A nuclear power plant electrical building and method of arranging the same

Abstract

The application provides a nuclear power plant electrical plant and a layout method thereof, and the method comprises the following steps: dividing the space above the 0m level of the electrical plant into a lower electrical instrument equipment area and a mixing area above the lower electrical instrument equipment area, dividing the planar area of the mixing area into an upper electrical instrument equipment area and a process equipment area, arranging electrical instrument equipment of multiple groups of reactor protection and monitoring systems in the lower electrical instrument equipment area, arranging main control equipment for monitoring the electrical instrument equipment of each group of reactor protection and monitoring systems in the upper electrical instrument equipment area, and arranging related equipment of a main steam and main water pipe gallery, a passive containment heat removal system and related equipment of a passive secondary side residual heat removal system in the process equipment area. The application can meet the arrangement requirements of seismic class I electrical instrument equipment and cables, can adapt to single-shell containment design, meet the design height requirements of passive special safety systems of the third generation nuclear power plant, and is well adapted to the overall layout of the third generation nuclear power plant nuclear island.

Description

Technical Field

[0001] This invention relates to the field of nuclear industry technology, specifically to an electrical building for a nuclear power plant and its layout method. Background Technology

[0002] In the nuclear power field, the biggest difference between electrical instrumentation system equipment and process system equipment is that electrical instrumentation system equipment with different redundancy sequences needs to meet physical isolation requirements in order to prevent fire from causing two different redundancy sequences of equipment to lose their functions at the same time. Dividing different areas according to the redundancy sequence of the electrical instrumentation system is one of the most important principles of electrical plant layout.

[0003] Electrical and instrumentation equipment can be divided into seismic-resistant Class I equipment and non-seismic-resistant Class I equipment. In principle, seismic-resistant Class I equipment should be installed in seismic-resistant Class I buildings, while there is no such requirement for non-seismic-resistant Class I equipment. Since seismic-resistant Class I buildings are expensive, their size should be reduced as much as possible to lower the civil engineering costs of nuclear power plants.

[0004] As safety requirements in the nuclear power sector become increasingly stringent, in addition to extending the lifespan of existing second-generation units and constructing additional second-generation+ units, the focus of the new wave of nuclear power construction is on adopting safer and more advanced third-generation nuclear power units. Third-generation nuclear power units place new demands on the overall layout of equipment within nuclear power plants. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art by providing a nuclear power plant electrical building and its layout method that is adapted to the technological innovation of third-generation nuclear power plants and can accommodate seismic Class I electrical instrumentation systems and some process system items.

[0006] The technical solution adopted to solve the technical problem of this invention is:

[0007] This invention provides a method for arranging the electrical building of a nuclear power plant, comprising:

[0008] The space above the 0m elevation of the electrical workshop is divided into an area for lower electrical equipment and a mixed area above the lower electrical equipment area. The mixed area is further divided into an area for upper electrical equipment and a process equipment area.

[0009] The electrical and instrumentation equipment of multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area, and the relevant equipment, including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system, is arranged in the process equipment area.

[0010] Optionally, the plan area of ​​the lower electrical and instrumentation equipment area is divided into a main electrical and instrumentation equipment area located near the reactor building, and the plan area of ​​the main electrical and instrumentation equipment area is further divided into multiple electrical and instrumentation zones corresponding to multiple reactor protection and monitoring systems. The electrical and instrumentation equipment of each reactor protection and monitoring system is installed in the corresponding electrical and instrumentation zone.

[0011] A ring corridor is set up between the main electrical and instrumentation equipment area and the reactor building, and partition walls are set up in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of reactor protection and monitoring system electrical and instrumentation equipment leading to the reactor building are set in the corresponding dedicated cable zones.

[0012] Optionally, the space of the electrical equipment area can be divided into three floors, from top to bottom: the first floor, the second floor, and the third floor.

[0013] The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply.

[0014] The monitoring equipment for each reactor protection and monitoring system is located on the third floor of the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor of the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor of the corresponding electrical and instrumentation zone.

[0015] Optionally, multiple electrical equipment zones are arranged in a straight line, with the middle of the first annular corridor bordering the main electrical equipment zone, so that the area of ​​the lower electrical equipment zone located between the first annular corridor and the main electrical equipment zone is divided into a first backup zone and a second backup zone.

[0016] The ground floor of the first standby zone is designated as an exhaust fan room to house battery exhaust equipment. The ground floor of the second standby zone is divided into two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, housing reactor shutdown circuit breakers and pump shutdown circuit breakers respectively.

[0017] The second floor of the first backup zone will be used as the first cable room to house cables for other buildings near the first backup zone to access the reactor building and / or electrical building. Within the second backup zone, one second pump shutdown circuit breaker room and two second cable rooms will be separated on the second floor to house pump shutdown circuit breakers and cables for other buildings near the second backup zone to access the reactor building and / or electrical building.

[0018] The first backup zone's three floors above ground are designated as the first power supply cabinet room to house power supply equipment that supplies power to other buildings near the first backup zone. The second backup zone's three floors above ground are divided into a second power supply cabinet room and a third cable room, which are respectively used to house power supply equipment that supplies power to other buildings near the second backup zone, as well as cables for the reactor building and / or electrical building to and from other buildings near the second backup zone.

[0019] Optionally, a third backup area can be designated in the plan area of ​​the main electrical equipment area, located away from the reactor building, and a first corridor can be set up between the third backup area and the main electrical equipment area.

[0020] Within the ground floor of the third backup zone, a backup battery room and a first low-voltage distribution room are separated. The backup battery room houses backup batteries electrically connected to the main battery, while the first low-voltage distribution room houses first low-voltage distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the battery room and the low-voltage distribution room.

[0021] Within the second floor of the third backup zone, a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room are separated. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the UPS power distribution room and the second low-voltage power distribution room.

[0022] Within the three floors above ground of the third backup zone, a fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room are separated. The fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets are respectively arranged there. An area for elevators, a vestibule, and hoisting openings is reserved between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

[0023] Optionally, the mixed zone space is divided into seven floors, from bottom to top: four floors above ground, five floors above ground, six floors above ground, seven floors above ground, eight floors above ground, nine floors above ground, and ten floors above ground. However, there is no floor slab between the fourth and fifth floors of the process equipment area.

[0024] The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls.

