CN110826204A - Range switching logic optimization and verification method for intermediate range of nuclear measurement system - Google Patents
Range switching logic optimization and verification method for intermediate range of nuclear measurement system Download PDFInfo
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Abstract
The invention relates to a nuclear power plant detection system intermediate range switching logic optimization and verification method, wherein judgment on changes of any range codes A1, A2 and A3 is added on a TXS side, and any change of any range codes A1, A2 and A3 is regarded as range switching, so that nuclear power plant detection system intermediate range signal output is locked and an acquisition cycle is delayed for 50 ms; on the TXP side, the logic of range change blocking current signal output is increased, and meanwhile, the delay logic of effective bit A5 signal blocking current signal output is increased, so that the stability of equipment operation is greatly improved, the risk of unit stack jump caused by signal flash during range switching of the intermediate range of the nuclear instrument system is reduced, and the reliability of the equipment is improved.
Description
Technical Field
The invention relates to the technical field of nuclear power devices, in particular to a method for optimizing and verifying range switching logic of a middle range of a nuclear measurement system.
Background
A nuclear instrumentation system (RPN system for short) is a monitoring device that measures reactor power, power change rate, and radial and axial distribution of power with a series of neutron detectors distributed outside the reactor pressure vessel, which is one of important systems directly related to reactor safety, and generally meets the requirement of redundant monitoring of the reactor core by overlapping two by two (at least two orders of magnitude) of three ranges. The intermediate range channel of the Ridge Australian second-stage RPN system is used for monitoring the reactor power of the unit from the critical state to the 10% FP process in real time. The neutron current measurement of the middle range is divided into 7 magnitude levels, and the signal modulation board card divides the current signal of the middle range into an analog quantity signal and a switching value signal for transmission by adopting a segmented transmission principle. The three-bit binary switching value signal represents different magnitudes, and the analog value signal is a 0-10V voltage value corresponding to each magnitude.
When the RPN intermediate range is used for signal transmission, because the analog quantity and the switching value (range coding/effective bit) representing the RPN intermediate range signal pass through different digital processing plates, the two types of signal transmission can not be completely synchronous, so that the analog quantity signal and the switching value signal are not completely synchronous in change, finally, the trend of the intermediate range current signal calculated by DCS near the intermediate range switching point is not smooth, and the intermediate range current signal flashes spike disturbance.
During the overhaul of the unit, the intermediate range signal acquisition calculation and the range switching are mainly found through a field simulation intermediate range current switching test.
(1) The analog signal is switched before the switching value signal
As shown in fig. 1, as the reactor power is reduced, the mid-span current is gradually reduced, inside the current handling board ACCG4, when the span switching point is reached,
the invalid signal INVALID acts, the range code is changed, and then the analog current value begins to change; however, since the response time of the analog quantity signal is fast and is acquired by the DCS one scanning cycle earlier than the switching quantity signal, it appears in this cycle: the analog quantity has changed, the switching quantity has not changed, and therefore current disturbance occurs.
(2) Switching of analog signal after switching signal
As shown in fig. 2, in order to solve the problem of long-term overpressure operation of the intermediate range signal in the full-power saturated state of the unit during the modification process, a new isolation module pheenix UI-DCT is replaced, and tests show that the corresponding output time of the isolation module is about 11ms (the signal changes from 10% to 90%), and the analog quantity cannot complete the change process before the locking signal is unlocked, so that the output signal at the end of the DCS still has a general fluctuation phenomenon.
(3) Inconsistent transmission of the switching value signal itself
TXS adopts effective bit locking, changes to an invalid state in a switching stage, finishes range switching after changing to the valid state,
carrying out normal range switching; according to the field measured data, the time that the switching value is changed from 0 to 1 is found to be larger than the time that the switching value is changed from 1 to 0, so that the change between the locking signal and the range code is not completely consistent, and when the inconsistent change process is collected by the RPS, the locking is failed, and the current disturbance is caused.
