JP3568712B2 - Scrum timing recorder device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a scram timing recorder device that verifies the soundness of a control rod scram operation in a nuclear reactor in a nuclear power plant.
[0002]
[Prior art]
FIG. 20 is a configuration diagram showing a conventional scrum timing recorder device, in which control rods L1 to L205 are arranged in a reactor NV to adjust the power of the reactor, and the control rods L1 to L205 are Driven by the driving devices D1 to D205 in accordance with the respective drive amounts, the respective control rod position signals are output by the control rod position detection device 1. The scram signal generator 2 outputs a scram signal which is an event trigger signal for inserting all the control rods L1 to L205 for emergency stop of the reactor output.
[0003]
The scrum timing recorder 100 is composed of an electromagnetic oscilloscope or the like, and upon receiving a scrum signal, inputs and records each control rod position signal from a control rod position detecting device (specifically, a control rod stroke% position detecting device) 1.
[0004]
FIG. 21 shows an output waveform of a control rod position signal when one control rod recorded in the scrum timing recorder 100 is scrammed from the full withdrawal position. In the control rod position detection device 1 on the left side facing the reactor NV, , 0%, 40%, 60%, and 100%, respectively, and these are output as stroke signals as shown on the right.
[0005]
When a scram signal is issued from the scram signal generator 2, the control rods are inserted at 0, 10, 40, 60, 100% and all the insertion positions corresponding to the positions where the control rods are inserted toward the upper part of the core from the generation of the scram. Is output as a pulse signal as shown in FIG.
[0006]
Here, the FI to F3 signals are signals for detecting whether or not the control rod is correctly held at all the insertion positions when scrum is performed. In the scrum generation, the control rod performs scram operation, but is pushed up from the control rod drive mechanism for about 30 seconds at the top of the core as shown in FIG. 21, and then the control rod drive mechanism stops being pushed up. Settles at all insertion positions due to its own weight. The F2 signal also serves as 100% of the stroke signal.
[0007]
These generated signals are extracted as control rod position signals, recorded on an electromagnetic oscilloscope, scram time is sampled, and the soundness of control rod drive can be evaluated. Note that the scram time can be measured by collecting data for 10 seconds from the occurrence of the scrum.
[0008]
[Problems to be solved by the invention]
However, the above-described scrum timing recorder 100 has various problems as follows.
[0009]
That is, the above-described pulse signal group is a simple contact signal accompanied by a mechanical operation when the magnet M passes through the switch SW of the contact CON as shown in FIG. 22, or a waveform of a correct pulse signal is not output. There is.
[0010]
First, as shown in FIG. 23, there is a case where chattering is easily generated in the output waveform, which hinders accurate calculation of the scrum time.
[0011]
Second, due to the timing shift, in the normal scrum operation, as shown in the upper part of FIG. 21 or FIG. 24, the entire insertion position of the control rod is shown 10 seconds after the start of the scrum, but the control rod operation is adjusted. At the stage, as shown in the lower part of FIG. 25, the control rod position may indicate the entire insertion position within 10 seconds after the occurrence of the scrum. In this case, the number of pulses is abnormal, and the scrum time cannot be calculated accurately.
[0012]
Thirdly, this is due to a signal crack of the pulse signal from the switch SW shown in FIG. When the pulse-like signal is split into three signals as shown in the upper part of FIG. 26 and output, there may be three pulse-like signals as shown in the lower part of FIG. In this case, a fine adjustment operation for lowering the threshold value according to the environment in the furnace is performed, but this operation requires a great deal of trouble.
[0013]
Fourth, the extraction of measurement control rods involves the operator searching for a signal line from the control rod coordinates and connecting the electromagnetic oscilloscope to the signal line, so that a connection error or the like may occur.
