Method for measuring inertia time of water supply and oxygenation system of nuclear power unit and related device

Abstract

The invention discloses a nuclear power unit water supply oxygenation system inertia time measuring method and a related device. The method comprises the following steps that the theoretical oxygenation concentration M0 of a unit in the current state is calculated according to the oxygenation amount of an oxygenation device and the flow measured by a flow meter, and the downstream dissolved oxygen concentration actually measured by an online dissolved oxygen meter is N0; (2) starting from the moment T1, adjusting the opening degree of an oxygen adding control valve, increasing the theoretical oxygen adding concentration M1 to be twice of the initial set oxygen adding concentration M0, maintaining the valve position of the oxygen adding control valve to be stable, and recording the current moment T2; 3) after the dissolved oxygen recorded by the online dissolved oxygen meter rises and is stable, recording the time T3 when the dissolved oxygen starts to rise, the time T4 when the dissolved oxygen rises to N1, the time T5 when the dissolved oxygen rises to N2 and the time T6 when the dissolved oxygen is stabilized at a final stable value N3, and N1 = 120% * N0; n2 = 90% * N3; and 4) calculating the inertia time delta Ts of the water supply and oxygenation system. The method and the related device can be used for measuring the inertia time of the water supply and oxygenation system of the nuclear power unit, and the accuracy is high.

Description

Technical Field

[0001] This invention belongs to the field of oxygenation of feedwater in nuclear power units, and relates to a method and related apparatus for measuring the inertial time of a feedwater oxygenation system in a nuclear power unit. Background Technology

[0002] Traditional nuclear power unit feedwater systems employ AVT(R) water chemistry with hydrazine deoxygenation to reduce oxidation and corrosion of the unit's metallic materials. However, for high-parameter nuclear power units such as high-temperature gas-cooled reactors and sodium-cooled fast reactors, flow-accelerated corrosion (FAC) of the feedwater can easily lead to blockage of the steam generator throttling components and deposition on heat transfer tubes. Oxygenation of the feedwater not only forms a dense oxide film on the feedwater pipes and evaporator inner walls, slowing down the rate of flow-accelerated corrosion in the feedwater and condensate systems and effectively reducing the rate of evaporator corrosion and scaling, but also eliminates Fe3O4 deposition at the throttling valves of the evaporator heat transfer tubes, reduces the rate of pressure differential rise on the DC side of the nuclear power unit's evaporator, and eliminates inter-tube temperature deviations caused by scaling at the throttling valves. Furthermore, oxygenation of the feedwater can extend the fine treatment cycle, offering significant economic advantages.

[0003] Common oxygenation methods for feedwater include pure oxygen, compressed air, and oxygen-enriched water. Currently, feedwater oxygenation control typically employs feedforward control proportional to the feedwater flow rate, using the measured dissolved oxygen concentration signal as feedback. Whether using a single-point oxygenation point in the condensate or a two-point oxygenation point with the main feedwater, the dissolved oxygen meter is located downstream of the oxygenation pipeline. The system has a large volume and inertia; any fluctuation in oxygen levels at the oxygenation point can result in a time lag of several minutes or even tens of minutes between the meter reading and the actual oxygen level. This poses a significant challenge to the control system's accuracy. Inappropriate or inaccurate inertial time delay settings can easily lead to excessive or insufficient oxygenation, potentially causing significant periodic fluctuations in dissolved oxygen levels, which is detrimental to the power plant's water chemistry control. Furthermore, it cannot adapt to unit load fluctuations and changes in water quality parameters, exhibiting insufficient dynamic response capabilities. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and related device for measuring the inertial time of a nuclear power unit feedwater oxygenation system. This method and related device can measure the inertial time of a nuclear power unit feedwater oxygenation system with high accuracy.

[0005] To achieve the above objectives, this invention discloses a method for determining the inertial time of a nuclear power unit feedwater oxygenation system, comprising the following steps: 1) When the unit is in oxygenation operation mode, the unit is running stably at 100% full power and the unit power remains stable, and the flow rate of the main feedwater system being measured remains stable, the theoretical oxygenation concentration M0 of the unit under the current state is calculated based on the oxygenation amount of the oxygenation device and the flow rate measured by the flow meter. The downstream dissolved oxygen concentration actually measured by the online dissolved oxygen meter is N0. 2) Starting from time T1, adjust the opening of the oxygenation control valve to increase the theoretical oxygenation concentration M1 to twice the initial oxygenation concentration M0, and maintain the valve position of the oxygenation control valve stable. Record the current time T2. 3) After the dissolved oxygen recorded by the online dissolved oxygen meter rises and stabilizes, record the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3, where N1 = 120% * N0; N2 = 90% * N3. 4) Calculate the inertial time ΔTs of the water oxygenation system based on the time T3 when the dissolved oxygen begins to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3.

