Compression test control method and device of containment and electronic equipment

Abstract

The invention is suitable for the technical field of nuclear power, and provides a containment pressure test control method and device and electronic equipment, and the method comprises the steps: receiving a test instruction for carrying out a pressure test on a containment; and if the test instruction is an instruction for performing pressure relief treatment on the containment vessel, controlling a corresponding regulating valve according to a predetermined opening degree of the regulating valve of a nuclear auxiliary plant ventilation system DVN so as to guide gas of the containment vessel to enter the DVN system through a containment vessel ventilation system EBA to be discharged. By means of the method, the duration needed by the pressing test can be shortened, and the operation efficiency of the unit is improved.

Description

Technical Field

[0001] This application belongs to the field of nuclear power technology, and in particular relates to methods, devices, electronic equipment, computer-readable storage media and computer program products for controlling the pressure test of containment. Background Technology

[0002] A nuclear power plant is a facility that generates electricity using nuclear fission energy. It releases a large amount of energy through a controlled nuclear fission reaction, splitting the nuclei of atoms in nuclear fuel (usually uranium-235 or plutonium-239). This energy is primarily in the form of heat, which is then converted into electrical energy. Because nuclear power plants produce radioactive materials during operation, and these materials are highly hazardous to human health, a containment structure is constructed to reduce the probability of radioactive material leaking from the reactor into the external environment. This containment structure is a sealed, robust outer shell that encloses critical equipment such as the reactor and steam generator to prevent radioactive material from leaking into the external environment in the event of a nuclear accident.

[0003] According to the Code for Design and Construction of Nuclear Island Structures (RCC-G), nuclear power plants are required to conduct a Containment Tightness Test (CTT) every ten years before the first loading of nuclear fuel, after the first major overhaul, and after commercial operation. The CTT involves injecting high-pressure gas into the containment (pressurization) and then testing the containment's seal and structural strength at the design pressure to determine its ability to effectively isolate radioactive materials under accident conditions. After pressurization, the CTT releases the high-pressure gas injected into the containment (depressurization).

[0004] Because gas transfer is required during CTT testing, the existing ventilation system of the nuclear power plant must be utilized. However, the current method results in a long CTT test duration, which affects the operation of the unit conducting the test and leads to low operating efficiency. Summary of the Invention

[0005] This application provides a method, apparatus, and electronic equipment for controlling the pressure test of the containment, which can solve the problem of low operating efficiency of the unit.

[0006] In a first aspect, embodiments of this application provide a method for controlling a pressure test of a containment vessel, including: Receive test instructions to perform a pressure test on the containment vessel; If the test command is to depressurize the containment, the corresponding regulating valve is controlled according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system (DVN) to guide the gas in the containment through the containment ventilation system (EBA) into the DVN system for discharge.

[0007] In this embodiment, upon receiving a test command for a containment pressure test (CTT test), if it is determined that the test command is for depressurizing the containment, the corresponding regulating valve is controlled according to the pre-determined opening of the regulating valve of the nuclear auxiliary building ventilation system (DVN system) to guide the containment gas through the containment ventilation system (EBA system) into the DVN system for discharge. Since the depressurization process for the CTT test is performed using both the EBA and DVN systems, and the DVN system's iodine exhaust design flow rate is 32400 m³ / h, it can meet the requirement of increasing the depressurization rate to 400 mbar / h (corresponding to a depressurization flow rate of 19760 m³ / h). That is, using both the EBA and DVN systems during the CTT test depressurization process can significantly increase the depressurization rate, thereby shortening the time required for the CTT test and improving the unit's operating efficiency.

[0008] Secondly, embodiments of this application provide a pressure test control device for a containment vessel, comprising: The test command receiving module is used to receive test commands for performing a pressure test on the containment vessel; The depressurization module is used to control the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system (DVN) if the test command is to depressurize the containment, so as to guide the gas in the containment through the containment ventilation system (EBA) into the DVN system for discharge.

[0009] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in the first aspect.

[0010] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect.

[0011] Fifthly, embodiments of this application provide a computer program product that, when run on an electronic device, causes the electronic device to execute the method described in the first aspect above.

[0012] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic flowchart of a pressure test control method for a containment provided in one embodiment of this application; Figure 2 This is a schematic diagram illustrating the connection between an EBA system and a DVN system according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a containment pressure test control device according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0015] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0016] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0017] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0018] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0019] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized.

[0020] A nuclear power plant is a facility that generates electricity using nuclear fission energy. Because the nuclear reactor produces a large amount of heat during operation, a ventilation system is needed to introduce fresh air from outside and expel hot air from inside the plant to lower the internal temperature. Furthermore, the ventilation system also traps radioactive dust, reducing the probability of radioactive materials leaking into the external environment.

[0021] The ventilation system of a nuclear power plant includes: 1. Containment Filtration and Exhaust System (EUF). This EUF removes radioactive materials from the gas using a Venturi scrubbing solution. One EUF system is shared by two units.

[0022] 2. Containment Atmosphere Monitoring and Control System - Fuel Building Ventilation System (ETY-DVK).

