Doppler point detection method, device, system and equipment and storage medium
By obtaining the changing trends of temperature and reaction doubling cycles in real time at the outlet of the core of the pressurized water nuclear reactor, the problem of large Doppler point measurement error in the prior art is solved, and more accurate Doppler point determination is achieved.
Patent Information
- Application Number
- CN202510517327.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2025-07-25
AI Technical Summary
In the prior art, the Doppler point determination method of pressurized water nuclear reactor in the supercritical state is limited by insufficient detection accuracy of the first loop temperature and reaction efficiency, resulting in large errors in the measured Doppler point.
By obtaining the average temperature and reaction doubling cycle in real time at the core outlet of the pressurized water nuclear reactor, determining the Doppler point using the changing trend of the temperature and doubling cycle, data is collected in real time using the temperature detection component and the reactive detection component. The controller drives the reactor to perform positive reactions in a supercritical state, so that the neutron flux continues to grow.
It improves the measurement accuracy of Doppler points, reduces temperature response delay and signal fluctuations, and provides more accurate Doppler point determination.
Smart Images
Figure CN120376208A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of nuclear engineering technology, and particularly relates to a Doppler point detection method, device, system, equipment and storage medium. Background Art
[0002] For the current method of determining the Doppler point of a pressurized water nuclear reactor, during the continuous increase of the neutron flux in the supercritical state of the nuclear reactor, by monitoring the average temperature signal of the primary loop and the reaction efficiency detected by the reactivity detection component, the synchronous inflection point of the increase of the average temperature signal of the primary loop and the decrease of the reaction efficiency signal is used as the Doppler point of the nuclear reactor.
[0003] However, the Doppler point determination method is limited by the detection accuracy of the primary loop temperature detection and the reaction efficiency detection, resulting in a large error in the measured Doppler point. On the one hand, the reactivity detection component measures the real-time reaction efficiency of the nuclear reactor based on the power range signal, but the measured power range signal is near the lower limit of the measurement range, and the signal fluctuation is large, resulting in a large deviation in the measured reaction efficiency. On the other hand, since the temperature detectors on the primary loop are all arranged in the main loop pipeline outside the pressure vessel, which is slightly far from the fuel assembly inside the pressure vessel, the average temperature of the primary loop responds slightly later to the temperature change of the actual fuel assembly, and there is a certain temperature gradient deviation. Moreover, the average temperature signal measured through the primary loop is actually the maximum value of the average temperatures of three loops among them, and the measured average temperature may be caused by the switching due to the maximum average temperature fluctuation between different loops, and cannot reflect the actual temperature change of the fuel assembly.
[0004] Therefore, it is necessary to provide a Doppler point detection method, device, system, equipment and storage medium to improve the above problems. Summary of the Invention
[0005] The purpose of the present disclosure is to provide a Doppler point detection method, device, system, equipment and storage medium to improve the technical problem that the current Doppler point determination method is limited by insufficient test accuracy and has a large error.
[0006] To achieve the above purpose and other related purposes, in a first aspect, the present disclosure provides a method for detecting the Doppler point of a pressurized water nuclear reactor, and the method for detecting the Doppler point includes the following steps:
[0007] Drive the pressurized water nuclear reactor to conduct a positive reaction in a supercritical state to make the neutron flux of the nuclear reaction continuously increase;
[0008] During the increase of the neutron flux, continuously obtain the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor in real time;
[0009] Determine the Doppler point of a pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication cycle with time.
[0010] In an example of the present disclosure, the determining the Doppler point of a pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication cycle with time includes: using the average temperature that increases synchronously with the reaction multiplication cycle as the Doppler point of the pressurized water nuclear reactor.
[0011] In an example of the present disclosure, the determining the Doppler point of a pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication cycle with time includes:
[0012] Based on the change trend of the average temperature at the core outlet with time, obtain the growth change point of the average temperature;
[0013] Based on the change trend of the reaction multiplication cycle with time, determine whether there is a growth change in the reaction multiplication cycle corresponding to the growth change point;
[0014] If so, determine that the average temperature corresponding to the growth change point is the Doppler point of the pressurized water nuclear reactor.
