Extended data

The research team conducted a survey to investigate the cause of the ammonia leak at an ice factory in Chonburi Province on May 14, 2024. Images of the breakdown in the ice production equipment are provided in the attached file. The team analyzed the incident using the Fault Tree Analysis (FTA) method and developed Boolean algebra equations. Subsequently, a risk assessment was performed based on the criteria set by the Department of Industrial Works. The findings revealed that the use of non-standard bearings and non-heat-resistant lubricants caused the pump to fail, preventing the delivery of water needed to cool the evaporator condenser unit. Consequently, the ammonia delivery pipe ruptured, resulting in a leak该研究团队于2024年5月14日针对泰国春武里府一家制冰厂发生的氨气泄漏事故原因开展专项调研。附件中提供了该制冰生产设备故障的现场影像资料。研究团队采用故障树分析（Fault Tree Analysis, FTA）方法对该事故进行了系统性分析，并构建了布尔代数方程。随后，依据工业工作部（Department of Industrial Works）制定的评估准则开展了风险评估工作。研究结果显示，使用非标轴承与非耐热润滑油导致水泵失效，无法输送冷却蒸发器冷凝器机组所需的冷却水，最终引发氨气输送管道破裂，进而造成氨气泄漏。