JP2009098093A - Effective maintenance monitoring device for facility - Google Patents
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Abstract
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本発明は、設備の有効メンテナンスモニタ装置に関し、特に、確率的危険評価(Probabilistic Risk Assessment、PRA)法に基づいて、プラント全体の各システムに対して、機能の安全重要度により等級づけして監査するものに関する。 The present invention relates to an effective maintenance monitoring apparatus for equipment, and in particular, audits by classifying each system in the entire plant according to the safety importance of functions based on the probabilistic risk assessment (PRA) method. About what to do.
科技の進歩と発展とともに、電力の応用も、既に生活の隅々に普及され、例えば、生活においての全ての行動等には電力が応用され、いずれかの原因により電力の供給ができなくなると、生活には極大の不便を来たし、そのため、如何に良い且つ安定な給電品質を維持することは、電力会社の一つである原子力発電所の役割である。 Along with the advancement and development of technology, the application of electricity has already spread to every corner of life, for example, if electricity is applied to all actions in life, and it becomes impossible to supply power due to any cause, It is the role of the nuclear power plant, which is one of the electric power companies, to maintain a good and stable power supply quality.
米国原子力規制委員会は、原子力発電所のシャットダウンや負荷低下が設備のメンテナンスに関係することを発見し、そのため、1991年に、10CFR 50.65原子力発電所有効メンテナンスのモニタ方針を公告して、原子力発電所対して、設備の有効メンテナンスをモニタするメカニズムを要求し、そのため、米国の原子力発電所は各プラントの必要に応じて、単一ユニットバージョンメンテナンス規制データベース管理システムを作成する。 The U.S. Nuclear Regulatory Commission discovered that shutdowns and load reductions of nuclear power plants are related to equipment maintenance, so in 1991, a 10CFR 50.65 nuclear power plant effective maintenance monitoring policy was announced, On the other hand, it requires a mechanism to monitor the effective maintenance of the equipment, so US nuclear power plants create a single unit version maintenance regulatory database management system as needed for each plant.
本発明の主な目的は、高い安全重要度システム機能状態を把握して、メンテナンス作業の有効を確保し、設備の信頼度を向上して、負荷低下やシャットダウンの確率及びエンジングループの安全を向上する。 The main object of the present invention is to grasp the high safety importance system function status, ensure the effectiveness of maintenance work, improve the reliability of equipment, improve the probability of load reduction and shutdown and the safety of engine group To do.
本発明の他の目的は、有用性(Availability)や信頼度(Reliability)のバランスを調整や制御をして、オンラインメンテナンス管制の基礎が拡大され、そして、オーバーホール工期を短縮でき、発電効率が向上される。 Another object of the present invention is to adjust and control the balance of availability and reliability, expand the basics of online maintenance control, shorten the overhaul construction period, and improve power generation efficiency. Is done.
本発明は、上記の目的を達成するため、少なくとも、システム初期スクリーンフィルターと定義を実行する範囲選別基本データモジュールと、プラント全体の安全重要度を算出して、等級づけ監査を行う安全重要度解析モジュールと、信頼度限界値を算出して、それにより、機能基準を制定し、等級づけ監査の根拠とする機能基準制定モジュールと、各システムの機能利用不可の状態や時間数を記録する有用性データモジュールと、設備故障について、各システムの機能故障を判定する信頼度データモジュールと、即時に各システムの有用性データモジュールと信頼度データモジュールの状態をモニタし、機能基準限界値に到達したかを判断する即時モニタモジュールと、即時モニタモジュールにより供給された情報に基づいて、各システム機能の機能趨勢を把握し、また、即時に、予期の有効メンテナンスに到達していない作業について、修正措置を講ずる機能評価モジュールと、機能評価モジュールにより供給された情報に基づいて、格別監査を行い、機能趨勢を持続にモニタする格別監査モジュールとから構成される、設備の有効メンテナンスモニタ装置である。 In order to achieve the above object, the present invention provides at least a system initial screen filter and a range selection basic data module for executing the definition, and a safety importance analysis for calculating a safety importance of the whole plant and performing a grading audit. The module, the reliability limit value is calculated, and thereby the function standard is established, and the function standard establishment module as the basis for the grading audit, and the utility of recording the status and the number of hours that each system function is unavailable Whether the data module and the reliability data module that determines the functional failure of each system with respect to equipment failure, and the status of the usefulness data module and reliability data module of each system were immediately monitored, and whether the function reference limit value was reached Based on the information provided by the immediate monitor module and the immediate monitor module, each system Ascertain the functional trends of performance and perform immediate audits based on the information provided by the function evaluation module and the function evaluation module that takes corrective actions for work that has not yet reached the expected effective maintenance. This is an effective maintenance monitoring device for equipment, which is composed of a special audit module that continuously monitors the functional trend.
