Each group provided a forum for engineers to exchange ideas and information in a less formal environment. In addition to the technical presentations, working group sessions were held on selected topics relevant to steam turbine blade reliability improvement. The formal presentations were organized under the following general session titles: utility experience with turbine blades blade failure mechanisms and causes blade design for more » high reliability problem solutions for operating units and failure analysis, NDE, and diagnostics. These proceedings contain the text of the formal presentations as well as summaries of the working group sessions which were devoted to topics of particular interest to the workshop participants. The 142 attendees represented a broad spectrum of US utilities, equipment manufacturers, and consultants, as well as representatives from Canada, Europe, and Japan.
The individual presentations, the ensuing discussions, and the recommendations of the three working groups are = ,Īn EPRI workshop to address steam turbine blade reliability improvement was cohosted by Boston Edison Company in Boston, Massachusetts on July 7-9, 1982. These issues are reflected in the following principal recommendations of the working group sessions: regularly scheduled workshops a news bulletin and reporting system for improved information exchange about turbine failures improved inspection procedures and requirements standardization of blade design better understanding of environment-material interactions and in situ corrective actions for existing blades. The two most important themes that emerged were the desire for improved interutility communications about blade failures and the necessity for better solutions to blading problems. Current EPRI-sponsored R and D projects related to steam turbines were also described. Utility concerns involving circumstances of blade failures, corrective actions, inspection, reliability, blade replacement, and independent research were discussed.
For this reason, a workshop was held to provide a forum for the exchange of information among utilities about blade failures and to recommend research and development to ensure increased blade life. Failures of blades in the low-pressure sections of steam turbines is costing the utility industry at least 265 million dollars/y.
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