CN105023109A - Reliability evaluation method and system of nuclear power station system or equipment - Google Patents
Reliability evaluation method and system of nuclear power station system or equipment Download PDFInfo
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- CN105023109A CN105023109A CN201510460133.1A CN201510460133A CN105023109A CN 105023109 A CN105023109 A CN 105023109A CN 201510460133 A CN201510460133 A CN 201510460133A CN 105023109 A CN105023109 A CN 105023109A
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Abstract
The invention provides a reliability evaluation method and system of a nuclear power station system or equipment. The method comprises the following steps: screening the system or equipment to which nuclear power station service life management pays attention, and determining an inventory of key components which form the system or equipment; collecting the reliability data of the system or equipment and the components; independently carrying out reliability evaluation on the component and the system or equipment, and outputting the reliability parameters of the components and the system or equipment. The reliability evaluation method and system of the nuclear power station system or equipment is implemented to effectively and simply output the reliability parameters of the system and the components so as to lay a foundation for the nuclear power station service life management and asset management and guarantees the safe, reliable and economic operation of the nuclear power station.
Description
Technical field
The present invention relates to nuclear power station operative technique field, more particularly, relate to a kind of nuclear power plant system or equipment dependability appraisal procedure and system, be applicable to the equipment at fortune nuclear power plant whole-life cycle fee.
Background technology
1998, U.S. EPRI (Electric Power Research Institute) has issued longevity period management (LifeCycle Management, LCM) directive/guide is implemented, be intended to provide technical support, for nuclear power station longevity period management develops new Method and Technology for nuclear power station license upgrades application.LCM is the optimization by running phase in longevity relevant Decision process to the important SSCs of nuclear power station (system, structures and parts), to improve the availability of SSCs, reaches the maximization of value and long-term gain in the phase in nuclear power station longevity.This project combines aging management and economy plan two aspects, is intended to for the great SSCs replacing/modification scheme of nuclear power station, long range cash planning and nuclear power station scheme of lengthening the life provides decision support and decision-making foundation.
Its by following activity by the operation of nuclear power station, maintenance, engineering, manage, to lengthen the life and Economic planning to permeate an overall process:
1) material situation (such as SSCs's is aging and out-of-date) in power station is managed;
2) the optimizing operation life-span (comprise and select shift to an earlier date retired and lengthen the life);
3) while guarantee safety, power station value maximization is made.
And it is in operation/retired/lengthen the life in decision-making, and upgrades in application at license, occupies very important effect.
At present, domestic early stage operation nuclear power station as the power station such as Daya Bay nuclear power plant, Qinshan first phase run the time limit all close to or reach 25 years.The all material that nuclear power station uses more or less has experienced or has experiencing ageing deterioration, this degeneration may cause the functional deterioration of power station SSCs, the reliability provided during design and margin of safety can decrease, the expense then corresponding rising running and keep in repair, also can correspondingly increase the risk of public health and safety, this just needs to carry out aging and longevity period management to nuclear power station.
And reliability assessment is aging as longevity period management and the important step of life appraisal, the reliability assessment how effectively carrying out nuclear power plant system or equipment is quickly nuclear power station longevity period management problem demanding prompt solution, is related to safe, the reliable and economical operation of nuclear power plant system and equipment.
Summary of the invention
The technical problem to be solved in the present invention is, for the actual needs of LCM in prior art and the actual conditions of power plant, and solves the importance of reliability of nuclear power station, provides a kind of nuclear power plant system or equipment dependability appraisal procedure and system.
The technical scheme that the present invention solves the problem there is provided a kind of nuclear power plant system or equipment dependability appraisal procedure, and the method comprises the following steps:
Filter out the system or equipment that nuclear power station longevity period management is paid close attention to, and determine the inventory of the critical component forming this system or equipment;
Collect the reliability data of described parts and described system or equipment;
Respectively reliability assessment is carried out to described parts and described system or equipment, export the dependability parameter of described parts and described system or equipment.
