Method, device, storage medium and electronic equipment for implementing operation of subcritical rod cutting of nuclear power unit

Abstract

The present invention relates to a method, device, storage medium and electronic device for implementing operation of subcritical rods of nuclear power units, including: simulating environmental conditions of a subcritical state to put the reactor in a subcritical state; in the subcritical state, correcting the value space of the control rod; correcting the subcriticality of the core according to the core design parameters and real-time operation data of the reactor; after completing the correction of the value space of the control rod and the correction of the subcriticality of the core, operating the control rod according to a preset operation method and preset parameters; in the process of operating the control rod, recording the operation data of the control rod in real time. The present invention can realize the precise operation of the subcritical rods of the nuclear power unit, thereby improving the operation accuracy and reliability of the control rods in the subcritical state, and ensuring the safe operation and efficient overhaul of the nuclear power unit.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear energy engineering, and more specifically to a method, device, storage medium and electronic equipment for implementing subcritical rod cutting of a nuclear power unit. Background Art

[0002] During the operation of nuclear power units, control rods are key equipment for regulating reactor power and ensuring safe shutdown, and their operating accuracy and reliability are crucial. Traditional control rod value measurement methods usually need to be performed after the reactor reaches criticality, which poses a high operational risk. Subcritical rod engraving technology can verify the function of control rods by simulating space effects when the reactor has not reached criticality, thereby avoiding the risk of unplanned shutdowns and improving the efficiency of the overhaul critical path.

[0003] However, the implementation of subcritical rod carving technology requires solving multiple technical problems, including neutron fluctuation interference in the subcritical state, control rod value space correction, and core subcriticality correction. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method, device, storage medium and electronic equipment for implementing the operation of subcritical rod cutting of a nuclear power unit in view of the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a method for implementing the subcritical rod cutting operation of a nuclear power unit, comprising the following steps:

[0006] Simulate the environmental conditions of subcritical state to make the reactor in subcritical state;

[0007] Under the subcritical state, the value space of the control rod is modified;

[0008] Correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor;

[0009] After completing the value space correction of the control rod and the subcriticality correction of the core, the control rod is operated according to the preset operation method and preset parameters;

[0010] During the operation of the control rods, the operation data of the control rods are recorded in real time.

[0011] In the method for implementing the subcritical rod cutting operation of a nuclear power unit according to the present invention, the method further comprises:

[0012] performing analysis based on the operation data of the control rod;

[0013] The operating effect of the control rod is evaluated based on the analysis results.

[0014] In the subcritical rod cutting operation method of the nuclear power unit of the present invention, the environmental conditions simulating the subcritical state to put the reactor in the subcritical state include:

[0015] adjusting the coolant temperature of the reactor so that the average temperature of the coolant of the reactor meets a reference temperature range;

[0016] adjusting the coolant pressure of the reactor so that the coolant pressure of the reactor meets a reference pressure range;

[0017] monitoring an initial boron concentration of a primary loop system of the reactor and ensuring that the initial boron concentration of the primary loop system of the reactor satisfies a concentration condition;

[0018] Monitoring the movements of all control rod groups to be tested in the reactor and ensuring that all control rod groups to be tested move normally and operate in a single rod group mode;

[0019] Adjusting the setting parameters of the moving rod speeds of all control rods and making the setting parameters reach the maximum moving speed;

[0020] Monitoring the source range of the nuclear instrument system of the nuclear power unit and making the source range of the nuclear instrument system available;

[0021] The control rod to be tested is controlled to be located at a set position.

[0022] In the subcritical control rod implementation operation method of the nuclear power unit of the present invention, the correction of the value space of the control rod under the subcritical state includes:

[0023] In the subcritical state, real-time monitoring of neutron flux distribution in the reactor;

[0024] The value space of the control rod is modified according to the neutron flux distribution.

[0025] In the subcritical rod cutting operation method of the nuclear power unit described in the present invention, the correction of the subcriticality of the core according to the core design parameters and real-time operation data of the reactor includes:

[0026] Calculating the subcriticality of the core according to the core design parameters and real-time operation data of the reactor to obtain a calculated value of the subcriticality of the core;

[0027] Determining whether a calculated value of subcriticality of the core is within a safe range;

[0028] If so, no correction is made to the subcriticality of the core;

[0029] If not, the subcriticality of the core is corrected by adjusting the insertion depth and speed of the control rods.

