Reactor building, arrangement method thereof and nuclear power station

Abstract

The invention provides a reactor building, an arrangement method thereof and a nuclear power station. The arrangement method of the reactor building comprises the following steps: dividing a vertical surface space of the reactor building into layers along the vertical direction, arranging a reactor pit and a containment pit on a third underground layer, and arranging a first loop main equipment compartment, a second loop main equipment compartment and a third loop main equipment compartment on a second underground layer and above the second underground layer. A high-position refueling water tank of the passive safety injection system is arranged in a high-position refueling water tank compartment of a first underground layer, so that water in the high-position refueling water tank can submerge a reactor pit and main equipment of a reactor coolant system under the action of gravity. The method comprises the following steps: arranging core equipment of a passive special safety system in a containment; a special safety system related to safety can resist external disasters by means of the containment, and meanwhile, the system does not need to be switched between the inside and the outside of the containment during operation, so that the reliability of the system is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power, and in particular to a reactor building and a layout method thereof, and a nuclear power plant. Background Art

[0002] The reactor building is the core building of a pressurized water reactor nuclear power plant. Its function is to provide protection for the reactor coolant system and its related systems, and to serve as the third barrier to contain radioactive materials after a design basis accident. The main items arranged inside the building include the reactor coolant system, dedicated safety system, and related equipment and structures of the auxiliary and support systems.

[0003] The purpose of the dedicated safety system is to ensure the safe operation of the reactor and prevent and mitigate the consequences of accidents. At present, the main reactor type of nuclear power plants in operation in China is the CPR / ACPR1000 reactor type, which uses an active dedicated safety system. The action of active dedicated safety facilities requires external power, and its inherent safety is lower than that of passive dedicated safety facilities. Therefore, the application of passive safety systems is an important trend in the development of nuclear power plant technology. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention provides a reactor building and a layout method thereof, and a nuclear power plant, so as to realize the layout of a passive dedicated safety system in the containment.

[0005] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present invention provides a reactor building layout method, which includes: dividing the vertical space of the reactor building into levels, wherein the levels include at least the third underground level, the second underground level, and the first underground level, which are arranged from bottom to top below the ground. The reactor pit and the containment pit are arranged on the third underground level, the reactor pressure vessel is arranged in the reactor pit, and the containment pit is arranged on the periphery of the reactor pit. The first-loop main equipment compartment, the second-loop main equipment compartment, and the third-loop main equipment compartment are arranged in sequence on the second underground level and above around the reactor pit. The main equipment of multiple reactor coolant systems are arranged in the first-loop main equipment compartment, the second-loop main equipment compartment, and the third-loop main equipment compartment, respectively. The high-level refueling water tank compartment is arranged at and above the first underground layer, and the high-level refueling water tank of the passive safety injection system is arranged in the high-level refueling water tank compartment, so that the water in the high-level refueling water tank can submerge the reactor pit and the main equipment of the reactor coolant system under the action of gravity.

[0006] In one embodiment of the reactor building layout method of the present invention, any one or more of the first-loop main equipment compartment, the second-loop main equipment compartment, the third-loop main equipment compartment, and the high-level refueling water tank compartment are assembled using structural modules.

[0007] In one embodiment of the reactor building layout method of the present invention, a first injection box compartment and a first injection valve compartment are arranged in the second underground layer between the first loop main equipment compartment and the third loop main equipment compartment. A second injection box compartment and a second injection valve compartment are arranged in the second underground layer between the second loop main equipment compartment and the third loop main equipment compartment.

[0008] In one embodiment of the reactor building layout method of the present invention, a residual discharge system functional room is arranged in the first underground layer between the structural module of the high-level refueling water tank compartment, the structural module of the first loop main equipment compartment and the inner wall of the reactor building. A chemical volume system functional room is arranged in the first underground layer between the structural module of the second loop main equipment compartment and the inner wall of the reactor building.

[0009] In one embodiment of the reactor building layout method of the present invention, the levels further include a first aboveground layer sequentially arranged above the first underground layer. The reactor refueling pool compartment is arranged on and above the first aboveground layer. The reactor refueling pool is arranged in the reactor refueling pool compartment, and the reactor refueling pool is located directly above the reactor pressure vessel.

[0010] In an embodiment of the reactor building layout method of the present invention, the core water supply tank of the passive safety injection system is arranged on the first aboveground floor.