[0014]
Fifth, it relates to the display of the operation state of the single scrum SW, and the designation of the control rod for performing the scrum operation is performed by changing the SW from the ON state to the OFF state for each control rod from the scrum signal generator 2. At this time, after confirming that the SWs of all the control rods are in the normal OFF state, it is necessary to specify the next control rod scrum, which is an extremely difficult operation for the operator.
[0015]
Therefore, an object of the present invention is to provide a scrum timing recorder device that can accurately measure a scrum time and verify the soundness of a control rod scram operation.
[0016]
[Means for Solving the Problems]
The invention according to claim 1 is a control rod stroke% position detecting device which detects and outputs each control rod stroke% position signal representing each stroke% position of a plurality of control rods disposed in a nuclear reactor, and the control rod. And a scram signal generator for generating a scram signal for urgently inserting the control rod. When the control rod is inserted by the scram signal, a scrum time is collected from the control rod stroke% position signal, and a scram operation of the control rod is performed. In a scrum timing recorder device for verifying soundness by a scrum time, a process input means for taking scan data of each stroke% position obtained by scanning each control rod stroke% position signal by inputting the scrum signal; The scan data captured by the process input means is changed in a time series over a predetermined time. Measurement processing means for extracting data and storing the data in the scan data group area; performing signal analysis processing on the scan data stored in the scan data group area by the measurement processing means; and storing the obtained analysis data in the analysis data group area. Signal analysis processing means, wherein the signal analysis processing means uses the scan data extracted in the scan data group area as relative time data from the occurrence of a scrum, and a predetermined time when the scan data has a chattering waveform. And a chattering mask processing means for storing the relative time data from the occurrence of the scrum as a normal pulse signal in the chattering mask data group area as a normal pulse-like signal, and a pulse generated immediately before the detection position of 100% insertion of the control rod stroke. The signal change that occurs next is indicated by the control rod stroke 100. Regarded as an insertion position detection signal, and the timing deviation data processing means for storing the relative time data to the timing deviation data group area, if there is the timing error data group signal cracking saved relative time data in the area, a predetermined signal cracking Signal cracking data processing means for performing a correction process and storing only normal relative time data in the analysis data group area; and referring to the relative time data stored in the analysis data group area to control the scram operation of the control rod. It is characterized by verifying soundness.
[0017]
According to a second aspect of the present invention, in the scrum timing recorder according to the first aspect, control rod number extracting means for extracting a control rod number by referring to a control rod coordinate table for the analysis data stored in the analysis data group area. And a form processing means for calculating a scrum time for each control rod number, processing the data into a predetermined form, and outputting the processed form to an output device.
[0018]
According to a third aspect of the present invention, in the scrum timing recorder according to the first aspect, a scrum signal generation display unit for displaying and notifying that a scram operation is ready when a scrum operation is performed by operator intervention is provided. It is characterized by doing.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
FIG. 1 is a configuration diagram of a scrum timing recorder device showing a first embodiment of the present invention.
[0024]
In the scrum timing recorder, a control rod position detecting device (specifically, a control rod stroke% position detecting device) 1 and a scrum signal generating device 2 are connected to a scrum timing recorder 101, and the scrum timing recorder 101 is a process input means. 10, a measurement processing unit 11, a timer 11a, a signal analysis processing unit 12, a scan data group area 13, and an analysis data group area 14.
[0025]
Here, the measurement processing unit 11 stores the scan data captured by the process input unit 10 in the scan data group area 13 in a time series for a predetermined time. The signal analysis processing means 12 extracts the scan data stored in the scan data group area 13 by the measurement processing means 11 and performs signal analysis processing so that a normal pulse signal is obtained. Save to The scan data group area 13 stores scan data. The analysis data group area 14 stores analysis data obtained by performing signal analysis processing.
[0026]
FIG. 2 shows details of the signal analysis processing means 12 shown in FIG. 1. The signal analysis processing means 12 includes a chattering mask processing means 15, a timing shift data processing means 16, a signal break data processing means 17, and a chattering It comprises a mask data group area 18 and a timing shift data group area 19.