[0006] Furthermore, the water supply oxygenation system includes an oxygenation device, an oxygenation control valve, an oxygenation point, a flow meter, a water supply pipeline, and an online dissolved oxygen meter. The outlet of the oxygenation device is connected to the inlet of the oxygenation point via the oxygenation control valve, and the outlet of the oxygenation point is connected to the water supply pipeline. The water supply pipeline is equipped with a flow meter and an online dissolved oxygen meter.

[0007] Furthermore, M1 = 2 * M0.

[0008] Furthermore, the specific operation of step 4) is as follows: 41) Record the initial inertial time of ascent ΔT1=T4-T1, and the stable inertial time of the system ΔT2=T5-T2.

[0009] 42) Compare ΔT1 and ΔT2, and take the smaller value of the two as the inertial time ΔT for oxygenation of the system.

[0010] 43) The inertial time ΔT is corrected according to the main feedwater flow rate of the unit to obtain the inertial time ΔTs of the feedwater oxygenation system.

[0011] Furthermore, the inertial time ΔTs of the water oxygenation system is calculated as ΔTs = K * ΔT = ΔT * Q / Q0, where K is a correction coefficient, K = Q / Q0, and Q0 is the flow rate corresponding to full power.

[0012] This invention discloses an inertial time measurement system for a nuclear power unit feedwater oxygenation system, comprising: The first calculation module is used to calculate the theoretical oxygen concentration M0 of the unit under the current state when the unit is in the oxygenation operation mode, the unit is running stably at 100% full power and the unit power remains stable, and the flow rate of the main feedwater system being measured remains stable. The actual downstream dissolved oxygen concentration measured by the online dissolved oxygen meter is N0. The first recording module is used to adjust the opening of the oxygenation control valve starting from time T1, increase the theoretical oxygenation concentration M1 to twice the initial set oxygenation concentration M0, maintain the valve position of the oxygenation control valve stable, and record the current time T2. The second recording module is used to record the time T3 when the dissolved oxygen level starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3 after the dissolved oxygen level recorded in the online dissolved oxygen table 6 rises and stabilizes. Wherein, N1=120%*N0; N2=90%*N3. The second calculation module is used to calculate the inertial time ΔTs of the water oxygenation system based on the time T3 when the dissolved oxygen begins to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3.

[0013] Furthermore, the second computing module includes: The recording unit is used to record the initial ascent inertia time ΔT1=T4-T1 and the stable inertia time ΔT2=T5-T2.

[0014] The comparison unit is used to compare ΔT1 and ΔT2, and take the smaller value of the two as the inertial time ΔT for oxygenation of the system.

[0015] The correction unit is used to correct the inertia time ΔT according to the main feedwater flow rate of the unit to obtain the inertia time ΔTs of the feedwater oxygenation system.

[0016] Furthermore, the inertial time ΔTs of the water oxygenation system is calculated as ΔTs = K * ΔT = ΔT * Q / Q0, where K is a correction coefficient, K = Q / Q0, and Q0 is the flow rate corresponding to full power.

[0017] This invention discloses a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the inertial time measurement method for the feedwater oxygenation system of a nuclear power unit.

[0018] This invention discloses a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the inertial time measurement method for the feedwater oxygenation system of a nuclear power unit.

[0019] The present invention has the following beneficial effects: In specific operation, the inertial time measurement method and related device for the feedwater oxygenation system of nuclear power units described in this invention record the time T3 when the dissolved oxygen level starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3 after the dissolved oxygen level recorded by the online dissolved oxygen meter rises and stabilizes. This adapts to unit load fluctuations and changes in water quality parameters, has a dynamic response capability, and calculates the inertial time ΔTs of the feedwater oxygenation system based on this, with high accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart of the method of the present invention; Figure 2 A schematic diagram of a water supply oxygenation system; Figure 3 A schematic diagram of the response time of a water oxygenation system.

[0022] Among them, 1 is the oxygenation device, 2 is the oxygenation control valve, 3 is the oxygenation point, 4 is the water supply pipeline, 5 is the flow meter, and 6 is the online dissolved oxygen meter. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be understood that the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this invention generally indicates that the preceding and following objects have an "or" relationship.

