CN114485921B - Method and system for monitoring vibration of reactor equipment element - Google Patents
Method and system for monitoring vibration of reactor equipment element Download PDFInfo
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- CN114485921B CN114485921B CN202210108810.3A CN202210108810A CN114485921B CN 114485921 B CN114485921 B CN 114485921B CN 202210108810 A CN202210108810 A CN 202210108810A CN 114485921 B CN114485921 B CN 114485921B
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- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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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 monitoring vibration of a reactor equipment element, wherein an acceleration sensor is arranged at a measuring point of a loop main equipment, vibration signals of loose pieces and in-pile components are collected in real time, the vibration signals are processed by a pre-amplifier and a data collector and then are transmitted to an industrial personal computer through a network switch connected with a whole factory clock network for processing, the industrial personal computer analyzes and processes the vibration signals after clock synchronization, the vibration abnormality of the loose pieces and the vibration abnormality of the in-pile components are diagnosed, and if one or two of the vibration of the loose pieces and the vibration of the in-pile components are abnormal, alarm suppression state judgment is carried out: if the current state is an alarm inhibition state, not giving an alarm; and if the current state is a non-alarm inhibition state, carrying out corresponding alarm. The invention can monitor the vibration of the loose piece and the vibration of the components in the pile at the same time, and improves the monitoring precision while avoiding false alarm.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a method and a system for monitoring vibration of a reactor equipment element.
Background
Under the long-term continuous operation condition of the reactor pressure vessel of the nuclear power plant, because of the influence of water flow impact and vibration, some parts in the reactor pressure vessel can be loosened and fall off, and the vibration of components in the reactor can be excessive, so that the normal operation of equipment is influenced, shutdown maintenance is required, and the fallen parts even block a flow passage, so that safety accidents occur.
Along with the rapid development of the nuclear power industry, the vibration monitoring of the loosening element and the internal components of the reactor is more and more paid attention to, so that the vibration states of the loosening element and the internal components of the reactor in the pressure vessel of the reactor are accurately monitored in real time, the internal components of the loosening element and the internal components of the reactor which vibrate are serious can be found as soon as possible, the safety damage or faults of a loop system can be avoided or reduced, the economic loss of a nuclear power plant is reduced, and the method is an important guarantee for the safe operation of the nuclear power plant. For this reason, a nuclear power plant is generally provided with a loose piece monitoring and diagnosing system or a digital metal impact monitoring system, etc., and in order to ensure the working performance of the system, the software and hardware of the monitoring system need to be monitored regularly.
However, the existing loose piece and the in-pile component are monitored by adopting different systems respectively, the equipment cost is high, the occupied space is large, false alarm caused by false signals often occurs in the two systems, and the problem that the vibration monitoring precision of the loose piece and the in-pile component of the primary equipment of the loop is low exists.
In view of the foregoing, it is desirable to provide a method and system for monitoring vibration of a reactor plant component that solves the above-mentioned problems.
Disclosure of Invention
The invention aims at: the method and the system for monitoring the vibration of the reactor equipment element not only realize the simultaneous monitoring of the vibration of the loose piece and the vibration of the internal components of the reactor, but also can avoid false alarm and improve the monitoring precision.
In order to achieve the above object, the present invention provides a reactor equipment member vibration monitoring method, the equipment member including a loop main equipment release member and an in-pile member, the method comprising the steps of:
s1, establishing a loose piece vibration database and an in-pile member vibration database, analyzing state data of a nuclear power device under normal working conditions to obtain loose piece vibration baseline data and in-pile member vibration baseline data, and respectively obtaining a loose piece vibration early warning value range and an in-pile member vibration early warning value according to the loose piece vibration baseline data and the in-pile member vibration baseline data;
s2, respectively installing acceleration sensors at measuring points of the primary equipment of the loop, and acquiring vibration signals of the measuring points in real time by the acceleration sensors;
s3, converting the vibration signals acquired by the acceleration sensor from charge signals to voltage signals, and transmitting the voltage signals to the data acquisition device;
s4, collecting a voltage signal of the vibration signal, a neutron noise signal and a neutron level signal of an off-stack measurement system, a loop pressure signal of a digital instrument control system and a control rod positive movement signal of a rod control rod position system by using a data collector, and respectively converting the signals to obtain digital signals;
s5, transmitting the digital signals to a network switch accessed to a clock network of the whole factory, and transmitting the digital signals to an industrial personal computer for processing after clock synchronization is realized;
s6, the industrial personal computer analyzes and processes the vibration signals after clock synchronization to obtain loose piece vibration data and in-pile member vibration data of the measuring points, and performs loose piece vibration abnormality and in-pile member vibration abnormality diagnosis by combining neutron noise and neutron level signals, a loose piece vibration early warning numerical range and in-pile member vibration early warning values, and then performs the following steps:
if the diagnosis result shows that the vibration of the loosening element and the vibration of the internal components of the pile are not abnormal, no alarm is needed;
if the diagnosis result is that one or two of the loosening member vibration and the in-pile member vibration have abnormality and need to be alarmed, judging an alarm inhibition state: if the current state is an alarm inhibition state, not giving an alarm; and if the current state is a non-alarm inhibition state, carrying out corresponding alarm.
