JP2002014191A - Reactor core work monitoring device and monitoring method at periodic inspection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reactor core work monitoring device which solves the problem that conventionally a reactor core work cannot be monitored in a reactor core work monitoring device at periodic inspection, when a fuel exchange control device is in a mode other than the automatic mode. SOLUTION: The reactor core work monitoring device is provided with a means for detecting an operation mode of a fuel exchange control device; a means for reading-in a fuel exchange procedure data previously prepared for a fuel exchange; a means for reading-in a fuel number and procedure target position included in the fuel exchange procedure data; a means for fetching a target position which the fuel exchange control device sets prior to a movement of fuel each time; a means for comparing the procedure target position of fuel of the fuel number, which the fuel number/procedure target position reading-in means reads-in with a target position which the target set data reading-in means reads-in and monitoring a coincidence/ incoincidence of both positions when the fuel exchange control device is at an operation mode other than the automatic mode; and an alarm generating means for informing that the target position set by the fuel exchange control device is erroneous, when the procedure target position does not coincide with the target position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core work monitoring apparatus for monitoring fuel loading and control rod operation in a core during regular inspection of a boiling water reactor.

[0002]

2. Description of the Related Art Generally, in a boiling water nuclear power plant, a periodic inspection is performed about every year. In this periodic inspection, the fuel exchange control device performs fuel transfer such as replacement of fuel assemblies or shuffling of the injected core, disassembly and inspection of the control rod drive mechanism, and replacement of control rods.

[0003] In such regular inspection core work, control rod information, core or pool information, neutron flux information, core work procedures and the like are centrally managed in order to ensure subcriticality by operators, and operation monitoring is performed. A supporting core work monitoring device at regular inspection is used.

[0004] When the system is started, the regular inspection core work monitoring device first takes in data of fuel loading and control rod operation procedures related to the core work referred to by the refueling control device during its operation.

FIG. 2 shows an example of the format of the procedure data. FIG. 1 is an example of the procedure data for fuel removal, which includes a procedure number, a fuel number, grasping coordinates, a story coordinate, a start time,
And end time.

[0006] The first trigger of the work starts with the operation of the button by the operator, and even if it is automatic, the operator performs the operation while confirming by the button operation every cycle of each procedure number. That is, each time the refueling control device proceeds with each procedure, the start and completion signals of the procedure are transmitted to the regular inspection core work monitoring device.

In order to monitor the position information and the operating state of the refueling control device in real time, the transmission is periodically taken in every 5 seconds.

There is a procedure data package for extracting used fuel and a procedure data package for inserting another new fuel, and these are exchanged. In order to monitor the replacement of the procedure data package, the cycle data taken periodically from the refueling control apparatus includes the procedure data registration date and time on the refueling control apparatus side as described above.

The core operation monitoring device at regular inspection always monitors the above procedure registration date and time, and if a data package with a date and time newer than the currently stored procedure data package is registered, the new procedure data is renewed. The package is taken from the refueling control device, and as a result, the core operation is constantly monitored with the latest procedure data.

As shown in FIG. 3, the position information of the refueling control device includes, on the reactor core and the pool, a bridge position set in a direction of a canal connecting the core and a pool, and a bridge position on the bridge with respect to the canal direction. There is a trolley position set at right angles to the trolley, and a hoist position set at right angles to the bridge and the trolley surface. The current position of the fuel exchange control device is monitored based on the three-dimensional positioning information.

The displacement of the bridge and the trolley is detected by a gear, the extension of a hoist or a wire is converted into the rotation of a caterpillar, and the displacement is detected by a gear.

The control modes of the refueling machine of the refueling control device include a refueling machine automatic mode in which the in-core operation is carried out mainly by a computer based on procedural data, and a target fuel position is manually set to reach the coordinate point. There is a semi-automatic mode in which the operation of the above is automatically performed, and a manual mode in which the core operation target is manually set and manually operated.

When the refueling control device is in the automatic mode, the core operation monitoring device at regular inspection takes in advance the setting contents of the procedure data, and the procedure data and the operation content of the next operation of the refueling control device are taken. Monitor if the procedure data matches.

However, if the fuel loading operation that matches the procedure cannot be performed due to deformation of the fuel shape or the like during the refueling operation, procedure bypass processing is performed at the discretion of the operator to bypass the procedure in question. To a pre-planned feasible fuel loading procedure.

Further, the control rod operation state executed in conjunction with the above-mentioned operation in advancing the fuel loading is connected to the control rod operation monitoring device, and the control rod position, control rod full insertion, control rod full removal, control rod The rod number information is taken in over the entire core to monitor the core work.

[0016]

The conventional core operation monitoring device at regular inspection is often actually installed in a power plant after the refueling control device. Is normally required to be kept to a minimum, and the specification revision on additional modification is greatly restricted.

In such an environment, when the fuel exchange control device is in a mode other than the automatic mode as described above, the fuel exchange control device is configured to perform the fuel exchange control device in the automatic mode due to the restrictions of the program. Core work monitoring by acquiring the position information of the equipment was not possible.

That is, when performing a manual operation that may cause a human error, the fuel exchange control device is not in the automatic mode even though the target position can be manually set, but the fuel exchange control device is not in the automatic mode. There was a problem that the target position could not be monitored by the manual joystick operation of the exchange control device.