[0023] 3. Containment Atmosphere Monitoring and Control System - Containment Peripheral Rooms Ventilation System (ETY-DVW).

[0024] 4. Containment Sweeping Ventilation System (EBA) and Nuclear Auxiliary Building Ventilation System (DVN).

[0025] Because CTT tests are conducted infrequently, the existing ventilation system of the nuclear power plant is usually selected for the CTT test, rather than a completely new ventilation system being built. For example, the depressurization process for the CTT test can be performed using the ETY-DVK or ETY-DVW system. However, since the ETY-DVK system has a depressurization flow rate of only 1500 m³ / h (corresponding to a depressurization rate of 30.4 mbar / h), and the maximum depressurization flow rate achievable by the ETY-DVW system is 9800 m³ / h for odd-numbered units (corresponding to a depressurization rate of 199 mbar / h) and 8800 m³ / h for even-numbered units (corresponding to a depressurization rate of 178 mbar / h), the depressurization rate is low regardless of whether the depressurization is performed through the ETY-DVK or ETY-DVW system (e.g., neither can reach 400 mbar / h (corresponding to a depressurization flow rate of 19760 m³ / h)). Therefore, the time required for CTT testing is longer, thus reducing the operating efficiency of the units.

[0026] In order to shorten the duration of the CTT test and improve the operating efficiency of the unit, it is necessary to find a new ventilation system.

[0027] For EUF systems, considering that an EUF system is shared by two units, and a CTT test is usually conducted on one unit, if the EUF system is used for depressurization during a CTT test, the safety functions of the other unit (i.e., the unit that did not undergo CTT testing) will be compromised because it is still operating. Furthermore, since the Venturi scrubbing fluid in the EUF system is a consumable and needs to be replaced after each use, there is no repair route in case of equipment damage. Therefore, it is not recommended to use the EUF system for depressurization during a CTT test.

[0028] For the EBA and DVN systems, since the EBA system is isolated during the decompression test, meaning it is not required to perform containment ventilation, the containment isolation valve can be opened for decompression. Furthermore, since the DVN system's iodine exhaust flow rate is designed to be 32,400 m³ / h, its decompression flow rate can meet the requirement of a decompression rate of 400 mbar / h (corresponding to a decompression flow rate of 19,760 m³ / h). Therefore, although the EBA-DVN system was previously isolated during CTT testing, the inventors of this application have determined through analysis that decompression can be performed using the EBA-DVN system, and that a higher decompression rate can still be achieved when using the EBA-DVN system for decompression.

[0029] The pressure test control method for containment provided in the embodiments of this application is described below with reference to the accompanying drawings.

[0030] Figure 1 A schematic flowchart of a pressure test control method for a containment structure provided in an embodiment of this application is shown. This method can be applied to electronic devices, and is described in detail below: S11. Receive the test command to perform a pressure test on the containment vessel.

[0031] The pressure test here refers to the CTT test, which is a type of operating condition for the unit.

[0032] Specifically, the aforementioned test instructions are used to instruct electronic equipment to perform a pressure test on the containment vessel, for example, to depressurize the containment vessel.

[0033] In this embodiment of the application, the above-mentioned test instructions can be issued by the user by triggering the corresponding button or by voice, and there is no limitation here.

[0034] S12. If the above test instruction is an instruction to depressurize the above containment, the corresponding regulating valve shall be controlled according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system DVN, so as to guide the gas in the above containment through the containment ventilation system EBA into the DVN system for discharge.

[0035] The DVN system includes a fan, exhaust ducts, and regulating valves. These regulating valves include supply air regulating valves and exhaust air regulating valves. The exhaust air regulating valve, located on the exhaust duct, adjusts the resistance of the exhaust duct to accommodate the fan head. When the exhaust air regulating valve is fully closed, its flow path is blocked, preventing gas from passing through the valve into the downstream exhaust duct and thus also preventing it from reaching and flowing through the fan at the end of the exhaust duct.

[0036] In this context, the opening degree of a control valve refers to the relative displacement of the valve core (or valve disc, valve plate) from the fully closed position, used to express the percentage or angle of the control valve's opening. For example, 0% opening degree = the control valve is completely closed (no flow or only minimal leakage is allowed), and 100% opening degree = the control valve is completely open (maximum flow area, minimum pressure drop). Of course, if the opening degree of the control valve is between 0% and 100%, it means that the control valve is not fully open.

[0037] In this embodiment, it can be pre-determined which fans in the DVN system need to be put into operation. After determining the fans that need to be put into operation (i.e., the fans used to discharge gases for CTT testing), the opening degree of the corresponding regulating valve is determined according to the exhaust duct where the fans to be put into operation are located. For example, assuming that fan 1 is the fan that needs to be put into operation, the exhaust regulating valve connected to fan 1 is placed in the open (fully open or partially open) position to ensure unobstructed airflow. That is, before controlling the corresponding regulating valve according to the pre-determined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the following steps are also included: Determine the fans to be put into operation in the aforementioned DVN system; determine the opening degree of the regulating valves of the aforementioned DVN system based on the determined fans.

