The U.S. Nuclear Regulatory Commission has approved the use of Mitsubishi Electric Total Advanced Control (MELTAC) Nplus S digital safety system controllers in U.S. nuclear power plants. While new to the U.S. industry, Mitsubishi said the MELTAC system is already deployed in 38 nuclear power plants around the world, primarily in Japan and China.
MELTAC is a control and monitoring system developed from the ground up specifically for nuclear applications. It was built around a common controller for both safety- and non-safety-related plant control functions. Mitsubishi claims the system has operated for more than 30 million hours with no plant trips due to software or hardware failures. The MELTAC-N has been utilized in non-safety applications since 2001 and for safety critical control applications since 2009.