[0027]
Here, the chattering mask processing means 15 performs a predetermined correction process when there is chattering in the signal waveform of the scan data to obtain a normal pulse signal. When there is a timing deviation in the signal waveform of the scan data, the timing deviation data processing means 16 performs a predetermined timing deviation correction process to obtain a normal pulse signal. The signal cracking data processing means 17 performs a predetermined signal cracking correction process when a signal waveform of the scan data has a signal crack, thereby obtaining a normal pulse signal.
[0028]
Next, the operation of the first embodiment will be described with reference to the processing procedure shown in FIG.
[0029]
First, the control rod position signal output from the control rod position detecting device 1 and the ON scrum signal output from the scrum signal generating device 2 or the process input means 10 are input to the process input means 10, and this input data is always time-sequentially shown in FIG. (S1).
[0030]
The scan data group area 13 shown in FIG. 4 stores one scan data group (stroke indicating the scrum signal and the control rod position, F2 and F3 indicating the entire insertion position) of the process input means 10 for the time required for the scrum operation or more. Of 10 seconds and 1 msec cycle in a time series from the top to the bottom. Further, the scan data group area 13 is a circular buffer that returns to the top of the scan data group area 13 when the scan data group reaches the end of the area. The state of the scan data group area 13 is monitored by the measurement processing unit 11.
[0031]
When the scrum signal from the scrum signal generator 2 changes from ON to OFF, the measurement processing means 11 starts the timer 11a for measuring the elapse of the scrum measurement time from 0 seconds. If the timer 11a indicates 10 seconds, the measurement is started. The processing unit 11 stops updating the data to the scan data group area 13 (S2 to S4). As shown in FIG. 5, the data sample at the time of this stop is stored as “0” and “1” for all the control rod position signals by decomposing one scan data group of 1 msec. The following analysis processing is performed according to the internal processing of the signal analysis processing means 12 using the stored scan data group.
[0032]
First, the chattering mask processing means 15 shown in FIG. 2 searches the scan data group area 13 for the point of occurrence of a scrum signal (S5). Then, a chattering waveform search process is performed to update the chattering mask data group area 18 (S6).
[0033]
More specifically, the processing shown in FIG. 6 is executed. In general, the minimum width from the detection of the contact waveform to the separation or the separation to the detection as shown in the upper part of FIG. t = 4 msec or more. Therefore, if the time is less than 4 msec as shown in the illustrations t1 and t2, the processing is performed assuming chattering (lower part in FIG. 7).
[0034]
First, in the scan data group area 13, the change data position X1 is extracted in the time series direction from the point of occurrence of the scrum, and the chattering mask data group area 18 is updated (S21, S22). The updating method is performed for the “relative time from the occurrence of the scrum” and the “scan data group of the change data X1” as shown in FIG. Similarly, the next change data position X2 is extracted (S23). If the change width of the change data X2 from the change data X1 is 4 msec or more, the data of X2 is updated in the chattering mask data group area 18 as it is because there is no chattering waveform (S24).
[0035]
At this time, if the change width is less than 4 msec, X2 is not updated to the chattering mask data group area 18 because of the chattering waveform. X2 is moved to X1 to perform the chattering process based on the change data position X2 (S25). Furthermore, in order to determine the completion of the chattering process, it is checked whether or not change data has been extracted for 10 seconds or more from the point of occurrence of the scrum. If 10 seconds have not elapsed, the chattering process is continued (S26).
[0036]
Subsequently, timing deviation data processing is executed by the timing deviation data processing means 16 based on the chattering mask data group area 18 (S7).