[0038] Specifically, identify the exhaust duct connected to the operational fan, and then set the opening of the regulating valve controlling the gas inflow into that exhaust duct to be greater than 0 (i.e., not closed). This means the regulating valve is set to be open during the depressurization process of the CTT test. Optionally, considering that a DVN system typically includes multiple regulating valves, to prevent gas from flowing into other exhaust ducts (i.e., exhaust ducts not connected to the operational fan), the regulating valves on the exhaust ducts of fans not in operation within the DVN system can be closed.

[0039] During the depressurization process before the CTT test, the containment isolation valve in the EBA system is opened to allow containment gases to pass through the EBA system. Then, the corresponding regulating valves in the DVN system are controlled according to the pre-determined opening degree, so that after the depressurization process begins, the controlled gas enters the corresponding exhaust duct through the opened regulating valve and is finally discharged from the DVN system.

[0040] In this embodiment, upon receiving a test command for a containment pressure test (CTT test), if it is determined that the test command is for depressurizing the containment, the corresponding regulating valve is controlled according to the pre-determined opening of the regulating valve of the nuclear auxiliary building ventilation system (DVN system) to guide the containment gas through the containment ventilation system (EBA system) into the DVN system for discharge. Since the depressurization process for the CTT test is performed using both the EBA and DVN systems, and the DVN system's iodine exhaust design flow rate is 32400 m³ / h, it can meet the requirement of increasing the depressurization rate to 400 mbar / h (corresponding to a depressurization flow rate of 19760 m³ / h). That is, using both the EBA and DVN systems during the CTT test depressurization process can significantly increase the depressurization rate, thereby shortening the time required for the CTT test and improving the unit's operating efficiency.

[0041] In some embodiments, the DVN system described above can ventilate at least two units, meaning the fans of the DVN system are shared by all units. In this case, the DVN system of this application embodiment includes, in addition to fans, exhaust ducts, and regulating valves, an isolation valve. By controlling the opening and closing of the isolation valve, the fan to which the gas flows can be selected. In this application embodiment, the correspondence between each unit and the isolation valve under different operating conditions can be preset, so that the corresponding isolation valve can be determined after the units and operating conditions are determined. That is, determining the fans to be put into operation in the DVN system includes: A1. Determine the unit to be subjected to the above pressure test.

[0042] A2. Based on the determined units, determine the isolation valves that need to be opened in the DVN system. Among them, when each isolation valve that needs to be opened is opened, the fan that allows the gas to be discharged for the pressure test to flow in is the fan for the DVN system to be put into operation.

[0043] An isolation valve is a type of valve used to completely shut off or isolate the flow of fluids (gas or liquid). When an isolation valve is open, it allows gas to flow into the fan through the exhaust duct where the isolation valve is located.

[0044] In this embodiment of the application, considering that the DVN system can provide ventilation for at least two units, and that the isolation valves corresponding to the same unit under different operating conditions are usually different, and the isolation valves corresponding to different units under the same operating condition may also be different, it is necessary to first determine which unit is being pressure tested in order to determine the fan to be put into operation based on the correspondence between the unit, the unit's operating condition and the isolation valve.

[0045] The different isolation valves used by different generating units under different operating conditions include: all isolation valves being different; for example, if the isolation valves for unit 1 might be isolation valve 1, isolation valve 3, and isolation valve 5, then the isolation valves for unit 2 might be isolation valve 2, isolation valve 4, and isolation valve 6. Furthermore, the different isolation valves for different generating units also include: some isolation valves being different; for example, if the isolation valves for unit 1 might be isolation valve 1, isolation valve 3, and isolation valve 5, then the isolation valves for unit 2 might be isolation valve 1, isolation valve 2, isolation valve 4, and isolation valve 6.

[0046] In this embodiment, the unit to be pressure tested is first determined, and then the fans to be put into operation in the DVN system are determined based on the determined unit. Since the DVN system can ventilate at least two units, and the isolation valves corresponding to different units under different operating conditions are usually different, determining the unit to be pressure tested first, and then determining the isolation valves that need to be opened in the DVN system based on the determined unit and its operating conditions, in order to determine the fans to be put into operation in the DVN system, helps to improve the accuracy of the determined fans to be put into operation.

[0047] In some embodiments, the wind turbines for which the DVN system is put into operation include: B1. Based on the number of fans in the DVN system, the number of fans required for the normal operation of the containment, and the rate and adsorption requirements for the depressurization treatment of the containment, determine the number and type of fans to be put into operation in the DVN system.

[0048] B2. Based on the number and type of wind turbines put into operation in the aforementioned DVN system, identify the wind turbines put into operation in the aforementioned DVN system from among the wind turbines owned by the aforementioned DVN system.

[0049] The types of fans include: supply fans, exhaust fans, and iodine exhaust fans. Supply fans are used to deliver clean air into a designated space, exhaust fans are used to extract air from a designated space and discharge it outdoors, and iodine exhaust fans are used to extract air from a designated space that may contain radioactive iodine and other airborne radionuclides, purify it, and then discharge it outdoors.

