High radioactive waste storage and transfer shielding device for nuclear power plant

Abstract

The utility model is applicable to the field of nuclear waste treatment, and discloses a shielding device for high-radioactivity waste storage and transfer of a nuclear power plant, which comprises an outer barrel, a barrel cover, a hinge locking component and an inner barrel, the inner barrel is arranged in the outer barrel, the outer barrel is provided with an outer wall and an inner wall, the inner wall is fit with the inner barrel in shape, a radiation-proof material is filled between the inner wall and the outer wall, the outer wall is provided with a first lifting lug extending outwards, the barrel cover is arranged on the upper portion of the outer barrel, and a second lifting lug is arranged on the barrel cover. After radioactive waste is loaded into the inner barrel and the inner barrel is sealed, the inner barrel is then loaded into the outer barrel, the barrel cover and the outer barrel are locked through the hinge locking assembly, then an operator carries the outer barrel through connection of the first lifting lug and mechanical equipment, and when the barrel cover is opened and closed, the second lifting lug or a lifting appliance on the barrel cover can be selected according to an existing clamp and tool. The whole shielding device is simple in structure, the inner barrel, the outer barrel and the barrel cover are convenient and simple to install and carry, and the radiation time of operators is shortened.

Description

Technical Field

[0001] The utility model relates to the field of nuclear waste treatment, and particularly relates to a shielding device for storing and transporting high-level radioactive waste in a nuclear power plant. Background Art

[0002] The maximum standard value of indoor nuclear radiation dose rate does not exceed 0.5 uSv / h. It is formulated by the International Commission on Radiological Protection (ICRP) that the normal radiation safety value for the human body is that the total dose received per year does not exceed 1 millisievert (mSv), and the maximum is 5 mSv / h under special circumstances.

[0003] During the overhaul of a nuclear power plant, high-level radioactive waste will be generated, such as the waste generated from pool decontamination, foreign objects at the bottom of the reactor pool, filter screens at the bottom of the transfer pool, etc. The surface contact dose rate is as high as several hundred mSv / h. Although it is installed in a shielding device, there is still a relatively high radiation dose on the outer surface. For the existing shielding devices for storing and transporting high-level radioactive waste in a nuclear power plant, due to the different lifting tools of the traveling crane and loading containers in different workshops, it is necessary to replace the traveling crane lifting tool and tooling to hoist and transport the lid of the shielding device; the lid of the shielding device is fastened to the container body by bolts, and such cumbersome work will greatly increase the working time of on-site personnel and the radiation dose of personnel. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a shielding device for storing and transporting high-level radioactive waste in a nuclear power plant, aiming to solve the problem in the prior art that it is necessary to frequently replace the lifting tools and the container body.

[0005] The technical solution adopted by the utility model to solve its technical problem includes: an outer barrel, a barrel lid, a hinged locking assembly and an inner barrel; the inner barrel is arranged in the outer barrel, the outer barrel is provided with an outer wall and an inner wall, the shape of the inner wall fits the shape of the inner barrel, a radiation-proof material is filled between the inner wall and the outer wall, the outer wall is provided with a first lifting lug extending outwards, the barrel lid is arranged on the upper part of the outer barrel, the barrel lid is provided with a second lifting lug, and the inside of the barrel lid is filled with a radiation-proof material. The hinged locking assembly respectively connects and locks the outer barrel and the barrel lid.

[0006] In one embodiment, an elastic guide plate is further arranged at the inner wall, the diameter of the upper opening of the elastic guide plate is larger than the outer diameter of the inner barrel, and the inner diameters of the middle and lower parts of the elastic guide plate are less than or equal to the outer diameter of the inner barrel.

[0007] In one embodiment, there are several elastic guide plates, and the elastic guide plates are evenly distributed with the inner wall as the center.

[0008] In one embodiment, a lifting device is further provided on the upper part of the bucket cover. The lifting device is in the shape of a boss, with a hollow center, and is fixed to the bucket cover by bolts.

[0009] In one embodiment, the articulated locking assembly is a buckle structure, which includes a hook and a handle seat. The hook is fixed to the bucket cover, and the handle seat is fixed to the outer wall, or: the hook is fixed to the outer wall, and the handle seat is fixed to the bucket cover.

