JPH07280984A - Output region monitoring system - Google Patents

Abstract

PURPOSE:To shorten the response time for monitoring draw-up of control rod by operating a means for transferring data between a receiving memory and first and second memory sections in a control rod draw-up monitoring means and a means for transferring data between the receiving memory and third and fourth memory sections in a data transmission means in parallel. CONSTITUTION:Receiving memories 14a, 14b at first and third memory sections are arranged on the transmission function section 12 of a data transfer means so that they have an identical address when viewed from the bus control section 10 in the data transfer control means. Data can be transferred at a high speed from a receiving memory 7 to the receiving memories 14a, 14b because the control function section 10 simply transfers data only once from the memory 7 to the memories 14a, 14b for each data receiving function section 8. Monitoring results are transferred from a control rod draw-up monitoring function section 11 through the transmission function section 12 when the control function section 10 transfers data from a local memory 16a at the second memory section to a local memory at the fourth memory section. Since data is transmitted only once, response time after detection before draw-up monitor output is shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used during power range operation of a nuclear reactor, and monitors the in-reactor state based on the output signal output from a neutron detector installed in the reactor core.
The present invention relates to an output area monitor system that outputs a control rod withdrawal prevention signal, and more particularly to an output area monitor system that shortens the response time for control rod withdrawal monitoring.

[0002]

2. Description of the Related Art Conventionally, for example, in a nuclear power plant, an output range monitor system has been used as a system for monitoring the operating state of a nuclear reactor and outputting a control signal to a control rod of the nuclear reactor. ing.

FIG. 3A is a block diagram showing a configuration example of a conventional output area monitor system of this type. Figure 3
In (a), the inside of the reactor is divided into several sections, and the detector 30 and the local output monitor 3 are provided so that the average output of the entire reactor can be monitored independently in each section.
1. An average output monitor 32 is arranged. Among these, one average output monitor 32 is provided corresponding to one section, and receives outputs from the plurality of detectors 31 arranged in the section via the local output monitor 31.

In this output range monitoring system, the local output monitor 31 amplifies the LPRM signal (current value), which is the neutron detection output received from the detector 30, and performs I / V conversion, A / D conversion, and detector sensitivity correction. And transmits it to the average output monitor 32. The average output monitor 32 calculates the average output of the entire reactor from the received LPRM signals of several tens of channels, and also receives the information received from the local output monitor 31 and the average output monitor information from the control rod pull-out monitoring device 33 and the data transmission device. Data is transmitted to 34. Data transmission from the average output monitor 32 is performed in a fixed cycle, and the average output monitor 32 sequentially transmits data blocks to the control rod pull-out monitoring device 33 and the data transmission device 34. Further, a control signal or data is transmitted from the control rod pull-out monitoring device 33 or the data transmission device 34 to the control rod control device 35, the host computer 36, the recorder / alarm device 37, etc., and these elements output areas. The monitor system is configured.

Next, the control rod withdrawal monitoring device 33 and the data transmission device 34 in the conventional output area monitoring system will be described in detail. FIG. 3B is a block diagram showing a configuration example of a conventional control rod pull-out monitoring device 33.

In FIG. 3 (b), the control rod pull-out monitoring device 33 performs pulling-out operation among hundreds of tens of control rods (the number of which is installed depends on the maximum output value of the reactor) in the reactor. It is a device that monitors the local output around the control rod to perform, and outputs an alarm or a control rod withdrawal prevention signal to protect the reactor when the local output exceeds a preset value.
High-speed response is required.

In the control rod pull-out monitoring device 33, the data receiving function units 40 are prepared for the respective average output monitors 32, and data is transmitted from the average output monitors 32 in a one-to-one correspondence. Then, the transmitted data is received via the interface 41, and the data is stored in each common memory 42 in the data receiving function unit 40.

Next, the control rod pull-out monitoring / calculation unit 44 controlling the system bus 43 reads out the data from the common memory 42 and uses the data to perform the monitoring calculation. Then, the calculation result is transmitted to the data transmission device 34 via the interface 45a. On the other hand, a control signal such as a control rod pull-out prevention signal is transmitted to the control rod control device 35 via the interface 45b based on the result of the above-described monitoring calculation. Further, the monitoring calculation result is displayed on the display 46 as needed.

