Discharge interface device and discharge system

Abstract

The application relates to a kind of unloading interface device and unloading system.The unloading interface device is used to be connected between unloading well and tank body, and the unloading interface device includes main body, first interface piece, second interface piece and multiple sealing pieces, the main body is used to be connected to the bottom wall of unloading well, the main body has oppositely arranged first end and second end, and channel is passed through the first end and the second end;The first end is used to be arranged at the unloading port, and the second end is used to be arranged at the opening, and the channel can be communicated with the unloading port and the opening;First interface piece and second interface piece, first interface piece is arranged at first end, and second interface piece is arranged at second end;At least one sealing piece in multiple sealing pieces is arranged on the side of first interface piece away from second interface piece, and at least another sealing piece is arranged on the side of second interface piece away from first interface piece.The application can reduce the work of secondary cleaning of tank body, reduce radioactive material pollution, and improve the safety of unloading work.

Description

Technical Field

[0001] This application relates to the field of spent fuel technology, and in particular to a spent fuel unloading interface device and unloading system. Background Technology

[0002] In related technologies, the unloading process of spent fuel involves hoisting a transport container fully loaded with spent fuel into a deep well filled with water for unloading. Because the solution in the unloading pool is highly radioactive, the entire outer surface of the transport container remains radioactive after unloading. Therefore, a dedicated cleaning well is needed to clean the outer surface of the transport container. However, this cleaning process introduces new sources of radioactive contamination, and operations between different wells increase the risk of radiation exposure for personnel. Summary of the Invention

[0003] Therefore, it is necessary to propose a discharge interface device and discharge system to address the high operational risks in the unloading process of spent fuel in related technologies.

[0004] According to a first aspect of this application, a discharge interface device is provided for connecting a discharge well and a tank; the discharge well is provided with a cover capable of opening or closing a discharge port of the discharge well, and the tank has a receiving cavity for receiving spent fuel and an opening communicating with the receiving cavity; the discharge interface device includes:

[0005] The system comprises a main body, a first interface component, and a second interface component. The main body has a first end and a second end disposed opposite to each other, and a channel penetrating the first end and the second end. The first end is disposed at the discharge port, and the second end is disposed at the opening. The channel connects the discharge port and the opening. The first interface component is disposed at the first end, and the second interface component is disposed at the second end.

[0006] A plurality of seals, at least one of the seals being used to seal between the first interface and the cover that closes the discharge port, and at least another seal being used to seal between the second interface and the tank.

[0007] In one embodiment, the first interface member has an annular first groove on the side surface opposite to the main body, and the corresponding sealing member is installed in the first groove;

[0008] The second interface component has an annular second groove on the side surface opposite to the main body, and the corresponding sealing component is installed in the second groove.

[0009] In one embodiment, both the first groove and the second groove are provided in multiples; each of the first grooves is equipped with a corresponding sealing element, and each of the second grooves is equipped with a corresponding sealing element.

[0010] In one embodiment, the first groove and the second groove are arranged around the central axis of the channel.

[0011] In one embodiment, the unloading interface device includes an inflation component;

[0012] In the first interface component, a first through hole is provided between at least two adjacent first grooves; in the second interface component, a second through hole is provided between at least two adjacent second grooves.

[0013] The air outlet of the inflatable component is connected to the first through hole and / or the second through hole.

[0014] In one embodiment, the unloading interface device further includes an inflation mechanism connected to the inflation member; and / or

[0015] The unloading interface device further includes a pressure monitoring mechanism, which is connected to the inflation component; and / or

[0016] The unloading interface device further includes a leakage detection mechanism connected to the inflation component; and / or

[0017] The unloading interface device also includes a leakage collection mechanism, which is connected to the inflation component.

[0018] In one embodiment, the second interface member has a guide section, a portion of which is configured to extend into the receiving cavity via the opening.

[0019] In one embodiment, the cross-sectional area of ​​the guide segment is smaller the closer it is to the opening along the extension direction of the central axis of the channel.

[0020] In one embodiment, the body includes a first segment and a second segment connected sequentially along the extension direction of the central axis of the channel;

[0021] The main body includes a first segment and a second segment connected sequentially along the central axis of the channel; the end of the first segment opposite to the second segment is the first end, and the end of the second segment opposite to the first segment is the second end; the second segment is configured such that the first end and the second end tend to move away from each other under the action of external force.

[0022] The directions in which the first end and the second end move away from each other are parallel to the direction of extension of the central axis of the channel.

[0023] In one embodiment, the second segment is detachably connected to the second interface member, and at least one of the seals is provided between the second segment and the second interface member.

[0024] In one embodiment, the unloading interface device further includes an elastic element configured as a rotating body around the central axis of the channel, the elastic element being sleeved on the outer side of the second section; the elastic element is connected to the second interface member.

[0025] In one embodiment, the elastic element is configured to cause the second interface element and the opening to tend to move closer together under the action of an external force; and / or

[0026] Under the same external force, along the extension direction of the central axis of the channel, the expansion deformation of the elastic element is greater than that of the second segment; and / or

[0027] The elastic element is configured to tend to expand in a direction perpendicular to the central axis away from the channel under the action of external force.

