JPH09218285A - Apparatus for monitoring nuclear power plant and method for setting driving data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically confirm whether a control rod sequence conforms to manipulation rules of a control rod when the sequence is to be set. SOLUTION: A control rod driving control device 4 outputs a control rod manipulation signal in accordance with a control rod sequence to a control rod driving device 3, thereby pulling out or inserting a control rod 2. A sequence information 4a set from a sequence input device 6 is read out to a sequence manipulation rule-judging device 7. A state of the control rod immediately before each content of the manipulation is executed in accordance with the sequence is estimated. It is then judged whether a combination of the estimated state and the manipulation content conforms to a control rod manipulation rule.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear power plant, and more particularly to a control rod sequence setting method based on control rod operating rules.

[0002]

2. Description of the Related Art Reactor control rods are inserted or removed one by one or in groups by operating signals generated according to the operating procedure of a control rod sequence. The control rod sequence considers the characteristics of the reactor and, in order to ensure that undesired operating patterns that could put the reactor in an unsafe state are avoided, operators make decisions based on the control rod operating rules. It is set considering the logic. Further, during the operation of the nuclear reactor, the operating position state of the control rod is monitored, and if an operation request having an unfavorable pattern is generated, the operation request is stopped at the operator's discretion.

[0003]

If an incorrect control rod sequence that does not comply with the control rod operating rules is set, the output of the control rod operating signal by the control rod sequence is stopped during operation in order to ensure safety. , Will interfere with normal operation of the nuclear plant. However, in the conventional setting of the control rod sequence, the error of the sequence is immediately judged,
It was not considered so that the cause could be elucidated.

The above-mentioned control rod operating rule has a plurality of logics, and each logic is subdivided according to the control rod. Normally, there are about 200 control rods in a nuclear reactor, so the total number of logics is considerable. In addition, there are dozens to hundreds of procedures in the operation sequence, and it is a considerable experience for the operator to judge the suitability of the control rod operation rule for all the sequence procedures when setting the operation sequence. And needed effort.

An object of the present invention is to overcome the problems of the prior art, to determine the suitability of the operation sequence to be set, and further to specify the cause of the error, and a control rod sequence setting method, and such setting means. It is to provide a control device for a nuclear reactor.

[0006]

In order to achieve the above-mentioned object, the method of the present invention, when setting a control rod sequence which defines an operating procedure for pulling out or inserting a control rod,
Assuming that the operation content of each step of the set control rod sequence is executed, the position state of the control rod immediately before the execution is estimated, and whether the combination of the estimated position state and the operation content complies with a predetermined control rod operation rule. It is characterized in that whether or not the operation content has been determined is determined, and if not determined, an error in the operation content is notified.

When the control rods are operated for each group, the position state of the control rod group is obtained based on the position state estimated for each control rod in the group. In that case, when all the control rods of a certain group group are completely withdrawn, the decision logic that enables the withdrawal of control rods belonging to another group group and / or when all the control rods of another group group are fully inserted It is characterized in that the judgment is performed by a judgment logic which enables the pulling out or the insertion of the control rods belonging to the group group.

If the control rod operation rule is not followed, the control rod or control rod group that caused the error and the identification number of the determination logic of failure are obtained.

A reactor operating apparatus to which the method of the present invention is applied is configured to output a control rod drive device for pulling out or inserting a control rod in accordance with an operation signal, and a control rod sequence set in a sequence information storage means. It is assumed that the control rod drive control device for outputting, the input device for setting the control rod sequence in the sequence information storage means for each procedure, the operation content of each procedure of the control rod sequence are read, and the operation content is executed. The control rod state estimating means for estimating the position state of the control rods or the position states of the control rods and the control rod group immediately before that, and whether the combination of the estimated position state and the operation content complies with a predetermined control rod operation rule. A sequence operation rule determination device having determination logic means for determination is provided.

As a result, the set control rod sequence is sequentially read to check whether it meets the control rod operating rules, and an error is automatically detected.

A reactor control device of another form to which the method of the present invention is applied detects the position state of an operating control rod or control rod group in real time, and detects the detected position state and control rod operation signal. A control rod that monitors whether or not the combination with the operation content of the control rod sequence immediately before output complies with the control rod operation rules described by a plurality of judgment logics, and if so, permits the output of the operation signal. In a nuclear reactor control device including an operation rule monitoring device, an input device for setting the control rod sequence in the sequence information storage means for each procedure, and an operation for the operation content of each procedure of the set control rod sequence. Assuming that the contents are executed, the control rod state estimating means for estimating the position state of the control rod or the control rod group immediately before the execution, and the estimated position state The combination of the operation contents and providing a, a simulator with a determination logic means whether conform to the decision logic.