Next, FIG. 3C is a block diagram showing a configuration example of the conventional data transmission device 34. In FIG. 3C, the data transmission device 34 includes a local output monitor 31,
The information from the average output monitor 32 and the information of the monitoring calculation of the control rod pull-out monitoring device 33 are data-transmitted to the host computer 36, and if necessary, an analog signal or a contact signal is output to the recorder / alarm device 37. .

The data transmission device 34 has the same function as the data receiving function unit 40 of the control rod withdrawal monitoring device 33, and each data receiving function unit 50 including the interface 51 and the memory 52 has a control rod withdrawing monitoring device. The same data received at 33 is displayed on each average output monitor 3
Received from 2. Further, the data from the control rod pull-out monitoring device 33 includes data receiving function unit 50a (interface 51a, interface 51a, which has the same function as the data receiving function unit 50).
It is received by the memory 52a). And system bus 5
The transmission device arithmetic unit 54 controlling 4 reads data from the common memories 52, 52a on the data reception function units 50, 50a to the transmission device arithmetic unit 54, performs necessary arithmetic operations, and then performs the interface processing. Data transmission to the host computer 36 via 55a and 55b, recorder / alarm device 37
Output to.

By the way, the control rod pull-out monitoring device 33 and the data transmission device 34 receive the same data block from the average output monitor 32 as described above.
Therefore, at first glance, it seems that the control rod withdrawal monitoring device 33 and the data transmission device 34 need not be separate devices, but the control rod withdrawal monitoring device 33 is a device that requires high-speed responsiveness. By using separate devices, it is possible to prevent processing delay due to congestion of the system bus, and reduce the calculation processing load of the calculation unit. Therefore, in the conventional output area monitor system, such a system configuration is required to ensure high-speed response.

[0012]

As described above, shortening the response time of control rod pull-out monitoring by the control rod pull-out monitoring device is one of the most important performance improvements of the output area monitor system. By the way, since each device in the output area monitor system is digitized, digital data transmission means is used to transmit information between the devices.
In general, data transmission in a digital system may be serial transmission or the like, but the larger the amount of transmission data, the longer the time and processing time spent for data transmission.

Therefore, the control rod withdrawal monitoring device 33 described above is used.
In, the maximum response time from when the neutron detection output signal from the detector 31 changes to when the control rod pull-out monitoring device 33 issues a control signal to the control rod control device 35 is obtained by the following equation.

Maximum response time = Processing time of local output monitor + Processing time of average output monitor + Transmission time + Transmission cycle seen from control rod pull-out monitoring device (function) + Processing time of control rod pull-out monitoring device (function) (( 1) According to this formula, when considering shortening the maximum response time of control rod pull-out monitoring in the output area monitoring system, first, the processing time of the local output monitor and the processing time of the average output monitor depend on the performance of each device. Since it is time to do this, it is excluded from the target here. Next, since the transmission time depends on the transmission data amount of the data block to be transmitted, if the conventional data amount is handled, it does not contribute to the reduction of the response time.

The transmission cycle viewed from the control rod pull-out monitor is half the transmission cycle of the average output monitor because the average output monitor sends the same data to both the control rod pull-out monitor 33 and the data transmitter 34. It has become. However, if the control rod withdrawal monitoring device 33 and the data transmission device 34 are simply integrated in order to shorten the transmission cycle viewed from the control rod withdrawal monitoring device, the processing delay due to the congestion of the system bus as described above and the calculation unit. Due to the increase in the calculation processing load, the processing time of the control rod pull-out monitoring device (that is, the calculation processing time regarding the control rod pull-out monitoring) becomes longer this time.

The present invention has been made in view of the above circumstances, and the control rod pull-out monitoring is performed by shortening the data transmission cycle from the average output monitor without increasing the calculation processing time for the control rod pull-out monitoring. It is an object of the present invention to provide an output area monitor system capable of remarkably shortening the response time.

[0017]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a local output of the nuclear reactor core based on signals from a plurality of neutron detecting means installed inside the nuclear reactor core, and In an output range monitoring system that monitors the average output and outputs a control signal that controls a control rod in a nuclear reactor based on a predetermined condition, at least signals sent from a plurality of neutron detection means are stored. One receiving and storing means, and a first storage section in which the data stored in the receiving and storing means is transferred and stored.
A data processing unit that performs data processing based on the data in the storage unit, and a second storage unit that stores the processing result processed by the data processing unit, and based on the processing result processed by the data processing unit. Control rod withdrawal monitoring means for outputting a control signal for controlling the control rod, a third storage section in which the data stored in the reception storage means is transferred and stored, and a data processing section of the control rod withdrawal monitoring means. A data storage unit for transmitting the transmission data based on the data stored in the third and fourth storage units, and a fourth storage unit for storing and storing the processed processing result; A common bus connecting the control rod withdrawal monitoring means and the data transmission means to each other is provided, and the reception storage means, the first or second storage section in the control rod withdrawal monitoring means, and the data transmission means are provided. Become comprises third or a data transfer control means for controlling the data transfer between the fourth storage unit,
It is an output area monitor system for operating each means in parallel.