[0028] In one embodiment, the discharge port device further includes a replenishment pipe communicating with the channel; when the cover closes the discharge port, the replenishment pipe can replenish the discharge medium into the channel to balance the pressure on both sides of the cover; and / or

[0029] When the cover closes the discharge port, the drain pipe can discharge the discharge medium in the channel.

[0030] In one embodiment, the unloading interface device further includes a first fixing member; the first interface member can be fixedly connected to the unloading well by means of the first fixing member; and / or

[0031] The unloading interface device also includes a second fixing member, which can be fixedly connected to the tank body by means of the second fixing member.

[0032] According to a second aspect of this application, a discharge system is provided, including a discharge well and a discharge interface device as described in any previous embodiment; the discharge interface device is used to connect to the discharge well and a tank body, the discharge well is provided with a cover capable of opening or closing the discharge port of the discharge well, and the tank body has a receiving cavity for receiving spent fuel and an opening communicating with the receiving cavity;

[0033] The unloading system includes a closed channel state and a closed channel state;

[0034] In the closed state of the channel, the cover closes the discharge port, and at least one of the sealing elements is sealed between the first interface element and the cover.

[0035] When the channel is open, the cover opens the discharge port, and the second end is located at the opening. At least one other sealing element is connected between the second interface element and the tank.

[0036] In the aforementioned unloading interface device and unloading system, the unloading interface device can be installed on the bottom wall of the unloading well. The unloading interface device includes at least a main body, a first interface component, a second interface component, and multiple sealing components. The main body has a through channel, allowing the tank containing spent fuel to be connected to the unloading port on the bottom wall of the unloading well for unloading. By setting a sealing component on the second interface component, the sealing component can be sealed between the second interface component and the opening of the tank, thereby improving the sealing effect during unloading and reducing the possibility of radioactive material leakage. Furthermore, by setting a sealing component on the first interface component, the sealing component can be sealed between the first interface component and the cover of the unloading well, thereby improving the sealing effect of the cover after unloading and reducing the risk of leakage of solution from the unloading pool. Thus, with the help of the unloading interface device, the unloading of tanks containing spent fuel can be safely connected to the outside of the unloading well for unloading, reducing the need for secondary cleaning of the tanks, reducing radioactive material contamination, and improving the safety of the unloading operation. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the unloading system in one embodiment of this application.

[0038] Figure 2 This is a cross-sectional schematic diagram of the unloading interface device in the installation environment according to one embodiment of this application.

[0039] Figure 3 for Figure 2 A schematic diagram of the sealing element corresponding to the first interface component.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10. Unloading well; 11. Bottom wall; 11a. Unloading port; 12. Cover body;

[0042] Tank body 20, receiving cavity 20a, opening 20b, third fixing member 21, spent fuel M;

[0043] Unloading interface device 100;

[0044] Main body 110, first end N1, second end N2, channel Q, central axis Z of the channel, first segment 111, second segment 112;

[0045] First interface component 120, first through hole 120a;

[0046] Second interface component 130, body 131;

[0047] Seal K1;

[0048] Inflatable component K2;

[0049] First fixing member 140; rotating part 141, first fixing part 142, second fixing part 143, third fixing part 144, first connecting part 145;

[0050] Second fastener 150, fourth fastener 151, second connecting part 152;

[0051] Connector 160;

[0052] Elastic element 170;

[0053] First protective component 180;

[0054] Second protective component 190;

[0055] Infusion tube L1, drainage tube L2;

[0056] A. Pressure monitoring agency; B. Leak detection agency; C. Leak collection agency. Detailed Implementation

[0057] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0058] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0059] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0060] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0061] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0063] Due to the high radiation levels of spent fuel, sufficient shielding measures must be maintained during the removal of the upper shielding cover of the spent fuel transport container and the unloading of spent fuel to prevent operators from receiving excessive radiation doses during the operation.

[0064] Traditional spent fuel unloading processes involve immersing the entire spent fuel container in an unloading pool. However, due to the high radioactivity of the pool solution, the entire outer surface of the container becomes radioactively contaminated after unloading. This necessitates the construction of dedicated cleaning wells to remove the contaminants, introducing new sources of radioactive contamination. Furthermore, operations between different pools require on-site personnel for tasks such as connecting and disassembling lifting equipment, potentially exposing personnel to excessive radiation and compromising their safety. Therefore, traditional unloading processes suffer from several drawbacks: the introduction of new radioactive contamination sources, extensive cleaning work, increased risk of radiation exposure to personnel, and long unloading cycles. Given these issues, it is essential to develop an efficient and convenient spent fuel unloading process and sealing technology.

[0065] Based on this, embodiments of this application provide a discharge interface device and a discharge system to reduce the work of secondary cleaning of the tank, reduce radioactive material contamination, and improve the safety of discharge operations.

[0066] To facilitate understanding of the technical solution of this application, the installation environment of the unloading interface device 100 in the embodiment of this application will be described first, such as... Figure 1 As shown, the unloading system includes an unloading well 10 and an unloading interface device 100, which connects the unloading well 10 and the tank 20. The unloading well 10 has a discharge port 11a penetrating the bottom wall 11 of the unloading well 10. The unloading well 10 includes a cover 12 movably connected to the bottom wall 11, which can open or close the discharge port 11a. The tank 20 has a receiving cavity 20a for receiving spent fuel M and an opening 20b communicating with the receiving cavity 20a. Thus, the unloading interface device 100 is installed at the discharge port 11a on the bottom wall 11 of the unloading well 10, and the tank 20 is connected to the unloading interface device 100 to establish an unloading channel Q, which facilitates the unloading operation, avoids radioactive contamination of the outer surface of the tank 20, and reduces the need for secondary cleaning of the tank 20.

