CN108805340B - Method, device and system for optimizing output of nuclear power fluctuation limiting unit - Google Patents
Method, device and system for optimizing output of nuclear power fluctuation limiting unit Download PDFInfo
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Abstract
The invention is suitable for the technical field of reactor control and protection systems, and provides an optimization method, a device and a system for limiting unit output by nuclear power fluctuation, wherein the method comprises the following steps: collecting basic data of an out-of-pile nuclear instrument system; determining nuclear instrument system parameters according to the basic data; determining an acceptance criterion of an out-of-stack nuclear power indication calibration test RPN8 according to the parameter analysis of the nuclear instrument system; and starting the nuclear instrument system parameter adjustment according to the acceptance criterion. By the embodiment of the invention, the problems of large fluctuation range of the nuclear power and reduced output of the running power limiting unit can be solved.
Description
Technical Field
The invention belongs to the technical field of reactor control and protection systems, and particularly relates to an optimization method, device and system for limiting unit output by nuclear power fluctuation.
Background
The Nuclear Instrumentation system (RPN) of the Nuclear measurement system outside the pressurized water reactor is influenced by the characteristics of the reactor core, the Nuclear power indication fluctuation of the reactor core is large, the fluctuation amplitude close to 4 percent FP is generated at the end of the service life of the reactor, the fluctuation amplitude is overlarge, the protection fixed value of a control rod lifting locking signal C2 is easily triggered to alarm, the running power is reduced in order to avoid triggering the corresponding protection fixed value controlled by C2, and the output of a unit is limited.
Disclosure of Invention
In view of this, embodiments of the present invention provide an optimization method, an apparatus, and a system for limiting the output of a unit by nuclear power fluctuation, so as to solve the problems of large nuclear power fluctuation range and reduced output of the unit limited by operating power.
The first aspect of the embodiment of the present invention provides an optimization method for limiting unit output by nuclear power fluctuation, including:
collecting basic data of an out-of-pile nuclear instrument system;
confirming nuclear instrument system parameters according to the basic data;
determining an acceptance criterion of an out-of-stack nuclear power indication calibration test RPN8 according to the parameter analysis of the nuclear instrument system;
and starting the nuclear instrument system parameter adjustment according to the acceptance criterion.
A second aspect of the embodiments of the present invention provides an optimization apparatus for limiting output of a unit by nuclear power fluctuation, including:
the data acquisition unit is used for acquiring basic data of the out-of-pile nuclear instrument system;
the first data processing unit is used for confirming the nuclear instrument system parameters according to the basic data;
the second data processing unit is used for analyzing and determining the acceptance criterion of the nuclear power indication calibration test RPN8 of the out-of-stack nuclear measurement system according to the parameters of the nuclear instrument system;
and the execution unit is used for starting the parameter adjustment of the nuclear instrument system according to the acceptance criterion.
A third aspect of an embodiment of the present invention provides an out-of-stack nuclear instrumentation system, including: the method comprises the following steps of storing a computer program, storing a computer program in the memory, and running on the processor, wherein the processor realizes the steps of the optimization method for limiting the output of the unit by the nuclear power fluctuation when executing the computer program.
A fourth aspect of the embodiments of the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the steps of the optimization method for limiting the plant output by the nuclear power fluctuation.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: according to the embodiment of the invention, the basic data of the out-of-core nuclear instrument is collected, the parameters of the nuclear instrument system are determined according to the basic data, the executable acceptance criteria of RPN8 are determined according to the determined parameters of the nuclear instrument system, the adjustment of the parameters of the nuclear instrument system is started according to the determined acceptance criteria, the intervention operation is performed in advance before the self-nuclear power indicating peak value limits the unit output, the predicted deviation is corrected more accurately, the proportion of the deviation before the unit output is influenced is reduced, and the phenomenon that the unit output is controlled and the nuclear power peak value is avoided effectively.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of an implementation of an optimization method for limiting output of a unit by nuclear power fluctuation according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the distribution of deviation ratios before affecting the unit output according to the embodiment of the present invention;
FIG. 3 is a schematic flow chart of another implementation of the method for optimizing the output of the nuclear power fluctuation limiting unit according to the embodiment of the present invention;
FIG. 4 is an exemplary diagram of C2 control logic provided by an embodiment of the present invention;
FIG. 5 is a schematic diagram of an apparatus for optimizing nuclear power fluctuation limit unit output according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an off-stack nuclear instrumentation system provided by an embodiment 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.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, it is a schematic flow chart of an implementation of the optimization method for limiting the output of the unit by the nuclear power fluctuation provided in the embodiment of the present invention, where the method is applied to an implementation site of an out-of-core nuclear measurement system nuclear power indication calibration test RPN8, and the method may include the following steps:
and step S101, collecting basic data of the out-of-pile nuclear instrument system.
