Method and device for determining reserve of spare parts of nuclear power plant, equipment, medium and product

Abstract

The invention relates to a nuclear power plant spare part reserve determination method and device, equipment, a medium and a product. The method comprises the following steps: determining the average replacement frequency of a target spare part in an expected life period according to the expected life period and the spare part replacement period of the target spare part of the nuclear power plant group; according to the average replacement frequency, the lifetime influence parameter and the expected lifetime of the target spare parts and the current installation number of the target spare parts in the nuclear power plant group, determining the effective installation position number and the effective reserve of the target spare parts in the nuclear power plant group in the future time period; according to the number of the effective installation positions, the effective reserve and the total cost function, determining the target reserve of each nuclear power plant in the nuclear power plant group in the future time period for the target spare parts; wherein the total cost function is used for describing the cost generated by the target spare part in the expected life 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, device, equipment, medium and product 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. Due to the above characteristics of strategic spare parts, the inventory parameter setting principles of conventional spare parts cannot be used directly to determine the reserve quantity of strategic spare parts.

[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, device, equipment, medium and product for determining the spare parts reserve of a nuclear power plant, which can accurately predict the reserve quantity of target spare parts for each nuclear power plant in the 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] Determining, based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the average number of replacement times of the target spare parts within the expected life span;

[0007] 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 average number of replacements, life influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group;

[0008] The 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

[0009] In one embodiment, the life-cycle influencing parameters include continuous availability duration and preset maintenance duration; wherein the continuous availability duration is the duration from the installation of the target spare part to the repeated occurrence of failure of the target spare part;

[0010] The determining, based on the average number of replacements, life-influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in 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, comprises:

[0011] Determining a reference life span of the target spare part according to the product of the expected life span and the first time unit parameter;

[0012] Determine the number of valid installation locations of the target spare part according to the current installation number, the continuous usable time, the average number of replacement times and the reference life span of the target spare part;

[0013] The effective reserve quantity of the target spare part is determined according to the current installed quantity, the average replacement times, the preset maintenance duration and the reference life span of the target spare part.

[0014] In one embodiment, determining the number of valid installation locations of the target spare part according to the current installation number, the continuous usable time, the average number of replacement times and the reference life span of the target spare part includes:

[0015] The product of the reference life span, the current installation quantity, the continuous usable time and the average replacement times of the target spare part is used as the number of invalid installation positions of the target spare part;

[0016] The difference between the current installation quantity of the target spare part and the invalid installation position quantity is used as the valid installation position quantity of the target spare part.

[0017] In one embodiment, determining the effective reserve quantity of the target spare part according to the current installed quantity, the average number of replacement times, the preset maintenance time and the reference life of the target spare part includes:

[0018] Using the ratio between the preset maintenance time and the second time unit parameter as the reference maintenance time of the target spare part;

[0019] The product of the reference life span, the reference maintenance duration, the current installation quantity and the average replacement times of the target spare part is taken as the effective reserve quantity of the target spare part.

[0020] In one embodiment, the step of determining the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group includes:

[0021] Determining an intermediate parameter of the target spare part according to the product of the expected life span and the first time unit parameter;

[0022] The ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

[0023] In one embodiment, determining 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 number of effective installation positions, the effective reserve quantity and the total cost function includes:

[0024] Determine, according to 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;

[0025] 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;

[0026] 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.

[0027] In a second aspect, the present application also provides a device for determining the spare parts reserve quantity of a nuclear power plant, comprising:

[0028] A times determination module, used to determine the average number of times the target spare parts are replaced within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group;

[0029] a parameter determination module, for determining 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 average number of replacements, life-influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group;

[0030] A 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

[0031] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0032] Determining, based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the average number of replacement times of the target spare parts within the expected life span;

[0033] 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 average number of replacements, life influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group;

[0034] The 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

[0035] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0036] Determining, based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the average number of replacement times of the target spare parts within the expected life span;

[0037] 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 average number of replacements, life influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group;

[0038] The 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

[0039] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0040] Determining, based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the average number of replacement times of the target spare parts within the expected life span;

[0041] 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 average number of replacements, life influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group;

[0042] The 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

[0043] The above-mentioned method, device, equipment, medium and product for determining the spare parts reserve quantity of a nuclear power plant can accurately determine the average number of replacements of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group; further, by comprehensively considering the average number of replacements of the target spare parts, the life span influencing parameters and the expected life span, as well as the current number of installed target spare parts in the nuclear power plant group, the number of effective installation positions and the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period can be simply, conveniently and accurately determined, thereby reducing the calculation cost; finally, since the total cost function describes the cost incurred by the target spare parts during the expected life span, therefore, based on the number of effective installation positions, the effective reserve quantity and the total cost function, the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period can be accurately determined. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 A schematic flow chart of a method for determining the spare parts reserve quantity of a nuclear power plant in one embodiment;

[0046] Figure 2 A schematic diagram of a flow chart for determining the number of effective installation positions and the effective reserve amount in one embodiment;

[0047] Figure 3 A schematic diagram of a flow chart for determining the number of valid installation positions for a target spare part in one embodiment;

[0048] Figure 4 A schematic diagram of a flow chart for determining an effective reserve quantity of a target spare part in one embodiment;

[0049] Figure 5 A schematic diagram of a process for determining a target reserve amount of each nuclear power plant in one embodiment;

[0050] Fig. 6A A schematic diagram of power generation loss amount correction in one embodiment;

[0051] Figure 6BA schematic diagram of the correction of the amount of power generation loss in another embodiment;

[0052] Figure 7 A schematic flow chart of a method for determining the reserve quantity of spare parts for a nuclear power plant in another embodiment;

[0053] Figure 8 It is a structural block diagram of a device for determining the spare parts reserve quantity of a nuclear power plant in one embodiment;

[0054] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0055] 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.

