JP2003177195A - Operation monitoring device for control rod - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a monitoring device to unilaterally change a mode SW position in accordance with a test process of this device for control rods. <P>SOLUTION: A control rod operation controller 8B has a control rod selection part 8a for calculating a corresponding control rod address from a control rod selection SW information operated from a control panel, a drive command output part 8c for generating a drive command signal from the calculated control rod address, an insert/pull-out interlock part 8b for generating an insert or a pull-out command signal by an input of an insert or pull-out SW signal or an operation permission signal, and a switch means 23 for outputting a nuclear reactor mode signal to the insert/pull-out interlock part 8b and for switching the nuclear reactor mode signal to a pseudo nuclear reactor mode signal and outputting the pseudo nuclear reactor mode signal to the insert/ pull-out interlock part 8b only when the nuclear reactor mode signal is fuel replacement mode and the permission signal is ON. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a function of controlling the position of a control rod in a nuclear reactor to adjust the reactor power, a function of detecting and displaying the position of the control rod, and a function of maintaining each function. The present invention relates to a control rod operation monitoring device having the same.

[0002]

2. Description of the Related Art A large number (about 200) of control rods are arranged in a nuclear reactor, and these control rods are inserted or withdrawn to raise or lower the reactor output. In addition, the core state is constantly monitored by the position of each control rod, and operation is performed while confirming the soundness in the reactor.

A conventional control rod operation and monitoring device for operating this type of control rod and monitoring the control rod position is a BWR (boiling water type).
An example of a nuclear power plant will be described with reference to FIGS. 9 to 11.

In FIG. 9, a plurality of control rods 2 are arranged in a nuclear reactor 1, and CRDs corresponding to the respective control rods 2 are provided.
(Control Rod Drive) The hydraulic drive mechanism 3 is installed on the pipe. CRD water pressure drive mechanism 3
Controls the reactivity in the reactor by operating the control rod 2 in the insertion direction or the withdrawal direction by appropriately opening and closing the four directional control valves 4a to 4d per control rod. The directional control valves 4a to 4d are the control rod operation monitoring device 100.
It is controlled by a command signal from the on-site driving unit 9.

The control rod operation monitoring device 100 is roughly divided into a control rod operation controller 8, a site drive unit 9, a site position detection unit 11, and a position monitoring controller 12.

Here, the control rod operation controller 8 is connected to the reactor control panel 5 and also to the monitoring device 14, and the field drive unit 9 drives each directional control valve for driving each CRD hydraulic drive mechanism 3. It is connected to 4a-4d. Further, the site position detection unit 11 is connected to the position detector 10, and the position monitoring controller 12 is connected to the reactor control panel 5.

More specifically, when the operator operates the control rod selection switch 6 and the insertion / extraction switch 7 on the reactor control panel 5, the control rod selection switch 6 selects the control rod selection switch 6 from the control rod selection switch 6.
The signal o is input to the normal control rod selection unit 8a to calculate the selection control rod address a11. Further, while the control rod insertion / extraction SW signal p is input to the insertion / extraction interlock portion 8b, the extraction permission signal 1 from the monitoring device 14 for monitoring the reactivity in the reactor 1 and the reactor control panel 5 Reactor mode signal M (m
1, m2, m3) are input to the insertion / extraction interlock unit 8b, and the insertion command signal a2 or the extraction command signal a
3 is generated.

The reactor mode signal M depends on the mode SW position, m1 = 1 in the refueling mode, and m2 = in the start mode.
1, the signal is m3 = 1 in the operation mode. Also,
The control rod address signal a1 and the insertion command signal a2 or the withdrawal command signal a3 are output from the drive command output unit 8c to the field drive unit 9 as drive command signals A (a1, a2, a3).

Here, the drive command signal A is changed to (a11, 1,
0), the selection control rod address a in the field drive unit 9
The insertion command signal a2 from the board 9ai corresponding to 11 is 1,
That is, in order to control the control rod 2 in the insertion direction, the four directional control valves 4b and 4c among the four valves are excited to perform an opening operation, and C
The RD water pressure drive mechanism 3 is driven in the upward direction, that is, in the side where the control rod 2 is inserted.

On the other hand, depending on the position of the CRD hydraulic drive mechanism 3, one of the contacts S00, S01 ... Installed at regular intervals in the position detector 10 operates as shown in FIG. A contact signal B is output so that the position of the control rod 2 can be detected.

That is, as shown in FIG. 11, contact signals B (H1, H2, H) from a plurality of contacts in the position detector 10 are provided.
4, H8, H16, V1, V2, V4, V8, V16,
V32) is a horizontal axis (H axis) 5 bits, vertical axis (V axis)
6-bit 11-bit matrix 11
When input with the core cable and one contact operates, 1
Within the 1-core cable, 1 bit for each of the H and V axes is ON
Then, the position is displayed by each control device on the position monitoring side of the control rod operation monitoring device 100. That is, each position detector 1
A contact signal B from 0 is input to each position detection board 11ai corresponding to each control rod 2 in the site position detection unit 11, and is transmitted via the transmission unit 11b to the position monitoring controller 12 of the central operation.
Of the control rod position information n that can be judged by an operator or a process computer by the signal conversion unit 12b, and is transmitted to another device such as a display device on the reactor control panel 5 and a process computer. Is output.

[0012]

By the way, the conventional control rod operation monitoring device 100 described with reference to FIGS. 9 to 11 has the following problems to be solved in terms of maintainability.

