Distributed primary loop pressure boundary leakage monitoring system and method

Abstract

The invention relates to a distributed primary loop pressure boundary leakage monitoring system and method.The distributed primary loop pressure boundary leakage monitoring system comprises a plurality of floor drains, a plurality of waste liquid discharging pipelines and a waste liquid collecting facility, each floor drain is installed in a process pipeline room, and the head end of each waste liquid discharging pipeline is connected with the corresponding floor drain; the tail end of each floor drain pipeline is connected with a waste liquid collection facility; the system further comprises a plurality of flow monitoring units and a signal acquisition alarm unit; the plurality of flow monitoring units are arranged corresponding to the plurality of floor drains; each flow monitoring unit monitors the flow of the floor drain and outputs a corresponding flow monitoring signal; the flow monitoring signal carries room information of a process pipeline room arranged correspondingly; and the signal acquisition alarm unit outputs a leakage alarm signal according to the flow monitoring signal. A floor drain drainage flow monitoring method is adopted, leakage quantification and positioning capacity is achieved, monitoring sensitivity is high, and a room where leakage equipment is located can be positioned. Meanwhile, the instrument requirement can be lowered, and irradiation damage to workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of reactor coolant leakage monitoring, and more particularly to a distributed primary loop pressure boundary leakage monitoring system and method. Background Art

[0002] The reactor coolant pressure boundary involves a large number of equipment, pipelines and valves. Under the erosion of high-temperature and high-pressure coolant water for a long time, it is easy to produce weak links or induce the expansion of original defects and cracks in the boundary, resulting in leakage of the primary circuit system coolant. When the leakage is excessive, the technical specifications of nuclear power plants require the restriction of reactor operation. Therefore, the reactor design must include a leakage monitoring system. At present, the commonly used leakage monitoring methods include the pit liquid level method, the condensate flow method, the airborne radioactive material activity concentration monitoring method, the N-13 concentration monitoring method, the F-18 concentration monitoring method, the acoustic emission monitoring method, the vibration optical fiber leakage monitoring method, and the distributed leakage monitoring method based on temperature and humidity monitoring.

[0003] The pit level method refers to the waste liquid generated by the leakage of the primary coolant being collected in the pit. By monitoring the change of the pit level, the leakage can be monitored and the leakage rate can be calculated. This method is the most commonly used method for nuclear power plant leakage monitoring, but the pit level method does not have the ability to locate the leak. The condensate flow method refers to the steam generated by the leakage of the primary coolant being collected and condensed by the containment ventilation system, and the condensate is discharged to the collection pit. By setting a flow measurement device on the condensate discharge pipeline, the leakage can be monitored and the leakage rate can be calculated. However, this method does not have the ability to locate the leak. The airborne radioactive material activity concentration monitoring method refers to the leakage of the primary coolant into the reactor building air through the evaporation process. The radioactive concentration of inert gas and aerosol particles can be monitored by setting up air sampling monitoring equipment, and the leakage can be monitored. However, the concentration of fission products in the primary coolant is extremely low and difficult to be detected by existing radiation monitoring equipment. The air in the reactor building is not filtered by high-efficiency filters, the particle size of aerosol particles cannot be controlled, and the loss during the sampling process is difficult to assess. Therefore, this method does not have the ability to quantify the leak or locate it.

[0004] The N-13 concentration monitoring method refers to the existence of N-13 in the form of gas, which leaks into the containment atmosphere along with the primary coolant. The activity concentration is monitored by gas sampling monitoring equipment, which can realize leakage monitoring and calculate the leakage rate. However, this method does not have the ability to locate leaks. The F-18 concentration monitoring method refers to the existence of F-18 in the form of solid fluoride salt. When the primary loop leaks, it enters the containment atmosphere through flash evaporation. The F-18 activity concentration is monitored by air sampling monitoring equipment, which can realize leakage monitoring and calculate the leakage rate. However, F-18 exists in the form of particles, and the sampling transmission loss is difficult to assess. Therefore, the F-18 concentration monitoring method can only be used as an auxiliary assessment method. Similarly, methods such as acoustic emission monitoring method, vibration optical fiber leakage monitoring method, and distributed leakage monitoring method based on temperature and humidity monitoring also have the problem of difficulty in quantification. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a distributed primary circuit pressure boundary leakage monitoring system and method 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 distributed primary circuit pressure boundary leakage monitoring system, including: multiple floor drains, multiple waste liquid discharge pipelines corresponding to the multiple floor drains, and waste liquid collection facilities, each of the floor drains is installed in the process pipeline room corresponding to the multiple floor drains, the head end of each waste liquid discharge pipeline is connected to the corresponding floor drain, and the tail end of each floor drain pipeline is connected to the waste liquid collection facility, and also includes: multiple flow monitoring units and signal acquisition alarm units;