[0056] 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.

[0057] 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:

[0058] S101, determining an average number of replacement times of target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of target spare parts of a nuclear power plant group.

[0059] 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 expected life span is the expected life span of the target spare part; the spare part replacement cycle is the period from installation to replacement of the target spare part; the average number of replacements represents the number of times the target spare part is replaced during the expected life span.

[0060] Optionally, the ratio between the expected life span of the target spare part and the spare part replacement cycle may be used as the average number of replacement times of the target spare part within the expected life span.

[0061] Optionally, considering that the expected life of the target spare part is generally in years, while the spare parts replacement cycle is generally in months, in order to ensure the unit consistency between the expected life and the spare parts replacement cycle, a time parameter can be introduced to synchronize the measurement units between the expected life and the spare parts replacement cycle. Specifically, the intermediate parameter of the target spare part can be determined based on the product between the expected life and the first time unit parameter; the ratio between the intermediate parameter and the spare parts replacement cycle is used as the average number of replacements of the target spare part within the expected life. Among them, the first time unit parameter is determined according to the measurement units of the expected life and the spare parts replacement cycle. If the units of the expected life and the spare parts replacement cycle are both in months, the first time unit parameter is 1; if the units of the expected life are both in years and the units of the spare parts replacement cycle are both in months, the first time unit parameter is 12.

[0062] For example, if the unit of expected life span is year and the unit of spare parts replacement cycle is month, the first time unit parameter is 12, and the average number of replacement times of the target spare parts within the expected life span can be expressed by the following formula (1):

[0063] (1)

[0064] in, is the average number of replacements of the target spare parts during their expected lifespan; is the expected life span; It is the spare parts replacement cycle.

[0065] S102, 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 based on the average number of replacements, life influencing parameters and expected life of the target spare parts, as well as the current number of installed target spare parts in the nuclear power plant cluster.

[0066] Among them, the life-cycle influencing parameters are parameters that affect the life of the target spare parts. In the embodiment of the present application, the life-cycle influencing parameters include but are not limited to the continuous availability time and the preset maintenance time; the continuous availability time is the time from the installation of the target spare parts to the repeated failure of the target spare parts; the preset maintenance time is the time taken for the preset target spare parts to be returned to the factory for maintenance. The number of effective installation locations for the target spare parts is the number of locations where the target spare parts are installed in all nuclear power plants in the nuclear power plant group in the future period. The effective reserve of the target spare parts is the number of usable target spare parts reserved by all nuclear power plants in the nuclear power plant group.

[0067] Optionally, a pre-constructed effective installation position quantity prediction model and an effective reserve quantity prediction model can be obtained, and the average replacement times, life influencing parameters and expected life of the target spare parts, as well as the current installation quantity of the target spare parts in the nuclear power plant group are respectively input into the effective installation position quantity prediction model and the effective reserve quantity prediction model, and the effective installation position quantity and effective reserve quantity of the target spare parts in the nuclear power plant group in the future period are respectively obtained.

[0068] S103, determining the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period according to the number of effective installation positions, the effective reserve quantity and the total cost function.

[0069] The total cost function is used to describe the cost incurred by the target spare parts during their expected lifespan.

[0070] Optionally, the total cost function of the target spare part needs to comprehensively consider the spare part power generation loss cost function, spare part procurement cost function, spare part storage cost function and spare part maintenance cost function of the target spare part.

[0071] Optionally, the power generation loss function of the target spare parts during the procurement cycle can be calculated based on the effective installation position number variable, the effective reserve quantity variable and the spare parts failure information of the target spare parts within a preset period of time, that is, the expected power generation loss of the target equipment during the procurement cycle. The power generation loss amount is related to the number of equipment failures and the time of failure. Assume that the power generation loss amount of the equipment during the procurement cycle is , if only one device fails during the procurement cycle of a nuclear power plant group, and the equipment failure occurs during 50% of the procurement cycle, the power generation loss of the nuclear power plant group is ; If two equipment failures occur in the nuclear power plant group equipment during the procurement cycle, and the equipment failure time is 25% and 75% of the procurement cycle respectively, the power generation loss amount of the nuclear power plant group is ; 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, the power generation loss amount of the nuclear power plant group is .

[0072] Normally, the failure time of the target spare parts is completely random, that is, the failure probability at any time point in the procurement cycle is the same, 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, ; If two devices fail, their expected failure times are 0.33 and 0.67 times the procurement cycle, respectively, that is and ; If three devices fail, their expected failure times are 0.25, 0.5, and 0.75 times the procurement cycle, respectively, that is, , and ; If 4 devices fail, their expected failure times are 0.2, 0.4, 0.6, and 0.8 times the purchase cycle, respectively, that is, , , and Therefore, it can be calculated that In the event of a device failure, The calculation process of the expected failure time of each device is shown in the following formula (2):

[0073] (2)

[0074] Furthermore, the power generation loss function of the target spare parts during the procurement cycle is expressed as follows:

[0075] (3)

[0076] in, is the variable for the number of valid installation positions; is the effective reserve variable; is the expected failure number, that is, the number of devices where the target spare part is expected to fail within a preset period of time; It is the amount of power generation loss of the target spare parts during the procurement cycle. and All of them are spare parts failure information.