First, when the equipment inspection of the CRD hydraulic drive mechanism 3 and the directional control valves 4a to 4d is carried out, the insertion / extraction operation of the control rod 2 called the CRD air vent operation is carried out a plurality of times for each control rod 2. There is a need to. This temporarily reduces the water pressure in the hydraulically driven water pipe for inspection work, so that air may remain in the hydraulically driven water pipe. If air remains in the hydraulic drive water pipe, the air will be compressed and the propagation speed of the hydraulic pressure will slow down, and the time to drive the control rod will be stable. Air needs to be exhausted. in this case,
The conventional device has an interlock that allows only one control rod to be operated, and a CRD corresponding to about 200 control rods.
The air vent operation of the water pressure drive mechanism 3 was sequentially performed one by one. However, the time required for full stroke insertion and withdrawal of the control rod is about 2 minutes, and it is necessary to perform the operation several times until the air is completely discharged.
It was over 0 hours. During this time, the operator has a heavy burden of continuously operating the insertion / extraction SW 7, and
It was an obstacle to shortening the regular inspection period.

Second, the insertion / withdrawal interlock portion 8b.
Is designed to be interlocked in accordance with the reactor mode signal M, so it is necessary to switch the reactor mode SW13 to another position in order to confirm the soundness of the interlock during regular inspection. . However, the reactor mode S
Since W13 has a large number of contacts for each mode and is connected to a plurality of control devices, it is not possible to change the mode SW position unilaterally in accordance with the test process of this device. It is necessary to coordinate with the test process of the control device.
In the test process of other control devices, a waiting time occurs when the mode SW position cannot be changed immediately. In order to realize the recent demand for shortening the inspection period, it is necessary to eliminate such waiting time.

Thirdly, in the case of confirming the soundness of the position detection board 11ai of the control rod operation monitoring device 100 during the inspection period, conventionally a portable simulated control rod position generating section is prepared,
The input cable from the position detector to the position input board is removed, the cable from the simulated position generator is sequentially connected and the position signal is input to the position input board, and the simulated position and the output from the position monitoring controller 12 are collated. It confirmed the soundness. It takes about 10 minutes for each control rod to connect the input cables in sequence, and about 200 control rods require more than 30 hours, which is an obstacle to shortening the regular inspection time. It was

Fourthly, the control rod operation monitoring device 100 needs to specify the cause of failure and the location of failure in order to recover early when a failure occurs, but a specialist engineer is always on standby. Since it does not mean that it takes a certain amount of time from the occurrence of a failure to the estimation of the cause of the failure, the situation may change during this period, or the operator's memory may fade and the operating situation may not be accurately grasped.

Fifth, during regular inspection, the control rod operation monitoring device 10
When confirming the soundness of the equipment within 0, the measured data is arranged and collated with the judgment value and the previous data, but since the control rod operation monitoring device 100 has many boards and power supply devices. , It takes a considerable amount of time to organize and collate data. In addition, it is important to estimate the deterioration status of equipment from past measurement data and provide equipment replacement information to prevent the occurrence of failures. Since there were no measurement data or management tools for organizing and evaluating data, the amount of measurement data was large because it was inspected uniformly at every regular inspection, and it also took time to organize and evaluate data.

Sixth, in the case of a nuclear power plant, the base load operation is often performed, and in many cases, it is continuously operated for one year after the inspection. For electrical items such as electrolytic capacitors and batteries that require regular replacement because their characteristics deteriorate when used for a certain period of time, systematic replacement is performed for each device based on the delivery time and replacement cycle. . However, during the regular inspection before the replacement schedule, it was found that the output voltage ripple value increased due to the deterioration of the electrolytic capacitor in one of the power supplies of the equipment, and it was immediately determined that replacement was necessary. However, there is a possibility that parts will not be delivered in time during the regular inspection period and must be replaced at the next regular inspection. In addition, although these regular replacement parts are managed by the regular replacement parts list, there are a large number of equipment and devices in the entire plant and they are planned according to the priority order from the regular inspection period and the importance of each equipment. It may not be possible to replace the equipment at an appropriate time.

As described above, in recent years, there is an increasing need to shorten the operation suspension period for inspection in order to improve the operating rate of nuclear power plant equipment and reduce the total running cost of the plant. At present, this suspension period is at least about 2 months. In particular, the conventional control rod operation monitoring device has a large number of substrates and the like in the on-site drive unit and the on-site position detection unit corresponding to the number of control rods. In order to improve economy, it is necessary to shorten the inspection time for this device. In addition, in order to achieve stable maintenance of plant output, when a failure occurs in this device, it is necessary to take necessary measures such as quickly identifying the failure location from a large number of components and replacing it with a spare part. In addition to the above, it is necessary to appropriately manage the device characteristic data collected during the regular inspection so that the device failure due to the characteristic deterioration can be prevented. There is a problem that it is not possible to adequately respond to requests.

Therefore, according to the present invention, while maintaining reliability,
It is an object of the present invention to provide a control rod operation monitoring device that can shorten the inspection period at the time of regular inspection and the recovery time when a failure occurs, which is a recent demand.

[0021]

According to a first aspect of the present invention, a control rod address for specifying a control rod to be operated is calculated from control rod selection SW information operated from a control panel, and a control rod to be operated is controlled. A control rod operation controller that outputs a drive command signal for driving the control rod of the operation target from the insertion or withdrawal signal and the reactor mode signal indicating the state of the reactor, and the control valve is driven by the drive command signal to control the water pressure. Position detection board that is provided corresponding to each control rod that inputs the contact signal that specifies the position from each position detector of each control rod, and the field drive unit that operates the hydraulic drive mechanism that inserts or pulls out the control rod to be operated And a position detection unit having a transmission unit that converts each contact signal into each position signal and transmits the position signal by this position detection board, and each control rod position information by receiving each position signal In a control rod operation monitoring device including a position monitoring controller that converts and outputs the control rod to the control panel, the control rod operation controller calculates the control rod address corresponding to the control rod selection SW information operated from the control panel. A rod selection unit, a drive command output unit that generates a drive command signal from the calculated control rod address, and an insertion / removal interlock unit that generates an insertion or extraction command signal by inputting an insertion or extraction SW signal and an operation permission signal. And the reactor mode signal is output to the insertion / extraction interlock section, and the reactor mode signal is switched to the simulated reactor mode signal only when the reactor mode signal is in the fuel exchange mode and the permission signal is ON. And a switching means for switching to output to the insertion / extraction interlock unit. According to this means, the reactor mode signal is output to the insertion / extraction interlock section, while the reactor mode signal is in the fuel exchange mode, and
Only when the permission signal is ON, the reactor mode signal is switched to the simulated reactor mode signal and output to the insertion / extraction interlock section, so the position of the reactor mode changes depending on the test status of other control devices. There is no waiting time until you can do it. Further, it is possible to eliminate the possibility that the simulated reactor mode signal is erroneously selected during plant operation.

