Method, device and computer equipment for determining flow rate in reactor primary circuit

Abstract

The application relates to a reactor primary loop flow determination method and device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring the current rotating speed of a main pump in a reactor primary loop; determining the head of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump, the to-be-solved flow in the reactor primary loop and a first head mapping function; determining the first head of the main pump at the current rotating speed according to the current rotating speed, the head of the main pump at the rated rotating speed and a first relationship, wherein the first relationship is used for indicating the relationship between the head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; determining the second head of the main pump at the current rotating speed according to the to-be-solved flow and a second head mapping function; and determining the value of the to-be-solved flow according to the first head and the second head. The method can improve the accuracy of the determination result of the flow in the reactor primary loop.

Description

Technical Field

[0001] This application relates to the field of nuclear facility technology, and in particular to a method, apparatus, computer equipment, storage medium and computer program product for determining flow rate in the primary loop of a reactor. Background Technology

[0002] A conventional land-based pressurized water reactor consists of a pressure vessel, a steam generator, a main pump, a pressurizer, and main piping connecting the various devices, forming the reactor primary loop. Often, a bend flow meter is installed on the main piping to measure the reactor primary loop flow rate, or the reactor primary loop flow rate is determined by measuring the pressure difference between the inlet and outlet of the main pump.

[0003] However, the use of bend flow meters has certain limitations. It requires a sufficiently long primary loop pipe, ample space for pipe arrangement, and a suitable location for the bend. Furthermore, the bend angle affects the measurement accuracy. When measuring the pressure difference between the inlet and outlet of the main pump, the measuring point needs to be a certain distance from the main pump outlet to obtain stable flow field parameters. This results in some error in the determined flow data. Moreover, if there are resistance devices at the main pump outlet, a malfunction will cause significant errors in the pressure difference data. Therefore, existing methods for determining flow rates in the reactor primary loop suffer from low accuracy. Summary of the Invention

[0004] Therefore, it is necessary to address the problem of low accuracy in the determination of flow rate in the primary loop of a reactor by providing a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for determining flow rate in the primary loop of a reactor, which can improve the accuracy of the determination results.

[0005] In a first aspect, this application provides a method for determining the flow rate in the primary loop of a reactor. The method includes:

[0006] Obtain the current rotational speed of the main pump in the reactor primary loop;

[0007] Based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, determine the head of the main pump at the rated rotational speed.

[0008] Based on the current speed, the head of the main pump at the rated speed, and the first relationship, determine the first head of the main pump at the current speed. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0009] Determine the second head of the main pump at the current speed based on the mapping function of the desired flow rate and the second head;

[0010] The value of the flow rate to be determined is determined based on the first head and the second head.

[0011] In one embodiment, the head of the main pump at its rated speed is determined based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and a first head mapping function, including:

[0012] Determine the flow rate of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop.

[0013] The head of the main pump at its rated speed is determined based on the mapping function between the flow rate and the first head of the main pump at its rated speed.

[0014] In one embodiment, the first relationship is determined using the following formula:

[0015]

[0016] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0017] In one embodiment, determining the flow rate of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop includes:

[0018] The flow rate of the main pump at its rated speed is determined using the following formula:

[0019]

[0020] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0021] In one embodiment, determining the head of the main pump at its rated speed based on a mapping function between the flow rate of the main pump at its rated speed and the first head includes:

[0022] The head of the main pump at rated speed is determined using the following first head mapping function:

[0023]

[0024] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0025] In one embodiment, determining the second head of the main pump at the current speed based on the desired flow rate and the second head mapping function includes:

[0026] The second head of the main pump at the current speed is determined using the following second head mapping function:

[0027]

[0028] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0029] Secondly, this application also provides a flow determination device in the primary loop of a reactor. The device includes:

[0030] The data acquisition module is used to acquire the current rotational speed of the main pump in the reactor primary loop;

[0031] The rated head determination module is used to determine the head of the main pump at the rated speed based on the current speed, the rated speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function.

[0032] The first head determination module is used to determine the first head of the main pump at the current speed based on the current speed, the head of the main pump at the rated speed, and the first relationship. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0033] The second head determination module is used to determine the second head of the main pump at the current speed based on the flow rate to be determined and the second head mapping function.

[0034] The flow rate determination module is used to determine the value of the flow rate to be determined based on the first head and the second head.

