Method for determining reserve quantity of spare parts of nuclear power plant and computer equipment

Abstract

The invention relates to a nuclear power plant spare part reserve determination method and computer equipment. The method comprises the following steps: according to spare part attribute information of target spare parts of a nuclear power plant group, determining the number of effective installation positions and effective reserve of the target spare parts in the nuclear power plant group in a future time period; according to the number of the effective installation positions and the effective reserve, determining the reference reserve of the target spare parts in the nuclear power plant group under the condition that the function value of the total cost function of the target spare parts is minimum; wherein the total cost function is used for describing the cost generated by the target spare part in the spare part life period; determining the total reserve of the target spare parts in the nuclear power plant group according to the reference reserve of the target spare parts, the number of effective installation positions and the target guarantee rate; and according to the total reserve and the reserve requirements of the nuclear power plant group, determining the target reserve of each nuclear power plant for the target spare part in the nuclear power plant group in the future period. The method can accurately predict the reserve amount of target spare parts reserved by each nuclear power plant in the nuclear power plant group in the future time period.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear power plants, and in particular to a method and computer equipment for determining the spare parts reserve quantity of a nuclear power plant. Background Art

[0002] Strategic spare parts for nuclear power plants refer to major equipment that is directly related to nuclear safety or unit availability of power plants, has no expected replacement cycle within the design life of nuclear power plants, has a long manufacturing cycle, is expensive, and takes a long time to replace. Reserve an appropriate amount of strategic spare parts can reduce equipment maintenance time, shorten the overhaul period for refueling, and reduce losses caused by downtime.

[0003] However, traditional methods for determining spare parts reserves often rely on empirical judgment and simple historical data analysis, which is difficult to adapt to the complex and changing operating environment of modern nuclear power plants. In addition, traditional methods often use a single historical data trend analysis when predicting spare parts demand, ignoring the randomness and uncertainty of spare parts consumption, thereby reducing the prediction accuracy, resulting in high inventory costs and low actual utilization, or insufficient inventory that affects emergency response capabilities. Summary of the invention

[0004] Based on this, it is necessary to provide a method and computer equipment for determining the spare parts reserve of a nuclear power plant that can accurately predict the reserve quantity of target spare parts for each nuclear power plant in a nuclear power plant group in the future period in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for determining the spare parts reserve of a nuclear power plant, comprising:

[0006] Determine, based on the spare part attribute information of the target spare parts of the nuclear power plant group, the number of effective installation locations and the effective reserve quantity of the target spare parts in the nuclear power plant group in a future period;

[0007] Determine, according to the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of the target spare part in the nuclear power plant group when the function value of the total cost function of the target spare part is minimized; wherein the total cost function is used to describe the cost generated by the target spare part during the life of the spare part;

[0008] Determining the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate;

[0009] According to the total reserve quantity and the reserve requirement of the nuclear power plant group, a target reserve quantity for the target spare part of each nuclear power plant in the nuclear power plant group in the future period is determined.

[0010] In a second aspect, the present application also provides a device for determining the spare parts reserve quantity of a nuclear power plant, comprising:

[0011] A first determination module is used to determine the number of effective installation locations and effective reserve quantity of the target spare parts in the nuclear power plant group in a future period according to the spare parts attribute information of the target spare parts in the nuclear power plant group;

[0012] A second determination module is used to determine, based on the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of the target spare part in the nuclear power plant group when the function value of the total cost function of the target spare part is minimized; wherein the total cost function is used to describe the cost generated by the target spare part during the life of the spare part;

[0013] A third determination module is used to determine the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate;

[0014] The reserve determination module is used to determine the target reserve quantity of the target spare part for each nuclear power plant in the nuclear power plant group in the future period according to the total reserve quantity and the reserve requirement of the nuclear power plant group.

[0015] In a third aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method for determining the spare parts reserve quantity of a nuclear power plant provided in the first aspect above is implemented.

[0016] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method for determining the spare parts reserve quantity of a nuclear power plant provided in the first aspect above.

[0017] In a fifth aspect, the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the method for determining the spare parts reserve quantity of a nuclear power plant provided in the first aspect above.

[0018] The above-mentioned method and computer equipment for determining the spare parts reserve quantity of a nuclear power plant take into account that the number of effective installation positions and the effective reserve quantity of target spare parts in a nuclear power plant group may not be fixed in the future period. Therefore, firstly, the accuracy of the determined number of effective installation positions and the effective reserve quantity is ensured based on the spare parts attribute information of the target spare parts in the nuclear power plant group; at the same time, combined with the number of effective installation positions and the effective reserve quantity, it is ensured that the determined reference reserve quantity of the target spare parts in the nuclear power plant group can minimize the total cost of the target spare parts and reduce the use cost of the target spare parts; further, based on the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, the accuracy of the determined total reserve quantity is ensured; finally, based on the total reserve quantity and the reserve requirements of the nuclear power plant group, the accuracy and applicability of the determined target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic flow chart of a method for determining the spare parts reserve quantity of a nuclear power plant in one embodiment;

[0021] Figure 2A A schematic diagram of a flow chart for determining the number of effective installation positions and the effective reserve amount in one embodiment;

[0022] Figure 2B A schematic diagram of the overhaul time and target spare parts replacement time of a nuclear power plant in one embodiment;

[0023] Figure 3 A schematic diagram of a flow chart for determining the number of effective installation positions and the effective reserve amount in another embodiment;

[0024] Figure 4A A schematic diagram of a flow chart for determining the number of valid installation positions in one embodiment;

[0025] Figure 4B A schematic diagram of the distribution of target spare parts in various nuclear power plants in one embodiment;

[0026] Figure 4C A schematic diagram of a matrix result of the number of effective installation positions in one embodiment;

[0027] Figure 4D A schematic diagram of the corresponding relationship between the continuous available time and the average number of effective installations in one embodiment;

[0028] Figure 5A A schematic diagram of a flow chart for determining an effective reserve quantity of a target spare part in one embodiment;

[0029] Figure 5B This is a schematic diagram of a warehouse difference quantity matrix result in one embodiment;

[0030] Figure 6 A schematic diagram of a flow chart for constructing a total cost function of a target spare part in one embodiment;

[0031] Figure 7 A schematic diagram of a flow chart for determining a reference reserve quantity of a target spare part in one embodiment;

[0032] Figure 8 A schematic diagram of a process for determining the total reserve quantity of target spare parts in a nuclear power plant group in one embodiment;

[0033] Fig. 9 A schematic flow chart of a method for determining the reserve quantity of spare parts for a nuclear power plant in another embodiment;

[0034] Fig.10 It is a structural block diagram of a device for determining the spare parts reserve quantity of a nuclear power plant in one embodiment;

[0035] Fig.11 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] Since some strategic spare parts in the nuclear power plant group need to be replaced regularly, that is, in order to avoid unexpected failures of on-site strategic spare parts, an active maintenance plan will be adopted to regularly replace the strategic spare parts installed on site, use the reserved strategic spare parts to replace the on-site equipment, return the replaced strategic spare parts to the factory for refurbishment and maintenance, and transport the strategic spare parts back to the nuclear power plant for storage after refurbishment for sudden failures or regular replacement needs. For active maintenance, the replaced strategic spare parts will be refurbished and used in a cycle, and this type of strategic spare parts is called regularly replaced circulating strategic spare parts. The number of valid installation positions and the reserve volume corresponding to conventional strategic spare parts will not change. Generally speaking, it is considered that the newly installed strategic spare parts on site are valid. Therefore, the newly replaced strategic spare parts on site do not consider the repeated failures within a certain period of time. Therefore, for the circulating strategic spare parts, due to the need for regular replacement, the number of valid installation positions and the effective reserve volume corresponding to them will change over time.

[0038] Based on this, the method for determining the spare parts reserve quantity of a nuclear power plant provided in the embodiment of the present application can be applied in an application environment for predicting the spare parts reserve quantity of each nuclear power plant in a nuclear power plant group. The method for determining the spare parts reserve quantity of a nuclear power plant provided in the embodiment of the present application can be executed by a computer device, which can be a server or a terminal with powerful computing capabilities.

[0039] In one embodiment, Figure 1 As shown, a method for determining the spare parts reserve of a nuclear power plant is provided, and the method is applied to a server as an example for explanation, and specifically includes the following steps:

[0040] S101, determining the number of effective installation positions and effective reserve quantity of target spare parts in a nuclear power plant group in a future period according to spare parts attribute information of the target spare parts in the nuclear power plant group.

