CN117672569A - Method and system for maintaining accumulated charge outage during nuclear power plant reactor core measurement - Google Patents
Method and system for maintaining accumulated charge outage during nuclear power plant reactor core measurement Download PDFInfo
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- CN117672569A CN117672569A CN202311486111.3A CN202311486111A CN117672569A CN 117672569 A CN117672569 A CN 117672569A CN 202311486111 A CN202311486111 A CN 202311486111A CN 117672569 A CN117672569 A CN 117672569A
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- 238000005259 measurement Methods 0.000 title claims description 20
- 230000004907 flux Effects 0.000 claims abstract description 44
- 238000012545 processing Methods 0.000 claims abstract description 41
- 238000012423 maintenance Methods 0.000 claims description 11
- 230000002159 abnormal effect Effects 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 description 17
- 238000004364 calculation method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000012937 correction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a method and a system for maintaining a nuclear power station reactor core by measuring accumulated charge outage, wherein the method comprises the following steps: receiving a current accumulated charge value transmitted by a neutron flux signal processing cabinet in the reactor core; determining a zero clearing accumulated charge value according to the current accumulated charge value and the current stored last accumulated charge value, wherein the last accumulated charge value is the last accumulated charge value sent by the neutron flux signal processing cabinet in the reactor core in the last time; and determining a power-off maintaining charge value according to the clear accumulated charge value and the current accumulated charge value. According to the invention, the zero clearing accumulated charge value is determined through the received current accumulated charge value and the last accumulated charge value, so that the power failure maintaining charge value is determined, and the accumulated charge data transmitted after the abnormal condition of the neutron flux signal processing cabinet in the reactor core is realized are not cleared by mistake, and the accumulated charge key data for the self-powered neutron detector is still saved, so that the deviation of the reactor core reconstruction is avoided.
Description
Technical Field
The invention relates to the technical field of neutron flux of a nuclear power core, in particular to a method and a system for maintaining accumulated charge outage during nuclear power core measurement.
Background
SPND (Self Powered Neutron Detector, self-powered neutron detector) core neutron current signals of the nuclear power station core measurement system are processed by a core neutron flux signal processing cabinet and then sent to a core online monitoring system, and the core online monitoring system is responsible for communication with DCS (Distributed Control System ) and calculation and monitoring of core power distribution, LOCA territory and the like. The accumulated charge of the SPND core neutron current signal is primarily used to provide a calculated parameter for burnup correction of the core monitoring cabinet. The core neutron flux signal processing cabinet performs charge accumulation calculation on the SPND signal current after delay compensation, and transmits the accumulated charge value to the core monitoring cabinet in real time through a network signal, and the core monitoring cabinet performs burnup correction on the SPND through a correlation algorithm according to the received accumulated charge value.
However, during the operation of the unit, there are cases where accumulated charges are interrupted due to the power failure of the neutron flux signal processing cabinet in the core, and in addition, the board card of the neutron flux signal processing cabinet in the core has no persistent storage, nor has the communication capability of acquiring the historical accumulated charges from the core monitoring database. Therefore, it is desirable to prevent the accumulated charge of the SPND from zeroing after the core neutron flux signal processing cabinet is de-energized to avoid bias in core reconfiguration.
Disclosure of Invention
The invention aims to provide a method and a system for maintaining a nuclear power station reactor core by measuring accumulated charge outage.
The technical scheme adopted for solving the technical problems is as follows: provided is a nuclear power plant core measurement accumulated charge outage maintenance method, including:
receiving a current accumulated charge value transmitted by a neutron flux signal processing cabinet in the reactor core;
determining a zero clearing accumulated charge value according to the current accumulated charge value and a current stored last accumulated charge value, wherein the last accumulated charge value is a last accumulated charge value sent by the reactor core neutron flux signal processing cabinet last time;
and determining a power-off maintaining charge value according to the clear accumulated charge value and the current accumulated charge value.
Further, the determining a clear accumulated charge value according to the current accumulated charge value and the current stored last accumulated charge value includes:
comparing the current accumulated charge value with the currently stored last accumulated charge value;
if the difference value between the current accumulated charge value and the last accumulated charge value is in a preset charge difference value range, taking the current accumulated charge value as the zero clearing accumulated charge value;
and if the difference value between the current accumulated charge value and the last accumulated charge value is not in a preset charge difference value range, setting the zero clearing accumulated charge value as a preset charge value.