According to the second aspect of the present invention, the control rod address for specifying the control rod to be operated is calculated from the control rod selection SW information operated from the control panel, and the insertion or withdrawal signal and the atom of the control rod to be operated are calculated. A control rod operation controller that outputs a drive command signal for driving the control rod that is the operation target from the reactor mode signal that represents the state of the reactor, and a control valve that is driven by the drive command signal and operates the control rod that is the operation target by water pressure. By the field drive that operates the hydraulic drive mechanism that inserts or pulls out, and the position detection board that is provided corresponding to each control rod that inputs the contact signal that specifies the position from each position detector of each control rod, and this position detection substrate On-site position detection unit having a transmission unit that converts each contact signal into each position signal and transmits it, and a control panel that receives each position signal and converts it into each control rod position information In a control rod operation monitoring device having a position monitoring controller for outputting, a control rod simulated position signal composed of contact signals for confirming the soundness of the position detection board corresponding to each control rod of the site position detection unit Simulates the control rod position generator that outputs and outputs the contact signal of the actual control rod that identifies the position of each control rod by the contact point and outputs it to each position detection board of the site position detection unit, while simulating the control rod during simulation A switching unit for switching to the position signal and outputting to the corresponding position detection board of the site position detection unit is provided. According to this means, it is possible to switch to the control rod simulated position signal at the time of simulation and output it to the corresponding position detection board of the site position detection unit, so even when the plant is in operation, the connection of the connector to the position detection board is changed. It is possible to check the soundness of the substrate without performing the above and to reduce the time required.

According to a third aspect of the present invention, in the control rod operation monitoring device according to the second aspect, the simulated control rod position generation section provides the control rod simulated position signal with the address information of each control rod and the corresponding simulated position contact signal. And a means for sequentially generating a synchronization signal including address information at a predetermined timing, while the switching unit inputs the same address information as the switching means and the self corresponding to each position detection board. Each switching means has an address recognizing part and switches its own switching means to the simulation side. When a synchronizing signal is input, the corresponding switching means is sequentially switched to the control rod simulation signal to the corresponding position detection board. A means for sequentially outputting is provided. According to this means, each switching means has an address recognizing section, and switches so that the control rod simulation signal is input to the corresponding position detection board when the synchronizing signal including the address is input and the address is the self address. Switching is performed sequentially without manual intervention, and the time required to confirm the soundness of the substrate can be further shortened.

The invention of claim 4 relates to claim 1 to claim 3.
In any of the control rod operation monitoring devices described, based on the investigation item database that describes the investigation items corresponding to the event information when a failure occurs, and the failure information and operation information related to the control rod operation controller and the position monitoring controller. Then, the generated event specification information is created, the relevant investigation item list is extracted by referring to the investigation item database, and the failure factor estimation unit that estimates the failure factor from the extracted investigation item list and outputs it to the outside. The maintenance controller is provided. According to this means, when a device failure occurs, the investigation item corresponding to the occurrence event is displayed, so that the necessary investigation can be carried out immediately, so that it is possible to shorten the time until the failure cause is identified and the recovery is restored.

[0025] The invention of claim 5 relates to claim 1 to claim 3.
In any of the control rod operation monitoring device described, the measurement data storage area that stores the measurement data for the inspection that measured the characteristics of each circuit for each inspection, and the judgment value that stores the judgment value data for judging the quality of the measurement data A database, an inspection cycle database that stores the inspection cycle of measurement data, an inspection item extraction unit that extracts desired inspection items by interactive processing, and a judgment value database that imports the measured data from the measurement data storage area for the extracted inspection items A maintenance controller having an evaluation unit for fetching the determination data from the device, evaluating the measurement data, and outputting the evaluation result to the outside is provided. According to this means, the inspection items required for monitoring are added to the inspection items corresponding to the dialog input and displayed, so that the necessary inspection items can be extracted without omission and maintenance is performed at the same time. An inspection plan can be planned as soon as possible.

The invention of claim 6 is the first to third aspects of the invention.
In the control rod operation monitoring device described, a regular replacement parts database that describes parts that need to be replaced regularly, a replacement performance data storage area that stores the replacement performance data of the parts, and a time measuring unit that measures the operating time, Judgment unit that judges the necessity of replacement for each part in the regular inspection database based on the replacement result data of the corresponding part in the replacement result data storage area and the operating time of the time measuring unit, and outputs a message when replacement is required And a maintenance controller having and is provided. According to this means, if the replacement of the electric component that needs to be replaced regularly is not carried out even after the replacement time, the alarm is displayed on the screen of the display device so that it cannot be left without being replaced. Absent.

[0027]

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

FIG. 1 is a block diagram of a control rod operation controller showing a first embodiment of the present invention, and the overall configuration of the control rod operation monitoring device 100 is almost the same as that of FIG.