[0041] Among them, a nuclear power plant cluster refers to a collection of multiple nuclear power plants that are geographically close to each other and together constitute a larger power generation system. A nuclear power plant cluster is usually composed of multiple nuclear power plants, each of which has independent power generation capabilities, but through coordinated operation and management, higher power generation efficiency and more stable power supply can be achieved. The target spare part can be any recyclable strategic spare part of the nuclear power plant cluster. The spare part attribute information characterizes the basic attributes of the target spare part, such as the service life, production date, overhaul time, etc. of the target spare part. The number of effective installation locations of the target spare part is the number of locations where all nuclear power plants in the nuclear power plant cluster have installed the target spare parts in the future period. The effective reserve of the target spare part is the number of usable target spare parts reserved by all nuclear power plants in the nuclear power plant cluster.

[0042] Optionally, based on the spare parts attribute information of the target spare parts of the nuclear power plant group, a maintenance outline for the target spare parts in the future period can be formulated for each nuclear power plant. Furthermore, based on the maintenance outline, a replacement plan for the target spare parts in the future period can be calculated for each nuclear power plant. Furthermore, based on the replacement plan, the number of effective installation locations and the effective reserve quantity of circulating spare parts can be calculated.

[0043] For example, if the target spare parts are actively replaced every 5 overhauls (18 months between each overhaul, equivalent to replacement every 90 months), the replaced circulating spare parts will be returned to the factory for inspection and renovation, and the renovation time is 7 months. Assume that the newly replaced strategic spare parts on site will not fail again within 6 months. Assume that the current time is the 0th month, Unit 1 is overhauled in the 7th month, and the strategic spare parts of Unit 1 are replaced. Therefore, between the 7th and 12th months, the effective installation quantity of Unit 1 is 0 (it is assumed that the replaced strategic spare parts will not fail again within 6 months). Between the 7th and 13th months, the number of reserved inventory is 0 (the original 1 inventory of the reserve has been installed in Unit 1 in the 7th month, and the spare parts originally installed in Unit 1 have been returned to the factory for maintenance. The renovation cycle is 7 months, and there are no spare parts replaced in the warehouse during this period). Between the 13th and 15th months, the strategic spare parts returned to the factory for renovation have completed maintenance and arrived at the power plant warehouse, so the effective reserve quantity is restored to 1. In the 16th month, Unit 2 underwent an overhaul and replaced the strategic spare parts of Unit 2, so between the 16th and 21st months, the effective installed quantity of Unit 2 was 0. Between the 16th and 22nd months, the effective reserve quantity was 0.

[0044] S102, determining, based on the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of target spare parts in the nuclear power plant cluster when the function value of the total cost function of the target spare parts is minimized.

[0045] The total cost function is used to describe the cost of the target spare parts during their life cycle. The reference reserve is the reserve of the target spare parts in the nuclear power plant cluster when the function value of the total cost function of the target spare parts is the minimum.

[0046] Optionally, the determined number of effective installation locations and effective reserve quantity can be substituted into the total cost function of the target spare parts, and the total cost function can be solved based on a preset optimization algorithm to obtain the reference reserve quantity of the target spare parts in the nuclear power plant group when the function value of the total cost function is minimized.

[0047] S103, determining the total reserve quantity of the target spare parts in the nuclear power plant cluster according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate.

[0048] Among them, the guarantee rate of target spare parts is the probability that the number of target spare parts in stock can meet the needs of each nuclear power plant.

[0049] Optionally, for target spare parts, a reserve quantity prediction model can be constructed based on the Poisson distribution model and according to the reference reserve quantity of the target spare parts and the number of effective installation positions; further, the target protection rate is substituted into the reserve quantity prediction model so that the reserve quantity prediction model outputs the reserve quantity of the target spare parts in the nuclear power plant group while meeting the target protection rate, as the total reserve quantity of the target spare parts in the nuclear power plant group.

[0050] S104, determining the target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period according to the total reserve quantity and the reserve requirement of the nuclear power plant group.

[0051] Among them, the reserve requirements for nuclear power plant groups include mandatory requirements for all nuclear power plants to reserve target spare parts and non-mandatory requirements for all nuclear power plants to reserve target spare parts.

[0052] Optionally, if the reserve requirement of the nuclear power plant group is to force all nuclear power plants to reserve target spare parts, the total reserve can be divided equally according to the number of nuclear power plants, that is, the total reserve is divided by the number of nuclear power plants, and the obtained value is used as the target reserve for target spare parts for each nuclear power plant in the nuclear power plant group in the future period.

[0053] Optionally, if the reserve requirements of the nuclear power plant group do not require all nuclear power plants to reserve target spare parts, the spare parts reserve situation of each nuclear power plant can be comprehensively considered, and the total reserve quantity can be allocated first to nuclear power plants with sufficient reserve space, or first to nuclear power plants with a greater demand for target spare parts.

[0054] Optionally, in order to ensure the accuracy of the target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period, for any nuclear power plant, the number of spare parts used by the nuclear power plant during its life span can be calculated, which consists of the number of unexpected replacements and the expected replacements of the target spare parts. The unexpected replacement quantity can be calculated using the following formula (1):

[0055]

[0056] in, is the number of effective installation locations of nuclear power plant i at the kth moment; is the average number of effective installation locations of nuclear power plant i; δ is the annual failure probability.

[0057] The expected replacement quantity is the expected total replacement quantity of the target spare part during its lifespan. Specifically, the expected replacement quantity can be calculated using the following formula (2):

[0058]

[0059] in, is the requisition quantity of nuclear power plant i at the k-th moment.

[0060] Furthermore, based on the unanticipated replacement quantity and the anticipated replacement quantity, the average annual usage quantity of each nuclear power plant during the spare part life cycle can be calculated, specifically as shown in the following formula (3):

[0061]

[0062] where u (i) is the average annual usage quantity of nuclear power plant i for the target spare part during the spare part life cycle.

[0063] Furthermore, based on the average annual usage quantity of each nuclear power plant during the spare part life cycle, the average annual usage quantity matrix of each nuclear power plant can be constructed.

[0064] Exemplarily, if the target spare part is installed and used in 6 nuclear power plants, and the current installed quantity is 26 (the installed quantities in nuclear power plants 1, 2, 3, 4, 5, and 6 are 6, 6, 4, 6, 2, and 2 respectively), the average annual usage quantity of each nuclear power plant is calculated using the above formula (3). Taking nuclear power plant 1 as an example, the average effective installed position quantity is 5.25, the unanticipated replacement quantity during the spare part life cycle is 6.615, and the anticipated replacement quantity during the life cycle is 14. Therefore, its average annual usage quantity during the spare part life cycle is 0.687 ((6.615 + 14) / 30). Similarly, the average annual usage quantities of other nuclear power plants can be calculated, and the average annual usage quantity matrix of each nuclear power plant is constructed as U = [0.687, 0.689, 0.511, 0.785, 0.241, 0.271].

[0065] Furthermore, if the reserve requirement of the nuclear power plant group is a mandatory requirement for all nuclear power plants to reserve the target spare part, the target reserve quantity of each nuclear power plant in the nuclear power plant group for the target spare part in the future period can be determined through the following steps.

[0066] Step 104(1).1: Read the total reserve quantity P1 of the target spare part in the nuclear power plant group. Let the number of nuclear power plants using this target spare part be N, initialize and set the nuclear power plant layer storage quantity matrix P (1 row and N columns), and initialize and set the value p i = 0;

[0067] Step 104(1).2: Select the allocation plan:

[0068] Step 104(1).2.1: If P1 < N is satisfied and allocation is not possible, feedback that the value of the total storage quantity P1 of the nuclear power plant group is incorrect, and jump to Step 104(1).4;

[0069] Step 104(1).2.2: If P1=N, the target reserve quantity of the target spare part in each nuclear power plant is p i =1, jump to step 104(1).5;

[0070] Step 104(1).2.3: If P1>N, execute step 104(1).3;

[0071] Step 104(1).3: Based on the target spare parts future annual average usage quantity matrix U in each nuclear power plant, calculate the allocation plan:

[0072] Step 104(1).3.1: Construct the allocation matrix Z (1 row and N columns), let (where u i Equivalent to u in the above formula (3) (i) );

[0073] Step 104(1).3.2: Traverse each nuclear power plant in the nuclear power plant group. If z i ≤1, then set the target reserve p of nuclear power plant i i =1, execute P1=P1-1, z i =0; if z i >1, then initialize the setting p i =1, execute P1=P1-1, z i =z i -1; after traversing the nuclear power plant, execute

[0074] Step 104(1).3.3: Traverse the nuclear power plants. If z i ≥1, then execute p i =p i +int(z i ), P1=P1-int(z i ), z i =z i -int(z i ), where int(z i ) represents the extraction of real number z i integer value; if z i <1, no action is performed;

[0075] Step 104(1).3.4: If P1<1, jump to step 104(1).5; if P1≥1, traverse the nuclear power plants and obtain the nuclear power plant with the largest Z value, set it as nuclear power plant j, and execute p i =p i +1, P1=P1-1; if z i >1, execute z i =z i -1; otherwise execute zi =0;

[0076] Step 104(1).3.5: If P1≥1, jump to step 104(1).3.4; otherwise, jump to step 104(1).5;

[0077] Step 104(1).4: Outputting the total reserve quantity of the target spare parts in the nuclear power plant group is incorrect. The total reserve quantity should be greater than the number of nuclear power plants. End.