[0035] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0036] Obtain the current rotational speed of the main pump in the reactor primary loop;

[0037] Based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, determine the head of the main pump at the rated rotational speed.

[0038] Based on the current speed, the head of the main pump at the rated speed, and the first relationship, determine the first head of the main pump at the current speed. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0039] Determine the second head of the main pump at the current speed based on the mapping function of the desired flow rate and the second head;

[0040] The value of the flow rate to be determined is determined based on the first head and the second head.

[0041] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0042] Obtain the current rotational speed of the main pump in the reactor primary loop;

[0043] Based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, determine the head of the main pump at the rated rotational speed.

[0044] Based on the current speed, the head of the main pump at the rated speed, and the first relationship, determine the first head of the main pump at the current speed. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0045] Determine the second head of the main pump at the current speed based on the mapping function of the desired flow rate and the second head;

[0046] The value of the flow rate to be determined is determined based on the first head and the second head.

[0047] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0048] Obtain the current rotational speed of the main pump in the reactor primary loop;

[0049] Based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, determine the head of the main pump at the rated rotational speed.

[0050] Based on the current speed, the head of the main pump at the rated speed, and the first relationship, determine the first head of the main pump at the current speed. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0051] Determine the second head of the main pump at the current speed based on the mapping function of the desired flow rate and the second head;

[0052] The value of the flow rate to be determined is determined based on the first head and the second head.

[0053] The aforementioned method, apparatus, computer equipment, storage medium, and computer program product for determining flow rate in the reactor primary loop obtains the current rotational speed of the main pump in the reactor primary loop. Based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and a first head mapping function, the head of the main pump at its rated rotational speed is determined. Then, based on the current rotational speed, the head of the main pump at its rated rotational speed, and a first relationship, the first head of the main pump at the current rotational speed is determined. Finally, based on the desired flow rate and a second head mapping function, the second head of the main pump at the current rotational speed is determined. This method, which uses the current and rated rotational speed of the main pump, employs the first head mapping function, the first relationship, and the second head mapping function to obtain the head, first head, and second head of the main pump at its rated rotational speed, and then determines the desired flow rate, avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop. Attached Figure Description

[0054] Figure 1 This is a diagram illustrating the application environment of a flow determination method in the reactor primary loop in one embodiment.

[0055] Figure 2 This is a flowchart illustrating a method for determining the flow rate in the reactor primary loop in one embodiment;

[0056] Figure 3 This is a schematic diagram of a sub-process of S202 in one embodiment;

[0057] Figure 4 This is a schematic diagram of the overall flow rate determination method in the reactor primary loop of one embodiment;

[0058] Figure 5 This is a schematic diagram of the first head curve corresponding to the first head mapping function in one embodiment;

[0059] Figure 6 This is a structural diagram of the reactor primary loop in one embodiment;

[0060] Figure 7 This is a structural block diagram of a flow determination device in the reactor primary loop in one embodiment;

[0061] Figure 8 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0063] The method for determining the flow rate in the primary loop of a reactor provided in this application can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with the main pump 104 in the reactor primary loop. The flow determination method in the reactor primary loop provided in this application embodiment can be executed by terminal 102 or the server alone, or by terminal 102 and the server in cooperation. The data storage system can store the data that the server needs to process. The data storage system can be integrated on the server or placed on the cloud or other network servers. Taking the execution by terminal 102 alone as an example: obtain the current rotational speed of the main pump in the reactor primary loop; determine the head of the main pump at the rated rotational speed based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function; determine the first head of the main pump at the current rotational speed based on the current rotational speed, the head of the main pump at the rated rotational speed, and the first relationship, whereby the first relationship indicates the relationship between the head of the main pump at any rotational speed and the head of the main pump at the rated rotational speed; determine the second head of the main pump at the current rotational speed based on the flow rate to be determined and the second head mapping function; determine the value of the flow rate to be determined based on the first head and the second head. The terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, and smart in-vehicle systems. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted devices. The server can be implemented using a standalone server or a server cluster consisting of multiple servers.

[0064] In one embodiment, such as Figure 2 As shown, a method for determining the flow rate in the primary loop of a reactor is provided, which can be applied to a computer device (the computer device can be...) Figure 1 Taking a terminal or server as an example, the explanation includes the following steps:

[0065] S201, obtain the current rotational speed of the main pump in the reactor primary loop.