The invention according to claim 2 is the invention according to claim 1, which is connected to the control rod withdrawal monitoring means and / or the data transmission means, and is processed by the data processing unit of the control rod withdrawal monitoring means. The output area monitor system further includes display means for displaying the processing result and / or the data transferred from the reception storage means.

Further, the invention according to claim 3 is the output region monitoring system according to claim 1 in which the signals from a plurality of neutron detecting means are processed and the receiving and storing means is provided. The output area monitor system is provided with a processing transmission means for transmitting to and a transmission means for connecting the processing transmission means and the reception storage means.

Furthermore, the invention corresponding to claim 4 is as follows.
In the invention corresponding to claim 1, in the output area monitoring system according to claim 1, a process connected to the control rod withdrawing monitoring means and / or the data transmitting means and processed by the data processing unit of the control rod withdrawing monitoring means. Display means for displaying the result and / or data transferred from the reception storage means, processing transmission means for processing the signals from the plurality of neutron detection means and transmitting them to the reception storage means, and the processing transmission means and the reception storage means. It is an output area monitor system including a transmission means for connecting to and.

[0021]

Therefore, in the output area monitor system of the invention according to the first aspect, the data transfer on the bus is performed only by the data transfer control means by taking the above means. The data on the reception storage means sent from the neutron detection means is transferred by the data transfer control means and stored in the first storage section of the control rod withdrawal monitoring means and the third storage section of the data transmission means, respectively. First
The data processing unit performs monitoring calculation on the data stored in the storage unit. When it is determined that it is necessary to stop the control rod withdrawal based on the result of the monitoring calculation, a control signal is sent to the control rod control device, while the monitoring calculation result is stored in the second storage unit. Memorized in. The monitoring calculation result stored in the second storage unit is transferred to the fourth storage unit of the data transmission unit by the data transfer control unit. The data stored in the third storage unit and the fourth storage unit on the data transmission unit are processed for data transmission in the data transmission unit and transmitted to an external device or the like.

On the other hand, these data transfer control means, reception storage means, control rod pull-out monitoring means and data transmission means operate in parallel, and only the data transmission means controls the common bus. Even if the control rod withdrawal monitoring means and the data transmission means are provided as separate devices, the CPU
There will be no delay in processing due to increased burden or bus congestion. Compared to the case where the control rod pull-out monitoring means and the data transmitting means are separate devices, the number of receiving and storing means is half, so the transmission cycle from the detecting means seen from the control rod pull-out monitoring means is 1/2. Therefore, it is possible to shorten the response time of the control rod withdrawal monitoring according to the formula (1).

Further, in the power range monitor system of the invention according to claim 2, the same operation as in the invention according to claim 1 is performed, and the additional display means allows the on-site operator to directly monitor the reactor. It is possible to monitor and detect failures early.

Further, in the output range monitoring system of the invention according to claim 3, the same operation as in the invention according to claim 1 is achieved, and the control rod withdrawal monitoring means and the data transmission means are separate devices. Compared with the above, since the number of transmission members can be reduced to about half, it is inexpensive, and installation workability and maintainability between the processing transmission means and the reception storage means can be improved.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration example of an output area monitor system according to the present invention.

In FIG. 1, the power range monitor system is provided with a large number of neutron detectors 1 arranged at various parts in the reactor core for detecting the power and neutron detector signals of about 10 channels per unit. Local output monitor 2
And a plurality of average output monitors 3 each of which is connected with several local output monitors 2 for information transmission, and an average output monitor 3 is connected with an optical fiber cable 4 or the like for information transmission and output to an external device. The area monitor device 5 is used.

The output area monitor device 5 also has a one-to-one correspondence with the average output monitor 3 and receives the information transmitted from the average output monitor 3 via the interface 6 in the reception memory 7.
A data reception function unit 8 stored in the system, a system bus 9 for transferring data between the function units, a bus control function unit 10 for controlling data transfer between the function units via the system bus 9, and a reception By the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 which calculate based on the data transferred from the memory 7 and output to the external device, and the display 13 which displays the information from the control rod pull-out monitoring function unit 11. It is configured.