In above-mentioned nuclear power plant system or equipment dependability appraisal procedure, reliability assessment is carried out to described parts and comprises the following steps:
Fitting of distribution is carried out to the described reliability data of described parts, the parameter value of the distribution pattern that the reliability data obtaining described parts is obeyed and distribution function;
According to the parameter value of described distribution pattern and distribution function, parameter evaluation method is adopted to determine the dependability parameter of described parts.
In above-mentioned nuclear power plant system or equipment dependability appraisal procedure, reliability assessment is carried out to described system or equipment and comprises the following steps:
Set up the reliability block diagram of described system or equipment;
Set up the fault tree of described system or equipment;
According to described reliability block diagram and the described fault tree of described system or equipment, calculate the dependability parameter of described system or equipment.
In above-mentioned nuclear power plant system or equipment dependability appraisal procedure, described method also comprises:
After the reliability data collecting described parts and described system or equipment, described reliability data is arranged, carry out reliability assessment to facilitate.
In above-mentioned nuclear power plant system or equipment dependability appraisal procedure, when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then non-parametric estmation is used to determine the reliability variation tendency of described parts.
Present invention also offers a kind of nuclear power plant system or equipment dependability evaluating system, comprise load module, acquisition module, the first assessment unit, the second assessment unit and output module, wherein:
Described load module, filters out the system or equipment that nuclear power station longevity period management is paid close attention to, and determines the inventory of the critical component forming this system or equipment;
Described acquisition module, for collecting the reliability data of described parts and described system or equipment;
Described first assessment unit, for carrying out reliability assessment to described parts;
Described second assessment unit, for carrying out reliability assessment to described system or equipment;
Described output module, for exporting the dependability parameter of described parts and described system or equipment.
In above-mentioned nuclear power plant system or equipment dependability evaluating system, described first assessment unit comprises fitting module and parameter evaluation module, wherein:
Described fitting module, for carrying out fitting of distribution to the reliability data of described parts, the parameter value of the distribution pattern that the reliability data obtaining described parts is obeyed and distribution function;
Described parameter evaluation module, for the parameter value according to described distribution pattern and distribution function, adopts parameter evaluation method to determine the dependability parameter of described parts.
In above-mentioned nuclear power plant system or equipment dependability evaluating system, described second assessment unit comprises first and sets up module, second and set up module and computing module, wherein:
Described first sets up module, for setting up the reliability block diagram of described system or equipment;
Described second sets up module, for setting up the fault tree of described system or equipment;
Described computing module, for according to the described reliability block diagram of described system or equipment and described fault tree, calculates the dependability parameter of described system or equipment.
In above-mentioned nuclear power plant system or equipment dependability evaluating system, also comprise sorting module, described sorting module is used for after the reliability data collecting described parts and described system or equipment system, arranges, carry out reliability assessment to facilitate to described reliability data.
In above-mentioned nuclear power plant system or equipment dependability evaluating system, described parameter evaluation module is when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then uses non-parametric estmation to determine the reliability variation tendency of described parts.
The beneficial effect implementing nuclear power plant system of the present invention or equipment dependability appraisal procedure and system has: according to the actual conditions of nuclear power station, first reliability assessment is carried out to the critical component of nuclear power station, again to critical component form nuclear power plant equipment and system carry out reliability assessment, can the dependability parameter of output system, equipment and parts effectively quickly, thus lay the foundation for nuclear power station longevity period management and asset management.Meanwhile, to ensure the safe, reliable of nuclear power station and economical operation significant.
Accompanying drawing explanation
Fig. 1 is the nuclear power plant system of the embodiment of the present invention or the process flow diagram of equipment dependability appraisal procedure.
Fig. 2 is the nuclear power plant system of the embodiment of the present invention or the structural representation of equipment dependability evaluating system.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, be the nuclear power plant system of the embodiment of the present invention or the process flow diagram of equipment dependability appraisal procedure.The method comprises the following steps:
S101, filter out the system or equipment that nuclear power station longevity period management pays close attention to, and determine the inventory of the critical component forming this system or equipment;
In this step, after determining system or equipment and critical component inventory, the function of determining means and system or equipment, fault mode, failure cause and fault effects is also needed.