In the conventional regular inspection core work monitoring device, when a planned procedure is temporarily bypassed for a plurality of procedures during operation, there is no start / completion signal of the bypassed procedure, and thus the bypass is performed. From then on, there is a problem that the procedure monitoring is not executed until the procedure start signal taken in from the refueling control apparatus coincides with the procedure start signal in the regular inspection core work monitoring apparatus.

In the fuel loading operation on the core,
In some cases, the fuel cannot be properly loaded at the original target position due to the curvature of the fuel itself or interference with the core. In that case, the fuel exchange control device must be manually operated to a core position different from the original target position. The operation will be performed by the operator's judgment in the semi-automatic mode or the manual mode, but since it is not in the automatic mode, monitoring of the manual operation will be performed even if it is a loading accident deviating from normal operation. However, there is a problem that no record of the state can be left.

If the procedure is skipped by the bypass process and the operation of the bypassed procedure must be executed retroactively for some reason, the refueling machine is operated in a mode other than the automatic mode. Will be. For this reason, the start / completion signal of each procedure, which is transmitted only when the refueling control device is automatic, cannot be received by the core operation monitoring device at regular inspection, and the operation time of the bypassed procedure cannot be recorded. There was a problem.

Further, since the procedure data is managed by the fuel exchange control device, control rod information not directly related to the fuel exchange control device includes a fuel exchange of a procedure start signal and a completion signal corresponding to fuel loading. There is no transmission from the control device, and among the fuel operation and the control rod operation constituting the procedure, there is a problem that the actual execution time of the control rod operation cannot be recorded.

Further, the core loading state and the control rod position information created by the operation information related to the core operation monitoring, which is integrated and monitored by the core operation monitoring device at the regular inspection, are very important for the refueling machine operator. However, since there is no display system that can satisfy the installation conditions, there is a problem that the refueling machine operator cannot directly and in real time know the progress of the core work. As installation conditions, it was necessary to select only the monitoring information desired to be viewed at the site, and to perform long-distance transmission exceeding 100 m.

Further, since the operation history during core work recorded by the core operation monitoring device at regular inspection can be confirmed only on the display screen of the core operation monitoring device at regular inspection, the entire core operation of thousands of lines can be performed. After the completion of the above, there is a problem that the operation results such as the required time required for each fuel loading cannot be analyzed by the computer. It is an important task of regular inspection work to rationalize workability by summing up required time and performing workability evaluation.

Also, when the refueling machine in any mode other than the automatic mode loads each fuel into the target grid on the core, the manual target position setting operation at the time of the procedure bypass, the influence of the water flow in the core, or the fuel itself is not performed. In the event that fuel cannot be loaded normally at the calculated target position of the refueling machine due to deformation, a manually set target position may be provided separately.In this case, the fuel holding part of the refueling machine and the grid of the core Since the relative position with respect to the core was not monitored, there was a problem that the fuel gripping part might get on the grid end of the core.

[0026]

According to a first aspect of the present invention, there is provided a regular inspection core work monitoring device which performs a fuel exchange control device and a control rod when performing a fuel exchange operation in a reactor core during a regular inspection. In the regular inspection core work monitoring device that exchanges data with the operation monitoring device and monitors the loading and unloading of nuclear fuel and control rods from the injected fuel core by the fuel exchange control device, the fuel exchange control device and Signal exchange means for transmitting and receiving data to and from the control rod operation monitoring device and detecting each operation mode including at least automatic and non-automatic modes of the refueling control device, and prepared in advance for refueling, and Fuel exchange procedure data reading means for reading refueling procedure data including a refueling procedure number to be taken at system startup unless there is a change; fuel included in the refueling procedure data A fuel number / procedure target position reading means for reading a number and a procedure target position; a target setting data reading means for taking in a target position set before the fuel is moved by the fuel exchange control device each time; At the time of an operation mode other than the automatic mode, comparing the fuel procedure target position read by the fuel number / procedure target position reading means with the corresponding fuel number and the target position read by the target setting data reading means. A procedure target position / target position monitoring means for monitoring the coincidence / mismatch between the two, and when the procedure target position does not match the target position, notifies that the target position set by the fuel exchange control device is incorrect. And an alarm generating means.

According to the first aspect of the present invention, the correctness of the fuel exchange control device information can be monitored by performing the acquisition of the fuel exchange control device information which can only be performed in the conventional automatic mode in a mode other than the automatic mode.

For example, in the function of monitoring the operation status of the fuel exchange control device, in the semi-automatic mode of the fuel exchange control device including a human operation operation by the joystick operation of the operator, the fuel exchange control device side during the semi-automatic operation monitoring. The operation target position output from the system is compared with the fuel coordinates of the fuel number specified by the procedure read from the refueling procedure information stored in the core operation monitoring device during regular inspection, and the semi-automatic A deviation between the target position set in the operation mode and the set position in the procedure can be detected.

