Waste grouting fixing device and waste grouting fixing method

Abstract

The invention discloses a waste grouting fixing device and a waste grouting fixing method. The waste grouting fixing device comprises a shielding container, a container shielding plug used for sealing the shielding container, a metal barrel arranged in the shielding container, a barrel cover used for sealing the metal barrel and a container adapter used for being matched with the shielding container and capable of being opened and closed. When the shielding container receives radioactive waste and grouting is carried out, the container adapter is in an open state; after the shielding container receives radioactive waste and before grouting, the container adapter is in a closed state. By means of the device, grouting fixing and capping operation can be safely conducted on the radioactive waste receiving container, investment of waste reconditioning production equipment is effectively reduced, radiation protection of workers is achieved, and radioactive hazards to the workers in the waste reconditioning process are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive waste treatment, and in particular to a waste grouting and fixing device and a waste grouting and fixing method. Background Art

[0002] In nuclear power plants, in order to reduce the volume of the final waste package, nuclear facilities usually use 400L or 200L thin-walled steel drums as packaging containers for radioactive waste. Steel drums do not have a shielding effect. Radioactive waste generated by nuclear facilities with a surface dose rate greater than 2mSv / h has high radioactivity, so the collection path and remote automatic operation of the treatment and preparation facilities are usually considered during the design phase to reduce the radiation risk to the workers. This type of radioactive waste usually needs to be processed in a separate room, using remote automatic equipment to transport the steel drums, automatically open and seal the steel drums, and process or prepare the waste. The typical process is the cement curing process line.

[0003] Taking the CPR1000 nuclear power plant as an example, the waste filter elements generated in the N570 hall of the nuclear auxiliary plant are all removed from the filter using a waste filter element replacement device with a shielding function. The replacement device is then lifted by a crane, and the single filter element is released into the steel barrel through a descending channel through remote operation. According to the filter elements of different sizes, filter element brackets are pre-installed in the steel barrel for positioning the filter element. After the steel barrel receives the waste filter element, it is sent to a specific location through a transmission system (such as a roller conveyor) for remote cement grouting operations to seal the waste filter element in the container. For the filters in the remaining rooms, they cannot be replaced by the waste filter element replacement device, such as the shaft seal water injection filter (RCV003FI). The waste filter elements generated by it often need to be replaced manually. After being barreled, it is difficult to send it to the cement curing line for preparation, and there is a certain risk of radiation. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an improved waste grouting and fixing device and a waste grouting and fixing method.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide a waste grouting fixing device, including a shielding container, a container shielding plug for sealing the shielding container, a metal barrel arranged in the shielding container, a barrel cover for sealing the metal barrel, and a container adapter for fitting on the shielding container and being openable and closable;

[0006] When the shielding container receives radioactive waste and is grouting, the container adapter is in an open state;

[0007] After the shielding container receives the radioactive waste and before grouting, the container adapter is in a closed state.

[0008] In some embodiments, the container adapter includes a support for mounting on the top of the shielding container, and a baffle movably fitted on the support;

[0009] The support is provided with a first interface and a second interface connected to each other, the first interface is directly opposite to the shielding container and is connected to the top opening of the shielding container, and the second interface is located on the side of the first interface facing away from the shielding container, and is at least used for the matching positioning of the container shielding plug;

[0010] The baffle can be moved to open and close at the first interface to close or open the top opening of the shielding container.

[0011] In some embodiments, the waste grouting fixing device further comprises a gripping mechanism; the barrel cover is connected to one side of the container shielding plug via the gripping mechanism, and the container shielding plug and the barrel cover are relatively rotatable.

[0012] In some embodiments, the grabbing mechanism includes a grabbing operating rod and a grabbing body connected to a first end portion of the grabbing operating rod;

[0013] The container shielding plug is provided with a first through hole, the grabbing operating rod is penetrated in the first through hole, the grabbing body is located on one side of the container shielding plug, and the second end of the grabbing operating rod is located on the other side of the container shielding plug.

