Abstract

AbstractRisk assessment and safety analysis in chemical engineering. There are in principle two possible ways of assessing the risks originating from industrial plants: the empirical method, which tries to directly evaluate experience from actual hazards and their consequences in the past, and the theoretical‐analytical method, which – in so called risk analyses – uses extensive model calculations to deduce risk values from the interrelationship between minor disturbances and major hazards and their possible consequences. It is shown that in the chemical industry reliable results can only be expected from the empirical method, since indispensable prior conditions for the application of risk analysis methods are not given in operating chemical plants. Because of the considerable degree of uncertainty, theoretically assessed values for risk should not – in the chemical industry – be used for decisions. Empirical risk assessment on the other hand is reliable and makes it clear that the risk from chemical activities is fairly low as compared to other natural and manmade risks for both employees of chemical industries and people living near industrial sites. This is, no doubt, the clear result of the consequent use of hazard and safety analysis methods during the planning and development of chemical plant.

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