Method and apparatus for determining flow in primary loop of reactor, and computer device

Abstract

A method and apparatus for determining a flow in a primary loop of a reactor, a computer device, a storage medium, and a computer program product. The method comprises: acquiring the current rotating speed of a main pump (104) in a primary loop of a reactor (S201); according to the current rotating speed, a rated rotating speed of the main pump (104), a flow to be solved in the primary loop of the reactor, and a first lift mapping function, determining a lift at the rated rotating speed (S202); according to the current rotating speed, the lift at the rated rotating speed, and a first relationship, determining a first lift at the current rotating speed (S203); according to said flow and a second lift mapping function, determining a second lift at the current rotating speed (S204); and determining the value of said flow according to the first lift and the second lift (S205). According to the method, the value of a flow to be solved is calculated on the basis of the flow of a main pump (104) at a rated rotating speed, thereby avoiding errors caused by flowmeter measurement and differential pressure measurement, and achieving high accuracy of determination results.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear facility technologies, and in particular, to a method and apparatus for determining a flow in a primary loop of a reactor, a computer device, a storage medium, and a computer program product. BACKGROUND

[0002] In a conventional land-based pressurized water reactor, a pressure vessel, a steam generator, a main pump, a pressure stabilizer and a main pipe for comiecting all the devices form a primary loop of the reactor. An elbow flow meter is often arranged on the main pipe to measure a flow of the primary7 loop of the reactor, or the flow of the primary’ loop of the reactor is determined by measuring a pressure difference of an inlet and an outlet of the main pump.

[0003] However, use of the elbow flow meter has certain limitations since it requires a primary loop pipe with a sufficient length, a sufficient pipe arrangement space, and an elbow position for placing the elbow flow meter, and an elbow angle affects measurement accuracy of the elbow flow meter. When the pressure difference of the inlet and the outlet of the main pump is measured, a selected position of a measuring point needs to be at a certain distance from the outlet of the main pump to obtain stable flow field parameters, thus a certain error exists in determined flow data. In addition, when a resistance member device exists at the outlet of the main pump, if a fault occurs, pressure difference data has a serious error. Therefore, the traditional method for determining the flow in the primary loop of the reactor has the problem that a determination result of the flow has low accuracy. SUMMARY

[0004] According to various embodiments of the present application, a method and apparatus for determining a flow in a primary loop of a reactor, a computer device, a computer-readable storage medium, and a computer program product are provided.

[0005] In a first aspect, the present application provides a method for determining a flow in a primary loop of a reactor. The method includes: obtaining a current rotating speed of a main pump in the primary loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, detenuining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0006] In an embodiment, according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, determining the head of the main pump at the rated rotating speed includes: determining a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; and determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0007] In an embodiment, the first relationship is determined using the following formula: Hn(Qn) = Hn(Qn) W where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump. HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents the head of the main pump at the current rotating speed.

[0008] In an embodiment, determining the flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor includes: determining the flow of the main pump at the rated rotating speed using the following formula: Qn = n Qn N where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop of the reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0009] In an embodiment, determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function includes: determining the head of the main pump at the rated rotating speed using the following first head mapping function: Hn(Qn) — Bo + ■ Qn + B2 ■ Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, B1 and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0010] In an embodiment, according to the flow to be solved and the second head mapping function, determining the second head of the main pump at the current rotating speed includes: determining the second head of the mam pump at the current rotating speed using the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0011] In a second aspect, the present application further provides an apparatus for determining a flow in a primary loop of a reactor. The apparatus includes: a data obtaining module configured to obtain a current rotating speed of a main pump in the primary loop of the reactor; a rated head determining module configured to, according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary' loop of the reactor, and a first head mapping function, determine a head of the main pump at the rated rotating speed; a first head determining module configured to, according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determine a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; a second head determining module configured to, according to the flow to be solved and a second head mapping function, determine a second head of the main pump at the current rotating speed; and a flow determining module configured to determine a value of the flow to be solved according to the first head and the second head.

[0012] In a third aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor implementing the following steps when executing the computer program: obtaining a current rotating speed of a main pump in the primary’ loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0013] In a fourth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium has a computer program stored therein, and the computer program, when executed by a processor, implements the following steps: obtaining a current rotating speed of a main pump in the primary loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0014] In a fifth aspect, the present application further provides a computer program product. The computer program product includes a computer program which, when executed by a processor, implements the following steps: obtaining a current rotating speed of a main pump in the primary loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0015] Details of one or more embodiments of the present application are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the present application will be apparent from the description, the accompanying drawings, and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to illustrate the technical solutions in the embodiments of the present application or the prior art more clearly, the drawings required for describing the embodiments or the prior art will be described briefly. Apparently, the following described drawings are merely for the embodiments of the present application, and other drawings can be derived from the disclosed drawings by those of ordinary skill in the art without any creative effort.

[0017] To better describe and illustrate the embodiments and / or examples of the invention disclosed here, reference may be made to one or more drawings. The additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed invention, the presently described embodiments and / or examples, and the best modes of the presently understood invention.

