Recovery system and method for nuclear reactor detector assembly

Abstract

The invention relates to a nuclear reactor detector assembly recovery system and method, and the system comprises a shielding transfer device which is used for pulling out a detector from a nuclear reactor and transferring the detector to a preset position; the coiling equipment is arranged on the guide rail assembly and driven by the lifting assembly to move below the liquid level of the component pool, and the coiling equipment is used for coiling part of the detector; and the dismantling platform is arranged at the pool opening of the component pool and used for bearing the hanging frame assembly, the shearing assembly and the clamping assembly. The working process of the shielding transfer equipment and the working process of the coiling equipment can be independently carried out, so that the shielding transfer equipment can work continuously, and the recovery working efficiency and the recovery convenience of the detector are improved; the corresponding detector is pulled out, released and coiled under the liquid level, shielding is carried out through the shielding transfer equipment in the transfer process, the problem that the radioactivity of the lower section of the detector is high is effectively solved, and the safety of the site construction environment is improved.

Description

Technical Field

[0001] The present application relates to the technical field of reactor equipment dismantling, and in particular to a nuclear reactor detector component recovery system and method. Background Art

[0002] The core measurement system includes core temperature measurement, core neutron injection rate measurement and pressure vessel water level measurement, directly providing reactor fuel assembly coolant outlet temperature information, core neutron injection rate distribution information and pressure vessel water level information. At present, the reactor core measurement system in the relevant technology adopts the form of an integrated component, integrating the detector into one, that is, inserting from the top cover of the reactor pressure vessel, sending the detector assembly into the fuel assembly to realize the measurement function.

[0003] During the operation of the reactor, the core measurement system integrated components are always located in the pressure vessel, and the bottom is always in the fuel assembly, which is greatly affected by irradiation for a long time. Since the core measurement system is designed to have a short service life, it cannot be guaranteed that it will not be replaced during the entire life cycle of the nuclear power plant. Therefore, during the refueling period, the detector integrated components that are close to the service life need to be removed and replaced.

[0004] According to the design of the guide tube of the core measurement system in the upper internal components and the depth limit of the component pool, the integrated detector assembly will inevitably be exposed to the water surface when it is completely pulled out and removed. The used integrated detector assembly is a highly radioactive object, and the radioactive dose distribution at different positions is uneven; during its operation, the dose in the part located in the fuel assembly is very high, and radiation protection must be considered during the removal process.

[0005] In the related art, the recovery method of the detector assembly includes using a dismantling device in the form of a large and small car structure, with the help of the shielding of the boric acid water layer, after the detector assembly is pulled out to a certain height above the upper internal components of the pile, the coiling operation is performed in situ. However, this recovery method has the following problems: the entire operation is carried out in a semi-enclosed cavity, and when the equipment fails, it is not easy to repair. Summary of the invention

[0006] Based on this, it is necessary to provide a nuclear reactor detector assembly recovery system and method to address the problem that the related technology adopts a recovery method in which the entire operation is carried out in a semi-enclosed cavity, which is inconvenient for maintenance when the equipment fails.

[0007] The embodiment of the present application first provides a nuclear reactor detector assembly recovery system, the nuclear reactor detector assembly recovery system comprising:

[0008] Shielded transport equipment, used to pull the detector out of the nuclear reactor and transport it to a preset location;

[0009] A coiling device, which is arranged on the guide rail assembly and is driven by the lifting assembly to move under the liquid surface of the component pool, and the coiling device is used to coil a part of the detector;

[0010] A dismantling platform is arranged at the pool mouth of the component pool, and is used to carry a hanger assembly, a shearing assembly and a clamping assembly. The hanger assembly is used to temporarily store the detector released by the shielding transfer equipment, the shearing assembly is used to shear the detector located at the preset position, and the clamping assembly is used to clamp the sheared part of the detector and move it to the coiling equipment.

[0011] In one embodiment, the nuclear reactor detector assembly recovery system further comprises:

[0012] The high-level container is arranged below the coiling device and below the liquid surface of the component pool, and is used to receive part of the detector after being coiled by the coiling device.

[0013] In one embodiment, the shielded transport device comprises:

[0014] A shielding tube body, wherein the shielding tube body has a tube cavity, and the tube cavity is used to accommodate the detector;

[0015] The transfer mechanism is used to drive the shielding tube body to move.

[0016] In one embodiment, the shielding transport device further comprises:

[0017] An extraction component is disposed in the lumen, and the lower end of the extraction component is used to be connected to the detector;

[0018] A hoisting assembly is arranged outside the shielding tube body, and the hoisting assembly is connected to the drawing assembly through a transmission bar;

[0019] A guide assembly is arranged at the upper end of the tube cavity and is used to wind the transmission bar so that the transmission bar enters the tube cavity from the winch assembly.

[0020] In one embodiment, the hoisting assembly includes a motor, the transmission bar includes a rope, and the motor is used to reel in or release the rope.

[0021] In one embodiment, the guide rail assembly includes a support platform and a track structure, and the support platform is fixed to the pool edge of the component pool;

[0022] The upper end of the track structure is connected to the support platform, and the lower end of the track structure abuts against the bottom of the component pool;

[0023] The lifting assembly is arranged on the supporting platform, and the lifting assembly is connected to the coiling device through a pulling bar to drive the coiling device to move up and down.

[0024] In one embodiment, the coiling device comprises:

[0025] A fixed plate, slidably connected to the guide rail assembly;

[0026] The movable plate is arranged on the fixed plate through a first slide rail,

[0027] A first driving part, disposed between the movable plate and the fixed plate, and used for driving the movable plate to move along a first direction;

[0028] A reel, the reel being used to coil up a portion of the detector;

[0029] The second driving part is arranged on the moving plate, the second driving part is connected to the end of the reel, and the second driving part is used for driving the reel to rotate.

[0030] In one embodiment, the coiling device further comprises:

[0031] a first baffle plate, arranged on the fixed plate through a second slide rail, the first baffle plate being located at an end of the reel;

[0032] The third driving unit is disposed on the fixed plate and connected to the first baffle. The third driving unit is used to drive the first baffle to move along the first direction so as to make the first baffle abut against the end of the roll or move away from the end of the roll.

[0033] In one embodiment, the coiling device further comprises:

[0034] A second baffle is fixed to the fixed plate, and the second baffle is spaced apart from the first baffle along the first direction. The second baffle is used to be sleeved on the reel so that when the reel moves in a direction away from the first baffle along with the movable plate, the part of the detector wound on the reel is separated from the reel.

[0035] In one embodiment, the coiling device further comprises:

[0036] A sliding plate, arranged on the fixed plate through a third sliding rail;

[0037] a fourth driving unit, disposed on the fixed plate, the fourth driving unit being connected to the sliding plate and configured to drive the sliding plate to reciprocate along the first direction;

[0038] A clamping assembly is arranged on the fixing plate, and the clamping assembly is used for clamping a part of the detector.

[0039] In one embodiment, the clamping assembly includes a first clamping roller, a second clamping roller and a fifth driving unit, the first clamping roller is fixed to the sliding plate, the fifth driving unit is arranged on the sliding plate, the output end of the fifth driving unit is connected to the second clamping roller, and the fifth driving unit is used to drive the second clamping roller to move along the first direction to approach or move away from the first clamping roller.

[0040] In one embodiment, the coiling device further comprises:

[0041] A support frame, wherein the support frame is disposed on the fixed plate through a fourth slide rail, and the support frame, the movable plate, and the sliding plate are arranged in sequence along a second direction, and the second direction intersects with the first direction;

[0042] a sixth driving unit, disposed between the fixing plate and the supporting frame, and configured to drive the supporting frame to move along the first direction;

[0043] The guide cylinder is arranged on the support frame through the fifth slide rail. The guide cylinder has an inlet and can move along the second direction under the drive of the seventh driving unit to receive part of the detector falling from the second baffle.

