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http://dx.doi.org/10.5855/ENERGY.2018.27.2.014

Risk Assessment Technique for Gas Fuel Supply System of Combined Cycle Power Plants (II) : Based on Piping System Stress Analysis  

Yu, Jong Min (Graduate School, Department of Mechanical Engineering, Chung-Ang University)
Song, Jung Soo (Graduate School, Department of Mechanical Engineering, Chung-Ang University)
Jeong, Tae Min (Graduate School, Department of Mechanical Engineering, Chung-Ang University)
Lok, Vanno (Graduate School, Department of Mechanical Engineering, Chung-Ang University)
Yoon, Kee Bong (Department of Mechanical Engineering, Chung-Ang University)
Publication Information
Journal of Energy Engineering / v.27, no.2, 2018 , pp. 14-25 More about this Journal
Abstract
The combined cycle power plant has a cycle of operating the gas turbine with fuel, such as natural gas, and then producing steam using residual heat. The fuel gas is supplied to the gas turbine at a level of 4 to 5 MPa, $200^{\circ}C$ through a compressor and a heat exchanger. In this study, the risk assessment method considering the piping system stress was carried out for safe operation and soundness of the gas fuel supply piping system. The API 580/581 RBI code, which is well known for its risk assessment techniques, is limited to reflect the effect of piping stress on risk. Therefore, the systematic stress of the pipeline is analyzed by using the piping analysis. For the study, the piping system stress analysis was performed using design data of a gas fuel supply piping of a combined cycle power plant. The result of probability of failure evaluated by the API code is compared to the result of stress ratio by piping analysis.
Keywords
Piping stress analysis; Risk; RBI(Risk-Based Inspection); combined cycle power plant; natural gas;
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