[0067] See Figure 2 , Figure 2 A cross-sectional schematic diagram of the unloading interface device 100 in the installation environment according to an embodiment of this application is shown. The unloading interface device 100 provided in one embodiment of this application is used to connect between an unloading well 10 and a tank 20; the unloading well 10 has an unloading port 11a penetrating the bottom wall 11 of the unloading well 10, and the unloading well 10 includes a cover 12 movably connected to the bottom wall 11, the cover 12 being able to open or close the unloading port 11a; the tank 20 has a receiving cavity 20a for receiving spent fuel M and an opening 20b communicating with the receiving cavity 20a.

[0068] The unloading interface device 100 includes a main body 110, a first interface member 120, a second interface member 130, and a plurality of sealing members K1. The main body 110 is connected to the bottom wall 11 of the unloading well 10. The main body 110 has a first end N1 and a second end N2 disposed opposite to each other, and a channel Q passing through the first end N1 and the second end N2. The first end N1 is located at the unloading port 11a, and the second end N2 is located at the opening 20b. The channel Q connects the unloading port 11a and the opening 20b. The first interface member 120 is located at the first end N1, and the second interface member 130 is located at the second end N2. At least one of the plurality of sealing members K1 is located on the side of the first interface member 120 opposite to the second interface member 130, and at least another sealing member K1 is located on the side of the second interface member 130 opposite to the first interface member 120. When the cover 12 closes the discharge port 11a, at least one seal K1 is sealed between the first interface member 120 and the cover 12. When the second end N2 is located at the opening 20b, at least another seal K1 is sealed between the second interface member 130 and the tank 20.

[0069] The discharge well 10 refers to a well pool used for discharging spent fuel M. The discharge well 10 can be constructed of concrete or brick. The discharge well 10 contains clean water or other discharge solutions. The bottom wall 11 of the discharge well 10 can refer to the concrete floor slab of the discharge well 10. A discharge port 11a is cut into the bottom wall 11. The discharge port 11a is a channel Q for docking with the discharge interface device 100. The cover 12 is a component for closing or opening the discharge port 11a. For example, it can be a flange or other plate material, and its shape can be circular, elliptical, square, or other shapes, which are not limited in this embodiment. The cover 12 is movably connected to the bottom wall 11. The cover 12 can be driven to open or close the discharge port 11a by providing a drive mechanism. This drive mechanism can be a pneumatic mechanism or an electric mechanism.

[0070] Tank 20 is a container used to load spent fuel M. Generally, tank 20 containing spent fuel M is mounted on a transport vehicle and transported by the vehicle to directly below the unloading interface device 100, such as... Figure 1 As shown. The opening 20b of the tank body 20 has an abutment surface. For example, the abutment surface may be a stepped surface inside the opening 20b, or the surface of a flange provided at the edge of the opening 20b. When the second end N2 is provided at the opening 20b, the side surface of the second interface member 130 facing away from the first interface member 120 can abut against the abutment surface.

[0071] The main body 110 is a carrier for establishing the unloading channel Q. Channel Q refers to the channel used for transporting spent fuel M. Along the extension direction of the central axis of channel Q, the cross-sectional shape of channel Q can be circular, square, elliptical, or other shapes, which can be specifically selected according to actual needs; this embodiment does not impose any limitations on this. The first end N1 refers to the end of the main body 110 closest to the unloading port 11a. The second end N2 refers to the end of the main body 110 furthest from the unloading port 11a.

[0072] The first interface member 120 is a component for connecting to the discharge port 11a. When the discharge port 11a is closed by the cover 12, the first interface member 120 can abut against the cover 12. The second interface member 130 is a component for connecting to the opening 20b of the tank body 20. The side surface of the opening 20b of the tank body 20 near the second interface member 130 can be in contact with the bottom of the second interface member 130.

[0073] The sealing element K1 is a component used to seal the contact position. For example, the sealing element K1 can be a sealing ring, which can be circular, elliptical, square, or other shapes. The sealing ring can be made of an elastic material such as rubber, and this embodiment is not limited in this respect. Specifically, at least one sealing element K1 is installed on the surface of the first interface element 120 away from the second interface element 130, that is, at least one sealing element K1 is provided on the surface of the first interface element 120 near the cover 12. At least one sealing element K1 is provided on the surface of the second interface element 130 away from the first interface element 120, that is, at least one sealing element K1 is installed on the surface of the second interface element 130 near the opening 20b of the tank body 20.

[0074] Specifically, before the tank 20 is transported directly below the unloading interface device 100, or after unloading is completed, the cover 12 needs to be closed at the unloading port 11a. This can be achieved by sealing the first interface piece 120 and the cover 12 with the sealing element K1, thus sealing the bottom boundary of the unloading well 10. Furthermore, during the docking of the unloading interface device 100 with the tank 20, or during unloading, the second interface piece 130 located at the second end N2 is connected to the opening 20b of the tank 20. This can be achieved by sealing the second interface piece 130 with the opening 20b of the tank 20 with the sealing element K1. This reduces the risk of leakage of solutions carrying radioactive materials.