[0030] In the subcritical rod cutting operation method for a nuclear power unit according to the present invention, the subcriticality of the core is calculated according to the core design parameters and real-time operation data of the reactor, and obtaining the subcriticality calculation value of the core includes:

[0031] Acquiring core design parameters and real-time operation data of the reactor;

[0032] Determine the neutron transport equation model based on the core's geometric structure and physical characteristics;

[0033] Calculating according to the core design parameters, the real-time operation data and the neutron transport equation model to obtain the neutron flux distribution in the core;

[0034] A calculation is performed based on the neutron flux distribution in the core to obtain a calculated value of the subcriticality of the core.

[0035] In the subcritical control rod operation method of a nuclear power unit according to the present invention, the operation of the control rod according to the preset operation method and preset parameters includes:

[0036] Control the control rods to be raised to a preset position according to a preset sequence, and establish a fully raised state for all control rods in the reactor;

[0037] Measure the reactivity in the reactor when all control rods in the reactor are in the fully raised state;

[0038] The shutdown rod group, power rod group and temperature rod group in the reactor are operated according to the preset adjustment operation method and preset parameters.

[0039] The present invention also provides a nuclear power unit subcritical rod engraving operation device, comprising:

[0040] A subcritical state simulation unit, used to simulate the environmental conditions of the subcritical state and put the reactor in a subcritical state;

[0041] a value space correction unit, used for correcting the value space of the control rod under the subcritical state;

[0042] A subcriticality correction unit, used to correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor;

[0043] An operation implementation unit, used to implement the operation on the control rod according to a preset operation method and preset parameters after completing the value space correction of the control rod and the subcriticality correction of the core;

[0044] The data recording unit is used to record the operation data of the control rod in real time during the operation of the control rod.

[0045] The present invention also provides a storage medium storing a computer program, wherein the computer program is suitable for being loaded by a processor to execute the steps of the subcritical rod implementation operation method of a nuclear power unit as described above.

[0046] The present invention also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the above-mentioned nuclear power unit subcritical rod implementation operation method by calling the computer program stored in the memory.

[0047] The implementation method, device, storage medium and electronic device of the nuclear power unit subcritical rod operation of the present invention have the following beneficial effects: including: simulating the environmental conditions of the subcritical state to put the reactor in the subcritical state; in the subcritical state, correcting the value space of the control rod; correcting the subcriticality of the core according to the core design parameters and real-time operation data of the reactor; after completing the correction of the value space of the control rod and the correction of the subcriticality of the core, operating the control rod according to the preset operation method and preset parameters; in the process of operating the control rod, recording the operation data of the control rod in real time. The present invention can realize the precise operation of the subcritical rod of the nuclear power unit, thereby improving the operation accuracy and reliability of the control rod in the subcritical state, and ensuring the safe operation and efficient overhaul of the nuclear power unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0049] Figure 1 It is a schematic flow chart of the method for implementing the subcritical rod engraving operation of a nuclear power unit provided by the present invention;

[0050] Figure 2 It is a structural schematic diagram of a subcritical rod engraving operation device for a nuclear power unit provided by the present invention. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In order to provide a method for accurately implementing the operation of subcritical rod measurement of nuclear power units (i.e., measurement of the value reactivity of control rods in reactors), the present invention improves the operating accuracy and reliability of control rods in subcritical state by optimizing the operating procedures and parameter settings of control rods, thereby ensuring the safe operation and efficient overhaul of nuclear power units.

[0053] refer to Figure 1 , Figure 1 A schematic flow chart of a preferred embodiment of a method for implementing subcritical rod engraving operation of a nuclear power unit provided by the present invention.

[0054] Specifically, Figure 1 As shown, the subcritical rod engraving operation method of the nuclear power unit includes the following steps:

[0055] Step S101: Simulate the environmental conditions of the subcritical state to put the reactor in the subcritical state.