[0025] The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened on the floor slabs of the sixth floor of each of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones is isolated into silencer rooms, main steam ventilation rooms, turbine room bypass system pipeline rooms, main steam safety valve discharge pipeline rooms, and passive containment heat removal system pipeline rooms. Silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops are arranged in these rooms.

[0026] The piping for the passive containment heat removal system, as well as the heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system, are located on the eighth floor above ground.

[0027] The pool for the passive containment heat removal system is located on the ninth floor above ground.

[0028] Optionally, the fourth and fifth floors of the electrical equipment area can be divided into a main control equipment area located near the reactor building and a fourth backup area located away from the reactor building, with a second corridor connecting the fourth backup area and the main control equipment area.

[0029] A fire equipment room is separated on the fourth floor of the fourth standby area, and an area for elevators, anterooms and hoisting holes is reserved. Fire equipment is installed in the fire equipment room. On the fourth floor of the main control equipment area, a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room are separated. The cables from the remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems to the main control room, the fire linkage control equipment, and the non-safety grade cables from other buildings to the reactor building are respectively installed.

[0030] The living area and toilets are separated on the fifth floor of the fourth backup area, and areas for elevators, anterooms and hoisting holes are reserved. The main control room, shift leader's room, technical support center room and computer room are separated on the fifth floor of the main control equipment area.

[0031] On the sixth floor of the electrical equipment area, the main control room ventilation system air storage tank room and the cold storage air conditioning room are separated, with the air storage tank of the main control room ventilation system and the cold storage air conditioning equipment that releases cold air into the main control room respectively.

[0032] Optionally, fresh air handling units, air conditioning units, and battery exhaust units for the electrical plant can be installed in the space below the 0m elevation of the electrical plant, and an interface area for the nuclear island pipe gallery can be reserved.

[0033] The present invention also provides an electrical building for a nuclear power plant, comprising:

[0034] The space above the 0m elevation of the electrical plant includes a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area includes an upper electrical equipment area and a process equipment area.

[0035] The electrical and instrumentation equipment for multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, while the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area. This includes the main steam and feedwater pipe corridor, the relevant equipment of the passive containment heat removal system, and the relevant equipment of the passive secondary side residual heat removal system, which are arranged in the process equipment area.

[0036] Optionally, the planar area of ​​the lower electrical and instrumentation equipment area includes the main electrical and instrumentation equipment area located near the reactor building. The planar area of ​​the main electrical and instrumentation equipment area includes multiple electrical and instrumentation zones corresponding one-to-one with multiple sets of reactor protection and monitoring systems. The electrical and instrumentation equipment of each set of reactor protection and monitoring systems is set in the corresponding electrical and instrumentation zone.

[0037] A ring corridor is provided between the main electrical and instrumentation equipment area and the reactor building. Partition walls are installed in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of electrical and instrumentation equipment of the reactor protection and monitoring system leading to the reactor building are set in the corresponding dedicated cable zone.

[0038] Optionally, the space of the electrical equipment area is divided into three floors, from top to bottom: the first floor, the second floor, and the third floor.

[0039] The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply.

[0040] The monitoring equipment for each reactor protection and monitoring system is located on the third floor above ground in the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor above ground in the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor above ground in the corresponding electrical and instrumentation zone.

[0041] Optionally, multiple electrical equipment zones are arranged in a straight line, with the middle of the first annular corridor bordering the main electrical equipment zone, so that the area of ​​the lower electrical equipment zone located between the first annular corridor and the main electrical equipment zone is divided into a first backup zone and a second backup zone.

[0042] The ground floor of the first standby zone is a ventilation room, which houses battery ventilation equipment. The ground floor of the second standby zone includes two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, which are equipped with reactor shutdown circuit breakers and pump shutdown circuit breakers, respectively.

[0043] The first backup zone's second floor is the first cable room, which houses cables for other buildings near the first backup zone to access the reactor building and / or electrical buildings. The second floor of the second backup zone includes one second pump shutdown circuit breaker room and two second cable rooms, each housing pump shutdown circuit breakers and cables for other buildings near the second backup zone to access the reactor building and / or electrical buildings.

[0044] The first backup zone has three floors above ground, which is the first power supply cabinet room, where power supply equipment is arranged to supply power to other buildings near the first backup zone. The second backup zone has three floors above ground, which includes the second power supply cabinet room and the third cable room, where power supply equipment to supply power to other buildings near the second backup zone is arranged, as well as cables for the reactor building and / or electrical building to enter and exit other buildings near the second backup zone.

[0045] Optionally, the plan area of ​​the main electrical and instrumentation equipment area includes a third backup area located away from the reactor building, and a first corridor is provided between the third backup area and the main electrical and instrumentation equipment area.

[0046] The ground floor of the third backup zone includes a backup battery room and a first low-voltage distribution room. The backup battery room houses backup batteries electrically connected to the main battery. The first low-voltage distribution room houses first low-voltage distribution equipment that supplies power to the low-voltage loads of the electrical workshop and / or other workshops. There is an area for an elevator, a vestibule, and a hoisting opening between the battery room and the low-voltage distribution room.

[0047] The second floor of the third backup zone includes a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An elevator, vestibule, and hoisting opening area connects the UPS power distribution room and the second low-voltage power distribution room.

[0048] The three floors above ground of the third backup zone include an automatic fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room. The backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room are respectively equipped with an automatic fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets. There is an elevator, a vestibule, and a hoisting hole area between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

[0049] Optionally, the mixed zone comprises seven floors, from bottom to top: four, five, six, seven, eight, nine, and ten floors above ground. There is no floor slab between the fourth and fifth floors of the process equipment area.

[0050] The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls.

[0051] The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened in the floor slabs of the sixth floor of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones includes a silencer room, a main steam ventilation room, a turbine room bypass system pipeline room, a main steam safety valve discharge pipeline room, and a passive containment heat removal system pipeline room, which are respectively equipped with silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops.

[0052] The eight floors above ground are equipped with piping for the passive containment heat removal system, as well as heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system.

[0053] The nine floors above ground are equipped with a water tank for the passive containment heat removal system.

[0054] Optionally, the fourth and fifth floors of the power supply equipment area include a main control equipment area located near the reactor building and a fourth backup area located away from the reactor building. A second corridor is provided between the fourth backup area and the main control equipment area.

