Maintenance and Overhaul of Steam Turbines (Conference Report of the International Association of Engineering Insurers - IMIA - WGP 42 (05) - 38th Annual Conference - Moscow 2005 [Loose Leaf Edition]

TOC 2 Executive Summary 4 1. Introduction 5 2. Steam Turbine Component Characteristics, Failure 6 Mechanisms, Arrangements and Applications A. Turbine Component Characteristics and Failure Mechanisms 6 A.1 Steam Turbine Blading 6 A.2 Discs, Rotors, Shafts, Blade Rings, Shells, and Diaphragms 7 A.3 Rotor Forgings with Center Bores, Bearings and Lubrication Systems, Steam and Oil Seals, Stop, Trip & Throttle, and Intercept Valves, Governor/Control Valves, Admission, Extraction, and Non-Return Valves (NRV), Steam Line Connections and Drains 11 A.10 Turbine Overspeed Protection and Trip Logic 11 B. Steam Turbine Arrangements and Applications 12 B.1 Type of Steam 12 B.2 Exhaust System Configuration 13 B.3 Grouping and Number of Turbine Stages 14 B.4 Turbine Arrangements 15 B.5 Single Stage Small Steam Turbines 16 B.6 Multistage Medium Size Steam Turbines 16 B.7 Single Casing Admission/Extraction Multistage Steam Turbines, Single Casing Non-Reheat Multiple Stage Steam Turbines , Single Casing Reheat Multiple Stage Combined Cycle Steam 18 Turbines B.10 Multiple Casing Multiple Stage Reheat Steam Turbines 19 3. Monitoring, Operations, Maintenance, and Training Infrastructure A. Monitoring 20 A.1 Equipment Monitoring, Water and Steam Purity Monitoring 22 A.3 Water Induction Monitoring 22 A.4 Condition Monitoring 23 B. Operations, Maintenance, and Training Infrastructure 24 B.1 Operations 24 B.2 Maintenance Management 25 B.3 Training 25 4. Steam Turbine Availability and Failure Experience 27 5. Scheduled Maintenance and Overhaul Practices 30 A. U.S. Maintenance Practices 30 B. European and Japanese Maintenance Practices , Approaches/Methodologies/Criteria for Establishing Longer 37 Time Intervals between Major Overhauls A. Management Directed Interval 37 B. Process and Criticality Driven Intervals ...