Further, the preset charge difference range is greater than or equal to 1mC, and the predetermined charge value is 0.
Further, after determining the zero clearing accumulated charge value according to the current accumulated charge value and the current stored last accumulated charge value, the method further includes:
the current accumulated charge value is taken as the last accumulated charge value stored last.
Further, the determining a power-off hold charge value from the clear accumulated charge value and the current accumulated charge value includes:
and adding and summing the zero clearing accumulated charge value and the current accumulated charge value to obtain the power-off maintaining charge value.
The invention also provides a nuclear power station reactor core measurement accumulated charge outage maintaining system, which comprises:
the accumulated charge receiving module is used for receiving a current accumulated charge value transmitted by the neutron flux signal processing cabinet in the reactor core;
the first charge value determining module is used for determining a clear accumulated charge value according to the current accumulated charge value and a current stored last accumulated charge value, wherein the last accumulated charge value is a last accumulated charge value sent by the neutron flux signal processing cabinet in the reactor core last time;
and the second charge value determining module is used for determining a power-off maintaining charge value according to the zero clearing accumulated charge value and the current accumulated charge value.
Further, the first charge value determining module includes:
the charge value comparison module is used for comparing the current accumulated charge value with the current accumulated charge value;
a first charge value sub-determining module, configured to take the current accumulated charge value as the zero clearing accumulated charge value if a difference value between the current accumulated charge value and the last accumulated charge value is within a preset charge difference value range;
and the second charge value sub-determining module is used for setting the zero clearing accumulated charge value as a preset charge value if the difference value between the current accumulated charge value and the last accumulated charge value is not in a preset charge difference value range.
Further, the preset charge difference range is greater than or equal to 1mC, and the predetermined charge value is 0.
Further, the system further comprises: and the charge value updating module is used for taking the current accumulated charge value as the last accumulated charge value which is stored recently.
Further, the second charge value determining module is further configured to add and sum the cleared accumulated charge value and the current accumulated charge value to obtain the power-off maintaining charge value.
The implementation of the invention has the following beneficial effects:
according to the invention, the current accumulated charge value sent by the reactor core neutron flux signal processing cabinet and the last accumulated charge value stored currently are received to determine the zero clearing accumulated charge value, so that the power-off maintaining charge value is determined, and after the reactor core neutron flux signal processing cabinet is abnormal, the transmitted accumulated charge data are not cleared by mistake, the accumulated charge key data for the self-powered neutron detector are still saved, and the occurrence of deviation of reactor core reconstruction is avoided.
Drawings
The invention will be further described with reference to the accompanying drawings and examples:
FIG. 1 is a schematic diagram of the current nuclear core neutron flux correlation apparatus;
FIG. 2 is a flow chart of a method for maintaining a measured accumulated charge outage of a nuclear power plant core according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of a method for maintaining a measured accumulated charge outage of a nuclear power plant core;
fig. 4 is a block diagram of a nuclear power plant core measurement accumulated charge outage-keeping system according to an embodiment of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
It is noted that the terms "comprising," "including," and "having," and any variations thereof, in the description and claims of the invention and in the foregoing figures, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus. In the claims, specification, and drawings of the present invention, relational terms such as "first" and "second", and the like are used solely to distinguish one entity/operation/object from another entity/operation/object without necessarily requiring or implying any actual such relationship or order between such entities/operations/objects.
As shown in fig. 1, a core neutron current signal of an SPND (Self Powered Neutron Detector, self-powered neutron detector) of a nuclear power plant core measurement system is processed by a core neutron flux signal processing cabinet and then sent to a core on-line monitoring system, and the core on-line monitoring system is responsible for communication with DCS (Distributed Control System ) and calculation and monitoring of core power distribution, LOCA territory and the like. The accumulated charge of the neutron current signal in the core of the SPND is primarily used to provide a calculated parameter for burnup correction of the core monitoring cabinet. The core neutron flux signal processing cabinet performs charge accumulation calculation on the SPND signal current after delay compensation, and transmits the accumulated charge value to the core monitoring cabinet in real time through a network signal, and the core monitoring cabinet performs burnup correction on the SPND through a correlation algorithm according to the received accumulated charge value.