[0075] In this embodiment, the unloading interface device 100 can be installed on the bottom wall 11 of the unloading well 10. The unloading interface device 100 includes at least a main body 110, a first interface member 120, a second interface member 130, and multiple sealing members K1. The main body 110 has a through channel Q, so that the tank 20 containing spent fuel M can be unloaded by connecting it to the unloading port 11a on the bottom wall 11 of the unloading well 10 through the unloading interface device 100. By setting the sealing member K1 on the second interface member 130, the sealing member K1 can be sealed between the second interface member 130 and the opening 20b of the tank 20, thereby ensuring unloading... During the unloading process, the sealing effect is improved to reduce the possibility of radioactive material leakage. Furthermore, by setting a sealing element K1 in the first interface 120, the sealing element K1 can be sealed between the first interface 120 and the cover 12 of the unloading well 10. Thus, after unloading, the sealing effect of the cover 12 can be improved, reducing the risk of leakage of the unloading pool solution. In this way, with the help of the unloading interface device 100, the tank 20 containing spent fuel M can be safely docked to the outside of the unloading well 10 for unloading, reducing the need for secondary cleaning of the tank 20, reducing radioactive material contamination, and improving the safety of the unloading operation.

[0076] Please refer to Figure 3 In some embodiments, the first interface member 120 has an annular first groove (not shown in the figure) on the side surface opposite to the main body 110, and a corresponding sealing member K1 is installed in the first groove. The second interface member 130 has an annular second groove (not shown in the figure) on the side surface opposite to the main body 110, and a corresponding sealing member K1 is installed in the second groove.

[0077] For example, the first interface component 120 can be an annular flange, and its shape can be circular, elliptical, square, or other shapes, as long as it can be adapted to the diameter of the channel Q. This embodiment does not limit this. Specifically, an annular first groove (not shown in the figure) is formed on the surface of the first interface component 120 facing away from the main body 110, and a sealing element K1 of corresponding size is installed in the first groove. When the cover 12 is not in contact with the first interface component 120, the sealing element K1 protrudes from the surface of the first interface component 120 facing away from the main body 110, so that when the cover 12 comes into contact with the first interface component 120 by its own weight, the cover 12 can be pressed tightly against the first interface component 120, which can achieve a better sealing effect.

[0078] For example, the second interface component 130 includes a body 131, an upper flange (not shown in the figure), and a lower flange (not shown in the figure). The body is configured as a rotating structure around the central axis of the channel Q. Both the upper and lower flanges are annular flanges, which are fixed to both ends of the body. The upper flange is used to connect to the body 110, and the lower flange is used to connect to the opening 20b of the tank 20.

[0079] Specifically, an annular second groove (not shown in the figure) is formed on the side surface of the second interface piece 130 facing away from the main body 110 (i.e., the side surface of the lower flange). A sealing member K1 of corresponding size is installed in this second groove. When the second interface piece 130 is not in contact with the opening 20b of the tank body 20, the sealing member K1 protrudes from the side surface of the second interface piece 130 facing away from the main body 110. This facilitates the second interface piece 130 being pressed tightly against the opening 20b of the tank body 20 when it is in contact with the opening 20b of the tank body 20 and fixed by external fasteners (i.e., the second fixing member 150 mentioned later), thus achieving a better sealing effect.

[0080] In some embodiments, multiple first and second grooves are provided. A corresponding seal K1 is installed in each first groove, and a corresponding seal K1 is installed in each second groove.

[0081] For example, in this embodiment, two first grooves can be provided on the surface of the first interface member 120 facing away from the main body 110, and two second grooves can be provided on the surface of the second interface member 130 facing away from the main body 110. In other embodiments, three or four first grooves and two grooves can be provided, and the specific selection can be made according to actual needs. This embodiment does not impose any restrictions on this.

[0082] Thus, by setting up multi-level seals at the sealed joints, the risk of leakage of radioactive materials can be reduced.

[0083] Furthermore, the first groove and the second groove are arranged around the central axis of the channel Q. Specifically, both the first groove and the second groove are annular grooves arranged around the central axis of the channel Q. This reduces the possibility of gap leakage between the first interface member 120 and the cover 12, and between the second interface member 130 and the opening 20b of the tank 20, thereby improving the sealing performance of the connection.

[0084] Please continue to refer to Figure 3 In some embodiments, the unloading interface device 100 includes an inflation member K2. In the first interface member 120, a first through hole 120a is provided between at least two adjacent first grooves. In the second interface member 130, a second through hole (not shown) is provided between at least two adjacent second grooves. The air outlet of the inflation member K2 communicates with the first through hole 120a and / or the second through hole.

[0085] For example, multiple inflatable components K2 can be provided, and each inflatable component K2 can be an inflatable tube. In this embodiment, a first through hole 120a is provided between two first grooves in the first interface component 120, and the first through hole 120a can be connected to an inflatable tube. In the second interface component 130, a second through hole is provided between two second grooves, and the second through hole can be connected to an inflatable tube.

[0086] Furthermore, the unloading interface device also includes an inflation mechanism (not shown in the figure), which is connected to the inflation component K2. Alternatively, the unloading interface device also includes a pressure monitoring mechanism A, which is connected to the inflation component K2. Alternatively, the unloading interface device also includes a leak detection mechanism B, which is connected to the inflation component K2. Alternatively, the unloading interface device also includes a leak collection mechanism C, which is connected to the inflation component K2.