[0011] In an embodiment of the reactor building layout method of the present invention, the reactor refueling pool compartment is assembled using structural modules.

[0012] In one embodiment of the reactor building layout method of the present invention, the levels further include a second aboveground layer arranged sequentially above the first aboveground layer. The main water supply pipeline is concentrated from outside the reactor building into the second aboveground layer and then connected to a plurality of main equipment of the reactor coolant system.

[0013] In one embodiment of the reactor building layout method of the present invention, the levels further include a third above-ground layer sequentially arranged above the second above-ground layer. Main steam pipes connected to main equipment of the reactor coolant system are centrally connected to the outside of the reactor building from the third above-ground layer.

[0014] In an embodiment of the reactor building layout method of the present invention, the levels further include a fourth floor above the ground that is sequentially arranged above the third floor above the ground. The main fan of the containment cooling ventilation system is arranged on the fourth floor above the ground.

[0015] In one embodiment of the reactor building layout method of the present invention, the levels further include a fifth above-ground layer arranged sequentially above the fourth above-ground layer. An evaporator of a passive containment heat removal system is arranged on the fifth above-ground layer along the inner wall of the reactor building in a circumferential direction.

[0016] The second aspect of the present invention also provides a reactor building arranged by the above-mentioned arrangement method.

[0017] The third aspect of the present invention also provides a nuclear power plant, comprising the above-mentioned reactor building.

[0018] In the reactor building and its arrangement method and nuclear power plant of the present invention, the core equipment of the passive dedicated safety system is arranged in the containment, so that the safety-related dedicated safety system can rely on the containment to resist external disasters, and there is no need to switch between the inside and outside of the containment during the operation of the system, thereby greatly improving the reliability of the system. At the same time, the high-level refueling water tank of the passive safety injection system is arranged at a high position relative to the reactor pit and the main equipment of the reactor coolant system, so that the water in the high-level refueling water tank can submerge the reactor pit and the main equipment of the reactor coolant system under the action of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other embodiments can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the third underground floor structure of the reactor building of the present invention;

[0021] Figure 2 This is a schematic diagram of the second underground structural layout of the reactor building of the present invention;

[0022] Figure 3 This is a schematic diagram of the first underground structural layout of the reactor building of the present invention;

[0023] Figure 4 This is a schematic diagram of the first floor structure layout of the reactor plant of the present invention;

[0024] Figure 5 It is a schematic diagram of the second-floor structure layout of the reactor plant of the present invention;

[0025] Figure 6 This is a schematic diagram of the third-floor structure layout of the reactor plant of the present invention;

[0026] Figure 7 This is a schematic diagram of the fourth floor structure layout of the reactor plant of the present invention;

[0027] Figure 8 It is a schematic diagram of the fifth-floor structural layout of the reactor plant of the present invention.

[0028] Component number description:

[0029] 1. Reactor pit; 2. Containment pit; 3. Pit inspection passage; 4. Safety injection system compartment; 41. First injection box compartment; 42. First injection valve room; 43. Second injection box compartment; 44. Second injection valve room; 5. First structural module; 51. First loop main equipment compartment; 52. High-level refueling water tank compartment; 6. Second structural module; 61. Second loop main equipment compartment; 7. Third structural module; 71. Third loop main equipment compartment; 72. Stabilizer compartment; 8. Reactor refueling pool compartment; 9. Waste discharge system function room; 10. Chemical capacity system function room; 11. Evaporator. DETAILED DESCRIPTION

[0030] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0031] When numerical ranges are given in the embodiments, it should be understood that unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any method, device and material of the prior art similar or equivalent to the method, device and material in the embodiments of the present invention can also be used to implement the present invention.

[0032] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0033] The purpose of the dedicated safety system is to ensure the safe operation of the reactor and prevent and mitigate the consequences of accidents. According to the system implementation principle, the dedicated safety system is generally divided into active dedicated safety system and passive dedicated safety system. Among them, the passive safety system does not require external power and uses natural laws such as gravity and temperature difference to realize system operation, which has higher inherent safety. Therefore, the application of passive safety system is an important trend in the development of nuclear power plant technology. Please refer to Figures 1 to 8 The present invention provides a reactor building and a layout method thereof, and a nuclear power plant. By adopting a reactor building layout plan for a passive dedicated safety system, the core equipment of the passive dedicated safety system is arranged in the containment of the reactor building, and the high-level refueling water tank of the passive safety injection system is arranged at a high level relative to the reactor pit and the main equipment of the reactor coolant system.

