CN113270217A - Power range measuring method and device of six-section uncompensated ionization chamber - Google Patents
Power range measuring method and device of six-section uncompensated ionization chamber Download PDFInfo
- Publication number
- CN113270217A CN113270217A CN202110527792.8A CN202110527792A CN113270217A CN 113270217 A CN113270217 A CN 113270217A CN 202110527792 A CN202110527792 A CN 202110527792A CN 113270217 A CN113270217 A CN 113270217A
- Authority
- CN
- China
- Prior art keywords
- power
- section
- module
- power range
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
Abstract
The invention discloses a power range measuring method and device of a six-section uncompensated ionization chamber, relates to the measuring technology of an out-of-pile nuclear instrument system, and solves the problem of the improvement requirement of the power range measuring device of a nuclear instrument system of a second-generation and second-generation nuclear power plant. The invention adopts a power range detector to output 6-section micro-current signals to a conditioning part, the conditioning part converts the 6-section micro-current signals into 6-section frequency signals to be output to a processing part, and the processing part performs the average current calculation of the upper three sections, the average current calculation of the lower three sections, the average power calculation, the axial power deviation calculation, the fixed value comparison and the fault detection processing. The invention adopts intelligent detection means such as program control high voltage, high voltage automatic extraction, signal input channel program control selection, module fault automatic detection and the like, and improves the intelligent degree and the self-diagnosis coverage rate of the power range measuring device of the measuring system of the nuclear instrument outside the pile.
Description
Technical Field
The invention relates to a measurement technology of an out-of-pile nuclear instrument system, in particular to a power range measurement method and a power range measurement device of a six-section uncompensated ionization chamber.
Background
The reactor external nuclear instrument measuring system measures the neutron fluence rate of reactor core leakage through a series of neutron power range detectors arranged outside a reactor pressure vessel, pulse/current signals measured by the power range detectors are sent to a system protection cabinet for conditioning and processing, the continuous monitoring of the reactor power level, power change and power distribution is realized, the state information of the reactor during reactor core loading/unloading, reactor shutdown, reactor startup and power operation is provided for an operator, and the emergency reactor shutdown of the reactor is triggered when the neutron fluence rate is high and the neutron fluence rate is rapidly changed.
The power range measuring device is an important component of an out-of-reactor nuclear instrument measuring system and is used for monitoring the power level of a reactor during power operation. Along with the development of third-generation nuclear power, the nuclear instrument system outside the reactor needs to be developed and developed to meet the requirements of the nuclear instrument system of the third-generation nuclear power, cover the reactor types of ACP1000, ACP100 and the like, simultaneously give consideration to the modification requirements of the nuclear instrument systems of second-generation and second-generation nuclear power plants, and master the key technology of designing and developing the nuclear instrument system outside the reactor with independent intellectual property rights.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a power range measuring device of a six-section uncompensated ionization chamber, which solves the problems and meets the improvement requirements of a nuclear instrument system of a second-generation and a second-generation nuclear power plant.
The invention aims to provide a power range measuring device of an out-of-pile nuclear instrument system, which meets the requirements of a third-generation nuclear power nuclear instrument system and also considers the improvement requirement of a second-generation nuclear instrument system. According to the measuring device, a current signal measured by the power range detector is sent to the system protection cabinet for conditioning and processing, reactor parameters such as average power, axial power deviation and the like of the reactor are calculated, the power level and power change of the reactor are continuously monitored, and the reactor is triggered to be stopped emergently when the power range of the reactor is high, the neutron fluence rate is high (low setting value and high setting value), the power range is high, the neutron fluence rate is high and negative by the reactor protection system. The measuring device can analyze (0-500) mu A6-path power range detector input signals, the micro-current measuring precision is superior to 0.1% F.S, the analog output measuring precision such as average power and axial power deviation is superior to 0.1% F.S, the analog acquisition precision is superior to 0.1% F.S, the high-voltage output precision is less than 0.3% F.S, and the emergency shutdown response time is less than 36 ms. The method can be used for the power measuring range of the nuclear instrument system of the second generation nuclear power reactor, the second generation nuclear power reactor and the third generation nuclear power reactor.
The invention is realized by adopting a technical scheme consisting of the following technical measures, and the specific design idea is as follows: the power range case is an important component of the protection cabinet of the out-of-stack nuclear instrument measurement system, and is divided into a conditioning part and a processing part, wherein the conditioning part is a nuclear measurement special module and is positioned on the left side of the case and occupies the width of 5 multiplied by 6 HP. The processing section is located on the right side of the chassis, occupying a width of 9 x 6 HP. The conditioning part consists of a low-voltage module, a non-compensation ionization chamber high-voltage module and a power range amplifying module. The processing part consists of a power range master control module, a high-frequency pulse counting module, an analog quantity input module, two analog quantity output modules, two switching value output modules, a maintenance module and a communication module, wherein the high-frequency pulse counting module integrates the functions of multi-channel frequency signal acquisition and multi-channel switching value input signal acquisition.
The invention is realized by the following technical scheme:
the power range measuring method of the six-section uncompensated ionization chamber comprises the following steps:
the method comprises the steps that a power range detector is adopted to output 6-section micro-current signals to a conditioning part, the conditioning part converts the 6-section micro-current signals into 6-section frequency signals to be output to a processing part, and the conditioning part simultaneously outputs direct current neutron noise signals and alternating current neutron noise signals of the 2 nd section and the 5 th section in the 6-section micro-current signals;
the processing part inputs 6 sections of collected frequency signals, switching value signals and analog quantity signals through high-frequency pulse counting and analog quantity, and carries out average current calculation of an upper section, average current calculation of a lower section, average power calculation, axial power deviation calculation, fixed value comparison and fault detection processing.
