CN111739668A - Method, device, equipment and medium for monitoring quadrant power tilt ratio of nuclear power station reactor core - Google Patents

Method, device, equipment and medium for monitoring quadrant power tilt ratio of nuclear power station reactor core Download PDF

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CN111739668A
CN111739668A CN202010612273.7A CN202010612273A CN111739668A CN 111739668 A CN111739668 A CN 111739668A CN 202010612273 A CN202010612273 A CN 202010612273A CN 111739668 A CN111739668 A CN 111739668A
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quadrant
power
response current
target
ratio
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王瑞
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National Nuclear Demonstration Power Plant Co ltd
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National Nuclear Demonstration Power Plant Co ltd
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/001—Computer implemented control
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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Abstract

The invention discloses a method, a device, equipment and a medium for monitoring quadrant power tilt ratio of a nuclear power station reactor core. The method comprises the following steps: aiming at each quadrant of a nuclear power station reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector; calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients; and calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition. By using the technical scheme of the invention, the quadrant power inclination ratio of the nuclear power station reactor core can be rapidly, timely and accurately monitored.

Description

Method, device, equipment and medium for monitoring quadrant power tilt ratio of nuclear power station reactor core
Technical Field
The embodiment of the invention relates to a nuclear power monitoring technology, in particular to a method, a device, equipment and a medium for monitoring the quadrant power tilt ratio of a nuclear power station reactor core.
Background
The quadrant power tilt ratio of the reactor core is the ratio of the average power of a certain quadrant of the reactor core to the average power of the whole reactor core, and is an index for measuring the radial power distribution asymmetry of the reactor core. For safety reasons, it is necessary to ensure that the quadrant power tilt ratio does not exceed a preset limit, and therefore, the quadrant power tilt ratio needs to be monitored.
In the prior art, quadrant power is mainly detected through an out-of-core detector so as to calculate a quadrant power inclination ratio, or the quadrant power inclination ratio is calculated through core thermocouple monitoring, or the quadrant power inclination ratio is monitored through a power-on diagram. In the process of implementing the invention, the inventor finds that the prior art has the following defects: the monitoring precision is low by monitoring the quadrant power tilt ratio by the off-stack detector, and the influence of the object limited power tilt ratio is large when the calibration parameters are modified; the method for monitoring the quadrant power tilt ratio by the reactor core thermocouple has low monitoring precision and slow response speed; the mode of monitoring the quadrant power inclination ratio through the electrifying diagram is an off-line monitoring mode, and the quadrant power inclination ratio of the reactor core cannot be monitored in time.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a medium for monitoring the quadrant power inclination ratio of a nuclear power station reactor core, so as to realize the rapid, timely and accurate monitoring of the quadrant power inclination ratio of the nuclear power station reactor core.
In a first aspect, an embodiment of the present invention provides a method for monitoring a quadrant power inclination ratio of a nuclear power plant core, where the method includes:
aiming at each quadrant of a nuclear power station reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector;
calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
In a second aspect, an embodiment of the present invention further provides a device for monitoring a quadrant power inclination ratio of a nuclear power plant core, where the device includes:
the data acquisition module is used for acquiring multiple groups of upper weighted power and lower weighted power through the in-reactor detector and acquiring multiple groups of upper response current and lower response current in real time through the out-of-reactor detector aiming at each quadrant of the reactor core of the nuclear power station;
the quadrant power calculation module is used for calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating the quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and the quadrant power inclination ratio calculation module is used for calculating the quadrant power inclination ratio of the nuclear power station reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power station reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
In a third aspect, an embodiment of the present invention further provides a computer apparatus, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the program to implement the method for monitoring quadrant power tilt ratio of a nuclear power plant core according to any one of the embodiments of the present invention.
In a fourth aspect, embodiments of the present invention further provide a storage medium containing computer executable instructions, which when executed by a computer processor, are used to perform the method for monitoring quadrant power tilt ratio of a nuclear power plant core as described in any one of the embodiments of the present invention.
