基于ALOHA的有毒有害气体泄漏对主控室可居留性影响研究

Study on Impact of Leakage of Toxic and Hazardous Gases on Habitability of Main Control Room Based on ALOHA

以国内某核电项目为依托,根据美国核安全管理导则RegulatoryGuide1.78-Evaluatingthe Habitability of a Nuclear Power Plant Control Room During a Postulated Hazardous Chemical Release(RG1.78)评估原则,梳理并筛选核电厂中符合要求的化学品,利用ALOHA软件计算发生泄漏后进入主控室的有毒有害气体浓度,评估泄漏后对主控室可居留性影响。从模拟结果看,由于核电厂核岛厂房为封闭设计,主控室通风口位于核岛厂房内部,当发生有毒有害气体泄漏时,主控室通风口处的有毒气体浓度低于毒性限值,不会对主控室可居留性造成重大影响。

Based on a nuclear power plant in China and the assess principle of the Regulatory Guide 1.78-Evaluating the Habitability of a Nuclear Power Plant Control Room during a Postulated Hazardous Chemical Release, the U.S. nuclear safety guide, we collected and screened the chemicals used in this project, and use ALOHA to calculate the concentration of toxic and hazardous gases entering the main control room when a leak occurs. Finally, the impact of the leakage on the habitability of the main control room is evaluated. The simulation results show that, since the nuclear island is enclosed and the air vents of the main control room is inside of the nuclear island, when a toxic and hazardous gases leak occurs, the concentration of toxic and hazardous gases near the air vents is lower than the limits, and will not have a significant impact on the habitability of the main control room.