Further, the method specifically comprises the following steps:
a multichannel power range detector, namely a 6-section ionization chamber power range detector is used for outputting micro-current signals to a conditioning part, the conditioning part acquires 6 paths of micro-current signals of 0-500 muA and sends the micro-current signals to a processing part, the processing part adopts average slip filtering and first-order lag filtering for filtering processing, and the micro-current signals are output after filtering;
the processing operation of the processing part is as follows:
calculating to obtain the average electricity of the upper three sections by using a formula (1) according to the collected micro-current values of the 1 st to 3 rd sectionsFlow value, in formula: i isHThe average current of the upper three sections is in the unit of mu A; ii is the ith segment current value (i ═ 1,2,3) in μ a;
according to the collected micro current values of the 4 th section to the 6 th section, calculating by using a formula (2) to obtain the average current value of the following three sections, wherein in the formula: i isBThe average current of the lower three sections is in the unit of mu A; ii is the ith segment current value (i ═ 4,5,6) in μ a;
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBThe average power phi is calculated by using the formula (3)AVGIn the formula: phi is aAVGIs the average power in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; k is a power adjustment coefficient and is dimensionless; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; g is a scale factor, and the unit is% FP/A;
φAVG＝G·K(KHIH+KBIB)·10-6 (3)
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBAnd calculating the axial power deviation delta phi by using a formula (4), wherein: Δ φ is the axial power deviation in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; alpha is an axial power deviation adjustment coefficient (alpha) for representing the axial offset sensitivity of the power range detector to the reactor core, and is dimensionless; g is a scale factor and is a scale factor,the unit is% FP/A;
Δφ＝G·α(KHIH-KBIB)·10-6 (4)
the processing part also outputs the analog quantity data included in the operation process to other external systems, and the other external systems store and process the analog quantity data.
Integrating the measuring device in a power range case: the reactor core power range detector comprises a 6-section ionization chamber power range detector arranged outside a reactor pressure vessel, wherein the 6-section ionization chamber power range detector is a 6-section ionization chamber neutron power range detector, and the 6-section ionization chamber power range detector is used for measuring the neutron fluence rate of reactor core leakage;
the power range case is an important component of the protection cabinet of the out-of-stack nuclear instrument measurement system, and is divided into a conditioning part and a processing part, wherein the conditioning part is a nuclear measurement special module and is positioned on the left side of the case and occupies the width of 5 multiplied by 6 HP. The processing section is located on the right side of the chassis, occupying a width of 9 x 6 HP. The conditioning part consists of a low-voltage module, a non-compensation ionization chamber high-voltage module and a power range amplifying module. The processing part consists of a power range master control module, a high-frequency pulse counting module, an analog quantity input module, two analog quantity output modules, two switching value output modules, a maintenance module and a communication module, wherein the high-frequency pulse counting module integrates the functions of multi-channel frequency signal acquisition and multi-channel switching value input signal acquisition. Wherein:
(1) the power range case adopts a front-back card insertion mode, the front side is provided with a function board card, the back side is provided with an IO board card, and the function board card and the IO board card are connected through a CPCI connector on the back board. The conditioning part and the processing part are the same back plate, and signals between the two parts are isolated by adopting an optical coupler.
(2) The +24VDC power supply of the power range cabinet conditioning part is provided by a linear power supply, and the low-voltage module converts the +24VDC into +15V, -15V, +5V and isolated +24V and then supplies the +15V, +5V and +24V to the non-compensation ionization chamber high-voltage module and the power range amplifying module. The low-voltage module is internally provided with a monitoring circuit, and the working state of the low-voltage module is displayed through four indicating lamps on the front panel of the low-voltage module. The +24VDC power for the processing portion of the power span chassis is provided by PLUS power modules, each module of the processing portion receiving the +24VDC power through the backplane.
(3) The working power supply of the power range detector is provided by the uncompensated ionization chamber high-voltage module, the high-voltage output value is controlled by the power range main control module through a (4-20) mA current signal of the analog quantity output module, and meanwhile, the power range main control module collects a (4-20) mA high-voltage sampling signal output by the uncompensated ionization chamber high-voltage module through the analog quantity input module to judge the high-voltage working state and control an indicator lamp of the uncompensated ionization chamber high-voltage module.
(4) And when a periodic test is carried out, the power range main control module controls the relay through the switching value output module to switch the signal to a test end for input. In addition, the power range amplification module also outputs direct current neutron noise signals (0V-10V) and alternating current neutron noise signals (-5V to +5V, 0.5 Hz-150 Hz) of the 2 nd section and the 5 th section of the power range detector to the loosening component and the vibration monitoring system.
(5) The power range case collects 6 paths of frequency signals output by the power range amplifying module through the high-frequency pulse counting module, collects P10 non-signals input by an external system for internal logic processing, collects a cabinet door opening signal, a fan signal, a temperature alarm signal and the like of a protection cabinet of the nuclear instrument measuring system of the reactor for internal logic and channel fault judgment processing.
(6) The power range case acquires main pump rotating speed change and a circuit average temperature change signal input by an external system through an analog input module, and is used for calibrating the fast neutron fluence rate change rate.
(7) The power range case performs operations such as upper three-section average current calculation, lower three-section average current calculation, average power calculation, axial power deviation calculation, fixed value comparison, logic processing and the like through the power range main control module.