[0055] The fourth reserve area has a fire equipment room, elevator, anteroom and hoisting hole area on the four floors above ground. The fire equipment room is equipped with fire equipment. The main control equipment area has four floors above ground including a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room. The remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems are respectively arranged with cables leading to the main control room, fire linkage control equipment, and non-safety grade cables from other buildings to the reactor building.

[0056] The fifth floor of the fourth backup area includes a living area, toilets and elevators, an anteroom and hoisting hole area; the fifth floor of the main control equipment area includes a main control room, a shift leader's room, a technical support center room and a computer room.

[0057] The six floors above ground of the instrumentation area include a main control room ventilation system storage tank room and a cold storage air conditioning room, which respectively house the control room ventilation system storage tank and the cold storage air conditioning equipment that releases cold air into the main control room.

[0058] Optionally, the space below the 0m elevation of the electrical plant is equipped with a fresh air handling unit, an air conditioning unit, and a battery exhaust fan unit, and an interface area for the nuclear island pipe gallery is reserved.

[0059] To adapt to the technological innovation of third-generation nuclear power plants, this invention divides the space above the 0m elevation of the electrical building into a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area is further divided into an upper electrical equipment area and a process equipment area. The electrical equipment of multiple reactor protection and monitoring systems is placed in the lower electrical equipment area, while the main control equipment that monitors the electrical equipment of each reactor protection and monitoring system is placed in the upper electrical equipment area. The relevant equipment, including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system, is arranged in the process equipment area. In other words, the electrical building of this invention centrally arranges Class I seismic-resistant electrical equipment and instruments, while accommodating the main feedwater and main steam, the passive containment heat removal system, and the passive secondary side residual heat removal system. This satisfies the layout requirements of Class I seismic-resistant electrical equipment and instruments and cables, and can adapt to single-shell containment design. It also meets the design height requirements of the passive dedicated safety system of third-generation nuclear power plants, and is well adapted to the overall layout of the nuclear island of third-generation nuclear power plants. This reduces the cost of the seismic-resistant building and saves on the civil engineering investment of the nuclear power plant. Attached Figure Description

[0060] Figure 1 This is a layout diagram of the underground floor of the electrical plant of the present invention.

[0061] Figure 2 This is a layout diagram of the first floor of the electrical workshop of the present invention.

[0062] Figure 3 This is a layout diagram of the two floors of the electrical workshop of the present invention.

[0063] Figure 4 This is a layout diagram of the three-story electrical workshop of the present invention.

[0064] Figure 5 This is a layout diagram of the four floors above ground of the electrical plant of the present invention.

[0065] Figure 6 This is a layout diagram of the five floors above ground of the electrical plant of the present invention.

[0066] Figure 7 This is a layout diagram of the six-story electrical plant building of the present invention.

[0067] Figure 8 This is a layout diagram of the seven-story electrical plant building of the present invention.

[0068] Figure 9 This is a layout diagram of the eight-story electrical plant building of the present invention.

[0069] Figure 10 This is a layout diagram of the nine-story electrical plant building of the present invention. Detailed Implementation

[0070] The technical solutions of the invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without creative effort are within the scope of the invention.

[0071] In the description of this invention, it should be noted that the use of terms such as "above" to indicate orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the purpose of facilitating and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0072] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0073] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection," "setting," "installation," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0074] This invention provides a method for arranging the electrical building of a nuclear power plant, comprising:

[0075] The space above the 0m elevation of the electrical workshop is divided into an area for lower electrical equipment and a mixed area above the lower electrical equipment area. The mixed area is further divided into an area for upper electrical equipment and a process equipment area.

[0076] The electrical and instrumentation equipment of multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area, and the relevant equipment, including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system, is arranged in the process equipment area.

[0077] The present invention also provides an electrical building for a nuclear power plant, comprising:

[0078] The space above the 0m elevation of the electrical plant includes a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area includes an upper electrical equipment area and a process equipment area.

[0079] The electrical and instrumentation equipment for multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, while the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area. This includes the main steam and feedwater pipe corridor, the relevant equipment of the passive containment heat removal system, and the relevant equipment of the passive secondary side residual heat removal system, which are arranged in the process equipment area.

[0080] Example 1:

[0081] This embodiment provides a method for arranging the electrical building of a nuclear power plant, including:

[0082] The space above the 0m elevation of the electrical workshop is divided into an area for lower electrical equipment and a mixed area above the lower electrical equipment area. The mixed area is further divided into an area for upper electrical equipment and a process equipment area.

[0083] The electrical and instrumentation equipment of multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area, and the relevant equipment, including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system, is arranged in the process equipment area.

[0084] Therefore, to adapt to the technological innovation of third-generation nuclear power plants, this invention divides the space above the 0m elevation of the electrical building into a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area is divided into an upper electrical equipment area and a process equipment area. The electrical equipment of multiple reactor protection and monitoring systems is set in the lower electrical equipment area, and the main control equipment that monitors the electrical equipment of each reactor protection and monitoring system is set in the upper electrical equipment area. The relevant equipment, including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system, is arranged in the process equipment area. In other words, the electrical building of this invention centrally arranges Class I seismic-resistant electrical equipment and instruments, while accommodating the main feedwater and main steam, the passive containment heat removal system, and the passive secondary side residual heat removal system. This satisfies the layout requirements of Class I seismic-resistant electrical equipment and instruments and cables, and can adapt to single-shell containment design. It also meets the design height requirements of the passive dedicated safety system of third-generation nuclear power plants, and is well adapted to the overall layout of the nuclear island of third-generation nuclear power plants. This reduces the cost of the seismic-resistant building and saves on the civil engineering investment of the nuclear power plant.

[0085] In this embodiment, the planar area of ​​the lower electrical and instrumentation equipment area is divided into a main electrical and instrumentation equipment area located near the reactor building. Furthermore, the planar area of ​​the main electrical and instrumentation equipment area is divided into multiple electrical and instrumentation zones corresponding to multiple reactor protection and monitoring systems. The electrical and instrumentation equipment of each reactor protection and monitoring system is installed within its corresponding electrical and instrumentation zone.

[0086] A ring corridor is set up between the main electrical and instrumentation equipment area and the reactor building, and partition walls are set up in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of reactor protection and monitoring system electrical and instrumentation equipment leading to the reactor building are set in the corresponding dedicated cable zones.

