Nuclear power plant communication network

Abstract

The communication network comprises a first main optical cable, at least one first optical network unit, a second main optical cable, at least one second optical network unit, a first network, a second network and a network communication module, the first main optical cable, the first optical network unit, the second main optical cable and the second optical network unit are arranged in each building of the nuclear power plant, the first optical network unit is connected with a far-end first server through a first network, and the second optical network unit is connected with a far-end second server through a second network. The first network and the second network are mutually independent and mutually active and standby; the network communication module performs communication between a first network and a second network. The nuclear power plant communication network is integrated into the first network and the second network which are mutually independent and mutually active and standby, the communication system composition is optimized under the condition that the safety degree and the redundancy are guaranteed, the total manufacturing cost and the system performance are remarkably reduced, and the requirements of various services of the nuclear power plant can be better met.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power plant communication networks, and more specifically, to a nuclear power plant communication network. Background Art

[0002] The communication network of a nuclear power plant is one of the standard configuration systems of a nuclear power plant. Its function is to provide communication means for staff during daily office work, production command and emergency response. At present, the communication network of a nuclear power plant includes 14 subsystems, including administrative telephone system, safety telephone system, sound alarm system, clock system, power dispatch telephone system, computer network, sound power telephone system, integrated business transmission system, internal intercom telephone system, communication equipment monitoring system, switch station communication system, wired broadcasting system, wireless communication system and integrated wiring system.

[0003] The current nuclear power plant communication network consists of multiple subsystems with highly overlapping functions. Since the functions of each system are relatively simple and the system reliability is low, the communication system adopts a high-security configuration of independent wiring, system redundancy, and equipment redundancy to ensure communication reliability. For example, the administrative telephone, internal intercom and wireless communication system constitute redundant backup between voice systems, the wired broadcast system and the sound alarm system constitute redundant backup, and in addition, the host and other key equipment of each system adopt hot backup.

[0004] Since the administrative telephone system, security telephone system, sound alarm system, clock system, computer network, integrated business transmission system, internal intercom telephone system, and wired broadcasting system of the nuclear power plant all use independent wiring networks, the single system network technology is backward, the reliability is poor, there is a single point of failure problem, and the overall cost is high, which brings certain difficulties to the engineering implementation and production operation and maintenance of the communication system, and cannot fully meet the new requirements of the communication system for the new operating scenarios of the nuclear power plant. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a nuclear power plant communication network in view of the problems existing in the prior art.

[0006] The technical solution adopted by the present invention to solve the technical problem is: construct a nuclear power plant communication network, including: a first trunk optical cable, at least one first optical network unit, a second trunk optical cable, at least one second optical network unit, a first network, a second network and a network communication module; and the first network includes the at least one first optical network unit, and the second network includes the at least one second optical network unit; The first trunk optical cable, the at least one first optical network unit, the second trunk optical cable and the at least one second optical network unit are respectively arranged in respective buildings of the nuclear power plant, and the at least one first optical network unit is connected to the first trunk optical cable, the at least one second optical network unit is connected to the second trunk optical cable, the at least one first optical network unit is connected to a remote first server through the first network, the at least one second optical network unit is connected to a remote second server through the second network, and the first network and the second network are independent of each other and serve as a primary and a backup for each other; The network communication module is used to perform communication between the first network and the second network; The first network is used to perform the first main and backup communication network functions of the nuclear power plant; The second network is used to perform the second primary and backup communication network functions of the nuclear power plant.

[0007] In the nuclear power plant communication network of the present invention, the first network comprises: at least one first optical line terminal and a first network communication unit arranged corresponding to the at least one first optical network unit; Each of the first optical network units is connected to a corresponding first optical line terminal; The at least one first optical line terminal is connected to the first network communication unit, and is used to perform communication between the at least one first optical network unit and the first network communication unit.

[0008] In the nuclear power plant communication network described in the present invention, the first network communication unit includes: a first SPN module or a first STN module; the second network communication unit includes: a second SPN module or a second STN module.

[0009] In the nuclear power plant communication network of the present invention, the first network further includes: a primary broadcast system host, a primary telephone system host, a primary office service server, a backup sound alarm system host, a backup clock system host and a backup wireless communication system host; The primary broadcast system host, the primary telephone system host, the primary office service server, the backup sound alarm system host, the backup clock system host and the backup wireless communication system host are respectively connected to the first network communication unit.

