Method and apparatus for evaluating performance of a boron-lined proportional counter tube

Abstract

The present disclosure belongs to the technical field of nuclear power and particularly relates to a boron-lined proportional counter tube performance evaluation method and device. The method of the present disclosure can be completely applied to the performance inspection of boron-lined proportional counter tubes of source range detectors of an out-of-pile nuclear measurement system during overhaul of a related unit. Through project optimization, the performance test of the boron-lined proportional counter tube is removed from the critical path, thereby saving about 3 hours of main line time of the critical path during overhaul, and saving 2 million yuan per unit per overhaul. The application of the method of the present disclosure can effectively supervise the performance change of the boron-lined proportional counter tube of the source range detector of the out-of-pile nuclear measurement system, accurately judge the failure stage and aging trend of the detector, reduce the probability of unexpected equipment failure, and prolong the service life of the equipment.

Description

Technical Field

[0001] This invention belongs to the field of nuclear power technology, specifically relating to a method and apparatus for evaluating the performance of a boron-lined proportional counter tube. Background Technology

[0002] In related technologies, the performance evaluation method for boron-lined proportional counter tubes of the source range measurement system in nuclear power plants involves executing plateau curves during the main power reduction phase of an overhaul, and evaluating whether the detector performance can meet the performance requirements of the next fuel cycle based on a single result of the plateau curve. This method has the following drawbacks:

[0003] 1. The execution period occupies about 1 hour of the main time of the overhaul, which brings huge risks and losses to the safety and economic benefits of the unit;

[0004] 2. The execution conditions are stringent, and the actual unit status is unstable, resulting in a significant deviation from the actual theoretical requirements;

[0005] 3. The experimental results are limited, and the data deviation is large due to core fluctuations, making it impossible to accurately evaluate the detector performance.

[0006] 4. Lack of lifespan prediction models; only the current equipment qualification level can be analyzed, lacking theoretical methods for predicting subsequent failures or lifespan.

[0007] 5. Currently, the evaluation indicators of some power plants lack scientific rigor and rationality. On the one hand, this increases the pressure on operation and maintenance personnel by requiring unnecessary maintenance to meet the indicators; on the other hand, it greatly reduces the usable lifespan of detectors. Therefore, it is urgent to improve the accuracy and efficiency of maintenance work on boron-lined proportional counter tubes of source range detectors in off-core nuclear measurement systems. Summary of the Invention

[0008] To overcome the problems existing in related technologies, a method and apparatus for evaluating the performance of boron-lined proportional counter tubes are provided.

[0009] According to one aspect of the present disclosure, a method for evaluating the performance of a boron-lined proportional counter tube is provided, the method comprising:

[0010] Step 11: After the reactor has been shut down for 2-5 hours, perform the plotting of the boron-lined proportional counter tube curve.

[0011] Step 12: For the high voltage plateau curve, divide the high voltage value interval corresponding to the high voltage plateau curve into multiple high voltage value sub-intervals, and sample each high voltage value interval using a preset voltage value interval. For the discrimination threshold voltage plateau curve, divide the discrimination threshold voltage value interval corresponding to the discrimination threshold voltage plateau curve into multiple discrimination threshold voltage value sub-intervals, and sample each discrimination threshold voltage value interval using a preset voltage value interval.

[0012] Step 13: Based on the voltage data collected in Step 12, determine multiple performance parameters using the overhaul performance algorithm model;

[0013] Step 14: Based on multiple performance parameters and overhaul performance evaluation standards, obtain the overhaul performance evaluation results of the boron-lined proportional counter tube.

[0014] In one possible implementation, in step 13, for the high-voltage plateau curve, the following performance parameters are determined, including: determining the high-voltage plateau slope corresponding to the width of multiple high-voltage values ​​under the high-voltage setpoint, determining the high-voltage slope corresponding to multiple high-voltage value parameters, and determining the maximum count rate, minimum count rate, and initial count rate of the high-voltage plateau curve.

