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August 1, 2010

Safety valves and runaway reactions

I was participating in a HAZOP study of a reactor where a runaway reaction was possible.There was a serious discussion about the reaction kill system, when one of the participants asked what the operators will do if a runaway reaction occurs. The operations chief who was participating immediately answered - run away!He had witnessed an actual runaway reaction in which the reactor started rumbling, gaskets blew, safety valve lifted,and the operators ran away. Know the design basis of your safety valves. This is important for management of change and for writing operating procedures.

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