[0014] In some embodiments, the container shielding plug is provided with a second through hole; the second through hole is used for a bolt positioning tool to pass through to fit the bolt on the bolt hole of the barrel cover; the second through hole is also used for a bolt installation tool to pass through to tighten or loosen the bolt.

[0015] In some embodiments, the waste grouting fixing device further comprises a grouting shielding plug, which is used to fit on the top opening of the shielding container during grouting; and a penetrating grouting channel is provided on the grouting shielding plug.

[0016] In some embodiments, the grouting channel includes a grouting pipe that passes through the grouting shielding plug and a quick connector that is connected to the grouting pipe and is located on a surface of the grouting shielding plug that faces away from the shielding container.

[0017] The present invention also provides a waste grouting fixation method, using any of the waste grouting fixation devices described above, the waste grouting fixation method comprises the following steps:

[0018] S1. At the top of the shielding container, the container adapter is opened. After the radioactive waste is loaded into the metal barrel inside the shielding container, the container adapter is closed to close the top of the shielding container.

[0019] S2, connecting the grouting device to the shielding container, and pouring cement into the metal barrel through the grouting device to cover the radioactive waste;

[0020] S3, hoisting the container shielding plug and the barrel cover to the top of the shielding container, opening the container adapter, and installing and fixing the barrel cover and the container shielding plug on the metal barrel and the top of the shielding container respectively.

[0021] In some embodiments, step S2 includes:

[0022] S2.1. Hang the grouting shielding plug onto the container adapter;

[0023] S2.2, opening the baffle of the container adapter, releasing the grouting shielding plug and positioning it on the top of the shielding container;

[0024] S2.3, connecting the grouting device to the grouting channel on the grouting shielding plug to perform cement grouting;

[0025] S2.4. After the grouting is completed, the grouting shielding plug is lifted off the shielding container, and the baffle of the container adapter is moved to close the top of the shielding container.

[0026] In some embodiments, step S3 includes:

[0027] S3.1. After the grabbing mechanism on the container shielding cover grabs the barrel cover, the container shielding cover is hoisted and placed on the top of the container adapter;

[0028] S3.2, opening the baffle of the container adapter, releasing the container shielding cover and positioning it on the top of the shielding container;

[0029] S3.3, using a bolt positioning tool to align the threaded holes or bolts on the barrel cover with the flange holes on the top of the metal barrel, and the gripping mechanism releases the barrel cover onto the metal barrel;

[0030] S3.4. Use a bolt installation tool to tighten the bolts on the barrel cover and the metal barrel.

[0031] The beneficial effects of the present invention are as follows: it is possible to safely perform grouting, fixing and capping operations on containers receiving radioactive waste, effectively solving the problem of using cement grouting, fixing and automatic capping equipment for remote operation on a production line when barrels of radioactive waste with a higher dose rate are difficult to deliver to a room where a dedicated radioactive waste treatment facility (such as a cement solidification production line) is located, effectively reducing the investment in waste preparation production equipment, achieving radiation protection for workers, and reducing the radioactive hazards to workers during the waste preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0033] Figure 1 1 is a schematic diagram of the longitudinal cross-sectional structure of a waste grouting fixing device (the container adapter is in a closed state) according to an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the longitudinal cross-sectional structure of a waste grouting fixing device (the container adapter is in an open state) according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of a waste grouting fixing device container shielding plug located on the top of the shielding container according to an embodiment of the present invention;

[0036] Figure 4 It is a structural schematic diagram of a waste grouting fixing device connected to a grouting device according to an embodiment of the present invention;

[0037] Figure 5 The figure is a schematic flow chart of a waste grouting fixation method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0039] The waste grouting and fixing device of the present invention is mainly used to receive radioactive waste and grout and cover the radioactive waste. The radioactive waste includes various types of high-dose rate radioactive waste filter elements, compressible radioactive waste and other wastes that need to be grouted and fixed.