[0015] In an example of the present disclosure, the obtaining the growth change point of the average temperature based on the change trend of the average temperature at the core outlet with time includes:
[0016] Based on the numerical relationship between the average temperature and time, obtain the relationship curve between the average temperature and time;
[0017] Use the slope growth inflection point in the relationship curve between the average temperature and time as the growth change point of the average temperature.
[0018] In an example of the present disclosure, the obtaining the average temperature at the core outlet of a pressurized water nuclear reactor and the reaction multiplication cycle of the pressurized water nuclear reactor in real time during the growth process of the neutron flux includes:
[0019] Obtain the neutron flux collected by the reactivity detection component in real time; the reactivity detection component is arranged outside the pressurized water nuclear reactor;
[0020] During the growth process of the neutron flux, obtain the average temperature collected by the temperature detection component in real time, and obtain the reaction multiplication cycle collected by the reactivity detection component in real time; the temperature detection component is arranged at the core outlet.
[0021] Second aspect, the present disclosure provides a Doppler point detection device for a pressurized water nuclear reactor, and the Doppler point detection device includes a temperature detection component, a reactivity detection component, and a controller.
[0022] Wherein, the temperature detection component is arranged at the core outlet of the pressurized water nuclear reactor and is used to detect the average temperature at the core outlet; the reactivity detection component is arranged outside the pressurized water nuclear reactor and is used to detect the neutron flux and the reaction multiplication period of the pressurized water nuclear reactor; the controller is communicatively connected to the pressurized water nuclear reactor, the temperature detection component, and the reactivity detection component, and the controller is configured to: drive the pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases; during the increase of the neutron flux, obtain in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor; determine the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet over time and the change trend of the reaction multiplication period over time.
[0023] In an example of the present disclosure, the temperature detection component includes a plurality of temperature sensors, and the plurality of temperature sensors are arranged at intervals in a plane at the core outlet.
[0024] In an example of the present disclosure, the reactivity detection component includes a source range detector, an intermediate range detector, and a power range detector. The source range detector, the intermediate range detector, and the power range detector are arranged at intervals and are respectively arranged around the periphery of the pressurized water nuclear reactor.
[0025] Third aspect, the present disclosure provides a Doppler point detection system for a pressurized water nuclear reactor, and the Doppler point detection system includes:
[0026] A startup module for driving the pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases;
[0027] An information acquisition module for obtaining in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor during the increase of the neutron flux;
[0028] A Doppler point determination module for determining the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet over time and the change trend of the reaction multiplication period over time.
[0029] Fourth aspect, the present disclosure provides a computer device, which includes a processor, a memory, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the steps of the method described in any one of the above examples are implemented.
[0030] Fifth aspect, the present disclosure provides a computer-readable storage medium storing a computer program, which when executed by a processor, implements the steps of the method described in any of the above examples.
[0031] The Doppler point detection method provided by the present disclosure determines the Doppler point of nuclear reaction preliminarily based on the average temperature at the core outlet of the nuclear reactor and the nuclear reaction multiplication period, taking the average temperature at the core outlet, which is closer to the fuel assembly and has smaller fluctuations, as the basis, and determines whether the preliminarily determined Doppler point is accurate by using the reaction multiplication period with smaller fluctuations than the efficiency signal, so as to obtain a more accurate Doppler point. Description of the Drawings
[0032] The features and advantages of the present disclosure will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as imposing any limitation on the present disclosure. In the drawings:
[0033] Figure 1 It shows a schematic flow chart of the Doppler point detection method in an embodiment of the present disclosure;
[0034] Figure 2 It shows a schematic structural diagram of a pressurized water nuclear reactor in an embodiment of the present disclosure;
[0035] Figure 3 It shows a schematic layout diagram of the reactivity detection assembly around the pressurized water nuclear reactor in an embodiment of the present disclosure;
[0036] Figure 4 It shows a schematic layout diagram of the temperature detection assembly at the core outlet in an embodiment of the present disclosure;
[0037] Figure 5 It shows a schematic flow chart of step S2 in an embodiment of the present disclosure;
[0038] Figure 6 It shows a schematic flow chart of step S3 in an embodiment of the present disclosure;
[0039] Figure 7 It shows a curve graph of the neutron flux, average temperature and multiplication period measured over time in an embodiment of the present disclosure;
[0040] Figure 8 It shows a structural block diagram of the Doppler point detection system in an embodiment of the present disclosure;
[0041] Figure 9 It shows a structural block diagram of a computer device in an embodiment of the present disclosure.