According to the embodiment of the invention, a plurality of groups of upper weighted power and lower weighted power of each quadrant are obtained by detecting an in-core detector, a plurality of groups of upper response current and lower response current of each quadrant are obtained by detecting an out-of-core detector, the coupling coefficient of each quadrant is calculated according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, so that the quadrant power of each quadrant is calculated, the quadrant power tilt ratio is calculated according to each quadrant power, and the reactor core of the nuclear power station is pre-warned when the quadrant power tilt ratio does not meet the condition of the normal tilt ratio. The problem of among the prior art quadrant power slope ratio's monitoring mode, the monitoring precision is low, and response speed is slow, the timeliness is poor is solved, quick, timely, accurate monitoring nuclear power station reactor core's quadrant power slope ratio's effect has been realized.
Drawings
FIG. 1 is a flow chart of a method for monitoring quadrant power inclination ratio of a nuclear power plant core according to a first embodiment of the present invention;
FIG. 2a is a flow chart of a quadrant power inclination ratio monitoring method for a nuclear power plant core according to a second embodiment of the present invention;
FIG. 2b is a method for detecting a quadrant power tilt ratio of a nuclear power plant core in a first scenario in which the present invention is specifically applied;
FIG. 3 is a schematic structural diagram of a quadrant power inclination ratio monitoring device of a nuclear power plant core in a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device in the fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for monitoring a quadrant power inclination ratio of a nuclear power plant core according to an embodiment of the present invention, where the embodiment is applicable to monitoring the quadrant power inclination ratio of the nuclear power plant core, and the method may be implemented by a device for monitoring the quadrant power inclination ratio of the nuclear power plant core, where the device may be implemented by software and/or hardware, and is generally integrated in a computer device, and may be used in combination with an in-core detector and an out-of-core detector.
As shown in fig. 1, the technical solution of the embodiment of the present invention specifically includes the following steps:
and S110, aiming at each quadrant of the nuclear power plant reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector.
The reactor core of the nuclear power plant is a part where fuel in the nuclear power plant reacts, and is divided into four quadrants. In the embodiment of the invention, for the reactor core of the nuclear power station, a plurality of in-core detectors are arranged at different positions of different quadrants, and in the xenon oscillation test, the in-core detectors can obtain the power distribution of the whole reactor core for each quadrant, so as to obtain the upper power and the lower power of each quadrant. The upper weighted power and the lower weighted power can be obtained according to the upper power and the lower power, and specifically, the upper weighted power and the lower weighted power can be obtained by a neutron transport program and calculation according to the upper power and the lower power, but the embodiment does not limit the specific manner of obtaining the upper weighted power and the lower weighted power. The xenon oscillation test is used for measuring the stability of the reactor caused by xenon oscillation, and the xenon oscillation test can be carried out on the reactor core at preset time intervals, so that the upper power and the lower power are obtained.
The reactor-outside detector is used for acquiring upper and lower response currents, and in the embodiment of the invention, the reactor-outside detector can be an reactor-outside power range detector, and the response current of the reactor-outside detector is influenced by the power of the reactor core. The upper response current is the response current detected by the upper off-stack detector, and the lower response current is the response current detected by the lower off-stack detector.
In the embodiment of the invention, a series of upper weighted power and lower weighted power, upper response current and lower response current corresponding to different quadrants of a nuclear power plant core are obtained.
And S120, calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients.
In the embodiment of the present invention, the coupling coefficient is used to indicate the degree of influence of the upper weight power or the lower weight power on the upper response current or the lower response current. The quadrant power refers to the power corresponding to a certain quadrant in the reactor core.
In the embodiment of the invention, the upper and lower response currents are influenced by the upper and lower weight powers of the reactor core quadrant, so that a plurality of coupling coefficients respectively corresponding to each quadrant can be obtained according to the upper and lower response currents, the upper and lower weight powers, and the quadrant power corresponding to each quadrant can be obtained according to the coupling coefficients and the upper and lower response currents after the coupling coefficients corresponding to each quadrant are obtained.
In an alternative embodiment of the present invention, calculating a plurality of coupling coefficients corresponding to the quadrants from the upper weight power, the lower weight power, the upper response current, and the lower response current may include: and fitting according to the multiple groups of upper weight power and lower weight power matched with the current quadrant, the multiple groups of upper response current and lower response current and a preset fitting formula to obtain multiple coupling coefficients corresponding to the current quadrant.