According to a second aspect of the present invention, there is provided the regular inspection core work monitoring device according to the first aspect.
When performing a manual operation in an operation mode other than the automatic mode, a refueling procedure bypass means for allowing a procedure based on the procedure data read by the refueling procedure data reading means to proceed to the next procedure, A procedure search means for searching which procedure the current procedure after jumping by the refueling procedure bypass means corresponds to the procedure read by the refueling procedure data reading means; and a procedure number for the procedure before the bypass. The procedure number obtained by adding the number of procedures that have been performed is compared with the procedure number of the procedure corresponding to the current procedure after jumping in the procedure data read by the refueling procedure data reading means. A procedure number matching / mismatch monitoring means for monitoring the match / mismatch between the two, a procedure number of a current procedure after jumping by the bypass means,
An alarm issuance that compares the procedure number of the procedure corresponding to the current procedure after jumping in the procedure data read by the refueling procedure data reading means, and issues an alarm when there is a mismatch. Means.

[0030] The invention described in claim 2 is a method in which the continuation of the operation based on the operation procedure becomes impossible for some reason.
Alternatively, when temporarily changing the operation procedure, a bypass action is performed to exclude the scheduled procedure from being monitored before the operation deviating from the scheduled procedure, and the bypass operation is performed for a plurality of procedures. In this case, the position of the refueling machine and the operation start and completion signals indicated by the next procedure can be continuously monitored to notify that the procedure after bypass deviates from the previously planned procedure. it can.

According to a third aspect of the present invention, there is provided a core inspection work monitoring system at the time of regular inspection according to the first or second aspect of the present invention, wherein the fuel exchange control device falls out of automatic operation. An alarm unit that outputs an alarm when an operation mode / exclusion of the control device occurs; a fuel number and a procedure target position in the refueling procedure data immediately before the operation mode / exclusion occurs; and the target setting data reading unit. A shift amount calculating means for calculating a difference from a current position to be read as needed as a shift amount, and a shift amount recording means for recording the calculated shift amount as an exclusion occurrence factor at this time.

According to a third aspect of the present invention, there is provided a refueling system for stopping all monitoring among the operation mode monitoring of the refueling control device used in the basic determination of whether or not the present device performs core work monitoring. When the control device operation / exclusion mode is set, a chime for notifying the exclusion is sounded, and a deviation amount between the exclusion occurrence position of the fuel exchange control device as the exclusion occurrence factor and the target position at that time is recorded together with the exclusion message. be able to.

According to the fourth aspect of the present invention, there is provided the regular inspection core work monitoring apparatus according to any one of the first to third aspects, wherein the manual operation is performed in an operation mode other than the automatic mode.
After performing the procedure bypassing the procedure based on the procedure data read by the refueling procedure data reading means and proceeding to the next procedure, and then performing the bypass procedure retrospectively, monitoring the core work at regular inspection. A bypass procedure number searching means for searching a procedure list monitored by the apparatus for a bypass procedure number having a fuel number corresponding to the fuel number in the start / completion procedure signal sent for retroactive operation by the refueling control device; And a procedure start / completion recording means for overwriting and recording the actual procedure start / completion time on the procedure list with respect to the procedure record of the bypassed procedure number obtained by the search.

According to a fourth aspect of the present invention, when a procedure which is not performed in a scheduled order by bypassing a procedure is executed in a post-procedure, conventionally, the bypassed procedure corresponds to an operation corresponding to the procedure in the post-process. The date and time of execution was not recorded even if was executed, and for the refueling work to be performed in the post-process, search for the order in which the replacement work corresponds, and record the execution of the matching procedure The operation start / completion date and time can be overwritten on the information list.

According to a fifth aspect of the present invention, in the regular inspection core work monitoring device, the procedure selected by the refueling control device is a control rod operation procedure. Then, the position of the control rod in the longitudinal direction sent from the control rod operation monitoring device in real time is compared with the position of the complete insertion or the complete removal of the control rod, and the complete insertion or the complete removal of the control rod is completed. Comparison determination means for determining whether or not the control rod has been completely inserted or completely removed as a result of the comparison determination; and time detection means for detecting the time when the control rod has been completely removed. A procedure search means for searching a sequence number of the control rod during operation or at completion of the operation of the control rod at the time based on the in-core arrangement coordinates of the control rod to be inserted, and Based on search results Procedure start / end time recording means for additionally recording the procedure start and completion times in the procedure list each time as the procedure execution record of the procedure number.

According to a fifth aspect of the present invention, the start / completion date and time of the control rod operation in the start / completion date record of the core work procedure managed and output by the refueling control device are recorded by the control rod operation monitoring device. Automatically generated from the position (pos) of the control rod in the longitudinal direction.
In the case of 8 pos, it is considered that all of the control rods have been pulled out, and all the insertion times and the total withdrawal times of the control rods are generated, and these are recorded as the control rod operation procedure start / completion times which are the start / completion times of the control rod operation procedures. it can.

According to a sixth aspect of the present invention, in the regular inspection core work monitoring device according to the first to fifth aspects, the same screen as the monitoring information displayed on the regular inspection core monitoring device is displayed. Duplicate information selecting means for duplicating at any time and selecting necessary information for monitoring, transmitting means for transmitting screen information to a display device near a refueling control device at a remote position, and core work monitoring device at regular inspection An alarm information display means for displaying information necessary for monitoring in the same screen information as the main body is provided.

According to the present invention, when it is necessary to browse the information provided by the present apparatus in a place different from the power plant and the central control operation room in which the present apparatus is installed, the screen information can be accurately displayed. The screen can be automatically transmitted to a general-purpose computer so that it can be obtained in the operation room of the refueling control device, and updated in real time to always provide the latest information to a remote location.