[0042] Description of Reference Numerals:
[0043] 100, Nuclear reactor; 110, Housing; 120, Core; 121, Pressure vessel; 122, Fuel assembly; 130, Control rod assembly; 200, Temperature detection assembly; 210, Temperature sensor; 300, Reactivity detection assembly; 310, Source range detector; 320, Intermediate range detector; 330, Power range detector;
[0044] 10, Doppler point detection system; 11, Start-up module; 12, Information acquisition module; 13, Doppler point determination module. Specific implementation mode
[0045] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.
[0046] Please refer to Figures 1 to 9 . It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present disclosure schematically. Therefore, only the components related to the present disclosure are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0047] In this specification, the Doppler point refers to the key state point at which the change in fuel temperature significantly affects reactivity through the Doppler effect during the operation of a nuclear reactor, that is, the temperature point when the nuclear reactor changes from positive reactivity to negative reactivity. Specifically, during the operation of a nuclear reactor, as the fuel temperature increases, the 238 U resonance absorption peak in the fuel pellets shows a broadening effect, resulting in an increase in the effective resonance absorption of neutrons, that is, a decrease in the resonance escape probability of neutrons, and then introducing negative reactivity, reducing the overall reactivity of the reactor, also known as the nuclear heating point
[0048] Please see Figures 1 to 6 , in the first aspect, the present disclosure provides a method for detecting the Doppler point of a pressurized water nuclear reactor, which directly detects the change in the temperature of the core fuel through the average temperature at the core outlet, and uses the change trend of the multiplication factor flux as a reference to determine whether the growth inflection point of the average temperature at the core outlet reflects the true temperature change inflection point of the core fuel, so as to more accurately obtain the Doppler point of the pressurized water nuclear reactor.
[0049] As Figure 1 shown, the Doppler point detection method includes the following steps:
[0050] Step S1: Drive the pressurized water nuclear reactor to conduct a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases.
[0051] In some embodiments, in step S1, the safety rod is lifted to the upper limit position, and the regulating rod and the compensating rod are adjusted to the subcritical rod position; the nuclear reactor is started, and the compensating rod is controlled to be lifted at a preset speed uniformly, driving the reactor to conduct a stable positive reaction, so that the reaction power of the nuclear reactor continuously increases according to a preset doubling period, and the neutron flux radiated by the nuclear reaction increases continuously with the working process of the nuclear reactor.
[0052] Next, execute step S2: During the increase of the neutron flux, the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction doubling period of the pressurized water nuclear reactor are obtained in real time.
[0053] In step S2, when it is monitored by the reactivity detection component that the neutron flux radiated by the pressurized water nuclear reactor continuously increases, the average temperature at the core outlet is collected in real time by the temperature detection component, and the reaction doubling period of the pressurized water nuclear reactor is collected in real time by the reactivity detection component.
[0054] As Figure 5 shown, in some embodiments, step S2 includes the following steps:
[0055] S21: Obtain the neutron flux collected by the reactivity detection component in real time.
[0056] As Figure 3 shown, in step S21, the reactivity detection component 300 used includes a source range detector 310, an intermediate range detector 320, and a power range detector. The source range detector 310, the intermediate range detector 320, and the power range detector are arranged at intervals and surround the periphery of the pressurized water nuclear reactor 100 circumferentially. Among them, the power range detector is used to measure the reaction power of the pressurized water nuclear reactor 100, and the intermediate range detector 320 is used to measure the reaction doubling period of the pressurized water nuclear reactor 100.