[0077] 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. , then the calculation formula for the monthly power generation loss amount of the target spare parts is as shown in the following formula (4):

[0078] (4)

[0079] Finally, based on the monthly power loss function of the target spare parts, the power loss amount during the equipment life can be converted into the amount through the discount rate method. The annual discount rate can be , the expected life of the target spare part is The current month is the 0th month, so the power generation loss amount in the 1st month is converted to the power generation loss amount in the 0th month. ; The power generation loss amount in the second month is converted to the power generation loss amount in the 0th month: ; The power generation loss amount in the third month is converted to the power generation loss amount in the 0th month: ;No. The power generation loss amount of the month is converted to the power generation loss amount of the 0th month. Therefore, the spare parts power generation loss cost function of the target spare parts during the expected life span can be expressed by the following formula (5):

[0080] (5)

[0081] Optionally, a spare parts procurement cost function can be constructed based on the initial reserve quantity and value information of the target spare parts. The initial reserve quantity of the target spare parts is the number of 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.

[0082] 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 procurement cost function. Specifically, the spare parts procurement cost function can be expressed by the following formula (6):

[0083] (6)

[0084] in, represents the spare parts procurement cost function; is the initial reserve quantity of the target spare parts; The purchase price of the target spare part.

[0085] Optionally, a spare parts storage cost function can be constructed based on the effective reserve variable, the storage cost information of the target spare parts, and the expected lifespan. The storage cost information of the target spare parts represents the cost of storing the target spare parts within the expected lifespan of the target spare parts; in the embodiment of the present application, the storage cost information includes but is not limited to storage fees and annual discount rates.

[0086] Optionally, the storage cost within the expected life span 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 calculate the storage cost of each target spare part. Specifically, based on the effective reserve variable, the storage cost information of the target spare parts, and the expected life span, the process of constructing the spare parts storage cost function can be expressed by the following formula (7):

[0087] (7)

[0088] in, represents the spare parts storage cost function; represents the effective reserve variable; For storage costs; is the annual discount rate.

[0089] Optionally, a spare parts maintenance cost function is constructed based on the effective reserve variable, the maintenance cost information of the target spare parts, and the expected lifespan. The maintenance cost information of the target spare parts represents the cost of maintaining the target spare parts; 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.

[0090] Optionally, the maintenance cost within the expected life span 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 expected life span, the spare parts maintenance cost function can be expressed by the following formula (8):

[0091] (8)

[0092] in, represents the spare parts maintenance cost function; represents the effective reserve variable; For maintenance costs; is the annual discount rate.

[0093] Finally, the total cost function of the target spare parts can be 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. 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 the importance 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, and the total weight coefficient is 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 is multiplied by the total weight coefficient as the total cost function of the target spare parts.

[0094] For example, taking the sum of the spare parts procurement cost function, spare parts storage cost function, spare parts maintenance cost function and 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 (9):

[0095] (9)

[0096] in, represents the total cost function.

[0097] Furthermore, by substituting the above formulas (5)-(8) into formula (9), we can obtain formula (10):

[0098] (10)

[0099] Furthermore, the introduction , simplify the above formula (10) to obtain:

[0100] (11)

[0101] in, is the annual failure probability of the target spare parts; is the variable for the number of valid installation positions; is the procurement cycle (days) of the target spare parts.

[0102] Furthermore, the effective installation position quantity variable and the effective reserve quantity variable in the total cost function can be updated by using the effective installation position quantity and the effective reserve quantity, and the updated total cost function can be solved with the minimum function value of the updated total cost function as the goal, thereby obtaining the target reserve quantity for the target spare parts for each nuclear power plant in the nuclear power plant group in the future period.

[0103] In the above-mentioned method for determining the spare parts reserve quantity of a nuclear power plant, the average number of replacements of the target spare parts within the expected life span can be accurately determined based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group; further, by comprehensively considering the average number of replacements of the target spare parts, the life span influencing parameters and the expected life span, as well as the current number of installed target spare parts in the nuclear power plant group, the number of effective installation positions and the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period can be simply, conveniently and accurately determined, thereby reducing the calculation cost; finally, since the total cost function describes the cost incurred by the target spare parts during the expected life span, therefore, based on the number of effective installation positions, the effective reserve quantity and the total cost function, the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period can be accurately determined.

[0104] Optionally, the life cycle influencing parameters include continuous availability duration and preset maintenance duration; 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; in one embodiment, Figure 2 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:

[0105] S201, determining a reference life span of a target spare part according to the product of the expected life span and a first time unit parameter.

[0106] Similarly, considering that the units of the expected life span and the continuous availability duration may be different, a first time unit parameter is introduced. For example, if the first time unit parameter is 12, the reference life span of the target spare part can be expressed by the following formula (12):

[0107] (12)

[0108] in, For reference lifespan.

[0109] S202, determining the number of effective installation locations for target spare parts within a nuclear power plant cluster in a future period based on the current installed number, continuous availability, average number of replacements and reference life of the target spare parts.

[0110] Optionally, a pre-built effective installation position quantity calculation model can be obtained, and the current installation quantity, continuous availability time, average replacement times and reference life of the target spare part can be input into the effective installation position quantity calculation model, so that the effective installation position quantity calculation model can output the effective installation position quantity of the target spare part according to the set calculation logic.

[0111] S203, determining the effective reserve quantity of target spare parts in the nuclear power plant cluster in the future period according to the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare parts.

[0112] Optionally, a pre-built effective reserve quantity calculation model can be obtained, and the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare parts can be input into the effective reserve quantity calculation model, so that the effective reserve quantity calculation model can output the effective installation location quantity of the target spare parts according to the set calculation logic.

[0113] In this embodiment, by introducing the first time unit parameter, the consistency of the time units between the various parameters is ensured; at the same time, by introducing the continuous available time and the preset maintenance time, the accuracy of the determined effective installation position quantity and the effective reserve quantity are respectively ensured.

[0114] Optionally, in an exemplary embodiment, as Figure 3 As shown, a method for determining the number of effective installation positions of a target spare part is provided, which specifically includes the following steps:

[0115] S301, taking the product of the reference life of the target spare parts, the current installed quantity, the continuous available time and the average number of replacement times as the number of invalid installation positions of the target spare parts in the nuclear power plant group in the future period.