[0010] In one embodiment, a positioning pin is further provided on the upper part of the outer bucket, and an avoidance groove is provided on the bucket cover. The position and shape of the positioning pin match those of the avoidance groove.

[0011] In one embodiment, a supporting part protruding outward is provided at the bottom of the outer bucket, and the diameter of the supporting part is smaller than that of the outer bucket.

[0012] In one embodiment, there are several first lifting lugs, which are evenly distributed circumferentially on the outer wall.

[0013] In one embodiment, there are several second lifting lugs, which are evenly distributed circumferentially on the bucket cover.

[0014] In one embodiment, a clamping groove is provided at the outer wall, and an identification card is provided in the clamping groove.

[0015] Implementing the present utility model has the following beneficial effects: After the radioactive waste is loaded into the inner bucket and the inner bucket is sealed, the inner bucket is then loaded into the outer bucket. The bucket cover and the outer bucket are locked through the articulated locking assembly. The outer bucket and the bucket cover are filled with radiation-proof materials to block the radiation of the radioactive waste. Then, the operator links the first lifting lug with mechanical equipment to carry the outer bucket. When opening and closing the bucket cover, the second lifting lug or the lifting device on the bucket cover can be selected according to the existing fixtures and tooling. The entire shielding device has a simple structure, and the installation and handling of the inner bucket, outer bucket, and bucket cover are convenient and simple, reducing the time for the operator to be irradiated by radiation and ensuring the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the present utility model, the present utility model will be further described below in conjunction with the drawings and embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0017] Figure 1 is a front view of a shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to an embodiment of the present utility model;

[0018] Figure 2 It is a sectional view of a shielding device for storing and transporting high - level radioactive waste in a nuclear power plant in an embodiment of the present utility model;

[0019] Figure 3 It is a three - dimensional view of a shielding device for storing and transporting high - level radioactive waste in a nuclear power plant in an embodiment of the present utility model;

[0020] Figure 4 It is a top view of a shielding device for storing and transporting high - level radioactive waste in a nuclear power plant in an embodiment of the present utility model;

[0021] Figure 5 It is a structural diagram of a buckle of a shielding device for storing and transporting high - level radioactive waste in a nuclear power plant in an embodiment of the present utility model.

[0022] Reference Signs in the Drawings

[0023] 1. Outer barrel; 2. Barrel cover; 3. First lifting lug; 4. Second lifting lug; 5. Buckle; 6. Positioning pin; 7. Hoisting tool; 8. Card slot; 9. Supporting part; 10. Elastic guide plate; 11. Avoidance groove; 12. Inner barrel; 13. Hook; 14. Handle seat; 15. Fixed part; 16. Ring - shaped positioning groove. Specific embodiments

[0024] For a clearer understanding of the technical features, purposes, and effects of the present utility model, the specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientation or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings, and are specific orientations for the structure and operation, only for the convenience of describing the technical solution, rather than indicating that the indicated device or element must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0025] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", "linkage", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. When a component is referred to as "on" or "under" another component, the component can be "directly" or "indirectly" located above the other component, or there may also be one or more intermediate components. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", etc. can explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Figures 1 to 3 Fig. shows a shielding device for storing and transporting high-level radioactive waste in a nuclear power plant in an embodiment of the present utility model. The shielding device for storing and transporting high-level radioactive waste in a nuclear power plant can be used for storing and transporting radioactive waste, and it may include an outer barrel 1, a barrel cover 2, a hinge locking assembly, and an inner barrel 12; the inner barrel 12 is arranged in the outer barrel 1. The outer barrel 1 is provided with an outer wall and an inner wall, the shape of the inner wall fits the shape of the inner barrel 12, and a radiation-proof material is filled between the inner wall and the outer wall. The outer wall is provided with a first lifting lug 3 extending outward. The barrel cover 2 is arranged on the upper part of the outer barrel 1, and a second lifting lug 4 is arranged on the barrel cover 2. The inside of the barrel cover 2 is filled with a radiation-proof material. The hinge locking assembly respectively connects and locks the outer barrel 1 and the barrel cover 2. After the radioactive waste is loaded into the inner barrel 12 and the inner barrel 12 is sealed, the inner barrel 12 is then loaded into the outer barrel 1, and the barrel cover 2 and the outer barrel 1 are locked through the hinge locking assembly. The radiation of the radioactive waste can be blocked by the radiation-proof materials filled in the outer barrel 1 and the barrel cover 2. Then, the operator links the first lifting lug 3 with mechanical equipment to carry the outer barrel 1. When opening and closing the barrel cover 2, the second lifting lug 4 or the lifting tool 7 on the barrel cover can be selected according to the existing fixtures and tooling. The whole shielding device has a simple structure, and the installation and handling of the inner barrel 12, the outer barrel 1, and the barrel cover 2 are convenient and simple, reducing the time for the operator to be irradiated by radiation and ensuring the personal safety of the operator. It can be understood that both loading the radioactive waste into the inner barrel 12 and loading the inner barrel 12 into the outer barrel 1 are operated by the operator through mechanical equipment.

