OCI Nitrogen seeks to gain knowledge of (leading) indicators regarding the process safety performance of their ammonia production process. The current research determines the most dangerous process equipment by calculating their effects resulting from a loss of containment using DNV GL's Phast™ dispersion model. In this paper, flammable and toxic effects from a release from the main equipment of an ammonia plant have been calculated. Such an encompassing approach, which can be carried out for an entire plant, is innovative and has never been conducted before. By using this model, it has been demonstrated that the effects arising from an event of failure are the largest in process equipment containing pressurized synthesis gas and ‘warm’ liquid ammonia, meaning the ammonia buffer tanks, ammonia product pumps, and the ammonia separator. Most importantly, this document substantiates that it is possible to rank the most hazardous process equipment of the ammonia production process based on an adverse impact on humans using the calculated effect distance as a starting point for a chance of death of at least 95%. The results from the effect calculations can be used for risk mapping of an entire chemical plant or be employed and applied in a layer of protection analysis (LOPA) to establish risk mitigation measures.

OCI氮气寻求获取有关其氨生产过程的过程安全性能的（领先）指标的知识。当前的研究通过使用DNV GL的Phast™扩散模型计算由于密闭性损失而产生的影响来确定最危险的过程设备。在本文中，已经计算了氨厂主要设备释放出的易燃和有毒物质。可以在整个工厂中执行的这种包容性方法是创新的，以前从未进行过。通过使用该模型，已证明由故障事件引起的影响在包含加压合成气和“温暖”液氨的过程设备中最大，这意味着氨缓冲罐，氨产品泵和氨分离器。最重要的是，该文件证实，可以使用计算出的作用距离作为起点，以至少95％的死亡机会为基础，根据对人类的不利影响，对氨生产工艺中最危险的工艺设备进行排名。效果计算的结果可用于整个化工厂的风险绘图，也可用于保护分析（LOPA）层中以建立缓解风险的措施。