(8) The power range case outputs analog quantity signals such as average power, axial power deviation, upper current and lower current of a power range detector and the like obtained by calculation of the power range main control module to other external systems through the analog quantity output module, and outputs switching quantity signals such as a neutron fluence rate positive change rate high emergency shutdown signal, a neutron fluence rate negative change rate high emergency shutdown signal, a P10 non-signal, a signal with power higher than P10, a signal with power higher than P8, a signal with power higher than P16, a low fixed value emergency shutdown signal, a high fixed value emergency shutdown signal, a signal with power difference used for an ATWS signal, a PR channel test or fault signal, a signal with power lower than C20, a lifting rod locking signal C2 and a signal with power higher than 96 FP% to other external systems through the switching quantity output module.
(9) The power range case transmits data such as equipment information to the control cabinet through the communication module, and functions such as software downloading, parameter modification, online monitoring and the like are achieved through the maintenance module.
As a further improvement of the invention, the low-voltage module adopts a linear power supply module, and the peak value of the ripple of the output voltage of +24V, +15V, -15V and +5V is not more than 10 mV.
Furthermore, the non-compensation ionization chamber high-voltage module adopts a program-controlled high-voltage module, the output voltage (0-1500) V is adjustable, and the peak-to-peak value of the high-voltage output ripple is not more than 10 mV.
Furthermore, the power range amplification module can realize six-circuit (0-500) muA micro-current signal amplification, and the micro-current measurement precision is superior to 0.1% F.S; meanwhile, the measurement of two paths of direct current neutron noise signals and two paths of alternating current neutron noise signals can be realized.
Furthermore, the processing part adopts an NASBIC platform and engineer station software, carries out parameter modification of software downloading through a maintenance module, and carries out data interaction with an external system through a communication module.
Furthermore, the power range detector is connected with the power range amplifying module through a multilayer coaxial shielded cable, and the length of the micro-current signal transmission cable can reach at least 150 m.
The invention has the following advantages and beneficial effects:
firstly, the method comprises the following steps: the power range measuring device of the out-of-stack nuclear instrument measuring system performs optical coupling isolation on the conditioning part and the processing part, converts a signal amplified by a micro-current into a frequency signal and outputs the frequency signal, and improves the anti-interference capability of the power range measuring device of the out-of-stack nuclear instrument measuring system.
Secondly, the method comprises the following steps: the power range measuring device of the measuring system of the out-of-stack nuclear instrument adopts intelligent detection means such as program control high voltage, high voltage automatic extraction, signal input channel program control selection, module fault automatic detection and the like, and improves the intelligent degree and the self-diagnosis coverage rate of the power range measuring device of the measuring system of the out-of-stack nuclear instrument.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a block diagram of the present invention.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive changes, are within the scope of the present invention.
The power range measuring method of the six-section uncompensated ionization chamber comprises the following steps:
the method comprises the steps that a power range detector is adopted to output 6-section micro-current signals to a conditioning part, the conditioning part converts the 6-section micro-current signals into 6-section frequency signals to be output to a processing part, and the conditioning part simultaneously outputs direct current neutron noise signals and alternating current neutron noise signals of the 2 nd section and the 5 th section in the 6-section micro-current signals;
the processing part inputs 6 sections of collected frequency signals, switching value signals and analog quantity signals through high-frequency pulse counting and analog quantity, and carries out average current calculation of an upper section, average current calculation of a lower section, average power calculation, axial power deviation calculation, fixed value comparison and fault detection processing.
Further, the method specifically comprises the following steps:
a multichannel power range detector, namely a 6-section ionization chamber power range detector is used for outputting micro-current signals to a conditioning part, the conditioning part acquires 6 paths of micro-current signals of 0-500 muA and sends the micro-current signals to a processing part, the processing part adopts average slip filtering and first-order lag filtering for filtering processing, and the micro-current signals are output after filtering;
the processing operation of the processing part is as follows:
according to the collected 1 st to 3 rd section micro current values, calculating by using a formula (1) to obtain an average current value of the upper three sections, wherein in the formula: i isHThe average current of the upper three sections is in the unit of mu A; ii is the ith segment current value (i ═ 1,2,3) in μ a;
according to the collected micro current values of the 4 th section to the 6 th section, calculating by using a formula (2) to obtain the average current value of the following three sections, wherein in the formula: i isBThe average current of the lower three sections is in the unit of mu A; ii is the ith segment current value (i ═ 4,5,6) in μ a;
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBThe average power phi is calculated by using the formula (3)AVGIn the formula: phi is aAVGIs the average power in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; k is a power adjustment coefficient and is dimensionless; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; g is a scale factor, and the unit is% FP/A;
φAVG＝G·K(KHIH+KBIB)·10-6 (3)
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBAnd calculating the axial power deviation delta phi by using a formula (4), wherein: Δ φ is the axial power deviation in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; alpha is an axial power deviation adjustment coefficient (alpha) for representing the axial offset sensitivity of the power range detector to the reactor core, and is dimensionless; g is a scale factor, and the unit is% FP/A;
Δφ＝G·α(KHIH-KBIB)·10-6 (4)
the processing part also outputs the analog quantity data included in the operation process to other external systems, and the other external systems store and process the analog quantity data.
Integrating the measuring device in a power range case: the reactor core power range detector comprises a 6-section ionization chamber power range detector arranged outside a reactor pressure vessel, wherein the 6-section ionization chamber power range detector is a 6-section ionization chamber neutron power range detector, and the 6-section ionization chamber power range detector is used for measuring the neutron fluence rate of reactor core leakage;
the power range case is an important component of the protection cabinet of the out-of-stack nuclear instrument measurement system, and is divided into a conditioning part and a processing part, wherein the conditioning part is a nuclear measurement special module and is positioned on the left side of the case and occupies the width of 5 multiplied by 6 HP. The processing section is located on the right side of the chassis, occupying a width of 9 x 6 HP. The conditioning part consists of a low-voltage module, a non-compensation ionization chamber high-voltage module and a power range amplifying module. The processing part consists of a power range master control module, a high-frequency pulse counting module, an analog quantity input module, two analog quantity output modules, two switching value output modules, a maintenance module and a communication module, wherein the high-frequency pulse counting module integrates the functions of multi-channel frequency signal acquisition and multi-channel switching value input signal acquisition.
