Packaging device and packaging method for radioactive material

Abstract

The embodiments of the present application provide a packaging device and packaging method for radioactive materials. The packaging device includes: an inner container and an outer container. The inner container includes an inner container body and an inner container cover, the inner container body having a first opening facing downward, the inner container body defining an inner receiving cavity communicating with the first opening for receiving radioactive materials, the inner container cover being detachably connected to the inner container body for sealing the first opening. The outer container includes an outer container body and an outer container cover, the outer container body having a second opening facing upward, the outer container body defining an outer receiving cavity communicating with the second opening for receiving the inner container, the outer container cover being detachably connected to the outer container body for sealing the second opening, wherein a first lifting assembly is provided on the upper portion of the inner container body for lifting the inner container into or out of the outer receiving cavity via the second opening, wherein when the inner container body is lifted, the inner container body can remain in a state with the first opening facing downward.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of radioactive material storage, and specifically to a packaging device and a packaging method for radioactive material. Background Art

[0002] Radioactive materials are typically stored in packaging containers. These containers can age over time and even become damaged. Direct handling or transportation of these containers can result in leakage of radioactive materials, posing a significant safety hazard. Given the unique characteristics of radioactive materials, existing packaging containers are insufficient for secondary packaging, necessitating the development of new packaging devices. Summary of the Invention

[0003] In view of the above problems, the present application is proposed to provide a packaging device and a packaging method for radioactive materials that overcome the above problems or at least partially solve the above problems.

[0004] According to a first aspect of an embodiment of the present application, there is provided a device for packaging radioactive material, comprising:

[0005] an inner container comprising an inner container body and an inner container cover, wherein the inner container body has a first opening facing downward, the inner container body defines an inner receiving cavity communicating with the first opening for receiving radioactive material, and the inner container cover is detachably connected to the inner container body for sealing the first opening; and

[0006] The outer container comprises an outer container body and an outer container cover, wherein the outer container body has an upward second opening, the outer container body defines an outer accommodating cavity communicating with the second opening for accommodating the inner container, and the outer container cover is detachably connected to the outer container body for sealing the second opening.

[0007] A first hoisting assembly is provided on the upper portion of the inner container body for hoisting the inner container into or out of the outer accommodating cavity through the second opening, and when the inner container body is hoisted, the inner container body can be kept in a state with the first opening facing downward.

[0008] According to a second aspect of the embodiments of the present application, a method for packaging a radioactive material is provided. The method uses the device described in the first aspect of the embodiments of the present application to package the radioactive material. The method includes:

[0009] The inner container body is suspended by a first suspension assembly to cover the inner container body outside the radioactive material;

[0010] Providing a turning device with a supporting plate, extending the supporting plate of the turning device into the bottom of the inner container body to cover the first opening of the inner container body, and using the turning device to turn the inner container body 180 degrees so that the first opening faces upward;

[0011] Installing the inner container cover on the inner container body;

[0012] Using the turning device to turn the inner container 180 degrees so that the inner container cover faces downward;

[0013] The inner container body is hoisted by a first hoisting assembly, and the inner container is placed in the inner receiving cavity of the outer container through the second opening, and the outer container cover is installed on the outer container body.

[0014] The packaging device for radioactive materials provided in an embodiment of the present application comprises an inner container and an outer container, wherein the inner container body can be maintained in a state with the first opening facing downward by hoisting, so that it can be covered on the outside of a damaged packaging container of the radioactive material. The inner container cover is installed by flipping the inner container once, and restored to the state with the first opening facing downward by flipping it a second time, and then hoisted and placed in the outer container to achieve secondary packaging of the radioactive material.

[0015] Compared with the design using a single container, the embodiment of the present application adopts a combined design of an inner container and an outer container, which can ensure that the weight of the inner container is greatly reduced under the same shielding effect, thereby facilitating the lifting and flipping operations of the inner container and improving the installation of secondary packaging of damaged containers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention.