[0078] Step 104(1).5: Output the target reserve quantity p of target spare parts in each nuclear power plant i ,Finish.

[0079] Optionally, if the reserve requirement of the nuclear power plant group is not to require all nuclear power plants to reserve target spare parts, the target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period can be determined by the following steps.

[0080] Step 104(2).1: Read the total reserve quantity P1 of the target spare part in the nuclear power plant group, set the number of nuclear power plants using the target spare part to N, initialize the nuclear power plant layer storage quantity matrix P (1 row and N columns), and initialize the value p in the nuclear power plant layer storage quantity matrix P i =0;

[0081] Step 104(2).2: Based on the average annual usage matrix U of each nuclear power plant, select an allocation scheme:

[0082] Step 104(2).2.1: Construct the allocation matrix Z (1 row and N columns), let (where u i Equivalent to u in the above formula (3) (i) );

[0083] Step 104(2).2.2: Traverse the nuclear power plants. If z i ≥1, then execute p i =p i +int(z i ), P1=P1-int(z i ), z i =z i -int(z i ); if z i <1, no action is performed;

[0084] Step 104(2).2.3: If P1<1, jump to step 104(2).3; if P1≥1, traverse the nuclear power plants and obtain the nuclear power plant with the largest Z value, set it as nuclear power plant j, and execute p i =p i +1, P1=P1-1; if zi >1, execute z i =z i -1; otherwise execute z i =0;

[0085] Step 104(2).2.4: If P1≥1, jump to step 104(2).2.3; otherwise, jump to step 104(2).3;

[0086] Step 104(2).3: Output the target reserve quantity p of target spare parts in each nuclear power plant i ,Finish.

[0087] In the above-mentioned method for determining the spare parts reserve quantity of a nuclear power plant, it is taken into account that the number of effective installation positions and the effective reserve quantity of target spare parts in a nuclear power plant group may not be fixed in the future period. Therefore, firstly, the accuracy of the determined number of effective installation positions and the effective reserve quantity is ensured based on the spare parts attribute information of the target spare parts in the nuclear power plant group; at the same time, combined with the number of effective installation positions and the effective reserve quantity, it is ensured that the determined reference reserve quantity of the target spare parts in the nuclear power plant group can minimize the total cost of the target spare parts and reduce the use cost of the target spare parts; further, based on the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, the accuracy of the determined total reserve quantity is ensured; finally, based on the total reserve quantity and the reserve requirements of the nuclear power plant group, the accuracy and applicability of the determined target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period are ensured.

[0088] Optionally, in one embodiment, Figure 2A As shown, a method for determining the number of effective installation positions and effective reserve quantity of a target spare part is provided, which specifically includes the following steps:

[0089] S201, determining spare parts maintenance plan information for the target spare parts of the nuclear power plant group in a future period for each nuclear power plant in the nuclear power plant group according to spare parts attribute information of the target spare parts of the nuclear power plant group.

[0090] The spare parts maintenance plan information represents the maintenance quantity, maintenance time, and maintenance frequency of the target spare parts in the future period.

[0091] Optionally, based on the spare parts attribute information of the target spare parts of the nuclear power plant group, the time, number of times and other information of each nuclear power plant's maintenance of the target spare parts in the future period can be analyzed, and a spare parts maintenance plan for the target spare parts in the future period can be formulated for each nuclear power plant to obtain the spare parts maintenance plan information for the target spare parts of each nuclear power plant in the future period.

[0092] In addition, in order to ensure that the determined spare parts maintenance plan information conforms to the actual situation of each nuclear power plant, the spare parts maintenance plan information for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period can also be determined in combination with the usage of the target spare parts and the spare parts attribute information of the target spare parts of each nuclear power plant.

[0093] S202, determining spare parts replacement plan information for target spare parts of each nuclear power plant in the future period according to spare parts maintenance plan information for target spare parts of each nuclear power plant in the future period.

[0094] The spare parts replacement plan information for target spare parts of each nuclear power plant in the future period represents the plan of the nuclear power plant to replace the target spare parts in the future period, including but not limited to the quantity, time and location of the target spare parts to be replaced.

[0095] Optionally, for any nuclear power plant, the specific maintenance status of the target spare parts for maintenance of the nuclear power plant can be analyzed based on the spare parts maintenance plan information for the target spare parts in the future period of the nuclear power plant to determine whether the target spare parts that need to be repaired need to be replaced, and then determine the spare parts replacement plan information for the target spare parts of the nuclear power plant in the future period.

[0096] For example, a nuclear power plant consists of 6 units, and the overhaul interval of each unit is about 18 months (based on the overhaul plan of the plant group, in general, the overhaul interval for mature units is between 17 and 19 months). Each unit is installed with target spare parts, and its regular replacement cycle is 8C (8 overhaul intervals, about 144 months). The overhaul time of the nuclear power plant and the target spare parts replacement time are as follows: Figure 2B As shown. Figure 2B In the table, the horizontal axis represents the year. If the current time is 2024, then 1 on the horizontal axis represents 2025, 2 on the horizontal axis represents 2026, and so on. The vertical axis represents the month. 1 on the vertical axis represents January, 2 on the vertical axis represents February, and so on. The nuclear power plant has units that start overhaul in January, March, and April 2025. Figure 2B The horizontal axis is 1, and the vertical axis is 1, 3, and 4. The position is marked with a "○ symbol", indicating that there is an overhaul at that time point. Based on the overhaul start time of the nuclear power plant and the regular replacement cycle of the target spare parts, the replacement time of the target spare parts in the nuclear power plant is calculated. For example, by calculation, the target spare parts are replaced in April and October 2026. Figure 2B The positions with abscissa 2 and ordinates 4 and 10 are marked with a “+” sign.

[0097] S203, determining the number of effective installation locations and effective reserve quantity of target spare parts in the nuclear power plant cluster in the future period according to the replacement plan information of each spare part.

[0098] It can be understood that based on the spare parts replacement plan information of each nuclear power plant, the number and specific locations of the target spare parts that need to be replaced in each nuclear power plant can be statistically analyzed. Therefore, by combining all the nuclear power plants, the total number of target spare parts that need to be replaced in all nuclear power plants can be obtained. Therefore, the total number of target spare parts that need to be replaced in all nuclear power plants can be used as the number of effective installation positions, and the effective reserve amount can be guaranteed to be no less than the number of effective installation positions.

[0099] In this embodiment, by combining the spare parts maintenance plan information for target spare parts of each nuclear power plant in the future period, the actual situation of each nuclear power plant is fully considered, and the accuracy and practicality of the determined effective installation location number and effective reserve quantity of target spare parts in the nuclear power plant group in the future period are guaranteed.

[0100] In one embodiment, each spare part replacement plan information includes the spare part replacement cycle of the target spare part; on this basis, Figure 3 As shown, a method for determining the number of effective installation positions and the effective reserve amount is provided, which specifically includes the following steps:

[0101] S301, according to the spare parts replacement cycle of each nuclear power plant for the target spare parts in the future period, determine the replacement time distribution information of each nuclear power plant for the target spare parts in the future period.

[0102] The replacement time distribution information represents the distribution of the replacement time of the target spare part.

[0103] It can be understood that the spare parts replacement cycle for the target spare parts of each nuclear power plant in the future period represents the replacement cycle of the target spare parts at each location where the target spare parts are installed and used in each nuclear power plant. Furthermore, based on the spare parts installation time at each location and combined with the spare parts replacement cycle, the replacement time distribution information for the target spare parts of each nuclear power plant in the future period can be obtained.

[0104] S302, determining the spare parts collection matrix for target spare parts of each nuclear power plant in the future period according to the replacement time distribution information.

