Investigation of Thermo-Hydraulic Parameters of Reactor Containment due to Cold-Leg d Brake Accident

Since the nuclear energy has been recognized as a useful energy, the subject of structure, operation and safety and environmental protection have also been important. in the nuclear reactors, one of the most dangerous accidents that can occur is the loss of coolant accident, that the most important of these events is the guillotine breaking in cold or hot leg coolant, which, This will melt the reactor core if it is not stopped. This paper presents one of the most dangerous accidents in reactor containments known as Loss of Coolant Accident (LOCA) in its worst condition which is called large LOCA.The specific type of large LOCA is DECL (Double Ended Cold Leg) break which means totally guillotine type of break in cold leg pipe. This modeling is performed in single volume method in AP1000 reactor which is one of the most sophisticated safe reactors that has ever been built. The conservation mass and energy equations have been used in this modeling and the modeling software applied in our analysis is MATLAB, and the results are compared with the AP1000 safety, security and environmental reports.