 200mm~1200mm / min, air pressure 2~8bar, angle between laser cutting head and the bottom plate of the large tank is 25-90°. Optionally, an electric circular saw can be used to cut the bottom plate of the large tank, with a cutting thickness of not less than 10mm and a cutting speed of about 100~600mm / min.

[0113] like Fig. 9 As shown, there are condensation pipes distributed at the bottom of the large tank. In some embodiments, cutting can be performed first along the vertical direction of the condensation pipes, and then cutting can be performed along the straight direction of the condensation pipes to reduce the difficulty of cutting the bottom of the large tank.

[0114] Step S46: Take out the third block from the second opening.

[0115] It can be understood that after the first block, the second block and the third block are taken out, it can be convenient for the subsequent transportation of the large tank and other processing.

[0116] In this embodiment, by cutting the top of the large tank and taking out the first block, a working space can be provided for the subsequent cutting of the side wall of the large tank, and by cutting the side wall of the large tank and taking out the second block, a working space can be provided for the subsequent cutting of the bottom of the large tank. Then, the bottom of the large tank is cut and the third block is taken out, so that the large tank of high-level waste liquid can be cut under the condition that the opening area of ​​the first opening of the equipment room is limited, which is conducive to reducing the risk of radioactive substances spreading from the top opening of the equipment room to the external environment.

[0117] In some embodiments, step S32 specifically includes:

[0118] The vertical pipe is cut section by section from bottom to top until it approaches below the tank top, so that the vertical pipe is cut into a plurality of sections and a plurality of first residual sections remaining on the top of the large tank.

[0119] like Figure 6 and Figure 7 As shown, there are a plurality of first residual sections 41 remaining at the top of the large can. The size of the first residual section can be determined based on experience so that it can be cut and packaged together with the top of the large can later. For example, the size of the first residual section is between 0-200 mm.

[0120] Step S41 specifically includes:

[0121] The top of the large can and the first residual section are cut from below the can top, so that the top of the large can is cut into a plurality of first blocks and a plurality of second residual sections remaining on the side wall of the large can.

[0122] like Figure 7 and Figure 8 As shown, the top of the can is cut into a plurality of first blocks 52 and a plurality of second residual segments 42 remaining on the side wall of the can. The second residual segment can be determined based on experience so that it can be cut and packaged together with the side wall of the can later. For example, the size of the second residual segment is between 0-200 mm.

[0123] Step S43 specifically includes:

[0124] The side wall of the large tank and the second residual segment are cut so that the side wall of the large tank is cut into a plurality of second blocks and a plurality of third residual segments remaining at the bottom of the large tank.

[0125] like Figure 8 and Fig.10 As shown, the side wall of the large can is cut into a plurality of second blocks 53 and a plurality of third residual segments 43 remaining at the bottom of the large can. The third residual segment can be determined based on experience so that it can be cut and packaged together with the bottom of the large can later. For example, the size of the third residual segment is between 0-200 mm.

[0126] Step S45 specifically includes:

[0127] The bottom of the large tank and the third residual segment are cut so that the bottom of the large tank is cut into a plurality of third blocks.

[0128] like Fig.11 As shown, the bottom of the large tank is cut into a plurality of third sections 54 .

[0129] In this embodiment, the cutting efficiency can be improved by cutting the remainder of the first residual segment and subsequently cutting it together with the top of the large tank, the remainder of the second residual segment and subsequently cutting it together with the side wall of the large tank, and the remainder of the third residual segment and subsequently cutting it together with the bottom of the large tank.

[0130] In some embodiments, the method further includes steps S01 to S02:

[0131] Step S01. Determine a first threshold and a second threshold according to the size of the second opening;

[0132] Step S02. Determine the length of the first block, the length of the second block, and the length of the third block according to a first threshold, and determine the width of the first block, the width of the second block, and the width of the third block according to a second threshold.