[0017] Figure 1 is an axial cross-sectional view of a packaging device according to an embodiment of the present invention;

[0018] Figure 2 is an axial cross-sectional view of an inner container according to an embodiment of the present invention;

[0019] Figure 3 is a top view of the upper end plate of the inner barrel according to an embodiment of the present invention; and

[0020] Figure 4 Schematic diagram of the process of packaging radioactive materials using the packaging device according to an embodiment of the present invention.

[0021] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0022] Description of reference numerals:

[0023] 1. Inner container;

[0024] 11. Inner barrel body; 111. First flange; 112. Second flange; 113. First rib;

[0025] 12. Upper end plate of inner barrel; 121. Notch;

[0026] 13. Inner container cover;

[0027] 14. First hoisting assembly; 141. First hoisting portion; 142. Second hoisting portion;

[0028] 2. Outer container;

[0029] 21. Outer barrel body; 211. Third flange; 2111. Vertical annular portion; 2112. Horizontal annular portion; 212. Second rib;

[0030] 22. Lower end plate of outer barrel; 221. Gasket;

[0031] 23. Outer container cover; 231. Sealing gasket;

[0032] 24, second hoisting assembly; 241, third hoisting unit; 242, fourth hoisting unit;

[0033] 25. Guide plate; 251. Base; 252. Wedge-shaped portion;

[0034] 26. Cover plate; 261. Fifth hoisting unit;

[0035] 3. Radioactive substances. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of this application. Obviously, the described embodiment is only one embodiment of this application, not all embodiments. Based on the described embodiments of this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. If the full text involves descriptions such as "first" and "second", the "first" and "second" descriptions are only used to distinguish similar objects, and cannot be understood as indicating or implying their relative importance, order of precedence, or implicitly indicating the number of technical features indicated. It should be understood that the data described by "first" and "second" can be interchangeable under appropriate circumstances. If "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes Solution A, Solution B, or solutions that meet both A and B.

[0038] In the description of the embodiments of the present invention, “a plurality of” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] The present application provides a packaging device for radioactive material. It should be noted that, in the present application, the packaged radioactive material can be the radioactive material itself or a packaging container containing the radioactive material. The packaging container containing the radioactive material may be aged or damaged.

[0040] See also Figure 1 The packaging device of the embodiment of the present invention includes an inner container 1 and an outer container 2. The inner container 1 is used to contain a radioactive substance 3, and the outer container 2 is used to contain the inner container 1.

[0041] The inner container 1 includes an inner container body and an inner container cover 13. The inner container body has a first opening facing downward. The inner container body defines an inner receiving cavity for accommodating radioactive material, which is connected to the first opening. The inner container cover 13 is detachably connected to the inner container body and is used to seal the first opening.

[0042] The outer container 2 includes an outer container body and an outer container cover 23. The outer container body has an upwardly facing second opening, and defines an outer accommodating cavity communicating with the second opening for accommodating the inner container 1. The outer container cover 23 is detachably connected to the outer container body for sealing the second opening.

[0043] The upper portion of the inner container body is provided with a first hoisting assembly 14 for hoisting the inner container 1 into or out of the outer accommodating cavity through the second opening. When the inner container body is hoisted, the inner container body can be kept in a state with the first opening facing downward.

[0044] In the packaging device provided in the embodiment of the present application, since the first lifting assembly 14 is provided on the upper part of the inner container body, the inner container body can be kept in a state where the first opening is facing downward by lifting, so that it can be covered on the outside of a damaged packaging container of a radioactive material. The inner container cover 13 of the inner container 1 is installed by flipping it once, and the state where the first opening is facing downward is restored by flipping it a second time, and then it is lifted and placed in the outer container 2, thereby realizing the secondary packaging of the radioactive material, and further realizing the secondary loading and transportation of the radioactive material.

