Abstract
This chapter discusses the safety and reliability considerations necessary for the operation of any steam turbine. Steam turbine operation involves high steam pressures and temperatures and high shaft speeds. Failure to completely drain condensate from steam turbines can result in catastrophic failure. Provisions should be made for low flow operation where the steam velocity is not great enough to carry saturated steam up to the condenser. Because the exhaust is under vacuum, vacuum pots that permit removal of condensate from the exhaust must be spared and have effective preventive maintenance to assure their continued operation. Maintaining proper turbine steam conditions is essential to maintaining optimum turbine efficiency and reliability. During low load start-up conditions, attention must be paid to the exhaust temperature of condensing turbines. There are no specific industry guidelines for when to require a turning gear. The best advice is to require the vendor to provide references for similar operating turbines and follow up to determine if a turning gear is required based on field operating experience.
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