[0066] The primary loop of the reactor is the loop device that directly removes heat from the reactor. The coolant in the reactor circulates in the primary loop. The main pump is a rotating mechanical device in the primary loop, whose function is to force the coolant to circulate, thereby transferring the heat generated in the reactor to the steam generator to produce steam that drives the turbine to do work. Computer equipment obtains the current rotational speed of the main pump in the primary loop.

[0067] S202, based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, determine the head of the main pump at the rated rotational speed.

[0068] Rated speed is the speed of the main pump at its rated power. The rated speed of the main pump is a fixed value. For example, the rated speed is 1480 rpm. The flow rate to be determined is the coolant flow rate of the main pump at the current speed, which is the coolant flow rate through any main pump in the reactor primary loop. The flow rate to be determined is an unknown quantity. The number of main pumps in the reactor primary loop includes at least one. The types of main pumps may be the same or different. Head is the energy increment per unit weight of coolant from the main pump inlet to the main pump outlet. Head at rated speed is the head at the rated speed of the main pump.

[0069] The first head mapping function indicates the correspondence between the flow rate of the main pump at its rated speed and its head at that speed. The flow rate of the main pump at its rated speed is the coolant flow rate in the reactor primary loop at that speed. The computer equipment determines the head of the main pump at its rated speed based on the current speed, the rated speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function. Since the desired flow rate is unknown, the head of the main pump at its rated speed is a function of the desired flow rate.

[0070] S203, based on the current speed, the head of the main pump at the rated speed, and the first relationship, determine the first head of the main pump at the current speed. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0071] The first relationship indicates the relationship between the head of the main pump at any given speed and the head of the main pump at its rated speed. The computer equipment inputs the current speed of the main pump, its rated speed, and the head of the main pump at its rated speed into the first relationship, and uses the calculated result as the first head of the main pump at the current speed. The first head indicates the head of the main pump at the current speed. Since the flow rate to be determined is unknown, and the head of the main pump at its rated speed is a function of the flow rate to be determined, the first head is a function of the flow rate to be determined.

[0072] S204, determine the second head of the main pump at the current speed based on the mapping function of the flow rate to be determined and the second head.

[0073] The second head mapping function indicates the correspondence between the flow rate and head of the main pump at any given speed. The flow rate to be determined is the flow rate of the main pump at the current speed. The second head is the head of the main pump at the current speed. The computer equipment inputs the flow rate to be determined into the second head mapping function to obtain the second head of the main pump at the current speed. Since the flow rate to be determined is unknown, the second head is a function of the flow rate to be determined.

[0074] S205, determine the value of the flow rate to be determined based on the first head and the second head.

[0075] Since both the first head and the second head are the heads of the main pump at the current speed, their values ​​are equal. Furthermore, since both the first head and the second head are functions of the desired flow rate, the computer can determine the value of the desired flow rate by ensuring that their values ​​are equal.

[0076] In the aforementioned method for determining the flow rate in the reactor primary loop, the current rotational speed of the main pump in the reactor primary loop is obtained. Based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function, the head of the main pump at its rated rotational speed is determined. Based on the current rotational speed, the head of the main pump at its rated rotational speed, and a first relationship, the first head of the main pump at its current rotational speed is determined. Based on the desired flow rate and a second head mapping function, the second head of the main pump at its current rotational speed is determined. Finally, based on the first and second heads, the value of the desired flow rate is determined. This method, which uses the current and rated rotational speed of the main pump, and employs the first head mapping function, the first relationship, and the second head mapping function to obtain the head, first head, and second head of the main pump at its rated rotational speed, and then determines the value of the desired flow rate, avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop.

[0077] In one embodiment, such as Figure 3 As shown, based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function, the head of the main pump at its rated rotational speed is determined, including:

[0078] S302, based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop, determine the flow rate of the main pump at its rated rotational speed.

[0079] Based on the characteristics of the main pump, its rotational speed is directly proportional to the coolant flow rate passing through it. When there is only one main pump in the reactor primary loop, the desired flow rate in the primary loop is equal to the coolant flow rate passing through that main pump. When there are at least one main pump in the primary loop, assuming the at least one main pump is of the same type, the desired flow rate in the primary loop is equal to the coolant flow rate passing through any one of the main pumps. In some embodiments, the at least one main pump in the primary loop may be of different types, and the coolant flow rate passing through each main pump may be different; therefore, the desired flow rate in the primary loop can be selected from the coolant flow rate passing through any one of the main pumps.