[0050] The number of fans in a DVN system is usually greater than the number of fans required for the normal operation of the containment. For example, if the number of fans required for the normal operation of the containment is 2, then the number of fans in the DVN system may be 3.

[0051] The aforementioned rate requirement refers to the value achieved at the depressurization rate. Optionally, this depressurization rate is 400 mbar / h.

[0052] The aforementioned adsorption requirement refers to whether the extracted gas (or air) needs to be filtered before being discharged.

[0053] Optionally, considering the potential radioactive risk during CTT testing, the extracted gas can be filtered through an iodine adsorber before being discharged. In this case, the aforementioned adsorption requirements include adsorbing radioactive iodine in the gas.

[0054] In this embodiment of the application, in order to ensure that the containment can operate normally, the number of fans put into operation in the DVN system should be greater than or equal to the number of fans required for the normal operation of the containment, but cannot exceed the number of fans owned by the DVN system.

[0055] In addition, considering that the number of fans affects the depressurization rate (for example, given that the system resistance, fan model and parallel operation mode are determined, increasing the number of fans operating in parallel can increase the total exhaust volume, thereby accelerating the depressurization rate), the number of exhaust fans put into operation in the DVN system can be increased or decreased according to the depressurization rate.

[0056] For example, assuming that two supply fans are required for normal containment operation, and the DVN system has three supply fans. Since two supply fans are required for normal containment operation, the determined number of fans in the DVN system includes supply fans, which is greater than or equal to two and less than or equal to three. Alternatively, considering that the main purpose of depressurization is to quickly remove gas (or air) from the containment, it is possible to choose to operate only two supply fans.

[0057] For example, assuming that two exhaust fans are sufficient to meet the rate requirements during depressurization in the DVN system, then the number of fans in the DVN system, including the exhaust fans, is determined to be two.

[0058] For example, assuming that the adsorption requirement includes radioactive iodine in the adsorbed gas, then when the adsorption requirement includes radioactive iodine in the adsorbed gas, the fans put into operation in the determined DVN system include iodine exhaust fans. If the adsorption requirement can be met by having only 1 of these fans, then the number of these iodine exhaust fans is 1.

[0059] In this embodiment, after determining the number and type of fans to be put into operation in the DVN system, a corresponding number and type of fans are selected from the fans owned by the DVN system as the fans to be put into operation. For example, if the number of exhaust fans is determined to be 2, then the exhaust fans corresponding to the units undergoing CTT testing can be determined as the exhaust fans to be put into operation, and the exhaust fans corresponding to the nuclear auxiliary plant can be determined as the exhaust fans to be put into operation. Since the type and number of fans to be put into operation in the DVN system are determined based on the number of fans owned by the DVN system, the number of fans required for normal operation of the containment, and the rate requirements and adsorption requirements for the aforementioned depressurization treatment of the containment, and since each factor involved in the determination affects the type and number of fans that can be put into operation, the type and number of fans to be put into operation determined by the above method are more accurate.

[0060] To more clearly describe the types and quantities of wind turbines that have been identified and put into operation, Table 1 is used as an example below.

[0061] Table 1:

[0062] Wherein, "C" represents "closed", "O" represents "open", and "Sb" represents the valve opening of the control valve corresponding to operating condition "b" to obtain the target flow rate. Operating condition "b" has the corresponding valve opening, fan type, and quantity, which are not specified here.

[0063] Table 1 shows the relevant information about the blowers that can be put into operation in the DVN system capable of ventilating two units. Assume that operating condition f1 corresponds to Unit 1 and operating condition 2 corresponds to Unit 2. "DVN011VAR" indicates the control valve for the reactor building supply air; "DVN042VAR" indicates the control valve for the Unit 1 exhaust air; "DVN043VAR" indicates the control valve for the Unit 2 exhaust air; "DVN044VAR" indicates the control valve for the nuclear auxiliary building exhaust air; "DVN045VAI" and "DVN046VAI" represent parallel switching valves belonging to the radioactive iodine exhaust system of Unit 1. During normal operation, one valve remains open while the other is closed. When switching iodine exhaust fans or corresponding pipelines is required, the exhaust channel is quickly switched by closing the currently operating valve and opening the standby valve; "DVN047VAI" and "DVN048VAI" represent parallel switching valves belonging to the radioactive iodine exhaust system of Unit 2.

[0064] As shown in Table 1, during the depressurization process, the number of blowers, exhaust fans, and iodine exhaust fans put into operation is 2.