In the embodiment of the present invention, for the current quadrant, the relationship between the upper and lower response currents and the upper and lower weighted powers of the quadrant is as follows:
iU＝AUPU+BUPL
iL＝ALPU+BLPL
therefore, after obtaining the plurality of groups of upper weight power, lower weight power, and the plurality of groups of upper response current and lower response current, the coupling coefficient a corresponding to the current quadrant can be obtained by fitting according to a preset fitting formulaU、BU、ALAnd BL. The fitting formula is not particularly limited in the embodiments of the present invention.
In an alternative embodiment of the present invention, calculating quadrant powers respectively corresponding to the quadrants according to the coupling coefficients may include: selecting a target upper response current and a target lower response current from a plurality of groups of upper response currents and lower response currents matched with the current quadrant; according to the formula:
Figure BDA0002561161580000061
calculating quadrant power P corresponding to the current quadrantm(ii) a Wherein A isUIs the first coupling coefficient, B, corresponding to the current quadrantUIs the second coupling coefficient, A, corresponding to the current quadrantLIs the third coupling coefficient, B, corresponding to the current quadrantLIs the fourth coupling coefficient, i, corresponding to the current quadrantUIs the target upper response current, iLIs the target lower response current.
The target upper response current and the target lower response current can be one of a plurality of groups of upper response currents and lower response currents, and one group of upper response currents and one group of lower response currents which are most late in time are obtained; the target upper response current and the target lower response current may also be the upper response current and the lower response current of the current quadrant acquired in real time. The embodiment of the present invention does not limit the specific content and the obtaining manner of the target upper response current and the target lower response current.
In the embodiment of the invention, after the coupling coefficients of the quadrants are obtained, the coupling coefficients represent the relation between the upper and lower response currents obtained by the off-stack detector and the quadrant power of the quadrants, and are not influenced by the core operation condition or the fuel consumption change, so that the quadrant power of the quadrants can be obtained in real time according to the upper and lower response currents corresponding to the quadrants obtained in real time, and the real-time obtaining of the quadrant power inclination ratio is realized.
And S130, calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
The quadrant power inclination ratio is an important operating parameter representing the radial power distribution of the core, the normal inclination ratio condition is a numerical interval in which the quadrant power inclination ratio is normal, and for example, the quadrant power inclination ratio limit value is generally 1.02, so the normal inclination ratio condition may be that the quadrant power inclination ratio is less than or equal to 1.02.
In an alternative embodiment of the present invention, calculating the quadrant power inclination ratio of the nuclear power plant core according to the quadrant power corresponding to each quadrant may include: acquiring the maximum quadrant power in the quadrant power corresponding to each quadrant; and taking the ratio of the maximum quadrant power to the average value of the quadrant power corresponding to each quadrant as the quadrant power inclination ratio of the nuclear power station reactor core.
In the embodiment of the invention, the quadrant power tilt ratio is the ratio of the quadrant power maximum value of each quadrant to the quadrant power average value of each quadrant. Whether the quadrant power inclination ratio meets the normal inclination ratio condition or not is considered, early warning is carried out when the normal inclination ratio condition is not met, the balance of reactor core radial power distribution can be guaranteed, and therefore safety is improved.
According to the technical scheme, multiple groups of upper weighted power and lower weighted power of each quadrant are obtained through detection of an in-reactor detector, multiple groups of upper response current and lower response current of each quadrant are obtained through detection of an out-of-reactor detector, the coupling coefficient of each quadrant is calculated according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, accordingly, the quadrant power of each quadrant is calculated, the quadrant power inclination ratio is calculated according to each quadrant power, and early warning is conducted on the nuclear power station reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition. The problem of among the prior art quadrant power slope ratio's monitoring mode, the monitoring precision is low, and response speed is slow, the timeliness is poor is solved, quick, timely, accurate monitoring nuclear power station reactor core's quadrant power slope ratio's effect has been realized.