[0116] The number of invalid installation positions refers to installation positions whose functions are invalid.

[0117] Optionally, the product of the reference life of the target spare part, the current installed quantity, the continuous available time and the average number of replacement times can be used as the number of invalid installation positions of the target spare part, which can be specifically expressed by the following formula (13):

[0118] (13)

[0119] in, The number of invalid installation positions of the target spare part; is the current number of installations; The duration of continuous availability.

[0120] S302, taking the difference between the current installation quantity of the target spare parts and the number of invalid installation positions as the number of valid installation positions of the target spare parts in the nuclear power plant cluster in the future period.

[0121] Optionally, the difference between the current installation quantity of the target spare part and the number of invalid installation positions can be used as the number of valid installation positions of the target spare part, which can be specifically expressed by the following formula (14):

[0122] (14)

[0123] in, The number of valid installation locations for the target spare part.

[0124] In this embodiment, by introducing the number of invalid installation positions, full consideration is given to the installation positions of the nuclear power plant group that are functionally invalid in the future period, thereby ensuring the accuracy and rationality of the determined number of valid installation positions.

[0125] Optionally, in one embodiment, Figure 4 As shown, a method for determining the effective reserve amount of a target spare part is provided, which specifically includes the following steps:

[0126] S401: Taking the ratio between the preset maintenance time and the second time unit parameter as the reference maintenance time of the target spare part.

[0127] For the same reason, the unit of the preset maintenance time is generally day, which is the same as the expected life span. By introducing the second time unit parameter, the unit of the preset maintenance time is equivalent to month. Therefore, the second time unit parameter is generally set to 30.

[0128] Optionally, the ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare part, which can be specifically expressed by the following formula (15):

[0129] (15)

[0130] in, The reference maintenance time of the target spare parts; The preset maintenance time.

[0131] S402, taking the product of the reference life span, reference maintenance time, current installed quantity and average replacement times of the target spare parts as the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period.

[0132] Optionally, the product of the reference life span, reference maintenance time, current installed quantity and average replacement times of the target spare parts is used as the effective reserve of the target spare parts in the nuclear power plant group in the future period, which can be specifically expressed by the following formula (16):

[0133] (16)

[0134] in, It is the effective reserve quantity of target spare parts within the nuclear power plant group in the future period.

[0135] In this embodiment, by introducing the second time unit parameter, the consistency of the parameters involved in the time unit is guaranteed; at the same time, the maintenance time of the target spare parts is fully considered to ensure the accuracy and rationality of the determined effective reserve amount.

[0136] Optionally, in one embodiment, Figure 5 As shown, a method for determining the target reserve quantity of target spare parts for each nuclear power plant is provided, which specifically includes the following steps:

[0137] S501, determining, based on the number of effective installation positions and the effective reserve quantity, a reference reserve quantity of target spare parts in a nuclear power plant cluster when the function value of the total cost function of the target spare parts is minimized.

[0138] The reference reserve quantity is the 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.

[0139] 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.

[0140] In addition, for the above formula (5), since formula (5) describes the spare parts power generation loss cost function of the target spare parts during the expected life span, however, the calculation method of formula (5) requires a large number of parameters and the algorithm is complex. Therefore, the number of effective installation locations calculated by the above formula (14) can be ,replace Parameters in Formula (5) can be corrected to the following formula (17), specifically:

[0141] (17)

[0142] Based on formula (17), for each reserve value, the amount of spare parts power generation loss cost of the target spare parts during the expected life cycle will be calculated, thereby constructing a corresponding relationship between the effective reserve and the amount of spare parts power generation loss cost during the expected life cycle, as shown in the following formula (18):

[0143] (18)

[0144] in, is the effective reserve in formula (17) The calculation result with value 0, is the effective reserve in formula (17) The calculation result of taking value as 1, and so on, is the effective reserve in formula (17) The value is The calculation result of .

[0145] The effective reserve calculated by the above formula (16) is Split according to integer and decimal values, where the integer value is assigned to , the decimal places are assigned to ; If the calculated effective reserve is 0.8, then The value is 0, The value is 0.8. First, perform integer correction and move the value in the matrix of formula (18) to the right. When shifting to the right, the elements that exceed the number of matrix bits are directly removed, and the elements in the original position are used After that, the decimal place correction is performed. When the power generation loss amount is not When , let its power generation loss amount be , then the corrected power generation loss amount is The schematic diagram of the power generation loss amount correction is as follows: Fig. 6A To further demonstrate the correction relationship of the power generation loss amount, when the integer is When the value is 2, the schematic diagram of the power generation loss amount correction is as follows Figure 6B Based on the initial power generation loss amount, an integer correction is performed, that is, the calculation result is shifted two places to the right as a whole. At this time, the power generation loss amount when the reserve is 0, 1, and 2 is , the power generation loss amount when the reserve is 3 hours is ,reserve The amount of power generation loss per hour is ; After that, the decimal places are corrected, and the power generation loss amount when the reserve is 0, 1, and 2 is , the power generation loss amount when the reserve is 3 hours is , and this is used for calculation.

[0146] For example, the number of target spare parts installed on site The number of power generation reserves is 8. Based on formula (18), the corresponding relationship between the effective reserve and the amount of power generation loss is: (This is only for displaying the calculation process, not the actual loss amount), that is, the power generation loss amount with 0 reserves is 1024, and the power generation loss amount with 8 reserves is 4. If we calculate based on formula (16), we get is 1.2, that is The value is 1, The value is 0.2. After the integer correction, the corresponding relationship between the reserve quantity and the amount of power generation loss is: ; After the decimal point correction, the corresponding relationship between the reserve quantity and the amount of power generation loss is: Taking 4 reserves as an example, the power generation loss amount is 307 (0.2*512+0.8*256).