According to a seventh aspect of the present invention, there is provided the periodic inspection core work monitoring device according to any one of the first to sixth aspects, wherein the fuel and control recorded in the fuel loading and control rod operation procedure list are provided. Text format conversion means for converting bar numbers, procedure start time information, procedure completion time information, and the like into a text format capable of totaling work time data, and text data for outputting and recording the converted text format data to an external storage medium Recording means.

According to a seventh aspect of the present invention, the fuel loading and control rod operation procedure list information including the execution date and time and the start completion time of the control rod operation procedure after the bypass procedure is
It can be converted into a text format that can be taken out from a general computer, and the required time of each procedure can be calculated and output from the results of the procedure progress. As a result, the required time required for each fuel loading can be accurately grasped, so that effective operation management can be performed.

According to an eighth aspect of the present invention, there is provided the regular inspection core work monitoring device according to any one of the first to seventh aspects, wherein the fuel exchange control device performs a fuel handling operation on the core. Stop position reading means for reading the stop position in the direction of the bridge and trolley from the refueling control device, and a hoist safe entry allowable range is set beforehand so that the hoist tip vertically mounted on the refueling machine does not contact the core lattice wall. Approach allowable range setting means, an allowable range determining means for determining whether or not the hoist tip is within the allowable range, a means for outputting an alarm when the hoist tip deviates from the allowable range, and an alarm result. Alarm result recording means for recording as a message history.

According to an eighth aspect of the present invention, when the fuel exchange control device performs a fuel handling operation on the reactor core, the tip of a hoist vertically elastically attached to the fuel exchange control device holds the fuel. The hoist is lowered in the landing direction, or the refueling control device monitors the current position of the fuel gripper within the allowable range of the hoist so that the hoist does not contact the core lattice wall even if the hoist is raised, An alarm is output when the value falls outside the allowable range. Thereby, it is possible to prevent a problem that the fuel gripping part runs over the lattice end of the core.

According to a ninth aspect of the present invention, there is provided a method for monitoring core work at the time of regular inspection, wherein the refueling control device inserts nuclear fuel and control rods into the core when performing a fuel exchange operation within the reactor core at the time of regular inspection. In a regular inspection core work monitoring method for monitoring a loading or unloading operation, monitoring is performed by using the regular inspection core work monitoring device according to any one of claims 1 to 8.

According to the ninth aspect of the present invention, even when the refueling control device is set to a mode other than the automatic mode, it is possible to monitor the correctness of the refueling control device information, which was conventionally impossible, and to perform the procedure during bypass. Can be notified of whether or not it deviates from the scheduled procedure, and when the refueling control device falls out of automatic operation, early notification and exclusion mode occurrence factors can be recorded, which could not be conventionally recorded The execution date and time can be recorded even in the procedure after the bypass, and the start and completion time of the control rod operation of the control rod operation monitoring device, which was impossible in the past, can be recorded, updated in real time and always provide the latest information to remote locations It is possible to accurately grasp the required time required for each fuel loading, perform effective operation management, and prevent the fuel gripping portion from climbing on the grid end of the core.

[0045]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of the functional means of a regular inspection core work monitoring apparatus 1A according to an embodiment of the present invention. The core operation monitoring device 1A at regular inspection inputs monitoring data indicating the fuel loading state in the core from a fuel exchange control device 3 for controlling the refueling machine 2 and a control rod operation monitoring for controlling and monitoring a control rod driving device 4. These monitoring data are taken into the core operation monitoring device 1A at regular inspection by the signal connection means 6 which also receives a process signal indicating the control rod driving state in the core from the device 5.

The fetched monitoring data and process signals are distributed by the monitoring data reading means 7 into data from the fuel exchange control device and data from the control rod operation monitoring device, and are stored in the monitoring data storage means 8.

Further, the monitoring means 9 for monitoring the data obtained by the monitoring data reading means 7 based on a predetermined monitoring logic.
When the abnormality is detected by monitoring, the alarm means 10
Generates an alarm.

Further, the captured data and the monitoring result are displayed on the screen display device 12 by the screen control means 11, and a screen for the remote display terminal 13 installed at a remote position is created by the screen duplication means 14, This is transmitted to the remote display terminal.

Here, the refueling machine 2 moves between the core and the fuel pool, and moves mainly by grasping fuel.
The refueling control device 3 stores all the fuel transfer procedures in advance in the form of procedure data shown in FIG. 2, and controls the refueling machine 2 according to the procedure. FIG. 2 is an example of procedure data relating to fuel removal.

Further, the refueling control device 3 grasps the positions of all the fuels during the fuel movement in the form of data shown in FIGS. 4 and 5, and uses the data in the core operation monitoring device 1A at regular inspection. Output to

FIG. 4 shows a state in which fuel is loaded in the reactor core.
Here is an example. All fuel numbers are displayed in the form of A / B, where A represents the top four characters of the fuel number, eg FUEL, DB
G, hit a blank. Where FUEL is fuel and DBG is Doub
In Le Braids Guide, it means a support material that suppresses control rod runout. B represents the lower four characters of the fuel number, for example, 0001, 0754, 0000, etc.