[0010] In the nuclear power plant communication network of the present invention, the second network comprises: at least one second optical line terminal and a second network communication unit arranged corresponding to the at least one second optical network unit; Each of the second optical network units is connected to a corresponding second optical line terminal; The at least one second optical line terminal is connected to the second network communication unit and is used to perform communication between the at least one second optical network unit and the second network communication unit.

[0011] In the nuclear power plant communication network of the present invention, the second network includes: a main sound alarm system host, a main clock system host, a main wireless communication system host, a backup broadcast system host and a backup telephone system host; The main sound alarm system host, the main clock system host, the main wireless communication system host, the backup broadcast system host and the backup telephone system host are respectively connected to the second network communication unit.

[0012] In the nuclear power plant communication network described in the present invention, the network communication module is a hardware firewall.

[0013] In the nuclear power plant communication network of the present invention, the first optical network unit is physically connected to the first network and the second network, and the first optical network unit communicates with any one of the first network and the second network at the same time; The second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time.

[0014] In the nuclear power plant communication network described in the present invention, the first trunk optical cable and the second trunk optical cable are laid in different cable trenches; or, the first trunk optical cable and the second trunk optical cable are laid in the same cable trench, and at least one of the first trunk optical cable and the second trunk optical cable is a fire-resistant optical cable.

[0015] In the nuclear power plant communication network described in the present invention, in the first network and the second network, different hard isolation slices transmitted on F5G are connected to different network ports of the slice packet network or the intelligent transmission network through different network ports of the optical line terminal, and are converted into different hard slices in the slice packet network or the intelligent transmission network for data transmission; each communication subsystem host in the first network and the second network uses the hard slice corresponding to the communication subsystem in the slice packet network or the intelligent transmission network.

[0016] The nuclear power plant communication network implementing the present invention has the following beneficial effects: comprising a first trunk optical cable, at least one first optical network unit, a second trunk optical cable, at least one second optical network unit, a first network, a second network and a network communication module; the first trunk optical cable, the first optical network unit, the second trunk optical cable and the second optical network unit are arranged in various buildings of the nuclear power plant, the first optical network unit is connected to the remote first server through the first network, the second optical network unit is connected to the remote second server through the second network, the first network and the second network are independent of each other and serve as a primary and a backup for each other; the network communication module executes the communication between the first network and the second network. The present invention integrates the nuclear power plant communication network into a first network and a second network that are independent of each other and serve as a primary and a backup for each other, optimizes the composition of the communication system while ensuring safety and redundancy, significantly reduces the overall cost and system performance, and can better meet the needs of various services of the nuclear power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 It is a network architecture diagram of the nuclear power plant communication network provided by the present invention. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] refer to Figure 1 , Figure 1 A network architecture diagram of a preferred embodiment of a nuclear power plant communication network provided by the present invention.

[0020] Specifically, Figure 1 As shown, the nuclear power plant communication network includes: a first trunk optical cable, at least one first optical network unit, a second trunk optical cable, at least one second optical network unit, a first network, a second network and a network communication module. The first network includes at least one first optical network unit, and the second network includes the at least one second optical network unit.

[0021] Among them, the first trunk optical cable, at least one first optical network unit, the second trunk optical cable and at least one second optical network unit are respectively arranged in various buildings of the nuclear power plant, and at least one first optical network unit is connected to the first trunk optical cable, at least one second optical network unit is connected to the second trunk optical cable, at least one first optical network unit is connected to the remote first server through the first network, at least one second optical network unit is connected to the remote second server through the second network, the first network and the second network are independent of each other and are primary and standby to each other; the network communication module is used to perform communication between the first network and the second network; the first network is used to perform the first primary and standby communication network functions of the nuclear power plant; the second network is used to perform the second primary and standby communication network functions of the nuclear power plant.

[0022] The present invention reconstructs the transmission network of the nuclear power plant communication network, integrates the integrated wiring system, computer network system and integrated business transmission system into the first network of the nuclear power plant communication network and the second network composed of the wireless communication system through architecture optimization, and jointly forms two sets of backbone transmission networks that are independent of each other in structure and mutually independent in function, becoming the digital business infrastructure of the nuclear power plant. The present invention makes full use of new communication technologies, redesigns the overall architecture of the plant-wide communication system, optimizes the system composition, reduces the overall cost, and improves the system performance while ensuring that the original safety and redundancy are not reduced, so as to better meet the new needs of various businesses of the nuclear power plant.