Example two
Fig. 2a is a flowchart of a method for monitoring a quadrant power tilt ratio of a nuclear power plant core according to a second embodiment of the present invention, where the second embodiment of the present invention adds a step of correcting an object limit power and recalculating a coupling coefficient according to updated detector data.
Correspondingly, as shown in fig. 2a, the technical solution of the embodiment of the present invention specifically includes the following steps:
s210, aiming at each quadrant of the nuclear power plant reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector.
And S220, fitting according to the multiple groups of upper weight power and lower weight power, the multiple groups of upper response current and lower response current and a preset fitting formula, which are matched with the current quadrant, to obtain multiple coupling coefficients corresponding to the current quadrant.
And S230, selecting a target upper response current and a target lower response current from the multiple groups of upper response currents and lower response currents matched with the current quadrant.
S240, according to a formula:
Figure BDA0002561161580000081
calculating quadrant power P corresponding to the current quadrantm。
And S250, acquiring the maximum quadrant power in the quadrant power corresponding to each quadrant.
And S260, taking the ratio of the maximum quadrant power to the average value of the quadrant power corresponding to each quadrant as the quadrant power inclination ratio of the nuclear power plant reactor core.
And S270, judging whether the quadrant power tilt ratio meets a normal tilt ratio condition, if so, executing S290, otherwise, executing S280.
And S280, early warning is carried out on the nuclear power plant reactor core.
And S290, judging whether the condition of the correction time is met or not, if so, executing S2100, otherwise, executing S290.
The target power may be calibrated at preset time intervals, and correspondingly, the correction time condition may be whether the last quadrant power calibration has reached the preset time interval.
And S2100, calculating target weight powers respectively corresponding to the quadrants according to the target upper weight power and the target lower weight power of the quadrants.
The target upper weighted power and the target lower weighted power may be upper and lower weighted powers of each quadrant obtained when flux map measurement is performed on the core when the correction time condition is satisfied. The flux map measurement is one method of measuring the reactor core power distribution. The target weight power is a sum of the target upper weight power and the target lower weight power.
S2110, judging whether the difference value between the target weight power of at least one target quadrant and the matched quadrant power is smaller than or equal to a preset difference value, if so, executing S2120, and otherwise, executing S2140.
In the embodiment of the invention, when the difference between the target weight power of the target quadrant and the calculated quadrant power is smaller, the explanation error is smaller, and the quadrant power of the target quadrant is corrected. When the difference between the target weight power of the target quadrant and the calculated quadrant power is large, the explanation error is large, and the coupling coefficient needs to be calculated again, so that the quadrant power inclination ratio of the reactor core can be calculated in real time according to the new coupling coefficient.
And S2120, correcting the quadrant power of the target quadrant according to the correction coefficient.
In an optional embodiment of the present invention, modifying the quadrant power of the target quadrant according to the modification coefficient may include: correcting the quadrant power of the target quadrant according to the following formula:
Pm′＝α*Pm
wherein, Pm' is the quadrant power of the target quadrant after correction, and α is the correction coefficient corresponding to the target quadrant.
The correction coefficient may be a preset coefficient, and the quadrant power of the target quadrant is adjusted by the preset coefficient.
And S2130, recalculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the correction result.
After the quadrant power of the target quadrant is adjusted, the quadrant power tilt ratio needs to be recalculated, and the condition of the normal tilt ratio needs to be judged again.
S2140, recalculating the coupling coefficient according to the multiple sets of upper weighted power and lower weighted power matched with the target quadrant and the multiple sets of upper response current and lower response current, and recalculating the quadrant power tilt ratio of the nuclear power plant core according to the new coupling coefficient.
In the embodiment of the invention, the difference between the target weight power of the target quadrant and the calculated quadrant power is large, and the quadrant power of the target quadrant is calculated according to the existing coupling coefficient, so that the quadrant power tilt ratio of the reactor core is determined, the accuracy of the obtained quadrant power tilt ratio is reduced, the coupling coefficient needs to be recalculated, the calibration of the quadrant power is realized, and the accuracy of the calculation of the quadrant power tilt ratio is improved.