FIG. 5 shows an example of a state in which fuel is loaded in the pool. All fuel numbers are A, as in FIG.
/ B.

First, an actual situation in which the operation of the fuel exchange control device is monitored in a mode other than the automatic mode will be described.

The core operation monitoring device 1A at the regular inspection reads the start signal of the procedure for each procedure number from the refueling control unit with the monitoring data reading means 7 as the core operation procedure progresses during the core operation. Is stored in the monitoring data storage means 8, and at the same time, the monitoring means 9 extracts the target position included in the start signal.

On the other hand, the procedure data as shown in FIG. 2 previously taken in from the refueling control device 3 is read from the monitoring data storage means 8, and the monitoring means 9 corresponds to the procedure number included in the start signal of the procedure data. The procedure contents are separated, and the operation target position described in the procedure contents is extracted.

The two target positions selected by the above processing are collated, and it is monitored whether there is an error in the target setting performed on the refueling machine side.

FIG. 6 shows a logic circuit for the monitoring.
Fig. 6 shows an example of monitoring the procedure for removing fuel.
For the BG and the control rod, the refueling control device 3
Each of the grasp coordinates, the talk coordinates and the control rod coordinates transmitted before each movement of the DBG and the control rod, and the next procedure following the normally completed procedure which has been previously read into the core operation monitoring device 1A at the regular inspection. Compare the grabbed coordinates with the uncoordinated coordinates,
It shows a logical flow for determining whether monitoring is normal or abnormal.

Referring to FIG. 6 in more detail, the regular inspection core work monitoring apparatus 1A determines whether the refueling machine mode is automatic or non-automatic by the block 1 and the fuel transmitted from the refueling control apparatus 3 In block 2, the position where the fuel is held or the position where the fuel is removed from the exchange is compared with the position where the fuel is gripped or the position where the fuel is released in the procedure data stored in the monitoring data storage means 8.

Similarly, for the control rods, the control rod coordinates in the control rod numbers transmitted from the control rod operation monitoring device 5 and the operation control rods in the procedure data stored in the monitoring data storage means 8 Block 3 of control rod coordinates of number
Is collated.

Based on the information selected as described above, if monitoring is normal, block 4 is activated, and if monitoring is abnormal, block 5 is activated. As a result, the monitoring means 9 determines whether or not the procedure to be operated by the fuel exchange control device 3 matches the planned procedure.

If the result of determination is that they do not match, the alarm means
Sends an alarm with 10.

In summary, FIG. 7 shows a flow that can monitor the operation of the refueling control device even in a mode other than the automatic mode.
Shown in

The control rod support DBG (Double Braids
Guide) is shown in Figure 8. In FIG. 8, 8-a is
2 shows a normal combination of a fuel assembly and a control rod. Four fuel assemblies are set for one cross-shaped control rod. The control rod is supported by the fuel assembly, and if the fuel assembly is only two or one on one side, it cannot be supported and falls. 8-b is when one fuel assembly is pulled out, 8-c is when two fuel assemblies are pulled out, and 8-d is DBG for supporting the control rod when three fuel assemblies are pulled out. If you insert
When three fuel assemblies are pulled out, 8-f is when all four fuel assemblies are pulled out, 8-g is when further control rods are pulled out, 8
-h indicates the case where DBG is also omitted. As described above, by using the DBG in combination, it is possible to keep the control rod constantly supported in taking out the fuel assembly.

Next, an actual situation in which the procedure after the bypass deviates from the scheduled procedure will be described.

When the continuation of the operation based on the operation procedure becomes impossible for some reason, or when the operation procedure is temporarily changed, before the operation deviating from the planned procedure, the scheduled procedure is performed. Perform a bypass action that excludes from the monitoring target, even if this bypass operation is performed for a plurality of procedures, the position of the refueling machine and the operation start / completion signal included in the procedure shown below are continuously Monitor
Notification is possible if the procedure after bypass deviates from the planned procedure.

Specifically, in FIG. 6, if the position coordinates of the procedure number sent from the refueling control device 3 are compared with the position coordinates of the procedure number following the bypassed procedure, and if the block 5 operates, The procedure after the bypass deviates from the previously planned procedure, and an alarm can be generated.

Summarizing the above, FIG. 9 shows a flow for issuing a notification when the procedure after bypass deviates from the scheduled procedure.

Next, the actual state of recording the notification of the occurrence of the exclusion and the exclusion factor will be described.

Among the operation modes of the refueling control device used for the basic determination as to whether or not the present device performs the core work, the operation of the refueling control device for stopping all monitoring is performed.
The case where the exclusion mode is set will be described.

When the refueling control device falls out of automatic operation, a chime is sounded and an alarm is issued when an operation mode or exclusion of the refueling control device occurs, and a fuel change immediately before the operation mode or exclusion occurs. The deviation (mm) between the fuel number in the procedure data, the procedure target position, and the current position read by the target setting data reading means as needed is recorded as an exclusion occurrence factor at this time.

More specifically, the core work monitoring device 1A at the time of regular inspection
The monitoring means 9 also monitors whether the operation mode of the refueling control device is excluded or not at the same time by the monitoring means 9, and determines the refueling control device mode, the cause of occurrence of the exclusion control and the occurrence time, which affect the core work plan. It is recorded in the monitoring data storage means 8.