[0015] In step 14, judgment conditions are set for each performance parameter. If the performance parameter meets the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning normally, and a prompt message indicating that the boron-based proportional counter is functioning normally is displayed. If the performance parameter does not meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage should be adjusted is displayed.

[0016] In one possible implementation, the method further includes the following steps to assess the lifespan of a boron-lined proportional counter:

[0017] Step 21: Determine multiple lifespan parameters of the boron-lined proportional counter tube;

[0018] Step 22: Based on the multiple lifespan parameters and lifespan performance evaluation criteria of the boron-lined proportional counter tube, obtain the lifespan evaluation results of the boron-lined proportional counter tube.

[0019] In one possible implementation, the following lifetime parameters are determined:

[0020] Manufacturing time of boron-lined proportional counter tubes; Installation time of boron-lined proportional counter tubes;

[0021] The accuracy of the modulus count rate and doubling time of the boron-lined proportional counter tube secondary instrument during low water level and power operation of the unit is used to determine the aging condition of the secondary instrument.

[0022] During the low water level period of the unit, the following parameters were determined: the function and accuracy of the boron-lined proportional counter tube's switching quantity, the insulation of the boron-lined proportional counter tube, and the capacitance of the boron-lined proportional counter tube.

[0023] Under zero-power conditions, the following parameters are determined: the source range count ratio of the two boron-lined proportional counters at each preset time; the source range count ratio of the two boron-lined proportional counters under each intermediate current range; the source range count ratio of the two boron-lined proportional counters under the preset intermediate current range when triggered by the P6 signal; the source range count ratio of the two boron-lined proportional counters under the preset intermediate current range when not triggered by the P6 signal; the time from 1% power to source range activation; the time from intermediate 10E-8A to source range activation; the time difference between the source range activation of the two boron-lined proportional counters; the time from source range activation to the bottom of the control rod stack; the count rate of the source range channel activation; and the stable count rate at the bottom of the control rod stack.

[0024] Step 22 includes setting judgment conditions for each lifespan parameter. If the lifespan parameter meets the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning normally, and a prompt message indicating that the boron-based proportional counter has a normal lifespan is displayed. If the lifespan parameter does not meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage adjusted is displayed.

[0025] In one possible implementation, if the lifespan parameter is determined not to meet the corresponding judgment condition, secondary verification data is further determined, and it is judged whether the secondary verification data meets the secondary verification condition. If the determined secondary verification data meets the corresponding judgment condition, the lifespan is evaluated again; if the determined secondary verification data does not meet the corresponding judgment condition, the boron-based proportional counter is judged to be malfunctioning, and a prompt message is displayed to prompt the replacement of the boron-based proportional counter or adjustment of the voltage.

[0026] In one possible implementation, the secondary verification data includes: total fuel rod burnup, boron concentration, burnup, control rod reactivity, source range count rate after loading, primary loop temperature, and primary loop flow rate during loading and zero-power periods.

[0027] In one possible implementation, the method further includes: step 31, performing cyclic verification on the unit, and after each fuel cycle, adopting the data tracking and maintenance methods corresponding to the evaluation results based on the evaluation results, and setting the data collection points and verification methods for the next cycle.

[0028] According to another aspect of the present disclosure, a performance evaluation device for a boron-lined proportional counter tube is provided, the device comprising:

[0029] The execution module is used to perform the plotting of boron-lined proportional counter tube curves after a reactor shutdown of 2-5 hours.

[0030] The sampling module is used to divide the high-voltage value interval corresponding to the high-voltage plateau curve into multiple high-voltage value sub-intervals for each high-voltage value interval, and to sample at a preset voltage value interval for each high-voltage value interval. For the discrimination threshold voltage plateau curve, the discrimination threshold voltage value interval corresponding to the discrimination threshold voltage plateau curve is divided into multiple discrimination threshold voltage value sub-intervals, and to sample at a preset voltage value interval for each discrimination threshold voltage value interval.

