See also Barrier. Barrier which reduces the consequences of the release of a hazard by limiting the chain of events arising from the Top Event.

Other Related Terms and Definitions:

IADC HSE Case Guidelines Issue 02 – (Control) – Means of intervention permitted by the design (e.g. pressure relief valves, emergency power supplies), hardware (e.g. dump tanks, coolant sprays), or the presence of manually or automatically initiated ESD procedures which are intended to contain a developing situation so that escalation to a major accident may be avoided.

Source: International Association of Drilling Contractors, Appendix 2 to Health, Safety and Environment Case Guidelines for Offshore Drilling Contractors, Issue 3.3.2, February 2010. IADC Guidelines

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