JPS62200293A - Operation knowledge base extension method of accident dealing device for nuclear power plant utilizing capacity development device - 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] [Objective of the Invention] (Field of Application of the Invention) The present invention is directed to expanding the response capability of an accident response device to enable operators to take appropriate response actions in the event of an abnormality or accident in a nuclear power plant. It is about the method.

(Prior art and its problems) In nuclear power plants, it is necessary to prevent abnormalities and accidents caused by operational errors such as operational errors, and
When an abnormality or accident occurs, accurately grasping the state of the plant and taking appropriate response operations will minimize the spread of the abnormality or accident and bring the situation under control. This is the key to ensuring plant safety and operation. This is an issue that is indispensable for improving the reliability of railways.

In addition, in order to overcome these issues, it is necessary to instruct operators on appropriate response procedures to support their judgment, especially in the event of an abnormality or accident, and to provide instructions on a daily basis to have operators carry out the instructed response operations. Education and training is essential.

Therefore, conventionally, an accident response bag WA such as the system diagram shown in Figure 1 has been used to monitor plant operation 41[, and at the same time diagnose the state of the plant in the event of an abnormality or accident, and provide the results and operation guides. Proposals have been made to display this information to notify operators to ensure safe operation.

On the other hand, a capability development device B as shown in the system diagram shown in Figure 2 is also installed to create simulated transient responses of various abnormalities and accidents that have occurred in the past, as well as possible unprecedented abnormal accidents. Education and training is carried out by having operators practice operations to respond to known transient responses, and having experienced operators perform operations to respond to unknown transient responses, and determining the quality of their response. There is.

In FIG. 1, (1) is a nuclear power plant, and (2) is a plant data collection processing circuit, which collects state quantities from the nuclear power plant (1), such as reactor output.

Receives necessary analog information signals for abnormalities and accidents such as feed water flow rate, main steam flow rate, reactor water level, recirculation flow rate, etc.
This is converted into a level digital signal suitable for calculation. (3) is an abnormality/accident detection circuit, and (4) is an operating knowledge base circuit, which has an arithmetic circuit with memory and its attached circuits. Plant design data, basic operating principles (such as various physical laws), appropriate operating knowledge acquired by experienced operators, and operating procedures for dealing with abnormal accidents are stored as rules. (5) is an inference calculation circuit, which includes an abnormal accident cause identification circuit (5a), a treatment guide circuit (5b), and the like.

The abnormal accident detection circuit (3) converts the digitized plant state quantity from the plant data collection processing circuit (2) into an abnormality judgment value given by the plant design data stored in the operation knowledge base circuit (5). A comparison is made to detect an abnormality, and when an abnormality is detected, the inference calculation circuit (5) is activated. The abnormal accident cause identification circuit (5a) of the inference calculation circuit (5) is connected to the plant data collection processing circuit (2).
) is used to diagnose the state of the plant by comparing it with various types of knowledge previously stored in the operating knowledge base circuit (4) based on a predetermined calculation program, and to identify the cause of the abnormal accident. In addition, the treatment guide circuit (5b
) calculates the current value of the plant state quantity and its change tendency, and again compares it with the knowledge stored in the operation knowledge base circuit (4), and then sends the operation knowledge base circuit (4) to take any necessary measures in the future. Select from the memory contents of . (6) is a consultation circuit, (7) is a display device,
CRT display device f (7a) and output printing device (7a)
b) and a storage device f (7c) such as a magnetic disk. At all times, these are used to visually display, print, or store the plant's operating status quantities.
It enables operation status monitoring and data storage, and in the event of an abnormality, diagnosis results and treatment guides can be visually displayed at the same time as the plant state quantities.
) and have them take countermeasures. In addition, if necessary, the driving knowledge base circuit (4) can be accessed via the sun cortision circuit (6) and the inference calculation circuit (5), and the cause of abnormal accidents and the basis for treatment can be obtained through dialogue. In this way, constant monitoring of the operating status of the plant described above,
Diagnosis results and operating procedures are displayed to ensure complete operation. In Fig. 2, (9) is a plant dynamic characteristic calculation circuit (for example, a simulator), QGI is a response circuit, and 0
Reference numeral 11 denotes a display device, which includes, for example, a CRT display device (lla) and an output printing device (Ilb).
, a storage device (llc), etc. Then, the plant dynamic characteristic calculation circuit (9) creates simulations of transient responses of various abnormal accidents that have occurred in the past as well as new abnormal accidents that can be considered, displays them on the CRT display device (lla), and operates using the response circuit 0. At the same time, the operator (8) is made to perform the operation, and at the same time, the operating state and subsequent transient response are recorded in the output printing device (Ilb) and the storage device (llc), and are used as study materials for training of the operator.

But what about the accident handling bag mentioned above? IfA is installed within the nuclear power generation platform, whereas capacity development equipment B is installed separately from the nuclear power generation plant, so new knowledge about unknown transient responses is accumulated as the operating experience of individual operators. only. On the other hand, the driving experience and knowledge regarding operating procedures accumulated in the driving knowledge circuit (4) of the accident response device are fixed to what the operator has experienced in the past, and the causes of abnormal accidents other than the accumulated knowledge can be identified. It has the disadvantage that it cannot provide treatment guidance.