(4) The problem of DCS locking logic acquisition due to no locking logic at ATWT (KCP) side
As shown in fig. 3, it is found through field simulation of mid-range current switching test that there is a risk of false shutdown on the KCS side during overhaul of the unit: the processing period of the KCS is 50ms, and the shortest blocking signal triggered by the RPN cabinet is only 10.5ms, so that the KCS cannot ensure that the blocking signal can be acquired at each range switching.
According to the logic design of ATWT, the signal of middle range transmitted to KCP cabinet and participating in ATWT protection is not designed in the process of range switching
And the locking function causes that the current signal at the ATWT side has fluctuation risk in the process of switching the measuring range, and the monitoring of the state of the intermediate measuring range is influenced.
Disclosure of Invention
The invention aims to provide a method for optimizing and verifying range switching logic of intermediate range of a nuclear measurement system.
The technical scheme adopted by the invention for solving the technical problems is as follows: constructing a range switching logic optimization and verification method of the intermediate range of a nuclear measurement system,
the method comprises the steps that a middle-range detector measures neutron current signals escaping out of a reactor, the neutron current signals are transmitted to a nuclear instrumentation system (RPN) cabinet through a cable switching device, a signal cable and a nuclear island penetrating piece, the neutron current signals convert 1E-11A-1E-3A currents output by a probe into analog quantity signals represented by 0-10V voltages and switching quantity signals representing range codes A1, A2 and A3, parity check bits A4 and effective bits A5 through an amplification processing module of a current processing plate ACCG4 in the RPN cabinet;
the analog quantity signal is sent out through a filtering module, an analog quantity conversion module and an isolation module of a current processing plate ACCG4, and the switching value signal is sent out through a 16ITOR optical isolation module and an I.32STOR relay module;
on the TXS side, judgment of changes of any range code A1, A2 and A3 is added, and any change of any range code A1, A2 and A3 is considered as range switching, so that the output of a middle range signal of the nuclear power plant detection system is locked, and one acquisition cycle is delayed by 50 ms;
on the TXP side, the logic for span change blocking current signal output is increased, while the delay logic for the valid bit a5 signal blocking current signal output is increased.
Preferably, on the TXS side, if a switch is detected by the valid bit a5 of the nuclear power plant detection system intermediate range, no determination is made as to the change in the range codes a1, a2, A3.
Preferably, the method further comprises verifying the modified logic function, injecting a certain amount of test signals into the front end of the measuring cabinet, enabling the current on the analog probe side to be close to a range switching point, and adopting a current signal with cyclic injection step change to enable the intermediate range of the nuclear power plant detection system to be frequently switched between ranges, simultaneously monitoring whether the waveform of an output signal is smooth in transition on the TXS side and the TXP side, and simultaneously verifying the locking function of the valid bit A5 signal to the signal output when the ranges are switched.
Preferably, the complete response time of the isolation module is 4-6 ms, and the 10-90% response time is 0.1-2 ms.
The implementation of the invention has the following beneficial effects: after the range switching logic of the intermediate range of the nuclear power plant detection system is optimized, the signal fluctuation of the intermediate range signal during range switching can be effectively reduced, and even when the nuclear power is less than 10%, the risk of reactor jump caused by the signal fluctuation exists;
meanwhile, aiming at the logic optimization of the TXP side, the risk that the ATWT protection logic of the TXP side is triggered to jump the stack due to signal fluctuation can be reduced;
aiming at the change of the logic, the current output trends are respectively detected on the TXS side and the TXP side by adopting a step change signal near an injection range switching point at the front end, and whether the range switching is smooth or not is verified.