[0057] As Figure 7 shown, in step S21, the neutron flux radiated by the pressurized water nuclear reactor 100 is collected in real time by the reactivity detection component 300, and based on the change trend of the neutron flux over time, the process of continuous increase of the neutron flux is determined.
[0058] S22: During the increase of the neutron flux, obtain the average temperature collected by the temperature detection component in real time, and obtain the reaction doubling period collected by the reactivity detection component in real time.
[0059] As Figure 2 and Figure 4As shown, in step S22, the temperature detection component 200 used is arranged at the outlet of the reactor core 120, and the outlet of the reactor core 120 is the outlet of the pressure vessel 121 that holds fuel in the pressurized water nuclear reactor 100. The temperature detection component 200 includes a plurality of temperature sensors 210, and the plurality of temperature sensors 210 are arranged at intervals in the plane direction at the outlet of the reactor core 120. The temperature detection component 200 determines the average temperature at the outlet of the reactor core 120 based on the temperatures collected by the plurality of temperature sensors 210. Just as Figure 2 shown, in the prior art, the temperature change of the nuclear reactor 100 is usually sensed by a primary loop temperature detector in the primary loop pipeline outside the pressure vessel 121. However, the average temperature detected by the primary loop pipeline is slightly far from the fuel assembly 122, with a slow response and fluctuations and deviations. Compared with the prior art, the present disclosure measures the average temperature at the outlet of the reactor core 120 through the temperature detection component 200, can more directly obtain the temperature change in the fuel assembly 122, thereby effectively reducing the response delay, and uses the multiple temperature sensors 210 to detect the average temperature at the outlet of the reactor core 120, can effectively reduce the fluctuation error, and provide more accurate average temperature data.
[0060] In addition, in step S22, the reactivity detection component calculates the reaction multiplication period according to formula (1) based on the current signal collected by the intermediate range detector, and formula (1) is as follows:
[0061]
[0062] In formula (1), ρ is the current value collected by the intermediate range detector, T D is the reaction multiplication period, l is the prompt neutron lifetime, β eff,i is the delayed neutron fraction of the i-th group of precursor nuclei, λ i is the decay constant of the i-th group of precursor nuclei. Since the reaction efficiency of the reactor is inversely proportional to the reaction multiplication period, when the reaction efficiency has a decreasing inflection point at the Doppler point, the reaction multiplication period has an increasing inflection point at the Doppler point. Therefore, the reaction multiplication period can be used as an important reference basis for determining the Doppler point.
[0063] Next, step S3 is executed. Based on the change trend of the average temperature at the reactor core outlet with time growth and the change trend of the reaction multiplication period with time growth, the Doppler point of the pressurized water nuclear reactor is determined.
[0064] As Figure 7As shown, in step S3, with reference to the changing trends of the average temperature at the core outlet and the reaction multiplication period over time, during the process of steadily increasing the radiation neutron flux level of the nuclear reactor core with a positive reaction, when the average temperature at the core outlet shows an increasing trend (such as increasing by 0.1 °C at the next moment), and the reaction multiplication period also increases accordingly, then the inflection point of the average temperature at the core outlet is the Doppler point of the pressurized water nuclear reactor, that is, the average temperature that increases synchronously with the reaction multiplication period is taken as the Doppler point of the pressurized water nuclear reactor.
[0065] Specifically, as Figure 6 shown, in some embodiments, step S3 includes the following steps:
[0066] S31. Based on the changing trend of the average temperature at the core outlet over time, obtain the growth change points of the average temperature.
[0067] As Figure 7 shown, in step S31, based on the numerical relationship between the average temperature at the core outlet and time, obtain the relationship curve between the average temperature at the core outlet and time; take the inflection point of the slope growth in the relationship curve between the average temperature and time as the growth change point of the average temperature.
[0068] S32. Based on the changing trend of the reaction multiplication period over time, judge whether the reaction multiplication period corresponding to the growth change point shows a growth change. If so, determine that the average temperature corresponding to the growth change point is the Doppler point of the pressurized water nuclear reactor.
