CN117012423A - Nuclear power station reactor protection system channel test optimization method and control equipment - Google Patents

Nuclear power station reactor protection system channel test optimization method and control equipment Download PDF

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Publication number
CN117012423A
CN117012423A CN202310844472.4A CN202310844472A CN117012423A CN 117012423 A CN117012423 A CN 117012423A CN 202310844472 A CN202310844472 A CN 202310844472A CN 117012423 A CN117012423 A CN 117012423A
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channel
variation
test
analog quantity
nuclear power
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李广
万磊
何开兵
刘建军
王雪松
李东
裴建设
杨志超
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Taishan Nuclear Power Joint Venture Co ltd
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Taishan Nuclear Power Joint Venture Co ltd
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/001—Computer implemented control
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/04—Safety arrangements
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/08—Regulation of any parameters in the plant
    • G21D3/10—Regulation of any parameters in the plant by a combination of a variable derived from neutron flux with other controlling variables, e.g. derived from temperature, cooling flow, pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

The invention discloses a nuclear power station reactor protection system channel test optimization method and control equipment, wherein the method comprises the following steps: s10, classifying a plurality of channels according to the characteristics of transmission signals of the channels in an RPR system; s20, carrying out T1 test on the channel of the specific type periodically according to the classification result so as to verify whether the channel of the specific type is normal or not. The invention can obviously reduce the number of channels required to be subjected to T1 test in the RPR system, is beneficial to reducing the workload of test personnel and reducing the risk of human error, thereby obviously shortening the time required by the channel test of the RPR system.

Description

Nuclear power station reactor protection system channel test optimization method and control equipment
Technical Field
The invention relates to the technical field of nuclear power station reactor protection systems, in particular to a method for optimizing a channel test of a nuclear power station reactor protection system and control equipment.
Background
The nuclear power station reactor protection system (RPR system for short) has a complex structure, four rows of distribution, up to 1089 instrument channels, high risk of channel test (T1 test for short) and unavailable instrument channels during the test, and if each channel needs to perform a T1 test for 18 months according to the result of Probability Safety Analysis (PSA) according to the existing T1 test method, so as to ensure that the instrument signal transmission channel is available.
The main steps of the T1 test include: firstly, locking the channel in downstream logic to prevent misoperation of equipment in the test process; then injecting standard signals into the front end of the signal modulation equipment; recording measured values on a digital instrument control system (DCS system for short) of the nuclear power station, calculating deviation, and comparing the deviation with a standard to obtain a test result; finally, the lock in the logic is released, and the sensor channel is restored to be available. The test method needs to frequently implement repeated tests, needs a worker to cut off the connection between the instrument (or the sensor) on the relevant channel and the DCS system, and needs 20 minutes on average for each test, so that part of the instruments are not available for too long, a large amount of wire disassembling work is needed, the time required for the test is too long, risks of human errors such as wire connection error and wire disassembly are greatly increased, the removed instruments cannot be used any more generally, that is, the existing T1 test method can effectively verify whether the channel is abnormal or not, but has the defects of long test time consumption, high test error rate, high test cost and the like.
Disclosure of Invention
The invention aims to solve the technical problem of providing a nuclear power station reactor protection system channel test optimization method and control equipment.
The technical scheme adopted for solving the technical problems is as follows: a method for optimizing a channel test of a reactor protection system of a nuclear power station is constructed, which comprises the following steps:
s10, classifying a plurality of channels according to the characteristics of transmission signals of the channels in an RPR system;
s20, carrying out T1 test on the channel of the specific type periodically according to the classification result so as to verify whether the channel of the specific type is normal or not.
Preferably, the S10 includes:
s101, screening channels with redundant signal deviation detection functions from the channels;
s102, judging whether a first condition is met according to a signal of a channel with a redundant signal deviation detection function in a previous fuel period, and if so, determining the type of the channel as a first type;
s103, judging whether a channel which does not have a redundant signal deviation detection function or does not meet a first condition according to a signal of the channel in a previous fuel period, and if so, determining the type of the channel as a second type;
s104, judging whether the analog quantity channel which does not meet the second condition is carried out or is to be subjected to an input loop test, and if so, determining the channel as a third type;
s105, determining a non-analog quantity channel which does not meet the second condition or an analog quantity channel which does not carry out input loop test as a fourth type.
