JPH0684995B2 - Control rod control device, reactor core status display device, and control rod operation determination device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control rod control device, a reactor core state display device, and a control operation determination device, and is particularly applied to a boiling water reactor and The present invention relates to a control rod control device, a core state display device, and a control rod operation determination device suitable for monitoring control rod operation.

[Conventional technology]

At nuclear power plants, including boiling water nuclear power plants,
After the operation of one fuel cycle is completed, the reactor is shut down and the fuel assembly and local power range monitor (LPRM), which is a kind of neutron detector, are operated. Periodic inspections such as replacement of control rods and control rod drive devices are carried out.

The fuel refueling is automatically performed by the fuel refueling machine by checking the setting data of the operator as shown in Japanese Patent Publication No. 58-21238. The LPRM replacement work is performed by using an in-core monitor replacement device and an installation worker as shown in Japanese Patent Publication No. 61-43676. For control rod replacement work, see JP-A-56-104290
As shown in JP-A-56-103399 and JP-A-56-103399, the fuel assembly around the control rod to be replaced is taken out, the fuel support fitting is taken out, and the control rod drive device is released, and then the control rod is removed. It is done by taking out. Installation of a new control rod is done in the reverse order of removing the control rod. The removal and mounting of the control rod drive device is performed by using the control rod drive device exchange device disclosed in Japanese Patent Publication No. 60-35035.

[Problems to be solved by the invention]

The time required for the above-mentioned fuel exchange, LPRM exchange, control rod exchange, and control rod drive device exchange work is considerably shortened by the adoption of the methods disclosed in the above-mentioned publications. However, the above four replacement works are in the critical path in the periodic inspection process of the reactor.
Therefore, in order to improve the operation rate of the nuclear reactor by shortening the periodic inspection process, it is desired to shorten the time required for the above-mentioned critical path.

A first object of the present invention is to provide a control rod control device, a control operation determination device, and a reactor component replacement method that can reduce the time required for the work of a critical path in a process.

A second object of the present invention is to provide a control rod control device having a simple structure.

A third object of the present invention is to provide a reactor core state display device in which operable control rods can be easily confirmed.

It is a fourth object of the present invention to provide a reactor component status display device capable of easily grasping the loading status of fuel assemblies in the core and fuel storage pool.

[Means for solving problems]

The first purpose is to determine whether or not the control rod can be operated based on loading information indicating a loading state of the fuel assembly in the core,
The determination result is output when the reactor is stopped, the control rod operation command and the determination result are input, and the control rod drive signal based on the operation command is output when the determination result is acceptable. Can be achieved.

A second object of the present invention is to move the fuel gripping means from a current position to a target position which is a designated destination, and to store the fuel stored in the storage means based on the movement of the fuel assembly by the fuel gripping means. A fuel exchange control means is provided for updating the loading information of the assembly, determining whether or not the control rod can be operated instructed by the control rod operation command based on the loaded information, and outputting the determination result. Can be achieved by

A third object of the present invention is image information creating means for creating information on the presence or absence of fuel assemblies and control rods in the core based on loading information indicating the loading state of fuel assemblies in the core and control rod position signals. And a display means installed in the operation room in which an operation panel for outputting an operation command for the control rod is arranged, and further for displaying the input information about the presence or absence of the fuel assembly and the control rod.

A fourth object of the present invention is to store means for storing loading information indicating loading states of fuel assemblies in the core and fuel storage pool, and a target position which is a destination to which the fuel gripping means is designated from the current position. To update the loading information stored in the storage means based on the movement of the fuel assembly by the fuel gripping means, and in the core and the fuel storage pool based on the loading information and the input control rod position signal. The fuel assembly and the control rod which are installed in the operation room in which the fuel exchange control means and the fuel exchange control means for creating the information on the presence or absence of the fuel assembly and the information on the presence or absence of the control rod in the core, respectively, are input This can be achieved by including a display unit that displays information regarding the presence or absence of

[Action]

Whether or not the control rod can be operated is determined based on the loading information indicating the loading state of the fuel assemblies in the core, and the determination result is output in the reactor stopped state. The control rod in the cell from which the fuel assembly has been taken out can be pulled out, and the time required for the work of the critical path in the process can be shortened.

Since it is determined based on the loading information that the control rod operation command instructed by the fuel exchange control means is input based on the input loading information, it is necessary to provide another processing device to make this determination. Therefore, the structure of the control rod control device can be simplified.

Since the information indicating the presence or absence of fuel assemblies and control rods in the core created based on the loading information indicating the loading state of the fuel assemblies in the core and the control rod position signal is displayed, the operator operating the control rods can The control rod that can be operated can be easily confirmed.

Information about the presence or absence of fuel assemblies in the core and fuel storage pool is displayed based on the loading information indicating the loading status of the fuel assemblies in the core and fuel storage pool. You can easily understand the loading status.

〔Example〕

A control rod control apparatus which is a preferred embodiment of the present invention applied to a boiling water reactor will be described with reference to FIG.

First, the schematic structure of a boiling water reactor will be described. The boiling water reactor has a reactor pressure vessel 38. The reactor pressure vessel 38 is installed on the pedestal 19. A control rod drive housing 20 is provided at the bottom of the reactor pressure vessel 38. FIG. 1 shows a state in which periodical inspection is being performed after the operation of the boiling water reactor has been stopped. The reactor pressure vessel 38 has an upper lid removed and an upper end opened. Water is filled in the reactor well 32. As shown in FIG. 2, a reactor core 34 having a fuel assembly 33 loaded therein is provided in a reactor pressure vessel 38. The control rod 22 detachably connected to the control rod drive device 21 is inserted between the fuel assemblies 33 when the reactor is stopped. The control rod drive device 21 is installed in the control rod drive device housing 20. The control rod drive device 21 connects drive water pipes 23A and 23B for moving a piston connected to the control rod 22. Each drive water pipe 23A and 23B has a control valve 24
It has A, 24B, 24C, and 24D.

In the core 32, four fuel assemblies surrounding one control rod 22
One cell is composed of 33 (Fig. 3). The upper ends of the four fuel assemblies that form the cells are inserted into one grid of the upper core lattice plate 24 installed at the upper end of the core 34. Each fuel assembly 33 is pressed against the core upper lattice plate 25 by the elastic member of the channel asuna 35 provided in each fuel assembly 33. Reference numeral 36 is a handle provided on the fuel assembly 33.

