Integrated heat supply reactor refueling system and refueling method

Abstract

The invention provides an integrated heat supply reactor refueling system. The integrated heat supply reactor refueling system comprises a reactor core pool, a refueling water channel and a sluice gate arranged between the reactor core pool and the refueling water channel, the sluice gate comprises a door frame and a door leaf, one end of the door leaf is rotationally connected with the door frame through at least two door hinge assemblies, and the other end of the door leaf is suitable for being connected with the door frame in a sealed mode through a pneumatic sealing assembly. Wherein the door leaf comprises at least two connecting plates in the vertical direction, and the connecting plates are in a wave shape in the vertical direction of the door leaf. According to the integrated heat supply reactor refueling system, the gate leaf structure of the sluice gate is wavy, and compared with a traditional straight plate structure, the wavy gate leaf can enable the sluice gate to bear higher bending resistance and torsion resistance and can better resist impact force and pressure of water flow, and the risk of deformation and damage of the sluice gate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of core water gate design, and particularly to an integrated heating reactor refueling system. Background Art

[0002] As one of the key auxiliary devices for the disassembly, assembly and fuel handling of a heating reactor, the reactor cavity water gate is located in the main plant building and is used to connect and separate the reactor core from the refueling water channel.

[0003] Refer to Figure 1 During normal operation of the reactor, the reactor cavity water gate is in a closed state. During the disassembly of the reactor after shutdown, it is necessary to hoist the CRDM assembly, the upper RVI, and the lower RVI to the component pool. All the above equipment needs to pass through the reactor cavity water gate, and the required shielding water layer heights are different, which are +13m, +19m, and +23m respectively. The docking water level of the lifting tool with the CRDM, the upper RVI, and the lower RVI is all +13m.

[0004] Specifically, after the water levels in the reactor core and the refueling water channel both rise to +13m, the reactor cavity water gate is in an open state, and the lifting tool connects the CRDM (control rod drive mechanism) assembly and transports it to the storage rack in the component pool. While hoisting the upper RVI, the water levels in the reactor core pool, the refueling water channel, and the component pool rise synchronously to the +19m water level, and the upper RVI is stored in the component pool; since the docking water level of the lifting tool with the lower RVI is at +13m, after the lifting tool moves to the reactor cavity, the reactor cavity water gate is closed, the water levels in the refueling water channel and the component pool rise from +19m to +23m, the water level in the reactor core pool drops from +19m to +13m, and then the lower in-core components (including the entire core) are hoisted on the reactor, and the water level in the reactor core pool rises synchronously to the +23m water level, the reactor cavity water gate is opened, and the lower reactor RVI and the entire core are hoisted to the storage rack in the component pool.

[0005] Since there is only one large crane in the plant building and it is necessary to hoist the in-core components, it is impossible to hoist the reactor cavity water gate to realize the opening and closing function at the same time. The reactor cavity water gate cannot adopt a plug-and-play structure, and it is necessary to close the reactor cavity water gate after the lifting tool is removed from the storage rack.

[0006] Currently, for existing water gates such as refueling pool water gates and spent fuel pool water gates, the above water gate designs cannot be applied to the integrated heating reactor of the present application, and there are the following deficiencies:

[0007] 1. The sealing water level requirement of the reactor cavity water gate is not less than 13m, which is significantly higher than the sealing water level of about 8m for large water gates in other projects, and the sealing difficulty is great.

[0008] 2. The sealing requirement is high. If the reactor cavity water gate leaks, it will affect the installation and storage of fuel, and affect the key refueling path and the maintenance of the reactor cavity area.

[0009] 3. Large water gates mostly adopt a plug-and-play structure. However, due to the overall operation process limitations, the reactor cavity water gate can only adopt a rotary-open structure, and there is no mature experience in the design of the rotary-open structure for large water gates.

[0010] 4. The height of the gate body is as high as 14m, which is much greater than the height of other projects, and thus has high requirements for the stiffness of the gate body itself.

[0011] Based on this, the inventors of the present application propose an integrated heating reactor refueling system in order to solve the above technical problems. Summary of the Invention

[0012] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the reactor cavity water gate has a large self-structure, a high width of the inlet and outlet space, high requirements for the sealed water level, and great sealing difficulty, and to provide an integrated heating reactor refueling system.