Preferably, in the step S102, the determining whether the first condition is satisfied according to the signal of the channel in the previous fuel cycle includes:
if the channel with the redundant signal deviation detection function is an analog quantity channel, judging whether the variation of the channel at different moments in the fuel period is larger than a preset first variation, and if the channel with the redundant signal deviation detection function is a switching value channel, judging whether the state variation of the switching value of the channel is consistent with a first expected state variation;
if the variation of the related analog quantity channel is larger than the first variation or the state variation of the related switching quantity channel is consistent with the first expected state variation, judging that the corresponding channel meets the first condition;
and if the variation of the related analog quantity channel is not larger than the first variation or the state variation of the related switching quantity channel is inconsistent with the first expected state variation, judging that the corresponding channel does not meet the first condition.
Preferably, the first variation is set according to a maximum allowable deviation value preset in the redundant signal deviation detecting function.
Preferably, in the step S103, the determining whether the channel satisfies the second condition according to the signal of the channel in the previous fuel cycle includes:
if the channel is an analog channel, acquiring the variation of the channel at different moments, and judging whether the variation is larger than a preset second variation or not; if the channel is a switching value channel, acquiring the state change of the channel, and judging whether the state change is consistent with a second expected state change or not;
if the change quantity of the related analog quantity channel is larger than the second change quantity or the state change of the related switching quantity channel is consistent with the second expected state change, judging that the corresponding channel meets the second condition;
and if the variation of the related analog quantity channel is not larger than the second variation or the state variation of the related switching quantity channel is inconsistent with the second expected state variation, judging that the corresponding channel does not meet the second condition.
Preferably, the second variation is 5%.
Preferably, in the S104, the input loop test includes:
and inputting preset verification parameters to the instrument on the analog quantity channel to obtain an actual measurement value of the related analog quantity channel, calculating measurement value precision by the preset verification parameters and the actual measurement value, judging whether the measurement value precision accords with a corresponding precision standard, if so, judging that the corresponding analog quantity channel passes verification, otherwise, judging that the corresponding analog quantity channel does not pass verification.
Preferably, the S20 includes:
s201, aiming at the first type of channel, monitoring whether the channel is normal or not in real time through the redundant signal deviation detection module;
s202, aiming at the second type of channel, periodically monitoring the signal of the channel in the current fuel cycle, and verifying and judging whether the channel is normal or not according to the monitoring result;
s203, aiming at the channel of the third type, judging whether the channel is normal or not according to an input loop test result;
s204, aiming at the channel of the fourth type, a T1 test is regularly carried out on the channel so as to judge whether the channel is normal or not.
The invention also constructs a computer storage medium storing a computer program which when executed by a processor implements the steps of the nuclear power plant reactor protection system channel test optimization method described above.
The invention also constructs a control device which comprises a processor and a memory storing a computer program, wherein the processor realizes the steps of the nuclear power station reactor protection system channel test optimization method when executing the computer program.
By implementing the technical scheme of the invention, the channels are classified according to the characteristics of the transmission signals of the channels in the RPR system, so that the T1 test is periodically carried out on the channels of the specific type according to the classification result, thereby verifying whether the channels of the specific type are normal, obviously reducing the number of the channels needing to be subjected to the T1 test in the RPR system, being beneficial to reducing the workload of testers and reducing the risk of human error, obviously shortening the time required by the channel test of the RPR system, being beneficial to reducing the labor cost and the cost of test consumables, and playing a positive role in improving the stability, the reliability and the economic benefit of the RPR system.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method of nuclear power plant reactor protection system channel test optimization in some embodiments of the invention;
fig. 2 is a flow chart of step S10 in some embodiments of the invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings.
It should be noted that the flow diagrams depicted in the figures are merely exemplary and do not necessarily include all of the elements and operations/steps, nor are they necessarily performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the order of actual execution may be changed according to actual situations.