[0087] It should be noted that the inflation pipe can be connected to an external inflation mechanism and an air pressure detection mechanism A. When the cover 12 is sealed to the first interface 120, and / or the second interface 130 is sealed to the opening 20b of the tank 20, inflation can be performed between the two corresponding seals K1 via the inflation mechanism and the inflation pipe. This inflation pressure is greater than the hydraulic pressure (i.e., the hydraulic pressure in the unloading well 10). After inflation, the inflation detection mechanism monitors the air pressure between the two corresponding seals K1 in real time to promptly detect any potential leaks in the unloading well 10 or during the unloading process.

[0088] Furthermore, the leak detection mechanism B can detect in real time whether there is any leakage of the unloading medium between the two seals K1. If there is a leakage, the unloading medium can be collected by the leak collection mechanism C to reduce the leakage of radioactive materials, thereby improving the safety of the unloading well 10 and the safety of the unloading of spent fuel M.

[0089] Please continue to refer to Figure 2 In some embodiments, the second interface 130 has a guide section (i.e., body 131) that is partially configured to extend into the receiving cavity 20a via the opening 20b.

[0090] The guide section refers to the portion of the second interface member 130 that serves a guiding function. The second interface member 130 has a guide section, part of which is configured to extend into the receiving cavity 20a through the opening 20b. This facilitates the docking and fixing of the second interface member 130 with the opening 20b of the tank body 20.

[0091] Furthermore, along the extension direction of the central axis of channel Q, the closer to the opening 20b, the smaller the cross-sectional area of ​​the guide segment.

[0092] For example, the guide section (i.e., the body 131) of the second interface piece 130 can be a tapered flange. Along the extension direction of the central axis of the channel Q, the closer to the opening 20b of the tank 20, the smaller the cross-sectional area of ​​the portion of the guide section that extends into the receiving cavity 20a, thereby facilitating the adaptation of the second interface piece 130 to the opening 20b.

[0093] Alternatively, along the extension direction of the central axis of channel Q, the further away from the first interface 120, the smaller the cross-sectional area of ​​the guide segment.

[0094] For example, the guide section (i.e., body 131) of the second interface member 130 can be a combination of a tapered flange and a cylindrical flange. The further away from the first interface member 120 along the extension direction of the central axis of the channel Q, the smaller the cross-sectional area of ​​the portion of the guide section, thereby facilitating the fitting of the second interface member 130 with the opening 20b.

[0095] In some embodiments, the unloading interface device 100 further includes a first fixing member 140. The first interface member 120 can be fixedly connected to the bottom wall 11 of the unloading well 10 by means of the first fixing member 140.

[0096] Specifically, the first fixing member 140 is a component used to fix the main body 110 to the bottom wall 11 of the unloading well 10. The first fixing member 140 includes a rotating part 141, a first fixing part 142, a second fixing part 143, and a third fixing part 144. The first fixing part 142, the second fixing part 143, and the third fixing part 144 are respectively connected and fixed around the outer side wall of the rotating part 141. The rotating part 141 is connected to the first interface member 120. The first fixing part 142 and the second fixing part 143 are used to connect to the bottom wall 11 of the unloading well 10, and the third fixing part 144 is used to connect to the main body 110. The rotating part 141 is constructed as a rotating structure around the central axis of the channel Q. The first fixing part 142 and the second fixing part 143 can be constructed as annular reinforcing plates. The third fixing part 144 can be constructed as annular flanges. The first fixing member 140 also includes a plurality of first connecting portions 145, which are connected to the first fixing portion 142, the second fixing portion 143, and the third fixing portion 144. For example, the first connecting portions 145 may be bolts. Specifically, the annular circumferences of the first fixing portion 142, the second fixing portion 143, and the third fixing portion 144 are all fixed by the first connecting portions 145, and then anchored to the bottom wall 11 of the unloading well 10 by concrete.

[0097] Furthermore, the unloading interface device 100 also includes a second fixing member 150, which enables the second interface member 130 to be fixedly connected to the tank body 20. The second fixing member 150 can be constructed as an annular flange or other shapes, and can be selected according to actual needs; this embodiment does not impose any restrictions. This facilitates the fixed connection of the second interface member 130 to the opening 20b of the tank body 20.

[0098] Furthermore, the unloading interface device 100 also includes a connector 160. A third fastener 21 is fixed to the outer wall of the tank body 20. The connector 160 is connected to the third fastener 21 and the second fastener 150. Exemplarily, the connector 160 can be a bolt and a corresponding nut. The third fastener 21 can be welded to the outer wall of the tank body 20. The third fastener 21 can be constructed as an annular flange or other shaped structures, which can be specifically selected according to actual needs. This embodiment does not impose any limitations on this.

[0099] It should be noted that when the side surface of the second interface piece 130 near the opening 20b contacts the abutment surface at the opening 20b, the distance between the third fixing piece 21 and the second fixing piece 150 is reduced by the connector 160, thereby abutting the second interface piece 130 against the abutment surface at the opening 20b, and the third fixing piece 21 and the second fixing piece 150 are connected and fixed by the connector 160, thereby pre-tightening and fixing the second interface piece 130 and the tank body 20, which facilitates the subsequent unloading operation.

