JPS61223775A - Plant operation training aid - 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 [Field of Industrial Application] The present invention relates to an auxiliary device for training the operation of a plant such as a nuclear power plant, and in particular, the present invention relates to an auxiliary device for training the operation of a plant such as a nuclear power plant. The present invention relates to a plant operation training auxiliary device that performs an auxiliary function when evaluating personnel. □ "Conventional technology" It is generally difficult to learn the operating techniques for highly developed and complex plants such as nuclear power plants.

Therefore, for such plants, a plant simulator is prepared, and a dedicated instructor provides operational training to the operators.

In such cases, the operator's driving operations should be carried out by the instructor.
The results are evaluated each time and used as training materials.

By the way, during driving operation training, erroneous operations, or even operations that deviate from the planned standard operations, may occur. Conventionally, when an instructor observes an operator's actual skills and discovers such operations, he or she records his or her observations in shorthand. Based on this, the operation was evaluated and an estimate was made as to why the operation deviated from the standard operation.

In conjunction with observation records by instructors, the actions of the operators were sometimes recorded on video tape recorders, and the reports and conversations of the operators were sometimes recorded on tape recorders. These served as an auxiliary device to reproduce the training situation as accurately as possible.

Furthermore, in recent years, auxiliary equipment has been introduced that uses computers to record various data such as the contents of keys operated by trainees as operators and the displayed values of recorders and meters as a result of these operations. Development efforts have also been made, and it has become possible to evaluate and estimate the reasons for operation using these recorded data.

``Problems to be solved by the invention'' By the way, the instructors are people with sufficient knowledge, and their work is highly evaluated.

However, the instructor's evaluation or estimation of the reason for the operation is ultimately based on subjective judgment, and due to human uncertainty, it is difficult to say that a constant evaluation can always be derived. Furthermore, even if an evaluation checklist is used to eliminate instructor subjectivity as much as possible, when operations are diverse and complex, it is difficult to identify all operation items and create a checklist. It is also difficult to perform perfect observations based on the complicated checklists that have been created.

This means that in addition to the large number of operational items to be evaluated, instructors must evaluate the operator's series of operations by (i) their smoothness, (ii) their temporal priority, and (iii)
It is necessary to evaluate from different viewpoints such as operational safety and (iv) attitude during operation, and when evaluating these, we also take into account the operator's operational experience and proficiency in specialized knowledge about plant processes. This is because it must be taken into consideration.

Furthermore, when evaluating driving operations, it is not enough for instructors to simply analyze the behavior of the operator. In other words, when an operation or sequence of operations that deviates from standard operating procedures is performed, it is not enough to simply judge them as good or bad, but also to examine the epistemological understanding of why the operator took that action. Inferences that go into the world are required.

It is almost impossible to remember these various evaluation items while observing operations unfolding moment by moment in front of you, and to retain the results in your brain's memory. Therefore, instructors have no choice but to rely on shorthand notes, but there are limits to the precision of this work. Additionally, while taking notes, there is a risk of overlooking important changes in the operator's behavior.

On the other hand, recording the behavior of operators using computers is a kind of modeling of humans, and is merely a way of observing humans from a passive standpoint. In other words, when we view humans as things that react to various stimuli and evaluate their operating skills, we can only evaluate them as good or bad based on the score out of 10.

By the way, as already explained, there may be a reason for a driving operation that deviates from the standard operation sequence, and it is necessary to conduct an evaluation that understands the underlying cognitive process of the operator or trainee.

In other words, there is a need for an evaluation system that provides various findings and reasons for evaluation as a result of flexibly applying the instructor's specialized knowledge.

In view of these circumstances, the present invention provides a recording means for online recording of data obtained from the simulator and operation data representing the operation status of a control panel in an operator training system that uses a simulator to train plant operation operations. and an evaluation auxiliary data creation means for creating evaluation auxiliary data for assisting the evaluation of driving operations from these recorded data using a predetermined database, and the plant operation training auxiliary equipment is equipped with an evaluation auxiliary data creation means that is used by instructors. make it possible to conduct evaluations based on Here, the predetermined database is, for example, driving operation knowledge and evaluation knowledge regarding safety and economic efficiency possessed by an instructor or a driving operation expert. It is desirable that this database can be corrected using a database correction means when a flaw is found in the conventional driving operation technique.