[0133] Here, the shape of the second opening can be rectangular or circular, or other shapes. In some embodiments, the shape of the second opening is rectangular, wherein the first threshold is determined according to the length of the second opening, and the second threshold is determined according to the width of the second opening. The first threshold and the second threshold are used to determine the size of each block obtained by cutting the large can.

[0134] In some embodiments, a rectangular standard container is arranged in the equipment room for temporarily storing the cut blocks inside the equipment room, and the length and width of the standard container are also determined according to the size of the second opening.

[0135] In some embodiments, reference Figure 5 The diameter L1 of the top of the equipment room is, for example, 10300mm. The first opening A is rectangular, and the size range of the first opening A is 500*800mm~700*1200mm. The second opening B and the third opening C are circular, and the diameter range of the second opening B is 500mm~800mm, and the diameter range of the third opening C is 200mm~400mm.

[0136] For example, the diameter L1 of the top of the equipment room is 10300mm, the first opening A is rectangular, the size of the first opening A is 700*1200mm, the second opening B and the third opening C are circular, the diameter of the second opening B is about 600mm, and the diameter of the third opening C is about 300mm. The sum of the areas of the openings is 119300mm.2 , the area of ​​the top of the equipment room is 83280000mm 2 , the ratio of the area of ​​each opening to the area of ​​the top of the equipment room is 1.4%. Thus, compared with the method of opening all the holes at the top of the equipment in the prior art, the implementation method of the present invention can greatly reduce the area of ​​the opening at the top of the equipment room, and effectively reduce the risk of radioactive substances diffusing from the opening at the top of the equipment room to the external environment.

[0137] In this embodiment, by determining the first threshold and the second threshold, determining the length of the first block, the length of the second block, and the length of the third block, and determining the width of the first block, the width of the second block, and the width of the third block, it is convenient to place each block in a standard container in the equipment room, and then take each block out from the second opening of the equipment room by pulling the standard container. In this way, the area of ​​the top opening of the equipment room can be greatly reduced, and the risk of radioactive substances spreading from the top opening of the equipment room to the external environment can be effectively reduced.

[0138] In some embodiments, the method further comprises step S5:

[0139] Step S5. A third opening is provided at the top of the equipment room to connect the third opening to the exhaust gas purification system outside the equipment room. When the first opening and / or the second opening of the equipment room is opened, the direction of the airflow at the third opening is controlled to flow from the equipment room to the exhaust gas purification system, so that the direction of the airflow at the first opening and / or the second opening flows from outside the equipment to inside the equipment room.

[0140] Here, the third opening is arranged at the top of the equipment room and at a position which does not overlap with the first opening and the second opening.

[0141] The third opening is connected to the exhaust gas purification system outside the equipment room. When the first opening and / or the second opening in the equipment room is opened, the direction of the airflow at the third opening can be controlled to flow from the equipment room to the exhaust gas purification system, so that the direction of the airflow at the first opening and / or the second opening flows from outside the equipment to inside the equipment room, thereby further reducing the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment.

[0142] In addition, the third opening is connected to the exhaust gas purification system, and can also be used to process the aerosols generated during cutting, so as to discharge the aerosols out of the equipment room in time and achieve purification of the equipment room.

[0143] In this embodiment, by setting the third opening, the third opening is connected to the exhaust gas purification system, so that when the first opening and the second opening of the equipment room are opened, the direction of the airflow at the first opening and the second opening flows from outside the equipment to inside the equipment room, thereby further reducing the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment.

[0144] Embodiment 2:

[0145] The specific implementation process of the above method is described below in conjunction with specific application examples.

[0146] The purpose of this embodiment is to provide a method for cutting a large tank of high-level liquid waste, so as to meet the need for cutting the internal radioactive metal parts and the tank body itself when the large tank is decommissioned.

[0147] To achieve the above purpose, Figure 2 As shown, the technical solution adopted in this embodiment includes steps 100 to 600:

[0148] Step 100, cutting the vertical pipe in the tank to release the operating space in the tank.

