A framework for optimizing cross-company prevention in case of adding equipment to a chemical cluster
Faculty of Applied Economics
Antwerpen :UA, 2005
Research paper / UA, Faculteit TEW ; 2005:13
University of Antwerp
Adding new equipment (e.g. an installation) to an existing network of chemical installations alters the existing danger equilibrium of the chemical surrounding complex. Therefore, precaution measures for preventing external domino effects have to be updated. The Hazwim framework, based on the Process Hazards Analysis (PHA) techniques of Hazop, What-if analysis and the Risk Matrix has been developed to prevent knock-on effects for an existing cluster of chemical plants. However, preventive safety measures for new installations based on PHA implementation in the design phase are preferred to the use of protection- and mitigation measures derived from non-design PHAs. The risk analysis techniques suggested by the authors allowing for the design of inherently safe installations are then evaluated based on Belgian government recommendations and Belgian Seveso plant practices. Next, based on the proposed techniques this paper presents a framework called Installation Plus for redesigning external domino accident prevention when adding an installation to an existing chemical facility. Installation Plus integrates enhanced cross-company cooperation on process hazards and risk assessment activities with the selection of Safety Instrumented Functions offering the appropriate integrity requirements.