However, during the operation of the unit, there are cases where accumulated charges are interrupted due to the power failure of the neutron flux signal processing cabinet in the core, and in addition, the board card of the neutron flux signal processing cabinet in the core has no persistent storage, nor has the communication capability of acquiring the historical accumulated charges from the core monitoring database. Therefore, it is desirable to prevent the accumulated charge of the SPND from zeroing after the core neutron flux signal processing cabinet is de-energized to avoid bias in core reconfiguration.
Considering that accumulated charges transmitted by the neutron flux signal processing cabinet of the reactor core are cleared by mistake under abnormal conditions (power failure of the neutron flux signal processing cabinet of the reactor core or abnormal communication between the neutron flux signal processing cabinet of the reactor core and the reactor core on-line monitoring system), the key data of accumulated charges of the detector for performing burnup correction are not saved. As shown in fig. 2, an embodiment of the present invention provides a method for maintaining a measured accumulated charge outage of a nuclear power plant core, which can be applied to a core monitoring cabinet, wherein the core monitoring cabinet can store an accumulated charge value, and the method specifically includes the following steps:
s1, receiving a current accumulated charge value transmitted by a neutron flux signal processing cabinet in a reactor core;
s2, determining a clear accumulated charge value according to the current accumulated charge value and the current stored last accumulated charge value, wherein the last accumulated charge value is the last accumulated charge value sent by the neutron flux signal processing cabinet in the reactor core in the last time;
and S3, determining a power-off maintaining charge value according to the clear accumulated charge value and the current accumulated charge value.
When the accumulated charge value is the accumulated charge value transmitted by the reactor core neutron flux signal processing cabinet at the present time, the last accumulated charge value is the accumulated charge value transmitted by the reactor core neutron flux signal processing cabinet at the last time, the accumulated charge value is cleared to be all the charge accumulated values before the accumulated charge value transmitted by the reactor core neutron flux signal processing cabinet is cleared, and the power-off keeping charge value is the accumulated charge value output by the outside and is used for correcting the self-powered neutron detector.
In an embodiment of the present invention, the step S2 specifically includes the following steps:
s21: comparing the current accumulated charge value with the current stored last accumulated charge value;
s22: if the difference value between the current accumulated charge value and the last accumulated charge value is in the preset charge difference value range, taking the current accumulated charge value as a zero clearing accumulated charge value;
s23: if the difference between the current accumulated charge value and the last accumulated charge value is not within the preset charge difference range, the zero clearing accumulated charge value is set as a preset charge value.
Specifically, it is determined whether the neutron flux signal processing cabinet in the core returns to the state after the power failure, so in this embodiment, the current accumulated charge value is selected to be compared with the current stored last accumulated charge value to determine the current situation of the neutron flux signal processing cabinet in the core. In consideration of a certain loss of charge, a certain charge difference range is set, and the difference between the current accumulated charge value and the last accumulated charge value is compared with the charge difference range to determine a clear accumulated charge value. Taking the current accumulated charge value as a zero clearing accumulated charge value, which indicates that the neutron flux signal processing cabinet in the reactor core has abnormal conditions, and the original accumulated charge value cannot be normally used; the zero clearing accumulated charge value is set to be a preset charge value, which indicates that no abnormal condition occurs in the neutron flux signal processing cabinet in the reactor core, the accumulated charge value is not cleared, and the accumulated charge value can be normally used for correcting the self-powered neutron detector.
It is understood that the predetermined charge difference range and the predetermined charge value may be determined according to actual requirements. In this embodiment, the preset charge difference range is greater than or equal to 1mC, and the predetermined charge value is 0.
In an embodiment of the present invention, after step S2, the method further includes:
s24: the current accumulated charge value is taken as the last accumulated charge value stored last time.
Specifically, the original last accumulated charge value is not suitable for the next comparison any more, so after the zero clearing accumulated charge value is determined, the original last accumulated charge value is updated, and the original last accumulated charge value is updated to the current accumulated charge value to be used as the last accumulated charge value stored recently for determining the zero clearing accumulated charge value next time.
In an embodiment of the present invention, there may be a plurality of implementation methods for step S3, where one implementation method for step S3 includes the following steps:
s31: and adding and summing the clear accumulated charge value and the current accumulated charge value to obtain the power-off maintaining charge value.
