Radioactive Metal Sample Storage Device

Abstract

The present invention relates to a radioactive metal sample storage device, comprising a sealed shielding lead cover, a sample hanging basket, a vacuum tank and a storage well; the sealed shielding lead cover is connected to the sample hanging basket and can cooperate with the vacuum tank to form a storage space; heavy concrete is arranged around the storage well; the vacuum tank can be placed in the storage well. The beneficial effects of the present invention are as follows: the present invention stores samples in a vacuum tank, which can achieve the effects of anti-oxidation and anti-corrosion during the storage process, and achieves radiation shielding in all directions during the storage of radioactive samples through the storage well and the sealed shielding lead cover, while having the functions of sample anti-oxidation and corrosion and radiation shielding, it also achieves the purpose of saving costs and avoiding pollution.

Description

Technical Field

[0001] The invention belongs to the field of nuclear industry, and in particular relates to a radioactive metal sample storage device. Background Art

[0002] In the application and development of material engineering in the nuclear field, it is often necessary to test and study radioactive metal samples. These samples are highly radioactive and will cause radioactive contamination to personnel and the environment if not stored properly. Because these test samples may be reactivated in the future for the extension of nuclear power plant life and material research and development, they need to be properly preserved to reduce their impact on personnel and the environment, and to prevent oxidation corrosion and other reasons that may cause sample failure during the storage process. At present, radioactive metal sample storage devices mostly use nitrogen or organic solutions to preserve samples, but the former has poor preservation effect and high cost, and the latter will cause the samples to stick with a large amount of organic solvents, which makes it more troublesome to clean the samples when they are reactivated, and will produce a large amount of radioactive waste liquid.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a radioactive metal sample storage device, which can at least provide a new storage method and effectively solve the problems of high nitrogen storage cost and radioactive waste liquid generated by organic solvents.

[0005] The technical solution of the present invention is as follows:

[0006] A radioactive metal sample storage device comprises a sealed shielding lead cover, a sample hanging basket, a vacuum tank and a storage well; the sealed shielding lead cover is connected to the sample hanging basket and can cooperate with the vacuum tank to form a storage space; the storage well is made of heavy concrete; the vacuum tank can be placed in the storage well; and a vacuum extraction structure is also provided on the sealed shielding lead cover.

[0007] Furthermore, the above-mentioned radioactive metal sample storage device also includes an outer sleeve, which is arranged on the inner wall of the storage well and can provide support for the vacuum tank.

[0008] Furthermore, in the above-mentioned radioactive metal sample storage device, the vacuum tank is a tank body with a flange and an upper opening, and the vacuum tank is in contact with the outer sleeve (6) through an inclined surface arranged at the connection between the tank body and the flange to support the vacuum tank to be suspended in the storage well.

[0009] Furthermore, in the above-mentioned radioactive metal sample storage device, the flange has a circle of grooves, and the grooves have a sealing O-ring that cooperates with the sealing shielding lead cover.

[0010] Furthermore, in the above-mentioned radioactive metal sample storage device, the flange and the sealed shielding lead cover are provided with fastening structures that can cooperate with each other to relatively fix the sealed shielding lead cover and the vacuum tank.

[0011] Furthermore, in the above-mentioned radioactive metal sample storage device, the sealed shielding lead cover includes an outer shell and a lead shielding layer inside the outer shell; the vacuum pumping structure is an air pipe running through the upper and lower parts of the sealed shielding lead cover; the air pipe is arranged inside the sealed shielding lead cover.

[0012] Furthermore, in the above-mentioned radioactive metal sample storage device, the air pipe is provided with a turning part in the sealed shielding lead cover, so as to prevent radiation from leaking from the air pipe.

[0013] Furthermore, in the above-mentioned radioactive metal sample storage device, there are two air pipes, one of which is equipped with a pressure gauge at the tail end to monitor the internal pressure of the vacuum tank, and the other is divided into two paths at the tail end, each of which is equipped with a valve for inflating and evacuating the vacuum tank.

[0014] Furthermore, in the above-mentioned radioactive metal sample storage device, a lifting ring is installed on the upper part of the sealed shielding lead cover.

[0015] Furthermore, in the above-mentioned radioactive metal sample storage device, the sample hanging basket is provided with at least two storage spaces, each storage space is provided with a sample box, and the sample box is provided with a self-locking pin for fixing the sample box and the sample hanging basket.

[0016] The beneficial effects of the present invention are as follows:

[0017] The present invention stores samples in a vacuum tank, which can achieve the effects of anti-oxidation and anti-corrosion during the storage process. Radiation shielding in all directions during the storage of radioactive samples is achieved through storage wells and sealed shielding lead covers. While having the functions of sample anti-oxidation and corrosion and radiation shielding, it also achieves the purpose of saving costs and avoiding pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the radioactive metal sample storage device of the present invention.