Here, the control rod pull-out monitoring function unit 11
Is the receiving memory 1 to which the data in the receiving memory 7 is transferred.
4a, a CPU 15a for performing a monitoring calculation relating to the control rod withdrawal based on the information in the receiving memory 14a and controlling the entire control rod withdrawal monitoring function unit 11, and a CPU 15a for storing the monitoring operation result and the like used for each processing. other,
A local memory 16 used during data transfer between the control rod pull-out monitoring function unit 11 and the data transmission function unit 12.
a and the control rod control device 17, which is an external device and controls pulling and inserting of the control rod, based on the monitoring calculation result.
The interface 18a used when the U15a issues a control signal such as a pull-out prevention signal, and the display 1
3 and an interface 18b for controlling the device 3.

The data transmission function unit 12 also includes a receiving memory 14b to which the data in the receiving memory 7 is transferred and a CP.
U15b is used not only for each processing but also for the local memory 16b used during data transfer between the control rod pull-out monitoring function unit 11 and the data transmission function unit 12, the receiving memory 14b, the interface 19a based on the information in the local memory 16b, It is configured by a CPU 15b that controls data transmission and the entire data transmission function unit 12 via 19b. In addition, the interface 19a,
An upper computer 20, which is an external device, and a recorder / alarm device 21 are connected via 19b.

Further, the receiving memories 14a and 14b on the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 are
The same addresses are arranged when viewed from the bus control function unit 10, and the local memories 16a and 16b are arranged so that they are different addresses when viewed from the bus control function unit 10.

The reception recording means is, for example, the data reception function section 8, and the control rod pull-out monitoring means is, for example, the control rod pull-out monitoring function section 11. The first storage unit is, for example, the receiving memory 14a, the second storage unit is, for example, the local memory 16a, the data processing unit is, for example, the CPU 15a, and the data transmission unit is, for example, the data transmission function unit. 12, the third storage unit is, for example, the receiving memory 14b, and the fourth storage unit is, for example, the local memory 16b. Further, the data transfer control means includes, for example, the system bus 9 and the bus control function unit 10, and the display means is, for example, the display 13.
The processing transmission means is, for example, an average output monitor 3, and the transmission means is, for example, an optical fiber cable 4.

Next, the operation of the output area monitor system of the present embodiment constructed as described above will be explained. First, the local output monitor 2 inputs a signal from the neutron detector 1, performs I / V conversion and A / D conversion, then performs signal processing such as sensitivity correction, and transmits information to the average output monitor 3. .

Next, the average output monitor 3 calculates and monitors the average output of the entire reactor from the information received from the local output monitor 2. Also, the average output monitor 3 transmits the information received from the local output monitor 2 and the average output monitoring information to the output area monitor device 5 through the optical fiber cable 4.

On the other hand, the output area monitor device 5 receives information at the data receiving function section 8 connected to the average output monitor 3 on a one-to-one basis. The received information is stored in the reception memory 8 on each data reception function unit 8. In the output area monitor device that has received the data, various processes or operations are performed based on this data. These processes or operations are performed by the respective functional units, that is, the data reception functional unit 8, the bus control functional unit 10, The control rod pulling-out monitoring function unit 11 and the data transmission function unit 12 are performed in parallel.

The transfer of data required for the processing or operation between the functional units is performed through the system bus 9.
Only the bus control function unit 10 controls data transfer between the function units via the system bus 9.

To explain this point in more detail,
First, the control rod pull-out monitoring function unit 11 and the receiving memories 14a and 14b on the data transmission function unit 12 are arranged so as to have the same address when viewed from the bus control function unit 10. Therefore, from the receiving memory 7 to the receiving memories 14a, 14
To transfer the data to b, the bus control function unit 10 may transfer the data stored in the reception memory 7 for each data reception function unit 8 to the reception memories 14a and 14b one by one in order. It is done at high speed.

Next, the data transmission function unit 12 sends the monitoring calculation result of the control rod pull-out monitoring function unit 11 to the host computer 2.
When the data is to be transferred to 0 or the like, the bus control function unit 10 transfers the data from the local memory 16a on the control rod pull-out monitoring function unit 11 to the local memory 16b on the data transfer function unit 12 via the system bus. It is done by transferring.