The refueling machine 31 is installed on the floor of the 5th floor of the reactor building,
It is configured to straddle the reactor well 32 and the fuel storage pool 30. The reactor building has a containment vessel (not shown) that houses the reactor pressure vessel 38 installed therein. The fuel storage pool 30 and the reactor well 32 are opened on the 5th floor of the reactor building and are connected to each other at the gate 31 as shown in FIG. A large number of fuel racks 37 are installed in the fuel storage pool 30. Fuel rack 37 is the core
It is used to load a used fuel assembly 33 taken out of the fuel cell 34, a new fuel assembly 33 loaded in the core 34, and a fuel assembly 33 taken out of the core 34 and returned to the core 34. The refueling machine 31 includes a traveling carriage 1, a traverse carriage 2, a grapple 3, a gripping device 4, and a hoist 5. The traveling carriage 1 includes the reactor well 32 and the fuel storage pool.
A pair of rails 6 installed on both sides of 30 are moved by a drive motor 8. The traverse vehicle 2 has a group 3, a gripping device 4 and a hoist 5, and is moved by a drive motor 9 on a pair of rails 7 installed on the traveling cart 1. The grapple 3 is moved up and down by the hoist 5 and the drive motor 9 and is rotated by the drive motor 11 to adjust the angle of the fuel assembly 33. Further, this glass 3 is composed of several expansion tubes, and a gripping device 4 is attached to the lower end thereof. Hereinafter, the traveling direction of the traveling carriage 1 is X,
The moving direction of the traverse vehicle 2 is Y, the raising and lowering of the glass 3 is Z,
The rotation is called θ. The position signal indicating the amount of movement of X, Y, Z, and θ is detected by each synchro oscillator (not shown) attached to each drive shaft of the fuel exchanger 31.

The fuel exchanger control device 12 includes a process input / output device 13, an arithmetic processing device 14, a memory 15, an operator console 16 and a printer 17. The operator console 16 has a display device (display) 18. The memory 15 includes the presence or absence of loading of the fuel assembly 33 at each position (X-YID coordinates) of the core, the loading position of the blade guide in the core, and the control rod.
Data on the insertion / extraction state of 22 and data on whether or not the fuel assembly 33 is loaded at each position (X-YID coordinate) of the fuel rack 37 in the fuel storage pool 30 and the loading position of the blade guide in the fuel rack 37. I remember. That is, the memory 15 stores "0" at a position where the fuel assembly 33 is not loaded, and "1" at a position where the fuel assembly 33 is loaded,
And, "2" is given to the position where the blade guide is loaded to store the loading state thereof.

The ID coordinate is not the coordinate indicated by the absolute distance of each of XY, but the coordinate display by the code attached to the fuel assembly loading position. For example, X of the fuel assembly 33 at the position W in FIG.
-The YID coordinates are (11, 1). ID coordinates are converted to absolute distance positions. The fuel exchanger control device 12 is installed in an operation room (referred to as a first operation room) on the fifth floor of the reactor building.

The control rod control device of the present embodiment is installed in the central operation room in a place different from the 5th floor of the reactor building. The control rod control device of this embodiment includes a control rod operation monitoring device 26, a control rod drive device control device 27, and an operation panel 28 having a control rod operation button 29. The control rod operation monitoring device 26 is a device different from the rod block monitor that prevents the control rod from being pulled out when the output locally rises due to the control rod withdrawal during the operation of the reactor. Control rod operation monitoring device 26
The switch 42 constitutes a control rod operation determination device. The control rod operation button 29 is provided corresponding to each control rod 22 shown in FIG. Control rod, not shown
The operation panel 28 is also provided with operation buttons for instructing the insertion and removal of 22. The operation panel 28 is provided with operation buttons 39 for starting and stopping a circulation pump (not shown) for supplying cooling water to the core 34 and a display device (display) 40. Control rod operation monitoring device
26, the output signal of the control rod position detector 41 and the data of the presence or absence of loading of the fuel assembly 33 at each position in the core 34 obtained by searching the memory 15 and the blade guide of the core 34. Enter the loading position data. The control rod position detector 41 is provided for each control rod driving device 21. The output signal of the control rod operation monitoring device 26 is input to the control rod drive device control device 27 via the switch 42. The switch 42 is opened / closed by a signal from an operation button 39 instructing switching of the operation mode of the nuclear reactor provided on the operation panel 28. For example, the switch 42 is closed when the operation mode of the fuel exchanger is set by the operation button 39, and the switch 42 is opened when the operation mode of the fuel exchanger is released by the operation button 39. In other words, the switch 42 is closed when the reactor is in a stopped state and opened when the reactor is started up (including when the reactor is in a critical state).

In the fuel exchange and the control rod exchange described above, the blade guide shown in FIG. 1 of JP-A-56-104291 is used to prevent the control rod from falling down during the work. The blade guide includes a pair of guide portions having the same sectional shape as the channel box of the fuel assembly 33. An example of the use of the blade guide is shown in FIG. 4 of the above-mentioned publication and page 2 of the above-mentioned publication, lower left column, line 6 to the same page, lower right column, line 15.

The control rod operation monitoring device 26 is a microcomputer and executes the processing procedure shown in FIGS. 5 and 6 when the reactor is shut down. These processing procedures are stored in the memory (not shown) of the control rod operation monitoring device 26, and are called and executed by the arithmetic processing means of the control rod operation monitoring device 26. First, the processing procedure of FIG. 5 will be described. Fuel exchange controller
Data regarding the loading states of the fuel assembly 33 and the blade guide in the core stored in the memory 15 of 12 are retrieved and input (step 43A). The data input last time and the data input this time are compared to determine whether or not the loading states of the fuel assembly 33 and the blade guide have changed in the core 34 (step 43B). If the loading condition changes, the step 43G is checked until it becomes "YES".
The processing of C, 43D and 43E (or 43F) is repeated. Step 43C indicates "Y" if there are no four fuel assemblies in the cell.
ES "and in the opposite case, it is judged as" NO ". If it is determined in step 43D that "the blade guide is present", the "empty cell loaded with the blade guide" is stored in the memory of the control rod operation monitoring device 26 in step 43E. Step 43
When it is determined in D that "there is no blade guide", "an empty cell in which the blade guide is not mounted" is stored in step 43F. An empty cell means a cell in which all four fuel assemblies do not exist. Step 43C
If the subsequent processing is performed for all cells, step 43
G becomes "YES", and the processing of FIG. 5 is completed. It should be noted that the input of the relevant data in the memory 15 by the step 43A is performed at a cycle in consideration of the movement of the fuel assembly 33 and the blade guide by the fuel exchanger 31.

The processing procedure of FIG. 6 has priority over the processing procedure of FIG. 5 when the operator in the central operation room (referred to as the first operator) presses the control rod operation button 29 corresponding to the control rod 22 desired to operate. And then executed. The first operator pushes the control rod operation button 29 and instructs the pull-out or insertion of the corresponding control rod with another operation button. Signals accompanying these instructions from the first operator are input to the control rod operation monitoring device 26 from the operation panel 28. The processing procedure of FIG. 6 is started from the judgment whether the instructed control rod operation is the pull-out operation or the insert operation (step 44A). In the pull-out operation, the processing after step 44B on the right side of the dashed-dotted line in FIG. 6 is executed, and in the case of insertion insertion, the processing after step 44J on the left-hand side of the dashed-dotted line is executed. The process shown in FIG. 6 for the pulling-out operation of the control rod 22 is performed when the control rods of the cell are pulled out after the four fuel assemblies 33 are taken out from the cell. The process shown in FIG. 6 for the insertion operation of the control rod 22 is performed when the control rod is inserted in advance when the fuel assembly is reloaded into the cell from which the four fuel assemblies have been removed. Be seen. Step 44B determines if all cells have fuel assemblies. If YES, core 34
It is determined whether or not all the control rods have been inserted in (step 44C). The insertion state of the control rod 22 is determined based on the input measurement value of the control rod position detector 41. Step 44
If the determination of C is "YES", step 44D is executed. Step 44D is the target of pull-out operation 1
The pull-out permission signal is output only to the control rod 22 of the book. If the determination of step 44C is "NO", the pull-out prevention signal for the other control rods 22 excluding the control rod 22 that has already been pulled out is output (step 44E). With respect to the judgment of "NO" at step 44B, the judgment of step 44F is further performed. Step 44F determines whether or not the cell in which the control rod to be pulled out is located (referred to as target cell) is an empty cell. If this determination is "NO", the processing of step 44C is performed, and "Y
In the case of "ES", it is determined whether or not there is a blade guide in the target cell of step 44G. The judgment of step 44G is "N
If it is "O", the control rod 22 that is the target of the pulling operation
The pull-out prevention signal for is output (step 44H).
If the determination in step 44G is "YES", a pull-out permission signal for the control rod 22 that is the target of the pulling-out operation is output (step 44I).