The records at the time of the regular inspection work can be used as management report data of the regular inspection work by executing a process of calculating the required time of the core work.

Summarizing the above, FIG. 10 shows a flow for recording a notice of occurrence of exclusion and recording an exclusion factor.

Next, an actual situation will be described in which the post-bypass procedure which could not be recorded conventionally can record the execution date and time when it is executed retroactively.

When the manual operation is performed in the manual operation mode, the procedure is skipped after skipping the procedure based on the procedure data read by the refueling procedure data reading means and proceeding to the next procedure. When executing the procedure, the core number and fuel position in the bypass procedure completion procedure signal sent by the refueling control unit at the time of the procedure Then, the bypassed procedure number is searched, and the actual procedure completion time is overwritten and recorded in the procedure list with respect to the record of the bypassed procedure obtained by the search.

That is, by receiving a signal indicating the start and completion of an arbitrary operation other than the automatic mode from the refueling control device 3, the actual procedure starts and completes the searched procedure, and the monitoring data storage means 8 is overwritten again. I'm going to record it. As a result, the execution date and time can be recorded even in the post-bypass procedure which has not been conventionally possible.

Summarizing the above, FIG. 11 shows a flow for recording the execution time of the procedure after being bypassed.

Next, in the control rod monitoring operation,
This shows the actual state of recording the completion time.

When the procedure selected by the refueling control device is the control rod operation procedure, the control rod operation monitoring device sends the control rod operation information in real time in the longitudinal direction of the control rod and completes the insertion or complete removal of the control rod. Comparing with the position of completion, determine whether or not the complete insertion of the control rod or complete withdrawal, and from the result of the comparison determination, detect the time when the complete insertion or complete withdrawal of the control rod has been detected, Based on the coordinates of the control rods in the core taken at the same time as the position information in the longitudinal direction of the control rods, the control rods that are currently operating or have completed the operation match the sequence number of the core operation monitoring device at the regular inspection based on the coordinates A search is made, and each time, as a procedure execution record of the procedure number obtained based on the search result, it is additionally recorded in the procedure list.

The start / completion date of the control rod operation in the start / completion date / time record of the core work procedure managed / output by the refueling control device is controlled by the control rod operation monitoring device in the control rod longitudinal direction. Automatically generated from the rod tip position (pos)
In the case of 00 pos, respectively, it is assumed that the control rod is fully inserted, and in the case of 48 pos, it is considered that all the control rods are to be extracted, and all the insertion times and all the removal times of the control rods are generated.

Thus, the control rod operation start / completion time of the control rod operation monitoring device, which has been impossible in the past, can be recorded.

Summarizing the above, FIG. 12 shows a flow for recording the start and completion times in the control rod monitoring operation.

Next, an actual situation in which monitoring information is displayed in a remote place in real time will be described.

The screen showing the core state including various monitoring results is always copied only by the screen duplicating means 14 for display at a remote location, and is transmitted to the remote display device 13 by transmission. . Therefore, it is not necessary for the computer on the remote display terminal side to perform data storage and data monitoring processing, and it is possible to minimize an increase in the computer load on the remote display terminal side.

As a connection method for screen duplication, there are two examples shown in FIGS. 13A and 13B. FIG. 13-a has the same configuration as that shown in FIG. That is, in the core operation monitoring device 1A at the regular inspection, among the huge data screens created by the screen control means 11 through the interactive operation, only the monitoring information desired by the site is organized by the screen duplication means 13 and the screen information transmission is performed. Processing unit 15
To a transmission signal for long distances exceeding 100 m,
The data is sent to the remote display terminal 14 via an AN cable or an infrared LAN, and is monitored.

FIG. 13B is different from FIG. 13A in that the screen creation procedure is different from that shown in FIG. 13A and is directly taken out from the monitoring data storage means 8 by the second screen control means 11 ′ to create a screen of information to be viewed for monitoring. Do. Thereafter, it is sent to the remote display terminal 14 by the same connection method as in FIG.

As a result, the power station in which the device is installed
When it is necessary to browse the information provided by the present apparatus in a place such as the fuel exchange control device operation room different from the central control operation room, the information can be updated in real time and always provide the latest information.

Next, a description will be given of an actual situation in which data can be converted into a text format and data can be processed by an external computer.

The data such as the fuel and control rod numbers, the procedure start time, and the procedure completion time recorded in the fuel loading and control rod operation procedure list are converted into text format, and the converted text data is transferred to an external computer. Output and record required work time.

Items for which data could not be obtained in the past include fuel loading and control rod operation procedure list information such as the execution date and time in the post-step of the bypass procedure and the start and completion times of the control rod operation procedure. Is converted to a text format that can be extracted from a general computer, and the time required for each step is calculated and output. Using this result, the operation results of each fuel loading can be grasped and effective operation management can be performed.

Next, the actual situation of preventing the tip of the hoist of the refueling machine from riding on the end of the core lattice when the refueling control device is in a mode other than the automatic mode will be described.

When the refueling apparatus performs a fuel handling operation on the reactor core, the tip of the hoist vertically extendable and retractably mounted on the refueling control apparatus winds the hoist in the landing direction while holding the fuel. In order to prevent contact with the core grid wall even when the fuel roll is lowered, monitor that the current position of the fuel gripper is positioned within the permissible range, and issue an alarm when it is out of the permissible range. Need to output.