[0056] In an embodiment of the present invention, simulating the environmental conditions of the subcritical state and placing the reactor in the subcritical state includes: adjusting the reactor coolant temperature so that the average temperature of the reactor coolant satisfies the reference temperature range; adjusting the reactor coolant pressure so that the pressure of the reactor coolant satisfies the reference pressure range; monitoring the initial boron concentration of the reactor's main loop system and making the initial boron concentration of the reactor's main loop system meet the concentration condition; monitoring the actions of all control rod groups to be tested in the reactor and ensuring that all control rod groups to be tested act normally and operate in a single rod group mode; adjusting the setting parameters of the moving rod speed of all control rods and making the setting parameters reach the maximum moving speed; monitoring the nuclear instrument system source range of the nuclear power unit and making the nuclear instrument system source range available; controlling the control rod to be tested to be located at a set position. Optionally, in an embodiment of the present invention, the reference temperature range can be: That is, the reference temperature range is: 290.4℃~293.4℃. The reference pressure range can be: That is, the reference pressure range is: 153bar~155bar. The initial boron concentration must meet the following concentration conditions: initial boron concentration CB is: 2300ppm≤CB≤2500ppm, and is greater than the theoretically calculated boron concentration when BOL (reactor life initial operation), HZP (hot zero power), ARO (rod full extraction state), keff=0.99 (effective increment coefficient) (considering the uncertainty of +100ppm). The setting position can be 5 steps.

[0057] Step S102: Under the subcritical state, the value space of the control rod is corrected.

[0058] In the embodiment of the present invention, in the subcritical state, the value space of the control rod is corrected, including: in the subcritical state, real-time monitoring of the neutron flux distribution in the reactor; and correcting the value space of the control rod according to the neutron flux distribution. Optionally, in the embodiment of the present invention, a monitoring device such as a neutron detector can be used to monitor the neutron flux distribution in the reactor in real time, and then the value space of the control rod is corrected according to the change of the neutron flux, so as to ensure that the power regulation effect of the control rod at different positions meets the requirements.

[0059] Specifically, in a nuclear reactor, a subcritical rod can correct the value space of the control rod. The value space of the control rod refers to the range of influence of the control rod on the reactivity at different positions in the reactor. Specifically, the value space of the control rod can include the following aspects: Reactivity value: When the control rod is inserted or withdrawn from the reactor, it will cause a change in the reactivity of the reactor. This change is the reactivity value of the control rod. Position-related value: When the control rod is in different positions, the degree of its influence on the reactivity is different. The value space takes into account the value changes of the control rod at different positions. Time-related value: As the reactor runs for a long time, the value of the control rod may change. The value space also takes into account this time-related value change. The subcritical rod corrects the value space of the control rod, mainly by accurately measuring and adjusting the reactivity value of the control rod at different positions and times to ensure the safe operation and control of the reactor. This correction can improve the control accuracy and stability of the reactor, reduce reactivity fluctuations, and thus ensure the normal operation of the reactor.

[0060] Step S103: Correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor.

[0061] In an embodiment of the present invention, correcting the subcriticality of the core according to the core design parameters and real-time operating data of the reactor includes: calculating the subcriticality of the core according to the core design parameters and real-time operating data of the reactor to obtain a calculated value of the subcriticality of the core; judging whether the calculated value of the subcriticality of the core is within a safe range; if so, not correcting the subcriticality of the core; if not, correcting the subcriticality of the core by adjusting the insertion depth and speed of the control rods.

[0062] Among them, the subcriticality of the core is calculated according to the core design parameters and real-time operation data of the reactor, and obtaining the calculated value of the subcriticality of the core includes: obtaining the core design parameters and real-time operation data of the reactor; determining the neutron transport equation model according to the geometric structure and physical characteristics of the core; calculating according to the core design parameters, real-time operation data and the neutron transport equation model to obtain the neutron flux distribution in the core; calculating according to the neutron flux distribution in the core to obtain the calculated value of the subcriticality of the core.

[0063] Specifically, the subcriticality of the core is accurately calculated by combining the core design parameters and real-time operation data of the reactor, and when the subcriticality of the core is not within the safe range, the insertion depth and speed of the control rods are adjusted to keep the subcriticality of the core within the safe range. The details are as follows:

[0064] First, determine the basic parameters (core design parameters and real-time operation data of the reactor): collect the core design parameters of the reactor, including the number, type, enrichment of fuel assemblies, the nature and density of the moderator, the material and size of the control rods, etc. Obtain real-time operation data, such as core power, neutron flux, coolant temperature and flow, etc.

[0065] Secondly, establish a physical model: according to the core geometry and physical properties, select a suitable neutron transport equation model, such as the diffusion equation or the Monte Carlo method. Consider various reaction types, such as fission, scattering, absorption, etc., as well as the energy distribution of neutrons.

[0066] Next, solve the neutron flux: use numerical methods to solve the neutron transport equation and obtain the neutron flux distribution in the core. The neutron flux can provide information about the reactivity of the core.