[0087] This invention divides the planar area of ​​the main electrical equipment area into separate zones to accommodate the electrical equipment of the corresponding sequence of reactor protection and monitoring systems. An arc-shaped corridor is set between the electrical building and the reactor building for the arrangement of electrical penetrations. Partition walls are set inside the corridor to physically isolate the electrical penetrations between different sequences, thereby satisfying the physical isolation of redundant sequences of reactor protection and monitoring system equipment and cable channels in passive nuclear power plants.

[0088] In this embodiment, the space of the electrical equipment area is divided into three levels, from top to bottom: the first floor, the second floor, and the third floor.

[0089] The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply.

[0090] The monitoring equipment for each reactor protection and monitoring system is located on the third floor of the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor of the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor of the corresponding electrical and instrumentation zone.

[0091] This invention designs electrical workshops based on the main wiring logic of electrical equipment, resulting in smooth cable channels and good isolation.

[0092] In this embodiment, multiple electrical instrumentation zones are arranged in a straight line, with the middle of the first annular corridor bordering the main electrical instrumentation zone. This divides the area between the first annular corridor and the main electrical instrumentation zone into a first backup zone and a second backup zone.

[0093] The ground floor of the first standby zone is designated as an exhaust fan room to house battery exhaust equipment. The ground floor of the second standby zone is divided into two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, housing reactor shutdown circuit breakers and pump shutdown circuit breakers respectively.

[0094] The second floor of the first backup zone will be used as the first cable room to house cables for other buildings near the first backup zone to access the reactor building and / or electrical building. Within the second backup zone, one second pump shutdown circuit breaker room and two second cable rooms will be separated on the second floor to house pump shutdown circuit breakers and cables for other buildings near the second backup zone to access the reactor building and / or electrical building.

[0095] The first backup zone's three floors above ground are designated as the first power supply cabinet room to house power supply equipment that supplies power to other buildings near the first backup zone. The second backup zone's three floors above ground are divided into a second power supply cabinet room and a third cable room, which are respectively used to house power supply equipment that supplies power to other buildings near the second backup zone, as well as cables for the reactor building and / or electrical building to and from other buildings near the second backup zone.

[0096] In this embodiment, a third backup area is set up in the plane area of ​​the electrical equipment area, which is far away from the reactor building. A first corridor is set up between the third backup area and the main electrical equipment area. This can protect the protection sequence from the impact of external impacts and also physically isolate it from the protection sequence.

[0097] Within the ground floor of the third backup zone, a backup battery room and a first low-voltage distribution room are separated. The backup battery room houses backup batteries electrically connected to the main battery, while the first low-voltage distribution room houses first low-voltage distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the battery room and the low-voltage distribution room.

[0098] Within the second floor of the third backup zone, a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room are separated. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the UPS power distribution room and the second low-voltage power distribution room.

[0099] Within the three floors above ground of the third backup zone, a fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room are separated. The fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets are respectively arranged there. An area for elevators, a vestibule, and hoisting openings is reserved between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

[0100] In this embodiment, the space of the mixing area is divided into seven floors, from bottom to top: the fourth floor, the fifth floor, the sixth floor, the seventh floor, the eighth floor, the ninth floor, and the tenth floor. There is no floor slab between the fourth and fifth floors of the process equipment area.

[0101] The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls.

[0102] The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened on the floor slabs of the sixth floor of each of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones is isolated into silencer rooms, main steam ventilation rooms, turbine room bypass system pipeline rooms, main steam safety valve discharge pipeline rooms, and passive containment heat removal system pipeline rooms. Silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops are arranged in these rooms.

[0103] The piping for the passive containment heat removal system, as well as the heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system, are located on the eighth floor above ground.

[0104] The pool for the passive containment heat removal system is located on the ninth floor above ground.

[0105] In this embodiment, the floor plan of the fourth and fifth floors of the power supply equipment area is divided into a main control equipment area located close to the reactor building and a fourth backup area located away from the reactor building. A second corridor is set between the fourth backup area and the main control equipment area.

[0106] A fire equipment room is separated on the fourth floor of the fourth standby area, and an area for elevators, anterooms and hoisting holes is reserved. Fire equipment is installed in the fire equipment room. On the fourth floor of the main control equipment area, a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room are separated. The cables from the remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems to the main control room, the fire linkage control equipment, and the non-safety grade cables from other buildings to the reactor building are respectively installed.

[0107] The living area and toilets are separated on the fifth floor of the fourth backup area, and areas for elevators, anterooms and hoisting holes are reserved. The main control room, shift leader's room, technical support center room and computer room are separated on the fifth floor of the main control equipment area.

[0108] On the sixth floor of the electrical equipment area, the main control room ventilation system air storage tank room and the cold storage air conditioning room are separated, with the air storage tank of the main control room ventilation system and the cold storage air conditioning equipment that releases cold air into the main control room respectively.

[0109] In this embodiment, the fresh air handling unit, air conditioning unit and battery exhaust unit of the electrical plant are installed in the space below the 0m elevation of the electrical plant, and an interface area with the nuclear island pipe gallery is reserved.

[0110] In summary, the nuclear power plant electrical building of this invention houses the electrical and instrumentation systems and process systems. The electrical and instrumentation systems include low-voltage equipment, DC and UPS equipment, battery banks, reactor protection and monitoring system cabinets, automatic fire alarm cabinets and fire-fighting linkage control cabinets, data acquisition and processing cabinets, multi-function control cabinets, a main control room, and ancillary rooms. The process systems include main steam and feedwater pipe corridors, passive containment heat removal system tanks and pipes, and passive secondary side residual heat removal system heat exchangers and pipes. The building is divided into east and west sections, with the process systems concentrated in the western section. The building has eleven floors in total, including one basement level and ten above-ground levels.

[0111] Figure 1 The diagram shows the layout of the underground floor of the electrical plant of the present invention. The underground floor is equipped with two sets of ventilation units for the electrical area of ​​the electrical plant, including a fresh air unit, an air conditioning unit and a battery exhaust unit, and an interface with the outer pipe corridor of the nuclear island is reserved on the north side of the corridor.

[0112] Figure 2 This is a layout diagram of the first floor of the electrical plant of the present invention, which includes battery rooms. The four safety sequence battery rooms are arranged in a straight line along the reactor building, corresponding to the DC and UPS equipment rooms of the same sequence on the upper and lower floors, facilitating charging between the power cabinets and the batteries. The safety-grade backup battery room is located on the north side of the plant, separated from the four safety sequences by a corridor. The backup battery can replace any group of safety sequence batteries that fails.