[0105] Among them, the spare parts collection matrix for target spare parts of each nuclear power plant in the future period represents the time when the nuclear power plant collects the target spare parts in the future period. In the embodiment of the present application, the spare parts collection matrix can be a matrix of c rows and 12 columns, wherein c represents the spare parts life of the target spare parts in years, and the 12 columns correspond to the corresponding months of collection. In the spare parts collection matrix, 0 represents that the nuclear power plant has no demand for target spare parts collection at that time, and 1 represents that the nuclear power plant has a demand for 1 target spare parts at that time. Correspondingly, if the demand for collection at a certain time is 2, 3, etc., then the value of the corresponding position is 2, 3, etc., and so on.

[0106] Optionally, for any nuclear power plant, the replacement time of the target spare parts can be determined based on the replacement time distribution information of the target spare parts in each nuclear power plant, and the spare parts requisition matrix for the target spare parts in the future period of the nuclear power plant can be constructed according to the construction rules of the spare parts requisition matrix.

[0107] For example, Figure 2B As an example, the spare parts requisition matrix corresponding to the nuclear power plant is as follows: 1 As shown:

[0108]

[0109] Among them, in D 1 In the example, the value of the 4th column of the 2nd row and the 10th column is 1, corresponding to Figure 2B The "+ sign" at the horizontal coordinate 2 and the vertical coordinates 4 and 10.

[0110] S303, determining the total requisition matrix for target spare parts of the nuclear power plant group in the future period according to each spare parts requisition matrix.

[0111] Usually, the target spare parts will be installed and used in multiple nuclear power plants. For this type of situation, after determining the spare parts requisition matrix of all nuclear power plants, it is necessary to summarize the spare parts requisition matrix of each nuclear power plant into the total requisition matrix of the nuclear power plant group. Specifically, the spare parts requisition matrices can be summed to obtain the total requisition matrix of the target spare parts for the nuclear power plant group in the future period.

[0112] For example, if the target spare parts are only used in two nuclear power plants, and the spare parts usage matrices corresponding to the two nuclear power plants are as follows: 1 and D 2 As shown. Further, D 1 and D 2 Adding them together, we can get the total usage matrix D of the target spare parts for the nuclear power plant group in the future period:

[0113]

[0114] S304, determining the number of effective installation locations and effective reserve quantity of target spare parts within the nuclear power plant group in the future period according to the general requisition matrix.

[0115] Optionally, in combination with the total requisition matrix, the requisition quantity and requisition time of the target spare parts for the nuclear power plant group in the future period can be obtained. Therefore, in combination with the requisition quantity of the target spare parts for the nuclear power plant group in the future period, the number of effective installation locations and effective reserve quantity of the target spare parts within the nuclear power plant group in the future period can be determined.

[0116] In this embodiment, by introducing the spare parts replacement cycle, the accuracy of the determined replacement time distribution information is guaranteed, and thus the accuracy of the determined spare parts requisition matrix is ​​guaranteed; in addition, by comprehensively considering the total requisition matrix for target spare parts of the nuclear power plant group in the future period, the accuracy of the effective installation location number and effective reserve quantity of the target spare parts in the nuclear power plant group in the future period is guaranteed.

[0117] Optionally, in one embodiment, Figure 4A As shown, a method for determining the number of effective installation positions is provided to refine the above S304, specifically comprising the following steps:

[0118] S401, obtaining the continuous availability duration and current installed quantity of the target spare part.

[0119] Among them, the continuous availability duration is the time from the installation of the target spare part to the repeated failure of the target spare part; the current installation quantity is the number of target spare parts that have been installed in the nuclear power plant group at the current time.

[0120] Optionally, usage information of the target spare parts used by all nuclear power plants during a historical period can be obtained, and based on the obtained usage information of all nuclear power plants, the historical continuous availability duration of each target spare part can be determined. Furthermore, the average of the historical continuous availability durations of all target spare parts can be used as the continuous availability duration of the target spare parts.

[0121] In addition, the sum of the quantities of target spare parts installed in various nuclear power plants may be used as the current installed quantity of the target spare parts.

[0122] S402, determining the installation quantity matrix of the target spare parts in the future period according to the continuous availability time and the total use matrix.

[0123] Among them, the installation quantity matrix of target spare parts in future time periods represents the total installation quantity of target spare parts in the nuclear power plant group at different times in future time periods. In the embodiment of the present application, the numerical value in the installation quantity matrix represents the installation quantity without considering repeated failures.

[0124] Optionally, the installation quantity matrix is ​​initialized first. In the embodiment of the present application, it is assumed that the installation quantity matrix is ​​G, and the initialization matrix G is a matrix in which the values ​​of 1 row and 12c columns are all 0, and the values ​​in the installation quantity matrix G are g 1 ,g 2 ,…,g 12c .

[0125] From the analysis in the above embodiment, it can be seen that the general use matrix D is a matrix with c rows and 12 columns. First, the general use matrix D is converted into a matrix F with 1 row and 12c columns, and the value in the matrix F is f 1 ,f 2 ,…,f12c . Further, the installation quantity matrix G is updated by traversing the matrix F. Specifically, the update process is shown in the following flow:

[0126] Step 402.1: Initialize the i-th value in the matrix F, setting i=1;

[0127] Step 402.2: If f is satisfied 1 >0, execute step 402.2.1; otherwise, jump to step 402.3;

[0128] Step 402.2.1: Initialize j, set j=0;

[0129] Step 402.2.2: If i+j≤12c, execute g i+j =g i+j +f 1 , jump to step 402.2.3; if i+j>12c, jump to step 402.3;

[0130] Step 402.2.3: Execute j=j+1, if j≤w 1 , then jump to step 402.2.2; if j>w 1 , then jump to step 402.3; (w 1 Continuous availability duration)

[0131] Step 402.3: execute i=i+1. If i≤12c is satisfied, jump to step 402.2; otherwise, output the initialization matrix G.

[0132] S403, determining the number of effective installation locations for target spare parts within the nuclear power plant cluster in the future period according to the installation quantity matrix and the current installation quantity.

[0133] Optionally, the current installation quantity is converted into a matrix of 1 row and 12c columns, and the difference between the converted matrix and the installation quantity matrix is ​​used as a matrix containing the number of valid installation positions. Furthermore, based on the matrix containing the number of valid installation positions, the number of valid installation positions for target spare parts within the nuclear power plant group in the future period is determined.

[0134] Exemplarily, the matrix M containing the number of valid installation positions can be calculated by the following formula (8):

[0135] M=m 1 ×IG (8)

[0136] Among them, m 1 is the current installation quantity; I is the identity matrix of 1 row and 12c columns; G is the installation quantity matrix.

[0137] Exemplarily, the target spare parts are installed and used in 6 nuclear power plants, with a total installation quantity of 26 (the installation quantities in Nuclear Power Plant 1, Nuclear Power Plant 2, Nuclear Power Plant 3, Nuclear Power Plant 4, Nuclear Power Plant 5, and Nuclear Power Plant 6 are 6, 6, 4, 6, 2, and 2 respectively), the replacement cycle of the target spare parts is 6C, and the continuous availability time is set to 18 months.

[0138] The distribution of target spare parts in each nuclear power plant is as follows: Figure 4B As shown, Figure 4B (g) in the figure is the total distribution of all nuclear power plants. The installation quantity matrix G calculated based on S402 is as follows: Figure 4C As shown (not considering the repeated failure number curve). The matrix result of the number of effective installation positions calculated based on S403 is as follows Figure 4C Shown (effective installation quantity curve).

[0139] In the above example, the continuous usage duration is set to 18 months. Figure 4C It can be obtained that the average number of effective installation positions is 22.7. The continuous use time setting value is inversely proportional to the average number of effective installation positions. When the continuous use time setting value is larger, the average number of effective installation positions is smaller. The corresponding relationship is as follows: Figure 4D As shown, the horizontal axis is the time range of continuous availability, and the vertical axis is the average number of effective installations.

[0140] In this embodiment, by introducing the installation quantity matrix and comprehensively considering the installation quantity matrix and the current installation quantity, the accuracy and rationality of the number of effective installation positions of target spare parts in the nuclear power plant group in the future period are guaranteed.

[0141] Optionally, in one embodiment, Figure 5A As shown, a method for determining the effective reserve amount of a target spare part is provided, which refines the above S304 and specifically includes the following steps:

[0142] S501, obtaining a preset maintenance time, a continuous usable time, and a current reserve quantity of a target spare part.

[0143] The preset maintenance time is the time required for returning the preset target spare parts to the factory for repair.

[0144] Optionally, the usage information of the target spare parts used by all nuclear power plants in the historical period can be obtained, and the historical continuous availability time of each target spare part can be determined based on the usage information of all nuclear power plants, and further, the average of the historical continuous availability time of all target spare parts can be used as the continuous availability time of the target spare part. In addition, the sum of the number of target spare parts installed by each nuclear power plant can be used as the current installation number of the target spare parts.

