Difference between revisions of "Common Cause Failure"
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m (Mtheocharidou moved page Common cause failure to Common Cause Failure: Text replacement - "Common cause failure" to "Common Cause Failure") |
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=== European Definitions === | === European Definitions === | ||
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| + | {{definition|Common Cause Failure is a [[failure]] that is the result of one or more [[Event|events]], causing concurrent failures of two or more separate channels in a multiple channel system, leading to a failure. <ref>[http://www.ewics.org/docs/home European Workshop on Industrial Computer Systems Reliability, Safety and Security (EWICS) paper WP1512]</ref>}}<br/><br/> | ||
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=== Other International Definitions === | === Other International Definitions === | ||
Insert here definitions from international organizations, if available. Each new definition should be formatted as a heading level 4, followed by the unformatted text of the definition. An example follows below: ==== United Nations’ Definition ==== | Insert here definitions from international organizations, if available. Each new definition should be formatted as a heading level 4, followed by the unformatted text of the definition. An example follows below: ==== United Nations’ Definition ==== | ||
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{{definition|Common Cause Failure is the failure of two or more structures, systems or components due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | {{definition|Common Cause Failure is the failure of two or more structures, systems or components due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | ||
{{definition|Common mode failure is the failure of two or more structures, systems or components ''in the same manner or mode'' due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | {{definition|Common mode failure is the failure of two or more structures, systems or components ''in the same manner or mode'' due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | ||
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===Standard Definition=== | ===Standard Definition=== | ||
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== Discussion Topic == | == Discussion Topic == | ||
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[[Category:Threat]] | [[Category:Threat]] | ||
[[Category:Risk]] | [[Category:Risk]] | ||
| − | {{#set:defined by=IAEA|defined by=Australia}} | + | {{#set:defined by=IAEA|defined by=Australia|defined by=EWICS}} |
Revision as of 15:24, 3 June 2017
A common cause failure (CCF) - also refered to as Common Mode Failure - is a failure where:
- The function of multiple CI is disrupted or destroyed by the same cause or hazard affecting the CI at the same location or area in the same time frame (e.g., a hurricane blocking roads and affecting telecommunication and power lines; a collapsed bridge which blocks inland shipping, road transport and caused disruption of gas, power and telecommunication lines)
- Item failures result from a single shared cause and coupling factor (or mechanism)
Contents
Definitions
National Definitions
Australia
Common mode failure is the coincident failure of two or more independent components as the result of a single cause; of particular concern in an instrument system incorporating redundancy where an event causes coincident failure of two or more of the normally independent channels. [1]
International Definitions
IAEA
Common Cause Failure is the failure of two or more structures, systems or components due to a single event or cause. [2]
Common mode failure is the failure of two or more structures, systems or components in the same manner or mode due to a single event or cause. [2]
Discussion Topic
See also
- Geographical Dependency - incorrect term often used for Common Cause Failure