On the contrary, when the control rod pull-out function unit 11 needs the data of the data transfer function unit 12, the data transfer is performed by the bus control function unit 10 on the data transfer function unit 12 via the system bus. This is performed by transferring data from the local memory 16b to the local memory 16a on the control rod pull-out monitoring function unit 11.

Next, the operations of the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 to which necessary data have been transferred will be described in detail. First, the control rod pull-out monitoring function unit 11 monitors and calculates the data transferred to the receiving memory 14a, and displays the data on the display 13 and outputs a signal to the control rod control device 17, which is an external device.

Here, the control rod withdrawal monitoring function unit 11 is
The display processing and the signal output processing to the external output device are independently performed without the system bus 9. Further, among the information processed by the data transmission function unit 12 and transmitted to the external device, the failure information of the local output monitor 2 and the average output monitor 3, alarm information, etc. are controlled by the bus control function unit 10 to monitor the control rod withdrawal function. It is also transferred to the section 11 and is collectively displayed on the display 13 by the operation of the operator.

Next, the data transmission function unit 12 performs data conversion for outputting the data transferred to the reception memory 14b to the host computer 20 and the recorder / alarm device 21, which are external devices, and then to each external device. Output.

Here, the output to the external device is independently performed without passing through the system bus 9 as in the case of the control rod pull-out monitoring unit 11. Further, the signal output from the control pull-out monitoring unit 11 to the host computer 20 and the recorder / alarm device 21 is performed via the data transmission function unit 12. Therefore, the data movement is performed by the bus control function unit as described above. 10 is performed by transferring data from the local memory 16a on the control rod pull-out monitoring function unit 11 to the local memory 16b on the data transmission function unit 12 via the system bus.

As described above, the output area monitoring system according to the present embodiment has the data receiving function unit 8 and the control rod pull-out monitoring function unit 11 which calculates based on the data transferred from the receiving memory 7 and outputs it to the external device. And a data transmission function unit 12, a system bus 9 for transferring data between the function units, and a bus control function unit 10 for controlling data transfer between the function units via the system bus 9. It is housed in one area output device, each functional unit performs processing and operation in parallel, and data transfer via the system bus 9 is controlled only by the bus control functional unit 10. Compared with the case where the unit 11 and the data transmission function unit 12 are provided as separate devices, congestion of the system bus 9 and C
The processing will not be delayed due to the increased load on the PUs (15a, 15b). When the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 are separate devices, the average output monitor 3 has to perform data transmission to each device (that is, the same data is transmitted twice). On the other hand, since the data transmission only needs to be once, the transmission cycle seen from the control rod pull-out monitoring function unit 11 can be halved from the conventional one (see Table 1). It is possible to shorten the maximum response time of control rod withdrawal monitoring in the system, that is, the maximum response time from the change in the neutron detector signal to the output of the control rod withdrawal monitoring function unit (device).

Since the transmission cycle viewed from the control rod pull-out monitoring function unit 11 can be halved, the maximum response time of the control rod pull-out monitoring is shortened by 12% as a whole. Furthermore, since the functions that were conventionally divided into the control rod pull-out monitoring device 33 and the data transmission device 34 are integrated in the output area monitoring device 5, the configuration of the output area monitoring system can be simplified and the overall size can be reduced. it can.

[0045]

[Table 1]

Further, the output area monitor system of the present embodiment can improve reliability as compared with the conventional system. In other words, the reliability of the output area monitoring system depends on the control rod pull-out monitoring function unit 11 and the data transmission function unit 1.
Compared to the case where 2 are separate devices, the number of data receiving function units 8 is reduced, which is an improvement. When the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 are provided as separate devices, the failure rate except for the neutron detector to the average output monitor of the output area monitor system is Q1, and the failure rate of the output area monitor system of the present embodiment is Q1. If the failure rate excluding the neutron detector to the average output monitor is Q2 and the number of average output monitors 3 is N, Q1 and Q2 are as follows.