[0027] It should be understood that although terms such as first, second, third, etc., may be used in the embodiments of the present invention to describe the preset range, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from one another. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0028] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0031] Example 1 refer to Figure 1 , Figure 2 and Figure 3 The present invention discloses a method for determining the inertial time of a nuclear power unit feedwater oxygenation system. The feedwater oxygenation system includes an oxygenation device 1, an oxygenation control valve 2, an oxygenation point 3, a flow meter 5, a feedwater pipeline 4, and an online dissolved oxygen meter 6. The outlet of the oxygenation device 1 is connected to the inlet of the oxygenation point 3 via the oxygenation control valve 2. The outlet of the oxygenation point 3 is connected to the feedwater pipeline 4. The feedwater pipeline 4 is equipped with a flow meter 5 and an online dissolved oxygen meter 6. The method specifically includes the following steps: 1) Confirm the initial state; After the oxygenation conversion of the main feedwater system is completed, the unit is in oxygenation operation (OT) mode. The unit operates stably at 100% full power for more than 4 hours and the unit power remains stable. The flow rate of the measured main feedwater system remains stable. The theoretical oxygenation concentration M0 of the unit under the current state is calculated based on the oxygenation amount of oxygenation device 1 and the flow rate measured by flow meter 5 (flow rate Q0 corresponding to 100% full power). The downstream dissolved oxygen concentration actually measured by online dissolved oxygen meter 6 is N0. When N0 fluctuates slightly, N0 is taken as the average value of the data in the previous hour.

[0032] 2) Adjust the oxygenation rate; Starting from time T1, adjust the opening of oxygenation control valve 2 to increase the theoretical oxygenation concentration M1 to twice the initial oxygenation concentration M0, and maintain the valve position of oxygenation control valve 2 stably. Record the current time T2, where M1 = 2 * M0.

[0033] 3) Record the time; After the dissolved oxygen recorded in the online dissolved oxygen meter 66 rises and stabilizes, record the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3, where N1 = 120% * N0; N2 = 90% * N3.

[0034] 4) Calculate the inertia time; Record the initial inertial time of ascent as ΔT1 = T4 - T1, and the steady-state inertial time of the system as ΔT2 = T5 - T2.

[0035] 5) Select the inertia time; Compare ΔT1 and ΔT2, and take the smaller value as the inertial time ΔT for oxygenation of the system.

[0036] 6) Correct inertia time; The inertial time ΔT is corrected according to the main feedwater flow rate of the unit, where the correction coefficient K = Q / Q0, Q is the real-time flow rate measured by flow meter 5, and Q0 is the flow rate corresponding to full power. The corrected inertial time ΔTs = K * ΔT = ΔT * Q / Q0.

[0037] 7) Repeat steps 2) to 6) to measure the inertial time of condensate, hydrophobic, and other systems; 8) For different oxygenation points 3 (main feedwater, condensate, drainage, etc.), set the corresponding inertia time and correction coefficient in the control system to improve the accuracy of the control system.

[0038] It should be noted that this invention is applicable to water and steam systems in power plants that require oxygenation, including main feedwater (high-pressure feedwater system), condensate (low-pressure feedwater system), and drainage systems. Each measurement covers the inertial time measurement of the system pipeline between a specific oxygenation point 3 and a downstream dissolved oxygen measuring point (online dissolved oxygen meter 6).

[0039] Example 2 The inertial time measurement system for the feedwater oxygenation system of a nuclear power unit according to the present invention includes: The first calculation module is used to calculate the theoretical oxygen concentration M0 of the unit under the current state when the unit is in the oxygenation operation mode, the unit is running stably at 100% full power and the unit power remains stable, and the flow rate of the measured main water supply system remains stable. The module calculates the theoretical oxygenation concentration M0 of the unit under the current state based on the oxygenation amount of the oxygenation device 1 and the flow rate measured by the flow meter 5. The actual downstream dissolved oxygen concentration measured by the online dissolved oxygen meter 6 is N0. The first recording module is used to adjust the opening of the oxygenation control valve 2 starting from time T1, increase the theoretical oxygenation concentration M1 to twice the initial set oxygenation concentration M0, maintain the valve position of the oxygenation control valve 2 stably, and record the current time T2. The second recording module is used to record the time T3 when the dissolved oxygen level starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3 after the dissolved oxygen level recorded in the online dissolved oxygen table 6 rises and stabilizes. Wherein, N1=120%*N0; N2=90%*N3. The second calculation module is used to calculate the inertial time ΔTs of the water oxygenation system based on the time T3 when the dissolved oxygen begins to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3.