図1〜図10は、それぞれ、本発明に係わる設備の有効メンテナンスモニタ装置の構成概念図と本発明の信頼度データモジュールの構成概念図、本発明の範囲選別データ入力インターフェース概念図、本発明の有用性データモジュール表示インターフェース概念図、本発明のシステム機能流れ概念図、本発明の非機能故障判定表示インターフェース概念図、本発明の機能故障判定表示インターフェース概念図、本発明の即時モニタモジュール表示インターフェース概念図、本発明の機能評価モジュール表示インターフェース概念図及び本発明の格別監査モジュール表示インターフェース概念図である。図のように、本発明は設備の有効メンテナンスモニタ装置であり、少なくとも、範囲選別基本データモジュール11と安全重要度解析モジュール12、機能基準制定モジュール13、有用性データモジュール14、信頼度データモジュール15、即時モニタモジュール16、機能評価モジュール17及び格別監査モジュール18から構成され、安全を保証する前提下、設備のメンテナンスコストを低減でき、そして、設備のメンテナンスが所定の有効性になるように確保でき、稼動安全が向上される。 1 to 10 are respectively a conceptual diagram of an effective maintenance monitoring device for equipment according to the present invention, a conceptual diagram of a reliability data module of the present invention, a conceptual diagram of a range selection data input interface of the present invention, and a schematic diagram of the present invention. Usability data module display interface conceptual diagram, system function flow conceptual diagram of the present invention, non-functional failure determination display interface conceptual diagram of the present invention, functional failure determination display interface conceptual diagram of the present invention, immediate monitor module display interface concept of the present invention FIG. 3 is a conceptual diagram of a function evaluation module display interface according to the present invention and a special audit module display interface conceptual diagram according to the present invention. As shown in the figure, the present invention is an effective maintenance monitoring apparatus for equipment, and includes at least a range selection basic data module 11, a safety importance analysis module 12, a function standard establishment module 13, a usability data module 14, and a reliability data module 15. , Which consists of an immediate monitor module 16, a function evaluation module 17 and a special audit module 18, can reduce the maintenance cost of the equipment under the premise of ensuring safety, and can ensure that the maintenance of the equipment has a predetermined effectiveness. , Operational safety is improved.
該範囲選別基本データモジュール11は、プラントの最後の十年ライセンス更新のシステムリストを基準として、各システムについて初期スクリーンフィルターを行い、これにより実際稼動に必要としないシステムを除外し、残りのシステムについて、一つずつ各システムが実行する機能を定義し、また、米国原子力規制委員会が公告した10CFR 50.65原子力発電所有効メンテナンス度のモニタ方針に従って、管制範囲にあるかを判定し、その中、該実際稼動に必要としないシステムは、図面や仮想及び商業運転前のテストや洗浄等のシステムが含まれる。 The range selection basic data module 11 performs an initial screen filter for each system based on the system list of the last 10-year license renewal of the plant, thereby excluding systems that are not actually required for operation, and for the remaining systems. Define the functions to be performed by each system one by one, and determine whether they are within the scope of control in accordance with the 10CFR 50.65 nuclear power plant effective maintenance monitoring policy announced by the US Nuclear Regulatory Commission. Systems that are not actually required include systems such as drawings, virtual and pre-commercial testing and cleaning.
該安全重要度解析モジュール12は、確率的危険評価(Probabilistic
Risk Assessment、PRA)法に基づいて、プラント全体の確率的危険評価モードの模擬を検査し、そして、その安全重要度を算出し、該安全重要度の解析結果から、安全顕著であるものが高い安全重要度と見なし、カスケードモニタを行い、逆に、低い安全重要度と見なし、また、低い安全重要度がスタンバイであるものについて、システム級モニタを行い、正常稼動であるものについて、プラント級モニタを行い、これにより、等級づけ監査を実行し、また、該カスケードモニタは、信頼度と有用性の機能基準を制定することが必要であり、該システム級モニタは、信頼度の機能基準を制定することが必要であり、該プラント級モニタは、個別のシステム機能の信頼度や有用性の機能基準を制定する必要がない。
The safety importance analysis module 12 performs probabilistic risk assessment (Probabilistic
Based on the Risk Assessment (PRA) method, the simulation of the probabilistic risk assessment mode of the entire plant is inspected, the safety importance is calculated, and the safety significance is high from the analysis result of the safety importance. Cascade monitoring is performed with regard to safety importance, and conversely, system-class monitoring is performed for those with low safety importance as standby, and plant-class monitoring with respect to those that are operating normally. , Thereby performing a grading audit, and the cascade monitor is required to establish a functional standard for reliability and usefulness, and the system-class monitor establishes a functional standard for reliability. The plant class monitor does not need to establish functional standards for reliability and usefulness of individual system functions.
