Challenges for instrumentation, controls, and human-machine interface technologies

Various challenges faced by the nuclear power plants while engaged in a transition from traditional analog-based instrumentation, controls, and human-machine interface (ICHMI) systems to fully digital systems are discussed. The transition has occurred in an ad hoc fashion through individual system upgrades at existing plants and has been constrained by licensing concerns. A technology research, development, and demonstration (RD&D) road map is under development by ICHMI technology which focuses on the ICHMI issues associated with the Next Generation Nuclear Plant (NGNP) and Gen IV programs. Advanced ICHMI systems enable precise monitoring of plant performance, thus providing better data to plant control systems. The system also monitors the plant processes and various barriers that prevent the release of radioactive material to the public. The application of advanced ICHMI diagnostic and prognostic technology would provide significant enhancements in capital investment.