In the embodiment of the invention, multiple groups of upper weighted power and lower weighted power matched with the target quadrant and multiple groups of upper response current and lower response current can be obtained again, a new coupling coefficient is calculated, the quadrant power of the target quadrant is recalculated according to the new coupling coefficient, and the quadrant power tilt ratio is determined again according to the new quadrant power of the target quadrant.
According to the technical scheme of the embodiment, a plurality of groups of upper weighted power and lower weighted power of each quadrant are obtained through detection of an in-core detector, a plurality of groups of upper response current and lower response current of each quadrant are obtained through detection of an out-of-core detector, a coupling coefficient of each quadrant is calculated according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, quadrant power of each quadrant is calculated, a quadrant power inclination ratio is calculated according to each quadrant power, when the quadrant power inclination ratio does not meet a normal inclination ratio condition, early warning is conducted on a nuclear power station reactor core, when the difference between the calculated quadrant power and the calculated weighted power is small, an object limit power is corrected, and when the difference between the calculated quadrant power and the calculated weighted power is large, the coupling coefficient is recalculated. According to the technical scheme, the quadrant power is calculated through the current obtained by detecting the out-of-core detector, the correction and parameter adjustment of the quadrant power are realized, the problems of low monitoring precision, low response speed and poor timeliness of a monitoring mode of the quadrant power tilt ratio in the prior art are solved, and the effect of quickly, timely and accurately monitoring the quadrant power tilt ratio of the nuclear power station reactor core is realized.
Specific application scenario 1
Fig. 2b is a method for detecting a quadrant power tilt ratio of a core of a nuclear power plant according to a first specific application scenario of the present invention, as shown in fig. 2b, the method includes:
and S1, for each quadrant of the nuclear power plant reactor core, obtaining multiple groups of upper weighted power and lower weighted power through a xenon oscillation test, and obtaining multiple groups of upper response current and lower response current detected by an out-of-core detector.
And S2, fitting according to the multiple groups of upper weight power and lower weight power and the multiple groups of upper response current and lower response current to obtain the coupling coefficient corresponding to each quadrant.
And S3, calculating to obtain quadrant power corresponding to each quadrant according to the coupling coefficient corresponding to each quadrant and the target upper response current and the target lower response current selected from the multiple groups of upper response currents and lower response currents of each quadrant.
And S4, taking the ratio of the maximum value of the quadrant power corresponding to each quadrant to the average value of the quadrant power corresponding to each quadrant as the quadrant power tilt ratio.
And S5, judging whether the correction time condition is met, if so, executing S6, otherwise, executing S5.
And S6, carrying out flux map measurement on the nuclear power plant reactor core, and obtaining the target weight power of each quadrant obtained by flux map measurement.
S7, judging whether the difference between the target weight power of the target quadrant and the matched quadrant power is smaller than or equal to a preset difference, if so, executing S8, otherwise, executing S9.
And S8, correcting the quadrant power of the target quadrant according to the correction coefficient, and recalculating the quadrant power tilt ratio according to the correction result.
And S9, obtaining a plurality of groups of upper weight power and lower weight power according to a xenon oscillation test, and a plurality of groups of upper response current and lower response current obtained by detection of an off-stack detector, recalculating the coupling coefficient of the target quadrant, calculating the quadrant power of the target quadrant according to the new coupling coefficient, and recalculating the quadrant power tilt ratio according to the new quadrant power.
And S10, judging whether the processing of all quadrants is finished, if so, executing S5, and otherwise, executing S7.
According to the technical scheme of the embodiment, a plurality of groups of upper weighted power and lower weighted power of each quadrant are obtained through detection of an in-pile detector, a plurality of groups of upper response current and lower response current of each quadrant are obtained through detection of an out-of-pile detector, a coupling coefficient of each quadrant is calculated according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, quadrant power of each quadrant is calculated, a quadrant power tilt ratio is calculated according to the quadrant power, the target limited power can be corrected when the difference between the calculated quadrant power and the weighted power is small, and the coupling coefficient is recalculated when the difference between the calculated quadrant power and the weighted power is large. According to the technical scheme, the quadrant power is calculated through the current obtained by detecting the out-of-core detector, the correction and parameter adjustment of the quadrant power are realized, the problems of low monitoring precision, low response speed and poor timeliness of a monitoring mode of the quadrant power tilt ratio in the prior art are solved, and the effect of quickly, timely and accurately monitoring the quadrant power tilt ratio of the nuclear power station reactor core is realized.