[0149] Specifically, after the cutting device is ready, start the exhaust gas purification system connected to the opening C (the third opening); use the lifting device to lift the cover plate 4 of the central opening A (the first opening) according to path ①, and move the cutting device stand 1 (cutting equipment) to the top of the central opening A according to path ②. The telescopic sleeve 2 sends the robot arm 3 carrying the laser cutting tool head into the large tank. Figure 3 shown.

[0150] Optionally, the number of holes on the tank top is related to the arm span. When the arm span is insufficient, multiple holes need to be opened on the tank top to fully cover the operating area. The selectable number of holes on the tank top is 3, 4, or 6.

[0151] Furthermore, the robotic arm carries a laser cutting tool head to cut the vertical pipes inside the large tank: when selecting the pipe to be cut, it expands from the hole to the surrounding areas; when cutting a single vertical pipe, it cuts the pipe close to the bottom of the pipe first, and then cuts it section by section until it reaches below the top of the tank.

[0152] Preferably, when the robot arm carries a laser cutting tool head to cut the pipe, the laser cutting tool head cuts on one side of the pipe, such as Figure 4 shown.

[0153] Furthermore, when a manipulator is used to carry a laser cutting tool head for long-distance cutting, the laser cutting tool head is located on one side of the vertical pipe, and the pipe is cut by the reciprocating motion of the laser cutting head. Common pipe models and corresponding cutting parameters: Φ57×4mm pipe, cutting speed range 300mm~1200mm / min, air pressure 4~10bar; Φ108×5mm pipe, cutting speed range 300mm~900mm / min, air pressure 4~12bar; When using electric hydraulic shears to cut Φ57×4mm pipes, the cutting speed range is 300~1800mm / min;

[0154] Furthermore, a certain "piling" height can be reserved at the connection between the vertical pipe and the tank top, and then cut together with the tank top, such as Figure 6 Optionally, the pile size can be selected in the range of 0-200mm.

[0155] Optionally, when cutting the pipe, the length of the cut pipe section should be controlled not to exceed 800mm.

[0156] Step 200, cutting the top plate and auxiliary structure of the large tank (top of the large tank) to open up the waste retrieval channel.

[0157] Specifically, after the pipe cutting inside the tank is completed, the robot controls the laser cutting tool head to cut the tank top in blocks, and the large tank top plate and the top plate auxiliary structure are cut in a classified manner through block cutting; the "piles" of the vertical pipes remaining on the tank top are cut together with the tank top, such as Figure 6 shown.

[0158] Optionally, when there is a thick structure (I-beam, etc.) above the top plate of a large tank, you can choose to cut the rest of the tank top first, and then cut the thicker part;

[0159] Optionally, during cutting, the size of each block (the first block, the second block, and the third block) should be controlled to not exceed 400×400 mm;

[0160] Preferably, when cutting the tank top, the laser cutting tool head is located on the lower side of the tank top, and the pipeline is cut off by the movement of the laser cutting head. Common structures of tank tops and corresponding cutting parameters are: ①, 8mm stainless steel tank top, cutting speed range 300mm~1800mm / min, air pressure 2~8bar; ②, the part close to the I-beam and the 8mm stainless steel tank top, cutting speed range 60mm~600mm / min, air pressure 4~12bar.

[0161] Preferably, after the tank top is cut into pieces, there is a residual structure at the connection between the tank top and the side wall. The size of the residual part should be controlled to be no more than 200 mm, so that it can be cut and packaged together with the side wall. Figure 8 shown.

[0162] Step 300, retrieve the cut pieces from the tank bottom and transport them out.

[0163] Specifically, after the tank top is cut, the robot arm is equipped with a clamp to grab the waste, retrieve it into the container, and transport it out of the tank through the waste channel opening B (the second opening);

[0164] Step 400, cutting the bottom pipe, side wall (side wall of the tank), etc. of the large tank, and taking out the cut pieces.

