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How to Treat Expert Judgment? With certainty it contains uncertainty!
(Mary Kay O'Connor Process Safety Center, 2019)
To be acceptably safe one must identify the risks one is exposed to. It is uncertain whether the threat really will materialize, but determining the size and probability of the risk is also full of uncertainty. When ...
Effect of Air in the Thermal Decomposition of 50 wt.% Hydroxylamine/water
(Mary Kay O'Connor Process Safety Center, 2001)
This paper presents experimental measurements of the thermal decomposition reaction of 50 wt% hydroxylamine/water (HA) in an oxygen-free environment using an APTAC calorimeter. Overall kinetics, onset temperatures, heats ...
HAZOP: Our Primary Guide in the Land of Process Risks: How can we improve it and do more with its results?
(Mary Kay O'Connor Process Safety Center, 2015)
All risk management starts in determining what can happen. Reliable predictive analysis is key. So, we perform process hazard analysis, which should result in scenario identification and definition. Apart from material/substance ...
The Use of Aerosol Formation, Flammability, and Explosion Information for Heat Transfer Fluid Selection
(Mary Kay O'Connor Process Safety Center, 2002)
The devastating consequences of aerosol/mist explosions have been widely documented, and there are currently efforts to understand the mechanisms of the formation and explosion of such aerosols. Heat transfer fluids are ...
Can we verify and intrinsically validate risk assessment results? What progress is being made to increase QRA trustworthiness?
(Mary Kay O'Connor Process Safety Center, 2017)
The purpose of a risk assessment is to make a decision whether the risk of a given situation is acceptable, and, if not, how we can reduce it to a tolerable level. For many cases, this can be done in a semi-quantitative ...
Using Screening Test Data to Classify Reactive Chemicals Hazards
(Mary Kay O'Connor Process Safety Center, 2002)
The evaluation of reactive hazards is necessary for the safe working of the chemical process industries. An integral aspect of reactive hazard testing is the screening of chemicals to focus experimental efforts on the more ...
Prevention and Suppression of Metal Packing Fires
(Mary Kay O'Connor Process Safety Center, 2002)
Structured packing has been widely used because of large surface area that makes possible columns with high capacity and efficiency. The large surface area also contributes to fire hazards because of hydrocarbon deposits ...