[0018] FIG. 1 is a view of an application environment of a method for determining a flow in a primary loop of a reactor according to an embodiment;

[0019] FIG. 2 is a schematic flow diagram of the method for determining a flow in a primary’ loop of a reactor according to an embodiment;

[0020] FIG. 3 is a schematic sub-flow diagram of S202 in an embodiment;

[0021] FIG. 4 is a schematic flow diagram of a method for determining a flow in a primary loop of a reactor according to another embodiment;

[0022] FIG. 5 is a schematic diagram of a first head curve corresponding to a first head mapping function in an embodiment;

[0023] FIG. 6 is a schematic structural diagram of the primary loop of the reactor in an embodiment;

[0024] FIG. 7 is a structural block diagram of an apparatus for determining a flow in a primary loop of a reactor according to an embodiment; and

[0025] FIG. 8 is an internal structure diagram of a computer device according to an embodiment. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application are clearly and completely described with reference to the accompanying drawings in the embodiments of the present application, and apparently, the described embodiments are not all but only a part of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0027] A method for determining a flow in a primary loop of a reactor according to embodiments of the present application can be applied to an application environment shown in FIG. 1. In the application environment, a terminal 102 is communicated with a main pump 104 in the primary loop of the reactor. The method for determining a flow in a primary loop of a reactor according to the embodiments of the present application can be independently executed by the terminal 102 or a server, or cooperatively executed by the terminal 102 and the server, and a data storage system can store data required to be processed by the server. The data storage system may be integrated on the server, or may be arranged on a cloud or another network server. With independent execution by the terminal 102 as an example: a current rotating speed of the main pump in the primary loop of the reactor is obtained; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, a head of the main pump at the rated rotating speed is determined; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, a first head of the mam pump at the current rotating speed is determined, the first relationship being configured for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, a second head of the main pump at the current rotating speed is determined; and a value of the flow to be solved is determined according to the first head and the second head. The terminal 102 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices, and the Internet of Things devices may be smart speakers, smart televisions, smart air conditioners, smart vehicle-mounted devices, or the like. The portable wearable device can be a smart watch, a smart bracelet, a head-mounted device, or the like. The server may be implemented by a stand-alone server or a server cluster composed of a plurality of servers.

[0028] In an embodiment, as shown in FIG. 2, a method for determining a flow in a primary loop of a reactor is provided, the description is given with the method applied to a computer device (the computer device may be the terminal or the server in FIG. 1) as an example, and the method includes the following steps.

[0029] In S201, a current rotating speed of a main pump in the primary loop of the reactor is obtained.

[0030] The primary loop of the reactor is a loop apparatus that directly conducts heat out of the reactor. A coolant in the reactor circulates in the primary loop. The main pump is a rotary mechanical device in the primary loop of the reactor, and the main pump is configmed to cause the coolant in the primary loop of the reactor to form forced circulation, so that heat generated in the reactor is transferred to a steam generator to generate steam to push a steam turbine to do work. The computer device obtains the current rotating speed of the main pump in the primary loop of the reactor.

[0031] In S202, according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, a head of the main pump at the rated rotating speed is determined.

[0032] The rated rotating speed is a rotating speed of the main pump at rated power. The rated rotating speed of the main pump is a fixed value. Exemplarily, the rated rotating speed may be 1,480 rpm. The flow to be solved is a coolant flow of the main pump at the current rotating speed, for example, the flow to be solved may be the coolant flow in the primary loop of the reactor through any main pump. The flow to be solved is an unknown value to be solved. A number of the main pumps in the primary loop of the reactor is at least one. The at least one main pump may be of the same or different types. The head is an energy increment per unit weight of coolants from an inlet of the main pump to an outlet of the main pump. The head at a rated rotating speed refers to the head of the main pump at the rated rotating speed.

[0033] The first head mapping function is configured for indicating a corresponding relationship between a flow of the main pump at the rated rotating speed and the flow head of the main pump at the rated rotating speed. The flow of the main pump at the rated rotating speed refers to a coolant flow of the primary loop of the reactor when the main pump is at the rated rotating speed. The computer device determines 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 flow to be solved in the primary loop of the reactor, and the first head mapping function. Since the flow to be solved is unknown, the head of the main pump at the rated rotating speed is a function of the flow to be solved.

[0034] In S203, according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, a first head of the main pump at the current rotating speed is detennined, the first relationship being configured for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed.

[0035] The first relationship is configured 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. The computer device substitutes the current rotating speed of the main pump, the rated rotating speed of the main pump and the head of the main pump at the rated rotating speed into the first relationship, and takes an obtained calculation result as the first head of the main pump at the current rotating speed. The first head is configured to indicate a head of the main pump at the current rotating speed. Since the flow to be solved is unknown and the head of the main pump at the rated rotating speed is the function of the flow to be solved, the first head is a function of the flow to be solved.

[0036] In S204: according to the flow to be solved and a second head mapping function, a second head of the main pump at the current rotating speed is determined.

[0037] The second head mapping function is configured for indicating a corresponding relationship between a flow and the head of the main pump at any rotating speed. The flow to be solved refers to the flow of the main pump at the current rotating speed. The second head is a head of the main pump at the current rotating speed. The computer device substitutes the flow to be solved into the second head mapping function to obtain the second head of the main pump at the current rotating speed. Since the flow to be solved is unknown, the second head is a function of the flow to be solved.

[0038] In S205, a value of the flow to be solved is determined according to the first head and the second head.