[0044] In one embodiment, the guide cylinder extends along the second direction, the guide cylinder also includes an outlet, and a cache plate is provided between the inlet and the outlet, the cache plate is used to switch between an open state and a closed state, in the open state, the inlet is connected to the outlet, in the closed state, the cache plate is used to cache a portion of the detector entering from the inlet.

[0045] In one embodiment, the demolition platform comprises:

[0046] A bridge component is arranged around the pool mouth of the component pool;

[0047] A plurality of maintenance platforms connected to the inner side of the bridge assembly in the circumferential direction and located above the component pool, for the maintenance and operation of shielded transfer equipment and lifting components;

[0048] A plurality of cage assemblies are connected to the inner side of the bridge assembly in the circumferential direction and are located above the component pool, and are used to disassemble the detector; the plurality of cage assemblies and the plurality of maintenance platforms are sequentially arranged at intervals around the circumference of the bridge assembly;

[0049] Wherein, the shearing assembly and the hanging bracket assembly are arranged on the bridge assembly.

[0050] In one of the embodiments, the upper stack component of the nuclear reactor is provided with a plurality of guide rods evenly arranged around the circumference of the component pool;

[0051] The demolition platform also includes a plurality of stabilizing platforms and a plurality of stabilizing components corresponding one by one to the plurality of guide rods;

[0052] The stabilizing platform is connected to the inner side of the bridge component in the circumferential direction and is located above the component pool. The stabilizing component is arranged on the corresponding stabilizing platform. One end of the stabilizing component extending into the component pool is connected to one of the guide rods.

[0053] The embodiment of the present application also provides a detector assembly recovery method, which is applied to the nuclear reactor detector assembly recovery system described in the above embodiment, and the recovery method includes:

[0054] Install the shielding transfer equipment, guide rail assembly, lifting assembly, coiling equipment, dismantling platform, rack assembly, shearing assembly and clamping assembly at corresponding positions of the component pool respectively;

[0055] Controlling the shielding transfer device to extend below the liquid surface of the component pool, and pulling out the detector and lifting it into the shielding tube body;

[0056] Controlling the shielding transfer device to move out of the liquid surface of the component pool, move to the hanger assembly of the dismantling platform, and extend it under the liquid surface of the component pool again, while releasing the detector;

[0057] The detector is hung on the bracket assembly, and the detector is cut to separate the detector into an upper detector and a lower detector;

[0058] The coiling device is used to coil the lower detector, and the high-level container is controlled to receive the coiled lower detector.

[0059] In one embodiment, the step of installing the demolition platform at the component pool includes:

[0060] The bridge assembly is enclosed at the pool mouth of the component pool, and a plurality of maintenance platforms and a plurality of cage assemblies are connected to the bridge assembly;

[0061] The plurality of stabilizing components on the dismantling platform are connected one by one with the plurality of guide rods on the upper stack member of the nuclear reactor.

[0062] In one embodiment, the step of controlling the shielding transfer device to extend below the liquid surface of the component pool and pulling out the detector and lifting it into the shielding tube body comprises:

[0063] Remove the protective shell on the top of the detector and install the fixture;

[0064] The shielding tube body is driven to the top of the detector to be pulled out by the transfer mechanism, and the extraction assembly is reinforced and connected with the clamp;

[0065] The shielding tube body is driven to enter below the liquid surface, and the winch assembly is started to drive the transmission bar to lift the extraction assembly until the detector completely enters the shielding tube body.

[0066] In one embodiment, the step of controlling the shielding transfer device to move out of the liquid surface of the component pool, move to the hanger assembly of the dismantling platform, and extend it under the liquid surface of the component pool again, and release the detector at the same time includes:

[0067] The shielding tube body is driven to move out of the water surface and to the hanger assembly by the transfer mechanism;

[0068] Driving the shielding transfer device to enter the liquid surface again, and simultaneously starting the hoisting assembly to release the transmission bar, so that the detector is separated from the shielding tube body;

[0069] The shielding transfer device is driven to rise, the extraction assembly and the clamp are removed, and the clamp is hung on the hanger assembly.

[0070] In one embodiment, the step of using a coiling device to coil the lower detector comprises:

[0071] The lower section detector cut off is transferred to the clamping assembly by the clamping assembly, and the end of the lower section detector is extended between the first baffle and the reel, and the first baffle is driven to approach the reel by the third driving unit to clamp the lower section detector;

[0072] The second driving part is started to drive the winding drum to rotate, so as to wind the lower section detector on the winding drum, and after winding a preset number of turns, the winding device is controlled to move downward by a preset distance as a whole;

[0073] After the reel cooperates with the clamping assembly to wind up the lower detector, the clamping assembly moves to avoid the winding.

[0074] The guide cylinder is driven by the seventh driving unit and is located between the first baffle and the second baffle to control the reel to move away from the second baffle. The guide cylinder receives the lower detector that falls off from under the reel and transports the lower detector into the high-level container.

[0075] In the above-mentioned nuclear reactor detector component recovery system and method, the shielding and transporting equipment is used to pull out and transport the detector to a preset position, and can be temporarily stored in the rack assembly. The coiling equipment coils the lower section of the sheared detector to reduce its volume. The operation processes of the shielding and transporting equipment and the coiling equipment can be carried out independently, so that the shielding and transporting equipment can operate continuously, thereby increasing the efficiency of detector recovery and the convenience of recovery; and the extraction, release and coiling of the corresponding detector are all carried out below the liquid surface, and the shielding and transporting equipment is used to shield the detector during the transportation process, which effectively solves the problem of high radioactivity in the lower section of the detector and improves the safety of the on-site construction environment. In addition, by establishing a dismantling platform on the component pool, it is convenient for manual debugging of the shielding and transporting equipment, coiling equipment, etc., emergency maintenance and other operations, making the installation and debugging of the entire recovery system more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 This is a schematic diagram of the overall structure of a nuclear reactor detector assembly recovery system provided according to some embodiments of the present application.

[0077] Figure 2 This is a schematic diagram of the overall structure of a shielded transport device provided according to some embodiments of the present application.

[0078] Figure 3 It is a schematic diagram of a partial cross-sectional structure of a shielded transport device provided according to some embodiments of the present application.

[0079] Figure 4 This is a schematic diagram of the structure of a winch assembly provided according to some embodiments of the present application.

[0080] Figure 5 This is a schematic diagram of the structure of a guide assembly provided according to some embodiments of the present application.

[0081] Figure 6 This is a schematic diagram of the structure of a guide rail assembly provided according to some embodiments of the present application.

[0082] Figure 7 This is a schematic diagram of the structure of a support platform provided according to some embodiments of the present application.

[0083] Figure 8 This is a schematic diagram of the structure between the guide rail assembly, the coiling device, the lifting assembly and the high-level container provided according to some embodiments of the present application.

[0084] Fig. 9 This is a schematic diagram of the structure between the guide rail assembly, the coiling device and the lifting assembly provided according to some embodiments of the present application.

[0085] Fig.10 This is a schematic diagram of the structure of a lifting assembly provided according to some embodiments of the present application.

[0086] Fig.11 This is a schematic diagram of the overall structure of a coiling device provided according to some embodiments of the present application.

[0087] Fig.12 This is a schematic diagram of the front view of the coiling device provided according to some embodiments of the present application.

[0088] Fig.13 This is one of the partial structural schematic diagrams of the coiling equipment provided according to some embodiments of the present application.

[0089] Fig.14 This is the second partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application.

[0090] Fig.15 This is the third partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application.

[0091] Fig.16 This is the fourth partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application.