[0113] A low-voltage motor load center is also located on the north side of the corridor. The low-voltage motor load center is located near the load according to the principle of decentralized layout, so as to supply power to the low-voltage load of the electrical plant. The pump shutdown circuit breaker and reactor shutdown circuit breaker are located in the lower right corner of the plant. The cables enter the reactor shutdown circuit breaker and pump shutdown circuit breaker through the auxiliary plant and then enter the reactor plant.

[0114] Figure 3 This is a layout diagram of the second floor of the electrical plant of the present invention. The second floor houses DC and UPS equipment rooms. The four safety sequence DC and UPS equipment rooms are arranged in a straight line along the reactor building, corresponding to the reactor protection and monitoring system control cabinets of the same sequence on the upper and lower floors, facilitating the passage of cables of the same sequence between floors. A safety-grade backup DC and UPS equipment room is located on the north side of the plant, separated from the four safety sequences by a corridor. The backup DC and UPS distribution cabinet can replace any set of faulty safety sequence DC and UPS distribution cabinets. A low-voltage motor load center is also located on the north side of the corridor. The pump shutdown circuit breaker is located in the lower right corner of the plant, corresponding to the pump shutdown circuit breaker on the first floor on the upper and lower floors.

[0115] Figure 4This is a layout diagram of the three-story electrical building of the present invention. The three floors above ground house the control cabinet rooms for the reactor protection and monitoring system. The control cabinet rooms for the four safety sequences of the reactor protection and monitoring system are arranged in a straight line along the reactor building. The safety-grade cables for the four sequences can enter the main control room through the arc-shaped corridor and the north corridor. The automatic fire alarm equipment room and the dedicated instrumentation and control equipment room are located on the north side of the corridor. Power supply cabinets for powering the control cabinets are located in the lower right and lower left corners of the building.

[0116] Figure 5 This is a layout diagram of the four-story electrical plant of the present invention, which is divided into east and west sections. The west side has three loop main water supply and main steam pipeline compartments, with the main water supply and main steam pipeline corridors arranged on the same floor, and sloping walls are installed to install lateral restraints to limit the lateral displacement of high-energy pipelines; the east side has fire-fighting linkage control cabinets and remote shutdown stations related to safety, with cables that can run directly to the main control room above; the north side of the corridor has fire-fighting equipment room and pipeline room.

[0117] Figure 6 This is a layout diagram of the five-story electrical plant of the present invention, which is divided into east and west sections. The west side is a mezzanine level between the main water supply and main steam pipelines, without a floor slab; the east side is the main control room office area, with the main control room located on the far right of the electrical plant. The shift supervisor's office and technical support center are located to the left of the main control room, the computer room is located to the south of the main control room, and the living area and toilets are located to the north of the main control room. Other supporting rooms for the main control room, such as the isolation office, are located in the auxiliary plant, separated from the main control room only by a corridor. An additional staircase is also provided in the lower right corner of this floor for quick access to the remote decommissioning station.

[0118] Figure 7 This is a layout diagram of the six-story electrical plant of the present invention, which is divided into east and west sections. The east side is the roof, with a passive cold storage air conditioning room located directly above the main control room. Above the shift leader's room and the technical support center, there are gas storage tanks for ventilation and heat dissipation of the main control room in case of an accident. The west side is the main feedwater and main steam hoisting floor. The main feedwater and main steam equipment is large in size and weight and needs to be replaced periodically during its service life, so a hoisting floor was specially designed. Each of the three loop compartments has two hoisting holes, and there is one hoisting hole in the middle and one on the north side. There is no floor slab on the south side.

[0119] Figure 8 This is a layout diagram of the seven-story electrical plant of the present invention, which is divided into east and west sections. The east side is the roof; the three ring-shaped compartments on the west side are arranged in five rows of rooms from south to north, which are respectively arranged as the passive containment heat removal system pipeline room, the main steam safety valve discharge pipeline room, the main steam ventilation room, the turbine bypass system pipeline room, and the silencer compartment. The silencer is arranged on the northernmost side of the plant for heat dissipation. The main steam ventilation room corresponds to the main steam isolation valve on the upper and lower floors, so as to give priority to the heat dissipation of the main steam isolation valve.

[0120] Figure 9 This is a layout diagram of the eight-story electrical plant of the present invention, which is divided into east and west sections. The east side is the roof, and the emergency water tank of the secondary passive waste heat removal system is located near the west side; the heat exchanger of the secondary passive waste heat removal system is located in the lower left corner of the west side, and the pipe and valve room of the passive containment heat removal system is located on the right side.

[0121] Figure 10 The diagram shows the layout of the nine-story electrical workshop of the present invention. A water tank for a passive containment heat removal system is arranged on the west side of the ninth floor, and the water tank can hold up to 1000m3 of water. The tenth floor is the west roof.

[0122] This embodiment also includes a corridor on the north side of the four security sequence equipment rooms for personnel communication and the laying of non-security grade cables, with a staircase located in the middle of the north side of the corridor.

[0123] Example 2:

[0124] This embodiment provides an electrical building for a nuclear power plant. The space above the 0m elevation of the electrical building includes a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area includes an upper electrical equipment area and a process equipment area.

[0125] The electrical and instrumentation equipment for multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, while the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area. This includes the main steam and feedwater pipe corridor, the relevant equipment of the passive containment heat removal system, and the relevant equipment of the passive secondary side residual heat removal system, which are arranged in the process equipment area.

[0126] In this embodiment, the planar area of ​​the lower electrical and instrumentation equipment area includes the main electrical and instrumentation equipment area located near the reactor building. The planar area of ​​the main electrical and instrumentation equipment area includes multiple electrical and instrumentation zones corresponding to multiple sets of reactor protection and monitoring systems. The electrical and instrumentation equipment of each set of reactor protection and monitoring systems is set in the corresponding electrical and instrumentation zone.

[0127] A ring corridor is provided between the main electrical and instrumentation equipment area and the reactor building. Partition walls are installed in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of electrical and instrumentation equipment of the reactor protection and monitoring system leading to the reactor building are set in the corresponding dedicated cable zone.