[0165] After the waste is retrieved from the large tank pipe and tank top, the side wall opening can be cut significantly. The side wall arc surface is cut in blocks. The block cutting diagram is as follows Figure 8 As shown, the size should be controlled not to exceed 400×400mm during cutting, and the remaining part of the tank top should be cut together with the side wall. ;

[0166] Preferably, when cutting the side wall of a large tank, the laser cutting tool head is located on the inside of the large tank, and the side wall cutting is achieved by unilateral movement of the laser cutting head. The side wall is generally a 6-8 mm stainless steel plate, and the cutting parameters are as follows: cutting speed range 300 mm to 1800 mm / min, air pressure 2 to 8 bar.

[0167] Preferably, the block cutting of the side wall of the large tank includes cutting in two dimensions: horizontal and vertical: the cutting in the horizontal direction can be performed in multiple times, and the arc surface corresponding to each horizontal cutting can be 30 to 300 degrees; when cutting in the vertical direction, the cutting track should be from bottom to top;

[0168] Optionally, a certain height of the side wall structure will remain at the connection part with the tank bottom, which will be cut together with the tank bottom. The height of the remaining side wall should be controlled not to exceed 200mm. Fig.10 shown.

[0169] After the sidewall cutting is completed, the robot arm uses a clamp to grab the sidewall cut pieces, retrieve them into the container, and transport them out of the tank through the waste channel opening B;

[0170] Step 500, vacuum the bottom plate of the large tank to clean up the cutting residues.

[0171] Specifically, before cutting the bottom plate of a large tank, a vacuum device is used to clean the cutting residues at the bottom of the tank, and the vacuumed waste is collected, loaded into a container, and transported out;

[0172] Step 600, cutting the bottom plate of the large tank (the bottom of the large tank), retrieving the cut pieces, and cleaning the residue.

[0173] Here, after the tank bottom cutting residue is cleaned in step 500, the tank bottom structure is cut. The trajectory of the block cutting is controlled to be parallel to the direction of the tube bottom support plate and perpendicular to the direction of the tube bottom support plate, and the block size is controlled not to exceed 400×400mm. Fig.11 shown.

[0174] Preferably, when using laser to cut the bottom of a large tank, the cutting parameters are as follows: cutting speed range 200mm~1200mm / min, air pressure 2~8bar, and the angle between the laser cutting head and the bottom plate of the large tank is 25-90°.

[0175] Optionally, an electric circular saw can be used to cut the bottom plate of a large tank, with a cutting thickness of not less than 10 mm and a cutting speed of about 100 to 600 mm / min.

[0176] Furthermore, after the side wall cutting is completed, the robot arm uses a clamp to grab the side wall cut pieces, retrieves them into the container, and transports them out of the tank through the waste channel opening B; and uses a dust suction device to clean the cutting residues.

[0177] After the cutting is completed, the robot arm is retracted from the central opening A, and the cover plates of the central opening A and the waste channel opening B are replaced.

[0178] It should also be noted that in steps 100 to 600, the cutting of the pipes, top plates and ancillary structures, side walls and bottom plates of the high-pressure enlargement tank, the retrieval of cut pieces and the cleaning of residues are all performed using a set of long-distance cutting devices.

[0179] Preferably, the cutting device includes a manipulator system, a tool head, a monitoring system, and a control system. The manipulator system includes a manipulator arm system, a mobile stand, a control system, and a sensing and monitoring system; the tool head includes a laser cutting tool head and its system, a circular saw tool head, a hydraulic shear tool head, a clamp tool head, a pick rod tool head, a vacuum tool head, etc.

[0180] Preferably, when selecting cutting tools, the laser cutting tool head is used as the main cutting method, hydraulic shears are used as an alternative method for pipe cutting, and circular saws are used as an alternative method for tank bottom cutting. Optionally, the hydraulic shear type is an electric hydraulic shear, which can meet the shearing of typical pipes such as 57*4mm and 63*5mm, and the weight of the equipment should not exceed 35Kg; the cutting depth of the circular saw for stainless steel should not be less than 10mm;

[0181] Preferably, operating openings are provided on the top of the large tank: the central opening A is used for the installation of the cutting device and the robot arm and for entering the large tank, thereby reducing the requirements for the operating radius of the robot arm; the waste channel opening B is used as a channel for removing cut waste.