In the embodiment of the invention, the out-of-core nuclear instrument system can continuously detect the power, the power change and the power distribution condition of the reactor, and the nuclear detector is used for measuring the seed flux; the basic data includes: average neutron flux current information and thermal power.
Optionally, the collecting basic data of the out-of-pile nuclear instrument system includes:
a1, collecting an average neutron flux current signal of each channel of the nuclear instrument system power range outside the reactor;
and A2, collecting the thermal power of the reactor core.
In the embodiment of the invention, the power range of the out-of-pile nuclear instrument system has 4 identical independent measuring channels, the detector is a six-section ionization chamber, and six sections of seed current signals and total average neutron flux current signals of 4 paths can be measured. Core thermal power was measured by the thermal balance system KME.
In addition, data acquisition may not be performed when, for example: and during the ELPO or SO period, planning operation of power increase and decrease within three days recently, planning RPN12 or RPN8 within five days before and after, changing and balancing circulation in the cycle life MOL and 18 months before, and participating in peak regulation of the power grid. However, special-case power plants consider it necessary to increase the frequency of RPN8 without the above limitations (including guidelines), such as power generation being significantly affected.
And step S102, determining the nuclear instrument system parameters according to the basic data.
In an embodiment of the invention, the basic data comprises average neutron flux current information and thermal power; when the reactor is in a power running state, the nuclear power and the axial power deviation can be obtained through calculation, the KDC system replaces a centralized data processing system KIT, the average value of the four-channel six-section ionization chamber current of the nuclear instrument system can be obtained, and the nuclear instrument system parameters are confirmed and verified according to the nuclear power, the thermal power and a nuclear instrument system parameter calculation formula.
Optionally, the determining the nuclear instrumentation system parameter according to the basic data includes:
b1, calculating upper power and lower power according to the average neutron flux current signal;
b2, calculating the nuclear power and the out-of-stack axial power deviation according to the upper power and the lower power;
b3, if the deviation of the nuclear power and the thermal power meets a first preset condition, and the deviation of the out-of-stack axial power meets a second preset condition, determining that the nuclear instrument system parameters are feasible.
In an embodiment of the invention, the power of the upper half and the lower half of the ionization chamber, i.e. the upper power and the lower power, is calculated by an adder; calculating the nuclear power and the axial power deviation of the reactor according to the upper power and the lower power, and judging whether the deviation of the nuclear power and the thermal power meets a first preset condition and whether the axial power deviation meets a second preset condition, wherein the first preset condition is the deviation of the nuclear power and the thermal power maintaining balance, and the second preset condition is that the difference between the RPN reactor external axial power deviation and the reactor internal axial power deviation measured by the RIC system is within a preset error range.
If the first preset condition and the second preset condition are both met, the accuracy of the determined nuclear instrument system parameter can be judged to meet the requirement, and the determined nuclear instrument system parameter is feasible; the current of six sections of ionization chambers of each channel of the RPN is obtained by tracking through a KDC system, the required upper and lower currents are obtained through calculation, the coefficients of the unit are confirmed, the upper and lower powers without the previous nuclear instrument system parameters can be equivalently and indirectly obtained, the deviation obtained through verification by using a back calculation method is cancelled, the back calculation method of the operation of a cabinet door of the RPN is cancelled, the parameter giving time is saved, the working efficiency is improved, and the output capacity of the unit is improved.