"Example" The present invention will be described in detail below with reference to Examples.

FIG. 1 shows the basic configuration of the plant operation training auxiliary device of this embodiment. Plant operation training auxiliary equipment is a plant operation training aid that records the plant status and operation status.
an operation recording unit 1; and an evaluation/estimation unit 3 that includes a predetermined database and uses recorded data 2 recorded in the plant/operation recording unit 1 to evaluate operator operations and estimate the reason for the operation.
, and a display/correction section 6 into which evaluation/estimation results 4 and reference data 5 recorded in the operation recording section 1 are input and displayed. The display/correction unit 6 is equipped with an output device for display and an input device for data correction. For example, by operating a keyboard, the display/correction unit 6 manually inputs correction data 7 to the evaluation/estimation unit 3 and causes the database to be corrected. You can also do that.

Figure 2 shows the plant/operation record section.

The plant/operation recording unit 1 includes a plant status recording unit 11 that records the simulated plant status moment by moment, and an operation recording unit 12 that records the operation status of the control panel and the like. Here, the operation recording unit 12 can record not only the operator's operations, but also the instructor's operations and instructions, or the operator's actions using images. Of these, plant state data 14 representing the state of the plant and operation data 15 representing the operating state of the control panel are input to a time-series data recording section 16, where they are combined. In this way, record data 2 is created in which each state of the plant and the operation status as a result of the corresponding action are expressed in chronological order. Behavioral data of the trainee using a video camera and conversation data between the instructor and the trainee using a microphone are recorded by the operation recording section 12 as necessary, and then outputted as reference data 5.

FIG. 3 shows an evaluation/estimation section 3 and a display/correction section 6 that use this recorded data 2.

The recorded data 2 is input to the evaluation/estimation execution device 18 in the evaluation/estimation section 3 . The evaluation/estimation execution device 18 uses the driving knowledge base 19 as a reference to evaluate the operator's operation and estimate the reason for the operation. Judgment data 21 as these results
is a storage device 22 equipped with a magnetic disk, magnetic tape, etc.
is temporarily saved. The individual judgment data stored in the storage device 22 can be retrieved again if necessary, and the evaluation/estimation execution device can evaluate the entire operation, and check whether or not the erroneous operation that was noted during the previous driving operation has been corrected. A check is made. These results will be stored in the storage device 22 again.

The evaluation/estimation results 4 outputted from the storage device 22 are manually input and displayed on the display device 24 in the display/correction section 6.

The display device 24 is composed of, for example, a CRT, a line printer, and a speaker for reproducing the first episode of the show, and can also visually or audibly display reference data such as a video signal.

The display/correction section 6 is also equipped with a correction data manual device 25, and correction data can be input using the keyboard or function keys. At this time, the instructor may request the reasons for the evaluation or estimation results as materials for making corrections. When a reason request is made as the correction data 7, the storage device 22 retrieves the driving knowledge corresponding to the corresponding reason from the driving knowledge base 19 and sends it to the display device 24. The instructor examines the displayed content and grasps corrections and additions in the priority order, logical content leading to predetermined reasons, etc. Then, the contents to be corrected are inputted as correction data 7, and the contents of the driving knowledge base 19 are changed. At this time, the correction data 7 is displayed on the display device 24, and the correction contents are confirmed.

The evaluation/estimation section, which plays a central role in the plant operation training aid device described above, will be explained in more detail.