[0023] Optionally, in an embodiment of the present invention, the first network includes: at least one first optical line terminal and a first network communication unit corresponding to at least one first optical network unit. Each first optical network unit is connected to a correspondingly arranged first optical line terminal; at least one first optical line terminal is connected to the first network communication unit, and is used to perform communication between at least one first optical network unit and the first network communication unit. Specifically, in an embodiment of the present invention, the first optical line terminal (OLT1) and the first optical network unit (ONU1) constitute an F5G network, and the F5G network (fifth generation fixed network) supports hard isolation slicing technology based on the ONU Ethernet port, which can realize hard isolation of different slices in terms of VLAN, MAC, bandwidth and queue resources.

[0024] Optionally, in an embodiment of the present invention, the first network communication unit includes: a first SPN module or a first STN module.

[0025] Optionally, in an embodiment of the present invention, the first network also includes multiple communication subsystem hosts, specifically: a main broadcast system host, a main telephone system host, a main office service server, a backup sound alarm system host, a backup clock system host, and a backup wireless communication system host; the main broadcast system host, the main telephone system host, the main office service server, the backup sound alarm system host, the backup clock system host, and the backup wireless communication system host are respectively connected to the first network communication unit. Specifically, the present invention adopts a network technology combining F5G and SPN (or STN) to integrate the integrated wiring system, the computer network system, and the integrated service transmission system into the first network of the nuclear power plant communication network.

[0026] Optionally, in an embodiment of the present invention, the second network includes: at least one second optical line terminal and a second network communication unit corresponding to at least one second optical network unit. Each second optical network unit is connected to a corresponding second optical line terminal; at least one second optical line terminal is connected to the second network communication unit, and is used to perform communication between at least one second optical network unit and the second network communication unit. Specifically, in an embodiment of the present invention, the second optical line terminal (OLT2) and the second optical network unit (ONU2) constitute an F5G network. The F5G network (fifth generation fixed network) supports hard isolation slicing technology based on the ONU Ethernet port, which can realize hard isolation of different slices in terms of VLAN, MAC, bandwidth and queue resources.

[0027] Optionally, in an embodiment of the present invention, the second network communication unit includes: a second SPN module or a second STN module.

[0028] Optionally, the first SPN module and the second SPN module are both slice packet networks, and the first STN module and the second STN module are both intelligent transmission networks.

[0029] Optionally, in an embodiment of the present invention, the second network includes a plurality of communication subsystem hosts, specifically: a main sound alarm system host, a main clock system host, a main wireless communication system host, a backup broadcast system host, and a backup telephone system host. The main sound alarm system host, the main clock system host, the main wireless communication system host, the backup broadcast system host, and the backup telephone system host are respectively connected to the second network communication unit.

[0030] Specifically, the present invention uses a network technology combining F5G and SPN (or STN) to optimize the wireless communication system into the second network of the nuclear power plant communication network. The F5G network supports hard-isolated private network slicing technology based on the ONU Ethernet port, which can achieve hard isolation of different private network slices in terms of VLAN, MAC, bandwidth and queue resources.

[0031] Optionally, the network communication module is a hardware firewall. Specifically, in the embodiment of the present invention, the first network and the second network are connected via a hardware firewall to achieve interconnection, redundancy backup, etc. between the two networks.

[0032] Specifically, in the embodiment of the present invention, by adopting the network technology combining F5G and SPN (or STN), the integrated wiring system, computer network system and integrated service transmission system are optimized and integrated into the first network of the nuclear power plant communication network. Among them, the F5G network (OLT (optical line terminal) + ONU (optical network unit)) supports the hard isolation slicing technology based on the ONU Ethernet port (that is, different Ethernet ports of ONU can be divided into different hard isolation slices), and each different slice has its own independent VLAN (virtual local area network) resources, MAC (media access control) address table resources, ARP (address resolution protocol) resources, routing table resources, bandwidth and queue resources to achieve secure isolation of slices. Obviously, the traditional network architecture cannot achieve these functions.

[0033] Similarly, the present invention adopts network technology that combines F5G and SPN (or STN) to optimize the wireless communication system into network B of the nuclear power plant communication network through architecture, wherein the F5G network supports hard isolation slicing technology based on the ONU Ethernet port, and each different slice has its own independent VLAN resources, MAC address table resources, ARP resources, routing table resources, bandwidth and queue resources to achieve secure isolation of slices.

[0034] It should be noted that network slicing refers to dividing the entire network according to different application scenarios and service requirements to form multiple independent and customizable virtual network "slices". Each network slice can be customized according to specific needs to achieve different service quality and resource allocation.