[0147] Furthermore, based on the above-mentioned correction process of the spare parts power generation loss cost function of the target spare parts within the expected life cycle, the spare parts power generation loss cost function is corrected and substituted into formula (10), and the total cost function is solved based on the preset optimization algorithm to obtain the reference reserve of the target spare parts in the nuclear power plant group when the function value of the total cost function is minimized.

[0148] S502, 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.

[0149] 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.

[0150] Optionally, the expected number of failures of the target spare parts in the future period can be determined based on the number of valid installation positions and the failure probability of the target spare parts. The expected number of failures is the number of target spare parts predicted to fail in a preset period (which can be a future period). The failure probability is the probability of failure of the preset target spare parts. Optionally, the process of determining the expected number of failures of the target spare parts in the future period based on the number of valid installation positions and the failure probability of the target spare parts can be expressed by the following formula (19):

[0151] (19)

[0152] in, is the expected number of failures; is the failure probability, which can be the annual failure probability; The procurement cycle of target spare parts.

[0153] Furthermore, the failure probability distribution function of the target spare parts in the future period can be constructed based on the expected number of failures. The failure probability distribution function characterizes the failure probability of the target spare parts in the future period. 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 the 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 (20):

[0154] (20)

[0155] in, Indicates occurrence The probability value of failure of each target spare part.

[0156] Further, according to the failure probability distribution function and the reference reserve quantity, the reference guarantee rate of the target spare parts is determined. The reference guarantee rate is the guarantee rate when the reserve quantity of the target spare parts is the reference reserve quantity. Optionally, the probability of out-of-stock under the reference reserve quantity can be expressed by the following formula (21):

[0157] (twenty one)

[0158] in, For reference reserve.

[0159] It can be obtained that the guarantee rate when the reserve inventory is the reference reserve quantity can be expressed by the following formula (22):

[0160] (twenty two)

[0161] Finally, the total reserve quantity of target spare parts in the nuclear power plant group is determined based on the reference guarantee rate, the target guarantee rate and the reference reserve quantity. 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 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 based on the failure probability distribution function and the reference reserve quantity is returned until the obtained reference guarantee rate is greater than or equal to the target guarantee rate. The preset value is 1.

[0162] Exemplarily, when the reference reserve quantity of the target spare parts is 8, the total cost is the lowest. In the case of 8 reserves, the reference guarantee rate can be 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.

[0163] S503, determining 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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 cycle can be calculated, which consists of the unexpected replacement quantity and expected replacement quantity of the target spare parts. The unexpected replacement quantity can be calculated using the following formula (23):

[0168] (twenty three)

[0169] in, For nuclear power plants In the The number of valid installation positions at the moment; For nuclear power plants The average number of valid installation locations; is the annual failure probability.

[0170] The expected replacement quantity is the expected total replacement quantity of the target spare part during its life span. Specifically, the expected replacement quantity can be calculated using the following formula (24):

[0171] (twenty four)

[0172] in, For nuclear power plants In the The quantity of goods used at the time.

[0173] Furthermore, based on the number of unexpected replacements and the number of expected replacements, the average annual usage of spare parts in each nuclear power plant during their life cycle can be calculated, as shown in the following formula (25):

[0174] (25)

[0175] in, For nuclear power plants The average annual usage quantity of the target spare part during its life cycle.

[0176] Furthermore, an average annual usage quantity matrix of each nuclear power plant can be constructed according to the average annual usage quantity of each nuclear power plant during the life of the spare parts.

[0177] For example, if the target spare parts are installed and used in 6 nuclear power plants, the current number of installations is 26 (the number of installations 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 is 6, 6, 4, 6, 2, and 2 respectively). The above formula (3) is used to calculate the average annual usage quantity of each nuclear power plant. Taking nuclear power plant 1 as an example, the average number of effective installation positions is 5.25, the number of unexpected replacements during the spare parts life is 6.615, and the expected number of replacements during the life is 14. Therefore, the average annual usage quantity during the spare parts life is 0.687 ((6.615+14) / 30). Similarly, the average annual usage quantity of other nuclear power plants can be calculated, and the average annual usage quantity matrix of each nuclear power plant can be constructed as follows: .

[0178] Furthermore, if the reserve requirement of the nuclear power plant group is to compulsorily require all nuclear power plants to reserve target spare parts, the target reserve quantity of the 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.

[0179] Step 503(1).1: Read the total reserve quantity of the target spare part in the nuclear power plant group , let the number of nuclear power plants using the target spare parts be Initialize the storage quantity matrix of the nuclear power plant layer (1 row Column), initialize and set the storage quantity matrix of nuclear power plant layer The value in ;

[0180] Step 503(1).2: Select allocation scheme:

[0181] Step 503(1).2.1: If , cannot be allocated, feedback the total storage value of the nuclear power plant group If there is an error, jump to step 503(1).4;

[0182] Step 503(1).2.2: If The target reserve quantity of the target spare parts in each nuclear power plant is , jump to step 503(1).5;

[0183] Step 503(1).2.3: If , execute step 503(1).3;

[0184] Step 503(1).3: Matrix of the average annual usage of target spare parts in each nuclear power plant in the future , calculate the allocation plan:

[0185] Step 503(1).3.1: Construct the allocation matrix (1 row Column), and (in, is equivalent to the above formula (3) );

[0186] Step 503(1).3.2: Traverse each nuclear power plant, if , then set up a nuclear power plant Target reserve ,implement , ;like , then initialize the settings ,implement , ; After traversing the nuclear power plant, execute ;

[0187] Step 503(1).3.3: Traverse the nuclear power plants. If , then execute , , ,in, Represents the extraction of real numbers The integer value of , no action is performed;

[0188] Step 503(1).3.4: If , jump to step 503(1).5; if , traverse the nuclear power plant and obtain Take the largest nuclear power plant and let it be the nuclear power plant ,implement , ;like ,implement ; Otherwise execute ;

[0189] Step 503(1).3.5: If , jump to step 503(1).3.4; otherwise jump to 503(1).5;

[0190] Step 503(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.