[0145] Correspondingly, the maintenance information of the target spare parts maintained by all nuclear power plants during the historical period can also be obtained, and the historical maintenance time of each target spare part can be determined based on the maintenance information of all nuclear power plants obtained. Furthermore, the average of the historical maintenance time of all target spare parts is used as the preset maintenance time of the target spare part.

[0146] S502, determining the storage difference quantity matrix of the target spare parts in the future period according to the preset maintenance time, continuous availability time and the total requisition matrix.

[0147] Among them, the storage difference quantity matrix represents the storage situation of the target spare parts in the nuclear power plant group. It can be understood that there are several reserves that have been returned to the factory for refurbishment and are not included in the effective reserve quantity.

[0148] Optionally, a storage difference quantity matrix is ​​first constructed. In the embodiment of the present application, it is assumed that the storage difference quantity matrix is ​​H, and the storage difference quantity matrix H is a matrix in which the values ​​of 1 row and 12c columns are all 0, and the values ​​in the storage difference quantity matrix H are h 1 ,h 2 ,…,h 12c .

[0149] From the analysis in the above embodiment, it can be seen that the general use matrix D is a matrix with c rows and 12 columns. First, the general use matrix D is converted into a matrix F with 1 row and 12c columns, and the value in the matrix F is f 1 ,f 2 ,…,f 12c . Further, the storage difference quantity matrix H is updated by traversing the matrix F. Specifically, the update process is shown in the following flow:

[0150] Step 502.1: Initialize the i-th value in the matrix F, setting i=1;

[0151] Step 502.2: If f is satisfied 1 >0, execute step 502.2.1; otherwise, jump to step 502.3;

[0152] Step 502.2.1: Initialize j, set j=0;

[0153] Step 502.2.2: If i+j≤12c, execute h i+j =h i+j +f 1 , jump to step 502.2.3; if i+j>12c, jump to step 502.3;

[0154] Step 502.2.3: Execute j=j+1, if j≤w 2 , then jump to step 502.2.2; if j>w 1, then jump to step 502.3; (w 2 The preset maintenance time)

[0155] Step 502.3: execute i=i+1. If i≤12c is satisfied, jump to step 502.2; otherwise, output the initialization matrix G.

[0156] S503, determining the effective reserve quantity of target spare parts in the nuclear power plant group in the future period according to the storage difference quantity matrix and the current reserve quantity.

[0157] Optionally, the current reserve quantity is converted into a matrix of 1 row and 12c columns, and the difference between the converted matrix and the storage difference quantity matrix is ​​used as the matrix containing the effective reserve quantity. Further, based on the matrix containing the effective reserve quantity, the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period is determined.

[0158] For example, the matrix S containing the effective reserve can be calculated by the following formula (9):

[0159] S=s 1 ×IH (9)

[0160] Among them, s 1 is the current installation quantity; I is the identity matrix of 1 row and 12c columns; H is the warehouse difference quantity matrix.

[0161] Exemplarily, the target spare parts are installed and used in 6 nuclear power plants, the current reserve quantity is 8, the replacement cycle of the target spare parts is 6C, and the preset maintenance time setting value is 6 months.

[0162] The distribution of target spare parts in each nuclear power plant is as follows: Figure 4B As shown, Figure 4B (g) in the figure is the total distribution of all nuclear power plants. The storage difference quantity matrix H calculated based on S502 is as follows: Figure 5B As shown in (reserve quantity difference curve). The matrix S including the effective reserve quantity calculated based on S503 is as follows Figure 5B Shown (effective reserve quantity curve).

[0163] In this embodiment, by introducing the preset maintenance time, continuous availability time and current reserve quantity of the target spare parts, it is equivalent to comprehensively considering the usage time and maintenance time of the target spare parts, thereby ensuring the accuracy and rationality of the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period.

[0164] In one embodiment, Figure 6 As shown, a method for constructing a total cost function of a target spare part is provided, which specifically includes the following steps:

[0165] S601, constructing a spare parts power generation loss cost function according to the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within a preset time period.

[0166] The spare parts failure information is information that characterizes the failure of the target spare parts. For example, the spare parts failure information includes but is not limited to the amount of power generation loss, the number of failed equipment, the failure time, etc. The spare parts power generation loss cost function characterizes the power generation loss of the target spare parts during the spare parts life. The preset time period is the procurement cycle of the target spare parts.

[0167] Optionally, if the number of faulty equipment is greater than the number of spare parts in reserve within a period of time, the faulty equipment on site cannot be replaced, and the site cannot generate electricity as normal, which will cause power generation losses. Therefore, it is necessary to construct a spare parts power generation loss cost function that can characterize the power generation loss of the target spare parts.

[0168] Optionally, in an embodiment of the present application, according to the construction model of the spare parts power generation loss cost function, the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within a preset time period can be input into the construction model of the spare parts power generation loss cost function, and the spare parts power generation loss cost function output by the construction model can be obtained.

[0169] In the embodiment of the present application, the power generation loss function of the target spare parts in the procurement cycle can also be calculated based on the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts in the preset period, that is, the expected power generation loss of the target equipment in the procurement cycle is characterized. The amount of power generation loss is related to the number of equipment failures and the time of failure. Assuming that the amount of power generation loss of equipment during the procurement cycle is r, if only one equipment failure occurs in the nuclear power plant group equipment during the procurement cycle, and the equipment failure time is 50% of the procurement cycle, then the amount of power generation loss of the nuclear power plant group is (1-50%)*r; if two equipment failures occur in the nuclear power plant group equipment during the procurement cycle, and the equipment failure times are 25% and 75% of the procurement cycle respectively, then the amount of power generation loss of the nuclear power plant group is (1-25%)*r+(1-75%)*r; if three equipment failures occur in the nuclear power plant group equipment during the procurement cycle, and the equipment failure times are 25%, 50%, and 75% of the procurement cycle respectively, then the amount of power generation loss of the nuclear power plant group is (1-25%)*r+(1-50%)*r+(1-75%)*r.

[0170] Normally, the failure time of the target spare parts is completely random, that is, the failure probability is the same at any time point in the procurement cycle, that is, it conforms to the uniform distribution. It can be calculated that if one device fails, its expected failure time is 0.5 times the procurement cycle, that is, E 1(1) = 0.5; if two devices fail, their expected failure times are 0.33 and 0.67 times the procurement cycle, respectively, that is, E 2 (1) = 0.33 and E 2 (2) = 0.67; if three equipment failures occur, their expected failure times are 0.25, 0.5, and 0.75 times the procurement cycle, respectively, that is, E 3 (1) = 0.25, E 3 (2) = 0.5 and E 3 (3) = 0.75; if 4 equipment failures occur, their expected failure times are 0.2, 0.4, 0.6, and 0.8 times the procurement cycle, respectively, that is, E A (1) = 0.2, E 4 (2) = 0.4, E 4 (3) = 0.6 and E 4 (4) = 0.8. Therefore, the expected failure time calculation process of the jth device in the case of i device failures can be calculated as shown in the following formula (10):

[0171]

[0172] Furthermore, the power generation loss function of the target spare parts during the procurement cycle is expressed as follows:

[0173]

[0174] Among them, m is the variable of the number of effective installation locations; s is the variable of the effective reserve; λ is the expected failure number, that is, the number of equipment expected to fail with the target spare part within the preset period; r is the amount of power generation loss of the target spare part within the procurement cycle. Both λ and r are spare part failure information.

[0175] Furthermore, based on the power generation loss function of the target spare parts during the procurement cycle, the monthly power generation loss function of the target spare parts can be calculated by linear conversion. If the procurement cycle of the target spare parts is t, the calculation formula for the monthly power generation loss amount of the target spare parts is shown in the following formula (12):

[0176]

[0177] Finally, based on the monthly power generation loss function of the target spare parts, the power generation loss amount during the equipment life can be converted into the power generation loss amount during the equipment life by using the discount rate method. The annual discount rate can be set to α, and the spare parts life of the target spare parts can be set to c. The current month is the 0th month, so the power generation loss amount of the 1st month is converted to the power generation loss amount of the 0th month. The power generation loss amount in the second month converted to the power generation loss amount in the 0th month is The power generation loss amount in the third month converted to the power generation loss amount in the 0th month is The power generation loss amount in month k is converted to the power generation loss amount in month 0: Therefore, the spare parts power generation loss cost function of the target spare parts during the spare parts life can be expressed by the following formula (13):

[0178]

[0179] S602: Construct a spare parts procurement cost function based on the initial reserve quantity and value information of the target spare parts.

