September 2024 | AIChE

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September 2024

Conditional Modifier

One of several possible probabilities included in scenario risk calculations, generally when risk criteria endpoints are expressed in impact terms (e.g., fatalities) instead of in primary loss event terms (e.g., release, vessel rupture). Conditional modifiers include, but are not limited to:...

Condensed Phase Explosion

An explosion that occurs when the material is present in the form of a liquid or solid.

Conceptual design

The initial design of a project when basic parameters are known but design details have yet to be developed.

Computerized Maintenance Management System (CMMS)

Computer software for planning, scheduling, and documenting maintenance activities. A typical CMMS includes work order generation, work instructions, parts and labor expenditure tracking, parts inventories, and equipment histories.

Computer

Equipment composed of hardware (H/W) and software (S/W) that performs basic control functions or process control optimization.

Compliance With Standards

CCPS RBPS Element 02: This Element is the system used to provide access to, including acquiring or developing, as needed, process safety technologies, codes, and standards.

Competency

A PSM program element associated with efforts to maintain, improve, and broaden knowledge and expertise.

Compatibility

The ability of materials to exist in contact without specified (usually hazardous) consequences under a defined scenario. (ASTM E 1445)

Common Mode Failure

Concurrent failures of different devices characterized by the same failure mode (i.e., identical faults).

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