[0092] Fig.17 This is a schematic diagram of the back structure of a coiling device provided according to some embodiments of the present application.

[0093] Fig.18 This is a schematic diagram of the overall structure of a dismantling platform provided according to some embodiments of the present application.

[0094] Fig.19 This is a schematic structural diagram of a dismantling platform from another perspective provided according to some embodiments of the present application.

[0095] Fig. 20 A schematic flow chart of a method for recovering a detector assembly according to some embodiments of the present application.

[0096] Figure Number:

[0097] 100, shielding transfer equipment; 110, shielding pipe body; 111, pipe cavity; 120, extraction assembly; 130, hoisting assembly; 140, guide assembly;

[0098] 200, guide rail assembly; 210, support platform; 220, track structure;

[0099] 300, coiling device; 310, fixed plate; 311, guide wheel; 320, movable plate; 325, first slide rail; 326, first drive unit; 321, reel; 322, second drive unit; 331, first baffle; 334, second slide rail; 332, third drive unit; 333, second baffle; 340, sliding plate; 343, third slide rail; 341, fourth drive unit; 342, clamping assembly; 3421, first clamping roller; 3422, second clamping roller; 3423, fifth drive unit; 350, support frame; 353, fourth slide rail; 351, sixth drive unit; 352, guide cylinder; 3521, inlet; 3522, outlet; 356, seventh drive unit; 354, buffer plate;

[0100] 400, demolition platform; 410, bridge assembly; 420, maintenance platform; 430, cage assembly; 440, stabilization platform; 441, stabilization assembly;

[0101] 500, lifting components;

[0102] 600, upper stack member; 610, guide rod;

[0103] 700, component pool;

[0104] 800. High-level container. DETAILED DESCRIPTION

[0105] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0106] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application.

[0107] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0108] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0109] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0110] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, 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 implementation method.

[0111] See also Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a nuclear reactor detector assembly recovery system provided according to some embodiments of the present application. The nuclear reactor detector assembly recovery system provided in one embodiment of the present application may include a shielding transfer device 100, a coiling device 300 and a dismantling platform 400.

[0112] The shielding and transporting equipment 100 is used to pull out the detector from the nuclear reactor and transport it to a preset position; the coiling equipment 300 is arranged on the guide rail assembly 200, and is driven by the lifting assembly 500 to move under the liquid surface of the component pool 700, and the coiling equipment 300 is used to coil part of the detector; the dismantling platform 400 is arranged at the pool mouth of the component pool 700, and the dismantling platform 400 is used to carry the hanger assembly, the shearing assembly and the clamping assembly. The hanger assembly is used to temporarily store the detector released by the shielding and transporting equipment 100, the shearing assembly is used to shear the detector located at the preset position, and the clamping assembly is used to clamp the sheared part of the detector and move it to the coiling equipment 300.

[0113] It is understandable that when the detector is working, the lower section of the detector is inserted into the nuclear reactor fuel assembly. The upper section of the detector is farther away from the fuel assembly than the lower section of the detector. Since the reactor pressure vessel is radioactive, the detector will be contaminated and thus also radioactive. Since the upper section of the detector is far away from the fuel assembly, the radioactivity of the lower section of the detector is higher than that of the upper section of the detector. Therefore, when the detector is recovered, the lower section of the detector and the upper section of the detector are generally recovered separately.

[0114] The upper section of the detector can be stored elsewhere for recycling due to its low radioactivity. The lower section of the detector can be recycled after the coiling device 300 coils up the detector to reduce its volume.

[0115] In order to facilitate walking and operation by manual labor, the dismantling platform 400 is arranged above the component pool 700, and an area corresponding to the detector below is reserved in the middle of the dismantling platform 400, so that the shielding and transporting equipment 100 can extract the detector from this area. The shielding and transporting equipment 100 can move in all directions above the component pool 700 through the lifting equipment (ring lifting). When the shielding and transporting equipment 100 enters the component pool 700 below the liquid surface to pull out the detector from the nuclear reactor, that is, after the detector is completely placed in the shielding and transporting equipment 100, the shielding and transporting equipment 100 is separated from the liquid surface, and reaches the position of the rack assembly after crossing the dismantling platform 400. Of course, in order to facilitate the coiling device 300 to coil the detector, the rack assembly is usually arranged on one side of the coiling device 300.

[0116] Next, the shielded transfer device 100 enters under the liquid surface, and while releasing the detector, the shielded transfer device 100 is lifted upward until the top of the detector is exposed above the water surface. The detector can be hung on the hanger assembly by manual or robotic arm operation to facilitate subsequent cutting and coiling operations on the detector.

[0117] In the above-mentioned process of transporting the detector, since the detector is contaminated and radioactive, the extraction and release processes of the detector are all carried out underwater, and the detector can be isolated from the external environment by shielding the detector during the transportation process. Since the lower section of the detector is located in the fuel assembly during operation, the lower section of the detector is the most contaminated and thus has the highest radioactivity. The upper section of the detector is far away from the core, so the closer to the upper end of the detector, the lower the radioactivity. Since the detector is long enough, the end of the detector away from the core has low radioactivity, and the upper end of the detector can be extended out of the water for easy operation by staff.

[0118] The coiling device 300 is usually arranged at the side wall of the component pool 700. In order to facilitate the up and down movement of the coiling device 300, a guide rail assembly 200 is arranged at the edge of the component pool 700. A lifting assembly 500 is also arranged at the upper end of the guide rail assembly 200, that is, the edge of the pool. The lifting assembly 500 is connected to the coiling device 300 and can drive the coiling device 300 to rise or fall along the guide rail assembly 200.

[0119] The detector placed at the hanger assembly can be cut by the shearing assembly, thereby being divided into an upper detector and a lower detector. It can be understood that the diameters of the detectors are different at the top and bottom, and the diameter of the lower detector is smaller than that of the upper detector. The diameter of the lower detector is usually 7.5 mm. Therefore, the shearing position of the shearing assembly can be the connection of different diameters of the detectors. The sheared lower detector can be clamped by the clamping assembly so as to be moved to the coiling device 300 for coiling. Since the radioactivity of the lower detector is relatively high, the coiling device 300 is also arranged below the liquid surface, and the lower detector is coiled below the liquid surface.

[0120] In this example, the detectors after transport are temporarily stored at the hanging component, so that the shielding transport device 100 and the coiling device 300 can work independently, thereby increasing the efficiency and convenience of recycling the detectors.

[0121] It should be noted that the detector transported by the shielding transport device 100 can be directly transported to the coiling device 300 after being cut and clamped, that is, without passing through the rack assembly. In addition, the above-mentioned operations of the cutting assembly and the clamping assembly can be performed automatically by the equipment or manually by a person standing at the dismantling platform 400, and no specific restrictions are made here.

[0122] In the present application, the shielding and transporting device 100 is used to pull out and transport the detector to a preset position, and can be temporarily stored in the rack assembly. The coiling device 300 coils the lower section of the sheared detector to reduce the volume. The operation process of the shielding and transporting device 100 and the coiling device 300 can be carried out independently, so that the shielding and transporting device 100 can operate continuously, thereby increasing the efficiency of the detector recovery work and the convenience of recovery; and the corresponding detector is pulled out, released and coiled under the liquid surface, and the shielding and transporting device 100 is used for shielding during the transportation process, which effectively solves the problem of high radioactivity in the lower section of the detector and improves the safety of the on-site construction environment. In addition, by establishing a dismantling platform 400 on the component pool 700, it is convenient for manual debugging of the shielding and transporting device 100, the coiling device 300, etc., emergency maintenance and other operations, making the installation and debugging of the entire recovery system more convenient and quick.