Specifically, the manner of calculating the power-off maintaining charge value by clearing the accumulated charge value and the current accumulated charge value can be determined according to actual requirements. In this embodiment, the calculation mode is addition and summation, so that the obtained outage maintenance charge value is the actual accumulated charge value, and the self-powered neutron detector is corrected more accurately.
The method for maintaining the measured accumulated charge outage of the nuclear power plant core is described below by taking a specific embodiment as an example.
As shown in fig. 3, the current accumulated charge value Q1 sent by the neutron flux signal processing cabinet in the reactor core at the current time is received, the current accumulated charge value Q1 and the current stored last accumulated charge value Q2 are compared, whether the current accumulated charge value Q1 and the last accumulated charge value Q2 differ by 1mC or not is judged, if the current accumulated charge value Q1 and the last accumulated charge value Q2 differ by 1mC, the last accumulated charge value Q2 is written into the clear accumulated charge value Q3, namely q3=q2; if the two do not differ by 1mC, the clear accumulated charge value Q3 is assigned 0, i.e., q3=0. After the comparison processing is performed, the current accumulated charge value Q1 at this time is written into the last accumulated charge value Q2, the updated last accumulated charge value Q2 is used for next judgment, and then a power-off maintaining charge value Q4 for correcting the self-powered neutron detector is output, wherein the power-off maintaining charge value Q4 at this time is the sum of the zero-clearing accumulated charge value Q3 and the current accumulated charge value Q1.
According to the method for maintaining the accumulated charge in the nuclear power station reactor core in the power outage, the zero clearing accumulated charge value is determined through the received current accumulated charge value and the current stored last accumulated charge value based on the actual condition of neutron flux in the nuclear power station reactor core, and then the power outage maintaining charge value for correcting the self-powered neutron detector is determined, so that after the abnormal condition of a reactor core neutron flux signal processing cabinet occurs, transmitted accumulated charge data are not cleared by mistake, accumulated charge key data for the self-powered neutron detector are still saved, and deviation of reactor core reconstruction is avoided.
As shown in fig. 4, an embodiment of the present invention further provides a nuclear power plant core measurement accumulated charge outage maintenance system, including:
the accumulated charge receiving module 200 is configured to receive a current accumulated charge value that is currently transmitted by the neutron flux signal processing cabinet in the core;
a first charge value determining module 202, configured to determine a clear accumulated charge value according to a current accumulated charge value and a current stored last accumulated charge value, where the last accumulated charge value is a last accumulated charge value sent by a neutron flux signal processing cabinet in the core in the last time;
the second charge value determining module 204 is configured to determine a power-off hold charge value according to the clear accumulated charge value and the current accumulated charge value.
In one embodiment of the present invention, the first charge value determining module 202 includes:
the charge value comparison module is used for comparing the current accumulated charge value with the current stored last accumulated charge value;
the first charge value sub-determining module is used for taking the current accumulated charge value as a zero clearing accumulated charge value if the difference value between the current accumulated charge value and the last accumulated charge value is in a preset charge difference value range;
the second charge value sub-determining module is used for setting the zero clearing accumulated charge value as a preset charge value if the difference value between the current accumulated charge value and the last accumulated charge value is not in a preset charge difference value range.
In one embodiment of the present invention, the predetermined charge difference range is greater than or equal to 1mC, and the predetermined charge value is 0.
In one embodiment of the present invention, the system further comprises: and the charge value updating module is used for taking the current accumulated charge value as the last accumulated charge value stored recently.
In an embodiment of the present invention, the second charge value determining module 204 is further configured to add and sum the cleared accumulated charge value and the current accumulated charge value to obtain the power-off maintaining charge value.
It should be noted that the explanation of the embodiment of the method for maintaining the measured accumulated charge outage of the nuclear power plant core is also applicable to the system for maintaining the measured accumulated charge outage of the nuclear power plant core of this embodiment, and will not be repeated here.
According to the nuclear power station reactor core measurement accumulated charge outage maintaining system provided by the embodiment of the invention, based on the actual condition of the neutron flux of the nuclear power station reactor core, the zero clearing accumulated charge value is determined through the received current accumulated charge value and the current stored last accumulated charge value, and then the outage maintaining charge value for correcting the self-powered neutron detector is determined, so that the accumulated charge data transmitted by the reactor core neutron flux signal processing cabinet under the abnormal condition is not cleared by mistake, the accumulated charge key data of the self-powered neutron detector is saved, and the occurrence of deviation of reactor core reconstruction is avoided.