As an improvement of the reactor equipment element vibration monitoring method, when the alarm suppression state is judged in the step S6, if one of the pressure signal of the first loop, the positive movement signal of the control rod and the manual alarm suppression opening is met, the alarm suppression state is judged, and neither the loosening part vibration nor the in-pile component vibration is alarmed; and if the primary loop pressure signal is unchanged, the control rod positive movement signal is unchanged and the manual alarm inhibition closing is simultaneously satisfied, judging that the primary loop pressure signal is in a non-alarm inhibition state, and carrying out corresponding alarm according to the vibration abnormality of the loose piece and the vibration abnormality diagnosis result of the internal components of the pile.
As an improvement of the reactor equipment element vibration monitoring method of the present invention, the method further comprises S7: the signal analysis processing result of the S6 is sent to a display terminal, vibration information of the loose piece and the internal components of the pile is displayed, and meanwhile, the earphone is output to realize the monitoring signal sound playback function; the loosening element and internal-pile member vibration information comprises one or more of loosening element vibration data and internal-pile member vibration data of each measuring point, judging results of whether the loosening element vibration and the internal-pile member vibration are abnormal or not, and alarm inhibition states.
As an improvement of the reactor equipment element vibration monitoring method of the present invention, the step of diagnosing the vibration abnormality of the loose piece and the vibration abnormality of the internal components of the reactor in S6 includes:
the loose piece vibration baseline data comprise a calibration value, and when the difference value between the calibration value and the loose piece vibration data is not in the loose piece vibration early warning range, the loose piece vibration abnormality is judged;
and when the vibration data of the internal components of the pile is larger than the vibration early-warning value of the internal components of the pile, judging that the vibration of the internal components of the pile is abnormal.
As an improvement of the method for monitoring vibration of reactor equipment element of the present invention, the step of performing corresponding alarm in S6 is as follows: the industrial personal computer feeds back the alarm signal to the data acquisition unit through the network switch, the data acquisition unit sends the alarm signal to the alarm indication disc, the alarm indication disc executes alarm operation, and the alarm is carried out through different indication lamps.
In order to achieve the above object, the present invention also provides a reactor plant element vibration monitoring system, the plant element including a loop main plant release and an in-pile member, the system comprising:
the acceleration sensors are respectively arranged at different measuring points of the loop main equipment and are used for collecting real-time vibration signals generated by the loop main equipment release piece and the in-pile components in real time;
the pre-amplifier is connected with the acceleration sensor and used for converting a vibration signal acquired by the acceleration sensor from a charge signal to a voltage signal and transmitting the voltage signal to the data acquisition device;
the data acquisition device is connected with the pre-amplifier, and is used for acquiring a voltage signal transmitted by the pre-amplifier, neutron noise and neutron level signals provided by the off-pile measurement system, a loop pressure signal provided by the digital instrument control system and a control rod positive movement signal provided by the rod control rod position system, respectively converting the acquired signals to obtain digital signals and outputting the digital signals;
the network switch is connected with the data acquisition device; the network switch is a switch which is connected with the whole factory clock network and can realize clock synchronization, and is used for receiving the digital signals from the data collector, synchronizing the digital signals with the whole factory clock network clock and then transmitting the synchronized digital signals to the industrial personal computer;
the industrial personal computer is connected with the network switch and is used for analyzing and processing the vibration signals after clock synchronization to obtain loose piece vibration data and in-pile member vibration data of the measuring points, and the loose piece vibration abnormality and in-pile member vibration abnormality diagnosis are carried out by combining neutron noise and neutron level signals, a loose piece vibration early-warning numerical range and in-pile member vibration early-warning values; the device is also used for judging an alarm inhibition state if the diagnosis result is that one or two of the vibration of the loosening element and the vibration of the internal components of the pile are abnormal and need to be alarmed, and determining whether to send out an alarm signal according to the judgment result; and
and the alarm indication disc is used for executing alarm operation according to the alarm signal.
The reactor equipment element vibration monitoring system also comprises a display terminal and an earphone, wherein the display terminal is connected with the industrial personal computer and is used for displaying vibration information of the loosening piece and the internal components of the reactor, and the earphone is used for realizing a monitoring signal sound playback function; the loosening element and internal-pile member vibration information comprises one or more of loosening element vibration data and internal-pile member vibration data of each measuring point, judging results of whether the loosening element vibration and the internal-pile member vibration are abnormal or not, and alarm inhibition states.