該機能基準制定モジュール13は、信頼度限界値を算出し、それにより、機能基準を制定し等級づけ監査の元とする。また、該機能基準制定モジュール13は次のステップが含まれる。 The function standard establishment module 13 calculates a reliability limit value, thereby establishing a function standard and performing a grading audit. The function standard establishment module 13 includes the following steps.
(A)ステップにおいて、まず、各プラントは、テスト手引き書を主として、手引き書に従って周期を実行し、各システム機能の評価期間の各種類の設備の総需要回数と総稼動時間数を統計し、また、各設備は、空気圧弁(AOV)や電動弁(MOV)、パンプ(Pump)、タービン(Turbine)、チラー(Chiller)及びファン(Fan)等であり、該評価期間は一般18ヶ月である。 (A) In step (A), each plant first executes a cycle mainly according to the test manual, and stats the total number of demands and total hours of operation for each type of equipment during the evaluation period of each system function. Each equipment includes pneumatic valves (AOV), motor-operated valves (MOV), pumps, turbines, chillers, fans, etc., and the evaluation period is generally 18 months. .
(B)ステップにおいて、各種類設備の故障確率値を代入し、二項分布(Binomial Distribution)やポアソン分布(Poisson
Distribution)或いは二項分布tポアソン分布の組合により、システム機能の故障回数分布を求める。
(B) In step, substitute failure probability values for each type of equipment, binomial distribution, Poisson distribution (Poisson distribution)
Distribution) or the combination of binomial distribution t Poisson distribution, the failure frequency distribution of the system function is obtained.
該システム機能の故障回数分布が95%を超える時、該システム機能が、正常の稼動状態から外れていることを示し、プラント全体のメンテナンス作業は予期の目的を達成できない。そのため、該機能基準制定モジュール13の信頼度機能基準は、該システム機能故障回数分布の95%に設定される。 When the failure frequency distribution of the system function exceeds 95%, it indicates that the system function is out of the normal operating state, and the maintenance work of the whole plant cannot achieve the expected purpose. Therefore, the reliability function standard of the function standard establishment module 13 is set to 95% of the system function failure frequency distribution.
該有用性データモジュール14は、各システム機能利用不可の状態と時間数を記録し、また、該即時モニタモジュール16により、各等級につい、有用性モニタを行い、また、一部の不有用性データが、該信頼度データモジュール15によって自動的に生成される。 The usefulness data module 14 records the status and the number of hours that each system function is unavailable, and the immediate monitoring module 16 performs usefulness monitoring for each grade, and some unusable data. Are automatically generated by the reliability data module 15.
該信頼度データモジュール15は、機能主要因部品ユニット151や非機能故障判定ユニット152及び機能故障判定ユニット153が備えられる。該機能主要因部品ユニット151は、各システムの機能流れ図上の全ての設備を作成し、これにより、故障設備がいずれかのシステムの機能を初期判定する作業が行われ、また、該非機能故障判定ユニット152と機能故障判定ユニット153は、該故障設備のタイプが有効メンテナンス度モニタの範囲にあるかを判断することに補助する。これにより、該信頼度データモジュール15で、設備故障について各システムの機能故障を判定でき、また、該即時モニタモジュール16により、信頼度モニタを行う。 The reliability data module 15 includes a functional main factor component unit 151, a non-functional failure determination unit 152, and a functional failure determination unit 153. The function main factor component unit 151 creates all the facilities on the function flow chart of each system, whereby the failure facility performs an initial determination of the function of any system, and the non-function failure determination Unit 152 and functional failure determination unit 153 assist in determining whether the type of the failure facility is within the range of the effective maintenance level monitor. Thereby, the reliability data module 15 can determine the functional failure of each system with respect to the equipment failure, and the immediate monitoring module 16 performs reliability monitoring.