[0123] Next, we will combine the attached Figure 1 -Attached Fig.19 The specific structure of the nuclear reactor detector assembly recovery system provided in the embodiment of the present application is introduced.

[0124] Figure 8 The schematic diagram is a structural diagram of a guide rail assembly, a coiling device, a lifting assembly and a high-level container according to some embodiments of the present application. Figure 8 As shown, in some embodiments, the nuclear reactor detector assembly recovery system also includes a high-level container 800, which is arranged below the coiling device 300 and below the liquid surface of the component pool 700, and is used to receive part of the detector after being coiled by the coiling device 300.

[0125] Specifically, the high-level container 800 is arranged below the liquid surface, which can also be understood as being placed at the bottom of the component pool 700, or at a safe underwater depth. The high-level container 800 is used to store the lower section detector after coiling. The whole can be welded with stainless steel, and is mainly composed of an upper pipe seat, a cylinder, a lower pipe seat and a high-level container cover. The high-level container cover is provided with a plurality of pin holes, so that the high-level container 800 can be opened or closed by cooperating with the pin holes through an external long rod assembly.

[0126] A grid may be provided at the guide rail assembly 200 to place and stabilize the high-level container 800. A plurality of high-level containers 800 may be provided below the coiling device 300, so that after one of the high-level containers 800 is filled with the lower-level detector, the lower-level detector may be placed in another high-level container 800, thereby maintaining the working continuity of the coiling device 300 and further improving the working efficiency of the entire recovery system.

[0127] Combination Figures 2 to 5 As shown, Figure 2This is a schematic diagram of the overall structure of a shielded transport device provided according to some embodiments of the present application. Figure 3 It is a schematic diagram of a partial cross-sectional structure of a shielded transport device provided according to some embodiments of the present application. Figure 4 This is a schematic diagram of the structure of a winch assembly provided according to some embodiments of the present application. Figure 5 Schematic diagram of the structure of the guide assembly provided according to some embodiments of the present application. In some embodiments, the shielding transport device 100 may include a shielding tube body 110 and a transfer mechanism. The shielding tube body 110 has a lumen 111, and the lumen 111 is used to accommodate the detector; the transfer mechanism is used to drive the shielding tube body 110 to move.

[0128] Specifically, the transfer mechanism can be understood as a lifting device, such as a ring crane, to drive the shielding transfer device 100 to move and transfer above the component pool 700.

[0129] The shielding tube 110 includes an upper part and a lower part, the upper part and the lower part are fixedly connected, and the inner diameters of the upper part and the lower part are the same. The outer diameter of the lower part of the shielding tube 110 is greater than the outer diameter of the upper part of the shielding body, so that the wall thickness of the lower part is greater than the wall thickness of the upper part. From the above, it can be seen that the radioactivity of the lower section of the detector is stronger than that of the upper section of the detector. When the detector is transported, the lower section of the detector is located in the lower part of the shielding tube 110, and the upper section of the detector is located in the upper part of the shielding tube 110. Therefore, the wall thickness of the lower part of the shielding tube 110 is greater than the wall thickness of the upper part of the shielding tube 110, which can more reliably shield the radioactivity of the lower section of the detector, making it safer and more reliable.

[0130] like Figure 3 As shown, in some embodiments, the shielding transport device 100 may further include a drawing assembly 120, a hoisting assembly 130, and a guide assembly 140. The drawing assembly 120 is disposed in the lumen 111, and the lower end of the drawing assembly 120 is used to connect with the detector; the hoisting assembly 130 is disposed outside the shielding tube body 110, and the hoisting assembly 130 is connected to the drawing assembly 120 through a transmission bar; the guide assembly 140 is disposed at the upper end of the lumen 111, and is used to wind the transmission bar so that the transmission bar enters the lumen 111 from the hoisting assembly 130.

[0131] Specifically, the extraction assembly 120 includes a counterweight and a lifting ring embedded in the tube cavity 111 of the shielding tube body 110, and the lifting ring is used to connect with the detector. The hoisting assembly 130 is arranged at the connection between the upper half and the lower half of the shielding tube body 110, and includes a hoist, and a rotating drum on the hoist is wound with one end of a transmission bar, and the other end of the transmission bar is wound at the guide assembly 140 and connected to the end of the counterweight.

[0132] During use, the transmission bar is released by the winch, and the lifting ring is exposed from the lower end of the shielding tube body 110 under the gravity of the counterweight block, so that the detector can be installed on the lifting ring or removed from the lifting ring manually or by a mechanical arm. When the winch is retracted, the transmission bar can pull the counterweight block up, so that the detector can be lifted into the shielding tube body 110.

[0133] In one example, the hoisting assembly 130 includes a motor, the transmission bar includes a rope, and the motor is used to reel in or release the rope. Specifically, the transmission bar can be a steel wire or a chain, and the guide assembly 140 can be a fixed pulley.

[0134] Combination Figure 6 , Figure 7 and Fig. 9 As shown, Figure 6 This is a schematic diagram of the structure of a guide rail assembly provided according to some embodiments of the present application. Figure 7 This is a schematic diagram of the structure of a support platform provided according to some embodiments of the present application. Fig. 9 The schematic diagram of the structure between the guide rail assembly, the coiling device and the lifting assembly provided according to some embodiments of the present application. In some embodiments, the guide rail assembly 200 includes a support platform 210 and a track structure 220, the support platform 210 is fixed to the pool edge of the component pool 700; the upper end of the track structure 220 is connected to the support platform 210, and the lower end of the track structure 220 is abutted against the pool bottom of the component pool 700; the lifting assembly 500 is arranged on the support platform 210, and the lifting assembly 500 is connected to the coiling device 300 through a pulling bar to drive the coiling device 300 to move up and down.

[0135] Specifically, the support platform 210 is arranged at the pool edge of the component pool 700, and has a bearing surface for bearing the track structure 220. The track structure 220 can be split into multiple sections for installation, but there is no specific restriction. The setting of the support platform 210 is not only convenient for connecting the track structure 220, but also convenient for setting the lifting assembly 500. Of course, the lifting assembly 500 can also be arranged above the support platform 210, but fixedly connected to the pool edge of the component pool 700. The lifting assembly 500 can also be understood as a winch, which is connected to the coiling device 300 through a pulling bar (such as a steel wire, a chain, etc.) to realize the rise or fall of the coiling device 300 on the track structure 220.

[0136] Fig.11 This is a schematic diagram of the overall structure of a coiling device provided according to some embodiments of the present application. Fig.12 This is a schematic diagram of the front view of the coiling device provided according to some embodiments of the present application. Fig.13 This is one of the partial structural schematic diagrams of the coiling equipment provided according to some embodiments of the present application. Fig.14 This is the second partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application. Fig.15 This is the third partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application. Fig.16 This is the fourth partial structural schematic diagram of the coiling equipment provided according to some embodiments of the present application. Fig.17 This is a schematic diagram of the back structure of a coiling device provided according to some embodiments of the present application.

[0137] like Fig.11 , Fig.13 As shown, in some embodiments, the coiling device 300 may include a fixed plate 310, a movable plate 320, a first driving part 326, a reel 321, and a second driving part 322. The fixed plate 310 is slidably connected to the guide rail assembly 200; the movable plate 320 is disposed on the fixed plate 310 through a first slide rail 325, the first driving part 326 is disposed between the movable plate 320 and the fixed plate 310, and is used to drive the movable plate 320 to move along a first direction; the reel 321 is used to coil a partial detector; the second driving part 322 is disposed on the movable plate 320, the second driving part 322 is connected to the end of the reel 321, and the second driving part 322 is used to drive the reel 321 to rotate.

