Layout method of electrical plant in nuclear power plant, electrical plant in nuclear power plant

Abstract

The present invention provides a method for arranging an electrical building for a nuclear power plant, the method comprising: dividing the electrical building space from bottom to top into a non-safety-level equipment area, a safety-level equipment area, and a main control area; dividing the planar area of ​​the safety-level equipment area into zones equal in number to the number of redundancies of the reactor protection and monitoring system; and dividing the space of the safety-level equipment area into three layers, namely, two above-ground layers, one above-ground layer, and one underground layer, from top to bottom; allocating the control equipment of each reactor protection and monitoring system to the second above-ground layer of the corresponding zone; allocating the power supply equipment to the first above-ground layer of the corresponding zone; allocating the battery providing backup power to the first underground layer of the corresponding zone; and allocating the main control equipment for monitoring each control equipment to the main control area. The electrical and instrumentation layout of the present invention achieves good physical isolation, conforms to the logical relationship of the main cable connection, has high structural stability, and has simple functional zoning.

Description

Technical Field

[0001] The present invention relates to the field of nuclear industry, and in particular to a layout method of an electrical plant of a nuclear power plant and an electrical plant of a nuclear power plant. Background Art

[0002] In the nuclear power sector, the electrical building of a nuclear power plant primarily houses electrical systems and instrumentation and control (I&C) equipment and cables. The electrical system ensures safe production and power transmission, providing AC and DC power to loads and instruments within the nuclear island. The I&C system monitors plant-wide equipment and instrument data, and through the main control room, enables unit start-up and shutdown operations, monitors and adjusts operating conditions, and handles accidents, ensuring the normal operation of the nuclear power plant.

[0003] The reactor protection and monitoring system (RPMS) ensures safe shutdown of nuclear power plants in the event of an accident and activates dedicated safety features to protect the integrity of the three major nuclear safety barriers. It is a crucial instrumentation and control system for human and machine safety. The RPM cabinet is also the core of a nuclear power plant's electrical building. Ensuring physical isolation between its different redundancy sequences is a key means of improving its functional reliability. Depending on the reactor design concept, the RPM system can be divided into four-column redundancy and two-column redundancy. The redundant structure of the RPM system determines the redundant structure of the upstream power supply.

[0004] The layout of the electrical plant should prioritize the characteristics of the electrical system and instrumentation and control system equipment, meet the electrical isolation requirements of cable wiring relationships and redundant sequences, and comprehensively consider the overall layout of the nuclear island. However, the existing electrical plant layout of nuclear power plants lacks a logical organization between items and a systematic design approach. This can easily lead to undesirable consequences such as a lack of overall organization of the plant structure, chaotic layout of items within the plant, and poor cable isolation. 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 and to provide an electrical building for a nuclear power plant and its layout method, which has good physical isolation effect for the layout of electrical and instrument equipment, conforms to the logical relationship of the main cable connection, has high structural stability, and has simple functional zoning.

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

[0007] The present invention provides a method for arranging an electrical plant building of a nuclear power plant, comprising:

[0008] The electrical plant space is divided from bottom to top into non-safety equipment area, safety equipment area and main control area.

[0009] The plane area of ​​the safety-level equipment area is divided into electrical and instrument partitions with the same number of redundancy as the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, namely, the second floor above ground, the first floor above ground and the first floor underground.

[0010] The control equipment of each reactor protection and monitoring system is allocated to the second above-ground floor of the corresponding electrical and instrumentation partition; the power supply equipment that supplies power to the control equipment is allocated to the first above-ground floor of the corresponding electrical and instrumentation partition; the battery that obtains electricity from the power supply equipment to provide backup power to the power supply equipment is allocated to the first underground floor of the corresponding electrical and instrumentation partition; the main control equipment that monitors each group of control equipment of the reactor protection and monitoring system is allocated to the main control area.

[0011] Optionally, the four electrical and instrument partitions of the safety-level equipment area are arranged close to the reactor building and divided into two groups. The multiple electrical and instrument partitions in one group are arranged side by side along a first horizontal direction, and the multiple electrical and instrument partitions in the other group are arranged side by side along a second horizontal direction, with the first direction perpendicular to the second direction.

[0012] Optionally, the plane area of ​​the safety-level equipment area is further divided into a first auxiliary area, which is located between the two groups of electrical and instrument partitions and is far away from the reactor building.

[0013] The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment that supplies power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables that introduce external high voltage electricity into each power supply equipment, as well as the cables that connect each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

[0014] Optionally, the plane area of ​​the safety-level equipment area is further divided into a second auxiliary area, which is located between the two groups of electrical and instrument partitions and close to the reactor building.

[0015] The electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant are arranged on the first and second floors above ground in the second auxiliary area, and the pump stop circuit breaker is arranged on the first underground floor in the second auxiliary area.

[0016] Optionally, the plane area of ​​the safety-level equipment area is further divided into a third auxiliary area, and the third auxiliary area is arranged in parallel with multiple electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building.

[0017] The main steam pipeline gallery is arranged on the second floor above ground in the third auxiliary area, the main feed water pipeline gallery is set on the first floor above ground in the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, among which the shutdown circuit breaker is arranged close to the reactor building.

[0018] Optionally, the non-safety equipment area is arranged on the second underground floor of the electrical plant.

[0019] The two rows of non-safety-level power supply equipment of the nuclear power plant are respectively arranged in the positions corresponding to the non-safety-level equipment area and the two groups of electrical instrument partitions. The two rows of fan equipment of the electrical plant electrical instrument area of ​​the nuclear power plant are arranged in the positions corresponding to the non-safety-level equipment area and the first auxiliary area.

[0020] Place the voltage stabilizer heating cabinet in the corresponding position between the non-safety equipment area and the second auxiliary area.

[0021] The evaporator secondary sewage cleaning pump is arranged in the position corresponding to the non-safety-level equipment area and the third auxiliary area.

[0022] Optionally, the main control area is divided into three layers, which are three layers above ground, four layers above ground and five layers underground.

[0023] Ventilation equipment is arranged at the position corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is set at the position corresponding to the third auxiliary area on the third floor above ground.

[0024] A passive ventilation room and an office area are respectively set up on the fourth floor above ground, corresponding to the two groups of electrical instrument partitions. A main control room is set up on the third floor above ground, corresponding to the first auxiliary area, to arrange the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel.

[0025] An air-cooled refrigeration unit is arranged on the fifth floor above ground at a position corresponding to the passive ventilation room.

[0026] The present invention also provides an electrical plant building for a nuclear power plant, comprising:

[0027] The space of the electrical plant includes non-safety equipment area, safety equipment area and main control area from bottom to top.

[0028] The plane area of ​​the safety-level equipment area includes the same number of electrical and instrument partitions as the redundancy number of the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, which are the second floor above ground, the first floor above ground and the first floor underground from top to bottom.

[0029] The control equipment of each reactor protection and monitoring system is set on the second above-ground floor of the corresponding electrical and instrumentation partition, the power supply equipment for supplying power to the control equipment is set on the first above-ground floor of the corresponding electrical and instrumentation partition, the battery for obtaining electricity from the power supply equipment to provide backup power to the power supply equipment is set on the first underground floor of the corresponding electrical and instrumentation partition, and the main control equipment for monitoring the control equipment of each group of reactor protection and monitoring systems is set in the main control area.

[0030] Optionally, the multiple electrical and instrument partitions of the safety-level equipment area are arranged close to the reactor building and are divided into two groups, wherein the multiple electrical and instrument partitions of one group are arranged in parallel along a first horizontal direction, and the multiple electrical and instrument partitions of the other group are arranged in parallel along a second horizontal direction, and the first direction is perpendicular to the second direction.

[0031] Optionally, the planar area of ​​the safety-level equipment area further includes a first auxiliary area, which is located between two groups of electrical and instrument partitions and is arranged away from the reactor building.

[0032] The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment for supplying power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables for introducing external high voltage electricity into each power supply equipment, as well as cables connecting each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

[0033] Optionally, the planar area of ​​the safety-level equipment area further includes a second auxiliary area, which is located between the two groups of electrical and instrument partitions and close to the reactor building.

[0034] The first and second floors above ground of the second auxiliary area are equipped with electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant, and the first underground floor of the second auxiliary area is equipped with a pump stop circuit breaker.

[0035] Optionally, the planar area of ​​the safety-level equipment area further includes a third auxiliary area, and the third auxiliary area is arranged in parallel with a plurality of electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building.

[0036] The main steam pipeline gallery is arranged on the second above-ground floor of the third auxiliary area, the main feed water pipeline gallery is arranged on the first above-ground floor of the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, wherein the shutdown circuit breaker is arranged close to the reactor building.

[0037] Optionally, the non-safety equipment area is arranged on the second underground floor of the electrical plant.

[0038] The positions corresponding to the non-safety equipment area and the two groups of electrical instrumentation partitions are respectively arranged with two rows of non-safety power supply equipment of the nuclear power plant. The positions corresponding to the non-safety equipment area and the first auxiliary area are respectively arranged with two rows of fan equipment of the electrical plant and electrical instrumentation area of ​​the nuclear power plant.

[0039] The non-safety equipment area and the second auxiliary area are equipped with a voltage stabilizer heating cabinet.

[0040] The evaporator secondary sewage cleaning pump is arranged at the position corresponding to the non-safety-level equipment area and the third auxiliary area.

[0041] Optionally, the space of the main control area is divided into three layers, which are three layers above ground, four layers above ground and five layers underground from bottom to top.

[0042] Ventilation equipment is arranged at the positions corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is arranged at the position corresponding to the third auxiliary area on the third floor above ground.

[0043] The passive ventilation room and office area are located on the fourth floor, corresponding to the two groups of electrical instrument partitions. The main control room is located on the third floor, corresponding to the first auxiliary area, to house the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel.

[0044] Air-cooled refrigeration units are arranged on the fifth floor corresponding to the passive ventilation room.

[0045] The present invention divides the space of an electrical plant into a non-safety-level equipment area, a safety-level equipment area and a main control area from bottom to top, and divides the plane area of ​​the safety-level equipment area of ​​the electrical plant according to the redundant structure of the reactor protection and monitoring system, so that the electrical equipment and cables between different areas do not cross each other, the cable physical isolation effect is good, and the isolation integrity of the reactor protection system is guaranteed, thereby improving the reliability of the plant; and the spatial areas of the safety-level equipment area of ​​the electrical plant are layered according to the logical relationship of the main wiring of the electrical equipment, so that the layout of the electrical equipment meets the main wiring sequence of the cables and the cable laying path is the shortest; thereby, the plant layout is compact, the structure is simple, the functional zoning is concise, the cable channels are unobstructed, the distance is short, and the physical isolation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is the layout diagram of the second underground floor of the electrical plant of the present invention.

[0047] Figure 2 This is a layout diagram of the underground floor of the electrical plant of the present invention.

[0048] Figure 3 This is a layout diagram of the first floor of the electrical plant of the present invention.

[0049] Figure 4 This is a layout diagram of the second floor of the electrical plant of the present invention.

[0050] Figure 5 This is a layout diagram of the three above-ground floors of the electrical plant of the present invention.

[0051] Figure 6 This is a layout diagram of the four above-ground floors of the electrical plant of the present invention.

[0052] Figure 7 This is a layout diagram of the five-story electrical plant building of the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of the present invention.

[0054] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “upper” and the like are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0055] In the description of the present invention, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0056] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connect," "dispose," "install," "fix," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0057] The present invention provides a method for arranging an electrical plant building of a nuclear power plant, comprising:

[0058] The electrical plant space is divided from bottom to top into non-safety equipment area, safety equipment area and main control area.

[0059] The plane area of ​​the safety-level equipment area is divided into electrical and instrument partitions with the same number of redundancy as the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, namely, the second floor above ground, the first floor above ground and the first floor underground.

[0060] The control equipment of each reactor protection and monitoring system is allocated to the second above-ground floor of the corresponding electrical and instrumentation partition; the power supply equipment that supplies power to the control equipment is allocated to the first above-ground floor of the corresponding electrical and instrumentation partition; the battery that obtains electricity from the power supply equipment to provide backup power to the power supply equipment is allocated to the first underground floor of the corresponding electrical and instrumentation partition; the main control equipment that monitors each group of control equipment of the reactor protection and monitoring system is allocated to the main control area.

[0061] The present invention also provides an electrical plant building for a nuclear power plant, comprising:

[0062] The space of the electrical plant includes non-safety equipment area, safety equipment area and main control area from bottom to top.

[0063] The plane area of ​​the safety-level equipment area includes the same number of electrical and instrument partitions as the redundancy number of the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, which are the second floor above ground, the first floor above ground and the first floor underground from top to bottom.

[0064] The control equipment of each reactor protection and monitoring system is set on the second above-ground floor of the corresponding electrical and instrumentation partition, the power supply equipment for supplying power to the control equipment is set on the first above-ground floor of the corresponding electrical and instrumentation partition, the battery for obtaining electricity from the power supply equipment to provide backup power to the power supply equipment is set on the first underground floor of the corresponding electrical and instrumentation partition, and the main control equipment for monitoring the control equipment of each group of reactor protection and monitoring systems is set in the main control area.

[0065] Example 1:

[0066] This embodiment provides a method for arranging an electrical building in a nuclear power plant, including:

[0067] The electrical plant space is divided from bottom to top into non-safety equipment area, safety equipment area and main control area.

[0068] The plane area of ​​the safety-level equipment area is divided into electrical and instrument partitions with the same number of redundancy as the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, namely, the second floor above ground, the first floor above ground and the first floor underground.

[0069] The control equipment of each reactor protection and monitoring system is allocated to the second above-ground floor of the corresponding electrical and instrumentation partition; the power supply equipment that supplies power to the control equipment is allocated to the first above-ground floor of the corresponding electrical and instrumentation partition; the battery that obtains electricity from the power supply equipment to provide backup power to the power supply equipment is allocated to the first underground floor of the corresponding electrical and instrumentation partition; the main control equipment that monitors each group of control equipment of the reactor protection and monitoring system is allocated to the main control area.

[0070] Therefore, by dividing the space of the electrical plant from bottom to top into non-safety-level equipment area, safety-level equipment area and main control area, and dividing the plane area of ​​the electrical plant safety-level equipment area according to the redundant structure of the reactor protection and monitoring system, there is no intersection of electrical equipment and cables between different areas, and the physical isolation effect of the cables is good, which can ensure the complete isolation of the reactor protection system and improve the reliability of the plant; and according to the logical relationship of the main wiring of the electrical equipment, the spatial area of ​​the electrical plant safety-level equipment area is layered, so that the layout of the electrical equipment meets the main wiring sequence of the cables and the cable laying path is the shortest; thus, the plant layout is compact, the structure is simple, the functional zoning is concise, the cable channels are unobstructed, the distance is short, and the physical isolation effect is good.

[0071] In this embodiment, multiple electrical and instrument partitions in the safety-level equipment area are arranged close to the reactor building and divided into two groups. The multiple electrical and instrument partitions in one group are arranged side by side along a first horizontal direction, and the multiple electrical and instrument partitions in the other group are arranged side by side along a second horizontal direction. The first direction is perpendicular to the second direction.

[0072] Multiple sequences of electrical and instrumentation equipment are arranged around the reactor building, divided into two groups and arranged vertically between the two groups. Multiple sequences in each group are arranged in parallel, forming a "W"-shaped connection area between the electrical building and the reactor building, thereby maximizing the use of the building space. The building has a compact layout and simple structure, and can accommodate four or more redundant reactor protection and monitoring systems.

[0073] In this embodiment, the plane area of ​​the safety-level equipment area is further divided into a first auxiliary area, which is located between the two groups of electrical instrument partitions and away from the reactor building.

[0074] The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment that supplies power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables that introduce external high voltage electricity into each power supply equipment, as well as the cables that connect each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

[0075] In this embodiment, the plane area of ​​the safety-level equipment area is further divided into a second auxiliary area, which is located between the two groups of electrical instrument partitions and close to the reactor building.

[0076] The electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant are arranged on the first and second floors above ground in the second auxiliary area, and the pump stop circuit breaker is arranged on the first underground floor in the second auxiliary area.

[0077] In this embodiment, the plane area of ​​the safety-level equipment area is further divided into a third auxiliary area, which is arranged in parallel with multiple electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building.

[0078] The main steam pipeline gallery is arranged on the second floor above ground in the third auxiliary area, the main feed water pipeline gallery is set on the first floor above ground in the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, among which the shutdown circuit breaker is arranged close to the reactor building.

[0079] In this embodiment, the non-safety equipment area is arranged on the second underground floor of the electrical plant.

[0080] The two rows of non-safety-level power supply equipment of the nuclear power plant are respectively arranged in the positions corresponding to the non-safety-level equipment area and the two groups of electrical instrument partitions. The two rows of fan equipment of the electrical plant electrical instrument area of ​​the nuclear power plant are arranged in the positions corresponding to the non-safety-level equipment area and the first auxiliary area.

[0081] Place the voltage stabilizer heating cabinet in the corresponding position between the non-safety equipment area and the second auxiliary area.

[0082] The evaporator secondary sewage cleaning pump is arranged in the position corresponding to the non-safety-level equipment area and the third auxiliary area.

[0083] In this embodiment, the space of the main control area is divided into three layers, which are the third layer above ground, the fourth layer above ground and the fifth layer underground from bottom to top.

[0084] Ventilation equipment is arranged at the position corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is set at the position corresponding to the third auxiliary area on the third floor above ground.

[0085] A passive ventilation room and an office area are respectively set up on the fourth floor above ground, corresponding to the two groups of electrical instrument partitions. A main control room is set up on the third floor above ground, corresponding to the first auxiliary area, to arrange the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel.

[0086] An air-cooled refrigeration unit is arranged on the fifth floor above ground at a position corresponding to the passive ventilation room.

[0087] In summary, the electrical plant in this embodiment houses electrical and instrumentation systems and process systems. The electrical and instrumentation system includes nuclear island medium-voltage equipment, low-voltage equipment, DC and UPS equipment, battery banks, reactor protection and monitoring system cabinets, power plant process control cabinets, automatic fire alarm cabinets, data acquisition and processing cabinets, diversity control cabinets, the main control room, and supporting rooms. The process system includes the main steam and feedwater pipe corridors, evaporator secondary-side sewage pumps, and chillers. The plant has seven floors, including two underground and five above-ground.

[0088] Figure 1 This is the layout diagram of the second underground floor of the electrical plant of the present invention. The second underground floor is equipped with two redundant sequences of A / B non-safety-level battery rooms, two redundant sequences of non-safety-level DC and UPS power cabinet rooms, a voltage stabilizer heating panel cabinet room, a fan room for the electrical instrument area of ​​the electrical plant, and an evaporator secondary sewage cleaning pump. Among them, the battery room and the non-safety-level DC and UPS power cabinet room of the same sequence are arranged adjacent to each other and side by side, and are arranged vertically between the two redundant sequences. The fan room for the electrical instrument area of ​​the electrical plant is arranged in a large opening on the outside to facilitate the air ducts to the various rooms in the electrical plant. The voltage stabilizer heating panel cabinet room mainly controls the reactor voltage stabilizer. There are a large number of cables between it and the reactor plant, so it is arranged in the "W"-shaped connection area close to the reactor. The evaporator secondary sewage cleaning pump is arranged on the northwest side of the plant, separated from the electrical instrument function area.

[0089] Figure 2 This is the layout diagram of the underground floor of the electrical plant of the present invention. The underground floor is equipped with four safety sequences of battery rooms, cable rooms, pump stop circuit breakers, control rod control and monitoring cabinet rooms, and reactor stop circuit breaker rooms. Among them, the battery rooms of the four safety sequences are arranged around the reactor building, with two sequences arranged in parallel in one group and vertically between the two groups to achieve physical isolation; the cable room is arranged in the upper right corner of the outer side of the building, and is divided into two isolated rooms by a partition wall. The battery room and the cable room are arranged on the same floor so that the cables can bypass the battery room; the pump stop circuit breaker is arranged in the "W"-shaped connection area close to the reactor, close to the reactor building and adjacent to the cable room, which is convenient for the medium-voltage cable to pass from the conventional island to the cable room and enter the reactor building through the pump stop circuit breaker; the control rod control and monitoring panel cabinet room is adjacent to the shutdown circuit breaker room on the northwest side of the electrical building, and the shutdown circuit breaker is arranged close to the reactor building. The cable enters the control rod control and monitoring panel cabinet room from the control rod power cabinet, and then enters the reactor internal components in the reactor building through the shutdown circuit breaker.

[0090] Figure 3This is the layout diagram of the first floor of the electrical plant of the present invention. The first floor is equipped with four safety sequences of DC and UPS power cabinet rooms, two redundant sequences of medium and low voltage power cabinet rooms, main water supply corridors and electrical penetrations, etc. Among them, the four safety sequences of DC and UPS power cabinet rooms are arranged around the reactor building, with two sequences arranged in parallel in one group and vertically arranged between the two groups, corresponding to the upper and lower layers of the battery rooms of the same sequence, so that the DC power cabinet can supply power to the UPS uninterruptible power supply cabinet and the battery; the medium and low voltage power cabinet room is arranged in the upper right corner of the outer side of the plant, corresponding to the upper and lower layers of the cable rooms of the same sequence, and the cables can directly enter the line box below the medium and low voltage power cabinet from the lower cable room; the "W"-shaped connection area is arranged with electrical penetrations, and the cables enter the reactor building from the electrical plant; the main water supply corridor is arranged on the northwest side of the plant, and enters the conventional island through the corridor on the north side of the electrical plant.

[0091] Figure 4 This is the layout diagram of the second floor of the electrical plant of the present invention. The second floor is equipped with four safety sequences of reactor protection and monitoring system control cabinet rooms, two redundant sequences of safety-level related power plant process control cabinet rooms, main steam pipe corridors and electrical penetrations, etc. Among them, the four safety sequences of reactor protection and monitoring system control cabinet rooms are arranged around the reactor building, with two sequences arranged in parallel in one group and vertically between the two groups, corresponding to the upper and lower layers of the DC and UPS power cabinet rooms of the same sequence, so as to facilitate the UPS power cabinet to supply power to the control cabinet; the two redundant sequences of safety-level related power plant process control cabinet rooms are arranged in the upper right corner of the outer side of the plant, consistent with the redundant sequences of the medium and low voltage equipment rooms and cables below; the "W"-shaped connection area is arranged with electrical penetrations, and the cables enter the reactor building from the electrical plant; the main steam pipe corridor is arranged on the northwest side of the plant, and enters the conventional island through the pipe corridor on the north side of the electrical plant.

[0092] Figure 5 This is a layout diagram of the third floor of the electrical plant building of the present invention. The third floor houses the non-safety-grade power plant process control cabinet room, fire alarm cabinet room, data acquisition and processing cabinet room, diversity control cabinet room, cable ducts, electrical penetrations, the main control room ventilation room, and the main steam compartment. The cable duct is arranged in a cross shape, physically isolating the four redundant cables and converging them beneath the main control room panel. The non-safety-grade power plant process control cabinet room, fire alarm cabinet room, data acquisition and processing cabinet room, and diversity control cabinet room are arranged in four rooms separated by the cable duct. The electrical penetrations are arranged in a "W"-shaped connection area near the reactor. The main control room ventilation room and the main steam compartment are located directly north of the electrical plant building to avoid being under the main control room's shadow and reduce the impact of noise on operators.

[0093] Figure 6This is the layout diagram of the fourth floor of the electrical plant of the present invention. The fourth floor is equipped with a main control room and supporting rooms, a passive ventilation equipment room, a main steam compartment, etc. Among them, the main control room panel is arranged directly above the intersection of four serial cable channels to facilitate cable access; the isolation office, toilet, locker room, living area, technical support center shift office, and morning meeting room are arranged around the main control room. The shift office is adjacent to the main control room and separated by glass, which makes it easy for the shift to observe the situation inside the main control room. The isolation office is arranged opposite the elevator room to facilitate visitors to enter the main control room office area after completing the formalities; the passive ventilation equipment room and the main steam compartment are arranged on the north side of the electrical plant.

[0094] Figure 7 This is a layout diagram of the five-story electrical plant of the present invention, where ventilation rooms, air-cooled refrigeration units, etc. are set up on the five-story ground floor. The air-cooled refrigeration units are arranged on the north side of the electrical plant, corresponding to the upper and lower floors of the passive ventilation equipment room.

[0095] The electrical plant of the present invention is provided with a right-angle corridor, two staircases and a one-step elevator outside. The two staircases are vertically arranged at both ends of the right-angle corridor, and one of the staircases is protruding outside the outer wall of the plant.

[0096] The above-mentioned layout method of the electrical plant can effectively achieve the physical isolation of the four serial cable channels and equipment of the reactor protection and monitoring system, and match the overall layout requirements of the nuclear island. Through reasonable planning of the plant, the plant space is utilized to the greatest extent, and the plant design achieves an organic unity of safety and economy.

[0097] Specifically, four rows of electrical and instrumentation equipment are arranged around the reactor building, with two rows arranged in parallel groups and perpendicular to each other. This creates a "W"-shaped connection between the electrical and reactor buildings. Inside the building, arranged from bottom to top, are the battery and cable rooms, DC and UPS power cabinets, medium and low voltage power cabinets, reactor protection and monitoring system control cabinets, diversity protection system control cabinets, and the main control room. This arrangement offers advantages: effective physical isolation of the electrical and instrumentation equipment and adheres to the logical relationship between the main cable connections. The building also features a simple structure with essentially identical upper and lower levels, high structural stability, and clear functional zoning.

[0098] Example 2:

[0099] This embodiment provides an electrical plant building for a nuclear power plant, including:

[0100] The space of the electrical plant includes non-safety equipment area, safety equipment area and main control area from bottom to top.

[0101] The plane area of ​​the safety-level equipment area includes the same number of electrical and instrument partitions as the redundancy number of the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, which are the second floor above ground, the first floor above ground and the first floor underground from top to bottom.

[0102] The control equipment of each reactor protection and monitoring system is set on the second above-ground floor of the corresponding electrical and instrumentation partition, the power supply equipment for supplying power to the control equipment is set on the first above-ground floor of the corresponding electrical and instrumentation partition, the battery for obtaining electricity from the power supply equipment to provide backup power to the power supply equipment is set on the first underground floor of the corresponding electrical and instrumentation partition, and the main control equipment for monitoring the control equipment of each group of reactor protection and monitoring systems is set in the main control area.

[0103] In this embodiment, the multiple electrical and instrument partitions of the safety-level equipment area are arranged close to the reactor building and are divided into two groups. The multiple electrical and instrument partitions in one group are arranged in parallel along a first horizontal direction, and the multiple electrical and instrument partitions in the other group are arranged in parallel along a second horizontal direction. The first direction is perpendicular to the second direction.

[0104] In this embodiment, the planar area of ​​the safety-level equipment area also includes a first auxiliary area, which is located between two groups of electrical and instrument partitions and is far away from the reactor building.

[0105] The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment for supplying power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables for introducing external high voltage electricity into each power supply equipment, as well as cables connecting each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

[0106] In this embodiment, the planar area of ​​the safety-level equipment area also includes a second auxiliary area, which is located between the two groups of electrical and instrument partitions and close to the reactor building.

[0107] The first and second floors above ground of the second auxiliary area are equipped with electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant, and the first underground floor of the second auxiliary area is equipped with a pump stop circuit breaker.

[0108] In this embodiment, the planar area of ​​the safety-level equipment area further includes a third auxiliary area, which is arranged in parallel with multiple electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building.

[0109] The main steam pipeline gallery is arranged on the second above-ground floor of the third auxiliary area, the main feed water pipeline gallery is arranged on the first above-ground floor of the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, wherein the shutdown circuit breaker is arranged close to the reactor building.

[0110] In this embodiment, the non-safety equipment area is arranged on the second underground floor of the electrical plant.

[0111] The positions corresponding to the non-safety equipment area and the two groups of electrical instrumentation partitions are respectively arranged with two rows of non-safety power supply equipment of the nuclear power plant. The positions corresponding to the non-safety equipment area and the first auxiliary area are respectively arranged with two rows of fan equipment of the electrical plant and electrical instrumentation area of ​​the nuclear power plant.

[0112] The non-safety equipment area and the second auxiliary area are equipped with a voltage stabilizer heating cabinet.

[0113] The evaporator secondary sewage cleaning pump is arranged at the position corresponding to the non-safety-level equipment area and the third auxiliary area.

[0114] In this embodiment, the space of the main control area is divided into three layers, which are the third layer above ground, the fourth layer above ground and the fifth layer underground from bottom to top.

[0115] Ventilation equipment is arranged at the positions corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is arranged at the position corresponding to the third auxiliary area on the third floor above ground.

[0116] The passive ventilation room and office area are located on the fourth floor, corresponding to the two groups of electrical instrument partitions. The main control room is located on the third floor, corresponding to the first auxiliary area, to house the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel.

[0117] Air-cooled refrigeration units are arranged on the fifth floor corresponding to the passive ventilation room.

[0118] The electrical plant of the above-mentioned embodiment can accommodate four redundant reactor protection and monitoring systems. The plant has a compact layout, simple structure, concise functional divisions, unobstructed cable channels, short distances, and good physical isolation effects. It is a plant design structure that is both safe and economical.

[0119] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A method for arranging an electrical plant in a nuclear power plant, characterized in that: include: The electrical plant space is divided from bottom to top into non-safety equipment area, safety equipment area and main control area. The plane area of ​​the safety-level equipment area is divided into electrical and instrument partitions with the same number of redundancy as the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, namely, the second floor above ground, the first floor above ground and the first floor underground. Allocate the control equipment of each reactor protection and monitoring system to the second floor above ground in the corresponding electrical and instrumentation section; allocate the power supply equipment that supplies power to the control equipment to the first floor above ground in the corresponding electrical and instrumentation section; allocate the storage battery that draws power from the power supply equipment to provide backup power to the power supply equipment to the first floor below ground in the corresponding electrical and instrumentation section; and allocate the main control equipment that monitors each group of reactor protection and monitoring system control equipment to the main control area; The multiple electrical and instrument partitions of the safety-level equipment area are arranged close to the reactor building and divided into two groups. The multiple electrical and instrument partitions of one group are arranged side by side along a first horizontal direction, and the multiple electrical and instrument partitions of the other group are arranged side by side along a second horizontal direction, with the first direction being perpendicular to the second direction.

2. The method for arranging an electrical building of a nuclear power plant according to claim 1, characterized in that: The plane area of ​​the safety-level equipment area is further divided into a first auxiliary area, which is located between two groups of electrical and instrument partitions and away from the reactor building. The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment that supplies power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables that introduce external high voltage electricity into each power supply equipment, as well as the cables that connect each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

3. The method for arranging an electrical building of a nuclear power plant according to claim 2, characterized in that: The plane area of ​​the safety-level equipment area is further divided into a second auxiliary area, which is located between the two groups of electrical and instrument partitions and close to the reactor building. The electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant are arranged on the first and second floors above ground in the second auxiliary area, and the pump stop circuit breaker is arranged on the first underground floor in the second auxiliary area.

4. The method for arranging an electrical building of a nuclear power plant according to claim 3, characterized in that: The plane area of ​​the safety-level equipment area is further divided into a third auxiliary area, which is arranged in parallel with multiple electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building. The main steam pipeline gallery is arranged on the second floor above ground in the third auxiliary area, the main feed water pipeline gallery is set on the first floor above ground in the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, among which the shutdown circuit breaker is arranged close to the reactor building.

5. The method for arranging an electrical building of a nuclear power plant according to any one of claims 1 to 4, characterized in that: The non-safety equipment area is arranged on the second underground floor of the electrical plant. The two rows of non-safety-level power supply equipment of the nuclear power plant are respectively arranged in the positions corresponding to the non-safety-level equipment area and the two groups of electrical instrument partitions. The two rows of fan equipment of the electrical plant electrical instrument area of ​​the nuclear power plant are arranged in the positions corresponding to the non-safety-level equipment area and the first auxiliary area. Place the voltage stabilizer heating cabinet in the corresponding position between the non-safety equipment area and the second auxiliary area. The evaporator secondary sewage cleaning pump is arranged in the position corresponding to the non-safety-level equipment area and the third auxiliary area.

6. The method for arranging an electrical building of a nuclear power plant according to any one of claims 1 to 4, characterized in that: The main control area is divided into three layers, from bottom to top: the third, fourth and fifth floors above ground. Ventilation equipment is arranged at the position corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is set at the position corresponding to the third auxiliary area on the third floor above ground. A passive ventilation room and an office area are respectively set up on the fourth floor above ground, corresponding to the two groups of electrical instrument partitions. A main control room is set up on the third floor above ground, corresponding to the first auxiliary area, to arrange the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel. An air-cooled refrigeration unit is arranged on the fifth floor above ground at a position corresponding to the passive ventilation room.

7. An electrical plant building of a nuclear power plant, characterized in that: include: The space of the electrical plant includes non-safety equipment area, safety equipment area and main control area from bottom to top. The plane area of ​​the safety-level equipment area includes the same number of electrical and instrument partitions as the redundancy number of the reactor protection and monitoring system, and the space of the safety-level equipment area is divided into three layers, which are the second floor above ground, the first floor above ground and the first floor underground from top to bottom. The control equipment of each reactor protection and monitoring system is arranged on the second floor above ground of the corresponding electrical and instrumentation section; the power supply equipment for supplying power to the control equipment is arranged on the first floor above ground of the corresponding electrical and instrumentation section; the storage battery for obtaining power from the power supply equipment to provide backup power to the power supply equipment is arranged on the first floor below ground of the corresponding electrical and instrumentation section; and the main control equipment for monitoring the control equipment of each group of reactor protection and monitoring systems is arranged in the main control area; The four electrical and instrument partitions of the safety-level equipment area are all arranged close to the reactor building and are divided into multiple groups. The multiple electrical and instrument partitions in one group are arranged in parallel along a first horizontal direction, and the multiple electrical and instrument partitions in another group are arranged in parallel along a second horizontal direction. The first direction is perpendicular to the second direction.

8. The electrical plant building of a nuclear power plant according to claim 7, characterized in that: The plane area of ​​the safety-level equipment area also includes a first auxiliary area, which is located between two groups of electrical and instrument partitions and is far away from the reactor building. The power plant process control cabinets are arranged on the second floor above ground in the first auxiliary area, the medium and low voltage power supply equipment for supplying power to the power supply equipment is arranged on the first floor above ground in the first auxiliary area, and the cables for introducing external high voltage electricity into each power supply equipment, as well as cables connecting each power supply equipment and electrical equipment in other plant buildings of the nuclear power plant are arranged on the first underground floor of the first auxiliary area.

9. The electrical plant building of a nuclear power plant according to claim 8, characterized in that: The plane area of ​​the safety-level equipment area also includes a second auxiliary area, which is located between the two groups of electrical and instrument partitions and close to the reactor building. The first and second floors above ground of the second auxiliary area are equipped with electrical penetrations connecting the electrical plant and the electrical instrumentation equipment in the reactor plant, and the first underground floor of the second auxiliary area is equipped with a pump stop circuit breaker.

10. The electrical plant building of a nuclear power plant according to claim 9, characterized in that: The plane area of ​​the safety-level equipment area also includes a third auxiliary area, which is arranged in parallel with multiple electrical instrument partitions of one group of electrical instrument partitions and is arranged close to the reactor building. The main steam pipeline gallery is arranged on the second above-ground floor of the third auxiliary area, the main feed water pipeline gallery is arranged on the first above-ground floor of the third auxiliary area, and the control rod control and monitoring panel equipment and the shutdown circuit breaker are arranged on the first underground floor of the third auxiliary area, wherein the shutdown circuit breaker is arranged close to the reactor building.

11. The electrical building of a nuclear power plant according to any one of claims 7 to 10, characterized in that: The non-safety equipment area is located on the second underground floor of the electrical plant. The positions corresponding to the non-safety equipment area and the two groups of electrical instrumentation partitions are respectively arranged with two rows of non-safety power supply equipment of the nuclear power plant. The positions corresponding to the non-safety equipment area and the first auxiliary area are respectively arranged with two rows of fan equipment of the electrical plant and electrical instrumentation area of ​​the nuclear power plant. The non-safety equipment area and the second auxiliary area are equipped with a voltage stabilizer heating cabinet. The evaporator secondary sewage cleaning pump is arranged at the position corresponding to the non-safety-level equipment area and the third auxiliary area.

12. The electrical plant building of a nuclear power plant according to any one of claims 7 to 10, characterized in that: The main control area is divided into three floors, from bottom to top, the third floor above ground, the fourth floor above ground and the fifth floor above ground. Ventilation equipment is arranged at the positions corresponding to the two groups of electrical instrument partitions on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are arranged at the position corresponding to the first auxiliary area on the third floor above ground. The power plant process control cabinet, fire automatic alarm cabinet, data acquisition and processing cabinet and diversity control cabinet are isolated from each other by a cross-shaped cable channel. The electrical penetration is arranged at the position corresponding to the second auxiliary area on the third floor above ground. The main steam compartment is arranged at the position corresponding to the third auxiliary area on the third floor above ground. The passive ventilation room and office area are located on the fourth floor, corresponding to the two groups of electrical instrument partitions. The main control room is located on the third floor, corresponding to the first auxiliary area, to house the main control equipment. The cables connecting the control equipment of multiple reactor protection and monitoring systems to the main control equipment enter the main control room through a cross-shaped cable channel. Air-cooled refrigeration units are arranged on the fifth floor corresponding to the passive ventilation room.

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