[0035] Hard isolation slicing technology refers to the use of physical means or strict logical isolation mechanisms in network slicing to ensure that resources (such as bandwidth, time slots, ports, etc.) between different slices do not interfere with each other, achieving exclusive use of resources and strict isolation. Hard isolation slicing technology is designed to meet the extremely high requirements of specific services or user groups for network performance, security and reliability, and ensure the stable operation of key services in the network.

[0036] Soft slicing technology refers to dynamically allocating network resources to different services or users on the same physical network through QoS (Quality of Service) technology to meet their specific service quality requirements. Compared with hard isolation slicing technology, soft slicing does not have bandwidth guarantee capabilities, so it is not suitable for business scenarios that require strict isolation and high reliability.

[0037] Furthermore, in an embodiment of the present invention, in the first network and the second network, different hard-isolated slices transmitted on F5G are connected to different network ports of a sliced ​​packet network or an intelligent transport network through different network ports of an optical line terminal, and data is transmitted after being converted into different hard slices in the sliced ​​packet network or the intelligent transport network; each communication subsystem host in the first network and the second network uses the hard slice corresponding to the communication subsystem in the sliced ​​packet network or the intelligent transport network. That is, different hard-isolated slices transmitted on F5G are connected to different network ports of SPN (or STN) through different uplink network ports of OLT, and data is transmitted after being converted into different hard slices in SPN (or STN), and each communication subsystem host uses the hard slice corresponding to the communication subsystem in SPN (or STN). For example, Figure 1 As shown, the primary broadcast system host uses the hard slice corresponding to the primary broadcast system host in SPN (or STN). Among them, the hard slices of each communication subsystem of the first network and the second network are shown in Table 1: Table 1 By using the nuclear power plant communication network of the present invention, only one trunk optical cable (i.e., the first trunk optical cable and the second trunk optical cable) of the first network and the second network and one or more corresponding ONU devices (i.e., at least one or more corresponding ONU1 and one or more corresponding ONU2, wherein ONU1 is arranged corresponding to the first trunk optical cable, and ONU2 is arranged corresponding to the second trunk optical cable) need to be installed in each building of the nuclear power plant to meet the business needs of each communication system in the building. In other words, the nuclear power plant communication network of the present invention only needs to install the first trunk optical cable and one or more ONU1 devices, the second trunk optical cable and one or more ONU2 devices in each building in the nuclear power plant, and at the same time, a first network and a second network are installed in the communication service system of the nuclear power plant, the first network communicates with the first trunk optical cable, and the second network communicates with the second trunk optical cable, thus meeting the requirements of the nuclear power plant communication network. Figure 1As shown, #1ONU1, #2ONU1, ..., #n ONU1 communicate with #1OLT1, #2 OLT 1, ..., #n OLT 1 ​​respectively through the first trunk optical cable, wherein #1ONU1, #2ONU1, ..., #n ONU1 are different optical network units, and #1OLT1, #2 OLT 1, ..., #n OLT 1 ​​are different optical line terminals. Similarly, #1ONU2, #2ONU2, ..., #n ONU2 communicate with #1OLT2, #2 OLT 2, ..., #n OLT 2 respectively through the second trunk optical cable, wherein #1ONU2, #2ONU2, ..., #n ONU2 are different optical network units, and #1OLT2, #2 OLT 2, ..., #n OLT 2 are different optical line terminals. Among them, the first trunk optical cable, the second trunk optical cable, the first optical network unit and the second optical network unit are all installed in the building, and the first optical line terminal, the second optical line terminal, the first SPN module / first STN module, the second SPN module / second STN module are all installed in the communication room. Similarly, the main broadcast system host, the main telephone system host, the main office service server, the backup sound alarm system host, the backup clock system host, the backup wireless communication system host, the main sound alarm system host, the main clock system host, the main wireless communication system host, the backup broadcast system host and the backup telephone system host are also installed in the communication room.

[0038] Compared with the traditional communication subsystem, each of which needs to install a set of corresponding hardware equipment in each building (such as separate broadcast, sound alarm, clock terminal box, telephone and other trunk optical cables and terminal boxes), the present invention can not only simplify the hardware architecture and installation wiring (the transmission system is quite large and the installation wiring is quite complicated, the construction period is long, the redundancy is poor, the scalability is poor, and the operation and maintenance workload is quite complicated and difficult), but also can significantly shorten the construction period, have good redundancy, high scalability, and significantly reduce the operation and maintenance workload. At the same time, while improving the system performance, it can also effectively reduce the overall cost of the communication system. For example, through the present invention, when a new communication subsystem needs to be added, it only needs to define the corresponding slice on the port of the ONU (ONU1 or ONU2) device in the building, and at the same time, add the corresponding system host on the system host side, and add the corresponding communication port on the remote server side to complete the addition of the new system. No rewiring is required, and no additional hardware equipment is required. However, if a new communication subsystem needs to be added to the traditional communication network, it is a very large project, for example, rewiring the optical cable, which must be a very large project, but the present invention is completely unaffected.