[0128] In this implementation, the space of the electrical equipment area is divided into three floors, from top to bottom: the first floor, the second floor, and the third floor.

[0129] The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply.

[0130] The monitoring equipment for each reactor protection and monitoring system is located on the third floor above ground in the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor above ground in the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor above ground in the corresponding electrical and instrumentation zone.

[0131] In this implementation, multiple electrical and instrumentation zones are arranged in a straight line. The middle of the first ring corridor borders the main electrical and instrumentation equipment zone, so that the area between the first ring corridor and the main electrical and instrumentation equipment zone is divided into a first backup zone and a second backup zone.

[0132] The ground floor of the first standby zone is a ventilation room, which houses battery ventilation equipment. The ground floor of the second standby zone includes two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, which are equipped with reactor shutdown circuit breakers and pump shutdown circuit breakers, respectively.

[0133] The first backup zone's second floor is the first cable room, which houses cables for other buildings near the first backup zone to access the reactor building and / or electrical buildings. The second floor of the second backup zone includes one second pump shutdown circuit breaker room and two second cable rooms, each housing pump shutdown circuit breakers and cables for other buildings near the second backup zone to access the reactor building and / or electrical buildings.

[0134] The first backup zone has three floors above ground, which is the first power supply cabinet room, where power supply equipment is arranged to supply power to other buildings near the first backup zone. The second backup zone has three floors above ground, which includes the second power supply cabinet room and the third cable room, where power supply equipment to supply power to other buildings near the second backup zone is arranged, as well as cables for the reactor building and / or electrical building to enter and exit other buildings near the second backup zone.

[0135] In this embodiment, the planar area of ​​the main electrical and instrumentation equipment area includes a third backup area located away from the reactor building, and a first corridor is provided between the third backup area and the main electrical and instrumentation equipment area.

[0136] The ground floor of the third backup zone includes a backup battery room and a first low-voltage distribution room. The backup battery room houses backup batteries electrically connected to the main battery. The first low-voltage distribution room houses first low-voltage distribution equipment that supplies power to the low-voltage loads of the electrical workshop and / or other workshops. There is an area for an elevator, a vestibule, and a hoisting opening between the battery room and the low-voltage distribution room.

[0137] The second floor of the third backup zone includes a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An elevator, vestibule, and hoisting opening area connects the UPS power distribution room and the second low-voltage power distribution room.

[0138] The three floors above ground of the third backup zone include an automatic fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room. The backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room are respectively equipped with an automatic fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets. There is an elevator, a vestibule, and a hoisting hole area between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

[0139] In this implementation, the mixed area comprises seven floors, from bottom to top: four floors above ground, five floors above ground, six floors above ground, seven floors above ground, eight floors above ground, nine floors above ground, and ten floors above ground. There is no floor slab between the fourth and fifth floors of the process equipment area.

[0140] The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls.

[0141] The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened in the floor slabs of the sixth floor of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones includes a silencer room, a main steam ventilation room, a turbine room bypass system pipeline room, a main steam safety valve discharge pipeline room, and a passive containment heat removal system pipeline room, which are respectively equipped with silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops.

[0142] The eight floors above ground are equipped with piping for the passive containment heat removal system, as well as heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system.

[0143] The nine floors above ground are equipped with a water tank for the passive containment heat removal system.

[0144] In this embodiment, the above-ground fourth and fifth floors of the power supply equipment area include a main control equipment area located near the reactor building, and a fourth backup area located away from the reactor building. A second corridor is provided between the fourth backup area and the main control equipment area.

[0145] The fourth reserve area has a fire equipment room, elevator, anteroom and hoisting hole area on the four floors above ground. The fire equipment room is equipped with fire equipment. The main control equipment area has four floors above ground including a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room. The remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems are respectively arranged with cables leading to the main control room, fire linkage control equipment, and non-safety grade cables from other buildings to the reactor building.

[0146] The fifth floor of the fourth backup area includes a living area, toilets and elevators, an anteroom and hoisting hole area; the fifth floor of the main control equipment area includes a main control room, a shift leader's room, a technical support center room and a computer room.

[0147] The six floors above ground of the instrumentation area include a main control room ventilation system storage tank room and a cold storage air conditioning room, which respectively house the control room ventilation system storage tank and the cold storage air conditioning equipment that releases cold air into the main control room.

[0148] In this implementation, the space below the 0m elevation of the electrical plant is equipped with a fresh air handling unit, an air conditioning unit, and a battery exhaust fan unit, and an interface area with the nuclear island pipe gallery is reserved.

[0149] In summary, the electrical building layout of this nuclear power plant, in coordination with the auxiliary buildings, centrally houses Class I seismic-resistant electrical and instrumentation equipment. Four sequences of electrical and instrumentation equipment are arranged in a straight line along the reactor building. An arc-shaped corridor is provided between the electrical building and the reactor building for the arrangement and isolation of electrical penetrations. This satisfies the physical isolation requirements for four redundant sequences of passive nuclear power plant reactor protection and monitoring system equipment and cable channels. Furthermore, it accommodates process systems including the main steam and feedwater pipe corridor, the passive containment heat removal system tank and piping, and the passive secondary side residual heat removal system heat exchanger and piping. The main steam and feedwater are arranged on the same floor, and a passive safety system tank is installed on the roof of the building. This allows for adaptation to a single-shell containment design, meeting the physical isolation requirements for electrical penetrations and the design height requirements for the dedicated passive safety system tank.

[0150] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method of arranging an electrical plant of a nuclear power plant, characterized in that, include: The space above the 0m elevation of the electrical workshop is divided into an area for lower electrical equipment and a mixed area above the lower electrical equipment area. The mixed area is further divided into an area for upper electrical equipment and a process equipment area. The electrical and instrumentation equipment of multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area, and the relevant equipment including the main steam and feedwater pipe corridor, the passive containment heat removal system, and the passive secondary side residual heat removal system are arranged in the process equipment area. The plan area of ​​the electrical and instrumentation equipment area is divided into a main electrical and instrumentation equipment area located near the reactor building. This main electrical and instrumentation equipment area is further divided into multiple electrical and instrumentation zones, each corresponding to one of the multiple reactor protection and monitoring systems. The electrical and instrumentation equipment for each reactor protection and monitoring system is then placed within its corresponding electrical and instrumentation zone. A ring corridor is set up between the main electrical and instrumentation equipment area and the reactor building, and partition walls are set up in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of reactor protection and monitoring system electrical and instrumentation equipment leading to the reactor building are set in the corresponding dedicated cable zones. The space of the electrical equipment area is divided into three floors, from top to bottom: the first floor, the second floor, and the third floor.