The reliability data of S201, collection critical component and system or equipment;
In this step, collect reliability data to carry out, to guarantee the applicability of collected reliability data from aspects such as the source of data, integrality, authenticity and screenings.
Further, after the reliability data collecting parts and system or equipment, also reliability data is arranged, reliability assessment is carried out to facilitate, it is divided into inner Experience Feedback to arrange and outside Experience Feedback arranges, wherein inner Experience Feedback arranges by inner Experience Feedback data preparation is the data can directly carrying out calculating, as the code name, title, quantity, time of putting into operation, industry universal crash rate etc. of parts, final formation attention location system or components interior Experience Feedback reliability data sorting table; Outside Experience Feedback arranges and is outside Experience Feedback data preparation is the data can directly carrying out calculating, final formation system or component outer Experience Feedback reliability data sorting table.Certainly, reliability data arranges the parts only related in system or equipment or critical component inventory covering scope.
S301, respectively reliability assessment is carried out to parts and system or equipment, the dependability parameter of output block and system or equipment.
In this step, the dependability parameter of parts comprises crash rate, fiduciary level, mean first inefficacy front working time (MTTFF) and 90%/95% Q-percentile life, certainly, when nuclear power station carried out maintenance, also comprised time-between-overhaul life mean failure rate or average annual Failure count; The dependability parameter of system or equipment comprises fiduciary level and mean first lost efficacy front working time (MTTFF).
Further, the reliability assessment of parts comprises the following steps:
Fitting of distribution is carried out to the reliability data of parts, the parameter value of the distribution pattern that the reliability data obtaining parts is obeyed and distribution function;
According to the parameter value of distribution pattern and distribution function, adopt the dependability parameter of parameter evaluation method determining means respectively, as parameters such as the fiduciary levels in crash rate, Q-percentile life or Given Life situation.
Wherein, according to the actual conditions of nuclear power station, when determining crash rate, crash rate appraisal procedure is divided into following situation to carry out:
When inner Experience Feedback unit failure data are more, utilize the fiduciary level of classical reliability appraisal procedure calculating unit;
When inner Experience Feedback unit failure data are less, but when having outside general crash rate, reliability comprehensive estimation method or bayes method is utilized to carry out revising the fiduciary level of general crash rate obtaining parts;
When without general crash rate and internal component failure data are less time, utilize bayes method by outside Experience Feedback and power station Experience Feedback or adopt the classical reliability appraisal procedure under changing environment, the fiduciary level revising obtaining parts is carried out to power station data;
When without general crash rate, outside Experience Feedback and inner Experience Feedback, adopt the fiduciary level of the reliability estimation method obtaining parts of non-failure data disposal route or non-lifetime data.
Further, when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then non-parametric estmation is used to determine the reliability variation tendency of described parts.
Further, system or equipment reliability assessment, mainly for crash rate, the parameter such as fiduciary level and availability of system, comprises the following steps:
Set up the reliability block diagram of system or equipment, it is the reliability relation between the function of descriptive system or equipment and the parts of composition system or equipment, and certainly, the reliability block diagram of the system or equipment of structure only relates to critical component.Particularly, by analyzing the structure of system or equipment, the structure (serial or parallel connection) of certainty annuity or equipment, and according to the classification of system or equipment structure, set up the reliability block diagram of the critical component of system or equipment.
Set up the fault tree of system or equipment, find all reasons and the reason combination of top event generation, wherein, top event does not wish the system failure or catastrophic hazard event for causing, further, probability and other quantitative targets of top event generation is obtained when having basic data.
According to reliability block diagram and the fault tree of system or equipment, the dependability parameter of computing system or equipment, as working time before the average inefficacy of system or equipment.