[0039] In an embodiment of the present invention, the hard isolation slices of the broadcasting system and the acoustic alarm system are set in different networks. For example, the hard isolation slice (main) of the broadcasting system is set in the first network, and the hard isolation slice (main) of the acoustic alarm system is set in the second network. Since the broadcasting system and the acoustic alarm system are two backup systems of the nuclear power plant. Therefore, in the present invention, in order to avoid the two systems being unavailable at the same time due to a network failure in the same network, the broadcasting system and the acoustic alarm system are set in two different networks, so as to ensure that at least one system can be used when a network failure occurs. At the same time, in order to ensure the redundancy and reliability of the system, the hard isolation slice (backup) of the broadcasting system is set in the second network, and the hard isolation slice (backup) of the acoustic alarm system is set in the first network.

[0040] In the embodiment of the present invention, the telephone system hard isolation slice (main) is set in the first network, and the wireless communication system hard isolation slice (main) is set in the second network. Since the telephone system and the wireless communication system are two backup systems of the nuclear power plant. Therefore, in the present invention, in order to avoid the two systems being unavailable at the same time due to a network failure in the same network, the broadcasting system and the sound alarm system are set in two different networks, so as to ensure that at least one system can be used when a network failure occurs. At the same time, in order to ensure the redundancy and reliability of the system, the telephone system hard isolation slice is set (backup) in the second network, and the wireless communication hard isolation slice (backup) is set in the first network.

[0041] Furthermore, in an embodiment of the present invention, the first optical network unit is physically connected to the first network and the second network, and the first optical network unit communicates with any one of the first network and the second network at the same time. The second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time. Specifically, in an embodiment of the present invention, a single ONU device is only connected to a single network (the first network or the second network). To further improve the reliability of the communication system, a single ONU device can be connected to two networks. When a network fails, the ONU device can be connected to another network, and only one network is connected at the same time. A single ONU device cannot be connected to two networks at the same time. In other words, a single ONU device needs to be physically connected to two networks at the same time, and a single ONU device can only communicate with one of the networks at the same time.

[0042] For example, Figure 1 As shown, any ONU1 in the first network is physically connected to the first network and the second network respectively, but at the same time, the ONU1 can only communicate with the first network. When the first network fails, the ONU1 automatically switches to communicate with the second network, thereby ensuring the continuity and stability of data communication.

[0043] like Figure 1 As shown, in order to further improve system reliability, in an embodiment of the present invention, one of the two primary and secondary hosts of a single communication subsystem can be set in the first network and the other in the second network.

[0044] Furthermore, in the embodiment of the present invention, in order to improve the system reliability, the first trunk optical cable and the second trunk optical cable are laid in different cable trenches; or, the first trunk optical cable and the second trunk optical cable are laid in the same cable trench, and at least one of the first trunk optical cable and the second trunk optical cable is a fire-resistant optical cable. That is, the first trunk optical cable and the second trunk optical cable connected to each building need to be laid along different cable trenches; if the actual project requires that the first trunk optical cable and the second trunk optical cable be laid in the same cable trench, at least one of the first trunk optical cable and the second trunk optical cable needs to be a fire-resistant optical cable, so as to avoid the two optical cables in the same cable trench being burned at the same time in abnormal situations such as fire, thereby avoiding network interruption.

[0045] In addition, in the embodiment of the present invention, in the first network, the first optical line terminal and the first SPN module / first STN module also communicate through an optical cable (defined as optical cable A to distinguish them from the optical cables in the second network); similarly, in the second network, the second optical line terminal and the second SPN module / second STN module also communicate through an optical cable (defined as optical cable B to distinguish them from the optical cables in the first network). Among them, the installation requirements of optical cable A and optical cable B need to meet the following conditions: optical cable A and optical cable B are laid in different cable trenches; or, optical cable A and optical cable B are laid in the same cable trench, and at least one of optical cable A and optical cable B is a fire-resistant optical cable. That is, the optical cables A and optical cable B connected to each building need to be laid along different cable trenches; if the actual project requires that optical cable A and optical cable B be laid in the same cable trench, at least one of optical cable A and optical cable B needs to be a fire-resistant optical cable, so as to avoid the two optical cables in the same cable trench being burned at the same time in abnormal situations such as fire, thereby avoiding network interruption.