The foregoing examples only illustrate preferred embodiments of the invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A nuclear power plant core measurement accumulated charge outage maintenance method, comprising;
receiving a current accumulated charge value transmitted by a neutron flux signal processing cabinet in the reactor core;
determining a zero clearing accumulated charge value according to the current accumulated charge value and a current stored last accumulated charge value, wherein the last accumulated charge value is a last accumulated charge value sent by the reactor core neutron flux signal processing cabinet last time;
and determining a power-off maintaining charge value according to the clear accumulated charge value and the current accumulated charge value.
2. The nuclear power plant core measurement accumulated charge outage maintenance method of claim 1, wherein the determining a clear accumulated charge value from the current accumulated charge value and a current stored last accumulated charge value comprises:
comparing the current accumulated charge value with the currently stored last accumulated charge value;
if the difference value between the current accumulated charge value and the last accumulated charge value is in a preset charge difference value range, taking the current accumulated charge value as the zero clearing accumulated charge value;
and if the difference value between the current accumulated charge value and the last accumulated charge value is not in a preset charge difference value range, setting the zero clearing accumulated charge value as a preset charge value.
3. The nuclear power plant core measurement accumulated charge outage maintenance method of claim 2, wherein the preset charge difference range is greater than or equal to 1mC, and the predetermined charge value is 0.
4. The nuclear power plant core measurement accumulated charge outage maintenance method of claim 1, wherein the determining a clear accumulated charge value from the current accumulated charge value and a current stored last accumulated charge value further comprises:
the current accumulated charge value is taken as the last accumulated charge value stored last.
5. The nuclear power plant core measurement accumulated charge outage-holding method of claim 1, wherein the determining an outage-holding charge value from the clear accumulated charge value and the current accumulated charge value comprises:
and adding and summing the zero clearing accumulated charge value and the current accumulated charge value to obtain the power-off maintaining charge value.
6. A nuclear power plant core measurement accumulated charge outage maintenance system, comprising:
the accumulated charge receiving module is used for receiving a current accumulated charge value transmitted by the neutron flux signal processing cabinet in the reactor core;
the first charge value determining module is used for determining a clear accumulated charge value according to the current accumulated charge value and a current stored last accumulated charge value, wherein the last accumulated charge value is a last accumulated charge value sent by the neutron flux signal processing cabinet in the reactor core last time;
and the second charge value determining module is used for determining a power-off maintaining charge value according to the zero clearing accumulated charge value and the current accumulated charge value.
7. The nuclear power plant core measurement accumulated charge outage maintenance system of claim 6, wherein the first charge value determination module comprises:
the charge value comparison module is used for comparing the current accumulated charge value with the current accumulated charge value;
a first charge value sub-determining module, configured to take the current accumulated charge value as the zero clearing accumulated charge value if a difference value between the current accumulated charge value and the last accumulated charge value is within a preset charge difference value range;
and the second charge value sub-determining module is used for setting the zero clearing accumulated charge value as a preset charge value if the difference value between the current accumulated charge value and the last accumulated charge value is not in a preset charge difference value range.
8. The nuclear power plant core measurement accumulated charge outage maintenance system of claim 7, wherein the preset charge difference range is greater than or equal to 1mC and the predetermined charge value is 0.
9. The nuclear power plant core measurement accumulated charge outage maintenance system of claim 6, further comprising: and the charge value updating module is used for taking the current accumulated charge value as the last accumulated charge value which is stored recently.
10. The nuclear power plant core measurement accumulated charge outage-holding system of claim 6, wherein the second charge value determination module is further configured to add the clear accumulated charge value and the current accumulated charge value together to obtain the outage-holding charge value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311486111.3A CN117672569A (en) | 2023-11-08 | 2023-11-08 | Method and system for maintaining accumulated charge outage during nuclear power plant reactor core measurement |
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| CN202311486111.3A CN117672569A (en) | 2023-11-08 | 2023-11-08 | Method and system for maintaining accumulated charge outage during nuclear power plant reactor core measurement |
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