Monitoring system

Abstract

The invention provides a monitoring system, which is applied to a nuclear power generation system and comprises a containment vessel, a first cable is arranged in the containment vessel, and the monitoring system comprises a first information acquisition assembly, a data processing device and a display device; the first information acquisition assembly comprises a first temperature sensor and a first radiation kit used for detecting the radiation dose rate, the first temperature sensor and the first radiation kit are arranged on the side portion of the first cable, and the first temperature sensor is electrically connected with the display device through the data processing device. According to the scheme provided by the embodiment of the invention, the problems that in the prior art, the cable is aged and degraded, and safety accidents are likely to occur can be solved.

Description

Technical Field

[0001] The present invention relates to the field of monitoring technologies, and particularly to a monitoring system. Background Art

[0002] The safety-class cables in nuclear power plants are important electrical equipment that constitutes the power, instrumentation, and control systems of nuclear power plants, and is closely related to the safe operation of nuclear power plants. In the prior art, due to the high temperature and high radiation in nuclear power plants, the cables will age and degrade, and safety accidents are likely to occur. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a monitoring system, which can solve the problems in the prior art that the cables age and degrade, and safety accidents are likely to occur.

[0004] To solve the above technical problems, the present invention is implemented as follows:

[0005] The embodiments of the present invention provide a monitoring system, which is applied to a nuclear power generation system. The nuclear power generation system includes: a containment vessel, and a first cable is provided in the containment vessel. The monitoring system includes a first information acquisition component, a data processing device, and a display device;

[0006] The first information acquisition component includes a first temperature sensor and a first radiation kit for detecting the radiation dose rate. The first temperature sensor and the first radiation kit are respectively arranged on the side of the first cable, and the first temperature sensor is electrically connected to the display device through the data processing device.

[0007] In the embodiments of the present invention, a first cable is provided in the containment vessel. The first temperature sensor and the first radiation kit are respectively arranged on the side of the first cable. The temperature is detected by the first temperature sensor and the radiation dose rate is detected by the first radiation kit, and then transmitted to the data processing device, and then transmitted to the display device by the data processing device. Such a setting can better monitor the environmental temperature and radiation amount, which is beneficial to providing a reference for the subsequent cable aging management work. Description of the Drawings

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below.

[0009] Figure 1 It is a schematic structural diagram of a monitoring system provided by the embodiments of the present invention. Detailed Embodiments

[0010] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0011] The terms "first", "second", etc. in the description and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention can be implemented in an order different from those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or multiple.

[0012] An embodiment of the present invention provides a monitoring system. Please refer to Figure 1 which is a monitoring system provided by an embodiment of the present invention and is applied to a nuclear power generation system. The nuclear power generation system includes: a containment vessel 10, and a first cable is provided inside the containment vessel 10. The monitoring system includes a first information collection component, a data processing device, and a display device 90;

[0013] The first information collection component includes a first temperature sensor 50 and a first radiation kit 40 for detecting the radiation dose rate. The first temperature sensor 50 and the first radiation kit 40 are respectively arranged on the side of the first cable, and the first temperature sensor 50 is electrically connected to the display device 90 through the data processing device.

[0014] In this embodiment, the first cable refers to the operating cable that is used in a nuclear power plant under normal conditions. Based on the screening principles such as the list of safety-important systems, equipment, instruments, cable layout-related documents, high temperature, high humidity, radiation zoning, and plant layout drawings, the location information for the layout is obtained. Finally, the temperature sensors are installed according to the on-site construction conditions. There is a first cable inside the containment 10, and the first temperature sensor 50 and the first radiation kit 40 are respectively arranged on the side of the first cable. The first radiation kit 40 is used to periodically collect the radiation data of the cable operating environment. Among them, the radiation dose monitoring is carried out periodically using alanine dosimeters. The room temperature and the temperature of the area are monitored in real time and are electrically connected to the display device 90 in the main control room 100 through a data processing device. The number of temperature sensors arranged can be determined according to the on-site engineering and economic conditions. However, in order to effectively reflect the cable degradation and abnormalities in real time and provide strong data support for the subsequent cable and the nuclear power plant license renewal, it is recommended that the number of layout points of the temperature sensors be greater than 25. Such a setting can better monitor the environmental temperature and radiation dose, which is beneficial to providing a reference for the subsequent cable aging management work.

[0015] Optionally, the nuclear power generation system further includes a reactor coolant loop, and the first cable is arranged adjacent to the reactor coolant loop.