The block diagrams depicted in the figures are merely functional entities and do not necessarily correspond to physically separate entities. That is, the functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
FIG. 1 is a flow chart of a method for optimizing a nuclear power plant reactor protection system channel test in accordance with some embodiments of the present invention, which may be applied to a processor of a digital instrument control system of a nuclear power plant, including step S10 and step S20.
The step S10 includes: the channels are classified according to the characteristics of transmission signals of the channels in the RPR system.
The channel of the RPR system may have a fault that the signal is frozen (meaning that the analog or switching value transmitted by the channel is not changed due to the random group state change, i.e. the signal is not changed), and the RPR system monitors part of the channels in daily operation and periodically performs detection measures such as input loop test, so as to ensure that the part of the channels can timely cope with the fault. In this step, a plurality of channels in the RPR system are classified based on the difference in detection measures so as to be verified for different types of channels.
Step S20 includes: and according to the classification result, a T1 test is periodically carried out on the channel of the specific type so as to verify whether the channel of the specific type is normal or not.
In the step, the number of channels needing T1 test in the RPR system can be obviously reduced by only carrying out periodical T1 test on the channels of a specific type, thereby being beneficial to reducing the workload of testers and the risk of human error, obviously shortening the time required by the channel test of the RPR system, being beneficial to reducing the labor cost and the test consumable cost and playing a positive role in improving the stability, the reliability and the economic benefit of the RPR system.
In some embodiments, as shown in fig. 2, step S10 may include step S101, step S102, step S103, step S104, and step S105.
The step S101 includes: and screening the channels with the redundant signal deviation detection function from the plurality of channels.
In this step, it should be noted that, in order to ensure parameter accuracy in the RPR system, it is necessary to collect parameters (such as pressure and temperature) corresponding to a plurality of meters or sensors at the same time, or transmit switching values of the same function command through a plurality of switching value channels, and for analog values of a plurality of meters for measuring the same parameter, the analog values correspond to redundant analog values of the parameter. The parameter value principle is as follows: and taking the second maximum value (namely the second maximum value) among the redundant analog quantities corresponding to the parameters as a measured value. The redundant signal deviation detection function is designed for a channel for transmitting redundant analog quantity, and the working principle comprises the following steps: for the analog quantity, when the absolute value of the deviation between a certain redundant analog quantity and the next maximum value in each corresponding redundant analog quantity is larger than the preset maximum allowable deviation value, the channel of the redundant analog quantity is indicated to be possibly faulty, related equipment (such as a monitoring card of the parameter or alarm equipment in an RPR system) is controlled to generate an alarm signal, and a worker is informed of executing corresponding processing measures in time; for the switching value, when the state of one switching value is inconsistent with the states of other switching values in a plurality of switching values transmitting the same function command, it can be presumed that the channel corresponding to the switching value with inconsistent states is possibly faulty, and the related equipment is controlled to alarm.
Alternatively, the maximum allowable deviation value is 5%.
Step S102 includes: for a channel with a redundant signal deviation detection function, judging whether a first condition is met according to a signal of the channel in a previous fuel period, and if so, determining the type of the channel as a first type.
Further, in some embodiments, determining whether the first condition is satisfied based on the signal of the passage in the previous fuel cycle in step S102 includes:
if the channel with the redundant signal deviation detection function is an analog quantity channel, judging whether the variation of the channel at different moments in the fuel period is larger than a preset first variation, and if the channel with the redundant signal deviation detection function is a switching value channel, judging whether the state variation of the switching value of the channel is consistent with a first expected state variation;
if the variation of the related analog quantity channel is larger than the first variation or the state variation of the related switching quantity channel is consistent with the first expected state variation, judging that the corresponding channel meets a first condition;
and if the variation of the related analog quantity channel is not larger than the first variation or the state variation of the related switching quantity channel is inconsistent with the first expected state variation, judging that the corresponding channel does not meet the first condition.