Q1 = (failure rate of control rod pull-out monitoring device) + (failure rate of data transmission device) = (N * q1 + q2) + ((N + 1) * q1 + q3) = (2N + 1) * q1 + q2 + q3 (2) Q2 = N * q1 '+ q2' + q3 '+ q4 (3) where q1: failure rate of the conventional control rod pull-out monitoring device 33 and the data receiving function unit 40 of the data transmission device 34, q
2: Failure rate of functions excluding the data receiving function section 40 of the conventional control rod pull-out monitoring device 33, q3: Failure rate of functions excluding the data receiving function section 40 of the conventional data transmission apparatus 34, q1 ′: This implementation Failure rate of the data receiving function section 8 of the output area monitoring device 5 of the example, q2 ′: Failure rate of the control rod pull-out monitoring function section 11 of this embodiment, q3 ′: Failure rate of the data transmission function section 12 of this embodiment. , Q4: failure rate of the bus control function unit 10 of the present embodiment, where q1 = q1 ′, q2≈q2 ′, q3≈q3 ′, and thus Q2 is as follows.

Q2 = N * q1 + q2 + q3 + q4 (4) Therefore, if q4 <N * q1, then Q2 <Q1. In general, the bus control function unit 10 is a device that only moves data on the common memory and has a small number of parts. Therefore, it is considered that its reliability is about the same as that of the data reception function unit 8 (that is, q4≈). q1) and q4 << N * q1. As a result, Q2 becomes N * q1-q more than Q1.
It will be as small as 4. Therefore, the output area monitoring system of the present embodiment has a smaller overall failure rate and higher reliability than the conventional system.

On the other hand, the output area monitor system according to the present embodiment calculates the data based on the data received from the data receiving function unit 8 and the receiving memory 7, and outputs the data to the external device. Transmission function unit 12
And a system bus 9 for performing data transfer between the functional units, a bus control function unit 10 for controlling data transfer between the functional units via the system bus 9, and a display 13 to provide one area output device. Each function unit processes and operates in parallel, data transfer via the system bus 9 is controlled only by the bus control function unit 10, and each information is collectively displayed by an operator's operation. In addition to the above effects, it is possible to do local management by the site operator in addition to the above information sent to the host computer so that the reactor can be monitored more reliably and early failures can be detected. You can

Further, the output area monitoring system according to the present embodiment has a data receiving function unit 8, a control rod pull-out monitoring function unit 11 for performing calculation based on the data transferred from the receiving memory 7 and outputting the data to an external device, and data transmission. Functional part 12
And a system bus 9 for performing data transfer between the functional units, a bus control function unit 10 for controlling data transfer between the functional units via the system bus 9, and a display 13 to provide one area output device. In addition, the average output monitor 3 and the optical fiber cable 4 are provided so that the functional units perform processing and operations in parallel, and data transfer via the system bus 9 is performed only by the bus control functional unit 10. Since the information is controlled so that each information can be collectively displayed on the display 13 by the operation of the operator, in addition to the above effect, when the control rod pull-out monitoring function unit 11 and the data transmission function unit 12 are provided as separate devices. It is possible to reduce the number of the optical fiber cables 4 to about half as compared with.

That is, since the number of data receiving function units 8 is half that of the conventional one (data receiving function unit 40 + data receiving function unit 50), assuming that the number of average output monitors is N, the number of the optical fiber cables 4 which are connection cables is reduced. The number is as follows, and the number of connection cables can be reduced by N + 1.

Number of optical fiber cables used in the conventional output area monitor system Between the average output monitor 32 and the control rod pull-out monitoring device 33; N
Between the average output monitor 32 and the data transmission device 34; N
Between the control rod pull-out monitoring device 33 and the data transmission device 34; 1
Number of optical fiber cables used in the output area monitoring system of the present embodiment Average output monitor 3 to output area monitoring device 5; N
On the other hand, in a nuclear power plant or the like, the average output monitor 3 and the output range monitoring device 5 (the conventional control rod pull-out monitoring device 33
In addition, the data transmission device 34) is often installed in a remote place, and the average output monitor 3 belonging to the reactor safety meter is for electrical separation from other connecting devices as used in this embodiment. In many cases, the optical fiber cable 4 is used. However, since the optical fiber cable 4 is expensive, is easily damaged, and requires special handling, it is possible to reduce the cost by reducing the number of connection cables.
Installation workability and maintainability can be improved.

In this embodiment, the average output monitor 3
The optical fiber cable 4 is used for the connection between the data receiving function parts 8.
However, the present invention is not limited to this, and other data transmission members and data transmission means may be used.