Wherein:
(1) the power range case adopts a front-back card insertion mode, the front side is provided with a function board card, the back side is provided with an IO board card, and the function board card and the IO board card are connected through a CPCI connector on the back board. The conditioning part and the processing part are the same back plate, and signals between the two parts are isolated by adopting an optical coupler.
(2) The +24VDC power supply of the power range cabinet conditioning part is provided by a linear power supply, and the low-voltage module converts the +24VDC into +15V, -15V, +5V and isolated +24V and then supplies the +15V, +5V and +24V to the non-compensation ionization chamber high-voltage module and the power range amplifying module. The low-voltage module is internally provided with a monitoring circuit, and the working state of the low-voltage module is displayed through four indicating lamps on the front panel of the low-voltage module. The +24VDC power for the processing portion of the power span chassis is provided by PLUS power modules, each module of the processing portion receiving the +24VDC power through the backplane.
(3) The working power supply of the power range detector is provided by the uncompensated ionization chamber high-voltage module, the high-voltage output value is controlled by the power range main control module through a (4-20) mA current signal of the analog quantity output module, and meanwhile, the power range main control module collects a (4-20) mA high-voltage sampling signal output by the uncompensated ionization chamber high-voltage module through the analog quantity input module to judge the high-voltage working state and control an indicator lamp of the uncompensated ionization chamber high-voltage module.
(4) And when a periodic test is carried out, the power range main control module controls the relay through the switching value output module to switch the signal to a test end for input. In addition, the power range amplification module also outputs direct current neutron noise signals (0V-10V) and alternating current neutron noise signals (-5V to +5V, 0.5 Hz-150 Hz) of the 2 nd section and the 5 th section of the power range detector to the loosening component and the vibration monitoring system.
(5) The power range case collects 6 paths of frequency signals output by the power range amplifying module through the high-frequency pulse counting module, collects P10 non-signals input by an external system for internal logic processing, collects a cabinet door opening signal, a fan signal, a temperature alarm signal and the like of a protection cabinet of the nuclear instrument measuring system of the reactor for internal logic and channel fault judgment processing.
(6) The power range case acquires main pump rotating speed change and a circuit average temperature change signal input by an external system through an analog input module, and is used for calibrating the fast neutron fluence rate change rate.
(7) The power range case performs operations such as upper three-section average current calculation, lower three-section average current calculation, average power calculation, axial power deviation calculation, fixed value comparison, logic processing and the like through the power range main control module.
(8) The power range case outputs analog quantity signals such as average power, axial power deviation, upper current and lower current of a power range detector and the like obtained by calculation of the power range main control module to other external systems through the analog quantity output module, and outputs switching quantity signals such as a neutron fluence rate positive change rate high emergency shutdown signal, a neutron fluence rate negative change rate high emergency shutdown signal, a P10 non-signal, a signal with power higher than P10, a signal with power higher than P8, a signal with power higher than P16, a low fixed value emergency shutdown signal, a high fixed value emergency shutdown signal, a signal with power difference used for an ATWS signal, a PR channel test or fault signal, a signal with power lower than C20, a lifting rod locking signal C2 and a signal with power higher than 96 FP% to other external systems through the switching quantity output module.
(9) The power range case transmits data such as equipment information to the control cabinet through the communication module, and functions such as software downloading, parameter modification, online monitoring and the like are achieved through the maintenance module.
As a further improvement of the invention, the low-voltage module adopts a linear power supply module, and the peak value of the ripple of the output voltage of +24V, +15V, -15V and +5V is not more than 10 mV.
Furthermore, the non-compensation ionization chamber high-voltage module adopts a program-controlled high-voltage module, the output voltage (0-1500) V is adjustable, and the peak-to-peak value of the high-voltage output ripple is not more than 10 mV.
Furthermore, the power range amplification module can realize six-circuit (0-500) muA micro-current signal amplification, and the micro-current measurement precision is superior to 0.1% F.S; meanwhile, the measurement of two paths of direct current neutron noise signals and two paths of alternating current neutron noise signals can be realized.
Furthermore, the processing part adopts an NASBIC platform and engineer station software, carries out parameter modification of software downloading through a maintenance module, and carries out data interaction with an external system through a communication module.
Furthermore, the power range detector is connected with the power range amplifying module through a multilayer coaxial shielded cable, and the length of the micro-current signal transmission cable can reach at least 150 m.
Example 1:
the construction process of the measuring device used in the power range measuring method of the six-section uncompensated ionization chamber in the embodiment is as follows: the power range measurement chassis is assembled according to the block diagram of the measurement device shown in fig. 1, and the structure and the principle of the power range measurement chassis are shown in fig. 1, and the power range measurement chassis comprises a low-voltage module, a non-compensation ionization chamber high-voltage module, a power range amplification module, a high-frequency pulse counting module, an analog input module, an analog output module, a switching value output module, a communication module, a maintenance module, a power range main control module, a back plate, a conditioning power input switching module, a conditioning part signal switching module, a high-frequency pulse input switching module, an analog output switching module, a switching value output switching module and a processing power input switching module.