[0067] Then, the subcriticality (i.e., the calculated subcriticality value) is calculated: the subcriticality of the core is determined by comparing the actual neutron production rate and disappearance rate. Subcriticality can be expressed by a variety of indicators, such as reactivity coefficient, effective multiplication coefficient, etc. For example, an effective multiplication coefficient less than 1 indicates that the core is in a subcritical state, and the difference between it and 1 reflects the magnitude of subcriticality.

[0068] Finally, if the subcriticality value is not within the safe range, the control rod insertion depth and speed and other parameters are adjusted to keep the subcriticality of the core within the safe range.

[0069] Step S104: After completing the value space correction of the control rod and the subcriticality correction of the core, the control rod is operated according to the preset operation method and preset parameters.

[0070] In an embodiment of the present invention, operating the control rods according to a preset operation method and preset parameters includes: controlling the control rods to be raised to a preset position according to a preset sequence to establish a fully raised state for all control rods in the reactor; measuring the reactivity in the reactor when all control rods in the reactor are in the fully raised state; and operating the shutdown rod group, power rod group, and temperature rod group in the reactor according to a preset adjustment operation method and preset parameters.

[0071] After completing the above corrections, the control rods are precisely operated according to the preset operation methods and preset parameters, and the operation accuracy and reliability of the control rods are ensured through real-time monitoring and feedback mechanisms. The specific operation steps are as follows:

[0072] 1) In the order of S (shutdown rod group) and GN (power rod group), all control rod groups except R (temperature rod group) are raised to step 225.

[0073] 2) The R rods are raised to step 225 to establish a fully raised state (i.e., ARO state) for all control rods in the reactor.

[0074] 3) Click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of the ARO state for more than 4 minutes (that is, collect the reactivity in the reactor when all control rods are raised to the top of the pile for more than 4 minutes).

[0075] 4) Insert the G1 rod group (the G1 rod group is the control rod group labeled G1 in the GN rod group) down 220 steps to 5 steps, click the data acquisition button of the reactivity instrument, input the core status information according to the prompt of the reactivity instrument, and collect the SRC count rate data of G1 (5) for more than 4 minutes.

[0076] 5) Insert the N2 rod group (the N1 rod group is the control rod group labeled N1 in the GN rod group) from step 110 to step 115, click the data acquisition button of the reactivity instrument, input the core status information according to the prompt of the reactivity instrument, and collect the SRC count rate data of G1(5)-N2(115) for more than 4 minutes.

[0077] 6) Insert the N2 rod group further from step 110 to step 5, click the data acquisition button of the reactivity instrument, input the core status information according to the prompt of the reactivity instrument, and collect the SRC count rate data of G1(5)-N2(5) for more than 4 minutes.

[0078] 7) Lift the G1 rod group from 110 to 115 steps, click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of G1(115)-N2(5) for more than 4 minutes.

[0079] 8) Lift the G1 rod group up another 110 steps to 225 steps, click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of N2(5) for more than 4 minutes.

[0080] 9) Lift the N2 rod group up from 220 steps to 225 steps, and then insert the G2 rod group down from 220 steps to 5 steps. Click the data acquisition button of the reactivity meter. According to the prompt of the reactivity meter, enter the core status information and collect the SRC count rate data of G2(5) for more than 4 minutes.

[0081] 10) Lift the G2 rod group up by 220 steps to 225 steps, and then insert the N1 rod group down by 220 steps to 5 steps. Click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of N1(5) for more than 4 minutes.

[0082] 11) Lift the N1 rod group up by 220 steps to 225 steps, and then insert the SA rod group down by 220 steps to 5 steps. Click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of SA (5) for more than 4 minutes.

[0083] 12) Lift the SA rod group up 220 steps to 225 steps, then insert the SC rod group down 220 steps to 5 steps, click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of SC (5) for more than 4 minutes.

[0084] 13) Lift the SC rod group up by 220 steps to 225 steps, and then insert the SD rod group down by 220 steps to 5 steps. Click the data acquisition button of the reactivity meter. According to the prompt of the reactivity meter, input the core status information and collect the SRC count rate data of SD (5) for more than 4 minutes.

[0085] 14) Lift the SD rod group up from 220 steps to 225 steps, and then insert the SB rod group down from 220 steps to 5 steps. Click the data acquisition button of the reactivity meter. According to the prompt of the reactivity meter, enter the core status information and collect the SRC count rate data of SB (5) for more than 4 minutes.

