Derived Scada Functions for Hybrid Control Centers of Nuclear Power Plants – an Aplication for Cernavoda NPP (original) (raw)

Cernavoda NPP is a CANDU 600 power reactor, PHWR type, exported by AECL Canadian designer in ROMANIA. CANDU 600 has plant computers used for direct reactor and main nuclear systems control and also for supervisory control of BOP and HMI functions. This concept leads to hierarchical centralized connection of around 1400 analog loops and 500 digital signals from various plant systems to control computers. Due to reduced computing capabilities of the old equipments the modern data processing was not available. Starting from year 2001 a process Ethernet LAN was built in connection with plant computers allowing data acquisition of historical plant variables and any on-line processing. Also two PXI type data acquisition computers were connected in LAN to have instrumented data from the two special safety shutdown systems. Many Gigabytes of historical data are stored now in LAN servers. Recent projects are focused on the use of SCADA technologies. Romanian National Grid has recently interc...