[0080] The computer equipment determines the flow rate of the main pump at its rated speed based on the current rotational speed, the rated speed of the main pump, and the desired flow rate in the reactor primary loop. Since the desired flow rate is unknown, the flow rate of the main pump at its rated speed is a function of the desired flow rate.

[0081] S304, determine the head of the main pump at rated speed based on the mapping function of the flow rate and first head of the main pump at rated speed.

[0082] The computer equipment inputs the flow rate of the main pump at its rated speed into the first head mapping function to obtain the head of the main pump at its rated speed.

[0083] In this embodiment, the flow rate of the main pump at its rated speed is determined by the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop. The head of the main pump at its rated rotational speed is then determined based on the flow rate at its rated rotational speed and the first head mapping function. Since both the flow rate and head at the rated rotational speed are functions of the desired flow rate, the calculation of the desired flow rate avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop.

[0084] In one embodiment, the first relationship is determined using the following formula:

[0085]

[0086] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0087] Based on the characteristics of the main pump, its head is directly proportional to the square of its flow rate, and its flow rate is directly proportional to its rotational speed. This leads to the first relationship: the ratio of the main pump's head at any given rotational speed to its head at its rated rotational speed is equal to the square of the ratio of that rotational speed to the rated rotational speed. This first relationship indicates the relationship between the main pump's head at any given rotational speed and its head at its rated rotational speed.

[0088] In this embodiment, based on the first relationship, the first head of the main pump at the current speed can be determined, which is used to calculate the value of the flow rate to be determined. This avoids errors caused by flow meter measurement and differential pressure measurement, and the determination result of the flow rate in the reactor primary loop has high accuracy.

[0089] In one embodiment, determining the flow rate of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop includes:

[0090] The flow rate of the main pump at its rated speed is determined using the following formula:

[0091]

[0092] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0093] The main pump's flow rate is proportional to its rotational speed. Therefore, the ratio of the main pump's flow rate at the current rotational speed to its flow rate at the rated rotational speed is equal to the ratio of the current rotational speed to the rated rotational speed. The main pump's flow rate at the current rotational speed is the desired flow rate in the reactor's primary loop. By substituting the current rotational speed, the main pump's rated rotational speed, and the desired flow rate in the reactor's primary loop into the above formula, the computer can determine the main pump's flow rate at its rated rotational speed. .

[0094] In this embodiment, the flow rate of the main pump at its rated speed is determined using a formula based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop. The flow rate of the main pump at its rated rotational speed is a function of the desired flow rate. Calculating the desired flow rate based on the flow rate of the main pump at its rated rotational speed avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop.

[0095] In one embodiment, determining the head of the main pump at its rated speed based on a mapping function between the main pump's flow rate at rated speed and the first head includes:

[0096] The head of the main pump at rated speed is determined using the following first head mapping function:

[0097]

[0098] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0099] In this process, the computer equipment inputs the flow rate of the main pump at its rated speed into the first head mapping function to determine the head of the main pump at its rated speed. During the hydraulic performance test of the main pump, based on the experimental data of the pump's head and flow rate, a curve fitting algorithm is used to fit the experimental data into a first head curve. The function corresponding to this first head curve is the first head mapping function. Different types of main pumps correspond to different first head mapping functions. The first head mapping functions corresponding to different types of main pumps can be... , , Different mappings are possible, but others are not. Main pumps of the same type correspond to the same first head mapping function. In some embodiments, because... Therefore, Q N Substituting into the first head mapping function, we get

[0100] .

[0101] In this embodiment, the head of the main pump at rated speed is determined by mapping the flow rate of the main pump at rated speed and the first head function, thus avoiding errors caused by flow meter measurement and differential pressure measurement. The determination result of the flow rate in the reactor primary loop has high accuracy.

[0102] In one embodiment, determining the second head of the main pump at the current speed based on the desired flow rate and the second head mapping function includes:

[0103] The second head of the main pump at the current speed is determined using the following second head mapping function:

[0104]

[0105] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0106] The total pressure loss in the reactor primary loop includes frictional drag and local drag. For complex systems, the total pressure loss is the sum of these two types of losses. The formula for calculating the total pressure loss is as follows:

[0107]

[0108] in, This represents the total pressure drop, expressed in Pa. This indicates the density of the coolant, expressed in kg / m³. 3 Where u represents the average flow velocity of the coolant. For the same reactor primary loop with identical geometric parameters, the only factors affecting the total drag coefficient are: coolant density, kinematic viscosity, and flow rate. The Reynolds number is calculated using the formula: For the entire reactor primary loop, let Re* represent the relative Reynolds number. The relative magnitude of the total drag coefficient is used... *express.

