A device and method for collecting and temporarily storing radioactive waste sodium

Abstract

The present invention specifically relates to a radioactive waste sodium collection and temporary storage device, including an argon supply and exhaust unit, a portable radioactive waste sodium collection and temporary storage container and a mobile argon storage tank unit; the argon supply and exhaust unit is connected to the pipeline of the plant ventilation system; the portable radioactive waste sodium collection and temporary storage container is connected to the pipeline of the mobile argon storage tank unit, and argon is filled into the portable radioactive waste sodium collection and temporary storage container; the portable radioactive waste sodium collection and temporary storage container is connected to the pipeline of the argon supply and exhaust unit, and the air in the portable radioactive waste sodium collection and temporary storage container is discharged to the plant ventilation system before argon is filled into the portable radioactive waste sodium collection and temporary storage container. The radioactive waste sodium collection and temporary storage device of the present invention effectively solves the problem of collecting and temporarily storing radioactive waste sodium and sodium-contaminated waste from sodium-cooled fast reactors, and improves the safety management level of radioactive waste in nuclear power plants.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive waste treatment, and in particular to a device and method for collecting and temporarily storing radioactive waste sodium. Background Art

[0002] Sodium-cooled fast reactors use liquid sodium metal as a coolant. During operation, sodium-cooled fast reactor units will produce a certain amount of radioactive waste sodium and sodium-contaminated waste. The main sources are the sodium and sodium-contaminated waste left in the replacement and removal of equipment during the maintenance of sodium circuit equipment, as well as the sodium produced during the sampling process of the sodium circuit. A large amount of radioactive waste sodium will also be produced during the decommissioning of fast reactor units. Radioactive waste sodium is not only radioactive, but also has the following characteristics of metallic sodium: metallic sodium is one of the most active metal elements, and metallic sodium easily reacts chemically with water and oxygen in the air; sodium reacts with water to produce strong alkali sodium hydroxide and hydrogen, the reaction is very violent, and is accompanied by the release of a large amount of heat. The reaction product hydrogen may explode when the concentration in the air exceeds 4%; sodium reacts with oxygen to produce a variety of oxides. It is generally believed that when the temperature is higher than 110 to 130 degrees Celsius, sodium will burn; sodium combustion will produce a large amount of sodium aerosol, which mainly has a certain impact on human skin and respiratory system. Therefore, certain measures need to be taken to temporarily store and treat the radioactive waste sodium generated during the operation and decommissioning of the unit, and convert it into a stable state for proper and safe disposal, otherwise there will be major safety hazards.

[0003] Due to the special properties of metallic sodium, the radioactive waste sodium and its sodium-contaminated waste generated during the maintenance process cannot be discarded casually and must be specially collected. The traditional method is to soak the radioactive waste sodium in paraffin oil for temporary storage. However, long-term storage not only poses a risk of paraffin oil leakage, but the mixture of leaked paraffin oil and waste sodium will absorb water and cause fire. It also has an adverse effect on the subsequent treatment process of radioactive waste sodium, posing a major safety hazard. Summary of the invention

[0004] Based on this, it is necessary to provide a radioactive waste sodium collection and temporary storage device and method to address the safety hazards of the existing radioactive waste sodium storage, so as to solve the problem of collection and temporary storage of radioactive waste sodium from sodium-cooled fast reactors and improve the safety management level of radioactive waste in nuclear power plants.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A radioactive waste sodium collection and temporary storage device comprises an argon supply and exhaust unit, a portable radioactive waste sodium collection and temporary storage container and a mobile argon storage tank unit; the argon supply and exhaust unit is connected to a pipeline of a workshop ventilation system; the portable radioactive waste sodium collection and temporary storage container is connected to a pipeline of the mobile argon storage tank unit, and argon is filled into the portable radioactive waste sodium collection and temporary storage container; the portable radioactive waste sodium collection and temporary storage container is connected to a pipeline of the argon supply and exhaust unit, and air in the portable radioactive waste sodium collection and temporary storage container is discharged to the workshop ventilation system before argon is filled into the portable radioactive waste sodium collection and temporary storage container.