Therefore, in order to further improve the reliability of the plant in the event of an abnormality or accident, and to maintain and improve the average operating rate of 74.2% of nuclear power plants that was achieved in Japan last year, we must rely solely on past experience. The contents of the driving knowledge base circuit are insufficient, and some measures are needed to expand the knowledge base. The present invention has been made for the purpose of providing a method for expanding driving knowledge that can meet the demands of abnormalities, and will next be described in detail with reference to the drawings.

[Structure of the invention]

(Means and operations for solving the problems) The feature of the present invention is that, as shown in FIG. In addition, the response operations of experienced operators and subsequent transient responses to possible new abnormalities and accidents that have never been seen before are explained.
By providing a new knowledge writing circuit C to be stored in the driving knowledge base circuit (4), new knowledge obtained using the ability development device can be stored in the memory of the arithmetic circuit of the driving knowledge base circuit (4). By doing so, the knowledge can be expanded, thereby improving the diagnostic treatment performance of the accident handling device A. Next, an example will be explained.

(Embodiment) FIG. 4 is a system diagram of an embodiment of the present invention. A in the figure is an accident handling device, which, like in Figure 1, includes a plant data collection processing circuit (2), an abnormality detection circuit (3), an operation knowledge base circuit (4), an inference calculation circuit (5), and a consultation circuit ( 6), various display devices (7), etc. B
2 is a capability development device, which is a plant dynamic characteristic calculation circuit, such as a simulator (9), as shown in FIG.

It is composed of a response circuit aω1, a display device aυ, and the like. C is a new knowledge writing circuit, which is composed of the following parts.

0 is an input switching circuit, 01 is an input processing circuit, 041 is an operation response storage circuit, 0L51 is a collation search circuit, (16) is a rule forming circuit, and 071 is a writing circuit. In the human power processing circuit a1, a new transient response is created in the plant dynamic characteristic calculation circuit (9), and the new operation and response information by the skilled operator (8) is taken in via the input switching circuit 021 that is turned on at this time, and the operation response is stored. It is converted into a signal having the level required for writing to circuit 04). And memory circuit 04
1 temporarily captures and stores the signal of the human power processing circuit a;
A comparison search circuit Q41 searches for all the records by comparing them with the contents of the driving knowledge base circuit (4) to see if they are new ones that are not included in the knowledge stored in the driving knowledge base circuit (4). When this is recognized as new, it is added to the rule-forming circuit θ6) and made into a rule, and then the writing circuit θη is used to store it in the memory of the driving knowledge base B (4), thereby expanding the knowledge content. This is how it was done.

In addition, by separating the ability development device B from the new knowledge writing circuit C using the input switching circuit Q21, the ability development device can be operated in a mere simulator mode, and can be used for skill development of inexperienced operators as before. It has been made possible.

(Modified Example) The present invention has been described above with reference to one embodiment. However, as shown by the broken line in FIG. and connect it, turn off the manual switching circuit Q2), and turn off the input switching circuit OI.
By turning on the operating knowledge base circuit (4), the knowledge stored in the operating knowledge base circuit (4) is used to create a transient response and the operator (8)
Education and training can also be provided.

(Effects) As described above, the present invention extracts the knowledge of experienced operators regarding possible new abnormal accidents and imports it into the operating knowledge base circuit of the accident handling device at any time, thereby expanding the knowledge content for plant condition diagnosis and accident handling. Therefore, the diagnostic and treatment performance of the accident response device can be strengthened through daily driving training. Therefore, the credibility of the nuclear power plant can be improved more than ever before.

[Brief explanation of drawings]

Fig. 1 is a block system diagram of the accident handling device, Fig. 2 is a block system diagram of the ability development device, Fig. 3 is a principle system diagram of the present invention, and Fig. 4 is a block system diagram of an embodiment of the present invention. . (1,)... Nuclear power plant, (2)... Plant data collection processing circuit, (3)... Abnormality detection circuit,
(4)...Driving knowledge base circuit, (5)...Inference calculation circuit, (6)...Consultation circuit, (7)...
... Display device, (8) ... Operator, (9) ... Plant dynamic characteristic calculation circuit, 00) ... Response circuit, 00.
...Display device, A...Accident response device, B...Ability development device, C...Circuit for writing new knowledge, Surface...Manual switching circuit, 01...Input processing circuit, 04) . . . Operation response storage circuit, (15) . . . Verification search circuit, a’s .

Claims (1)

[Claims] An accident handling device that identifies the cause of an abnormal accident and guides its treatment by comparing the plant state quantities from the nuclear power plant with the knowledge stored in the operating knowledge base circuit, and creates past and possible new transient responses using the plant dynamic characteristic calculation circuit. Then, between the skill development equipment, which trains inexperienced operators and experienced operators by having them perform countermeasure operations, the skilled operators are trained to respond to the new transient response created by the plant dynamic characteristic calculation circuit. A skill development device characterized in that a circuit is provided for storing driving knowledge such as response operations in a driving knowledge base circuit of the accident response device, and the ability of the accident response device to identify causes of abnormal accidents and guide actions is expanded. A method for expanding the operating knowledge base of accident response equipment for nuclear power plants using