[0007] The plurality of flow monitoring units are arranged corresponding to the plurality of floor drains; each of the flow monitoring units is used to monitor the flow of the floor drain arranged corresponding to it, and output a corresponding flow monitoring signal; the flow monitoring signal carries room information of the process pipeline room arranged corresponding to it;

[0008] The signal acquisition alarm unit is connected to the plurality of flow monitoring units and is used for outputting a leakage alarm signal according to the flow monitoring signal.

[0009] In the distributed primary circuit pressure boundary leakage monitoring system of the present invention, the flow monitoring unit is a flow meter;

[0010] The flow meter is installed on the waste liquid discharge pipeline.

[0011] In the distributed primary-loop pressure boundary leakage monitoring system described in the present invention, the flow meter is arranged in a low-irradiation, normal temperature area.

[0012] In the distributed primary circuit pressure boundary leakage monitoring system of the present invention, the signal acquisition alarm unit comprises: a signal acquisition module;

[0013] The signal acquisition module is connected to the multiple flow monitoring units and is used to acquire the flow monitoring signals generated by the multiple flow monitoring units.

[0014] In the distributed primary circuit pressure boundary leakage monitoring system of the present invention, the signal acquisition alarm unit further comprises: a signal processing module;

[0015] The signal processing module is connected to the signal acquisition module, and is used to receive the flow monitoring signal, and perform calculation based on the flow monitoring signal to obtain the leakage rate of the waste liquid.

[0016] In the distributed primary circuit pressure boundary leakage monitoring system of the present invention, the signal acquisition alarm unit further comprises: an alarm module;

[0017] The signal processing module is used to determine whether a leakage occurs in the process pipeline room according to the flow monitoring signal, and output the alarm trigger signal when a leakage occurs;

[0018] The alarm module is connected to the signal processing module and is used to output the leakage alarm signal according to the alarm trigger signal.

[0019] In the distributed primary circuit pressure boundary leakage monitoring system of the present invention, the signal acquisition alarm unit further comprises: a display module;

[0020] The display module is connected to the signal processing module, and is used to receive the leakage information output by the signal processing module, and output and display the leakage information;

[0021] The leakage information includes: equipment information of the flow monitoring unit, room information of the corresponding process pipeline room, flow rate of the waste liquid and leakage rate of the waste liquid.

[0022] The present invention also provides a distributed primary circuit pressure boundary leakage monitoring method, which is applied to the above-mentioned distributed primary circuit pressure boundary leakage monitoring system, and comprises the following steps:

[0023] Each flow monitoring unit monitors the flow of the floor drain corresponding to it and outputs a corresponding flow monitoring signal; the flow monitoring signal carries the room information of the process pipeline room corresponding to it;

[0024] The signal acquisition alarm unit receives the flow monitoring signal and determines whether leakage occurs according to the flow monitoring signal;

[0025] If so, the signal acquisition alarm unit outputs a leakage alarm signal.

[0026] In the distributed primary circuit pressure boundary leakage monitoring method of the present invention, the signal acquisition alarm unit receives the flow monitoring signal, and determines whether leakage occurs according to the flow monitoring signal, including:

[0027] The signal collection and alarm unit receives the flow monitoring signal;

[0028] Analyzing and processing the flow monitoring signal to obtain the flow of the waste liquid;

[0029] Determining whether the flow rate of the waste liquid is greater than a flow rate threshold;

[0030] If so, it is determined that a leak has occurred.

[0031] In the distributed primary circuit pressure boundary leakage monitoring method of the present invention, the signal acquisition alarm unit receives the flow monitoring signal, and determines whether leakage occurs according to the flow monitoring signal, including:

[0032] The signal collection and alarm unit receives the flow monitoring signal;

[0033] Analyzing and processing the flow monitoring signal to obtain the flow of the waste liquid;

[0034] Calculating according to the flow rate of the waste liquid to obtain the leakage rate of the waste liquid;

[0035] Determining whether the leakage rate of the waste liquid is greater than a set value;

[0036] If so, it is determined that a leak has occurred.