[0007] Working principle: After the portable sodium radioactive waste collection and temporary storage container collects the radioactive waste sodium and sodium-contaminated waste generated at the maintenance site, it is connected to the mobile argon storage tank unit pipeline, and argon is filled into the portable sodium radioactive waste collection and temporary storage container; then the portable sodium radioactive waste collection and temporary storage container is transported to the sodium radioactive waste temporary storage point, connected to the argon supply and exhaust unit pipeline, and the gas in the portable sodium radioactive waste collection and temporary storage container is discharged and then filled with argon. The radioactive waste sodium and sodium-contaminated waste in the portable sodium radioactive waste collection and temporary storage container are preserved by covering with argon, meeting the requirements of safe and long-term storage, which greatly improves the safety of radioactive waste sodium storage.

[0008] Furthermore, there are several portable radioactive waste sodium collection and temporary storage containers, each of which includes a temporary storage container body, a sealing cover, a quick interface A and a quick interface B; the upper end of the temporary storage container body is sealingly threadedly connected to the sealing cover, and the lower edge of the sealing cover is bite-engaged and sealed with the temporary storage container body; the upper end of the sealing cover is respectively provided with an exhaust outlet and an argon inlet, the exhaust outlet is connected to the quick interface A pipeline, and the argon inlet is connected to the quick interface B pipeline.

[0009] Furthermore, a sealing gasket is provided between the upper end of the temporary storage container body and the sealing cover.

[0010] Furthermore, the sealing cover matches the size of the temporary storage container body, the upper end of the temporary storage container body is provided with a sealing thread, the sealing cover is provided with a sealing thread, the sealing thread at the upper end of the temporary storage container body matches the sealing thread in the sealing cover, and the upper end of the temporary storage container body is connected to the sealing thread of the sealing cover.

[0011] Furthermore, a fixing pin A and a fixing pin B are symmetrically provided front and back at the lower edge of the sealing cover, and a fixing buckle A and a fixing buckle B are symmetrically provided front and back near the upper edge of the temporary storage container body. The fixing pin A and the fixing pin B are matched with the fixing buckle A and the fixing buckle B respectively, and the fixing pin A and the fixing pin B are respectively engaged and sealed with the fixing buckle A and the fixing buckle B.

[0012] Furthermore, a handle A and a handle B are symmetrically provided at the front and back of the upper middle portion of the temporary storage container body for the staff to carry.

[0013] Furthermore, the temporary storage container body is a stainless steel cylinder, the volume of which matches the storage capacity of radioactive waste sodium, and its size is not limited, so that radioactive waste sodium and sodium-contaminated wastes of different volumes can be collected, thereby reducing the risk in the collection process of radioactive waste sodium and sodium-contaminated wastes; the temporary storage container body and the sealing cover are both made of stainless steel with a thickness of 2-10 mm, which plays a role in radioactive shielding and reduces the exposure dose of operators.

[0014] Furthermore, the mobile argon storage tank unit includes a mobile argon storage tank, an isolation valve B, a quick interface C and a telescopic hose I; the upper end of the mobile argon storage tank is connected to the inlet pipeline of the isolation valve B, and the outlet of the isolation valve B is connected to the quick interface C and the telescopic hose I pipeline in sequence; the telescopic hose I is connected to the quick interface B pipeline, the isolation valve B is opened, and argon is filled into the radioactive waste sodium collection and temporary storage container.

[0015] Furthermore, the portable radioactive waste sodium collection and temporary storage container also includes a pressure gauge C, which is connected to the pipeline on the upper end of the sealing cover. When the portable radioactive waste sodium collection and temporary storage container is filled with argon, when the pressure gauge C displays a pressure greater than 0.2Mpa, the isolation valve B is closed, and the connection between the telescopic hose I and the quick interface B of the sealing cover is disconnected to complete the argon filling; when the portable radioactive waste sodium collection and temporary storage container temporarily stores radioactive waste sodium, when the pressure gauge C displays a pressure greater than 0.3Mpa or less than 0.1Mpa, the gas should be exhausted and filled with argon again; the mobile argon storage tank unit also includes a pressure gauge B, which is connected to the pipeline on the upper end of the mobile argon storage tank; when the mobile argon storage tank is filled with argon, the pressure gauge B displays a pressure greater than 2Mpa.

[0016] Furthermore, the argon supply and exhaust unit includes multiple air supply branches and multiple exhaust branches, each air supply branch is connected to the argon tank; each exhaust branch is connected to the pipeline of the plant ventilation system; the exhaust branch is connected to the quick interface A pipeline to discharge the air in the radioactive waste sodium collection and temporary storage container to the plant ventilation system; the air supply branch is connected to the quick interface B pipeline to fill the radioactive waste sodium collection and temporary storage container with argon.