As an improvement of the vibration monitoring system of the reactor equipment element of the invention, a filter is also included for reducing the interference of current, magnetic field and external noise to each hardware device.
As an improvement of the vibration monitoring system of the reactor equipment element, the measuring points of the primary loop equipment are respectively positioned on the reactor pressure vessel, the steam generator and the main pump, and the acceleration sensor is installed at the lower end socket of the reactor pressure vessel in a magnetic adsorption mode.
As an improvement of the vibration monitoring system of the reactor equipment element, the data acquisition device comprises a main control module, an acceleration module, a voltage module, a current module and a relay module, wherein the acceleration module is used for acquiring voltage signals of a plurality of acceleration sensors transmitted by a pre-amplifier, the voltage module is used for acquiring neutron noise signals and neutron level signals provided by an off-pile measurement system, the current module is used for acquiring a loop pressure signal provided by a digital instrument control system and a control rod positive movement signal provided by a rod control rod position system, the main control module is used for carrying out A/D conversion on signals acquired by the acceleration module, the voltage module and the current module, and the relay module is used for sending alarm signals fed back by an industrial personal computer to an alarm indication disc.
As an improvement of the vibration monitoring system of the reactor equipment element, the acceleration module comprises a collecting plate and an acceleration conditioning plate; the acquisition board controls A/D conversion, data waveform preprocessing and bus data communication, and the acceleration conditioning board realizes constant current source output, signal conditioning, power supply conversion and bus driving.
Compared with the prior art, the method and the system for monitoring the vibration of the reactor equipment element can monitor the vibration of the loosening element and the vibration of the internal components of the reactor at the same time, and improve the monitoring precision while avoiding false alarm.
Drawings
The method and system for monitoring vibration of reactor equipment components according to the present invention will be described in detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a flow chart of one embodiment of a method of monitoring vibration of a reactor equipment component according to the present invention.
FIG. 2 is a schematic diagram of one embodiment of alarm suppression logic in a method of monitoring vibration of a reactor equipment component according to the present invention.
FIG. 3 is a schematic diagram of one embodiment of a reactor plant component vibration monitoring system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantageous technical effects of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is presented herein for purposes of illustration only and is not intended to limit the invention.
Referring to fig. 1, the present invention provides a method for monitoring vibration of a reactor equipment component, the equipment component comprising a loop main equipment release member and an in-pile member, the method comprising the steps of:
s1, establishing a loose piece vibration database and an in-pile member vibration database, analyzing state data of the nuclear power device under normal working conditions to obtain loose piece vibration baseline data and in-pile member vibration baseline data, and respectively obtaining a loose piece vibration early warning value range and an in-pile member vibration early warning value according to the loose piece vibration baseline data and the in-pile member vibration baseline data.
Specifically, the loose piece vibration database and the in-pile member vibration database comprise statistical data obtained by performing excitation vibration tests on the reactor pressure vessel for a plurality of times and collecting loose piece falling vibration signals and in-pile member vibration signals received by the acceleration sensor of the measuring point.
The loose piece vibration baseline data comprise a calibration value and a normal state value, the normal state value is selected from state data under the normal working condition of the nuclear power device, the number of the normal state values is multiple, the difference value between each normal state value and the calibration value is calculated, and the loose piece vibration early warning value range is obtained according to the difference value.
The vibration early-warning value of the in-pile member can be determined according to related data in the vibration baseline data of the in-pile member, industry experience and other prior art means, and the vibration early-warning value of the in-pile member refers to a specific numerical value.
S2, respectively installing acceleration sensors at the measuring points of the primary equipment of the loop, and acquiring vibration signals of the measuring points in real time by the acceleration sensors.
Specifically, the primary loop equipment comprises a reactor pressure vessel, a steam generator and a main pump, wherein acceleration sensors are respectively arranged on measuring points of the reactor pressure vessel, the steam generator and the main pump, and vibration signals acquired by the acceleration sensors are real-time vibration signals generated by a loop primary loop equipment loosening piece and a pile inner member.