[0016] Please refer to Figure 1 , the nuclear power generation system further includes a reactor coolant loop 20, and the first cable is arranged adjacent to the reactor coolant loop 20. According to the screening principles, the selected cables are the K1 and K3 class low-voltage power cables and the K1, K3, and KS class measurement and control cables in the containment 10 building.

[0017] In this embodiment, by arranging the first cable near the reactor coolant loop, the real-time data of the temperature in each room and area can be better monitored.

[0018] Optionally, the monitoring system includes a plurality of the first information collection components arranged at intervals along the length direction of the first cable.

[0019] Please refer to Figure 1 , the monitoring system includes a plurality of first information collection components arranged at intervals along the length direction of the first cable. The first information collection component includes a first temperature sensor 50 and a first radiation kit 40 for detecting the radiation dose rate

[0020] In this embodiment, the first cable is a cable normally used in a nuclear power plant. The first temperature sensor 50 is mainly used to measure the ambient temperature of the first cable and the sample-retaining cable. The technical specification adopts RTD, and the radiation tolerance dose is not less than 62.5 kGy. Here, RTD refers to a resistance temperature detector. The first radiation kit 40 is used to periodically collect the radiation data of the cable operating environment, which can better monitor the regional temperature and radiation dose.

[0021] Optionally, the nuclear power generation system further includes a second cable located outside the containment. The monitoring system includes a second information acquisition component. The second information acquisition component includes a second temperature sensor and a second radiation kit for detecting the radiation dose rate. The second temperature sensor and the second radiation kit are respectively arranged on the side of the first cable, and the second temperature sensor is electrically connected to the display device through the data processing device.

[0022] Please refer to Figure 1 , the nuclear power generation system further includes a second cable located outside the containment 10. The monitoring system includes a second information acquisition component. The second information acquisition component includes a second temperature sensor 130 and a second radiation kit 110 for detecting the radiation dose rate. The second temperature sensor 130 and the second radiation kit 110 are respectively arranged on the side of the first cable, and the second temperature sensor 130 is electrically connected to the display device through the data processing device. The data processing device includes a data acquisition device 60 and a data analysis device 80. The second temperature sensor 130 outside the containment 10 is connected to the data acquisition device 60 through hard wiring. The second radiation kit 110 is used to periodically collect the radiation data of the cable operating environment. Among them, the radiation dose monitoring is carried out periodically by using alanine dosimeters. The data acquisition device 60 and the data analysis device 80 mainly receive the temperature signals of the temperature sensors, convert the signals of the temperature sensors into digital signals and then send them to the monitoring system through the electrical penetration 70 through the network.

[0023] In this embodiment, the second cable is a cable normally used in a nuclear power plant ， The acquisition cabinet mainly acquires the real-time data of the temperature sensors arranged at various rooms and regions on site. At the same time, the radiation dose data of the radiation kit is also manually input regularly. The data analysis device 80 records the temperature and radiation dose data, and records the long-term changes in temperature and radiation dose. At the same time, during the regular tests, the test data of the cable is compared with the basic data of the sample-retaining cable to calculate the aging life trend.

[0024] Optionally, the nuclear power generation system further includes a main steam isolation valve located outside the containment, and the second cable is arranged on the side of the main steam isolation valve.

[0025] Please refer to Figure 1, the nuclear power generation system further includes a main steam isolation valve 140 located outside the containment 10, and a second cable is disposed on the side of the main steam isolation valve 140.

[0026] In this embodiment, the main steam isolation valve 140 refers to a main steam isolation valve used in the secondary main steam system of a pressurized water reactor nuclear power plant, arranged on the top of the nuclear safety-related building and the electrical building, located outside the containment 10. It (the main steam isolation valve and the driving device) shall be designed to prevent overpressure of the containment when a main steam pipe inside the containment between the steam generator and the main steam isolation valve ruptures, and limit the cooling of the main system due to the rupture of the steam pipe. A room where the main steam isolation valve 140 is located is selected in the high-temperature or high-radiation area outside the containment 10, and the temperature and radiation data of the room with the main steam isolation valve 140 are monitored in real time through the second temperature sensor 130 and the second radiation kit 110.

[0027] Optionally, the first information collection component further includes a first sample-retaining cable, the first sample-retaining cable is disposed on the side of the first cable, and the first sample-retaining cable is in a non-powered state.

[0028] Please refer to Figure 1 , the first information collection component further includes a first sample-retaining cable 30, the first sample-retaining cable 30 is disposed on the side of the first cable, and the first sample-retaining cable 30 is in a non-powered state.

