CCPS Process Safety Glossary

A system of remote control for preventing improper operation of the...

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An electrical system so designed that the failure of any component in the...

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The ability of a Process Control System to have its outputs assume a...

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An unacceptable difference between expected and observed performance.

The number of failure events that occur divided by the total elapsed...

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A symptom, condition, or fashion in which hardware fails. A mode might be...

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A hazard identification technique in which all known failure modes of...

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A variation of FMEA that includes a quantitative estimate of the...

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The probability - a value from 0 to 1 - that a piece of equipment will fail...

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The number of failure events that occur divided by the total elapsed...

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The degree of function degradation of equipment usually noted through...

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A concept where a specific effort is made to disprove a speculated...

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The area beyond the influence of local structures and plume buoyancy effects...

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A unit of capacitance equal to Coulombs per volt. See “Capacitance.”

Grounded metal sheet or mesh enclosure that prevents external electric...

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A valve that closes a path of deflagration propagation in a pipe or duct in...

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The estimated number of fatalities per 108 exposure hours (roughly 1000...

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Use of component selection, conservative design, testing, and burn-in to...

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That property of a system which permits it to carry out its assigned...

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A system where some parts may fail but the system will still execute...

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A logic model that graphically portrays the combinations of failures that...

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A method for representing the logical combinations of various system states...

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Estimation of the Hazardous incident (Top Event) frequency from a logical...

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The mean fraction of time in which a component or system is unable to...

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A method by which one or more controlled variables (i.e., pressure,...

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A device that manipulates a process variable normally associated with the...

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See Critical Final Control Element.

A field device used to drive the process to its lowest energy state, or a...

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A load device, such as a solenoid valve or motor starter, that is...

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A combustion reaction accompanied by the evolution of heat, light, and flame...

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The minimum temperature at which a flammable or combustible liquid, as...

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Methods of providing for fire control or fire extinguishment. (NFPA 850)...

The atmospheric burning of a fuel-air cloud in which the energy is mostly...

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Configurable digital programs, procedures, rules, and associated...

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A term usually referring to an annunciator feature that indicates which...

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A region in which chemical interaction between gases occurs, accompanied by...

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