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Author(s): R. Rusli & A. M. Shariff
Abstract:
The application of Inherent Safety (IS) principles and Inherently Safer Design
(ISD) concept has been proven to reduce the risk of accidents and is
economically attractive for chemical process plants.
However, they also suffer
from several trade-offs or conflicts that arise from the modification suggested by
the concept.
A design which is identified to be inherently safer from one hazard
could possibly alter the magnitude of other hazards, which were previously not at
a critical level.
Therefore, an IS tool should emphasise this limitation before a
decision can be made, in order to obtain the best ISD alternatives.
This paper
presents a likelihood tool to evaluate the potential hazard conflicts in ISD
alternatives at preliminary design stage.
The tool is part of a framework which is
developed based on risk approach.
The proposed tool is applied to hydrogen
storage systems with the objective to prevent and minimise potential fire and
explosion.
The results have shown that the new tool is able to highlight the
potential new hazards and variation of magnitude of existing hazards which
emerged when the hydrogen storage is changed according to the ISD concept at
preliminary design stage.
Keywords:
hazard conflicts, inherent safety, inherently safer design, risk
analysis, preliminary process design.
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Pages: 12
Size: 437 kb
Paper DOI: 10.2495/RAV110491
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