[0039] Since the first head and the second head are both the heads of the main pump at the current rotating speed, values of the first head and the second head are equal. Since the first head is the function of the flow to be solved, the second head is the function of the flow to be solved, and the values of the first head and the second head are equal, the computer device can determine the value of the flow to be solved.

[0040] In the above method for determining a flow in a primary loop of a reactor, the current rotating speed of the main pump in the primary loop of the reactor is obtained; according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, the head of the main pump at the rated rotating speed is determined; according to the current rotating speed, the head of the main pump at the rated rotating speed, and the first relationship, the first head of the main pump at the current rotating speed is determined; according to the flow to be solved and the second head mapping function, the second head of the main pump at the current rotating speed is determined; and the value of the flow to be solved is determined according to the first head and the second head. According to the method, the head of the main pump at the rated rotating speed, the first head and the second head are respectively obtained according to the current rotating speed and the rated rotating speed of the main pump using the first head mapping function, the first relationship and the second head mapping function, and then, the value of the flow to be solved is determined, so that errors caused by flow meter measurement and pressure difference measurement are avoided, and a determination result of the flow in the primary loop of the reactor has high accuracy.

[0041] In an embodiment, as shown in FIG. 3, according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, determining the head of the main pump at the rated rotating speed includes the following steps S302 and S304.

[0042] In S302, the flow of the main pump at the rated rotating speed is determined according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor.

[0043] As is know n from characteristics of the main pump, a rotating speed of the main pump is in direct proportion to the coolant flow through the main pump. When there is only one main pump in the primary loop of the reactor, the flow to be solved in the primary loop of the reactor is equal to the coolant flow through the main pump. When there are two or more main pumps in the primary loop of the reactor, with the two or more main pumps of the same type as an example, the flow to be solved in the primary loop of the reactor is equal to the coolant flow through any main pump. In some embodiments, the two or more main pumps in the primary loop of the reactor are of different types, the coolant flows through the main pumps may be different, and the coolant flow through any main pump may be selected as the flow to be solved in the primary loop of the reactor.

[0044] The computer device determines the flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor. Since the flow to be solved is unknown, the flow of the main pump at the rated rotating speed is a function of the flow to be solved.

[0045] In S304, the head of the mam pump at the rated rotating speed is determined according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0046] The computer device substitutes the flow of the main pump at the rated rotating speed into the first head mapping function to obtain the head of the main pump at the rated rotating speed.

[0047] In this embodiment, the flow of the main pump at the rated rotating speed is determined according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor, and the head of the main pump at the rated rotating speed is determined according to the flow of the main pump at the rated rotating speed and the first head mapping function. The flow of the main pump at the rated rotating speed is the function of the flow to be solved, the head of the main pump at the rated rotating speed is the function of the flow to be solved, and the flow of the main pump at the rated rotating speed and the head of the main pump at the rated rotating speed are used for calculating the value of the flow to be solved, so that the errors caused by the flow meter measurement and the pressure difference measurement are avoided, and the determination result of the flow7 in the primary loop of the reactor has high accuracy.

[0048] In an embodiment, the first relationship is determined according to the following formula: where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump. HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents the head of the main pump at the current rotating speed.

[0049] According to the characteristics of the main pump, the head of the main pump is in direct proportion to a square of the flow of the main pump, and the flow rate of the main pump is in direct proportion to the rotating speed of the main pump, so that the first relationship can be obtained. In the first relationship, a ratio of the head of the main pump at any rotating speed to the head of the main pump at the rated rotating speed is equal to a square of a ratio of the rotating speed to the rated rotating speed. The first relationship is configured 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.

[0050] In this embodiment, based on the first relationship, the first head of the main pump at the current rotating speed may be determined and configured for calculating the value of the flow to be solved. The errors caused by the flow7 meter measurement and the pressure difference measurement are avoided, and the determination result of the flow in the primary loop of the reactor has high accuracy.

[0051] In an embodiment, determining the flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor includes:

[0052] determining the flow of the main pump at the rated rotating speed according to the follow ing formula: On = n Qn n where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0053] Since the flow of the main pump is in direct proportion to the rotating speed, the relationship that the ratio of the flow of the main pump at the current rotating speed to the flow' of the main pump at the rated rotating speed is equal to the ratio of the current rotating speed to the rated rotating speed of the main pump can be obtained. The flow of the main pump at the current rotating speed is the flow to be solved in the primary loop of the reactor. The computer device substitutes the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primaiy loop of the reactor into the above formula, thus the flow of the main pump at the rated rotating speed can be determined, that is: QN=^Qn.

[0054] In this embodiment, the flow of the main pump at the rated rotating speed is determined by adopting the formula according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor, and the flow of the main pump at the rated rotating speed is the function of the flow to be solved. The value of the flow to be solved is calculated based on the flow of the main pump at the rated rotating speed, so that the errors caused by the flow meter measurement and the pressure difference measurement are avoided, and the determination result of the flow in the primary loop of the reactor has high accuracy.

[0055] In an embodiment, determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function includes:

[0056] determining the head of the main pump at the rated rotating speed using the following first head mapping function: Hn(Qn) = Bo + ■ Qn + B2 ■ Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0057] The computer device substitutes the flow of the main pump at the rated rotating speed into the first head mapping function to determine the head of the main pump at the rated rotating speed. A method for determining the first head mapping function includes: in a hydraulic performance test of the main pump, according to experimental data of the head and the flow of the main pump, fitting the experimental data into a first head curve by adopting a curve fitting algorithm, a function corresponding to the first head cun c being 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 may have different Bo, Bt and B2, or may be other mapping relationships. The same type of main pumps correspond to the same first head mapping function.