In FIG. 1, the same reference numerals as those in FIG. 9 showing the conventional example indicate the same or corresponding portions, and FIG. 1 shows a plurality of control rod selection units 8d and a plurality of drive command outputs in the control rod operation controller 8A of FIG. The section 8e, the switching means 20, the AND operation means 21, and the permission signal on / off means 22 are additionally provided, the reactor mode signal M is in the fuel exchange mode, and the permission signal is input from the permission signal on / off means 22. When the CRD hydraulic drive mechanism 3 corresponding to the four control rods can be driven by switching from the drive command signal A that enables the operation of one control rod to the drive command signal D, Have.

Here, the multiple control rod selecting section 8d generates multiple selection information for selecting a multiple control rod including the selected control rod from the control rod selection SW information. The multiple drive command output unit 8e outputs a multiple drive command signal from the multiple selection information and the control rod insertion or withdrawal signal. The AND operation means 21 determines that the reactor mode signal M is in the fuel mode, and
When the permission signal is input, the switching means 20 is switched to the other side 20a. The permission signal on / off means 22 inputs the permission signal to the logical product calculation means 21 by an input operation.

Next, the operation of the first embodiment of the present invention will be described.

Next, a case will be described in which the plant is stopped, the reactor mode SW is in the fuel exchange mode position, and the control rod operation for the CRD air vent is performed.

First, when the operator selects any one control rod from the control rod selection SW6 on the reactor control panel 5, the control rod selection SW signal o is input into the control rod operation controller 8A. . In the control rod operation controller 8A, the control rod selection SW signal o is input to the normal control rod selection unit 8a and the multiple control rod selection unit 8d, and each control rod address a1 is input.
1 and control rod address c. Here, the control rod address c is a signal in which the control rod addresses of the four control rod groups including the selected control rod address a11 are designated, and the control rod addresses (a11, a12, a13,
a14).

Subsequently, the control rod address a11 is input to the drive command output unit 8c, the drive command signal A is generated, and the control rod address c (a11, a12, a13, a14) is generated.
Is input to the multiple drive command output unit 8e, and the multiple drive command signal D is generated. Then, the drive command signal A is input to the one side 20a of the switching means 20, and a plurality of drive command signals D
Is input to the other side 20b of the switching means 20, and the switching means 2
By 0, it is switched to either one and the drive command signal A ′ is output.

The switching means 20 is configured to constantly select the drive command signal A, but during the CRD air vent, the permission signal on / off means 22 is turned on and the reactor mode signal M is set to m.
= 1, that is, in the fuel exchange mode, the logical product condition is satisfied by the logical product calculation means 21, and the switching means 2
0 is switched to the other side 20b, and the plural drive command signal D is output to the site drive unit 9 as the drive command signal A'from the control rod operation controller 8A.

In the field drive unit 9, a drive command signal A '
(A11, a12, a13, a14, a2, a3) to control rod address signal a11 to control rod address signal a
Substrate 9a1 to substrate 9 corresponding to four control rods 2 of 14
From a14, the directional control valves 4a to 4d corresponding to each control rod are excited. At this time, when the drive command signal a2 is 1, the control rod 2 is driven to the insertion side, and when the drive command signal a3 is 1, the control rod 2 is driven to the pulling side. As a result, when only one control rod 2 can be operated normally, when maintaining the CRD hydraulic drive mechanism 3 after the regular inspection, four control rods 2 can be operated simultaneously.

Next, during the plant operation, the reactor mode SW
A case where the position 13 is the operating position will be described.

When the operator selects an arbitrary control rod by the control rod selection switch SW6 to insert or pull out the control rod, as described above, in the control rod operation controller 8A, the drive command signal A and the plural drive command signal D are inputted. And are generated. In this case, when the reactor mode signal M is m = 3, that is, in the operation mode, even if the permission signal on / off means 22 is turned ON to switch to the permission side, the AND operation condition is not satisfied by the AND operation means 21. Therefore, the switching means 20 selects the drive command signal A side. Therefore, in the field drive unit 9, the board 9a11 corresponding to the control rod address signal a11 of the drive command signal A
To excite and drive the corresponding directional control valves 4a to 4d of one control rod.

As described above, according to the first embodiment of the present invention, since the four control rods can be simultaneously operated by the CRD air vent during the regular inspection, the control rod operating time can be shortened. . Further, when the position of the reactor mode SW13 is in the fuel exchange mode and when the switching permission is input, the configuration is such that four control rods can be driven at the same time. Since the SW 13 does not accidentally drive a plurality of control rods at the same time in the start-up or operation mode, the reactor power can be safely controlled.

FIG. 2 is a block diagram of a control rod operation controller showing a second embodiment of the present invention. Other configurations are as follows.
It is almost the same as in FIG.

In FIG. 2, the same reference numerals as those of the control rod operation controller 8 of the control rod operation monitoring device 100 of FIG. 9 showing the prior art indicate the same or corresponding parts, and the control rod operation controller 8B is the switching means 23. AND operation means 2
4 is additionally provided, and the simulated mode signal generator 15 and the permission signal on / off means 25 are connected to the outside so that the reactor mode signal is in the fuel exchange mode and the permission signal from the permission signal on / off means 25. Only when is ON, the reactor mode signal M is switched to the simulated mode signal M1 and output to the insertion / extraction interlock part 8b so that the interlock of the insertion / extraction interlock part 8b can be confirmed. Have.

Here, the simulation mode signal generator 15 outputs a reactor mode signal M for simulation. The switching means 23 outputs the reactor mode signal M to the insertion / extraction interlock unit 8b, while the reactor mode signal M changes from the reactor mode signal M only when the reactor mode signal M is in the fuel exchange mode and the permission signal is ON. Switching to the simulated reactor mode signal and switching to output to the insertion / extraction interlock unit 8b. The logical product calculating means 24 outputs a signal for switching the switching means 23 to the simulation side 23b when the logical product condition of the permission signal and the reactor mode signal M is satisfied. The permission signal on / off means 25 outputs a permission signal by an input operation.