[0182] Optionally, the number of holes for installing the cutting device is related to the extension of the robot arm. When the extension of the robot arm is sufficient, one hole can be opened in the center of the large tank to achieve full coverage of the cutting area of ​​the large tank. If the extension of the robot arm is not sufficient, in order to fully cover the operating area, the number of holes on the tank top that can be selected is 3, 4, or 6 respectively.

[0183] Preferably, when cutting a large tank, the cross-sectional area of ​​the openings on the tank top and the top of the equipment room is increased, and the original ventilation system is generally unable to effectively organize the direction of the airflow; in order to control aerosols during cutting, another opening C is required on the tank top and connected to the exhaust gas purification system to discharge and purify the cutting exhaust gas generated in the equipment room in time, ensuring that the airflow direction when the central opening A and the waste channel opening B are opened is from the outside to the equipment room; optionally, the purified cutting exhaust gas can be connected to the factory exhaust system; optionally, a hole is opened in the top cover of the large tank equipment room for the inlet and outlet of the cutting device and the installation channel of the camera and lighting equipment; at the same time, the manhole and other holes are used as auxiliary channels;

[0184] Preferably, the pipe segments and blocks produced by cutting large tanks should be of controlled size to facilitate loading into standard containers; the length of the pipe segment should not exceed 800mm, and the size of the block (length × width) should not exceed 400 × 400mm;

[0185] In this embodiment, by cutting the vertical pipes in the tank, cutting the top plate and auxiliary structures of the large tank, retrieving the cut pieces of the tank bottom, cutting the pipes and side walls at the bottom of the large tank, vacuuming the bottom plate of the large tank, and cutting the bottom plate of the large tank, the cutting operation can be carried out in a narrow space, reducing the area of ​​the top opening of the equipment room, and reducing the risk of radioactive substances diffusing from the top opening of the equipment room to the external environment.

[0186] Embodiment 3:

[0187] The present invention also provides a high-level radioactive waste can cutting system, wherein the can is installed in an equipment room, and the system comprises:

[0188] A hole-opening device, used for opening a first hole at the top of the equipment room;

[0189] A first cutting device, used to form a first opening on the top of the large can according to the first opening, so that a cutting tool can extend into the interior of the large can;

[0190] The second cutting device is used to cut the vertical pipe inside the large tank to release the operating space inside the large tank;

[0191] The third cutting device is used to cut the top, side wall and bottom of the large tank in sequence;

[0192] The taking-out device is used to take out the cut blocks formed after cutting through the second opening of the device chamber.

[0193] In some embodiments, the first cutting device uses a laser cutting tool to form a first opening on the top of the large tank according to the first opening; the second cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool to cut the vertical pipe inside the large tank; the third cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool to cut the top, side wall and bottom of the large tank in turn.

[0194] In some embodiments, the first opening is located at a central position of a top portion of the equipment chamber.

[0195] In this embodiment, a system for cutting large tanks of high-level liquid waste is formed by means of a hole-making device for making a first opening at the top of the equipment room, a cutting device for cutting the large tank, and a removal device for removing the cut pieces formed after cutting. The cutting system can perform cutting operations in a narrow space, reduce the area of ​​the hole at the top of the equipment room, and reduce the risk of radioactive substances spreading from the hole at the top of the equipment room to the external environment.

[0196] Embodiment 4:

[0197] like Fig.12 As shown, the present invention also provides a control device for a method of cutting a large tank of high-level radioactive waste, which is used for remote control operation. The large tank is installed in an equipment room. The device 100 includes:

[0198] The opening module 11 is used to open a first opening at the top of the equipment room;

[0199] A first cutting module 12, connected to the hole opening module 11, is used to form a first opening on the top of the large tank according to the first hole opening, so that a cutting tool can extend into the interior of the large tank;

[0200] The second cutting module 13 is connected to the first cutting module 12 and is used to cut the vertical pipe inside the large tank to release the operating space inside the large tank;

[0201] The processing module 14 is connected to the second cutting module 13, and is used to cut the top, side wall and bottom of the large tank in sequence, and take out the cut blocks through the second opening of the equipment room.