Steps 44J, 44K and 44L for inserting control rods
Will be described. The step 44J determines whether or not the cell in which the control rod 22 which is the target of the insertion operation is located is an empty cell and the blade guide is loaded in the cell. If the determination in step 44J is "NO", an insertion blocking signal for the control rod 22 which is the target of the insertion operation is output (step 44K). The judgment of step 44J is "YES".
If so, the step 44L is the control rod 2 which is the target of the insertion operation.
Output the insertion permission signal to 2. Steps 44D, 44E, 44H,
The signals obtained by the processes of 44I, 44K, and 44L are transmitted to the control rod driving device control device 27 and the computer 44 as the output of the control rod operation monitoring device 26 when the reactor is stopped.

The control rod drive control device 27 controls the setting signal of the control rod to be operated by the control rod operation button 29 of the first operator and the pull-out operation command (or insertion operation command) by another operation button.
And a pull-out permission signal (or an insertion permission signal) for the control rod to be operated from the control rod operation monitoring device 26, the pull-out drive signal (or Insertion drive signal) is output. The control rod 22 is pulled out and inserted by the opening degree control of the control valves 24A to 24D that constitute a hydraulic pressure control unit that controls the supply of driving water into the cylinder of the control rod drive device 21. When the control rod drive device control device 27 outputs a pull-out drive signal, the control valves 24A and 24D are opened, the control valves 24B and 24C are closed, and the piston (connected to the control rod 22) in the control rod drive device 21 is pushed down. As a result, the control rod 22 is pulled out from the core 34. Control rod drive controller
When 27 outputs the insertion drive signal, the control valves 24B and 24C are opened, the control valves 24A and 24D are closed, and the control rod 22 is inserted into the core 34. For example, in the refueling machine 31, as shown in FIG. 7, in X-YID coordinates (9, 13),
The fuel assemblies 33 at the positions (9, 14), (10, 13) and (10, 14) are taken out from the core 34, and the blade guides 45 are loaded at the positions (9, 14) and (10, 13). It has been done. Data on the loaded states of the fuel assemblies 33 and the blade guides 45 in the core 34 shown in FIG. 7 are stored in the memory 15. Control rod operation monitoring device that inputs these data 26
Stores the result in the processing procedure of FIG. 5 that the cell C ₁ is an “empty cell loaded with the blade guide” and stores it in its own memory.

When the first operator gives an instruction to pull out the control rod 22 of the cell C _{1 on} the operation panel 28, the control rod operation monitoring device 26 causes the step 44A to "pull out", the step 44B to "NO", and the steps 44F and 44.
It is determined to be "YES" in G, and the pull-out permission signal based on step 44I is output. Control rod drive control device 27 is a control panel
Since the pull-out operation command of the control rod 22 of the cell C ₁ from 28 and the pull-out permission signal of the control rod 22 of the cell C ₁ from the control rod operation monitoring device 26 are input, the pull-out drive signal to the corresponding control rod drive device 21. Is output. When the control panel 28 is instructed to pull out the control rods of cells other than the cell C _{1 in} the state shown in FIG. 7, the control rod operation monitoring device 26 outputs a pull-out prevention signal based on step 44H, so that the control panel 28 is output. The control rod 22 is not pulled out. Incidentally, the step 44B of the processing procedure of FIG.
If there are multiple cells satisfying the conditions of "NO" and steps 44F and 44G of "YES", all the control rods can be withdrawn in those cells while the reactor is stopped.

As described above, the control rod control device of the present embodiment is based on the loading state (presence or absence of loading) of the fuel assembly at each position of the core 34 and the loading state (loading position) of the blade guide when the reactor is in the stopped state. The control rod 22 can be pulled out from a plurality of empty cells. Even if the control rod is pulled out from such a plurality of empty cells, the fuel assembly does not exist adjacent to the control rod, so that the safety of the nuclear reactor can be sufficiently ensured. The control rod control device of the present embodiment can prevent the control rods from being withdrawn from the plurality of cells in which the fuel assemblies 33 are present, and the first operator can pull out the control rods 22 in the empty cells. Even if it is set to pull out the control rod 22 from the cell in which the fuel assembly 33 exists, the pulling out of the control rod 22 from the latter cell can be prevented. In the present embodiment, the data of the loading state of the fuel assemblies and the blade guides 45 in the core 34 stored in the memory 15 of the refueling machine control device 12 is used to determine whether the control rod operation is permitted or not. So
It is not necessary to newly provide a detector for detecting the loaded state in the core 34. The control rod control device of this embodiment uses the fuel exchanger 31 and the control device 12 thereof as a detector for detecting the loading states of the fuel assemblies 33 and the blade guides 45 in the core 34.

Since the control rod 22 can be pulled out and inserted into the empty cell without the blade guide, the control rod operation monitoring device 26 can be operated under the condition with and without the blade guide as shown in FIGS. 5 and 6. As described above, it is not necessary to use it for determining whether the control rod operation is permitted or not. Therefore, the control rod operation monitoring device 26 outputs the pull-out permission signal of the control rod to be pulled out when the control rod to be pulled out is located in the empty cell, and the control rod to be inserted is placed in the empty cell. An insertion permission signal for the control rod 22 may be output. The blade guide 45 is used to prevent the control rod 22 from tilting in the empty cell and to perform its vertical movement smoothly.