[0138] Specifically, a plurality of guide wheels 311 are provided on the back of the fixed plate 310 to contact the track structure 220, so as to facilitate the fixed plate 310 to move up and down along the track structure 220 driven by the pulling bar. The front of the fixed plate 310 may be composed of four major parts, and the first major part may be the part that makes the lower detector bend. The first driving part 326 may include a telescopic motor, so as to drive the movable plate 320 to move in a first direction (horizontal direction) relative to the fixed plate 310; the second driving part 322 includes a motor and a reducer, and the output end of the reducer is connected to a reel 321, that is, the axial direction of the reel 321 is along the first direction, and the rotation of the reel 321 can coil the lower detector (spring-like), thereby reducing the volume of the detector, so as to facilitate the recovery of the high-level container 800.

[0139] The second part can be, for example Fig.14 As shown, in some embodiments, the coiling device 300 also includes a first baffle 331, which is arranged on the fixed plate 310 through a second slide rail 334, and the first baffle 331 is located at the end of the reel 321; a third driving unit 332 is arranged on the fixed plate 310 and connected to the first baffle 331, and the third driving unit 332 is used to drive the first baffle 331 to move along the first direction to make the first baffle 331 abut against the end of the reel 321, or away from the end of the reel 321.

[0140] Specifically, a notch may be provided at the end of the reel 321 facing the first baffle 331, and the notch is used for the end of the lower detector to enter. Before the lower detector is wound around the reel 321, the third driving unit 332 drives the first baffle 331 to move to the side away from the reel 321, so that the end of the lower detector can enter the notch of the reel 321. Then, the third driving unit 332 drives the first baffle 331 to move to the side close to the reel 321, so as to cooperate with the reel 321 to clamp the end of the lower detector. When the reel 321 rotates, the rest of the lower detector can rotate on the reel 321.

[0141] The above-mentioned second part may also include, in some embodiments, the winding device 300 also includes a second baffle 333, which is fixed to the fixed plate 310, and the second baffle 333 and the first baffle 331 are spaced apart along the first direction, and the second baffle 333 is used to be sleeved on the reel 321, so that when the reel 321 moves with the movable plate 320 in the direction away from the first baffle 331, part of the detector wound on the reel 321 is separated from the reel 321.

[0142] Specifically, the second baffle 333 is mainly provided to push the lower detector from the drum 321 after the winding is completed. The specific process may be that the first driving part 326 drives the drum 321 on the movable plate 320 to move in the direction away from the first baffle 331. During the movement, the drum 321 can pass through the through hole on the second baffle 333, while the wound lower detector is blocked by the second baffle 333, that is, the wound lower detector is separated from the drum 321 so as to fall into the high-pressure container 800 below.

[0143] The third part can be, for example, Fig.15 As shown, in some embodiments, the coiling device 300 further includes a sliding plate 340, a fourth driving part 341 and a clamping assembly 342. The sliding plate 340 is disposed on the fixed plate 310 through a third slide rail 343; the fourth driving part 341 is disposed on the fixed plate 310, and the fourth driving part 341 is connected to the sliding plate 340, and is used to drive the sliding plate 340 to reciprocate along the first direction; the clamping assembly 342 is disposed on the fixed plate 310, and the clamping assembly 342 is used to clamp part of the detector.

[0144] Specifically, the clamping assembly 342 can exert a restraining force on the lower detector, which can play a guiding role on the one hand, so that the lower detector can be wound on the reel 321. On the other hand, the restraining force exerted by the clamping assembly 342 cooperates with the winding of the reel 321, so that the lower detector can be regularly wound on the reel 321, thereby improving the winding size accuracy of the lower detector and facilitating the subsequent storage of the high-pressure container 800. The fourth driving part 341 is not only capable of driving the clamping assembly 342 to move along with the winding process of the reel 321, that is, making the clamped lower detector correspond to the winding position of the reel 321; moreover, the fourth driving part 341 is also used to drive the sliding plate 340 and the clamping assembly 342 thereon to avoid, that is, when the wound lower detector falls from above, it provides a guarantee for its accurate falling.

[0145] The specific structure of the clamping assembly 342 can be as follows: Fig.13 , Fig.15 As shown, in some embodiments, the clamping assembly 342 includes a first clamping roller 3421, a second clamping roller 3422 and a fifth driving unit 3423, the first clamping roller 3421 is fixed to the sliding plate 340, the fifth driving unit 3423 is arranged on the sliding plate 340, the output end of the fifth driving unit 3423 is connected to the second clamping roller 3422, and the fifth driving unit 3423 is used to drive the second clamping roller 3422 to move along the first direction to approach or move away from the first clamping roller 3421.

[0146] Specifically, the first clamping roller 3421 and the second clamping roller 3422 are provided with a plurality of guide grooves, and the movement of the lower section detector can be limited by clamping the lower section detector by the first clamping roller 3421 and the second clamping roller 3422. The use process may be that in the initial state, the first clamping roller 3421 and the second clamping roller 3422 are separately provided, and when the clamping assembly carries the lower section detector to between the first clamping roller 3421 and the second clamping roller 3422, the second clamping roller 3422 is driven to move by the fifth driving part 3423 until the second clamping roller 3422 cooperates with the first clamping roller 3421 to effectively clamp the lower section detector.

[0147] It should be noted that the clamping of the lower detector by the first clamping roller 3421 and the second clamping roller 3422 only applies a certain restraining force, and it is also necessary to ensure that the lower detector can move between the first clamping roller 3421 and the second clamping roller 3422 so that the upper reel 321 can wind up the lower detector.

[0148] The fourth part can be, for example Fig.16As shown, in some embodiments, the coiling device 300 further includes a support frame 350, a sixth driving part 351 and a guide cylinder 352. The support frame 350 is arranged on the fixed plate 310 through the fourth slide rail 353, and the support frame 350, the movable plate 320 and the sliding plate 340 are arranged in sequence along the second direction, and the second direction intersects with the first direction; the sixth driving part 351 is arranged between the fixed plate 310 and the support frame 350, and is used to drive the support frame 350 to move along the first direction; the guide cylinder 352 is arranged on the support frame 350 through the fifth slide rail, and the guide cylinder 352 has an inlet 3521, which can be driven by the seventh driving part 356 to move along the second direction to receive part of the detector falling from the second baffle 333.

[0149] Specifically, since the position of the high-level container 800 is relatively fixed and the number is large, not all high-level containers 800 are located at the falling position of the lower detector after winding. Based on this, a guide cylinder 352 is arranged below the falling position, and the guide cylinder 352 can move along the second direction (vertical direction) under the drive of the seventh driving part 356. After the winding of the lower detector is completed and the upper clamping assembly 342 is avoided, the guide cylinder 352 is driven by the seventh driving part 356 to the falling position close to the lower detector (close to the space between the first baffle 331 and the second baffle 333) to receive the lower detector after winding.

[0150] In some embodiments, the guide cylinder 352 extends along the second direction, and the guide cylinder 352 also includes an outlet 3522, and a cache plate 354 is arranged between the inlet 3521 and the outlet 3522, and the cache plate 354 is used to switch between an open state and a closed state. In the open state, the inlet 3521 is connected to the outlet 3522, and in the closed state, the cache plate 354 is used to cache part of the detector entering from the inlet 3521.

[0151] Specifically, the guide cylinder 352 needs to transport the received coiled lower detector to the corresponding high-level container 800, that is, the guide cylinder 352 is moved downward and horizontally by controlling the seventh drive unit 356 and the sixth drive unit 351. During this process, the guide cylinder 352 needs to carry the lower detector to move. Therefore, a buffer plate 354 needs to be provided in the guide cylinder 352. During the movement of the guide cylinder 352, the buffer plate 354 is in a closed state, so that the lower detector can be continuously located in the guide cylinder 352. When the guide cylinder 352 is moved into place, that is, aligned with the high-level container 800, the motor connected to the buffer plate 354 can be controlled to drive the buffer plate 354 to open, so that the lower detector located at the buffer plate 354 slides out from the outlet 3522 of the guide cylinder 352 and falls into the high-level container 800.