[0037]
In detail, the processing shown in FIG. 9 is performed, and based on the detection of the first pulse of F3 from the occurrence of the scrum, the detection of the pulse change of the stroke% detected thereafter is set as 100% value, and the timing shift data group area is set. Update . First, in the contents of the chattering mask data group area 18, a change in the first pulse signal of F3 indicating the entire insertion position is searched from the occurrence of the scrum (S31). Based on the detection of the occurrence of this pulse, a search is made for a subsequent change in the stroke% signal (S32). Since the signal change of the stroke% is at the 100% position, the timing shift data group area 19 is updated. (S33). As a result, the relative time data at the time of the signal change obtained from the stroke 100% position toward the scrum signal generation direction is stored and updated in the timing shift data group area 19 (S34). When the data search of the chattering mask data group area 18 reaches the point at which the scrum signal is generated, the processing ends (S35).
[0038]
Further, the data in the analysis data group area 14 is updated by the signal break data processing means 17 based on the data in the timing shift data group area 19 (S8, S9).
[0039]
In detail, the processing shown in FIG. 10 is performed, but when the time of T1 or T2 is equal to or less than 20 msec as shown in the upper part of FIG. 11, only the last waveform is left as shown in the lower part, and the previous waveform is left. Is deleted.
[0040]
First, as shown in FIG. 10, in the contents of the timing shift data group area 19, the scan data X1 of the changing stroke signal is detected from the rear of the data group area, and the analysis data group area 14 is updated (S41). After the update, in the content of the timing shift data group area 19, the change data is further detected from the scan data X1 in the scrum signal detection direction, set to X2, and the analysis data group area 14 is updated (S42). After the update, the scan data of the stroke signal that changes further from X2 in the content of the timing deviation data group area 19 is detected and set to X3 (S43).
[0041]
Here, if the calculation result obtained by subtracting X3 from X2 is 20 msec or less, the analysis data group 55 is updated with the scan data X2 and X3 since one continuous pulse waveform is obtained (S44, S45). The determination of the pulse waveform is repeated until the point at which the scrum signal is generated (S46, S47).
[0042]
As described above, according to the first embodiment, the contact operation is performed in consideration of an event that may occur in advance in the contact signal due to the scrum operation, so that a correct scrum time is calculated. As a result, an accurate scrum time can be provided to the operator in real time, and the start-up of the plant can be accelerated. In addition, a transient contact malfunction such as chattering occurs, or the scrum time can be correctly measured even in the control rod drive adjustment stage. Further, the operation of adjusting the operation of the contact point in the magnetic field is not required. Since the mechanical operation part is not used in the measuring unit, the scrum operation data can be collected reliably, the mental burden on the operator is reduced, and the processing is performed using digital numerical values. There is no variation in the evaluation, and highly reliable evaluation can be performed.
[0043]
Next, a second embodiment of the present invention will be described with reference to FIG.
[0044]
In the second embodiment shown in FIG. 12, a control rod number extracting means 21, a form processing means 22, a printer 23, and a control rod number correspondence table 24 are added to the first embodiment shown in FIG.
[0045]
The control rod number extracting means 21 extracts the control rod number of the analysis data stored in the analysis data group area 14 with reference to the control rod number correspondence table 24. The form processing means 22 calculates a scrum time for each control rod number, processes the form into a predetermined form, and outputs the processed form to the printer 23.
[0046]
The control rod number extracting means 21 performs the processing shown in FIG. 13 and obtains the control rod numbers based on the changed data in the analysis data group area 14 with reference to the control rod number correspondence table 24 shown in FIG. (S51). The form processing means 22 takes in the data from the analysis data group area 14, processes it into a form, and outputs it to the printer 23 (S52).
[0047]
More specifically, the control rod number extracting unit 21 first checks whether there is any scan data that has changed in the contents of the analysis data group area 14 by the processing shown in FIG. 14 (S61, S62). If not, the process is terminated. If there is, the control rod number correspondence table 24 shown in FIG. 15 is searched based on the changed hard location number of the scan data to obtain the control rod coordinates (S63 to S65). Then, as shown in FIG. 16, the scrum time is printed and output at the insertion position for each control rod number.