More specifically, as shown in FIG. 14, the current position in the bridge and trolley directions of the refueling machine including the position of the fuel gripping portion of the refueling machine 2 is set to the target immediately before the automatic exclusion of the refueling machine mode. A rectangular monitoring range of + -10 mm from the position is provided, and a coordinate comparison between the current position and the previous rectangular monitoring range is executed by the monitoring means 9, and when exceeding the rectangular range, an alarm is issued from the alarm means 10. Thus, in a mode other than the automatic refueling control device, it is possible to prevent the tip of the refueling machine from climbing over the upper end of the core lattice due to an incorrect setting of the fuel operation target position during movement in the core.

Summarizing the above, FIG. 15 shows a flow for preventing the tip of the hoist of the fuel exchanger from running over the core lattice.

[0096]

As described above, by using the core operation monitoring device at regular inspection according to the present invention, the operation of the refueling control device can be performed in a mode other than the automatic mode by using the position monitoring means at the time of mode change. Can be monitored. Also, by using the procedure number monitoring means at the time of bypass, it is possible to notify when the procedure being bypassed deviates from the scheduled procedure. In addition, it is possible to notify the occurrence of the exclusion and record the exclusion factor by using the alarm at the time of the occurrence of the exclusion and the means for recording the cause. Further, the execution time of the post-bypass procedure can be recorded by using a means for recording the progress at the time of the retroactive operation after the bypass. Further, the start / completion time in the control rod monitoring work can be recorded by using the operation start / completion time recording means of the control rod work. In addition, the monitoring information can be displayed in a remote location in real time by using a means for monitoring the monitoring information at a remote location. Further, the data can be converted into a text format and the data can be processed by using means for externally processing the monitoring data. Also, the means for avoiding contact between the hoist and the core structure can prevent the leading end of the hoist of the fuel line exchanger from running over the lattice edge. Further, an effective regular inspection core work monitoring method can be provided by using the regular inspection core work monitoring device.

As described above, in addition to the conventional automatic mode procedure monitoring, even in modes other than the automatic mode, the core work is comprehensively monitored, such as refueling machine position information, control rod positions, operation procedure monitoring, and the like. Therefore, the safety of core work can be ensured. Further, as a result of the accident prevention, the time delay of the fuel loading operation can be eliminated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline of a regular inspection core work monitoring apparatus according to an embodiment of the present invention.

FIG. 2 is a diagram showing an example of procedure data in the case of fuel removal.

FIG. 3 is a diagram showing a relationship between a core and a pool.

FIG. 4 is a diagram showing a partial example of a core loading state.

FIG. 5 is a diagram showing a partial example of a pool loading state.

FIG. 6 is a logic flow diagram of procedure monitoring.

FIG. 7 is a flowchart for monitoring the operation of the refueling control device even in a mode other than the automatic mode.

FIG. 8 is a diagram showing how to use a DBG (Double Braids Guide).

FIG. 9 is a flowchart of a notification when a procedure after bypass deviates from a scheduled procedure.

FIG. 10 is a flowchart for recording a notification of occurrence of exclusion and recording an exclusion factor.

FIG. 11 is a flowchart for recording an execution time of a procedure after being bypassed.

FIG. 12 is a flowchart for recording a start / completion time in a control rod monitoring operation.

FIG. 13 is a block diagram for displaying monitoring information in a remote place in real time.

FIG. 14 is a diagram showing an alarm area other than a target address.

FIG. 15 is a flowchart for preventing the tip of the hoist of the refueling machine from running over the grid.

[Explanation of symbols]

 1A Regular inspection core work monitoring device 2 Refueling machine 3 Fuel exchange control device 4 Control rod drive device 5 Control rod operation monitoring device 6 Signal exchange means 7 Monitoring data reading means 8 Monitoring data storage means 9 Monitoring means 10 Alarm means 11 Screen control Means 12 Screen display means 13 Screen duplication means 14 Remote display means 15 Screen information transmission processing unit 16 RGB cable 17 LAN cable 21 Core 22 Pool 23 Canal 24 Bridge 25 Trolley 26 Fuel assembly 27 Control rod 28 DBG 29 Trolley moving position 30 Bridge Movement position

Continued on the front page F term (reference) 2G075 BA17 BA18 CA08 CA25 CA38 CA39 FA12 FB04 FB07 FB08 FB10 FC03 FD04 FD07 GA15 GA17 GA24 GA33

Claims (9)