[0040] like Figure 1-Figure 3 As shown, a waste grouting fixing device according to an embodiment of the present invention may include a shielding container 10 , a metal barrel 20 , a container shielding plug 11 , a barrel cover 21 and a container adapter 30 .

[0041] The metal barrel 20 is loaded in the shielding container 10, and is used to receive the radioactive waste and fix the radioactive waste therein by grouting. The barrel cover 21 is used to be assembled on the metal barrel 20 to close it, and the container shielding plug 11 is used to be assembled on the shielding container 10 to close the shielding container 10. The container adapter 30 is used to be assembled on the top of the container shielding, and the top of the shielding container 10 is opened or closed by itself.

[0042] The shielding container 10 is made of steel, lead or other materials with shielding effect, and is used to load the metal barrel 20 and provide shielding protection to prevent radioactive hazards to personnel and the environment during the process of receiving, grouting and sealing the metal barrel 20.

[0043] The shielding container 10 is a container with an open top, and the container shielding plug 11 is used to fit on the top of the shielding container 10 to close the open top. The container shielding plug 11 is made of steel, lead or other materials with shielding effect, and can be preferably made of the same material as the shielding container 10. The container shielding plug 11 is removed from the top of the shielding container 10, so that the shielding container 10 can be opened or closed.

[0044] In order to position the container shielding plug 11, a concave step 12 is provided on the top of the shielding container 10, and the container shielding plug 11 is seated on the step 12. The convex wall outside the step 12 restricts the container shielding plug 11 on the step and does not separate from the shielding container 10 due to translation.

[0045] The metal barrel 20 is a thin-walled barrel, such as a steel barrel, relative to the shielding container 10. The metal barrel 20 is used to receive radioactive waste, etc., and is a cylinder with an open top. The barrel cover 21 is adapted to the metal barrel 20 and is used to cover the metal barrel 20 to seal the metal barrel 20.

[0046] Compared with the container shielding plug 11, the container adapter 30 is used to temporarily (or transiently) open or close the shielding container 10 after the container shielding plug 11 is separated from the shielding container 10. Including: when the shielding container 10 receives radioactive waste and grouting, the container adapter 30 is in an open state, such as Figure 2 After the shielding container 10 receives the radioactive waste and before grouting, the container adapter 30 is in a closed state to reduce the risk of radiation, such as Figure 1 shown.

[0047] In some embodiments, the container adapter 30 may include a support 31 and a baffle 32. The support 31 is used to be mounted on the top of the shielding container 10 and is arranged along the top of the shielding container 10. The opening of the top of the shielding container 10 forms the opening of the shielding container 10.

[0048] The baffle 32 can be movably fitted on the support 31. By moving back and forth (horizontally) relative to the support 31, the baffle 32 can be fitted to the opening of the shielding container 10 to close the top opening of the shielding container 10, and can also leave the opening to open the top opening of the shielding container 10.

[0049] The movement of the baffle 32 can be achieved by manual pushing and pulling by the staff, or it can be connected to a driving mechanism and controlled by the driving mechanism. The driving mechanism can include a driving body such as a cylinder or a motor.

[0050] Specifically, the support 31 may be provided with a first interface 311 and a second interface 312 connected and communicated with each other, the first interface 311 is directly opposite to the shielding container 10 and communicated with the top opening of the shielding container 10, and the second interface 312 is located on the side of the first interface 311 facing away from the shielding container 10, and is at least used for the matching positioning of the container shielding plug 11. The baffle 32 can be moved to open and close at the first interface 311 to close or open the top opening of the shielding container 10.

[0051] The baffle 32 may be a whole piece, which moves from one side of the support 31 to close in the first interface 311 or open the first interface 311. The baffle 32 may also be provided in two or more pieces, which moves from different directions to close in the first interface 311 or move away from the first interface 311.

[0052] The container adapter 30 may be provided with lifting ears for lifting.