[0065] When depressurizing Unit 1 during the CTT test: This indicates that the reactor building ventilation control valve "DVN011VAR" is closed because the reactor building is shut down; the exhaust ventilation control valve "DVN042VAR" controlling the exhaust ventilation of Unit 1 is open to the value Sb; the exhaust ventilation control valve "DVN043VAR" controlling the exhaust ventilation of Unit 2 has an arbitrary opening, meaning it can be either open or closed; and the exhaust ventilation channel valve "DVN044VAR" controlling the exhaust ventilation of the nuclear auxiliary building... The opening degree is Sb; the parallel switching valves of the radioactive iodine exhaust system belonging to Unit 1, "DVN045VAI" is closed and "DVN046VAI" is open. Of course, it can also be adjusted so that "DVN045VAI" is open and "DVN046VAI" is closed, which is not limited here; it indicates that the opening degrees of the parallel switching valves "DVN047VAI" and "DVN048VAI" belonging to the radioactive iodine exhaust system belonging to Unit 2 are both closed, because the current CTT test is for Unit 1.

[0066] When depressurizing Unit 2 for CTT testing, the valve opening can be obtained from Table 1, and will not be repeated here.

[0067] In the above description, the containment gas enters and exits through the EBA system into the DVN system. Considering that the exhaust duct of the DVN system typically has a maximum operating pressure, in order to ensure that the pressure in the DVN system's exhaust duct is within this maximum operating pressure during the CTT test, a pressure reducing valve is installed between the EBA system and the DVN system. The pressure set by this pressure reducing valve should be equal to or less than the maximum operating pressure corresponding to the exhaust duct. For example, assuming the maximum operating pressure of the exhaust duct is 2450 Pa (relative to atmospheric pressure), the pressure set by the pressure reducing valve can be equal to 2450 Pa. That is, in some embodiments, before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system DVN as described in S12 above, the following is also included: A pressure reducing valve is installed between the EBA system and the DVN system.

[0068] The pressure reducing valve is used to "stablely" reduce the upstream high pressure to the required low pressure downstream and maintain a constant outlet pressure.

[0069] Optionally, the aforementioned pressure reducing valve can be a movable pressure reducing valve. When the pressure reducing valve is a movable pressure reducing valve, the user can freely set and readjust the outlet pressure at any time within the allowable range of the movable pressure reducing valve, thereby improving the user's operational flexibility.

[0070] In some embodiments, to ensure that the pressure in the exhaust duct of the DVN system is within the maximum operating pressure, a pressure relief valve can also be installed. That is, before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN in S12, the method further includes: A pressure relief valve is installed between the aforementioned pressure reducing valve and the aforementioned DVN system.

[0071] The pressure relief valve is used to open instantaneously when the pressure exceeds the set value, so as to discharge the excess medium to the atmosphere or return it to the tank, thereby preventing the system from being overpressurized.

[0072] In this embodiment, the pressure set by the pressure relief valve is less than or equal to the maximum working pressure of the exhaust duct of the DVN system.

[0073] Alternatively, both a pressure reducing valve and a pressure relief valve can be installed. In this case, the pressure relief valve is installed after the pressure reducing valve. This way, even if the pressure reducing valve fails, the pressure of the gas entering the exhaust duct of the DVN system can be reduced through the pressure relief valve, thereby further improving the safety of the exhaust duct.

[0074] In some embodiments, to more intuitively view the pressure generated by the gas after passing through the pressure reducing valve, a flange with pressure measuring function can be installed. That is, a tee is installed after the aforementioned pressure reducing valve, and before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the following is also included: A pressure relief valve is connected to one outlet of the aforementioned pressure reducing valve, and a flange with pressure testing function is connected to the other outlet of the aforementioned pressure reducing valve.

[0075] Among them, a flange with pressure measurement function refers to a special flange that integrates a pressure measurement interface (or sensing element) directly on the flange body. In the embodiments of this application, a corresponding pressure gauge will also be installed when installing a flange with pressure measurement function, and the pressure generated by the gas after passing through the pressure reducing valve can be viewed through the pressure gauge.

[0076] Optionally, the aforementioned flange with pressure testing function is a flange with a removable blind flange. This flange with a removable blind flange can withstand system pressure and can be removed at any time without damaging the pipeline, thus greatly improving the convenience of installation.

[0077] In this embodiment, since a pressure relief valve and a flange with pressure testing function are connected after the pressure reducing valve, even if the pressure reducing valve fails, the pressure of the gas entering the exhaust duct of the DVN system can be reduced through the pressure relief valve, thereby further improving the safety of the exhaust duct. Furthermore, since the pressure of the gas after the pressure reducing valve can be viewed through a pressure gauge on the flange with pressure testing function, the convenience of monitoring is improved.

[0078] Optionally, the pipe used to connect the pressure reducing valve, EBA system, and DVN system is a flexible metal hose. Since flexible metal hoses, in addition to their high rigidity, also possess advantages such as high pressure resistance, corrosion resistance, and aging resistance, using a flexible metal hose to connect the pressure reducing valve, EBA system, and DVN system in this embodiment of the application is beneficial for improving safety during the CTT test.

[0079] To more clearly describe the devices installed between the EBA system and the DVN system, the following section combines... Figure 2 Describe it.

[0080] Figure 2 A schematic diagram of the connection between an EBA system and a DVN system is shown, in which the three devices within the boxes are newly added. It should be noted that... Figure 2 This is a simplified diagram. In practice, other components may be included, but they will not be described in detail here.