Specifically, in step S2, the measurement points of the primary loop equipment are demonstrated and analyzed from three aspects of mass estimation principle, signal attenuation and sensor disassembly, and the measurement point arrangement schemes at the positions of the primary pump, the reactor pressure vessel, the steam generator and the like are as follows: three measuring points are uniformly distributed on the circumference of the top cover of the reactor pressure vessel at 120 degrees intervals, and four measuring points are uniformly distributed on the circumference of the lower end socket at 90 degrees intervals at 1600mm diameter; three measuring points are uniformly distributed at 120-degree intervals on the circumference of the middle part of the steam generator cylinder assembly, and three measuring points are uniformly distributed at 120-degree intervals on the circumference of the lower seal head; two measuring points are circumferentially arranged at 180 degrees in the middle of the main pump shell; the measuring points at other positions are arranged according to the existing measuring point arrangement scheme, and are not repeated here. The measuring point arrangement scheme can cover all primary equipment of a loop, at least 2 measuring points are arranged at the same primary equipment, the monitoring precision can be guaranteed through an algorithm, wherein a magnetic sensor is adopted at the bottom of a reactor pressure vessel, and the accessibility of the sensor in disassembly, assembly and maintenance in a long-distance narrow space is guaranteed.
S3, converting the vibration signals acquired by the acceleration sensor from charge signals to voltage signals, and transmitting the voltage signals to the data acquisition device.
Specifically, each acceleration sensor is connected with a pre-amplifier, and the pre-amplifier converts vibration signals acquired by the acceleration sensor from charge signals to voltage signals and transmits the voltage signals to the data acquisition device.
S4, collecting a voltage signal of the vibration signal, a neutron noise signal (-5V) and a neutron level signal (0-10V) provided by an off-stack nuclear detection system (NIS), a loop pressure signal (4-20 mA) provided by a digital instrument control system (DCS), a control rod positive movement signal (4-20 mA) provided by a rod control rod position system (DRS) by using a data collector, and respectively performing conversion processing (A/D conversion) on the collected signals to obtain digital signals.
S5, transmitting the digital signals to a network switch connected to a clock network of the whole factory, and transmitting the digital signals to an industrial personal computer for processing after clock synchronization is realized.
Specifically, the network switch is a switch which is connected to the whole factory clock network and can realize clock synchronization, the network switch receives the digital signals from the data collector, and the digital signals are transmitted to the industrial personal computer after clock synchronization with the whole factory clock network, so that the real-time performance and accuracy of vibration monitoring can be ensured.
S6, the industrial personal computer analyzes and processes the vibration signals after the clock synchronization to obtain loose piece vibration data and in-pile component vibration data of the measuring points, and the loose piece vibration abnormality and in-pile component vibration abnormality diagnosis are carried out by combining neutron noise and neutron level signals, a loose piece vibration early warning numerical range and in-pile component vibration early warning values, and then the following steps are carried out:
if the diagnosis result shows that the vibration of the loosening element and the vibration of the internal components of the pile are not abnormal, no alarm is needed;
if the diagnosis result is that one or two of the loosening member vibration and the in-pile member vibration have abnormality and need to be alarmed (namely, the monitoring data reach the alarm condition), judging an alarm inhibition state: if the current state is an alarm inhibition state, not giving an alarm; and if the current state is a non-alarm inhibition state, carrying out corresponding alarm.
Specifically, the inventor researches and discovers that false signals can be caused to cause false alarms in some experimental stacks during normal operation, and in order to avoid false alarms, alarm suppression logic is designed during the process of monitoring the release piece of the primary equipment and vibration of components in the stacks, and the false signals caused by normal operation are automatically suppressed through the alarm suppression logic. The alarm suppression logic needs to consider the general judgment criterion for detecting the collision and the special criterion for compensating the inherent background noise of each sensor at different operating conditions and different positions, and the alarm suppression conditions are as follows:
(1) When the reactor main pump is started or stopped, false signals are caused to cause false alarm, so that the invention judges the start and stop actions of the main pump by introducing a loop pressure signal change, thereby starting/closing alarm inhibition;
(2) When the control rod assembly moves (the control rod is plugged in or pulled out), false signals are caused to cause false alarm, so that the invention judges the movement condition of the control rod assembly by introducing whether the positive movement signal of the control rod changes or not, thereby starting/closing alarm inhibition;
(3) In special cases, false alarm can be caused by abnormality of data of certain measuring points, such as signal distortion and the like acquired by the damage of an acceleration sensor, so the invention also sets manual alarm suppression, and a user can perform a manual alarm suppression function on a specific measuring point through selecting the measuring point, namely alarm suppression on/off, in a system alarm suppression interface, and if the alarm suppression function is on, all alarm information of the measuring point is suppressed.
Therefore, when the alarm suppression state is judged in the step S6, if one of the three conditions of the change of the loop pressure signal, the change of the positive movement signal of the control rod and the manual alarm suppression opening is met, the alarm suppression state is judged, and neither the loosening part vibration nor the in-pile component vibration is alarmed; if the pressure signal of the loop is unchanged, the positive movement signal of the control rod is unchanged and the manual alarm inhibition closing is simultaneously satisfied, judging that the control rod is in a non-alarm inhibition state, and correspondingly alarming according to the vibration abnormality of the loose piece and the vibration abnormality diagnosis result of the internal components of the pile. It is to be understood that the above three alarm suppression conditions are not required in order, and may be performed in the order shown in fig. 2, or may be performed in other orders.