[0053] Furthermore, the waste grouting fixing device of the present invention may also include a gripping mechanism 40; the barrel cover 21 is connected to one side of the container shielding plug 11 through the gripping mechanism 40. Through the gripping mechanism 40, when the container shielding plug 11 is hoisted and assembled, the barrel cover 21 is also hoisted and assembled. The container shielding plug 11 and the barrel cover 21 can rotate relative to each other, so that when the barrel cover 21 is locked, there is no interference from the container shielding plug 11, that is, the container shielding plug 11 can rotate with the barrel cover 21 when the bolts on the barrel cover 21 are locked one by one.

[0054] Alternatively, the grabbing mechanism 40 includes a grabbing operating rod and a grabbing body connected to a first end portion of the grabbing operating rod.

[0055] Corresponding to the grabbing operation rod, the container shielding plug 11 is provided with a first through hole 111, and the first through hole 111 passes through two opposite surfaces of the container shielding plug 11. The grabbing operation rod is inserted in the first through hole 111, and the first end of the grabbing operation rod is located on the side of the container shielding plug 11 facing the shielding container 10, that is, the grabbing body is located on one side of the container shielding plug 11. The opposite second end of the grabbing operation rod is located on the other side of the container shielding plug 11, facing away from the shielding container 10.

[0056] In order to realize the disassembly and assembly of the barrel cover 21 outside the shielding container 10, the container shielding plug 11 may also be provided with a second through hole 112, and the second through hole 112 passes through two opposite surfaces of the container shielding plug 11. The second through hole 112 can be used for a bolt positioning tool to pass through, so that the bolt is matched with the bolt hole of the barrel cover 21, and is also used for a bolt installation tool to pass through, so as to tighten or loosen the bolt.

[0057] Furthermore, if Figure 4As shown, the waste grouting and fixing device of the present invention may also include a grouting shielding plug 50, which is used to fit on the top opening of the shielding container 10 during grouting. The grouting shielding plug 50 is provided with a penetrating grouting channel 51, which is used to connect with the grouting device 100, and cement enters the shielding container 10 through the grouting channel 51 and is filled in the metal barrel 20.

[0058] A liquid level meter 52 or a liquid level measuring point for plugging the liquid level meter may also be provided on the grouting shielding plug 50. The grouting liquid level in the metal barrel 20 is monitored by the liquid level meter 52 to prevent excessive overflow of cement slurry.

[0059] The liquid level meter 52 may be an ultrasonic liquid level meter, an infrared liquid level meter or other forms of liquid level meters.

[0060] In some embodiments, the grouting channel 51 includes a grouting pipe 511 that penetrates the grouting shielding plug 50, and a quick connector 512 that connects the grouting pipe 511 and is located on the surface of the grouting shielding plug 50 facing away from the shielding container 10. The quick connector 512 realizes the quick connection between the grouting channel 51 and the grouting device 100, thereby improving the convenience and efficiency of operation. The grouting device 100 is a movable grouting device, which is convenient for use in multiple occasions with the waste grouting fixture.

[0061] The waste grouting and fixing device of the present invention is used to implement the method of grouting and fixing waste, referring to Figure 5 The waste grouting fixing method implemented by the waste grouting fixing device may include the following steps:

[0062] S1, such as Figure 5 As shown in (1) to (2), the container adapter 30 is pre-assembled to the top of the shielding container 10. At the top of the shielding container 10, the baffle 32 of the container adapter 30 is opened, thereby opening the shielding container 10 and the metal drum 20 to receive the radioactive waste. After the radioactive waste is loaded into the metal drum 20 inside the shielding container 10, the baffle 32 of the container adapter 30 is closed to close the top of the shielding container 10.

[0063] The opening and closing of the baffle 32 can be achieved by manual pushing and pulling by the staff, or can be controlled by a driving mechanism.

[0064] S2, such as Figure 5 As shown in (3), the grouting device 100 is connected to the shielding container 10, and cement is poured into the metal barrel 20 through the grouting device 100 to cover the radioactive waste.

[0065] Specifically, refer to Figure 5 As shown in (2) to (3), step S2 may include the following steps:

[0066] S2.1. When the baffle 32 of the container adapter 30 is in a closed state (the baffle 32 is blocked in the first interface 311 ), the grouting shielding plug 50 is hung on the container adapter 30 , and the grouting shielding plug 50 is fitted in the second interface 312 of the container adapter 30 .

[0067] S2.2, open the baffle 32 of the container adapter 30, release the grouting shielding plug 50 and position it on the top of the shielding container 10. At this time, the grouting shielding plug 50 can be positioned on the step 12 on the top of the shielding container 10.

[0068] S2.3. Connect the grouting device 100 to the grouting channel 51 on the grouting shielding plug 50 to perform cement grouting.

[0069] During the pouring process, the height of the cement inside is detected by the liquid level meter 52 to avoid overflow due to excessive filling.

[0070] S2.4. After the grouting is completed, the grouting shielding plug 50 is lifted off the shielding container 10, and the baffle 32 of the container adapter 30 is moved to close the top of the shielding container 10. Figure 5 As shown in (3) to (4).

[0071] S3, the container shielding plug 11 and the barrel cover 21 are hoisted to the top of the shielding container 10, the container adapter 30 is opened, and the barrel cover 21 and the container shielding plug 11 are respectively installed and fixed on the metal barrel 20 and the top of the shielding container 10, as shown in FIG. Figure 5 As shown in (5) to (6).

[0072] Step S3 may further include:

[0073] S3.1. After the grabbing mechanism 40 on the container shielding plug 11 grabs the barrel cover 21, the container shielding plug 11 is hoisted and placed on the top of the container adapter 30. The container shielding plug 11 can be positioned by fitting in the second interface 312. The barrel cover 21 is smaller than the container shielding plug 11 in terms of the outer circumference, and will not affect the fitting between the container shielding plug 11 and the container adapter 30 or the shielding container 10.

[0074] S3.2. Open the baffle 32 of the container adapter 30 , release the container shielding plug 11 and position it on the top of the shielding container 10 .

[0075] At the top of the shielding container 10 , the container shielding plug 11 is seated on the step 12 at the top of the shielding container 10 for positioning.

[0076] S3.3. Insert the bolt positioning tool 60 into the shielding container 10 through the second through hole 112, and use the bolt positioning tool 60 to align the threaded holes or bolts on the barrel cover 21 with the flange holes on the top of the metal barrel 20 one by one.

[0077] After the centering is completed, the gripping mechanism 40 releases the barrel cover 21 onto the metal barrel 20 .

[0078] The grabbing or releasing operation of the bucket cover 21 by the grabbing mechanism 40 can be performed by operating the second end of the grabbing operating rod.

[0079] S3.4. Pull out the bolt positioning tool 60, insert the bolt installation tool into the shielding container 10 through the second through hole 112, and use the bolt installation tool to lock the bolts on the barrel cover 21 and the metal barrel 20 to lock the barrel cover 21 on the metal barrel 20.

[0080] When tightening the bolts, after the bolt installation tool completes the tightening of one bolt, the bolt installation tool drives the container shielding plug 11 to move along the circumference of the metal barrel 20 to the location of another bolt, and tightens the bolt. After completion, it rotates to tighten the next bolt, thereby tightening all the bolts on the barrel cover 21 one by one.

[0081] In summary, the present invention is applicable to various types of nuclear facilities and to various occasions within nuclear facilities, especially the safe operation of the collection, grouting and sealing of waste barrels of high-dose rate radioactive waste generated at sites that are not equipped with automatic sealing devices or automated waste preparation production lines; it effectively reduces the investment in waste preparation production equipment, realizes radiation protection for workers, and reduces the radioactive hazards to workers during the high-dose rate waste preparation process.

[0082] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A waste grouting fixing device, characterized in that: It comprises a shielding container, a container shielding plug for sealing the shielding container, a metal barrel arranged in the shielding container, a barrel cover for sealing the metal barrel, and a container adapter for fitting on the shielding container and capable of opening and closing; When the shielding container receives radioactive waste and is grouting, the container adapter is in an open state; After the shielding container receives the radioactive waste and before grouting, the container adapter is in a closed state.