[0058] In some embodiments, since Qn =~’Qn- Qn is substituted into the first head mapping function to obtain: Hn(Qn) = Bo + Bt ■ J■ Qn + B2 ■ (J■ Qn)2.

[0059] In this embodiment, the head of the main pump at the rated rotating speed is determined by adopting the first head mapping function according to the flow of the main pump at the rated rotating speed and the first head mapping function, so that the errors caused by the flow meter measurement and the pressure difference measurement are avoided, and the determination result of the flow in the primary loop of the reactor has high accuracy.

[0060] In an embodiment, according to the flow to be solved and the second head mapping function, determining the second head of the main pump at the current rotating speed includes:

[0061] determining the second head of the main pump at the current rotating speed using the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0062] A total pressure loss in the primary loop of the reactor includes a frictional resistance and a local resistance. For a complex system, the total pressure loss is a sum of the two losses. A formula for calculating the total pressure loss is as follows: △P = ?-|-p-u2 where AP represents a total pressure drop in Pa, p represents a coolant density in kg / m3, and u represents an average flow velocity of the coolant. For the same primary loop of the reactor, geometric parameters are the same, and factors influencing a total resistance coefficient are only the coolant density, kinematic viscosity, and the flow. A formula for calculating the Reynolds number is Re = u • d / v, and for the whole primary loop of the reactor, the relative Reynolds number is represented by Re*, and Re *= Qn / u. A relative value of the total resistance coefficient is represented by ^*.

[0064] When the Reynolds number of flowing of the coolant in the primary loop of the reactor is greater than a certain limit value, the total resistance coefficient of the primary’ loop of the reactor is hardly changed. That is, the total resistance coefficient of the same reactor is basically the same under different design working conditions. In some embodiments, the total resistance coefficient obtained through practical experiments is 158.5, and is substituted into a calculation formula of the total resistance coefficient to obtain: AP = 158.5 ■ ■ p ■ Qn2

[0065] The above calculation formula is transformed to obtain the following formula: 1 7 AP_ 158.5'2’p-Qn Pg Pg

[0066] Since Hn(Q„) = — Hn(Qn) =------= KQn2, p& p& , T- 158,5 where K =----. 2g

[0067] K is a constant, and a value of K can be continuously corrected according to a thermal balance test in a debugging test stage in an actual reactor running process, thereby improving the accuracy of the determination result of the flow.

[0068] In this embodiment, the second head of the main pump at the current rotating speed is determined by using the second head mapping function according to the flow to be solved and the second head mapping function. The value of the flow to be solved is determined based on the second head, so that the errors caused by the flow meter measurement and the pressure difference measurement are avoided, and the determination result of the flow in the primary loop of the reactor has high accuracy.

[0069] In order to explain the method for determining a flow in a primary loop of a reactor and an effect in this solution in detail, a most detailed embodiment is described below.

[0070] A current rotating speed of a main pump in the primary loop of the reactor is obtained. A flow of the main pump at a rated rotating speed is determined using the following formula according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor: On = n Qn N where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents N the flow of the main pump at the rated rotating speed. That is, QN = - ■ Qn-

[0071] FIG. 4 shows a schematic flow diagram of a method for determining a flow in a primary loop of a reactor according to another embodiment. According to a flow of the main pump at a rated rotating speed and a first head mapping function, the following first head mapping function is adopted to determine a head of the main pump at the rated rotating speed: Hn(Qn) = Bo + Bt • Qn + B2 • Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0072] For the first head mapping function, in a hydraulic performance test of the main pump, according to experimental data of the head and the flow of the main pump, the experimental data is fitted into a first head curve by adopting a curve fitting algorithm, and a function corresponding to the first head curve is the first head mapping function. Exemplarily, the experimental data may be fitted using MATLAB (Matrix Laboratory) software to obtain the first head curve.

[0073] FIG. 5 shows a schematic diagram of the first head curve corresponding to the first head mapping function, in which (a) (e.g., the diagram on the left in FIG. 5) is experimental data of running features of the main pump, an abscissa represents the flow, and an ordinate Hp(m) represents the head, (b) (e.g., the diagram on the right in FIG. 5) is the first head curve obtained by fitting the experimental data, and a function equation corresponding to the first head curve is H = Bo + Bx • Q + B2 ■ Q2. As can be seen from the fitted first head curve, a fitting effect of the flow in a region from 2,000m3 / h to 6,000m3 / h is good, and exemplarily, 3,600m3 / h can be selected as a working point of the main pump.

[0074] Since Qn = “ ’ Qn- Qn is substituted into the first head mapping function to obtain N           N 7 H.x(Qx) = Bo + Bt • - ■ Qn + B2 ■ (- • Qn)2

[0075] According to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, a first head of the main pump at the current rotating speed is determined, the first relationship being configured for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed. The first relationship is determined according to the following formula: Hn(Qn) = / nv2 Hn(Qn) W where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN(QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

[0076] Since HN(QN) = Bo + B, ■ • Qn + B2 ■ (^ ■ Qn)2 , HN(QN) is substituted into the first relationship to obtain zn\2          N          N Hn(Qn) = y ■ (Bo + Bt ■ - ■ Qn + B2 ■ (-■ Qn)2)

[0077] According to the flow to be solved and a second head mapping function, a second head of the main pump at the current rotating speed is determined according to the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of tire reactor, and K is a constant,

[0078] A value of the flow to be solved is determined according to the first head and the second head. Since the first head and the second head are both heads of the main pump at the current rotating speed, values of the first head and the second head are equal. Since the first head is the function of the flow to be solved, the second head is the function of the flow to be solved, and the values of the first head and the second head are equal, the value of the flow to be solved can be determined.

[0079] In some embodiments, the number of the main pumps in the primary loop of the reactor is m, and then, Hn(Qn) = K(mQn)2.

[0080] Since the values of the first head and the second head are equal, it can be obtained that: zn\2 N / N \ (-) ■ (Bo + Bt ■ -■ Qn + B2 ■ (- ■ Qn)2) = K(mQn)2 thereby obtaining the flow to be solved Qn: B Bx2 — 4 ■ (B2 - m2K) ■ Bo n 0 = r--1--—----------------------------'i ■ — 1 2(B2 — m2K) 2(B2 — m2K) J N

[0081] FIG. 6 shows a schematic structural diagram of the primary loop of the reactor. In some embodiments, m=2, Bo=57.29698, Bi=0.00432935, B2=-2.766005E-06, N=l,480, and then, the calculated flow to be solved is 1.462618 X 10 6 V7.449305 x 1011 + 1.046329 x 1C)4K 0 — (--1--■ n ^2.766005 x 10 6 + 4K 2.766005 x 10 6 + 4K 7

[0082] In the above method for determining a flow in a primary loop of a reactor, the current rotating speed of the main pump in the primary loop of the reactor is obtained; according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, the head of the main pump at the rated rotating speed is determined; according to the current rotating speed, the head of the main pump at the rated rotating speed, and the first relationship, the first head of the main pump at the current rotating speed is determined; according to the flow to be solved and the second head mapping function, the second head of the main pump at the current rotating speed is determined; and the value of the flow to be solved is determined according to the first head and the second head. According to the method, the head of the main pump at the rated rotating speed, the first head and the second head are respectively obtained according to the current rotating speed and the rated rotating speed of the main pump using the first head mapping function, the first relationship and the second head mapping function, and then, the value of the flow to be solved is determined, so that the errors caused by the flow meter measurement and the pressure difference measurement are avoided, and the determination result of the flow in the primary loop of the reactor has high accuracy. In addition, a pipe structure is avoided, a measuring meter based on a pipe interior throttling principle is not required to be arranged, an opening in a device pipe is avoided, an extra resistance is prevented from being introduced, and the risk of primary loop leakage is lowered. For the primary loop of a compact reactor, since the compact reactor has no main pipe and no elbow structure, the flow in the primary loop of the reactor cannot be measured by adopting an elbow flowmeter. The method for determining a flow in a primary loop of a reactor according to the present application can solve the problem of determining the flow of the primary loop of the compact reactor, and meanwhile can ensure the measurement accuracy of the flow. K in the flow to be solved is determined to be a dynamically adjustable coefficient, and can be continuously corrected during running of the reactor, so that the accuracy of the determination result of the flow is favorably improved, a thermal hydraulic calculation requirement can be met, and support is provided for safe running of a reactor core of the reactor.

[0083] It should be understood that, although the steps in the flow charts involved in the above embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. Unless explicitly stated herein, the steps are not limited to being performed in the exact order and may be performed in other orders. At least part of the steps in the flow charts involved in the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same moment, but may be performed at different moments, and the steps or the stages are not necessarily performed in sequence, but may be performed alternately with other steps or at least part of the steps or the stages in other steps.

[0084] Based on the same inventive concept, the embodiment of the present application further provides an apparatus for determining a flow in a primary loop of a reactor for implementing the above method for determining a flow in a primary loop of a reactor. The implementation solution for solving problems provided by the apparatus is similar to the implementation solution described in the above method, and therefore, for the definitions in one or more embodiments of the apparatus for determining a flow in a primary loop of a reactor provided below; reference can be made to the definitions of the method for determining a flow in a primary loop of a reactor in the above description, and the definitions are not repeated herein.

[0085] In an embodiment, as shown in FIG. 7, an apparatus 100 for determining a flow in a primary loop of a reactor is provided, including:

[0086] a data obtaining module 110 configured to obtain a current rotating speed of a main pump in the primary loop of the reactor;

[0087] a rated head determining module 120 configured to determine a head of the main pump at the rated rotating speed according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function;

[0088] a first head determining module 130 configured to determine a 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, the first relationship being configured for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed;

[0089] a second head determining module 140 configured to determine a second head of the main pump at the current rotating speed according to the flow to be solved and a second head mapping function; and

[0090] a flow determining module 150 configured to determine a value of the flow to be solved according to the first head and the second head.

[0091] In the above apparatus for determining a flow in a primary loop of a reactor, the current rotating speed of the main pump in the prim ary loop of the reactor is obtained; according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, the head of the main pump at the rated rotating speed is determined; according to the current rotating speed, the head of the main pump at the rated rotating speed, and the first relationship, the first head of the main pump at the current rotating speed is determined; according to the flow to be solved and the second head mapping function, the second head of the main pump at the current rotating speed is determined; and the value of the flow to be solved is determined according to the first head and the second head. According to the apparatus, the head of the main pump at the rated rotating speed, the first head and the second head are respectively obtained according to the current rotating speed and the rated rotating speed of the main pump using the first head mapping function, the first relationship and the second head mapping function, and then, the value of the flow to be solved is determined, so that errors caused by flow meter measurement and pressure difference measurement are avoided, and a determination result of the flow in the primary loop of the reactor has high accuracy.

[0092] In an embodiment, in the aspect of according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, determining the head of the main pump at the rated rotating speed, the rated head determining module 120 is further configured to: determine a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; and determine the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0093] In an embodiment, the first head determining module 130 is further configured to determine the first relationship according to the following formula: Hn(Qn) = Hn(Qn) W where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN(QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

[0094] In an embodiment, in the aspect of determining the flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor, the rated head determining module 120 is further configured to: determine the flow of the main pump at the rated rotating speed according to the following formula: On = n Qn N where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0095] In an embodiment, in the aspect of determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function, the rated head determining module 120 is further configured to: determine the head of the main pump at the rated rotating speed according to the following first head mapping function: Hn(Qn) = Bo + Bt ■ Qn + B2 ■ Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bx and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0096] In an embodiment, in the aspect of determining the second head of the main pump at the current rotating speed according to the flow to be solved 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 rotating speed according to the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0097] The modules in the above apparatus for determining a flow in a primary loop of a reactor may be wholly or partially implemented by software, hardware and a combination thereof. The modules may be embedded in or independent of the processor in the computer device in hardware, or may be stored in the memoiy in the computer device in software, such that the processor can conveniently call the modules to execute the operations corresponding to the modules.

[0098] In an embodiment, there is provided a computer device, which may be a terminal, an internal structure diagram of which may be shown in FIG. 8. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input apparatus. The processor, the memoiy, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input apparatus are connected to the system bus through the input / output interface. The processor of the computer device is configmed to provide computing and control capabilities. The memory of the computer device includes a non-transitory storage medium and an internal memory. The non-transitory storage medium stores an operating system and a computer program. The internal memoiy provides an environment for running of the operating system and the computer program in the non-transitory storage medium. The input / output interface of the computer device is configured to exchange information between the processor and an external device. The communication interface of the computer device is configured to be communicated with an external terminal in a wired or wireless mode, and the wireless mode can be implemented through WIFI, a mobile cellular network, NFC (near field communication), or other technologies. The computer program is executed by the processor to implement a method for determining a flow in a primary’ loop of a reactor.

[0099] Those skilled in the art will appreciate that the structure shown in FIG. 8 is only a block diagram of a part of the structure associated with the application solution and does not constitute a limitation on the computer device to which the application solution is applied, and a computer device may include more or fewer components than shown components, or combine certain components, or have a different arrangement of components.

[0100] In an embodiment, there is provided a computer device, including a memory and a processor, the memory storing a computer program, and the processor implementing the following steps when executing the computer program:

[0101] obtaining a current rotating speed of a main pump in the primary’ loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0102] In an embodiment, the processor also implements the following steps when executing the computer program:

[0103] determining a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; and determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0104] In an embodiment, the processor also implements the following steps when executing the computer program:

[0105] determining the first relationship according to the following formula: Hn(Qn) = Hn(Qn) W where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump. HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

[0106] In an embodiment, the processor also implements the following steps when executing the computer program:

[0107] determining the flow of the main pump at the rated rotating speed according to the following formula: Qn = n Qn N where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0108] In an embodiment, the processor also implements the following steps when executing the computer program:

[0109] determining the head of the main pump at the rated rotating speed according to the following first head mapping function: Hn(Qn) — Bq + Ek ■ Qn + B2 ■ Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0110] In an embodiment, the processor also implements the following steps when executing the computer program:

[0111] determining the second head of the main pump at the current rotating speed according to the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0112] In an embodiment, there is provided a computer-readable storage medium having a computer program stored therein, the computer program, when executed by a processor, implementing the following steps:

[0113] obtaining a current rotating speed of a main pump in the primary’ loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0114] In an embodiment, the computer program, when executed by the processor, also implements the following step: [0H5] determining a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; and determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0116] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0117] determining the first relationship according to the following formula: Hn(Qn) = / n\2 Hn(Qn) w where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN(QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

[0118] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0119] determining the flow of the main pump at the rated rotating speed according to the following formula: Qn = n Qn N where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0120] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0121] determining the head of the main pump at the rated rotating speed according to the following first head mapping function: Hn(Qn) = Bo +   ■ Qn + B2 ■ QN2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0122] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0123] determining the second head of the main pump at the current rotating speed according to the following second head mapping function: H„(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0124] In an embodiment, there is provided a computer program product including a computer program which, when executed by a processor, implements the following steps:

[0125] obtaining a current rotating speed of a main pump in the primary loop of the reactor; according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determining a head of the main pump at the rated rotating speed; according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed; according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; and determining a value of the flow to be solved according to the first head and the second head.

[0126] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0127] determining a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; and determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

[0128] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0129] determining the first relationship according to the following formula: Hn(Qn) = / n\2 Hn(Qn) w where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

[0130] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0131] determining the flow of the main pump at the rated rotating speed according to the following formula: On = n Qn n where n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

[0132] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0133] determining the head of the main pump at the rated rotating speed according to the following first head mapping function: Hn(Qn) = Bo +   ■ Qn + B2 ■ Qn2 where HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

[0134] In an embodiment, the computer program, when executed by the processor, also implements the following step:

[0135] determining the second head of the main pump at the current rotating speed according to the following second head mapping function: Hn(Qn) = KQn2 where Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

[0136] It should be noted that user information (including but not limited to user device information, user personal information, or the like) and data (including but not limited to data for analysis, stored data, displayed data, or the like) involved in the present application are information and data authorized by the user or sufficiently authorized by each parly, and collection, use and processing of relevant data require compliance with relevant laws, regulations and standards in relevant countries and regions.

[0137] It will be understood by those skilled in the art that all or part of the processes of the method according to the embodiments described above may be implemented by a computer program instructing related hardware, and the computer program may be stored in a non-transitory- computer-readable storage medium, and when executed, may include the processes of the embodiments of the method described above. Any reference to memories, databases or other media used in the embodiments of the present application can include at least one of a non-transitory memory and a transitory memory. The non-transitory memory may include a read-only memory (ROM), a magnetic tape, a floppy disk, a flash memory, an optical memory, a high-density embedded non-transitory memory a resistive random access memory (ReRAM), a magnetoresistive random access memory (MRAM), a ferroelectric random access memory (FRAM), a phase change memory’ (PCM), a graphene memory; or the like. The transitory memory can include a random access memory (RAM), an external cache memory, or the like. By way of illustration and not limitation, the RAM can take many forms, such as a static random access memory (SRAM), a dynamic random access memory (DRAM), or the like. The databases involved in the embodiments of the present application may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain-based distributed database, or the like. The processors referred to in the embodiments of the present application may include, but are not limited to, general processors, central processors, graphics processors, digital signal processors, programmable logic units, data processing logic units based on quantum calculations, or the like.

[0138] The technical features of the above-mentioned embodiments can be combined arbitrarily. In 5 order to make the description concise, not all possible combinations of the technical features are described in the embodiments. However, as long as there is no contradiction in the combination of these technical features, the combinations should be considered as in the scope of the specification.

[0139] The above-described embodiments are only several implementations of the present application, and the descriptions are relatively specific and detailed, but they should not be construed as limiting the 10 scope of the present application. It should be understood by those of ordinary skill in the art that various modifications and improvements can be made without departing from the concept of the present application, and all fall within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for determining a flow in a primary loop of a reactor, comprising:obtaining a current rotating speed of a main pump in the primary loop of the reactor;according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the priman loop of the reactor, and a first head mapping function, determining a head of the mam pump at the rated rotating speed;according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determining a first head of the main pump at the current rotating speed, the first relationship being configured for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed;according to the flow to be solved and a second head mapping function, determining a second head of the main pump at the current rotating speed; anddetermining a value of the flow to be solved according to the first head and the second head.

2. The method according to claim 1, wherein according to the current rotating speed, the rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and the first head mapping function, determining the head of the main pump at the rated rotating speed comprises:determining a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; anddetermining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

3. The method according to claim 1, wherein the first relationship is determined according to the following formula:Hn(Qn) = / n\2hn(Qn) wwherein n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

4. The method according to claim 2, wherein determining the flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor comprises:determining the flow of the main pump at the rated rotating speed according to the following formula:Qn = nQn Nwherein n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop of the reactor, and QN represents the flow of the main pump at the rated rotating speed.

5. The method according to claim 2, wherein determining the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function comprises:determining the head of the main pump at the rated rotating speed according to the following first head mapping function:Hn(Qn) = Bq + Ek ■ Qn + B2 ■ Qn2wherein HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2 are constants, and QN represents the flow of the main pump at the rated rotating speed.

6. The method according to claim 1, wherein according to the flow to be solved and the second head mapping function, determining the second head of the main pump at the current rotating speed comprises:determining the second head of the main pump at the current rotating speed according to the following second head mapping function:Hn(Qn) = KQn2wherein Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

7. An apparatus for determining a flow in a primary' loop of a reactor, comprising:a data obtaining module configured to obtain a current rotating speed of a main pump in the primary loop of the reactor;a rated head determining module configured to, according to the current rotating speed, a rated rotating speed of the main pump, the flow to be solved in the primary loop of the reactor, and a first head mapping function, determine a head of the main pump at the rated rotating speed;a first head determining module configured to, according to the current rotating speed, the head of the main pump at the rated rotating speed, and a first relationship, determine a first head of the main pump at the current rotating speed, the first relationship being used for indicating a relationship between a head of the main pump at any rotating speed and the head of the main pump at the rated rotating speed;a second head determining module configured to, according to the flow to be solved and a second headmapping function, determine a second head of the main pump at the current rotating speed; anda flow determining module configured to determine a value of the flow to be solved according to the first head and the second head.

8. The apparatus according to claim 7, wherein the rated head determining module is further configured to:determine a flow of the main pump at the rated rotating speed according to the current rotating speed, the rated rotating speed of the main pump and the flow to be solved in the primary loop of the reactor; anddetermine the head of the main pump at the rated rotating speed according to the flow of the main pump at the rated rotating speed and the first head mapping function.

9. The apparatus according to claim 7, wherein the first head determining module is further configured to:determine the first relationship according to the following formula:Hn(Qn) = / n\2hn(Qn) wwherein n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, HN (QN) represents the head of the main pump at the rated rotating speed, and Hn(Qn) represents a head of the main pump at the current rotating speed.

10. The apparatus according to claim 8, wherein the rated head determining module is further configured to:determine the flow of the main pump at the rated rotating speed according to the following formula:Qn = nQn ~Nwherein n represents the current rotating speed of the main pump, N represents the rated rotating speed of the main pump, Qn represents the flow to be solved in the primary loop ofthe reactor, and QN represents the flow of the main pump at the rated rotating speed.

11. The apparatus according to claim 8, wherein the rated head determining module is further configured to:determine the head of the main pump at the rated rotating speed according to the following first head mapping function:Hn(Qn) = B0 + B1-Qn+B2-Qn2wherein HN(QN) represents the head of the main pump at the rated rotating speed, Bo, Bt and B2are constants, and QN represents the flow of the main pump at the rated rotating speed.

12. The apparatus according to claim 7, wherein the second head determining module is further configured to:determine the second head of the main pump at the current rotating speed according to the following 5 second head mapping function:Hn(Qn) = KQn2wherein Hn(Qn) represents the head of the main pump at the current rotating speed, Qn represents the flow to be solved in the primary loop of the reactor, and K is a constant.

13. A computer device, comprising a memory and a processor, the memon storing a computer program, 10 and the processor implementing the steps of the method according to any one of claims 1 to 6 when executing the computer program.

14. A computer-readable storage medium having a computer program stored therein, the computer program, when executed by a processor, implementing the steps of the method according to any one of claims 1 to 6.15 15. A computer program product comprising a computer program, the computer program, whenexecuted by a processor, implementing the steps of the method according to any one of claims 1 to 6.INTERNATIONAL SEARCH REPORT International application No. PCT / CN2023 / I31840A. CLASSIFICATION OF SUBJECT MATTER G21C17 / 032(2006.01)i According to International Patent Classification (IPC) or to both national classification and IPC B. FIELDS SEARCHED Minimum documentation searched (classification system followed by classification symbols) IPC' G21C Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched Electronic data base consulted during the international search (name of data base and, where practicable, search terms used) CNTXT, ENTXTC, WPABS, DWPI, CJFD: WjS, BS, IK, flow, rotat+ speed, lift, function, equal, equation, rated, rating C. DOCUMENTS CONSIDERED TO BE RELEVANT Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. PX CN 116259428 A (CHINA GENERAL NUCLEAR POWER CO., LTD. et al.) 13 June 2023 (2023-06-13) claims 1-15 1-15 A A A CN 115182875 A (SHIMGE PUMP (ZHEJIANG) CO., LTD.) 14 October 2022 (2022-10-14) description, paragraphs [0023]-[0029] CN 112727742 A (NINGBO AUX ELECTRIC CO., LTD. et al.) 30 April 2021 (2021-04-30) entire document CN 113958516 A (HUAENG QUFU THERMAL POWER CO., LTD.) 21 January 2022 (2022-01-21) entire document 1-15 1-15 1-15 A CN 112560361 A (XIANGTAN UNIVERSITY) 26 March 2021 (2021-03-26) entire document 1-15 A JP 2009288231 A (KITAZAWA, Satoru) 10 December 2009 (2009-12-10) entire document 1-15 | | Further documents are listed in the continuation of Box C. | f | See patent family annex. * Special categories of cited documents: “T” later document published after the international filing date or priority “A” document defining the general state of the art which is not considered date and not in conflict with the application but cited to understand the to be of particular- relevance principle or theory underlying the invention “D” document cited by the applicant in the international application -‘X” document of particular relevance; the claimed invention cannot be “E" earlier application or patent but published on or after the international considered novel or cannot be considered to involve an inventive step filing date when the document is taken alone “L" document which may throw doubts on priority claim(s) or which is “Y” document of particular relevance; the claimed invention cannot be cited to establish the publication date of another citation or other considered to involve an inventive step when the document is special reason (as specified) combined with one or more other such documents, such combination “O” document referring to an oral disclosure, use, exhibition or other being obvious to a person skilled in the ait means document member of the same patent family “P” document published prior to the international filing date but later than the priority date claimed Date of the actual completion of the international search 11 January 2024 Date of mailing of the international search report 26 January 2024 Name and mailing address of the ISA / CN China National Intellectual Property Administration (ISA / CN) China No. 6, Xitucheng Road, Jimenqiao, Haidian District, Beijing 100088 Authorized officer Telephone No.INTERNATIONAL SEARCH REPORT Information on patent family membersInternational application No.PCT / CN2023 / I31840Patent document cited in search report Publication date (day / month / year) Patent family member) s) Publication date (day / month / year) CN 116259428 A 13 June 2023 None CN 115182875 A 14 October 2022 None CN 112727742 A 30 April 2021 None CN 113958516 A 21 January 2022 None CN 112560361 A 26 March 2021 None JP 2009288231 A 10 December 2009 None

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