Specifically, the mode of performing the corresponding alarm in S6 is to perform the alarm on the alarm indication disc through different indication lamps. For example, after the monitoring system cabinet is powered on, the power indicator light is green and normally bright; after the special monitoring system of the main equipment is started, the normal indicator lamps of the system are always on, and when an alarm is monitored, the relay module is controlled to output through alarm logic in the system, so that different indicator lamps are displayed.
Specifically, the industrial personal computer feeds back the alarm signal to the data acquisition unit through the network switch, the data acquisition unit sends the alarm signal to the alarm indication disc, and the alarm indication disc executes alarm operation.
Specifically, in step S6, the step of diagnosing vibration abnormality of the loose piece and vibration abnormality of the in-pile member includes:
when the difference value between the calibration value of the loose piece vibration baseline data and the loose piece vibration data is not in the loose piece vibration early warning range, judging that the loose piece vibration is abnormal;
and when the vibration data of the internal components of the pile is larger than the vibration early-warning value of the internal components of the pile, judging that the vibration of the internal components of the pile is abnormal. In an embodiment, the loosening vibration data and the in-stack member vibration data are each a specific value.
Preferably, the invention further comprises S7, the signal analysis processing result of S6 is sent to a display terminal, vibration information of the loose piece and the internal components is displayed, and meanwhile, the earphone is output to realize the monitoring signal sound playback function. In addition, according to the user demand, the industrial personal computer can control the printer through the network switch to realize the relevant analysis report and statistical data printing function.
Specifically, the loosening element and internal-pile member vibration information may include loosening element vibration data and internal-pile member vibration data of each measuring point, loosening element vibration abnormality, internal-pile member vibration abnormality diagnosis results, alarm suppression conditions, and the like. The display terminal can be specifically a KVM terminal, and an operator can observe the loosening piece of the loop main equipment and the vibration state of the components in the pile in real time according to the KVM terminal, and if the loosening piece and the vibration of the components in the pile greatly influence the normal operation of the loop main equipment, the operations such as shutdown maintenance and the like can be performed.
Referring to fig. 3, the present invention provides a reactor plant element vibration monitoring system, the plant element including a loop main plant trip and an in-stack component, the system comprising:
the acceleration sensors are respectively arranged at different measuring points of the loop main equipment and are used for collecting real-time vibration signals generated by the loop main equipment release piece and the in-pile components in real time;
the pre-amplifier is connected with the acceleration sensor and used for converting a vibration signal acquired by the acceleration sensor from a charge signal to a voltage signal and transmitting the voltage signal to the data acquisition device;
the data acquisition device is connected with the pre-amplifier, and is used for acquiring a voltage signal transmitted by the pre-amplifier, neutron noise and neutron level signals provided by the off-pile measurement system, a loop pressure signal provided by the digital instrument control system and a control rod positive movement signal provided by the rod control rod position system, respectively converting the acquired signals to obtain digital signals and outputting the digital signals;
the network switch is connected with the data acquisition device; the network switch is a switch which is connected with the whole factory clock network and can realize clock synchronization, and is used for receiving the digital signals from the data collector, synchronizing the digital signals with the whole factory clock network clock and then transmitting the synchronized digital signals to the industrial personal computer;
the industrial personal computer is connected with the network switch and is used for analyzing and processing the vibration signals after clock synchronization to obtain loose piece vibration data and in-pile member vibration data of the measuring points, and the loose piece vibration abnormality and in-pile member vibration abnormality diagnosis are carried out by combining neutron noise and neutron level signals, a loose piece vibration early-warning numerical range and in-pile member vibration early-warning values; the device is also used for judging an alarm inhibition state if the diagnosis result is that one or two of the vibration of the loosening element and the vibration of the internal components of the pile are abnormal and need to be alarmed, and determining whether to send out an alarm signal according to the judgment result; and
and the alarm indication disc is used for executing alarm operation according to the alarm signal.
Specifically, the alarm indication disc is connected with the data acquisition device; the industrial personal computer feeds back the alarm signal to the data acquisition unit through the network switch, the data acquisition unit sends the alarm signal to the alarm indication disc, the alarm indication disc executes alarm operation, and the alarm is carried out through different indicator lamps.
Preferably, the reactor equipment element vibration monitoring system further comprises a display terminal and an earphone, wherein the display terminal and the earphone are connected with the industrial personal computer, the display terminal is used for displaying vibration information of the loosening piece and the internal components, and the earphone is used for realizing a monitoring signal sound playback function. Specifically, the loosening element and internal-pile member vibration information may include loosening element vibration data and internal-pile member vibration data of each measuring point, a judgment result of whether the loosening element vibration and internal-pile member vibration are abnormal, an alarm suppression state, and the like. The display terminal can be specifically a KVM terminal, and an operator can observe the loosening piece of the loop main equipment and the vibration state of the components in the pile in real time according to the KVM terminal, and if the loosening piece and the vibration of the components in the pile greatly influence the normal operation of the loop main equipment, the operations such as shutdown maintenance and the like can be performed.