[0019] Figure 2 for Figure 1 A partial enlarged view of the structure in the middle circle.

[0020] In the above drawings, 1. Sealing shielding lead cover; 2. Sample hanging basket; 3. Vacuum tank; 4. Lead cover; 5. Storage well; 6. Outer sleeve; 7. Sample box; 8. Hanging basket ring; 9. Lifting ring; 10. Air pipe. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, the present invention provides a radioactive metal sample storage device, comprising a sealed shielding lead cover 1, a sample hanging basket 2, a vacuum tank 3 and a storage well 5; the sealed shielding lead cover 1 is connected to the sample hanging basket 2, and can cooperate with the vacuum tank 3 to form a storage space; heavy concrete is arranged around the storage well 5 to shield the radiation from leaking to the surroundings and downwards; the vacuum tank 3 can be placed in the storage well 5; and a vacuum extraction structure is also provided on the sealed shielding lead cover 1.

[0023] like Figure 2 As shown, in this embodiment, an outer sleeve is also included, which is arranged on the inner wall of the storage well 5 and can support the vacuum tank 3. The outer sleeve 6 is a carbon steel pipe, which can form a channel in the heavy concrete and provide a channel for the bottom of the vacuum tank 3.

[0024] The vacuum tank 3 is a tank body with a flange that is open at the upper end. The vacuum tank 3 is in contact with the outer sleeve 6 through the upper end inclined surface provided at the connection between the tank body and the flange to support the vacuum tank 3 to be suspended in the storage well 5. There is a circle of grooves on the flange, and there is a sealing O-ring in the groove, which cooperates with the sealing shielding lead cover 1 to prevent air from entering and exiting the vacuum tank 3, so that the vacuum tank 3 can be evacuated to a vacuum state. The flange and the sealing shielding lead cover 1 are provided with a fastening structure that can cooperate with each other to fix the sealing shielding lead cover 1 relative to the vacuum tank 3. In this embodiment, the fastening structure includes a threaded hole provided on the flange edge of the vacuum tank 3, a through hole and a bolt provided on the sealing shielding lead cover 1. Through the fixation of the threaded hole, the through hole and the bolt, the vacuum tank 3 and the sealing shielding lead cover 1 can form a whole, which is convenient for overall transfer.

[0025] The sealed shielding lead cover 1 includes an outer shell and a lead shielding layer inside the outer shell; the vacuum pumping structure is provided with an air pipe 10 running through the upper and lower parts of the sealed shielding lead cover; the air pipe 10 is arranged inside the sealed shielding lead cover 1. . The outer shell is a stainless steel shell, and the lead shielding layer is cast by metal lead, which has the functions of shielding upward rays, connecting the sample hanging basket 2, connecting the vacuum storage container, inflating and vacuuming. The air pipe 10 is provided with a turning part in the sealed shielding lead cover 1 to prevent the rays from leaking from the air pipe 10. There are two air pipes, one of which is equipped with a pressure gauge at the tail end to monitor the internal pressure of the vacuum tank 3, and the other tail is divided into two ways, and each is equipped with a valve for inflating and vacuuming the vacuum tank 3.

[0026] A lifting ring 9 is installed on the upper part of the sealed shielding lead cover 1, so that the sealed shielding lead cover 1 together with the sample hanging basket 2 can be lifted by a crane; when the vacuum tank 3 and the sealed shielding lead cover 1 are connected by a fastening structure, the crane can also lift and move the sealed shielding lead cover 1, the sample hanging basket 2 and the vacuum tank 3 together through the lifting ring 9.

[0027] The sample hanging basket 2 is connected to the sealed shielding lead cover 1 through the hanging basket ring 8, and is provided with at least two storage spaces (30 in this embodiment). The storage space can be divided by a partition, and each storage space is provided with a sample box 7. The sample box 7 is provided with a self-locking pin for fixing the sample box 7 and the sample hanging basket 2. The pin is inserted into the locking hole at the front of the partition to fix the sample box 7 and the sample hanging basket 2, ensuring that the sample box 7 will not fall during the movement of the hanging basket, thereby avoiding the scattering of radioactive samples.

[0028] The sample box 7 is a square box with an open top, which can hold a large number of impact, CT, tensile and other samples; the front of the sample box 7 is a locking device composed of a spring, a lock, etc., which can fix the sample box 7 to the sample hanging basket 2; the end face of the sample box 7 has a unique number, which is used to record the sample storage file.

[0029] The storage device can be arranged in a rectangular array, thereby increasing the number of radioactive metal samples that can be stored in the entire storage system. The device not only meets the requirements for storing radioactive metal samples, but also facilitates the storage and removal of samples, prevents the samples from being scattered, and can also relocate the entire vacuum storage device.

[0030] In addition, a lead cover 4 is provided above the storage well 5, which can both support the vacuum tank 3 and shield radiation from leaking obliquely from above.