In this step, as for the analog channels having the redundant signal deviation detecting function (i.e., the related analog channels), it is known from the operation principle of the redundant signal deviation detecting function that when the variation of the parameter corresponding to the measurement of a certain analog channel having the redundant signal deviation detecting function at different times in the fuel cycle is not large (e.g., not greater than the maximum allowable deviation value), the variation of each redundant analog of the parameter is not large in theory, so that even if the signal of a certain redundant analog is frozen, the redundant signal deviation detecting function will not control the related device to generate an alarm signal, that is, in this case, the redundant signal deviation detecting function cannot accurately monitor whether the channel is normal. It will be appreciated that when the variation of the analog channels at different times is greater than a certain value, it is ensured that the deviation between the normal analog channel and the analog channel with frozen signal is greater than the maximum allowable deviation value, and the influence of the redundant signal deviation detection function can be eliminated, so that the redundant signal deviation detection function can be used to monitor the channels meeting the condition (i.e. meeting the first condition) without T1 testing the channels.
In order to ensure that the redundant signal deviation detection function can monitor whether the channel is normal, the first variation needs to meet a certain condition, and the magnitude of the first variation is related to the maximum allowable deviation value, so that the first variation can be set according to the maximum allowable deviation value preset in the redundant signal deviation detection function.
Specifically, it should be noted that, since the deviation of the redundant analog quantity may be an upward deviation (corresponding to a case of greater than the next largest value) or a downward deviation (corresponding to a case of less than the next largest value), and the measured value of the parameter takes the next largest value between the redundant analog quantities thereof, it is known through analysis that if the variation of a certain parameter in the maximum size within the fuel cycle does not exceed 3 times of the maximum allowable deviation value, in the most extreme case, the redundant signal deviation detecting function still cannot recognize the channel failure of the signal freezing, and therefore, in order to cope with such an extreme case, the first variation may be set to a value of not less than 3 times of the maximum allowable deviation value.
For a switching value channel (i.e., a relevant switching value channel) having a redundant signal deviation detecting function, if an expected value of the switching value is unchanged in a fuel cycle, such as a pressure vessel overpressure signal, if no overpressure occurs in the fuel cycle, the state of the signal is unchanged, that is, if the type of switching value is frozen, whether the signal is normal or not cannot be detected by the redundant signal deviation detecting function, otherwise, if the state of the switching value is changed in the fuel cycle, if the state change of the switching value is inconsistent with a first expected state change, the redundant signal deviation detecting function will alarm, so that whether the switching value channel is normal or not can be detected by the redundant signal deviation detecting function without T1 test on the channels.
Step S103 includes: for a channel without a redundant signal deviation detection function or a channel which does not meet a first condition, judging whether the channel meets a second condition according to the signal of the channel in the previous fuel period, and if so, determining the type of the channel as a second type.
Further, in some embodiments, determining whether the passage satisfies the second condition based on the signal of the passage in the previous fuel cycle in step S103 includes:
if the channel is an analog channel, acquiring the variation of the channel at different moments, and judging whether the variation is larger than a preset second variation; if the channel is a switching value channel, acquiring the state change of the channel, and judging whether the state change is consistent with a second expected state change or not;
if the variation of the related analog quantity channel is larger than the second variation or the state variation of the related switching quantity channel is consistent with the second expected state variation, judging that the corresponding channel meets a second condition;
and if the variation of the related analog quantity channel is not larger than the second variation or the state variation of the related switching quantity channel is inconsistent with the second expected state variation, judging that the corresponding channel does not meet the second condition.
In this step, a large number of analog quantities and switching quantities are subject to a change in the state of the unit in one fuel cycle, resulting in a change in the signal.
Regarding the analog quantity, considering the influence of the maximum uncertainty factor in the RPR system, the maximum variation of the measured value corresponding to the analog quantity is generally not more than 2%, and the measured value is displayed on the DCS system after rounding, so that an uncertainty is introduced, and the variation range of the uncertainty may reach 2%, because the two uncertainties are uncorrelated, the variation range of the total uncertainty should be accumulated in a linear manner, that is, the variation range of the total uncertainty may reach 4%, if the analog quantity varies by less than 4% in the whole fuel period, the operation of the system is not influenced temporarily even if the channel signal of the analog quantity is frozen, and therefore, the related safety system and staff cannot find the channel abnormality of the analog quantity in time, therefore, the influence of the uncertainty can be eliminated only when the variation of the analog quantity needs to be ensured to be greater than a certain value (that is, the second variation) in the fuel period, and the freezing of the channel signal of the analog quantity is eliminated.