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The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of analog before switch variation;
FIG. 2 is a graph of measurement after switching of the analog quantity to the switching quantity;
FIG. 3 is a DCS side signal output latching logic diagram;
FIG. 4 is a diagram of the transmission paths of the analog quantity signal and the switching quantity signal according to the present invention;
FIG. 5 is a range code look-up table of the intermediate range of the nuclear power plant detection system of the present invention;
FIG. 6 is a schematic diagram of the logic optimization method of the present invention on the TXS side;
FIG. 7 is a graph comparing the relative rates of the isolation modules of the present invention;
FIG. 8 is a schematic diagram of the logic verification method of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Fig. 3 is a schematic diagram of the transmission of the analog quantity signal and the switching value signal in the nuclear power plant detection system of the present invention.
The intermediate range detector measures neutron current signals escaping out of the reactor, the neutron current signals are transmitted to a nuclear instrumentation system (RPN) cabinet through a cable switching device, a signal cable and a nuclear island penetration piece, the neutron current signals are converted into analog quantity signals represented by 0-10V voltage and switching quantity signals representing range codes A1, A2 and A3, parity check bits A4 and effective bits A5 through 1E-11A-1E-3A currents output by the probe in the RPN cabinet through an amplification processing module of a current processing plate ACCG 4.
The analog quantity signal is sent out through a filtering module, an analog quantity conversion module and an isolation module of the current processing plate ACCG4, the switching value signal is sent out through a 16ITOR optical isolation module and an I.32STOR relay module, and the RPN cabinet sends the analog quantity signal and the switching value signal to a Reactor Protection System (RPS) and an anticipated transient state (ATWT) which does not stop the reactor urgently to participate in related control and protection logic.
As shown in fig. 5, the RPN cabinet middle range signal spans 9 orders of magnitude (range: 1E-11A to 1E-3A), in order to ensure the linearity and accuracy of the measurement signal of the RPN cabinet, the processing circuit sets 7 automatic switching ranges, the signal processing board of the current processing board ACCG4 automatically changes the range according to the magnitude of the current signal, and the current signal of the middle range is divided into A, B parts for transmission by adopting the principle of segmented transmission, and then the actual current value is calculated according to the following formula:
I＝A*10(B-11)
wherein, I is the actual current of the middle range; a is a voltage signal (characterized by 0-10V) corresponding to the current in the current quantity; b is three-bit binary range code.
Meanwhile, the current processing board ACCG4 is designed with a valid bit a5 for locking current output when the intermediate range is switched in the range, so as to prevent current disturbance caused by inconsistent analog quantity and switching quantity change time during switching. The duration of the valid bit a5 is mainly determined by the time required for the current processing board ACCG4 to switch, so that the signal output locking time can completely cover the span switching time, and the signal output fluctuation during the span switching process is avoided.
As shown in fig. 6, in this example, on the TXS side, the judgment of the change of any range code a1, a2, A3 is added, and any change of any range code a1, a2, A3 is regarded as the range switching, the nuclear power plant detection system intermediate range signal output is blocked, one acquisition cycle is delayed by 50ms, and when the change of the effective bit a5 of the nuclear power plant detection system intermediate range is detected, the judgment of the change of the range code a1, a2, A3 is not performed.
Specifically, since the TXS side acquisition period is 50ms, the RPN cabinet side acquisition period is 10ms, and there is a case that the TXS side cannot acquire the valid bit a5, in the sampling time interval from T2 to T3, the problem of analog disturbance caused by the fact that the valid bit a5 is not acquired in the range switching process is solved by adding the judgment logic for detecting the changes of the range codes a1, a2, A3 and the valid bit a5, and the main logic content is as follows: by adding the change judgment of any range code A1, A2 and A3, if any range code A1, A2 and A3 is detected to be changed, the intermediate range is considered to be switched, at the moment, the output of the RPN intermediate range signal is locked, and one acquisition period is delayed by 50 ms.
In addition, when the switch is detected by the valid bit a5 of the original lock logic of the intermediate range, the new logic of the new increment, namely the range codes a1, a2 and A3, is locked, and the new increment logic, namely the range codes a1, a2 and A3, is executed only when the valid bit a5 is not detected.