[0017] Furthermore, the multi-way gas supply branch includes an argon gas tank, an isolation valve A, an air inlet valve A, an air inlet valve B, an air inlet valve C, an air inlet valve D, a telescopic hose B, a telescopic hose C, a telescopic hose E and a telescopic hose G; the outlet of the argon gas tank is connected to the inlet pipeline of the isolation valve A, the outlet of the isolation valve A is respectively connected to the inlet pipelines of the air inlet valve A, the air inlet valve B, the air inlet valve C and the air inlet valve D, the outlet of the air inlet valve A is connected to the telescopic hose B pipeline, the outlet of the air inlet valve B is connected to the telescopic hose C pipeline, the outlet of the air inlet valve C is connected to the telescopic hose E pipeline, and the outlet of the air inlet valve D is connected to the telescopic hose G pipeline; the quick interface B is connected to the telescopic hose B, the telescopic hose C, the telescopic hose E or the telescopic hose G pipeline, the corresponding air inlet valve and the isolation valve A are opened, and argon gas is filled into the radioactive waste sodium collection and temporary storage container.

[0018] Furthermore, the multi-channel gas supply branch also includes a pressure gauge A, the outlet of the isolation valve A is connected to the pressure gauge A pipeline, and when the pressure displayed by the pressure gauge A is less than 0.5Mpa, the argon tank filled with argon is replaced.

[0019] Furthermore, the multi-way exhaust branch includes exhaust valve A, exhaust valve B, exhaust valve C, exhaust valve D, telescopic hose A, telescopic hose D, telescopic hose F and telescopic hose H; the outlets of the exhaust valve A, exhaust valve B, exhaust valve C and exhaust valve D are respectively connected to the pipelines of the factory ventilation system, the inlet of the exhaust valve A is connected to the telescopic hose A pipeline, the inlet of the exhaust valve B is connected to the telescopic hose D pipeline, the inlet of the exhaust valve C is connected to the telescopic hose F pipeline, and the inlet of the exhaust valve D is connected to the telescopic hose H pipeline; the quick interface A is connected to the telescopic hose A, telescopic hose D, telescopic hose F or telescopic hose H pipeline, and the corresponding exhaust valve is opened to discharge the air in the radioactive waste sodium collection and temporary storage container to the factory ventilation system.

[0020] A method for collecting and temporarily storing radioactive waste sodium, using the above-mentioned radioactive waste sodium collection and temporary storage device, comprises the following steps:

[0021] Step 1: The radioactive waste sodium and sodium-contaminated waste generated during the maintenance process at the maintenance site are sealed and collected in a portable radioactive waste sodium collection and temporary storage container;

[0022] Step 2, connecting the portable radioactive waste sodium collection and temporary storage container to the mobile argon gas storage tank unit pipeline, and filling the portable radioactive waste sodium collection and temporary storage container with argon gas;

[0023] Step 3: transport the portable sodium radioactive waste collection and storage container to the sodium radioactive waste storage point, connect the portable sodium radioactive waste collection and storage container to the argon supply and exhaust unit pipeline, exhaust the air in the sodium radioactive waste collection and storage container to the workshop ventilation system, and then fill the sodium radioactive waste collection and storage container with argon.

[0024] Beneficial technical effects of the present invention

[0025] The radioactive waste sodium collection and temporary storage device and method of the present invention can store and transport the radioactive waste sodium in an argon environment after collection, thereby solving the problem of safe storage of radioactive waste sodium and greatly reducing the risk of safe storage of radioactive waste sodium.

[0026] The radioactive waste sodium collection and temporary storage device and method of the present invention provide a radioactive waste sodium collection and temporary storage container that not only has the function of collecting radioactive waste sodium, but also has the function of temporarily storing radioactive waste sodium. The radioactive waste sodium collection and temporary storage container body is made of 2-10 mm stainless steel and has a certain radioactive shielding function, thereby reducing the radiation dose of workers and improving safety. The radioactive waste sodium collection and temporary storage container can be manufactured into containers of different sizes according to the amount of radioactive waste sodium generated on site and the collection requirements, thereby realizing the collection of radioactive waste sodium and sodium-contaminated waste of different volumes and reducing the risk in the process of collecting radioactive waste sodium.