[0037] The distributed primary-loop pressure boundary leakage monitoring system and method implemented in the present invention have the following beneficial effects: including multiple floor drains, multiple waste liquid discharge pipelines and waste liquid collection facilities, each floor drain is installed in the process pipeline room, the head end of each waste liquid discharge pipeline is connected to the floor drain, and the tail end of each floor drain pipeline is connected to the waste liquid collection facility, and also includes: multiple flow monitoring units and signal acquisition alarm units; multiple flow monitoring units are set corresponding to multiple floor drains; each flow monitoring unit monitors the flow of the floor drain and outputs a corresponding flow monitoring signal; the flow monitoring signal carries the room information of the process pipeline room set corresponding to it; the signal acquisition alarm unit outputs a leakage alarm signal according to the flow monitoring signal. The present invention adopts the floor drain drainage flow monitoring method to achieve leakage quantification and positioning capabilities, with high monitoring sensitivity, and can be positioned to the room where the leaking equipment is located. At the same time, it can also reduce instrument requirements and reduce radiation damage to workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0039] Figure 1 It is a principle block diagram of the distributed primary circuit pressure boundary leakage monitoring system provided by the present invention;

[0040] Figure 2 It is a flow chart of the distributed primary circuit pressure boundary leakage monitoring method provided by the present invention. DETAILED DESCRIPTION

[0041] 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.

[0042] refer to Figure 1 , Figure 1 This is a principle block diagram of the distributed primary circuit pressure boundary leakage monitoring system provided by the present invention.

[0043] Specifically, Figure 1 As shown, the distributed primary loop pressure boundary leakage monitoring system includes: multiple floor drains, multiple waste liquid discharge pipelines corresponding to the multiple floor drains, and waste liquid collection facilities. Each floor drain is installed in the process pipeline room corresponding to it, the head end of each waste liquid discharge pipeline is connected to the floor drain corresponding to it, and the tail end of each floor drain pipeline is connected to the waste liquid collection facility. Further, the distributed primary loop pressure boundary leakage monitoring system also includes: multiple flow monitoring units 100 and signal acquisition alarm units 200.

[0044] Among them, multiple flow monitoring units 100 are set corresponding to multiple floor drains; each flow monitoring unit is used to monitor the flow of the floor drain set corresponding to it, and output a corresponding flow monitoring signal; the flow monitoring signal carries the room information of the process pipeline room set corresponding to it; the signal acquisition alarm unit 200 is connected to multiple flow monitoring units 100, and is used to output a leakage alarm signal according to the flow monitoring signal.

[0045] like Figure 1 As shown, by setting a floor drain in each process pipeline room of a nuclear power plant, waste liquid is collected by the floor drain, and then transported to the waste liquid collection facility through the waste liquid discharge pipeline, and then sent to the waste liquid treatment system by the waste liquid collection facility for classification treatment. During the normal operation of the nuclear power plant, the waste liquid on the floor of the reactor building is generated by leakage of equipment or pipelines. Therefore, the present invention collects waste liquid through floor drains distributed in different rooms and then discharges it to the waste liquid collection facility through the corresponding floor drain discharge management, and then leakage monitoring can be achieved through the flow monitoring unit.

[0046] In the embodiment of the present invention, the flow monitoring unit is a flow meter; wherein the flow meter is installed on the waste liquid discharge pipeline. The flow meter is set in a low-irradiation, normal temperature area. Specifically, Figure 1 As shown, if there are n process pipeline rooms in a nuclear power plant, then a floor drain is set in each process pipeline room, and there are n floor drains in total, and n flow meters are set accordingly. The waste liquid collected by each floor drain is discharged to the waste liquid collection equipment through the corresponding waste liquid discharge pipeline, and the corresponding flow meter can be installed on the waste liquid discharge pipeline, and the installed flow meters are all set in the low-irradiation, normal temperature area.

[0047] In the embodiment of the present invention, each flow meter is associated and bound to the corresponding process pipeline room, that is, when the flow meter outputs a flow monitoring signal, the room information of the process pipeline room bound to it (such as room location, room number, etc.) can be obtained by parsing its flow monitoring signal, thereby locating the leak, that is, the leak can be located in a specific room. At the same time, since the flow meter is installed on the waste liquid discharge pipeline, the monitoring means and the object to be measured can be spatially separated. Moreover, by centrally arranging the flow meters in low-irradiation, normal temperature areas, the requirements for the flow meters can be reduced and the radiation dose of the staff can be reduced.