[0027] In a specific embodiment, the upper part of the outer barrel 1 is provided with an annular positioning groove 16, and the bottom of the barrel cover 2 is provided with a fixing part 15 that matches the shape of the annular positioning groove 16. The fixing part 15 is loaded in the annular positioning groove 16, so that the barrel cover 2 and the outer barrel 1 will not move relatively, ensuring the firm sealing of the barrel cover 2 and the outer barrel 1.

[0028] In a specific embodiment, the outer dimensions of the first lifting lug 3 and the second lifting lug 4 are different and are designed according to the equipment to be actually transported.

[0029] In a specific embodiment, the first lifting lug 3 is connected to the outer barrel 1 by fixing means such as welding. One end of the second lifting lug 4 has a threaded structure, and corresponding threaded holes are provided on the barrel cover 2 for mating and fixing. The weight borne by the first lifting lug 3 is greater than the weight borne by the second lifting lug 4.

[0030] Figure 2 It is shown that in one embodiment, the inner wall may include an elastic guide plate 10. The upper opening diameter of the elastic guide plate 10 is larger than the outer diameter of the inner barrel 12, and the inner diameters of the middle and lower parts of the elastic guide plate 10 are less than or equal to the outer diameter of the inner barrel 12. The opening being larger than the outer diameter of the inner barrel 12 is conducive to the insertion of the inner barrel 12 and plays a guiding role. The middle and lower parts being smaller than the outer diameter of the inner barrel 12 is conducive to clamping the inner barrel 12 and restricting the movement of the inner barrel 12, avoiding the radioactive waste spilling out of the inner barrel 12 due to collision during transportation and causing trouble in subsequent cleaning of the outer barrel 1.

[0031] In one embodiment, the elastic guide plate 10 may include a plurality of elastic guide plates 10. The elastic guide plates 10 are evenly distributed with the inner wall as the center, so that the inner barrel 12 is located at the center of the outer barrel 1, which is easy to ensure that the inner barrel 12 is in the center of gravity position and will not tilt during hoisting preloading.

[0032] Figures 1 to 4 It is shown that in one embodiment, the barrel cover 2 may include a lifting tool 7 on the upper part. The lifting tool 7 is in the shape of a boss, the center of the lifting tool 7 is hollowed out, and the lifting tool 7 is fixed to the barrel cover 2 by bolts. The lifting tool 7 is used to adapt to the internally opened fixture for facilitating the transfer between different equipment.

[0033] Figure 5 It is shown that in one embodiment, the hinged locking assembly may include. The lock buckle 5 structure includes a hook 13 and a handle seat 14. The hook 13 is fixed to the barrel cover 2, and the handle seat 14 is fixed to the outer wall, or: the hook 13 is fixed to the outer wall, and the handle seat 14 is fixed to the barrel cover 2. The lock buckle 5 structure is convenient for fixing and unlocking, and has a simple structure and low operation difficulty, and it is easy to use a manipulator to achieve the action.

[0034] Figures 1 to 3 It is shown that in one embodiment, the outer barrel 1 and the barrel cover 2 may include. A positioning pin 6 is further provided on the upper part of the outer barrel 1, and an avoidance groove 11 is provided on the barrel cover 2. The position and shape of the positioning pin 6 match those of the avoidance groove 11. The cooperation between the positioning pin 6 and the avoidance groove 11 is mainly used to axially fix the barrel cover 2 and the outer barrel 1, so that the barrel cover 2 will not rotate axially.