EXAMPLE III
Fig. 3 is a schematic structural diagram of a quadrant power inclination ratio monitoring device for a nuclear power plant core according to a third embodiment of the present invention, which can be implemented by software and/or hardware, and is generally integrated in a computer device, and can be used in cooperation with an in-core detector and an out-of-core detector. The device includes: a data acquisition module 310, a quadrant power calculation module 320, and a quadrant power tilt ratio calculation module 330. Wherein:
the data acquisition module 310 is configured to acquire, for each quadrant of a reactor core of the nuclear power plant, multiple sets of upper weighted power and lower weighted power through an in-reactor detector, and multiple sets of upper response current and lower response current through an out-of-reactor detector in real time;
a quadrant power calculating module 320, configured to calculate a plurality of coupling coefficients corresponding to the quadrants, respectively, according to the upper weighted power, the lower weighted power, the upper response current, and the lower response current, and calculate quadrant powers corresponding to the quadrants, respectively, according to the coupling coefficients;
and the quadrant power inclination ratio calculation module 330 is configured to calculate a quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power corresponding to each quadrant, and perform early warning on the nuclear power plant reactor core when the quadrant power inclination ratio does not meet a normal inclination ratio condition.
According to the technical scheme, multiple groups of upper weighted power and lower weighted power of each quadrant are obtained through detection of an in-reactor detector, multiple groups of upper response current and lower response current of each quadrant are obtained through detection of an out-of-reactor detector, the coupling coefficient of each quadrant is calculated according to the upper weighted power, the lower weighted power, the upper response current and the lower response current, accordingly, the quadrant power of each quadrant is calculated, the quadrant power inclination ratio is calculated according to each quadrant power, and early warning is conducted on the nuclear power station reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition. The problem of among the prior art quadrant power slope ratio's monitoring mode, the monitoring precision is low, and response speed is slow, the timeliness is poor is solved, quick, timely, accurate monitoring nuclear power station reactor core's quadrant power slope ratio's effect has been realized.
On the basis of the above embodiment, the quadrant power calculation module 320 includes:
and the coupling coefficient acquisition unit is used for fitting to obtain a plurality of coupling coefficients corresponding to the current quadrant according to the plurality of groups of upper and lower weight powers matched with the current quadrant, the plurality of groups of upper and lower response currents and a preset fitting formula.
On the basis of the above embodiment, the quadrant power calculation module 320 includes:
the target upper and lower response current acquisition unit is used for selecting a target upper response current and a target lower response current from a plurality of groups of upper response currents and lower response currents matched with the current quadrant;
a quadrant power calculation unit for calculating a quadrant power value according to the formula:
Figure BDA0002561161580000141
calculating quadrant power P corresponding to the current quadrantm；
Wherein A isUIs the first coupling coefficient, B, corresponding to the current quadrantUIs the second coupling coefficient, A, corresponding to the current quadrantLIs the third coupling coefficient, B, corresponding to the current quadrantLIs the fourth coupling coefficient, i, corresponding to the current quadrantUIs the target upper response current, iLIs the target lower response current.
On the basis of the above embodiment, the quadrant power tilt ratio calculation module 330 includes:
the maximum quadrant power acquisition unit is used for acquiring the maximum quadrant power in the quadrant power corresponding to each quadrant;
and the quadrant power inclination ratio calculation unit is used for taking the ratio of the maximum quadrant power to the average value of the quadrant power corresponding to each quadrant as the quadrant power inclination ratio of the nuclear power station reactor core.
On the basis of the above embodiment, the apparatus further includes:
the target weight power calculation module is used for calculating target weight power corresponding to each quadrant according to the target upper weight power and the target lower weight power of each quadrant when the condition that the correction time is met is detected;
the quadrant power correction module is used for correcting the quadrant power of at least one target quadrant according to a correction coefficient if the difference between the target weight power of the target quadrant and the matched quadrant power is smaller than or equal to a preset difference;
and the quadrant power inclination ratio recalculation module is used for recalculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the correction result.