[0202] In some embodiments, the first opening is located at the center of the top of the equipment room, and the first cutting module 12 is also used to cut the top of the large tank according to the first opening of the equipment room, forming a first opening of the same size as the first opening at a position aligned with the first opening.

[0203] In some embodiments, the second cutting module 13 includes:

[0204] A first cutting unit, used for cutting the bottom of the vertical pipe;

[0205] The second cutting unit is connected to the first cutting unit and is used to cut the remaining vertical pipes section by section from bottom to top until it is close to the bottom of the tank top, so that the vertical pipes are cut into multiple sections.

[0206] In some embodiments, the processing module 14 includes:

[0207] a third cutting unit, used for cutting the top of the large tank from below the tank top to cut out a plurality of first blocks;

[0208] A first taking-out unit, connected to the third cutting unit, for taking out the first block from the second opening; wherein the second opening is located at the top of the equipment room and has no overlap with the first opening;

[0209] A fourth cutting unit, connected to the first taking-out unit, is used to cut the side wall of the large tank to cut out a plurality of second blocks;

[0210] A second taking-out unit, connected to the fourth cutting unit, for taking out the second block from the second opening;

[0211] a fifth cutting unit connected to the second taking-out unit, and used for cutting the bottom of the large can to cut out a plurality of third blocks;

[0212] The third taking-out unit is connected to the fifth cutting unit and is used for taking out the third block from the second opening.

[0213] In some embodiments, the second cutting unit is further used to cut the vertical pipe segment by segment from bottom to top until it is close to the bottom of the tank top, so that the vertical pipe is cut into a plurality of segments and a plurality of first residual segments remaining on the top of the large tank;

[0214] The third cutting unit is further used to cut the top of the large tank and the first residual segment from below the tank top, so that the top of the large tank is cut into a plurality of first blocks and a plurality of second residual segments remaining on the side wall of the large tank;

[0215] The fourth cutting unit is further used to cut the side wall of the large tank and the second residual segment, so that the side wall of the large tank is cut into a plurality of second blocks and a plurality of third residual segments remaining at the bottom of the large tank;

[0216] The fifth cutting unit is also used to cut the bottom of the large tank and the third residual segment, so that the bottom of the large tank is cut into a plurality of third blocks.

[0217] In some embodiments, the control device further comprises:

[0218] A first determination module, used to determine a first threshold and a second threshold according to a size of a second opening;

[0219] The second determination module is connected to the first determination module, and is used to determine the length of the first block, the length of the second block, and the length of the third block according to a first threshold, and to determine the width of the first block, the width of the second block, and the width of the third block according to a second threshold.

[0220] In some embodiments, the control device further comprises:

[0221] The purification module is used to control the direction of the airflow at the third opening to flow from the equipment room to the exhaust gas purification system when the first opening and / or the second opening of the equipment room is opened, so that the direction of the airflow at the first opening and / or the second opening flows from outside the equipment to inside the equipment room.

[0222] It should be noted that this embodiment is a control device corresponding to the high-level radioactive liquid waste tank cutting method in the above-mentioned embodiment 1. The control device can be used to implement the method in embodiment 1. The specific implementation method can refer to the description of the high-level radioactive liquid waste tank cutting method, and this embodiment will not be repeated here.

[0223] Embodiment 5:

[0224] An embodiment of the present application may provide an electronic device, including a processor and a memory storing computer program instructions, wherein when the processor executes the computer program instructions, any one of the high-level liquid waste tank cutting methods in the above-mentioned embodiment 1 is implemented.

[0225] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0226] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0227] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A method for cutting a large tank of high-level liquid waste, characterized in that: The large tank is installed in the equipment room and includes: S1. Open the first opening at the top of the equipment room; S2. A first opening is formed on the top of the large tank according to the first opening so that the cutting tool can extend into the interior of the large tank; S3. Cut the vertical pipe inside the large tank to release the operating space inside the large tank; S4. Cut the top, side wall and bottom of the large tank in sequence, and take out the cut pieces through the second opening in the equipment room.

2. The method for cutting a large tank of high-level radioactive liquid waste according to claim 1, characterized in that: The first opening is located at the center of the top of the equipment room. Step S2 specifically includes: The top of the large tank is cut according to the first opening of the equipment room, and a first opening having the same size as the first opening is formed at a position aligned with the first opening.

3. The method for cutting a large tank of high-level radioactive liquid waste according to claim 2, characterized in that: Step S3 specifically includes: S31. Cutting the bottom of the vertical pipe; S32. Cut the remaining vertical pipes piece by piece from bottom to top until they are close to the bottom of the tank top, so that the vertical pipes are cut into multiple sections.

4. The method for cutting a large tank of high-level liquid waste according to claim 3, characterized in that: Step S4 specifically includes: S41. Cutting the top of the large tank from below the tank top to cut out a plurality of first blocks; S42. Take the first block out from the second opening; wherein the second opening is located at the top of the equipment room and does not overlap with the first opening; S43. Cutting the side wall of the large tank to cut out a plurality of second blocks; S44. Taking out the second block from the second opening; S45. Cutting the bottom of the large tank to cut out a plurality of third blocks; S46. Take out the third block from the second opening.

5. The method for cutting a large tank of high-level radioactive liquid waste according to claim 4, characterized in that: Step S32 specifically includes: Cut the vertical pipe section by section from bottom to top until it is close to the bottom of the tank top, so that the vertical pipe is cut into multiple sections and multiple first residual sections remaining on the top of the large tank; Step S41 specifically includes: Cut the top of the large tank and the first residual section from below the tank top, so that the top of the large tank is cut into a plurality of first blocks and a plurality of second residual sections remaining on the side wall of the large tank; Step S43 specifically includes: Cutting the side wall of the large tank and the second residual segment, so that the side wall of the large tank is cut into a plurality of second blocks and a plurality of third residual segments remaining at the bottom of the large tank; Step S45 specifically includes: The bottom of the large tank and the third residual segment are cut so that the bottom of the large tank is cut into a plurality of third blocks.

6. The method for cutting a large tank of high-level liquid waste according to claim 4, characterized in that: The method further comprises: S01. Determine the first threshold and the second threshold according to the size of the second opening; S02. Determine the length of the first block, the length of the second block, and the length of the third block according to a first threshold, and determine the width of the first block, the width of the second block, and the width of the third block according to a second threshold.

7. The method for cutting a large tank of high-level liquid waste according to any one of claims 1 to 6, characterized in that: The method further comprises: A third opening is provided at the top of the equipment room so that the third opening is connected to the exhaust gas purification system outside the equipment room. When the first opening and / or the second opening of the equipment room is opened, the direction of the airflow at the third opening is controlled to flow from inside the equipment room to the exhaust gas purification system, so that the direction of the airflow at the first opening and / or the second opening flows from outside the equipment to inside the equipment room.

8. A high-level radioactive waste tank cutting system, characterized in that: The large tank is installed in the equipment room, and the system includes: A hole-opening device, used for opening a first hole at the top of the equipment room; A first cutting device, used to form a first opening on the top of the large can according to the first opening, so that a cutting tool can extend into the interior of the large can; The second cutting device is used to cut the vertical pipe inside the large tank to release the operating space inside the large tank; The third cutting device is used to cut the top, side wall and bottom of the large tank in sequence; The taking-out device is used to take out the cut blocks formed after cutting through the second opening of the device chamber.

9. The high-level radioactive waste tank cutting system according to claim 8, characterized in that: The first cutting device uses a laser cutting tool; The second cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool; The third cutting device uses a telescopic sleeve to move the tool head of the laser cutting tool.

10. The high-level radioactive waste tank cutting system according to claim 8, characterized in that: The first opening is located at the center of the top of the equipment room.

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