It can be understood that, after the analog quantity is changed to a certain value, the levels of the range codes a1, a2, A3 and the valid bit a5 start to change (the levels of the range codes a5 and the valid bit a5 are designed to be locked out at the moment when the analog quantity is changed), the old logic detects that the quantity of the valid bit a5 is changed, and the valid bit a5 is in a low level, so that the output is locked out, but the method has the defect that a detection period of 50ms cannot detect that the valid bit a5 which lasts for about 10ms, so that new logic, namely the range codes a1, a2 and a 35 3 are added, and the probability that the locked out logic is triggered when any one of the range codes a1, a2, A3 and the valid bit a5 is detected to be changed is greatly reduced.
In this embodiment, on the TXP side, the logic for span change blocking current signal output is added, while the delay logic for valid bit a5 signal blocking current signal output is added.
Specifically, referring to the RPS side logic configuration mode, combining the characteristics of the TXP side processing signal, the original TXP side is not designed with the locking signal of the effective bit a5, so that the problem of large signal fluctuation exists all the time, the new logic is added with the locking signal similar to the TXS side, and a mode slightly different from the TXS side is adopted, when the level of the locking signal of the effective bit a5 is low, the high level is recovered after delaying for 50ms, so that the existence of the effective bit a5 can be detected, that is, the logic of range change locking current signal output is increased, and the delay logic of the output of the locking current signal of the effective bit a5 is increased at the same time, so as to avoid the situation that the effective bit a5 signal cannot be acquired in one sampling period. The TXP-side and TXS-side valid bits a5 are both from the valid bit a5 output from the front-end current processing board ACCG 4.
As shown in fig. 7, the isolation module used in this embodiment has a complete response time of 4 to 6ms, a 10 to 90% response time of 0.1 to 2ms, and is tested by reselecting the MACX MCRUI-UI-SP isolation module of pheonix corporation, and by testing the analog isolation module data of several models, the MACX MCRUI-UI-SP module has a complete response time of 4 to 6ms, and a 10 to 90% response time of 0.1 to 2m, and about 2ms, which can meet the corresponding requirements of the field device, it can be understood that isolation modules of other models and specifications can be used as long as the relevant requirements are met, and no specific limitation is made here.
As shown in fig. 8, the present invention also includes verifying the modified logic function, injecting a certain amount of test signal into the front end of the measurement cabinet, where the current on the analog probe side is near the span switching point, and using a current signal with cyclic injection step change to make the intermediate span of the nuclear power plant detection system frequently switch between spans, and simultaneously monitoring whether the output signal waveform is smooth in transition on the TXS side and the TXP side, and verifying the locking function of the valid bit a5 signal to the signal output when the spans are switched.
After the range switching logic of the intermediate range of the nuclear power plant detection system is optimized, the signal fluctuation of the intermediate range signal during range switching can be effectively reduced, and even when the nuclear power is less than 10%, the risk of reactor jump caused by the signal fluctuation exists.
Meanwhile, aiming at the logic optimization of the TXP side, the risk that the ATWT protection logic of the TXP side is triggered to jump due to signal fluctuation can be reduced.
Aiming at the change of the logic, the current output trends are respectively detected on the TXS side and the TXP side by adopting a step change signal near an injection range switching point at the front end, and whether the range switching is smooth or not is verified.