On the basis of the above embodiment, the quadrant power correction module includes:
a quadrant power correction unit for correcting the quadrant power of the target quadrant according to the following formula:
Pm′＝α*Pm
wherein, Pm' is the corrected target quadrantα is the correction factor corresponding to the target quadrant.
On the basis of the above embodiment, the apparatus further includes:
and the data updating module is used for recalculating the coupling coefficient according to the multiple groups of upper weighted power and lower weighted power matched with the target quadrant and the multiple groups of upper response current and lower response current matched with the target quadrant and recalculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the new coupling coefficient if the difference value between the target weighted power of the target quadrant and the matched quadrant power is larger than a preset difference value. .
The device for monitoring the quadrant power inclination ratio of the nuclear power plant reactor core provided by the embodiment of the invention can execute the method for monitoring the quadrant power inclination ratio of the nuclear power plant reactor core provided by any embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method.
Example four
Fig. 4 is a schematic structural diagram of a computer apparatus according to a fourth embodiment of the present invention, as shown in fig. 4, the computer apparatus includes a processor 70, a memory 71, an input device 72, and an output device 73; the number of processors 70 in the computer device may be one or more, and one processor 70 is taken as an example in fig. 4; the processor 70, the memory 71, the input device 72 and the output device 73 in the computer apparatus may be connected by a bus or other means, and the connection by the bus is exemplified in fig. 4.
The memory 71 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, and modules, such as the modules corresponding to the monitoring method for the quadrant power tilt ratio of the nuclear power plant core in the embodiment of the present invention (for example, the data acquisition module 310, the quadrant power calculation module 320, and the quadrant power tilt ratio calculation module 330 in the monitoring device for the quadrant power tilt ratio of the nuclear power plant core). The processor 70 executes various functional applications of the computer device and data processing by operating software programs, instructions and modules stored in the memory 71, so as to implement the above-mentioned method for monitoring the quadrant power tilt ratio of the nuclear power plant core. The method comprises the following steps:
aiming at each quadrant of a nuclear power station reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector;
calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
The memory 71 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 71 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 71 may further include memory located remotely from the processor 70, which may be connected to a computer device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 72 may be used to receive input numeric or character information and generate key signal inputs relating to user settings and function controls of the computer apparatus. The output device 73 may include a display device such as a display screen.
EXAMPLE five
Fifth, an embodiment of the present invention further provides a storage medium containing computer-executable instructions, where the computer-executable instructions, when executed by a computer processor, are configured to perform a method for monitoring quadrant power tilt ratio of a nuclear power plant core, the method including:
aiming at each quadrant of a nuclear power station reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector;
calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
Of course, the embodiments of the present invention provide a storage medium containing computer-executable instructions, which are not limited to the operations of the method described above, but can also perform the operations related to the method for monitoring quadrant power tilt ratio of nuclear power plant core provided by any of the embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the device for monitoring the quadrant power inclination ratio of the nuclear power plant core, the units and modules included in the device are only divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A method for monitoring the quadrant power inclination ratio of a nuclear power station reactor core is characterized by comprising the following steps:
aiming at each quadrant of a nuclear power station reactor core, acquiring multiple groups of upper weighted power and lower weighted power through an in-reactor detector, and acquiring multiple groups of upper response current and lower response current in real time through an out-of-reactor detector;
calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and calculating the quadrant power inclination ratio of the nuclear power plant reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power plant reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
2. The method of claim 1, wherein calculating a plurality of coupling coefficients corresponding to quadrants from the upper weighted power, the lower weighted power, the upper response current, and the lower response current comprises:
and fitting according to the multiple groups of upper weight power and lower weight power matched with the current quadrant, the multiple groups of upper response current and lower response current and a preset fitting formula to obtain multiple coupling coefficients corresponding to the current quadrant.
