Page 295 - Design of Simple and Robust Process Plants

References 281
± Storage capacities
± Utility supplies reliability and availability
. A step-wise methodology has been described for a site vulnerability study.
For a large integrated complex, the problem is split into supply chains.
. The utility supplies play a dominating role in site vulnerability. A detailed
reliability study must be performed for each utility and gas supplies such as
hydrogen, based on component analysis. For utility supplies, common cause
failures tend to dominate the unavailability where redundancy is used to
improve system reliability. The methodology to identify and quantitatively
incorporate common cause failures in the reliability study is referred to.
. The results of the site vulnerability study can be presented in a prioritized list
of contributors to unavailability and outages over time.
. Evaluation of alternatives makes a cost±benefit analysis possible, and forms a
good quantitative basis for site investments.

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