This allows not only monitoring the control rod sequence during operation, but also checking the control rod operation rule of the set sequence while simulating the operating state with a simulator when it is necessary to set or change the sequence. .

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of a nuclear reactor operation monitoring system according to an embodiment. A large number of control rods 2 provided in the nuclear reactor 1 are pulled out or inserted into the reactor core by a control rod driving device 3. Control rod drive controller 4
Outputs a control rod operation signal to the control rod drive device 3. The control rod operation signal is generated based on the operation sequence of the sequence information storage means 4a according to the operation instruction of the operator. The sequence information is set from the input device 6.

The control rod operating rule monitoring device 5 takes in the current control rod position state and the control rod operating signal immediately before execution, and in the current control rod position state, the control rod operating signal immediately before execution conforms to the control rod operating rule. Determine whether you are doing. If the operation signal immediately before execution does not comply with the operation rule, a stop signal is output to the control rod drive control device 4 and output of the operation signal to the drive control device 3 is stopped.

The sequence operation rule determination device 7 is a control rod state calculator 7a for estimating the position state of the control rod immediately before execution from the control rod sequence, and whether the set control rod sequence complies with the logic of the control rod operation rule. The sequence operation rule determination unit 7b determines whether the sequence is not satisfied, and the sequence failure determination unit 7c is configured to determine the cause of the failure of the sequence. These determination results are output to the display device 8.

FIG. 2 shows an example of the structure of the control rod sequence. The sequence information includes information such as a control rod operating procedure, a control rod to be operated, and a control rod position when operated.
The illustrated example shows the procedure for pulling out all the control rods from the fully inserted state. 0 step when the control rod is completely inserted, 100 when the control rod is completely pulled out
The position of the control rod is shown from 0 to 100 steps. The insertion procedure is the reverse of the extraction procedure.

FIG. 3 shows an example of the control rod operation rule which is the processing standard of the control rod operation rule monitoring device. In the example shown,
The control rods are divided into six groups, and whether or not the control rods can be operated is determined according to the state of each control rod group. The control rod operation rule monitoring device 5 has a logic circuit that realizes this control rod operation rule, inputs the current control rod state, and outputs the control rod state of each group and the control rod drive control device 4. Capture the operation signal and check if it complies with the control rod operation rules.

FIG. 4 is a functional block diagram for explaining the processing operation of the sequence operation rule determination device which is a characteristic part of the present invention. The control rod state calculation unit 7a fetches sequence information from the sequence information storage means 4a of the control rod drive control device 4, and estimates the control rod position state immediately before the operation for the control rod sequence of each procedure shown in FIG. Then, it is stored in the control rod status information file 7d.

FIG. 5 shows a processing flow of the control rod state calculation section. Normally, the procedure of n = 1 is started. First, the n-th sequence is fetched (S1), and the control rod position immediately before performing the procedure is calculated (S2). Based on the calculation result, the control rod state of each control rod group is calculated (S
3), until all control rod groups are completed (S4). Next, in the above example, the control rod states in group units are calculated for the first group of groups 1 to 3 and the second group of groups 4 to 6 (S5). The above steps S1 to S5 are repeated until this is completed for all the procedures.

In the processing of S3, the control rod state calculation means, for example, determining whether or not all the control rods in the control rod group or all the control rods in the group are in the state of "all extraction" or "all insertion". Is. In this way, the control rod state immediately before execution corresponding to each sequence is estimated, and it is determined whether or not the combination of the estimated control rod state and the operation content of the sequence conforms to the operation rule.

FIG. 6 is a comparison table of control rod states and control rod operation signals. Here, the circle mark of “total withdrawal” in group 1 indicates that all the control rods in the group are completely withdrawn, and neither withdrawal request nor insertion request is generated in this group. The circle mark of "all insertions" in group 3 indicates that all the control rods in the group are completely inserted, and neither pull-out request nor insert request is generated in this group. The circle mark of "withdrawal request" of group 2 indicates that withdrawal operation signals are generated for all the control rods in the group.
By the way, the control rods in this group are all marked with an X,
It's neither "fully pulled out" nor "fully inserted".

