Management of safety integrity in the operational phase

Keywords: Safety instrumented systems, Reliability data, IEC 61508, IEC 61511, failure rates, proof testing, Bayesian updating

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Abstract:

Safety instrumented systems are used in many industry sectors to reduce risk to humans, the environment, and material assets. It is therefore necessary that the systems are sufficiently reliable. In an early design phase, it is necessary to base decisions regarding system design from initial reliability estimates. As operational experience is gained, it is important to verify that systems continue to meet stated reliability targets and to act upon performance deviations. Unfortunately, the industry has lacked practical guidance on follow up of reliability performance as required in key standards such as IEC 61508 and IEC 61511. This paper describes a new approach, developed in close collaboration with the petroleum industry in Norway. Even if the main focus is on safety instrumented systems in the oil and gas industry, the approach is still applicable for the process sector in general. © 2010 Inside Publishing. All Rights Reserved.

Volume: 2010   Issue: 1
EUR 9.72
(Pages: 19, Words: 6480)

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