[0109]

[0110] When the Reynolds number of the coolant flow in the primary coolant loop of the reactor exceeds a certain limit, the total drag coefficient of the primary coolant loop will remain almost unchanged; that is, the total drag coefficient of the same reactor is essentially the same under different design operating conditions. In some embodiments, the total drag coefficient obtained through actual experiments is 158.5. Substituting this into the formula for calculating the total drag coefficient, we can obtain:

[0111]

[0112] The above calculation formula is transformed to obtain the following formula:

[0113]

[0114] because ,but

[0115] in, .

[0116] K is a constant. In actual reactor operation, the value of K can be continuously corrected based on the heat balance test during the commissioning test phase, thereby improving the accuracy of the flow determination results.

[0117] In this embodiment, the second head of the main pump at the current speed is determined by using the second head mapping function based on the desired flow rate. Determining the desired flow rate based on the second head avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop.

[0118] To illustrate in detail the method and effect of determining the flow rate in the reactor primary loop in this scheme, a detailed embodiment is described below:

[0119] Obtain the current rotational speed of the main pump in the reactor primary loop. Based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop, determine the flow rate of the main pump at its rated rotational speed using the following formula:

[0120]

[0121] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed. .

[0122] like Figure 4 The diagram shows the overall flow chart for determining the flow rate in the reactor primary loop. Based on the flow rate of the main pump at rated speed and the first head mapping function, the head of the main pump at rated speed is determined using the following first head mapping function:

[0123]

[0124] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0125] In the hydraulic performance test of the main pump, the first head mapping function is obtained by fitting the experimental data of the main pump's head and flow rate to a first head curve using a curve fitting algorithm. The function corresponding to this first head curve is the first head mapping function. For example, MATLAB (Matrix Laboratory) software can be used to fit the experimental data to obtain the first head curve.

[0126] like Figure 5 The diagram shows the first head curve corresponding to the first head mapping function. (a) represents the experimental data of the main pump's operating characteristics, with the horizontal axis representing flow rate and the vertical axis representing head. (b) shows the first head curve obtained by fitting the experimental data. From the fitted first head curve, it can be seen that the flow rate is between 2000 and 6000 m³ / h. 3 The / h region shows good fitting results, and 3600m can be selected. 3 / h is the operating point of the main pump.

[0127] because Therefore, Q N Substituting into the first head mapping function, we get

[0128] .

[0129] Based on the current rotational speed, the head of the main pump at its rated speed, and the first relationship, determine the first head of the main pump at the current rotational speed. The first relationship indicates the relationship between the head of the main pump at any given rotational speed and the head of the main pump at its rated speed. The first relationship is determined using the following formula:

[0130]

[0131] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0132] because, ,Will Substituting into the first relation, we get:

[0133]

[0134] Based on the desired flow rate and the second head mapping function, the second head of the main pump at the current speed is determined using the following second head mapping function:

[0135]

[0136] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0137] The desired flow rate is determined based on the first head and the second head. Since both the first head and the second head are the heads of the main pump at the current speed, their values ​​are equal. Furthermore, since both the first head and the second head are functions of the desired flow rate, the value of the desired flow rate can be determined by ensuring that their values ​​are equal.

[0138] In some embodiments, the number of main pumps in the reactor primary loop is m, then

[0139] Since the values ​​of the first head and the second head are equal, we get:

[0140]

[0141] Thus, the desired flow rate Qn is obtained:

[0142]

[0143] like Figure 6The diagram shows the structure of the reactor's primary loop. In some embodiments, m=2, B0=57.29698, B1=0.00432935, B2=-2.766005E-06, N=1480, then the calculated flow rate is:

[0144]

