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The Man-Machine Interface System (MMIS) on the APR1400 reactor features distributed digital architecture with a computer-based advanced control room. Software-based digital protection and control systems are employed with extensive data networks to optimize the digital technology. Thorough human factors engineering process and principles are applied and verified using the full scope dynamic mockup.

The APR1400 MMIS has the following features

  • Computerized Procedure Systems (CPS)
  • Large Display Panel (LDP)
  • Advanced alarm processing & presentation
  • Advanced control room with redundant computer workstations
  • Safety console
  • Integrated I&C architecture

Advanced Control Room

For the APR1400’s advanced control room, a unified computer based Man-Machine Interface (MMI) design has been adopted for all systems including Nuclear Steam Supply System (NSSS), Balance Of Plant (BOP) and Turbine Generator (TG). Redundant compact workstations are located in the primary control space of the main control room allowing operations to be undertaken with a minimal workload, while the workstations are placed near one another in a fixed location so that communication among operating crew members is improved.
Advanced Control Room background images

Computerized Procedure System

The Computerized Procedure System (CPS) is a computerized operator support system that enables an operating crew to execute procedures with a greatly reduced number of secondary tasks and presents an overview and instructions of a procedure, as well as related process information and controls, that need to be cross-referenced in order to execute the procedure.

Human Factor Engineering Verification & Validation

Extensive human factors engineering evaluations are performed, iteratively with the participation of licensed OPR1000 and APR1400 operators and human factors specialists. Specifically, these factors:
  • Verify that man-machine interfaces are suitable for human factors principles and guidelines; and,
  • Validate that the new control room provides adequate support for APR1400 operators while they perform normal and emergency operations.
Full scope dynamic mockups and an APR1400 specific simulator have been developed to perform human factors engineering evaluations and tests.

Integrated Instrument & Control Architecture

Information
RSR
TSC/EOF
MCR(Diverse Manual ESF Actuation (To CIM))
I&C Equipment Room
Network
  • Non - Safety I&C System (DCS)
    Pri.
    • PCS. NPCS
    • P-CCS
    • DPS
    Sec.
    • PCS. NPCS
    • P-CCS
    • DPS
  • Safety I&C System (PLC)
    PLC Network
    CPC
    PPS
    ESF-CCS(CIM)(Diverse Manual ESF Actuation (To CIM))
Control & Protection
  • Non - Safety I&C System (DCS)
    Pri.
    • PCS. NPCS
    • P-CCS
    • DPS
    Sec.
    • PCS. NPCS
    • P-CCS
    • DPS
  • Safety I&C System (PLC)
    PLC Network
    CPC
    PPS
    ESF-CCS(CIM)(Diverse Manual ESF Actuation (To CIM))
Sensor & Actuator
  • MCR : Main Control Room
  • RSR : Remote Shutdown Room
  • TSC / EOF : Technical Support Center / Emergency Operation Facility
  • DSC : Distrobuted Control System
  • PLC : Programmable Logic Controller
  • PCS : Power Control System
  • NPCS : NSSS Process Control System
  • PCCS : Process Component Control Sysem
  • DPS : Diverse Protection System
  • CPC : Core Protection Calculator
  • PPS : Plant Protection System
  • ESF - CCS : Engineered Safety Feature Component Control System
In regard to the I&C system, the design goal was to come up with a simplified, high performance, and easy to maintain facility. To this end, control systems were developed based on proven, commercial off-the-shelf I&C platforms such as a Distributed Control System (DCS) and a Programmable Logic Controller (PLC).
The DCS and PLC were differentiated in order to cope with the common mode failure of digital plant protection system. In particular, the types of Instrument and Control (I&C) platforms have been minimized to increase cost effectiveness. Furthermore, by minimizing the control system platforms, there are fewer number of gateways, fewer delays between subsystems, and fewer kinds of technology plant maintenance technicians have to learn. In short, the application of a distributed control system with a multi-loop controller for non-safety related I&C systems allows the simplification of I&C facility.