[0100] In some embodiments, the main body 110 includes a first segment 111 and a second segment 112 connected sequentially along the extension direction of the central axis of the channel Q. The end of the first segment 111 opposite to the second segment 112 is designated as a first end N1, and the end of the second segment 112 opposite to the first segment 111 is designated as a second end N2. The second segment 112 is configured such that, under the action of an external force, the first end N1 and the second end N2 tend to move away from each other. The direction in which the first end N1 and the second end N2 move away from each other is parallel to the extension direction of the central axis of the channel Q.

[0101] It should be noted that the first section 111 may refer to the supporting structure that is fixedly connected to the bottom wall 11 of the main body 110 and the tank 20, namely the rotating part 141. The second section 112 is used to form the main pressure-bearing boundary of the passage.

[0102] For example, the second segment 112 can be a sidewall of the main body 110, which has an expandable capability, or the second segment 112 can be a cylindrical bellows component. The specific choice can be made according to the actual situation, and this embodiment does not limit it. The structure of the second segment 112 of the main body 110 can be made of metal and has an expandable capability, which allows the first end N1 and the second end N2 to tend to move away from each other. Moreover, the direction in which the first end N1 and the second end N2 move away from each other is parallel to the extension direction of the central axis of the channel Q. That is, the second segment 112 has an axial displacement compensation capability. In this way, it is convenient to connect and fix the second interface piece 130 to the opening 20b of the tank 20 by pulling down with external force. Moreover, the second segment 112 of the main body 110 also has an axial displacement compensation capability when facing liquid pressure during the unloading process, which can improve the adaptability of the unloading interface device 100.

[0103] Furthermore, the first segment 111 and the second segment 112 can be fixedly connected, for example, by welding. Alternatively, the first segment 111 and the second segment 112 can be detachably connected by bolts, and two sealing elements K1 can be provided between the first segment 111 and the second segment 112. This facilitates the inspection of the sealing condition at the connection, so that any leakage can be detected in time.

[0104] In some embodiments, the second segment 112 is detachably connected to the second interface member 130, and two sealing elements K1 are provided between the second segment 112 and the second interface member 130. An annular flange is fixed to the second end N2 of the second segment 112, and the annular flange of the second end N2 is bolted to the upper flange of the second interface member 130. Alternatively, two sealing elements K1 can be provided on the annular flange of the second end N2 or on the upper flange of the second interface member 130.

[0105] It should be noted that in this embodiment, an inflation component K2 can be provided between any two adjacent sealing components K1, and an inflation mechanism, a pressure detection mechanism A, a leakage detection mechanism B, and a leakage collection mechanism C can be connected to the inflation component K2. The configuration and principle of the sealing components K1 and the inflation component K2 have been explained above, and will not be repeated here.

[0106] This facilitates the inspection of the sealing condition at the connection between the second section 112 and the second interface component 130, allowing for timely detection of leaks. Furthermore, the second section 112 and the second interface component 130 are detachably connected, allowing for the replacement of the appropriate second interface component 130 according to the size of the opening 20b of the tank 20.

[0107] In some embodiments, the unloading interface device 100 further includes an elastic element 170, which is configured as a rotating body about the central axis of the channel Q, and is sleeved on the outside of the second segment 112. The elastic element 170 is connected to the second interface member 130. It should be noted that in some embodiments, the elastic element 170 can be connected and fixed to the first segment 111 of the main body 110. In other embodiments, the elastic element 170 can be connected and fixed to the third fixing part 144 of the first fixing member 140. Specific choices can be made according to actual needs, and this embodiment does not limit this.

[0108] Thus, the elastic element 170 serves as a backup pressure-bearing boundary for channel Q, providing multi-layer protection and sealing, thereby enhancing the safety of the unloading interface device 100.

[0109] Furthermore, the elastic element 170 is configured to cause the second interface element 130 and the opening 20b to tend to move closer together under the action of an external force. Alternatively, under the same external force, the expansion deformation of the elastic element 170 is greater than the expansion deformation of the second segment 112 in the extension direction along the central axis of the channel Q. Alternatively, the elastic element 170 is configured to tend to expand in a direction perpendicular to and away from the central axis of the channel Q under the action of an external force.

[0110] Specifically, the elastic element 170 can be connected to the second interface element 130 via the second fixing element 150. A downward pulling force acts on the second fixing element 150, and the elastic element 170's expansion capability allows the second interface element 130 to approach the opening 20b. The elastic element 170 can be made of composite rubber, so that under the same downward pulling force, the expansion deformation of the elastic element 170 along the central axis of the channel Q is greater than the expansion deformation of the second segment 112, thus providing a redundant design.

[0111] Furthermore, the elastic element 170 has an arc-shaped structure, which allows it to tend to extend in a direction perpendicular to the central axis away from the channel Q. This satisfies the requirement that the unloading interface device 100 has the ability to compensate for displacement in the radial direction of the channel Q. Even under seismic conditions, if the unloading medium leaks from the main pressure-bearing boundary of the channel Q to the backup pressure-bearing boundary, the backup pressure-bearing boundary will be subjected to liquid pressure and can generate radial displacement compensation, thus providing redundancy space and improving the adaptability of the unloading interface device 100. Moreover, by setting the main pressure-bearing boundary and the backup pressure-bearing boundary, it can play a role in multi-layer protection and multi-layer sealing, thereby improving the safety of the unloading interface device 100.