[0048] In the embodiment of the present invention, the signal collection alarm unit 200 includes: a signal collection module 201; the signal collection module 201 is connected to the plurality of flow monitoring units 100, and is used to collect the flow monitoring signals generated by the plurality of flow monitoring units 100.

[0049] Furthermore, in the embodiment of the present invention, the signal acquisition alarm unit 200 also includes: a signal processing module 202; the signal processing module 202 is connected to the signal acquisition module 201, and is used to receive a flow monitoring signal, and perform calculations based on the flow monitoring signal to obtain a leakage rate of the waste liquid.

[0050] Furthermore, in an embodiment of the present invention, the signal acquisition alarm unit 200 also includes: an alarm module 203; a signal processing module 202 is used to determine whether a leak occurs in the process pipeline room based on the flow monitoring signal, and output an alarm trigger signal when a leak occurs; the alarm module 203 is connected to the signal processing module 202, and is used to output a leakage alarm signal based on the alarm trigger signal.

[0051] Furthermore, in an embodiment of the present invention, the signal acquisition alarm unit 200 also includes: a display module 204; the display module 204 is connected to the signal processing module 202, and is used to receive the leakage information output by the signal processing module 202, and output and display the leakage information; the leakage information includes: equipment information of the flow monitoring unit, room information of the corresponding process pipeline room, flow rate of waste liquid and leakage rate of waste liquid.

[0052] In an embodiment of the present invention, each flow meter is provided with an independent leakage alarm. When the flow rate outputted by the flow meter exceeds a threshold value (such as the flow rate of the waste liquid of the monitored floor drain is greater than the flow threshold value or the leakage rate of the waste liquid of the monitored floor drain is greater than the set value), the alarm is triggered and the alarm module 203 outputs a corresponding leakage alarm signal, thereby reminding the staff to handle the problem in a timely manner and provide the room information of the process pipeline room where the leakage is located.

[0053] The present invention adopts the floor drain drainage flow monitoring method, which can simultaneously have the leakage quantification and positioning capabilities, has high monitoring sensitivity, and can locate the room where the leaking equipment is located; by spatially decoupling the leakage monitoring means from the object to be measured, the monitoring instrument can be installed in a low-radiation, low-temperature area, reducing the instrument requirements and reducing the radiation damage to the staff.

[0054] refer to Figure 2 , Figure 2 A schematic flow chart of a distributed primary circuit pressure boundary leakage monitoring method provided by the present invention.

[0055] Among them, the distributed primary circuit pressure boundary leakage monitoring method can be applied to the distributed primary circuit pressure boundary leakage monitoring system disclosed in the embodiment of the present invention.

[0056] Specifically, Figure 2 As shown, the distributed primary circuit pressure boundary leakage monitoring method includes the following steps:

[0057] Step S201: Each flow monitoring unit monitors the flow of the floor drain corresponding to it and outputs a corresponding flow monitoring signal; the flow monitoring signal carries the room information of the process pipeline room corresponding to it. Among them, the flow monitoring unit adopted by the present invention is a flow meter, and the flow meter is installed on the waste liquid discharge pipeline to achieve spatial decoupling of the monitoring means and the object to be measured. At the same time, the flow meter can be centrally arranged in a low-irradiation, normal temperature area, thereby reducing the requirements for the flow meter (that is, the flow meter does not need to have high temperature and high pressure resistance capabilities, which indirectly reduces the equipment cost) and reduces the radiation dose of the staff.

[0058] Step S202: The signal collection alarm unit 200 receives the flow monitoring signal and determines whether a leakage occurs according to the flow monitoring signal.

[0059] In an embodiment of the present invention, the signal acquisition alarm unit 200 receives a flow monitoring signal, and determines whether a leakage occurs based on the flow monitoring signal, including: the signal acquisition alarm unit 200 receives a flow monitoring signal; analyzes and processes the flow monitoring signal to obtain the flow of the waste liquid; determines whether the flow of the waste liquid is greater than a flow threshold; if so, determines that a leakage occurs.