[0191] Step 503(1).5: Output the target reserve quantity of target spare parts in each nuclear power plant ,Finish.

[0192] 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.

[0193] Step 503(2).1: Read the total reserve quantity of the target spare part in the nuclear power plant group , let the number of nuclear power plants using the target spare parts be Initialize the storage quantity matrix of the nuclear power plant layer (1 row Column), initialize and set the storage quantity matrix of nuclear power plant layer The value in ;

[0194] Step 503(2).2: Based on the average annual usage matrix of each nuclear power plant , select the allocation scheme:

[0195] Step 503(2).2.1: Construct the allocation matrix (1 row Column), let (in, This is equivalent to the above formula (3). );

[0196] Step 503(2).2.2: Traverse the nuclear power plants. If , then execute , , ;like , no action is performed;

[0197] Step 503(2).2.3: If , jump to step 503(2).3; if , traverse the nuclear power plant and obtain Take the largest nuclear power plant and let it be the nuclear power plant ,implement , ;like ,implement ; Otherwise execute ;

[0198] Step 503(2).2.4: If , jump to step 503(2).2.3; otherwise jump to 503(2).3;

[0199] Step 503(2).3: Output the target reserve quantity of target spare parts in each nuclear power plant ,Finish.

[0200] In this embodiment, by introducing a reference reserve quantity and combining it with the number of effective installation positions and the target security rate, the accuracy of the determined total reserve quantity is ensured; further, by comprehensively considering the reserve requirements and total reserve quantity of the nuclear power plant group, the accuracy and feasibility of the target reserve quantity for target spare parts of each nuclear power plant is ensured.

[0201] Figure 7 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. Figure 7 The specific implementation process is as follows:

[0202] S701, determining an intermediate parameter of a target spare part according to the product of the expected life span and the first time unit parameter.

[0203] S702: Taking the ratio between the intermediate parameter and the spare part replacement cycle as the average number of replacement times of the target spare part within the expected life span.

[0204] S703: Determine a reference life span of the target spare part according to the product of the expected life span and the first time unit parameter.

[0205] S704: The product of the reference life span, the current installed quantity, the continuous usable time and the average number of replacement times of the target spare part is taken as the number of invalid installation positions of the target spare part.

[0206] S705: Taking the difference between the current installation quantity of the target spare part and the number of invalid installation positions as the number of valid installation positions of the target spare part.

[0207] S706: Using the ratio between the preset maintenance time and the second time unit parameter as the reference maintenance time of the target spare part.

[0208] S707: The product of the reference life span, the reference maintenance time, the current installation quantity and the average replacement times of the target spare part is taken as the effective reserve quantity of the target spare part.

[0209] S708, 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.

[0210] S709, 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.

[0211] S710, determining a target reserve quantity for target spare parts for each nuclear power plant in the nuclear power plant group in a future period according to the total reserve quantity and the reserve requirement of the nuclear power plant group.

[0212] The specific process of the above S701-S710 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.

[0213] 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.

[0214] 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.

[0215] In an exemplary embodiment, Figure 8 As shown, a device 800 for determining the spare parts reserve quantity of a nuclear power plant is provided, comprising: a number determination module 810, a parameter determination module 820 and a reserve determination module 830, wherein:

[0216] The number determination module 810 is used to determine the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group.

[0217] The parameter determination module 820 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 based on the average replacement times, life influencing parameters and expected life of the target spare parts, as well as the current installation quantity of the target spare parts in the nuclear power plant group.

[0218] The reserve determination module 830 is used to determine the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare parts during the expected life cycle.

[0219] The above-mentioned device for determining the spare parts reserve quantity of a nuclear power plant can accurately determine the average number of replacements of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group; further, by comprehensively considering the average number of replacements of the target spare parts, the life span influencing parameters and the expected life span, as well as the current number of installed target spare parts in the nuclear power plant group, the number of effective installation positions and the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period can be simply, conveniently and accurately determined, thereby reducing the calculation cost; finally, since the total cost function describes the cost generated by the target spare parts during the expected life span, therefore, based on the number of effective installation positions, the effective reserve quantity and the total cost function, the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period can be accurately determined.

[0220] In one embodiment, the number determination module 810 is specifically used to:

[0221] The intermediate parameter of the target spare part is determined according to the product of the expected life span and the first time unit parameter; the ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

[0222] In one embodiment, the life-cycle influencing parameters include continuous availability duration and preset maintenance duration; 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; the parameter determination module 820 includes:

[0223] The life span determination unit is used to determine the reference life span of the target spare part according to the product between the expected life span and the first time unit parameter.

[0224] The first determination unit is used to determine the number of effective installation positions of the target spare part according to the current installation quantity, continuous usable time, average replacement times and reference life of the target spare part.

[0225] The second determination unit is used to determine the effective reserve quantity of the target spare part according to the current installation quantity, average replacement times, preset maintenance time and reference life of the target spare part.

[0226] In one embodiment, the first determining unit is specifically configured to:

[0227] The product of the reference life of the target spare part, the current installation quantity, the continuous available time and the average replacement times is taken as the number of invalid installation positions of the target spare part; the difference between the current installation quantity of the target spare part and the number of invalid installation positions is taken as the number of valid installation positions of the target spare part.