[0112] In some embodiments, the second fastener 150 includes a fourth fastening portion 151 and a second connecting portion 152 connected to each other. The fourth fastening portion 151 is fixedly connected to the elastic member 170, and the second connecting portion 152 is coupled to the annular flange of the second end N2 and the upper flange of the second interface member 130.

[0113] For example, the fourth fixing part 151 can be an annular flange, and the second connecting part 152 can be a Z-shaped structure. Specifically, the fourth fixing part 151 has a fixing groove (not shown in the figure) on the side near the second interface member 130. Part of the second connecting part 152 can be accommodated in the fixing groove, and the other part of the second connecting part 152 can abut against the surface of the annular flange of the second end N2 near the second section 112, since the annular flange of the second end N2 is connected and fixed to the upper flange of the second interface member 130. Thus, when the fourth fixing part 151 is driven to connect with the third fixing member 21 of the tank body 20, the second interface member 130 can be driven to move toward the opening 20b of the tank body 20. Further, the fourth fixing part 151 is fixed to the third fixing member 21 of the tank body 20, so that the second interface member 130 abuts against the abutment surface at the opening 20b, completing the docking operation between the unloading interface device 100 and the tank body 20.

[0114] In some embodiments, the unloading interface device 100 further includes a first protective member 180, which is configured as a rotating body about the central axis of the channel Q; the first protective member 180 is fitted inside the body 110. In this way, the inner wall of the channel Q of the body 110 can be protected from contact with spent fuel M, and in particular, the radioactive material cleaning work on the second section 112 sidewall of the body 110 can be reduced.

[0115] In some embodiments, the unloading interface device 100 further includes a second protective member 190, wherein the first protective member 180 is configured as a rotating body about the central axis of the channel Q; the second protective member 190 is sleeved on the body 110.

[0116] Specifically, the second protective element 190 is fitted outside the elastic element 170, so as to keep the unloading interface device 100 clean and prevent dust, garbage and other debris from falling onto the outer wall of the elastic element 170.

[0117] In some embodiments, the discharge port device 100 further includes a replenishment pipe L1 communicating with the channel Q. When the cover 12 closes the discharge port 11a, the replenishment pipe can replenish the discharge medium into the channel Q to balance the pressure on both sides of the cover 12. Alternatively, when the cover 12 closes the discharge port 11a, the drain pipe L2 can discharge the discharge medium from the channel Q.

[0118] It should be noted that the unloading medium can be water, cleaning water or other unloading solutions, and this embodiment does not impose any restrictions on this.

[0119] Specifically, a through hole (not shown in the figure) can be made on the side wall of the first section 111 of the main body 110 to facilitate the passage of the outlet of the replenishment pipe L1. A through hole (not shown in the figure) can be made on the side wall of either the first section 111 or the second section 112 of the main body 110 to facilitate the passage of the outlet of the drain pipe L2. This is only required if the water level at the outlet of the replenishment pipe L1 is higher than the water level at the outlet of the drain pipe L2.

[0120] Furthermore, after the second interface piece 130 is connected and fixed to the opening 20b of the tank body 20, the cover 12 is still closed at the discharge port 11a. In order to carry out subsequent discharge work, the discharge medium can be added to the channel Q through the replenishment pipe L1 to balance the pressure on both sides of the cover 12. In this way, it is convenient to separate the cover 12 from the discharge port 11a.

[0121] Furthermore, after the spent fuel M in tank 20 is unloaded through the unloading interface device 100, the cover 12 is closed at the unloading port 11a. However, since there is still unloading medium in channel Q, it can be discharged through the drain pipe L2 into the unloading well 10 to reduce secondary pollution. In this way, tank 20 can be removed from below the unloading interface device 100.

[0122] Please refer to Figure 1 and Figure 2 Based on the same inventive concept, this application also provides a discharge system, including a discharge well 10 and a discharge interface device 100 as described in any of the foregoing embodiments. The discharge interface device 100 is used to connect between the discharge well 10 and the tank 20. The discharge well 10 has a discharge port 11a penetrating the bottom wall 11 of the discharge well 10. The discharge well 10 includes a cover 12 movably connected to the bottom wall 11. The cover 12 can open or close the discharge port 11a. The tank 20 has a receiving cavity 20a for receiving spent fuel M and an opening 20b communicating with the receiving cavity 20a.

[0123] The unloading system includes a closed channel Q and an open channel Q. In the closed channel Q state, the cover 12 closes the unloading port 11a, and at least one seal K1 is sealed between the first interface member 120 and the cover 12. In the open channel Q state, the cover 12 opens the unloading port 11a, and a second end N2 is located at the opening 20b; at least another seal K1 is connected between the second interface member 130 and the tank 20.

[0124] Specifically, before the tank 20 is transported directly below the unloading interface device 100, or after unloading is completed, the cover 12 must be closed at the unloading port 11a, meaning the unloading system is in the closed state of channel Q. The first interface piece 120 and the cover 12 can be sealed together using the sealing element K1, thus sealing the bottom boundary of the unloading well 10. Furthermore, during the docking of the unloading interface device 100 with the tank 20, or during unloading, i.e., when the unloading system is in the open state of channel Q, the second interface piece 130 located at the second end N2 is connected to the opening 20b of the tank 20. The second interface piece 130 and the opening 20b of the tank 20 can be sealed together using the sealing element K1. This reduces the risk of leakage of solutions carrying radioactive materials.