[0045] In this embodiment of the present application, the inner container 1 can primarily serve as packaging, while the outer container 2 can primarily serve as radiation shielding. Compared to a single-container design, the combined design of the inner container 1 and outer container 2 in this embodiment of the present application can significantly reduce the weight of the inner container 1 while maintaining the same shielding effect. This facilitates the lifting and flipping of the inner container 1, and improves the ease of secondary packaging of damaged containers.

[0046] The structures of the inner container 1 and the outer container 2 of the embodiment of the present application can meet the requirements of sealing and shielding, ensure the safety of radioactive materials during disposal and transportation, and reduce the cumulative exposure dose of operators.

[0047] In some embodiments, the weight of the inner container 1 can be set to be smaller than the weight of the outer container 2. In some embodiments, the radiation shielding capability of the inner container 1 can be set to be smaller than the radiation shielding capability of the outer container 2.

[0048] In some embodiments, the weight of the inner container 1 is less than the weight of the outer container 2, and the radiation shielding capability of the inner container 1 is less than or weaker than the radiation shielding capability of the outer container 2. For example, when the inner container 1 and the outer container 2 are made of the same material, the wall thickness of the inner container 1 can be set to be less than the wall thickness of the outer container 2, so that the weight of the inner container 1 is less than the weight of the outer container 2, and the radiation shielding capability of the inner container 1 is less than or weaker than the radiation shielding capability of the outer container 2.

[0049] In some embodiments, the inner container cover 13 may have a buckle structure so as to be quickly assembled and disassembled from the inner container body.

[0050] See also Figure 1 and Figure 2 The inner container body includes: an inner barrel body 11, a first flange 111 and an inner barrel upper end plate 12.

[0051] The inner barrel body 11 has upper and lower openings. A first flange 111 is connected to the top of the inner barrel body 11. An inner barrel upper end plate 12 is fixedly connected to the first flange 111 and serves to seal the upper opening of the inner barrel body 11. The inner barrel body 11, the first flange 111, and the inner barrel upper end plate 12 collectively define an inner receiving chamber, with the lower opening of the inner barrel body 11 forming its first opening. An inner container cover 13 is removably connected to the bottom of the inner barrel body 11.

[0052] The first hanging assembly 14 may include: a plurality of first hanging portions 141 and / or at least one second hanging portion 142. The plurality of first hanging portions 141 are disposed on the first flange 111 at intervals along the circumferential direction.

[0053] The first lifting portion 141 and the second lifting portion 142 may be lifting rings. The number of first lifting portions 141 may be three, four, or five, and these first lifting portions 141 may be evenly distributed on the first flange 111. The number of second lifting portion 142 may be one, located in the middle of the inner container cover 13. This arrangement helps maintain the stability of the inner container 1 when the first and second lifting portions 141, 142 are simultaneously passed through.

[0054] See also Figure 3 The upper end plate 12 of the inner barrel is provided with a plurality of notches 121 that allow the first lifting portion 141 to extend upward. At least one second lifting portion 142 is provided on the upper end plate 12 of the inner barrel. This arrangement helps ensure that the inner container body can be stably maintained in the downward-facing position with the first opening when the inner container 1 is lifted.

[0055] See also Figure 2 The inner container body further includes a second flange 112 connected to the bottom of the inner barrel body 11. The second flange 112 defines a first opening. The inner container cover 13 is detachably connected to the second flange 112.

[0056] The inner container body further includes a plurality of first ribs 113. The plurality of first ribs 113 can be provided on the upper portion of the inner barrel body 11 for connecting the first flange 111 and the inner barrel body 11 to enhance the structural strength of the inner barrel body 11.

[0057] A plurality of first ribs 113 may also be provided at the lower portion of the inner barrel body 11 for connecting the second flange 112 and the inner barrel body 11. Alternatively, a portion of the first ribs 113 connects the first flange 111 and the inner barrel body 11, and another portion of the first ribs 113 connects the second flange 112 and the inner barrel body 11.