[0027] The radioactive sodium waste collection and temporary storage device and method of the present invention, the mobile argon tank enables the collection and transportation of radioactive sodium waste and sodium-contaminated waste thereof to be free from location restrictions, and can realize the storage of radioactive sodium waste and sodium-contaminated waste thereof in an argon environment, and can realize the rapid switching of the same radioactive sodium waste collection and temporary storage device having the collection and temporary storage functions at the same time, thereby improving the safety of the collection and storage of radioactive sodium waste and sodium-contaminated waste thereof.

[0028] The radioactive waste sodium collection and temporary storage device and method of the present invention comprises an argon supply and exhaust unit including multiple air supply and multiple exhaust branches, which supply and exhaust air to multiple radioactive waste sodium collection and temporary storage containers, thereby realizing temporary storage of radioactive waste sodium and sodium-contaminated waste in multiple different radioactive waste sodium collection and temporary storage containers; the exhaust port of the argon supply and exhaust unit is connected to the radioactive ventilation system of the nuclear facility plant, which can prevent the spread of radioactive substances, reduce the risk of radioactive contamination of workers, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the process of the radioactive waste sodium collection and temporary storage device of the present invention;

[0030] Figure 2 A top view of a temporary storage container for collecting radioactive waste sodium;

[0031] Figure 3 A side view of the sealing cover of a temporary storage container for collecting radioactive waste sodium;

[0032] Figure 4 This is a schematic diagram of the structure of a mobile argon storage tank unit.

[0033] In the figure, 1, temporary storage container body; 2, sealing cover; 3, handle A; 4, handle B; 5, fixing buckle A; 6, fixing buckle B; 7, quick interface A; 8, quick interface B; 9, telescopic hose A; 10, telescopic hose B; 11, exhaust valve A; 12, intake valve A; 13, isolation valve A; 14, argon tank; 15, pressure gauge A; 16, fixing gauze A; 17, fixing gauze B; 18, sealing gasket; 19, intake valve B; 20. Telescopic hose C; 21. Exhaust valve B; 22. Telescopic hose D; 23. Inlet valve C; 24. Telescopic hose E; 25. Exhaust valve C; 26: Telescopic hose F; 27. Inlet valve D; 28. Telescopic hose G; 29. ​​Exhaust valve D; 30. Telescopic hose H; 31. Mobile argon storage tank; 32. Isolation valve B; 33. Quick connector C; 34. Telescopic hose I; 35. Pressure gauge B; 36. Pressure gauge C. DETAILED DESCRIPTION

[0034] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “left end”, “right end”, “above”, “below”, “outside”, “inside”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] The invention provides a radioactive waste sodium collection and temporary storage device, comprising a portable radioactive waste sodium collection and temporary storage container, an argon gas supply and exhaust unit and a mobile argon gas storage tank unit.

[0037] There are several portable radioactive waste sodium collection and temporary storage containers, each of which includes a temporary storage container body 1, a sealing cover 2, a handle A 3, a handle B 4, a fixing buckle A 5, a fixing buckle B 6, a quick interface A 7, a quick interface B 8, a fixing pin A 16, a fixing pin B 17, a sealing gasket 18 and a pressure gauge C 36.

[0038] The sealing cover 2 is matched in size with the temporary storage container body 1, the upper end of the temporary storage container body 1 is provided with a sealing thread, and the sealing cover 2 is provided with a sealing thread. The sealing thread at the upper end of the temporary storage container body 1 matches the sealing thread in the sealing cover 2, and the upper end of the temporary storage container body 1 is connected with the sealing cover 2 through sealing threads. A sealing gasket 18 is provided between the upper end of the temporary storage container body 1 and the sealing cover 2.

[0039] A fixing pin A 16 and a fixing pin B 17 are symmetrically arranged at the lower edge of the sealing cover 2, and a fixing buckle A 5 and a fixing buckle B 6 are symmetrically arranged near the upper edge of the temporary storage container body 1. The fixing pin A 16 and the fixing pin B 17 are matched with the fixing buckle A 5 and the fixing buckle B 6 respectively, and the fixing pin A 16 and the fixing pin B 17 are respectively engaged and sealed with the fixing buckle A 5 and the fixing buckle B 6 to achieve an engaged seal between the lower edge of the sealing cover 2 and the temporary storage container body 1.