[0035] In one embodiment, the outer barrel 1 may include a support portion 9 protruding outwardly at the bottom of the outer barrel 1. The diameter of the support portion 9 is smaller than the diameter of the outer barrel 1. The support portion 9 provides an insertion space at the bottom of the outer barrel 1. When the outer barrel 1 is placed on a flat surface, an operator can support the outer barrel 1 from the space outside the support portion 9, avoiding direct clamping of the outer barrel.

[0036] In one embodiment, the first lifting lugs 3 may include a plurality of first lifting lugs 3. The first lifting lugs 3 are circumferentially distributed on the outer wall. The plurality of evenly distributed first lifting lugs 3 can facilitate an operator to find the center of gravity of the outer barrel 1 and ensure that the outer barrel 1 does not tilt during hoisting.

[0037] In one embodiment, the second lifting lugs 4 may include a plurality of second lifting lugs 4. The second lifting lugs 4 are circumferentially distributed on the barrel cover 2.

[0038] In one embodiment, the outer barrel 1 may include a card slot 8 provided on the outer wall. An identification card is provided in the card slot 8. The presence of the identification card can enable an operator and other personnel to understand the type of radioactive waste loaded in the barrel and avoid misoperation.

[0039] It can be understood that the above embodiments only represent the preferred embodiments of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A shielding device for storing and transporting high - level radioactive waste in a nuclear power plant, characterized in that, Including: An outer barrel (1), a barrel cover (2), a hinge locking assembly, and an inner barrel (12); The inner barrel (12) is arranged in the outer barrel (1). The outer barrel (1) is provided with an outer wall and an inner wall. The shape of the inner wall fits the shape of the inner barrel (12). A radiation-proof material is filled between the inner wall and the outer wall. The outer wall is provided with a first lifting lug (3) extending outward. The barrel cover (2) is arranged on the upper part of the outer barrel (1). The barrel cover (2) is provided with a second lifting lug (4). The inside of the barrel cover (2) is filled with a radiation-proof material. The hinge locking assembly respectively connects and locks the outer barrel (1) and the barrel cover (2).

2. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that An elastic guide plate (10) is further arranged at the inner wall. The diameter of the upper opening of the elastic guide plate (10) is larger than the outer diameter of the inner barrel (12). The inner diameters of the middle and lower parts of the elastic guide plate (10) are less than or equal to the outer diameter of the inner barrel (12).

3. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 2, wherein, There are several elastic guide plates (10), and the elastic guide plates (10) are evenly distributed around the inner wall as the center.

4. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, A lifting tool (7) is further arranged on the upper part of the barrel cover (2). The lifting tool (7) is in the shape of a convex platform. The center of the lifting tool (7) is hollowed out. The lifting tool (7) is fixed on the barrel cover (2) by bolts.

5. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, The hinge locking assembly is a lock catch (5) structure. The lock catch (5) structure includes a hook (13) and a handle seat (14). The hook (13) is fixed on the barrel cover (2), and the handle seat (14) is fixed on the outer wall, or: The hook (13) is fixed on the outer wall, and the handle seat (14) is fixed on the barrel cover (2).

6. The shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, A positioning pin (6) is further arranged on the upper part of the outer barrel (1). The barrel cover (2) is provided with an avoidance groove (11). The position and shape of the positioning pin (6) match those of the avoidance groove (11).

7. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, A supporting part (9) protruding outward is arranged at the bottom of the outer barrel (1). The diameter of the supporting part (9) is smaller than the diameter of the outer barrel (1).

8. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, There are several first lifting lugs (3), and the first lifting lugs (3) are evenly distributed around the circumference of the outer wall.

9. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, There are several second lifting lugs (4), and the second lifting lugs (4) are evenly distributed around the circumference of the barrel cover (2).

10. A shielding device for storing and transporting high-level radioactive waste in a nuclear power plant according to claim 1, characterized in that, A clamping groove (8) is arranged at the outer wall, and an identification card is arranged in the clamping groove (8).

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