Driving training using a simulator is generally performed according to a predetermined scenario. Therefore, operations to be performed in response to instructions or commands, in other words, operations to be performed when the plant reaches a predetermined state, can be stored in advance as an operating knowledge base. Here, the driving knowledge base refers to, for example, the priority order of these operations when several operations are required, the time allowed from the occurrence of a certain event until a predetermined operation is performed, or the timing of control operations. It is a limit value for the fluctuation of the state quantity of a plant in a plant, and is stored in the form of a kind of rule for operation.

The trainee's operations are evaluated against these driving knowledge bases, but the displayed results are not always consistent. This is because, in general, the results of plant operation and operation will vary depending on which of the different viewpoints, such as safety or economic efficiency, is prioritized. For example, in the case of a nuclear power plant, if safety is given extreme priority, the operation of the reactor will be shut down even in the event of a slight abnormality. On the other hand, if economic efficiency is given priority,
This will prevent the nuclear reactor from shutting down as much as possible. Therefore, depending on how much weight is given to each idea, various aspects will occur in the operation of the nuclear reactor. Which is the best for each state of the plant depends on the instructor's thinking, and does not necessarily agree.

Therefore, as a driving knowledge base, various operations are assumed and instructors and driving experts give evaluation values for each. In this way, for operations for which evaluation values have been assigned once, objective results that reflect the opinions of each expert are displayed. If there are different ways of thinking or positions among instructors, etc., the results of the operator's operations can be displayed in parallel in a plurality of ways according to each of these. The instructor can examine each of these display contents and give an objective evaluation or infer various reasons.

In addition, in this plant operation training auxiliary device, when an instructor or the like performs an operation that could not be expected in advance, the display device 24 displays the details of the operation, and the operation knowledge base is It is possible to request an evaluation of the range that can be analyzed and an estimate of the reason, and it can be used as supplementary material for the instructor's final evaluation.

Of course, the instructor can also add the evaluation result of this new operation performed by the trainee to the driving knowledge base 19 in association with the operation content. In this way, the driving knowledge base 19 is enriched with contents, and the evaluation/estimation performed by the evaluation/estimation execution device is made objective.

By the way, in the field where plant operation is performed, operation actions cannot be determined only with respect to each state of the plant represented by the processing results of the output computer of various sensors. In other words, when multiple operators work together to perform a driving operation, they may perform an operation that is related to an operation previously performed by another operator, or they may not be able to respond to predetermined instructions or information over the phone, etc. New operations may be required based on the In plant operation training, instructors play the role of providing such conditions. Therefore, this plant operation training auxiliary device records the instructor's control panel operations and the conversations between the instructor and the trainee, making it possible to evaluate and infer the reasons for the operation in a manner similar to that on site.

Next, as an example, the operation of the evaluation/estimation unit 3 will be explained regarding an operation in which the water level of the reactor is maintained by blowdown of the clean-up water system of the reactor.

FIG. 4 schematically shows the circuit configuration of this evaluation/estimation section 3. A CPU (central processing unit) 31 of the evaluation/estimation section 3 is connected to each section by a path line 32. Of these, the RAM 33 stores programs for evaluation and estimation operations stored in a part of the storage device 22, as well as
It is also used as a work area for various data processing.

The first boat 34 manually inputs plant status data 14 output from sensors in the plant, and
It is a boat for sending out to. The second boat 35 is
It is used for the operation data 15 of the control panel.

Now, the water level in the reactor will be controlled as shown in FIG. 5, for example. Here, water level L8 and La
is a case where the water level is high or low enough to cause an emergency shutdown (scram) of the reactor, and the operation is performed within a predetermined range between these levels L8 and La. Now, if the upper limit value (UL) and lower limit value (LL) for water level control are set as shown in the figure, deviation from the limit range has occurred in the operation example shown by the solid line 41, and it is shown by the dashed-dotted line 42. There is no deviation in the operating example. Feature extraction-rl of such water level fluctuations is performed using the following items.