Further, in this embodiment, the bus control function unit 1
The addresses of the local memories 16a and 16b viewed from 0 are different, and each local memory depends on a portion used for processing in each functional unit and a portion used for data transfer between the control rod pull-out monitoring functional unit 11 and the data transmission functional unit 12. It is configured. However, these parts may be separated,
Control rod pull-out monitoring function unit 11, data transmission function unit 12
By further separating the part used for inter-data transfer from the local memory and providing a data transfer memory having the same address as seen from the bus control function part 10 in each function part, higher speed processing can be performed. You can

Next, another embodiment of the present invention will be described. FIG. 2 is a configuration diagram showing another embodiment of the output area monitoring system according to the present invention. The same parts as those in FIG. 2 are described with the same reference numerals and only different parts will be described here.

In this output area monitoring system, the receiving memory 14a and the local memory 16a are integrated into a common memory 22a, and the receiving memory 14b and the local memory 16b.
Are collectively referred to as a common memory 22b. Other configurations are the same as those in the previous embodiment.

The operation of the output area monitor system according to FIG. 2 is the same as that in the above embodiment. As described above, in the output area monitoring system according to the present embodiment, the receiving memories 14a and 14b and the local memories 16a and 16b are integrated into the common memories 22a and 22b, and other configurations are the same as those in the previous embodiment. In addition to obtaining the same effect as the example, the circuit of each functional unit can be simplified.

[0058]

As described above in detail, according to the present invention, the control rod withdrawal monitoring response is shortened by shortening the data transmission period from the average output monitor without increasing the processing time for the control rod withdrawal monitoring. It is possible to provide an output area monitor system capable of shortening the time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an output area monitoring system according to the present invention.

FIG. 2 is a block diagram showing another embodiment of the output area monitor system according to the present invention.

FIG. 3 is a block diagram showing a configuration example of a conventional output area monitor system.

[Explanation of symbols]

3 ... Average output monitor, 4 ... Optical fiber cable, 5 ...
Output area monitor device, 7 ... Reception memory, 8 ... Data reception function unit, 9 ... System bus, 10 ... Bus control function unit, 1
DESCRIPTION OF SYMBOLS 1 ... Control rod pull-out monitoring function part, 12 ... Data sending function part, 14a, 14b ... Receiving memory, 15a, 15b ... C
PU, 16a, 16b ... Local memory.

Claims (4)

[Claims] 1. A local output and an average output of the reactor core are monitored by signals from a plurality of neutron detection means installed inside the reactor core, and the internal power of the reactor is controlled based on a predetermined condition. In an output area monitor system for outputting a control signal for controlling a control rod, at least one reception storage means for storing signals transmitted from the plurality of neutron detection means, and data stored in the reception storage means are transferred. A first storage unit that is stored in the first storage unit, a data processing unit that performs data processing based on the data in the first storage unit, and a second storage unit that stores the processing result processed by the data processing unit. And a control rod pull-out monitoring unit for outputting a control signal for controlling the control rod based on a processing result processed by the data processing unit, and the reception storage unit. A third storage unit in which the stored data is transferred and stored, and a fourth storage unit in which the processing result processed by the data processing unit of the control rod pull-out monitoring means is transferred and stored. A data transmission unit that transmits transmission data based on the data stored in the third and fourth storage units, a common storage unit that connects the reception storage unit, the control rod withdrawal monitoring unit, and the data transmission unit to each other. A bus is provided to control data transfer between the reception storage means, the first or second storage portion in the control rod pull-out monitoring means, and the third or fourth storage portion in the data transmission means. An output area monitor system, comprising: a data transfer control unit for operating the respective units in parallel. 2. The output area monitoring system according to claim 1, wherein the processing result is connected to the control rod pull-out monitoring means and / or the data transmission means, and is processed by the data processing section of the control rod pull-out monitoring means, and Alternatively, the output area monitor system is characterized by including a display means for displaying the data transferred from the reception storage means. 3. The output area monitor system according to claim 1, wherein a processing transmission means for processing the signals from the plurality of neutron detection means and transmitting the processed signals to the reception storage means, the processing transmission means and the reception storage means. An output area monitor system, characterized in that a transmission means for connecting to and is added. 4. The output area monitoring system according to claim 1, wherein the processing result is connected to the control rod withdrawal monitoring means and / or the data transmission means, and is processed by the data processing unit of the control rod withdrawal monitoring means, and Alternatively, the display means for displaying the data transferred from the reception storage means, the processing transmission means for processing the signals from the plurality of neutron detection means and transmitting them to the reception storage means, and the processing transmission means and the reception storage means An output area monitor system, characterized in that it is provided with a transmission means to be connected.