[0031] When in use, first open the vent valve, unlock it, seal the fixing screws on the shielding lead cover 1, fill air into the vacuum tank 3, and balance the pressure inside and outside the vacuum tank 3; secondly, hang the crane hook on the lifting ring 9, and lift the entire hanging basket out of the vacuum tank 3 by the crane; again, transport the hanging basket to the sample operation platform, and adjust the height by the crane so that the designated sample box 7 is flush with the operation platform; then, unlock the locking device on the sample box 7 by the manipulator, and pull the sample box 7 out of the hanging basket; then, take out or put in the radioactive metal sample by the manipulator, and when the relevant operations are completed, put the sample box 7 back into the hanging basket, and ensure that the sample box 7 is in a locked state; finally, transport the hanging basket back to the storage well 5 by the crane, remove the hook, close the vent valve, open the exhaust valve at the same time, and turn on the vacuum pump to extract the air in the vacuum tank 3. When the pressure drops to a certain level, close the exhaust valve and the vacuum pump, thereby completing the entire process of storing or taking out the sample.

[0032] The present invention stores samples in a vacuum tank 3, which can achieve the effects of anti-oxidation and anti-corrosion during the storage process. Radiation shielding in all directions during the storage of radioactive samples is achieved through the storage well 5 and the sealed shielding lead cover 1. While having the functions of sample anti-oxidation and corrosion and radiation shielding, it also achieves the purpose of saving costs and avoiding pollution.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A radioactive metal sample storage device, characterized in that: The invention comprises a sealed shielding lead cover (1), a sample hanging basket (2), a vacuum tank (3) and a storage well (5); the sealed shielding lead cover (1) is connected to the sample hanging basket (2) and can cooperate with the vacuum tank (3) to form a storage space; the sealed shielding lead cover (1) comprises an outer shell and a lead shielding layer inside the outer shell; the sample hanging basket (2) is provided with at least two storage spaces, each storage space is parallel to each other in the axial direction, and the storage well (5) is made of heavy concrete; the vacuum tank (3) can be placed in the storage well (5); the storage well (5) A cylindrical lead cover (4) is also provided above the lead cover (4) to shield radiation leakage from the upper oblique direction; the radius of the lead cover (4) is greater than the radius of the storage well (5); the bottom of the lead cover (4) is arranged in a cone shape; the lead shielding layer of the sealed shielding lead cover (1) is in a cone shape; a guide angle is provided at the bottom of the lead shielding layer to guide the sealed shielding lead cover (1) into the lead cover (4); the size and shape of the lead shielding layer match the size and shape of the lead cover (4); and a vacuum extraction structure is also provided on the sealed shielding lead cover (1).

2. The radioactive metal sample storage device according to claim 1, characterized in that: It also comprises an outer sleeve, which is arranged on the inner wall of the storage well (5) and can support the vacuum tank (3).

3. The radioactive metal sample storage device according to claim 2, characterized in that: The vacuum tank (3) is a tank body with a flange and an opening at the upper end. The vacuum tank (3) is in contact with the outer sleeve (6) via an inclined surface provided at the connection between the tank body and the flange, so as to support the vacuum tank (3) to be suspended in the storage well (5).

4. The radioactive metal sample storage device according to claim 3, characterized in that: The flange has a groove with a sealing O-ring in the groove, which cooperates with the sealing shielding lead cover (1).

5. The radioactive metal sample storage device according to claim 4, characterized in that: The flange and the sealed shielding lead cover (1) are provided with fastening structures that can cooperate with each other so as to relatively fix the sealed shielding lead cover (1) and the vacuum tank (3).

6. The radioactive metal sample storage device according to claim 1, characterized in that: The vacuum extraction structure is an air pipe (10) that passes through the upper and lower parts of the sealed shielding lead cover; the air pipe (10) is arranged inside the sealed shielding lead cover (1).

7. The radioactive metal sample storage device according to claim 6, characterized in that: The air pipe (10) is provided with a turning portion in the sealed shielding lead cover (1), thereby preventing radiation from leaking from the air pipe.

8. The radioactive metal sample storage device according to claim 7, characterized in that: There are two air pipes (10), one of which is equipped with a pressure gauge at the tail end to monitor the internal pressure of the vacuum tank (3), and the other is divided into two paths at the tail end, each of which is equipped with a valve for inflating and evacuating the vacuum tank (3).

9. The radioactive metal sample storage device according to any one of claims 1 to 8, characterized in that: A lifting ring (9) is installed on the upper part of the sealed shielding lead cover (1).

10. The radioactive metal sample storage device according to any one of claims 1 to 8, characterized in that: Each storage space is provided with a sample box (7), and the sample box (7) is provided with a self-locking pin for fixing the sample box (7) and the sample hanging basket (2).

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