JPS60238791A - Abnormality diagnostic system of nuclear power plant - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an abnormality diagnosis system for an atomic couplant.

[Prior art]

As a conventional abnormality diagnosis system for this kind of atomic converter, there is one shown in Fig. 1. In the figure, 1 is an atomic couplant that is the target of abnormality diagnosis.

2 is a plant data collection device that collects main plant data from the atomic couplant 1; 3 is a plant data collection device that compares the collected plant data with preset boundary values to determine whether or not an alarm state is present; 4 is an alarm display device for displaying the alarm state of the plant; 5 is a plant monitoring panel.

Next, the operation shown in FIG. 1 will be explained. atomic couplant 1
The main plant data is captured by the plant data collection device 2, and the collected data is sent to the alarm judgment device 3.
The collected plant data is compared with a preset alarm determination boundary value, and if the collected plant data exceeds the boundary value, it is determined that the system is in an alarm state. - Next, the results are displayed on the alarm display device fk4 installed on the plant monitoring panel 5, and by monitoring these conditions, plant operators can monitor the secondary system (water/steam system) of the nuclear power plant. Determine whether a breakage accident, etc. has occurred.

The conventional abnormality diagnosis system for nuclear couplers is configured as described above, so the operator determines whether a rupture accident has occurred in the secondary system based on the display status of the alarm display device. Even if the necessary information is displayed, the occurrence of an abnormality may be overlooked, and even if an abnormality occurs, unless the plant data value exceeds the alarm judgment boundary value, the alarm display device will not be activated. There were drawbacks such as the fact that it took a long time to determine that there was an abnormality because the condition did not change.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it calculates the deviation value between the data collected during nuclear coupler operation and the output value of the verification model, and if the deviation value exceeds the boundary value, By automatically identifying the type of breakage accident that occurred based on the code of the matching model,
The purpose of the present invention is to provide an abnormality diagnosis system for an atomic couplant that allows operators to quickly identify the cause of an abnormality with high reliability.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the same parts as in FIG. 1 are indicated by the same reference numerals. In FIG. A plant abnormality determination device uses the comparison model output value to determine whether a rupture accident has occurred in the secondary system of the plant, and 8 is a CRT display device that displays the plant abnormality determination results.

Next, the operation of this invention will be explained below. FIG. 3 shows a schematic flowchart of the abnormality diagnosis function, and the function of each step will be explained below. First, Step ■: Collect main plant data from the target atomic couplant at regular intervals.

Step (2): Since it is necessary to set the initial value of the collation model before starting the abnormality diagnosis, it is determined whether or not it is necessary to set the initial value by checking whether it is the start point of the abnormality diagnosis.

Step ■: Input the collected plant data and determine the initial value of the comparison model by solving an algebraic equation in which the differential term of the differential equation is set to zero.

Step ■: Using the collected plant data and the calculation results obtained at the time step before the previous data collection (however, the default values at the start of abnormality diagnosis) as input, create a verification model that is assumed to be normal. to calculate the current output of the matching model. Matching model 1
An example of the system configuration (secondary system of pressurized water type atomic couplant) is shown in Fig. 4. The verification model is composed of differential equations and algebraic equations established based on physics, and can be used to faithfully simulate the dynamic characteristics of a plant. Further, as shown in FIG. 4, the steam generator primary side inlet flow jk/temperature is used as boundary value data with the primary system.

Step (2): When the deviation value of each monitored plant data (collected data value - comparison model output value) exceeds a predetermined boundary value, the type of breakage accident that has occurred is identified based on its sign. An example of the breakage accident identification algorithm used at this time is shown in FIG.

In each of the above steps, step (2) is performed in the plant data collection device 2, and steps (2) and (2) are performed in the plant data collection device 2.

Step (2) is performed in the verification model output generator 6, and step (2) is performed in the plant abnormality determination device 7, and the results of the abnormality determination are displayed on the CRT display &8 installed on the plant monitoring panel 5 and shown to the operator. be informed.

Although the above example describes a case of a rupture accident in the secondary system of a pressurized water type atomic couplant, the same effects as in the above example can be achieved for other plants where a rupture accident may occur. . Furthermore, the same effects as in the above embodiments can be achieved for the diagnosis of an abnormal event in which the type of abnormal accident can be identified by knowing the sign of the deviation value between the collected data value and the comparison model output value.

〔Effect of the invention〕

As described above, according to the present invention, the deviation value between the collected data of the atomic couplant and the comparison model output value is calculated, and when the deviation value exceeds the boundary value, the rupture accident that has occurred is calculated based on the sign of the deviation value. By identifying the type, the operator can quickly and reliably identify the cause of the abnormality.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a conventional abnormality diagnosis system. FIG. 6 is a block diagram of an abnormality diagnosis system according to an embodiment of the present invention, FIG. 3 is a 70-chart diagram showing an outline of the abnormality diagnosis function according to the present invention, and FIG. 4 is an example of a collation model. The system configuration diagram, FIG. 5, is an example of an abnormality cause identification algorithm diagram. DESCRIPTION OF SYMBOLS 1... Atomic couplant, 2... Plant data collection device, 3... Alarm judgment device, 4... Alarm display device, 5... Plant monitoring panel, 6... Collation model output generation device , 7... Plant abnormality determination device, 8... CR
T display device. Figure 1 Demon 2 Figure 3

Claims (1)

[Claims] a plant data collection device that collects main plant data from an atomic couplet that is a target of abnormality diagnosis; a verification model output generator that uses the collected plant collection data as input and calculates an output of a verification model; Calculate the deviation value between the plant collected data value and the output value of the comparison model output generator, and when the deviation value exceeds a preset boundary value, a rupture accident occurs based on the sign of exceeding the boundary value. An abnormality diagnosis system for an atomic coupler, comprising: a plant abnormality determination device for identifying the type of plant abnormality determination device; a CRT display device for displaying the output results of the plant abnormality determination device; and a plant monitoring panel on which the CRT display device is installed.