Fire simulation in the control room of Bushehr nuclear power plant by CFAST software

The main control room is one of the parts of a Nuclear Power Plant that is often identified as a part of the high fire risk in fire risk assessments. Due to the importance of fire in the main control room of Bushehr NPP-Unit 1 (BNPP-1), in this study, by using the CFAST code which is one of the deterministic safety analysis code, the fire in the main board of BNPP-1 is simulated and the results are evaluated. Required data has been extracted from safety analysis reports, and operating documents of BNPP-1 and NUREG6850 report to simulate fire. The highest recorded temperature was measured in the upper layer of the standing cabinet, about 1013C, which was result of flames and heat transfer through smoke (convection). Another highest recorded temperature was at the lower wall of the standing cabinet, measured about 700C; this temperature was due to flames of fire and also because of radiation heat transfer. The first ventilation system was blocked in 350 seconds after the start of the fire, and the second ventilation system was blocked in 860 seconds after the start of the fire.