Further, "total withdrawal" is performed for each group of the first group of control rod groups 1 to 3 and the second group of control rod groups 4 to 6.
Checking the control rod status of "all insertion" and the presence or absence of operation signals of "drawing request" and "insertion request". By the way, the first
In the group, the control rod state is neither "fully pulled out" nor "fully inserted",
It has been confirmed that a "drawing request" has occurred. Based on this confirmation result, the control rod operation signal is checked for an error, and if there is an error, a notification is given as described later.

FIG. 7 shows an example of a decision logic circuit included in the sequence rule decision section. The logic circuit realizes the logic of the logical number of the control rod rule, and the illustrated example shows a configuration for realizing the control rod withdrawal stop determination logic of the logical numbers 1 and 2 shown in FIG.

In this judgment logic circuit, the cases where the signal of "control rod withdrawal stop" is output are A and B. In the case A, the "drawing request" is output in the groups 4 to 6 of the second group while the control rod groups 1 to 3 of the first group are not "total withdrawal". In the case B, the control rod groups 4 to 6 of the second group are not “fully inserted”, and the group 1 of the first group is
The "pull-out request" is output in ~ 3. The control rod insertion stop determination logic of logic number 2 is also configured in the same manner, and if the input control rod state of each group and the insertion request do not conform to logic 2, a "control rod insertion stop" signal is output.

The sequence rule determination unit 7b, for example, for each procedure shown in FIG.
By inputting the "insertion request" and the control rod state of each group group in the procedure stored in the control rod state information file 7d, it is determined whether or not there is an output of "withdrawal stop" or "insertion stop" of the control rod. . If the stop signal is not generated, the procedure is regarded as a correct control rod sequence based on the control rod operation rule.

On the other hand, when the "drawing stop" or the "insertion stop" occurs, the sequence failure cause determining unit 7c is requested to determine the cause of the erroneous control rod sequence. The sequence failure cause determination unit 7c identifies the control rod group causing the failure for each logical number shown in FIG. 3 based on the corresponding information in the control rod status information file 7d.

FIG. 8 shows an example of a pull-out stop cause determination logic circuit. Control rod group 1 for logical number 1
If the control rod status of Nos. 3 to 3 is not "total withdrawal", check the "withdrawal request" of each of the control rod groups 4 to 6 and, for example, if "withdrawal request" is issued to group 5, then "logic to group 5" is issued. No. 1 is not established ". For the logical number 2, if the control rod states of the control rod groups 4 to 6 are not "full insertion", check the "pull-out request" of each of the control rod groups 1 to 3 and, for example, to the group 1 " If the “drawing request” is issued, it is determined that “logical number 2 is not established in group 1”.

A logic circuit for determining the cause of the insertion stop is similarly constructed. In the example of FIG. 3, the insertion stop occurs due to the failure of the logical number 2. If the control rod states of the control rod groups 4 to 6 are not "full insertion", the control rod groups 1 to 1
3 Check each "insertion request", for example group 1
If the "insertion request" is issued to "," it is determined that "logical number 2 is not established in group 1."

FIG. 9 is an example of a display of the determination result of the failure cause. The sequence failure cause determination unit 7b displays the determined failure reason on the display device 8. In this example, the content of the corresponding sequence including the procedure number, control rod loop, current position, etc., the non-establishment signal (drawing stop / insertion stop), the control rod group, the non-establishment content including the logical number, and the conflicted logical number. The logical content of is shown.

According to this embodiment, it is possible to automatically confirm whether or not the sequence complies with the control rod operation rule during the work of setting the control rod sequence of the nuclear reactor, so that the burden on the operator of the sequence setting work can be reduced. . further,
Since the cause of non-compliance with the control rod operation rules is specified and displayed, the sequence information can be easily changed.

According to the reactor operation system equipped with the sequence operation rule determination device of the present embodiment, it is possible to check the suitability of the control rod sequence for the control rod operation rule at any time when the sequence is set or changed. It is possible to avoid unnecessary control rod operation stop due to incorrect setting of the sequence.

In the above embodiment, the suitability of the setting sequence for the control rod rule is checked based on the position state of the control rod group. The control rod operation rule includes, for example, a rule that checks the position state of control rods in the same group. It goes without saying that such various control rod operating rules can be applied to the practice of the present invention.

[0034]

According to the present invention, since the validity of the sequence for the control rod operation rule can be automatically confirmed at the time of setting the control rod sequence or before operating the control rod sequence, the burden of the operator on the sequence setting can be reduced. There is an effect that it can be reduced and unnecessary stop of control rod operation due to setting error of sequence can be avoided.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a reactor operation system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of the configuration of control rod sequence information.

