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On the need for system-theoretic hazard analysis in the process industries
Journal of Loss Prevention in the Process Industries ( IF 3.5 ) Pub Date : 2020-11-24 , DOI: 10.1016/j.jlp.2020.104356
Paul Baybutt

Most process hazard analysis (PHA) studies today are conducted using traditional methods such as the hazard and operability study (HAZOP). Traditional methods are based on a chain-of-events model of accident causality. Current models of accident causality are based on systems theory and provide a more complete representation of the causal factors involved in accidents. Consequently, it is logical to expect that PHA methods should reflect these models, that is, system-theoretic hazard analysis (STHA) should be used. Indeed, system-theoretic process analysis (STPA) has been developed as such a method. STPA has been used in a variety of industries but, at this time, it has not gained acceptance by the process industries. This article explores the reasons for this situation. Expectations for PHA in the process industries are examined and issues for the application of STPA in the process industries are discussed. It is concluded that a variety of matters must be addressed before STPA can be considered as a viable PHA method for the process industries and the case for the use of STHA in the process industries is not yet proven.



中文翻译:

关于过程工业中系统理论风险分析的需求

如今,大多数过程危害分析(PHA)研究都是使用传统方法进行的,例如危害和可操作性研究(HAZOP)。传统方法基于事故因果关系的事件链模型。当前的事故因果关系模型基于系统理论,并提供了事故中因果关系的更完整表示。因此,合乎逻辑的期望是PHA方法应反映这些模型,即应使用系统理论风险分析(STHA)。实际上,已经开发了系统理论过程分析(STPA)作为这种方法。STPA已在多种行业中使用,但目前尚未得到加工行业的认可。本文探讨了这种情况的原因。研究了过程工业对PHA的期望,并讨论了STPA在过程工业中的应用问题。结论是,在将STPA视为过程工业中可行的PHA方法之前,必须解决各种问题,并且尚未证明在过程工业中使用STHA的情况。

更新日期:2020-11-25
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