Patent ID: 6965834
Filing Date: 2005-11-15
Classification: F01D,F05D,G01N

Abstract:
1. A method of inspecting a target component part of an apparatus included in a steam turbine system, the target component part being exposed to steam that flows through a space defined by an enclosing member of the apparatus when the steam turbine system is in normal operation, said method comprising the steps of: shutting down the steam turbine system which has been in normal operation; obtaining, after shutting down the turbine system, a first data by means of an inspecting device, the first data relating to a dimension of a crack formed in the target component part or relating to a clearance between the target component part and an adjacent component part arranged adjacent to the target component part, wherein the obtaining step is performed when a time period in a range of 24 to 100 hours passes from the shutting-down of the turbine system, or before an atmospheric temperature of the space is lowered to 100° C., and wherein the obtaining step is performed without disassembling the enclosing member and the target component part from the apparatus having the target component part; and judging whether the target component part should be repaired upon comparing the first data with a judgmental standard, or comparing an output calculated by applying the first data to a predetermined function with a judgmental standard.