[0060] Alternatively, in an embodiment of the present invention, the signal acquisition alarm unit 200 receives a flow monitoring signal, and determines whether a leakage occurs based on the flow monitoring signal, including: the signal acquisition alarm unit 200 receives the flow monitoring signal; analyzes and processes the flow monitoring signal to obtain the flow of the waste liquid; calculates based on the flow of the waste liquid to obtain the leakage rate of the waste liquid; determines whether the leakage rate of the waste liquid is greater than a set value; if so, determines that a leakage occurs.

[0061] Step S203: If yes, the signal acquisition alarm unit 200 outputs a leakage alarm signal.

[0062] In the embodiment of the present invention, the signal acquisition unit includes: a signal acquisition module 201. The signal acquisition module 201 is connected to the plurality of flow monitoring units 100 and is used to acquire flow monitoring signals generated by the plurality of flow monitoring units 100.

[0063] Furthermore, in the embodiment of the present invention, the signal acquisition alarm unit 200 further includes: a signal processing module 202;

[0064] The signal processing module 202 is connected to the signal acquisition module 201 and is used to receive the flow monitoring signal and perform calculations based on the flow monitoring signal to obtain the leakage rate of the waste liquid.

[0065] Furthermore, in the embodiment of the present invention, the signal acquisition alarm unit 200 further includes: an alarm module 203;

[0066] The signal processing module 202 is used to determine whether a leakage occurs in the process pipeline room according to the flow monitoring signal, and output an alarm trigger signal when a leakage occurs; the alarm module 203 is connected to the signal processing module 202 and is used to output a leakage alarm signal according to the alarm trigger signal.

[0067] Furthermore, in the embodiment of the present invention, the signal acquisition alarm unit 200 further includes: a display module 204;

[0068] The display module 204 is connected to the signal processing module 202, and is used to receive the leakage information output by the signal processing module 202, and output and display the leakage information;

[0069] The leakage information includes: equipment information of the flow monitoring unit, room information of the corresponding process pipeline room, flow rate of the waste liquid and leakage rate of the waste liquid.

[0070] Specifically, pressurized water reactor nuclear power plants are equipped with ground waste liquid collection facilities to collect ground waste liquid generated in the rooms where the process equipment of the reactor building is located (i.e., the process pipeline room), and then the waste liquid collection facilities are sent to the waste liquid treatment system for classification and treatment. Among them, during the normal operation of the nuclear power plant, the ground waste liquid in the reactor kitchen is generated by leakage of equipment or pipelines, which is collected through floor drains distributed in different rooms and discharged to the waste liquid collection facility by the waste liquid discharge management. Therefore, setting a flow meter in the waste liquid discharge management can realize leakage monitoring.

[0071] Among them, flow meters are separately set on the waste liquid discharge management lines of different process pipeline rooms, and then the leakage rate is obtained according to the measured flow of the flow meter. Since the ground waste liquid generated by the leakage is generally confined to the same room, the leakage can be located in a specific room by associating and binding the flow meter with the process pipeline room and then obtaining the waste liquid flow according to the flow meter measurement. At the same time, installing a flow meter on the waste liquid discharge pipeline can decouple the monitoring method from the measured object in space. Therefore, the flow meter can be concentrated in a low-irradiation, normal temperature area, thereby reducing the requirements for the flow meter and reducing the radiation dose of the staff.

[0072] In addition, each flow meter is also equipped with an independent leakage alarm, that is, when the flow rate monitored by any flow meter exceeds the threshold, the alarm is triggered to remind the staff to calculate in time and provide information about the room where the leakage is located, so as to achieve the ability to monitor the leakage quantitatively and locate it at the same time.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The present invention is described by some embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present invention.

[0077] For ease of explanation, special terms are used in the foregoing description to facilitate a thorough understanding of the present invention. However, these specific details are not necessary for those skilled in the art to implement the present invention. In other examples, known circuits and devices are shown in the form of block diagrams in the accompanying drawings to avoid unnecessary distraction from the key points of the present invention. Therefore, the purpose of the above description of specific embodiments of the present invention is to illustrate and describe. These embodiments are not exhaustive, that is, the present invention is not limited to the precise form disclosed; it is obvious that various modifications and changes can be made to these embodiments under the teachings of the present invention. The selection and description of the embodiments are to make the best explanation of the principles of the present invention and its practical application, so that those skilled in the art can best utilize the present invention and modify various embodiments to suit special purposes. The scope of the present invention is defined by the claims of the present invention and their equivalents.

