Safety Assessment and Risk-informed Design of Networked Control Systems

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Aging and obsolescence of control systems have emerged as a more and more serious problem in multiple industries, including Nuclear Power Plants (NPP). However, both the utilities and regulatory agencies maintain healthy skepticism on any changes of existing engineering systems, if there is a slight uncertainty that the new technology might endanger public safety. Meanwhile, technology advancement in the control field has enabled the emergence of modern control systems, such as Networked Control Systems (NCS). These systems are advantageous in many aspects, such as more flexibility and less maintenance. However, reliability and safety issues have to be adequately addressed before they can be adopted to retrofit existing systems. New design of control systems are also needed to support next generation NPP and other industries.