[0228] In one embodiment, the second determining unit is specifically configured to:

[0229] The ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare parts; the product of the reference life of the target spare parts, the reference maintenance time, the current installation quantity and the average replacement times is used as the effective reserve quantity of the target spare parts.

[0230] In one embodiment, the reserve determination module 830 is specifically configured to:

[0231] Based on the number of effective installation positions and the effective reserve quantity, 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 reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, determine the total reserve quantity of the target spare parts in the nuclear power plant group; based on the total reserve quantity and the reserve requirements of the nuclear power plant group, 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.

[0232] 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.

[0233] 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. 9As 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.

[0234] Those skilled in the art will understand that Fig. 9 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.

[0235] 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 following steps are implemented:

[0236] According to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, determine the average number of replacement times of the target spare parts within the expected life span;

[0237] Determine the number of effective installation locations and effective reserve quantity of target spare parts in the nuclear power plant cluster in the future period based on the average replacement times, life influencing parameters and expected life of the target spare parts, as well as the current installed quantity of target spare parts in the nuclear power plant cluster;

[0238] The target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period is determined based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare parts during the expected life cycle.

[0239] In one embodiment, the life-cycle influencing parameters include a continuous availability duration and a preset maintenance duration; 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; when the processor executes the computer program to determine 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 according to the average number of replacements of the target spare parts, the life-cycle influencing parameters and the expected life, and the current number of installed target spare parts in the nuclear power plant group, the following steps are also implemented:

[0240] Determine the reference life of the target spare parts based on the product of the expected life and the first time unit parameter; determine the number of effective installation locations for the target spare parts based on the current installed quantity, continuous available time, average replacement times and reference life of the target spare parts; determine the effective reserve quantity of the target spare parts based on the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare parts.

[0241] In one embodiment, when the processor executes the computer program to determine the number of effective installation positions of the target spare part according to the current installation quantity, continuous usable time, average replacement times and reference life of the target spare part, the following steps are further implemented:

[0242] The product of the reference life of the target spare part, the current installation quantity, the continuous available time and the average replacement times is taken as the number of invalid installation positions of the target spare part; the difference between the current installation quantity of the target spare part and the number of invalid installation positions is taken as the number of valid installation positions of the target spare part.

[0243] In one embodiment, when the processor executes the computer program to determine the effective reserve quantity of the target spare part according to the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare part, the following steps are also implemented:

[0244] The ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare parts; the product of the reference life of the target spare parts, the reference maintenance time, the current installation quantity and the average replacement times is used as the effective reserve quantity of the target spare parts.

[0245] In one embodiment, when the processor executes the computer program to determine the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the processor further implements the following steps:

[0246] The intermediate parameter of the target spare part is determined according to the product of the expected life span and the first time unit parameter; the ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

[0247] In one embodiment, when the processor executes the computer program to determine the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period according to the number of effective installation positions, the effective reserve quantity and the total cost function, the following steps are also implemented:

[0248] Based on the number of effective installation positions and the effective reserve quantity, 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 reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, determine the total reserve quantity of the target spare parts in the nuclear power plant group; based on the total reserve quantity and the reserve requirements of the nuclear power plant group, 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.

[0249] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0250] According to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, determine the average number of replacement times of the target spare parts within the expected life span;

[0251] Determine the number of effective installation locations and effective reserve quantity of target spare parts in the nuclear power plant cluster in the future period based on the average replacement times, life influencing parameters and expected life of the target spare parts, as well as the current installed quantity of target spare parts in the nuclear power plant cluster;

[0252] The target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period is determined based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare parts during the expected life cycle.

[0253] In one embodiment, the life-cycle influencing parameters include a continuous availability duration and a preset maintenance duration; 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; when the processor executes the computer program to determine 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 according to the average number of replacements of the target spare parts, the life-cycle influencing parameters and the expected life, and the current number of installed target spare parts in the nuclear power plant group, the following steps are also implemented:

[0254] Determine the reference life of the target spare parts based on the product of the expected life and the first time unit parameter; determine the number of effective installation locations for the target spare parts based on the current installed quantity, continuous available time, average replacement times and reference life of the target spare parts; determine the effective reserve quantity of the target spare parts based on the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare parts.

[0255] In one embodiment, when the processor executes the computer program to determine the number of effective installation positions of the target spare part according to the current installation quantity, continuous usable time, average replacement times and reference life of the target spare part, the following steps are further implemented:

[0256] The product of the reference life of the target spare part, the current installation quantity, the continuous available time and the average replacement times is taken as the number of invalid installation positions of the target spare part; the difference between the current installation quantity of the target spare part and the number of invalid installation positions is taken as the number of valid installation positions of the target spare part.

[0257] In one embodiment, when the processor executes the computer program to determine the effective reserve quantity of the target spare part according to the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare part, the following steps are also implemented:

[0258] The ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare parts; the product of the reference life of the target spare parts, the reference maintenance time, the current installation quantity and the average replacement times is used as the effective reserve quantity of the target spare parts.

[0259] In one embodiment, when the processor executes the computer program to determine the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the processor further implements the following steps:

[0260] The intermediate parameter of the target spare part is determined according to the product of the expected life span and the first time unit parameter; the ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

[0261] In one embodiment, when the processor executes the computer program to determine the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period according to the number of effective installation positions, the effective reserve quantity and the total cost function, the following steps are also implemented:

[0262] Based on the number of effective installation positions and the effective reserve quantity, 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 reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, determine the total reserve quantity of the target spare parts in the nuclear power plant group; based on the total reserve quantity and the reserve requirements of the nuclear power plant group, 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.