[0031] The determination module is used to determine multiple performance parameters based on the voltage data collected in step 12 and the overhaul performance algorithm model.

[0032] The evaluation module is used to obtain the overhaul performance evaluation results of boron-lined proportional counter tubes based on multiple performance parameters and overhaul performance evaluation standards.

[0033] According to another aspect of the present disclosure, a performance evaluation device for a boron-lined proportional counter tube is provided, the device comprising:

[0034] processor;

[0035] Memory used to store processor-executable instructions;

[0036] The processor is configured to execute the above-described method.

[0037] According to another aspect of the present disclosure, a non-volatile computer-readable storage medium is provided, on which computer program instructions are stored, which, when executed by a processor, implement the above-described method.

[0038] The beneficial effects of this disclosure are as follows:

[0039] 1. The method disclosed herein is fully applicable to the performance inspection of the boron-lined proportional counter tube of the source range detector of the external nuclear measurement system during the overhaul of relevant units. Through project optimization, the relevant performance test of the boron-lined proportional counter tube has been removed from the critical path, saving about 3 hours of critical path overhaul time and saving RMB 2 million per unit per overhaul.

[0040] 2. The application of the method disclosed herein can effectively monitor the performance changes of the boron-lined proportional counter tube of the source range detector in the off-core nuclear measurement system, accurately determine the failure stage and aging trend of the detector, reduce the probability of unexpected equipment failure, and extend the service life of the equipment.

[0041] 3. The method disclosed herein is based on equipment usage data, operating condition data, detector performance data, and replacement data to predict equipment failure, service, and spare parts demand, providing technical support for proactive service, extending equipment lifespan, and reducing failure rate. It is a summary and analysis of many years of operation and maintenance production data from nuclear power plants, and is based on the original maintenance strategy of the original manufacturer.

[0042] This disclosure achieves the monitoring, maintenance, evaluation, and lifespan prediction of boron-lined proportional counter tubes by changing the prerequisites for operation, adding new testing methods and standards, analyzing historical data, applying new algorithms, and formulating reasonable evaluation criteria for performance throughout the entire lifespan. Attached Figure Description

[0043] Figure 1 This is a flowchart illustrating a method for evaluating the performance of a boron-lined proportional counter tube according to an exemplary embodiment.

[0044] Figure 2 This is a flowchart illustrating a boron-lined proportional counter tube performance evaluation device according to an exemplary embodiment. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Figure 1 This is a flowchart illustrating a method for evaluating the performance of a boron-lined proportional counter tube according to an exemplary embodiment. The method can be executed by a terminal device, which can be a server, desktop computer, laptop computer, etc. This disclosure does not limit the type of terminal device. Figure 1 As shown, the method may include:

[0047] Step 11: After the reactor has been shut down for 2-5 hours, perform the plotting of the boron-lined proportional counter tube curve.

[0048] The existing technology involves plotting the boron-lined proportional counter tube curve approximately 1 hour after reactor shutdown. This method requires the operator to maintain a stable power level for the unit, and the first hour after shutdown is the critical period for overhaul work, resulting in a downtime and actual project duration of approximately 2 hours. In view of this, this disclosure proposes performing the boron-lined proportional counter tube curve plotting 2-5 hours after shutdown. This eliminates the need for the operator to maintain a stable power level and does not occupy the critical overhaul time. The actual project duration for plotting the boron-lined proportional counter tube curve is 1.5 hours, falling within the non-critical time of the overhaul. Using the method of this disclosure will significantly reduce the overhaul time by approximately 2 hours, creating substantial economic benefits. This work requires no operator intervention, reducing operator hours and manpower, and increasing operator control over the unit's safety.