[0180] Among them, the initial reserve quantity of the target spare parts is the quantity of the target spare parts reserved by the nuclear power plant group at the initial moment; the value information represents the purchase price of the target spare parts. In the embodiment of the present application, the value information includes but is not limited to the purchase unit price of the target spare parts.

[0181] Optionally, the product of the initial reserve quantity of the target spare parts and the purchase unit price in the value information can be used as the spare parts purchase cost function. Specifically, the spare parts purchase cost function can be expressed by the following formula (14):

[0182] F 4 =S×q 1 (14)

[0183] Among them, F 4 represents the spare parts procurement cost function; S is the initial reserve quantity of the target spare parts; q 1 The purchase price of the target spare part.

[0184] S603: construct a spare parts storage cost function according to the effective reserve quantity variable, the storage cost information of the target spare parts and the spare parts lifespan.

[0185] Among them, the storage cost information of the target spare part represents the cost of storing the target spare part during the spare part life cycle of the target spare part; in this embodiment of the application, the storage cost information includes but is not limited to storage fees and annual discount rate, etc.

[0186] Optionally, the storage cost during the life of the spare parts can be calculated based on the number of target spare parts in reserve. Usually, the target spare parts are large in size and require the construction of a dedicated warehouse that maintains the corresponding temperature and humidity requirements for storing the target spare parts. Therefore, it is necessary to convert the storage cost of each target spare part. Specifically, the process of constructing the spare parts storage cost function based on the effective reserve variable, the storage cost information of the target spare parts and the spare parts life can be expressed by the following formula (15):

[0187]

[0188] Among them, F 5represents the spare parts storage cost function; s represents the effective reserve quantity variable; q 2 is the storage cost; α is the annual discount rate.

[0189] S604: construct a spare parts maintenance cost function according to the effective reserve quantity variable, the maintenance cost information of the target spare parts and the spare parts lifespan.

[0190] Among them, the maintenance cost information of the target spare part represents the cost for maintaining the target spare part; in the embodiment of the present application, the maintenance cost information includes but is not limited to the annual maintenance cost and annual discount rate of each target spare part.

[0191] Optionally, the maintenance cost during the life of the spare parts can be calculated based on the number of strategic spare parts in reserve. Usually, when the target spare parts are stored in the warehouse, they need to be regularly maintained to ensure the effectiveness of the target spare parts in reserve, so the maintenance cost of the strategic spare parts needs to be converted. Specifically, based on the effective reserve variable, the maintenance cost information of the target spare parts and the life of the spare parts, the spare parts maintenance cost function can be expressed by the following formula (16):

[0192]

[0193] Among them, f 6 represents the spare parts maintenance cost function; s represents the effective reserve variable; q 3 is the maintenance cost; α is the annual discount rate.

[0194] S605 , determining a total cost function of the target spare part according to the sum of the spare part procurement cost function, the spare part storage cost function, the spare part maintenance cost function and the spare part power generation loss cost function.

[0195] Optionally, the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function can be used as the total cost function of the target spare parts. In addition, in order to ensure the accuracy of the determined total cost function and the flexibility of the determination process, the weights of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function can be calculated respectively according to their importance, and the total weight coefficient can be calculated based on the calculated weights, and the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function can be multiplied by the total weight coefficient as the total cost function of the target spare parts.

[0196] For example, taking the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function as the total cost function of the target spare parts, the constructed total cost function is shown in the following formula (17):

[0197] F=F 3 +F 4 +F 5 +F 6 (17)

[0198] Where F represents the total cost function.

[0199] Furthermore, by substituting the above formulas (13)-(16) into formula (17), we can obtain formula (18):

[0200]

[0201]

[0202] Furthermore, the introduction Simplifying the above formula (18), we get:

[0203]

[0204] Among them, δ is the annual failure probability of the target spare part; m is the variable of the number of effective installation positions; and t is the procurement cycle of the target spare part (days).

[0205] In this embodiment, by comprehensively considering the total cost of purchasing, warehousing, maintenance and power generation loss costs of the target spare parts, it is ensured that the constructed total cost function can accurately describe the cost generated by the target spare parts during their life cycle.

[0206] Optionally, in one embodiment, Figure 7 As shown, a method for determining a reference reserve quantity of a target spare part is provided to refine the above S103, and specifically includes the following steps:

[0207] S701, updating the total cost function according to the number of effective installation positions and the effective reserve quantity to obtain an updated total cost function.

[0208] Optionally, the number of effective installation positions and the effective reserve quantity may be substituted into the effective installation position number variable and the effective reserve quantity variable in formula (19) respectively to update the total cost function to obtain an updated total cost function.

[0209] For example, the target spare parts are installed and used in 6 nuclear power plants, the current installed number is 26, the replacement cycle of the target spare parts is 6C, the continuous availability time is set to 18 months, the preset maintenance time is set to 6 months, the spare parts life is 30 years, the purchase unit price is 10 million yuan, the storage cost is 100,000 yuan, the maintenance cost is 200,000 yuan, the procurement cycle is 730 days, the annual failure probability of a single device is 4.2%, the single-day power generation income of a single unit is 3.66 million yuan, and the annual discount rate is 8%.

[0210] Based on the method of the above embodiment, the matrix M containing the number of effective installation positions and the matrix S containing the effective reserve quantity are calculated, thereby obtaining the number of effective installation positions m in the kth month. k and effective reserve s k , substitute it into formula (19) to calculate the relationship between the effective reserve quantity and cost of the target strategic spare parts.

[0211] S702, taking the minimum function value of the updated total cost function as the goal, solving the function of the updated total cost function to obtain the reference reserve quantity of the target spare parts in the nuclear power plant group.

[0212] Optionally, an optimization algorithm may be used to solve the function of the updated total cost function with the goal of minimizing the function value of the updated total cost function to obtain a reference reserve quantity of target spare parts in the nuclear power plant cluster.

[0213] In this embodiment, the total cost function is updated according to the number of effective installation positions and the effective reserve quantity to obtain an updated total cost function, thereby ensuring that the updated total cost function is more in line with the actual situation, and further ensuring the accuracy and rationality of the reference reserve quantity calculated according to the updated total cost function.

[0214] Optionally, in one embodiment, Figure 8 As shown, a method for determining the total reserve of target spare parts in a nuclear power plant group is provided to refine the above S104, specifically comprising the following steps:

[0215] S801, determining the expected number of failures of the target spare part in a future period according to the number of valid installation positions and the failure probability of the target spare part.

[0216] The expected failure quantity is the number of target spare parts predicted to fail within a preset period (which may be a future period), and the failure probability is the probability of failure of a preset target spare part.

[0217] Optionally, according to the number of effective installation positions and failure probability of the target spare part, the process of determining the expected number of failures of the target spare part in the future period can be expressed by the following formula (20):

[0218]

[0219] Among them, λ is the expected number of failures; δ is the failure probability, which can be the annual failure probability; and t is the procurement cycle of the target spare parts.

[0220] S802: Construct a failure probability distribution function of the target spare part in a future period according to the expected number of failures.

[0221] Among them, the failure probability distribution function represents the failure probability of the target spare parts in the future period.

[0222] Optionally, Poisson distribution refers to the specific probability of an event occurring within a certain period of time, which is a discrete probability distribution commonly used in statistics and probability. Therefore, based on Poisson distribution and the expected number of failures, the failure probability distribution function of the target spare parts in the future period can be constructed, as shown in the following formula (21):

[0223]

[0224] Where p(i) represents the probability of failure of i target spare parts.

[0225] S803, determining a reference guarantee rate of the target spare part according to the failure probability distribution function and the reference reserve quantity.

[0226] The reference guarantee rate is the guarantee rate when the reserve quantity of the target spare parts is the reference reserve quantity.

[0227] Alternatively, the probability of out-of-stock under reference reserve conditions can be expressed by the following formula (22):

[0228]

[0229] in, For reference reserve.

[0230] It can be obtained that the guarantee rate when the reserve inventory is the reference reserve quantity can be expressed by the following formula (23):

[0231]

[0232] S804: Determine the total reserve quantity of target spare parts in the nuclear power plant group according to the reference protection rate, the target protection rate and the reference reserve quantity.

[0233] Optionally, if the reference guarantee rate is greater than or equal to the target guarantee rate, the reference reserve quantity is used as the total reserve quantity of the target spare parts in the nuclear power plant group. If the reference guarantee rate is less than the target guarantee rate, the sum of the reference reserve quantity and the preset value is used as the new reference reserve quantity, and based on the new reference reserve quantity, the operation of determining the reference guarantee rate of the target spare parts according to the failure probability distribution function and the reference reserve quantity is returned to execute until the obtained reference guarantee rate is greater than or equal to the target guarantee rate. The preset value is 1.