[0058] See also Figure 1The outer container body includes: an outer barrel body 21, an outer barrel lower end plate 22, and a third flange 211. The outer barrel body 21 has upper and lower openings. The outer barrel lower end plate 22 is fixedly connected to the bottom of the outer barrel body 21 to close the lower opening of the outer barrel body 21.

[0059] The third flange 211 is connected to the top of the outer barrel body 21. The outer barrel body 21, the third flange 211 and the outer barrel lower end plate 22 together define an outer accommodating cavity, the third flange 211 defines a second opening, and the outer container cover 23 is detachably connected to the third flange 211.

[0060] In some embodiments, the outer container body may further include: a plurality of guide plates 25 radially arranged on the lower end plate 22 of the outer barrel, each guide plate 25 being connected to the inner wall of the outer barrel body 21 and extending upward along the inner wall of the outer barrel body 21. The guide plates 25 are used to guide the inner container 1 to be placed centrally inside the outer container 2.

[0061] By providing the guide plate 25, after the inner container 1 is hoisted into the outer accommodating cavity through the second opening, the guide plate 25 can provide radial guidance for the inner container 1 to prevent the inner container 1 from shaking in the outer accommodating cavity and colliding with the outer container 2, thereby causing damage to the inner container 1 and / or the outer container 2.

[0062] In some embodiments, the guide plate 25 includes a base 251 and a wedge-shaped portion 252. The base 251 extends upward from the lower end plate 22 of the outer barrel along the outer barrel body 21. The wedge-shaped portion 252 extends upward from the base 251 along the outer barrel body 21. The wedge-shaped portion 252 is used to guide the inner container 1 to descend steadily into the outer container 2. The base 251 provides radial support for the inner container 1 to prevent it from shaking within the outer container 2. The base 251 can be rectangular.

[0063] The outer container body may further include a second lifting assembly 24, which is provided on the third flange 211 and / or the outer container cover 23. The second lifting assembly 24 can be used to achieve the overall lifting of the packaging device.

[0064] In some embodiments, the second lifting assembly 24 includes a plurality of third lifting portions 241 and a plurality of fourth lifting portions 242. The third lifting portions 241 are provided on the third flange 211 to facilitate lifting the outer barrel body 21. The fourth lifting portions 242 are provided on the outer container cover 23 to facilitate lifting the outer container cover 23.

[0065] In some embodiments, a second rib 212 is provided on the lower side of the third flange 211 to abut against the outer wall of the outer barrel body 21 to enhance the structural strength of the outer barrel body 21 .

[0066] In some embodiments, the third flange 211 includes a horizontal annular portion 2112 extending radially and a vertical annular portion 2111 extending upward from an outer edge of the horizontal annular portion 2112. The outer container cover 23 is detachably connected to an end surface of the vertical annular portion 2111.

[0067] The outer container 2 further includes a cover plate 26, which is detachably connected to the horizontal annular portion 2112. By configuring the third flange 211 to be stepped with a horizontal annular portion 2112 and a vertical annular portion 2111, the outer container 2 has two upper covers, thereby enhancing the sealing and radiation shielding effect of the outer container 2.

[0068] At least one fifth lifting portion 261 is provided on the cover plate 26 , so that the second opening of the outer container body can be opened by lifting and removing the outer container cover 23 and the cover plate 26 in sequence.

[0069] In some embodiments, a plurality of fifth lifting portions 261 are provided on the cover plate 26 to facilitate lifting of the cover plate 26 .

[0070] In some embodiments, see Figure 1 Sealing gaskets 231 are respectively provided at the abutting position between the outer container cover 23 and the vertical annular portion 2111 of the third flange 211, and at the abutting position between the cover plate 26 and the horizontal annular portion 2112 of the third flange 211. Due to the use of double-layer sealing gaskets 231, the sealing performance is improved, ensuring that the shielding and sealing requirements are met after secondary packaging.

