Device and procedure to detect unauthorized manipulations of the system status of a control and regulation unit of a nuclear installation

摘要

Device (70) for detecting unauthorized manipulations of the system status of a control and regulation unit (9), where - a monitoring module (82) is provided, which monitors the operational status and / or the expansion status of the hardware and / or the status of the program of the control and regulation unit (8) and, in the event of changes in this status, it generates a message, - a control module (116) is provided, which monitors the operation of the monitoring module (82), and - the monitoring module (82) monitors the operation of the control module (116), characterized in that the control and regulation unit (8) has a memory-programmable control (10) and the The monitoring module (82) and the control module (116) are software elements of the memory-programmable control (10), which mutually check whether the respective other module processes program indications as expected within a given time interval. efixed.