[0234] Exemplarily, when the reference reserve quantity of the target spare parts is 8, the total cost at this time is the smallest. In the case of 8 reserves, the reference guarantee rate can be obtained as 99.77%. If the target guarantee rate requirement set by the user is 99.5%, the reference reserve quantity of 8 is 99.77%, which meets the target guarantee rate requirement (99.77%>99.5%), so the total reserve quantity is 8. If the target guarantee rate requirement set by the user is 99.9%, the reference reserve quantity of 8 cannot meet the target guarantee rate requirement (99.77%<99.9%), so it is necessary to increase the reference reserve quantity from 8 to 9, and the calculated reference guarantee level is 99.99%, which meets the target guarantee rate requirement (99.99%>99.9%), so the total reserve quantity is 9.

[0235] In this embodiment, by introducing the expected number of failures of target spare parts in the future period, the failure conditions of target spare parts in the future period are fully considered, thereby ensuring the accuracy and rationality of the total reserve of target spare parts in the determined nuclear power plant group.

[0236] Fig. 9 FIG. 1 is a flow chart of a method for determining the spare parts reserve quantity of a nuclear power plant in another embodiment. Based on the above embodiment, this embodiment provides an optional example of a method for determining the spare parts reserve quantity of a nuclear power plant. Fig. 9 The specific implementation process is as follows:

[0237] S901, according to spare part attribute information of a target spare part of a nuclear power plant group, determining spare part maintenance plan information for the target spare part of each nuclear power plant in the nuclear power plant group in a future period.

[0238] S902, determining spare parts replacement plan information for target spare parts of each nuclear power plant in the future period according to spare parts maintenance plan information for target spare parts of each nuclear power plant in the future period.

[0239] S903, determining the replacement time distribution information of the target spare parts of each nuclear power plant in the future period according to the spare parts replacement cycle in each spare parts replacement plan information.

[0240] S904, determining the spare parts requisition matrix for the target spare parts of each nuclear power plant in the future period according to the replacement time distribution information.

[0241] S905, determining the total requisition matrix for target spare parts of the nuclear power plant group in the future period according to each spare parts requisition matrix.

[0242] S906, obtaining the continuous availability duration and current installed quantity of the target spare part.

[0243] The continuous availability duration is the duration from the installation of the target spare part to the repeated failure of the target spare part.

[0244] S907, determining the installation quantity matrix of the target spare parts in the future period according to the continuous availability time and the total use matrix.

[0245] S908, determining the number of effective installation locations for the target spare parts within the nuclear power plant cluster in the future period according to the installation quantity matrix and the current installation quantity.

[0246] S909, obtaining the preset maintenance time, continuous availability time and current reserve quantity of the target spare part.

[0247] S910, determining the storage difference quantity matrix of the target spare parts in the future period according to the preset maintenance time, continuous availability time and the total use matrix.

[0248] S911, determine the effective reserve quantity of target spare parts in the nuclear power plant group in the future period based on the storage difference quantity matrix and the current reserve quantity.

[0249] S912, determining the reference reserve quantity of the target spare parts in the nuclear power plant cluster when the function value of the total cost function of the target spare parts is minimized according to the number of effective installation positions and the effective reserve quantity.

[0250] The total cost function is used to describe the cost of the target spare part during its life cycle.

[0251] Optionally, the total cost function is updated according to the number of effective installation positions and the effective reserve quantity to obtain an updated total cost function; with the minimum function value of the updated total cost function as the goal, the function of the updated total cost function is solved to obtain the reference reserve quantity of the target spare parts in the nuclear power plant group.

[0252] Optionally, a spare parts power generation loss cost function is constructed based on the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within a preset time period; a spare parts procurement cost function is constructed based on the initial reserve quantity and value information of the target spare parts; a spare parts storage cost function is constructed based on the effective reserve quantity variable, the storage cost information of the target spare parts and the spare parts life span; a spare parts maintenance cost function is constructed based on the effective reserve quantity variable, the maintenance cost information of the target spare parts and the spare parts life span; and the total cost function of the target spare parts is determined based on the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function.

[0253] S913, determining the total reserve quantity of the target spare parts in the nuclear power plant cluster according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate.

[0254] Optionally, based on the number of effective installation positions and failure probability of the target spare parts, determine the expected number of failures of the target spare parts in a future time period; based on the expected number of failures, construct a failure probability distribution function of the target spare parts in a future time period; based on the failure probability distribution function and reference reserve quantity, determine a reference protection rate for the target spare parts; based on the reference protection rate, the target protection rate and the reference reserve quantity, determine the total reserve quantity of the target spare parts in the nuclear power plant cluster.

[0255] Optionally, if the reference protection ratio is greater than or equal to the target protection ratio, the reference reserve quantity is used as the total reserve quantity of target spare parts in the nuclear power plant group; if the reference protection ratio is less than the target protection ratio, the sum of the reference reserve quantity and the preset value is used as the new reference reserve quantity, and based on the new reference reserve quantity, the operation of determining the reference protection ratio of the target spare parts according to the failure probability distribution function and the reference reserve quantity is returned to be executed.

[0256] S914, determining the target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period according to the total reserve quantity and the reserve requirement of the nuclear power plant group.

[0257] The specific process of the above S901-S914 can refer to the description of the above method embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0258] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0259] Based on the same inventive concept, the embodiment of the present application also provides a device for determining the spare parts reserve quantity of a nuclear power plant for implementing the method for determining the spare parts reserve quantity of a nuclear power plant involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the embodiments of one or more devices for determining the spare parts reserve quantity of a nuclear power plant provided below can refer to the limitations of the method for determining the spare parts reserve quantity of a nuclear power plant above, and will not be repeated here.

[0260] In an exemplary embodiment, Fig.10 As shown, a device 1000 for determining the spare parts reserve quantity of a nuclear power plant is provided, comprising: a first determination module 1010, a second determination module 1020, a third determination module 1030 and a reserve determination module 1040, wherein:

[0261] The first determination module 1010 is used to determine the number of effective installation locations and effective reserve quantity of the target spare parts in the nuclear power plant group in the future period according to the spare parts attribute information of the target spare parts in the nuclear power plant group.

[0262] The second determination module 1020 is used to determine the reference reserve quantity of the target spare parts in the nuclear power plant group when the function value of the total cost function of the target spare parts is minimized based on the number of effective installation positions and the effective reserve quantity; wherein the total cost function is used to describe the cost generated by the target spare parts during the spare parts life cycle.

[0263] The third determination module 1030 is used to determine the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate.

[0264] The reserve determination module 1040 is used to determine the target reserve quantity of the target spare parts for each nuclear power plant in the nuclear power plant group in the future period according to the total reserve quantity and the reserve requirement of the nuclear power plant group.

[0265] In one embodiment, the first determining module 1010 includes:

[0266] The maintenance determination unit is used to determine spare parts maintenance plan information for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period according to the spare parts attribute information of the target spare parts of the nuclear power plant group.

[0267] The replacement determination unit is used to determine the spare parts replacement plan information for the target spare parts of each nuclear power plant in the future period according to the spare parts maintenance plan information for the target spare parts of each nuclear power plant in the future period.

[0268] The parameter determination unit is used to determine the number of effective installation positions and effective reserve quantity of target spare parts in the nuclear power plant group in the future period according to the replacement plan information of each spare part.

[0269] In one embodiment, each spare part replacement plan information includes a spare part replacement cycle of a target spare part; and the parameter determination unit includes:

[0270] The distribution determination subunit is used to determine the replacement time distribution information of the target spare parts of each nuclear power plant in the future period according to the spare parts replacement cycle of each nuclear power plant for the target spare parts in the future period.

[0271] The first matrix determination subunit is used to determine the spare parts requisition matrix for target spare parts of each nuclear power plant in the future period according to each replacement time distribution information.

[0272] The second matrix determination subunit is used to determine the total requisition matrix for target spare parts of the nuclear power plant group in the future period according to each spare parts requisition matrix.

[0273] The parameter determination subunit is used to determine the number of effective installation locations and effective reserve quantity of target spare parts in the nuclear power plant group in the future period according to the general requisition matrix.

[0274] In one embodiment, the parameter determination subunit is specifically used for:

[0275] Obtain the continuous availability duration and current installation quantity of the target spare parts; wherein the continuous availability duration is the time from the installation of the target spare parts to the repeated failure of the target spare parts; determine the installation quantity matrix of the target spare parts in the future time period based on the continuous availability duration and the total use matrix; determine the number of effective installation locations for the target spare parts in the nuclear power plant cluster in the future time period based on the installation quantity matrix and the current installation quantity.