And step S103, determining the acceptance criterion of the nuclear power indication calibration test RPN8 of the out-of-stack nuclear measurement system according to the parameter analysis of the nuclear instrument system.
In the embodiment of the invention, the acceptance criteria which can be implemented by the RPN8 experiment are judged and analyzed according to the confirmed nuclear instrument system parameters.
Optionally, the determining, according to the parameter analysis of the nuclear instrument system, the acceptance criterion of the RPN8 of the nuclear power indication calibration test of the off-core nuclear measurement system includes:
c1, inversely calculating new nuclear power according to the determined nuclear instrument system parameters, and acquiring a deviation value of the nuclear power and the absolute thermal rate;
c2, acquiring the proportion of the output of the limiting unit according to the deviation value;
and C3, determining the value range of the acceptance criterion of the RPN8 test according to the ratio.
In the embodiment of the present invention, a new nuclear power may be inversely calculated according to the determined nuclear instrumentation system parameter, and the deviation between the nuclear power and the thermal power may be obtained, as shown in fig. 2, which is a schematic diagram of distribution of the deviation in proportion before affecting the unit output, it can be seen that the deviation is greater than or equal to 100% of the FP power by 0.4%, the deviation is greater than or equal to 92% of the FP power by 0.6%, and the deviation is greater than or equal to 64% of the FP power by 0.6%, so from the perspective of reducing the limitation of the nuclear power peak value to the unit output, on the basis of keeping the normal RPN8 start control standard and program unchanged, the range value of the acceptance criterion of the RPN8 test frequency is increased, and may be 0.4-0.7% FP.
Optionally, the determining, according to the parameter analysis of the nuclear instrument system, the acceptance criterion of the RPN8 of the nuclear power indication calibration test of the off-core nuclear measurement system further includes:
d1, analyzing the times of confirming and adjusting the nuclear instrument system parameters according to the value range of the acceptance criterion;
d2, confirming acceptance criterion value according to the times.
In the embodiment of the present invention, as shown in table 1, determining the acceptance criterion as 0.4% FP or 0.5% FP will result in doubling the number and frequency of the confirmation and adjustment of the nuclear instrumentation system parameters, and increasing the field risk greatly. However, if it is 0.6% FP or 0.7% FP, the effect is substantially acceptable. Comprehensively considering the safety and economic influences, setting the new acceptance criterion as 0.7% FP, namely starting the confirmation and adjustment of the nuclear instrument system parameters when the maximum average deviation (considering the deviation direction) of the hotter power of the nuclear power is more than or equal to 0.7% FP when the condition RPN8 after the implementation frequency is increased.
And step S104, starting the adjustment of the nuclear instrument system parameters according to the acceptance criteria.
In the embodiment of the invention, after the new acceptance criterion is applied to the RPN8 with increased frequency, the nuclear instrument system parameters are confirmed and adjusted for 4.5 times on average in each cycle, the down-regulation frequency of the nuclear power indication is shortened to 17.3 days/time from 24.7 days/time on average, but the influence is compared with D2C14, which shows that the system parameters still fall within the experience range of the normal 18-month refueling balance cycle, the acceptance criterion is positioned at 0.7% FP, the intervention proportion before the unit output is limited by the nuclear power peak value is 64%, and the effective unit output is effectively avoided by the phenomenon that the unit output is limited by the nuclear power peak value.
Fig. 3 is an interactive flowchart of another method for optimizing the output of the nuclear power fluctuation-limited unit according to the embodiment of the present invention. The method may control triggering of a rod lift lockout signal C2 threshold, the method may include the steps of:
and step S301, acquiring a nuclear instrument system control rod lifting locking signal C2.
In the embodiment of the invention, the limit value of the RPN nuclear power corresponds to a corresponding limit value, namely the control rod lifting blocking signal C2 is 103% FP ± 1% FP, the control rod lifting blocking signal C2 is a bar lifting forbidding signal, and a nuclear power alarm of 102% FP is set on the RPN system, so that the RPN nuclear power peak limit value of 102% FP is controlled to avoid triggering the C2 alarm or blocking.