3. The method of claim 1, wherein calculating quadrant powers corresponding to the quadrants, respectively, based on the coupling coefficients comprises:
selecting a target upper response current and a target lower response current from a plurality of groups of upper response currents and lower response currents matched with the current quadrant;
according to the formula:
Figure FDA0002561161570000011
calculating quadrant power P corresponding to the current quadrantm；
Wherein A isUIs the first coupling coefficient, B, corresponding to the current quadrantUIs the second coupling coefficient, A, corresponding to the current quadrantLIs the third coupling coefficient, B, corresponding to the current quadrantLIs the fourth coupling coefficient, i, corresponding to the current quadrantUIs the target upper response current, iLIs the target lower response current.
4. The method of claim 1, wherein calculating the quadrant power tilt ratio of the nuclear power plant core based on the quadrant power corresponding to each quadrant comprises:
acquiring the maximum quadrant power in the quadrant power corresponding to each quadrant;
and taking the ratio of the maximum quadrant power to the average value of the quadrant power corresponding to each quadrant as the quadrant power inclination ratio of the nuclear power station reactor core.
5. The method according to claim 4, further comprising, after calculating a quadrant power tilt ratio of the nuclear power plant core based on the quadrant power corresponding to each quadrant:
when the condition that the correction time is met is detected, calculating target weight power corresponding to each quadrant according to the target upper weight power and the target lower weight power of each quadrant;
if the difference between the target weight power of at least one target quadrant and the matched quadrant power is smaller than or equal to a preset difference, correcting the quadrant power of the target quadrant according to a correction coefficient;
and recalculating the quadrant power inclination ratio of the nuclear power plant core according to the correction result.
6. The method of claim 5, wherein modifying the quadrant power of the target quadrant according to a modification factor comprises:
correcting the quadrant power of the target quadrant according to the following formula:
Pm′＝α*Pm
wherein, Pm' is the quadrant power of the target quadrant after correction, and α is the correction coefficient corresponding to the target quadrant.
7. The method of claim 5, wherein after calculating the target weighted powers corresponding to the quadrants, the method further comprises:
and if the difference value between the target weight power of the target quadrant and the matched quadrant power is larger than a preset difference value, recalculating the coupling coefficient according to the multiple groups of upper weight power and lower weight power matched with the target quadrant and the multiple groups of upper response current and lower response current, and recalculating the quadrant power inclination ratio of the nuclear power station reactor core according to the new coupling coefficient.
8. The utility model provides a nuclear power station reactor core quadrant power slope ratio monitoring devices which characterized in that includes:
the data acquisition module is used for acquiring multiple groups of upper weighted power and lower weighted power through the in-reactor detector and acquiring multiple groups of upper response current and lower response current in real time through the out-of-reactor detector aiming at each quadrant of the reactor core of the nuclear power station;
the quadrant power calculation module is used for calculating a plurality of coupling coefficients respectively corresponding to the quadrants according to the upper weight power, the lower weight power, the upper response current and the lower response current, and calculating the quadrant power respectively corresponding to the quadrants according to the coupling coefficients;
and the quadrant power inclination ratio calculation module is used for calculating the quadrant power inclination ratio of the nuclear power station reactor core according to the quadrant power respectively corresponding to each quadrant, and early warning the nuclear power station reactor core when the quadrant power inclination ratio does not meet the normal inclination ratio condition.
9. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the nuclear power plant core quadrant power tilt ratio monitoring method as claimed in any one of claims 1 to 7.
10. A storage medium containing computer executable instructions for performing the nuclear power plant core quadrant power tilt ratio monitoring method as recited in any one of claims 1-7 when executed by a computer processor.
CN202010612273.7A 2020-06-29 2020-06-29 Method, device, equipment and medium for monitoring quadrant power tilt ratio of nuclear power station reactor core Withdrawn CN111739668A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112379318A (en) * 2020-11-04 2021-02-19 国核示范电站有限责任公司 Coefficient calibration method, device, equipment and medium for power range detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112379318A (en) * 2020-11-04 2021-02-19 国核示范电站有限责任公司 Coefficient calibration method, device, equipment and medium for power range detector
CN112379318B (en) * 2020-11-04 2022-11-08 国核示范电站有限责任公司 Coefficient calibration method, device, equipment and medium for power range detector

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