[0049] Step 12: For the high voltage plateau curve, divide the high voltage value interval corresponding to the high voltage plateau curve into multiple high voltage value sub-intervals, and sample each high voltage value interval using a preset voltage value interval. For the discrimination threshold voltage plateau curve, divide the discrimination threshold voltage value interval corresponding to the discrimination threshold voltage plateau curve into multiple discrimination threshold voltage value sub-intervals, and sample each discrimination threshold voltage value interval using a preset voltage value interval.

[0050] In related technologies, due to the ambiguity in the acceptance and evaluation criteria for curve plotting results, key points are not highlighted during the plotting process, resulting in a relatively uniform data collection process that cannot accurately reflect the performance of boron-lined proportional counters in nuclear power plants. The method disclosed in this invention significantly increases the number of voltage sampling points, enabling refined measurements of key areas to ensure accurate understanding of minute performance changes in the boron-lined proportional counter, while reducing the probability of error in a single measurement. Furthermore, this invention provides more flexibility in terms of project timeline control, and reduces operational pressure and risk for personnel.

[0051] In one possible implementation, sampling can be repeated multiple times at each sampling point, and the average or median of the voltage values ​​obtained from the multiple samplings can be used as the sample value for that sampling point. For example, for the sampling point at 620V on the high-voltage plateau curve, sampling can be repeated three times, and the average of the three sampled voltage values ​​can be used as the sample value for the 620V sampling point. In this way, by performing sampling multiple times, the inaccuracy of the measurement can be further reduced.

[0052] In one possible implementation, the high-voltage plateau curve corresponds to a high-voltage value range of 600-950V. The 600-950V range is divided into multiple high-voltage value sub-ranges: 600-700V, 700-800V, 800-900V, and 900-950V. For the 600-700V high-voltage value sub-range, sampling is performed at an interval of 20V; for the 700-800V high-voltage value sub-range, sampling is performed at an interval of 40V; for the 800-900V high-voltage value sub-range, sampling is performed at an interval of 10V; and for the 900-950V high-voltage value sub-range, sampling is performed at an interval of 25V.

[0053] Specifically, points were taken at 20V intervals between 600V and 700V to more accurately obtain the high-voltage starting voltage of the source-range boron-based proportional counter tube; points were taken at 40V intervals between 700V and 800V to more accurately obtain the inflection point voltage of the plateau curve of the boron-based proportional counter tube; points were taken at 10V intervals between 800V and 900V to more accurately obtain the plateau slope voltage of the plateau curve of the boron-based proportional counter tube; and points were taken at 15V intervals between 900V and 950V to more accurately obtain the termination voltage of the plateau curve of the boron-based proportional counter tube. The voltage data collected above were used for subsequent algorithm model analysis.

[0054] In one possible implementation, the discrimination voltage plateau curve corresponds to a discrimination threshold voltage range of 0-1.6V. The 0-1.6V range is divided into multiple discrimination threshold voltage sub-ranges: 0-0.2V, 0.2-0.8V, and 0.8-1.6V. For the 0-0.2V discrimination threshold voltage sub-range, sampling is performed at intervals of 0.05V; for the 0.2-0.8V discrimination threshold voltage sub-range, sampling is performed at intervals of 0.02V; and for the 0.8-1.6V discrimination threshold voltage sub-range, sampling is performed at intervals of 0.1V.

[0055] The purpose of this disclosure is to take points at intervals of 0.05V between 0-0.2V to obtain the initial trend voltage of the discrimination voltage of the boron-based proportional counter tube in the source range; to take points at intervals of 0.02V between 0.2V and 0.8V to obtain the inflection point voltage and plateau voltage of the plateau curve of the boron-based proportional counter tube more accurately; and to take points at intervals of 0.1V between 0.8V and 1.6V to obtain the trend of the discrimination voltage in the unusable region more accurately.

[0056] Step 13: Based on the voltage data collected in Step 12, determine multiple performance parameters using the overhaul performance algorithm model.