Optionally, the acquiring nuclear instrumentation system control rod lifting locking signal C2 includes:
collecting control rod lifting locking signals C2 of four cabinet channels of a nuclear instrument system RPN;
and performing logical operation on the control rod lifting locking signals C2 of the four cabinet channels to output one locking control signal or two locking control signals.
In the embodiment of the present invention, as shown in the schematic diagram of the C2 control logic shown in fig. 4, 4 power range channels of the RPN cabinet can output a threshold signal of C2, perform an or logic operation on the control rod lifting locking signals C2 of the four cabinet channels, and output a threshold signal; and one path of the output threshold signal is transmitted to a main control room for alarming, and the other path of the output threshold signal is transmitted to a nuclear power rod control RGL system for locking and lifting the rod. And after logical operation, two threshold signals are output, the relay frame of the RGL system is modified, and the control of locking rod lifting signals is carried out.
Optionally, after the step of acquiring the nuclear instrumentation system control rod lift locking signal C2, the method further comprises:
sending the control rod lifting locking signal C2 to a master control room alarm unit;
and adding fixed time delay to an alarm loop of the alarm unit.
In the embodiment of the invention, after the OR logic operation is carried out on the control rod lifting locking signals C2 of the four cabinet channels, the output threshold value signal is sent to the alarm unit of the main control room, and a delay link is added in the alarm loop of the alarm unit, so that the delay of one second can be increased, the power fluctuation duration time is in the peak value within one second, the alarm is not triggered, and the fluctuation of the nuclear power is reduced.
Optionally, after the step of sending the control rod lifting locking signal C2 to the master control room alarm unit, the method further includes:
and increasing the triggering condition of the control rod lifting locking signal C2 alarm in an alarm loop of an alarm unit.
In an embodiment of the invention, the alarm triggering logic of the C2 threshold may be modified to increase the triggering condition of the C2 threshold alarm, for example, RPN nuclear power greater than 103% FP and core thermal power (RCP009VE) greater than 2907MWt may be set.
Step S302, sending the locking signal C2 to a nuclear power rod position control system RGL.
In the embodiment of the invention, the rod position control system RGL of the nuclear power rod monitors the position of each bundle of control rods in a reactor core during the starting, power conversion and shutdown processes of the nuclear power plant; the reactor core reactivity is controlled by the movement of the control rod on the premise of ensuring the safety of the reactor, so as to meet the requirement of long-term operation of the reactor; the reactor keeps a flat power distribution in the operation process through an optimal rod lifting and inserting program; when the load change is met, adjusting the reactor power to follow the load change; when an accident occurs, the fast shutdown is realized and the proper shutdown margin is ensured. Upon receipt of the lockout signal C2, the lift control rods may be locked out.
Step S303 adds a fixed time delay to the locking control rod lift loop of the RGL system.
In an embodiment of the present invention, a fixed time delay is added to the locking control rod lift loop of the RGL system so that the control rod is not actually locked.
It should be noted that, within the technical scope of the present disclosure, other sequencing schemes that can be easily conceived by those skilled in the art should also be within the protection scope of the present disclosure, and detailed description is omitted here.
By the embodiment of the invention, intervention can be carried out before the output of the nuclear power indication peak limit unit, and the predicted deviation can be corrected more accurately; the intervention proportion can reach 64% before the unit output is controlled and the nuclear power peak value, the operation in an RPN protection cabinet is not needed, the RPN cabinet key flow is not needed to be borrowed, and the data reading and the input are not needed manually; the PRN8 works for a non-sensitive area without monitoring of a sensitive area; the working efficiency is improved, and the error risk is reduced; the parameter giving time is saved, and the working process is more automatic and digital.
