NOVA: a computer-aided system to monitor proper behaviour of plant components in the Gundremmingen nuclear power plant (KRB II)

In the Gundremmingen nuclear power plant (KRB II), a computer-aided evaluation system for signal messages of the process computer has been developed to application maturity and installed. The self-acting system checks sequences of automatic operations for their proper function. Results are available only minutes after an action has happened. The high level of detail permits to detect faults before they result in system failure or loss. Since all short-time safety functions are performed automatically, these consistent and detailed checks increase the safety substantially. In addition, the NOVA-System makes it possible to search all over the signal message report for certain signals as well as to produce an overview protocol of the current (or a past) status of the Plant. (author)