[0048]
In this way, the conventional operator does not need to search for the measurement control rod coordinates and connect the electromagnetic oscilloscope or the like, and the scram time of the control rod number that has been operated reliably can be collected, thereby improving reliability. Thus, the work load on the operator is reduced.
[0049]
Next, a third embodiment of the present invention will be described with reference to FIG.
[0050]
In the third embodiment shown in FIG. 17, a scrum signal generation display means 25 is added to the second embodiment shown in FIG.
[0051]
The scrum signal generation display means 25 displays and informs that the scram signal generator 2 is in a standby state in which a scram operation can be executed when a single control rod is to be scram operated by operator intervention.
[0052]
As shown in FIG. 18, the scrum signal generator 2 and the scrum signal generator / display unit 25 are provided with switches SW1 to SW205 corresponding to the control rod numbers 1 to 205. As a result, the contacts are opened when the operator individually performs a single scrum operation. SW1 to SW205 form a series circuit, and are connected to the power supply 26 of the scrum signal generation and display means 25. In the series circuit, a display lamp 27 and a display lamp 28 are connected in parallel.
[0053]
In this configuration, when any of SW1 to SW205 is turned off for an arbitrary control rod as shown in FIG. 19, a scrum signal is output, and the display lamps 27 and 28 of the scrum signal generation display unit 25 are turned off (S71). , S72). When reset, the display lamps 27 and 28 of the scrum signal generation display means 25 are turned on (S73, S74).
[0054]
Thus, if there is a scrum operation command for any one of the scrum SWs, the SW is turned off and the collective display window is turned off. When the switch indicating the scrum operation command is returned from the scrum command to the normal position, the switch is turned on, and the display lamps 27 and 28, which are collective display windows, are turned on to indicate a scram operation standby state.
[0055]
In this way, when the operator issues the next scrum operation command, all the scrum SW states of all the control rods are displayed and notified in one display window without checking each scrum SW state of the other control rods each time. And the burden on the operator can be reduced.
[0056]
In addition, as another embodiment, the present invention can be applied to a general industrial plant. That is, when data such as transient events that change at a high speed as an event trigger, for example, events such as turbine trip sequence, temperature change, voltage / power supply fluctuation and flow / pressure fluctuation, etc. are collected, chattering timing deviation and signal break are processed. To obtain appropriate data.
[0057]
【The invention's effect】
As described above, according to the present invention, the scram time is calculated by correcting the timing shift, so that the accurate scrum time can be calculated without being affected by the timing shift caused when the control rod is adjusted. it can.
Also, even if chattering or signal cracking occurs in the scan data signal waveform, it can be corrected to make it a normal signal, so that the correct scrum time can be calculated and reliable verification of the soundness of the control rod scram operation is possible. It becomes.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a scrum timing recorder device showing a first embodiment of the present invention.
FIG. 2 is a configuration diagram of signal analysis processing means provided in the scrum timing recorder device of FIG. 1;
FIG. 3 is a flowchart showing a processing procedure of the scrum timing recorder device of FIG. 1;
FIG. 4 is a configuration diagram of a scan data group area provided in the scrum timing recorder device of FIG. 1;
FIG. 5 is an explanatory diagram showing details of a scan data group area in FIG. 4;
FIG. 6 is a flowchart illustrating a processing procedure of a chattering mask processing unit in FIG. 2;
FIG. 7 is an explanatory diagram showing an operation of the chattering mask processing means of FIG. 2;
FIG. 8 is a configuration diagram showing an analysis data group area of FIG. 1;
FIG. 9 is a flowchart illustrating a processing procedure of a timing shift data processing unit in FIG. 2;
FIG. 10 is a flowchart showing a processing procedure of a signal break data processing means of FIG. 2;
FIG. 11 is an explanatory diagram showing the operation of the signal break data processing means of FIG. 2;
FIG. 12 is a configuration diagram of a scrum timing recorder device according to a second embodiment of the present invention.
