Fire protection is one of the most important issues to ensure safety and reduce risks of nuclear power plants. The main control room (MCR) is one of the parts of a nuclear power plant that is often identified with a high risk of fire in safety assessments. Although robust programs to shut down commercial reactors in any fires have been successfully maintained, the purpose of this paper is to simulate the fire in the MCR of Bushehr nuclear power plant unit‑1 (BNPP-1) using CFAST software. CFAST is a two-zone fire model used to calculate the evolving distribution of smoke, fire gases, and temperature throughout the compartments of a building during a fire. The data required for simulation have been extracted from final safety analysis reports and operating documents of BNPP‑1 and NUREG6850 reports. The results showed that the highest recorded temperature was related to the upper part of the standing cabinet about 1013 °C, which is the result of flames as well as heat transfer through smoke. Also, the other highest recorded temperature was in the lower part of the standing cabinet about 700 °C. Finally, the first ventilation system was closed for about 350 s and the second ventilation system was closed for about 860 s after the fire started.

消防是确保核电站安全、降低风险的最重要问题之一。主控室（MCR）是核电站安全评估中经常被认定为火灾高风险的部分之一。尽管在任何火灾中关闭商业反应堆的强大程序已经成功维护，但本文的目的是使用 CFAST 软件模拟布什尔核电站 1 号机组 (BNPP-1) MCR 中的火灾。 CFAST 是一个两区火灾模型，用于计算火灾期间建筑物各个隔间中烟雾、火灾气体和温度的演变分布。模拟所需的数据是从最终安全分析报告以及BNPP-1和NUREG6850报告的操作文件中提取的。结果显示，最高记录温度与立柜上部有关，约为1013℃，这是火焰和烟雾传热的结果。此外，另一个最高记录温度是在立柜下部，约为 700 °C。最后，火灾发生后，第一通风系统关闭约350秒，第二通风系统关闭约860秒。