[0057] Step 14: Based on multiple performance parameters and overhaul performance evaluation standards, obtain the overhaul performance evaluation results of the boron-lined proportional counter tube.

[0058] For example, in step 13, for the high voltage plateau curve, the following performance parameters are determined, including: determining the high voltage plateau slope corresponding to the width of multiple high voltage values ​​under the high voltage setpoint, determining the high voltage slope corresponding to multiple high voltage value parameters, and determining the maximum count rate, minimum count rate and initial count rate of the high voltage plateau curve.

[0059] For example, if the high voltage plateau is tilted

[0060] Where m is the high-voltage setpoint, and n is the high-voltage voltage to width. The pulse count rate of a boron-based proportional counter tube at time T1 under voltage value mn is given. The pulse count rate of a boron-based proportional counter tube at time T2 under voltage value m+n. The pulse count rate of a boron-based proportional counter tube at time T1 is given by voltage m. C represents the pulse count rate of a boron-based proportional counter tube at voltage m and time T2. m Let m be the average pulse count rate of the boron-based proportional counter tube at a voltage value of m. Then, m = 850V can be set, and the corresponding high-voltage plateaus for n = 20V, n = 50V, n = 80V, and n = 100V can be determined respectively.

[0061] If the slope of the high pressure Among them, C j C represents the average pulse count rate of a boron-lined proportional counter tube at a voltage value j. k Let k be the average pulse count rate of the boron-based proportional counter tube at a voltage value of k. Then, the high voltage slopes corresponding to jk = 20V, jk = 50V, jk = 80V, and jk = 100V can be determined respectively.

[0062] For the discrimination voltage plateau curve, the following performance parameters are determined, including: determining the discrimination slope corresponding to multiple voltage value widths under the discrimination voltage setpoint, determining the discrimination slope corresponding to multiple discrimination voltage value parameters, and determining the maximum count rate, minimum count rate, and initial count rate of the discrimination voltage plateau curve.

[0063] For example, if we identify voltage plateau tilt

[0064] Where p is the discrimination voltage setpoint, and q is the discrimination voltage to width. The pulse count rate of a boron-based proportional counter tube at time T1 under voltage value pq is given. The pulse count rate of a boron-based proportional counter tube at time T2 under voltage p+q is given. The pulse count rate of a boron-based proportional counter tube at time T1 under voltage value p. C represents the pulse count rate of a boron-based proportional counter tube at time T2 under voltage q. p Let p be the average pulse count rate of the boron-based proportional counter tube at a voltage value of p. Then p = 0.6, and the discrimination voltage plateaus corresponding to q = 0.2, q = 0.3, q = 0.4, and q = 0.5 can be determined respectively.

[0065] If we distinguish the slope Among them, C r C represents the average pulse count rate of a boron-lined proportional counter tube at a voltage value of r. s Let be the average pulse count rate of the boron-based proportional counter tube at a voltage value s. Then, the discrimination slopes corresponding to rs = 0.2, rs = 0.3, rs = 0.4, and rs = 0.5 can be determined respectively.

[0066] Continuing with the previous example, in step 14, judgment conditions can be set for each performance parameter. If the performance parameter is determined to meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning normally, and a prompt message indicating that the boron-based proportional counter is functioning normally is displayed. If the performance parameter is determined not to meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage adjusted is displayed.

[0067] In one possible implementation, the method of this disclosure further includes performing the following steps on the boron-lined proportional counter: Step 21, determining multiple life parameters of the boron-lined proportional counter;

[0068] Step 22: Based on the multiple lifespan parameters and lifespan performance evaluation criteria of the boron-lined proportional counter tube, the lifespan evaluation results of the boron-lined proportional counter tube can be obtained.

[0069] For example, step 21 may include: the manufacturing time of the boron-lined proportional counter and the installation time of the boron-lined proportional counter, which can be used to determine the overall aging of the boron-lined proportional counter.