[0152] At this point, the structure of the winding device 300 has been basically introduced. It should be noted that when the winding device 300 starts to wind the lower section detector, after winding a preset number of circles, the winding device 300 can be driven downward to be at a safe underwater depth position. While ensuring safe winding, it also avoids the bottom of the longer lower section detector from interfering with the bottom of the pool.

[0153] Combination Fig.18 and Fig.19 As shown, Fig.18 This is a schematic diagram of the overall structure of a dismantling platform provided according to some embodiments of the present application. Fig.19 A schematic diagram of the structure of a demolition platform from another perspective provided according to some embodiments of the present application. In some embodiments, the demolition platform 400 includes a bridge assembly 410, a plurality of maintenance platforms 420, and a plurality of cage assemblies 430. The bridge assembly 410 is arranged around the pool mouth of the component pool 700; a plurality of maintenance platforms 420 are connected to the inner side of the bridge assembly 410 in the circumferential direction, and are located above the component pool 700, for shielding the inspection and operation of the transfer equipment 100 and the lifting assembly 500; a plurality of cage assemblies 430 are connected to the inner side of the bridge assembly 410 in the circumferential direction, and are located above the component pool 700, for disassembling the detector; a plurality of cage assemblies 430 and a plurality of maintenance platforms 420 are arranged in sequence around the circumference of the bridge assembly 410; wherein, the shear assembly and the hanger assembly are arranged on the bridge assembly 410.

[0154] It can be understood that when performing corresponding operations through the dismantling platform 400, the dismantling platform 400 is installed at the pool mouth of the component pool 700, and the operating personnel reach the maintenance platform 420 through the bridge assembly 410. Since the maintenance platform 420 is connected to the inner side of the bridge assembly 410 in the circumferential direction and is located above the component pool 700, the operating personnel can stand on the maintenance platform 420 to perform emergency maintenance and operation on the above-mentioned shielding and transfer equipment 100, lifting assembly 500, coiling equipment 300, etc., and then reach the cage assembly 430 through the beam bridge assembly. Since the cage assembly 430 is connected to the inner side of the bridge assembly 410 in the circumferential direction and is located above the component pool 700, the operating personnel stand on the cage assembly 430 to get close to the detector, so that the upper end (clamp) of the detector can be connected to the lifting ring in the shielding and transfer equipment 100, and after releasing the detector from the shielding and transfer equipment 100, the detector is cut by the shear assembly, thereby facilitating the operating personnel to perform various operations on the corresponding positions of the upper internal components of the nuclear reactor. Alternatively, multiple workers may stand in turn at various working positions on the demolition platform 400 to perform synchronous work to improve work efficiency.

[0155] In some embodiments, the upper stack component 600 of the nuclear reactor is provided with a plurality of guide rods 610 evenly arranged around the circumference of the component pool 700; the dismantling platform 400 also includes a plurality of stabilizing platforms 440 and a plurality of stabilizing assemblies 441 corresponding one by one to the plurality of guide rods 610; the stabilizing platform 440 is connected to the inner side of the bridge assembly 410 in the circumferential direction and is located above the component pool 700, and the stabilizing assembly 441 is arranged on the corresponding stabilizing platform 440, and one end of the stabilizing assembly 441 extending into the component pool 700 is connected to a corresponding guide rod 610.

[0156] Specifically, four guide rods 610, stabilizing components 441, stabilizing platforms 440, cage components 430 and maintenance platforms 420 can be provided. The stabilizing components 441 are provided above the component pool 700 through the stabilizing platform 440. The stabilizing components 441 can be placed directly on the stabilizing platform 440, or a through hole can be opened at the bottom of the stabilizing platform 440. The stabilizing components 441 are connected to the stabilizing platform 440, and extend into the component pool 700 through the through hole and connected to the guide rod 610. Multiple guide rods 610 are connected by multiple stabilizing components 441, so that the upper in-pile components can remain stable and will not tip over, making emergency maintenance and operation of the shielding transfer equipment 100, etc., and disassembly and shearing of the detector more stable.

[0157] Specifically, the bridge component 410 has a connecting platform extending horizontally toward the axis of the component pool 700. The connecting platform is provided with a connecting groove along the direction of the bridge component 410. The connecting groove extends along the direction in which the corresponding beam extends. The stabilizing platform 440 has a hanging protrusion close to the connecting platform. The hanging protrusion is inserted into the connecting groove, so that the stabilizing platform 440 and the bridge component 410 form a cantilever beam structure, thereby realizing a detachable connection between the stabilizing platform 440 and the bridge component 410.

[0158] Specifically, the maintenance platform 420 includes: a ladder, a protective cage, an upper platform, a plurality of legs and a plurality of reinforcing beams. The plurality of legs are connected to the bridge assembly 410, the two ends of the reinforcing beam are respectively connected to two adjacent legs, the upper platform is connected to the plurality of legs, the protective cage is connected to the upper platform, one end of the ladder is connected to the bridge assembly 410, and the other end is connected to the protective cage, so that the operator can climb from the bridge assembly 410 to the protective cage, and the top of the cage assembly 430 is connected to the bridge assembly 410.

[0159] The present application also provides a detector assembly recovery method, which is applied to the nuclear reactor detector assembly recovery system in the above embodiment. Fig. 20 A schematic diagram of a flow chart of a method for recovering a detector assembly according to some embodiments of the present application is shown in FIG. Fig. 20 As shown, the recycling method may include:

[0160] Step S101, respectively installing the shielding transfer device 100, the guide rail assembly 200, the lifting assembly 500, the coiling device 300, the dismantling platform 400, the rack assembly, the shearing assembly and the clamping assembly at corresponding positions of the component pool 700;

[0161] Step S102, controlling the shielding transfer device 100 to extend below the liquid surface of the component pool 700, and pulling out the detector and lifting it into the shielding tube body 110;

[0162] Step S103, controlling the shielding transfer device 100 to move out of the liquid surface of the component pool 700, move to the hanger assembly of the dismantling platform 400, and extend it under the liquid surface of the component pool 700 again, and release the detector at the same time;

[0163] Step S104, hanging the detector on the hanger assembly, and cutting the detector to separate the detector into an upper detector and a lower detector;

[0164] Step S105, using the coiling device 300 to coil the lower section detector, and controlling the high-level container 800 to receive the coiled lower section detector.

[0165] It can be understood that in step S101, the installation of the shielding transfer equipment 100, the guide rail assembly 200, the lifting assembly 500, the coiling equipment 300, the hanger assembly, the shearing assembly and the clamping assembly can be understood by referring to the above-mentioned embodiments, and will not be repeated here. Regarding the installation of the dismantling platform 400, step S101 also includes: step S1011, enclosing the bridge assembly 410 at the pool mouth of the component pool 700, and connecting multiple maintenance platforms 420 and multiple cage assemblies 430 to the bridge assembly 410; step S1012, connecting the multiple stabilizing assemblies 441 on the dismantling platform 400 to the multiple guide rods 610 on the upper stack component 600 of the nuclear reactor in a one-to-one correspondence. Specifically,

[0166] Specifically, the dismantling platform 400 can enter the equipment hatch through a carrier vehicle, complete the installation of four maintenance platforms 420 in front of the equipment hatch, and hoist it above the component pool 700. After the dismantling platform 400 is fixed and installed, the four stabilizing components 441 (lifting sleeves) are connected to the four guide rods 610 of the upper stack component 600 of the nuclear reactor. In this example, the bridge component 410, multiple maintenance platforms 420, multiple cage components 430 and the bridge component 410 are arranged at the pool mouth of the construction pool to facilitate the installation and connection of the detector fixture. The setting of the bracket component on it is convenient for the temporary storage of the detector, as well as the shearing and clamping of the detector. It also includes a long rod tool bracket to realize the opening and closing of the cover and hoisting of the high-level container 800, as well as other emergency operations.