Preferably, the reactor equipment element vibration monitoring system further comprises a printer, wherein the printer is connected with the industrial personal computer through a network switch and is used for realizing the relevant analysis report and statistical data printing functions.
Preferably, the reactor equipment element vibration monitoring system further comprises a filter for reducing interference of current, magnetic field and external noise to each hardware device and improving monitoring precision. For example, a filter connected to a power supply may be provided, installed at the rear of the cabinet, for stabilizing the voltage; a filter for filtering the vibration signal of the acceleration sensor may be provided, allowing signals in a specific frequency band to pass therethrough, while filtering other interference noise.
Specifically, the measuring points of the primary loop equipment are respectively positioned on the reactor pressure vessel, the steam generator and the main pump, and the acceleration sensor is installed at the lower end socket of the reactor pressure vessel in a magnetic adsorption mode in consideration of the fact that the acceleration sensor needs to be replaced regularly when working in an irradiation environment, so that the maintenance and the replacement are facilitated. For example, three measuring points are uniformly distributed on the circumference of the top cover of the reactor pressure vessel at intervals of 120 degrees, and four measuring points are uniformly distributed on the circumference of the lower end socket at intervals of 90 degrees at the position of 1600mm in diameter, so as to monitor vibration signals of components in the reactor. Three measuring points are uniformly distributed at 120-degree intervals on the circumference of the middle part of the steam generator cylinder assembly, and three measuring points are uniformly distributed at 120-degree intervals on the circumference of the lower seal head; two measuring points are circumferentially arranged at 180 degrees in the middle of the main pump shell.
Specifically, the pre-amplifier is connected with the acceleration sensor through a cable; the preamplifier is arranged in the junction box at the outer side of the cabinet so as to avoid electromagnetic interference. The pre-amplifier receives the vibration signal collected by the acceleration sensor, converts the charge signal into a voltage signal and transmits the voltage signal to the data collector.
Specifically, the data collector is connected with the preamplifier through a twisted pair.
Specifically, the data acquisition device comprises a main control module, an acceleration module, a voltage module, a current module and a relay module, wherein the acceleration module is used for acquiring voltage signals of a plurality of acceleration sensors transmitted by the pre-amplifier, the voltage module is used for acquiring neutron noise signals (-5V) and neutron level signals (0-10V) provided by an off-pile measurement system, the current module is used for acquiring a loop pressure signal (4-20 mA) provided by a digital instrument control system and a control rod positive movement signal (4-20 mA) provided by a rod control rod position system, the main control module is used for carrying out A/D conversion on signals acquired by the acceleration module, the voltage module and the current module, and the relay module is used for sending alarm signals fed back by an industrial personal computer to an alarm indication disc.
Specifically, the acceleration module comprises an acquisition board and an acceleration conditioning board; the acquisition board controls A/D conversion, data waveform preprocessing and bus data communication; the acceleration conditioning plate realizes constant current source output, signal conditioning, power conversion and bus driving. Because the acceleration conditioning plate has a signal conditioning function, the conditioned acceleration sensor signal meets the amplitude and frequency spectrum requirements in the acquisition card, noise outside the required signal is filtered, a cleaner signal is obtained, and the accuracy of loose piece vibration abnormality and in-pile component vibration abnormality diagnosis can be improved.
Specifically, the network switch is a switch which is connected to a whole factory clock network and can realize clock synchronization, the whole factory clock synchronization uses a time server provided by a user as a reference, the whole set of monitoring system is connected to the whole factory clock synchronization server network, and different analysis software, processing systems and the time server are set to realize time synchronization, so that the clock synchronization function of the monitoring system is realized.
Preferably, the reactor equipment component vibration monitoring system of the present invention may further comprise a circuit breaker for power supply control and protection of each equipment. When the power supply circuit of the system fails, the circuit breaker cuts off the power supply, so that the possibility of damage of each hardware caused by circuit failure is avoided or reduced, the safety performance is improved, and the economic loss is reduced.
As can be seen from the above detailed description of the present invention, the method and system for monitoring vibration of reactor equipment element according to the present invention can monitor vibration of the loose piece and vibration of the internal components of the reactor at the same time, and improve monitoring accuracy while avoiding occurrence of false alarm.
Compared with the prior art, the method and the system for monitoring the vibration of the reactor equipment element have at least the following beneficial technical effects:
1) The loose piece vibration monitoring and the in-pile component vibration monitoring are integrated into a system, so that the equipment cost and occupied space are reduced.