[0069] In step S32, based on the numerical relationship between the reaction multiplication period and time, obtain the relationship curve between the reaction multiplication period and time; then, for each growth change point selected in step S31, obtain the slope change of the relationship curve between the reaction multiplication period and time at the time corresponding to the growth change point to judge whether the reaction multiplication period shows a growth change at the time corresponding to the growth change point. If so, determine that the average temperature corresponding to the growth change point is the Doppler point of the pressurized water nuclear reactor; if not, determine that the average temperature corresponding to the growth change point does not belong to the Doppler point of the pressurized water nuclear reactor, and continue to traverse and judge whether the next growth change point belongs to the Doppler point of the pressurized water nuclear reactor until the Doppler point of the pressurized water nuclear reactor is determined and selected.
[0070] Please refer to Figures 2 to 4, in a second aspect, the present disclosure provides a Doppler point detection device for a pressurized water nuclear reactor 100. The Doppler point detection device is applied to the pressurized water nuclear reactor 100, and the applied pressurized water nuclear reactor 100 includes a housing 110, a reactor core 120, and a control rod assembly 130. The housing 110 has a receiving cavity, and the reactor core 120 is disposed in the receiving cavity. The reactor core 120 includes a pressure vessel 121 and a fuel assembly 122 assembled into the pressure vessel 121. The control rod assembly 130 is fixed above the reactor core 120 and is used to control the nuclear reaction process.
[0071] As Figures 2 to 4 shown, the Doppler point detection device includes a temperature detection component 200, a reactivity detection component 300, and a controller.
[0072] As Figure 2 and Figure 4 shown, the temperature detection component 200 is disposed at the outlet of the reactor core 120 of the pressurized water nuclear reactor 100. The temperature detection component 200 is disposed above the outlet of the pressure vessel 121. The temperature detection component 200 directly senses the temperature change in the fuel assembly 122 by measuring the average temperature at the outlet of the reactor core 120, so as to obtain the low-attenuation and low-latency temperature change condition in the fuel assembly 122. The reactivity detection component 300 is disposed outside the pressurized water nuclear reactor 100. The reactivity detection component 300 measures the reaction power of the pressurized water nuclear reactor 100 and the reaction multiplication period of the pressurized water nuclear reactor 100.
[0073] The controller is communicatively connected to the pressurized water nuclear reactor 100, the temperature detection component 200, and the reactivity detection component 300. The controller drives the pressurized water nuclear reactor 100 to perform a positive reaction in a supercritical state by controlling the control rod assembly 130, so that the neutron flux radiated by the nuclear reactor 100 continuously increases. The controller collects the neutron flux radiated by the pressurized water nuclear reactor 100 in real time through the reactivity detection component 300, and determines the process of continuous increase of the neutron flux based on the change trend of the neutron flux over time. During the increase process of the neutron flux, the controller obtains the average temperature at the outlet of the reactor core 120 measured in real time by the temperature detection component 200 and the reaction multiplication period measured by the reactivity detection component 300; the controller takes the inflection point of the average temperature that synchronously increases with the reaction multiplication period as the Doppler point of the pressurized water nuclear reactor 100 based on the change trend of the average temperature at the outlet of the reactor core 120 over time and the change trend of the reaction multiplication period over time.
[0074] As Figure 3As shown, in some embodiments, the temperature detection component 200 includes a plurality of temperature sensors 210. The plurality of temperature sensors 210 are arranged at intervals in the plane direction at the outlet of the reactor core 120. For example, in one example, the temperature detection component 200 includes 42 temperature sensors 210, and the 42 temperature sensors 210 are distributed in rows and columns on the plane at the outlet of the reactor core 120. The temperature detection component 200 determines the average temperature at the outlet of the reactor core 120 based on the temperatures collected by the plurality of temperature sensors 210. The average temperature obtained by the temperature detection component 200 through the detection of the plurality of temperature sensors 210 can effectively reduce the fluctuation error and provide more accurate average temperature data.
