MILESTONES IN SCREEN-BASED PROCESS-CONTROL

The paper outlines the German and the French approach to screen-based process control in nuclear power plants, both based on stepwise collection of experience. The German approach is based on the utilisation of the conceptual elements of the PRISCA information system developed by Siemens and on operational experience with screen-based process control in a conventional power plant. In the French approach the screen-based control room for the N4 plants, designed from scratch, has undergone extensive simulator tests for validation before going into realisation. It is now used in the commissioning phase of the first N4 plants. The design of the control room for the European Pressurized Water Reactor will be based on the common experience of Siemens and Electricite' de France. Its main elements are several separate operator workstations a safety control area used as a back-up for postulated failures of the workstations, and a commonly utilisable plant overview for the operators' coordination.