The Safety and Process Computers in Phenix Nuclear Power Plant

This paper describes the use of computers in the PHENIX fast breeder power plant and the philosophy which induced: 1) The design of two safety computers specially for fuel element plugging detection in order to initiate reactor scram. The organization of calculations, the redundancy of sensors and computers are detailed. 2) The design of two computers for plant data processing, to develop adequate computer operation procedures and man-machine communications, to classify the data processes. Application of CRT for alarm and plant data displays appears to be of great help for man-machine dialogue.