Low-Pressure Steam Turbine Blade Failures. Workshop Proceedings, Detroit, Michigan, June 28-29, 1978

摘要

Failures of blades in the low-pressure sections of steam turbines is costing the utility industry at least 265 million dollars/y. 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. Utility concerns involving circumstances of blade failures, corrective actions, inspection, reliability, blade replacement, and independent research were discussed. Current EPRI-sponsored R and D projects related to steam turbines were also described. 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. 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 individual presentations, the ensuing discussions, and the recommendations of the three working groups are summarized. (ERA citation 05:030599)