TG513 – (GE-LSTG) Mk-I Front Standard & Power Actuator

TG513 – (GE-LSTG) Mk-I Front Standard & Power Actuator


On-Site Only 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.


Upon completion of this course the participants will be able to:
  1. Provide a fundamental description of the steam path, including the identification of all major components.
  2. Identify those major components found in the GE Mk-I Front Standard.
  3. Describe normal operation of the GE Mk-I front standard components.
  4. Describe routine calibration and preventive maintenance procedures on the GE Mk-I front standard.
  5. Identify those major components found in a servo-controlled valve actuator.
  6. Identify those major components found in a non-servo-controlled valve actuator.
  7. Describe normal operation of the turbine main steam valves.
  8. Describe routine calibration and preventive maintenance procedures on both types of valve actuators.
  9. Demonstrate the knowledge necessary to troubleshoot problems regarding these systems.

Course 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, Lockout Valve, Master Trip Solenoid Valve, 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

Course Dates / Location / Fee

See for detail on the course dates / locations / and registration fees. HPC’s 3-4-2 policy applies:  Sign up 3 for the same course/date, pay in advance, and pay for only 2 (the 3rd participant is free)! HPC Technical Services reserves the right to cancel any course/seminar within 10-working days of the scheduled date.  Fees are 100% refunded or credited to another Seminar (clients' choice) if HPC should cancel any Seminar.  HPC is not responsible for non-refundable airline tickets or other travel expenses under any circumstance.

What you will receive

  1. 1 copy of HPC Technical Services' textbook, (GE) Mk-I Front Standard & Valve Actuators, as written by Harold Parker.
  2. A "Certificate of Completion" with 14 PHD awarded.

Frequently Asked Questions

  • Will HPC Technical Services bring this course to our location for our personnel only? YES, call or email Stephen Parker, for a price quotation.
  • Will HPC Technical Services customize the presentation at our site to suit our particular needs?
  • Is HPC Technical Services' textbook available for purchase as a reference document? No, this course of study is too dependent upon print reading.
  • What is the cost for HPC Technical Service to deliver this course at our location? Well, of course that can vary, but generally speaking, if you're planning on having 6+ attend, when considering your T&L, it is to your advantage to perform the course at your plant (office).  You gain from the customization and price.
  • Can HPC Technical Services perform a functional checkout and calibration of your control system during the upcoming outage OR provide troubleshooting support should it be required? Yes we can.  Call or contact Stephen Parker, for our rate sheets and any further information required.

Steam Turbine I&C Maintenance Certification

Those who attend this course are automatically qualified to take HPC Technical Services' Certification Examination.  This examination is offered at no additional expense to the participant.  An 80% passing grade is required.  The examination length will not exceed 2-hours.  Those who complete this examination will receive a revised "certificate of completion" that recognizes this accomplishment along with two-copies of a "To Whom It May Concern" letter that states their accomplishment.  (Two copies are provided, one for the participants' employer and one for the participants' personal file.)  Consult HPC's website,, for detail on this certification program

Satisfied Clients(Traditional Mk-I Controls Course)

Alliant Energy - Duane Arnold Energy Center (BWR), Central Illinois Light Company - Edwards and Duck Creek Stations, Commonwealth Edison - Dresden, LaSalle & Quad Cities Nuclear Plants (all BWR), Duke Energy - Oconee Nuclear Plant (PWR), First Energy – Bruce Mansfield, GPU/Nuclear - Hope Creek (BWR), New England Power - Salem Harbor, MidAmerican Energy – Neal, New York Power Authority - Fitzpatrick Nuclear Plant (BWR), Niagara Mohawk Power - 9 Mile Point #2 (BWR), Northern California Power Agency (manufactured by Ansaldo, similar to Mk-I), PacifiCorp - Huntington Canyon, PECO Energy - Limerick Nuclear Station (BWR), Pennsylvania Power & Light - Susquehanna NES (BWR), Southern Nuclear Company - Plant Hatch (BWR)