[0081] exist Figure 2In the process, after the gas comes out of the EBA system, it first passes through a movable pressure reducing valve. One end of the movable pressure reducing valve is connected to a flange with a removable blind plate that has a pressure measuring function, the other end is connected to a pressure relief valve, and the third end is connected to the exhaust duct of the DVN system. The metal flexible hose is used to connect to the exhaust duct of the DVN system.

[0082] In the above description, shortening the CTT test duration is achieved by increasing the depressurization rate, considering that the CTT test includes both depressurization and pressurization. When a single penetrating element is used for pressurization, the pressurization rate is low, with a maximum pressurization rate of only 400 mbar / h, corresponding to a pressurization flow rate of only 19760 m³ / h. To increase the pressurization rate, at least two penetrating elements can be used for simultaneous pressurization. That is, in some embodiments, the above-mentioned containment pressure test control method further includes: Gas is introduced into the containment vessel through at least two penetrations.

[0083] Specifically, gas can be injected into the containment through at least two penetrations using an air compressor, booster compressor, or high-pressure gas cylinder. Increasing the number of penetrations helps to improve the pressurization rate.

[0084] In some embodiments, the above-mentioned filling of the containment chamber with gas through at least two penetrations includes: Gas is introduced into the containment through at least two penetrations via an air compressor, a pressurization pipe connecting the air compressor and each of the penetrations and having a regulating valve, and the regulating valve is used to regulate the flow rate of the gas flowing into the penetrations.

[0085] The air compressor can be a temporarily installed air compressor (i.e., a temporary air compressor). Optionally, its working pressure can be set to 1 MPa (abs, where "abs" represents absolute pressure), and the charging pressure can be 0.9 MPa (abs) to allow gas flow by maintaining a pressure difference. Optionally, the operating temperature of the air compressor can be set to 5℃~30℃.

[0086] The regulating valve is used to adjust the charging flow rate, that is, to adjust the flow rate through each penetrating component to reach a preset flow rate threshold. For example, it can make the total charging flow rate of all penetrating components jump to 39520 m3 / h, which corresponds to a charging rate of 800 mbar / h (much greater than 400 mbar / h). For instance, assuming that the penetrating components are ETY226TW and EPP223TW, the charging flow rate through ETY226TW can be adjusted to 15673 m3 / h, and the charging flow rate through EPP223TW can be adjusted to 26225 m3 / h.

[0087] In this embodiment, a temporary pipeline can be used as a pressurization pipeline to connect the temporary air compressor and each penetrating component. The temporary air compressor is then started, and the pressurization flow rate through each penetrating component is adjusted via a regulating valve on the pressurization pipeline, ensuring that the total flow rate through each penetrating component is greater than or equal to a preset flow rate threshold. Specifically, when the total flow rate through each penetrating component is greater than or equal to the preset flow rate threshold, the corresponding pressurization rate is greater than 400 mbar / h. Since the pressurization pipeline has a regulating valve to adjust the flow rate of gas flowing into the penetrating components, it facilitates convenient adjustment of the gas flow rate into the penetrating components.

[0088] In some embodiments, considering that in practical situations, to prevent the penetrations from losing their design function or causing safety risks due to excessive flow under any operating condition, it is necessary to limit the maximum flow rate of the penetrations. Therefore, before adjusting the flow rate of the gas flowing into the penetrations through the regulating valves, it is necessary to determine the maximum flow rate of the gas corresponding to the penetrations. That is, before the gas is introduced into the containment through at least two penetrations via the pressurization pipes connected to the air compressor and each of the penetrations and equipped with regulating valves, the following steps are also included: Based on the outer diameter, wall thickness, flow velocity, working pressure, and working temperature of the aforementioned penetrating component, calculate the maximum flow rate of gas flowing into the aforementioned penetrating component.

[0089] Specifically, considering that the structure, working pressure, and working temperature of the penetrating component all affect the flow rate of the gas flowing into the penetrating component, the maximum flow rate of the gas flowing into the penetrating component can be calculated based on the outer diameter, wall thickness, flow velocity inside the pipe, working pressure, and working temperature of the penetrating component.

[0090] Optionally, the maximum flow rate of gas flowing into the penetration member can be calculated according to the following formula. : ; .

[0091] in, This indicates the volumetric flow rate under operating conditions, and the unit is... ; This indicates the flow velocity inside the pipe, and the unit is m / s; This indicates the inner diameter of the pipe, in mm. This represents the volumetric flow rate in the free state, i.e., the maximum flow rate, and the unit is [unit missing]. P represents the working pressure, in MPa (abs); t represents the working temperature, in °C.

[0092] Optionally, the working pressure is set at a charging pressure of 0.9 MPa (abs), and the working temperature is conservatively set at 30°C. Considering economic efficiency and stability, the flow velocity within the pipe can be set to 25 m / s (the flow velocity range within the pipe is 10 m / s to 25 m / s). Assuming the ETY226TW through-hole has an outer diameter of 168.3 mm and a wall thickness of 4.37 mm, and the EPP223TW through-hole has an outer diameter of 219.1 mm and a wall thickness of 6.35 mm, the charging flow rate of the ETY226TW can be adjusted to 15673 m³ / h, and the charging flow rate of the EPP223TW can be adjusted to 26225 m³ / h. Simultaneously, after charging, the total charging flow rate jumps to 39520 m³ / h, corresponding to a charging rate of 800 mbar / h.