[0040] The upper end of the sealing cover 2 is provided with an exhaust outlet and an argon inlet, the exhaust outlet is connected to the pipeline of the quick interface A 7, and the argon inlet is connected to the pipeline of the quick interface B 8. The upper end of the sealing cover 2 is also provided with a pressure gauge C; the pressure gauge C is connected to the pipeline of the upper end of the sealing cover 2.

[0041] The temporary storage container body 1 is a stainless steel cylinder. The volume of the portable radioactive waste sodium collection temporary storage container is designed according to the storage volume of radioactive waste sodium and its sodium-contaminated waste, so as to realize the collection of radioactive waste sodium of different volumes and reduce the risk in the process of radioactive waste sodium collection. The temporary storage container body 1 and the sealing cover 2 are both made of stainless steel with a thickness of 2-10 mm, which plays a role of radioactive shielding and reduces the radiation dose of the operators. The upper and middle parts of the temporary storage container body 1 are symmetrically provided with handles A 3 and handles B 4 for the operators to carry.

[0042] The mobile argon storage tank unit is a movable independent unit, including a mobile argon storage tank 31, an isolation valve B 32, a quick interface C 33, a telescopic hose I 34 and a pressure gauge B 35. The outlet of the isolation valve B 32 is connected to the quick interface C 33 and the telescopic hose I 34 pipelines in sequence; the telescopic hose I 34 is connected to the quick interface B 8 pipeline, the isolation valve B32 is opened, and argon is filled into the radioactive waste sodium collection and temporary storage container.

[0043] The argon supply and exhaust unit includes multiple air supply branches and multiple exhaust branches, each of which is connected to the argon tank, and each of which is connected to the pipeline of the plant ventilation system; the exhaust branch is connected to the quick interface A7 pipeline to exhaust the air in the radioactive sodium waste collection and temporary storage container to the plant ventilation system; the air supply branch is connected to the quick interface B8 pipeline to fill the radioactive sodium waste collection and temporary storage container with argon. The argon supply and exhaust unit can realize the air supply and exhaust of multiple radioactive sodium waste collection and temporary storage containers, and realize the safe temporary storage of radioactive sodium waste and sodium-contaminated waste in multiple different radioactive sodium waste collection and temporary storage containers.

[0044] The multi-way gas supply branch includes an argon gas tank 14, an isolation valve A13, a pressure gauge A15, an air inlet valve A12, an air inlet valve B19, an air inlet valve C23, an air inlet valve D27, a telescopic hose B10, a telescopic hose C20, a telescopic hose E24 and a telescopic hose G28; the outlet of the argon gas tank 14 is connected to the inlet pipeline of the isolation valve A13, the outlet of the isolation valve A13 is respectively connected to the pressure gauge 15, the inlet pipeline of the air inlet valve A12, the inlet pipeline of the air inlet valve B19, the inlet pipeline of the air inlet valve C23 and the inlet pipeline of the air inlet valve D27, the outlet of the air inlet valve A12 is connected to the pipeline of the telescopic hose B10, the outlet of the air inlet valve B19 is connected to the pipeline of the telescopic hose C20, the outlet of the air inlet valve C23 is connected to the pipeline of the telescopic hose E24, and the outlet of the air inlet valve D27 is connected to the pipeline of the telescopic hose G28; the quick interface B 8 is connected to the telescopic hose B 10, the telescopic hose C 20, the telescopic hose E 24 or the telescopic hose G 28 pipeline, the corresponding air inlet valve and the isolation valve A 13 are opened, and argon gas is filled into the radioactive waste sodium collection and temporary storage container.

[0045] The multi-way exhaust branch includes an exhaust valve A11, an exhaust valve B21, an exhaust valve C25, an exhaust valve D29, a telescopic hose A9, a telescopic hose D22, a telescopic hose F26 and a telescopic hose H30; the outlets of the exhaust valve A11, the exhaust valve B21, the exhaust valve C25 and the exhaust valve D29 are respectively connected to the pipelines of the plant ventilation system, the inlet of the exhaust valve A11 is connected to the pipeline of the telescopic hose A9, the inlet of the exhaust valve B21 is connected to the pipeline of the telescopic hose D22, the inlet of the exhaust valve C25 is connected to the pipeline of the telescopic hose F26, and the inlet of the exhaust valve D29 is connected to the pipeline of the telescopic hose H30; the quick interface A7 is connected to the pipeline of the telescopic hose A9, the telescopic hose D22, the telescopic hose F26 or the telescopic hose H30, and the corresponding exhaust valve is opened to discharge the air in the radioactive waste sodium collection and temporary storage container to the plant ventilation system.