[0034] See also Figures 1 to 8 The present invention provides a reactor building layout method. In order to meet the layout requirements of the passive system, in the reactor building layout method, the layers are first divided from bottom to top according to the vertical elevation space of the reactor building, and the layers include three underground floors and five above-ground floors. The three underground floors and the five above-ground floors are both within the main structure of the reactor building, that is, the containment. The structure and shape of the containment are not limited. For example, the existing containment structure can be referred to, which is usually a cylindrical prestressed reinforced concrete structure with a spherical dome on the top. When the containment adopts a double-layer containment design, the three underground floors and the five above-ground floors are located in the inner containment.

[0035] See also Figures 1 to 8 The three underground floors are divided vertically from bottom to top into the third underground floor, the second underground floor, and the first underground floor. The five above-ground floors are divided vertically from bottom to top into the first above-ground floor, the second above-ground floor, the third above-ground floor, the fourth above-ground floor, and the fifth above-ground floor. It should be noted that there is no limit on the height of each floor, and it can be any size type that meets the actual design requirements.

[0036] See also Figure 1The reactor pit 1 is the bottom structure of the reactor building and is arranged on the third underground floor. The reactor pressure vessel is arranged in the reactor pit 1. The reactor pit 1 can be extended to the set layer according to the design requirements so that the reactor pressure vessel arranged in the reactor pit 1 is connected to the main equipment (steam generator and main pump) of the reactor coolant system. It should be noted that the specific number of layers that the reactor pit 1 passes through is not limited, and can be adjusted according to the connection position of the reactor pressure vessel and the main equipment of the reactor coolant system. Specifically, in this embodiment, the reactor pit 1 extends from the third underground floor to the first underground floor. The containment pit 2 and the pit inspection channel 3 are also arranged on the third underground floor. The containment pit 2 is arranged on the periphery of the reactor pit 1. The storage tanks and pits of the nuclear island exhaust and drainage system are arranged in the containment pit 2. The process waste liquid and ground waste liquid during the operation of the power plant can be collected by gravity flow or pumping system. The pit inspection channel 3 is a safe channel for the maintenance, inspection and necessary repair work of the reactor pit 1 and the equipment arranged therein. A connecting passage is also provided between the containment pit 2 and the second underground layer. The connecting passage can be connected in any manner, and can be connected by stairs, elevators or other vertical passages, so as to facilitate access from the second underground layer to the third underground layer. In the containment in the third underground layer, the area except for the three process function rooms of the reactor pit 1, the containment pit 2 and the reactor pit inspection passage 3 is filled with concrete to meet the requirements of containment flooding after an accident.

[0037] The overall layout of the reactor coolant system determines the main layout features of the reactor building. Existing reactor coolant systems usually include two-loop, three-loop and four-loop structures. Different loop structures have different effects on the layout of the building. In this embodiment, a three-loop structure is adopted, and the first-loop main equipment compartment 51, the second-loop main equipment compartment 61, and the third-loop main equipment compartment 71 are arranged in sequence in the second underground layer around the reactor pit 1, and extend through the set layer according to design requirements. Please refer to Figure 3 and Figure 4The second underground floor serves as the main equipment support layer of the reactor coolant system. The second underground floor mainly arranges the vertical supports for the steam generators and main pumps of the three loops of the reactor coolant system. The vertical support provides vertical support force for the steam generator and main pump of each loop. The structure of the vertical support is not limited. For example, a steel support structure or a concrete support structure can be used. The main equipment of multiple reactor coolant systems are arranged in the first loop main equipment compartment 51, the second loop main equipment compartment 61, and the third loop main equipment compartment 71 respectively. Specifically, the main equipment of the reactor coolant system includes a steam generator and a main pump. The single loop main equipment compartment includes a steam generator compartment and a main pump compartment. The steam generator compartment is used to arrange the steam generator of the reactor coolant system. The main pump compartment is used to arrange the main pump of the reactor coolant system. It should be noted that the specific number of floors that the first-loop main equipment compartment 51, the second-loop main equipment compartment 61, and the third-loop main equipment compartment 71 pass through is not limited, and can be adjusted according to the actual situation based on the steam generator, the main pump, and the related connecting pipelines. Specifically, in this embodiment, the main pump compartment of the first-loop main equipment compartment 51 extends from the second underground floor to the third above-ground floor, and the steam generator compartment of the first-loop main equipment compartment 51 extends from the second underground floor to the fifth above-ground floor. Similarly, the main pump compartment of the second-loop main equipment compartment 61 extends from the second underground floor to the third above-ground floor; the steam generator compartment of the second-loop main equipment compartment 61 extends from the second underground floor to the fifth above-ground floor. And, the main pump compartment of the third-loop main equipment compartment 71 extends from the second underground floor to the third above-ground floor, and the steam generator compartment of the third-loop main equipment compartment 71 extends from the second underground floor to the fifth above-ground floor.