FIG. 3 is an explanatory diagram showing an example of a determination logic describing a control rod operation rule.

FIG. 4 is a functional block diagram of a sequence operation rule determination device.

FIG. 5 is a processing flow chart of a control rod state calculation unit.

FIG. 6 is a control table showing control rod states and operation requests for each control rod group.

FIG. 7 is a logic circuit diagram of a withdrawal stop determination logic of a sequence rule determination unit.

FIG. 8 is a determination logic circuit diagram of a pull-out stop cause in a sequence failure cause determination unit.

FIG. 9 is a display screen diagram showing an example of a determination result of a sequence failure cause determination unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Reactor, 2 ... Control rod, 3 ... Control rod drive device, 4 ... Control rod drive control device, 4a ... Sequence information storage means, 5
... control rod operation rule monitoring device, 6 ... input device, 7 ... sequence operation rule determination device, 7a ... control rod state calculation unit, 7b
... sequence operation rule determination unit, 7c ... sequence failure cause determination unit, 7d ... control rod state information file, 8 ... display device.

Claims (9)

[Claims] 1. An operation data setting method for a nuclear power plant that defines an operation procedure for pulling out or inserting a control rod, assuming that the operation data (operation content) of the control rod sequence of each set procedure is executed. , The position state of the control rod immediately before its execution is estimated, and it is determined whether or not the combination of the estimated position state and the operation content complies with a predetermined control rod operation rule. If not, the operation data (operation content) A method for setting operation data of a control rod sequence, characterized by notifying an error. 2. The control rod group according to claim 1, wherein when the control rods are operated for each group, the position state of the control rod group is obtained based on the position state estimated for each control rod in the group. Control rod sequence operation data setting method. 3. The judgment logic according to claim 2, wherein when all the control rods of a certain group group are completely withdrawn, a decision logic and / or all controls of another group group that enables the withdrawal of control rods belonging to the other group group. A method for setting operation data of a control rod sequence, characterized in that the determination is performed by a determination logic that enables pulling out or insertion of a control rod belonging to a certain group when the rod is completely inserted. 4. The control rod or control rod group according to claim 1, 2 or 3, wherein the control rod or control rod group causing the error and the identification number of the determination logic of failure are obtained when the control rod operating rule is not followed. Control rod sequence operation data setting method. 5. A nuclear power plant comprising a control rod drive device for pulling out or inserting a control rod according to an operation signal, and a control rod drive control device for outputting the operation signal according to a control rod sequence set in a sequence information storage means. In a monitoring device, an input device for setting the control rod sequence in the sequence information storage means for each procedure, and operation contents of each procedure of the control rod sequence are read out, and it is assumed that the operation contents are executed, and the control rod immediately before that is read. Control rod state estimating means for estimating the position state of the control rod or the control rod and the position state of the control rod group, and a judgment logic means for determining whether or not the combination of the estimated position state and the operation content complies with a predetermined control rod operation rule. An apparatus for monitoring a nuclear power plant, which is provided with a sequence operation rule determination device having the above. 6. The sequence operation rule determination device according to claim 5, wherein when the determination result by the determination logic means is negative, the control rod or control rod group that causes an error and the determination logic of failure are identified. A nuclear power plant monitoring apparatus having a cause determination logic means. 7. The monitoring apparatus for a nuclear power plant according to claim 5, further comprising a display device for displaying a part of the operation content when the determination result by the sequence operation rule determination device is negative. 8. A control rod drive device for pulling out or inserting a control rod according to an operation signal, a control rod drive control device for outputting the operation signal according to a set control rod sequence, and detection in real time during operation. Immediately before outputting the operation signal, it is determined whether the operation content of the underlying control rod sequence complies with the control rod operation rule for the position state of the control rod, and if so, the control that permits the output of the operation signal is performed. In a nuclear power plant monitoring device including a rod operation rule monitoring device, an input device for setting the control rod sequence in the sequence information storage means for each procedure, and the operation content of each procedure of the set control rod sequence Control that estimates the position state of control rods or the position state of control rods and control rod groups immediately before the execution assuming the execution of contents State estimation means and the monitoring device of a nuclear plant, wherein the combination of the estimated position state and the operation content provided, and simulator having a determination logic means whether you are following a predetermined control rod operation rules. 9. The nuclear power plant monitoring device according to claim 8, wherein the simulator is activated when the control rod sequence is set or changed.