■Number of deviations from the limit area: 01 ■Time for deviation from the limit area: tI ■Limit width: 02 ■Average water level 2 c3 Here, in the operation example shown by the solid line 41, the number of deviations from the limit area c
, is six times, and the deviation time t1 is expressed as an integral value of the deviation time at each deviation. The control width c2 is the difference between the maximum value and the minimum value of the controlled water level, and the average water level C3
is the temporal average value of each water level. These items are determined by the arithmetic processing of the CPU 31 based on the plant state data 14 representing the water level fluctuation state of the reactor.

In addition to this, the evaluation/estimation unit 3 also performs priority operation r'2, simultaneous operation r
3. Also consider the equipment used, r, and perform evaluation and estimation r5 based on this. Here, the priority operation r2 is a judgment as to whether or not there is an operation that has priority over the currently performed water level control operation.
ult). Also simultaneous operation r3
If there is an operation to be performed in parallel to this water level control operation, it is determined whether or not this operation has been performed. If it has not been performed, F is output, and otherwise, T is output as the result. As for the tool r4 used, if it is correct, T is
If it is wrong, F is output as the result.

Evaluation of the operation example shown by the solid line 41 in FIG.
The estimated r5 is, for example, as follows. However, the symbol A here means and.

c, :5△t I: l Qsec A La <
C2< LtA C3: LM△r2: TA r3
: TA r4 : TSuch evaluation/estimation r5
are stored in the storage device 22 in association with the trainee's identification code and training date and time.

The storage device r5 further contains the following items r6...
Store.

r6: Whether or not there is a violation of technical specifications and the details of the violation r7: Possibility of radioactive material release r8: Possibility of equipment damage r9: Contents of procedure violation Here, the contents of procedure violation are organized into the following details, for example.

r9,: Violation details for priority operation r92: Violation details for simultaneous operation r, 3: Violation details for safety r8. : Violation details regarding economic efficiency r95 = These contents stored in the estimated reason storage device 22 for the violation are displayed in the display correction unit 6
The data will be read out upon request and displayed on a CRT or output from a printer.

For example, the water level control operation represented by the dashed-dotted line 42 in FIG. For example, the results displayed on the display/correction section 6 may be rather unfavorable in terms of safety and the like. As already explained, the instructor can perform various studies with the aid of the displayed contents and make comprehensive evaluations objectively and in detail.

"Effects of the Invention" As explained above, according to the present invention, operator operations for each state of the plant are recorded in real time, and each operation is based on the knowledge possessed by instructors and operation experts. Since the evaluation and reasons are estimated based on the results, not only is the burden on the instructor reduced, but the database can also be used to provide uniform, objective instruction among instructors. Furthermore, by enriching the database, it becomes possible to use it as an auxiliary aid in actual plant operation.

[Brief explanation of the drawing]

The drawings are for explaining one embodiment of the present invention, and among them, Fig. 1 is a block diagram showing the schematic configuration of the plant operation training auxiliary device, Fig. 2 is a block diagram of the plant/operation recording section, and Fig. 3 is a block diagram showing the schematic configuration of the plant operation training auxiliary device. The figure is a block diagram showing the contents of the evaluation/estimation section and the display correction section, Figure 4 is a block diagram showing the main parts of the circuit configuration of the evaluation/estimation section, and Figure 5 is a control characteristic diagram showing an example of water level control. be. 1...Plant/operation record department, 3...
Evaluation/estimation section, 6...Display/correction section, 19...Driving knowledge base, 25...Correction data manual device.

Claims (1)

[Scope of Claims] 1. In an operator training system that uses a simulator to train plant operation, plant status data representing the plant status obtained each time from the simulator and operation data representing the operating status of a control panel. A plant characterized by comprising: a recording means for recording on-line; and an auxiliary evaluation data creation means for creating auxiliary evaluation data for assisting evaluation of driving operations from the recorded data using a predetermined database. Driving training aid. 2. Claim 1, characterized in that the predetermined database is driving operation knowledge and evaluation knowledge regarding safety and economic efficiency possessed by an instructor for instructing driving operations and a driving operation expert. The plant operation training aid device described in Section 1. 3. The plant operation training auxiliary device according to claim 1, further comprising database correction means for correcting the database.