[0046] When the mobile argon storage tank 31 is full of argon, the pressure gauge B 35 displays a value greater than 2Mpa; when the portable radioactive waste sodium collection and storage container is filled with argon, when the pressure gauge C displays a value greater than 0.2Mpa, the isolation valve B 32 is closed, and the connection between the telescopic hose I 34 and the quick interface B 8 of the sealing cover is disconnected to complete the argon filling; when the portable radioactive waste sodium collection and storage container temporarily stores radioactive waste sodium, when the pressure gauge C displays a value greater than 0.3Mpa or less than 0.1Mpa, it indicates that the portable radioactive waste sodium collection and storage container has overpressure or leakage, and the container should be vented and filled with argon again; when the pressure gauge A 15 displays a pressure less than 0.5Mpa, it indicates that the argon in the compressed gas tank is insufficient, and the argon tank 14 filled with argon should be replaced.

[0047] The radioactive waste sodium collection and temporary storage device is used to collect radioactive waste sodium, including the following steps:

[0048] 1. When the maintenance staff is inspecting the radioactive sodium waste equipment, they go to the radioactive sodium waste temporary storage point to borrow the portable radioactive sodium waste collection temporary storage container and the mobile argon storage tank. At this time, the mobile argon storage tank is full of argon, and the pressure gauge B 35 of the mobile argon storage tank shows more than 2Mpa. Before borrowing, measure and weigh the portable radioactive sodium waste collection temporary storage container and record it;

[0049] 2. During the maintenance process, the sealing cover 2 is removed, and the radioactive waste sodium and sodium-contaminated waste generated during the maintenance process are collected in a portable radioactive waste sodium collection and temporary storage container, and after the collection is completed, the container is sealed with the sealing cover 2;

[0050] 3. Connect the telescopic hose I 34 of the mobile argon storage tank 31 to the quick interface B 8 of the sealing cover 2, open the isolation valve B 32 of the mobile argon storage tank, and fill the argon in the mobile argon storage tank into the portable radioactive waste sodium collection and storage container. When the pressure gauge C 36 of the portable radioactive waste sodium collection and storage container displays 0.2Mpa, close the isolation valve B 32 of the mobile argon storage tank and disconnect the telescopic hose I 34 from the quick interface B 8 of the sealing cover 2.

[0051] The use of the above-mentioned radioactive waste sodium collection and temporary storage device to transport and receive radioactive waste sodium includes the following steps:

[0052] 1. The maintenance staff transports the portable radioactive waste sodium collection and temporary storage container to the radioactive waste sodium temporary storage point;

[0053] 2. Radioactive waste management personnel shall measure, weigh and record the portable radioactive waste sodium collection and temporary storage containers, and handle the transfer and acceptance procedures for the radioactive waste sodium;

[0054] 3. Retrieve the mobile argon tank unit.

[0055] The radioactive waste sodium storage device is used to store radioactive waste sodium, including the following steps:

[0056] 1. Place the portable radioactive waste sodium collection and temporary storage container in a fixed location;

[0057] 2. Connect any one of the telescopic hoses A 9, D 22, F 26 and H 30 in the argon supply and exhaust unit to the quick connector A 7 of the sealing cover 2, open the corresponding exhaust valve, and exhaust the air in the radioactive waste sodium temporary storage container;

[0058] 3. Close the exhaust valve, connect any one of the telescopic hoses B10, C 20, E 24 and G 28 in the argon supply and exhaust unit to the quick interface B8 of the sealing cover 2, open the corresponding air inlet valve and isolation valve A 13, and when the pressure gauge C 36 of the portable radioactive waste sodium collection temporary storage container shows 0.2Mpa, close the corresponding isolation valve A 13 and the air inlet valve, and complete the filling of argon protection into the portable radioactive waste sodium temporary storage container;

[0059] 4. Regularly check the portable radioactive sodium waste collection and storage containers at the radioactive sodium waste storage point. When the pressure gauge C shows a value greater than 0.3Mpa or less than 0.1Mpa, it indicates that the portable radioactive sodium waste collection and storage container is over-pressurized or leaking. The container should be re-exhausted and refilled with argon according to steps 2 and 3 above. When the pressure gauge A 15 shows a pressure less than 0.5Mpa, replace the argon tank 14 filled with argon.