As shown in Figure 2, be the nuclear power plant system of the embodiment of the present invention or the structural representation of equipment dependability evaluating system.This device comprises load module 100, acquisition module 200, first assessment unit 400, second assessment unit 500 and output module 600, wherein:
Load module 100, for filtering out the system or equipment that nuclear power station longevity period management is paid close attention to, and determine the inventory of the critical component forming this system or equipment, after determining critical component inventory and system or equipment, also need the function of determining means and system or equipment, fault mode, failure cause and fault effects.
Acquisition module 200, for collecting the reliability data of critical component and system or equipment, collecting reliability data should carry out, to guarantee the applicability of collected reliability data from aspects such as the source of data, integrality, authenticity and screenings.
Further, this system also comprises sorting module 300, for after collecting reliability data, arranges reliability data, carries out fail-safe analysis to facilitate.
First assessment unit 400, for carrying out reliability assessment to parts.
Second assessment unit 500, for carrying out reliability assessment to system or equipment.
Output module 600, for exporting the dependability parameter of parts and system or equipment.
Particularly, first assessment unit 400 comprises fitting module 401 and parameter evaluation module 402, wherein, fitting module 401 is for carrying out fitting of distribution to the reliability data of parts, the parameter value of the distribution pattern that the reliability data obtaining parts is obeyed and distribution function; Parameter evaluation module 402, for the parameter value according to distribution pattern and distribution function, adopts the dependability parameter of parameter evaluation method determining means, as parameters such as the fiduciary levels in crash rate, Q-percentile life or Given Life situation.
Wherein, according to the actual conditions of nuclear power station, when determining crash rate, parameter evaluation module is divided into following situation to carry out:
When inner Experience Feedback unit failure data are more, utilize the fiduciary level of classical reliability appraisal procedure calculating unit;
When inner Experience Feedback unit failure data are less, but when having outside general crash rate, reliability comprehensive estimation method or bayes method is utilized to carry out revising the fiduciary level of general crash rate obtaining parts;
When without general crash rate and internal component failure data are less time, utilize bayes method by outside Experience Feedback and power station Experience Feedback or adopt the classical reliability appraisal procedure under changing environment, the fiduciary level revising obtaining parts is carried out to power station data;
When without general crash rate, outside Experience Feedback and inner Experience Feedback, adopt the fiduciary level of the reliability estimation method obtaining parts of non-failure data disposal route or non-lifetime data.
Further, parameter estimation module 402 is when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then uses non-parametric estmation to determine the reliability variation tendency of described parts.
Second assessment unit 500 comprises first and sets up module 501, second and set up module 502 and computing module 503, wherein, first sets up module 501 for setting up the reliability block diagram of system or equipment, particularly, by analyzing the structure of system or equipment, the structure (serial or parallel connection) of certainty annuity or equipment, and according to the classification of system or equipment structure, set up the reliability block diagram of the critical component of system or equipment; Second sets up module 502 for setting up the fault tree of system or equipment, find all reasons and the reason combination of top event generation, wherein, top event does not wish the system failure or catastrophic hazard event for causing, further, probability and other quantitative targets of top event generation is obtained when having basic data; Computing module 503 is for according to the reliability block diagram of system or equipment and fault tree, and the dependability parameter of computing system or equipment, as working time before the average inefficacy of system or equipment.
Summary, nuclear power plant system of the present invention or equipment dependability evaluating system and method can the dependability parameters of output system or equipment and parts effectively quickly, thus lay the foundation for the LCM of nuclear power station.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1. nuclear power plant system or an equipment dependability appraisal procedure, it is characterized in that, the method comprises the following steps:
Filter out the system or equipment that nuclear power station longevity period management is paid close attention to, and determine the inventory of the critical component forming this system or equipment;
Collect the reliability data of described parts and described system or equipment;
Respectively reliability assessment is carried out to described parts and described system or equipment, export the dependability parameter of described parts and described system or equipment.