[0040] Furthermore, the second computing module includes: The recording unit is used to record the initial ascent inertia time ΔT1=T4-T1 and the stable inertia time ΔT2=T5-T2.

[0041] The comparison unit is used to compare ΔT1 and ΔT2, and take the smaller value of the two as the inertial time ΔT for oxygenation of the system.

[0042] The correction unit is used to correct the inertia time ΔT according to the main feedwater flow rate of the unit to obtain the inertia time ΔTs of the feedwater oxygenation system.

[0043] Furthermore, the inertial time ΔTs of the water oxygenation system is calculated as ΔTs = K * ΔT = ΔT * Q / Q0, where K is a correction coefficient, K = Q / Q0, and Q0 is the flow rate corresponding to full power.

[0044] The module division in this embodiment is illustrative and represents only one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional modules in each embodiment of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0045] Example 3 A computer device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of a method for determining the inertial time of a nuclear power unit feedwater oxygenation system. For example, the method includes: 1) When the unit is in oxygenation operation mode, operating stably at 100% full power with stable power output, and the flow rate of the main feedwater system being measured remains stable, calculating the theoretical oxygenation concentration M0 of the unit under the current state based on the oxygenation amount of the oxygenation device 1 and the flow rate measured by the flow meter 5. The actual downstream dissolved oxygen concentration measured by the online dissolved oxygen meter 6 is N0; 2) Starting from time T1, adjusting the oxygenation control valve 2... 1) Adjust the opening degree of the oxygenation control valve 2 to increase the theoretical oxygenation concentration M1 to twice the initial oxygenation concentration M0, and maintain the valve position of the oxygenation control valve 2 stable, and record the current time T2; 2) After the dissolved oxygen recorded by the online dissolved oxygen meter 6 rises and stabilizes, record the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3, where N1 = 120% * N0; N2 = 90% * N3; 3) Calculate the inertial time ΔTs of the water supply oxygenation system based on the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3. The memory may include main memory, such as high-speed random access memory (RAM), or non-volatile memory, such as at least one disk storage device. The processor, network interface, and memory are interconnected via an internal bus, which may be an industry-standard architecture bus, a peripheral component interconnection standard bus, or an extended industry-standard architecture bus. The bus can be categorized as an address bus, data bus, or control bus. The memory stores programs; specifically, the program may include program code, which includes computer operation instructions. The memory may include main memory and non-volatile memory, and provides instructions and data to the processor.

[0046] Example 4 A computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the inertial time determination method for the feedwater oxygenation system of a nuclear power unit, for example including: 1) when the unit is in oxygenation operation mode, the unit is operating stably at 100% full power and the unit power remains stable, and the flow rate of the main feedwater system being measured remains stable, the theoretical oxygenation concentration M0 of the unit under the current state is calculated based on the oxygenation amount of the oxygenation device 1 and the flow rate measured by the flow meter 5, and the downstream dissolved oxygen concentration actually measured by the online dissolved oxygen meter 6 is N0; 2) starting from time T1, the opening degree of the oxygenation control valve 2 is adjusted to adjust the theoretical oxygenation concentration M0 of the unit under the current state. 1) Increase the oxygen concentration M1 to twice the initial set oxygen concentration M0, and maintain the valve position of the oxygenation control valve 2 stable, recording the current time T2; 2) After the dissolved oxygen recorded by the online dissolved oxygen meter 6 rises and stabilizes, record the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3, where N1 = 120% * N0; N2 = 90% * N3; 3) Calculate the inertial time ΔTs of the water supply oxygenation system based on the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3. Specifically, the computer-readable storage medium includes, but is not limited to, volatile memory and / or non-volatile memory. The volatile memory may include random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include read-only memory (ROM), hard disk, flash memory, optical disk, magnetic disk, etc.

[0047] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0048] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0049] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0051] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0052] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0053] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for determining the inertial time of a nuclear power unit feedwater oxygenation system, characterized in that, Includes the following steps: 1) When the unit is in the oxygenation operation mode, the unit is running at 100% full power and the unit power remains stable, and the flow rate of the main water supply system being measured remains stable, the theoretical oxygenation concentration M0 of the unit under the current state is calculated based on the oxygenation amount of the oxygenation device (1) and the flow rate measured by the flow meter (5), and the downstream dissolved oxygen concentration actually measured by the online dissolved oxygen meter (6) is N0. 2) Starting from time T1, adjust the opening of the oxygenation control valve (2) to increase the theoretical oxygenation concentration M1 to twice the initial oxygenation concentration M0, and maintain the valve position of the oxygenation control valve (2) stable, and record the current time T2. 3) After the dissolved oxygen recorded by the online dissolved oxygen meter (6) rises and stabilizes, record the time T3 when the dissolved oxygen starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3, where N1 = 120% * N0; N2 = 90% * N3; 4) Calculate the inertial time ΔTs of the water oxygenation system based on the time T3 when the dissolved oxygen begins to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3.