[0029] In this embodiment, the first sample-retaining cable 30 is retained in the cable tray without wiring. The temperature monitoring of the first sample-retaining cable 30 adopts an on-line measurement method, and a first temperature sensor 50 is arranged in the sample-retaining cable tray to monitor its ambient temperature.

[0030] Optionally, the first cable and the first sample-retaining cable are of the same type of cable.

[0031] Please refer to Figure 1 , the first cable and the first sample-retaining cable 30 are of the same type of cable.

[0032] In this embodiment, the first sample-retaining cable 30 is the same as the cable information after screening, and the owner can adjust it according to the actual situation of the nuclear power plant. Within a specified time interval, regular sampling tests are carried out on the first sample-retaining cable 30. The specific test items and requirements should be formulated in combination with the actual situation of the nuclear power plant (generally including tests such as elongation at break, compression modulus, oxidation induction period, DBE accident capacity, elongation at break after the accident, insulation resistance, etc.). The cycle of environmental monitoring continues throughout each refueling cycle, so that environmental changes caused by seasonal effects and different unit operating states can be identified.

[0033] Optionally, the second information collection component further includes a second sample-retaining cable, which is disposed on the side of the second cable and is in a non-energized state.

[0034] Please refer to Figure 1 , the second information collection component further includes a second sample-retaining cable 120, which is disposed on the side of the second cable and is in a non-energized state.

[0035] In this embodiment, the second sample-retaining cable 120 is placed in the cable tray without wiring. The temperature of the second sample-retaining cable 120 is monitored by an online measurement method. A second temperature sensor 130 is arranged in the sample-retaining cable tray to monitor its ambient temperature.

[0036] Optionally, the second cable and the second sample-retaining cable are of the same type.

[0037] Please refer to Figure 1 , the second cable and the second sample-retaining cable 120 are of the same type.

[0038] In this embodiment, the second sample-retaining cable 120 is the same as the cable information after screening, and the owner can adjust it according to the actual situation of the nuclear power plant. At regular time intervals, regular sampling tests are carried out on the second sample-retaining cable 120. The specific test items and requirements should be formulated in combination with the actual situation of the nuclear power plant (generally including tests such as elongation at break, compression modulus, oxidation induction period, DBE accident capacity, elongation at break after accident, insulation resistance, etc.). The environmental monitoring period lasts for each refueling cycle, so that environmental changes caused by seasonal effects and different unit operating states can be identified.

[0039] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A monitoring system, characterized in that, Applied to a nuclear power generation system, the nuclear power generation system includes a containment vessel, a first cable is provided inside the containment vessel, and the monitoring system includes a first information acquisition component, a data processing device, and a display device; The first information acquisition component includes a first temperature sensor and a first radiation kit for detecting the radiation dose rate. The first temperature sensor and the first radiation kit are respectively arranged on the side of the first cable, and the first temperature sensor is electrically connected to the display device through the data processing device.

2. The monitoring system according to claim 1, characterized in that, The nuclear power generation system further includes a reactor coolant loop, and the first cable is arranged adjacent to the reactor coolant loop.

3. The monitoring system according to claim 2, characterized in that The monitoring system includes a plurality of the first information acquisition components arranged at intervals along the length direction of the first cable.

4. The monitoring system according to claim 1, characterized in that, The nuclear power generation system further includes a second cable located outside the containment vessel. The monitoring system includes a second information acquisition component. The second information acquisition component includes a second temperature sensor and a second radiation kit for detecting the radiation dose rate. The second temperature sensor and the second radiation kit are respectively arranged on the side of the second cable, and the second temperature sensor is electrically connected to the display device through the data processing device.

5. The monitoring system according to claim 1, characterized in that The nuclear power generation system further includes a main steam isolation valve located outside the containment vessel, and the second cable is arranged on the side of the main steam isolation valve.

6. The monitoring system according to claim 1, characterized in that The first information acquisition component further includes a first sample-retaining cable, the first sample-retaining cable is arranged on the side of the first cable, and the first sample-retaining cable is in a non-powered state.

7. The monitoring system according to claim 6, characterized in that, The first cable and the first sample-retaining cable are of the same type of cable.

8. The monitoring system according to claim 4, wherein The second information acquisition component further includes a second sample-retaining cable, the second sample-retaining cable is arranged on the side of the second cable, and the second sample-retaining cable is in a non-powered state.

9. The monitoring system according to claim 8, characterized in that, The second cable and the second sample-retaining cable are of the same type of cable.

Images