[0071] In some exemplary embodiments, see Figure 1 The lower end plate 22 of the outer barrel is installed with a gasket 221 so that the lower end plate 22 of the outer barrel is off the ground.

[0072] In some embodiments, the main body material of the outer container cover 23 is the same as the material of the outer barrel body 21 , and the thickness of the outer container cover 23 is the same as the thickness of the outer barrel body 21 .

[0073] In some embodiments, the outer container cover 23 is designed according to a level 3 leakage standard, with a leakage rate of ≤0.01 per hour, meeting the sealing requirements of the secondary packaging.

[0074] In some embodiments, the outer surface and / or inner surface of at least one of the inner barrel body 11, the inner barrel upper end plate 12 and the inner container cover 13 is provided with a radiation-resistant shielding layer to shield the radioactive material placed in the inner container 1 from radiating to the outside through the inner container 1 and the outer container 2.

[0075] In some embodiments, the outer surface and / or inner surface of the outer barrel body 21, the outer barrel lower end plate 22 and the outer container cover 23 are provided with a radiation-resistant shielding layer to shield the radioactive material placed inside the inner container 1.

[0076] In addition to meeting the sealing and shielding requirements, the packaging device of the embodiment of the present application should also meet the structural and corrosion requirements.

[0077] The embodiment of the present application also provides a method for packaging radioactive materials, which uses the packaging device of the embodiment of the present application to package radioactive materials.

[0078] The packaging method of the embodiment of the present application includes steps S1 to S5.

[0079] S1. Use the first lifting assembly 14 to lift the inner container body and place the inner container body cover outside the radioactive material 3.

[0080] S2. Provide a flipping device with a supporting plate, extend the supporting plate of the flipping device into the bottom of the inner container body to cover the first opening of the inner container body, and use the flipping device to flip the inner container body 180° so that the first opening faces upward.

[0081] S3. Install the inner container cover 13 on the inner container body.

[0082] S4. Use the turning device to turn the inner container 1 180 degrees so that the inner container cover 13 faces downward.

[0083] S5. Hang the inner container 1 by the first hanging assembly 14, place the inner container 1 in the outer accommodating cavity of the outer container 2 through the second opening, and install the outer container cover 23 on the outer container body.

[0084] In the embodiment of the present application, the inner container body is hoisted and the inner container body cover is placed on the outside of the radioactive material 3, and the inner container body is flipped by using a flipping device so that the radioactive material 3 is loaded into the inner container body. Then, the inner container cover 13 is installed to repackage the radioactive material 3. Then, the inner container body is flipped a second time by using a flipping device, and then hoisted and placed in the outer container 2 to achieve packaging and shielding of the radioactive material 3.

[0085] The following combination Figure 4 The packaging method of the present application is described in detail.

[0086] As shown in Figure a, radioactive material 3 is placed on the ground. With the inner barrel's upper end plate 12 positioned above the inner barrel's body 11, the inner container's first lifting assembly 14 can be hoisted using a crane or other means. The inner container can then be moved directly above the radioactive material 3. The inner container can then be lowered to cover the outer surface of the radioactive material 3 (see Figure b). The support plate of a tilting device (not shown) is extended into the bottom of the inner container to cover the inner container's first opening and support the radioactive material 3. The tilting device is then used to flip the inner container 180°, positioning the inner barrel's upper end plate 12 at the bottom of the inner barrel's body 11, with the first opening facing upward. (See Figure c). The inner container lid 13 is lifted and moved directly above the inner container's first opening. The lid 13 is then lowered to close the first opening and integrally attached to the inner container (see Figure d). The tilting device is then used to flip the inner container 1 another 180°, positioning the inner barrel's upper end plate 12 at the top of the inner barrel's body 11 (see Figure e). Lift inner container 1 to directly above the second opening of outer container 2, then lower inner container 1 to enter the interior of outer container 2 (see Figure f). Lift outer container lid 23 to directly above the second opening of outer container 2, then lower outer container lid 23 to close the second opening, and integrally attach outer container lid 23 to the outer container body (see Figure g).

