Foxboro P0914QP-OC Module

Foxboro Module P0914QP-OC  I/A Series Best Price

Introduction

Sequence of Events Recording (SOER) senses change of state of designated field contacts and records that time. Information generated from the SOER function is used to support the engineering functions of post-trip review and transient analysis.
The current time is determined from the master timekeeper station that can be synchronized to GPS satellite signals. The master timekeeper synchronizes stations within the I/A Series system using Network Time Protocol (NTP). All control processors are thus synchronized in time, although their operation is asynchronous. The control processor hosting the SOER function synchronizes its contact input FBMs with a 1 msec resolution.

The atmospheric steam dump control system provides for automatic operation of the steam dump valves following large turbine load reductions and reactor trips. A validated pressure value is obtained using the desired Redundant Signal algorithm such as the three input median selector. The validated Pressure for each Steam Generator is compared to the setpoint for that Steam Generator’s Relief Valve controller and a signal is sent to the valve. The outputs to these signals can also be redundant to provide
an additional measure of reliability.

The Steam Bypass Valves are used for the warming and initial loading of the main turbine. During normal plant operation, these valves are closed. In the event of a turbine trip, the Steam Bypass to Condenser Controls bypass steam around the turbine to the condenser, maintaining steam pressure at a stable value as the reactor is powered down and controls the rate of change of TAVG.
CONCLUSION
Invensys Operations Management is a world leader in feedwater control system implementation using both the Foxboro I/A Series DCS and the Triconex Tricon TMR PLC for safety-related applications. Using our unique technologies, Invensys has helped to improve startup times and runtime performance while reducing unplanned unit trip outages. And while operators are more informed, less interaction is required because the control system manages normal operations and transient or abnormal incidents.
With recent enhancements, Invensys Operations Management offers the proven best feedwater control systems for Nuclear power generation.

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