[0013] The present invention solves the above technical problems through the following technical solutions:

[0014] The present invention provides an integrated heating reactor refueling system, including:

[0015] A reactor core pool, a refueling water channel, and a water gate provided between the reactor core pool and the refueling water channel;

[0016] The water gate includes a door frame and a door leaf. One end of the door leaf is rotatably connected to the door frame through at least two door hinge assemblies, and the other end is adapted to be sealingly connected to the door frame through a pneumatic sealing assembly; wherein,

[0017] The door leaf includes at least two connecting plates along the vertical direction, and the connecting plates are wavy along the vertical direction of the door leaf.

[0018] According to an embodiment of the present invention, the sealed water level of the water gate is at least not lower than 13m.

[0019] According to an embodiment of the present invention, the door hinge assembly is a bolt and is provided on the door frame, and one end of the door leaf is inserted into the bolt from top to bottom to rotate and cooperate with the door frame.

[0020] According to an embodiment of the present invention, a door opening and closing assembly is provided at the top of the door frame;

[0021] The door opening and closing assembly includes a driver, and the output shaft of the driver is connected to the door hinge assembly located at the top of the door leaf, and the driver is used to drive the door leaf to rotate relative to the door frame.

[0022] According to an embodiment of the present invention, at least two cantilevers are provided on the door leaf, the cantilevers extend horizontally along the door leaf, and the door hinge assembly passes through the cantilevers.

[0023] According to an embodiment of the present invention, the connecting plate is disposed between adjacent cantilevers.

[0024] According to an embodiment of the present invention, a driving mechanism and at least two locking assemblies are further provided on the door leaf, and the at least two locking assemblies are arranged at intervals along the vertical direction of the door leaf;

[0025] The driving end of the driving mechanism is connected to the locking assembly through a connecting rod;

[0026] A locking hole seat is provided on the door frame, and the locking assembly is adapted to cooperate with the locking hole seat when the door leaf is closed.

[0027] According to an embodiment of the present invention, one locking assembly is correspondingly arranged for each cantilever;

[0028] A socket is provided on the locking assembly, and the connecting rod passes through the socket of each locking assembly.

[0029] According to an embodiment of the present invention, the opposite ends of the bottom of the door leaf are respectively arc-shaped;

[0030] The diameter of the arc is at least not less than one-fourth of the width of the door leaf.

[0031] According to an embodiment of the present invention, at least two pneumatic sealing assemblies are arranged around the circumferential circle of the door leaf to be in sealing cooperation with the door frame in the closed state of the door leaf.

[0032] According to an embodiment of the present invention, at least two pneumatic sealing assemblies are respectively connected to a pneumatic system, and at least two pneumatic sealing assemblies operate independently of each other.

[0033] The present invention also provides an integrated heating reactor refueling method, which adopts the above-mentioned integrated heating reactor refueling system, and the refueling method includes:

[0034] During refueling, the water gate is rotated to open to connect the core pool and the refueling water channel; wherein, the sealing water level of the water gate is at least not lower than 13 m.

[0035] The positive and progressive effects of the present invention are as follows:

[0036] For the integrated heating reactor refueling system of the present invention, the door leaf structure of the water gate adopts a wavy shape. Compared with the traditional straight plate structure, the wavy door leaf of the present invention can enable the water gate to bear higher bending and torsion resistance, and can better resist the impact force and pressure of water flow, reducing the risk of deformation and damage of the water gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and other features, properties and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, where:

[0038] Figure 1 It is a schematic diagram of the hoisting water level;

[0039] Figure 2 It is a schematic structural diagram of the integrated heat supply reactor refueling system of the present invention;

[0040] Figure 3 It is a schematic structural diagram of the door leaf of the present invention;

[0041] Figure 4 It is a side view of the door leaf of the present invention;

[0042] Figure 5 It is a top view of the door leaf of the present invention;

[0043] Figure 6 It is Figure 5 an enlarged schematic diagram of the inflatable seal assembly in;

[0044] Figure 7 It is a schematic diagram of the cooperation principle of the pneumatic system and the inflatable seal assembly.