該即時モニタモジュール16は、即時に該有用性データモジュール14と信頼度データモジュール15の状態をモニタし、持続的に機能情報を収集し、また、自動的に、評価期間の各システム機能の総利用不可の時間数と総故障回数を累計することにより、追跡対照して、該機能基準制定モジュール13の有用性や信頼度限界値に達到したかを判断でき、その後、機能評価モジュール17の作業を行うかを決められる。 The immediate monitoring module 16 immediately monitors the status of the usefulness data module 14 and the reliability data module 15, collects function information continuously, and automatically sums up each system function during the evaluation period. By accumulating the number of unavailable times and the total number of failures, it is possible to judge whether or not the usefulness and reliability limit value of the function standard establishment module 13 has been reached by tracking and contrasting. Can decide.
該機能評価モジュール17は、該即時モニタモジュール16により供給された情報に基づいて、カスケードやシステム級及びプラント級システム機能の機能趨勢を把握し、また、即時に、予期の有効のメンテナンスを達成できない作業について、修正措置を講ずる。また、格別監査作業が必要である場合、該機能評価モジュール17により、自動的にデータを生成して、該格別監査モジュール18の処理を実行する。 The function evaluation module 17 grasps the functional trend of the cascade, system class, and plant class system functions based on the information supplied by the immediate monitor module 16, and cannot achieve the effective maintenance expected immediately. Take corrective action for the work. If special audit work is required, the function evaluation module 17 automatically generates data and executes the special audit module 18 processing.
該格別監査モジュール18は、該機能評価モジュール17により供給された情報に従って格別監査を行い、また、その監査期間の修正措置行動や追跡状況、機能目標モニタ計画及び目標モニタ結果を記録する。機能目標に達成すると、システムが自動的に該格別監査モジュール18から離れて、該機能評価モジュール17に戻り、持続的に機能趨勢をモニタし、確実に設備の有効メンテナンスを把握できる。 The special audit module 18 performs special audits according to the information supplied by the function evaluation module 17, and records corrective action actions and tracking status, functional target monitor plan and target monitor results during the audit period. When the function target is achieved, the system automatically leaves the special audit module 18 and returns to the function evaluation module 17 to continuously monitor the function trend and reliably grasp the effective maintenance of the equipment.
本発明によれば、構築初期において、該範囲選別基本データモジュール11と安全重要度解析モジュール12により、該確率的危険評価法で原子力発電所の安全に関連する主要因システムや重要設備を選別し、またそれを、管制範囲に基本データとしてリストして、これにより、人力や物力資源は、主要因システムや重要設備に集中され、これにより、該主要因システムや重要設備の故障によるシャットダウンや負荷低下の確率を低下できる。その後、該機能基準制定モジュール13は、管制範囲内の各システム機能のモニタレベルについて、適当な機能基準を制定し、その有用性や信頼度のモニタを評価でき、そして、設備のメンテナンスアイテムや周期の基礎を調整し、これにより、設備が過度にメンテナンスされることにより、設備の有用性が低下されることを回避でき、有用性(Availability)と信頼度(Reliability)は最適化できる。 According to the present invention, at the initial stage of construction, the range selection basic data module 11 and the safety importance analysis module 12 select main factor systems and important facilities related to safety of nuclear power plants by the probabilistic risk assessment method. It is also listed as basic data in the scope of control, so that manpower and physical resources are concentrated in the main factor system and critical equipment, thereby shutting down and loading due to failure of the main factor system and critical equipment The probability of decline can be reduced. Thereafter, the function standard establishment module 13 can establish an appropriate function standard for the monitor level of each system function within the control range, evaluate its usefulness and reliability monitor, Therefore, it is possible to avoid the deterioration of the usefulness of the equipment due to the excessive maintenance of the equipment, and the availability and reliability can be optimized.