2) And setting an alarm suppression condition, and automatically suppressing false signals caused by normal operation through alarm suppression logic, so that false alarms are effectively avoided.
3) The clock synchronization of the acceleration sensor signal and the whole plant signal is realized by utilizing a network switch connected with the whole plant clock network, so that the real-time performance and accuracy of vibration monitoring are ensured.
4) The acceleration conditioning plate of the data acquisition device has a signal conditioning function, the conditioned acceleration sensor signal meets the amplitude and frequency spectrum requirements in the acquisition card, noise outside the required signal is filtered, a cleaner signal is obtained, and the accuracy of loose piece vibration abnormality and in-pile component vibration abnormality diagnosis can be improved.
5) A filter is arranged in a cabinet of the monitoring system, so that interference of current, magnetic field and external noise to each hardware device is reduced, and the monitoring precision is improved.
6) The acceleration sensor is installed in a magnetic adsorption mode on the lower end socket of the reactor pressure vessel, so that the reactor pressure vessel is convenient to maintain and replace.
Modifications and variations of the above embodiments will be apparent to those skilled in the art in light of the above teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (10)
1. A method of vibration monitoring of a reactor plant element, said plant element including a loop main plant trip and internals, said method comprising the steps of:
s1, establishing a loose piece vibration database and an in-pile member vibration database, analyzing state data of a nuclear power device under normal working conditions to obtain loose piece vibration baseline data and in-pile member vibration baseline data, and respectively obtaining a loose piece vibration early warning value range and an in-pile member vibration early warning value according to the loose piece vibration baseline data and the in-pile member vibration baseline data;
s2, respectively installing acceleration sensors at measuring points of the primary equipment of the loop, and acquiring vibration signals of the measuring points in real time by the acceleration sensors;
s3, converting the vibration signals acquired by the acceleration sensor from charge signals to voltage signals, and transmitting the voltage signals to the data acquisition device;
s4, collecting a voltage signal of the vibration signal, a neutron noise signal and a neutron level signal of an off-stack measurement system, a loop pressure signal of a digital instrument control system and a control rod positive movement signal of a rod control rod position system by using a data collector, and respectively converting the signals to obtain digital signals;
s5, transmitting the digital signals to a network switch accessed to a clock network of the whole factory, and transmitting the digital signals to an industrial personal computer for processing after clock synchronization is realized;
s6, the industrial personal computer analyzes and processes the vibration signals after clock synchronization to obtain loose piece vibration data and in-pile member vibration data of the measuring points, and performs loose piece vibration abnormality and in-pile member vibration abnormality diagnosis by combining neutron noise and neutron level signals, a loose piece vibration early warning numerical range and in-pile member vibration early warning values, and then performs the following steps:
if the diagnosis result shows that the vibration of the loosening element and the vibration of the internal components of the pile are not abnormal, no alarm is needed;
if the diagnosis result is that one or two of the loosening member vibration and the in-pile member vibration have abnormality and need to be alarmed, judging an alarm inhibition state: if the pressure signal of the primary loop changes, the positive movement signal of the control rod changes and the manual alarm inhibition opening meets one of the pressure signal, the primary loop and the positive movement signal of the control rod, the primary loop and the manual alarm inhibition opening are judged to be in an alarm inhibition state, and neither the loosening part vibration nor the in-pile component vibration is alarmed; and if the primary loop pressure signal is unchanged, the control rod positive movement signal is unchanged and the manual alarm inhibition closing is simultaneously satisfied, judging that the primary loop pressure signal is in a non-alarm inhibition state, and carrying out corresponding alarm according to the vibration abnormality of the loose piece and the vibration abnormality diagnosis result of the internal components of the pile.
2. The reactor plant element vibration monitoring method according to claim 1, characterized in that the method further comprises S7: the signal analysis processing result of the S6 is sent to a display terminal, vibration information of the loose piece and the internal components of the pile is displayed, and meanwhile, the earphone is output to realize the monitoring signal sound playback function; the loosening element and internal-pile member vibration information comprises one or more of loosening element vibration data and internal-pile member vibration data of each measuring point, judging results of whether the loosening element vibration and the internal-pile member vibration are abnormal or not, and alarm inhibition states.
3. The reactor equipment member vibration monitoring method according to claim 1, wherein the step of diagnosing the loose piece vibration abnormality and the in-pile member vibration abnormality in S6 includes:
the loose piece vibration baseline data comprise a calibration value, and when the difference value between the calibration value and the loose piece vibration data is not in the loose piece vibration early warning range, the loose piece vibration abnormality is judged;
and when the vibration data of the internal components of the pile is larger than the vibration early-warning value of the internal components of the pile, judging that the vibration of the internal components of the pile is abnormal.