[0070] The accuracy of the modulus count rate and doubling time of the boron-lined proportional counter tube secondary instrument during low water level and power operation of the unit can be used to determine the aging condition of the secondary instrument.

[0071] During periods of low water level in the unit, the following parameters should be determined: the function and accuracy of the boron-lined proportional counter, the insulation of the boron-lined proportional counter, and the capacitance of the boron-lined proportional counter. These parameters can be used to determine the overall aging condition of the boron-lined proportional counter.

[0072] The following parameters are determined under zero-power conditions: the source-range count rate ratio of the two boron-lined proportional counters at each preset time; the source-range count rate ratio of the two boron-lined proportional counters at each intermediate current range; the source-range count rate ratio of the two boron-lined proportional counters at the preset intermediate current range under P6 signal triggering; the source-range count rate ratio of the two boron-lined proportional counters at the preset intermediate current range under P6 non-signal triggering; the time from 1% power to source range activation; the time from intermediate 10E-8A to source range activation; the time difference between the source range activation of the two boron-lined proportional counters; the time from source range activation to the bottom of the control rod stack; the count rate of the source range channel activation; and the stable count rate at the bottom of the control rod stack. The above source-range and intermediate-range count rates can be used as data sources for consistency judgment of the two boron-lined proportional counters. The performance degradation of the source range detector can be observed based on the comparison results.

[0073] Step 22 may include setting judgment conditions for each lifespan parameter. If the lifespan parameter meets the corresponding judgment conditions, the boron-based proportional counter is deemed to be functioning normally, and a prompt message indicating that the boron-based proportional counter's lifespan is normal is displayed. If the lifespan parameter does not meet the corresponding judgment conditions, the boron-based proportional counter is deemed to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage adjusted is displayed.

[0074] In one possible implementation, if the lifespan parameter is determined not to meet the corresponding judgment condition, secondary verification data can be further determined, and it can be judged whether the secondary verification data meets the secondary verification condition. If the determined secondary verification data meets the corresponding judgment condition, the lifespan can be evaluated again; if the determined secondary verification data does not meet the corresponding judgment condition, the boron-based proportional counter is judged to be malfunctioning, and a prompt message is displayed to prompt the replacement of the boron-based proportional counter or adjustment of the voltage.

[0075] Secondary validation data may include: total fuel rod burnup, boron concentration, burnup, control rod reactivity, source range count rate after loading, primary loop temperature, and primary loop flow rate during loading and zero-power periods.

[0076] In one possible implementation, the method disclosed herein further includes: performing cyclic verification on the unit, and after each fuel cycle, adopting new data tracking and maintenance methods based on the evaluation results (maintaining the original state / modifying voltage / modifying parameters / inspecting equipment parts / replacing the entire equipment) to ensure the effectiveness and accuracy of subsequent actions based on the evaluation results, and setting the data collection points and verification methods for the next cycle to achieve the effect of continuous and uninterrupted performance tracking.

[0077] The beneficial effects of this disclosure are as follows:

[0078] 1. The method disclosed herein is fully applicable to the performance inspection of the boron-lined proportional counter tube of the source range detector of the external nuclear measurement system during the overhaul of relevant units. Through project optimization, the relevant performance test of the boron-lined proportional counter tube has been removed from the critical path, saving about 3 hours of critical path overhaul time and saving RMB 2 million per unit per overhaul.

[0079] 2. The application of the method disclosed herein can effectively monitor the performance changes of the boron-lined proportional counter tube of the source range detector in the off-core nuclear measurement system, accurately determine the failure stage and aging trend of the detector, reduce the probability of unexpected equipment failure, and extend the service life of the equipment.

[0080] 3. The method disclosed herein is based on equipment usage data, operating condition data, detector performance data, and replacement data to predict equipment failure, service, and spare parts demand, providing technical support for proactive service, extending equipment lifespan, and reducing failure rate. It is a summary and analysis of many years of operation and maintenance production data from nuclear power plants, and is based on the original maintenance strategy of the original manufacturer.

