CONSEQUENCE MODELLING
Dispersion modelling –
The results of a heavy gas dispersion codes can have significant variations. An example of a footprint of LNG dispersion following the grounding of a LNG carrier, using BP’s CIRRUS software package is shown in the graph. The results are checked with the empirical Britter-McQuaid model.
Fire modelling -
jet fire radiation contours from a large gas release on the deck of a drilling vessel are presented on the right. This type of fire modelling is utilised in Fire and Explosion Analysis (FEA) and Escape, Evacuation and Rescue Analysis (EERA), etc.
Catastrophic tank failure
– Computational fluid dynamics calculations of two- and three-dimensional catastrophic tank failure scenarios involving tank design with a dike, bund wall and full secondary containment (LNG tank) confirmed the amount of liquid that could escape, and came up with a dynamic pressure load profile for secondary containment systems. Snapshots of the fluid release following an axisymmetric failure mode of a steel tank are shown.
Seismic and impact
assessment of LNG tanks – Seismic and impact response analysis was carried
out for a 60,000 m3 and a 100,000 m3 tanks in Huelva
(Spain). The methodology consisted of hand calculations, and numerical modelling
using a simple and the three-dimensional finite element models. A non-linear
dynamic analysis was conducted to simulate the impact of cylindrical objects of
1,000 kg and 2,000 kg flying at 50 m/s.
Modelling extreme load effects - Risk Support collaborates with Principia S.A. in this area.