Through the embodiment of the invention, the duration time of averagely influencing the unit output when the parameter calibration adjustment work of the nuclear instrument system is started each time is greatly reduced from the previous 5.19 days to 1.14 days, the average loss of the unit electric power when the parameter calibration adjustment work of the nuclear instrument system is started each time is greatly reduced from the previous 49 ten thousands of kilowatts to 8 ten thousands of kilowatts, each unit recovers 630 ten thousands of kilowatts per year, 4 digital RPN system units recover 2520 thousands of kilowatts per year, and the RMB is reduced to 1008 ten thousand yuan. Therefore, the method has remarkable effect on solving the problems of high RPN030MA nuclear power indication peak value and large fluctuation limit unit output, and effectively solves the problem of the RPN nuclear power peak value high limit unit output.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 5 is a schematic diagram of an apparatus for optimizing the output of the nuclear power fluctuation limiting unit according to the embodiment of the present invention, and for convenience of description, only the parts related to the embodiment of the present invention are shown.
The optimization device for limiting the output of the unit by the nuclear power fluctuation comprises:
a data collection unit 51 for collecting basic data of the nuclear instrumentation system outside the reactor;
a first data processing unit 52, configured to confirm the nuclear instrumentation system parameter according to the basic data;
the second data processing unit 53 is used for determining the acceptance criterion of the nuclear power indication calibration test RPN8 of the out-of-stack nuclear measurement system according to the parameter analysis of the nuclear instrument system;
and the execution unit 54 is used for starting the nuclear instrument system parameter adjustment according to the acceptance criterion.
It will be apparent to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely illustrated, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the mobile terminal is divided into different functional units or modules to perform all or part of the above described functions. Each functional module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional modules are only used for distinguishing one functional module from another, and are not used for limiting the protection scope of the application. The specific working process of the module in the mobile terminal may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Fig. 6 is a schematic diagram of a nuclear instrumentation system according to an embodiment of the present invention. As shown in fig. 6, the nuclear instrumentation system 6 of this embodiment includes: a processor 60, a memory 61 and a computer program 62, such as a nuclear instrumentation system program, stored in said memory 61 and operable on said processor 60. The processor 60, when executing the computer program 62, implements the steps in the above-described embodiments of the optimization method for limiting the plant output by the nuclear power fluctuation, such as the steps 101 to 104 shown in fig. 1. Alternatively, the processor 60, when executing the computer program 62, implements the functions of the modules/units in the above-mentioned device embodiments, such as the functions of the modules 51 to 54 shown in fig. 5.
Illustratively, the computer program 62 may be partitioned into one or more modules/units that are stored in the memory 61 and executed by the processor 60 to implement the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program 62 in the nuclear instrumentation system 6. For example, the computer program 62 may be divided into a data acquisition unit, a first data processing unit, a second data processing unit, an execution unit.
The nuclear instrumentation system may include, but is not limited to, a processor 60, a memory 61. Those skilled in the art will appreciate that fig. 6 is merely an example of a core instrumentation system 6 and does not constitute a limitation of the core instrumentation system 6 and may include more or less components than illustrated, or combine certain components, or different components, e.g., the core instrumentation system may also include input output devices, network access devices, buses, etc.
The Processor 60 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 61 may be an internal storage unit of the core instrumentation system 6, such as a hard disk or a memory of the core instrumentation system 6. The memory 61 may also be an external storage device of the core instrumentation system 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are provided on the core instrumentation system 6. Further, the memory 61 may also include both an internal storage unit and an external storage device of the nuclear instrumentation system 6. The memory 61 is used for storing the computer programs and other programs and data required by the nuclear instrumentation system. The memory 61 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (12)
1. A method for optimizing output of a nuclear power fluctuation limiting unit is characterized by comprising the following steps:
collecting basic data of an out-of-pile nuclear instrument system;
determining nuclear instrument system parameters according to the basic data;
determining an acceptance criterion of an out-of-stack nuclear power indication calibration test RPN8 according to the parameter analysis of the nuclear instrument system;
starting nuclear instrument system parameter adjustment according to the acceptance criterion; after the acceptance criterion is applied to the RPN8 with increased frequency, the adjustment of the nuclear instrument system parameters comprises confirmation and adjustment times of average newly added nuclear instrument system parameters in each cycle and reduction adjustment of the down-regulation frequency indicated by the nuclear power.