2. The method for determining the inertial time of a nuclear power unit feedwater oxygenation system according to claim 1, characterized in that, The water supply oxygenation system includes an oxygenation device (1), an oxygenation control valve (2), an oxygenation point (3), a flow meter (5), a water supply pipeline (4), and an online dissolved oxygen meter (6). The outlet of the oxygenation device (1) is connected to the inlet of the oxygenation point (3) via the oxygenation control valve (2), and the outlet of the oxygenation point (3) is connected to the water supply pipeline (4). The water supply pipeline (4) is equipped with a flow meter (5) and an online dissolved oxygen meter (6).

3. The method for determining the inertial time of a nuclear power unit feedwater oxygenation system according to claim 1, characterized in that, M1 = 2 * M0.

4. The method for determining the inertial time of a nuclear power unit feedwater oxygenation system according to claim 1, characterized in that, The specific operation of step 4) is as follows: 41) Record the initial inertial time of ascent ΔT1=T4-T1, and the stable inertial time of the system ΔT2=T5-T2; 42) Compare ΔT1 and ΔT2, and take the smaller value as the inertial time ΔT for oxygenation of the system; 43) The inertial time ΔT is corrected according to the main feedwater flow rate of the unit to obtain the inertial time ΔTs of the feedwater oxygenation system.

5. The method for determining the inertial time of a nuclear power unit feedwater oxygenation system according to claim 4, characterized in that, The inertial time of the water oxygenation system is ΔTs = K * ΔT = ΔT * Q / Q0, where K is a correction coefficient, K = Q / Q0, and Q0 is the flow rate corresponding to full power.

6. An inertial time measurement system for a nuclear power unit feedwater oxygenation system, characterized in that, include: The first calculation module is used to calculate the theoretical oxygen concentration M0 of the unit under the current state when the unit is in the oxygenation operation mode, the unit is running stably at 100% full power and the unit power remains stable, and the flow rate of the main feedwater system being measured remains stable. The module calculates the theoretical oxygen concentration M0 of the unit under the current state based on the oxygenation amount of the oxygenation device (1) and the flow rate measured by the flow meter (5). The downstream dissolved oxygen concentration actually measured by the online dissolved oxygen meter (6) is N0. The first recording module is used to adjust the opening of the oxygenation control valve (2) from time T1, increase the theoretical oxygenation concentration M1 to twice the initial oxygenation concentration M0, maintain the valve position of the oxygenation control valve (2) stable, and record the current time T2. The second recording module is used to record the time T3 when the dissolved oxygen level starts to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3 after the dissolved oxygen level recorded by the online dissolved oxygen table (6) rises and stabilizes. Wherein, N1=120%*N0; N2=90%*N3. The second calculation module is used to calculate the inertial time ΔTs of the water oxygenation system based on the time T3 when the dissolved oxygen begins to rise, the time T4 when it rises to N1, the time T5 when it rises to N2, and the time T6 when it stabilizes at the final stable value N3.

7. The inertial time measurement system for the feedwater oxygenation system of a nuclear power unit according to claim 6, characterized in that, The second calculation module includes: The recording unit is used to record the initial ascent inertia time ΔT1=T4-T1 and the system stabilization inertia time ΔT2=T5-T2; The comparison unit is used to compare ΔT1 and ΔT2, and take the smaller value of the two as the inertial time ΔT for oxygenation of the system. The correction unit is used to correct the inertia time ΔT according to the main feedwater flow rate of the unit to obtain the inertia time ΔTs of the feedwater oxygenation system.

8. The inertial time measurement system for the feedwater oxygenation system of a nuclear power unit according to claim 7, characterized in that, The inertial time of the water oxygenation system is ΔTs = K * ΔT = ΔT * Q / Q0, where K is a correction coefficient, K = Q / Q0, and Q0 is the flow rate corresponding to full power.

9. A computer 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 steps of the inertial time measurement method for the feedwater oxygenation system of a nuclear power unit as described in any one of claims 1-5.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the inertial time determination method for the feedwater oxygenation system of a nuclear power unit as described in any one of claims 1-5.

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