Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
Safety Considerations Guide for Triconex General ... - ICEWeb
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2 Chapter 1 <strong>Safety</strong> Concepts<br />
Overview<br />
Modern industrial processes tend to be technically complex, involve substantial energies, and<br />
have the potential to inflict serious harm to persons or property during a mishap.<br />
The IEC 61508 standard defines safety as “freedom from unacceptable risk.” In other words,<br />
absolute safety can never be achieved; risk can only be reduced to an acceptable level.<br />
<strong>Safety</strong> methods to mitigate harm and reduce risk include:<br />
• Changing the process or mechanical design, including plant or equipment layout<br />
• Increasing the mechanical integrity of equipment<br />
• Improving the basic process control system (BPCS)<br />
• Developing additional or more detailed training procedures <strong>for</strong> operations and<br />
maintenance<br />
• Increasing the testing frequency of critical components<br />
• Using a safety-instrumented system (SIS)<br />
• Installing mitigating equipment to reduce harmful consequences; <strong>for</strong> example,<br />
explosion walls, foams, impoundments, and pressure relief systems<br />
<strong>Safety</strong> <strong>Considerations</strong> <strong>Guide</strong> <strong>for</strong> <strong>Triconex</strong> <strong>General</strong> Purpose v2 Systems