[0167] In some embodiments, step S102 includes: step S1021, removing the protective shell on the top of the detector and installing the clamp; step S1022, driving the shielding tube body 110 to the top of the detector to be pulled out through the transfer mechanism, and reinforcing the extraction assembly 120 to the clamp; step S1023, driving the shielding tube body 110 to enter below the liquid surface, and starting the winch assembly 130 to drive the transmission bar to lift the extraction assembly 120 until the detector is completely entered into the shielding tube body 110.

[0168] Specifically, the shielding transfer equipment 100 is introduced from the equipment hatch and transported to the nuclear island building by a carrier vehicle. The lower cylinder can be flipped to a vertical state using professional lifting equipment and hoisted to a support seat. The upper cylinder can be flipped to a vertical state, and the connection between the upper cylinder and the lower cylinder can be completed through the constructed scaffolding.

[0169] The dismantling process of the detector can be as follows: the operator removes the protective shell of each detector on the dismantling platform 400 and installs a clamp for each detector; the shielding transfer assembly ring is hoisted above the detector to be pulled out; the hoisting assembly 130 lowers the extraction assembly 120 to the outside of the shielding tube body 110, and manually operates to fix the extraction assembly 120 with the clamp; the shielding tube body 110 is lowered to cover the detector, and continues to be lowered so that the shielding tube body 110 is located at a preset distance below the water surface, and the extraction assembly 120 is lifted at the same time. During this process, the operator needs to evacuate the dismantling platform 400. When the hoisting assembly 130 lifts the extraction assembly 120 to the initial position, the detector is pulled out; the lifting ring is moved up to a safe lifting height above the water surface by lifting the shielding tube body 110, and the detector is completely pulled out.

[0170] In some embodiments, step S103 includes: step S1031, driving the shielding tube body 110 out of the water surface through the transfer mechanism and moving it to the bracket assembly; step S1032, driving the shielding transfer equipment 100 to enter the liquid surface again, and at the same time starting the winch assembly 130 to release the transmission bar to allow the detector to detach from the shielding tube body 110; step S1033, driving the shielding transfer equipment 100 to rise, removing the extraction assembly 120 and the clamp, and hanging the clamp on the bracket assembly.

[0171] Specifically, the shielding transfer device 100 moves to the vicinity of the rack assembly, the shielding tube body 110 moves down to, for example, 1.5 meters below the water surface, the extraction assembly 120 is controlled to descend to the lower travel limit, and the shielding tube body 110 moves up at the same time until the clamp of the detector is exposed to the water surface. The operator separates the clamp from the extraction assembly 120 and hangs the detector on the rack assembly. Repeat the above operation until all the detectors are pulled out.

[0172] In some embodiments, step S105 includes: step S1051, transferring the cut lower section detector to the clamping assembly 342 through the clamping assembly, and extending the end of the lower section detector between the first baffle 331 and the reel 321, and driving the first baffle 331 to approach the reel 321 through the third driving unit 332 to clamp the lower section detector; step S1052, starting the second driving unit 322 to drive the reel 321 to rotate, so as to wind the lower section detector on the reel 321, and winding the preset circle After the number of times, the coiling device 300 is controlled to move downward by a preset distance as a whole; in step S1053, after the reel 321 cooperates with the clamping assembly 342 to coil the lower section detector, the clamping assembly 342 moves to avoid it, in step S1054, the guide cylinder 352 is driven by the seventh driving unit 356 to be located between the first baffle 331 and the second baffle 333, and the reel 321 is controlled to be away from the second baffle 333. The guide cylinder 352 receives the lower section detector that falls off from the reel 321 and transports the lower section detector to the high-pressure container 800.

[0173] Specifically, the specific structure of the coiling device 300 can be understood by referring to the above example, and will not be described here. The coiling device is introduced from the equipment hatch and transported to the nuclear island plant by a carrier vehicle; the support platform 210 is hoisted to the side of the component pool 700 for fixed installation, and the track structure 220 is connected to the support platform 210; the coiling device 300 is hoisted to the support platform 210 to complete the installation and debug.

[0174] The operator clamps the lower section of the detector on the clamping tool on the dismantling platform 400, and cuts it at the position where the diameter of the detector changes through the shearing assembly on the dismantling platform 400, and then transfers the cut lower section of the detector to the clamping assembly 342 of the underwater coiling device 300, and clamps the end of the lower section of the detector into the reel 321; the reel 321 starts to coil the detector, and during the coiling process, the coiling device 300 descends to a position of 2 meters underwater, and the coiling of a single detector is completed. The coiling device 300 descends to a position of 7 meters underwater, and the reel 321 moves relative to the second baffle 333, so that the coiled detector falls into the guide cylinder 352, and the guide cylinder 352 moves to the top of the high-pressure container 800. After the temporary storage plate is opened, the detector falls into the high-pressure container 800; the coiling device 300 is lifted to the surface, and the above operation is repeated until the coiling of the detector is completed.

[0175] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0176] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A nuclear reactor detector assembly recovery system, characterized in that: The nuclear reactor detector assembly recovery system comprises: Shielded transport equipment, used to pull the detector out of the nuclear reactor and transport it to a preset location; A coiling device, which is arranged on the guide rail assembly and is driven by the lifting assembly to move under the liquid surface of the component pool, and the coiling device is used to coil a part of the detector; A dismantling platform is arranged at the pool mouth of the component pool, and is used to carry a hanger assembly, a shearing assembly and a clamping assembly. The hanger assembly is used to temporarily store the detector released by the shielding transfer equipment, the shearing assembly is used to shear the detector located at the preset position, and the clamping assembly is used to clamp the sheared part of the detector and move it to the coiling equipment.

2. The nuclear reactor detector assembly recovery system according to claim 1, characterized in that: The nuclear reactor detector assembly recovery system also includes: The high-level container is arranged below the coiling device and below the liquid surface of the component pool, and is used to receive part of the detector after being coiled by the coiling device.

3. The nuclear reactor detector assembly recovery system according to claim 2, characterized in that: The shielding transfer equipment comprises: A shielding tube body, wherein the shielding tube body has a tube cavity, and the tube cavity is used to accommodate the detector; The transfer mechanism is used to drive the shielding tube body to move.

4. The nuclear reactor detector assembly recovery system according to claim 3, characterized in that: The shielding transport device also includes: An extraction component is disposed in the lumen, and the lower end of the extraction component is used to be connected to the detector; A hoisting assembly is arranged outside the shielding tube body, and the hoisting assembly is connected to the drawing assembly through a transmission bar; A guide assembly is arranged at the upper end of the tube cavity and is used to wind the transmission bar so that the transmission bar enters the tube cavity from the winch assembly.

5. The nuclear reactor detector assembly recovery system according to claim 4, characterized in that: The hoisting assembly comprises a motor, the transmission bar comprises a rope, and the motor is used for winding up or releasing the rope.

6. The nuclear reactor detector assembly recovery system according to any one of claims 1 to 5, characterized in that: The guide rail assembly includes a support platform and a track structure, and the support platform is fixed to the pool edge of the component pool; The upper end of the track structure is connected to the support platform, and the lower end of the track structure abuts against the bottom of the component pool; The lifting assembly is arranged on the supporting platform, and the lifting assembly is connected to the coiling device through a pulling bar to drive the coiling device to move up and down.