Next, the case where the interlock confirmation of the control rod operation controller 8B is performed with the reactor mode signal M set to the fuel exchange mode when the plant is stopped will be described.

First, the reactor mode S on the reactor control panel 5
W13 is a fuel exchange position. At this time, when the interlock confirmation is performed at another mode position, when the tester turns on the permission signal on / off means 25, the ON signal and the reactor mode signal M are m = 1, that is, the fuel exchange mode. Is input to the logical product calculating means 24 and the logical product condition is satisfied.
As a result, the switching means 23 is switched from the operation side 23a to the simulation side 23b, and the reactor mode signal M'for simulation from the permission signal on / off means 25 is input to the insertion / extraction interlock portion 8b.

Next, the case where the plant is operating and the position of the reactor mode SW13 is the operating position will be described.

When the position of the reactor mode SW13 is in the operating position, the reactor mode signal M is m3 = 1.
In this case, even if the permission signal on / off means 25 is turned on, the fuel exchange mode of the reactor mode signal M is off, and in the logical product calculation means 24, the logical product condition is not satisfied and the switching means 2
In 3, the state in which the driving side 23a is selected is maintained.

As described above, according to the second embodiment of the present invention, since the interlock confirmation test can be performed from the simulated mode signal generator 15, the reactor mode SW13 may be changed depending on the test conditions of other control devices. There is no waiting time until the position of can be changed. Further, since the reactor mode signal M for simulation from the simulation mode signal generation unit 15 is used when the logical product condition of the ON signal of the permission signal on / off means 25 and the fuel exchange mode is established, the plant is configured. The simulated mode signal generator 15 is mistakenly operated during operation.
There is no risk that the reactor mode signal M from will be selected.

FIG. 3 is a partial block diagram of a control rod operation monitoring device showing a third embodiment of the present invention.

In FIG. 3, the same reference numerals as those in FIG. 9 showing the conventional example indicate the same or corresponding portions. In FIG. 3, a switching unit 26 is provided between the on-site position detecting unit 11 and the position detector 10. Thus, the contact signal B from each position detector 10 and the simulated contact signal B ′ from the simulated control rod position generator 16 can be switched to check the soundness of the position detection board 11ai.

Here, the switching unit 26 inputs a contact signal of an actual control rod that specifies the position of each control rod by a contact and outputs it to each position detection board of the site position detection unit 11, while controlling at the time of simulation. The signal is switched to the rod simulated position signal and is output to the corresponding position detection board of the site position detection unit 11. The simulated control rod position generation unit 16 outputs a control rod simulated position signal composed of a contact signal for confirming the soundness of the position detection board 11ai corresponding to each control rod of the site position detection unit 11.

Next, a case will be described in which the control rod position signal is changed in order to confirm the soundness of the position detection board 11ai of the site position detection unit 11 while the plant is stopped and the control rods are fully inserted.

First, in the switching unit 26, each switching means 27
A, 27B, ... are on the driving side 27Aa, 27Ba ...
・ It becomes. Here, for example, when the switching means 27A is switched to the simulated side 27Ab, the contact signal B from the position detector 10 is switched to the simulated contact signal B'from the simulated control rod position generator 16. As a result, the simulated contact signal B ′ is input to the position detection board 11a1 and the soundness of the position detection board 11a1 can be confirmed. Also, switching means 27B
Is switched to the simulated side 27Bb, the contact signal B from the position detector 10 is switched to the simulated contact signal B ′ from the simulated control rod position generator 16, and the position detection board 11ai is sequentially arranged.
The soundness of can be confirmed.

As described above, according to the third embodiment of the present invention, the position detection board 11a can be operated even during the plant operation.
If it is desired to confirm the soundness of i, the position detection board 11ai
By turning ON the switching means 27 of the switching unit 26 corresponding to, the simulated contact signal B ′ from the simulated control rod position generation unit 16 is generated.
Can be input to the position detection board 11ai, and the position detection board 11a can be connected to the position detection board 11ai from the simulated control rod position generator 16 without changing the connector.
Since it is possible to confirm the soundness of the substrate by inputting it to i, the time required for confirming the soundness of the substrate can be shortened.

FIG. 4 is a partial block diagram of a control rod operation monitoring device showing a fourth embodiment of the present invention.

In FIG. 4, FIG. 3 showing the third embodiment.
4, the same reference numerals denote the same or corresponding portions, and in FIG. 4, a switching unit 26A is provided instead of the switching unit 26,
A simulated control rod position generation unit 16A is provided in place of the simulated control rod position generation unit 16, and the contact signal B to the position detection board 11ai of the on-site position detection unit 11 is sequentially switched to the simulated contact signal B ′ without manual intervention. Corresponding position detection board 11
The feature is that the soundness of ai is confirmed.

Here, the switching section 26A outputs a switching signal by recognizing that the same address information as that of the switching means 31i has been input corresponding to each position detection board 11ai. The simulated control rod position generation unit 16A sequentially outputs the control rod address information and the corresponding simulated position contact signal as a control rod simulated position signal in a predetermined order and a synchronization signal including the address information at a timing. Have.

Next, a case will be described in which the simulated contact rod signal B'is input from the simulated control rod position generator 16A to the position detection board 11a1 of the site position detector 11 to check the soundness.

The simulated control rod position generator 16A first sets the control rod address bi to the control rod address b1, turns on the synchronizing pulse g0 for one pulse, and then sequentially shifts the position simulated contacts from S00 to S01, S02 ... ..And 1 contact each
Let N. Accordingly, the control rod address recognition unit 30b
Of i, i = 1, that is, the control rod address recognition unit 30
It is recognized that b1 is designated. Then, when the falling edge of the synchronizing pulse g0 is input, the switching means 31a1
Turn on. As a result, the simulated contact signal B'is input to the site position detection unit 11a.