The method for optimizing and verifying the range switching logic of the intermediate range of the nuclear measurement system is suitable for the logic algorithm of commercial units of all units of the current wide-range nuclear group, and after the logic improvement of the intermediate range of the RPN cabinet, the stability of equipment operation can be greatly improved, the risk of unit stack jump caused by signal flash during the range switching of the intermediate range of the RPN cabinet is reduced, and the reliability of the equipment is improved.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (4)
1. A method for optimizing and verifying the range switching logic of the intermediate range of a nuclear measurement system is characterized in that,
the method comprises the steps that a middle-range detector measures neutron current signals escaping out of a reactor, the neutron current signals are transmitted to a nuclear instrumentation system (RPN) cabinet through a cable switching device, a signal cable and a nuclear island penetrating piece, the neutron current signals convert 1E-11A-1E-3A currents output by a probe into analog quantity signals represented by 0-10V voltages and switching quantity signals representing range codes A1, A2 and A3, parity check bits A4 and effective bits A5 through an amplification processing module of a current processing plate ACCG4 in the RPN cabinet;
the analog quantity signal is sent out through a filtering module, an analog quantity conversion module and an isolation module of a current processing plate ACCG4, and the switching value signal is sent out through a 16ITOR optical isolation module and an I.32STOR relay module;
on the TXS side, judgment of changes of any range code A1, A2 and A3 is added, and any change of any range code A1, A2 and A3 is considered as range switching, so that the output of a middle range signal of the nuclear power plant detection system is locked, and one acquisition cycle is delayed by 50 ms;
on the TXP side, the logic for span change blocking current signal output is increased, while the delay logic for the valid bit a5 signal blocking current signal output is increased.
2. The method for optimizing and verifying the switching logic of the nuclear measurement system intermediate range is characterized in that on the TXS side, if the switching is detected by the valid bit A5 of the nuclear power plant detection system intermediate range, the change judgment is not carried out on the range codes A1, A2 and A3.
3. The method for optimizing and verifying the range switching logic of the nuclear power plant detection system intermediate range is characterized by further comprising verifying the modified logic function, injecting a certain amount of test signals into the front end of the measurement cabinet, simulating the current at the probe side to be near the range switching point, and adopting a current signal with cyclic injection step change to enable the nuclear power plant detection system intermediate range to be frequently switched between ranges, simultaneously monitoring whether the waveform of an output signal is smooth in transition at the TXS side and the TXP side, and simultaneously verifying the locking function of the effective bit A5 signal to the signal output when the ranges are switched.
4. The method for optimizing and verifying span switching logic of nuclear measurement system middle span according to claim 1, characterized in that the full response time of the isolation module is 4-6 ms, and the 10-90% response time is 0.1-2 ms.
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|---|---|---|---|---|
| CN111679105A (en) * | 2020-04-29 | 2020-09-18 | 深圳市科陆精密仪器有限公司 | Range switching method for electric meter, electric meter and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100080334A1 (en) * | 2008-09-30 | 2010-04-01 | Korea Power Engineering Company, Inc. | Method and apparatus for verifying performance of control system of nuclear power plant |
| CN104485143A (en) * | 2014-11-13 | 2015-04-01 | 大亚湾核电运营管理有限责任公司 | Processing method and system of nuclear power plant distributed control system |
| GB2544355A (en) * | 2015-11-12 | 2017-05-17 | China Nuclear Power Eng Co Ltd | Diverse actuation system and method and diverse protection system in a nuclear power plant |
| CN108918954A (en) * | 2018-04-17 | 2018-11-30 | 广东核电合营有限公司 | Range signal processing method and system among a kind of Nuclear Instrument measuring system |
-
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100080334A1 (en) * | 2008-09-30 | 2010-04-01 | Korea Power Engineering Company, Inc. | Method and apparatus for verifying performance of control system of nuclear power plant |
| CN104485143A (en) * | 2014-11-13 | 2015-04-01 | 大亚湾核电运营管理有限责任公司 | Processing method and system of nuclear power plant distributed control system |
| GB2544355A (en) * | 2015-11-12 | 2017-05-17 | China Nuclear Power Eng Co Ltd | Diverse actuation system and method and diverse protection system in a nuclear power plant |
| CN108918954A (en) * | 2018-04-17 | 2018-11-30 | 广东核电合营有限公司 | Range signal processing method and system among a kind of Nuclear Instrument measuring system |
Non-Patent Citations (1)
| Title |
|---|
| 马省委;: "某核电厂未能紧急停堆的预期瞬态解析" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111679105A (en) * | 2020-04-29 | 2020-09-18 | 深圳市科陆精密仪器有限公司 | Range switching method for electric meter, electric meter and storage medium |
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