The control rod control device of the present embodiment enables the first operator to accurately grasp the control rod 22 that can be pulled out while the reactor is stopped. Therefore, the present embodiment has the computer 44. The function of the computer 44 will be described. Calculator 44
Are arithmetic processing means 44A and storage means 44 as shown in FIG.
B, input means 44C and output means 44D are provided. Memory 1
Data on the loading state of the fuel assembly 33 and the blade guide 45 in the core 34 stored in 5, the position signal of each control rod 22 measured by the control rod position detector 41 and the control rod operation monitoring device 26. The output signal is input from the input means 44C and stored in the storage means 44. Memory 15 and surface device 40
The output signal to is output from the output means 44D. The arithmetic processing means 44A displays an image on the display device 40 based on the processing procedure shown in FIG. 9 stored in the storage means 44B (an image of the fuel assembly, the blade guide and the control rod as viewed from above). Process to obtain. The processing procedure of FIG. 9 has steps 46A to 46H. Based on this processing procedure, an image of a plane figure in a state of being loaded or inserted in the core can be obtained. FIG. 10 shows a state in which the image is displayed on the display device 40. Here, the cell C ₂ is in a state in which the four fuel assemblies 33 and the blade guides 45 are not loaded and the control rod 22 is not inserted. The cell C ₃ is in a state in which the four fuel assemblies 33 are not loaded but the blade guides 45 are loaded and the control rods 22 are inserted. cell
In C ₄ , the four fuel assemblies 33 are not loaded, but the blade guide 45 is loaded, and the control rod 22 is also not inserted. The cell C ₅ is in a state where only one fuel assembly 33 is not loaded. By seeing such an image, the first operator can easily understand that the control rod of the cell C ₃ can be pulled out and the control rod of the cell C ₄ can be inserted. The first operator causes the operation panel 28 to output an operation command as described above when pulling out the control rod of the cell C ₃ or inserting the control rod of the cell C ₄ . Furthermore, since the grant flicker information on graphic information of abstractable control rod at step 46G, blinking shapes of the control rod of the cell C ₃ is the first operator is clearly an abstractable control rod Can be recognized. Step 46G recognizes that the control rod in the cell in which the blade guide is present and in which the control rod is inserted can be pulled out, and adds flickering information to the graphic of the control rod. Even if the processing of step 46G is omitted and the figure of the control rod that can be pulled out is not flicked in the image of FIG. 10, the first operator can see the above image and the first operator can pull out the control rod (cell C ₃ Control rod). Although not shown in FIG. 9, the arithmetic processing means 44 determines the axial direction of each control rod 22 in the core 34 based on the position signal of each control rod 22 output from each control rod position detector 41. The position is obtained and output to the memory 15. The memory 15 stores these control rod positions. Further, the arithmetic processing means 44 outputs the image information of the content of the signal output from the control rod operation monitoring device 26 (withdrawal permission, withdrawal prevention, insertion permission or insertion prevention) to the display device 40, and withdrawal prevention and insertion prevention. Outputs the image information of the cause to the display device. The steps for creating these image information are not shown, but the steps in FIG.
It takes place between 46G and step 46H. The output of the obtained image information is performed in step 46H. In this way, the display device 40 displays the determination result of the control rod operation monitoring device 26 and the cause when the result is “block”. The cause when the blocking signal is output is clarified by the control rod operation monitoring device 26 by checking. To understand the cause, specifically, see steps 44E and 44H in the processing procedure of FIG.
And 44K after the step (not shown). The information on the obtained cause is input to the computer 44.

FIG. 11 shows another processing procedure for obtaining a display image executed by the computer 44. This procedure has steps 47A-47K. Unlike the processing procedure of FIG. 9, the processing procedure of FIG. 11 is intended to display fuel assemblies and control rods that do not exist in the core, and an image of what exists in the core and the existence of it in the core. The color of the image is changed although it is not. An example of the display image obtained by the processing procedure of FIG. 11 is shown in FIG. Even if the processing of step 47J is omitted,
It can be understood that the control rod of cell C ₃ can be pulled out simply by looking at the image in FIG.

In the control rod control device of the present embodiment, the fuel exchanger 31 and its control device 12 that function as means for detecting the loading states of the fuel assemblies 33 and the blade guides 45 in the core 34 will be described below. Since the structure of the refueling machine 31 has already been described,
Here, the fuel exchanger control device 12 will be described in detail.

The position signal indicating the amount of movement of X, Y, Z and θ measured by each of the synchro oscillators described above is used as the process input / output device 13
Is converted into a digital signal and input to the arithmetic processing unit 14. The positional condition of the fuel exchanger shown in FIG. 4, that is, the position of the traveling carriage on the furnace (the position indicated by the alternate long and short dash line parallel to the Y axis in FIG. 4) and the position of the traverse carriage gate passing (the fuel parallel to the X axis in FIG. 4) Storage pool 30, gate 31 and reactor well
The position of the one-dot chain line passing through 32), the upper limit position of the gulp pull, the intermediate position, , Are detected by the limit switch and input to the arithmetic processing unit 14 via the process input / output 13 unit. Processor 14
Uses these signals for positioning control and monitoring.

The arithmetic processing unit 14 executes processing based on the processing procedure shown in FIG. 13 and FIG. 14 stored in the memory 15.
This procedure has steps 48A through 48R.

The operator of the refueling machine 31 in the first operation room (referred to as the second operator) has N target positions (target coordinate data) necessary for the refueling machine 31 to move during refueling carried out on one day. Is set on the operator console 16. This setting data is set in 9 digits, for example. If these 9 digits are referred to as Irohaniho het Chile from the left, i will set the target position as the reactor well 32 or the fuel storage pool 30. Furthermore, it is set whether there is a fuel assembly (or blade guide) there (one digit).

(I) Set C * when there is a fuel assembly (or blade guide) in the reactor well 32.

(Ii) Set C when there is no fuel assembly (or blade guide) in the reactor well 32.

(Iii) Set P * when there is a fuel assembly (or blade guide) in the fuel storage pool 30.

(Iv) Set P when there is no fuel assembly (or blade guide) in the fuel storage pool 30.

Loha is the X coordinate (2 digits) of the X-YID coordinate of the target position.
And Niho is the X coordinate (two digits) of the X-YID coordinate of the target position.

Loha and Niho are the X-coordinates of the respective target positions with respect to the pair of guide portions forming the blade guide 45.
The X coordinate of the target position for is set by Loha, and the remaining Niho is set as "00". Het is the Y coordinate (2 digits) of the X-YID coordinate of the target position, and Chile is the X-YID of the target position.
It is the Y coordinate (two digits) of the coordinates. Het and dust are Y coordinates of respective target positions with respect to the pair of guide portions of the blade guide 45. The Y coordinate of the target position with respect to the fuel assembly 33 is set as heat and the remaining dust is set as "00".

The step 48A causes the memory 15 to store the N target coordinate data set by the operator console 16. n
= 0 is set (step 48B), and n = n + 1 is calculated (step 48C). The nth target coordinate data is read from the memory 15 (step 48D). Fuel assembly at step 48E
It is determined whether the operation is the movement operation of 33 or the movement operation of the blade guide 45 at step 48N. Fuel assembly
The movement operation of 33 can be easily discriminated because both Niho and Chile are “00”. In the case of the moving operation of the fuel assembly, the processing of steps 48F to 48J is executed. Here, step 48G has steps 49A to 49D shown in FIG. In particular, the determination of step 49C and step 49D
By providing the above, it is possible to smoothly perform the work of reloading the fuel assemblies 33 in the empty cells while maintaining high safety. That is, it is possible to avoid loading the fuel assemblies into the empty cells when the control rods are not inserted. The step 48H has the processing procedure shown in FIGS. 3 and 4 of Japanese Patent Publication No. 58-21238. However, the processing of the first step "reading target coordinate data" and the last step "printing message before starting" in FIG. 3 is not executed. For an example of the treatment of step 48H, see Japanese Patent Publication No. 58-21
It is shown at columns 7, 21 to columns 8, 11 of the 238 publication. The “logging typewriter” in columns 8, 7, and 10 of the publication gazette corresponds to the printer 17 in this embodiment. There are eight types of work modes for automatic operation that are permitted in step 48H or (step 48R described later) (6 steps of (1), (2), (5) to (8)
Work).

(1) The fuel assembly (or blade guide) is taken from the fuel rack 33 to the core 34 (denoted as P → C *).