[0060] Similarly, when another working group needs to collect radioactive waste sodium, they can follow the above steps and use another portable radioactive waste sodium collection and storage container to collect, transport and store it. The radioactive waste sodium and its sodium-contaminated waste can be safely stored in multiple radioactive waste sodium collection and storage containers as needed.

[0061] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A radioactive waste sodium collection and temporary storage device, characterized in that: It comprises an argon supply and exhaust unit, a portable radioactive waste sodium collection and temporary storage container and a mobile argon storage tank unit; the argon supply and exhaust unit is connected to the pipeline of the workshop ventilation system; the portable radioactive waste sodium collection and temporary storage container is connected to the pipeline of the mobile argon storage tank unit, and argon is filled into the portable radioactive waste sodium collection and temporary storage container; the portable radioactive waste sodium collection and temporary storage container is connected to the pipeline of the argon supply and exhaust unit, and the air in the portable radioactive waste sodium collection and temporary storage container is discharged to the workshop ventilation system and then argon is filled into the portable radioactive waste sodium collection and temporary storage container; There are a plurality of portable radioactive sodium waste collection and temporary storage containers, each of which comprises a temporary storage container body (1), a sealing cover (2), a quick interface A (7) and a quick interface B (8); the upper end of the temporary storage container body (1) is sealed and threadedly connected to the sealing cover (2), and the lower edge of the sealing cover (2) is sealed and snap-fitted to the temporary storage container body (1); an exhaust outlet and an argon gas inlet are respectively provided at the upper end of the sealing cover (2), the exhaust outlet is connected to the quick interface A (7) pipeline, and the argon gas inlet is connected to the quick interface B (8) pipeline; The mobile argon storage tank unit comprises a mobile argon storage tank (31), an isolation valve B (32), a quick interface C (33) and a telescopic hose I (34); the upper end of the mobile argon storage tank (31) is connected to the inlet pipeline of the isolation valve B (32), and the outlet of the isolation valve B (32) is connected to the quick interface C (33) and the telescopic hose I (34) pipeline in sequence; the telescopic hose I (34) is connected to the quick interface B (8) pipeline, the isolation valve B (32) is opened, and argon is filled into the radioactive waste sodium collection and temporary storage container; The portable radioactive waste sodium collection and temporary storage container further comprises a pressure gauge C (36), which is connected to the pipeline at the upper end of the sealing cover (2); the mobile argon storage tank unit further comprises a pressure gauge B (35), which is connected to the pipeline at the upper end of the mobile argon storage tank (31); when the pressure gauge C (36) shows a pressure greater than 0.2Mpa, the isolation valve B (32) is closed, the connection between the telescopic hose I (34) and the quick interface B (8) of the sealing cover (2) is disconnected, and argon filling is completed; when the pressure gauge C (36) shows a pressure greater than 0.3Mpa or less than 0.1Mpa, exhaust and argon filling are performed again; when the mobile argon storage tank is full of argon, the pressure gauge B (35) shows a pressure greater than 2Mpa.

2. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: A sealing gasket (18) is provided between the upper end of the temporary storage container body (1) and the sealing cover (2).

3. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: The sealing cover (2) is matched in size with the temporary storage container body (1); a sealing thread is provided at the upper end of the temporary storage container body (1); a sealing thread is provided inside the sealing cover (2); the sealing thread at the upper end of the temporary storage container body (1) matches the sealing thread inside the sealing cover (2); and the upper end of the temporary storage container body (1) is connected to the sealing cover (2) by the sealing thread.

4. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: A fixing pin A (16) and a fixing pin B (17) are symmetrically arranged at the front and rear sides of the lower edge of the sealing cover (2); a fixing buckle A (5) and a fixing buckle B (6) are symmetrically arranged at the front and rear sides of the upper edge of the temporary storage container body (1); the fixing pin A (16) and the fixing pin B (17) are matched with the fixing buckle A (5) and the fixing buckle B (6) respectively; and the fixing pin A (16) and the fixing pin B (17) are respectively engaged and sealed with the fixing buckle A (5) and the fixing buckle B (6).

5. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: The upper middle portion of the temporary storage container body (1) is symmetrically provided with a handle A (3) and a handle B (4).

6. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: The temporary storage container body (1) is a stainless steel cylinder, the volume of which matches the storage capacity of radioactive waste sodium; the temporary storage container body (1) and the sealing cover (2) are both made of stainless steel with a thickness of 2-10 mm.