The specific measurement method comprises the following steps: six sections of micro-current signals output by the ionization chamber power range detector are transmitted to a signal switching module of a conditioning part of the power range case through a coaxial cable, then the six sections of micro-current signals are converted into six sections of frequency signals after being processed by a power range amplifying module and output to a high-frequency pulse counting module, and meanwhile, direct current neutron noise signals and alternating current neutron noise signals of the 2 nd section and the 5 th section are output. And then, the power range main control module performs operations such as upper-section average current calculation, lower-section average current calculation, average power calculation, axial power deviation calculation, fixed value comparison, fault detection processing and the like according to the frequency signals, the switching value signals and the analog quantity signals acquired by the high-frequency pulse counting module and the analog quantity input module. Finally, the power range case outputs analog quantity signals such as average current of the upper three sections, average current of the lower three sections, average power, axial power deviation and the like to other systems through the analog quantity output module and the switching value output module, outputs switching value signals such as emergency shutdown with high neutron fluence rate positive change rate, emergency shutdown with high neutron fluence rate negative change rate, P10 NOT, power higher than P10, power higher than P8, power higher than P16, low fixed value emergency shutdown, high fixed value emergency shutdown, power difference used for ATWS, PR channel test or fault, power lower than C20, rod lifting locking C2, power higher than 96% FP and the like to other external systems, and realizes data interaction, software downloading, parameter modification, variable monitoring and the like through the communication module and the maintenance module.
The instrumentation and materials used in this example were:
the multi-channel micro-current signal source is a multi-channel signal source and can simultaneously output 32 (0-500) muA micro-current signals;
the adopted case is a safety-level DCS platform universal 6U case, the size is 482.6mm multiplied by 320.5mm multiplied by 265.35mm, the shock resistance, impact resistance and electromagnetic shielding capability are good, and the shock resistance and electromagnetic compatibility requirements of safety-level instrument control equipment installed in a nuclear power plant are met;
the low-voltage module is a linear power supply module and can convert the input 24VDC into +15V, -15V, +5V and +24V output;
the high-voltage module of the uncompensated ionization chamber is a program-controlled high-voltage module, the high-voltage output (0-1500) V is continuously adjustable, and the high-voltage recovery function is realized;
the power range amplification module is a micro-current power range amplification module, can simultaneously convert 6 paths (0-500) of micro-current signals into (0-1) MHz frequency signals for output, and simultaneously outputs two paths of direct current neutron noise signals and two paths of alternating current neutron noise signals;
the high-frequency pulse counting module is provided with 8-channel frequency signal acquisition function and 16-channel dry contact switching value input signal acquisition function;
the analog input module has 16 analog signal acquisition functions, the input precision is less than or equal to 0.1 percent F.S-25 ℃, and the temperature drift is less than or equal to 100 ppm/DEG C;
the analog output module has 8 analog signal output functions, the output precision is less than or equal to 0.2 percent F.S-25 ℃, the extraction precision is less than or equal to 1 percent F.S-25 ℃, and the temperature drift is less than or equal to 100 ppm/DEG C;
the used switching value output module has 32-path dry contact switching value output function, and the response time is less than 10 ms;
the used communication module and maintenance module have the functions of communication protocol analysis, data transmission, communication fault diagnosis and the like;
the power range master control module supports point-to-point data transmission with at most 13 other functional modules in the case, three working modes of operation, maintenance and downloading are supported, and functions of output locking, power failure diagnosis, communication failure diagnosis, manual reset, online debugging, hot plug and running state indicator light are supported.
The industrial personal computer is provided with NASBIC platform engineer software and is used for software compiling, downloading, running, debugging and online monitoring of the power range main control module.
The specific measurement operation steps are as follows:
the first step is as follows: measurement of micro-current signal output by power range detector
And downloading the application software of the power range case into the power range main control module through the engineer station software of the industrial personal computer, and arranging the power range main control module in the maintenance module. The method comprises the steps of simulating a micro-current signal output by a power range detector by using a multi-channel micro-current source, inputting 6 circuits of micro-current signals of 0-500 muA to a conditioning part signal switching module, simultaneously checking 6 circuits of micro-current acquisition values on engineer station software of an industrial personal computer, and filtering the acquired current signals by using average slip filtering and first-order lag filtering in the 6 circuits of micro-current signal acquisition process.
The second step is that: mean power and axial power offset calculation
And (3) calculating to obtain the average current value of the upper three sections by using a formula (1) according to the collected micro current values of the 1 st to 3 rd sections, and outputting the average current value to other external systems through an analog output module. In the formula: i isHThe average current of the upper three sections is in the unit of mu A; ii is the ith segment current value (i ═ 1,2,3) in μ a.
And (3) calculating to obtain the average current value of the next three sections by using a formula (2) according to the collected micro current values of the 4 th to 6 th sections, and outputting the average current value to other external systems through an analog output module. In the formula: i isBThe average current of the lower three sections is in the unit of mu A; ii is the ith segment current value (i ═ 4,5,6) in μ a.
According to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBThe average power phi is calculated by using the formula (3)AVGAnd output to other external systems through the analog quantity output module. In the formula: phi is aAVGIs the average power in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; k is a power adjustment coefficient and is dimensionless; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; g is a scale factor in% FP/A.
φAVG＝G·K(KHIH+KBIB)·10-6 (3)
According to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBAnd calculating to obtain the axial power deviation delta phi by using a formula (4), and outputting to other external systems through an analog output module. In the formula: Δ φ is the axial power deviation in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; alpha is an axial power deviation adjustment coefficient (alpha) for representing the axial offset sensitivity of the power range detector to the reactor core, and is dimensionless; g is scale factor, and the unit is%FP/A。
Δφ＝G·α(KHIH-KBIB)·10-6 (4)
The third step: comparison of fixed values
According to the average power and the axial power variation obtained by calculation and the external analog quantity signal and the external switching value signal acquired by the analog quantity input module and the high-frequency pulse counting module, power is higher than 96% F.P constant value comparison, ATWS power difference constant value comparison, power is higher than P10 constant value comparison, power is higher than P8 constant value comparison, power is higher than P16 constant value comparison, neutron fluence rate negative change rate high emergency stop constant value comparison, neutron fluence rate positive change rate high emergency stop constant value comparison, low constant emergency stop constant value comparison, high constant value emergency stop constant value comparison, power is lower than C20 constant value comparison, lifting rod locking signal C2 constant value comparison and high-voltage loss constant value comparison, and corresponding switching value signals are output to other external systems.
