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STEAM TURBINE RISK ASSESSMENT-A TOOL TO ASSIST IN OPTIMIZING INSPECTION AND OVERHAULS OF INDUSTRIAL STEAM TURBINES

机译：蒸汽轮机风险评估 - 一种有助于优化工业汽轮机检验和超出的工具

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摘要

There are currently no-or at best, very limited-industry guidelines or requirements on which to quantify the risk associated with turbine inspection intervals. Insurance industry data indicate that steam turbines are a major machinery loss item with underwriters. Thus, there are clear incentives to develop better tools within the industry to optimize the overhaul and inspection requirements for steam turbines. A steam turbine risk assessment project was initiated to develop a methodology to address the issue of optimization of overhauls by identifying and quantifying the risk associated with maintenance, operation, and engineering. Furthermore, this risk is related to the economic impact of the decision. The methodology followed is an adaptation of ASME Risk- Based Inspection Guidelines. This process, in principle, has been previously applied in the petroleum industry for pressure vessel inspection. The process consists of five steps: 1. System definition 2. Qualitative risk assessment 3. Quantitative risk analysis, which includes failure modes, effects, and criticality analysis (FMECA) 4. Inspection program identification 5. Economic optimization The result is incorporated into a computer model that will permit scenarios for individual turbines to be evaluated on a cost-riskbenefit basis. Beta testing is scheduled to begin in third quarter 1997.
机译：目前没有或以最佳，非常有限的行业指导方针或要求量化与涡轮机检测间隔相关的风险。保险业数据表明，蒸汽涡轮机是具有承销商的主要机械丢失项目。因此，有明确的激励措施可以在行业内开发更好的工具，以优化汽轮机的大修和检测要求。启动了蒸汽轮机风险评估项目，以制定一种方法来解决通过识别和量化与维护，运营和工程相关的风险来解决溢出优化问题的方法。此外，这种风险与决定的经济影响有关。该方法遵循是对基于风险的审查指南的适应。原则上，这一过程先前已经应用于石油工业的压力容器检查。该过程由五个步骤组成：1。系统定义2.定性风险评估3.定量风险分析，包括失败模式，效果和关键性分析（FMECA）4.检查计划识别5.经济优化将结果纳入A.计算机模型将允许在成本风险的基础上评估各个涡轮机的情况。 Beta测试计划于1997年第三季度开始。

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