Measures directed to reduce the consequences of a runaway to an acceptable level. The chemical reaction of a substance in which the reaction front advances into the unreacted substance at less than sonic velocity. Where a blast wave is produced that has the potential to cause damage, the term...
Reasoning from the general to the specific. By postulating that a system/process has failed in a certain way, an attempt is made to determine what modes of system/component/operator/organization behavior contributed to the failure.
Temperature at which spontaneous decomposition occurs. In practice it is impossible to indicate the exact value of this temperature, because according to the Arrhenius law the reaction rate will only be zero at absolute zero temperature (0 K). Therefore, in measuring the decomposition temperature...
The maximum amount of energy which can be released upon decomposition. The product of decomposition energy and total mass is an important parameter for determining the effects of a sudden energy release, for example, in an explosion. The decomposition energy can occasionally be obtained from the...
Breakdown of a material or substance (by heat, chemical reaction, electrolysis, decay, or other processes) into parts or element or simpler compounds. Importance: Decomposition products often present different hazards than the original material.
Completely de-inventorying all materials from a process unit and permanently removing the unit from service. Decommissioning normally involves permanently disconnecting the unit from other processes and utilities, and is often followed by removal of the process piping, equipment, and support...
A logic tree used in reliability-centered maintenance (RCM) to help determine the correct type of maintenance (e.g., predictive, preventive) to perform to reduce the likelihood of equipment failures.
A blockage on the discharge side of an operating pump which results in the flow reducing to zero and an increase in the discharge pressure. The energy input from the deadheaded pump increases the temperature and pressure of the fluid in the pump.