4. The method for monitoring vibration of a reactor plant element according to claim 1, wherein the step of performing a corresponding alarm in S6 comprises: the industrial personal computer feeds back the alarm signal to the data acquisition unit through the network switch, the data acquisition unit sends the alarm signal to the alarm indication disc, the alarm indication disc executes alarm operation, and the alarm is carried out through different indication lamps.
5. A reactor equipment component vibration monitoring system, the equipment component including a loop main equipment trip and internals, the system comprising:
the acceleration sensors are respectively arranged at different measuring points of the loop main equipment and are used for collecting real-time vibration signals generated by the loop main equipment release piece and the in-pile components in real time;
the pre-amplifier is connected with the acceleration sensor and used for converting a vibration signal acquired by the acceleration sensor from a charge signal to a voltage signal and transmitting the voltage signal to the data acquisition device;
the data acquisition device is connected with the pre-amplifier, and is used for acquiring a voltage signal transmitted by the pre-amplifier, neutron noise and neutron level signals provided by the off-pile measurement system, a loop pressure signal provided by the digital instrument control system and a control rod positive movement signal provided by the rod control rod position system, respectively converting the acquired signals to obtain digital signals and outputting the digital signals;
the network switch is connected with the data acquisition device; the network switch is a switch which is connected with the whole factory clock network and can realize clock synchronization, and is used for receiving the digital signals from the data collector, synchronizing the digital signals with the whole factory clock network clock and then transmitting the synchronized digital signals to the industrial personal computer;
the industrial personal computer is connected with the network switch and is used for analyzing and processing the vibration signals after clock synchronization to obtain loose piece vibration data and in-pile member vibration data of the measuring points, and the loose piece vibration abnormality and in-pile member vibration abnormality diagnosis are carried out by combining neutron noise and neutron level signals, a loose piece vibration early-warning numerical range and in-pile member vibration early-warning values; the control rod is also used for judging an alarm suppression state if the diagnosis result shows that one or two of the loosening member vibration and the in-pile member vibration have abnormality and need to alarm, and judging whether an alarm signal is sent out according to the judgment result, wherein when judging the alarm suppression state, if the one loop pressure signal changes, the control rod positive movement signal changes and the manual alarm suppression opening meets one of the three, judging the alarm suppression state, and neither the loosening member vibration nor the in-pile member vibration is alarmed; if the primary loop pressure signal is unchanged, the control rod positive movement signal is unchanged and the manual alarm inhibition closing is simultaneously satisfied, judging that the primary loop pressure signal is in a non-alarm inhibition state, and correspondingly alarming according to the vibration abnormality of the loose piece and the vibration abnormality diagnosis result of the internal components of the pile; and
and the alarm indication disc is used for executing alarm operation according to the alarm signal.
6. The reactor equipment component vibration monitoring system of claim 5, further comprising a display terminal and an earphone connected to the industrial personal computer, the display terminal for displaying vibration information of the release member and the in-pile member, the earphone for realizing a monitoring signal sound playback function; the loosening element and internal-pile member vibration information comprises one or more of loosening element vibration data and internal-pile member vibration data of each measuring point, judging results of whether the loosening element vibration and the internal-pile member vibration are abnormal or not, and alarm inhibition states.
7. The reactor plant element vibration monitoring system of claim 5, further comprising a filter for reducing interference of current, magnetic field and external noise to the hardware devices.
8. The vibration monitoring system of the reactor equipment component according to claim 5, wherein the measuring points of the primary loop equipment are respectively located on the reactor pressure vessel, the steam generator and the main pump, and the acceleration sensor is installed at the lower end enclosure of the reactor pressure vessel in a magnetic adsorption manner.
9. The vibration monitoring system of reactor equipment components according to claim 5, wherein the data acquisition device comprises a main control module, an acceleration module, a voltage module, a current module and a relay module, wherein the acceleration module is used for acquiring voltage signals of a plurality of acceleration sensors transmitted by the pre-amplifier, the voltage module is used for acquiring neutron noise signals and neutron level signals provided by the off-pile measurement system, the current module is used for acquiring a loop pressure signal provided by the digital instrument control system and a control rod positive movement signal provided by the rod position system, the main control module is used for performing A/D conversion on signals acquired by the acceleration module, the voltage module and the current module, and the relay module is used for sending alarm signals fed back by the industrial personal computer to the alarm indication disc.
10. The reactor plant element vibration monitoring system of claim 9, wherein the acceleration module comprises a collection plate and an acceleration conditioning plate; the acquisition board controls A/D conversion, data waveform preprocessing and bus data communication, and the acceleration conditioning board realizes constant current source output, signal conditioning, power supply conversion and bus driving.
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