[0087] In some embodiments, after the outer container cover 23 is integrated with the outer container body, the method further includes steps S6 to S7.

[0088] S6. Measure the α and β ray doses on the outer surface of the outer container 2.

[0089] S7. When the α and β ray doses are greater than or equal to the preset values, the outer surface of the outer container 2 is wiped.

[0090] Specifically, in step S6, an α-β radiation detector can be used to measure the surface contamination dose of outer container 2. When the surface contamination dose of outer container 2 is less than a preset value, the surface of outer container 2 is uncontaminated. If the surface contamination dose of outer container 2 is greater than or equal to the preset value, the surface of outer container 2 is wiped and the surface contamination dose of outer container 2 is remeasured using the α-β radiation detector until the surface contamination dose of outer container 2 is less than the preset value. This method can effectively reduce surface contamination of outer container 2 and mitigate the adverse effects of radioactive material 3 on personnel and the environment.

[0091] In some embodiments, after the outer container cover 23 is installed integrally with the outer container body, the method further includes steps S8 to S9.

[0092] S8. Measure the gamma ray dose rate near the outer container 2.

[0093] S9. When the gamma ray dose rate near the outer container 2 is greater than or equal to a preset value, a shielding layer is coated on the outer surface of the outer container 2.

[0094] Specifically, a gamma-ray dosimeter can be used to measure the gamma-ray dose rate near the outer container 2. When the gamma-ray dose rate near the outer container 2 is less than a preset value, the shielding effect of the outer container 2 meets the requirements. When the gamma-ray dose rate near the outer container 2 is greater than or equal to the preset value, a shielding layer is further applied to the outer surface of the outer container 2, and the gamma-ray dose rate near the outer container 2 is remeasured using a gamma-ray dosimeter until the gamma-ray dose rate near the outer container 2 is less than the preset value.

[0095] Through the above method, when the shielding effect of the outer container 2 and the inner container 1 on the radioactive material 3 cannot reach the preset standard, that is, when the gamma-ray dose rate near the outer container 2 is greater than or equal to the preset value, a shielding layer is further wrapped on the outer surface of the outer container 2, and the gamma-ray dose rate near the outer container 2 is re-measured using a gamma-ray dosimeter until the gamma-ray dose rate near the outer container 2 is less than the preset value, so as to ensure that the radiation amount radiated to the outside by the packaging device containing the radioactive material 3 is within the permitted standard range.

[0096] It is easy to understand that there is no order between step S6 and step S8 , and step S9 is performed after step S7 to avoid affecting the wiping of the outer surface of the outer container 2 .

[0097] In some embodiments, when the radioactive material 3 includes a packaging container, before step S1, the packaging method of the embodiment of the present application further includes: S0, inspecting the packaging container of the radioactive material 3 to determine whether the packaging container is damaged.

[0098] After determining that the packaging container is damaged in step S0, steps S1 to S5 are executed. After determining that the packaging container is not damaged in step S0, the radioactive material 3 can be hoisted into another transfer container without using the packaging device of the present application for secondary packaging.

[0099] In addition, to prevent accidental spillage of radioactive materials during implementation and to facilitate subsequent cleanup, double-layer plastic sheets are laid around the radioactive shielding and sealing devices, as well as on the road surfaces and preparation areas involved in the transfer process.

[0100] Regarding the embodiments of the present invention, it should also be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0101] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A packaging device for radioactive material, comprising: an inner container comprising an inner container body and an inner container cover, wherein the inner container body has a first opening facing downward, the inner container body defines an inner receiving cavity communicating with the first opening for receiving radioactive material, and the inner container cover is detachably connected to the inner container body for sealing the first opening; and The outer container comprises an outer container body and an outer container cover, wherein the outer container body has an upward second opening, the outer container body defines an outer accommodating cavity communicating with the second opening for accommodating the inner container, and the outer container cover is detachably connected to the outer container body for sealing the second opening. A first hoisting assembly is provided on the upper portion of the inner container body for hoisting the inner container into or out of the outer accommodating cavity through the second opening, and when the inner container body is hoisted, the inner container body can be kept in a state with the first opening facing downward.