The fourth step: fault handling
The power range case of the out-of-core nuclear instrument measurement system judges and processes channel faults by collecting the running state information of each module of the conditioning part and the processing part and combining a channel test state signal, a cabinet door opening signal, a cabinet temperature signal and a cabinet fan state signal.
The fifth step: information processing
The power range case of the out-of-stack nuclear instrument measuring system sends the gathered information to the control cabinet through the communication module, and performs information interaction with the industrial personal computer and the maintenance equipment through the maintenance module.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The power range measuring method of the six-section uncompensated ionization chamber is characterized by comprising the following steps of:
the method comprises the steps that a power range detector is adopted to output 6-section micro-current signals to a conditioning part, the conditioning part converts the 6-section micro-current signals into 6-section frequency signals to be output to a processing part, and the conditioning part simultaneously outputs direct current neutron noise signals and alternating current neutron noise signals of the 2 nd section and the 5 th section in the 6-section micro-current signals;
the processing part inputs 6 sections of collected frequency signals, switching value signals and analog quantity signals through high-frequency pulse counting and analog quantity, and carries out average current calculation of an upper section, average current calculation of a lower section, average power calculation, axial power deviation calculation, fixed value comparison and fault detection processing.
2. The power span measurement method of the six-segment uncompensated ionization chamber of claim 1 is characterized by comprising the following specific steps of:
a multichannel power range detector, namely a 6-section ionization chamber power range detector is used for outputting micro-current signals to a conditioning part, the conditioning part acquires 6 paths of micro-current signals of 0-500 muA and sends the micro-current signals to a processing part, the processing part adopts average slip filtering and first-order lag filtering for filtering processing, and the micro-current signals are output after filtering;
the processing part carries out the following steps of calculating the average current of the upper three sections, calculating the average current of the lower three sections, calculating the average power, calculating the axial power deviation and comparing the fixed value:
according to the collected 1 st to 3 rd section micro current values, calculating by using a formula (1) to obtain an average current value of the upper three sections, wherein in the formula: i isHThe average current of the upper three sections is in the unit of mu A; ii is the ith segment current value (i ═ 1,2,3) in μ a;
according to the collected micro current values of the 4 th section to the 6 th section, calculating by using a formula (2) to obtain the average current value of the next section, wherein the formula is：IBThe average current of the lower three sections is in the unit of mu A; ii is the ith segment current value (i ═ 4,5,6) in μ a;
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBThe average power phi is calculated by using the formula (3)AVGIn the formula: phi is aAVGIs the average power in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; k is a power adjustment coefficient and is dimensionless; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; g is a scale factor, and the unit is% FP/A;
φAVG＝G·K(KHIH+KBIB)·10-6 (3)
according to the calculated average current I of the upper three sectionsHAnd the average current I of the lower three sectionsBAnd calculating the axial power deviation delta phi by using a formula (4), wherein: Δ φ is the axial power deviation in% FP; i isHThe average current of the upper three sections is in the unit of mu A; i isBThe average current of the lower three sections is in the unit of mu A; kHThe adjustment coefficient of the upper part of the reactor core is dimensionless; kBThe adjustment coefficient of the lower part of the reactor core is dimensionless; alpha is an axial power deviation adjustment coefficient (alpha) for representing the axial offset sensitivity of the power range detector to the reactor core, and is dimensionless; g is a scale factor, and the unit is% FP/A;
Δφ＝G·α(KHIH-KBIB)·10-6 (4)
the processing part also outputs the analog quantity data included in the operation process to other external systems, and the other external systems store and process the analog quantity data.
3. The power range measurement method of the six-section uncompensated ionization chamber, according to claim 2, further comprising outputting analog quantity signals of average current of the upper three sections, average current of the lower three sections, average power and axial power deviation to other systems, outputting high emergency shutdown with positive change rate of neutron fluence rate, high emergency shutdown with negative change rate of neutron fluence rate, P10 NOT, power higher than P10, power higher than P8, power higher than P16, low-fixed-value emergency shutdown, high-fixed-value emergency shutdown, power difference signals of switching value such as ATWS, PR channel test or fault, power lower than C20, lifting bar locking C2 and power higher than 96% FP to other external systems, and realizing data interaction, software downloading, parameter modification and variable monitoring operation through a communication module and a maintenance module;
the specific steps of carrying out fixed value comparison on the measured data are as follows:
according to the average power and the axial power variation obtained by calculation and the external analog quantity signal and the external switching value signal acquired by the analog quantity input module and the high-frequency pulse counting module, power is higher than 96% F.P constant value comparison, ATWS power difference constant value comparison, power is higher than P10 constant value comparison, power is higher than P8 constant value comparison, power is higher than P16 constant value comparison, neutron fluence rate negative change rate high emergency stop constant value comparison, neutron fluence rate positive change rate high emergency stop constant value comparison, low constant emergency stop constant value comparison, high constant value emergency stop constant value comparison, power is lower than C20 constant value comparison, lifting rod locking signal C2 constant value comparison and high-voltage loss constant value comparison, and corresponding switching value signals are output to other external systems.