Next, the case of inputting the simulated contact signal B'to the site position detection board 11a2 of the site position detection section 11 will be described. The simulated control rod position generation section 16A receives the input to the site position detection board 11a1 as follows. When the simulated contact signal B'is turned ON one contact at a time until the final simulated contact signal S48, the control rod address bi is set to 2 and the synchronization pulse g0 is set.
Emit. Therefore, the synchronization signal G becomes (g0, b2). Accordingly, the control rod address recognition unit 30b1 of the control rod address recognition unit 30bi is controlled by the control rod address b.
When the control rod address b2 changes from 1 and does not match with its own address, the switching means 31a is turned off, while
The control rod address recognition unit 30b2 matches its own address. As a result, the switching means 31b is turned on when the falling edge of the synchronizing pulse g0 is detected. Thereby, it becomes possible to input the simulated contact signal B ′ to the site position detection unit 11a2.

As described above, according to the fourth embodiment of the present invention, it is not necessary to reconnect the connector for inputting the simulated contact signal B'from the simulated control rod position generator 16A, and the simulated contact is provided. ON / OFF operation of the signal B'and O of the switching means 31i provided for each position detection board 11ai.
Since the N / OFF operation is sequentially executed without human intervention, the time required for checking the soundness of the substrate can be further shortened.

FIG. 5 is a block diagram of a control rod operation monitoring device showing a fifth embodiment of the present invention.

In FIG. 5, the same reference numerals as those in FIG. 9 showing the conventional example indicate the same or corresponding portions. In FIG. 5, the control rod operation monitoring device 100 is attached to the maintenance controller 17.
The display device 18 is additionally provided, and the cause of the failure is specified when the failure occurs.

Here, the maintenance controller 17 creates the occurrence event designation information based on the failure information and the operation information related to the control rod operation controller 8 and the position monitoring controller 12, and refers to the survey item database 17a to find the relevant information. And a failure factor estimation unit 17b that estimates a failure factor from the extracted research item list and outputs it to the outside. The display device 18 displays the survey result regarding the survey item list k, and inputs the interactive input gi with the operator.

Next, the operation of the fifth embodiment of the present invention will be described with reference to FIG. 6. When a board failure event related to the control rod operation controller 8 occurs, information from the control rod operation controller 8 is sent. E (ei) is the failure factor estimation unit 1
It is input to the occurrence event designation unit 17c in 7b. And
The occurrence event designation unit 17c outputs the occurrence event designation j to the survey item database 17a. Upon receipt of the occurrence event designation j, the investigation item database 17a outputs the investigation item list k corresponding to the occurrence event to the investigation item input unit d.

The survey item input section 17d outputs and displays the input survey item list k on the display device 18, and at the same time, displays the survey result on the survey item list k on the display device 18.
Is input by an interactive input gi with the operator. Similarly, when a board failure fi related to the control rod position monitoring controller 12 occurs, the occurrence event specification j is output from the occurrence event specification unit 17c in the failure factor estimation unit 17b to the investigation item database 17a, and the investigation item database 17a. The survey item list k corresponding to the occurrence event is input to the survey item input unit 17d.

As described above, according to the fifth embodiment of the present invention, when a device failure occurs, the investigation item corresponding to the occurrence event is displayed, so that the necessary investigation can be carried out immediately.
The time to identify the cause of failure and recover can be shortened.

FIG. 7 is a block diagram of a maintenance controller provided in the control rod operation monitoring device according to the sixth embodiment of the present invention.

In FIG. 7, the same reference numerals as those in FIG. 5 showing the fifth embodiment of the present invention indicate the same or corresponding portions. In FIG. 7, the maintenance data storage area 17e and the judgment value in the maintenance controller 17A are shown. It is characterized in that a database 17f, an inspection cycle database 17g, an inspection item extraction unit 17h having a first evaluation unit 17j, and a second evaluation unit 17k are provided to evaluate measurement data for inspection items.

Here, the measurement data storage area 17e stores measurement data such as substrate input / output characteristics for each regular inspection. The judgment value database 17f is a database for judging the quality of the measurement data of the substrate or the like.

The inspection cycle database 17g stores inspection cycles for substrates and the like. The inspection item extraction unit 17h inputs the measurement data ui from the measurement data storage area 17e and the determination value vi corresponding to the measurement data ui from the determination value database 17f to the first evaluation unit 17j at the request of the interactive input gi, and the determination value When the measurement data u1 has a small margin with respect to vi, the inspection item is added to the inspection item w from the inspection cycle database 17g, and then displayed on the display device as the inspection item 1.

In the second evaluation unit 17k, the measurement data ui of the last time before and the time before last is input to investigate the characteristic change situation, and the determination value vi of the long-term characteristic change is input from the determination value database 17f to determine the determination value. On the other hand, when the margin is small, it is added to the inspection item w regardless of the inspection cycle. The second evaluation unit 17k inputs the present measurement data u1 and the judgment value v1 corresponding to the measurement item, organizes and evaluates the test results, and displays the evaluation results on the display device 18 as the evaluation data q. To do.

Next, the operation of the sixth embodiment of the present invention will be described. First, the inspection at this time is conducted according to the inspection item 1 displayed on the display device 18, and the measurement data is interactively input from the display device 18. It is stored in the measurement data storage area 17e by gi. When it is necessary to extract the inspection item for the next inspection, the interactive input gi is input to the inspection item extraction unit 17h.

In the inspection item extraction unit 17h, the dialogue input gi
When the check data is received, the check item w for the next check is extracted from the check cycle database 17g, and at the same time, the measured data u1 is checked from the measured data storage area 17e and the measured value u1 is checked this time as the judgment value v1 corresponding to the measured data u1. Enter and. Then, the measurement data u1 is the determination v
If the margin is smaller than 1, the inspection item for enhancing the monitoring is added to the inspection item w regardless of the inspection cycle, and then the inspection item 1 is displayed on the display device 18.