[Claims] When fuel is exchanged in the reactor core at the time of regular inspection, data is exchanged between a fuel exchange control device and a control rod operation monitoring device, and the fuel exchange control device injects water. In the regular inspection core work monitoring device for monitoring the loading and unloading of nuclear fuel and control rods from the finished core, data is exchanged with the refueling control device and the control rod operation monitoring device. Signal exchange means for detecting at least each operation mode including automatic and non-automatic modes, and refueling procedure data including a refueling procedure number created in advance for refueling and taken in at system startup unless the contents are changed Means for reading fuel exchange procedure data for reading the fuel number and procedure target position for reading the fuel number and procedure target position contained in the fuel exchange procedure data Means, target setting data reading means for taking in a target position set before the fuel is moved by the fuel exchange control device each time, and the fuel number / procedure target when the fuel exchange control device is in an operation mode other than the automatic mode. Procedure target position / target position monitoring for comparing the procedure target position of the fuel of the corresponding fuel number read by the position reading means with the target position read by the target setting data reading means and monitoring the coincidence / mismatch between the two. Means, when the procedure target position and the target position do not match,
A monitoring system for core work at the time of regular inspection, comprising: an alarm generating means for notifying that the target position set by the refueling control device is incorrect. 2. The regular inspection core work monitoring device according to claim 1, wherein when performing manual operation in an operation mode other than automatic, a procedure based on procedure data read by the refueling procedure data reading means is skipped. Refueling procedure bypass means permitting the process to proceed to the next procedure, and the current procedure after jumping by the refueling procedure bypass means corresponds to any procedure read by the refueling procedure data reading means. A procedure search means for searching for, a procedure number obtained by adding the number of bypassed procedures to the procedure number of the procedure before bypass, and after jumping in the procedure data read by the refueling procedure data reading means. A procedure number match / mismatch monitoring means for comparing a procedure number of a procedure determined to be equivalent to the current procedure of the two and monitoring a match / mismatch between the two, and the bypass means The procedure number of the current procedure after jumping, and the procedure number of the procedure corresponding to the current procedure after jumping in the procedure data read by the refueling procedure data reading means. And a warning generating means for generating a warning when there is a discrepancy between the two. 3. The regular inspection core work monitoring device according to claim 1, wherein the refueling control device is deviated from the automatic operation, and an alarm is generated when an operation mode or exclusion of the refueling control device occurs. And a difference between a fuel number and a procedure target position in the refueling procedure data immediately before the operation mode / exclusion occurrence and a current position read by the target setting data reading means as needed. And a deviation amount recording means for recording the calculated deviation amount as an exclusion occurrence factor at this time. 4. A routine based on the procedure data read by the refueling procedure data reading means, when the manual operation is performed in an operation mode other than the automatic operation mode, in the core inspection monitoring apparatus at regular inspection according to claim 1. When performing the bypassed procedure after performing the bypass procedure after performing the bypass procedure, the refueling control apparatus is included in the list of procedures monitored by the core operation monitoring device at the regular inspection. A bypass procedure number search means for searching for a bypass procedure number having a fuel number corresponding to the fuel number in the start / completion procedure signal sent for operation; and a procedure record of the bypass executed procedure number obtained by the search. And a procedure start / completion time recording means for overwriting and recording the actual procedure start / completion time on the procedure list. 5. The core operation monitoring device at regular inspection according to claim 1, wherein when the procedure selected by the refueling control device is a control rod operation procedure, the procedure is transmitted in real time from the control rod operation monitoring device. Comparison determination means for comparing the incoming position of the control rod in the longitudinal direction with the position of complete insertion or complete removal of the control rod to determine whether or not complete insertion or complete removal of the control rod; and As a result of the determination, time detecting means for detecting the time when the control rod has been completely inserted or completely removed, and based on the arrangement coordinates in the core of the control rod to be taken in simultaneously with the longitudinal position of the control rod. A procedure search means for searching for the order of the procedure of the core operation monitoring device during or at the time of operation of the control rod which has been operated or completed, and a procedure execution record of the procedure number obtained based on the search result Start the procedure as Each time the fine completion time, periodic inspection during core operations monitoring apparatus characterized by comprising a procedure start and completion time recording means additionally records in the procedure list. 6. The regular inspection core work monitoring device according to claim 1, wherein the same screen as the monitoring information displayed on the regular inspection core monitoring device is duplicated at any time, and information necessary for monitoring is selected. Duplicate information selection means, transmission means for transmitting screen information to a remote display unit near the refueling control unit, and necessary monitoring for the same screen information as the core work monitoring unit at regular inspection And a monitoring information display means for displaying critical information. 7. The regular core inspection work monitoring device according to claim 1, wherein the fuel and control rod numbers, the procedure start time information, the procedure completion time information, etc. recorded in the fuel loading and control rod operation procedure list. Core work during regular inspection, comprising: means for converting the data into a text format capable of collecting work time data; and text data recording means for outputting and recording the converted text data to an external storage medium. Monitoring device. 8. The fuel inspection control device according to claim 1, wherein the fuel exchange control device determines a stop position in a bridge and trolley direction when the fuel exchange control device performs a fuel handling operation on the reactor core. From a stop position reading means for reading from a, a hoist tip vertically mounted on the refueling machine, an approach allowable range setting means for setting a hoist safe approach allowable range in advance so as not to contact the core lattice wall surface, An allowable range determining means for determining whether the height is within the allowable range, a means for outputting an alarm when the tip of the hoist deviates from the allowable range, and an alarm result recording means for recording an alarm result as a message history. A regular inspection core work monitoring device. 9. A periodic inspection core work monitor in which a refueling control unit monitors the loading or unloading of nuclear fuel and control rods from the reactor core during refueling work in the reactor core during the periodic inspection. 9. A method for monitoring core work during regular inspection, wherein the monitoring is performed using the apparatus for monitoring core work during regular inspection according to any one of claims 1 to 8.