[0263] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0264] According to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, determine the average number of replacement times of the target spare parts within the expected life span;

[0265] Determine the number of effective installation locations and effective reserve quantity of target spare parts in the nuclear power plant cluster in the future period based on the average replacement times, life influencing parameters and expected life of the target spare parts, as well as the current installed quantity of target spare parts in the nuclear power plant cluster;

[0266] The target reserve quantity of target spare parts for each nuclear power plant in the nuclear power plant group in the future period is determined based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare parts during the expected life cycle.

[0267] In one embodiment, the life-cycle influencing parameters include a continuous availability duration and a preset maintenance duration; 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; when the processor executes the computer program to determine 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 according to the average number of replacements of the target spare parts, the life-cycle influencing parameters and the expected life, and the current number of installed target spare parts in the nuclear power plant group, the following steps are also implemented:

[0268] Determine the reference life of the target spare parts based on the product of the expected life and the first time unit parameter; determine the number of effective installation locations for the target spare parts based on the current installed quantity, continuous available time, average replacement times and reference life of the target spare parts; determine the effective reserve quantity of the target spare parts based on the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare parts.

[0269] In one embodiment, when the processor executes the computer program to determine the number of effective installation positions of the target spare part according to the current installation quantity, continuous usable time, average replacement times and reference life of the target spare part, the following steps are further implemented:

[0270] The product of the reference life of the target spare part, the current installation quantity, the continuous available time and the average replacement times is taken as the number of invalid installation positions of the target spare part; the difference between the current installation quantity of the target spare part and the number of invalid installation positions is taken as the number of valid installation positions of the target spare part.

[0271] In one embodiment, when the processor executes the computer program to determine the effective reserve quantity of the target spare part according to the current installed quantity, average replacement times, preset maintenance time and reference life of the target spare part, the following steps are also implemented:

[0272] The ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare parts; the product of the reference life of the target spare parts, the reference maintenance time, the current installation quantity and the average replacement times is used as the effective reserve quantity of the target spare parts.

[0273] In one embodiment, when the processor executes the computer program to determine the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the processor further implements the following steps:

[0274] The intermediate parameter of the target spare part is determined according to the product of the expected life span and the first time unit parameter; the ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

[0275] In one embodiment, when the processor executes the computer program to determine the target reserve quantity for the target spare parts of each nuclear power plant in the nuclear power plant group in the future period according to the number of effective installation positions, the effective reserve quantity and the total cost function, the following steps are also implemented:

[0276] Based on the number of effective installation positions and the effective reserve quantity, 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 reference reserve quantity of the target spare parts, the number of effective installation positions and the target guarantee rate, determine the total reserve quantity of the target spare parts in the nuclear power plant group; based on the total reserve quantity and the reserve requirements of the nuclear power plant group, 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.

[0277] 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.

[0278] 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 this 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.

[0279] 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.

[0280] 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: Determining, based on the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group, the average number of replacement times of the target spare parts within the expected life span; 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 average number of replacements, life influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group; The 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

2. The method according to claim 1, characterized in that The life-cycle influencing parameters include continuous availability duration and preset maintenance duration; wherein the continuous availability duration is the duration from the installation of the target spare part to the repeated occurrence of failure of the target spare part; The determining, based on the average number of replacements, life-influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in 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, comprises: Determining a reference life span of the target spare part according to the product of the expected life span and the first time unit parameter; Determine the number of effective installation locations for the target spare parts in the nuclear power plant group in a future period according to the current installed number, the continuous available time, the average number of replacements and the reference life of the target spare parts; The effective reserve quantity of the target spare parts in the nuclear power plant cluster in a future period is determined based on the current installed quantity of the target spare parts, the average number of replacement times, the preset maintenance time and the reference life span.

3. The method according to claim 2, characterized in that The step of determining the number of effective installation locations of the target spare parts in the nuclear power plant group in a future period according to the current installation number, the continuous available time, the average number of replacement times and the reference life of the target spare parts comprises: The product of the reference life span, the current installed quantity, the continuous usable time and the average replacement times of the target spare parts is used as the number of invalid installation positions of the target spare parts in the nuclear power plant group in the future period; The difference between the current installation quantity of the target spare part and the number of invalid installation positions is used as the number of valid installation positions of the target spare part in the nuclear power plant group in the future period.

4. The method according to claim 2, characterized in that: Determining the effective reserve quantity of the target spare parts in the nuclear power plant group in a future period according to the current installed quantity of the target spare parts, the average number of replacement times, the preset maintenance time and the reference lifespan includes: The ratio between the preset maintenance time and the second time unit parameter is used as the reference maintenance time of the target spare part; The product of the reference life span, the reference maintenance time, the current installed quantity and the average replacement times of the target spare parts is taken as the effective reserve quantity of the target spare parts in the nuclear power plant group in the future period.

5. The method according to claim 1, characterized in that The step of determining the average number of replacement times of the target spare parts within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group includes: Determining an intermediate parameter of the target spare part according to the product of the expected life span and the first time unit parameter; The ratio between the intermediate parameter and the spare part replacement cycle is used as the average number of replacement times of the target spare part within the expected life span.

6. The method according to claim 1, characterized in that Determining 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 number of effective installation positions, the effective reserve quantity and the total cost function includes: Determine, according to 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; 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.

7. A device for determining the spare parts reserve quantity of a nuclear power plant, characterized in that: The device comprises: A times determination module, used to determine the average number of times the target spare parts are replaced within the expected life span according to the expected life span and spare parts replacement cycle of the target spare parts of the nuclear power plant group; a parameter determination module, for determining 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 average number of replacements, life-influencing parameters and expected life of the target spare parts, and the current number of installations of the target spare parts in the nuclear power plant group; A 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 based on the number of effective installation positions, the effective reserve quantity and the total cost function; wherein the total cost function is used to describe the cost incurred by the target spare part during the expected life cycle.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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