[0081] This disclosure achieves the monitoring, maintenance, evaluation, and lifespan prediction of boron-lined proportional counter tubes by changing the prerequisites for operation, adding new testing methods and standards, analyzing historical data, applying new algorithms, and formulating reasonable evaluation criteria for performance throughout the entire lifespan.

[0082] Table 1 compares the economic effects of the relevant technology method in an application example with the method disclosed herein, as shown in Table 1.

[0083] Table 1

[0084]

[0085] According to another aspect of the present disclosure, a performance evaluation device for a boron-lined proportional counter tube is provided, the device comprising:

[0086] The execution module is used to perform the plotting of boron-lined proportional counter tube curves after a reactor shutdown of 2-5 hours.

[0087] The sampling module is used to divide the high-voltage value interval corresponding to the high-voltage plateau curve into multiple high-voltage value sub-intervals for each high-voltage value interval, and to sample at a preset voltage value interval for each high-voltage value interval. For the discrimination threshold voltage plateau curve, the discrimination threshold voltage value interval corresponding to the discrimination threshold voltage plateau curve is divided into multiple discrimination threshold voltage value sub-intervals, and to sample at a preset voltage value interval for each discrimination threshold voltage value interval.

[0088] The determination module is used to determine multiple performance parameters based on the voltage data collected in step 12 and the overhaul performance algorithm model.

[0089] The evaluation module is used to obtain the overhaul performance evaluation results of boron-lined proportional counter tubes based on multiple performance parameters and overhaul performance evaluation standards.

[0090] The description of the above-mentioned apparatus has already been elaborated in the description of the above-mentioned method, and will not be repeated here.

[0091] Figure 2 This is a flowchart illustrating a performance evaluation apparatus for a boron-lined proportional counter tube according to an exemplary embodiment. For example, apparatus 1900 can be provided as a server. (Refer to...) Figure 2 The apparatus 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the methods described above.

[0092] Device 1900 may also include a power supply component 1926 configured to perform power management of device 1900, a wired or wireless network interface 1950 configured to connect device 1900 to a network, and an input / output (I / O) interface 1958. Device 1900 can operate on an operating system stored in memory 1932, such as Windows Server™, MacOS X™, Unix™, Linux™, FreeBSD™, or similar.

[0093] In an exemplary embodiment, a non-volatile computer-readable storage medium is also provided, such as a memory 1932 including computer program instructions that can be executed by a processing component 1922 of the device 1900 to perform the above-described method.

[0094] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0095] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0096] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0097] Computer program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing the status information of the computer-readable program instructions to implement various aspects of this disclosure.

[0098] Various aspects of this disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It should 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-readable program instructions.