[0086] 15) Lift the SB rod group up from 220 steps to 225 steps, and then insert the R rod group down from 220 steps to 5 steps. Click the data acquisition button of the reactivity meter. According to the prompt of the reactivity meter, enter the core status information and collect the SRC count rate data of R(5) for more than 4 minutes.

[0087] 16) Lift the R-rod assembly 220 to 225 steps, click the data acquisition button of the reactivity meter, input the core status information according to the prompt of the reactivity meter, and collect the SRC count rate data of ARO(2) for more than 4 minutes again.

[0088] 17) Complete the data processing of the above subcritical rod implementation operation to obtain the value of each group of control rods.

[0089] Step S105: During the operation of the control rod, the operation data of the control rod is recorded in real time, wherein the operation data may include but is not limited to: key data such as the position, speed, and neutron flux of the control rod.

[0090] Furthermore, in the subcritical rod cutting operation method of the nuclear power unit, after step S105, the following steps are also included:

[0091] Step S106: Perform analysis based on the control rod operation data.

[0092] Step S107: Evaluate the operating effect of the control rod according to the analysis results.

[0093] refer to Figure 2 , Figure 2 The present invention is a schematic structural diagram of a subcritical rod engraving operation device for a nuclear power unit provided by the present invention.

[0094] Specifically, Figure 2 As shown, the subcritical rod cutting operation device of the nuclear power unit includes:

[0095] The subcritical state simulation unit 201 is used to simulate the environmental conditions of the subcritical state to put the reactor in the subcritical state.

[0096] The value space correction unit 202 is used to correct the value space of the control rod in a subcritical state.

[0097] The subcriticality correction unit 203 is used to correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor.

[0098] The operation implementation unit 204 is used to implement the operation on the control rod according to the preset operation method and preset parameters after completing the value space correction of the control rod and the subcriticality correction of the core.

[0099] The data recording unit 205 is used to record the operation data of the control rod in real time during the operation of the control rod.

[0100] Furthermore, it also includes:

[0101] The data analysis unit 206 is used to perform analysis based on the operation data of the control rod.

[0102] The effect evaluation unit 207 is used to evaluate the operating effect of the control rod according to the analysis result.

[0103] Specifically, the specific coordinated operation process between the various units in the nuclear power unit subcritical rod engraving implementation operation device here can refer to the above-mentioned nuclear power unit subcritical rod engraving implementation operation method, which will not be repeated here.

[0104] By adopting the present invention, the following effects can be achieved:

[0105] Improve safety: Through subcritical rod engraving technology, the function of the control rods can be verified when the reactor has not reached the critical state, avoiding the risk of unplanned shutdown and improving the safety of nuclear power units.

[0106] Improve overhaul efficiency: Control rod operation under subcritical state can shorten the overhaul critical path time and improve overhaul efficiency.

[0107] Improve operational accuracy: The operational accuracy and reliability of control rods in subcritical conditions are improved through precise calculations, correction of control rod value space, and correction of core subcriticality.

[0108] Optimize operating parameters: Through real-time monitoring and data analysis, the operating parameters of the control rods and the operating parameters of the reactor can be optimized to improve the overall performance and economic benefits of the nuclear power unit.

[0109] In addition, an electronic device of the present invention includes a memory and a processor; the memory is used to store a computer program; the processor is used to execute the computer program to implement the subcritical rod implementation operation method of a nuclear power unit as any one of the above. Specifically, according to an embodiment of the present invention, the process described with reference to the flowchart above can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed by an electronic device and when executed, it executes the above functions defined in the method of the embodiment of the present invention. The electronic device in the present invention can be a terminal such as a notebook, a desktop, a tablet computer, a smart phone, or a server.

[0110] In addition, a storage medium of the present invention stores a computer program thereon, and when the computer program is executed by a processor, any one of the above-mentioned methods for implementing the subcritical rod of a nuclear power unit is realized. Specifically, it should be noted that the above-mentioned storage medium of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device. In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The program code contained on the computer readable medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0111] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0112] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0113] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0114] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0115] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot limit the scope of protection of the present invention. All equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A method for implementing subcritical rod cutting of a nuclear power unit, characterized in that: The following steps are involved: Simulate the environmental conditions of subcritical state to make the reactor in subcritical state; Under the subcritical state, the value space of the control rod is modified; Correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor; After completing the value space correction of the control rod and the subcriticality correction of the core, the control rod is operated according to the preset operation method and preset parameters; During the operation of the control rods, the operation data of the control rods are recorded in real time.