4. The power range measurement method of a six-stage uncompensated ionization chamber according to claim 3, further comprising collecting operation state information of each module of the conditioning part and the processing part, and simultaneously performing channel fault judgment and processing by combining a channel test state signal, a cabinet door opening signal, a cabinet temperature signal and a cabinet fan state signal.
5. The power range measuring device of the six-section uncompensated ionization chamber is characterized by comprising a 6-section ionization chamber power range detector arranged outside a reactor pressure vessel, wherein the 6-section ionization chamber power range detector is a 6-section ionization chamber neutron power range detector, and the 6-section ionization chamber power range detector is used for measuring the neutron fluence rate leaked from a reactor core;
the measuring device also comprises a conditioning part and a processing part;
the conditioning part receives a neutron fluence rate measured by the 6-section ionization chamber power range detector, namely 6-section micro-current signals, amplifies the acquired 6-circuit micro-current signals and converts the signals into frequency signals to be output, and the conditioning part amplifies the 6-section micro-current signals and outputs the amplified signals to the processing part for operation processing and fixed value comparison.
6. The power range measurement device of the six-section uncompensated ionization chamber according to claim 5, wherein the conditioning part is powered by a single linear power supply, and signals between the conditioning part and the processing part are isolated through optical coupling.
7. The power range measurement device of the six-section uncompensated ionization chamber of claim 5, wherein the conditioning part comprises an uncompensated ionization chamber high voltage module and a power range amplifying module;
the processing part comprises a power range master control module, a high-frequency pulse counting module, an analog quantity input module, two analog quantity output modules and two switching value output modules;
the high-frequency pulse counting module integrates the functions of multi-channel frequency signal acquisition and multi-channel switching value input signal acquisition;
the method comprises the following steps that 6-section micro-current signals, namely 6-path current signals, are sent to a power range amplification module through an input/output switching module of a conditioning part to be processed, the power range amplification module is used for amplifying six (0-500) muA micro-current signals, and the power range amplification module is also used for measuring two paths of direct current neutron noise signals and two paths of alternating current neutron noise signals;
the processing part and the conditioning part are connected with a control signal wire, and when a periodic test is carried out, a power range main control module of the processing part controls a relay through a switching value output module to switch a signal to a test end for input;
the high-frequency pulse counting module collects 6 paths of frequency signals output by the power range amplifying module, collects a P10 non-signal input by an external system for internal logic processing, collects a reactor outer nuclear instrument measuring system protection cabinet door opening signal, a fan signal and a temperature alarm signal for internal logic and channel fault judgment processing;
the analog quantity input module acquires main pump rotating speed change and a circuit average temperature change signal input by an external system and is used for calibrating the fast neutron fluence rate change rate;
the power range main control module is used for performing average current calculation of an upper three section, average current calculation of a lower three section, average power calculation, axial power deviation calculation, fixed value comparison and logic processing;
the uncompensated ionization chamber high-voltage module is adjustable in a program control mode within a (0-1500) V range, and is used for performing extraction on the high-voltage output of a conditioning part to monitor the state of the uncompensated ionization chamber high-voltage module.
8. The power span measurement device of the six-segment uncompensated ionization chamber of claim 7 wherein the processing section further comprises a maintenance module and a communication module, both of which interact with external devices for software compilation downloading, parameter modification and online algorithm monitoring.
9. The power range measurement device of the six-section uncompensated ionization chamber according to claim 7, further comprising a power range amplification module, wherein the power range amplification module further outputs direct current neutron noise signals (0V to 10V) and alternating current neutron noise signals (-5V to +5V, 0.5Hz to 150Hz) of the 2 nd section and the 5 th section of the power range detector to the loosening component and the vibration monitoring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110527792.8A CN113270217A (en) | 2021-05-14 | 2021-05-14 | Power range measuring method and device of six-section uncompensated ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110527792.8A CN113270217A (en) | 2021-05-14 | 2021-05-14 | Power range measuring method and device of six-section uncompensated ionization chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113270217A true CN113270217A (en) | 2021-08-17 |
Family
ID=77231007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110527792.8A Pending CN113270217A (en) | 2021-05-14 | 2021-05-14 | Power range measuring method and device of six-section uncompensated ionization chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113270217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685678A (en) * | 2008-09-27 | 2010-03-31 | 中国核动力研究设计院 | Vibration monitoring system of reactor and reactor internals |
| CN102426865A (en) * | 2011-09-30 | 2012-04-25 | 清华大学 | Fission chamber output signal digital processing system and method |