(2) Transfer the fuel assembly (or blade guide) from the fuel rack 33 to the core 34 (P * → C).

(3) The fuel assembly is taken from the fuel rack 33 to another fuel rack 33 (P → P *).

(4) The fuel assembly is transferred from the fuel rack 33 to another fuel rack 33 (P * → P).

(5) The fuel assembly (or blade guide) is taken from the core 34 to the fuel rack 33 (C → P *).

(6) Move the fuel assembly (or blade guide) from the core 34 to the fuel rack 33 (C * → P).

(7) The fuel assembly (or blade guide) is taken from one position of the core 34 to another position (C → P *).

(8) The fuel assembly (or blade guide) is moved from one position of the core 34 to another position (C * → C).

When both steps 48G and 48H become "movable", step
The refueling machine 31 moves to the target coordinates according to the work mode permitted in 48 (step 48I). This refueling machine 3
The movement of 1 will be described by taking as an example the case where the fuel is transferred from the position P where the fuel rack 33 exists to the position Q where the core 34 exists (P * → C).

The coordinates at the current position P of the fuel exchanger 31 are X, Y, Z,
θ, the coordinate of Q which is the transfer target is X ′, Y ′, Z ′, θ ′
(Fig. 4).

When the start-up is started, the Z-rise control is first performed, and the Z-stop is temporarily stopped at the upper limit position. Next, XY simultaneous control is performed. In the XY simultaneous control, the reference points A, B, and C are set in advance, and the processing unit 14 calculates a straight line route that passes through P → A → B → C → Q, and X and Y to ride on this route.
The drive amount of is output. That is, the deviations ΔX and ΔY from the current position are calculated by sequentially setting A, B, C and Q as target positions,
The one with the larger deviation is the constant speed, and the other is the speed calculated by the deviation ratio.

When the positioning at the target position Q is completed, the rotation angle adjustment θ control is performed next. Also in the θ control, the deviation Δθ between θ ′ and θ is calculated and the drive amount is output. When the θ control is completed, Z lowering control is then performed to move the fuel assembly to the core.
Insert in 34 Stop at.

The operation signal corresponding to each momentum described above is calculated by the arithmetic processing device.
It is transmitted from 14 to the corresponding drive motors 8, 9, 10, 11 via the process input / output device 13. By driving these drive motors, the hook of the gripping device 4 can be moved to the target position. In the automatic operation by the arithmetic processing unit 14, as described above, the operation in which Z rise → XY → θ−Z fall is one cycle is continuously performed.

After stopping at, the hook of the gripping device 4 is opened.

The grasping device 4 cannot grasp the fuel assembly unless the hook is opened, so the hook is always opened when going to get the fuel assembly. On the contrary, when the fuel assembly is transferred by the refueling machine 31, the hook must be opened because the fuel assembly must be grasped without fail. That is, it is determined whether or not the fuel assembly is currently grabbed in the hook state.

The same control as described above is performed for the operation of taking the fuel assembly. However, in this case, After stopping at, close the hook.

Step 48J is (P → C *), (P → P *), (C →
It is determined to be "NO" in the work modes of P *) and (C → C *), and "YES" in the other work modes. Step 48J
If the judgment is “YES”, the memory is saved in step 48K.
The data in 15 is updated. That is, in the memory 15, "1" is updated to "0" at the position where the fuel assembly 33 is taken out, and "0" is updated to "1" at the position where the fuel assembly 33 is newly loaded.

For moving the blade guide 45, step 48P
~ 48T processing is executed. Step 48Q has steps 50A-50F shown in FIG. In Step 48R,
The processing shown in FIGS. 17 and 18 is executed. In this process, the process of the two columns on the right side of FIG. 3 in FIGS. 3 and 4 of Japanese Patent Publication No. 58-21238 (the process after the determination of “is it on the target coordinate pool”) is deleted? Is almost the same as. If the judgment at step 48T is "YES", step
48K is executed. Details of step 48L are shown in FIG. The step 48L has steps 51A to 51G.
The process of step 51A is the same as the process of FIG. 11 except that step 47B is omitted. The image information obtained at step 48L is displayed on the display device 18 (one or two) provided in the operator console 16. The displayed image is shown in Fig. 4 (A) in plan view of the fuel storage pool 30 in which the fuel rack 37 is arranged and the core 34.
Similar to the figure, the presence or absence of the fuel assembly 33 and the like is displayed graphically. Further, the central processing unit 14 is a step 48G, 48H, 48Q
And the determination results of 48R (for example, movement possible, movement impossible, contents of permitted work mode and contents of abnormal state causing movement impossible) are displayed on the display device 18. For this reason, the second operator looks at the display device 18 and
The loaded state of the fuel assemblies inside the fuel storage pool 30 can be easily deteriorated.

The control rod control device of the present embodiment has the functions of the steps 48J, 48K and 48T of the fuel exchanger control device 12 as the fuel assembly in the core 34.
It is used to detect the loading status of 33 etc. In addition,
Completion of the movement of the fuel assembly and the blade guide to the target coordinates at steps 48J and 48T means that the movement mode is permitted. Can be detected by detecting The refueling machine control device 12 used in the present embodiment has the following effects in addition to those described above.

It is possible to prevent an abnormal operation of inserting the fuel assembly (or blade guide) currently grasped at the position where the fuel assembly (or blade guide) is inserted. Double checking of set data and stored data improves reliability and increases the operator's sense of security regarding the result of judgment.

2. Eliminate the wasteful work of grabbing a fuel assembly (or) at a position where there is no fuel assembly (or blade guide).

3. Check the movement of the refueling machine 31 before starting the operation of one cycle, so it is possible to prevent erroneous operation.

4. Since the control rod position signal is used as a condition to decide whether or not to move in steps 48G and 48Q, the safety of the reactor can be sufficiently secured.

5. Further, the fuel assembly 33 in the core 34 and the fuel storage pool 30.
Since the loading state of the blade guide 45 and the loading state of the blade guide 45 are displayed on the display device 18, the second operator can appropriately know the loading states of these, and can check the progress of the refueling work.