[0145] The aforementioned method for determining flow rate in the reactor primary loop involves obtaining the current rotational speed of the main pump in the primary loop. Based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the primary loop, and a first head mapping function, the pump's head at its rated speed is determined. Then, based on the current rotational speed, the pump's head at its rated speed, and a first relationship, the first head of the main pump at the current rotational speed is determined. Finally, based on the desired flow rate and a second head mapping function, the second head of the main pump at the current rotational speed is determined. This method, which uses the current and rated rotational speeds of the main pump, along with the first head mapping function, the first relationship, and the second head mapping function to obtain the pump's head at its rated speed, the first head, and the second head, respectively, and then determines the desired flow rate, avoids errors caused by flow meter measurements and differential pressure measurements. The result in high accuracy for determining the flow rate in the reactor primary loop. Furthermore, it eliminates the need for piping structures and internal throttling instruments, avoids openings in equipment piping, prevents the introduction of additional resistance, and reduces the risk of primary loop leakage. For the primary loop of a compact reactor, due to the lack of main piping and bends, it is impossible to use a bend flowmeter to measure the flow rate in the primary loop. The flow rate determination method for the primary loop proposed in this application can solve the flow rate determination problem in the primary loop of a compact reactor while ensuring the accuracy of the flow rate measurement. K in determining the flow rate is a dynamically adjustable coefficient that can be continuously corrected during reactor operation, which helps improve the accuracy of the flow rate determination results, meets the requirements of thermal hydraulic calculations, and supports the safe operation of the reactor core.

[0146] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0147] Based on the same inventive concept, this application also provides a reactor primary loop flow determination device for implementing the above-described reactor primary loop flow determination method. The solution provided by this device is similar to the solution described in the above-described method. Therefore, the specific limitations of one or more reactor primary loop flow determination device embodiments provided below can be found in the limitations of the reactor primary loop flow determination method described above, and will not be repeated here.

[0148] In one embodiment, such as Figure 7 As shown, a flow determination device 100 for a reactor primary loop is provided, comprising: a data acquisition module 110, a rated head determination module 120, a first head determination module 130, a second head determination module 140, and a flow determination module 150, wherein:

[0149] The data acquisition module 110 is used to acquire the current rotational speed of the main pump in the reactor primary loop.

[0150] The rated head determination module 120 is used to determine the head of the main pump at the rated speed based on the current speed, the rated speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function.

[0151] The first head determination module 130 is used to determine the first head of the main pump at the current speed based on the current speed, the head of the main pump at the rated speed, and the first relationship. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed.

[0152] The second head determination module 140 is used to determine the second head of the main pump at the current speed based on the flow rate to be determined and the second head mapping function.

[0153] The flow rate determination module 150 is used to determine the value of the flow rate to be determined based on the first head and the second head.

[0154] The aforementioned flow determination device for the reactor primary loop obtains the current rotational speed of the main pump in the reactor primary loop. Based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and a first head mapping function, it determines the head of the main pump at its rated rotational speed. Based on the current rotational speed, the head of the main pump at its rated rotational speed, and a first relationship, it determines the first head of the main pump at the current rotational speed. Based on the desired flow rate and a second head mapping function, it determines the second head of the main pump at the current rotational speed. Finally, based on the first and second heads, it determines the value of the desired flow rate. This device, which uses the current and rated rotational speed of the main pump, and employs the first head mapping function, the first relationship, and the second head mapping function to obtain the head, first head, and second head of the main pump at its rated rotational speed, and then determines the value of the desired flow rate, avoids errors caused by flow meter measurements and differential pressure measurements, resulting in high accuracy in determining the flow rate in the reactor primary loop.

[0155] In one embodiment, in determining the head of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function, the rated head determination module 120 is further configured to: determine the flow rate of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop; and determine the head of the main pump at its rated speed based on the flow rate of the main pump at its rated speed and the first head mapping function.

[0156] In one embodiment, the first head determination module 130 is further configured to: determine the first relationship using the following formula:

[0157]

[0158] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0159] In one embodiment, in determining the flow rate of the main pump at its rated speed based on the current rotational speed, the rated head determination module 120 is further configured to: determine the flow rate of the main pump at its rated speed using the following formula:

[0160]

[0161] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0162] In one embodiment, regarding determining the head of the main pump at rated speed based on the flow rate of the main pump at rated speed and a first head mapping function, the rated head determining module 120 is further configured to: determine the head of the main pump at rated speed using the following first head mapping function:

[0163]

[0164] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0165] In one embodiment, in determining the second head of the main pump at the current speed based on the desired flow rate and the second head mapping function, the second head determining module 140 is further configured to: determine the second head of the main pump at the current speed using the following second head mapping function:

[0166]

[0167] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0168] The modules in the flow determination device in the primary loop of the reactor described above can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0169] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 8As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a flow determination method in the primary loop of a reactor.

