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MELTAC® Platform Controller (CPU Chassis)

The MELTAC® Digital I&C Platform


The Mitsubishi Electric Total Advanced Control (MELTAC®) digital I&C platform was developed from the ground up specifically for nuclear applications, built around a common controller for both safety and non-safety related plant control functions. MELTAC® is currently installed in over 450 applications at more than 24 operating nuclear power plants, and has more than 30 million hours of operating experience with zero plant trips due to software or hardware failures.
The latest generation of the MELTAC® digital I&C platform, MELTAC-N, has been utilized in non-safety applications since 2001 and for safety critical control applications since 2009.


  • Reactor Protection System
  • Engineered Safety Features Actuation System
  • Reactor Control System
  • Control Rod Drive Mechanism Control System
  • Digital Rod Position Indication System
  • Turbine Protection System
  • Turbine Electro-Hydraulic Governor Control System
  • Nuclear Instrumentation System
  • In-Core Instrumentation System
  • Radiation Monitoring System






The MELTAC® platform is completely engineered, manufactured, and tested in-house under Mitsubishi Electric’s 10 CFR 50 Appendix B quality assurance program, and fully qualified to all applicable nuclear safety regulations and standards, including:
  • IEEE 7-4.3.2 Criteria for Programmable Digital Computer Systems
  • IEEE 323 Qualifying Class 1E Equipment
  • IEEE 344 Seismic Qualification of Class 1E Equipment and Circuits
  • R.G. 1.152 Criteria for Programmable Digital Computers in Safety Systems of Nuclear Power Plants
  • R.G. 1.180 Guidelines for Evaluation Electromagnetic and Radio Frequency
  • Quality Assurance Program compliant to 10 CFR 50 Appendix B (ASME NQA-1-1994)
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