[0125] In some embodiments, the unloading system further includes a drive mechanism for driving the cover 12 to close or open the unloading port 11a. Specifically, the drive mechanism can be a pneumatic mechanism or an electric mechanism. Remotely operating the drive mechanism to drive the cover 12 to close or open the unloading port 11a improves the safety of the unloading operation.

[0126] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A discharge interface device, characterized in that, Used to connect the unloading well and the tank; the unloading well is provided with a cover that can open or close the unloading port of the unloading well, and the tank has a receiving cavity for receiving spent fuel and an opening communicating with the receiving cavity; The unloading interface device includes: The system comprises a main body, a first interface component, and a second interface component. The main body has a first end and a second end disposed opposite to each other, and a channel penetrating the first end and the second end. The first end is disposed at the discharge port, and the second end is disposed at the opening. The channel connects the discharge port and the opening. The first interface component is disposed at the first end, and the second interface component is disposed at the second end. Multiple seals, at least one of the seals being used to seal between the first interface and the cover that closes the discharge port, and at least another seal being used to seal between the second interface and the tank; The main body includes a first segment and a second segment connected sequentially along the extension direction of the central axis of the channel; The main body includes a first segment and a second segment connected sequentially along the central axis of the channel; the end of the first segment opposite to the second segment is the first end, and the end of the second segment opposite to the first segment is the second end; the second segment is configured such that the first end and the second end tend to move away from each other under the action of external force. The directions in which the first end and the second end move away from each other are parallel to the direction of extension of the central axis of the channel; The unloading interface device also includes an elastic element, which is constructed as a rotating body around the central axis of the channel and is sleeved on the outside of the second section; the elastic element is connected to the second interface component.

2. The unloading interface device according to claim 1, characterized in that, The first interface component has an annular first groove on the side surface opposite to the main body, and the corresponding sealing component is installed in the first groove; The second interface component has an annular second groove on the side surface opposite to the main body, and the corresponding sealing component is installed in the second groove.

3. The unloading interface device according to claim 2, characterized in that, Both the first groove and the second groove are provided in multiple ways; each of the first grooves is equipped with a corresponding sealing element, and each of the second grooves is equipped with a corresponding sealing element.

4. The unloading interface device according to claim 3, characterized in that, The first groove and the second groove are arranged around the central axis of the channel.

5. The unloading interface device according to claim 4, characterized in that, The unloading interface device includes an inflation component; In the first interface component, a first through hole is provided between at least two adjacent first grooves; in the second interface component, a second through hole is provided between at least two adjacent second grooves. The air outlet of the inflatable component is connected to the first through hole and / or the second through hole.

6. The unloading interface device according to claim 5, characterized in that, The unloading interface device further includes an inflation mechanism, which is connected to the inflation component; and / or The unloading interface device further includes a pressure monitoring mechanism, which is connected to the inflation component; and / or The unloading interface device further includes a leakage detection mechanism connected to the inflation component; and / or The unloading interface device also includes a leakage collection mechanism, which is connected to the inflation component.

7. The unloading interface device according to any one of claims 1-6, characterized in that, The second interface has a guide section, part of which is configured to extend into the receiving cavity via the opening.

8. The unloading interface device according to claim 7, characterized in that, Along the extension direction of the central axis of the channel, the closer to the opening, the smaller the cross-sectional area of ​​the guide segment.

9. The unloading interface device according to claim 1, characterized in that, The second segment is detachably connected to the second interface component, and at least one of the aforementioned seals is provided between the second segment and the second interface component.

10. The unloading interface device according to claim 1, characterized in that, The elastic element is configured such that, under the action of an external force, the second interface element and the opening tend to move closer to each other; and / or Under the same external force, along the extension direction of the central axis of the channel, the expansion deformation of the elastic element is greater than that of the second segment; and / or The elastic element is configured to tend to expand in a direction perpendicular to the central axis away from the channel under the action of external force.

11. The unloading interface device according to any one of claims 1-6, characterized in that, The discharge port device further includes a replenishment pipe communicating with the channel; when the cover closes the discharge port, the replenishment pipe can replenish the discharge medium into the channel to balance the pressure on both sides of the cover; and / or When the cover closes the discharge port, the drain pipe can discharge the discharge medium in the channel.

12. The unloading interface device according to any one of claims 1-6, characterized in that, The unloading interface device further includes a first fixing member; the first interface member can be fixedly connected to the unloading well by means of the first fixing member; and / or The unloading interface device also includes a second fixing member, which can be fixedly connected to the tank body by means of the second fixing member.

13. A discharge system, characterized in that, The system includes a discharge well and a discharge interface device as described in any one of claims 1-12; the discharge interface device is used to connect the discharge well and the tank body, the discharge well is provided with a cover capable of opening or closing the discharge port of the discharge well, and the tank body has a receiving cavity for receiving spent fuel and an opening communicating with the receiving cavity; The unloading system includes a closed channel state and a closed channel state; In the closed state of the channel, the cover closes the discharge port, and at least one of the sealing elements is sealed between the first interface element and the cover. When the channel is open, the cover opens the discharge port, and the second end is located at the opening. At least one other sealing element is connected between the second interface element and the tank.

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