7. The radioactive waste sodium collection and temporary storage device according to claim 1, characterized in that: The argon supply and exhaust unit comprises multiple air supply branches and multiple exhaust branches, each of which is connected to an argon tank (14); each exhaust branch is connected to a pipeline of a factory ventilation system; the exhaust branch is connected to a pipeline of a quick interface A (7) to exhaust air in a radioactive sodium waste collection and temporary storage container to the factory ventilation system; the air supply branch is connected to a pipeline of a quick interface B (8) to fill argon gas into the radioactive sodium waste collection and temporary storage container.

8. The radioactive waste sodium collection and temporary storage device according to claim 7, characterized in that: The multi-way gas supply branch comprises an argon gas tank (14), an isolation valve A (13), an air inlet valve A (12), an air inlet valve B (19), an air inlet valve C (23), an air inlet valve D (27), a telescopic hose B (10), a telescopic hose C (20), a telescopic hose E (24) and a telescopic hose G (28); the outlet of the argon gas tank (14) is connected to the inlet pipeline of the isolation valve A (13), the outlet of the isolation valve A (13) is connected to the inlet pipelines of the air inlet valve A (12), the air inlet valve B (19), the air inlet valve C (23) and the air inlet valve D (27), respectively, the air inlet valve The outlet of A (12) is connected to the pipeline of the flexible hose B (10), the outlet of the air inlet valve B (19) is connected to the pipeline of the flexible hose C (20), the outlet of the air inlet valve C (23) is connected to the pipeline of the flexible hose E (24), and the outlet of the air inlet valve D (27) is connected to the pipeline of the flexible hose G (28); the quick interface B (8) is connected to the pipeline of the flexible hose B (10), the flexible hose C (20), the flexible hose E (24) or the flexible hose G (28), the corresponding air inlet valve and the isolation valve A (13) are opened, and argon gas is filled into the radioactive waste sodium collection and temporary storage container.

9. The radioactive waste sodium collection and temporary storage device according to claim 8, characterized in that: The multi-channel gas supply branch also includes a pressure gauge A (15), the outlet of the isolation valve A (13) is connected to the pipeline of the pressure gauge A (15), and when the pressure displayed by the pressure gauge A (15) is less than 0.5Mpa, the argon tank (14) filled with argon is replaced.

10. The radioactive waste sodium collection and temporary storage device according to claim 7, characterized in that: The multi-way exhaust branch comprises an exhaust valve A (11), an exhaust valve B (21), an exhaust valve C (25), an exhaust valve D (29), a telescopic hose A (9), a telescopic hose D (22), a telescopic hose F (26) and a telescopic hose H (30); the outlets of the exhaust valve A (11), the exhaust valve B (21), the exhaust valve C (25) and the exhaust valve D (29) are respectively connected to the pipelines of the factory building ventilation system, the inlet of the exhaust valve A (11) is connected to the pipeline of the telescopic hose A (9), and the The inlet of the exhaust valve B (21) is connected to the pipeline of the flexible hose D (22), the inlet of the exhaust valve C (25) is connected to the pipeline of the flexible hose F (26), and the inlet of the exhaust valve D (29) is connected to the pipeline of the flexible hose H (30); the quick interface A (7) is connected to the pipeline of the flexible hose A (9), the flexible hose D (22), the flexible hose F (26) or the flexible hose H (30), and the corresponding exhaust valve is opened to discharge the air in the radioactive waste sodium collection temporary storage container to the factory ventilation system.

11. A method for collecting and temporarily storing radioactive waste sodium, characterized in that: The use of the radioactive waste sodium collection and temporary storage device according to any one of claims 1 to 10 comprises the following steps: Step 1: The radioactive waste sodium and sodium-contaminated waste generated during the maintenance process at the maintenance site are sealed and collected in a portable radioactive waste sodium collection and temporary storage container; Step 2, connecting the portable radioactive waste sodium collection and temporary storage container to the mobile argon gas storage tank unit pipeline, and filling the portable radioactive waste sodium collection and temporary storage container with argon gas; Step 3: transport the portable sodium radioactive waste collection and storage container to the sodium radioactive waste storage point, connect the portable sodium radioactive waste collection and storage container to the argon supply and exhaust unit pipeline, exhaust the air in the sodium radioactive waste collection and storage container to the workshop ventilation system, and then fill the sodium radioactive waste collection and storage container with argon.

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