[0170] Those skilled in the art will understand that Figure 8 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0171] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0172] Obtain the current rotational speed of the main pump in the reactor primary loop; determine the head of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function; determine the first head of the main pump at the current rotational speed based on the current rotational speed, the head of the main pump at its rated speed, and a first relationship, where the first relationship indicates the relationship between the head of the main pump at any rotational speed and the head of the main pump at its rated speed; determine the second head of the main pump at the current rotational speed based on the desired flow rate and the second head mapping function; and determine the value of the desired flow rate based on the first and second heads.

[0173] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0174] Based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop, determine the flow rate of the main pump at its rated rotational speed; based on the flow rate of the main pump at its rated rotational speed and the first head mapping function, determine the head of the main pump at its rated rotational speed.

[0175] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0176] The first relationship is determined using the following formula:

[0177]

[0178] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0179] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0180] The flow rate of the main pump at its rated speed is determined using the following formula:

[0181]

[0182] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0183] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0184] The head of the main pump at rated speed is determined using the following first head mapping function:

[0185]

[0186] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0187] In one embodiment, the processor, when executing a computer program, also performs the following steps:

[0188] The second head of the main pump at the current speed is determined using the following second head mapping function:

[0189]

[0190] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0191] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0192] Obtain the current rotational speed of the main pump in the reactor primary loop; determine the head of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function; determine the first head of the main pump at the current rotational speed based on the current rotational speed, the head of the main pump at its rated speed, and a first relationship, where the first relationship indicates the relationship between the head of the main pump at any rotational speed and the head of the main pump at its rated speed; determine the second head of the main pump at the current rotational speed based on the desired flow rate and the second head mapping function; and determine the value of the desired flow rate based on the first and second heads.

[0193] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0194] Based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop, determine the flow rate of the main pump at its rated rotational speed; based on the flow rate of the main pump at its rated rotational speed and the first head mapping function, determine the head of the main pump at its rated rotational speed.

[0195] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0196] The first relationship is determined using the following formula:

[0197]

[0198] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0199] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0200] The flow rate of the main pump at its rated speed is determined using the following formula:

[0201]

[0202] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0203] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0204] The head of the main pump at rated speed is determined using the following first head mapping function:

[0205]

[0206] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0207] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0208] The second head of the main pump at the current speed is determined using the following second head mapping function:

[0209]

[0210] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0211] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0212] Obtain the current rotational speed of the main pump in the reactor primary loop; determine the head of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, the desired flow rate in the reactor primary loop, and the first head mapping function; determine the first head of the main pump at the current rotational speed based on the current rotational speed, the head of the main pump at its rated speed, and a first relationship, where the first relationship indicates the relationship between the head of the main pump at any rotational speed and the head of the main pump at its rated speed; determine the second head of the main pump at the current rotational speed based on the desired flow rate and the second head mapping function; and determine the value of the desired flow rate based on the first and second heads.

[0213] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0214] Based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop, determine the flow rate of the main pump at its rated rotational speed; based on the flow rate of the main pump at its rated rotational speed and the first head mapping function, determine the head of the main pump at its rated rotational speed.

[0215] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0216] The first relationship is determined using the following formula:

[0217]

[0218] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

[0219] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0220] The flow rate of the main pump at its rated speed is determined using the following formula:

[0221]

[0222] Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at its rated speed.

[0223] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0224] The head of the main pump at rated speed is determined using the following first head mapping function:

[0225]

[0226] in, This indicates the head of the main pump at its rated speed. , , All are constants. This indicates the flow rate of the main pump at its rated speed.

[0227] In one embodiment, when the computer program is executed by a processor, it also performs the following steps:

[0228] The second head of the main pump at the current speed is determined using the following second head mapping function:

[0229]

[0230] in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

[0231] 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, data stored, data displayed, 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 related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0232] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments described above. Any references to memory, databases, or other media 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), magnetic 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. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0233] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0234] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining the flow rate in the primary loop of a reactor, characterized in that, The method includes: Obtain the current rotational speed of the main pump in the reactor primary loop; Based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function, the head of the main pump at the rated rotational speed is determined; the first head mapping function is used to indicate the correspondence between the flow rate of the main pump at the rated rotational speed and the flow rate and head of the main pump at the rated rotational speed. Based on the current rotational speed, the head of the main pump at the rated rotational speed, and the first relationship, the first head of the main pump at the current rotational speed is determined. The first relationship is used to indicate the relationship between the head of the main pump at any rotational speed and the head of the main pump at the rated rotational speed. Based on the desired flow rate and the second head mapping function, the second head of the main pump at the current speed is determined; the second head mapping function is used to indicate the correspondence between the flow rate and the head of the main pump at any speed. The value of the flow rate to be determined is determined based on the fact that the values ​​of the first head and the second head are equal. The first relationship is determined using the following formula: Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