Claims

1. A distributed primary circuit pressure boundary leakage monitoring system, comprising: A plurality of floor drains, a plurality of waste liquid discharge pipelines corresponding to the plurality of floor drains, and a waste liquid collection facility, wherein each of the floor drains is installed in a corresponding process pipeline room, the head end of each of the waste liquid discharge pipelines is connected to the corresponding floor drain, and the tail end of each of the floor drain pipelines is connected to the waste liquid collection facility, characterized in that it also includes: a plurality of flow monitoring units and a signal acquisition alarm unit; The plurality of flow monitoring units are arranged corresponding to the plurality of floor drains; each of the flow monitoring units is used to monitor the flow of the floor drain arranged corresponding to it, and output a corresponding flow monitoring signal; the flow monitoring signal carries room information of the process pipeline room arranged corresponding to it; The signal acquisition alarm unit is connected to the plurality of flow monitoring units and is used for outputting a leakage alarm signal according to the flow monitoring signal.

2. The distributed primary circuit pressure boundary leakage monitoring system according to claim 1 is characterized in that: The flow monitoring unit is a flow meter; The flow meter is installed on the waste liquid discharge pipeline.

3. The distributed primary circuit pressure boundary leakage monitoring system according to claim 2 is characterized in that: The flow meter is arranged in a low-irradiation, normal-temperature area.

4. The distributed primary circuit pressure boundary leakage monitoring system according to claim 1 is characterized in that: The signal acquisition alarm unit comprises: a signal acquisition module; The signal acquisition module is connected to the multiple flow monitoring units and is used to acquire the flow monitoring signals generated by the multiple flow monitoring units.

5. The distributed primary circuit pressure boundary leakage monitoring system according to claim 4 is characterized in that: The signal acquisition alarm unit also includes: a signal processing module; The signal processing module is connected to the signal acquisition module, and is used to receive the flow monitoring signal, and perform calculation based on the flow monitoring signal to obtain the leakage rate of the waste liquid.

6. The distributed primary circuit pressure boundary leakage monitoring system according to claim 5 is characterized in that: The signal acquisition alarm unit further includes: an alarm module; The signal processing module is used to determine whether a leakage occurs in the process pipeline room according to the flow monitoring signal, and output the alarm trigger signal when a leakage occurs; The alarm module is connected to the signal processing module and is used to output the leakage alarm signal according to the alarm trigger signal.

7. The distributed primary circuit pressure boundary leakage monitoring system according to claim 5 is characterized in that: The signal acquisition alarm unit also includes: a display module; The display module is connected to the signal processing module, and is used to receive the leakage information output by the signal processing module, and output and display the leakage information; The leakage information includes: equipment information of the flow monitoring unit, room information of the corresponding process pipeline room, flow rate of the waste liquid and leakage rate of the waste liquid.

8. A distributed primary circuit pressure boundary leakage monitoring method, applied to the distributed primary circuit pressure boundary leakage monitoring system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Each flow monitoring unit monitors the flow of the floor drain corresponding to it and outputs a corresponding flow monitoring signal; the flow monitoring signal carries the room information of the process pipeline room corresponding to it; The signal acquisition alarm unit receives the flow monitoring signal and determines whether leakage occurs according to the flow monitoring signal; If so, the signal acquisition alarm unit outputs a leakage alarm signal.

9. The distributed primary circuit pressure boundary leakage monitoring method according to claim 8 is characterized in that: The signal acquisition alarm unit receives the flow monitoring signal, and determines whether leakage occurs according to the flow monitoring signal, including: The signal collection and alarm unit receives the flow monitoring signal; Analyzing and processing the flow monitoring signal to obtain the flow of the waste liquid; Determining whether the flow rate of the waste liquid is greater than a flow rate threshold; If so, it is determined that a leak has occurred.

10. The distributed primary circuit pressure boundary leakage monitoring method according to claim 8, characterized in that: The signal acquisition alarm unit receives the flow monitoring signal, and determines whether leakage occurs according to the flow monitoring signal, including: The signal collection and alarm unit receives the flow monitoring signal; Analyzing and processing the flow monitoring signal to obtain the flow of the waste liquid; Calculating according to the flow rate of the waste liquid to obtain the leakage rate of the waste liquid; Determining whether the leakage rate of the waste liquid is greater than a set value; If so, it is determined that a leak has occurred.

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