Screen-based human-machine interfaces, having been standard for many years in most process industries, are now also well acknowledged in the main control room of nuclear power plants. Being a standard feature of digital I&C systems, they offer significant benefits and interesting options for control room design, but also constitute challenges for the designer. Attractive opportunities for the designer and operator are for example the minimization of equipment, compared to design of hardwired panels, the reduction of cabling and cable separation issues, the flexibility and increased possibility for customization to specific utilities and operator needs. However, this flexibility brings also new challenges to the design, for new builds as well as for plant modernization projects, such as ensuring overall situation awareness of the operator, in spite the intrinsically serial character of information presentation, and the need to integrate different, even diverse digital human-machine interfaces of the safety and non-safety I&C systems. The reference concept of AREVA NP for all projects involving control room design relies on an overall I&C architecture, based on the TELEPERM XS for safety I&C systems, and Siemens SPPA T2000. SPPA T2000’s OM690 screen-based monitoring and control system is used as the integrated main operator interface, supporting plant operation in all plant states. Additionally control boards are used to implement a separate safety panel satisfying nuclear safety qualification requirements. These components are used to tailor the design of main control room, remote shut-down stations and local control stations, in accordance with licensing requirements, utility expectations and operating staff needs.

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