Risk criteria, adoption

Arrester Testing and Standards Regulatory and approval agencies and insurers impose acceptance testing requirements, sometimes as part of certification standards. The user may also request testing to demonstrate specific performance needs, just as the manufacturer can help develop standards. These interrelationships have resulted in several new and updated performance test procedures. Listing of an arrester by a testing laboratoiy refers only to performance under a defined set of test conditions. The flame arrester user should develop specific application requirements based on the service involved and the safety and risk criteria adopted. 

Considine (1984) defines individual risk as the risk to a person in the vicinity of a hazard. This includes the nature of the injury to the individual, the likelihood of the injury occurring, and the time period over which the injury might occur. In this work, individual risk is the criterion adopted to establish the tolerabihty hmit. 

In this study assessments of individual road bridges exposed to accidental situations are discussed from a general point of view. Stewart (2010) recommended cost-benefit and other risk-based approaches particularly for low probability-high consequence events where public safety is a key criterion for decision making. That is why methodology of the risk optimisation based on Bayesian networks is developed here. It is noted that the terminology accepted in Eurocodes (EN 1990 2002 for the basis of structural design and EN 1991-1-7 2006 for accidental actions) and other European documents DIRECTIVE 2008 114 EC and Communication COM(2006) 786) is adopted. 

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