International Journal of Mechanical Engineering

During the installation of LP2 low pressure outer cylinder of turbine of Unit 1 of a nuclear power plant, it was found that the outer cylinder elevation could not adjust the nominal size, which directly affected the subsequent installation of the turbine, resulting in the overall lag of the main line of the conventional island cylinder for several months. In this paper, the root cause of the fault phenomenon is analyzed, and the treatment scheme is demonstrated through calculation and analysis, which provides a reference for similar fault treatment of similar models. At the same time, the root causes are deeply considered to provide reference for the construction of batch units and power plants of the same type, so as to avoid the recurrence of similar failures.

Steam turbine; Mark high difference; Cylinder compensator; Installation deviation; Matching