[0075] As Figure 4 shown, in some embodiments, the reactivity detection component 300 includes a source range detector 310, an intermediate range detector 320, and a power range detector. The source range detector 310, the intermediate range detector 320, and the power range detector are arranged at intervals and are respectively arranged around the periphery of the pressurized water nuclear reactor 100. Among them, the power range detector is used to measure the reaction power of the pressurized water nuclear reactor 100, and the intermediate range detector 320 is used to measure the reaction multiplication period of the pressurized water nuclear reactor 100.
[0076] In a third aspect, in some embodiments, the present invention provides a Doppler point detection system 10 for a pressurized water nuclear reactor, and the Doppler point detection system 10 corresponds one-to-one with the Doppler point detection method in the above embodiments.
[0077] As Figure 8 shown, the Doppler point detection system 10 includes a startup module 11, an information acquisition module 12, and a Doppler point determination module 13. The detailed description of each functional module is as follows:
[0078] The startup module 11 is used to drive the pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases;
[0079] The information acquisition module 12 is used to continuously acquire the average temperature at the outlet of the reactor core of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor during the increase of the neutron flux;
[0080] The Doppler point determination module 13 determines the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the outlet of the reactor core with time and the change trend of the reaction multiplication period with time.
[0081] In one embodiment, the information acquisition module 12 is specifically used for:
[0082] Continuously acquire the neutron flux collected by the reactivity detection component; the reactivity detection component is arranged around the pressurized water nuclear reactor;
[0083] During the growth process of the neutron flux, the average temperature collected by the temperature detection component is obtained in real time, and the reaction multiplication period collected by the reactivity detection component is obtained in real time; the temperature detection component is arranged at the core outlet.
[0084] In one embodiment, the Doppler point determination module 13 is specifically configured to use the average temperature that grows synchronously with the reaction multiplication period as the Doppler point of the pressurized water nuclear reactor.
[0085] In one embodiment, the Doppler point determination module 13 is specifically configured to:
[0086] Based on the change trend of the average temperature at the core outlet over time, obtain the growth change point of the average temperature;
[0087] Based on the change trend of the reaction multiplication period over time, determine whether there is a growth change in the reaction multiplication period corresponding to the growth change point; if so, determine the average temperature corresponding to the growth change point as the Doppler point of the pressurized water nuclear reactor.
[0088] In one embodiment, the Doppler point determination module 13 is specifically configured to:
[0089] Based on the numerical relationship between the average temperature and time, obtain the relationship curve between the average temperature and time;
[0090] Use the slope growth inflection point in the relationship curve between the average temperature and time as the growth change point of the average temperature.
[0091] For the specific limitations of the Doppler point detection system 10, reference can be made to the limitations on the Doppler point detection method in the above text, which will not be elaborated here. Each module in the above Doppler point detection system 10 can be implemented in whole or in part through software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above modules.
[0092] In one embodiment, a computer device is provided, and the internal structure diagram of the computer device can be as Figure 9As shown in the figure. The computer device includes a processor, a memory, a network interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external server through a network connection. When the computer program is executed by the processor, it realizes the functions or steps of a Doppler point detection method.
[0093] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the following steps are implemented:
[0094] Drive a pressurized water nuclear reactor to conduct a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases;
[0095] During the increase of the neutron flux, real-time obtain the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor;
[0096] Based on the change trend of the average temperature at the core outlet over time and the change trend of the reaction multiplication period over time, determine the Doppler point of the pressurized water nuclear reactor.
[0097] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the following steps are implemented:
[0098] Drive a pressurized water nuclear reactor to conduct a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases;
[0099] During the increase of the neutron flux, real-time obtain the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor;
[0100] Based on the change trend of the average temperature at the core outlet over time and the change trend of the reaction multiplication period over time, determine the Doppler point of the pressurized water nuclear reactor.
[0101] It should be noted that for the functions or steps that the above computer-readable storage medium or computer device can achieve, reference can be made to the relevant descriptions on the server side and the client side in the foregoing method embodiments. To avoid repetition, they will not be described one by one here.