2. The method according to claim 1, characterized in that, The step of determining the head of the main pump at its rated speed based on the current rotational speed, the rated rotational speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function includes: Based on the current rotational speed, the rated rotational speed of the main pump, and the required flow rate in the reactor primary loop, determine the flow rate of the main pump at the rated rotational speed. The head of the main pump at the rated speed is determined based on the mapping function between the flow rate and the first head of the main pump at the rated speed.

3. The method according to claim 2, characterized in that, Determining the flow rate of the main pump at the rated speed based on the current rotational speed, the rated rotational speed of the main pump, and the desired flow rate in the reactor primary loop includes: The flow rate of the main pump at the rated speed is determined using the following formula: Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at the rated speed.

4. The method according to claim 2, characterized in that, The step of determining the head of the main pump at the rated speed based on the mapping function between the flow rate and the first head of the main pump at the rated speed includes: The head of the main pump at the rated speed is determined using the following first head mapping function: in, This indicates the head of the main pump at the rated speed. , , All are constants. This indicates the flow rate of the main pump at the rated speed.

5. The method according to claim 1, characterized in that, Determining the second head of the main pump at the current speed based on the desired flow rate and the second head mapping function includes: The second head of the main pump at the current speed is determined using the following second head mapping function: in, This indicates the head of the main pump at the current speed. This represents the flow rate to be determined in the primary loop of the reactor, where K is a constant.

6. The method according to claim 1, characterized in that, The step of determining the first head of the main pump at the current speed based on the current rotational speed, the head of the main pump at the rated speed, and the first relationship includes: The current rotational speed, the rated rotational speed of the main pump, and the head of the main pump at the rated rotational speed are substituted into the first relationship to obtain the calculation result as the first head of the main pump at the current rotational speed.

7. The method according to claim 1, characterized in that, The steps for determining the first head mapping function include: In the hydraulic performance test of the main pump, experimental data on the head and flow rate of the main pump were obtained; The experimental data were fitted to a first head curve using a curve fitting algorithm, and the function corresponding to the first head curve was used as the first head mapping function.

8. A flow determination device for a reactor primary loop, characterized in that, The device includes: The data acquisition module is used to acquire the current rotational speed of the main pump in the reactor primary loop; The rated head determination module is used to determine the head of the main pump at the rated speed based on the current speed, the rated speed of the main pump, the flow rate to be determined in the reactor primary loop, and the first head mapping function; the first head mapping function is used to indicate the correspondence between the flow rate of the main pump at the rated speed and the flow rate head of the main pump at the rated speed. The first head determination module is used to determine the first head of the main pump at the current speed based on the current speed, the head of the main pump at the rated speed, and a first relationship. The first relationship is used to indicate the relationship between the head of the main pump at any speed and the head of the main pump at the rated speed. The second head determination module is used to determine the second head of the main pump at the current speed based on the desired flow rate and the second head mapping function; the second head mapping function is used to indicate the correspondence between the flow rate and the head of the main pump at any speed. The flow rate determination module is used to determine the value of the flow rate to be determined based on the fact that the values ​​of the first head and the second head are equal. The first head determination module is also used to: determine the first relationship using the following formula: Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This indicates the head of the main pump at its rated speed. This indicates the head of the main pump at the current speed.

9. The apparatus according to claim 8, characterized in that, The rated head determination module is also used to: determine the flow rate of the main pump at the rated speed based on the current speed, the rated speed of the main pump, and the flow rate to be determined in the reactor primary loop; The head of the main pump at the rated speed is determined based on the mapping function between the flow rate and the first head of the main pump at the rated speed.

10. The apparatus according to claim 9, characterized in that, The rated head determination module is also used to: determine the flow rate of the main pump at the rated speed using the following formula: Where n represents the current speed of the main pump, and N represents the rated speed of the main pump. This represents the desired flow rate in the primary loop of the reactor. This indicates the flow rate of the main pump at the rated speed.

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