In some embodiments, the second variation may be set to 5% for conservation reasons, so that analog channels in which signal freezing is likely to occur may be separated into channels of the second type as much as possible after performing step S103.
For the switching value, if the expected value of the switching value is unchanged in the fuel period, even if the channel signal of the switching value is frozen, the operation of the system is not influenced temporarily, so that related safety systems and staff cannot find the abnormality of the switching value channel in time, therefore, the state change of the switching value channel is required to be ensured to be consistent with the second expected state change in the fuel period (namely, the switching value transmitted by the switching value channel is changed in the fuel period and the state change is consistent with the expected state), and the freezing of the switching value channel signal can be eliminated.
Step S104 includes: and judging whether the analog quantity channel which does not meet the second condition is carried out or is to be subjected to an input loop test, and if so, determining the channel as a third type.
In this step, if the analog quantity channel is subjected to the input loop test in each fuel cycle, it is verified whether the analog quantity transmitted by the analog quantity channel is normal or not by the input loop test, and if it is normal, it is verified that the channel is also normal, so that the T1 test is not required.
Further, in some embodiments, the input loop test in step S104 includes: and inputting preset verification parameters to the instrument on the analog quantity channel to obtain an actual measurement value of the related analog quantity channel, presetting the verification parameters and the actual measurement value to calculate measurement value precision, judging whether the measurement value precision meets corresponding precision standards, if so, judging that the corresponding analog quantity channel passes verification, otherwise, judging that the corresponding analog quantity channel does not pass verification.
Specifically, taking a pressure sensor as an example, a set pressure (corresponding to a preset calibration parameter) can be input to the pressure sensor, then an actual measurement value actually input to the system is obtained, then the measurement value precision is calculated according to the preset calibration parameter and the actual measurement value, finally the measurement value precision is compared with the precision standard of the pressure sensor, and if the measurement value precision meets the requirement, the pressure sensor and an analog quantity channel thereof are indicated to be normal. In addition, the accuracy standard is set according to the type of the instrument and the requirement.
Step S105 includes: for a non-analog channel that does not satisfy the second condition, or an analog channel that does not undergo the input loop test, the channel is determined as the fourth type.
In some embodiments, step S20 may include the steps of:
s201, aiming at a first type channel, monitoring whether the channel is normal or not in real time through a redundant signal deviation detection module.
S202, aiming at a second type of channel, periodically monitoring a signal of the channel in the current fuel cycle, and verifying and judging whether the channel is normal or not according to a monitoring result;
s203, aiming at the channel of the third type, judging whether the channel is normal or not according to the input loop test result;
s204, aiming at the channel of the fourth type, a T1 test is regularly carried out on the channel so as to judge whether the channel is normal or not.
The invention also provides a computer storage medium which stores a computer program, and the computer program realizes the steps of the method for optimizing the nuclear power station reactor protection system channel test provided by the implementation of the invention when being executed by a processor.
The invention also provides control equipment, which comprises a processor and a memory storing a computer program, wherein the processor realizes the steps of the nuclear power station reactor protection system channel test optimization method provided by the embodiment of the invention when executing the computer program.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The method for optimizing the channel test of the reactor protection system of the nuclear power station is characterized by comprising the following steps of:
s10, classifying a plurality of channels according to the characteristics of transmission signals of the channels in an RPR system;
s20, carrying out T1 test on the channel of the specific type periodically according to the classification result so as to verify whether the channel of the specific type is normal or not.