[0093] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0094] Corresponding to the containment pressure test control method described in the above embodiments, Figure 3 A structural block diagram of a containment pressure test control device provided in an embodiment of this application is shown. For ease of explanation, only the parts related to the embodiment of this application are shown.

[0095] Reference Figure 3 The pressure test control device 3 of the containment includes: a test command receiving module 31 and a depressurization processing module 32. Wherein: The test command receiving module 31 is used to receive test commands for performing a pressure test on the containment vessel.

[0096] The depressurization module 32 is used to control the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system DVN if the above test instruction is an instruction to depressurize the above containment, so as to guide the gas in the above containment through the containment ventilation system EBA into the above DVN system for discharge.

[0097] In this embodiment, upon receiving a test command for a containment pressure test (CTT test), if it is determined that the test command is for depressurizing the containment, the corresponding regulating valve is controlled according to the pre-determined opening of the regulating valve of the nuclear auxiliary building ventilation system (DVN system) to guide the containment gas through the containment ventilation system (EBA system) into the DVN system for discharge. Since the depressurization process for the CTT test is performed using both the EBA and DVN systems, and the DVN system's iodine exhaust design flow rate is 32400 m³ / h, it can meet the requirement of increasing the depressurization rate to 400 mbar / h (corresponding to a depressurization flow rate of 19760 m³ / h). That is, using both the EBA and DVN systems during the CTT test depressurization process can significantly increase the depressurization rate, thereby shortening the time required for the CTT test and improving the unit's operating efficiency.

[0098] Optionally, the containment pressure test control device 3 provided in this embodiment further includes: The fan determination module is used to determine the fans to be put into operation in the DVN system before controlling the corresponding regulating valves according to the pre-determined opening degree of the regulating valves of the nuclear auxiliary plant ventilation system DVN.

[0099] The valve opening determination module is used to determine the opening of the regulating valve of the DVN system based on the determined fan.

[0100] Optionally, the DVN system described above is capable of ventilating at least two units, and the fan determination module includes: The unit for determining the test unit is used to determine the unit to be subjected to the above-mentioned pressure test.

[0101] The first unit for determining the commissioned fans is used to determine the isolation valves that need to be opened in the DVN system based on the determined units. When each isolation valve that needs to be opened is opened, the fans that allow the gas to be discharged for the pressure test to flow in are the fans that are commissioned in the DVN system.

[0102] Optionally, the aforementioned wind turbine determination module includes: The fan type and quantity determination unit is used to determine the number and type of fans to be put into operation in the DVN system based on the number of fans owned by the DVN system, the number of fans required for the normal operation of the containment, and the rate and adsorption requirements for the depressurization treatment of the containment.

[0103] The second wind turbine determination unit is used to determine the wind turbines put into operation in the DVN system from among the wind turbines owned by the DVN system, based on the number and type of wind turbines put into operation in the DVN system.

[0104] Optionally, the containment pressure test control device 3 provided in this embodiment further includes: The pressure reducing valve installation module is used to install a pressure reducing valve between the EBA system and the DVN system before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN.

[0105] Optionally, the containment pressure test control device 3 provided in this embodiment further includes: A pressure relief valve is installed between the aforementioned pressure reducing valve and the aforementioned DVN system.

[0106] Optionally, the containment pressure test control device 3 provided in this embodiment further includes: The pressure reducing valve, the pressure relief valve, and the flange are provided. One outlet of the pressure reducing valve is connected to the pressure relief valve, and the other outlet is connected to the flange with pressure testing function.

[0107] Optionally, the pressure test further includes pressurizing the containment vessel. The containment vessel pressure test control device 3 provided in this embodiment further includes: A parallel inflation module is used to inflate the containment vessel with gas through at least two penetrations.

[0108] Optionally, the above-mentioned parallel inflation module is specifically used for: Gas is introduced into the containment through at least two penetrations via an air compressor, a pressurization pipe connecting the air compressor and each of the penetrations and having a regulating valve, and the regulating valve is used to regulate the flow rate of the gas flowing into the penetrations.

[0109] Optionally, the containment pressure test control device 3 provided in this embodiment further includes: The maximum flow rate determination module for gas flowing into the penetrations is used to calculate the maximum flow rate of gas flowing into the penetrations based on the outer diameter, wall thickness, flow velocity in the pipe, operating pressure, and operating temperature of the penetrations before the gas is filled into the containment through at least two penetrations via the pressurization pipes that are connected to the air compressor and each of the penetrations and have regulating valves.

[0110] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0111] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 4 As shown, the electronic device 4 of this embodiment includes: at least one processor 40 ( Figure 4 The diagram shows only one processor, a memory 41, and a computer program 42 stored in the memory 41 and executable on the at least one processor 40, which, when executing the computer program 42, performs the steps in any of the above method embodiments.