2. The method for implementing the subcritical rod cutting operation of a nuclear power unit according to claim 1, characterized in that: The method further comprises: performing analysis based on the operation data of the control rod; The operating effect of the control rod is evaluated based on the analysis results.

3. The method for implementing subcritical rod cutting of a nuclear power unit according to claim 1, characterized in that: The environmental conditions of simulating the subcritical state to put the reactor in the subcritical state include: adjusting the coolant temperature of the reactor so that the average temperature of the coolant of the reactor meets a reference temperature range; adjusting the coolant pressure of the reactor so that the coolant pressure of the reactor meets a reference pressure range; monitoring an initial boron concentration of a primary loop system of the reactor and ensuring that the initial boron concentration of the primary loop system of the reactor satisfies a concentration condition; Monitoring the movements of all control rod groups to be tested in the reactor and ensuring that all control rod groups to be tested move normally and operate in a single rod group mode; Adjusting the setting parameters of the moving rod speeds of all control rods and making the setting parameters reach the maximum moving speed; Monitoring the source range of the nuclear instrument system of the nuclear power unit and making the source range of the nuclear instrument system available; The control rod to be tested is controlled to be located at a set position.

4. The method for implementing subcritical rod cutting of a nuclear power unit according to claim 1, characterized in that: The correction of the value space of the control rod under the subcritical state includes: In the subcritical state, real-time monitoring of neutron flux distribution in the reactor; The value space of the control rod is modified according to the neutron flux distribution.

5. The method for implementing subcritical rod cutting of a nuclear power unit according to claim 1, characterized in that: The method of correcting the subcriticality of the core according to the core design parameters and real-time operation data of the reactor includes: Calculating the subcriticality of the core according to the core design parameters and real-time operation data of the reactor to obtain a calculated value of the subcriticality of the core; Determining whether a calculated value of subcriticality of the core is within a safe range; If so, no correction is made to the subcriticality of the core; If not, the subcriticality of the core is corrected by adjusting the insertion depth and speed of the control rods.

6. The method for implementing subcritical rod cutting of a nuclear power unit according to claim 5, characterized in that: The step of calculating the subcriticality of the core according to the core design parameters and real-time operation data of the reactor to obtain a calculated value of the subcriticality of the core includes: Acquiring core design parameters and real-time operation data of the reactor; Determine the neutron transport equation model based on the core's geometric structure and physical characteristics; Calculating according to the core design parameters, the real-time operation data and the neutron transport equation model to obtain the neutron flux distribution in the core; A calculation is performed based on the neutron flux distribution in the core to obtain a calculated value of the subcriticality of the core.

7. The method for implementing subcritical rod cutting of a nuclear power unit according to claim 1, characterized in that: The operating the control rod according to the preset operating method and preset parameters includes: Control the control rods to be raised to a preset position according to a preset sequence, and establish a fully raised state for all control rods in the reactor; Measure the reactivity in the reactor when all control rods in the reactor are in the fully raised state; The shutdown rod group, power rod group and temperature rod group in the reactor are operated according to the preset adjustment operation method and preset parameters.

8. A nuclear power unit subcritical rod engraving operation device, characterized in that: include: A subcritical state simulation unit, used to simulate the environmental conditions of the subcritical state and put the reactor in a subcritical state; a value space correction unit, used for correcting the value space of the control rod under the subcritical state; A subcriticality correction unit, used to correct the subcriticality of the core according to the core design parameters and real-time operation data of the reactor; An operation implementation unit, used to implement the operation on the control rod according to a preset operation method and preset parameters after completing the value space correction of the control rod and the subcriticality correction of the core; The data recording unit is used to record the operation data of the control rod in real time during the operation of the control rod.

9. A storage medium, characterized in that: The storage medium stores a computer program, and the computer program is suitable for being loaded by a processor to execute the steps of the method for implementing the subcritical rod operation of a nuclear power unit as claimed in any one of claims 1 to 7.

10. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory stores a computer program, and the processor executes the steps of the subcritical rod implementation operation method of a nuclear power unit as claimed in any one of claims 1 to 7 by calling the computer program stored in the memory.

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