[0038] See also Figure 3 , arrange the high-level refueling water tank compartment 52 on the first underground floor, and extend through the set layer according to design requirements. Arrange the high-level refueling water tank of the passive safety injection system in the high-level refueling water tank compartment 52, so that the water in the high-level refueling water tank can submerge the reactor pit 1 and the main equipment of the reactor coolant system under the action of gravity. It should be noted that the specific number of layers that the high-level refueling water tank compartment 52 passes through is not limited and can be adjusted according to actual needs. Specifically, in this embodiment, the high-level refueling water tank compartment 52 is a pool-shaped structure formed by a civil engineering structure, and an inner lining steel plate is laid in the structure to form a high-level refueling water tank, which extends from the first underground floor to the fourth above-ground floor.

[0039] See also Figure 3 and Figure 4The high-level refueling water tank of the passive safety injection system is arranged on the first underground floor and is located in the first structural module 5. Specifically, the high-level refueling water tank compartment 52 is located in the first underground floor, and the high-level refueling water tank compartment 52 is used to arrange the high-level refueling water tank. The high-level refueling water tank is arranged close to the first loop main equipment compartment 51, and can quickly provide necessary cooling water to the reactor coolant system in the event of an accident, matching the arrangement requirements of the passive safety injection system. At the same time, the high-level refueling water tank serves as a heat sink for the passive residual heat removal system, and a heat exchanger of the passive residual heat removal system is arranged inside.

[0040] After the construction of the third underground floor was completed, in order to significantly increase the construction speed and improve the economic efficiency of the plant building, a modular structure was adopted for some process function rooms in the second underground floor and the area above it according to the overall layout design. Figures 2 to 4 In an embodiment of the reactor building layout method of the present invention, any one or more of the first loop main equipment compartment 51, the second loop main equipment compartment 61, the third loop main equipment compartment 71, and the high-level refueling water tank compartment 52 are assembled by structural modules. Specifically, in this embodiment, according to the layout of the plant location, the facade area where the high-level refueling water tank compartment 52 and the first loop main equipment compartment 51 are located is used as the first modular construction area to adopt modular construction to form a first structural module 5, and the first structural module 5 includes the high-level refueling water tank compartment 52 and the first loop main equipment compartment 51. The facade area where the second loop main equipment compartment 61 is located is used as the second modular construction area to adopt modular integrated construction to form a second structural module 6, and the second structural module 6 includes the second loop main equipment compartment 61. The facade area where the third loop main equipment compartment 71 is located is used as the third modular construction area to adopt modular integrated construction to form a third structural module 7, and the third structural module 7 includes the third loop main equipment compartment 71. At the same time, the third structural module 7 also includes a stabilizer compartment 72. The stabilizer compartment 72 is used to arrange the stabilizer. Specifically, in this embodiment, the stabilizer compartment 72 extends from the first floor above the ground to the fourth floor above the ground. By using structural modules to splice and form the above-mentioned compartments and process function rooms, space utilization is optimized, the constructability of the plant is improved, and the modular design of the structure can shorten the construction period of the power plant, reduce costs, and improve the economic efficiency of the nuclear power plant.

[0041] See also Figure 2In an embodiment of the reactor building layout method of the present invention, the first injection box compartment 41 and the first injection valve room 42 are arranged in the second underground layer between the first loop main equipment compartment 51 and the third loop main equipment compartment 71; the second injection box compartment 43 and the second injection valve room 42 are arranged in the second underground layer between the second loop main equipment compartment 61 and the third loop main equipment compartment 71. The first injection box compartment 41, the first injection valve room 42, the second injection box compartment 43 and the second injection valve room 44 serve as the safety injection system compartment 4; the first injection box compartment 41 and the second injection box compartment 43 are used to arrange the injection box, which is used to store low-temperature boron-containing water. The injection box uses nitrogen pressure storage inside, which can be used to provide medium-pressure reaction coolant replenishment and boronization in the event of an accident, so as to ensure the safety of the core under a loss of coolant accident. The first injection valve room 42 and the second injection valve room 44 are used to arrange multiple key valves to control the water flow in the safety injection system. The injection box and the injection valve room are an important part of the safety injection system of a nuclear power plant. The main function of the safety injection system is to complete the emergency cooling of the core when an accident such as loss of water in the reactor coolant system or a pipeline rupture in the main steam system occurs.

[0042] In the reactor building layout method of the present invention, core equipment such as the high-level refueling water tank, the injection box, and the injection valve room of the passive safety injection system are arranged in the three underground layers within the containment, so that the safety-related passive safety injection system can rely on the containment to resist external disasters. At the same time, the operation of the system does not need to switch between the inside and outside of the containment, thereby greatly improving the reliability of the system. At the same time, the low-level underground layout of the reactor coolant system further improves the seismic performance of the reactor coolant system. The reactor coolant system located in the low underground layer can meet the requirement that the high-level refueling water tank can submerge the entire reactor core in a passive manner after an accident, thereby improving the inherent safety of the power plant.

[0043] It should be noted that the specific structures or system components of the high-level refueling water tank, steam generator and main pump of the reactor coolant system, pressurizer, injection valve room of the passive safety injection system, injection box, and high-level refueling water tank are widely used in the field of nuclear power, and their various parts and connection relationships refer to the existing structure, only the plane layout and spatial layout position in the reactor building have been changed. Therefore, the substantive content will not be described in detail here.

[0044] See also Figure 2In one embodiment of the reactor building layout method of the present invention, the reactor refueling pool compartment 8 is arranged on the first floor above ground, and extends through the set layer according to the design requirements. It should be noted that the specific number of layers that the reactor refueling pool compartment 8 passes through is not limited, and can be adjusted according to the actual design requirements of the reactor refueling pool. Specifically, in this embodiment, the reactor refueling pool compartment 52 is a pool-shaped structure formed by a civil engineering structure, and a lining steel plate is laid in the structure to form a reactor refueling pool, which extends from the first floor above ground to the third floor above ground. The reactor refueling pool compartment is assembled using structural modules, and the facade area where the reactor refueling pool compartment 8 is located is constructed using modular integrated construction as the fourth modular construction area to form a fourth structural module. The reactor refueling pool compartment 8 is a prefabricated structural module. It is consistent with the structural modular integration concept of other structural modules described in the above embodiments to increase the speed of plant construction.

[0045] See also Figure 3 In one embodiment of the reactor building layout method of the present invention, the first underground floor is an auxiliary system function floor. In order to match the needs of the surrounding buildings, necessary auxiliary function rooms are arranged. The residual heat removal system function room 9 is arranged in the first underground floor between the structural module of the high-level refueling water tank compartment 52, the structural module of the first loop main equipment compartment 51 and the inner wall of the reactor building; the chemical volume system function room 10 is arranged in the first underground floor between the structural module of the second loop main equipment compartment 61 and the inner wall of the reactor building. Specifically, the residual heat removal system function room 9 and the chemical volume system function room 10 are arranged in the first underground floor. And according to the above-mentioned prefabricated structural module and the area between the side wall of the containment of the reactor building, a compartment structure is formed, and the prefabricated structural module is reasonably used for construction to speed up the construction of the building. The residual heat removal system function room 9 is used as a room or area for arranging equipment related to the residual heat removal system, and the chemical volume system function room 10 is used as a room or area for arranging equipment related to the chemical and volume control system. At the same time, the underground area of ​​the containment outside the above-mentioned prefabricated structural modules and auxiliary function rooms is filled with concrete to further meet the requirement of submerging the entire reactor core in a passive manner after an accident, thereby improving the inherent safety of the power plant.

[0046] See also Figure 4In one embodiment of the reactor building layout method of the present invention, the first floor above ground is arranged as a personnel passage layer, and personnel enter the other floors of the reactor building upward or downward. At the same time, the core water supply tank is arranged on the first floor above ground and is located in the first floor area outside the above-mentioned structural module, so as to meet the requirements of system operation. And being arranged on the first floor above ground can better meet its seismic requirements compared with other floors above ground, ensuring that it can still maintain its function under extreme conditions such as earthquakes. Specifically, in this embodiment, the core water supply tank is a component of the passive injection system. The number of core water supply tanks is two, and they are respectively located in the first floor above the first injection valve room 42 and the second injection valve room 44, meeting the height requirements of gravity injection. When the equipment needs to be put into operation after an accident, the boron water in the core water supply tank can be injected into the core passively by gravity through the pipelines in the first injection valve room 42 and the second injection valve room 44.

[0047] See also Figure 5 In one embodiment of the reactor building layout method of the present invention, the second floor above ground is the main water supply layer. The main water supply pipeline enters the reactor building area in the second floor above ground from outside the containment and enters the steam generator compartments of the three loops respectively to connect the steam generators of the three loops. Furthermore, the third floor above ground is the refueling operation platform layer, which is used to perform nuclear fuel replacement operations. At the same time, the third floor above ground is the main steam pipeline layer, and the pipelines connected to the main equipment steam generator are centrally connected from the third floor above ground to the outside of the containment. Placing the main water supply pipeline and the main steam pipeline on different floors can reduce possible harmful interactions between them. At the same time, it can more effectively utilize space, reduce conflicts between pipelines, and facilitate maintenance and overhaul work.

[0048] See also Figure 6 In one embodiment of the reactor building layout method of the present invention, the fourth floor above ground is the main ventilation fan layer of the reactor building. The main fan of the containment cooling ventilation system and related equipment are arranged on the fourth floor above ground, and can be extended and arranged in other floors according to design requirements to maintain the air quality and temperature inside the reactor building and ensure the safety of equipment and personnel. Specifically, the containment cooling ventilation system includes a main fan and an air-conditioning unit. The main fan is arranged on the fourth floor above ground, and the air-conditioning unit is arranged on the fifth floor above ground, and is located at the top of the steam generator compartment of the second-loop main equipment compartment and the steam generator compartment of the third-loop main equipment compartment.

[0049] See also Figure 7In one embodiment of the reactor building layout method of the present invention, the fifth floor above ground is the layout layer of the passive containment heat extraction system. The evaporator 11 of the passive containment heat extraction system is arranged on the fifth floor above ground along the circumferential direction of the containment steel lining. After an accident, the heat in the containment is effectively extracted in a passive manner to avoid overpressure of the containment. At the same time, the circumferential arrangement can extract the heat of the containment more evenly, while maximizing the heat exchange area of ​​the evaporator and improving the efficiency of heat extraction.

[0050] It should be noted that the above embodiments only exemplarily show the layout of some main equipment and structures of the above key systems such as the reactor coolant system, passive safety injection system, passive residual heat removal system, passive containment heat extraction system, reactor water pool, auxiliary function room, main steam pipeline and main feed water pipeline in the reactor building. The various parts and connection relationships refer to the existing structure, but the plane layout and spatial layout position in the reactor building have been changed. Therefore, its substantive content is not described in detail here. The layout of other systems, equipment, pipelines, auxiliary function rooms, personnel passages, etc. can be arranged by technicians in this field based on the above layout scheme according to actual needs and design requirements, and reasonable layout and design can be carried out in combination with the design safety regulations of nuclear power plants and the specific operating conditions of nuclear power plants.

[0051] The present invention also provides a reactor building arranged using the arrangement method described in any of the above embodiments. The reactor building adopts a typical three-loop overall layout structure of a reactor coolant system, with the reactor coolant system sunk, and core equipment such as the high-level refueling water tank of the passive safety injection system arranged inside the containment, and part of the building structure adopts a modular design, thereby improving the reliability of the system and the speed of building construction, while further improving the seismic performance of the reactor coolant system. The reactor plant coolant system arranged at a low position can meet the requirement of submerging the entire reactor core in a passive manner after an accident, thereby improving the inherent safety of the power plant.

[0052] The present invention also provides a nuclear power plant, which includes a reactor building arranged using the above-mentioned arrangement method. It should be noted that the nuclear power plant also includes a fuel building, an electrical building, a nuclear auxiliary building, an emergency diesel generator building and other existing technology building structures and the equipment arranged therein, which will not be described in detail here.

