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Enforced Operability

Highly reliable Instrumentation and control(I&C) systems with extended capabilities and operability are indispensable for the safe and stable operation of a nuclear power plant. The operability of Mitsubishi PWR plants has been improved through utilization of the latest computer and electronics technologies and development of easily maneuverable main control boards and digitalized reactor control/protection systems. For existing plants, MHI has performed complete replacement of the main control boards to enhance operability, as well as a renewal of the instrumentation/control systems and cables in plant.

Advanced Instrumentation and Control System

Soft-operation Main Control Boards

  • Improved Operability
  • reduced walking through length
  • reduced number of potential monitoring mistakes
  • reduction in the number of operators

Comprehensive Digital Control and Monitoring System

  • Improved Operability and Control Flexibility
  • increased degree of automatic operation
  • load follow operation
  • operational multiplicity, such as AFC/GF*operation
  • Enhanced Reliability and Safety
  • minimized number of erroneous operation and trips
  • Improved Maintainability & Testability
  • reduced duration of maintenance and test activities through the use of self-diagnostic functions and automatic test systems
  • Reduce Materials
  • reduce number of control boards and cable

Digital Reactor Protection System

  • Improver Operability and Control Flexibility
  • increased degree of automatic operation
  • daily load follow operation
  • operational multiplicity, such as AFC/GF*operation
  • Enhanced Reliability and Safety
  • minimized number of erroneous operation and trips
  • Improved Maintainability & Testability
  • reduced duration of maintenance and test activities through the use of self-diagnostic functions and automatic test systems
  • Reduce Materials
  • reduce number of control boards and cables

Multiplex Data Transmission and Multi-core Cables

  • Reduce Materials
  • reduce number of control boards and cables
  • AFC:Automatic frequency control, GF:Governor-free

Business contact: Nuclear Energy Systems Nuclear Energy Systems Administration Department Planning Group +81-3-6716-4812

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