7. The nuclear reactor detector assembly recovery system according to any one of claims 1 to 5, characterized in that: The coiling device comprises: A fixed plate, slidably connected to the guide rail assembly; The movable plate is arranged on the fixed plate through a first slide rail, A first driving part, disposed between the movable plate and the fixed plate, and used for driving the movable plate to move along a first direction; A reel, the reel being used to coil up a portion of the detector; The second driving part is arranged on the moving plate, the second driving part is connected to the end of the reel, and the second driving part is used for driving the reel to rotate.

8. The nuclear reactor detector assembly recovery system according to claim 7, characterized in that: The coiling device also includes: a first baffle plate, arranged on the fixed plate through a second slide rail, the first baffle plate being located at an end of the reel; The third driving unit is disposed on the fixed plate and connected to the first baffle. The third driving unit is used to drive the first baffle to move along the first direction so as to make the first baffle abut against the end of the roll or move away from the end of the roll.

9. The nuclear reactor detector assembly recovery system according to claim 8, characterized in that: The coiling device also includes: A second baffle is fixed to the fixed plate, and the second baffle is spaced apart from the first baffle along the first direction. The second baffle is used to be sleeved on the reel so that when the reel moves in a direction away from the first baffle along with the movable plate, the part of the detector wound on the reel is separated from the reel.

10. The nuclear reactor detector assembly recovery system according to claim 9, characterized in that: The coiling device also includes: A sliding plate, arranged on the fixed plate through a third sliding rail; a fourth driving unit, disposed on the fixed plate, the fourth driving unit being connected to the sliding plate and configured to drive the sliding plate to reciprocate along the first direction; A clamping assembly is arranged on the fixing plate, and the clamping assembly is used for clamping a part of the detector.

11. The nuclear reactor detector assembly recovery system according to claim 10, characterized in that: The clamping assembly includes a first clamping roller, a second clamping roller and a fifth driving unit, the first clamping roller is fixed to the sliding plate, the fifth driving unit is arranged on the sliding plate, the output end of the fifth driving unit is connected to the second clamping roller, and the fifth driving unit is used to drive the second clamping roller to move along the first direction to approach or move away from the first clamping roller.

12. The nuclear reactor detector assembly recovery system according to claim 11, characterized in that: The coiling device also includes: A support frame, wherein the support frame is disposed on the fixed plate through a fourth slide rail, and the support frame, the movable plate, and the sliding plate are arranged in sequence along a second direction, and the second direction intersects with the first direction; a sixth driving unit, disposed between the fixing plate and the supporting frame, and configured to drive the supporting frame to move along the first direction; The guide cylinder is arranged on the support frame through the fifth slide rail. The guide cylinder has an inlet and can move along the second direction under the drive of the seventh driving unit to receive part of the detector falling from the second baffle.

13. The nuclear reactor detector assembly recovery system according to claim 12, characterized in that: The guide cylinder extends along the second direction, and the guide cylinder also includes an outlet, and a cache plate is arranged between the inlet and the outlet, and the cache plate is used to switch between an open state and a closed state. In the open state, the inlet is connected to the outlet, and in the closed state, the cache plate is used to cache part of the detector entering from the inlet.

14. The nuclear reactor detector assembly recovery system according to any one of claims 1-5 and 8-13, characterized in that: The demolition platform comprises: A bridge component is arranged around the pool mouth of the component pool; A plurality of maintenance platforms connected to the inner side of the bridge assembly in the circumferential direction and located above the component pool, for the maintenance and operation of shielded transfer equipment and lifting components; A plurality of cage assemblies are connected to the inner side of the bridge assembly in the circumferential direction and are located above the component pool, and are used to disassemble the detector; the plurality of cage assemblies and the plurality of maintenance platforms are sequentially arranged at intervals around the circumference of the bridge assembly; Wherein, the shearing assembly and the hanging bracket assembly are arranged on the bridge assembly.

15. The nuclear reactor detector assembly recovery system according to claim 14, characterized in that: The upper stack component of the nuclear reactor is provided with a plurality of guide rods evenly arranged around the circumference of the component pool; The demolition platform also includes a plurality of stabilizing platforms and a plurality of stabilizing components corresponding one by one to the plurality of guide rods; The stabilizing platform is connected to the inner side of the bridge component in the circumferential direction and is located above the component pool. The stabilizing component is arranged on the corresponding stabilizing platform, and one end of the stabilizing component extending into the component pool is connected to the corresponding guide rod.

16. A detector assembly recovery method, applied to the nuclear reactor detector assembly recovery system according to any one of claims 1 to 15, characterized in that: The recovery method comprises: Install the shielding transfer equipment, guide rail assembly, lifting assembly, coiling equipment, dismantling platform, rack assembly, shearing assembly and clamping assembly at corresponding positions of the component pool respectively; Controlling the shielding transfer device to extend below the liquid surface of the component pool, and pulling out the detector and lifting it into the shielding tube body; Controlling the shielding transfer device to move out of the liquid surface of the component pool, move to the hanger assembly of the dismantling platform, and extend it under the liquid surface of the component pool again, while releasing the detector; The detector is hung on the bracket assembly, and the detector is cut to separate the detector into an upper detector and a lower detector; The coiling device is used to coil the lower detector, and the high-level container is controlled to receive the coiled lower detector.

17. The method for recovering a detector assembly according to claim 16, characterized in that: The step of installing the demolition platform at the component pool comprises: The bridge assembly is enclosed at the pool mouth of the component pool, and a plurality of maintenance platforms and a plurality of cage assemblies are connected to the bridge assembly; The plurality of stabilizing components on the dismantling platform are connected one by one with the plurality of guide rods on the upper stack member of the nuclear reactor.

18. The method for recovering a detector assembly according to claim 17, characterized in that: The step of controlling the shielding transfer device to extend below the liquid surface of the component pool and pulling out the detector and lifting it into the shielding tube body comprises: Remove the protective shell on the top of the detector and install the fixture; The shielding tube body is driven to the top of the detector to be pulled out by the transfer mechanism, and the extraction assembly is reinforced and connected with the clamp; The shielding tube body is driven to enter below the liquid surface, and the winch assembly is started to drive the transmission bar to lift the extraction assembly until the detector completely enters the shielding tube body.

19. The method for recovering a detector assembly according to claim 18, characterized in that: The step of controlling the shielding transfer device to move out of the liquid surface of the component pool, move to the hanger assembly of the dismantling platform, and extend it under the liquid surface of the component pool again, and release the detector at the same time includes: The shielding tube body is driven to move out of the water surface and to the hanger assembly by the transfer mechanism; Driving the shielding transfer device to enter the liquid surface again, and simultaneously starting the hoisting assembly to release the transmission bar, so that the detector is separated from the shielding tube body; The shielding transfer device is driven to rise, the extraction assembly and the clamp are removed, and the clamp is hung on the hanger assembly.

20. The method for recovering a detector assembly according to claim 19, characterized in that: The step of using a coiling device to coil the lower detector comprises: The lower section detector cut off is transferred to the clamping assembly by the clamping assembly, and the end of the lower section detector is extended between the first baffle and the reel, and the first baffle is driven to approach the reel by the third driving unit to clamp the lower section detector; The second driving part is started to drive the winding drum to rotate, so as to wind the lower section detector on the winding drum, and after winding a preset number of turns, the winding device is controlled to move downward by a preset distance as a whole; After the reel cooperates with the clamping assembly to wind up the lower detector, the clamping assembly moves to avoid the winding. The guide cylinder is driven by the seventh driving unit and is located between the first baffle and the second baffle to control the reel to move away from the second baffle. The guide cylinder receives the lower detector that falls off from under the reel and transports the lower detector into the high-level container.

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