そして、該信頼度データモジュール15の機能主要因部品ユニット151は、各流れ図上の設備番号を作成し、機能故障を初期判定する作業を行い、また、該即時モニタモジュール16は、常時に機能故障回数や利用不可の時間数を統計し、一旦機能基準限界値を超える場合、該機能評価モジュール17により、機能評価作業を行い、該格別監査モジュール18により、格別監査作業を行うかを決める。これにより、高い安全重要度システム機能状態を把握でき、メンテナンス作業の有効を確保でき、そして、設備の信頼度が向上され、負荷低下やシャットダウンの確率が低減され、エンジングループの安全が向上され、また、有用性と信頼度のバランスを調整や制御を行い、オンラインメンテナンス管制の基礎が拡大され、そのため、オーバーホール工期を短縮でき、発電効率が向上される。 Then, the function main factor component unit 151 of the reliability data module 15 creates an equipment number on each flowchart, and performs an initial determination of the function failure. The immediate monitor module 16 always performs the function failure. When the number of times and the number of unavailable times are statistically exceeded and once the function reference limit value is exceeded, the function evaluation module 17 performs the function evaluation work, and the special audit module 18 determines whether to perform the special audit work. As a result, it is possible to grasp the high safety importance system function status, ensure the effectiveness of maintenance work, improve the reliability of equipment, reduce the probability of load reduction and shutdown, improve the safety of the engine group, In addition, the balance between usefulness and reliability is adjusted and controlled, and the basis of online maintenance control is expanded. Therefore, the overhaul period can be shortened and the power generation efficiency is improved.
以上のように、本発明は設備の有効メンテナンスモニタ装置であり、有効的に従来の諸欠点を改善でき、また、設備のメンテナンス記録により、モジュールが分類して、また、即時にシステム機能の信頼度や有用性を監査でき、機能基準に到達や以上のものについて、モジュールから管理人員に通知して格別監査流れを実行し、そのため、安全を保証する前提下、設備のメンテナンスコストを低減でき、そして、設備のメンテナンスが所定の有効性に到達することを確保でき、稼動安全が向上されるため、本発明はより進歩的かつより実用的で、法に従って特許請求を出願する。 As described above, the present invention is an effective maintenance monitoring apparatus for equipment, which can effectively improve the conventional defects, and the modules are classified by the maintenance records of the equipment, and the reliability of the system function is instantly confirmed. The degree and usefulness can be audited, the function standard is reached, and the above is notified to the management personnel and the special audit flow is executed, so the maintenance cost of the equipment can be reduced under the premise of ensuring safety, And since it can be ensured that the maintenance of the facility reaches a predetermined effectiveness and the operational safety is improved, the present invention is more progressive and more practical, and claims are filed according to the law.
以上は、ただ、本発明のより良い実施例であり、本発明はそれによって制限されることが無く、本発明に係わる特許請求の範囲や明細書の内容に基づいて行った等価の変更や修正は、全てが本発明の特許請求の範囲内に含まれる。 The above are merely preferred embodiments of the present invention, and the present invention is not limited thereby. Are all within the scope of the claims of the present invention.
11 範囲選別基本データモジュール
12 安全重要度解析モジュール
13 機能基準制定モジュール
14 有用性データモジュール
15 信頼度データモジュール
151 機能主要因部品ユニット
152 非機能故障判定ユニット
153 機能故障判定ユニット
16 即時モニタモジュール
17 機能評価モジュール
18 格別監査モジュール
11 Range selection basic data module 12 Safety importance analysis module 13 Functional standard establishment module 14 Usability data module 15 Reliability data module 151 Functional main cause component unit 152 Non-functional failure determination unit 153 Functional failure determination unit 16 Immediate monitoring module 17 Function Evaluation module 18 Special audit module
Claims (9)
Risk Assessment、 PRA)法に基づいて、プラント全体の確率的危険評価モード模擬を検査することを特徴とする、請求項1に記載の設備の有効メンテナンスモニタ装置。 The safety importance analysis module is a probabilistic risk assessment (Probabilistic
The effective maintenance monitoring apparatus for facilities according to claim 1, characterized in that a stochastic risk assessment mode simulation of the entire plant is inspected based on a risk assessment (PRA) method.
Distribution)やポアソン分布(Poisson Distribution)或いは二項分布とポアソン分布の組合により、システム機能の故障回数分布を求める(B)ステップとが含有されることを特徴とする、請求項1に記載の設備の有効メンテナンスモニタ装置。 The function standard establishment module firstly, each plant executes a cycle mainly according to a test guide, and statistics the total number of demands and total hours of operation for each type of equipment during the evaluation period of each system function ( A) Substitute the probability of failure for each type of equipment and the binomial distribution (Binomial
2. The facility according to claim 1, further comprising (B) a step of obtaining a failure frequency distribution of system functions by a distribution, a Poisson distribution, or a combination of a binomial distribution and a Poisson distribution. Effective maintenance monitoring device.
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