[0112] The electronic device 4 can be a desktop computer, laptop, handheld computer, cloud server, or other computing device. This electronic device may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of electronic device 4 and does not constitute a limitation on electronic device 4. It may include more or fewer components than shown, or combine certain components, or different components. For example, it may also include input / output devices, network access devices, etc.

[0113] The processor 40 may be a Central Processing Unit (CPU), or it may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0114] In some embodiments, the memory 41 may be an internal storage unit of the electronic device 4, such as a hard disk or memory of the electronic device 4. In other embodiments, the memory 41 may be an external storage device of the electronic device 4, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the electronic device 4. Furthermore, the memory 41 may include both internal and external storage units of the electronic device 4. The memory 41 is used to store the operating system, applications, bootloader, data, and other programs, such as the program code of the computer program. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0115] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0116] This application also provides a network device, which includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, wherein the processor executes the computer program to implement the steps in any of the above method embodiments.

[0117] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, can implement the steps in the above-described method embodiments.

[0118] This application provides a computer program product that, when run on an electronic device, enables the electronic device to implement the steps described in the various method embodiments above.

[0119] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a photographic device / electronic device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0120] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0121] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0122] In the embodiments provided in this application, it should be understood that the disclosed apparatus / network devices and methods can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0123] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0124] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for controlling the pressure test of a containment vessel, characterized in that, include: Receive test instructions to perform a pressure test on the containment vessel; If the test command is to depressurize the containment, the corresponding regulating valve is controlled according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system (DVN) to guide the gas in the containment through the containment ventilation system (EBA) into the DVN system for discharge.

2. The containment pressure test control method as described in claim 1, characterized in that, Before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the method further includes: Determine the wind turbines to be put into operation by the DVN system; The opening degree of the regulating valve of the DVN system is determined based on the determined fan.

3. The containment pressure test control method as described in claim 2, characterized in that, The DVN system is capable of ventilating at least two units, and determining the fans to be put into operation in the DVN system includes: Determine the unit to be subjected to the pressure test; Based on the determined unit, the isolation valves that need to be opened in the DVN system are determined. When each of the isolation valves that need to be opened is opened, the fan that allows the gas to be discharged for the pressure test to flow in is the fan that puts the DVN system into operation.

4. The method for controlling the pressure test of the containment vessel as described in claim 2 or 3, characterized in that, The determination of the wind turbines to be put into operation by the DVN system includes: The number and type of fans put into operation in the DVN system are determined based on the number of fans in the DVN system, the number of fans required for normal operation of the containment, and the rate and adsorption requirements when depressurizing the containment. Based on the number and type of wind turbines in operation of the DVN system, determine the wind turbines in operation of the DVN system from among the wind turbines owned by the DVN system.

5. The containment pressure test control method as described in claim 4, characterized in that, Before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the method further includes: A pressure reducing valve is installed between the EBA system and the DVN system.

6. The method for controlling the pressure test of a containment vessel as described in claim 5, characterized in that, Before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the method further includes: A pressure relief valve is installed between the pressure reducing valve and the DVN system.

7. The containment pressure test control method as described in claim 5, characterized in that, A tee is installed after the pressure reducing valve. Before controlling the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary plant ventilation system DVN, the system further includes: A pressure relief valve is connected to one outlet of the pressure reducing valve. A flange with pressure testing function is connected to the other outlet of the pressure reducing valve.

8. The method for controlling the pressure test of the containment vessel as described in claim 4, characterized in that, The pressure test also includes pressurizing the containment vessel, and the pressure test control method for the containment vessel further includes: Gas is introduced into the containment through at least two penetrations.

9. The containment pressure test control method as described in claim 8, characterized in that, The process of filling the containment with gas through at least two penetrations includes: Gas is introduced into the containment through at least two penetrations via an air compressor, a pressurization pipe connecting the air compressor and each of the penetrations and having a regulating valve, the regulating valve being used to regulate the flow rate of the gas flowing into the penetrations.

10. The containment pressure test control method as described in claim 9, characterized in that, Before the gas is introduced into the containment through at least two penetrations via a pressurization pipe connected to the air compressor and each of the penetrations and having a regulating valve, the method further includes: Calculate the maximum flow rate of gas flowing into the penetrator based on the outer diameter, wall thickness, flow velocity inside the pipe, working pressure, and working temperature.

11. A containment pressure test control device, characterized in that, include: The test command receiving module is used to receive test commands for performing a pressure test on the containment vessel; The depressurization module is used to control the corresponding regulating valve according to the predetermined opening degree of the regulating valve of the nuclear auxiliary building ventilation system (DVN) if the test command is to depressurize the containment, so as to guide the gas in the containment through the containment ventilation system (EBA) into the DVN system for discharge.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method as described in any one of claims 1 to 10.

13. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 10.

14. A computer program product, characterized in that, Includes a computer program, which, when run, causes the method as described in any one of claims 1 to 10 to be performed.

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