TEG-5 Nuclear Feed Pump Turbine Governors

Lovejoy Controls Corporation's TEG-5 line of Nuclear Feed Pump turbine Governors is a commercial version based upon the NavGov 900 Naval Turbine Governor under production for military application. Applications include:

    TERRY TURBINE obsolete Woodward Governors which are no longer supported by replacement spares:

            Auxiliary (or Emergency) Feedwater Pump Turbines (AFW) in Pressurized Water Reactor Plants (PWR)

            Reactor Core Isolation Coolant  (RCIC) Pump Turbines in Boiling Water Reactor Plants (BWR).

            High Pressure Coolant  Injection (HPCI) Pump Turbines in Boiling Water Reactor Plants (BWR)

            Low Pressure Coolant  Injection (LPCI) Pump Turbines in Boiling Water Reactor Plants (BWR)

    The original Woodward Governor designs above represent one of the cruelest jokes ever perpetrated on the US Nuclear industry.  Consisting of a dry-start, self contained oil pump system, these designs are required to quickly pressurize oil and purge air during cold start turbine acceleration.  Without constant diligence and frequent skilled maintenance efforts the pressure to the governor valve hydraulic actuators cannot be established in time and the turbine suffers an over speed trip.  Since these systems are normally in standby service the startup problems are a severe nuisance. 

    The electronic components added for some systems (termed "EG-M" and "EG-R") are no better.  All analog 1970's designs containing commercial electrolytic capacitors, these designs have low radiation tolerances (pre-TMI "hand waving" qualifications), tedious calibrations, and as of recently no new spare parts available.  An after-market licensee is performing refurbishing of the old components then recycling shipments between plants.  It is unknown how long this will maintain the installed systems in operable condition. 

    SOLUTION for Terry Turbine Control:    The LCC TEG-5

    The TEG-5 (and specific TEG-5A for Aux FW) provide a Safety-Related design replacement package which installs on the turbine pedestals, driving a roller screw electric actuator which positions the governor steam admission valve.  All obsolete Woodward Governor components are removed, and may be sold to remaining die-hard users for a fairly good price.  The TEG-5 operates on a low current 5 Ampere draw of 125 VDC Vital Bus power, and since located at the turbine does not require new pump room penetrations nor power feeds through existing penetrations as competitive designs demand.

Hardware Features:

    ○    Self-Contained Environmentally Controlled Electronics Enclosure holds Governor, Servo Drive, and Local Operator Panel

    ○    Two Remote Control Operator Stations (Remote Pump Control Panel and Control Room Locations)

    ○    Redundant Speed Probes

    ○    EMI/RFI Qualifications

    ○    Radiation EQ Qualifications

    ○    Severe Temperature, Humidity, Shock, and Vibration Qualifications

    ○    Electric Valve Actuator... No dependence on hydraulics.

Advanced Control Features:

    ○    Automatic Startup on Block Valve Opening

    ○    Controlled, Predictable Accelerations

    ○    Self-Monitoring Diagnostics and Alarms with Plant Computer Interface

Advanced Control Advantages:

    ○    Deletes Necessity of Water-Hammer Inducing Steam Bypass System

    ○    Removes Systems from Periodic "On-the-Clock" Repair Pressures

TEG-5A Evaluation Software Simulator, Aux FW        FREE to Qualified Users*

    The TEG-5A Evaluation Software Simulator (ESS) is a Windows-based executive program which may be loaded in any Windows Operating System PC.  The ESS demonstrates by interactive graphics the features and functions of the TEG-5A Governor System in a typical Auxiliary Feedwater Pump Turbine control application.  The ESS was originally designed as a self-paced training tool for operators to familiarize themselves with system functions, but serves equally well for plant evaluations.

    Simulations include:

    1.    Local Control Panel Pushbuttons and Indicators

    2.    Inter-active Turbine Speed Control

    3.    Alarm System

    4.    Automated Startup Ramp System

    5.    Remote Operation from two (2) Remote Operator Control Stations

*    The TEG-5A ESS is available at no charge with on-site restricted software license to personnel at operating nuclear plants.  Distribution of the program to third parties is prohibited.  Contact LCC for details.

TEG-5 Full Hardware Simulator

    A limited number of full hardware TEG-5 mockup systems are available for rental or purchase.  These systems provide a platform for plant evaluation using the actual system hardware.  In order to enable a meaningful system exercise and performance evaluation, special test hardware is included to close control loops for realistic operation.  Each hardware simulator provides:

1.    TEG-5 Turbine Governor with Servo Drive

2.    Roller Screw Electric Actuator

3.   Test Stand Bracket Holding Electric Actuator, Pneumatic Loading Cylinder, Loading I-to-P, and Stroke Transducer.

4.    Turbine Speed Feedback Simulator (TSFS) and Actuator Loading System (ALS) Interface Cabinet.

5.    Support Laptop PC with Software to Run TSFS/ALS.

    The hardware simulator permits simulated operation under a wide range of initial conditions of available steam pressure and pump header pressure.