[0276] In one embodiment, the parameter determination subunit is further configured to:

[0277] Obtain the preset maintenance time, continuous availability time and current reserve quantity of the target spare parts; determine the storage difference quantity matrix of the target spare parts in the future period based on the preset maintenance time, continuous availability time and the total requisition matrix; determine the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period based on the storage difference quantity matrix and the current reserve quantity.

[0278] In one embodiment, the apparatus 1000 for determining the spare parts reserve quantity of a nuclear power plant is further used for:

[0279] According to the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within the preset time period, the spare parts power generation loss cost function is constructed; according to the initial reserve quantity and value information of the target spare parts, the spare parts procurement cost function is constructed; according to the effective reserve quantity variable, the storage cost information of the target spare parts and the spare parts life span, the spare parts storage cost function is constructed; according to the effective reserve quantity variable, the maintenance cost information of the target spare parts and the spare parts life span, the spare parts maintenance cost function is constructed; according to the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function, the total cost function of the target spare parts is determined.

[0280] In one embodiment, the second determining module 1020 is specifically configured to:

[0281] According to the number of effective installation positions and the effective reserve quantity, the total cost function is updated to obtain an updated total cost function; with the minimum function value of the updated total cost function as the goal, the function of the updated total cost function is solved to obtain the reference reserve quantity of the target spare parts in the nuclear power plant group.

[0282] In one embodiment, the third determination module 1030 includes:

[0283] The quantity determination unit is used to determine the expected failure quantity of the target spare part in a future period according to the number of effective installation positions and failure probability of the target spare part.

[0284] The function building unit is used to build a failure probability distribution function of the target spare part in a future period according to the expected failure quantity.

[0285] The guarantee rate determination unit is used to determine the reference guarantee rate of the target spare parts according to the failure probability distribution function and the reference reserve quantity.

[0286] The reserve quantity determination unit is used to determine the total reserve quantity of target spare parts in the nuclear power plant group according to the reference protection rate, the target protection rate and the reference reserve quantity.

[0287] In one embodiment, the reserve amount determination unit is specifically configured to:

[0288] If the reference protection rate is greater than or equal to the target protection rate, the reference reserve quantity is used as the total reserve quantity of the target spare parts in the nuclear power plant group; if the reference protection rate is less than the target protection rate, the sum of the reference reserve quantity and the preset value is used as the new reference reserve quantity, and based on the new reference reserve quantity, the operation of determining the reference protection rate of the target spare parts according to the failure probability distribution function and the reference reserve quantity is returned to be executed.

[0289] Each module in the above-mentioned apparatus for determining the reserve quantity of spare parts in a nuclear power plant can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0290] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Fig.11 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. 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, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining the spare parts reserve of a nuclear power plant is implemented.

[0291] Those skilled in the art will understand that Fig.11 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0292] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the steps of the method for determining the spare parts reserve quantity of a nuclear power plant provided in the above embodiment are implemented.

[0293] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for determining the spare parts reserve quantity of a nuclear power plant provided in the above embodiment are implemented.

[0294] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, implements the steps of the method for determining the spare parts reserve quantity of a nuclear power plant provided in the above embodiment.

[0295] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0296] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and 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-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0297] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0298] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining the spare parts reserve of a nuclear power plant, characterized in that: The method comprises: Determine, based on the spare part attribute information of the target spare parts of the nuclear power plant group, the number of effective installation locations and the effective reserve quantity of the target spare parts in the nuclear power plant group in a future period; Determine, according to the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of the target spare part in the nuclear power plant group when the function value of the total cost function of the target spare part is minimized; wherein the total cost function is used to describe the cost generated by the target spare part during the life of the spare part; Determining the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate; According to the total reserve quantity and the reserve requirement of the nuclear power plant group, a target reserve quantity for the target spare part of each nuclear power plant in the nuclear power plant group in the future period is determined.

2. The method according to claim 1, characterized in that The determining, based on the spare part attribute information of the target spare part of the nuclear power plant group, the number of effective installation locations and the effective reserve quantity of the target spare part in the nuclear power plant group in the future period includes: Determining spare parts maintenance plan information for the target spare parts of the nuclear power plant group at each nuclear power plant in the nuclear power plant group in the future period; Determining spare parts replacement plan information for the target spare parts in the future period at each of the nuclear power plants according to the spare parts maintenance plan information for the target spare parts in the future period at each of the nuclear power plants; According to each of the spare parts replacement plan information, the number of effective installation locations and the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period are determined.

3. The method according to claim 2, characterized in that Each spare parts replacement plan information includes a spare parts replacement cycle of the target spare parts; Determining the number of effective installation locations and effective reserve quantity of the target spare parts in the nuclear power plant group in the future period according to each of the spare parts replacement plan information includes: Determining replacement time distribution information of the target spare parts of each of the nuclear power plants in the future period according to the spare parts replacement cycle of each of the nuclear power plants for the target spare parts in the future period; Determining, according to each of the replacement time distribution information, a spare parts requisition matrix for the target spare parts in the future period for each of the nuclear power plants; Determining, according to each of the spare parts requisition matrices, a total requisition matrix for the target spare parts of the nuclear power plant group in the future period; According to the total requisition matrix, the number of effective installation locations and effective reserve quantity of the target spare parts in the nuclear power plant group in the future period are determined.

4. The method according to claim 3, characterized in that According to the total requisition matrix, the number of effective installation locations of the target spare parts in the nuclear power plant group in the future period is determined, including: Obtaining the continuous availability duration and the current installed quantity of the target spare part; wherein the continuous availability duration is the duration from the installation of the target spare part to the repeated failure of the target spare part; Determine, according to the continuous availability duration and the total usage matrix, the installation quantity matrix of the target spare parts in the future period; The number of valid installation locations for the target spare parts within the nuclear power plant cluster in a future period is determined according to the installation quantity matrix and the current installation quantity.

5. The method according to claim 3, characterized in that: Determining the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period according to the total requisition matrix includes: Obtaining the preset maintenance time, continuous availability time and current reserve quantity of the target spare parts; Determine the storage difference quantity matrix of the target spare parts in the future period according to the preset maintenance time, the continuous availability time and the total use matrix; The effective reserve quantity of the target spare parts in the nuclear power plant group in the future period is determined according to the storage difference quantity matrix and the current reserve quantity.

6. The method according to claim 1, characterized in that The total cost function of the target spare part is constructed in the following way: Constructing a spare parts power generation loss cost function according to the effective installation position quantity variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within a preset period of time; Constructing a spare parts procurement cost function based on the initial reserve quantity and value information of the target spare parts; Constructing a spare parts storage cost function according to the effective reserve quantity variable, the storage cost information of the target spare parts and the spare parts lifespan; Constructing a spare parts maintenance cost function according to the effective reserve quantity variable, the maintenance cost information of the target spare parts and the spare parts lifespan; The total cost function of the target spare part is determined according to the sum of the spare parts procurement cost function, the spare parts storage cost function, the spare parts maintenance cost function and the spare parts power generation loss cost function.

7. The method according to claim 1, characterized in that The step of determining, based on the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of the target spare parts in the nuclear power plant group when the function value of the total cost function of the target spare parts is minimized comprises: updating the total cost function according to the number of effective installation positions and the effective reserve amount to obtain an updated total cost function; Taking the minimum function value of the updated total cost function as the goal, the function of the updated total cost function is solved to obtain the reference reserve quantity of the target spare parts in the nuclear power plant group.

8. The method according to claim 1, characterized in that Determining the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate includes: Determining the expected number of failures of the target spare part in the future period according to the number of valid installation positions and the failure probability of the target spare part; Constructing a failure probability distribution function of the target spare part in the future period according to the expected number of failures; Determining a reference guarantee rate of the target spare part according to the failure probability distribution function and the reference reserve amount; The total reserve quantity of the target spare parts in the nuclear power plant group is determined according to the reference security rate, the target security rate and the reference reserve quantity.

9. The method according to claim 8, characterized in that Determining the total reserve quantity of the target spare parts in the nuclear power plant group according to the reference guarantee rate, the target guarantee rate and the reference reserve quantity includes: If the reference guarantee rate is greater than or equal to the target guarantee rate, the reference reserve quantity is used as the total reserve quantity of the target spare parts in the nuclear power plant group; If the reference guarantee rate is less than the target guarantee rate, the sum of the reference reserve amount and the preset value is used as the new reference reserve amount, and based on the new reference reserve amount, the operation of determining the reference guarantee rate of the target spare part according to the failure probability distribution function and the reference reserve amount is returned to be executed.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

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