[0045] 1. Door frame; 11. Door opening and closing component; 12. Locking hole seat;

[0046] 2. Door leaf; 21. Connecting plate; 22. Cantilever; 23. Driving mechanism; 24. Locking component; 25. Connecting rod; 26. Socket;

[0047] 3. Door hinge assembly;

[0048] 4. Pneumatic seal assembly; 41. Filter pressure reducing valve; 42. Safety valve; 43. Globe valve; 44. Check valve; 45. Pressure switch; 46. Vacuum pump;

[0049] 5. Pneumatic system;

[0050] 6. Standby gas source. Specific embodiments

[0051] The present invention will be further described below in conjunction with specific embodiments and the drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0053] Please refer to Figures 1 to 6 , the present invention provides an integrated heating reactor refueling system, including a core pool, a refueling water channel and a water gate, and the water gate is located between the core pool and the refueling water channel. Among them, the water gate includes a door frame 1 and a door leaf 2. One end of the door leaf 2 is rotatably connected to the door frame 1 through at least two door hinge assemblies 3, and the other end is adapted to be hermetically connected to the door frame 1 through a pneumatic sealing assembly 4; among them, the door leaf 2 includes at least two connecting plates 21 in the vertical direction, and the connecting plates 21 are wavy along the vertical direction of the door leaf 2.

[0054] Among them, the integrated heating reactor is a reactor type in which main equipment such as a reactor core, a coolant system, and a heat exchanger are integrated in a compact pressure vessel, reducing the complexity of the system and the floor area of the equipment, thereby reducing the leakage risk caused by pipeline connection and improving the reliability and safety of the system.

[0055] It should be noted that the overall height of the door leaf 2 of the present invention is at least 13.87 m, the width is at least 4 m, and the connecting plates 21 on the door leaf 2 in the vertical direction are in a wavy structure.

[0056] The swing-open structure, that is, the structure in which one end of the door leaf 2 introduced above is rotatably connected to the door frame 1 through at least two door hinge assemblies 3 to rotate and open or close. Compared with the traditional straight plate water gate, the present invention arranges the door leaf 2 of the water gate in the form of wavy connecting plates 21. Thus, the water pressure can be more evenly distributed on the entire door leaf 2, having higher bending and torsional resistance capabilities, being able to better resist the impact force and pressure of the water flow, reducing the risk of deformation and damage, improving the stability and safety of the water gate, and being applicable to the use requirements of the door leaf 2 with a large depth in this application.

[0057] Moreover, the door frame 1 and the door leaf 2 adopt the swing-open method of the door hinge assembly 3, so it does not occupy the large crane in the plant, and thus the hoisting of in-core components and the opening and closing of the water gate can be completed synchronously.

[0058] Refer to Figure 2 , the door hinge assembly 3 is a bolt and is arranged on the door frame 1, and one end of the door leaf 2 is inserted into the bolt from top to bottom to rotate and cooperate with the door frame 1.

[0059] The door frame 1 provides structural support for the water gate and can be welded to the steel cladding at the same time. The sealing performance needs to be ensured during the welding process.

[0060] The door hinge assembly 3 is used to connect the door leaf 2 and the door frame 1, so that the door leaf 2 can be lifted out or installed on the door frame 1 without draining the water on both sides of the pool.

[0061] Specifically, the door hinge assembly 3 includes a door hinge shaft, an upper door hinge rotating arm, a door hinge seat and a shaft sleeve. A plurality of door hinge assemblies 3 are vertically arranged on the water gate to support the door leaf 2, providing multi-point support to improve the rigidity of the structure of the door leaf 2.

[0062] Preferably, the material of the door hinge assembly 3 is 05Cr17Ni4Cu4Nb martensitic precipitation hardening stainless steel, which can further improve the stiffness and strength of the door leaf 2.

[0063] Furthermore, a door opening and closing assembly 11 is provided at the top of the door frame 1; the door opening and closing assembly 11 includes a driver, and the output shaft of the driver is connected to the door hinge assembly 3 located at the top of the door leaf 2. The driver is used to drive the door leaf 2 to rotate relative to the door frame 1.

[0064] It can be seen that the driver can integrate a reducer, a motor and a brake, and has the characteristics of parallel output with the motor shaft, compact structure, large transmission torque, stable operation, low noise and long service life.

[0065] The driver has a worm and worm gear reducer shaft sleeve. One end (the upper door hinge rotating arm) of the door hinge assembly 3 located at the top of the door leaf 2 is sleeved into the shaft sleeve, and the driver is integrally installed in the embedded part of the steel cladding of the door frame 1, with a compact structure, a high reduction ratio and self-locking.

[0066] At the same time, an oil collecting pan is added to prevent the reducer from leaking oil and adding new foreign matters.

[0067] Specifically, the door opening and closing assembly 11 is used to drive the door leaf 2 to rotate relative to the door frame 1 to open to 90° or close the door leaf 2.

[0068] Please continue to refer to Figures 2 to 4 , at least two cantilevers 22 are provided on the door leaf 2, the cantilevers 22 extend transversely along the door leaf 2, and the door hinge assembly 3 is passed through the cantilevers 22.

[0069] With multiple groups of cantilevers 22 as supports, multiple points can improve the rigidity of the structure of the door leaf 2, and are also beneficial to the overall up-and-down synchronous opening and closing of the door leaf 2.

[0070] Furthermore, a connecting plate 21 is provided between adjacent cantilevers 22.

[0071] Refer to Figure 4 , the connecting plate 21 is a corrugated sheet metal part, and both ends of the connecting plate 21 are respectively connected to the cantilever 22 by welding. Among them, at least 11m of the whole door leaf 2 adopts the corrugated connecting plate 21 structure, so that the overall moment of inertia of the door leaf 2 is large, the stiffness is high and the strength is high.

[0072] That is, the cantilever 22 is used to install the connecting plate 21 to improve the structural strength of the door leaf 2 on the one hand, and is also used to install the door hinge assembly 3 to ensure the connection strength between the door leaf 2 and the door frame 1 on the other hand.

[0073] Please continue to refer to Figure 2 and Figure 3 A driving mechanism 23 and at least two locking assemblies 24 are also provided on the door leaf 2, and at least two locking assemblies 24 are arranged at vertical intervals along the door leaf 2; the driving end of the driving mechanism 23 is connected to the locking assembly 24 through a connecting rod 25; a locking hole seat 12 is provided on the door frame 1, and the locking assembly 24 is suitable for cooperating with the locking hole seat 12 when the door leaf 2 is closed.

[0074] In order to improve the synchronization of the locking cooperation between the door frame 1 and the door leaf 2 when the door leaf 2 is closed, at least two locking components 24 are arranged vertically along the door leaf 2, and each locking component 24 is further synchronously driven by a driving mechanism 23, thereby ensuring that each locking component 24 can be synchronously matched with the locking hole seat 12 on the door frame 1 during operation.

[0075] With such an arrangement, even when the height of the door leaf 2 is greatly increased and the pressure at the bottom of the water is also significantly increased, the door leaf 2 can be accurately and synchronously moved vertically close to the door frame 1 under the drive of the opening and closing door assembly 11, and then the door leaf 2 can be closed, eliminating the limitation that traditional large sluice gates can only adopt a swing-open structure.

[0076] Preferably, a locking assembly 24 is correspondingly provided for each cantilever 22 ; a socket 26 is provided on the locking assembly 24 , and the connecting rod 25 is passed through the socket 26 of each locking assembly 24 .

[0077] That is, except for the topmost locking assembly 24, the remaining locking assemblies 24 are each provided with a socket 26 on the cantilever 22, and the connecting rod 25 is passed through each socket 26 to connect all the locking assemblies 24. By opening the driving mechanism 23, all the locking assemblies 24 can be synchronously driven to cooperate with the locking hole seat 12 on the door frame 1.

[0078] Reference Figure 2 Taking three cantilevers 22 as an example, the connecting rod 25 is divided into two ends. The upper connecting rod 25 is located between the top cantilever 22 and the middle cantilever 22, and the length can be 7250 mm. The lower connecting rod 25 is located between the middle cantilever 22 and the bottom cantilever 22, and the length can be 4880 mm to ensure the stiffness and strength of the lower connecting rod 25.

[0079] Reference Figure 3 The two opposite ends of the bottom of the door leaf 2 are respectively arranged in an arc shape; the diameter of the arc is at least not less than one quarter of the width of the door leaf 2.

[0080] It can be seen that the higher the height of the door leaf 2, the greater the water pressure on the structure of the bottommost door leaf 2, and the sealing structure at the bottom of the door leaf 2 is prone to deformation, resulting in the bottom of the door leaf 2 being the area most likely to have poor sealing.

[0081] Based on this, the present invention adopts a large arc transition at the bottom of the door leaf 2, increases the bottom arc radius, and improves the problem of the decline in sealing performance caused by bending at the bottom arc of the sealing ring (described later).

[0082] It can be seen that at least two pneumatic sealing components 4 are arranged around the circumferential circle of the door leaf 2 to be in sealing cooperation with the door frame 1 when the door leaf 2 is in the closed state.

[0083] Please refer to Figure 5 and Figure 6 , at least two pneumatic sealing components 4 are respectively used to be connected with the pneumatic system 5, and at least two pneumatic sealing components 4 operate independently of each other.

[0084] Specifically, the pneumatic sealing component 4 is a sealing ring, and the sealing ring is wound around the outer periphery of the door leaf 2.

[0085] The plant can be provided with a standby air source 6 to provide a redundant function. The pneumatic system 5 is provided with an automatic monitoring function. When the air pressure value is too high or too low, it will automatically monitor and alarm, and realize the function of automatic air replenishment.

[0086] Moreover, a vacuum pump 46 is simultaneously provided to increase the gap between the pneumatic sealing component 4 and the door frame 1 by pumping vacuum, avoiding the collision between the door leaf 2 of the rotary water gate and the door frame 1 component during opening and closing.

[0087] The bottom of the door leaf 2 of the present invention adopts a large arc transition structure, which can improve the problem of the weakening of the sealing performance at the bottom arc part of the sealing ring. Moreover, the setting of the double-channel inflatable seal and the standby power supply structure has better safety redundancy. Each sealing ring is equipped with a pressure monitoring and automatic air replenishment function, which can monitor the sealing performance in real time. At the same time, the vacuum pump 46 can avoid the scraping of the sealing ring during the opening and closing process.

[0088] With such a setting, the present invention can meet the sealing structure design of water gates with large depth and high reliability.

[0089] Refer to Figure 7 , the pneumatic sealing component 4 includes the design of two inflatable sealing members (sealing rings) and the pneumatic system 5.

[0090] The material of the inflatable sealing member can adopt ethylene propylene diene monomer rubber, which has better radiation resistance performance and good sealing performance. The double-channel seal can realize independent control, but it is not limited thereto, and other sealing materials can also be adopted.

[0091] The pneumatic system 5 includes a standby air source 6, a filter pressure reducing valve 41, a safety valve 42, a stop valve 43, a check valve 44, a pressure switch 45, a vacuum pump 46 and various pipelines (including connecting devices). Through the design of the stop valve 43, check valve 44, etc., the double-channel inflatable seals are in parallel, and each seal can be independently controlled.

[0092] The plant is equipped with a standby air source 6 to provide a safety redundancy function.

[0093] Through the pressure switch 45 and the safety valve 42, the overall pneumatic circuit can achieve an automatic monitoring function.

[0094] Specifically, when the air pressure value is too high or too low, the system will automatically monitor and alarm, and can achieve automatic inflation and deflation. The design of the vacuum pump 46 increases the gap between the inflatable seal and the door frame 1 assembly before each door opening, avoiding the collision between the door leaf 2 of the swing-open water gate and the door frame 1 when the door leaf 2 opens and closes.

[0095] It can be seen that the door leaf 2 is also provided with lifting lugs, and the door leaf 2 can be lifted out as a whole for maintenance and spare part replacement.

[0096] During the use of the water gate of the present invention, first deflate the pneumatic seal assembly 4, release the locking mechanism, and then open the opening and closing door assembly 11 to rotate the door leaf 2 to achieve the door opening action, and the door closing action is the opposite.

[0097] The water gate provided by the present invention solves the problems of the large self-structure of the door body of the reactor cavity water gate in the integrated heat supply reactor, the wide access space, the high requirement for the sealing water level and the great sealing difficulty.

[0098] The present invention also proposes a refueling method for an integrated heat supply reactor. Using the above integrated heat supply reactor, the refueling method includes:

[0099] During refueling, the water gate is rotated to open to connect the reactor core pool and the refueling water channel; wherein, the sealing water level of the water gate is at least not less than 13m.

[0100] The sealing water level of the water gate of the traditional large reactor does not exceed 8m, while the sealing water level of the water gate in the integrated heat supply reactor of the present invention is at least not less than 13m.

[0101] Moreover, generally there is only one crane in the plant. Therefore, to meet the simultaneous refueling and the opening and closing of the water gate, the present invention adopts a swing-open water gate, and through a series of improvements to the water gate structure, it meets the use requirements of the deep reactor type.

[0102] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "attachment", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may also be a mechanical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0103] The present application uses specific terms to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the present application can be appropriately combined.

[0104] Although the present invention is disclosed above in preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention all fall within the protection scope defined by the claims of the present invention.

Claims

1. An integrated heating stack refueling system, characterized in that: include: A core water pool, a refueling water channel, and a sluice gate provided between the core water pool and the refueling water channel; The sluice gate comprises a door frame and a door leaf, one end of the door leaf is rotatably connected to the door frame through at least two door hinge assemblies, and the other end is suitable for sealing connection with the door frame through a pneumatic sealing assembly; wherein, The door leaf includes at least two connecting plates in the vertical direction, and the connecting plates are wavy in the vertical direction of the door leaf.

2. The integrated heating stack refueling system according to claim 1, characterized in that: The sealing water level of the sluice gate is at least not less than 13m.

3. The integrated heating stack refueling system according to claim 1, characterized in that: The door hinge assembly is a latch and is arranged on the door frame. One end of the door leaf is inserted into the latch from top to bottom and rotates in cooperation with the door frame.

4. The integrated heating stack refueling system according to claim 3, characterized in that: The top of the door frame is provided with an opening and closing door assembly; The opening and closing door assembly includes a driver, the output shaft of the driver is connected to the door hinge assembly located at the top of the door leaf, and the driver is used to drive the door leaf to rotate relative to the door frame.

5. The integrated heating stack refueling system according to claim 3, characterized in that: At least two cantilevers are arranged on the door leaf, the cantilevers extend transversely along the door leaf, and the door hinge assembly is passed through the cantilevers.

6. The integrated heating stack refueling system according to claim 5, characterized in that: The connecting plate is arranged between adjacent cantilevers.

7. The integrated heating stack refueling system according to claim 5, characterized in that: The door leaf is also provided with a driving mechanism and at least two locking assemblies, and the at least two locking assemblies are arranged at intervals along the vertical direction of the door leaf; The driving end of the driving mechanism is connected to the locking assembly through a connecting rod; The door frame is provided with a locking hole seat, and the locking assembly is suitable for cooperating with the locking hole seat when the door leaf is closed.

8. The integrated heating stack refueling system according to claim 7, characterized in that: Each of the cantilevers is correspondingly provided with a locking assembly; The locking assembly is provided with a socket, and the connecting rod is passed through the socket of each locking assembly.

9. The integrated heating stack refueling system according to any one of claims 1 to 7, characterized in that: The opposite ends of the bottom of the door leaf are respectively arranged in an arc shape; The diameter of the arc is at least not less than one quarter of the width of the door leaf.

10. The integrated heating stack refueling system according to claim 1, characterized in that: At least two of the pneumatic sealing assemblies are arranged around the circumference of the door leaf to seal with the door frame when the door leaf is in a closed state.

11. The integrated heating stack refueling system according to claim 10, characterized in that: At least two of the pneumatic sealing assemblies are respectively used to connect to the pneumatic system, and at least two of the pneumatic sealing assemblies operate independently of each other.

12. An integrated heating reactor refueling method, characterized in that: The integrated heating stack refueling system according to any one of claims 1 to 11 is used, wherein the refueling method comprises: During refueling, the core water pool and the refueling waterway are connected by rotating and opening the sluice gate; wherein the sealing water level of the sluice gate is at least not less than 13m.

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