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Course Category
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Course Schedule
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TG514 - (GE-Mk-II) Front Standard & Valve Actuators
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2 days - 1.3 Continuing Education Units Awarded
This course was prepared at a request of one of good clients. They explained that they had upgraded their control systems a few years ago, but still have the old design front standard and valve power actuators. They further explained that their I&C personnel had a need to further their knowledge on the O&M of these systems and wanted to know if HPC could help. Our response was that if there is “one” asking for such a course, there is probably a few dozen who have a need. This two day course is the result. In this course we emphasize the mechanical-hydraulic operation of the controls and, conceptually, how this system must interact with the upgraded turbine control system. In developing this course we are making a basic assumption that the upgraded control system is not GE supplied.
Topical Outline includes: Review of turbine steam path, Front Standard component O&M, Steam Valve operation, Valve Actuator component O&M, Troubleshooting.
Recommended for Engineers and E&I Technicians.
OBJECTIVES
Upon completion of this course the participants will be able to:
- Provide a fundamental description of the steam path, including the identification of all major components.
- Identify those major components found in the GE Mk-II Front Standard.
- Describe normal operation of the GE Mk-II front standard components.
- Describe routine calibration and preventive maintenance procedures on the GE Mk-II front standard.
- Identify those major components found in a servo-controlled valve actuator.
- Identify those major components found in a non-servo-controlled valve actuator.
- Describe normal operation of the turbine main steam valves.
- Describe routine calibration and preventive maintenance procedures on both types of valve actuators.
- Demonstrate the knowledge necessary to troubleshoot problems regarding these systems.
OUTLINE
- Day One
- Steam Path Overview: Main Stop Valves, Control Valves, HP Turbine Shell, Nozzle, Rotor, Intermediate (Reheat) Stop Valve, Intercept Valve, IP Turbine, LP Turbine.
- Front Standard Components: Control Rotor, Mechanical Overspeed Trip, Mechanical Trip Valve, Mechanical Trip Pilot Valve, Mechanical Lockout Solenoid Valve, Electrical Trip Valve, Electrical Trip Lockout Solenoid, Extraction Relay Valve.
- Front Standard Operation: Resetting, Overspeed Trip, Mechanical Trip, Testing.
- Conceptual Control Interface
- Malfunction & Troubleshooting
- Day Two
- Steam Valve Operations: MSV, CV, ISV, IV
- Servo Operated Actuator: ETS, Disk Dump Valve, Shutoff Valve, Fast Acting Solenoid Valve, Servo Valve
- Non-Servo Operated Actuator: ETS, Disk Dump Valve, Shutoff Valve, Fast Acting Solenoid Valve, Test Valve
- Operational Sequence
- Valve Testing Sequence
- Malfunctions and Troubleshooting
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