2. The device according to claim 1, wherein The inner container body comprises: An inner barrel body with upper and lower openings; A first flange connected to the top of the inner barrel body; and The upper end plate of the inner barrel is fixedly connected to the first flange and is used to close the upper opening of the inner barrel body. The inner barrel body, the first flange and the upper end plate of the inner barrel together define the inner receiving cavity, and the inner container cover is detachably connected to the bottom of the inner barrel body. The first lifting assembly includes: A plurality of first hanging parts are arranged on the first flange at intervals along the circumferential direction, and the upper end plate of the inner barrel is provided with a plurality of notches allowing the first hanging parts to extend upward; and / or At least one second lifting portion is provided on the upper end plate of the inner barrel.

3. The device according to claim 2, wherein The inner container body also includes: a second flange connected to the bottom of the inner barrel body, the second flange defining the first opening, the inner container cover being detachably connected to the second flange; and A plurality of ribs connect the first flange and the inner barrel body, and / or connect the second flange and the inner barrel body.

4. The device according to claim 1, wherein The outer container body comprises: An outer barrel body with upper and lower openings; The lower end plate of the outer barrel is fixedly connected to the bottom of the outer barrel body and is used to close the lower opening of the outer barrel body. a third flange connected to the top of the outer barrel body, wherein the outer barrel body, the third flange and the lower end plate of the outer barrel jointly define the outer accommodating cavity, the third flange defines the second opening, and the outer container cover is detachably connected to the third flange; and The second hanging assembly is arranged on the third flange and the outer container cover.

5. The device according to claim 4, wherein The outer container body further comprises: A plurality of guide plates are radially arranged on the lower end plate of the outer barrel, and each of the guide plates is connected to the inner wall of the outer barrel body and extends upward along the inner wall of the outer barrel body.

6. The device according to claim 5, wherein The guide plate comprises: A base portion extending upward from the lower end plate of the outer barrel along the outer barrel body; and A wedge-shaped portion extends upward from the base along the outer barrel body.

7. The device according to claim 4, wherein The third flange includes a horizontal annular portion extending in the radial direction and a vertical annular portion extending upward from the outer edge of the horizontal annular portion. The outer container cover is detachably connected to the end surface of the vertical annular portion; The outer container further comprises a cover plate, which is detachably connected to the horizontal annular portion; At least one hanging portion is provided on the cover plate.

8. The device according to claim 1, wherein The weight of the inner container is set to be less than the weight of the outer container; and / or The radiation shielding capability of the inner container is set to be smaller than the radiation shielding capability of the outer container.

9. A method for packaging a radioactive substance, the method comprising: The inner container body is suspended by a first suspension assembly to cover the inner container body outside the radioactive material; Providing a turning device with a supporting plate, extending the supporting plate of the turning device into the bottom of the inner container body to cover the first opening of the inner container body, and using the turning device to turn the inner container body 180 degrees so that the first opening faces upward; Installing the inner container cover on the inner container body; Using the turning device to turn the inner container 180 degrees so that the inner container cover faces downward; The inner container is hoisted by a first hoisting assembly, the inner container is placed in the outer accommodating cavity of the outer container through the second opening, and the outer container cover is installed on the outer container body.

10. The method according to claim 9, further comprising: measuring the alpha and beta radiation doses on the outer surface of the outer container; When the α and β ray doses are greater than or equal to a preset value, the outer surface of the outer container is wiped.

11. The method according to claim 9, further comprising: measuring a gamma ray dose rate near the outer container; When the gamma ray dose rate near the outer container is greater than or equal to a preset value, a shielding layer is coated on the outer surface of the outer container.

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