2. according to the nuclear power plant system described in claim 1 or equipment dependability appraisal procedure, it is characterized in that, reliability assessment carried out to described parts and comprises the following steps:
Fitting of distribution is carried out to the described reliability data of described parts, the parameter value of the distribution pattern that the reliability data obtaining described parts is obeyed and distribution function;
According to the parameter value of described distribution pattern and distribution function, parameter evaluation method is adopted to determine the dependability parameter of described parts.
3. according to the nuclear power plant system described in claim 1 or equipment dependability appraisal procedure, it is characterized in that, reliability assessment carried out to described system or equipment and comprises the following steps:
Set up the reliability block diagram of described system or equipment;
Set up the fault tree of described system or equipment;
According to described reliability block diagram and the described fault tree of described system or equipment, calculate the dependability parameter of described system or equipment.
4. according to the nuclear power plant system described in claim 1 or equipment dependability appraisal procedure, it is characterized in that, described method also comprises:
After the reliability data collecting described parts and described system or equipment, described reliability data is arranged, carry out reliability assessment to facilitate.
5. according to the nuclear power plant system described in claim 2 or equipment dependability appraisal procedure, it is characterized in that, when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then non-parametric estmation is used to determine the reliability variation tendency of described parts.
6. nuclear power plant system or an equipment dependability evaluating system, is characterized in that, comprises load module, acquisition module, the first assessment unit, the second assessment unit and output module, wherein:
Described load module, filters out the system or equipment that nuclear power station longevity period management is paid close attention to, and determines the inventory of the critical component forming this system or equipment;
Described acquisition module, for collecting the reliability data of described parts and described system or equipment;
Described first assessment unit, for carrying out reliability assessment to described parts;
Described second assessment unit, for carrying out reliability assessment to described system or equipment;
Described output module, for exporting the dependability parameter of described parts and described system or equipment.
7. according to the nuclear power plant system described in claim 6 or equipment dependability evaluating system, it is characterized in that, described first assessment unit comprises fitting module and parameter evaluation module, wherein:
Described fitting module, for carrying out fitting of distribution to the reliability data of described parts, the parameter value of the distribution pattern that the reliability data obtaining described parts is obeyed and distribution function;
Described parameter evaluation module, for the parameter value according to described distribution pattern and distribution function, adopts parameter evaluation method to determine the dependability parameter of described parts.
8. according to the nuclear power plant system described in claim 6 or equipment dependability evaluating system, it is characterized in that, described second assessment unit comprises first and sets up module, second and set up module and computing module, wherein:
Described first sets up module, for setting up the reliability block diagram of described system or equipment;
Described second sets up module, for setting up the fault tree of described system or equipment;
Described computing module, for according to the described reliability block diagram of described system or equipment and described fault tree, calculates the dependability parameter of described system or equipment.
9. according to the nuclear power plant system described in claim 6 or equipment dependability evaluating system, it is characterized in that, also comprise sorting module, described sorting module is used for after the reliability data collecting described parts and described system or equipment system, described reliability data is arranged, carries out reliability assessment to facilitate.
10. according to the nuclear power plant system described in claim 7 or equipment dependability evaluating system, it is characterized in that, described parameter evaluation module is when carrying out reliability assessment to parts, if described parts can not determine invalid cost type, then non-parametric estmation is used to determine the reliability variation tendency of described parts.
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| CN109389294A (en) * | 2018-09-20 | 2019-02-26 | 北京广利核系统工程有限公司 | The usability evaluation method and device of nuclear safe level DCS system |
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| CN109615095B (en) * | 2018-12-12 | 2021-04-20 | 武汉瑞莱保能源技术有限公司 | Equipment management method and device |
| CN110992204A (en) * | 2019-11-08 | 2020-04-10 | 广东核电合营有限公司 | Emergency diesel generator set reliability evaluation method and system based on big data technology |
| CN112381371A (en) * | 2020-11-03 | 2021-02-19 | 苏州热工研究院有限公司 | Reliability assessment method for nuclear power unit |
| CN112381371B (en) * | 2020-11-03 | 2024-04-09 | 苏州热工研究院有限公司 | Reliability evaluation method for nuclear power unit |
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