[0053] In the reactor building and its arrangement method, and the nuclear power plant provided by the present invention, by arranging the core equipment of the passive dedicated safety system in the containment, the safety-related dedicated safety system can rely on the containment to resist external disasters, and the system does not need to switch between the inside and outside of the containment during operation, thereby greatly improving the reliability of the system. At the same time, the reactor building of the present invention adopts a modular structural integration method to increase the speed of building construction and improve economic efficiency. Thereby, the passive dedicated safety system is arranged in the containment. Therefore, the present invention effectively overcomes some practical problems in the prior art and has a high utilization value and use significance.

[0054] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A reactor plant layout method, characterized in that: include: The reactor building facade space is divided into levels in the vertical direction, and the levels at least include the third underground level, the second underground level, and the first underground level, which are arranged in order from bottom to top below the ground; Arranging a reactor pit and a containment pit in the third underground layer, arranging a reactor pressure vessel in the reactor pit, and setting the containment pit at the periphery of the reactor pit; The first loop main equipment compartment, the second loop main equipment compartment, and the third loop main equipment compartment are sequentially arranged around the reactor pit on and above the second underground floor; Arranging main equipment of a plurality of reactor coolant systems in the first loop main equipment compartment, the second loop main equipment compartment, and the third loop main equipment compartment respectively; The high-level refueling water tank compartment is arranged at and above the first underground layer, and the high-level refueling water tank of the passive safety injection system is arranged in the high-level refueling water tank compartment, so that the water in the high-level refueling water tank can submerge the reactor pit and the main equipment of the reactor coolant system under the action of gravity.

2. The reactor building layout method according to claim 1, characterized in that: Any one or more of the first-loop main equipment compartment, the second-loop main equipment compartment, the third-loop main equipment compartment, and the high-position refueling water tank compartment are assembled using structural modules.

3. The reactor building layout method according to claim 1, characterized in that: The first injection box compartment and the first injection valve room are arranged in the second underground layer between the first-loop main equipment compartment and the third-loop main equipment compartment; the second injection box compartment and the second injection valve room are arranged in the second underground layer between the second-loop main equipment compartment and the third-loop main equipment compartment.

4. The reactor building layout method according to claim 2, characterized in that: A residual discharge system functional room is arranged in the first underground layer between the structural module of the high-level refueling water tank compartment, the structural module of the first-loop main equipment compartment and the inner wall of the reactor building; a chemical volume system functional room is arranged in the first underground layer between the structural module of the second-loop main equipment compartment and the inner wall of the reactor building.

5. The reactor building layout method according to claim 2, characterized in that: The levels also include a first above-ground layer sequentially arranged above the first underground layer; a reactor refueling water pool is arranged on and above the first above-ground layer; the reactor refueling water pool is arranged in the reactor refueling water pool compartment, and the reactor refueling water pool is located directly above the reactor pressure vessel.

6. The reactor building layout method according to claim 5, characterized in that: The core water supply tank of the passive safety injection system is arranged on the first aboveground layer.

7. The reactor building layout method according to claim 5, characterized in that: The reactor refueling pool compartment is assembled by structural modules.

8. The reactor building layout method according to claim 4, characterized in that: The hierarchy also includes a second above-ground layer arranged in sequence above the first above-ground layer; the main water supply pipeline is concentrated from outside the reactor building into the second above-ground layer and then connected to a plurality of main equipment of the reactor coolant system respectively.

9. The reactor building layout method according to claim 8, characterized in that: The levels also include a third above-ground layer sequentially arranged above the second above-ground layer; a main steam pipeline connected to a plurality of main equipment of the reactor coolant system is centrally connected to the outside of the reactor building from the third above-ground layer.

10. The reactor building layout method according to claim 8, characterized in that: The hierarchy also includes a fourth above-ground layer sequentially arranged above the third above-ground layer; a main fan of the containment cooling and ventilation system is arranged on the fourth above-ground layer.

11. The reactor building layout method according to claim 10, characterized in that: The levels also include a fifth above-ground layer sequentially arranged above the fourth above-ground layer; an evaporator of a passive containment heat removal system is arranged on the fifth above-ground layer along the circumferential direction of the inner wall of the reactor building.

12. A reactor building arranged according to the arrangement method as claimed in any one of claims 1 to 11.

13. A nuclear power plant, characterized in that: Comprising the reactor building as claimed in claim 12.

Images