... on condition assessment and remaining life analysis. These gas turbine components are normally repaired and refurbished after stipulated operating hours. The decision on the extent of repairs is based on various inspection stages. Among various methodologies of condition assessment, metallography followed...

... of the piping system. Nuclear utilities have implemented periodic wall thickness inspection programs and carried out replacement of pipes prior to reaching an unsafe state. To optimize the life-cycle management of PHTS, accurate prediction of time of replacement or “end of life” of pipe sections is important...

.... The methods take into account both initiation and propagation of PWSCC cracks in the expansion transition zone of steam generator tubes, as well as the current damage status (cracking and plugging) of the tube bundle, known from inspection results. A probabilistic model is used to treat initiation, while...

... and frequency of nondeterministic inspections. In this paper, an approach is presented for estimating the risk reduction associated with the nondestructive inspection of aircraft engine components subjected to fretting fatigue. Contact stress values in the blade attachment region are estimated using a fine mesh...

...X.-X. Yuan; M. D. Pandey; J. Riznic The accurate estimation of piping failure frequency is an important task to support the probabilistic risk assessment and risk-informed in-service inspection of nuclear power plants. Although probabilistic models have been reported in the literature to analyze...

..., and engine health condition decision-making process. Nondestructive inspection, remote visual inspection, spectral oil analysis, fault tolerant control techniques of hot engine parts, engine electronic control unit, airplane information-display system, engine performance trend monitoring, vibration...

... a gas turbine needs more frequent inspection and maintenance as it ages. A unit-specific sequential preventive maintenance approach is therefore needed for gas turbine power plant preventive maintenance scheduling. Traditionally, the optimization criteria for preventive maintenance scheduling is usually...

...N. Goldfine; D. Schlicker; Y. Sheiretov; A. Washabaugh; V. Zilberstein; T. Lovett The conformable Meandering Winding Magnetometer (MWM ® ) eddy current sensors and MWM-arrays provide new inspection capabilities for gas turbine components. The sensors provide measurements of coating thickness...

... received by IGTI Oct. 1999; final revision received by ASME Headquarters Oct. 2000. Associate Editor: D. Wisler. 08 May 2000 01 Oct 1999 01 Oct 2000 gas turbines piezoelectric devices inspection crack detection monitoring sensors electric impedance measurement Health...

.... 08 May 2000 01 Oct 1999 01 Oct 2000 gas turbines monitoring inspection fibre optic sensors One of the Dutch utilities faced the fact that a second stage set of turbine blades had to be replaced long before the estimated lifetime as a result of tip shroud deflection...