第 1 部 (7) 蒸気タービンの寿命評価とリスクベースメンテナンス

概要

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An integrated approach for risk-based maintenance was established to support optimum maintenance planning for steam turbine components. The plant life-cycle scenario is described through parts' life-cycle event trees for various damage phenomena and maintenance actions. The risk is estimated through probabilistic risk analysis calculating unreliability and expected expense for each event. Maintenance planning was determined through the net benefit obtained by operational income minus risk and maintenance cost. The unreliability is calculated as the function of operation time or cycles using field database. When the field data for detrimental phenomena was not obtained, probabilistic life assessment method could be utilized. The risk to detrimental state is predicted using life prediction rules with statistical distribution of experimental data. A personal compute (PC) based RBM system was developed consisting of the field database, event trees, statistical analyses, risk analyses and maintenance judgement.
一般社団法人日本機械学会の論文
2003-03-27