Execution period 2004 - 2009
Contractor Kozloduy NPP Plc.

ANALYSIS OF THE CAPABILITIES OF DESIGN SYSTEMS TO MANAGE BEYOND DESIGN BASIS ACCIDENTS

The project is implemented within KNPP Units 5 & 6 Modernization Program Measure 26431.

The project envisages conducting analyses of the Beyond Design Basis Accidents (BDBA) list for WWER 1000 and more specifically Initiating Events, as follows: Total Black Out and Total Loss of SG (Steam Generator) Normal and Emergency Feed Water. All normal operation and safety systems were analyzed and new solutions were proposed for reduction of conditional failures. New solutions were made for using the normal operation system in Beyond Design Basis Accidents. In the final report special proposals were made for the modernization of a number of normal operation systems, as well as safety systems.

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