2. The nuclear power plant electrical plant building arrangement method according to claim 1, characterized by, The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply. The monitoring equipment for each reactor protection and monitoring system is located on the third floor of the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor of the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor of the corresponding electrical and instrumentation zone.

3. The arrangement method of the nuclear power plant electrical building according to claim 2, characterized by, The multiple electrical equipment zones are arranged in a straight line, with the middle of the first ring corridor bordering the main electrical equipment zone. This divides the area between the first ring corridor and the main electrical equipment zone into a first backup zone and a second backup zone. The ground floor of the first standby zone is designated as an exhaust fan room to house battery exhaust equipment. The ground floor of the second standby zone is divided into two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, housing reactor shutdown circuit breakers and pump shutdown circuit breakers respectively. The second floor of the first backup zone will be used as the first cable room to house cables for other buildings near the first backup zone to access the reactor building and / or electrical building. Within the second backup zone, one second pump shutdown circuit breaker room and two second cable rooms will be separated on the second floor to house pump shutdown circuit breakers and cables for other buildings near the second backup zone to access the reactor building and / or electrical building. The first backup zone's three floors above ground are designated as the first power supply cabinet room to house power supply equipment that supplies power to other buildings near the first backup zone. The second backup zone's three floors above ground are divided into a second power supply cabinet room and a third cable room, which are respectively used to house power supply equipment that supplies power to other buildings near the second backup zone, as well as cables for the reactor building and / or electrical building to and from other buildings near the second backup zone.

4. The arrangement method of the nuclear power plant electrical building according to claim 3, characterized by, A third backup area is designated, located away from the reactor building, within the floor plan of the main electrical equipment area. A first corridor is established between the third backup area and the main electrical equipment area. Within the ground floor of the third backup zone, a backup battery room and a first low-voltage distribution room are separated. The backup battery room houses backup batteries electrically connected to the main battery, while the first low-voltage distribution room houses first low-voltage distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the battery room and the low-voltage distribution room. Within the second floor of the third backup zone, a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room are separated. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An area for an elevator, vestibule, and hoisting opening is reserved between the UPS power distribution room and the second low-voltage power distribution room. Within the three floors above ground of the third backup zone, a fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room are separated. The fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets are respectively arranged. An area for elevators, a vestibule, and hoisting openings is reserved between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

5. Arrangement method of a nuclear power plant electrical building according to any one of claims 1 - 4, characterized in that, The mixed-use area is divided into seven floors, from bottom to top: the fourth, fifth, sixth, seventh, eighth, ninth, and tenth floors above ground. There is no floor slab between the fourth and fifth floors of the process equipment area. The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls. The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened on the floor slabs of the sixth floor of each of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones is isolated into silencer rooms, main steam ventilation rooms, turbine room bypass system pipeline rooms, main steam safety valve discharge pipeline rooms, and passive containment heat removal system pipeline rooms. Silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops are arranged in these rooms. The piping for the passive containment heat removal system, as well as the heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system, are located on the eighth floor above ground. The pool for the passive containment heat removal system is located on the ninth floor above ground.

6. The arrangement method of the nuclear power plant electrical building according to claim 5, characterized by, The floor plan of the fourth and fifth floors of the power supply equipment area is divided into a main control equipment area located close to the reactor building and a fourth backup area located away from the reactor building. A second corridor is set up between the fourth backup area and the main control equipment area. A fire equipment room is separated on the fourth floor of the fourth standby area, and an area for elevators, anterooms and hoisting holes is reserved. Fire equipment is installed in the fire equipment room. On the fourth floor of the main control equipment area, a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room are separated. The cables from the remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems to the main control room, the fire linkage control equipment, and the non-safety grade cables from other buildings to the reactor building are respectively installed. The living area and toilets are separated on the fifth floor of the fourth backup area, and areas for elevators, anterooms and hoisting holes are reserved. The main control room, shift leader's room, technical support center room and computer room are separated on the fifth floor of the main control equipment area. On the sixth floor of the electrical equipment area, the main control room ventilation system air storage tank room and the cold storage air conditioning room are separated, with the air storage tank of the main control room ventilation system and the cold storage air conditioning equipment that releases cold air into the main control room respectively.

7. The method of arranging an electrical plant of a nuclear power plant according to any one of claims 1 to 4, characterized in that, The space below the 0m elevation of the electrical plant shall be used to install the fresh air handling unit, air conditioning unit and battery exhaust unit of the electrical plant, and the interface area with the nuclear island pipe gallery shall be reserved.

8. A nuclear power plant electrical building, characterized by include: The space above the 0m elevation of the electrical plant includes a lower electrical equipment area and a mixed area located above the lower electrical equipment area. The planar area of ​​the mixed area includes an upper electrical equipment area and a process equipment area. The electrical and instrumentation equipment of multiple reactor protection and monitoring systems is located in the lower electrical and instrumentation equipment area, while the main control equipment that monitors the electrical and instrumentation equipment of each reactor protection and monitoring system is located in the upper electrical and instrumentation equipment area. This includes the main steam and feedwater pipe corridor, the relevant equipment of the passive containment heat removal system, and the relevant equipment of the passive secondary side residual heat removal system, which are arranged in the process equipment area. The lower electrical and instrumentation equipment area includes the main electrical and instrumentation equipment area located near the reactor building. The main electrical and instrumentation equipment area includes multiple electrical and instrumentation zones corresponding to multiple reactor protection and monitoring systems. The electrical and instrumentation equipment of each reactor protection and monitoring system is located in the corresponding electrical and instrumentation zone. A ring corridor is provided between the main electrical and instrumentation equipment area and the reactor building. Partition walls are installed in the ring corridor to divide the plane area of ​​the ring corridor into multiple dedicated cable zones corresponding to multiple electrical and instrumentation zones. The cables of each group of electrical and instrumentation equipment of the reactor protection and monitoring system leading to the reactor building are set in the corresponding dedicated cable zone. The space of the electrical equipment area is divided into three floors, from top to bottom: the first floor, the second floor, and the third floor.

9. The nuclear power plant electrical building of claim 8, wherein, The electrical equipment of each reactor protection and monitoring system includes monitoring equipment for monitoring the reactor core, a main power supply for supplying power to the monitoring equipment, and a main battery that draws power from the main power supply and provides backup power to the main power supply. The monitoring equipment for each reactor protection and monitoring system is located on the third floor above ground in the corresponding electrical and instrumentation zone. The main power supply equipment for each reactor protection and monitoring system is located on the second floor above ground in the corresponding electrical and instrumentation zone. The main storage battery for each reactor protection and monitoring system is located on the first floor above ground in the corresponding electrical and instrumentation zone.

10. The nuclear power plant electrical building of claim 9, wherein, Multiple electrical instrumentation zones are arranged in a straight line. The middle of the first ring corridor borders the main electrical instrumentation equipment area, thus dividing the area between the first ring corridor and the main electrical instrumentation equipment area into a first backup area and a second backup area. The ground floor of the first standby zone is a ventilation room, which houses the battery ventilation equipment. The ground floor of the second standby zone includes two reactor shutdown circuit breaker rooms and one first pump shutdown circuit breaker room, which are equipped with reactor shutdown circuit breakers and pump shutdown circuit breakers, respectively. The first backup zone's second floor is the first cable room, which houses cables for other buildings near the first backup zone to access the reactor building and / or electrical buildings. The second floor of the second backup zone includes one second pump shutdown circuit breaker room and two second cable rooms, each housing pump shutdown circuit breakers and cables for the reactor building and / or electrical buildings to access other buildings near the second backup zone. The first backup zone has three floors above ground, which is the first power supply cabinet room, where power supply equipment is arranged to supply power to other buildings near the first backup zone. The second backup zone has three floors above ground, which includes the second power supply cabinet room and the third cable room, where power supply equipment to supply power to other buildings near the second backup zone is arranged, as well as cables for the reactor building and / or electrical building to enter and exit other buildings near the second backup zone.

11. The nuclear power plant electrical building of claim 10, wherein, The plan area of ​​the main electrical and instrumentation equipment area includes a third backup area located away from the reactor building, and a first corridor is provided between the third backup area and the main electrical and instrumentation equipment area. The ground floor of the third backup zone includes a backup battery room and a first low-voltage distribution room. The backup battery room houses backup batteries electrically connected to the main battery. The first low-voltage distribution room houses first low-voltage distribution equipment that supplies power to the low-voltage loads of the electrical workshop and / or other workshops. There is an area for an elevator, a vestibule, and a hoisting opening between the battery room and the low-voltage distribution room. The second floor of the third backup zone includes a backup power distribution room, an uninterruptible power supply (UPS) power distribution room, and a second low-voltage power distribution room. The backup power distribution room houses backup safety-grade DC equipment electrically connected to the main power supply equipment. The UPS power distribution room houses UPS equipment supplying power to the DEC equipment. The second low-voltage power distribution room houses second low-voltage power distribution equipment supplying power to the low-voltage loads of the electrical workshop and / or other workshops. An elevator, vestibule, and hoisting opening area connects the UPS power distribution room and the second low-voltage power distribution room. The three floors above ground of the third backup zone include an automatic fire alarm system equipment room, a backup electrical and instrumentation equipment room, and a dedicated instrumentation and control system electronic cabinet room. The backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room are respectively equipped with an automatic fire alarm system, backup electrical and instrumentation equipment, and dedicated instrumentation and control system electronic cabinets. There is an elevator, a vestibule, and a hoisting hole area between the backup electrical and instrumentation equipment room and the dedicated instrumentation and control system electronic cabinet room.

12. The nuclear power plant electrical building according to any of claims 8-11, characterized in that, The mixed zone comprises seven floors, numbered from bottom to top as the fourth, fifth, sixth, seventh, eighth, ninth, and tenth floors above ground. There is no floor slab between the fourth and fifth floors of the process equipment area. The floor plan of the process equipment area, from the fourth to the sixth floor, is divided into three process zones by partition walls. The main feedwater and main steam pipelines of the three loops are respectively located on the fourth and fifth floors above ground in the three process zones. Lifting holes are opened in the floor slabs of the sixth floor of the three process zones to facilitate the maintenance and lifting of the main feedwater and main steam pipelines and their valves. The seventh floor of each of the three process zones includes a silencer room, a main steam ventilation room, a turbine room bypass system pipeline room, a main steam safety valve discharge pipeline room, and a passive containment heat removal system pipeline room, which are respectively equipped with silencers, main steam ventilation equipment, turbine room bypass system pipelines, main steam safety valve discharge pipelines, and passive containment heat removal system pipelines for the corresponding loops. The eight floors above ground are equipped with piping for the passive containment heat removal system, as well as heat exchangers and emergency water supply tanks for the secondary passive waste heat removal system. The nine floors above ground are equipped with a water tank for the passive containment heat removal system.

13. The nuclear power plant electrical building of claim 12, wherein, The above-ground fourth and fifth floors of the power supply equipment area include a main control equipment area located near the reactor building, and a fourth backup area located away from the reactor building. A second corridor is provided between the fourth backup area and the main control equipment area. The fourth reserve area has a fire equipment room, elevator, anteroom and hoisting hole area on the four floors above ground. The fire equipment room is equipped with fire equipment. The main control equipment area has four floors above ground including a remote shutdown station room, a fourth cable room, a fire linkage control cabinet room and a fifth cable room. The remote shutdown station, the monitoring equipment of multiple reactor protection and monitoring systems are respectively arranged with cables leading to the main control room, fire linkage control equipment, and non-safety grade cables from other buildings to the reactor building. The fifth floor of the fourth backup area includes a living area, toilets and elevators, an anteroom and hoisting hole area; the fifth floor of the main control equipment area includes a main control room, a shift leader's room, a technical support center room and a computer room. The six floors above ground of the instrumentation area include a main control room ventilation system storage tank room and a cold storage air conditioning room, which respectively house the control room ventilation system storage tank and the cold storage air conditioning equipment that releases cold air into the main control room.

14. The nuclear power plant electrical building of any of claims 8-11, characterized in that, The space below the 0m elevation of the electrical plant is equipped with fresh air handling units, air conditioning units, and battery exhaust units, and an interface area for connection with the nuclear island pipe gallery is reserved.

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