Risk assessment of major hazards: the effect of ground slope


Hankin, Robin K.S. (2003) Risk assessment of major hazards: the effect of ground slope. Journal of Loss Prevention in the Process Industries, 16, (4), 305-311. (doi:10.1016/S0950-4230(03)00020-2).

Download

Full text not available from this repository.

Description/Abstract

Liquefied gases, such as chlorine and ammonia, are stored in large quantities at industrial sites. If released accidentally, they form a heavy gas cloud that has the potential to kill or injure large numbers of people. The dispersion of such a cloud is thus of interest to the risk assessment community [Nussey, Pantony, & Smallwood, 1992. HSE’s risk assessment tool, RISKAT. In: Major Hazards: Onshore and Offshore. pp. 607–638].

Little is understood about the effect of slope on risk. Here, the risk (probability) of being exposed to the gas cloud, given a release, is considered; probability language is needed because wind direction is assumed to be a random variable.

This paper shows how the risk of being exposed to toxic gas released over a slope may be estimated using simple physical modelling.

The physical model used is that of Tickle [J. Hazard. Mater. 49 (1996) 29], who showed that a finite-volume instantaneous release on an inclined plane can form a stable wedge-shaped cloud that moves down the line of greatest slope. Nonzero windspeeds are accounted for by following Tickle’s suggestion of vectorially adding windspeed to the advection induced by the slope.

A range of windspeeds and slopes are considered. The slopes substantially affect the risk in the sense that the predicted risk contours are far from circularly symmetric.

Item Type: Article
ISSNs: 0950-4230 (print)
Related URLs:
Keywords: Heavy gas dispersion; Risk assessment; Slopes
Subjects: H Social Sciences > HA Statistics
Divisions: University Structure - Pre August 2011 > National Oceanography Centre (NERC)
ePrint ID: 58562
Date Deposited: 14 Aug 2008
Last Modified: 27 Mar 2014 18:41
URI: http://eprints.soton.ac.uk/id/eprint/58562

Actions (login required)

View Item View Item