2. The nuclear power plant reactor protection system channel test optimization method according to claim 1, wherein S10 includes:
s101, screening channels with redundant signal deviation detection functions from the channels;
s102, judging whether a first condition is met according to a signal of a channel with a redundant signal deviation detection function in a previous fuel period, and if so, determining the type of the channel as a first type;
s103, judging whether a channel which does not have a redundant signal deviation detection function or does not meet a first condition according to a signal of the channel in a previous fuel period, and if so, determining the type of the channel as a second type;
s104, judging whether the analog quantity channel which does not meet the second condition is carried out or is to be subjected to an input loop test, and if so, determining the channel as a third type;
s105, determining a non-analog quantity channel which does not meet the second condition or an analog quantity channel which does not carry out input loop test as a fourth type.
3. The method for optimizing a nuclear power plant reactor protection system channel test according to claim 2, wherein in S102, the determining whether the first condition is satisfied according to the signal of the channel in the previous fuel cycle includes:
if the channel with the redundant signal deviation detection function is an analog quantity channel, judging whether the variation of the channel at different moments in the fuel period is larger than a preset first variation, and if the channel with the redundant signal deviation detection function is a switching value channel, judging whether the state variation of the switching value of the channel is consistent with a first expected state variation;
if the variation of the related analog quantity channel is larger than the first variation or the state variation of the related switching quantity channel is consistent with the first expected state variation, judging that the corresponding channel meets the first condition;
and if the variation of the related analog quantity channel is not larger than the first variation or the state variation of the related switching quantity channel is inconsistent with the first expected state variation, judging that the corresponding channel does not meet the first condition.
4. A nuclear power plant reactor protection system channel test optimization method according to claim 3, wherein the first variation is set according to a maximum allowable deviation value preset in the redundant signal deviation detection function.
5. The method for optimizing a nuclear power plant reactor protection system channel test according to claim 2, wherein in S103, the determining whether the channel satisfies the second condition according to the signal of the channel in the previous fuel cycle includes:
if the channel is an analog channel, acquiring the variation of the channel at different moments, and judging whether the variation is larger than a preset second variation or not; if the channel is a switching value channel, acquiring the state change of the channel, and judging whether the state change is consistent with a second expected state change or not;
if the change quantity of the related analog quantity channel is larger than the second change quantity or the state change of the related switching quantity channel is consistent with the second expected state change, judging that the corresponding channel meets the second condition;
and if the variation of the related analog quantity channel is not larger than the second variation or the state variation of the related switching quantity channel is inconsistent with the second expected state variation, judging that the corresponding channel does not meet the second condition.
6. The nuclear power plant reactor protection system channel test optimization method of claim 5, wherein the second variation is 5%.
7. The nuclear power plant reactor protection system channel test optimization method according to claim 2, wherein in S104, the input loop test includes:
and inputting preset verification parameters to the instrument on the analog quantity channel to obtain an actual measurement value of the related analog quantity channel, calculating measurement value precision by the preset verification parameters and the actual measurement value, judging whether the measurement value precision accords with a corresponding precision standard, if so, judging that the corresponding analog quantity channel passes verification, otherwise, judging that the corresponding analog quantity channel does not pass verification.
8. The nuclear power plant reactor protection system channel test optimization method according to any one of claims 2 to 7, wherein S20 includes:
s201, aiming at the first type of channel, monitoring whether the channel is normal or not in real time through the redundant signal deviation detection module;
s202, aiming at the second type of channel, periodically monitoring the signal of the channel in the current fuel cycle, and verifying and judging whether the channel is normal or not according to the monitoring result;
s203, aiming at the channel of the third type, judging whether the channel is normal or not according to an input loop test result;
s204, aiming at the channel of the fourth type, a T1 test is regularly carried out on the channel so as to judge whether the channel is normal or not.
9. A computer storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the nuclear power plant reactor protection system channel test optimization method of any one of claims 1 to 8.
10. A control device comprising a processor and a memory storing a computer program, the processor implementing the steps of the nuclear power plant reactor protection system channel test optimization method of any one of claims 1 to 8 when the computer program is executed.
CN202310844472.4A 2023-07-10 2023-07-10 Nuclear power station reactor protection system channel test optimization method and control equipment Pending CN117012423A (en)

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