FIG. 13 is a flowchart showing a processing procedure of control rod number extracting means provided in the scrum timing recorder of FIG.
FIG. 14 is a specific flowchart of FIG.
FIG. 15 is a configuration diagram showing a control rod number correspondence table provided in the scrum timing recorder device of FIG. 12;
FIG. 16 is a print example output to a printer provided in the scrum timing recorder device of FIG. 12;
FIG. 17 is a configuration diagram of a scrum timing recorder device showing a third embodiment of the present invention.
18 is a configuration diagram of a scrum signal generation display unit and a scrum signal generation device provided in the scrum timing recorder device of FIG.
FIG. 19 is a flowchart showing a processing procedure of a scrum signal generation / display unit in FIG. 17;
FIG. 20 is a configuration diagram showing a conventional scrum timing recorder device.
FIG. 21 is a timing chart showing signals when a scrum occurs.
FIG. 22 is an explanatory diagram showing a contact point of the control rod position detecting device.
FIG. 23 is an example of a chattering output waveform of the control rod position detecting device.
FIG. 24 is a first explanatory diagram showing a timing shift output waveform.
FIG. 25 is a second explanatory diagram showing a timing shift output waveform.
FIG. 26 is an explanatory diagram showing a signal break output waveform.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 control rod position detector 2 scrum signal generator 10 process input means 11 measurement processing means 12 signal analysis processing means 13 scan data group area 14 analysis data group area 15 chattering mask processing means 16 timing shift data processing means 17 signal break data processing Means 18 Chattering mask data group area 19 Timing shift data group area 21 Control rod number extraction means 22 Report processing means 24 Control rod number correspondence table 25 Scrum signal generation display means

Claims (3)

A control rod stroke% position detection device for detecting and outputting each control rod stroke% position signal representing each stroke% position of a plurality of control rods disposed in the reactor, and a scrum signal for urgently inserting the control rod. A scram signal generating device for generating a scram signal from the control rod stroke% position signal when the control rod is inserted by the scram signal, and verifying the soundness of the scram operation of the control rod by the scrum time Scrum timing recorder device
Process input means for taking in scan data of each stroke% position obtained by scanning each of the control rod stroke% position signals by input of the scrum signal, and scan data taken in by the process input means in time series Measurement processing means for extracting change data over time and storing the data in the scan data group area; and performing signal analysis processing on the scan data stored in the scan data group area by the measurement processing means, and converting the obtained analysis data into analysis data. Signal analysis processing means for storing in the group area,
This signal analysis processing means
The scan data extracted in the scan data group area is used as relative time data from the occurrence of the scrum, and when there is a chattering waveform in the scan data, a predetermined correction process is performed to obtain a normal pulse-like signal from the occurrence of the scrum. Chattering mask processing means for storing the relative time data of the chattering mask data group area,
The timing shift in which the next signal change based on the pulse generated before the control rod stroke 100% insertion detection position is regarded as the control rod stroke 100% insertion position detection signal and the relative time data is stored in the timing shift data group area Data processing means;
When there is a signal crack in the relative time data stored in the timing shift data group area, a signal crack data processing means for performing predetermined signal crack correction processing and saving only normal relative time data in the analysis data group area is provided. A scram timing recorder device for verifying the soundness of the scram operation of the control rod with reference to the relative time data stored in the analysis data group area. Control rod number extracting means for extracting control rod numbers by referring to the control rod coordinate table for the analysis data stored in the analysis data group area, calculating a scrum time for each control rod number, and processing the data into a predetermined form 2. The scrum timing recorder according to claim 1, further comprising a form processing means for outputting the data to an output device. 3. A scrum signal generation display means for displaying and notifying that a scram operation is ready to be executed when a scrum operation is performed by an operator's intervention is provided. Scrum timing recorder device.

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