2. The waste grouting fixing device according to claim 1, characterized in that: The container adapter includes a support for mounting on the top of the shielding container, and a baffle movably fitted on the support; The support is provided with a first interface and a second interface connected to each other, the first interface is directly opposite to the shielding container and is connected to the top opening of the shielding container, and the second interface is located on the side of the first interface facing away from the shielding container, and is at least used for the matching positioning of the container shielding plug; The baffle can be moved to open and close at the first interface to close or open the top opening of the shielding container.

3. The waste grouting fixing device according to claim 1, characterized in that: The waste grouting fixing device also includes a grabbing mechanism; the barrel cover is connected to one side of the container shielding plug through the grabbing mechanism, and the container shielding plug and the barrel cover can rotate relatively.

4. The waste grouting fixing device according to claim 3, characterized in that: The grabbing mechanism includes a grabbing operating rod and a grabbing body connected to a first end portion of the grabbing operating rod; The container shielding plug is provided with a first through hole, the grabbing operating rod is penetrated in the first through hole, the grabbing body is located on one side of the container shielding plug, and the second end of the grabbing operating rod is located on the other side of the container shielding plug.

5. The waste grouting fixing device according to claim 3, characterized in that: The container shielding plug is provided with a second through hole; the second through hole is used for a bolt positioning tool to pass through so as to fit the bolt on the bolt hole of the barrel cover; the second through hole is also used for a bolt installation tool to pass through so as to tighten or loosen the bolt.

6. The waste grouting and fixing device according to any one of claims 1 to 5, characterized in that: The waste grouting and fixing device also includes a grouting shielding plug, which is used to fit on the top opening of the shielding container during grouting; the grouting shielding plug is provided with a penetrating grouting channel.

7. The waste grouting fixing device according to claim 6, characterized in that: The grouting channel comprises a grouting pipe penetrating the grouting shielding plug and a quick connector connected to the grouting pipe and located on a surface of the grouting shielding plug facing away from the shielding container.

8. A waste grouting fixation method, characterized in that: The waste grouting and fixing device according to any one of claims 1 to 7 is used, and the waste grouting and fixing method comprises the following steps: S1. At the top of the shielding container, the container adapter is opened. After the radioactive waste is loaded into the metal barrel inside the shielding container, the container adapter is closed to close the top of the shielding container. S2, connecting the grouting device to the shielding container, and pouring cement into the metal barrel through the grouting device to cover the radioactive waste; S3, hoisting the container shielding plug and the barrel cover to the top of the shielding container, opening the container adapter, and installing and fixing the barrel cover and the container shielding plug on the metal barrel and the top of the shielding container respectively.

9. The waste grouting fixation method according to claim 8, characterized in that: Step S2 includes: S2.

1. Hang the grouting shielding plug onto the container adapter; S2.2, opening the baffle of the container adapter, releasing the grouting shielding plug and positioning it on the top of the shielding container; S2.3, connecting the grouting device to the grouting channel on the grouting shielding plug to perform cement grouting; S2.

4. After the grouting is completed, the grouting shielding plug is lifted off the shielding container, and the baffle of the container adapter is moved to close the top of the shielding container.

10. The waste grouting fixation method according to claim 8, characterized in that: Step S3 includes: S3.

1. After the grabbing mechanism on the container shielding cover grabs the barrel cover, the container shielding cover is hoisted and placed on the top of the container adapter; S3.2, opening the baffle of the container adapter, releasing the container shielding cover and positioning it on the top of the shielding container; S3.3, using a bolt positioning tool to align the threaded holes or bolts on the barrel cover with the flange holes on the top of the metal barrel, and the gripping mechanism releases the barrel cover onto the metal barrel; S3.

4. Use a bolt installation tool to tighten the bolts on the barrel cover and the metal barrel.

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