On the other hand, the present measurement data u1 is sorted and compared with the judgment value v1, and the result of the quality judgment is displayed on the display device 18 as the evaluation data q.

Next, a case will be described in which an inspection item is extracted from a characteristic change situation regarding the same device.

When the inspection item extraction unit 17h receives the request from the interactive input gi, the past measurement data ui of the same device is input from the measurement data storage area 17e to investigate the characteristic change situation, while the judgment value database 17f is entered. Then, the determination vi regarding the characteristic change is input. If the characteristic change tendency has less margin than the determination vi, the inspection item 1 is added regardless of the inspection cycle.

As described above, according to the sixth embodiment of the present invention, since the inspection item required for monitoring is added from the measurement data to the inspection item corresponding to the interactive input, the inspection item is displayed. At the same time you can extract various inspection items without omission
A maintenance and inspection plan can be planned as soon as possible.

FIG. 8 is a block diagram of a maintenance controller provided in the control rod operation monitoring device according to the seventh embodiment of the present invention.

In FIG. 8, the same reference numerals as those in FIG. 5 showing the fifth embodiment of the present invention indicate the same or corresponding portions, and in FIG. 8, the replacement record data storage area 17m and the replacement record data storage area 17m are provided in the maintenance controller 17B. A periodic inspection database 17n, a time measuring unit 17p, and a determining unit 17q are provided,
The feature is that the parts that need to be replaced are output as a message.

Here, the replacement record data storage area 17m
Stores part replacement record data. The regular inspection database 17n describes parts that require regular replacement. The time measuring unit 17p measures the operating time. The determination unit 17q determines the necessity of replacement for each component in the regular inspection database 17n based on the replacement result data of the corresponding component in the replacement result data storage area 17m and the operating time of the time measuring unit 17p, and determines whether the replacement is necessary. When, the message is output.

Next, a case will be described in which an electrical component that needs to be regularly replaced is regularly replaced.

At the time of starting the operation, since the elapsed time t is smaller than the operating time T until each electric component needs to be replaced, the judgment unit 17q does not output the alarm signal s.
When the first replacement time comes and the replacement is performed, the actual result is stored in the replacement actual result data storage area 17m by the interactive input gi from the display device 18. In this case, the elapsed time t of the replaced component is calculated starting from after the replacement. Therefore, since the elapsed time t becomes smaller than the operating time T again, the determination unit 17q does not output the alarm signal s.

Next, when the replacement is not carried out at the replacement time or the replacement record data is stored in the replacement record data storage area 1
When forgetting to store in 7 m, the determination unit 17q detects that the elapsed time t is longer than the operating time T until the replacement. As a result, the alarm signal s is output to the display device 18.

In the display device 18, the maintenance controller 17
If there is an alarm signal s in the display signal hi from B, it is preferentially displayed in the alarm message area. From this, it can be confirmed that replacement is necessary.

As described above, according to the seventh embodiment of the present invention, an alarm is displayed on the screen of the display device when the replacement of the electrical parts which need to be replaced regularly is not carried out even after the replacement time. It is not left unreplaced because of the change.

[0086]

As described above, according to the first aspect of the present invention, while the reactor mode signal is output to the insertion / extraction interlock section, the reactor mode signal is in the fuel exchange mode and the permission signal is Only when it is ON, the reactor mode signal is switched to the simulated reactor mode signal and output to the insertion / extraction interlock part, so that the position of the reactor mode can be changed depending on the test status of other control devices. There is no waiting time until. Further, it is possible to eliminate the possibility that the simulated reactor mode signal is erroneously selected during the plant operation.

According to the second aspect of the present invention, the control rod simulated position signal is switched during the simulation and is output to the corresponding position detection substrate of the site position detection unit. Therefore, the position detection can be performed even during the plant operation. It is possible to confirm the soundness of the board and reduce the required time without reconnecting the connector to the board.

According to the third aspect of the present invention, each switching means has an address recognizing section, and a synchronizing signal including an address is inputted to input a control rod simulation signal to a corresponding position detecting board when the address is a self address. Since the switching is performed as described above, the switching is sequentially performed without human intervention, and the time required for confirming the soundness of the substrate can be further shortened.

According to the invention of claim 4, when the device failure occurs, the investigation item corresponding to the occurrence event is displayed, so that the necessary investigation can be carried out immediately, and the time until the failure cause is identified and the recovery is shortened. it can.

According to the invention of claim 5, the inspection item required for monitoring is added from the measurement data to the inspection item in response to the interactive input, and the necessary inspection items are not overlooked. Can be extracted and maintenance inspection plan can be drawn up immediately.

According to the sixth aspect of the invention, if the replacement of the electric component which needs to be replaced regularly is not carried out even after the replacement time, the warning is displayed on the screen of the display device so that the replacement cannot be carried out. It can eliminate the risk of being left alone.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control rod operation controller provided with a control rod operation monitoring device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a control rod operation controller provided in a control rod operation monitoring device showing a second embodiment of the present invention.

FIG. 3 is a partial configuration diagram of a control rod operation monitoring device showing a third embodiment of the present invention.

FIG. 4 is a partial configuration diagram of a control rod operation monitoring device showing a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a control rod operation monitoring device showing a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of a maintenance controller showing a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram of a maintenance controller of a control rod operation monitoring device showing a sixth embodiment of the present invention.

FIG. 8 is a configuration diagram of a maintenance controller of a control rod operation monitoring device showing a seventh embodiment of the present invention.

FIG. 9 is a configuration diagram of a conventional control rod operation monitoring device.

FIG. 10 is an explanatory diagram showing a control rod position detector.

FIG. 11 is an explanatory diagram showing a contact structure in the control rod position detector.

