Taming the wild river rapids: How process safety can apply outside the process industries. Issue 1 (30th July 2019) - Kerin, Trish
Abstract: On the 25th October 2016, the Thunder River Rapids ride at Dreamworld on Australia's Gold Coast suffered a pump failure, resulting in the tragic deaths of four riders. This incident was investigated by the police and later a coronial inquest to determine how a tragedy like this could occur. As a process safety professional, it was interesting to follow the coronial inquest findings and then think about how process safety management may have helped to prevent this incident. Assuming that a process safety event can be defined as a high consequence or potential consequence low likelihood loss of control event, this incident had all the hallmarks. Therefore, it is possible to apply the IChemE Safety Centre (ISC) framework for process safety to identify where the system failed and understand how it could be averted in future. This article will explore various elements of the incident and how process safety management techniques may have helped, including that the ride had been modified to be different from all other similar rides, that the staff did not know how to stop the ride in an emergency and that all means to stop the ride required manual detection and intervention, with no alarms or shut down systems installed.