2. The method of claim 1, wherein collecting the off-core nuclear instrumentation system baseline data comprises:
acquiring an average neutron flux current signal of each channel of a power range of the out-of-pile nuclear instrument system;
and collecting the thermal power of the reactor core.
3. The method of claim 2, wherein the determining the nuclear instrumentation system parameters based on the baseline data comprises:
calculating an upper power and a lower power according to the average neutron flux current signal;
calculating the nuclear power and the out-of-stack axial power deviation according to the upper power and the lower power;
and if the deviation of the nuclear power and the thermal power meets a first preset condition and the deviation of the out-of-stack axial power meets a second preset condition, determining that the nuclear instrument system parameters are feasible.
4. The method of claim 3, wherein determining acceptance criteria for an out-of-core nuclear measurement system nuclear power indication calibration test RPN8 based on the nuclear instrumentation system parameter analysis comprises:
calculating new nuclear power inversely according to the determined nuclear instrument system parameters to obtain a deviation value of the nuclear power and the thermal power;
acquiring the proportion of the output of the limiting unit according to the deviation value;
and determining the value range of the acceptance criterion of the RPN8 test according to the ratio.
5. The method of optimizing nuclear power fluctuation-limited unit capacity of claim 4, wherein said determining acceptance criteria for an out-of-core nuclear measurement system nuclear power indication calibration test RPN8 based on said nuclear instrumentation system parameter analysis further comprises:
analyzing the times of confirming and adjusting the parameters of the nuclear instrument system according to the value range of the acceptance criterion;
and confirming the acceptance criterion value according to the times.
6. The method of optimizing nuclear power fluctuation-limited unit capacity of claim 1, further comprising:
collecting a nuclear instrument system control rod lifting locking signal C2;
sending the control rod lifting locking signal C2 to a nuclear power rod control position system RGL;
adding a fixed time delay to a locking control rod lifting loop of the RGL system; setting a nuclear power alarm threshold value on the RPN system, and controlling a bar lifting forbidding signal according to the RPN nuclear power peak value corresponding to the nuclear power alarm threshold value, so that the peak value in the power fluctuation duration time and the delay time does not trigger alarm.
7. The method of optimizing nuclear power fluctuation-limiting unit output according to claim 6, wherein the collecting the nuclear instrumentation system control rod lift shutdown signal C2 comprises:
collecting control rod lifting locking signals C2 of four cabinet channels of a nuclear instrument system RPN;
and performing logical operation on the control rod lifting locking signals C2 of the four cabinet channels to output one locking control signal or two locking control signals.
8. The method of optimizing nuclear power fluctuation-limiting unit capacity of claim 6, wherein after the step of acquiring the nuclear instrumentation system control rod lift lock-out signal C2, the method further comprises:
sending the control rod lifting locking signal C2 to a master control room alarm unit;
and adding fixed time delay to an alarm loop of the alarm unit.
9. The method of optimizing nuclear power fluctuation-limited unit capacity of claim 8, further comprising, after the step of sending the control rod lift lock signal C2 to a master control room alarm unit:
and increasing the triggering condition of the control rod lifting locking signal C2 alarm in an alarm loop of an alarm unit.
10. An optimization device for limiting unit output by nuclear power fluctuation is characterized by comprising:
the data acquisition unit is used for acquiring basic data of the out-of-pile nuclear instrument system;
the first data processing unit is used for confirming the nuclear instrument system parameters according to the basic data;
the second data processing unit is used for analyzing and determining the acceptance criterion of the nuclear power indication calibration test RPN8 of the out-of-stack nuclear measurement system according to the parameters of the nuclear instrument system;
the execution unit is used for starting the parameter adjustment of the nuclear instrument system according to the acceptance criterion; after the acceptance criterion is applied to the RPN8 with increased frequency, the adjustment of the nuclear instrument system parameters comprises confirmation and adjustment times of average newly added nuclear instrument system parameters in each cycle and reduction adjustment of the down-regulation frequency indicated by the nuclear power.
11. An off-heap nuclear instrumentation system comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the steps of the method according to any one of claims 1 to 9 are implemented when the computer program is executed by the processor.
12. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 9.
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