[0046] This invention adopts new network technologies such as SPN (Sliced ​​Packet Network) / STN (Smart Transport Network), F5G (5th Generation Fixed Network) to build a comprehensive service transmission network for nuclear power plants. The new transmission network has hard-isolated network slicing technology, which can fully meet the personalized needs of various intelligent services in terms of latency, bandwidth, and security isolation.

[0047] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0048] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0049] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0050] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A nuclear power plant communication network, characterized in that: include: A first trunk optical cable, at least one first optical network unit, a second trunk optical cable, at least one second optical network unit, a first network, a second network, and a network communication module; wherein the first network includes the at least one first optical network unit, and the second network includes the at least one second optical network unit; The first trunk optical cable, the at least one first optical network unit, the second trunk optical cable and the at least one second optical network unit are respectively arranged in respective buildings of the nuclear power plant, and the at least one first optical network unit is connected to the first trunk optical cable, the at least one second optical network unit is connected to the second trunk optical cable, the at least one first optical network unit is connected to a remote first server through the first network, the at least one second optical network unit is connected to a remote second server through the second network, and the first network and the second network are independent of each other and serve as a primary and a backup for each other; The network communication module is used to perform communication between the first network and the second network; The first network is used to perform the first main and backup communication network functions of the nuclear power plant; The second network is used to perform the second primary and backup communication network functions of the nuclear power plant.

2. The nuclear power plant communication network according to claim 1, characterized in that: The first network includes: at least one first optical line terminal and a first network communication unit arranged corresponding to the at least one first optical network unit; Each of the first optical network units is connected to a corresponding first optical line terminal; The at least one first optical line terminal is connected to the first network communication unit, and is used to perform communication between the at least one first optical network unit and the first network communication unit.

3. The nuclear power plant communication network according to claim 2, characterized in that: The first network communication unit includes: a first SPN module or a first STN module; the second network communication unit includes: a second SPN module or a second STN module.

4. The nuclear power plant communication network according to claim 3, characterized in that: The first network also includes: a primary broadcast system host, a primary telephone system host, a primary office service server, a backup sound alarm system host, a backup clock system host, and a backup wireless communication system host; The primary broadcast system host, the primary telephone system host, the primary office service server, the backup sound alarm system host, the backup clock system host and the backup wireless communication system host are respectively connected to the first network communication unit.

5. The nuclear power plant communication network according to claim 3, characterized in that: The second network includes: at least one second optical line terminal and a second network communication unit arranged corresponding to the at least one second optical network unit; Each of the second optical network units is connected to a corresponding second optical line terminal; The at least one second optical line terminal is connected to the second network communication unit and is used to perform communication between the at least one second optical network unit and the second network communication unit.

6. The nuclear power plant communication network according to claim 5, characterized in that: The second network includes: a main sound alarm system host, a main clock system host, a main wireless communication system host, a backup broadcast system host and a backup telephone system host; The main sound alarm system host, the main clock system host, the main wireless communication system host, the backup broadcast system host and the backup telephone system host are respectively connected to the second network communication unit.

7. The nuclear power plant communication network according to any one of claims 1 to 6, characterized in that: The network communication module is a hardware firewall.

8. The nuclear power plant communication network according to claim 1, characterized in that: The first optical network unit is physically connected to the first network and the second network, and the first optical network unit communicates with any one of the first network and the second network at the same time; The second optical network unit is physically connected to the first network and the second network, and the second optical network unit communicates with any one of the first network and the second network at the same time.

9. The nuclear power plant communication network according to claim 1, characterized in that: The first trunk optical cable and the second trunk optical cable are laid in different cable trenches; or, the first trunk optical cable and the second trunk optical cable are laid in the same cable trench, and at least one of the first trunk optical cable and the second trunk optical cable is a fire-resistant optical cable.

10. The nuclear power plant communication network according to claim 1, characterized in that: In the first network and the second network, different hard-isolated slices transmitted on F5G are connected to different network ports of the slice packet network or the intelligent transport network through different network ports of the optical line terminal, and are converted into different hard slices in the slice packet network or the intelligent transport network for data transmission; each communication subsystem host in the first network and the second network uses the hard slice corresponding to the communication subsystem in the slice packet network or the intelligent transport network.

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