1. Adoption of the control rod control device shown in FIG. 1, particularly, the control rod operation monitoring device 26 connected to the memory 15 of the fuel exchange control device 12
By adopting the control rod control device having the above, the exchange process shown in FIG. 20 can be performed. That is, since the control rod control device of the present embodiment allows the control rods in the empty cells to be pulled out when the reactor is stopped, it is possible to carry out the work of taking out the fuel assembly 33 from the core 34 in advance. This fuel assembly take-out operation includes fuel exchange, LPRM exchange, control rod exchange and CDR.
The required fuel assemblies 33 for replacement are taken out, and these fuel assemblies 33 are loaded into a predetermined fuel rack 37 of the fuel storage pool 30. Some of the taken out fuel assemblies 33 have reached the end of their lives, some are returned to their original positions in the core 34, and some are loaded in positions different from the original positions in the core 34. Fuel storage pool
Store within 30. By taking out this fuel assembly 33,
Although some empty cells are formed in 34, the control rod 22 in the empty cells is pulled out by the instruction from the operation panel 28 as described above. In consideration of the above-mentioned replacement work, all the fuel assemblies 33 in a part of the core 34 are taken out and transferred to the fuel storage pool 30, and all the control rods in the region are completely withdrawn. Is possible. After the fuel assembly unloading work is completed, LPRM replacement work, control rod replacement work, and fuel assembly loading shuffling work are performed in sequence. The fuel exchanger 31 is also used for LPRM and control rod replacement work, but since the fuel assemblies have been removed over a wide area around the LPRM and control rods to be replaced and the control rods have been withdrawn, the LPRM and The control rod replacement work itself can be shortened compared to the conventional one. In the control rod exchanging work, the removal of the fuel support fitting is extremely easy because there is no fuel assembly in the surroundings, which contributes to the reduction of time. For fuel assembly loading and shuffling work,
The new fuel assemblies stored in the fuel storage pool 30 and the fuel assemblies taken out of the core 34 by the above-mentioned taking-out operation are loaded in predetermined positions in the core 34. The loading of the fuel assembly is carried out by the fuel exchanger 31 and its control device 12. In this embodiment, since the fuel assemblies are collectively taken out and then the fuel assemblies are collectively loaded, the time required for exchanging the fuel is significantly shortened. The process on the left side of the alternate long and short dash line in FIG. 6 is performed when the control rod is inserted into the empty cell during the fuel assembly loading shuffling operation.

The control rod drive unit 21 shown in Japanese Patent Publication No. 60-35035 is removed from the control rod drive unit housing 20, and the removed control rod drive unit 21 is carried out to the outside of the reactor containment vessel. Control rod drive unit 21 after inspection, repair, and inspection
The control rod drive device replacement work including the steps of loading the control rod drive device 21 into the reactor containment vessel and mounting the control rod drive device 21 in the housing 20 is parallel to the fuel assembly unloading work, LPRM replacement work, and control rod replacement work. Will be implemented. Such parallel work is performed by using the control rod drive device exchanging device different from the fuel exchanging device 31 in the former three exchanging works requiring the fuel exchanging device 31 and the former exchanging work. This was made possible by the fact that the degree of interference between the former replacement work and the latter replacement work was remarkably reduced by pulling out the control rod. When the control rod exchange work and the control rod drive device exchange work are performed in parallel, it is necessary to select the control rods to be exchanged and the control rod drive devices to be exchanged that are not connected to each other. This is because in the control rod drive device replacement work, it is necessary to prevent the outflow of the reactor water from the housing 20 by sealing the upper end portion of the housing 20 with the pulled-out control rod. In order to quickly perform the control rod drive device replacement work, in the initial stage of the fuel assembly take-out work, four bodies in the cell in which the control rod 22 connected to the control rod drive device 21 which is the object of inspection or the like is inserted. It is preferable to focus on the removal of the fuel assembly and the extraction of the control rod 22 from the empty cell. Considering the order of the control rods inserted in the empty cells, that is,
By avoiding the control rod drive unit connected to the control rods inserted into the empty cells at an early stage, some control rod drive unit replacement work will be performed in parallel with the fuel assembly loading and shuffling work. You may.

The fuel assembly, LPRM and control rods are the reactor components that are inserted into the core.

The control rod drive replacement work includes fuel assembly removal work,
It is performed in parallel with at least one operation of replacing the nuclear reactor components to be inserted into the core other than the fuel assembly and loading the fuel assembly.

In order to smoothly carry out the control rod drive device replacement work described above, it is necessary to carefully consider in advance and decide the exchange order, but it is advisable to display the control rod drive device that is currently replaceable. . That is, the operation room of the control rod drive device exchanging device (referred to as the second operation room) is provided in a place different from the operation room of the central control room and the fuel exchanger (a place outside the reactor containment vessel and inside the reactor building). Has been. Second
An operation panel for the control rod drive exchange device is installed in the operation room. An operator in the second operation room (referred to as a third operator) operates the control rod drive exchange device installed in the pedestal 19 below the reactor pressure vessel 38 while watching it with a television camera. Computer in the second operation room (second
Computer) is the output signal and memory of the control rod position detector 41
The display image is created by inputting the information on the loading state of fuel assemblies in the core within 15. That is, the second computer has the processing procedure shown in FIG. 11 and is "pullable" in step 47J.
Executed the procedure with the modified step 47J which was corrected to "connected to the control rod drive device capable of exchanging work",
The image in FIG. 12 is displayed on the display device in the second operation room. In order to execute the processing of the correction step 47J, the third operator inputs the position data of the control rod drive device, which requires maintenance and inspection in the current periodical inspection, into the second computer through the input device. In the correction step 47J, flickering information is added to the control rod graphic (fourth graphic) when the control rod connected to the control rod drive device requiring maintenance is pulled out from the empty cell. The third operator can know on the screen of the display device that the control rod drive device at the flickering control rod position is in a replaceable state.

A control rod control device according to another embodiment of the present invention will be described. This embodiment is structurally the same as the embodiment of FIG. The difference lies in the control rod operation monitoring device in the embodiment of FIG.
26 part of the processing procedure that the
It was executed in 12. In the present embodiment, the processing procedure (stored in the memory 15) executed by the arithmetic processing unit 14 of the fuel exchanger control unit 12 is shown in FIGS. 13 and 21. This processing procedure is the same as the processing procedure (FIGS. 13 and 14) executed by the arithmetic processing unit 14 in the embodiment of FIG. 1 with the identification processing of the empty cell of step 48U added. Step 48U
Specifically has steps 43A to 43G of FIG.
The result of step 48U, ie the information of steps 43E and 43F, is stored in memory 15. Therefore, the control rod operation monitoring device 26 in this embodiment executes the process of FIG. 6 after inputting the process result of FIG. 5 stored in the memory 15 without executing the process of FIG. . Also in this embodiment, the same effect as that of the embodiment of FIG.

A control rod control device according to another embodiment of the present invention will be described with reference to FIG. In this embodiment, the function of the control rod operation monitoring device 26 in the embodiment of FIG. 1 is added to the fuel exchanger control device 12. Therefore, in this embodiment, the hardware configuration of the control rod operation monitoring device 26 is unnecessary, and the hardware configuration is simplified as compared with the embodiment of FIG. Other effects of this embodiment are the same as those of the embodiment shown in FIG.

The processing procedure executed by the arithmetic processing unit 14 of the fuel exchanger control unit 12A in this embodiment is as shown in FIGS. 13 and 23. This processing procedure is the processing procedure shown in FIG. 21 in which step 48V is added after step 48U. Step 48V has steps 44A-44L shown in FIG. The operation permission signal (or operation blocking signal) obtained in this processing procedure is used as the control rod drive device control device 27.
Entered in.

A control rod control device according to another embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 1 is a control rod operation monitoring device.
While the output of 26 is transmitted to the control rod drive device control device 27, in the present embodiment, the output of the control rod operation monitoring device 26 is transmitted to the operation panel 28. A switch 52 is provided in the operation panel 28. The control rod operation button 29 is a control rod operation monitoring device.
It is connected to the control rod driving device control device 27 via the switch 52 as well as being connected to the control device 26. The switch 52 is closed when the withdrawal permission signal (or the insertion permission signal) is output from the control rod operation monitoring device 26. By closing the switch 52, the control rod operation command set by the control rod operation button 29 or the like is transmitted to the control rod drive device control device 27. The control rod drive device controller 27 outputs a drive signal corresponding to the operation command. This embodiment also produces the same effect as the embodiment of FIG.

A control rod control device according to another embodiment of the present invention will be described below. In this embodiment, the connection between the control rod operation monitoring device 26 and the memory 15 of the embodiment shown in FIG.
The load information of the fuel assemblies and the like in the inside is taken in by the arithmetic processing device 14 by the magnetic tape, the magnetic tape is carried to the central operation room, and the above information registered in the magnetic tape is the control rod operation monitoring device.
It is to be registered in 26 memories. Although the efficiency is lower than that of the embodiment shown in FIG. 1, the same effect can be obtained.

A control rod control device according to another embodiment of the present invention will be described with reference to FIG. In this embodiment, the operation command from the control rod operation button 29 is not input to the control rod operation monitoring device 26A, and the control rod drive device control device 27 responds to the input control rod operation command from the control rod operation monitoring device 26A. The drive signal is output when the operation permission signal is input. Control rod operation monitoring device 26
A executes the processing of steps 53A to 53K shown in FIG.
Control rod operation monitoring device 26A, first, the data of the presence or absence of the fuel assembly 33 in each position in the core 34 input, data of the loading position of the blade guide in the core 34 and the control rod position detector 41 was measured. It is determined whether or not there is a change in the position of the control rod 22 in the axial direction (step 53A). If none of the data has changed, follow steps 53B below.
~ 53K processing is not executed. If it is determined that there is a change in step 53A, the processing after step 53B is executed. The judgment results obtained at steps 53C, 53E, 53I, 53J and 53H are the control rod operation monitoring device 26A at step 53K.
Control rod drive controller 27
Is output to. This embodiment also produces the same effect as the embodiment of FIG. Further, the number of wirings for transmitting signals is smaller than that of the embodiment of FIG. 1, and the structure is simplified.

The control rod operation monitoring device 26 of FIG. 24 may be replaced with the above-mentioned control rod operation monitoring device 26A. However, in this case, the second
It becomes unnecessary to input the operation command by the control rod operation button 29 shown in FIG. 4 to the control rod operation monitoring device 26A. Such an embodiment can obtain the same effect as the embodiment of FIG.

The control rod drive device replacement work carried out in FIG. 20 is described in Japanese Patent Application No. 62-253702 on pages 14, 13 to 27, 15 and FIGS. 1 to 9 and 16. If the control rod drive device 21 is removed from the housing 20 and attached to the housing 20, the time required to remove the control rod drive device 21 can be further shortened and the degree of interference with the critical process shown in FIG. 20 can be eliminated.
The replacement work of the control rod drive device 21 in this embodiment, that is, the removal work of the control rod drive device 21, is a fuel assembly unloading work, an LPRM replacement work, a control rod replacement work and a fuel assembly loading work. It is performed in parallel with two tasks performed or in parallel with one of those tasks.

〔The invention's effect〕

According to the present invention, it is possible to shorten the time required for the critical path in the replacement process of the reactor components and improve the operating rate of the reactor.

Since it is determined based on the loading information that the control rod operation command instructed by the fuel exchange control means is input based on the input loading information, it is necessary to provide another processing device to make this determination. Therefore, the structure of the control rod control device can be simplified.

Since the information indicating the presence or absence of fuel assemblies and control rods in the core created based on the loading information indicating the loading state of the fuel assemblies in the core and the control rod position signal is displayed, the operator operating the control rods can The control rod that can be operated can be easily confirmed.

Information about the presence or absence of fuel assemblies in the core and fuel storage pool is displayed based on the loading information indicating the loading status of the fuel assemblies in the core and fuel storage pool. You can easily understand the loading status.

[Brief description of drawings]

FIG. 1 is a block diagram of a control rod control device which is a preferred embodiment of the present invention, FIG. 2 is a schematic plan view of the reactor core of FIG. 1, and FIG. 3 is an enlarged view of a III part of FIG. FIG. 4 (A) is a plan view of the fuel storage pool and the reactor well provided on the floor on which the fuel exchanger of FIG. 1 runs, and FIG. 4 (B) is a vertical cross-sectional view of the fuel storage pool and the reactor well. , Figures 5 and 6 show the first
FIG. 7 is an explanatory view of a processing procedure executed by the control rod operation monitoring device, FIG. 7 is an explanatory view showing a state in which all fuel assemblies in the cells are taken out in the core of FIG. 2, and FIG. Figure calculator 44
FIG. 9 is an explanatory view showing a processing procedure of core state display executed by the computer of FIG. 1, FIG. 10 is an explanatory view showing a display image obtained by the processing procedure of FIG. 9, FIG. 11 is an explanatory view of another embodiment of the processing procedure of FIG. 9, FIG. 12 is an explanatory view showing a display image obtained by the processing procedure of FIG. 11, FIG.
FIG. 14 is an explanatory view of a processing procedure for moving a fuel assembly or the like which is executed by the refueling machine control device of FIG. 1, and FIG.
Explanatory diagram showing the detailed contents of step 48 in FIG. 13, FIG.
13 is an explanatory diagram showing the detailed contents of step 48Q in FIG. 13, FIGS. 17 and 18 are explanatory diagrams showing the detailed contents of step 48R in FIG. 13, and FIG. 19 is a detailed content in step 48L of FIG. Explanatory diagram, FIG. 20 is an explanatory diagram showing a replacement work process, FIGS. 21 and 23 are explanatory diagrams of another embodiment of the processing procedure of FIG. 14, and FIG.
FIG. 24, FIG. 25 and FIG. 25 are configuration diagrams of a control rod control device which is another embodiment of the present invention, and FIG. 26 is an explanatory diagram of a processing procedure carried out by the control rod operation monitoring device of FIG. 25. is there. 3 ... Grapples, 4 ... Grasping device, 8, 9, 10, 11
...... Drive motor, 12 …… Refueling machine control device, 14 …… Central processing unit, 15 …… Memory, 18, 40 …… Display device, 21 ・ ・ ・
… Control rod drive device, 22 …… Control rod, 26 …… Control rod operation monitoring device, 27 …… Control rod drive device control device, 28 …… Control panel, 29 …… Control rod operation button, 30 …… Fuel storage Pool,
31 …… Refueling machine, 32 …… Reactor well, 33 …… Fuel assembly, 34 …… Core, 41 …… Control rod position detector, 44 …… Calculator.

Claims (19)

[Claims] 1. A means for storing loading information indicating a loading state of a fuel assembly in a core obtained based on movement of a fuel exchanger, and an operation panel for outputting an operation command for a control rod in the core. And a control rod operation determining means for determining whether or not to operate the control rod instructed by the operation command based on the input loading information, and outputting the determination result in a reactor in a stopped state, and the operation. A control rod control device comprising: a control rod drive device control means which inputs a command and the determination result, and outputs a control rod drive signal based on the operation command when the determination result is acceptable. 2. The control rod operation determining means determines whether or not the operation of the control rod is instructed based on the input position of the control rod and the input loading information, and the result of the determination is used as a shutdown state of the reactor. 2. The control rod control device according to claim 1, which is a means for outputting. 3. A means for storing loading information indicating a loading state of a fuel assembly in a core, an operation panel for outputting an operation command of a control rod in the core, and an operation command instructed by the operation command. Determined based on the loading information input whether the operation of the control rod is input, the control rod operation determination means for outputting the determination result in the reactor stopped state, the operation command and the determination result is input, A control rod control device comprising a control rod drive device control means for outputting a control rod drive signal based on the operation command when the determination result is acceptable. 4. A means for storing loading information indicating a loading state of a fuel assembly in a core obtained based on movement of a fuel exchanger, and an operation panel for outputting an operation command for a control rod in the core. And the operation of the control rod is determined based on the input loading information, the control rod operation determination means for outputting the determination result in the reactor stopped state, the operation command and the determination result is input. A control rod drive device control means for outputting a control rod drive signal based on the operation command when the determination result is acceptable. 5. A means for storing loading information indicating a loading state of a fuel assembly in the core obtained based on the movement of the fuel exchanger, and an operation panel for outputting an operation command for a control rod in the core. And the control rod operation determination means for determining whether or not the control rod is instructed by the operation command based on the input loading information, and outputting the determination result in the reactor stopped state, Control rod drive device control means for outputting a control rod drive signal based on the operation command, and means for transmitting the input operation command to the control rod drive device control means when the determination result is acceptable Control rod control device. 6. A means for storing loading information indicating a loading state of a fuel assembly in a core obtained based on movement of a fuel exchanger, and an operation panel for outputting an operation command for a control rod in the core. And a control rod operation determining means for determining whether or not to operate the control rod based on the input loading information, and outputting the determination result in the reactor stopped state, and the control rod based on the input operation command. A control rod control device comprising: a control rod drive device control means for outputting a drive signal; and a means for transmitting the input operation command to the control rod drive device control means when the determination result is acceptable. 7. The control rod control device according to claim 6, wherein means for transmitting the operation command input when the determination result is acceptable is provided in the operation panel. 8. A means for storing loading information indicating a loading state of a fuel assembly in a core, an operation panel for outputting an operation command of a control rod in the core, and whether or not the control rod can be operated. A control rod operation determination unit that makes a determination based on the input loading information and outputs the determination result when the reactor is in a stopped state, and a control rod drive device control that outputs a control rod drive signal based on the input operation command. A control rod control device comprising means and means for transmitting the input operation command to the control rod drive device control means when the determination result is acceptable. 9. A means for storing loading information indicating a loading state of a fuel assembly in a core and a fuel gripping means are moved from a current position to a target position which is a designated destination, and the fuel gripping is performed. Refueling control means for updating the loading information stored in the storage means based on the movement of the fuel assembly by means, an operation panel for outputting an operation command for the control rods in the core, and the operation command Based on the loading information input whether the operation of the control rod is instructed is determined, the control rod operation determination means for outputting the determination result in the reactor stopped state, the operation command and the determination result And a control rod drive device control means for outputting a control rod drive signal based on the operation command when the determination result is acceptable. 10. A means for storing loading information indicating a loading state of a fuel assembly in a core and a fuel gripping means are moved from a current position to a target position which is a designated destination, and the fuel gripping is performed. A fuel exchange control means for updating the loading information stored in the storage means based on the movement of the fuel assembly by means, an operation panel for outputting an operation command for the control rod in the core, and a control rod for the control rod. Control rod operation determining means for determining whether or not operation is possible based on the input loading information, and outputting the determination result in a reactor shutdown state, and control for outputting a control rod drive signal based on the input operation command A control rod control device comprising: rod drive device control means; and means for transmitting the input operation command to the control rod drive device control means when the determination result is acceptable. 11. A means for storing loading information indicating a loading state of a fuel assembly in a core, an operation panel for outputting an operation command for a control rod in the core, and a fuel gripping means from the current position. To the target position which is the destination
Updating the loading information stored in the storage means based on the movement of the fuel assembly by the fuel gripping means,
Judgment based on the loading information that inputs whether or not to operate the control rod instructed by the operation command, and input the fuel replacement control means that outputs the judgment result, the operation command and the judgment result, A control rod control device comprising: a control rod drive device control means for outputting a control rod drive signal based on the operation command when the determination result is acceptable. 12. A means for storing loading information indicating a loading state of a fuel assembly in a core obtained based on movement of a fuel exchanger, and the means based on the loading information and an input control rod position signal. The image information creating means for creating information on the presence / absence of the fuel assembly and the control rods in the core and the operation panel for outputting the operation command of the control rods are installed in the operation room, and the fuel assembly input A core state display device having a body and display means for displaying information on the presence or absence of control rods. 13. Means for storing loading information indicating a loading state of a fuel assembly in the core, and first graphic information of the fuel assembly loaded in the core based on the loading information. Image information creating means for creating second graphic information of the control rod inserted into the core based on the created control rod position signal and an operation panel for outputting an operation command of the control rod are arranged. And a display means for displaying the figures of the fuel assembly and the control rod on the basis of the input first and second graphic information. 14. Means for storing loading information indicating a loading state of a fuel assembly in a core, first graphic information of the fuel assembly loaded in the core based on the loading information, and The second graphic information of the fuel assemblies not loaded in the core is created, and the third of the control rods inserted in the core is generated based on the input control rod position signal.
Graphic information, fourth control rod not inserted in the core
The image information creating means for creating graphic information and the operation panel for outputting the operation command of the control rod are installed in the operation room, and the input first, second, third and fourth graphic information A core state display device comprising display means for displaying graphics of the fuel assembly and the control rod based on the display. 15. The image information creating means is configured to create identification information for the control rod that can be pulled out from the core and to output the identification information to the display means. Core status display device. 16. A means for storing loading information indicating a loading state of a fuel assembly in a core and a fuel storage pool, and a fuel gripping means are moved from a current position to a target position which is a designated destination. Updating the loading information stored in the storage means based on the movement of the fuel assembly by the fuel gripping means, and further based on the loading information and the input control rod position signal, the core and the fuel storage pool Installed in the operation room in which the fuel exchange control means is arranged, and the fuel exchange control means for creating the information regarding the presence or absence of the fuel assembly in the interior and the information regarding the presence or absence of the control rod in the core A display unit for displaying the status of a fuel assembly and control rods, and a display unit for displaying information on the presence or absence of control rods. 17. The control rod operation command instructed by the input control rod operation command is determined based on the input loading information indicating the loading state of the fuel assembly in the core, and the determination result. Is a control rod operation determination device that outputs a signal when the reactor is stopped. 18. The control rod operation instructed by the input control rod operation command is determined based on the input position of the control rod and the loading information indicating the loading state of the fuel assembly in the core. A control rod operation determination device comprising a determination means and a means for outputting the determination result when the reactor is in a stopped state. 19. A plurality of fuel assemblies are taken out of a core having a plurality of cells composed of a plurality of fuel assemblies surrounding a control rod, and the control is performed from inside the cells from which all the fuel assemblies are taken out. After the rod is pulled out and the work of taking out the fuel assembly is completed, unlike the fuel assembly, the work of replacing the reactor component inserted into the core is performed, and after the work of replacing the reactor component is completed, the fuel is The assembly is loaded into the core, and the control rod drive device replacement work is performed in parallel with at least one of the fuel assembly unloading work, the reactor component replacement work, and the fuel assembly loading work. To replace nuclear reactor components.