[0099] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0100] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0101] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0102] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A method for evaluating the performance of a boron-lined proportional counter tube, characterized in that, The method includes: Step 11: After the reactor has been shut down for 2-5 hours, perform the plotting of the boron-lined proportional counter tube curve. Step 12: For the high voltage plateau curve, divide the high voltage value interval corresponding to the high voltage plateau curve into multiple high voltage value sub-intervals, and sample each high voltage value interval using a preset voltage value interval. For the discrimination threshold voltage plateau curve, divide the discrimination threshold voltage value interval corresponding to the discrimination threshold voltage plateau curve into multiple discrimination threshold voltage value sub-intervals, and sample each discrimination threshold voltage value interval using a preset voltage value interval. Step 13: Based on the voltage data collected in Step 12, determine multiple performance parameters using the overhaul performance algorithm model; Step 14: Based on multiple performance parameters and overhaul performance evaluation standards, obtain the overhaul performance evaluation results of the boron-lined proportional counter tube. The method also includes the following steps for life assessment of boron-lined proportional counter tubes: Step 21: Determine multiple lifespan parameters of the boron-lined proportional counter tube; Step 22: Based on the multiple lifespan parameters and lifespan performance evaluation criteria of the boron-lined proportional counter tube, obtain the lifespan evaluation results of the boron-lined proportional counter tube. Determine the following lifespan parameters: Manufacturing time of boron-lined proportional counter tubes; Installation time of boron-lined proportional counter tubes; The accuracy of the modulus count rate and doubling time of the boron-lined proportional counter tube secondary instrument during low water level and power operation of the unit is used to determine the aging condition of the secondary instrument. During the low water level period of the unit, the following parameters were determined: the function and accuracy of the boron-lined proportional counter tube's switching quantity, the insulation of the boron-lined proportional counter tube, and the capacitance of the boron-lined proportional counter tube. Under zero-power conditions, the following parameters are determined: the source range count ratio of the two boron-lined proportional counters of the unit at each preset time, the source range count ratio of the two boron-lined proportional counters of the unit under each intermediate range current, the source range count ratio of the two boron-lined proportional counters of the unit under the preset intermediate range current when triggered by the P6 signal, the source range count ratio of the two boron-lined proportional counters of the unit under the preset intermediate range current when not triggered by the P6 signal, the time from 1% power to source range activation, the time from intermediate 10E-8A to source range activation, the time difference between the source range activation of the two boron-lined proportional counters, the time from source range activation to the bottom of the control rod stack, the count rate of the source range channel activation, and the stable count rate at the bottom of the control rod stack. Step 22 includes setting judgment conditions for each lifespan parameter. If the lifespan parameter meets the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning normally, and a prompt message indicating that the boron-based proportional counter has a normal lifespan is displayed. If the lifespan parameter does not meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage adjusted is displayed.

2. The method according to claim 1, characterized in that, In step 13, for the high voltage plateau curve, the following performance parameters are determined, including: determining the high voltage plateau slope corresponding to the width of multiple high voltage values ​​under the high voltage setpoint, determining the high voltage slope corresponding to multiple high voltage value parameters, and determining the maximum count rate, minimum count rate and initial count rate of the high voltage plateau curve; In step 14, judgment conditions are set for each performance parameter. If the performance parameter meets the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning normally, and a prompt message indicating that the boron-based proportional counter is functioning normally is displayed. If the performance parameter does not meet the corresponding judgment conditions, the boron-based proportional counter is judged to be functioning abnormally, and a prompt message indicating that the boron-based proportional counter should be replaced or the voltage should be adjusted is displayed.

3. The method according to claim 1, characterized in that, If the lifespan parameters are determined not to meet the corresponding judgment conditions, secondary verification data is further determined, and it is judged whether the secondary verification data meets the secondary verification conditions. If the secondary verification data meets the corresponding judgment conditions, the lifespan assessment is performed again; if the secondary verification data does not meet the corresponding judgment conditions, the boron-lined proportional counter is judged to be malfunctioning, and a prompt message is displayed to remind the user to replace the boron-lined proportional counter or adjust the voltage.

4. The method according to claim 3, characterized in that, Secondary validation data include: total fuel rod burnup, boron concentration, burnup, control rod reactivity, source range count rate after loading, primary loop temperature, and primary loop flow rate during loading and zero-power periods.

5. The method according to claim 1, characterized in that, The method further includes: step 31, performing cyclic verification on the unit, and after each fuel cycle, based on the evaluation results, adopting the data tracking and maintenance methods corresponding to the evaluation results, and setting the data collection points and verification methods for the next cycle.

6. A performance evaluation device for a boron-lined proportional counter tube, characterized in that, The device includes: processor; Memory used to store processor-executable instructions; The processor is configured to perform the method according to any one of claims 1 to 5.

7. A non-volatile computer-readable storage medium storing computer program instructions thereon, characterized in that, When the computer program instructions are executed by the processor, they implement the method described in any one of claims 1 to 5.

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