| CN105931685A (en) * | 2016-06-14 | 2016-09-07 | 中广核工程有限公司 | Nuclear power station primary circuit foreign matter monitoring system and nuclear power station primary circuit foreign matter monitoring method |
| CN106128529A (en) * | 2016-06-27 | 2016-11-16 | 中广核研究院有限公司 | A kind of On-line Measuring Method of reactor core three-dimensional power distribution |
| CN107195347A (en) * | 2017-06-23 | 2017-09-22 | 中国核动力研究设计院 | It is a kind of to calibrate the method that heap outer core surveys ionisation chamber |
| CN107274940A (en) * | 2017-05-18 | 2017-10-20 | 福建福清核电有限公司 | The method that Nuclear Instrument system power coefficient of ranger scale test performs opportunity optimization |
| CN108172312A (en) * | 2017-12-13 | 2018-06-15 | 广东核电合营有限公司 | The calibration method of the Axial power difference of nuclear power station out-pile Nuclear Instrument system |
| CN109031396A (en) * | 2018-05-24 | 2018-12-18 | 岭东核电有限公司 | A kind of Nuclear Instrument system parameter calibration method, apparatus and system |
| CN208570129U (en) * | 2018-06-27 | 2019-03-01 | 岭澳核电有限公司 | A kind of digitlization Nuclear Instrument RPN system |
| CN110749919A (en) * | 2019-10-12 | 2020-02-04 | 中广核研究院有限公司 | Method and device for calibrating nuclear reactor out-of-pile detector |
| CN111613356A (en) * | 2020-04-07 | 2020-09-01 | 福建福清核电有限公司 | Neutron high-flux alarm system and method during reactor shutdown |
| CN112213554A (en) * | 2020-09-04 | 2021-01-12 | 中国原子能科学研究院 | Weak current measuring circuit and method based on current frequency conversion method |
| CN212434264U (en) * | 2020-05-07 | 2021-01-29 | 华龙国际核电技术有限公司 | Nuclear instrument system |
| CN112466492A (en) * | 2020-11-26 | 2021-03-09 | 中国核动力研究设计院 | Measuring device for intermediate range of out-of-pile nuclear instrument system and application method thereof |
-
2021
- 2021-05-14 CN CN202110527792.8A patent/CN113270217A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685678A (en) * | 2008-09-27 | 2010-03-31 | 中国核动力研究设计院 | Vibration monitoring system of reactor and reactor internals |
| CN102426865A (en) * | 2011-09-30 | 2012-04-25 | 清华大学 | Fission chamber output signal digital processing system and method |
| CN105931685A (en) * | 2016-06-14 | 2016-09-07 | 中广核工程有限公司 | Nuclear power station primary circuit foreign matter monitoring system and nuclear power station primary circuit foreign matter monitoring method |
| CN106128529A (en) * | 2016-06-27 | 2016-11-16 | 中广核研究院有限公司 | A kind of On-line Measuring Method of reactor core three-dimensional power distribution |
| CN107274940A (en) * | 2017-05-18 | 2017-10-20 | 福建福清核电有限公司 | The method that Nuclear Instrument system power coefficient of ranger scale test performs opportunity optimization |
| CN107195347A (en) * | 2017-06-23 | 2017-09-22 | 中国核动力研究设计院 | It is a kind of to calibrate the method that heap outer core surveys ionisation chamber |
| CN108172312A (en) * | 2017-12-13 | 2018-06-15 | 广东核电合营有限公司 | The calibration method of the Axial power difference of nuclear power station out-pile Nuclear Instrument system |
| CN109031396A (en) * | 2018-05-24 | 2018-12-18 | 岭东核电有限公司 | A kind of Nuclear Instrument system parameter calibration method, apparatus and system |
| CN208570129U (en) * | 2018-06-27 | 2019-03-01 | 岭澳核电有限公司 | A kind of digitlization Nuclear Instrument RPN system |
| CN110749919A (en) * | 2019-10-12 | 2020-02-04 | 中广核研究院有限公司 | Method and device for calibrating nuclear reactor out-of-pile detector |
| CN111613356A (en) * | 2020-04-07 | 2020-09-01 | 福建福清核电有限公司 | Neutron high-flux alarm system and method during reactor shutdown |
| CN212434264U (en) * | 2020-05-07 | 2021-01-29 | 华龙国际核电技术有限公司 | Nuclear instrument system |
| CN112213554A (en) * | 2020-09-04 | 2021-01-12 | 中国原子能科学研究院 | Weak current measuring circuit and method based on current frequency conversion method |
| CN112466492A (en) * | 2020-11-26 | 2021-03-09 | 中国核动力研究设计院 | Measuring device for intermediate range of out-of-pile nuclear instrument system and application method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102456419B (en) | Method for monitoring nuclear reactor canned motor pump operation fault and monitoring system | |
| CN113270217A (en) | Power range measuring method and device of six-section uncompensated ionization chamber | |
| CN1744419A (en) | Monitoring system for capcade multi-level high-voltage frequency transfomrer power unit | |
| CN106324376A (en) | Integrated medical onsite safety testing system and method | |
| CN111077487A (en) | Portable nuclear instrument system signal detection and fault positioning device | |
| EP0400405A2 (en) | Apparatus and method for diagnosis of power appliances | |
| CN114485921B (en) | Method and system for monitoring vibration of reactor equipment element | |
| CN203337829U (en) | Air beta radioactivity monitoring device | |
| CN208568994U (en) | A kind of electric relay detection device | |
| US6633622B2 (en) | Reactor power output measurement device | |
| CN112859725B (en) | Monitoring system for status characteristic signals of plant equipment | |
| CN220065196U (en) | Out-of-core nuclear measuring instrument for nuclear reactor | |
| CN212434264U (en) | Nuclear instrument system | |
| CN116705358A (en) | Out-of-core nuclear measuring instrument for nuclear reactor | |
| JPH09236687A (en) | Fixed type in-reactor instrumentation | |
| CN206523642U (en) | Nuclear power exhaust treatment system radiation monitoring equipment | |
| CN113436766B (en) | Off-stack nuclear instrument system equipment for nuclear power plant | |
| Wei et al. | Design of ITER neutron flux monitor system back-end electronics | |
| CN211347084U (en) | Loose part detection system and nuclear power system | |
| CN212162921U (en) | Online monitoring and protection integrated device for multi-core processing | |
| CN219085317U (en) | Testing device for pulse integrated control system | |
| Li et al. | Design and construction of power range channel for the third generation reactor nuclear instrumentation system | |
| CN219759209U (en) | Nuclear grade earthquake monitoring and shutdown integrated control system | |
| CN216561521U (en) | Signal channel checking device suitable for industrial control system of nuclear power station | |
| CN215579597U (en) | Temperature and humidity monitoring device in switch cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |