Engineering test method and tool for LOCA margin monitoring

Abstract

The invention relates to an engineering test method and tool for LOCA margin monitoring. The method comprises the following steps: S1, determining a test case required by an engineering test; and S2, performing assignment operation on the corresponding communication points according to the test cases so as to simulate the condition of the reactor under the corresponding working condition. And S3, related operation result information is received. Wherein the related operation result information is obtained by acquiring data of each communication point through the LOCA monitoring system and calculating all the acquired data by using a preset LOCA algorithm. According to the method, manual assignment operation of testers is replaced by an automatic assignment mode, so that the test time is greatly shortened, the test work is optimized, the test process is simplified, and the test efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power instrumentation and control engineering testing, and in particular to an engineering testing method and tool for LOCA margin monitoring. Background Art

[0002] In nuclear power plants, the LOCA monitoring system (Loss Of Coolant Accident Surveillance System, also known as the Loss Of Coolant Accident Surveillance System, hereinafter referred to as the "LSS system") is a subsystem of the RPN system (nuclear instrumentation system) of the relevant unit, which is used to monitor the operating status of the reactor and trigger an alarm signal when an abnormal situation occurs to remind and assist the operator to control the reactor status. The acquisition, processing, calculation, and communication equipment of the LSS system are all integrated and installed in the RPN006AR cabinet. The LSS system exchanges data with the NC-DCS system (non-safety-level digital instrumentation and control system) through network communication. The system uses a gateway board (active and standby redundancy) to process signals from each system.

[0003] Almost all input and output signals of the LSS system need to communicate with the NC-DCS system. The two systems communicate point-to-point through the MOUDBUS-TCP protocol. At present, when conducting engineering tests, testers need to find the location of each communication point in the project according to the database and manually assign values ​​one by one to test each use case. This work occupies most of the test work and seriously wastes test time. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an engineering test method and tool for LOCA margin monitoring.

[0005] The technical solution adopted by the present invention to solve the technical problem is: an engineering test method for LOCA margin monitoring, comprising the following steps:

[0006] S1. Determine the test cases required for engineering testing;

[0007] S2. performing value assignment operations on corresponding communication points according to the test case to simulate the situation of the reactor under the corresponding working condition;

[0008] S3, receiving relevant operation result information;

[0009] The relevant operation result information is obtained by collecting data of each communication point through the LOCA monitoring system and calculating all the collected data using a preset LOCA algorithm.

[0010] Further, in the engineering test method for LOCA margin monitoring of the present invention, step S1 comprises:

[0011] The serial number of the test case inputted through the user terminal is received, and the test case required for the engineering test is searched from the database according to the serial number.

[0012] Further, in the engineering test method for LOCA margin monitoring of the present invention, step S2 includes:

[0013] According to the test case, the corresponding signal variables are automatically assigned values, and the signal variables that have completed the assignment operation are written into the corresponding communication points through batch processing to simulate the situation of the reactor under the corresponding working conditions; the signal variables correspond to the communication points one by one.

[0014] Further, in the engineering test method for LOCA margin monitoring of the present invention, the method further includes:

[0015] The relevant operation result information is displayed through the local operation station of the LOCA monitoring system.

[0016] Furthermore, in the engineering test method for LOCA margin monitoring described in the present invention, the relevant operation result information includes at least one of LOCA margin, intermediate value, alarm information, and equipment fault diagnosis information.

[0017] In addition, the present invention also provides an engineering test tool for LOCA margin monitoring, which is applied to non-safety-level digital instrumentation and control systems, including:

[0018] Determine the unit, which is used to determine the test cases required for engineering testing;

[0019] A program organization unit, used for performing value assignment operations on corresponding communication points according to the test case to simulate the situation of the reactor under the corresponding working condition;

[0020] A receiving unit, used for receiving relevant operation result information;

[0021] The relevant operation result information is obtained by collecting data of each communication point through the LOCA monitoring system and calculating all the collected data using a preset LOCA algorithm.

[0022] Furthermore, in the engineering test tool for LOCA margin monitoring of the present invention, the determining unit is used to receive the serial number of the test case input through the user terminal, and search the database for the test case required for the engineering test according to the serial number.

[0023] Furthermore, in the engineering test tool for LOCA margin monitoring described in the present invention, the program organization unit is used to automatically assign values ​​to corresponding signal variables according to the test case, and write the signal variables that have completed the assignment operation into corresponding communication points through batch processing to simulate the situation of the reactor under corresponding working conditions; the signal variables correspond one-to-one to the communication points.

[0024] Furthermore, in the engineering test tool for LOCA margin monitoring described in the present invention, the engineering test tool is developed and used based on the MACS620 platform.

[0025] Furthermore, in the engineering test tool for LOCA margin monitoring described in the present invention, the relevant calculation result information includes at least one of LOCA margin, intermediate value, alarm information, and equipment fault diagnosis information.

[0026] The engineering test method and tool for LOCA margin monitoring of the present invention have the following beneficial effects: the present invention replaces the manual value assignment operation of the tester with an automatic value assignment method, which greatly reduces the test time, optimizes the test work, simplifies the test process, and improves the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0028] Figure 1 It is a flow chart of an engineering test method for LOCA margin monitoring provided by one embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of data transmission between systems provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0031] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0033] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present invention, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. It is not necessarily required or implied that there is any such actual relationship or order between these entities or operations.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0035] In the present invention, the Modbus communication protocol is an industrial field bus protocol standard. The Modbus communication protocol has multiple variants, including multiple versions supporting serial ports and Ethernet, mainly three types: Modbus RTU, Modbus ASCII and Modbus TCP. Logical configuration refers to setting the function of the device according to needs so that it works under a specific functional condition. Margin refers to the margin between the current actual working condition of the core and the working condition that may cause core damage.

[0036] In a preferred embodiment, the engineering test tool for LOCA margin monitoring of this embodiment can be preferably developed and used based on the MACS620 platform and applied to non-safety-level digital instrumentation and control systems, mainly including:

[0037] The determination unit is used to determine the test cases required for the engineering test, that is, to determine the engineering test cases so that the system can simulate the conditions of the reactor under other working conditions according to the corresponding test cases.

[0038] Specifically, the determination unit is used to receive the serial number of the test case input through the user terminal, and search the database for the test case required for the engineering test according to the serial number.

[0039] The program organization unit is used to assign values ​​to corresponding communication points according to test cases to simulate the situation of the reactor under corresponding working conditions.

[0040] It should be noted that a communication point refers to a specific location or interface in a system or device for communication or data exchange. The definition of a communication point usually includes information such as communication protocol, data type, address, etc. to ensure correct data exchange and communication. Programming Organisation Unit (POU) is an important and widely used basic IEC programming unit in the IEC61131-3 standard. The program organization unit consists of three types of basic units: program, function block, and function.

[0041] Specifically, the program organization unit is used to automatically assign values ​​to corresponding signal variables according to the test cases, and write the signal variables that have completed the assignment operation to the corresponding communication points in a batch processing manner to simulate the situation of the reactor under the corresponding working conditions. The signal variables correspond to the communication points one by one.

[0042] The receiving unit is used to receive relevant operation result information. The relevant operation result information is obtained by collecting data from each communication point through the LOCA monitoring system (LSS system), and calculating all the collected data using the preset LOCA algorithm. Exemplarily, the relevant operation result information includes but is not limited to LOCA margin, intermediate value, alarm information, equipment fault diagnosis information, etc. In other words, the LOCA monitoring system sends the results, intermediate values, alarm information, equipment fault diagnosis and other information calculated by the LOCA special algorithm to the NC-DCS system for relevant alarms. As an option, the relevant operation result information can also be displayed through the local operation station of the LOCA monitoring system.

[0043] It should be noted that the LSS system is equipped with a LEVEL1 gateway to communicate with the NC-DCS system. Communicate with the NC-DCS system: receive signals from the DCS, process data in the computer, transmit the results to the DCS, and display and alarm on the KIC (power plant computer information and control system). At the same time, send C21 signals to the RGL system (Rod Position Indicating and Rod Control System) through hard wiring connection.

[0044] The LSS system collects data from each communication point, that is, receives signals from the DCS. For example, Table 1 shows some of the collected signal variables.

[0045] Table 1

[0046]

[0047] The above data requires point-to-point data transmission between both systems through MOUDBUS-TCP protocol, including a total of 112 data communication points including quality bits. The LSS system obtains the operating data of the reactor through the NC-DCS system, and uses its own algorithm to send the calculation results to the NC-DCS and display them in the local OPS. In the past, when conducting engineering tests, testers needed to assign values ​​to each data one by one on the NC-DCS test platform to simulate the operating conditions of the reactor under other working conditions. This took up a lot of test time and seriously affected the test efficiency.

[0048] In this embodiment, the semi-automatic test tool based on the MACS620 platform automatically assigns values ​​to the input data of the LSS system on the MACS620 platform of the NC-DCS system according to the test case. The tester only needs to enter the number corresponding to the test case, and the test tool can automatically assign values ​​to the corresponding data and pass it into the LSS system for calculation. This embodiment replaces the manual assignment operation of the tester by the automatic assignment method, which greatly reduces the test time and optimizes the test work. Moreover, the test tool of this embodiment is easy to maintain, and the tester can modify the value of the data according to user needs; it is highly portable and can be executed at any communication station of the MACS620 platform.

[0049] In a specific implementation, the engineering test tool uses the engineering POU written by the logical configuration characteristics of the MACS620 platform. The MACS620 platform logical configuration function is used to complete the data assignment operation for each test case, reduce manual operations, and realize semi-automatic data processing. Specifically, in the logical POU, batch processing operations are performed on each data transmitted from the NC-DCS system to the LSS system. That is, these data are forced to operate in the CPR1000LSSTEST function block in the form of code assignment according to the test case, and are transmitted to the LSS system through MOUDBUS-TCP for calculation. For example, the data in Table 1 (IMIN, PR, TBC, TBF, etc.) are automatically assigned by the algorithm in the CPR1000LSSTEST function block, and the POU then writes the results into the communication point (PY1***.AI / PY1***.DI) and passes them to the LSS system.

[0050] For example, the following is part of the code of the CPR1000LSSTEST function block:

[0051] IF ABS(ENABLE-6.1101)<0.00001THEN

[0052] FOR K:=1T0 3DO

[0053] TBC[K].AV:=327.9;

[0054] TBC[K].Q:=FALSE;

[0055] TBF[K].AV:=291.3;

[0056] TBF[K].Q:=FALSE;

[0057] P[K].AV:=15.5;

[0058] P[K].Q:=FALSE;

[0059] VPP[K].AV=1482.0;

[0060] VPP[K].Q:=FALSE;

[0061] END_FOR;

[0062] IF ABS(RESULT.PTH AV-1.0)<DELTA THEN

[0063] ERR[1]:=FALSE;

[0064] ELSE ERR[1]:=TRUE;

[0065] END_IF;

[0066] ELSIF ABS(ENABLE-6.1102)<0.00001THEN

[0067] FOR K:=1TO 3DO

[0068] TBC[K].AV:=300.0;

[0069] TBC[K].Q:=FALSE;

[0070] TBF[K].AV:=280.0;

[0071] TBF[K].Q:=FALSE;

[0072] P[K].AV:=15.0;

[0073] P[K].Q:=FALSE;

[0074] VPP[K].AV=1458.0;

[0075] VPP[K].Q:=FALSE;

[0076] END FOR;

[0077] IF ABS(RESULT.PTH.AV-0.5)<DELTA THEN

[0078] ERR[2]:=FALSE;

[0079] ELSE ERR[2]:=TRUE;

[0080] END IF;…….

[0081] like Figure 2 As shown, in the previous LSS system engineering test, the tester needs to assign values ​​to each communication data one by one at the engineer station of the NC-DCS system, and then the NC-DCS communication station transmits it to the LSS system. The semi-automatic test tool of the present invention adds POU to the NC-DCS communication station and innovates the assignment logic. The tester can directly use the semi-automatic test tool in the NC-DCS communication station to assign values ​​to the communication data in batches.

[0082] This embodiment replaces the manual assignment operation of the tester with an automatic assignment method, which greatly reduces the test time, optimizes the test work, simplifies the test process, and improves the test efficiency.

[0083] In another preferred embodiment, reference Figure 1 The engineering test method for LOCA margin monitoring of this embodiment includes the following steps:

[0084] S1. Determine the test cases required for the engineering test. Specifically, in this step, the serial number of the test case input through the user terminal can be received, and the test case required for the engineering test can be searched from the database according to the serial number.

[0085] S2. Assign values ​​to corresponding communication points according to the test case to simulate the situation of the reactor under the corresponding working condition. Specifically, in this step, the corresponding signal variables can be automatically assigned values ​​according to the test case, and the signal variables that have completed the assignment operation are written to the corresponding communication points in a batch processing manner to simulate the situation of the reactor under the corresponding working condition. The signal variables correspond to the communication points one by one.

[0086] S3, receiving relevant calculation result information. The relevant calculation result information is obtained by collecting data from each communication point through the LOCA monitoring system, and calculating all the collected data using the preset LOCA algorithm. Exemplarily, the relevant calculation result information includes but is not limited to LOCA margin, intermediate value, alarm information, equipment fault diagnosis information, etc. In other words, the LOCA monitoring system sends the results, intermediate values, alarm information, equipment fault diagnosis and other information calculated by the LOCA special algorithm to the NC-DCS system for relevant alarms. As an option, the relevant calculation result information can also be displayed through the local operation station of the LOCA monitoring system.

[0087] This embodiment replaces the manual assignment operation of the tester with an automatic assignment method, which greatly reduces the test time and optimizes the test work. Moreover, the tester can modify the value of the data according to user needs; it has strong portability.

[0088] As an option, the engineering test tool may only include the determination unit and the program organization unit, or even only include the program organization unit, and then the receiving unit is a non-safety-level digital instrumentation and control system. When the engineering test tool of the present invention only includes the program organization unit, it can be stored in a computer-readable storage medium, and the computer-readable storage medium can be a U disk, a mobile hard disk, a read-only memory (ROM), a disk or an optical disk, and other computer-readable storage media that can store program codes.

[0089] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0090] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0091] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, the above technical features can be freely combined without departing from the concept of the present invention, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the coverage of the claims of the present invention.

Claims

1. An engineering test method for LOCA margin monitoring, characterized in that: The following steps are involved: S1. Determine the test cases required for engineering testing; S2. performing value assignment operations on corresponding communication points according to the test case to simulate the situation of the reactor under the corresponding working condition; S3, receiving relevant operation result information; The relevant operation result information is obtained by collecting data of each communication point through the LOCA monitoring system and calculating all the collected data using a preset LOCA algorithm.

2. The engineering test method for LOCA margin monitoring according to claim 1, characterized in that: Step S1 includes: The serial number of the test case inputted through the user terminal is received, and the test case required for the engineering test is searched from the database according to the serial number.

3. The engineering test method for LOCA margin monitoring according to claim 1, characterized in that: Step S2 includes: According to the test case, the corresponding signal variables are automatically assigned values, and the signal variables that have completed the assignment operation are written into the corresponding communication points through batch processing to simulate the situation of the reactor under the corresponding working conditions; the signal variables correspond to the communication points one by one.

4. The engineering test method for LOCA margin monitoring according to claim 1, characterized in that: The method further includes: The relevant operation result information is displayed through the local operation station of the LOCA monitoring system.

5. The engineering test method for LOCA margin monitoring according to claim 1 or 4, characterized in that: The relevant operation result information includes at least one of LOCA margin, intermediate value, alarm information, and equipment fault diagnosis information.

6. An engineering test tool for LOCA margin monitoring, applied to non-safety-level digital instrumentation and control systems, characterized in that: include: Determine the unit, which is used to determine the test cases required for engineering testing; A program organization unit, used for performing value assignment operations on corresponding communication points according to the test case to simulate the situation of the reactor under the corresponding working condition; A receiving unit, used for receiving relevant operation result information; The relevant operation result information is obtained by collecting data of each communication point through the LOCA monitoring system and calculating all the collected data using a preset LOCA algorithm.

7. The engineering test tool for LOCA margin monitoring according to claim 6, characterized in that: The determining unit is used to receive the serial number of the test case input through the user terminal, and search the test case required for the engineering test from the database according to the serial number.

8. The engineering test tool for LOCA margin monitoring according to claim 6, characterized in that: The program organization unit is used to automatically assign values ​​to corresponding signal variables according to the test cases, and write the signal variables that have completed the assignment operation into corresponding communication points by batch processing to simulate the situation of the reactor under corresponding working conditions; the signal variables correspond one to one to the communication points.

9. The engineering test tool for LOCA margin monitoring according to claim 6, characterized in that: The engineering test tool is developed and used based on the MACS620 platform.

10. The engineering test tool for LOCA margin monitoring according to claim 6, characterized in that: The relevant operation result information includes at least one of LOCA margin, intermediate value, alarm information, and equipment fault diagnosis information.

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