[0102] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the various embodiments provided in the present application can include non-volatile and / or volatile memories. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink), DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.
Claims
1. A Doppler point detection method for a pressurized water nuclear reactor, characterized in that, Including: Driving a pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases; During the increase of the neutron flux, obtaining in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor; Based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication period with time, determining the Doppler point of the pressurized water nuclear reactor.
2. The Doppler point detection method according to claim 1, wherein The determining the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication period with time includes: Using the average temperature that increases synchronously with the reaction multiplication period as the Doppler point of the pressurized water nuclear reactor.
3. The Doppler point detection method according to claim 1 or 2, characterized in that, The determining the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time and the change trend of the reaction multiplication period with time includes: Based on the change trend of the average temperature at the core outlet with time, obtaining the growth change point of the average temperature; Based on the change trend of the reaction multiplication period with time, determining whether the reaction multiplication period corresponding to the growth change point has a growth change; if so, determining the average temperature corresponding to the growth change point as the Doppler point of the pressurized water nuclear reactor.
4. The Doppler point detection method according to claim 3, characterized in that The obtaining the growth change point of the average temperature based on the change trend of the average temperature at the core outlet with time includes: Based on the numerical relationship between the average temperature and time, obtaining the relationship curve between the average temperature and time; Using the slope growth inflection point in the relationship curve between the average temperature and time as the growth change point of the average temperature.
5. The Doppler point detection method according to claim 1, characterized in that, The obtaining in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor during the increase of the neutron flux includes: Obtaining in real time the neutron flux collected by the reactivity detection component; the reactivity detection component is arranged outside the pressurized water nuclear reactor; During the increase of the neutron flux, obtaining in real time the average temperature collected by the temperature detection component and obtaining in real time the reaction multiplication period collected by the reactivity detection component; the temperature detection component is arranged at the core outlet.
6. A Doppler point detection device for a pressurized water nuclear reactor, characterized in that, Including: A temperature detection component, which is arranged at the core outlet of the pressurized water nuclear reactor and is used to detect the average temperature of the core outlet; A reactivity detection component, which is arranged outside the pressurized water nuclear reactor and is used to detect the neutron flux and the reaction multiplication period of the pressurized water nuclear reactor; A controller, which is communicatively connected to the pressurized water nuclear reactor, the temperature detection component and the reactivity detection component, and the controller is configured to: Drive a pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases; during the increase of the neutron flux, obtain in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor; based on the change trend of the average temperature at the core outlet with time increase and the change trend of the reaction multiplication period with time increase, determine the Doppler point of the pressurized water nuclear reactor.
7. The Doppler point detection device according to claim 6, characterized in that, The temperature detection component includes a plurality of temperature sensors, and the plurality of temperature sensors are arranged at intervals in a plane at the core outlet; and / or, the reactivity detection component includes a source range detector, an intermediate range detector, and a power range detector, and the source range detector, the intermediate range detector, and the power range detector are arranged at intervals and are respectively arranged around the periphery of the pressurized water nuclear reactor.
8. A Doppler point detection system for a pressurized water nuclear reactor, characterized in that, Comprising: A startup module for driving a pressurized water nuclear reactor to have a positive reaction in a supercritical state so that the neutron flux of the nuclear reaction continuously increases; An information acquisition module for obtaining in real time the average temperature at the core outlet of the pressurized water nuclear reactor and the reaction multiplication period of the pressurized water nuclear reactor during the increase of the neutron flux; A Doppler point determination module for determining the Doppler point of the pressurized water nuclear reactor based on the change trend of the average temperature at the core outlet with time increase and the change trend of the reaction multiplication period with time increase.
9. A computer device, characterized in that, Comprising: A processor and a memory; The memory is used for storing a computer program; The processor is connected to the memory, and the processor is used for executing the computer program stored in the memory so that the computer device executes the steps of the method according to any one of claims 1 to 5.
10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 5 are implemented.