[Explanation of symbols]

3 CRD hydraulic drive mechanism 4a-4d Directional control valve 5 Reactor control panel 8 Control rod operation controller 8a Normal control rod selector 8b Insert / pull out interlock part 8c Drive command output section 8d Multiple control rod selector 8e Multiple drive command output section 9 Field drive 9ai substrate 10 Position detector 11 Field position detector 11ai Position detection board 11b, 12a Transmission unit 12 Position monitoring controller 12b signal converter 14 Monitoring device 15 Simulation mode signal generator 16 Simulated control rod position generator 17 Maintenance controller 17a Survey item database 17b Failure factor estimation unit 17c Occurrence event designation section 17d Survey item input section 17e Measurement data storage area 17f judgment value database 17g Inspection cycle database 17h Inspection item extraction section 17j First evaluation unit 17k Second evaluation section 17m Exchange result data storage area 17n Regular inspection database 17p time measurement section 17q judgment section 20, 23, 31 switching means 21, 24 AND operation means 22, 25 Permit signal on / off means 26 Switching unit 30 Control rod address recognition unit

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masaki Otsuka             No. 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation             Fuchu Office (72) Inventor Kazuhisa Hasegawa             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office F-term (reference) 2G075 BA17 CA25 FC05 GA15 GA27

Claims (6)

[Claims] 1. A control rod address for specifying a control rod to be operated is calculated from control rod selection SW information operated from a control panel, and a control rod insertion or withdrawal signal and a state of a reactor are displayed. A control rod operation controller that outputs a drive command signal for driving a control rod to be operated from a reactor mode signal, and a control valve is driven by the drive command signal to insert or pull out the control rod to be operated by water pressure. The position drive board that operates the hydraulic drive mechanism and the position detection board that is provided corresponding to each control rod that inputs the contact signal that specifies the position from each position detector of each control rod and each contact signal by this position detection substrate To the control panel, which receives the position signals and converts them into control rod position information. In a control rod operation monitoring device including a position monitoring controller for outputting, the control rod operation controller includes a normal control rod selection unit that calculates a corresponding control rod address from control rod selection SW information operated from a control panel, A drive command output unit that generates the drive command signal from the calculated control rod address; an insertion / pullout interlock unit that generates an insertion or pullout command signal by inputting an insertion or pullout SW signal and an operation permission signal; A reactor mode signal is output to the insertion / extraction interlock unit, while the reactor mode signal is in the fuel exchange mode and the permission signal is ON, the reactor mode signal changes to the simulated reactor mode signal. Switching means for switching and outputting to the inserting / withdrawing interlock part. Control rod operation monitoring device. 2. A control rod address for specifying a control rod to be operated is calculated from control rod selection SW information operated from the control panel, and an insertion or withdrawal signal of the control rod to be operated and a state of the reactor are displayed. A control rod operation controller that outputs a drive command signal for driving a control rod to be operated from a reactor mode signal, and a control valve is driven by the drive command signal to insert or pull out the control rod to be operated by water pressure. The position drive board that operates the hydraulic drive mechanism and the position detection board that is provided corresponding to each control rod that inputs the contact signal that specifies the position from each position detector of each control rod and each contact signal by this position detection substrate To the control panel, which receives the position signals and converts them into control rod position information. In a control rod operation monitoring device having a position monitoring controller for outputting, a control rod simulated position signal composed of contact signals for confirming the soundness of a position detection board corresponding to each control rod of the site position detection unit. And a simulated control rod position generation unit that outputs the actual control rod contact signal that specifies the position of each control rod by a contact and outputs the signal to each position detection board of the site position detection unit, while A control rod operation monitoring device, comprising: a switching unit for switching to a control rod simulated position signal and outputting to a position detection board corresponding to the site position detection unit. 3. The simulated control rod position generation unit outputs, as the control rod simulated position signal, address information of each control rod and a corresponding simulated position contact signal, and a synchronization signal including the address information. While the switching unit recognizes that the same address information as the switching unit and the self is input corresponding to each of the position detection boards, the switching unit simulates its own switching unit. An address recognition unit for each of the switching means for switching to, and a means for sequentially switching the corresponding switching means when the synchronization signal is input and sequentially outputting the control rod simulation signal to the corresponding position detection substrate. The control rod operation monitoring device according to claim 2, which is characterized in that. 4. An occurrence event designation based on a investigation item database describing investigation items corresponding to occurrence event information at the time of failure occurrence, and failure information and operation information related to the control rod operation controller and the position monitoring controller. A maintenance controller having a failure factor estimating unit that creates information, extracts a corresponding survey item list by referring to the survey item database, estimates a failure factor from the extracted survey item list, and outputs the estimated failure factor to the outside. The control rod operation monitoring device according to any one of claims 1 to 3, which is provided. 5. A measurement data storage area for storing measurement data for inspections in which characteristics of each circuit are measured for each inspection, a judgment value database for storing judgment value data for judging pass / fail of the measurement data, and a measurement data An inspection cycle database that stores inspection cycles, an inspection item extraction unit that extracts desired inspection items by interactive processing, and measurement data from the measurement data storage area for the extracted inspection items that are retrieved from the judgment value database. 4. The control rod operation monitoring device according to claim 1, further comprising a maintenance controller having an evaluation unit that executes evaluation of the captured measurement data and outputs the evaluation result to the outside. 6. A regular replacement parts database that describes parts that need to be replaced regularly, a replacement result data storage area that stores replacement result data of the parts, a time measuring unit that measures operating time, and the regular inspection. A determination unit that determines the necessity of replacement for each part of the database based on the replacement result data of the corresponding part in the replacement result data storage area and the operating time of the time measuring unit, and outputs a message when replacement is required. 2. A maintenance controller having a controller is provided.
A control rod operation monitoring device according to claim 3.